CA2467425A1 - Fluid handling layers made from foam and absorbent articles containing same - Google Patents

Fluid handling layers made from foam and absorbent articles containing same Download PDF

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Publication number
CA2467425A1
CA2467425A1 CA002467425A CA2467425A CA2467425A1 CA 2467425 A1 CA2467425 A1 CA 2467425A1 CA 002467425 A CA002467425 A CA 002467425A CA 2467425 A CA2467425 A CA 2467425A CA 2467425 A1 CA2467425 A1 CA 2467425A1
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Prior art keywords
absorbent article
foam
fluid handling
group
less
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CA002467425A
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French (fr)
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CA2467425C (en
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Andrew Baker
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Paragon Trade Brands LLC
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Individual
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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
    • A61F13/534—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 an inhomogeneous composition through the thickness of the pad
    • A61F13/537—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • A61F13/53743—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterised by the position of the layer relative to the other layers
    • A61F13/53747—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterised by the position of the layer relative to the other layers the layer is facing the topsheet
    • 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
    • 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
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/26—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof
    • 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
    • A61L15/425—Porous materials, e.g. foams or sponges
    • 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

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Materials Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

Absorbent articles (10), such as diapers, incontinence products, training pants, sanitary napkins and the like, providing superior strikethrough and rewet characteristics, and methods of preparing the absorbent articles (10) are disclosed. The absorbent articles (10) comprise at least a topsheet (30) , backsheet (32), absorbent core (34), and fluid handling layer (40), and the article has a third insult Strikethrough of less than about 45 seconds, and a third insult Rewet of less than about 35 grams.

Claims (87)

1. An absorbent article comprising:
a substantially impermeable backsheet;
a permeable topsheet;
an absorbent core disposed between the substantially impermeable backsheet and permeable topsheet; and a fluid handling layer, whereby the fluid handling layer is disposed between the permeable topsheet and the absorbent core, and wherein the absorbent article has a third insult Strikethrough of less than about 45 seconds, and a third insult Rewet of less than about 35 grams.
2. The absorbent article of claim 1, wherein the fluid handling layer is comprised of a polyurethane foam made from at least an aliphatic isocyanate.
3. The absorbent article of claim 1, wherein the fluid handling layer is a foam fluid handling layer comprised of at least one polymer selected from the group consisting of a polyurethane, a polyethylene, a polypropylene, a polyacrylic, a polyamide, a polyvinyl chloride, an epoxy, a polystyrene, a melamine-formaldehyde polymer, and combinations thereof.
4. The absorbent article of claim 1, wherein the fluid handling layer is comprised of at least a polyurethane polymer foam or a melamine-formaldehyde polymer foam material.
5. The absorbent article of claim 3, wherein the polymer is a melamine-formaldehyde polymer.
6. The absorbent article of claim 1, wherein the fluid handling layer is comprised of a foam has a density within the range of from about 20 to about grams/liter.
7. The absorbent article of claim 1, wherein the fluid handling layer is comprised of a foam that additionally comprises a stabilizing agent.
8. The absorbent article of claim 1, wherein the fluid handling layer is comprised of a foam that additionally comprises at least one additive selected from the group consisting of surfactants, fillers, additives, or combinations thereof.
9. The absorbent article of claim 8, wherein the additive is selected from the group consisting of a flame retardant, a reinforcing agent, an auxiliary blowing agent, a medicament, a fragrance, a colorant, a cleaner, an abrasive, and combinations thereof.
10. The absorbent article of claim 1, wherein the absorbent article is selected from the group consisting of a diaper, an incontinent brief, a training pant, a diaper holder, a diaper liner, a sanitary napkin, a hygienic garment, a swimming diaper, or combinations thereof.
11. The absorbent article of claim 1, wherein the third insult Strikethrough is less than about 40 seconds.
12. The absorbent article of claim 11, wherein the third insult Strikethrough is less than about 35 seconds.
13. The absorbent article of claim 1, wherein the third insult Rewet is less than about 30 grams.
14. The absorbent article of claim 13, wherein the third insult Rewet is less than about 25 grams.
15. The absorbent article of claim 2, wherein the aliphatic isocyanate is at least one isocyanate selected from the group consisting of hexamethylene diisocyanate, hexamethylene triisocyanate, bicycloheptane triisocyanate, undecanetriisocyanate, lysine ester triisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, methylcyclohexane diisocyanate, dimethylcyclohexane diisocyanate, xylylene diisocyanate, tetramethylxylylene diisocyanate, their dimers, their trimers, and mixtures thereof.
16. The absorbent article of claim 15, wherein the aliphatic isocyanate is hexamethylene diisocyanate.
17. The absorbent article of claim 2, wherein the aliphatic isocyanate is reacted with a polyester alcohol.
18. The absorbent article of claim 17, wherein the polyester alcohol is a polyetherol having a molecular weight within the range of from about 1,000 to about 6,000 g/mol, and a functionality of from about 2 to about 8.
19. The absorbent article of claim 17, wherein the polyurethane is complexed with a complexing agent selected from the group consisting of ethylenimine, polyethylenimine, polyvinylamine, carboxy-methylated polyethylenimines, phosphono-methylated polyethylenimines, quaternized polyethylenimines and/or dithiocarbamitized polyethylenimines.
20. The absorbent article of claim 19, wherein the complexing agent is a polyethylenimine having a molecular weight within the range of from about 500 to about 30,000 g/mol.
21. The absorbent article of claim 17, wherein the polyester alcohol is selected from the group consisting of polyether polyols, ethylene glycol, propylene glycol, glycerol, hexanetriol, triethanolamine, ethylene oxide, propylene oxide, butylene oxide, polytetramethylene ether glycol, lactone-type polyester polyols, polyol compounds obtained by condensing a dihydric or trihydric alcohol with s hydroxycarboxylic acid, polyol compounds obtained by condensing dicarboxylic acids with diols, condensed polyester polyols obtained by adding acid anhydrides with diols, and mixtures thereof.
22. The absorbent article of claim 17, wherein the aliphatic isocyanate and polyester alcohol are reacted in the presence of a catalyst selected from the group consisting of tin diacetate, tin dioctoate, dialkyltin dilaurate, triethylamine, pentamethyldiethylenetriamine, bis(dimethylaminoethyl) ether, 1,2-dimethylimidazole, dimethylcyclohexylamine, dimethylbenzylamine, triethylenediamine, and mixtures thereof.
23. The absorbent article as claimed in claim 2, wherein the foam has a sink time of more than 20 seconds.
24. The absorbent article as claimed in claim 2, wherein the foam has a liquid up-take of from about 10 to about 30 grams.
25. The absorbent article as claimed in claim 2, wherein the foam has a tensile strength of from about 25 to about 100 kPa.
26. The absorbent article as claimed in claim 2, wherein the foam has a cell size from the top surface of the foam (cell size A) of from about 400 to about 1,000 µm.
27. The absorbent article as claimed in claim 2, wherein the foam has a cell size from the side surface of the foam (cell size B) of from about 300 to about 550 µm.
28. The absorbent article as claimed in claim 2, wherein the foam has a hole diameter within the range of from about 125 to about 400 µm.
29. The absorbent article as claimed in claim 2, wherein the foam as an absolute value change in basis weight from dry basis weight to wet basis weight of less than about 20 g/m2.
30. An absorbent garment comprising:
a substantially impermeable backsheet and a permeable topsheet defining a front waste portion and a rear waste portion, said front waste portion and said rear waste portion cooperating to form a waste opening;
a crotch region formed between the front waste portion and the rear waste portion;
a pair of leg openings on opposed sides of the crotch region;

an absorbent core; disposed between the substantially impermeable backsheet and the permeable topsheet at the crotch region; and a foam fluid handling layer comprising aliphatic isocyanate, whereby the foam fluid handling layer is disposed between the permeable topsheet and the absorbent core, and wherein the absorbent article has a third insult Strikethrough of less than about 45 seconds, and a third insult Rewet of less than about 35 grams.
31. The absorbent article of claim 30, wherein the foam fluid handling layer is a polyurethane foam fluid handling layer made from at least an aliphatic isocyanate.
32. The absorbent article of claim 30, wherein the foam fluid handling layer is comprised of at least one polymer selected from the group consisting of a polyurethane, a polyethylene, a polypropylene, a polyacrylic, a polyamide, a polyvinyl chloride, an epoxy, a polystyrene, a melamine-formaldehyde polymer, and combinations thereof.
33. The absorbent article of claim 30, wherein the foam fluid handling layer is comprised of at least a polyurethane polymer or a melamine-formaldehyde polymer.
34. The absorbent article of claim 32, wherein the polymer is a melamine-formaldehyde polymer.
35. The absorbent article of claim 30, wherein the foam has a density within the range of from about 20 to about 700 grams/liter.
36. The absorbent article of claim 30, wherein the foam additionally comprises a stabilizing agent.
37. The absorbent article of claim 30, wherein the foam additionally comprises at least one additive selected from the group consisting of surfactants, fillers, additives, or combinations thereof.
38. The absorbent article of claim 37, wherein the additive is selected from the group consisting of a flame retardant, a reinforcing agent, an auxiliary blowing agent, a medicament, a fragrance, a colorant, a cleaner, an abrasive, and combinations thereof.
39. The absorbent article of claim 30, wherein the absorbent article is selected from the group consisting of a diaper, an incontinent brief, a training pant, a diaper holder, a diaper liner, a sanitary napkin, a hygienic garment, a swimming diaper, or combinations thereof.
40. The absorbent article of claim 30, wherein the third insult Strikethrough is less than about 40 seconds.
41. The absorbent article of claim 40, wherein the third insult Strikethrough is less than about 35 seconds.
42. The absorbent article of claim 30, wherein the third insult Rewet is less than about 30 grams.
43. The absorbent article of claim 42, wherein the third insult Rewet is less than about 25 grams.
44. The absorbent article of claim 31, wherein the aliphatic isocyanate is at least one isocyanate selected from the group consisting of hexamethylene diisocyanate, hexamethylene triisocyanate, bicycloheptane triisocyanate, undecanetriisocyanate, lysine ester triisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, methylcyclohexane diisocyanate, dimethylcyclohexane diisocyanate, xylylene diisocyanate, tetramethylxylylene diisocyanate, their dimers, their trimers, and mixtures thereof.
45. The absorbent article of claim 44, wherein the aliphatic isocyanate is hexamethylene diisocyanate.
46. The absorbent article of claim 31, wherein the aliphatic isocyanate is reacted with a polyester alcohol.
47. The absorbent article of claim 46, wherein the polyester alcohol is a polyetherol having a molecular weight within the range of from about 1,000 to about 6,000 g/mol, and a functionality of from about 2 to about 8.
48. The absorbent article of claim 46, wherein the polyurethane is complexed with a complexing agent selected from the group consisting of ethylenimine, polyethylenimine, polyvinylamine, carboxy-methylated polyethylenimines, phosphono-methylated polyethylenimines, quaternized polyethylenimines and/or dithiocarbamitized polyethylenimines.
49. The absorbent article of claim 48, wherein the complexing agent is a polyethylenimine having a molecular weight within the range of from about 500 to about 30,000 g/mol.
50. The absorbent article of claim 46, wherein the polyester alcohol is selected from the group consisting of polyether polyols, ethylene glycol, propylene glycol, glycerol, hexanetriol, triethanolamine, ethylene oxide, propylene oxide, butylene oxide, polytetramethylene ether glycol, lactone-type polyester polyols, polyol compounds obtained by condensing a dihydric or trihydric alcohol with s hydroxycarboxylic acid, polyol compounds obtained by condensing dicarboxylic acids with diols, condensed polyester polyols obtained by adding acid anhydrides with diols, and mixtures thereof.
51. The absorbent article of claim 46, wherein the aliphatic isocyanate and polyester alcohol are reacted in the presence of a catalyst selected from the group consisting of tin diacetate, tin dioctoate, dialkyltin dilaurate, triethylamine, pentamethyldiethylenetriamine, bis(dimethylaminoethyl) ether, 1,2-dimethylimidazole, dimethylcyclohexylamine, dimethylbenzylamine, triethylenediamine, and mixtures thereof.
52. The absorbent article as claimed in claim 31, wherein the foam has a sink time of more than 20 seconds.
53. The absorbent article as claimed in claim 31, wherein the foam has a liquid up-take of from about 10 to about 30 grams.
54. The absorbent article as claimed in claim 31, wherein the foam has a tensile strength of from about 25 to about 100 kPa.
55. The absorbent article as claimed in claim 31, wherein the foam has a cell size from the top surface of the foam (cell size A) of from about 400 to about 1,000 µm.
56. The absorbent article as claimed in claim 31, wherein the foam has a cell size from the side surface of the foam (cell size B) of from about 300 to about 550 µm.
57. The absorbent article as claimed in claim 31, wherein the foam has a hole diameter within the range of from about 125 to about 400 µm.
58. The absorbent article as claimed in claim 31, wherein the foam as an absolute value change in basis weight from dry basis weight to wet basis weight of less than about 20 g/m2.
59. A method of preparing an absorbent article comprising:
providing a topsheet material and a backsheet material;
disposing between the topsheet and backsheet materials an absorbent core;
disposing between the topsheet and the absorbent core a fluid transport layer, whereby the absorbent article has a third insult Strikethrough of less than about 45 seconds, and a third insult Rewet of less than about 35 grams.
60. The method of claim 59, wherein the fluid handling layer is a polyurethane foam fluid handling layer made from at least an aliphatic isocyanate.
61. The method of claim 59, wherein the fluid handling layer is a foam fluid handling layer comprised of at least one polymer selected from the group consisting of a polyurethane, a polyethylene, a polypropylene, a polyacrylic, a polyamide, a polyvinyl chloride, an epoxy, a polystyrene, a melamine-formaldehyde polymer, and combinations thereof.
62. The method of claim 59, wherein the fluid handling layer is comprised of at least a polyurethane polymer foam or a melamine-formaldehyde polymer foam material.
63. The method of claim 61, wherein the polymer is a melamine-formaldehyde polymer.
64. The method of claim 59, wherein the fluid handling layer is comprised of a foam having a density within the range of from about 20 to about 700 grams/liter.
65. The method of claim 59, wherein the fluid handling layer comprises a foam that additionally comprises a stabilizing agent.
66. The method of claim 59, wherein the fluid handling layer comprises a foam that additionally comprises at least one additive selected from the group consisting of surfactants, fillers, additives, or combinations thereof.
67. The method of claim 66, wherein the additive is selected from the group consisting of a flame retardant, a reinforcing agent, an auxiliary blowing agent, a medicament, a fragrance, a colorant, a cleaner, an abrasive, and combinations thereof.
68. The method of claim 59, wherein the absorbent article is selected from the group consisting of a diaper, an incontinent brief, a training pant, a diaper holder, a diaper liner, a sanitary napkin, a hygienic garment, a swimming diaper, or combinations thereof.
69. The method of claim 59, wherein the third insult Strikethrough is less than about 40 seconds.
70. The method of claim 69, wherein the third insult Strikethrough is less than about 35 seconds.
71. The method of claim 59, wherein the third insult Rewet is less than about 30 grams.
72. The method of claim 71, wherein the third insult Rewet is less than about 25 grams.
73. The method of claim 60, wherein the aliphatic isocyanate is at least one isocyanate selected from the group consisting of hexamethylene diisocyanate, hexamethylene triisocyanate, bicycloheptane triisocyanate, undecanetriisocyanate, lysine ester triisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, methylcyclohexane diisocyanate, dimethylcyclohexane diisocyanate, xylylene diisocyanate, tetramethylxylylene diisocyanate, their dimers, their trimers, and mixtures thereof.
74. The method of claim 73, wherein the aliphatic isocyanate is hexamethylene diisocyanate.
75. The method of claim 60, wherein the aliphatic isocyanate is reacted with a polyester alcohol.
76. The method of claim 75, wherein the polyester alcohol is a polyetherol having a molecular weight within the range of from about 1,000 to about 6,000 g/mol, and a functionality of from about 2 to about 8.
77. The method of claim 75, wherein the polyurethane is complexed with a complexing agent selected from the group consisting of ethylenimine, polyethylenimine, polyvinylamine, carboxy-methylated polyethylenimines, phosphono-methylated polyethylenimines, quaternized polyethylenimines and/or dithiocarbamitized polyethylenimines.
78. The method of claim 77, wherein the complexing agent is a polyethylenimine having a molecular weight within the range of from about 500 to about 30,000 g/mol.
79. The absorbent article of claim 75, wherein the polyester alcohol is selected from the group consisting of polyether polyols, ethylene glycol, propylene glycol, glycerol, hexanetriol, triethanolamine, ethylene oxide, propylene oxide, butylene oxide, polytetramethylene ether glycol, lactone-type polyester polyols, polyol compounds obtained by condensing a dihydric or trihydric alcohol with s hydroxycarboxylic acid, polyol compounds obtained by condensing dicarboxylic acids with diols, condensed polyester polyols obtained by adding acid anhydrides with diols, and mixtures thereof.
80. The method of claim 75, wherein the aliphatic isocyanate and polyester alcohol are reacted in the presence of a catalyst selected from the group consisting of tin diacetate, tin dioctoate, diallcyltin dilaurate, triethylamine, pentamethyldiethylenetriamine, bis(dimethylaminoethyl) ether,1,2-diinethylimidazole, dimethylcyclohexylamine, dimethylbenzylamine, triethylenediamine, and mixtures thereof.
81. The method as claimed in claim 60, wherein the foam has a sink time of more than 20 seconds.
82. The method as claimed in claim 60, wherein the foam has a liquid up-take of from about 10 to about 30 grams.
83. The method as claimed in claim 60, wherein the foam has a tensile strength of from about 25 to about 100 kPa.
84. The method as claimed in claim 60, wherein the foam has a cell size from the top surface of the foam (cell size A) of from about 400 to about 1,000 µm.
85. The method as claimed in claim 60, wherein the foam has a cell size from the side surface of the foam (cell size B) of from about 300 to about 550 um.
86. The method as claimed in claim 60, wherein the foam has a hole diameter within the range of from about 125 to about 400 µm.
87. The method as claimed iii claim 60, wherein the foam as an absolute value change in basis weight from dry basis weight to wet basis weight of less than about 20 g/m2.
CA2467425A 2001-11-15 2002-11-15 Fluid handling layers made from foam and absorbent articles containing same Expired - Lifetime CA2467425C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/987,762 2001-11-15
US09/987,762 US6852905B2 (en) 2001-11-15 2001-11-15 Fluid handling layers made from foam and absorbent articles containing same
PCT/US2002/036742 WO2003043531A2 (en) 2001-11-15 2002-11-15 Fluid handling layers made from foam and absorbent articles containing same

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Publication Number Publication Date
CA2467425A1 true CA2467425A1 (en) 2003-05-30
CA2467425C CA2467425C (en) 2011-01-04

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US (1) US6852905B2 (en)
AU (1) AU2002366085A1 (en)
CA (1) CA2467425C (en)
MX (1) MXPA04004624A (en)
WO (1) WO2003043531A2 (en)

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AU2002366085A1 (en) 2003-06-10
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