EP0339461B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Absorbent products containing hydrogels with ability to swell against pressure
Assignee: Kimberly Clark Worldwide Inc
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Filing: 1989-04-19
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Granted: 1993-01-20
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Expires: 2009-04-19
Abstract
No abstract record available.
Inventors
- 👤 Stanley Roy Kellenberger
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 17:01
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/531; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/60; A61F13/15203; A61F2013/15284; A61F2013/530481; A61F2013/530489; A61F2013/530569; A61F2013/5307; A61F2013/530708; A61F13/84; A61F2013/8488; A61F2013/8491
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
109 words
An absorbent composite (16) comprising a porous fiber matrix (18) and an amount of superabsorbent material (20) present in said porous fiber matrix, characterized in that said superabsorbent material (20) can absorb at least 24 milliliters of an aqueous solution of sodium chloride containing 0.9 weight percent, sodium chloride, per gram of superabsorbent material while under a restraining pressure of at least 21,000 dynes per square centimeter, provided that, when in the form of discrete particles, at least about 50%, by weight, of said superabsorbent material has a size in the unswollen condition which is greater than the median pore size of said porous fiber matrix (18) when wet.
Claim 2
Dependent Claim
47 words
The absorbent composite of claim 1, wherein said superabsorbent material can absorb at least 27 milliliters of an aqueous solution of sodium chloride containing 0.9 weight percent, sodium chloride, per gram of superabsorbent material while under a restraining pressure of at least 21,000 dynes per square centimeter.
Claim 3
Dependent Claim
49 words
The absorbent composite according to claim 1 wherein said superabsorbent material (20) can absorb at least 29 milliliters of an aqueous solution of sodium chloride containing 0.9 weight percent sodium chloride, per gram of superabsorbent material while under a restraining pressure of at least 21,000 dynes per square centimeter.
Claim 4
Dependent Claim
49 words
The absorbent composite according to claim 1 wherein said superabsorbent material (20) can absorb at least 32 milliliters of an aqueous solution of sodium chloride containing 0.9 weight percent sodium chloride, per gram of superabsorbent material while under a restraining pressure of at least 21,000 dynes per square centimeter.
Claim 5
Dependent Claim
22 words
The absorbent composite according to any one of claims 1 to 4, wherein the porous fiber matrix (1) comprises wood pulp fluff.
Claim 6
Dependent Claim
31 words
The absorbent composite according to any of claims 1 to 5, wherein the porous fiber matrix (18) has a density of from about 0.03 to about 0.4 grams per cubic centimeter.
Claim 7
Dependent Claim
32 words
The absorbent composite according to any one of claims 1 to 5, wherein the porous fiber matrix (18) has a density of from about 0.1 to about 0.15 grams per cubic centimeter.
Claim 8
Dependent Claim
40 words
The absorbent composite according to any one of claims 1 to 7, wherein the composite comprises superabsorbent material (20) in an amount of from about 5 to about 80 weight percent based on total weight of the absorbent composite (16).
Claim 9
Dependent Claim
40 words
The absorbent composite according to any one of claims 1 to 7, wherein the composite (16) comprises superabsorbent material (20) in an amount of from about 10 to about 60 weight percent, based on total weight of the absorbent composite.
Claim 10
Dependent Claim
24 words
The absorbent composite according to any one of claims 1 to 9, wherein the superabsorbent material (20) is in the form of discrete particles.
Claim 11
Dependent Claim
29 words
The absorbent composite according to claim 10, wherein at least about 50%, by weight, of the superabsorbent material (20) has a particle size of at least about 100 microns.
Claim 12
Dependent Claim
29 words
The absorbent composite according to claim 10, wherein at least about 50%, by weight, of the superabsorbent material (20) has a particle size of at least about 150 microns.
Claim 13
Dependent Claim
56 words
The absorbent composite according to any one of claims 1 to 9, wherein the superabsorbent material (20) is in the form of fibers having a length to diameter ratio of at least 5:1, further wherein at least about 50%, by weight, of said superabsorbent fibers have a geometric mean diameter of at least about 33 microns.
Claim 14
Dependent Claim
29 words
The absorbent composite according to claim 13, wherein at least about 50%, by weight, of said superabsorbent fibers have a geometric mean diameter of at least about 67 microns.
Claim 15
Dependent Claim
41 words
The absorbent composite according to any one of claims 1 to 14, wherein at least about 80%, by weight, of said superabsorbent material (20) has a size greater than the median pore size of said porous fiber matrix (18) when wet.
Claim 16
Dependent Claim
27 words
The absorbent composite according to claim 15, wherein at least about 80%, by weight, of the superabsorbent material has a size of at least about 100 microns.
Claim 17
Dependent Claim
36 words
The absorbent composite according to any one of claims 1 to 16, wherein said porous fiber matrix (18) comprises at least about 3%, by weight, based on total fiber matrix weight, of a synthetic polymeric fiber.
Claim 18
Dependent Claim
47 words
A diaper comprising a liquid-permeable facing material (14) adapted to contact the skin of the wearer, and a liquid-impermeable backing material (12) opposite said liquid-permeable facing material (14), characterized in that said diaper further comprises an absorbent composite according to any one of claims 1 to 17.
References Cited (Backward Citations)
No citation records indexed.
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