CN104349796A

CN104349796A - Enhanced personal care absorbent articles

Info

Publication number: CN104349796A
Application number: CN201380027492.7A
Authority: CN
Inventors: F·P·阿布托; D·J·凯尔沃特斯; J·L·戴; K·M·德赛; J·F·朱若那; 秦建; D·E·沃尔德鲁普
Original assignee: Kimberly Clark Worldwide Inc
Current assignee: Kimberly Clark Worldwide Inc; Kimberly Clark Corp
Priority date: 2012-05-25
Filing date: 2013-04-09
Publication date: 2015-02-11
Anticipated expiration: 2033-04-09
Also published as: BR112014028558A2; WO2013175322A1; AU2013264859A1; GB201420155D0; MX2014013948A; RU2624510C2; RU2014149680A; AU2013264859B2; GB2515977A; CN104349796B; KR20150013552A

Abstract

The present invention relates to a personal care absorbent article comprising at least two substrates each having an internal and external surface, wherein at least one substrate is a fluid permeable bodyside substrate selected from spunbond, meltblown, coform, airlaid, bonded-carded web, spunlace materials and combinations thereof; at least one substrate is an impermeable backsheet; and an absorbent core disposed in between said substrates; wherein at least the external surface of at least one substrate has applied to it a benefit agent selected from an additive composition wherein said additive composition is a polymer dispersion selected from polyolefin dispersions, polyisoprene dispersions, polybutadiene-styrene block copolymer dispersions, latex dispersions, polyvinyl pyrrolidone-styrene copolymer dispersions, polyvinyl alcohol-ethylene copolymer dispersions, and combinations thereof; an enhancement component selected from microparticles, expandable microspheres, fibers, additional polymer dispersions, scents, anti-bacterials, moisturizers, medicaments, soothers and combinations thereof; and combinations thereof.

Description

The personal care absorbent goods improved

to the cross reference of related application

The application is the in December in 2011 submission on the 19th the 13/330th, the part continuation application of No. 440 U.S. Patent applications, described 13/330th, No. 440 U.S. Patent applications are the within 28th, submit in December in 2010 the 12/979th, the part continuation application of No. 852 U.S. Patent applications.

Invention field

The present invention relates to there is effective hierarchical system its on be applied with the personal care absorbent goods of the polymer composition of improvement.Especially; the present invention can be rendered as the absorbing products such as such as feminine pads, adult incontinence product, diaper and training pants; and improve the polymer technology of the sense of touch of whole goods, texture, aesthetic feeling and comfort level due to the protection that provide not only enhancing, this invention removes the needs to the non-woven of routine or membrane type side top flat.

background of invention

Disposable absorbent article, as feminine pads, baby diaper and incontinence garments, is made up of some different layers usually, is typically made up of at least 4 or more layers for the effect of different product performance.Such as, feminine pads generally includes: fluid penetrable bodyside liner (BSL), suck or the outer housing of surge layer (IL), absorbed layer and fluid impermeable.This BSL is made up of the film of the contact skin with wearer or non-woven material usually, to make wearer keep dry by making skin and the humidity in layer below separate and comfortable.Multiple perforate can be provided in BSL, suck to improve fluid.Although the film of BSL and non-woven material have their merits and demerits, extra play just needs extra material, process, operation, the cost of processing and different aspect and time in the structure of described goods.In addition, BSL is in fact the fluid barriers depending on material type, thickness and other factors; Therefore, perforate is needed in some cases.In addition, be usually not used as the top flat on personal care absorbent goods containing the base material of natural fiber as the such as coforming of paper pulp fiber or staple fibre, air-flow method or water thorn because they tend to sensation when the skin near user moist.But compared with being used as at present the non-woven or thermoplastic film of top flat, these base materials have higher in the absorbability of gram/gram (g/g) and usually lower cost.Therefore, such as coforming, air-flow method or water thorn material is ited is desirable to use as the sheet of the top layering on personal care absorbent goods, to protect and comfort level to increase while reduction product cost.

Therefore, the object of this invention is to provide disposable absorbent article, these goods provide whole benefits of the absorbing products built in a usual manner, can also realize with the sheet of less material and layering.Further, the object of this invention is to provide polymer chemical products, in the suction that this polymer chemical products is applied to the routine in feminine pads and other personal care product or surge layer, to provide the sense of touch of improvement at lower cost, also still there is the identical function of typical body sidelining.Except providing normal protection, the present invention is also for wearer provides the pliability of improvement, sense of touch, texture, visual sense of beauty and comfort level.

summary of the invention

The present invention relates to the personal care absorbent goods comprising at least two base materials, each base material all has inner surface and outer surface, wherein at least one base material is the side base material of fluid penetrable, and it is selected from the fibre web of spunbond, melt-blown, coforming, air-flow method, bonded carded, water thorn material and combination thereof, at least one base material is impermeable egative film, be placed in the absorbent cores between described base material, wherein at least outer surface of at least one base material has applied to be selected from compositions of additives, the beneficial agent (benefit agent) of enhancement component and combination thereof, wherein said compositions of additives is selected from polyolefin dispersion, polyisoprene dispersion, polybutadiene/styrene block copolymer dispersion, latex dispersion, polyvinylpyrrolidone/styrol copolymer dispersion, the polymeric dispersions of polyvinyl alcohol/vinyl copolymer dispersion and combination thereof, described enhancement component is selected from microgranule, expansiveness microsphere, fiber, other polymeric dispersions, odorant agent (scent), antibacterial, wetting agent, medicine, console agent (soother) and combination thereof.

Personal care absorbent goods of the present invention can be feminine hygiene, diaper, training pants or adult incontinence products etc. and realize the benefit of conventional absorbent articles, additionally provide there is enhancing pliability, comfort level and highly favourable layering the goods of sheet system.

accompanying drawing is sketched

Fig. 1 is the diagram of conventional feminine care pads, and this conventional feminine care pads demonstrates the sheet of typical four layers: the outer housing of the top flat of fluid penetrable, blot coat, absorbent cores and fluid impermeable.

Fig. 2 is embodiment of the present invention, and as the diagram of feminine care pads, wherein said liner lacks conventional top flat, and only has the outer housing of blot coat, absorbent cores and the fluid impermeable having used the modification of polymer beneficial agent.

Fig. 3 is the schematic diagram of the creping (creping process) according to one embodiment of the invention.

Fig. 4 is the description step by step to method example enhancer composition being applied to base material of the present invention.

detailed Description Of The Invention

Although this description, to specifically note and to explicitly call for protection claim of the present invention to terminate, is believed, will be understood the present invention better from following description.

All percentage ratio, number and ratio all based on the gross weight of compositions of the present invention, except as otherwise noted.All such weight all based on activity substance content (active level), does not therefore comprise the solvent in the material that may be included in commercially available acquisition or by-product, except as otherwise noted when it relates to listed composition.Term " percentage by weight " can be expressed as " wt.% " in this article.Except when providing the instantiation of actual measured value, numerical value mentioned herein is considered to be and is limited by word " about ".

As used in this article, " comprise " (" comprising ") to refer to and can add and not affect other step of final result and other composition.This term cover term " by ... composition " and " substantially by ... form ".The compositions and methods of the invention/technique can comprise fundamental of the present invention described herein and restriction and arbitrary other or optional composition described herein, component, step or restriction, can by be substantially made up of fundamental of the present invention described herein and restriction and arbitrary other or optional composition described herein, component, step or restriction.

As used in this article, phrase " absorbing products " generally refers to absorption and the device of receiving body fluids, more specifically, refer near or near placed to absorb and to hold the device of various fluids, particularly viscoelastic fluid of discharging from health.The example of absorbing products includes but not limited to, is intended for the absorbing products that individual dresses, as diaper; Incontinence product; Feminine hygiene, as female sanitary towel, underwear pad (panty liners), pads (interlabial pads) between tapon and lip; Other personal care garment; Deng.

As used in this article, term " hydrophilic " refers to that water contact angle is much smaller than the surface of 90 °.

Term " modification blot coat " refers to the non-woven material of polymer composition process of the present invention described herein, and described non-woven material includes but not limited to that spunbond, melt-blown, the Web materials of coforming, air-flow method, bonded carded, waterpower are wound around (water thorn) material and combination etc. thereof.Described modification blot coat is also set to the roof substrate of personal care absorbent goods by the present invention, instead of seen in conventional absorbent articles second.

The present invention relates to the personal care absorbent goods of the sheet system with effective layering.Personal care product of the present invention comprises at least two base materials; Each base material includes inner surface and outer surface.On at least outer surface of two base materials of the present invention one or both of, provide the beneficial agent not only for strengthening protection but also for strengthening pliability.

Beneficial agent

At least outer surface to two base materials of the present invention one or both of applies beneficial agent.Especially, beneficial agent is used to prepare modification blot coat of the present invention.The present invention does not have the conventional blot coat of conventional absorbent articles, but has modification blot coat, i.e. described blot coat polymer composition process described herein.Due to described modification blot coat, this invention removes the needs to other/conventional top sheet materials.Beneficial agent of the present invention also can be used to process other substrate/layer of the present invention.Such as, beneficial agent can be applied to the outer surface of egative film, to be that outer housing of the present invention/egative film increases the pliability strengthened, as in one embodiment, for the exterior material of diaper increases the pliability strengthened.In another embodiment, beneficial agent can be applied to the accommodation flank (containment flaps) of diaper and/or Attacking Midfielder or low back or leg seal pad (leg gasketing) (Hookean region), to improve pliability.In same diaper embodiment, beneficial agent also can be applied to the outer surface of diaper chassis, to strengthen pliability and the sense of touch improving diaper.Fig. 2 demonstrates one embodiment of the invention, and wherein beneficial agent 21 is applied on the blot coat of feminine pads, to prepare modification blot coat 22 of the present invention.Beneficial agent can be applied to the side base material of fluid penetrable to prepare modification blot coat, and this can by being applied to base material to realize with the amount of the weighing scale by base material about 3%, about 5% or about 10% to about 20%, about 15% or about 10% by beneficial agent.As described in this article, beneficial agent can be compositions of additives, enhancement component or its combination.

I. compositions of additives

In desired application, compositions of additives is with about 50mg/m ², or about 100mg/m ²to about 50,000mg/m ², or about 10,000mg/m ²or about 5,000mg/m ²level exist.Difference between these suggested range depends on product final use.Compositions of additives of the present invention can be the form of polymeric dispersions or the polymer solution of hereafter setting forth.

A. polymeric dispersions

The compositions of foamable water-soluble polymer can be the form of dispersion.Under some processing conditions, high pressure as is at elevated temperature extruded down, by the water soluble polymer material of the solid as such as powder, pellet etc. being mixed with water and surfactant (or kinds of surface activating agent), described water soluble polymer material can be changed into foamable dispersion.Subsequently described polymeric dispersions is mixed with air and foaming agent, to convert it into foam.

Example according to dispersion of the present invention includes but not limited to, polyolefin dispersion, as the commercially available Dow Chemical from U.S. Texas state Freeport; Polyisoprene dispersion, as the commercially available Kraton Polymers U.S.LLC from U.S. Texas state Houston; Polybutadiene/styrene block copolymer dispersion, as the commercially available BASF Corporation from U.S. New Jersey state Florham Park; Latex dispersion, as the commercially available Wacker from German Munich; Polyvinylpyrrolidone/styrol copolymer dispersion and polyvinyl alcohol/vinyl copolymer dispersion, the two all can obtain the Aldrich from U.S. Wisconsin state Milwaukee.

Compositions of additives of the present invention, such as dispersion, commercially available from Dow Chemical Corporation, it is made up of water, polyethylene/octene copolymer and ethylene and acrylic acid copolymer.Polyethylene/octene copolymer can with title (2980I type) is purchased from Dow Chemical Corporation, and ethylene and acrylic acid copolymer can with titles (59081 type) is purchased from Dow Chemical Corporation. serve as emulsifying and stablize the surfactant of dispersion granule. acrylic comonomers is neutralized to the degree of neutralization of about 80% by potassium hydroxide.Therefore, by contrast, ratio more hydrophilic.In dispersions, serve as surfactant or dispersant.With difference, when being suspended in dispersion, present the form that diameter is the droplet of several microns. molecule round droplet is to form " micelle " structure making droplet stable. comprise about 60% with 40%

When described dispersion becomes melt liquid on the hot surface of exsiccator, form continuous phase, and decentralized photo exists island are formed in " ocean ".This phase transformation is called as phase reversal (phase inversion).But, this phase reversal depend on external condition, as molecular weight and the concentration of temperature, time, solid.Finally, only when two kinds of polymer (or biphase) have the relaxation time being enough to allow phase reversal to complete, phase reversal just occurs.In the present invention, the film of coating keeps the form of dispersion, and this shows that phase reversal is incomplete.The benefit of remaining dispersion forms includes but not limited to, because of the exposure of phase and more hydrophilic coating; Because of be trapped in through coating the pliability through coated product that what layer was inner providing the bubble of extra bulkiness (bulkiness) and improve.

Method of the present invention can use high solid loading (high solid), full-bodied dispersion (about 10% to about 30%) can comprise a large amount of bubbles (larger than volume of dispersion at least 10 times of volume of air).It is desirable for commercially available acquisition (solid concentration of about 42%, comprises dispersion with the two) viscosity be about 500cps, and the viscosity of water is about 1cps.Containing about 20% the viscosity of dispersion be about 200cps, namely relatively high viscosity, and containing being less than about 1% the viscosity of dispersion can closer to the viscosity of water (1cp).After capturing a high proportion of air, through what foam the viscosity of dispersion compared with the dispersion before foaming exponentially level raise.The polymeric dispersions of another kind of commercially available acquisition can be conduct commercially available from Dow's.This polymeric dispersions only comprises desirably, the present invention can use beneficial agent, and wherein said compositions of additives comprises the dispersion of the weighing scale about 10% or about 20% or about 24% to about 27% or about 30% or about 32% by beneficial agent.

With reference to Fig. 3, when by when being applied in anapsid dryer surface 32 through the dispersion of foaming, limited amount water can from wherein rapid evaporation.It is believed that the slow evaporation of the dispersion caused due to high solid loading combines with its high viscosity, can prevent dispersion completes phase reversal (wherein become continuous print, become decentralized photo) and prevent caught air effusion.This produces the fused film with unique micro structure on the surface at heat drier, thus the most described chemicals is transferred to fibre web surface.Such as, beneficial agent of the present invention can through foaming and being attached to substrate surface by creping.

B. polymer solution

Foamable water-soluble polymer composition can be diluted, to form solution.Can using in the water soluble polymer material pass into solution of the solid as such as powder, pellet etc.Subsequently, this polymer solution can mix with air and foaming agent, changes into foam to make it.

The example of water-soluble polymer solution comprises synthesis base and natural both base water-soluble polymers.The water-soluble polymer of synthesis includes but not limited to, the copolymer of polyalcohols, polyamine, polyimides (polyimine), polyamide, polycarboxylic acids, poly oxide, polyglycols, polyethers, polyester, above-mentioned polymer and mixture.

Natural base water-soluble polymer includes but not limited to, modified cellulose, as cellulose ether and ester; Modified starch; Chitosan and salt thereof; Carrageenin; Agar; Gellan gum (gellan gum); Guar gum; Other modification of polysaccharides and protein; And combination.In a specific embodiment, water-soluble polymer also comprises poly-(acrylic acid) and salt thereof, poly-(acrylate) and poly-(acrylic acid) copolymer.Other water-soluble polymer be applicable to comprises the polysaccharide having and be enough to the chain length forming film, such as but not limited to, pulullan polysaccharide (pullulan) and pectin.Such as, water-soluble polymer can containing other Mono-olefinic unsaturated monomer, and this Mono-olefinic unsaturated monomer is not connected to sour side base, but can with the monomer copolymerization being connected to acidic group.Such compound such as comprises, the mono acrylic ester of Polyethylene Glycol or polypropylene glycol and monomethacrylates, and the molal weight (Mn) of described poly alkylene glycol is such as up to about 2,000.

In another embodiment, water-soluble polymer can be with trade (brand) name by Ashland, Inc. the hydroxypropyl cellulose (HPC) sold.This water-soluble polymer can be present in compositions of additives with any effective dose, and changes based on selected chemical constituent and desired final character.Such as, exist exemplary cases under, described biodegradable water-soluble polymer can based on the gross weight of compositions of additives, with about 1% to about 75%, or at least about 1%, at least about 5% or at least about 10%, or up to about 30%, up to about 50% or be present in compositions of additives up to the amount of about 75%, to provide the benefit of improvement.Other example of the water-soluble polymer be applicable to comprises by Ashland, Inc. with trade (brand) name the methylcellulose (MC) sold; By Ashland, Inc. with trade (brand) name the hydroxyethyl-cellulose sold; By Chemstar (U.S. Minnesota state Minneapolis) with trade (brand) name the hydroxypropyl starch sold.Any one in these chemicals once be diluted in water, be just placed in heat, in anapsid dryer surface, be transferred to fibre web surface with this chemicals the most at last.Water-soluble polymer in these chemicals includes but not limited to, polyvinyl alcohol, Polyethylene Glycol, poly(ethylene oxide), hydroxypropyl starch, hydroxypropyl cellulose and combination thereof.

II. enhancement component

The present invention provide not only the personal care absorbent goods with effective hierarchical system; and except the feel improved; due to beneficial agent described herein and method; present invention also offers the pliability of enhancing, and make use of the identical protection given by the personal care absorbent goods of routine simultaneously.In dispersion of the present invention, add enhancement component, thus provide cotton soft/fluffy sense for base material, instead of the silk usually experienced when being used alone dispersion/cunning is felt.Although silk/cunning sense may be wish for some base materials, the invention provides other and select, thus various texture and aesthetic feeling can be provided.Enhancement component of the present invention includes but not limited to, microgranule, as silica gel particle; The microsphere of heat-swellable, as fiber, as cotton linter bundle; Polymeric dispersions, as poly-(vinylpyrrolidone-styrene); And combination.When using the fiber of cotton linter bundle or other type, they can be the fibre length of fibre length to about 5mm of about 0.1mm.

Described enhancement component, except providing feel with distinct contrast, can also be provided in the other benefit can not recognized when being used alone dispersion.Enhancement component of the present invention also can comprise aromatic, antibacterial, wetting agent, consoles agent, medicine, surfactant, mucin (mucin) modifier and combination thereof.Such component has the sense of touch of improvement, fluid intake performance and other benefit from dispersion by making base material entirety, leaves the benefit that technology of the present invention just can not provide separately in addition.The present invention can adopt the combination of any one enhancement component or enhancement component, is included in compositions of additives of the present invention.Such as, enhancement component can by the weighing scale of dispersion composite, is added in dispersion of the present invention to the amount of about 10%, about 20% or about 30% with about 0.5%, about 1% or about 2%.

Enhancement component can add in the chemicals of foaming before or after chemicals is by foaming.In desired application, the level of enhancement component is the overall dry weight based on beneficial agent, about 0.5% or about 1% or about 2% to about 30% or about 20% or about 10%.

Have the fluid of viscoelastic properties, as personal care product applied menstruation, mucus, blood products, feces and other body fluid, there is the tendency of the absorption and distribution performance hindering personal care product.Therefore, the improvement of special hope is, in the chemicals through foaming, hydrophilic finishing agent is added: added before or after making chemicals foaming, or after the outer surface of the base material coating of foaming being applied to fluid penetrable, add on this coating with three kinds of different modes.Although be optionally, hydrophilic finishing agent described herein can to viscous fluid, as the viscosity of feces or rare BM (feces), elasticity and dirty apply the effect of various combination, this depends on its concentration and deposition of being added into dispersion or being applied to base material place.Hydrophilic finishing agent of the present invention is optional from polyethylene glycol laurate, polyethylene glycol lauryl ether and combination thereof.Advantageously, both polyethylene glycol laurate and the polyethylene glycol lauryl ether viscosity that can reduce viscoelastic fluid and elasticity.The example of the polyethylene glycol laurate be applicable to includes but not limited to, Cithrol 4ML, Cithrol 6ML, Cithrol 10ML, Macrogol 4000 monolaurate, Macrogol 600 dilaurate and combination thereof.The example of the polyethylene glycol lauryl ether be applicable to includes but not limited to, Macrogol 600 lauryl ether.Especially, polyethylene glycol lauryl ether and/or polyethylene glycol laurate not only serve as hydrophilic finishing agent, but also can reduce the dirty performance of viscoelastic fluid.Such hydrophilic finishing agent includes but not limited to, Polyethylene Glycol (PEG) 600 lauryl ether and related compound; Polyethylene Glycol (PEG) 600 monolaurate and related compound; And combination.PEG 600 lauryl ether useful is especially sold with trade name LUTENSOL A 65N by BASF Corporation.

Except PEG laurate and PEG lauryl ether, other polyethyleneglycol derivative also can be viscoelastic agent (that is, can reduce viscosity and the elasticity of viscoelastic fluid) and the hydrophilic finishing agent that can be used as personal care product described herein.As used in this article, term " polyethyleneglycol derivative " comprises any compound containing polyalkylene glycol moiety.The example of other PEG derivant be applicable to includes but not limited to, PEG monostearate, as PEG 200 monostearate and PEG 4000 monostearate; PEG dioleate, as PEG 600 dioleate and PEG 1540 dioleate; PEG monoleate, as PEG 600 monoleate and PEG 1540 monoleate; The mono-isostearate of PEG, isostearate as single in PEG 200; With PEG 16 octyl phenyl.Special polyethyleneglycol derivative as hydrophilic finishing agent be improve viscoelastic fluid respiratory time and reduce viscosity and elastic those.The example of such PEG derivant includes but not limited to, PEG 1540 dioleate, PEG 600 monoleate, PEG 1540 monoleate and PEG 16 octyl phenyl.These PEG derivants can be used as hydrophilic finishing agent and are used alone or combinationally use with PEG 600 monolaurate, PEG 600 lauryl ether and/or other viscoelastic agent.

In certain embodiments, hydrophilic finishing agent described herein, as Macrogol 600 lauryl ether and/or Cithrol 6ML, combination with one another can use or combinationally use with other viscoelastic agent.The example of other viscoelastic agents that can combinationally use with hydrophilic finishing agent includes but not limited to, sodium citrate, dextran, cysteine, Glucopon 220UP (can be used as the alkyl polyglucoside aqueous solution of 60% (by weight), obtain from Henkel Corporation), Glucopon 425, Glucopon 600, Glucopon 625.Other viscoelastic agent be applicable to is described in the 6th, 060, No. 636 United States Patent (USP)s.Have surprisingly been found that, some in fact increases the viscoelastic agent of the dirty effect of viscoelastic fluid when used alone, in fact can improve dirty effect when combinationally using with PEG 600 lauryl ether and/or PEG 600 monolaurate.Such as, in one embodiment, sodium citrate can combine with PEG600 monolaurate and be used as hydrophilic finishing agent.When two or more hydrophilic finishing agents combinationally use, the ratio being applied to often kind of hydrophilic finishing agent of personal care product is preferably about 1:2 to about 2:1, is more preferably the ratio of about 1:1.

When beneficial agent comprises the enhancement component combined with compositions of additives of the present invention, they can strengthen pliability and absorbability does not damage intensity.Beneficial agent of the present invention can be prepared according to following table, wherein presses the weighing scale of beneficial agent, comprises each component with particular percentile.Such as, the beneficial agent " A " of display in table 1, can comprise the compositions of additives of about 24%, such as polymeric dispersions, as the enhancement component of 6%, such as silica gel, as with 70% water.As example in table 1, other beneficial agent of the present invention can be contained in the present invention.

Table 1: benefit agent composition

III. processing aid

Processing aid of the present invention is included in and forms chemicals helpful in the technique of treated base material of the present invention.Processing aid slightly can be revealed in or can be melt in final, treated base material.Although the technique being only used to contribute to prepare treated base material just comprises them, they also can give benefit slightly desired by the present invention to base material.In order to the object of this application, " processing aid " is those that use in the technique making beneficial agent foam or beneficial agent to be applied to base material, and does not use in the technique preparing precursor base material.The example of processing aid is to obtain the Unichem from North Carolina state Haw River, the anion surfactant Unifroth 0154 of Inc.

A. foaming agent

Most of foaming agent is suitable for producing foam of the present invention.The foaming agent be applicable to includes but not limited to, the low molecule of liquid form or polymeric material.Foaming agent can be anionic, cationic or nonionic.These foaming agent can be divided into 4 groups according to function:

1. air Bu Huo Ji – is used for the ability of catching air of enhance liquid (dispersion, solution or mixture etc.), and it is weighed by measuring " blow-up ratio (blow ratio) ".The exemplary manifest of foaming agent includes but not limited to, potassium laurate, sodium lauryl sulfate, ammonium lauryl sulfate, ammonium stearate, potassium oleate, octadecyl sulfosuccinic amide disodium (disodium octadecyl sulfosuccinimate), hydroxypropyl cellulose etc.

2. Wen Dings Ji – for the bubble that the improves foam stability to time and temperature; Example includes but not limited to, sodium lauryl sulfate, ammonium stearate, hydroxypropyl cellulose etc.

3. Run Shi Ji – is for improving the wettability of the desiccated surface scribbling film.Example includes but not limited to, sodium lauryl sulfate, potassium laurate, octadecyl sulfosuccinic amide disodium etc.

4. Jiao Ning Ji – is used for the bubble by making compositions of additives take the form of the gel for strengthening walls to come in stable foam.Example includes but not limited to, hydroxypropyl cellulose, hydroxyethyl-cellulose, carboxymethyl cellulose and other modified cellulose ethers.

Some foaming agent can provide the more than one in above-mentioned functions.Therefore, there is no need whole four kinds of foaming agent to be all used in foamable compositions of additives.The chemical property of compositions of additives is depended in the selection of foaming agent.Such as, when compositions of additives comprise anionic group as time, the foaming agent be applicable to must be selected from anion or nonionic group.If use cationic foaming agent to strengthen the foaming capacity of anionic additive compositions, cationic components then in foaming agent can form ionic bond with the anionic group in compositions of additives, and makes both cationic foaming agent and anionic additive compositions all become water-insoluble due to the formation of described key.On the other hand, if compositions of additives comprises cationic components, be then not suitable for using anion foaming agent.

B. creping aid

Creping aid is added in beneficial agent of the present invention to make base material to the adhesion of dryer surface and the optimized chemicals of stripping performance.These fall into following grouping substantially:

1. adhere to Zhu Ji – for increasing the adhesion of base material to dryer surface.Example includes but not limited to, polyvinyl alcohol, polyacrylate, hydroxypropyl starch, carboxymethyl cellulose, kymene (kymene), polyvinylamine, its copolymer or mixture.

2. (release aid) – is for reducing the adhesion (strengthen base material to the stripping of dryer surface) of base material to dryer surface to peel off auxiliary agent.Example includes but not limited to, Polyethylene Glycol, polypropylene glycol, poly(ethylene oxide), poly(propylene oxide), polyolefin, fluorinated polyolefin, the copolymer comprising above-mentioned substance and blend.

3. Guization Zhu Ji – is used for the solidification accelerating or postpone described wrinkling bag (creping package), as plasticizer or flexibilizer.

Foaming process

Generally speaking, what the chemicals of preparation foaming utilized is system liquid and air all pumped in blender.Air is blended in liquid by blender, to prepare the foam comprising multiple minute bubbles inherently.This foam leaves blender and flows to applicator (applicator).

A parameter for the quality defining the chemicals through foaming is blow-up ratio, and it is defined with the ratio of the volume mixing front dispersion by the volume of the minute bubbles of being caught by dispersion chemistry product.Such as, for the blow-up ratio of 10:1, the dispersion flow velocity of 1 liter/min can make the air of 10 liters/min capture in its liquid and produce total foam flow velocity of 11 liters/min.

For realizing high blow-up ratio, the foaming capacity of mechanical mixture and compositions of additives is all determiners.If chemicals only can hold or catch blow-up ratio up to 5 volume of air, then no matter how powerful foamed cell (froth unit) is, and it all can not produce the stable foam that blow-up ratio is 10.Once removal mechanical force, any additionally exceed blow-up ratio be 5 air will discharge from foam system.In other words, any air of catching higher than the Air containment ability of dispersion will become unstable.After mechanical agitation stops, most of so unstable bubble will overflow (froth breaking) immediately from foam.

With reference to Fig. 3, demonstrate the system 30 that can produce according to the chemicals through foaming of the present invention with schematic diagram.First, by foamable chemicals (e.g., deng) put into chemicals tank 34.Chemicals tank 34 is connected to pump 36.The pipeline 38 between adjustment chemicals tank 34 and pump 36 may be it is desirable for, thus foamable chemicals can be sent to the pump of two different sizes.Desirably, chemicals tank 34 is positioned at the elevated levels place above pump 36, remains full of (primed) to make this pump.

An optional little secondary pumps (not shown) can be used to foam process is run under the speed lower relative to pump 36.Larger main pump 36 can be the flow rate of liquid that high coating speed and/or high compositions of additives amount produce up to 25 liters/min.Less, secondary pumps (not shown) can be the flow rate of liquid that low coating speed and/or low compositions of additives amount produce up to about 500 ml/min (cc/min).

Effusion meter 40 is positioned at pump (or multiple pump) between 36 and foam mixer 42.Flow rate of liquid is calculated by desired compositions of additives, chemicals solid concentration, linear velocity and applicator width.This flow rates can be about 5:1 to about 50:1.When using little secondary pumps, its flow rates is that about 10 ml/min are to about 500 ml/min.When using large pump 36, its flow rates is about 0.5 liter/min to about 25 liters/min.When using little secondary pumps (not shown), select the mass air flow sensor (not shown) of 20 liters/min.When running larger main pump 36, the mass air flow sensor 40 of 200 liters/min be used.

An aspect, foam mixer 42 can in the liquid mixture of foaming chemical product for being blended into by air, to produce minute bubbles in the foam.Use some above-mentioned flow rate of liquid and blow-up ratio, air is metered in system 30.Desirably, the foam mixer 42 being of a size of 25.4 centimetres (10 inches) can be used to produce foam.A kind of possible foam mixer 42 is CFS-10 inch foam generator (Foam Generator), and it is from the Gaston Systems of U.S. North Carolina state Stanley, Inc..

Desirably, the rotary speed of foam mixer 42 is restricted to about 600rpm.In this technique, the rpm speed of blender depends on the foaming capacity of compositions of additives (that is, it catches air to form the ability of stabilise bubbles).If compositions of additives easily foams, then usually require lower rpm.If compositions of additives not easily foams, then usually require higher rpm.Higher mixer speed contributes to acceleration and reaches foaming balance or best blow-up ratio.The normal rpm of blender is the about 20%-60% of maximum rpm speed.Except additive combination beyond the region of objective existence, the type of foaming agent and/or amount require impact also on mixer speed.

Check the bubble uniformity of described foam, stability and fluidised form.If the uniformity of bubble, stability and fluidised form do not reach desired standard, then before foam is imported applicator 44, can adjust the chemical composition of flow velocity, mixing velocity, blow-up ratio and/or solution/dispersion.

In one aspect of the invention, by be foamed and be used for wrinkling or other chemicals is blended and add chemicals tank 12. weak solution (total solid concentration of <10%) and other be difficult to foam chemicals generally need to add some materials to described preparation, to increase viscosity and foaming capacity.Such as, hydroxypropyl cellulose or other foaming agent or surfactant can be used to prepare stable foam, this foam be used for evenly being coated to the rotary drum of dryer surface through heating and impermeable surface.Enhancement component, as silica gel particle or cotton linter bundle, can add in compositions of additives in every way, described mode includes but not limited to: before compositions of additives is pumped into foaming machines, enhancement component is added in compositions of additives; Compositions of additives from foaming machines out after, but through foaming compositions of additives be applied in dryer surface before, by enhancement component introduce through foaming compositions of additives in; Or before substrate contact compositions of additives, enhancement component is coated to exsiccator.When enhancement component is introduced compositions of additives, be necessary, before this mixture is added foaming machines, ceaselessly to stir this mixture, settle down at container bottom to prevent solid enhancement component.When enhancement component is introduced the compositions of additives through foaming, need the device be applicable to, it guarantees the Homogeneous phase mixing of enhancement component and the compositions of additives through foaming.

Base material

The present invention relates to the personal care absorbent goods comprising at least two base materials.Each in described two base materials all has inner surface and outer surface.At least one base material is the side base material of fluid penetrable.Particularly, permeable side of the present invention base material is single modification blot coat, and it is selected from spunbond fibre web, melt spray fibre web, coforming fibre web, air-flow method fibre web, bonded carded web, water thorn material and combination thereof.Another base material is impermeable egative film.At least outer surface of at least one base material applies beneficial agent, and wherein beneficial agent is selected from compositions of additives, enhancement component and combination thereof.Beneficial agent can with about 50mg/m ²to about 50,000mg/m ², or about 50mg/m ²to about 10,000mg/m ²or about 100mg/m ²to about 5,000mg/m ²level be applied on base material.Difference between the scope of these suggestions depends on product final use.The present invention also comprises the absorbent cores be placed between described base material.

Personal care absorbent goods of the present invention can be the products being selected from various personal care absorbent goods, include but not limited to, feminine pads, adult incontinence product, diaper, training pants etc., due to mentioned above, that not only improve whole goods sense of touch and the beneficial agent providing efficiency in the hierarchical system of whole goods, described product eliminates the demand of the nonwoven top sheet to routine.Therefore the present invention relies on single modification blot coat material to realize the material layer separated by two at present, the i.e. dual-use function sucking management every wet and fluid realized near the non-woven of user skin or membrane type bodyside liner 12 and blot coat 14 as shown in Figure 1, thus provide such as example shown in Fig. 2, that cost reduces, effective personal care absorbent goods.

Conventional absorbent articles, as feminine care absorbent goods 10, such as illustrational in FIG, the top flat 12 of fluid permeable can be comprised; Be connected to top flat 12, the impermeable egative film 18 of liquid substantially; Be positioned over and be contained in the absorbent cores 16 between top flat and egative film.Described top flat can permeate the liquid being intended to be held by absorbing products or store effectively, and this liquid is such as through extending through the perforate of inner surface from outer surface; And described egative film can be substantially impermeable or can not effectively permeate desired liquid in addition.Except absorbent cores 16, conventional feminine care absorbent goods also can comprise the sheet of other layering, and it is called as blot coat 14.Blot coat 14 is also called as liquid blot coat, liquid wicking layers, liquid distribution layer, transfer layer, barrier layer etc. and combination thereof usually.Disposable absorbent article and assembly thereof can be set as provides the surface of body-facing (outer surface of conventional topsheet as described in this article and the outer surface of modification blot coat) and the surface (outer surface of egative film) towards clothing.As used in this article, " body-facing " surface or " side " surface refer to, towards the surface that the health layout of wearer or the health of contiguous wearer are placed during routine use.For the present invention, body side surface is the outer surface of modification blot coat." garment side surface " refers to the outer surface of outer housing or egative film, and wherein during routine use, described surface is away from wearer's body and the clothing of contiguous wearer are arranged.In addition, the people's such as Misek the 7th, 632, also describe in further detail absorbing products in No. 258 United States Patent (USP)s.

To sum up, typical absorbing products 10 comprises the sheet of at least three layerings be made up of top flat 12, absorbent cores 16 and egative film 18.Because most of absorbing products now comprise liquid blot coat 14 further, they are also made up of the sheet of at least four layerings.Owing to this invention removes the needs of the top flat 12 for the fluid penetrable of routine, so the present invention achieves effective production under the prerequisite of performance not damaging absorbing products.

Although the present invention is mainly in conjunction with feminine hygiene products, as female sanitary towel, between underwear pad and lip, pad is discussed, but based on the present invention, to those skilled in the art be obviously, goods described herein and method also can with numerous, be designed to other absorbing products absorbing the fluid except menstruation, such as but not limited to, diaper, incontinence articles and training pants for rare BM, urine etc. combinationally use.

With reference to Fig. 2, illustrate absorbing products of the present invention typically with the form of women/incontinence pad, and represent that it is overall with reference marker 20.Described exemplary women/incontinence pad comprises, and has clothing side, the egative film (being called catch or egative film in addition) 26 of outer surface, absorbent cores 24 and has the modification blot coat 22 of side, outer surface.

Modification blot coat

As shown in Figure 2, the top flat of conventional fluid penetrable does not occur in the present invention.Disposable absorbent article of the present invention is particularly suitable for receiving the fluid with viscoelastic property, as menstruation, mucus, blood products and feces etc., by with the single blot coat that beneficial agent 21 compositions-treated of the present invention is crossed, area is stain comprising to reduce, reduce rewetting, improve fluid suction, distribution, absorbent properties, and minimizing spills.Because the outer surface of blot coat processed with beneficial agent 21, so blot coat of the present invention is the most applicable be referred to as modification blot coat 22.As shown in the embodiment of figure 2, the present invention also provides at least absorbent cores 24 and egative film 26.

The basic weight of modification blot coat of the present invention be determine with gram/m (gsm) and can in about 10gsm, about 25gsm or the about 25gsm scope to about 100gsm, about 150gsm or about 200gsm.Such as, modification blot coat of the present invention can in the scope of about 14gsm to about 200gsm.

Benefit provided by the invention is also to prevent to stain, rewetting and make the particle debris deposit from bodily waste on body-facing surface and other things beastly minimized.Such as, according to thickness, density and other material structure factor, as permeability, modification blot coat 22 can have and is greater than about 1g/g or is greater than about 5g/g or is greater than the absorptive capacity (liquid grams/modification blot coat grams (g/g)) of the saline of about 10g/g, menstruation or other liquid body waste.The absorptive capacity of modification blot coat example can be revised reserve capacity (Modified Retention Capacity) (mCRC) test and determines described as follows:

Revise Centrifuge Retention Capacity (mCRC) test

This test can be used to determine absorptive capacity when modification blot coat of the present invention is under limited fluid conditions.The liquid grams (g/g) that the sample that the reserve capacity obtained is expressed as every grammes per square metre retains.In the method, the dry modification blot coat of 2.0 to 10 ± 0.050 gram is inserted tea bag.Heat sealable tea bag material, such as can be used as the heat sealable tea bag material of model name 1234T acquisition from Dexter Corporation (having place of business at Land of Steady Habits Windsor Locks), heat sealable filter paper is all respond well for great majority application.This bag is following formation: by the bag material sample doubling of 5 inches × 3 inches (12.7 centimetres x 7.6 centimetres), and by the heat-sealing of the edge of two openings to form the rectangle pouch of 2.5 inches × 3 inches (6.4 centimetres x 7.6 centimetres).Heat-sealing in described edge of materials inwardly about 0.25 inch (0.6 centimetre) is.

After sample is put into pouch, all the other open edges of pouch also can be heat-sealed.Also can make empty bag, with comparing.The saline solutions of 10 milliliters (i.e. the sodium-chloride water solution of 0.9wt%) are put into container, and this container large must being enough to allows tea bag to set level, but so little that to be enough to prevent saline from spreading on large regions.Bottom transverse sectional area for the container of saline should be 8 inches ²-15 inches ²(52cm ²– 97cm ²).Appropriate vessel is the Petri dish (Petri dish) of diameter 100 millimeters, catalog number (Cat.No.) 25384-056, can obtain from VWR International (place of business is positioned at U.S. Pennsylvania state West Chester).Tea bag is placed regular time section in saline solution, such as 5 minutes, below guaranteeing that bag remains on, until their complete wetting.In normal saline after set time section described in submergence, under 290G power (excursion is about 286 to about 292G power), by centrifugal for tea bag 3 minutes.G power is defined as the inertia unit of force stood in the main body of acceleration or gravity fast, and sea level place equals 32 feet per seconds/second.

The amount of absorbed saline solution is determined by measuring tea bag weight.Taken into account by the solution that bag self retains, the amount of solution that modification blot coat sample retains is the absorptive capacity of modification blot coat sample in described fixing Immersion time, is expressed as fluid grams/sample grams.More specifically, the such as the following formula of absorptive capacity is determined:

In order to fully be characterized in the absorptive capacity under Liquid of limited volume condition, needing to prepare as described above multiple sample of modification blot coat material and putting into multiple tea bag.Each tea bag must be immersed in its respective 10 mL of saline solution.The time that single sample is immersed in saline solution should be 5 minutes to 20 minutes, 5 minutes, interval.Every section of Immersion time only with repeating once to have come, and can calculate absorptive capacity with every section of Immersion time and averages.

Beneficial agent 21 is coated to the outer surface of modification blot coat 22 or the outer surface of egative film 26.Although the present invention preferably by wrinkling for beneficial agent on modification blot coat 22, but it should be noted that, beneficial agent also can be coated on base material by various alternate manner, described alternate manner includes but not limited to spraying, printing, gap coating (slot-coated) or identical roller coat (kiss rolling), to obtain modification blot coat 22 of the present invention.The example be coated to by beneficial agent on base material is described in 13/330th, No. 440 people such as U.S. Patent application and Qin of the people such as co-pending Qin in December in 2011 submission on the 19th in the 12/979th of December in 2010 submission on the 28th, in No. 852 U.S. Patent applications.

Different from other goods coating etc. be provided on base material in order to the benefit strengthened, unique distinction provided by the invention is, it provide not only effective layered articles, and it also offers the pliability of improvement.The most significantly, the compositions of beneficial agent described herein provides such pliability, and compositions is not transferred to the skin of user from base material.The benefit agent composition of described uniqueness by within 19th, submit in December, 2011 with the people such as co-pending Qin herein the 13/330th, No. 440 people such as U.S. Patent application and Qin are in the 12/979th of December in 2010 submission on the 28th, and the method described in No. 852 U.S. Patent applications is to be attached on outside substrate surface.Therefore, from to be applied on base material and different to give softer sense of touch or to cure emulsion, medicine and other compositions of performance etc. on the skin being transferred to user subsequently, the invention provides such benefit, compositions need not be made to leave base material and deposit on the health, clothing etc. of wearer.

Modification blot coat 22 can be various shape as known in the art and structure, such as rectangle, hourglass shape and I shape etc.; And multiple perforates with difformity, size and hole density (hole/in2) can be arranged to, described perforate extends past inner surface from outer surface, flows to absorbent cores between modification blot coat 22 and egative film 26 and other layer to impel fluid through modification blot coat 22.Modification blot coat 22 has relative horizontal edge (not shown) and relative vertical end (not shown) further.Described horizontal edge and vertical end together form the girth of absorbent assembly.Modification blot coat 22 is designed to suck body exudates, comprises menstrual fluid, blood, urine and other body fluid.Modification blot coat 22 can be made up of various material.The material being suitable for modification blot coat 22 comprises the fibre web of spunbond, melt-blown, coforming, air-flow method, bonded carded, water thorn material and combination thereof.Desired modification blot coat 22 material is optional controls oneself with the air-flow method of beneficial agent process described herein, water thorn or coforming material.

Modification blot coat of the present invention can comprise perforate further, and remain on described surface to contribute to anti-fluid, this can stay on said surface and be derived from spot, the fragment of accumulation or the unhappiness of humidity and/or unclean sense.Modification blot coat can comprise described perforate, has viscoelastic fluid, such as menstruation, mucus, blood products and feces etc. to receive better, area is stain comprising to reduce, reduce rewetting, improve fluid suction, distribution, absorbent properties, and minimizing spills.Change in the overall distribution that described perforate can be set up at the number of shape, size and the perforate in modification blot coat and cloth.The scope of opening diameter can be that about 0.1mm is to about 5mm, about 0.4mm to about 1.5mm or about 0.5 to about 1.0mm.The scope of perforate density can be about 7.8x10 ³individual hole/m ²to about 1.9x10 ⁶individual hole/m ², about 4.7x10 ⁴individual hole/m ²to about 9.3x10 ⁵individual hole/m ²or about 1.6x 10 ⁵individual hole/m ²to about 3.1x 10 ⁵individual hole/m ².Described perforate may extend past modification blot coat, passes and arrive the inner surface of modification blot coat from the outer surface of body side surface.In addition, the outer surface of modification blot coat 22 can have the embossed designs of difformity, size and pattern, to improve the visual sense of beauty of personal care product and/or fluid is guided to described perforate, for absorbing in the absorbent cores 24 under modification blot coat 22.

Absorbent cores

Absorbent cores 24 of the present invention comprises super-absorbent material, which raises absorbing products absorbs a large amount of fluid ability relative to himself weight.Generally speaking, super-absorbent material can be water-swellable, it is generally polymeric absorbent material that is water insoluble, that form hydrogel, its normal saline (as, the saline of the NaCl containing 0.9wt%) in can absorb its weight at least about 15 times, compatibly about 30 times, and about 60 times or more times possibly.Super-absorbent material can granule or insert with the form of sheet.Super-absorbent material can be biodegradable or ambipolar.Super-absorbent material can be made up of polymeric material that is organic, that form hydrogel, and described polymeric material can comprise natural material, as agar, pectin and guar gum; Modified natural materials, as carboxymethyl cellulose, carboxyethyl cellulose and hydroxypropyl cellulose; And the polymer of the formation hydrogel of synthesis.The polymer of the formation hydrogel of synthesis comprises, such as polyacrylic alkali metal salt; Polyacrylamide; Polyvinyl alcohol; Ethenyl maleic anhydride copolymer; Polyvinylether; Polyethylene morpholone (polyvinyl morpholinone); The polymer of vinyl sulfonic acid, polyacrylate, polyacrylamide and polyvinylpyridine etc. and copolymer.The polymer of other formation hydrogel be applicable to comprises, the starch of the acrylonitrile grafting of hydrolysis, acrylic acid-grafted starch, isobutylene maleic acid anhydride copolymer and composition thereof.The polymer forming hydrogel can be slightly crosslinked, to make material substantially water insoluble.Crosslinked can be such as by irradiation or be covalent bond, ionic bond, Van der Waals force or hydrogen bond.The polymer of hydroxy-functional has been found to be the excellent super-absorbent material for sanitary towel.The commercially available Evonik Stockhausen from U.S. North Carolina state Greensboro of such super-absorbent material, LLC; The BASF Corporation of U.S. New Jersey state Florham Park; With the Nippon Shokubai of U.S. Tennessee state Chattanooga, and be in the part of the cross-linked copolymer of polyacrylic acid and polyvinyl alcohol and salt, described salt is greater than the absorbability of every gram of absorbing material 25 grams of absorbing fluid (g/g) under having load value.Also the super-absorbent material of other type well known by persons skilled in the art can be used.

Egative film

Egative film can be made up of any effective material, and can have liquid permeable or the liquid impenetrability of selected level as desired.Such as, egative film can be configured to provide the baffle structure of impermeable liquid effectively.Egative film such as can comprise, polymeric film, Woven fabric or supatex fabric etc., and its combination or its composite.Such as, egative film can comprise being laminated to and weaves or the polymeric film of supatex fabric.In a specific features, polymeric film can by polyethylene, polypropylene or polyester etc., and its combination is formed.In addition, polymeric film can be micro-embossed (micro-embossed), has the design of printing, have printing give consumer information and/or can be painted at least in part.Compatibly, egative film can allow air or steam to sufficiently pass through from goods effectively, and blocks body fluid simultaneously and pass through.The example being suitable for the material of egative film can comprise, and ventilative microporous membrane, such as, be described in the 6th as people such as McCormack, 045, those in No. 900 United States Patent (USP)s.Also two component films or other multi-component membranes can be used, and processed to make it can the weaving and/or supatex fabric of permeation liquid effectively.The another kind of stock footage be applicable to can comprise closed cell polyolefin foams.Beneficial agent of the present invention can be coated to towards on the outer surface on the surface of clothing side by egative film of the present invention.When compared with untreated surface, such process can be user and provides the protection of enhancing and softer sense of touch.

Embodiment

Following examples further describe and demonstrate embodiment within the scope of the invention.Due under the prerequisite not deviating from the spirit and scope of the present invention, embodiment may have a lot of change, so embodiment is only used to, illustrational object just provides, and can not be interpreted as limitation of the present invention.

Method of testing

(1) for feel grading test (In-Hand Ranking Test, IHR Test) of sense of touch performance:

Feel grading test (IHR) is to the basic evaluation of the feel of fibrous web and have evaluated the attribute of such as pliability.Relevant compared with the control in acquisition, whether change in process can be therefore easily perceived by humans and/or affect the quick reading aspect of pliability perception, and this test is useful.The difference of the IHR pliability data between treated fibre web and contrast fibre web reflects the degree of pliability improvement.

Training tester group, to provide the assessment more accurately that may provide than the ordinary consumer of not training.Usage ratio risk regression model (proportional hazards regression model), analyzes described group to the ratings data done by each Sample code.This model computationally supposes that described group member is to the most weak attribute to carry out evaluation process from the strongest attribute to be evaluated.Pliability test result represents for lod value.Lod is by the natural logrithm of proportional hazards regression models to the risk ratio that each code is assessed.Lod is larger, shows that the intensity that interested attribute is perceived is larger.

Because IHR result lod represents, the significant difference that in fact difference in the pliability improved show than these data many.Such as, when the difference of IHR data is 1, in fact it represent there be 10 times (10 in whole pliability ¹=10) improvement, or have 1 compared with its contrast, the improvement of 000%.In another example, if described difference is 0.2, it represents 1.58 times (10 ^0.2=1.58) or the improvement of 58%.

The data deriving from IHR can also represent with the form of grading.Because the product of therewith grading is depended in the grading of product, so described data generally can be used to carry out relative comparison in test.When at least one product is all tested in two kinds of tests, the comparison of (Across-test) between can testing.

(2) Centrifuge Retention Capacity (mCRC) test revised

Centrifuge Retention Capacity (mCRC) test revised can be used to determine when under limited fluid conditions, the absorptive capacity of modification blot coat of the present invention.As described in this article, the reserve capacity obtained is expressed as retained liquid grams/sample grams weight (g/g).More specifically, absorptive capacity is determined by following equation:

In order to fully be characterized in the absorptive capacity of MIL under Liquid of limited volume condition, needing to prepare as described above multiple sample of modification blot coat (MIL) and putting into multiple tea bag.Each tea bag must be immersed in its respective 10 mL of saline solution.The single sample time range be immersed in saline solution should be 5 minutes to 20 minutes, 5 minutes, interval.Every section of Immersion time can only repeat once to have come, and can calculate absorptive capacity to every section of Immersion time.

Embodiment 1:

Age 21-65 year the sensation group (sensory panel) of 12 women group memberships composition, have evaluated the pliability of selected nonwoven substrates (table 2) compared with uncoated base material (table 2) scribbling beneficial agent of the present invention " A " (table 1), described beneficial agent " A " comprises the water of about 70%, the silica gel obtained from Sigma Aldrich or Grace Davidson obtaining HYPOD 8510 polyolefin dispersion from DOW Chemical and 6% of 24%.Indicate this group member to be placed on mat with certain order by sample, and blind code face up.(note: " blind code " be such as 3 figure places as ' 365 ', it is used for " covering (blind) " sample only can identify sample by number instead of by composition to make group member.Group member once arranges 4 samples, and with sample described in special order evaluation.Such as, 4 base materials are assessed from left to right by ' 365 ', ' 428 ', ' 209 ' and ' 731 '.Group member assess each sample and subsequently according to the attribute requiring her to assess to arrange them).

Adopt circular motion, indicate them to dab each sample by the finger belly of the finger (forefinger, middle finger and the third finger) on their strong hand.Require that they are by feeling that the most soft extremely least softness is to arrange sample subsequently.The result of table 3 shows, code 35A, 16,3 and 13, all scribble the beneficial agent additive (add-on) (grams of beneficial agent is than the grams of base material) by substrate weight roughly 20%, than top flat base material (the code 11 – film that the routine used in two kinds of commercially available feminine menstrual sanitary belts is not coated with regard to pliability; With code 22 – spunbonded nonwoven) grading higher.

Code 35A is ventilative bonded carded web (TABCW) material of 24gsm (gram/m), and it scribbles benefit agent composition of the present invention and provides perforate; Code 16 is coforming materials of the 40gsm of non-perforate, and it comprises Vistamaxx 2330 polymeric meltblown fiber, the CF405 paper pulp fiber from Weyerhaeuser of 60% and TECHSURF 15560 surfactant of 3% of 40%; Code 13 stings material for water and code 3 is proprietary nonwoven laminates.

Table 2: base material

Table 3: the grading of base material pliability

* see table 3: " overall probability " refers to that described code elects the most soft probability as by by group member." lod " refers to the softness values calculated by ratings data.Lod is higher, and base material feels more soft." 95% grouping " refers to because statistics are similar, how to be divided into groups based on its lod by base material.

* with " height ", " in " and " low " code of representing, refer at each contrast code for comparing the textile material used in the research of sensation.Contrast code used is shown in following table 4:

Table 4: control sample

Embodiment 2:

Embodiment 2 is feminine hygiene pads of the present invention portentous, it absorbent cores comprising the side base material of modification blot coat fluid penetrable, the egative film of fluid impermeable and be arranged at therebetween.Modification blot coat is the coforming material of 40gsm, it comprises the paper pulp fiber of about 60%, the meltblown fibers of 40% scribble the beneficial agent " A " of table 1, described beneficial agent " A " comprises HYPOD 8510 polyolefin dispersion of about 24%, can obtain from DOW Chemical; The water of 70%; Silica gel with 6%, can obtain from Grace Davidson, MD.Beneficial agent additive is by coforming substrate weight about 20% w/w percentage ratio.The modification blot coat of fluid penetrable is cut into desired pad size and shape, as hourglass shape, and be bonded to the catch of fluid impermeable with such as binding agent and/or ultrasonic bonds method from periphery, as 1.0 mils (mil) the XP-3473A white polyethylene film from the Pliant of Illinois state (IL) Schaumburg can be obtained.The absorbent cores be enclosed between the modification blot coat of fluid penetrable and catch is the air-flow method composite of 200gsm, it can obtain from Concert Industries, comprises Koch Cellulose Golden Isles 4881 paper pulp fiber of about 77%, the bi-component polyethylene/polypropylene binders fiber of 8% and super absorbent polymer (from the BASF) SAP of 15%.Described feminine pads provides other functional characteristic, such as attachment mechanism, as on the clothing side of catch base material, for liner being adhered to the cohesive peel strip of the underwear of user.

Embodiment 3:

Embodiment 3 is another embodiment portentous and identical with embodiment 2, except side (modification blot coat) base material of fluid penetrable is the coforming material that basic weight is about 200gsm.

Embodiment 4:

Embodiment 4 is another embodiment portentous and identical with embodiment 2 or 3, except side (modification blot coat) base material of fluid penetrable provides multiple perforate.Opening diameter can be about 0.1mm to about 5mm, about 0.4mm to about 1.5mm or about 0.5 to about 1.0mm.Perforate density also can be about 7.8x10 ³individual hole/m ²to about 1.9x10 ⁶individual hole/m ², about 4.7x10 ⁴individual hole/m ²to about 9.3x10 ⁵individual hole/m ²or about 1.6x 10 ⁵individual hole/m ²to about 3.1x 10 ⁵individual hole/m ².

Embodiment 5:

Embodiment 5 is another embodiment portentous and identical with embodiment 2, except the side (modification blot coat) of fluid penetrable is air-flow method base material, the heat bonding air-flow method fibre web of such as 125gsm, it comprises the paper pulp fiber of about 81% and bi-component (PE/PP) adhesive fiber of 19%.

Embodiment 6:

Embodiment 6 be another embodiment portentous and with embodiment 2,3 or 5 identical, modification blot coat substrate material is applied except using beneficial agent " B ", described beneficial agent " B " comprise the Syloid 244FP silica gel of the Grace Davidson from the Maryland State (MD) Columbia of the HYPOD 8510,6% from Dow Chemical of about 24%, the water of 65% and 5% the non-ionic surface active agent Lutensol A65N from BASF, it is about 5% to 20% of substrate weight that wherein said coating adds weight.

Embodiment 7:

Embodiment 7 is another embodiment portentous and identical with embodiment 1-6, except beneficial agent additive is by substrate weight about 10% w/w percentage ratio (basic weight based on base material).

Embodiment 8:

Embodiment 8 is another embodiment portentous and identical with embodiment 7, except beneficial agent additive is by substrate weight about 5% w/w percentage ratio (basic weight based on base material).

Embodiment 9

Embodiment 9 is feminine hygiene pads of the present invention portentous, and it comprises the side nonwoven substrates of modification blot coat (modification blot coat) fluid penetrable, and as in table 2, basic weight is about 14gsm to 200gsm; The egative film of fluid impermeable; And the absorbent cores be arranged at therebetween.Most preferred modification blot coat is the ventilative bonded carded web (TABCW) of 20gsm-150gsm, it scribbles the beneficial agent of " A, B, C, D, E or the F " being selected from table 1, and the amount of described reagent additive is by substrate weight about 3% to 20% w/w percentage ratio (basic weight based on base material).The modification blot coat of fluid penetrable is cut into desired pad size and shape, as hourglass shape, and be bonded to the catch of fluid impermeable with such as binding agent and/or ultrasonic bonds method from periphery, as 1.0 mils (mil) the XP-3473A white polyethylene film from the Pliant of Illinois state (IL) Schaumburg can be obtained.The absorbent cores be enclosed between the modification blot coat of fluid penetrable and catch is the air-flow method composite of 200gsm, it can obtain from Concert Industries, comprises the Koch Cellulose Golden Isles4881 paper pulp fiber of about 77%, the bi-component polyethylene/polypropylene binders fiber of 8% and super absorbent polymer (from the BASF) SAP of 15%.Described feminine pads provides other functional characteristic, such as attachment mechanism, as on the clothing side of catch base material, for liner being adhered to the cohesive peel strip of the underwear of user.

Embodiment 10

Embodiment 10 is feminine hygiene pads of the present invention portentous, and it comprises the side nonwoven substrates of modification blot coat (modification blot coat) fluid penetrable, and as in table 2, basic weight is about 14gsm to 200gsm; The egative film of fluid impermeable; And the absorbent cores be arranged at therebetween.Preferred modification blot coat is water thorn (waterpower winding) non-woven material of 20gsm-150gsm, it comprises the paper pulp of such as 50% and the synthetic fibers of 50%, and scribbling the beneficial agent of " A, B, C, D, E or the F " being selected from table 1, the amount of described reagent additive is by substrate weight about 3% to 20% w/w percentage ratio (basic weight based on base material).The modification blot coat of fluid penetrable is cut into desired pad size and shape, as hourglass shape, and be bonded to the catch of fluid impermeable with such as binding agent and/or ultrasonic bonds method from periphery, as 1.0 mils (mil) the XP-3473A white polyethylene film from the Pliant of Illinois state (IL) Schaumburg can be obtained.The absorbent cores be enclosed between the modification blot coat of fluid penetrable and catch is the air-flow method composite of 200gsm, it can obtain from Concert Industries, comprises Koch Cellulose Golden Isles 4881 paper pulp fiber of about 77%, the bi-component polyethylene/polypropylene binders fiber of 8% and super absorbent polymer (from the BASF) SAP of 15%.Described feminine pads provides other functional characteristic, such as attachment mechanism, as on the clothing side of catch base material, for liner being adhered to the cohesive peel strip of the underwear of user.

Embodiment 11

Embodiment 11 is another embodiment portentous and identical with 10 with embodiment 9, except absorbent cores compositions comprises the Time of Fluff Slurry of 0-100% and the super absorbent polymer of 0-100%.

Embodiment 12

Embodiment 12 is another embodiment portentous and identical with embodiment 11, except personal care product portentous is diaper, but not feminine hygiene; And preferred base material is basic weight is the non-woven material of about 10gsm to about 150gsm, and described non-woven material is selected from spunbond and nonwoven laminates, as spunbond-melt blown-spunbond (SMS).

Embodiment 13

Embodiment 13 is another embodiment portentous and provides multiple perforate for the modification blot coat of above-described embodiment, and wherein opening diameter can be about 0.1mm to about 5mm, about 0.4mm to about 1.5mm or about 0.5 to about 1.0mm.Perforate density also can be about 7.8x10 ³individual hole/m ²to about 1.9x10 ⁶individual hole/m ², about 4.7x10 ⁴individual hole/m ²to about 9.3x10 ⁵individual hole/m ², or about 1.6x 10 ⁵individual hole/m ²to about 3.1x 10 ⁵individual hole/m ².Perforate can extend past modification blot coat, passes and arrive the inner surface of modification blot coat from the outer surface of body-facing.

Embodiment 14

Embodiment 14 is another embodiments portentous, its modification blot coat being personal care product provides calendering (calendering) (embossing) of different designs, shape and pattern, such as in embodiment 9,10,11,12 and 13, to increase visual sense of beauty and the captivation to user.

Embodiment 15:

Embodiment 15 is that the substep of embodiment of the method describes, and the method is used for benefit agent composition to be applied to base material of the present invention.

1. nonwoven substrates (TABCW, water thorn, coforming, air-flow method, spunbond, SMS etc.) is untied.

2. the dispersion (preferably) of beneficial agent or solution comprise such as HYPOD8510 or 8102.2, additive (as Lutensol A65N, HPC, cotton linter, silica gel, Unifroth 0154) and water, its through frostproof froth n on the stack (also referred to as exsiccator, heated drum (heated drum) etc.) through heating.

3. heated drum (wrinkling drum, cast iron drum) heated solution transpiring moisture, the solid simultaneously in melt solution/dispersion, is formed in the film coating on heated drum.

4. roll applies pressure, so that film is bonded to nonwoven substrates.

5. film/nonwoven base material is wiped off from drum, to prepare the base material formed through coating, as modification blot coat of the present invention by wrinkling/removal blade.

6. perforate unit discharge by pressing perforate on the base material through coating, to provide side base material via fluid penetrable as the fluid passage of modification blot coat.

7. embossing/stack applies calendering pattern and design to the side base material of fluid penetrable.

8. the substrate material scribbling beneficial agent rolled on winder and be transported to conversion equipment (converting asset), to prepare personal care product of the present invention.

Embodiment 16:

In embodiment 16, first as described in example 15 above, beneficial agent of the present invention is coated in the nonwoven substrates of basic weight relatively low (such as 20gsm or lower), as spunbond base material outer (towards clothing) on the surface.Subsequently interior surface layers is depressed into the base material of fluid impermeable, as the catch of the film of embodiment 2, to form the laminated material of non-woven/film, as the clothing side base material of fluid impermeable of the present invention.

Size disclosed herein and value should not be construed as the exact numerical values recited described in strict restriction.On the contrary, except as otherwise noted, each such size had all not only meant described numerical value but also had meant the functionally equivalent scope around this numerical value.Such as, the size being disclosed as " 40mm " means " about 40mm ".

The All Files quoted in detailed description of the present invention is all introduced into herein as a reference in relevant portion; Quoting of any file should not be understood to admit that it is about prior art of the present invention.Any implication of the term in this penman text or definition with have in any implication of the term by reference and in the file introduced or definition in the meaning of conflicting, the implication should specified with the term in this penman text or definition are as the criterion.

Although illustrate and described specific embodiment of the invention scheme, it will be apparent for a person skilled in the art that under the prerequisite not deviating from the spirit and scope of the present invention, other change various and amendment can have been made.Therefore, in the following claims, intention contains all such changes within the scope of the invention and amendment.

Claims

1. personal care absorbent goods, it comprises at least two base materials, and each base material all has inner surface and outer surface,

Wherein at least one base material is the side base material of fluid penetrable, and it is selected from spunbond, melt-blown, coforming, air-flow method, bonded carded fibre web, water thorn material and combination thereof;

At least one base material is impermeable egative film; And

Be placed in the absorbent cores between described base material;

The at least outer surface of at least one base material wherein said has applied to be selected from compositions of additives, the beneficial agent of enhancement component and combination thereof, wherein said compositions of additives is selected from polyolefin dispersion, polyisoprene dispersion, polybutadiene/styrene block copolymer dispersion, latex dispersion, polyvinylpyrrolidone/styrol copolymer dispersion, the polymeric dispersions of polyvinyl alcohol/vinyl copolymer dispersion and combination thereof, described enhancement component is selected from microgranule, expansiveness microsphere, fiber, other polymeric dispersions, odorant agent, antibacterial, wetting agent, medicine, console agent and combination thereof.

2. personal care absorbent goods according to claim 1, the basic weight of the side base material of wherein said fluid penetrable is about 5gsm to about 200gsm.

3. personal care absorbent goods according to claim 1, the outer surface of at least one base material described in wherein said beneficial agent is attached to through foaming and by creping.

4. personal care absorbent goods according to claim 1, the outer surface of at least one base material wherein said is applied with the beneficial agent of the weighing scale about 3% to about 20% by described base material.

5. personal care absorbent goods according to claim 1, wherein said compositions of additives can by about 50mg/m ²to about 50,000mg/m ²level, be applied on the outer surface of at least one base material described.

6. personal care absorbent goods according to claim 1, wherein said beneficial agent is compositions of additives, and described compositions of additives comprises the polyolefin dispersion of the weighing scale about 10% to about 32% by described beneficial agent.

7. personal care absorbent goods according to claim 1, wherein said beneficial agent is enhancement component.

8. personal care absorbent goods according to claim 6, wherein said beneficial agent is the combination comprising enhancement component further, and described enhancement component is added into described polymeric dispersions with the amount of the weighing scale by described beneficial agent about 0.5% to about 30%.

9. personal care absorbent goods according to claim 1, wherein said compositions of additives is the water-fast polyolefin copolymer being selected from ethylene/acrylic acid copolymer, polyethylene/octene copolymer and combining.

10. personal care absorbent goods according to claim 1, wherein said compositions of additives is selected from the water-soluble polymer of synthesis, natural water-soluble polymer and composition thereof.

11. personal care absorbent goods according to claim 1, the side base material of wherein said fluid penetrable has the absorptive capacity of saline or the menstruation simulation fluid being greater than about 1g/g to about 10g/g.

12. personal care absorbent goods according to claim 1, the side base material of wherein said fluid penetrable provides the multiple perforates extending past described inner surface from described outer surface, leads to described absorbent cores to make fluid.

13. personal care absorbent goods according to claim 1, wherein said goods are the products being selected from feminine hygiene, diaper, training pants and adult incontinence products.

14. personal care absorbent goods according to claim 7, wherein said goods are the products being selected from feminine hygiene, diaper, training pants and adult incontinence products.

15. personal care absorbent goods according to claim 11, wherein said goods are the products being selected from feminine hygiene, diaper, training pants and adult incontinence products.

16. personal care absorbent goods according to claim 1, wherein said beneficial agent does not depart from from the side base material of described fluid penetrable or transfers to user.