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WO2000078369A1 - Structure absorbante du type airlaid - Google Patents

Structure absorbante du type airlaid Download PDF

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Publication number
WO2000078369A1
WO2000078369A1 PCT/US2000/016563 US0016563W WO0078369A1 WO 2000078369 A1 WO2000078369 A1 WO 2000078369A1 US 0016563 W US0016563 W US 0016563W WO 0078369 A1 WO0078369 A1 WO 0078369A1
Authority
WO
WIPO (PCT)
Prior art keywords
absorbent structure
foam
weight
particles
polyurethane foam
Prior art date
Application number
PCT/US2000/016563
Other languages
English (en)
Inventor
Charles F. Schroer, Jr.
Original Assignee
Foamex L.P.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Foamex L.P. filed Critical Foamex L.P.
Priority to AU54934/00A priority Critical patent/AU5493400A/en
Publication of WO2000078369A1 publication Critical patent/WO2000078369A1/fr

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
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/531—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/60—Liquid-swellable gel-forming materials, e.g. super-absorbents
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H13/00—Other non-woven fabrics
    • 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
    • A61F13/15203—Properties of the article, e.g. stiffness or absorbency
    • A61F2013/15284—Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties
    • A61F2013/15406—Basis weight
    • 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
    • A61F13/15203—Properties of the article, e.g. stiffness or absorbency
    • A61F2013/15284—Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties
    • A61F2013/15463—Absorbency
    • 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
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530802—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterized by the foam or sponge other than superabsorbent
    • A61F2013/53081—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterized by the foam or sponge other than superabsorbent with special pore dimension or arrangement

Definitions

  • This invention relates to an nonwoven web structure made by combining together foam particles or fragments or strands of foam cells and wood pulp fibers,
  • foam particles or wood pulp fibers optionally with superabsorbent polymers (SAP).
  • SAP superabsorbent polymers
  • the combination of foam particles and wood pulp fibers is airlaid using conventional air-lay equipment to form the nonwoven web structure.
  • foam particles or wood pulp fibers are airlaid using conventional air-lay equipment to form the nonwoven web structure.
  • foam particles or wood pulp fibers are airlaid using conventional air-lay equipment to form the nonwoven web structure.
  • Absorbent airlaid layers in many absorbent articles are formed from airlaid wood pulp fibers.
  • conventional airlaid equipment such as offered by DAN
  • WEB WEB
  • a desired amount of wood pulp is fed to a hammer mill, where it is beaten and opened up to form a network of wood pulp fibers. These fibers are carried by blown
  • SAP superabsorbent polymers
  • thermoplastic layer of desired thickness.
  • the layer is compressed, and sometimes a binder is added, to hold the structure together.
  • nonwoven "airfelt” is then transferred from the screen and incorporated into the construction of a diaper or catamenial pad or other absorbent product.
  • Patent No. 5,849,805 proposes forming an absorbent foam by polymerizing high internal phase emulsions (HIPEs) and using that foam, preferably in sheet form, as a component of an absorbent article.
  • HIPEs high internal phase emulsions
  • the Dyer patent does not disclose forming an absorbent core using polyurethane foam particles alone or in combination with wood pulp fiber to form an absorbent layer.
  • blowing agent to form a dispersion. Then the blowing agent is expanded and the
  • Nan Phan prefers to use the superabsorbent polymer foam in sheet form as a layer in the absorbent core in the diaper or sanitary napkin.
  • the foam layer may be formed on top of an airlaid pulp fiber web (Col. 38, lines 5-24). Van Phan also
  • Van Phan refers to U.S. Patent No. 4,610,678 (Weisman). Weisman discloses a process for making an absorbent structure by air-laying a mixture of hydrophilic fibers (such as cellulose or wood pulp, rayon and polyester fibers) and particles of water-insoluble hydrogel. The Weisman patent does not disclose forming an absorbent structure by air-laying a mixture of hydrophilic fibers (such as cellulose or wood pulp, rayon and polyester fibers) and particles of water-insoluble hydrogel. The Weisman patent does not disclose forming an absorbent structure by air-laying a mixture of hydrophilic fibers (such as cellulose or wood pulp, rayon and polyester fibers) and particles of water-insoluble hydrogel. The Weisman patent does not disclose forming an
  • absorbent core using polyurethane foam particles alone or in combination with wood pulp fiber.
  • An absorbent structure is formed from a plurality of polyurethane foam
  • the foam is ground to particles of 0.40 to 2.6 mm.
  • the resulting ground particles generally are fragments of foam cells or foam cell struts, but
  • foams may also be a combination of complete foam cells and partial foam cell fragments. It is also acceptable to use foams with pore sizes from 60 to 90 pores per linear inch by grinding such foams to particles of 0.40 to 2.6 mm as the longest dimension.
  • the nonwoven web formed with the polyurethane foam particles or fragments formed with the polyurethane foam particles or fragments
  • the open-celled foam can be reticulated to remove the windows that form
  • the foam cell struts in a typical open-celled polyurethane foam. Because the polyurethane foam forms dodecahedron-shaped cells (with twelve sides), the cell struts are interconnected together and form bent angles and bent
  • the foam cell Unlike wood pulp fibers, which form "two-dimensional" flexible fibers of defined width that are cut to desired length and do not have bent angles, the foam cell
  • foam particles and foam strands creates an open network of voids into which
  • the absorbent structure is made by
  • the foam may be any foam particles and wood pulp fibers into a nonwoven web.
  • the foam may be any foam particles and wood pulp fibers into a nonwoven web.
  • the foam is hydrophobic
  • hydrophilic foam may also be used.
  • the wood pulp and foam particles or particles and strands are mixed together to form the nonwoven web.
  • the web is formed by air-laying the wood pulp fibers and foam particles.
  • the foam particles may range from 10% by weight to 90% by weight of the nonwoven web.
  • fibers may range from 90% by weight to 10% by weight of the nonwoven web.
  • a binder may be added to hold the web together.
  • the fibers may range from 90% by weight to 10% by weight of the nonwoven web.
  • a binder may be added to hold the web together.
  • polyurethane foam may be formed with a superabsorbent polymer incorporated into
  • the combined wood pulp and foam particles or foam cell fragments form an inter-locking network.
  • fragments serves to separate the wood pulp fibers to form voids or channels into which liquid may flow and be retained.
  • FIG. 1 is a top plan view of a prior art multi-layered absorbent pad product
  • FIG. 2 is a fragmental cross-sectional view of the prior art pad product taken along line 2-2 of FIG. 1;
  • FIG. 3 is a top plan view of a multi-layered absorbent pad product showing the
  • FIG. 4 is a fragmental cross-sectional view of the pad product taken along line 4-4 of FIG. 3;
  • FIG. 5 is an enlarged schematic view showing a typical orientation of wood
  • FIG. 6 is an enlarged perspective view of a reticulated foam cell
  • FIG. 7 is an enlarged perspective view of a network of reticulated foam cells
  • FIG. 8 is an enlarged perspective view of fragments of reticulated foam cells.
  • FIG. 9 is an enlarged schematic view showing the combination of airlaid wood
  • the absorbent structure of the invention may be incorporated into a variety of
  • FIG. 1 shows a prior art feminine hygiene pad product 10 having a generally
  • FIG. 1 shows the top plan
  • FIG. 2 is a diagrammatic representation of the pad 10 with the several layers of the core portion 16 broken away.
  • a perforated top sheet 18 comprises the top surface of the core portion 16.
  • the perforated top sheet 18 defines perforations 20. Liquid contacting the top surface
  • the perforated top sheet has a hydrophilic character on its top surface and a hydrophobic character on its bottom surface so that liquid penetrating through the
  • perforations 20 does not readily reverse its flow direction to rewet the top surface.
  • Some prior art absorbent pad structures use a nonwoven sheet as the top sheet in place of an apertured or perforated top sheet.
  • sheet 22 is formed from airlaid wood pulp fibers. Liquid passing through the
  • air felt wood pulp core 24 is formed from a single discrete layer of air felt that is
  • superabsorbent particles 28 The combination of wood pulp core 24 and superabsorbent polymer particles 28 absorbs and retains liquids collected by the core
  • a liquid impermeable back sheet 30 is below the absorbent air felt wood pulp
  • This sheet prevents liquid held within the core portion 16 from penetrating
  • Pressure-sensitive, hot melt adhesive (not shown) is applied to the outer
  • a feminine hygiene pad 40 that incorporates
  • the pad is of
  • the absorbent core portion 46 is shown from the top in FIG. 3 and in cross-sectional
  • FIG. 4 The various layers of the core portion 46 are shown partially broken
  • the top surface of the pad 40 is a perforated top sheet
  • top sheet 48 is absorbed into the airfelt transfer sheet 52 and delivered to the absorbent
  • the absorbent core structure 54 according to the invention is a web formed
  • wood pulp fibers 56 and foam particles 58 and/or foam cell fragments 60 from a mixture of wood pulp fibers 56 and foam particles 58 and/or foam cell fragments 60.
  • fragments 60 are mixed together in an air handler and airlaid against a screen to form
  • foam cell strands 60 entangle with the wood pulp fibers 56 to create void volumes and channels to transport and hold liquid and improve wicking
  • a liquid impermeable backing sheet 62 is positioned below the absorbent
  • the absorbent structure 54 according to the invention may be made in different
  • strands (or a combination of these) together with water and binder to form a slurry that may be wet-formed into a non- woven web.
  • Another way would be to combine the wood pulp fibers and foam particles or foam cell strands with a binder and compress this mixture in a mold. While under
  • the binder is cured with heat or steam to form the molded product. Portions of the molded product are then peeled away to form a layer that may be used
  • the wood pulp fibers and foam particles or foam cell Preferably, however, the wood pulp fibers and foam particles or foam cell
  • strands are mixed together in a dry state, transferred to a vacuum screen, optionally
  • wood pulp fibers are strands with consistent diameters that may be cut to desired lengths. Weyerhauser soft pine and bleached Southern pine pulp fibers have been found particularly suitable for used when making the absorbent
  • wood pulp fibers such as International Paper soft pine wood pulp fibers, may be used.
  • Polyurethane foam cells have interconnected struts 72 that form
  • foam is reticulated.
  • Particles of the foam which may contain a number of foam cells in an interconnected network as shown in FIG. 7, may be used to form the absorbent
  • the resilient foam cells define and retain void volumes to absorb
  • Foam cell fragments also may be used to form the absorbent structure
  • foam cell fragments are mixed together to form the nonwoven web. Foam cell fragments are shown prior to mixing in FIG. 8.
  • FIG. 9 shows a schematic view of an absorbent structure according to the
  • the bent foam cell fragments have a three-dimensional
  • nonwoven web absorbent structures according to the invention may be improved by incorporating superabsorbent polymer into the polyurethane foam before the foam is ground into foam cell particles or foam cell fragments.
  • superabsorbent polymer into the polyurethane foam before the foam is ground into foam cell particles or foam cell fragments.
  • the polyurethane foam is formed with a polyol dispersion that includes one or more
  • the superabsorbent polymer may also be coated onto the exterior surface of the foam cell particles or foam cell fragments before forming the foam cell particles or foam cell fragments.
  • Representative superabsorbent polymers that may be used include NORSOCRYL S35 available from Elf Atochem, CHEMDAL ASAP 2000 and 2001
  • the polyurethane foam may be formed with polyether or polyester polyols, although the final end use may dictate the preferred system.
  • Polyurethane foams may be formed with cell sizes in the range of from 3 to 150 pores per linear inch. We have found that the coarse-celled foams, with pore sizes from 10 to 30 pores per linear inch work best when ground to form foam cell
  • fragments/particles have a mean particle size in the range of 0.70 to 2.6 mm.
  • fragments/particles have a mean particle size in the range of 0.10 to 2.6 mm.
  • foams may be used in the invention.
  • the foams may be ground to desired particle sizes or foam cell fragment sizes to achieve desired results.
  • the longest dimension from tip to tip is up to 2.6 mm, measuring the longest dimension from tip to tip.
  • fragmented particles have a mean particle size in the range of 0.40 to 2.6 mm.
  • Sanitary napkins using the present absorbent structures may be derived from known sanitary napkins simply by replacing the absorbent core of the known napkins with the absorbent structure according to this
  • the absorbent structures used in sanitary napkins preferably have a thickness of from about 1 to 3 mm, more preferably about
  • absorbent structures of thickness less than 1 mm could be
  • An example of a sanitary napkin comprises a hydrophobic top sheet, a transfer
  • top sheets, bottom sheets and transfer layers are known in the art. See, e.g., U.S. Pat. No. 3,871,378 (Duncan).
  • Amounts are indicated as parts by weight based on 100 parts polyol.
  • foam particles and/or foam cell fragments were mixed together with wood pulp fibers in an air handler.
  • Dan- Web airlay equipment Using Dan- Web airlay equipment,
  • the mixture was carried by air to rest upon a mesh screen and then was sprayed with a
  • Desired density for the examples was from 0.1 to 1.0 g/cm 3 , although other densities in the
  • the absorbent structure formed was placed into an absorbent article (a feminine hygiene pad) and tested against a control.
  • the control was a Proctor &
  • Absorbency Rate is a measure of the time in seconds for a 10 ml quantity of a pigmented 0.9% saline solution to completely penetrate the top sheet of an absorbent
  • Wicking is a measure of the longitudinal distance that a 10 ml. quantity of pigmented 0.9% saline solution travels along the absorbent core of the absorbent
  • Retention is a measure of the amount of pigmented 0.9% saline solution that transfers from an absorbent product that has received 10 ml. of solution
  • a stop watch was started just as the liquid was poured. After five minutes, ten layers of Whatman #4 filter paper (of known tare weight) are placed on the surface of the absorbent article over the cross- sectional area at which the solution had been poured. A load of 0.5 psi was placed on top of the stack of filter paper.
  • Example 1 is the control, a P&G ALWAYS
  • Percentages are expressed as percent by weight of the absorbent structure. 0.092" screen yielded particles of 0.015" or 0.38 mm size. 0.032" screen yielded fragments of 0.005" or 0.127 mm size.
  • Desired properties for an absorbent structure according to the invention are (a) fast

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Hematology (AREA)
  • Materials Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Textile Engineering (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

L'invention concerne une structure absorbante (54) se présentant sous la forme d'une bande non tissée constituée de plusieurs particules (58) de mousse polyuréthanne. Lesdites particules de mousse (58) peuvent comporter des cellules complètes, des groupes de cellules ou des fragments de cellules (60). Ladite structure absorbante peut également se présenter sous la forme d'une bande non-tissée constituée de plusieurs fils de base de cellules de mousse polyuréthane. Dans un mode de réalisation de l'invention, les particules de mousse (58) ou les fils de base (60) de cellules de mousse ou un mélange de particules et de fils de base, sont combinés à des fibres de pâte de bois (56), de manière qu'une bande non-tissée (54) soit formée. Des combinaisons comprenant 10 % en poids de mousse et 90 % en poids de pâte de bois, jusqu'à 90 % en poids de mousse et 10 % en poids de pâte de bois, peuvent être utilisées pour la formation de la structure absorbante. Eventuellement, un liant est ajouté à la bande. De plus, un polymère superabsorbant (SAP) est éventuellement ajouté au composant polyol avant la formation de la mousse, laquelle est ensuite broyée pour que des particules de mousse ou des fils de base de cellules de mousse utilisés dans la bande non-tissée soient formés. Des mousses polyuréthannes classiques généralement hydrophobes et non traitées, présentant une dimension des pores comprise entre 10 pores par pouce linéaire et 150 pores par pouce linéaire, peuvent être utilisées pour la formation de la bande non-tissée.
PCT/US2000/016563 1999-06-21 2000-06-15 Structure absorbante du type airlaid WO2000078369A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU54934/00A AU5493400A (en) 1999-06-21 2000-06-15 Absorbent airlaid structure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US32819599A 1999-06-21 1999-06-21
US09/328,195 1999-06-21

Publications (1)

Publication Number Publication Date
WO2000078369A1 true WO2000078369A1 (fr) 2000-12-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/016563 WO2000078369A1 (fr) 1999-06-21 2000-06-15 Structure absorbante du type airlaid

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Country Link
AU (1) AU5493400A (fr)
WO (1) WO2000078369A1 (fr)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003051412A1 (fr) * 2001-12-14 2003-06-26 Kimberly-Clark Worldwide, Inc. Matieres absorbantes possedant des proprietes absorbantes ameliorees
WO2003057964A1 (fr) * 2001-12-21 2003-07-17 Kimberly-Clark Worldwide, Inc. Bande non tissee comportant un revetement superabsorbant
US6689934B2 (en) 2001-12-14 2004-02-10 Kimberly-Clark Worldwide, Inc. Absorbent materials having improved fluid intake and lock-up properties
US6709613B2 (en) 2001-12-21 2004-03-23 Kimberly-Clark Worldwide, Inc. Particulate addition method and apparatus
US6846448B2 (en) 2001-12-20 2005-01-25 Kimberly-Clark Worldwide, Inc. Method and apparatus for making on-line stabilized absorbent materials
WO2006094977A3 (fr) * 2005-03-09 2006-11-30 Basf Ag Mousse hyperabsorbante, procede de fabrication et utilisation
NL1029775C2 (nl) * 2005-08-22 2007-02-26 Design & Polymers B V Olie-absorberende deken en werkwijze ter vervaardiging daarvan.
EP1562648A4 (fr) * 2002-10-29 2008-04-02 Biopol Co Ltd Compresse en mousse de polyurethane pour pansement pour cavite de plaie et son procede de fabrication
US7732039B2 (en) 2001-12-20 2010-06-08 Kimberly-Clark Worldwide, Inc. Absorbent article with stabilized absorbent structure having non-uniform lateral compression stiffness
US7777091B2 (en) 2006-12-19 2010-08-17 Biopol Co., Ltd. Polyurethane foam dressing with improved moisturization
WO2018004709A1 (fr) * 2016-06-30 2018-01-04 Kimberly-Clark Worldwide, Inc. Article absorbant présentant un composite de mousse et de fibres
US10729600B2 (en) 2015-06-30 2020-08-04 The Procter & Gamble Company Absorbent structure
US10729592B2 (en) 2015-11-04 2020-08-04 The Procter & Gamble Company Absorbent structure
US11020289B2 (en) 2015-11-04 2021-06-01 The Procter & Gamble Company Absorbent structure
US11173078B2 (en) 2015-11-04 2021-11-16 The Procter & Gamble Company Absorbent structure
US11266542B2 (en) 2017-11-06 2022-03-08 The Procter & Gamble Company Absorbent article with conforming features
US11376168B2 (en) 2015-11-04 2022-07-05 The Procter & Gamble Company Absorbent article with absorbent structure having anisotropic rigidity
US11919678B1 (en) * 2020-06-09 2024-03-05 Keia T. Pile Absorbent storage bag liner
US11998432B2 (en) 2016-06-30 2024-06-04 Kimberly-Clark Worldwide, Inc. Method of manufacturing a foam and fiber composite

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GB1058932A (en) * 1962-08-04 1967-02-15 Bayer Ag Paper-like elements
US4182649A (en) * 1976-02-09 1980-01-08 W. R. Grace & Co. Polyurethane foam sheet and method
US4395332A (en) * 1978-07-07 1983-07-26 Max Klein Adsorption and filtration mat for liquids
US4610678A (en) * 1983-06-24 1986-09-09 Weisman Paul T High-density absorbent structures
US5840780A (en) * 1996-07-01 1998-11-24 Woodbridge Foam Corporation Foamed polymer and process for production thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1058932A (en) * 1962-08-04 1967-02-15 Bayer Ag Paper-like elements
US4182649A (en) * 1976-02-09 1980-01-08 W. R. Grace & Co. Polyurethane foam sheet and method
US4395332A (en) * 1978-07-07 1983-07-26 Max Klein Adsorption and filtration mat for liquids
US4610678A (en) * 1983-06-24 1986-09-09 Weisman Paul T High-density absorbent structures
US5840780A (en) * 1996-07-01 1998-11-24 Woodbridge Foam Corporation Foamed polymer and process for production thereof

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6689934B2 (en) 2001-12-14 2004-02-10 Kimberly-Clark Worldwide, Inc. Absorbent materials having improved fluid intake and lock-up properties
US6706944B2 (en) 2001-12-14 2004-03-16 Kimberly-Clark Worldwide, Inc. Absorbent materials having improved absorbent properties
WO2003051412A1 (fr) * 2001-12-14 2003-06-26 Kimberly-Clark Worldwide, Inc. Matieres absorbantes possedant des proprietes absorbantes ameliorees
US7732039B2 (en) 2001-12-20 2010-06-08 Kimberly-Clark Worldwide, Inc. Absorbent article with stabilized absorbent structure having non-uniform lateral compression stiffness
US6846448B2 (en) 2001-12-20 2005-01-25 Kimberly-Clark Worldwide, Inc. Method and apparatus for making on-line stabilized absorbent materials
WO2003057964A1 (fr) * 2001-12-21 2003-07-17 Kimberly-Clark Worldwide, Inc. Bande non tissee comportant un revetement superabsorbant
US6709613B2 (en) 2001-12-21 2004-03-23 Kimberly-Clark Worldwide, Inc. Particulate addition method and apparatus
US7777090B2 (en) 2002-10-29 2010-08-17 Biopol Co., Ltd. Polyurethane foam dressing for wound filler and method for manufacturing thereof
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