WO2000037015A1 - Absorbent article with release liner for pressure-sensitive adhesive - Google Patents
Absorbent article with release liner for pressure-sensitive adhesive Download PDFInfo
- Publication number
- WO2000037015A1 WO2000037015A1 PCT/EP1999/009880 EP9909880W WO0037015A1 WO 2000037015 A1 WO2000037015 A1 WO 2000037015A1 EP 9909880 W EP9909880 W EP 9909880W WO 0037015 A1 WO0037015 A1 WO 0037015A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- adhesive
- back sheet
- release
- absorbent product
- protection system
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/56—Supporting or fastening means
- A61F13/58—Adhesive tab fastener elements
- A61F13/60—Adhesive tab fastener elements with release means associated with tab fasteners
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/56—Supporting or fastening means
- A61F13/5605—Supporting or fastening means specially adapted for sanitary napkins or the like
- A61F13/5611—Supporting or fastening means specially adapted for sanitary napkins or the like using fastening strips, e.g. adhesive, on the undergarment-facing side
Definitions
- the present invention concerns a protection system for an absorbent product such as an incontinence pad, sanitary pad, sanitary napkin, diaper, or the like, wherein the protection system comprises a protective strip releasably adhered to a back sheet of the absorbent product by means of an adhesive.
- a protective strip preferably made of a silicone treated material and designed to be adhered to and released from the back sheet of said disposable absorbent product.
- Protection systems for adhesion means generally comprise the combination of at least two materials which are temporarily adhered together, i.e. a protective material and one or more adhesion means associated with the surface or a layer of another material.
- the protective material for absorbent products is generally a release tape component having a low adhesion release surface or layer.
- Such protection systems may also be systems which allow re-attachment over a plurality of attachment/release cycles.
- Known systems commonly comprise a pressure-sensitive adhesive in the form of one or more lines of adhesive applied to the back sheet of the absorbent product, the adhesive being protected by a release strip typically made of paper.
- Prior art products of the aforementioned type are known for example from US-A-4701178 , US-A-4217901, US-A- 3888255 and US-A-5593750.
- Such attachment systems should of course be designed in such a way that the user is able to peel the release strip away from the absorbent product without requiring too great a force.
- the force is too high, this can lead to tearing of the release strip during removal.
- the release strip material tears the remainder of the release strip on the adhesive often provides no leading edge which can be grasped so as to allow complete removal from the adhesive.
- the already exposed adhesive sticks to the user' s fingers or clothing when trying to remove the remaining strip parts which can lead in the product becoming wrinkled and in most cases ruined. This often leads to the product being discarded.
- too great a force can also result in removal of areas of the pressure sensitive adhesive from the back sheet, leaving thus an incomplete adhesive layer on the back sheet, which is clearly undesirable .
- the release force which the user requires to peel the release strip away from the underlying back sheet should not be too low. If the force is too low, the user is left with the impression that there is insufficient adhesive force in the exposed adhesive to maintain the absorbent product securely in place during movement. The user in such cases often discards the product believing the adhesive to be defective and unable to perform its function.
- the object of the present invention is to provide a solution to the aforementioned problem.
- a further object of the present invention is to make the protection system independent of the adhesive type, its pattern on the absorbent product, the back sheet material or the release strip material.
- the protection system instead should be defined by release force characteristics.
- One of the advantages of the present invention is therefore that almost any variation of an absorbent product, in terms of its materials or the type of adhesives used, can be adopted since it is possible to adapt the protection system to meet the required release force characteristics in many different ways.
- the release force can be altered by changing the width of the adhesion surface, or its thickness.
- the type of adhesion means used can be altered in addition to the width and thickness dimensions.
- Many other modifications of the various available parameters will be understood by the skilled man as allowing a means by which the release force range defined in the claims can be obtained. Once the range is known, the skilled man merely needs to perform simple tests to alter the materials, adhesive, patterns or dimensions of same so as to arrive at a release force within the range.
- the prevent invention provides a solution to the aforementioned problems during release of a release strip from a back sheet of an absorbent product by means of a protection system as defined in claim 1.
- adheresive as used herein is intended to imply either a double faced adhesive tape, a tacky surface texture, or coating of, or treatment of, a back sheet, which has the effect of increasing its adherence to a surface or layer, and especially to the user's underwear.
- the width of the lines of adhesive means and the surface weight of adhesives may depend on the properties of the adhesive used.
- an increase in the width of the lines of adhesive means will generally lead to an increase of the force needed to release the adhered surfaces and, for the same adhesive, an increase of the surface weight of the adhesive on the back sheet will generally lead to an increase in the adhesive force.
- the length of the lines of adhesive means only depend on the length of the surfaces or layer to be attached together and need not affect the attachment force characteristics .
- Fig.l illustrates a partly cut-away perspective view of a typical disposable sanitary pad in accordance with the invention, prior to use, the back sheet surface intended for placement against the garment being shown uppermost and on which three lines of pressure-sensitive adhesive are indicated, the adhesive lines being protected by a single peelable, protective strip shown in an almost fully removed position;
- Fig.2 illustrates a cross-sectional view taken on line II-II of the sanitary pad of Fig.l, where the cutaway portion of Fig. 1 has been reinserted so as to show the side connection of the top sheet and back sheet.
- the protection system of the invention preferably comprises a disposable absorbent product 1 such as an incontinence pad, sanitary pad, sanitary napkin, diaper or other . absorbent product for absorbing body exudate.
- the absorbent product has an absorbent core 2 enveloped between a top sheet or liner 3 (shown lowermost) and a back sheet 4.
- the absorbent product 1 is shown as being in the form of a generally planar pad, although the pad may be arched.
- the absorbent core 2 may be made up of any suitable absorbent material known in the art, such as loosely associated absorbent hydrophilic material like cellulose fibres, e.g. wood pulp, regenerated cellulose or cotton fibres, which may be chemically or physically modified.
- the absorbent element 2 may also include other natural or synthetic materials, such as foams or polymers.
- the absorbent product 1 may also comprise layers of materials which are fluid permeable or fluid impermeable.
- the top sheet 3 is a fluid permeable and may be formed of a variety of materials including cellulose, regenerated cellulose, polyester or other synthetic polymers, together with polymeric fibres or films. This is provided on the body-facing side of the absorbent element 2, the sheet 3 being provided for comfort and comformability and directing the fluid to the underlying absorbent element 2.
- the back sheet 4 normally comprises a fluid impermeable barrier material, and has the purpose of preventing body fluid from passing through the core onto the undergarment of the wearer is provided on the garment-facing side of the absorbent element 2.
- This barrier may be any polymeric film such as polyethylene, polypropylene, or cellophane or may be a normally fluid-pervious material that has been treated to be impervious, such as a fluid repellent paper. Other fluid impermeable materials are also known in the art.
- One suitable material for the back sheet 4 is for example a 22 ⁇ m thick sheet made by Trioplanex International having product reference ME1148.
- top sheet 3 and back sheet 4 may be joined together at their peripheries.
- An adhesive 5 here shown in the form of three lines of adhesive, overlies a portion of the external, garment-facing back sheet 4 for attaching the absorbent product 1 to an undergarment.
- the adhesive 5 is preferably a pressure sensitive adhesive and which is preferably laminated to the back sheet 4. Pressure sensitive adhesives are preferred due to their ease of use, which in particular allows the absorbent product to be attached to the user' s undergarment and, if the initial replacement is not correct, to be replaced easily in a new position.
- the material of the adhesion means 5 can be for example any of a large number of pressure-sensitive adhesives that are commercially available, including the cold, pressure-sensitive adhesives such as the acrylate adhesives, generally combined with tackifiers such as polyterpenes, or the rapid-setting thermoplastic adhesives (or hot melt adhesives) such as styrene and butadiene copolymers. Other ingredients such as fillers, antioxidants and pigments may be included.
- the adhesive 5 may also comprise a double faced adhesive tape or another type of adhesive.
- adhesion means in accordance with the present invention may have various patterns, such as for example spots, squares, single full or intermittent lines or multiple full or intermittent lines, which may be parallel or not. Other patterns are also possible.
- the surface weight of adhesive disposed on the external, garment-facing surface or layer of the absorbent product 1 may vary, for example in dependence on the specific adhesive used, but will generally be 60 g/m 2 or lower due to commercial requirements and because larger amounts may provide other problems of too high adhesive forces when attached to the user's undergarment.
- a surface weight of between about 15 and 60 g/m 2 of adhesive will generally be used and a range between 15 and 40 g/m 2 is preferable.
- the length of the adhesive pattern can be varied according to the length of the final product and does not affect the release force which is necessary for peeling of the release strip 5 from the back sheet 4 to which it is adhered.
- the adhesive 5 is protected by a peelable, protective strip 6, provided to protect the adhesive during storage and handling prior to use.
- a protective strip may be made of a paper for example that has been treated so as to be readily releasable from the adhesive element, e.g. a paper strip treated with silicone.
- Such protective strips are well-known in the art and do not require further explanation here .
- the particular properties of the release force of the protection system can be determined by the measurement of the release force using an Instron 1122, 4301 or 4464 tensile tester connected to a plotter and an integrator and using a 10 N cell. The test procedure is explained below.
- samples must first be stored for at least 24 hours before the test, and maintained during the test, in a climate chamber at 50 ⁇ 5% relative humidity and 23° ⁇ 2°C.
- the tensile tester is first calibrated and then set up for a pulling speed of 500mm/min and a pulling length of 120 mm.
- the fixing length is adjusted such that the pulling angle between the strip 6 and the back sheet 4 during the test will be 90°, which is maintained due to the movable lower fixture .
- the absorbent product is then fixed to the tensile tester by way of two metal paper clamps (minimum 50 mm wide clamps, whereby the minimum width is effectively determined by the total width of the adhesive pattern on the tested sample) , which are used to fix the sanitary towel to a flat fixture or sled.
- the testing equipment is then set to allow 90° measurement in the lower fixture thereof.
- the release strip is attached to the upper clamp of the tensile tester. If necessary, tape may be used to extend between the tensile tester upper clamp and the release strip. The angle of 90° (i.e. the pulling angle) is then checked.
- the test is started and the mean adhesion (release force) over a distance of 100 mm is recorded. To avoid the effects of the starting moment, the measurements after the first 10 mm are used and the test is stopped when 10 mm pulling distance remains.
- the test is repeated on identical samples so as to obtain the required consistency of results and to obtain a mean adhesion value, i.e. a release force value.
- a value for the release force of between 0.5 and 1 N has to be obtained.
- This value is an absolute value, which must be present irrespective of parameters like the pattern or width of the adhesive. With the knowledge of this invention, the skilled man will therefore be able to alter the materials, width or other properties of existing products so as to produce a protection system having the required release force characteristics .
- the sanitary napkin of the example has the general construction of that illustrated in Figs. 1 and 2.
- the pressure-sensitive adhesive in the example is a hot melt thermoplastic type and consists of a blend of a block copolymer, synthetic resins and plasticisers . It is sold by Collano, Switzerland, under the trade name ECOMELT H145.
- the surface weight of adhesive disposed on the external, garment-facing surface of the absorbent product is 29 g/m 2 .
- the adhesive pattern comprises three lines of adhesive 12 mm wide, separated by a 11 mm gap, the total width being 58 mm.
- the release strip is a paper strip having a width of 64 mm and a surface weight of 48 gm "2 produced by Lohjan Paperi Oy under product code number ESP 48 and the back sheet material is a 22 ⁇ m thickness material sold by Trioplanex International under product name ME 1148.
- the measurement of the release force of this protection system has shown that this product corresponds to the criteria set forth in the present invention.
- the invention is not limited to any particular materials or types of glue, but may be varied within the scope of the appended claims.
- the present invention has been described with reference to a specific product in a specific arrangement and configurations, such is not to be considered limitative of the invention but merely illustrative thereof.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29924029U DE29924029U1 (en) | 1998-12-22 | 1999-12-14 | Protection system for adhesive devices of an absorption product |
EP99963518A EP1143904A1 (en) | 1998-12-22 | 1999-12-14 | Absorbent article with release liner for pressure-sensitive adhesive |
AU19783/00A AU1978300A (en) | 1998-12-22 | 1999-12-14 | Absorbent article with release liner for pressure-sensitive adhesive |
DE29924030U DE29924030U1 (en) | 1998-12-22 | 1999-12-14 | Absorbent product with a protected attachment system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98124512.9 | 1998-12-22 | ||
EP98124512 | 1998-12-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000037015A1 true WO2000037015A1 (en) | 2000-06-29 |
Family
ID=8233222
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/009880 WO2000037015A1 (en) | 1998-12-22 | 1999-12-14 | Absorbent article with release liner for pressure-sensitive adhesive |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1143904A1 (en) |
AU (1) | AU1978300A (en) |
DE (1) | DE29924029U1 (en) |
WO (1) | WO2000037015A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002045639A1 (en) * | 2000-12-08 | 2002-06-13 | Sca Hygiene Products Ab | An absorbent article having means for positioning the article in the underwear of the wearer |
US6783519B2 (en) | 2000-12-08 | 2004-08-31 | Sca Hygiene Products Ab | Absorbent article having means for positioning the article in the underwear of the wearer |
US6797365B2 (en) | 2002-04-08 | 2004-09-28 | Kimberly-Clark Worldwide, Inc. | Laminate having differential bond strengths and absorbent article made therefrom |
WO2006071159A1 (en) * | 2004-12-30 | 2006-07-06 | Sca Hygiene Products Ab | Absorbent article comprising a uv-curing adhesive and method for its production |
WO2006071161A1 (en) * | 2004-12-30 | 2006-07-06 | Sca Hygiene Products Ab | Absorbent article comprising a uv-curing adhesive |
WO2006111436A1 (en) * | 2005-04-22 | 2006-10-26 | Huhtamaki Forchheim Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co Kg | Cover film |
CZ303664B6 (en) * | 2000-09-06 | 2013-02-20 | Johnson & Johnson Industria E Comercio Ltda | Sanitary towel |
WO2013030688A2 (en) * | 2011-09-02 | 2013-03-07 | Kimberly-Clark Worldwide, Inc. | Body attached absorbent article donning system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5242726A (en) * | 1991-09-23 | 1993-09-07 | Minnesota Mining And Manufacturing Company | Pattern-coated anchorage system for porous film |
US5459193A (en) * | 1993-10-12 | 1995-10-17 | H. B. Fuller Licensing & Financing, Inc. | Polystyrene-ethylene/butylene-polystyrene hot melt adhesive |
GB2298627A (en) * | 1992-12-10 | 1996-09-11 | Kao Corp | Wrapping structure for sanitary napkin |
US5649921A (en) * | 1990-10-16 | 1997-07-22 | Nitto Denko Corporation | Paper diaper release part structure having an interfacial boundary constituted by a pressure-sensitive adhesive layer and a silicone-based release layer, a diaper containing a specific release part structure, and a method for reducing peeling noise |
EP0880954A1 (en) * | 1996-02-14 | 1998-12-02 | Nitto Denko Corporation | Item-packaging sheet for sanitary napkins and sanitary napkins packaged in said sheet |
-
1999
- 1999-12-14 DE DE29924029U patent/DE29924029U1/en not_active Expired - Lifetime
- 1999-12-14 WO PCT/EP1999/009880 patent/WO2000037015A1/en not_active Application Discontinuation
- 1999-12-14 AU AU19783/00A patent/AU1978300A/en not_active Abandoned
- 1999-12-14 EP EP99963518A patent/EP1143904A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5649921A (en) * | 1990-10-16 | 1997-07-22 | Nitto Denko Corporation | Paper diaper release part structure having an interfacial boundary constituted by a pressure-sensitive adhesive layer and a silicone-based release layer, a diaper containing a specific release part structure, and a method for reducing peeling noise |
US5242726A (en) * | 1991-09-23 | 1993-09-07 | Minnesota Mining And Manufacturing Company | Pattern-coated anchorage system for porous film |
GB2298627A (en) * | 1992-12-10 | 1996-09-11 | Kao Corp | Wrapping structure for sanitary napkin |
US5459193A (en) * | 1993-10-12 | 1995-10-17 | H. B. Fuller Licensing & Financing, Inc. | Polystyrene-ethylene/butylene-polystyrene hot melt adhesive |
EP0880954A1 (en) * | 1996-02-14 | 1998-12-02 | Nitto Denko Corporation | Item-packaging sheet for sanitary napkins and sanitary napkins packaged in said sheet |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CZ303664B6 (en) * | 2000-09-06 | 2013-02-20 | Johnson & Johnson Industria E Comercio Ltda | Sanitary towel |
EP1190691B2 (en) † | 2000-09-06 | 2016-11-30 | Johnson & Johnson Industrial Ltda. | Intimate napkin |
US6783519B2 (en) | 2000-12-08 | 2004-08-31 | Sca Hygiene Products Ab | Absorbent article having means for positioning the article in the underwear of the wearer |
WO2002045639A1 (en) * | 2000-12-08 | 2002-06-13 | Sca Hygiene Products Ab | An absorbent article having means for positioning the article in the underwear of the wearer |
US6797365B2 (en) | 2002-04-08 | 2004-09-28 | Kimberly-Clark Worldwide, Inc. | Laminate having differential bond strengths and absorbent article made therefrom |
WO2006071159A1 (en) * | 2004-12-30 | 2006-07-06 | Sca Hygiene Products Ab | Absorbent article comprising a uv-curing adhesive and method for its production |
WO2006071161A1 (en) * | 2004-12-30 | 2006-07-06 | Sca Hygiene Products Ab | Absorbent article comprising a uv-curing adhesive |
WO2006111436A1 (en) * | 2005-04-22 | 2006-10-26 | Huhtamaki Forchheim Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co Kg | Cover film |
WO2013030688A2 (en) * | 2011-09-02 | 2013-03-07 | Kimberly-Clark Worldwide, Inc. | Body attached absorbent article donning system |
WO2013030688A3 (en) * | 2011-09-02 | 2013-05-02 | Kimberly-Clark Worldwide, Inc. | Body attached absorbent article donning system |
US9132049B2 (en) | 2011-09-02 | 2015-09-15 | Kimberly-Clark Worldwide, Inc. | Body attached absorbent article donning system |
GB2506565B (en) * | 2011-09-02 | 2018-01-10 | Kimberly Clark Co | Body attached absorbent article donning system |
US10076453B2 (en) | 2011-09-02 | 2018-09-18 | Kimberly-Clark Worldwide, Inc. | Body attached absorbent article donning system |
Also Published As
Publication number | Publication date |
---|---|
DE29924029U1 (en) | 2001-09-27 |
AU1978300A (en) | 2000-07-12 |
EP1143904A1 (en) | 2001-10-17 |
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