WO2012130149A1

WO2012130149A1 - Absorbent article with super air permeability

Info

Publication number: WO2012130149A1
Application number: PCT/CN2012/073251
Authority: WO
Inventors: 韩富
Original assignee: Han Fu
Priority date: 2011-03-30
Filing date: 2012-03-29
Publication date: 2012-10-04
Also published as: CN102727345A; CN102727345B

Abstract

An absorbent article having super air permeability comprises a liquid-permeable top layer (2), a liquid-permeable or liquid-impermeable bottom layer (1) and a liquid-absorbent, liquid-retaining layer (3) disposed between said top layer (2) and bottom layer (1). In order to make the absorbent article achieve air-permeability without liquid leakage or urine leakage, the absorbent article comprises one or a plurality of first through-holes (10) and at least one leakage-prevention structure corresponding to the first through-holes (10). The first through-holes (10) penetrate the absorbent article in the thickness direction thereof from the top layer (2) to the bottom layer (1), thus accelerating outward discharge of humidity from the enclosed space formed between the absorbent article and the body surface of the user. The leakage-prevention structure can be chosen from among: a leakage-preventing absorbent body (11), a thickened ring structure surrounding the holes, a liquids-blocking material that expands when absorbing liquids (12), flow-guide channels (13) and any combination of these in order to prevent leakage from the through-holes (10) of contaminated liquids. The air-permeability of the absorbent article can also be increased by the introduction of other substitute or auxiliary optional permeable structures (19).

Description

Ultra-breathable absorbent article

The object of the present invention is to provide a super breathable absorbent article, especially a feminine hygiene product (such as a sanitary napkin), an infant diaper, a diaper, a trousers, an adult care product, and a care product for pets and other animals. Wait. Background technique

With the improvement of living standards and science and technology, sanitary napkins, diapers and other absorbent articles have been widely used. The advent of modern absorbent articles has greatly facilitated the care work, but regardless of the liquid absorbing properties of the absorbent article and the ability to hold the liquid, body fluids such as urine are always immersed in the interior. Limited by the performance of structural and leak-proof materials, such absorbent articles have poor air permeability, which is not conducive to keeping the internal environment dry and other shortcomings, and may cause problems such as diaper rash, dermatitis and other diseases or complications. Therefore, it is necessary to improve the existing absorbent product technology.

For example, in the case of a disposable diaper, the structure of a diaper currently common on the market is mainly an absorbent layer in the middle for absorbing and retaining a dirty liquid such as urine. The upper and lower surfaces of the absorber layer are respectively a water-permeable inner layer and a leak-proof outer layer, the inner layer is close to the body surface, and the outer layer is close to the clothes. The inner and outer ends are connected by elastic members, locking members or other connecting means, forming a circumference around the user's waist and forming a closed relationship with the user's body surface for fixing the absorbent article and preventing urine Wait for leakage from the front and rear sides. The left and right sides of the absorber layer have elastic or non-elastic side leakage protection edges to prevent urine from leaking from both sides. The seal of the waist and the retaining edges on both sides almost completely close the space formed between the diaper and the body, and theoretically prevent the leakage of body fluids and the like. The breathability of such diapers depends to a large extent on the breathability of the materials used in the diapers, while the materials with good breathability have poor leakage resistance, and the general materials have poor gas permeability during wet conditions. Ideally, the body part wrapped by the diaper is not breathable, and the surrounding environment of the skin is easily moist and stuffy, causing allergies, diaper rash and the like under the action of urine. Cause Providing an absorbent article that is both leak-proof and breathable, such as a diaper, has great social and economic benefits. Summary of the invention

In the prior art, it is difficult to ensure that the absorbent article has good gas permeability without leaking. Since the entire outer surface of the garment has a bottom layer, the material of the bottom layer is used more, and the gas permeability of the bottom layer is generally poor, resulting in poor gas permeability of the absorbent article. A very intuitive idea is to open the bottom layer to improve its gas permeability, which can greatly improve the breathability of the absorbent article, but it is easy to leak body fluids and other pollutants. Therefore, how to further prevent the outflow of bodily fluids on the basis of open-hole ventilation and maintain the gas permeability in a humid environment is one of the basic starting points of the present invention.

In order to achieve the effect of venting, leaking or venting without leaking urine, one measure of the present invention is to provide one or more places on the absorbent article from the top layer to the bottom layer through the absorbent article. Throughout the perforation, the outside air can directly reach the enclosed space of the absorbent article and the body, thereby accelerating the moisture in the enclosed space to the outside of the body. In order to prevent body fluid from leaking through the first through hole, the absorbent article further comprises a leakage absorbent body, a ring hole thickening leakage feature, a liquid absorption expansion barrier dam, a guide groove, and the like to prevent body fluids from being removed. A feature of one or more of the features of the first through hole leaking.

Additionally or alternatively, the absorbent article may contain one or more selective breathable structures.

According to the present invention, there is provided an absorbent article having improved gas permeability, comprising a liquid permeable top layer, a liquid permeable or liquid impermeable back layer adjacent to a body surface of a user, and sandwiching An absorber layer between the liquid top layer and the liquid permeable or liquid impermeable backsheet of the absorbent article. The absorber layer absorbs liquid and has liquid retention. The liquid-permeable or liquid-impermeable underlayer of the absorbent article has a projected surface area in the thickness direction of the absorbent article that is greater than or equal to a projected surface area of the absorbent body layer in the thickness direction of the absorbent article. The surface of the liquid-permeable or liquid-impermeable underlayer of the absorbent article is divided into two parts, a part of which absorbs the absorbent layer of the absorbent article The cover covers the bottom layer, and the other portion is the bottom layer of the peripheral region that does not cover the absorber layer. The absorbent article of the present invention is characterized in that it comprises at least one of the following features for improving gas permeability: A. The absorbent article comprises one or more from the liquid permeable top layer to the absorbent The liquid permeable or liquid impermeable bottom layer of the article penetrates the first through hole of the absorbent article; and, corresponding to the first through hole, the absorbent article further includes at least one leakproof structure, For preventing leakage of bodily fluid from the first through hole of the absorbent article; and B. The absorbent article comprises one or more selectively permeable structures, the selective venting structure is to absorb the The liquid permeable or liquid impermeable bottom layer of the article is partially combined with the liquid permeable top layer or another liquid permeable material to form a closed space, and a liquid swellable structure is disposed in the closed space, and The upper and lower surfaces of the enclosed space are provided with one or more apertures or slits extending through the interior and exterior of the enclosed space for venting.

Preferably, the leak-proof structure of the absorbent article is selected from the group consisting of a leak-proof absorbent body, a ring-hole thickening leak-proof structure, a liquid-absorbent expansion barrier dam, a guide groove, or any combination thereof.

According to an aspect of the invention, the leak-proof structure includes at least a leak-proof absorbent body, the leak-proof absorbent body is disposed around the first through-hole on a liquid-permeable top layer of the absorbent article, and And a second through hole communicating with the first through hole, the leaky absorbent body includes a liquid absorbing structure, and the liquid swellable structure causes the leakproof absorption in a state of liquid absorption The body volume expands to block body fluid from leaking out of the first through hole and the second through hole.

Preferably, each of the first through holes may be provided with one of the leak-proof absorbent bodies, and each of the leak-proof absorbent bodies includes the liquid permeation of the leak-proof absorbent body or a liquid-impermeable underlayer having the same or similar surface contact layer as the liquid-permeable or liquid-impermeable underlayer of the leak-proof absorbent body, the liquid-permeable or impervious in the leak-proof absorbent body The liquid swellable structure is encapsulated between the liquid underlayer and the surface contact layer. Each of the leak-proof absorbers may be provided with one or a pair of second through holes communicating with the first through holes, the second through holes penetrating the liquid permeating body of the leak-proof absorbent body Or a liquid-impermeable backsheet, the surface contact layer, and the liquid-swellable structure. The expansion of the liquid-swellable structure does not damage the leak-proof absorbent body, and the liquid-swellable structure includes Liquid swellable material.

Preferably, the liquid-swellable material is an organic or inorganic material capable of absorbing water or expanding body fluid and being insoluble in water or body fluid in a body temperature environment, and the liquid swellable material comprises at least one of the following materials:

Superabsorbent polymer or superabsorbent;

a synthetic material; comprising a synthetic hydrogel polymer; the synthetic hydrogel polymer comprising an alkali metal polyacrylate, polyacrylamide, polyvinyl alcohol, polyacrylic acid, polyacrylamide, polyethylene, and the like Other suitable polymers include hydrolyzed acrylonitrile grafted starch, acrylic acid grafted starch, and isobutylene maleic acid copolymerization and mixtures thereof;

Crosslinked acrylic acid polymers and copolymers thereof, including all or part of alkali metals, alkaline earth metals and aluminum, zinc and iron salts, and poly(methacrylic acid), polyacrylamide, poly

(N, N-dimethyl acrylamide) and polymethacrylamide;

Crosslinked polyvinylpyrrolidone, a copolymer of polyvinylpyrrolidone containing polyvinyl acetate; polymethyl-, polyethyl-, polybutyl-vinyl ether and copolymers derived from vinyl ether, including methylethylene a copolymer of an ether and maleic anhydride or maleic acid;

a polyethylene oxide having a molecular weight of from about 100,000 to 8,000,000;

Naturally derived polysaccharides (glue); and semi-synthetic derivatives thereof, including alginic acid and its salts, agar, locust bean gum, carrageenan, gelatin, starch; and cellulose derivatives, including carboxymethyl Cellulose and cellulose acetate, pectin, guar gum, xanthan gum; skin and analogs;

Polyethyleneimine; polyacrylaldehyde; styrene-maleic acid liver copolymer; ethylene-maleic anhydride copolymer; polydimethylaminoethyl methacrylate; polyalkylene polyamine; (Vinylbenzyltrimethylammonium chloride) and similar quaternary ammonium polymers; polymaleic anhydride; low molecular weight phenolic resin; low molecular weight urea formaldehyde resin.

Since the absorbent article of the present invention can directly exchange gas with the outside, the moisture characteristics of the absorbent article and the human body are closed and the contact area is greatly improved, so that the surface of the user's skin is more dry and comfortable. At the same time, a leak-proof absorbent body is provided around the first through hole to block the leakage of body exudates to the area outside the first through hole. When there is no excrement, the leaky absorbent body is in a dry, small volume state, making it comfortable to wear. When the excrement reaches the vicinity of the first through hole, since the leaky absorbent body absorbs liquid, in the first pass A perforation and a barrier around the second through hole can still reliably prevent leakage of body fluid.

According to another aspect of the invention, the leak-proof structure includes at least a ring-hole thickening leakage structure, wherein the ring-hole thickening leakage structure comprises at least one of the following structures: C. at the first The absorber layer at the peripheral region of the through hole has at least one of a larger thickness, a larger liquid swellable material, or a material having better liquid swellability than the absorber layer in the adjacent region. Ring hole thickening leakage structure; and D. all or part of the closed or semi-closed pattern in the range of 3-40 mm from the side of the first through hole, all surrounding or partially surrounding the first through hole and a range including all or a portion of the peripheral region, and at the boundary of the surrounding range, the liquid permeable top layer of the absorbent article and the liquid permeable or liquid impermeable underlayer of the absorbent article pass A ring-hole thickened leak-proof structure formed by bonding, hot pressing, ultrasonic or sewing in part or in whole by direct or indirect bonding.

The leak-proof absorbent body may also include a ring-hole thickening leakage structure, wherein the ring-hole thickening leakage structure comprises at least one of the following structures: C. at a peripheral region of the second through hole a liquid swellable structure having a larger thickness, a more liquid swellable material, or a material having at least one characteristic of a material having better liquid swellability than a liquid swellable structure in an adjacent region thereof a hole thickening leakage structure; and, D. all or part of the closed or semi-closed pattern in the range of 3-40 mm from the side of the second through hole, all surrounding or partially surrounding including the second through hole and all a range including a portion of the peripheral region, and the liquid-permeable or liquid-impermeable property of the surface contact layer of the leak-proof absorbent body and the leak-proof absorbent body at a boundary of the surrounding range A ring-hole thickened leak-proof structure formed by bonding, hot pressing, ultrasonic or sewing in part or in whole by direct or indirect bonding.

Superabsorbent polymer or superabsorbent;

a synthetic material; comprising a synthetic hydrogel polymer; the synthetic hydrogel polymer comprising an alkali metal polyacrylate, polyacrylamide, polyvinyl alcohol, polyacrylic acid, polyacrylamide, polyethylene, and the like Other suitable polymers include hydrolyzed acrylonitrile Starch starch, acrylic acid grafted starch, and isobutylene maleic acid copolymerization and mixtures thereof; crosslinked acrylic acid polymers and copolymers thereof, including all or part of alkali metal, alkaline earth metal salts and aluminum, zinc and iron salts, And poly(methacrylic acid), polyacrylamide, poly

(N, N-dimethyl acrylamide) and polymethacrylamide;

The annular hole is thickened by the annular hole so that the peripheral region of the through hole has a liquid absorption saturation of a region smaller than or equal to a distance from the through hole, and the peripheral region of the through hole has a larger area than the adjacent region. Greater thickness. Therefore, by virtue of the ring hole thickening leakage structure, it is possible to prevent body fluid from leaking from the through hole.

According to another aspect of the present invention, the leak-proof structure includes at least one or more liquid-absorbent expansion barrier dams, and the liquid-absorbent expansion barrier dam is disposed in the first through-hole and is separated from body fluids or excretions. Between the parts of the body. The liquid-absorbent expansion barrier dam is comprised of a water permeable material or structure and a liquid-swellable structure encased therein.

Preferably, the water permeable material or structure for constituting the liquid absorption expansion barrier dam may be combined with a boundary of a partial surface or a portion of the surface of the water permeable top layer of the absorbent article to form a three-dimensional closed The leak-proof dam enclosure space is encapsulated in the closed space of the leak-proof dam to form the liquid-absorbent expansion barrier dam.

Preferably, the liquid swellable structure comprises a liquid swellable material; and the liquid absorbing expansion dam is not damaged by expansion of the liquid swellable structure. Preferably, the liquid swellable material is an organic or inorganic material capable of absorbing water or expanding body fluid and being insoluble in water or body fluid under a body temperature environment, and the liquid swellable material comprises at least one of the following materials:

Superabsorbent polymer or superabsorbent;

(N, N-dimethyl acrylamide) and polymethacrylamide;

Preferably, the liquid-absorbent expansion barrier dam is combined with the liquid-permeable top layer of the absorbent article in a surface contact manner on one side in the longitudinal direction thereof and its peripheral region.

Preferably, the boundary contour of the contact surface of the liquid-absorbent expansion barrier dam and the liquid-permeable top layer may be a line shape, a corrugation shape, a line segment, a circle, a semicircle or a cross line, or a line segment or an arc The various shapes formed by the combination are disposed between the first through hole and a portion of the user's body fluid or excrement leaving the body, or surround and partially or completely surround the first through hole, thereby functioning as a flow blocking With the role of drainage. Preferably, the surface area of the liquid-absorbent expansion barrier dam opposite to the contact surface of the liquid-permeable top layer of the absorbent article and close to the surface of the user may be bonded, hot pressed, and ultrasonically Or a sewing method combined with a hydrophobic non-woven fabric or foam, a mesh structure to improve the comfort and dryness of the surface contact with the user.

In the dry state, the liquid-absorbent expansion barrier dam is small in volume and soft to the touch, and the outer surface of the liquid-permeable top layer of the absorbent article is in a state of stagnation, which does not cause significant discomfort to the user. After the liquid-absorbent expansion barrier dam expands, the volume becomes larger and the hardness increases. The high-absorbent polymer inside the liquid swells and swells, and squeezes each other to form a dense and impervious wall, which hinders the direct flow of the body fluid. The first through hole, and/or the body fluid is infiltrated into other areas to prevent body fluid from leaking out of the first through hole.

According to another aspect of the present invention, the leak-proof structure includes at least one or more flow guiding grooves, and the flow guiding groove is disposed at a portion of the first through hole and a user's body fluid or excrement leaving the body. between. The flow guiding groove refers to a groove which is formed at a certain portion of the surface of the liquid-permeable top layer of the absorbent article and which is more effective in the liquid-swelling state.

The flow guiding groove is formed at a local position of the absorbent article by pressing, bonding, hot pressing, locking, sewing or ultrasonic, and is used for restricting the absorption of the absorbent article after the liquid absorption is expanded. The maximum spacing between the liquid top layer and the liquid permeable or liquid impermeable backing layer of the absorbent article is less than a specific value at the portion of the flow guiding groove.

Preferably, the specific value is a value between 0.1 mm and 30 mm.

In addition, alternatively or additionally, a liquid swellable material having a smaller thickness than an adjacent portion thereof may be employed in the absorbent body at a portion where the flow guiding groove needs to be formed in the absorbent article, a less liquid-swellable material, or a material and/or structure having a weak liquid-swelling property, such that the thickness of the portion after the liquid-absorbent expansion is smaller than the thickness of the adjacent portion thereof, thereby forming the flow guiding groove .

Preferably, the contour of the guide groove on the liquid-permeable top surface of the absorbent article may be a fold line, a corrugation, a line segment, a circle, a semicircle, a triangle, a quadrangle or a straight line. Or in the form of a pattern of various combinations of line segments and arcs, surrounded by the first through hole and the body fluid or excrement of the user of the absorbent article, surrounded by part or all The first through hole. In the dry state, the flow guiding groove is small in volume and soft to the touch, and the outer surface of the liquid permeable top layer of the absorbent article is in a contracted state, and does not cause significant discomfort to the user. After the liquid swell is expanded, the volume of the absorber layer becomes thicker and thicker, and the hardness is increased. At this time, the expansion of the absorber layer in a certain area is restricted by local bonding, and/or by using different expansion coefficients locally. The liquid swellable material such that the degree of expansion of the adjacent regions of the absorbent layer under the same external conditions is different, thereby forming the flow guiding groove on the liquid permeable top layer of the absorbent article, hindering The body fluid flows directly to the first through hole and guides the body fluid to flow into other areas to prevent body fluid from leaking out of the first through hole.

Preferably, according to the present invention, the selective gas permeable structure may be disposed in the bottom layer portion of the peripheral region of the absorbent article, wherein the liquid permeable or not of the absorbent article passing through the bottom layer of the peripheral region The liquid permeable underlayer is partially bonded to the liquid permeable top layer or another liquid permeable material to form a bonding region and a non-bonding region surrounded by the bonding region, the unbonding region forming a first closed space, The inside of the first closed space is provided with a liquid swellable structure, and small holes or slits penetrating the inside and outside of the first closed space are provided on the upper and lower surfaces of the first closed space for ventilation. The components of the liquid-swellable structure do not leak from the outside of the small holes or slits to the outside of the first closed space. The first enclosed space is not destroyed by expansion of the liquid-swellable structure, and the liquid-swellable structure comprises a liquid-swellable material.

Alternatively or additionally, the selective gas permeable structure may also be disposed in the absorbent body covering the bottom layer portion of the absorbent article, wherein the absorbent article covering the underlying region by the absorbent body is transparent The liquid or liquid impermeable underlayer portion is combined with the liquid permeable top layer or another liquid permeable material at a localized location to form one or more liquid permeable top layers or additional regions surrounded by the bonded locations a second closed space formed by the liquid permeable material surrounding the liquid-permeable or liquid-impermeable bottom layer of the absorbent article, disposed on the upper and lower surfaces of the second closed space through the second closed space The holes or slits are used for ventilation. The junction points of the same second enclosed space are connected to form a closed curve. Providing a liquid swellable structure inside the second closed space, the second closed space is not broken by expansion of the liquid swellable structure, and the liquid swellable structure comprises liquid swellable material . The composition of the liquid-swellable structure does not pass from the small hole or slit and the liquid-permeable or liquid-impermeable underlayer of the absorbent article to the liquid-permeable top The layer or additional liquid permeable material leaks outside of the second enclosed space outside of the portion where the local locations are joined.

Preferably, the liquid swellable structure of the selective gas permeable structure is composed of a cellulose fluff pulp, a fabric layer, and a liquid swellable material having a liquid swellable property (such as a superabsorbent polymer or a super absorbent body, a structure composed of an absorbent foam or an absorbent nonwoven material; or a mesh or package formed by a hydrophilic or hydrophobic nonwoven fabric, or a water-absorbent paper material, or a combination of a partially hydrophilic material and a partially hydrophobic material; The structure encloses a structure formed of a cellulosic fluff pulp, a fabric layer, and the liquid swellable material.

Preferably, the water content of the liquid-swellable structure reaches a liquid saturation level thereof

When the degree of liquid absorption in the range of 1/100 to 2/3, the volume of the liquid-swellable structure naturally expands can block the leakage of body fluid from the selective gas permeable structure.

Preferably, according to the present invention, the liquid-swellable material is an organic or inorganic material capable of absorbing water or expanding body fluid and being insoluble in water or body fluid in a body temperature environment, and the liquid swellable material comprises at least at least One:

Superabsorbent polymer or superabsorbent;

Crosslinked acrylic acid polymers and copolymers thereof, including all or part of alkali metal, alkaline earth metal salts and aluminum, zinc and iron salts, and poly(methacrylic acid), polyacrylamide, poly(N, N-di Methyl acrylamide) and polymethacrylamide;

Naturally derived polysaccharides (glue); and semi-synthetic derivatives thereof, including alginic acid and its salts, agar, locust bean gum, carrageenan, gelatin, starch; and cellulose derivatives, including carboxymethyl Cellulose and cellulose acetate, pectin, guar gum, xanthan gum; skin and analogs; Polyethyleneimine; polyacrylaldehyde; styrene-maleic acid liver copolymer; ethylene-maleic anhydride copolymer; polydimethylaminoethyl methacrylate; polyalkylene polyamine; (Vinylbenzyltrimethylammonium chloride) and similar quaternary ammonium polymers; polymaleic anhydride; low molecular weight phenolic resin; low molecular weight urea formaldehyde resin.

Preferably, in the present invention, the liquid permeable material for forming the selective gas permeable structure may comprise: a liquid permeable nonwoven material, including spunbonding, melt blowing, carding, hydraulic acupuncture, or Wet-laid material; other liquid-permeable structure, including porous foam, or porous plastic film; or water-absorbing material, including absorbent paper material; or the liquid-permeable material consists of natural fiber, rayon, or natural and a mixture of rayon fibers; the natural fiber comprises wood pulp or cotton fiber; the rayon fiber comprises polyester, polyethylene, polypropylene, viscose, or rayon; or the liquid permeable material is made of linen Made of fibers, the linen fibers are bonded to each other in a bonding model.

With the selective gas permeable structure of the present invention, when the exudate reaches the region of the selective gas permeable structure, the liquid swellable structure inside the closed cavity is in a dry small volume state, the closure There is space in the cavity to complete the task of exchanging gases. When a certain amount of liquid reaches the inside of the closed cavity, the liquid-swellable structure inside the cavity absorbs and expands, and the small holes or slits on both sides of the closed cavity and the selectivity The internal space of the ventilating structure is sealed to prevent leakage of excrement.

Preferably, according to the present invention, the liquid permeable top layer of the absorbent article and the liquid permeable or liquid impermeable bottom layer of the absorbent article may be directly bonded in a peripheral region of the first through hole, Thereby encapsulating other structures and components of the absorbent article that are penetrated by the first through hole between the liquid permeable top layer and the liquid permeable or liquid impermeable underlayer of the absorbent article Between the liquid permeable top layer and the liquid permeable or liquid impermeable backing layer of the absorbent article.

Preferably, at the first through hole, the liquid permeable or liquid-impermeable first through-hole encapsulation layer formed by one or more sheets may be passed through the absorbent article, and the liquid permeability a top layer and the liquid permeable or liquid impermeable backing layer of the absorbent article are respectively bonded at a peripheral region of the first through hole, thereby absorbing the liquid permeable top layer and the absorbent of the absorbent article Other structures and components interposed between the liquid-permeable or liquid-impermeable backsheet of the article through the first through-hole are encapsulated in the liquid-permeable top layer and the absorbent article The liquid permeable or liquid impermeable underlayer and the first through hole encapsulation layer.

Preferably, the first through-hole encapsulation layer has a pleated structure. Preferably, the first through-hole encapsulation layer is made of a liquid-impermeable material such as ethylene, polyethylene plastic, non-liquid permeable non-woven fabric, polyethylene or polypropylene film, non-woven fabric with liquid-impermeable material coating. A material, a hydrophobic nonwoven material that prevents liquid permeation, or a laminate of a plastic film and a nonwoven material.

Preferably, according to the present invention, the liquid-permeable or liquid-impermeable backing layer and the surface contact layer of the leak-proof absorbent body may be bonded, heat-pressed, and locked in a peripheral region of the second through-hole. Bonding, ultrasonically or stitching to thereby couple the leakage-resorbing body between the surface-contacting layer and the liquid-permeable or liquid-impermeable underlayer of the leak-proof absorbent body Other structures and components penetrating the two through holes are encapsulated between the surface contact layer and the liquid permeable or liquid impermeable backing layer of the leaky absorbent body.

Preferably, the leak-leakage absorber may pass through a second through-hole encapsulation layer formed by combining one or more sheets with the liquid-permeable or liquid-impermeable underlayer of the leak-proof absorber and the surface The contact layer is respectively bonded at a peripheral region of the second through hole by bonding, hot pressing, locking, ultrasonic or sewing, thereby contacting the surface contact layer and the block of the leaky absorbent body Other structures and components interposed between the liquid-permeable or liquid-impermeable underlayer of the leaky absorbent body through the second through-hole are encapsulated in the surface contact layer and the liquid-permeable body of the leak-proof absorber Or between the liquid-impermeable underlayer and the second through-hole encapsulation layer.

Preferably, the second through-hole encapsulation layer has a pleated structure. And preferably, the second through-hole encapsulation layer is made of a liquid-impermeable material such as ethylene, polyethylene plastic, a liquid-impermeable non-woven fabric, a polyethylene or polypropylene film, and a non-liquid-permeable material coating. A spun material, a hydrophobic nonwoven material that prevents liquid permeation, or a laminate of a plastic film and a nonwoven material.

In the present invention, preferably, the first through hole and the second through hole are the same or similar in size and shape, and the first through hole and the second through hole completely coincide or approximate in spatial arrangement. coincide. Further, in the peripheral region of the first through hole and the peripheral region of the second through hole, the liquid permeable top layer of the absorbent article and the liquid permeable or not of the leaky absorbent body The liquid permeable underlayer may be bonded together by bonding, hot pressing, crimping, ultrasonic or sewing to prevent leakage of bodily fluids from the joint.

Preferably, according to the present invention, the absorbent article and the leak-proof absorbent body may be in the first pass by a crimping structure penetrating the first through hole and the second through hole. The perforations are tightly coupled to the peripheral region of the second through hole. Wherein, in the peripheral region of the first through hole and the peripheral region of the second through hole, the liquid permeable top layer of the absorbent article and the liquid permeable or liquid impermeable bottom layer of the leaky absorbent body Tightly combined to prevent fluid outflow.

Preferably, the inner surfaces of the first through hole and the second through hole are encapsulated in the buckle structure.

Preferably, the buckle structure is a flexible structure.

Alternatively, the crimping structure may be a rigid structure.

Preferably, according to the present invention, a third through-hole encapsulation layer formed by combining one or more sheets may be used, and the one end of the third through-hole encapsulation layer and the liquid-permeable or non-exhaustive absorber may be The liquid permeable underlayer is bonded to the peripheral region of the second through hole by bonding, hot pressing, locking, ultrasonic or sewing; and the other end of the third through hole encapsulating layer is bonded and heat pressed And the liquid permeable top layer of the absorbent article is directly or indirectly joined to the peripheral region of the first through hole by a lock, an ultrasonic wave or a sewing method.

Preferably, the third through-hole encapsulation layer has a pleated structure. And preferably, the third through-hole encapsulation layer is made of a liquid-impermeable material such as ethylene, polyethylene plastic, a liquid-impermeable non-woven fabric, a polyethylene or polypropylene film, and a non-liquid-permeable material coating. A spun material, a hydrophobic nonwoven material that prevents liquid permeation, or a laminate of a plastic film and a nonwoven material.

Preferably, according to the present invention, a fourth through-hole encapsulation layer formed by one or more sheets may be used to penetrate the first through hole of the absorbent article and the second through hole of the leak-proof absorbent body. And the surface contact layer of one end of the fourth through-hole encapsulation layer and the surface of the second through-hole is bonded, heat-pressed, latched, ultrasonically or stitched in a peripheral region of the second through-hole The other end of the fourth through-hole encapsulation layer is bonded, heat-pressed, latched, ultrasonically or sewed with the liquid-permeable or liquid-impermeable underlayer of the absorbent article. The peripheral regions of the first through holes are combined. The liquid permeable top layer of the absorbent article in the peripheral region of the first through hole and the liquid permeable or impervious of the leaky absorbent body in a peripheral region of the second through hole The liquid underlayers are respectively or together combined with a portion of the middle of the fourth through-hole encapsulation layer.

Preferably, the fourth through-hole encapsulation layer has a pleated structure. And preferably, the fourth through-hole encapsulation layer is made of a liquid-impermeable material such as ethylene, polyethylene plastic, non- A liquid permeable nonwoven fabric, a polyethylene or polypropylene film, a nonwoven material having a liquid-impermeable material coating, a hydrophobic nonwoven material that prevents liquid permeation, or a laminate of a plastic film and a nonwoven material.

Preferably, in the present invention, the first through hole may be provided in a region where the liquid permeable or liquid impermeable underlayer is present in the absorbent article.

Preferably, the first through hole is disposed in a region of the absorbent article that is not directly facing the body fluid or excrement of the user away from the body, so as to prevent body fluid or excrement from directly from the first through hole. External leakage.

Preferably, one or more of the first through holes are provided in an area corresponding to a portion where the user easily produces diaper rash and other skin diseases, or in an area where body fluids or excretions are not easily accessible.

Preferably, the first through hole is provided in an area of the absorbent article located in the vicinity of the user's anus, the groin, or the butt, or in the longitudinal end regions of the absorbent article.

More preferably, one or more of the first through holes are provided in an area corresponding to a portion where the user easily produces a diaper rash, that is, an area near the user's anus, the groin, or the butt, and is disposed in the body fluid or excreted. The area where the object is not easily accessible, that is, the longitudinal end regions of the absorbent article and the groin portion of the user.

Preferably, according to the present invention, when the leak-proof absorbent body is disposed on the bottom layer of the peripheral region of the absorbent article that does not have the absorber layer, the permeation of the leak-proof absorbent body a liquid or liquid impermeable back layer directly bonded to a peripheral region surrounding the first through hole of the liquid permeable or liquid impermeable bottom layer of the absorbent article in a peripheral region surrounding the second through hole a combination of hot pressing, locking, ultrasonic or sewing; at the same time, the liquid-permeable or liquid-impermeable backing layer of the leak-proof absorbent body is in a peripheral region surrounding the second through hole and the leaking The surface contact layer of the absorbent body is directly bonded by bonding, hot pressing, locking, ultrasonic or sewing in a peripheral region surrounding the second through hole or by being respectively bonded to the second through hole encapsulating layer And a combination of hot pressing, locking, ultrasonic or sewing to encapsulate a material, a structure, or the like wrapped in the leakage-receiving body penetrated by the second through-hole in the leak-proof absorbent body, And avoid Liquid through the second through-hole and the first through-hole leakage.

Preferably, according to the present invention, the liquid permeable or liquid impervious property of the leaky absorbent body A hydrophilic stretchable nonwoven fabric may be used for the bottom layer, and a hydrophobic non-stretchable nonwoven fabric is used for the surface contact layer of the leak-proof absorbent body. The surface contact layer of the leak-proof absorbent body may be provided with a hydrophobic non-woven fabric or foam on its side surface close to the body surface of the user by bonding, hot pressing, locking, ultrasonic or sewing. A mesh structure to improve the comfort and dryness of the skin.

Preferably, the liquid permeable or liquid impermeable underlayer of the leaky absorbent body is identical or similar in contour to the surface contact layer.

Preferably, the liquid-permeable or liquid-impermeable backing layer of the leak-proof absorbent body and the outer shape of the surface contact layer may be various shapes or a combination of various shapes formed by combining a line segment and an arc.

Preferably, the liquid-permeable or liquid-impermeable backing layer of the leak-proof absorbent body and the surface contact layer have a circular, elliptical or polygonal shape.

According to the invention, the second through hole may be provided at any portion of the leaky absorbent body.

Preferably, the second through hole is located at a geometric center of the leaky absorbent body or a peripheral region of the geometric center of the leaky absorbent body.

Preferably, the first through hole and the second through hole may be any shape in which a line segment and a circular arc are combined.

Preferably, the first through hole and the second through hole are circular, elliptical, square, diamond or slit.

Preferably, according to the present invention, at least one of the first through hole and the second through hole may be covered with a hydrophobic mesh or yarn by hot pressing, bonding, crimping, ultrasonic or sewing in a peripheral region. Breathable structure.

Alternatively, by retaining one of the liquid permeable top layer of the absorbent article at the location of the first through hole and the liquid permeable or liquid impermeable backing layer of the absorbent article or Both, such that the first through-hole is only the structure and material of the absorbent article that penetrates the position except the retained liquid-permeable top layer and/or the liquid-permeable or liquid-impermeable backsheet. . Providing a plurality of smaller than the first through holes in the liquid-permeable top layer portion and/or the liquid-permeable or liquid-impermeable bottom layer of the absorbent article at a position of the first through hole Small holes or gaps for ventilation. Preferably, according to the present invention, the liquid-swellable structure of the leak-proof absorbent body may be a cellulose fluff pulp, a fabric layer, and a liquid-swellable material having a liquid-swelling property (such as a superabsorbent polymerization). a structure composed of a super absorbent body, an absorbent foam material, or an absorbent nonwoven material; or a hydrophilic or hydrophobic nonwoven fabric, or a water absorbent paper material, or a partially hydrophilic material and a partially hydrophobic material; The combined network or wrap structure encloses a structure formed from a cellulosic fluff pulp, a fabric layer, and the liquid swellable material.

Preferably, the liquid swellable structure of the leaky absorbent body comprises a shaped structure or material to prevent the liquid swellable material in the liquid swellable structure of the leaky absorbent body from being The leaky absorption absorbs a wide range of movements in the body.

When the degree of liquid absorption in the range of 1/100 to 2/3, the volume of the liquid-swellable structure naturally expands can block the leakage of the body fluid from the first through hole and the second through hole. The leaky absorbent body is not damaged by the expansion of the liquid-swellable structure.

Preferably, according to the present invention, the liquid-swellable structure of the liquid-absorbent expansion barrier dam may be a cellulose fluff pulp, a fabric layer, and a liquid-swellable material having a liquid-swelling property (such as high absorbency). a structure composed of a polymer or superabsorbent, an absorbent foam, or an absorbent nonwoven material; or a hydrophilic or hydrophobic nonwoven fabric, or a water absorbent paper material, or a partially hydrophilic material and partially hydrophobic The mesh or wrap structure formed by the combination of materials encloses the structure formed by the cellulosic fluff pulp, the fabric layer, and the liquid swellable material.

Preferably, the liquid swellable structure of the liquid absorbing expansion barrier dam comprises a shaped structure or material to prevent liquid swellability in the liquid swellable structure in the liquid absorbing expansion barrier dam The material moves over a wide range within the liquid-absorbent expansion barrier dam.

Preferably, when the water content of the liquid-swellable structure reaches a liquid absorption level within a range of 1/100 to 2/3 of the liquid saturation amount thereof, the volume of the liquid-swellable structure after natural expansion can block The body fluid leaks from the first through hole through the liquid absorption expansion barrier dam. The liquid-absorbent expansion barrier dam is not damaged by the expansion of the liquid-swellable structure.

Preferably, according to the present invention, the liquid-permeable or liquid-impermeable underlayer of the leak-proof absorbent body is made of a liquid permeable material, and the liquid permeable material comprises: a liquid permeable non-woven material, including spinning Sticky, meltblown, carded, hydro-acupuncture, or wet-laid materials; other liquid-permeable structures, including porous foam, porous plastic film; or water-absorbing materials, including absorbent paper Material; or

The liquid-permeable or liquid-impermeable underlayer of the leak-proof absorbent body is made of natural fiber, rayon, or a mixture of natural and rayon fibers; the natural fiber includes wood pulp or cotton fiber; Including polyester, polyethylene, polypropylene, viscose, or rayon; or

The liquid-permeable or liquid-impermeable underlayer of the leak-proof absorbent body is made of flax fibers, which are bonded to each other in a bonding model; or

The liquid-permeable or liquid-impermeable bottom layer of the leak-proof absorbent body is made of a liquid-impermeable material, and the liquid-impermeable material comprises ethylene, polyethylene plastic, non-liquid-permeable non-woven fabric, and poly A film of ethylene or polypropylene, a nonwoven material having a coating of a liquid-impermeable material, a hydrophobic nonwoven material that prevents liquid permeation, or a laminate of a plastic film and a nonwoven material.

Preferably, according to the present invention, the liquid-permeable or liquid-impermeable underlayer of the leak-leakage absorber is made of a liquid-impermeable material near the periphery of the second through-hole, the liquid-impermeable property Materials include ethylene, polyethylene plastics, liquid-impermeable nonwovens, polyethylene or polypropylene films, nonwoven materials with liquid-impermeable coatings, hydrophobic nonwoven materials that prevent liquid penetration, or plastic films and a laminated sheet of a spun material; the liquid-permeable or liquid-impermeable underlayer portion of the leak-proof absorbent body at a periphery away from the second through-hole is made of a liquid permeable material, the liquid permeability Materials include: liquid-permeable nonwoven materials, including spunbond, meltblown, carded, hydro-acupuncture, or wet-laid materials; other liquid-permeable structures, including porous foams, porous plastic films; or water-absorbing materials And comprising a water absorbent paper material; or the liquid permeable or liquid impermeable bottom layer of the leaky absorbent body at a distance from the periphery of the second through hole is made of natural fibers, rayon, or natural and man-made fibers Made of a mixture; The natural fiber comprises wood pulp or cotton fiber; the rayon fiber comprises polyester, polyethylene, polypropylene, viscose fiber, or rayon; or the leaking property away from the periphery of the second through hole The liquid-permeable or liquid-impermeable underlayer of the absorbent body is made of flax fibers which are bonded to each other in a bonding model.

Preferably, according to the present invention, the water permeable material or structure of the liquid absorption expansion barrier dam may comprise: a liquid permeable nonwoven material, including spunbonding, melt blowing, carding, hydraulic acupuncture, or wet Other materials, including porous foam, porous plastic film; or water-absorbing material, including absorbent paper materials; or the water-permeable material or knot Constructed from natural fibers, rayon, or a mixture of natural and rayon fibers; the natural fibers include wood pulp or cotton fibers; the rayon fibers include polyester, polyethylene, polypropylene, viscose, or rayon Or the water permeable material or structure is made of flax fibers that are bonded to each other in a bonding model.

Preferably, the absorbent article further comprises a flow guiding layer and a shaped structure disposed between the liquid permeable top layer and the liquid permeable or liquid impermeable backing layer of the absorbent article.

Preferably, the absorbent article further comprises an anti-leakage shield disposed on both sides to prevent side leakage.

Preferably, at least one of the liquid permeable top layer and the liquid permeable or liquid impermeable bottom layer of the absorbent article is connected with an elastic member and a connecting member at an edge portion of both longitudinal ends thereof, so that the through The liquid-permeable top layer and/or the liquid-permeable or liquid-impermeable backsheet of the absorbent article can be joined at its longitudinal ends or at its extensions, surrounding and lying close to the waist of the user, such that the absorbent article The user's body surface surrounds an approximately enclosed space that is formed to store excrement and prevent exudates from leaking out.

According to the present invention, the absorbent article may be a feminine hygiene product, an infant diaper, a diaper, a pull-on pants, an adult care product, or a care product for pets and other animals. DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view of a super gas permeable absorbent article having a leak-proof absorbent body and a selective gas permeable structural member without a two-side anti-leakage shield according to the present invention.

Figure 2 is a cross-sectional view of the super gas permeable absorbent article according to a preferred embodiment of the present invention taken along the line AA of Figure 1, showing the combination of the different through-hole encapsulation layers and then in a direct bond. The main body of the absorbent article and the leak-proof absorbent body, the main body of the absorbent article has a first through hole, and the leak-proof absorbent body has a second through hole.

Figure 3 is a cross-sectional view of the absorbent article according to another preferred embodiment of the present invention taken along the line AA of Figure 1, showing the body and the block of the article of being packaged and bonded together by a through-hole encapsulation layer In the leaky absorbent body, the main body of the absorbent article has a first through hole, and the leaky absorbent body has a second through hole. 4a and 4b are cross-sectional views of the absorbent article according to two different embodiments of the present invention taken along the line AA of Fig. 1, showing the ring hole thickening leakage feature, and eliminating the leaky absorbent body. . In addition, Figure 4a shows a schematic view of the liquid-permeable top layer of the absorbent article and the liquid-permeable or liquid-impermeable backsheet of the absorbent article in combination with the through-hole encapsulation layer; Figure 4b shows the liquid-permeable top layer of the absorbent article and A schematic representation of the direct combination of a liquid permeable or liquid impermeable underlayer of an absorbent article.

Figure 5 is a cross-sectional view of the super gas permeable absorbent article according to still another embodiment of the present invention taken along the line AA of Figure 1, showing the main body and leakproofness of the absorbent article joined together in a direct bonding manner. The absorber, the main body of the absorbent article has a first through hole, and the leaky absorbent body has a second through hole.

Figures 6a and 6b are cross-sectional views of a super-breathable absorbent article according to still another embodiment of the present invention taken along the line AA of Figure 1, showing the main body of the absorbent article joined together in a combined manner. In the leakage absorbent body, the main body of the absorbent article has a first through hole, and the leaky absorbent body has a second through hole.

Figure 7 is a schematic view of another super-breathable absorbent article having a side leakage preventing screen and having a first through hole and an elongated liquid absorption expansion block according to the present invention. Liquid dam characteristics.

Figure 8 is a cross-sectional view showing the portion of the liquid-absorbent expansion retaining dam taken along the line C-C of Figure 7.

Figure 9 is a schematic illustration of another super gas permeable absorbent article having a first through hole and a circular liquid swellable dam dam feature surrounding the first through hole in accordance with the present invention.

Figure 10 is a schematic illustration of another super-breathable absorbent article having a first through-hole and a semi-circular liquid-absorbent expansion barrier dam feature in accordance with the present invention.

Figure 11 is a schematic illustration of another super-breathable absorbent article having a first through-hole and a guide groove feature in accordance with the present invention.

Figure 12 is a cross-sectional view of the selective gas permeable structure taken along line BB of Figure 1. Figure 13 is a schematic view of another super gas permeable absorbent article according to the present invention, in which two first through holes are shown to share a single leaky absorbent body having two second through holes therein. . Figure 14 is a front elevational view of a super-permeable diaper having a leak-proof absorbent body prior to wearing in accordance with the present invention.

Figure 15 is a front elevational view of the super air permeable diaper of Figure 14 after it has been worn.

Figure 16 is a rear elevational view of the super air permeable diaper of Figure 14 after it has been worn. Description of the reference numerals

1: liquid-permeable or liquid-impermeable underlayer of absorbent articles

2: liquid permeable top layer

3: absorber layer

4: Anti-leakage shield

5: elastic parts

6: Connector

7: The absorber covers the bottom layer

8: the bottom layer of the peripheral area

9: Selective venting structure

10: first through hole

1 1: Leakage absorber

12: Absorbent expansion retaining dam

13: Guide channel

14: Liquid-permeable or liquid-impermeable bottom layer of the leak-proof absorbent body

15: Surface contact layer

16: Liquid swellable structure

17: second through hole

18: first through hole encapsulation layer

19: Longitudinal front end of the absorber

20: Longitudinal rear end of the absorber

21: Additional liquid permeable material or structure

22: a water permeable material or structure constituting a liquid absorbing expansion retaining dam

23: second through hole encapsulation layer

24: third through hole encapsulation layer 25: fourth through hole encapsulation layer embodiment

The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the drawings in the present specification are only used to explain the principle of operation of some of the techniques related to the present invention, and the size, shape, and the like are not in a one-to-one correspondence or a strictly proportional relationship in the strict sense. Based on the techniques described in the present invention, a variety of different super-breathable absorbent articles can be designed, and the illustrations show only some of the possible solutions in all of the embodiments that may be implemented in accordance with the techniques described herein.

The object of the present invention is to provide a super breathable absorbent article, especially a feminine hygiene product (such as a sanitary napkin), an infant diaper, a diaper, a trousers, an adult care product, and a care product for pets and other animals. Wait.

Figure 1 shows a super gas permeable absorbent article in accordance with the present invention. The absorbent article comprises a liquid permeable topsheet 2 adjacent to the body surface of the user, a liquid permeable or liquid impermeable backsheet 1 attached to the absorbent article of the bed or clothing, and a liquid permeable top layer 2 and An absorbent layer 3 between the liquid-permeable or liquid-impermeable underlayer 1 of the absorbent article that absorbs liquid and has liquid retention. In addition, optionally, a flow guiding layer, a shaping structure, and the like disposed between the liquid permeable top layer 2 and the liquid permeable or liquid impermeable backing layer 1 of the absorbent article may be included (not shown) Out).

The liquid permeable top layer 2 may include, but is not limited to, an "inner layer" as described in patent 200680055017.0. As disclosed in the patent 200680055017.0, "the inner facing layer refers to the layer of liquid permeable material forming the inner coating of the absorbent garment, and in use the inner facing layer is in a position directly in contact with the wearer's skin. The inner facing layer may comprise Non-woven materials, such as spunbond, meltblown, carded, hydro-needle, wet-laid, etc. Suitable non-woven materials can be made from natural fibers such as wood pulp or cotton fiber, rayon such as polyester, polyethylene, Polypropylene, viscose, rayon, etc. or made of a mixture of natural and man-made fibers. The inner layer material can also be made of flax fibers which can be bonded to each other in a bonding model, such as EP-A. -1035818. Also disclosed as an inner layer material is a porous foam, a porous plastic film, etc. The material suitable for the inner layer should be soft, non-irritating to the skin and directly permeable to body fluids such as urine or other body fluids. The top layer can also be different in different parts of the absorbent article. The liquid permeable or liquid impermeable backsheet 1 of the absorbent article may include, but is not limited to, an "outer layer" as described in patent 200680055017.0. As disclosed in the patent 200680055017.0, "the outer layer refers to the material that forms the outer cover of the absorbent garment. The outer layers may be the same or different at different locations of the absorbent article. At least the outer layer of the absorbent core comprises a liquid impervious material. Plastic film such as polyethylene or polypropylene film, non-woven material with liquid-impermeable material coating, hydrophobic non-woven material for preventing liquid penetration, or laminated film of plastic film and non-woven material. The outer layer material is breathable so that The vapor is discharged from the absorbent core while still preventing liquid from passing therethrough. Examples of breathable outer layer materials are porous polymeric films, spunbonded and meltblown nonwoven laminates, and porous polymeric films and nonwoven materials. Tableting. Preferably, the outer layer comprises a nonwoven material on at least the surface facing the undergarment."

The absorbent layer 3 includes, but is not limited to, the "absorbent core" described in the patent 200680055017.0, and may also consist of the absorbent core and the wrapper bag described in the patent 200680055017.0 or other packages comprising at least one side of a water permeable material. The "absorbent core" described in the patent 200680055017.0 is an absorbent structure disposed between two facing layers of at least the crotch portion of the absorbent article.

As disclosed in the patent 200680055017.0, "the absorbent core can be of any conventional type. Examples of commonly occurring absorbent materials are cellulosic fluff pulp, fabric layers, superabsorbent polymers (so called superabsorbents), absorbent foams, Absorbent nonwoven material or the like. Cellulose fluff pulp is usually combined with a superabsorbent polymer in an absorbent core. Superabsorbent polymer is a water-swellable, water-insoluble organic or inorganic material that absorbs At least about 20 times by weight of an aqueous solution containing 0.9% by weight of sodium chloride. Organic materials suitable for use as superabsorbent materials may include natural materials such as polysaccharides, polysaccharides and the like, and synthetic materials such as synthetic hydrogels. The synthetic hydrogel polymer includes, for example, an alkali metal polyacrylate, polyacrylamide, polyvinyl alcohol, polyacrylic acid, polyacrylamide, polyvinylpyrene, and the like. Other suitable polymers Including hydrolyzed acrylonitrile grafted starch, acrylic acid grafted starch, and isobutylene maleic acid copolymerization and mixtures thereof. The gel polymer is preferably lightly crosslinked to render the material substantially water insoluble. Preferably, the superabsorbent material is further surface crosslinked so as to superabsorb the outer surface of the particles, filaments, sheets, spheres, etc. or the inner phase of the shell and superabsorbent. The ratio has a higher crosslink density. The superabsorbent material can be any shape suitable for the absorbent composition including granules, filaments, sheets, spheres, and the like. Alternatives or similar materials having superabsorbent polymer or superabsorbent functions also include materials that swell upon contact with a liquid as described in the invention disclosed in CN 1269710 A, and functionally similar materials may also be used in the block. a leakage absorbent body, the ring hole thickening leakage structure, the liquid absorption expansion barrier dam, the selective gas permeable structure, and the absorbent body layer of the absorbent article as a main component of the liquid swellable structure, the type of material Included (not as a limiting example) are: polymers such as crosslinked acrylic acid and copolymers thereof, especially all or part of salts of alkali metals, alkaline earth metals and aluminum, zinc and iron salts, and, for example, poly(a) Acrylic acid), polyacrylamide, poly(N,N-dimethylacrylamide) and polymethacrylamide;

Crosslinked polyvinylpyrrolidone; especially those copolymers of polyvinylpyrrolidone comprising polyvinyl acetate; polymethyl-, polyethyl-, polybutyl-vinyl ether and copolymers derived from vinyl ether, for example a copolymer of methyl vinyl ether and maleic anhydride or maleic acid; a polyethylene oxide having a molecular weight of from about 100,000 to 8,000,000;

Natural raw materials of polysaccharides (gelatin) and their semi-synthetic derivatives (such as alginic acid and its salts, agar, locust bean gum, carrageenan, gelatin, starch) and cellulose derivatives (such as carboxymethyl fiber) And cellulose acetate, pectin, guar gum, xanthan gum);

As disclosed in the patent 200680055017.0, "providing high liquid storage capacity by using a large amount of absorbent material. For an absorbent core comprising a hydrophilic filament (such as a filament) matrix and a superabsorbent material, the weight ratio of the superabsorbent material is preferably Between 10% and 90%, more preferably between 30% and 70%. It is conventional for absorbent garments to have an absorbent core comprising layers of different properties corresponding to liquid absorption capacity, liquid dispensing capacity and storage capacity. Thin absorbent bodies commonly used in baby diapers and incontinence protective garments typically include extruded, mixed or layered structures of fiber fluff pulp and superabsorbent polymers. The size and absorbent capacity of the absorbent core can be varied to suit different applications, such as Infant or adult incontinent". As disclosed in the patent 200680055017.0, "the absorbent core may also comprise a top portion of the main absorbent body. A distribution layer is provided which is adapted to quickly receive and temporarily store the exudate before it is absorbed by the primary absorbent core. The resulting distribution layer is well known in the art and can be composed of a porous fiber mat or foam material.

The liquid permeable top layer 2 of the absorbent article may be a single piece or a plurality of separate pieces may be combined by direct or indirect means. Each sheet may be composed of a layer of liquid permeable non-woven fabric, or may be one or more layers of liquid permeable non-woven fabric combined with other liquid permeable components, or composed of other liquid permeable materials;

The liquid permeable topsheet 2 and the liquid permeable or liquid impermeable backsheet 1 of the absorbent article may also be referred to as a topsheet and a backsheet, respectively. Further, the liquid-permeable top layer 2 and the liquid-permeable or liquid-impermeable back sheet 1 of the absorbent article are not necessarily one-layer structures, respectively, and may be composed of a plurality of layers of materials.

Specifically, the liquid-permeable or liquid-impermeable underlayer 1 of the absorbent article may be a whole piece or a plurality of separate pieces combined by direct or indirect means. Each piece can be composed of PE film, PP film, non-liquid permeable non-woven fabric and other liquid-permeable or liquid-impermeable materials, or it can be made of one or more PE films, PP film, non-liquid permeable non-woven fabric. Cloth, liquid permeable non-woven fabric combined with other non-liquid permeable materials.

In the case where the absorbent article is unfolded, the absorbent body layer 3 can be regarded as occupying a cuboid imaginary space having a volume of a certain length, width, and thickness in a state in which it is naturally not deformed, and the length direction thereof is set. In the longitudinal direction, the width direction is set to the lateral direction, and the direction perpendicular to the longitudinal and lateral directions is set to the thickness direction of the absorber layer 3.

The super gas permeable absorbent article shown in Fig. 1 does not have a leakage preventing screen on both sides. Alternatively, however, the absorbent article may include an anti-leakage shield disposed on either side of the longitudinal center plane of the absorbent article to prevent side leakage. The material and structure of the anti-leakage screen can be the same as those of the anti-leakage screen used in absorbent articles such as diapers in the prior art.

Optionally, the liquid permeable top layer 2, or the liquid permeable or liquid impermeable bottom layer 1 of the absorbent article, or the liquid permeable top layer 2 and the liquid permeable liquid of the absorbent article The liquid-impermeable backsheet 1 is connected to the elastic member 5 and the connecting member 6 by a direct or indirect connection at its own longitudinal end edges. The connector 6 can take any suitable form, such as a bond, a fastener or a tie, to enable the liquid permeable topsheet 2 or the liquid permeable or liquid impermeable backsheet 1 of the absorbent article to It is connected at both ends of its longitudinal direction or its extension, and is wrapped around the waist of the user. Thus, the absorbent article and The user's body surface surrounds an approximately enclosed space that stores excrement and prevents excretion from leaking out.

The liquid-permeable or liquid-impermeable backsheet 1 of the absorbent article has a projected surface area in the thickness direction of the absorbent article greater than or equal to a projected surface area of the absorbent body layer 3 in the thickness direction of the absorbent article. The surface of the liquid-permeable or liquid-impermeable backsheet 1 of the absorbent article may be divided into two parts, a part of which covers the bottom layer 7 with the absorber covering the absorbent layer 3 of the absorbent article, and A portion is the bottom layer 8 of the peripheral region which does not cover the absorber layer 3.

In the prior art, it is difficult to ensure that the absorbent article has good gas permeability without leaking. Since the entire outer surface adjacent to the garment has a bottom layer, the material of the bottom layer is used more, and the gas permeability of the bottom layer is generally poor, resulting in poor gas permeability of the absorbent article. A very intuitive idea is to open the hole in the bottom layer to improve its gas permeability, so that the breathability of the absorbent article can be greatly improved, but it is easy to cause leakage of body fluids and other contaminants. Therefore, how to further prevent bodily fluid outflow on the basis of open-hole ventilation is one of the basic starting points of the present invention.

As shown in Fig. 1, in the super gas permeable absorbent article of the present invention, in order to improve the gas permeability, a first through hole 10 is provided therein. At the same time, in order to prevent leakage of body fluids and other contaminants from the first through hole 10, a leaky absorbent body 11 on the liquid permeable top layer 2 is further provided at a portion where the first through hole 10 is provided. The leaky absorbent body 11 has a second through hole 17 that communicates with the first continuous perforation 10. In addition, a selective gas permeable structure 9 is also shown in FIG. The specific structural form of the leak-proof absorbent body 11 and the selective gas permeable structure 9 will be described in detail later.

It should be understood that the number and positional distribution of the leaky absorbent body 11 and the selective gas permeable structure 9 shown in Fig. 1 are both schematic. The invention is not limited to the specific case shown in Fig. 1 as an example. For example, in the super air permeable absorbent article of the present invention, only one of the leaky absorbent body 11 and the selective gas permeable structure 9 may be provided, or both of the structural features may be included. The position at which each of the leak-proof absorbent body 11 and the selective gas permeable structure 9 is disposed may be either at a region where the absorber layer 3 is provided or outside a region where the absorber layer 3 is provided. The number of each of the leaky absorbent body 11 and the selective gas permeable structure 9 is not limited, and may be one or plural, for example, 2, 3, 4, 5, 6, and 7. 8, and so on.

The liquid permeable or liquid impermeable bottom layer of the leaky absorbent body when the leaky absorbent body is disposed on the bottom layer of the peripheral region of the absorbent article that does not have the absorbent body layer Bonding, hot pressing, locking, directly surrounding the peripheral region of the first through-hole with the liquid-permeable or liquid-impermeable underlayer of the absorbent article in a peripheral region surrounding the second through-hole Ultrasonic or sewing method is combined as a combination; at the same time, the liquid-permeable or liquid-impermeable bottom layer of the leak-proof absorbent body surrounds the peripheral region of the second through hole and the leak-proof absorption The surface contact layer of the body is directly bonded by bonding, hot pressing, locking, ultrasonic or sewing in a peripheral region surrounding the second through hole or by bonding and heating with the second through hole encapsulating layer respectively Compressing, locking, ultrasonic or sewing, etc., thereby encapsulating the material, structure, and the like wrapped in the leakage-receiving body penetrated by the second through-hole in the leakage-receiving body, and Avoid body Leakage through the first through-hole and the second through-hole.

Alternatively, or in addition, other leak-proof structures such as a ring-hole thickened leak-proof structure, a liquid-absorbent expansion barrier dam, a guide groove, and the like may be employed. These will be described in detail later.

In order to achieve the effect of venting, leaking or venting without leaking, the present invention may adopt one of the following ways or any combination of the above, or may be a variety of ways based on the following ways, Or other embodiments designed in accordance with the technical solutions described in the claims. In addition, for the sake of brevity, in the respective embodiments, only the focus is described in detail, and the description of other common features is omitted. That is, the features described in one embodiment or elsewhere in the specification are equally applicable to other embodiments, unless otherwise stated.

Embodiment 1 :

In this embodiment, the leakage absorbent body in the absorbent article of the present invention and its manner of bonding with the absorbent body layer will be described in conjunction with the related drawings.

As shown in FIG. 1, one or more first through holes 10 are provided in the absorbent article, and the first through holes 10 are permeable or impermeable from the liquid permeable top layer 2 to the absorbent article. The liquid bottom layer 1 penetrates the absorbent article. Through the first through hole 10, the outside air can directly reach the enclosed space of the absorbent article and the body, thereby accelerating the moisture in the enclosed space to be discharged outside the closed space. The first through hole 10 may be disposed in any region of the absorbent article in which the liquid permeable or liquid impermeable backsheet 1 of the absorbent article is present.

Preferably, the first through hole 10 is disposed in a region of the absorbent article that is not directly opposite to a portion of the user's urine, liquid, or the like, where the liquid excretion is away from the body, so as to prevent the dirty liquid from directly from the The first through hole 10 leaks outside. Preferably, one or more of the first through holes 10 may be provided in an area prone to diaper rash, such as an area of the absorbent article located near the anus, the groin, the buttocks, etc.; or dirt (including dirt) An area that is not easily accessible directly, such as the longitudinal end regions of the absorbent article (as shown in Fig. 1, the longitudinal front end 19 of the absorbent body and the longitudinal rear end 20 of the absorbent body).

Preferably, the first through hole 10 is provided in an area where urine or the like cannot be directly reached after leaving the body.

In addition, in many cases, such as for two months or older babies and adults, most users only have one or two bowel movements per day, and they are more regular, so they can be used during the two bowel movements. An absorbent article having one or more first through holes 10 is provided in the vicinity of the anus or in the vicinity of the anus to improve the air permeability of the absorbent article, reduce the prevalence of diaper rash of the user, and protect the skin. Further, since the first through hole 10 provided at the groove portion is less likely to be blocked by the user's body, it is more advantageous to increase the air permeability of the absorbent article.

In order to prevent leakage of bodily fluids or the like through the first through hole 10, a space is provided between each of the first through holes 10 between the liquid permeable top layer 2 adjacent to the body surface side of the user and the user's body surface. The leaky absorbent body 11 is, for example, as shown in Fig. 1 . Or alternatively, a leaky absorbent body 11 is provided in common at a group (i.e., a plurality of adjacent ones) of the first through holes 10, for example, as shown in Fig. 13. Each of the leak-proof absorbent bodies 11 includes a liquid-permeable or liquid-impermeable backsheet 14 of the leak-proof absorbent body, and the liquid-permeable or liquid-impermeable backsheet 14 with the leak-proof absorbent body. a surface contact layer 15 having the same or similar shape, and a liquid swellable structure 16 is encapsulated between the liquid permeable or liquid impermeable back layer 14 of the leak absorbing body and the surface contact layer 15, for example, 3, 5, 6 are shown.

The liquid-permeable or liquid-impermeable backsheet 14 and the surface contact layer 15 of the leak-proof absorbent body 11 are small pieces compared to the absorber layer 3. The size of the liquid-permeable or liquid-impermeable backsheet 14 and the surface contact layer 15 of the leak-proof absorbent body is not particularly limited as long as it can surround The first through hole 10 can block the leakage of liquid from the first through hole 10 after the liquid absorbing expansion.

One (for example, as shown in FIGS. 2, 3, 5, and 6) or a group (for example, as shown in FIG. 13) penetrating through the leaky absorbent body 11 is reserved or provided on the leak-proof absorbent body 11. The second through hole 17 penetrates the liquid-permeable or liquid-impermeable back layer 14 of the leak-proof absorber, the surface contact layer 15 and the liquid-swellable structure 16 .

According to an embodiment of the present invention, the liquid permeable top layer 2 of the absorbent article and the liquid permeable or liquid impermeable bottom layer 1 of the absorbent article may be around the first through hole 10. The regions are directly joined to thereby penetrate the first through-hole 10 between the liquid-permeable top layer 2 and the liquid-permeable or liquid-impermeable backsheet 1 of the absorbent article. Other structures, components, and the like are encapsulated between the liquid permeable topsheet 2 and the liquid permeable or liquid impermeable backsheet 1 of the absorbent article, as shown in Figure 4b.

Alternatively, at the first through hole 10, the liquid pervious or liquid-impermeable first through-hole encapsulation layer 18 formed by one or more sheets may be passed through the absorbent article, and the liquid permeable layer The liquid-permeable or liquid-impermeable backsheet 1 of the absorbent topsheet and the absorbent article are respectively joined at a peripheral region of the first through-hole 10, thereby placing the absorbent article on the liquid-permeable top layer 2 and other structures, components, and the like interposed between the liquid-permeable or liquid-impermeable underlayer 1 of the absorbent article by the first through-hole 10 are encapsulated in the liquid-permeable top layer 2 and the absorbent Between the liquid permeable or liquid impermeable backsheet 1 of the article and the first through hole encapsulation layer 18, as shown in Figure 4a.

Preferably, the first through-hole encapsulation layer 18 has a pleated structure. Preferably, the first through-hole encapsulation layer 18 is made of a liquid-impermeable material such as ethylene, polyethylene plastic, a liquid-impermeable non-woven fabric, a polyethylene or polypropylene film, and a non-liquid-permeable material coating. A spun material, a hydrophobic nonwoven material that prevents liquid permeation, or a laminate of a plastic film and a nonwoven material.

The liquid-permeable or liquid-impermeable backsheet 14 and the surface contact layer 15 of the leak-proof absorbent body 11 may be bonded, heat-pressed, latched, and ultrasonically in a peripheral region of the second through-hole 17 The other methods are directly combined, as shown in Figure 5.

Alternatively, in the leak-proof absorbent body 11, the liquid pervious or not of the leak-proof absorbent body 11 may be respectively passed through one or more of the second through-hole encapsulating layers 23 combined with each other. The liquid permeable underlayer 14 and the surface contact layer 15 are bonded in the peripheral region of the second through hole 17 by bonding, hot pressing, locking, ultrasonic, sewing, etc., so as to be located in the leak-proof absorption a material, a structure, or the like of the leaky absorber 1 1 between the liquid-permeable or liquid-impermeable backsheet 14 and the surface contact layer 15 penetrated by the second through hole 17 is encapsulated in the body The surface contact layer 15, the liquid-permeable or liquid-impermeable backsheet 14 of the leak-proof absorber and the second through-hole encapsulation layer 23 are as shown in Fig. 6a.

Preferably, the second through-hole encapsulation layer 23 has a pleated structure. Preferably, the second through-hole encapsulation layer 23 is made of a liquid-impermeable material such as ethylene, polyethylene plastic, a liquid-impermeable non-woven fabric, a polyethylene or polypropylene film, and a non-liquid-permeable material coating. A spun material, a hydrophobic nonwoven material that prevents liquid permeation, or a laminate of a plastic film and a nonwoven material.

Preferably, the first through hole 10 and the second through hole 17 are the same size or shape, and the first through hole 10 and the second through hole 17 completely coincide or nearly coincide in spatial arrangement. .

The liquid permeable top layer 2 of the absorbent article and the leaky absorbent body 11 may be in a peripheral region of the first through hole 10 and a peripheral region of the second through hole 17 The liquid permeable underlayer 14 is directly bonded together by bonding, hot pressing, crimping, ultrasonic waves, etc., as shown in FIG.

Alternatively, a cylindrical through-hole encapsulation layer 24 formed of one or more sheets may be used, and one end of the third through-hole encapsulation layer 24 and the leak-proof absorber 1 1 described above may be used. The liquid-permeable or liquid-impermeable backsheet 14 is bonded to the peripheral region of the second through hole 17 by bonding, hot pressing, locking, ultrasonic, sewing, etc., and the third through-hole encapsulating layer 24 is The other end is bonded to the peripheral region of the first through hole 10 with the liquid permeable top layer 2 of the absorbent article by means of bonding, hot pressing, locking, ultrasonic, sewing or the like. As shown in Figure 6b.

Preferably, the third through-hole encapsulation layer 24 has a pleated structure.

Preferably, the third through-hole encapsulation layer 24 is made of a liquid-impermeable material such as ethylene, polyethylene plastic, a liquid-impermeable non-woven fabric, a polyethylene or polypropylene film, and a non-liquid-permeable material coating. A spun material, a hydrophobic nonwoven material that prevents liquid permeation, or a laminate of a plastic film and a nonwoven material is formed into a barrel structure having open ends. In addition, the direct bonding manner described above and the respective bonding manner by means of the through-hole encapsulation layer may be used singly or in combination.

The upper and lower surfaces of the periphery may be combined at least one of the first through hole 10 and the second through hole 17 by using a direct bonding manner and/or a separate bonding manner, and then by direct bonding and/or separately combining The leaky absorbent body 11 is combined with an absorbent article. For example, in the embodiment shown in FIG. 2, the liquid permeable top layer 2 of the absorbent article and the liquid permeable or liquid impermeable backsheet 1 of the absorbent article are in the first through hole 10 The peripheral region and the first through-hole encapsulation layer 18 are respectively packaged, and the liquid-permeable underlayer 14 and the surface contact layer 15 of the leakage-receiving body 11 are in a peripheral region of the second through-hole 17 and a second through-hole. The encapsulating layers 23 are respectively combined and packaged, and then the leaky absorbent body 11 is bonded to the liquid-permeable top layer 2 of the absorbent article by direct bonding. Corresponding to the manner of respectively combining + respectively combining + direct bonding in the embodiment shown in FIG. 2, in the embodiment shown in FIG. 5, direct bonding + direct bonding + direct bonding is adopted; in FIG. 6b In the embodiment, the combination of +, respectively, and + respectively is used.

In addition, the liquid-permeable or liquid-impermeable backsheet 1 and the liquid-permeable or liquid-impermeable underlayer 14 and the surface of the absorbent article of the absorbent article, which are not separately applied to the liquid-permeable top layer 2 of the absorbent article and the absorbent article 11, may also be used. In the case where the contact layer 15 is bonded (or only one of them is bonded), the package bonding of them is simultaneously achieved by means of one through-hole encapsulation layer. This will be described in conjunction with Fig. 3 in the following embodiment 3.

Embodiment 2:

In this embodiment, the manner in which the leak-proof absorbent members in the absorbent article of the present invention are joined by the crimping structure will be mainly described.

One or more first through holes 10 are provided in the above absorbent article, and the first through hole 10 penetrates from the liquid permeable top layer 2 to the liquid permeable or liquid impermeable bottom layer 1 of the absorbent article Absorbent items. Through the first through hole 10, the outside air can directly reach the enclosed space of the absorbent article and the body, thereby accelerating the discharge of moisture in the enclosed space to the outside of the body.

In order to prevent body fluids and the like from leaking through the first through hole 10, between the liquid permeable top layer 2 close to the body surface side of the user and the user's body surface, each (for example, as shown in FIG. 1) or one The first through hole 10 of the group (for example, as shown in FIG. 13) is provided with a leaky absorbent body 11, Each of the leak-proof absorbent bodies 11 includes a liquid-permeable or liquid-impermeable backsheet 14 of the leak-proof absorbent body, and a surface contact layer 15 having the same or similar outer shape as the liquid-permeable or liquid-impermeable backsheet 14. A liquid swellable structure 16 (shown in Figures 2, 5, 6) is disposed between the liquid permeable or liquid impermeable backsheet 14 and the surface contact layer 15.

One (for example, as shown in FIGS. 2, 3, and 5) or a group (for example, as shown in FIG. 13) penetrating through the leaky absorbent body 11 is reserved or disposed on the leaky absorbent body 11. The through-hole 17 penetrates the liquid-permeable or liquid-impermeable backsheet 14 of the leak-proof absorber, the surface contact layer 15 and the liquid-swellable structure 16.

The absorbent article and the leak-proof absorbent body 11 are in the first through hole 10 by a crimping structure (not shown in the drawings) penetrating the first through hole 10 and the second through hole 17 It is tightly coupled to the peripheral region of the second through hole 17. Wherein the liquid permeable top layer 2 of the absorbent article is in the peripheral region of the first through hole 10 and the liquid permeable or liquid impermeable bottom layer 14 of the leaky absorbent body 11 The peripheral regions of the second through holes 17 are tightly coupled.

Preferably, the inner surfaces of the first through hole 10 and the second through hole 17 are sealed in the buckle structure.

The buckle structure may be a flexible or rigid structure. As an example, a snap, a rivet (e.g., a garment rivet or a shoe rivet) may be employed as the crimping structure. Preferably, the buckle structure adopts a flexible structure.

Embodiment 3:

In this embodiment, the liquid-permeable top layer 2 of the absorbent article and the liquid-permeable or liquid-impermeable backsheet 1 and the leak-proof absorbent body 11 of the absorbent article are not separately permeated or combined with the related drawings. In the case where the liquid-impermeable underlayer 14 and the surface contact layer 15 are bonded, encapsulation and bonding thereof are simultaneously achieved by means of a through-hole encapsulation layer.

One or more first through holes 10 are provided in the above absorbent article, and the first through hole 10 penetrates from the liquid permeable top layer 2 to the liquid permeable or liquid impermeable bottom layer 1 of the absorbent article Absorbent items. Through the first through hole 10, the air outside the body can be directly reached The absorbent article and the enclosed space of the user's body accelerate the drainage of moisture in the enclosed space to the outside of the enclosed space.

In order to prevent body fluids and the like from leaking through the first through hole 10, between the liquid permeable top layer 2 close to the body surface side of the user and the user's body surface, each (for example, as shown in FIG. 1) or one The first through hole 10 of the group (for example, as shown in FIG. 13) is provided with a leaky absorbent body 11, each of which includes a liquid permeable or liquid impermeable bottom layer 14, and the liquid permeable or The surface contact layer 15 having the same or similar outer shape of the liquid-impermeable backsheet 14 encloses the liquid-swellable structure 16 between the liquid-permeable or liquid-impermeable backsheet 14 and the surface contact layer 15 (for example, FIGS. 3 and 5 , 6 shows).

One (for example, as shown in FIGS. 2, 3, 5, and 6) or a group (for example, as shown in FIG. 13) penetrating through the leaky absorbent body 11 is reserved or disposed on the leaky absorbent body 11. The second through hole 17 penetrates the liquid-permeable or liquid-impermeable back layer 14 of the leak-proof absorber, the surface contact layer 15 and the liquid-swellable structure 16 . Preferably, the first through hole 10 and the second through hole 17 are the same size or shape, and the first through hole 10 and the second through hole 17 completely coincide or nearly coincide in spatial arrangement. .

As shown in FIG. 3, a fourth through-hole encapsulation layer 25 formed by combining one or more sheets may be used to penetrate the first through-hole 10 of the absorbent article and the leak-proof absorbent body 11 a second through hole 17 , and one end of the fourth through hole encapsulating layer 25 and the surface contact layer 15 of the leaky absorbent body 11 are bonded at a peripheral region of the second through hole 17 , Combining heat pressing, locking, ultrasonic, sewing, etc., and bonding the other end of the fourth through-hole encapsulation layer 25 to the absorbent article by bonding, hot pressing, locking, ultrasonic, sewing, or the like The liquid-permeable or liquid-impermeable backsheet 1 is bonded in a peripheral region of the first through-hole 10; the liquid-permeable top layer 2 of the absorbent article is in a peripheral region of the first through-hole 10 a portion of the liquid-permeable or liquid-impermeable backsheet 14 of the leak-proof absorbent body 11 in the peripheral region of the second through-hole 17 or a portion of the fourth through-hole encapsulation layer 25 Combine so that the absorbent article is The structure and components through which the first through hole 10 penetrates and the structure, composition, and the like of the leaky absorbent body 11 penetrated by the second through hole 17 are encapsulated.

Preferably, the fourth through-hole encapsulation layer 25 may have a pleated structure. Preferably, the fourth through-hole encapsulation layer 25 is made of a liquid-impermeable material such as ethylene, polyethylene plastic, a liquid-impermeable non-woven fabric, a polyethylene or polypropylene film, and a non-liquid-permeable material coating. A spun material, a hydrophobic nonwoven material that prevents liquid leakage, or a laminated sheet of a plastic film and a nonwoven material.

Since the absorbent article of the present invention can directly exchange gas with the outside, the moisture characteristics of the absorbent article and the human body are closed and the contact area is greatly improved, so that the surface of the user's skin is more dry and comfortable. At the same time, the leaky absorbent body 11 is provided on the inner surface of the first through hole 10 for blocking the leakage of body exudates to the area outside the through hole. When there is no excrement, the leaky absorbent body 11 is in a dry small volume state to make it comfortable to wear; and when the excrement reaches the vicinity of the first through hole 10, due to the leaky absorbent body 11 The liquid swell expands to form a barrier around the first through hole 10 and the second through hole 17, so that leakage of body fluid can be reliably prevented. Further, after the leak-proof absorbent body 11 is swelled and expanded, the body surface is only in contact with the portion of the expanded leaky absorbent body 11, and voids may be formed at other portions, SP, compared with the conventional absorbent article. The entire surface contact of the liquid-permeable top layer portion of the absorbent article with the human body surface becomes contact with only a small wet area, thereby greatly improving the surface environment and reducing diaper rash and dermatitis. And the odds of other illnesses.

In the embodiment 1-3, the liquid-permeable or liquid-impermeable underlayer 14 of the leak-proof absorbent body has the same or similar outer shape as the surface contact layer 15, and may be a triangle, a circle, or a parallelogram. A combination of various shapes or shapes of a combination of line segments and arcs.

The second through hole 17 may be provided at any portion of the leaky absorbent body 11. Preferably, the second through hole 17 is located at a geometric center of the leaky absorbent body 11 or a peripheral region surrounding the geometric center.

The liquid-permeable or liquid-impermeable backsheet 14 of the leak-proof absorbent body 11 may include: a liquid permeable nonwoven material such as spunbond, meltblown, carded web, hydraulic needle punching, wet forming, etc. Materials; other liquid permeable structures, such as porous foam, porous plastic film; water-absorbing materials, such as absorbent paper materials. Suitable nonwoven materials can be made from natural fibers such as wood pulp or cotton fibers, rayon fibers such as polyester, polyethylene, polypropylene, viscose, rayon, etc. or from a mixture of natural and man-made fibers, as disclosed in patent 200680055017.0. to make. Liquid permeable bottom layer Made of flax fibers, which can be bonded to each other in a bonding model, such as

Published in EP-A-1035818.

Preferably, the liquid-permeable or liquid-impermeable backsheet 14 of the leak-proof absorbent body 11 may be a hydrophilic stretchable nonwoven fabric, and the surface contact layer 15 of the leak-proof absorbent body 11 A material such as a hydrophobic non-stretchable nonwoven fabric can be used.

The surface contact layer 15 of the leak-proof absorbent body 11 may be provided with a hydrophobic non-woven fabric or a surface of the surface of the user's body surface by bonding, hot pressing, locking, ultrasonic, sewing, or the like. Foam, mesh structure, etc., to improve the comfort and dryness of the skin.

The liquid swellable structure 16 of the leaky absorbent body 11 may be referred to as cellulose fluff pulp, fabric layer, superabsorbent polymer or superabsorbent having water swellable properties, absorbent foam, absorbent a structure composed of a nonwoven material or the like, or a mesh or wrap structure formed by a hydrophilic or hydrophobic nonwoven fabric, or a water absorbent paper material, or a combination of a partially hydrophilic material and a partially hydrophobic material A structure formed by a combination of components such as cellulose fluff pulp, fabric layer, superabsorbent polymer or superabsorbent, absorbent foam, absorbent nonwoven material or the like.

Preferably, the liquid swellable structure 16 of the leaky absorbent body 11 comprises a material and structure of a shaped structure employed in the absorbent body layer 3 of a conventional absorbent article to prevent the block. The liquid-absorbent material such as a polymer or a superabsorbent in the liquid-swellable structure 16 of the leaky absorbent body 11 moves over a wide range in the leak-proof absorbent body 11.

Preferably, when the water content of the liquid-swellable structure 16 reaches a certain degree of liquid absorption in the range of 1/100 to 2/3 of its liquid saturation, the liquid-swellable structure 16 naturally expands. The rear volume can block leakage of body fluids and the like from the first through hole 10 and the second through hole 17.

The liquid swellable structure 16 causes the leaky absorbent body 11 to expand in volume in a state of liquid absorption, but the expansion of the liquid swellable structure 16 does not damage the leaky absorbent body. 11.

Preferably, the liquid absorbing structural structure 16 provided in the peripheral region of the second through hole 17 of the leaky absorbent body 11 has a larger thickness than other regions away from the second through hole 17 a plurality of liquid swellable materials (such as a superabsorbent polymer or superabsorbent), or a structure having better liquid swellability, etc., such that the second through hole 17 The liquid swellable structure 16 in the peripheral region is in a state in which the liquid absorption saturation is equal to the liquid saturation of the liquid swellable structure 16 in the adjacent region of the peripheral region of the second through hole 17, The liquid-swellable structure 16 of the peripheral region of the two through-holes 17 has a greater thickness than the liquid-swellable structure 16 of the adjacent region. This can be referred to as a ring hole thickening leak feature. With such a ring-hole thickening leakage feature, it is possible to better prevent leakage of body fluid from the second through hole 17.

Embodiment 4:

In this embodiment, the ring-hole thickening leakage structure employed in the absorbent article of the present invention will be mainly described with reference to the related drawings.

One or more first through holes 10 are provided in the absorbent article, and the first through holes 10 pass through the liquid permeable top layer 2 to the liquid permeable or liquid impermeable bottom layer 1 of the absorbent article. Absorbent articles. Through the first through hole 10, the outside air can directly reach the enclosed space of the absorbent article and the user's body, thereby accelerating the moisture in the enclosed space to the outside of the body.

As shown in FIG. 4a, in order to prevent leakage of body fluid or the like through the first through hole 10, the absorber layer 3 in the peripheral region of the first through hole 10 is disposed to be adjacent to the other first The absorber layer 3 of the peripheral portion of the through hole 10 has a large thickness, a large amount of liquid swellable material (e.g., a superabsorbent polymer or a superabsorbent), or better liquid swellability and the like. This structural feature is called a ring-hole thickening leak-proof structure. The annular hole is thickened by the annular hole so that the peripheral region of the first through hole 10 has a liquid absorption saturation at a liquid absorption saturation that is less than or equal to a region adjacent to a peripheral region of the first through hole 10 In the state, the absorber layer 3 of the peripheral region of the first through hole 10 has a larger thickness than the absorber layer 3 of the adjacent region. In the case where the first through hole 10 is circular, after the liquid swell is expanded, the peripheral region of the first through hole 10 may be formed into a cylindrical stepped or conical structure. In other cases, if the through hole is rectangular, the absorber layer 3 that uniformly absorbs water forms a rectangular stepped state around the first through hole 10, preventing body fluid from the first Consistently piercing 10 leaks. Thereby, by such a ring-hole thickening leakage structure, leakage of body fluid from the first through hole 10 can be prevented.

In the case of having a ring-hole thickened leak-proof structure, the leak-proof absorbent body described in the foregoing embodiment may be omitted. Of course, the leakage absorbent body and the ring hole thickening leakage structure It can also be combined at the same time.

Embodiment 5:

In this embodiment, the liquid absorbing expansion barrier dam structure employed in the absorbent article of the present invention will be mainly described with reference to the related drawings.

One or more first through holes 10 are provided in the absorbent article, and the first through hole 10 passes through the liquid permeable top layer 2 to the liquid permeable or liquid impermeable bottom layer 1 of the absorbent article. Sexual items. Through the first through hole 10, the outside air can reach the enclosed space of the absorbent article and the body, thereby accelerating the moisture in the enclosed space to the outside of the body.

As shown in FIGS. 7, 9, and 10, in order to prevent leakage of body fluid or the like from the first through hole 10, a space is provided between the first through hole 10 and a body fluid such as urine or menstrual fluid leaving the body part of the user. Or a plurality of liquid absorbing expansion dams 12.

The liquid-absorbent expansion barrier dam 12 is comprised of a water permeable material or structure 22 (such as a water permeable nonwoven fabric) and a liquid swellable structure 16 encased therein, the liquid swellable structure 16 comprising pulp, cotton Such as fibers and materials having liquid absorbing properties, such as high (super) absorbent polymers.

The water permeable material or structure constituting the liquid absorption expansion barrier dam 12 may include: a liquid permeable non-woven material such as spunbond, melt blown, carded web, hydraulic needle punching, wet-laid, etc.; Other liquid permeable structures, such as porous foam, porous plastic film; water absorbing materials, such as absorbent paper materials. Suitable nonwoven materials can be made from natural fibers (such as wood pulp or cotton fibers), rayon fibers (such as polyester, polyethylene, polypropylene, viscose, rayon, etc.) or from natural and artificial, as disclosed in patent 200680055017.0. Made of a mixture of fibers. The liquid permeable material may also be made of flax fibers which are bonded to each other in a bonding mold, as disclosed in EP-A-1035818.

In the embodiment shown in FIG. 7, one side in the longitudinal direction of the liquid-absorbent expansion barrier dam 12 and its peripheral region are combined with the liquid-permeable top layer 2 of the absorbent article in a surface contact manner. Together.

In the dry state, the liquid-absorbent expansion barrier dam 12 is small in volume and soft in touch, and is in a crouching state on the outer surface of the liquid-permeable top layer 2 of the absorbent article, and does not cause obvious user Discomfort. The liquid-absorbent expansion barrier dam 12 is changed in volume after liquid absorption expansion Large, increased hardness, its internal high-absorbent polymer and other liquid swells, squeeze each other, form a dense impervious wall, prevent the body fluid from flowing directly to the first through hole 10 or / and guide the body fluid to other areas Preventing leakage of body fluid from the first through hole 10 .

In addition, as shown in FIG. 8, the liquid-absorbent expansion barrier dam 12 may also be made of a water-permeable material 22 (such as a water-permeable nonwoven fabric or the like) and a part of the surface of the liquid-permeable top layer 2 of the absorbent article or The boundary of the partial surface is combined to form a three-dimensionally closed leakage dam enclosure, and the liquid swellable structure 16 is encapsulated in the closed dam enclosure to form the liquid absorption expansion dam 12.

The boundary contour of the contact surface of the liquid-absorbent expansion barrier dam 12 and the liquid-permeable top layer 2 may be a polygonal line, a corrugated shape, a line segment, a circular shape, a semicircular shape, a cross line, or a combination of a line segment and a circular arc. The various shapes and the like formed are disposed between the first through hole 10 and a portion of the user's body fluid such as urine or menstrual fluid, or surround or partially or completely surround the first through hole 10, The function of blocking and drainage is to prevent leakage of body fluid from the first through hole 10 (as shown in FIGS. 7, 9, and 10).

The liquid-swellable structure 16 of the liquid-absorbent expansion barrier dam 12 may be referred to as cellulose fluff pulp, fabric layer, superabsorbent polymer or superabsorbent, absorbent foam, absorbent nonwoven material or a structure composed of an analog or the like; or a network or a wrap structure formed by a hydrophilic or hydrophobic nonwoven fabric, or a water-absorbent paper material, or a combination of a partially hydrophilic material and a partially hydrophobic material, wrapped by a cellulose fluff pulp A structure formed by a combination of components such as a fabric layer, a superabsorbent polymer or a superabsorbent, an absorbent foam, an absorbent nonwoven material or the like.

Preferably, the liquid-swellable structure 16 of the liquid-absorbent expansion barrier dam 12 comprises a material and structure of a shaped structure employed in the absorber layer 3 of the prior absorbent article to prevent the liquid-swelling The liquid-absorbent material such as a polymer or a superabsorbent in the liquid-swellable structure 16 in the liquid-repellent dam 12 moves over a wide range in the liquid-absorbent expansion barrier dam 12.

Preferably, when the water content of the liquid-swellable structure 16 reaches a certain degree of liquid absorption in the range of 1/100 to 2/3 of the liquid saturation amount, the liquid-swellable structure 16 naturally expands. The rear volume can block leakage of body fluid or the like from the first through hole 10 through the liquid absorption expansion barrier dam 12. The liquid-absorbent expansion barrier dam 12 is not damaged by the expansion of the liquid-swellable structure 16.

A surface area close to the surface of the user on the opposite side of the contact surface of the liquid-absorbent expansion barrier dam 12 with the liquid-permeable top layer 2 of the absorbent article may be bonded, heat-pressed, latched, and sewn. Ultrasonic non-woven fabrics or foams, mesh structures, etc. are combined with ultrasonic waves to improve the comfort and dryness of the surface of the user.

Embodiment 6:

In this embodiment, the flow guiding groove structure employed in the absorbent article of the present invention will be mainly described with reference to the related drawings.

One or more first through holes 10 are provided in the above absorbent article, and the first through hole 10 penetrates from the liquid permeable top layer 2 to the liquid permeable or liquid impermeable bottom layer 1 of the absorbent article Absorbent items. Through the first through hole 10, the outside air can directly reach the enclosed space of the absorbent article and the user's body, thereby accelerating the moisture in the enclosed space to the outside of the body.

As shown in FIG. 11, in order to prevent leakage of bodily fluids or the like from the first through hole 10, a space is provided between the first through hole 10 and a portion of the user's urine, menstrual fluid, and the like which are separated from the body. A plurality of flow guiding grooves 13. The guide groove 13 refers to a groove which acts as a guide flow formed at a certain portion of the surface of the liquid-permeable top layer 2 in a state in which the absorbent article is in a state in which the absorbent article is inflated. The guide groove 13 may be formed at a local position of the absorbent article by pressing, bonding, hot pressing, locking, sewing, ultrasonic wave, etc., for limiting the absorbent article after the liquid absorbing expansion The maximum distance between the liquid permeable topsheet 2 and the liquid permeable or liquid impermeable backsheet 1 of the absorbent article is less than a certain value. For example, the specific value can be a value between 0.1 mm and 30 mm. The specific value may also be a specific value less than or equal to the average thickness of the absorbent body layer 3 after the liquid absorbing expansion of the absorbent article.

Alternatively or additionally, at the portion of the absorbent article where the flow guiding groove 13 is required to be formed, in the absorbent body layer 3, a liquid swellable material having a smaller thickness than other portions may be used, or A small liquid swellable material, or a material and/or structure having a weak liquid swelling property, so that the height of the portion after the liquid absorbing expansion is smaller than the height of other portions, thereby forming a flow guiding groove. Of course, other methods capable of forming a flow guiding groove are also contemplated by those skilled in the art. And the method described above and other suitable methods may be used in combination such that certain portions of the surface of the liquid permeable top layer 2 of the absorbent article form a certain groove in the state of liquid swell expansion, as A diversion channel 13 for diversion.

The contour of the guide groove 13 on the surface of the liquid permeable top layer 2 may be a line shape, a corrugation shape, a line segment, a circle shape, a semicircular shape, a triangle shape, a quadrilateral shape, a line segment cross shape, or a line segment or an arc Various combinations of patterns and the like are provided between the first through hole 10 and the portion of the absorbent article user's urine, menstrual fluid, etc., which are separated from the body, or surrounded and partially or completely surrounded. The first through hole 10 serves to guide the body fluid from flowing into the first through hole 10, thereby preventing body fluid from leaking from the first through hole 10.

In the dry state, the volume of the flow guiding groove 13 is small and the touch is soft, and the outer surface of the liquid-permeable top layer 2 of the absorbent article is in an invisible state, which does not cause significant discomfort to the user.

After the liquid swell is expanded, the absorbent body layer 3 becomes thicker and thicker, and the hardness is increased. At this time, the expansion of the absorbent body layer 3 at the portion of the flow guiding groove 13 can be restricted by local bonding. Alternatively or additionally, by using a liquid swellable material having a different expansion coefficient, a different thickness and/or a different amount at the portion of the flow guiding groove 13 at the flow guiding groove 13 and the absorbent body The adjacent regions of layer 3 have different degrees of expansion under the same external conditions. Forming the flow guiding groove 13 in the liquid permeable top layer 2 of the absorbent article by any one of the above means or a combination thereof, thereby preventing the body fluid from directly flowing to the first through hole 10 and guiding the body fluid flow It penetrates into other areas, thereby preventing body fluid from leaking out of the first through hole 10.

In all embodiments of the present invention, the first through hole 10 may be a circular shape, a square shape, a diamond shape or a slit shape, or other various shapes formed by any combination of line segments and circular arcs. Preferably, the first through hole 10 is circular.

When the area of the first through hole 10 is larger than a certain size (for example, 0.05 square centimeter, of course, other sizes may be set as needed), a gas permeable structure such as a mesh or a yarn may be used to pass hot pressing and sticking. The absorbent article is joined to the periphery of the first through hole 10 and covers the through region of the first through hole 10 in a manner of knotting, crimping, ultrasonic or sewing to protect the privacy of the user. Preferably, the web material used is a hydrophobic material. In all embodiments of the present invention, the second through hole 17 may be a circular shape, a square shape, a diamond shape or a slit shape, or other various shapes formed by any combination of line segments and circular arcs. Preferably, the second through hole 17 is circular.

When the area of the second through hole 17 is larger than a certain size (for example, 0.05 square centimeter, of course, other sizes may be set as needed), a gas permeable structure such as a mesh or a yarn may be used to pass hot pressing and sticking. A junction, a crimping, an ultrasonic wave or the like is combined with the absorbent article at a periphery of the second through hole 17 and covers a through region of the second through hole 17 to protect the privacy of the user. Preferably, the web material used is a hydrophobic material.

In addition, it should be understood that the first through hole 10 and the second through hole 17 may each be covered with a mesh material, or the mesh material may be covered only on any one of them.

Alternatively, the liquid permeable top layer 2 and the liquid permeable or liquid impermeable underlayer 1 of the absorbent article may also be retained in the absorbent article at the area where the first through hole 10 is located. One or both, such that the first through hole 10 is only through the liquid permeable top layer 2 and/or the absorbent article of the absorbent article that is retained at the location a portion of the structure and material other than the liquid permeable or liquid impermeable backsheet 1; at the same time at the position of the first through hole 10, the liquid permeable top layer 2 retained and/or the liquid permeable or not A plurality of small holes, slits, and the like smaller than the first through holes 10 are provided in the liquid permeable underlayer 1 to form a mesh-like structure. In this way, it is also possible to achieve the purpose of venting while protecting the privacy of the user. This method is also applicable to the second through hole 17, and will not be described herein.

Further, the above-described method of covering the mesh material and opening the small holes may be used in combination. Embodiment 7:

In this embodiment, the selective gas permeable structure employed in the absorbent article of the present invention is mainly described in conjunction with the related drawings.

As shown in FIGS. 1 and 12, in the bottom layer 8 of the peripheral region of the absorbent article, the liquid-permeable or liquid-impermeable underlayer of the absorbent article at the bottom layer 8 of the peripheral region is 1 Locally bonding with the liquid permeable topsheet 2 or other liquid permeable material or structure (e.g., liquid permeable nonwoven fabric, etc.) to form a bonded region and a non-bonding region between the bonded regions. The unbonded area is surrounded by the bonding area to form a first enclosed space. A plurality of liquid swellable structures 16 are disposed inside the first enclosed space. In the first enclosed space The upper and lower surfaces are provided with a plurality of small holes, slits and the like penetrating through the inner and outer sides of the first closed space for ventilation. The first enclosed space is not destroyed by the expansion of the liquid-swellable structure 16.

Such a structural form as described above is referred to as a selective gas permeable structure 9.

In the selective gas permeable structure 9, the size of the small holes and slits is not particularly limited as long as the components of the liquid swellable structure 16 do not leak from the small holes, slits, etc. to the first Just outside the enclosed space. Preferably, for example, the orifice has a diameter of less than or equal to 2 mm.

The liquid permeable material or structure constituting the selective gas permeable structure 9 may include: a liquid permeable nonwoven material such as spunbond, melt blown, carded web, hydraulic needle punch, wet laid web, etc.; Liquid permeable structure, such as porous foam, porous plastic film; water absorbing material, such as absorbent paper material. Suitable nonwoven materials can be made from natural fibers such as wood pulp or cotton fibers, rayon fibers such as polyester, polyethylene, polypropylene, viscose, rayon, etc. or from a mixture of natural and man-made fibers, as disclosed in patent 200680055017.0. to make. The liquid permeable material or structure may also be made of flax fibers which are bonded to each other in a bonding mold, as disclosed in EP-A-1035818.

With such a structure, when there is no excrement reaching the region of the selective gas permeable structure 9 of the side flap, since the liquid swellable structure 16 inside the closed cavity is in a dry small volume state, There is space inside the closed cavity to complete the task of exchanging gases. When the body fluid reaches the inside of the closed cavity, the liquid swellable structure 16 inside the closed cavity absorbs and expands, and the small holes on both sides of the closed cavity and the selective gas permeable structure 9 The inside is sealed to prevent leakage of excrement.

Embodiment 8:

The selective gas permeable structure 9 disposed at the bottom layer 8 of the peripheral region of the absorbent article has been previously described. Alternatively or additionally, the selectively permeable structure 9 may also be provided at the location where the absorbent body of the absorbent article covers the bottom layer 7.

Specifically, in the absorbent body covering base layer 7 of the absorbent article, the liquid permeable or liquid-impermeable backing layer 1 of the absorbent article at the bottom layer 7 is covered by the absorbent body with the The liquid permeable topsheet 2 or another (i.e., additional) liquid permeable material or structure 21 is joined at a local location to form one or more selectively permeable structures 9. Selectivity The gas permeable structure 9 includes a second layer formed by the liquid permeable topsheet 2 or another liquid permeable material surrounded by the bonded location and the liquid permeable or liquid impermeable backsheet 1 of the absorbent article. Closed space. A plurality of small holes, slits and the like penetrating through the inner and outer sides of the second closed space are provided on the upper and lower surfaces of the second closed space for ventilation. The additional liquid permeable material or structure 21 for forming the selective gas permeable structure 9 may be a liquid permeable material or structure additionally added in addition to the liquid permeable top layer 2, or may be A portion of the liquid permeable top layer 2.

The junction points of the same second enclosed space are connected to form a closed curve.

A plurality of liquid swellable structures 16 are disposed inside the second closed space, and the second closed space is not damaged by the expansion of the liquid swellable structure 16.

The composition of the liquid-swellable structure 16 does not separate from the pores, the gap, and the liquid-permeable or liquid-impermeable underlayer 1 of the absorbent article with the liquid-permeable top layer 2 or another The liquid permeable material leaks to the outside of the second closed space at a portion where the local position is combined.

Further, although the foregoing describes the portion of the absorbent article covering the bottom layer 7, the liquid-permeable or liquid-impermeable backsheet 1 of the absorbent article and another liquid-permeable material or the liquid permeability The top layer 2 and the liquid-swellable structure 16 disposed therebetween form a selectively permeable structure 9, but alternatively, the structure of the liquid-permeable top layer 2 and the absorber layer 3 at the respective portions may be maintained, only for the The liquid permeable or liquid impermeable backsheet 1 is modified to form a selectively permeable structure 9 in the liquid permeable or liquid impermeable backsheet 1.

In Embodiments 7-8, the liquid swellable structure 16 of the selective gas permeable structure 9 may be referred to as cellulose fluff pulp, fabric layer, superabsorbent polymer or superabsorbent, absorbent foam, a structure composed of an absorbent nonwoven material or the like; or a network or a wrap structure formed by a hydrophilic or hydrophobic nonwoven fabric, or a water-absorbent paper material, or a combination of a partially hydrophilic material and a partially hydrophobic material. The structure is formed by a combination of components such as cellulose fluff pulp, fabric layer, superabsorbent polymer or superabsorbent, absorbent foam, absorbent nonwoven material or the like.

Preferably, when the water content of the liquid-swellable structure 16 reaches a certain degree of liquid absorption in the range of 1/100 to 2/3 of the liquid saturation amount, the liquid-swellable structure 16 naturally expands. The rear volume is capable of blocking the leakage of body fluids and the like from the selective gas permeable structure 9. The first enclosed space or the second enclosed space is not damaged by the expansion of the liquid-swellable structure 16.

With such a structure, when the excrement does not reach the space of the selective gas permeable structure 9, the liquid swellable structure 16 inside the first closed space and the second closed space is in a dry small volume state. The first enclosed space and the second enclosed space can complete the task of exchanging gases. When the body fluid reaches the inside of the first closed space and the second closed space, the liquid swellable structure 16 inside the first closed space and the second closed space absorbs and expands, and the first closed The space and the second enclosed space are filled, and the small holes or slits on both sides are sealed to prevent leakage of body fluid.

Figures 14-16 show a view of a super-breathable diaper wearing a leak-proof absorbent body in accordance with the present invention. The super air permeable diaper shown in Figures 14-16 has a structure similar to that shown in Figure 1, but without a selective gas permeable structure.

Some exemplary embodiments have been described above mainly by way of several super-breathable absorbent articles, which are merely representative examples for helping the reader understand the technical essentials of the present invention, and those skilled in the art will readily appreciate many modifications. It is possible. Therefore, the technical scope of the present invention should not be limited to the specific illustrated or illustrated examples, but should be included in the technical scope of the invention as defined by the appended claims.

Claims

Claim

An absorbent article having improved breathability, the absorbent article comprising a liquid permeable top layer proximate to a body surface of a user, a liquid permeable or liquid impermeable back layer, and a liquid permeable top layer And an absorber layer between the liquid permeable or liquid impermeable substrate, the absorber layer absorbing liquid and having liquid retention;

The projection surface area of the liquid permeable or liquid impermeable substrate in the thickness direction of the absorbent article is greater than or equal to the projection surface area of the absorber layer in the thickness direction of the absorbent article;

The surface of the liquid-permeable or liquid-impermeable underlayer is divided into two parts, a part of which covers the bottom layer of the absorber layer whose profile covers the absorber layer of the absorbent article, and another part which is not covered by the absorber layer. The bottom layer of the peripheral area;

Characterized in that the absorbent article comprises at least one of the following features for improving breathability:

A. The absorbent article comprises one or more first through holes extending from the liquid permeable top layer to the liquid permeable or liquid impermeable substrate through the absorbent article; and corresponding to the first The through-hole, the absorbent article further includes at least one leak-proof structure for preventing body fluid from leaking from the first through hole of the absorbent article;

B. The absorbent article comprises one or more selectively permeable structures, the selective permeable structure being a portion of the liquid permeable or liquid impermeable backsheet and the liquid permeable top layer or another liquid permeable material In combination with forming an enclosed space, a liquid swellable structure is disposed in the closed space, and one or more small holes or slits penetrating through the inside and outside of the closed space are provided on the upper and lower surfaces of the closed space for a gas permeable structure.

2. The absorbent article of claim 1 wherein:

The leak-proof structure of the absorbent article is selected from the group consisting of a leak-proof absorbent body, a ring-hole thickening leak-proof structure, a liquid-absorbent expansion barrier dam, a guide groove, or any combination thereof.

3. The absorbent article according to claim 2, wherein:

The leak-proof structure includes at least a leak-proof absorbent body, the leak-proof absorbent body is disposed around the first through-hole on a liquid-permeable top layer of the absorbent article, and has a first a second through hole communicating with the perforation, the leaky absorber comprising a liquid swell The liquid swellable structure causes the leakage absorbent body to expand in volume in a state of liquid absorption, thereby blocking body fluid from leaking from the first through hole and the second through hole.

4. The absorbent article according to claim 3, wherein:

Each of the first through holes is provided with one of the leak-proof absorbent bodies, and each of the leak-proof absorbent bodies comprises a liquid-permeable or liquid-impermeable underlayer, and the liquid-permeable or impervious a surface contact layer having the same or similar liquid phase underlayer, the liquid swellable structure being encapsulated between the liquid permeable or liquid impermeable substrate and the surface contact layer;

Each of the leakage absorbent bodies is provided with one or a pair of second through holes communicating with the first through holes, the second through holes penetrating the liquid permeation of the leaky absorbent body or a liquid-impermeable underlayer, the surface contact layer, and the liquid-swellable structure;

The expansion of the liquid-swellable structure does not destroy the leak-proof absorbent body, and the liquid-swellable structure contains a liquid-swellable material.

5. The absorbent article according to claim 2, wherein:

The leak-proof structure includes at least the ring-hole thickening leakage structure, wherein the annular-hole thickening leakage structure comprises at least one of the following structures:

C. The absorber layer at the peripheral region of the first through hole has a larger thickness, more liquid swellable material or better liquid swellability than the absorber layer of the adjacent region. a ring-hole thickened leak-proof structure of at least one characteristic of the material;

D. in a closed or semi-closed pattern, all or part of the range including 3-40 mm from the side of the first through hole, all surrounding or partially surrounding the range including the first through hole and all or part of the peripheral region thereof, And at the boundary of the enclosing range, the liquid permeable top layer of the absorbent article and the liquid permeable or liquid impermeable bottom layer of the absorbent article are bonded, hot pressed, ultrasonically or sewn A ring-hole thickened leak-proof structure formed by combining some or all of them in a direct or indirect manner.

6. The absorbent article according to claim 3, wherein:

The leak-proof absorbent body includes a ring-hole thickening leakage structure, wherein the ring-hole thickening leakage structure comprises at least one of the following structures:

C. The liquid-swellable structure at the peripheral region of the second through-hole has a larger thickness, a more liquid-swellable material or a better suction than the liquid-swellable structure of the adjacent region. a ring-hole thickened leak-proof structure of at least one characteristic of a liquid expansion property material; as well as

D. in a closed or semi-closed pattern, all or part of the range including 3-40 mm from the side of the second through hole, all surrounding or partially surrounding the range including the second through hole and all or part of the peripheral region thereof, And at the boundary of the enclosing range, the surface contact layer of the leak-proof absorber and the liquid-permeable or liquid-impermeable underlayer of the leak-proof absorber pass bonding, hot pressing, and ultrasonic waves. Or a ring-hole thickened leak-proof structure formed by combining some or all of the sewing methods directly or indirectly.

7. The absorbent article according to claim 2, wherein:

The leak-proof structure includes at least one or more liquid-absorbent expansion barrier dams, and the liquid-absorbent expansion barrier dam is disposed between the first through-hole and a portion of the body fluid or excrement leaving the user's body;

The liquid-absorbent expansion barrier dam is comprised of a water permeable material or structure and a liquid-swellable structure encased therein.

8. The absorbent article of claim 7 wherein:

The water permeable material or structure for constituting the liquid absorbing expansion barrier dam is combined with a boundary of a partial surface or a portion of the surface of the water permeable top layer of the absorbent article to form a closed closed dam closed Space, enclosing the liquid-swellable structure in the closed space of the leak-proof dam to form the liquid-absorbent expansion barrier dam.

9. The absorbent article according to claim 2, wherein:

The leak-proof structure includes at least one or more flow guiding grooves disposed between the first through hole and a portion of the user's body fluid or excrement leaving the body; the guiding groove is It refers to a groove which is formed at a certain portion of the surface of the liquid-permeable top layer of the absorbent article and which is more effective in the liquid-swelling state.

10. The absorbent article of claim 9 wherein:

11. The absorbent article of claim 1 wherein:

The selective gas permeable structure is disposed on the bottom surface of the peripheral region of the absorbent article a portion in which the liquid-permeable or liquid-impermeable underlayer of the absorbent article passing through the bottom layer of the peripheral region is partially bonded to the liquid-permeable top layer or another liquid-permeable material to form a bonding region and a substrate a non-bonding region surrounded by the bonding region, the unbonding region forming a first closed space, and a liquid absorbing and expansive structure disposed inside the first closed space, and the upper and lower surfaces of the first closed space are disposed through The small holes or slits inside and outside the first enclosed space are used for ventilation;

The composition of the liquid-swellable structure does not leak from the outside of the small hole or slit to the outside of the first closed space;

The first enclosed space is not destroyed by expansion of the liquid-swellable structure, and the liquid-swellable structure comprises a liquid-swellable material.

12. The absorbent article of claim 1 wherein:

The selective gas permeable structure is disposed in the absorbent body covering the bottom layer portion of the absorbent article, wherein the liquid permeable or liquid impermeable bottom portion of the absorbent article covering the bottom layer region by the absorbent body Combining with the liquid permeable top layer or another liquid permeable material at a localized location to form one or more liquid permeable top layers or additional liquid permeable material surrounded by the bonded locations and the absorption a second closed space formed by the liquid-permeable or liquid-impermeable bottom layer of the article; the upper and lower surfaces of the second closed space are provided with small holes or slits penetrating the inside and outside of the second closed space for ventilation;

The junction points of the same second enclosed space are connected to form a closed or approximately closed curve;

Providing a liquid swellable structure inside the second closed space, the second closed space is not broken by expansion of the liquid swellable structure, and the liquid swellable structure comprises liquid swellable material ;

The composition of the liquid-swellable structure does not protrude from the pores or slits and the liquid-permeable or liquid-impermeable backsheet of the absorbent article with the liquid-permeable top layer or another liquid-permeable material The portion where the partial positions are combined leaks to the outside of the second closed space.

The absorbent article according to claim 7 or 8, wherein one side of the longitudinal direction of the liquid-absorbent expansion barrier dam and its peripheral area are in surface contact with the absorbent article The liquid permeable top layer is combined.

14. The absorbent article of claim 13 wherein: The boundary contour of the contact surface of the liquid-absorbent expansion barrier dam and the liquid-permeable top layer is a fold line, a corrugation, a line segment, a circle, a semicircle or a cross line, or a combination formed by a line segment and a circular arc The shape is disposed between the first through hole and a portion of the user's body fluid or excrement leaving the body, or surrounds and partially or completely surrounds the first through hole, thereby functioning as a flow blocking and drainage .

15. The absorbent article of claim 10, wherein:

The specific value is a value between 0.1 mm and 30 mm.

16. The absorbent article of claim 9 wherein:

The flow guiding groove is formed at a portion where the flow guiding groove needs to be formed in the absorbent article, and a liquid swellable material having a smaller thickness than an adjacent portion thereof is used in the absorbent body layer, or less The structure formed by the liquid swellable material, or the material and/or structure having weak liquid swell expansion property, so that the thickness of the portion after the liquid absorbing expansion is smaller than the thickness of the adjacent portion.

The absorbent article according to claim 10 or 16, wherein: the contour of the flow guiding groove on the surface of the liquid permeable top layer is a line shape, a corrugation shape, a line segment, a circle shape, and a semicircle shape. a triangle, a quadrilateral or a line segment intersecting, or a pattern in which various combinations of line segments and arcs are disposed in the first through hole and the body fluid or excrement of the absorbent article user away from the body The first through hole is surrounded and partially or completely surrounded.

The absorbent article according to claim 11 or 12, wherein: said liquid absorbing structure of said selective gas permeable structure is composed of cellulose fluff pulp, a fabric layer and a suction having liquid swellability a structure composed of a liquid-swellable material, or a cellulosic or wrap-like structure formed by a hydrophilic or hydrophobic nonwoven fabric, or a water-absorbent paper material, or a combination of a partially hydrophilic material and a partially hydrophobic material; , a fabric layer and a structure formed by the liquid swellable material.

The absorbent article according to claim 11 or 12, wherein the water absorption amount of the liquid-swellable structure is in a range of from 1/100 to 2/3 of the liquid saturation amount. The naturally expanded volume of the liquid-swellable structure can block leakage of body fluid from the selective gas permeable structure.

20. The absorbent article of claim 1 wherein: The liquid permeable top layer of the absorbent article and the liquid permeable or liquid impermeable back layer of the absorbent article are directly bonded in a peripheral region of the first through hole, thereby absorbing the absorbent article Other structures and components that are penetrated by the first through-hole between the liquid-permeable top layer and the liquid-permeable or liquid-impermeable backsheet are encapsulated in the liquid-permeable top layer and the liquid-permeable or liquid-impermeable layer Between the underlying layers.

21. The absorbent article of claim 1 wherein:

At the first through hole, a liquid-permeable or liquid-impermeable first through-hole encapsulation layer formed by one or more sheets is passed through the absorbent article, and the liquid-permeable top layer and the The liquid permeable or liquid impermeable underlayer of the absorbent article is respectively bonded at a peripheral region of the first through hole, thereby absorbing the liquid permeable top layer and the liquid permeable or impervious of the absorbent article Other structures and components interposed between the liquid underlayers by the first through holes are encapsulated in the liquid permeable top layer and the liquid permeable or liquid impermeable underlayer of the absorbent article and the first through holes Between the encapsulation layers.

22. The absorbent article of claim 4 wherein:

The liquid-permeable or liquid-impermeable backing layer of the leak-proof absorbent body and the surface contact layer are bonded by bonding, hot pressing, locking, ultrasonic or sewing in a peripheral region of the second through hole And other structures of the leaky absorbent body penetrated by the second through hole between the surface contact layer and the liquid-permeable or liquid-impermeable underlayer of the leak-proof absorber An ingredient is encapsulated between the surface contact layer and the liquid permeable or liquid impermeable back layer of the leaky absorber.

23. The absorbent article of claim 4 wherein:

The leak-proof absorber is formed by a second through-hole encapsulation layer formed by combining one or more sheets with the liquid-permeable or liquid-impermeable back layer and the surface contact layer of the leak-proof absorber. The peripheral regions of the second through holes are respectively bonded by bonding, hot pressing, locking, ultrasonic or sewing, thereby contacting the surface contact layer and the leaky absorbent body of the leaky absorbent body The other structures and components interposed between the liquid-permeable or liquid-impermeable underlayer by the second through-hole are encapsulated in the liquid-permeable or liquid-impermeable liquid of the surface contact layer and the leak-proof absorber. The bottom layer and the second through hole encapsulation layer.

24. The absorbent article of claim 4 wherein:

The first through hole and the second through hole are the same or similar in size and shape. The first through hole and the second through hole completely coincide or nearly coincide in spatial arrangement; and

a liquid pervious or liquid impervious layer of the liquid permeable top layer of the absorbent article and the leaky absorbent body in a peripheral region of the first through hole and a peripheral region of the second through hole The bottom layer is bonded together by bonding, hot pressing, crimping, ultrasonic or sewing to prevent leakage of bodily fluids from the joint.

25. The absorbent article of claim 4 wherein:

The absorbent article and the leak-proof absorbent body are in a peripheral region of the first through hole and the second through hole by a crimping structure penetrating the first through hole and the second through hole a tightly bonded; wherein, in a peripheral region of the first through hole and a peripheral region of the second through hole, the liquid permeable top layer of the absorbent article and the leak-proof absorbent body are liquid-permeable or impervious The liquid bottom layer is tightly combined to prevent fluid outflow.

26. The absorbent article of claim 25, wherein:

The inner surfaces of the first through hole and the second through hole are encapsulated in the buckle structure.

27. The absorbent article of claim 4 wherein:

Using a third through-hole encapsulation layer formed by combining one or more sheets, one end of the third through-hole encapsulation layer and the liquid-permeable or liquid-impermeable underlayer of the leak-proof absorber are in the The peripheral area of the two through holes is bonded by bonding, hot pressing, locking, ultrasonic or sewing; and the other end of the third through hole encapsulating layer is bonded, heat pressed, latched, ultrasonically or sewn The manner is combined with the liquid permeable top layer of the absorbent article directly or indirectly in a peripheral region of the first through hole.

28. The absorbent article of claim 4 wherein:

a fourth through-hole encapsulation layer formed by one or more sheets joined through the first through hole of the absorbent article and the second through hole of the leak-proof absorbent body; and the fourth through hole One end of the hole encapsulating layer and the surface contact layer of the leaky absorbent body are bonded in a peripheral region of the second through hole by bonding, hot pressing, locking, ultrasonic or sewing; The other end of the through-hole encapsulation layer is bonded to the peripheral region of the first through-hole by bonding, hot pressing, locking, ultrasonic or sewing with the liquid-permeable or liquid-impermeable underlayer of the absorbent article ; The liquid permeable top layer of the absorbent article in the peripheral region of the first through hole and the liquid permeable or impervious of the leaky absorbent body in a peripheral region of the second through hole The liquid underlayers are respectively or together combined with a portion of the middle of the fourth through-hole encapsulation layer.

29. The absorbent article of claim 1 wherein:

The first through hole is disposed in a region of the absorbent article that is not directly facing the body fluid or excrement of the user away from the body to prevent body fluid or excretion from leaking directly from the first through hole.

30. The absorbent article of claim 1 wherein:

One or more of the first through holes are provided in an area corresponding to a portion where the user easily produces a diaper rash, that is, an area near the user's anus, the groin, or the butt, and the body fluid or the excrement is not easily accessible. The area, that is, the longitudinal end regions of the absorbent article and the groin portion of the user.

31. The absorbent article of claim 4, wherein:

The liquid-permeable or liquid-impermeable backing layer of the leak-proof absorbent body is made of a hydrophilic stretchable nonwoven fabric, and the surface contact layer of the leak-proof absorbent body is selected to be hydrophobic and non-stretchable. Woven fabric

The surface contact layer of the leak-proof absorbent body is provided with a hydrophobic non-woven fabric or foam or a net on the side surface of the body surface of the user by adhesion, hot pressing, locking, ultrasonic or sewing. Structure to improve the comfort and dryness of the skin.

32. The absorbent article of claim 3, wherein:

The second through hole is located at a geometric center of the leaky absorbent body or a peripheral region of the geometric center of the leaky absorbent body.

33. The absorbent article of claim 3, wherein:

The first through hole and the second through hole are circular, elliptical, square, diamond or slit.

34. The absorbent article of claim 3, wherein:

At least one of the first through hole and the second through hole is covered with a hydrophobic mesh or yarn-like gas permeable structure by heat pressing, bonding, crimping, ultrasonic or sewing in the peripheral region.

35. The absorbent article of claim 3, wherein:

The liquid-swellable structure of the leak-proof absorbent body is composed of a cellulose fluff pulp, a fabric layer and a liquid-swellable material having liquid-swelling properties, or is a hydrophilic or hydrophobic non-woven fabric. A cloth or a water-absorbent paper material, or a combination of a partially hydrophilic material and a partially hydrophobic material, forms a structure formed by a cellulosic or wrap-like structure encasing a cellulosic fluff pulp, a fabric layer, and the liquid-swellable material.

The absorbent article according to claim 3 or 4, wherein: the liquid swellable structure of the leak-proof absorbent body comprises a shaped structure or material to prevent the leak-proof absorbent body from being The liquid-swellable material in the liquid-swellable structure moves over a wide range in the leak-proof absorbent body.

37. The absorbent article of claim 3, wherein:

When the water content of the liquid-swellable structure reaches a liquid absorption level in the range of 1/100 to 2/3 of the liquid absorption saturation amount, the volume of the liquid-swellable structure naturally expands can block the body fluid from The first through hole and the second through hole are leaked outside;

The leaky absorbent body is not damaged by the expansion of the liquid-swellable structure.

The absorbent article according to claim 7 or 8, wherein: said liquid swellable structure of said liquid absorbing expansion barrier dam is made of cellulose fluff pulp, fabric layer and having liquid swellability a structure consisting of a liquid-swellable material, or a network of a hydrophilic or hydrophobic nonwoven fabric, or a water-absorbent paper material, or a combination of a partially hydrophilic material and a partially hydrophobic material a structure formed by a fluff pulp, a fabric layer, and the liquid swellable material.

The absorbent article according to claim 7 or 8, wherein: the liquid swellable structure of the liquid absorbing expansion barrier dam comprises a shaped structure or material to prevent the liquid absorbing expansion The liquid-swellable material in the liquid-swellable structure within the dam moves over a wide range within the liquid-absorbent expansion barrier.

The absorbent article according to claim 7 or 8, wherein the water absorption amount of the liquid-swellable structure is in a range of from 1/100 to 2/3 of the liquid saturation level. The naturally expanded volume of the liquid-swellable structure can block body fluid from leaking out of the first through hole through the liquid-absorbent expansion barrier dam;

The liquid-absorbent expansion barrier dam is not damaged by the expansion of the liquid-swellable structure.

41. The absorbent article of claim 4, wherein:

The liquid-permeable or liquid-impermeable underlayer of the leak-proof absorbent body is made of a liquid-impermeable material near the periphery of the second through-hole, and the liquid-impermeable material comprises ethylene, polyethylene plastic a non-liquid permeable nonwoven fabric, a polyethylene or polypropylene film, a nonwoven material having a liquid-impermeable material coating, a hydrophobic nonwoven material for preventing liquid permeation, or a laminated sheet of a plastic film and a nonwoven material; The liquid-permeable or liquid-impermeable underlayer portion of the leak-proof absorbent body at a distance from the periphery of the second through-hole is made of a liquid permeable material, and the liquid permeable material comprises: liquid permeable Spinning materials, including spunbond, meltblown, carded, hydro-acupuncture, or wet-laid materials; other liquid-permeable structures, including porous foams, porous plastic films; or water-absorbing materials, including absorbent paper materials Or the liquid-permeable or liquid-impermeable underlayer of the leak-leakage absorber away from the periphery of the second through-hole is made of natural fiber, rayon, or a mixture of natural and rayon; Natural fiber including wood pulp Cotton fiber; the rayon comprising polyester, polyethylene, polypropylene, viscose, or rayon; or the liquid permeation of the leaky absorbent body at a distance from the periphery of the second through hole or The liquid-impermeable underlayer is made of flax fibers which are bonded to each other in a bonding model.

42. The absorbent article of claim 4, wherein:

The liquid permeable or liquid impermeable bottom layer of the leaky absorbent body when the leaky absorbent body is disposed on the bottom layer of the peripheral region of the absorbent article that does not have the absorbent body layer Bonding, hot pressing, locking, directly surrounding the peripheral region of the first through-hole with the liquid-permeable or liquid-impermeable underlayer of the absorbent article in a peripheral region surrounding the second through-hole Ultrasonic or sewing combined; at the same time, the liquid-permeable or liquid-impermeable underlayer of the leak-proof absorbent body surrounds the peripheral region of the second through-hole and the surface of the leak-proof absorbent body The contact layer is directly bonded to the peripheral region surrounding the second through hole by bonding, hot pressing, locking, ultrasonic or sewing, or by respectively bonding and hot pressing with the cylindrical second through hole encapsulating layer. a combination of a buckle, an ultrasonic wave, or a sewing method to encapsulate a material, a structure, or the like, which is enclosed by the second through hole and wrapped in the leak-proof absorbent body, inside the leak-proof absorbent body, and to avoid Body fluid through the Two perforations and the through hole of the first through leakage.