EP0251675A2
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EP
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Absorbent structures containing individualized crosslinked fibers and disposable articles incorporating such structures
Assignee: Procter and Gamble Co
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Filing: 1987-06-24
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Granted: —
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Expires: 2007-06-24
Abstract
Abstract Absorbent structures containing individualized, crosslinked fibers. The individualized, crosslinked fibers preferably have between about 0.5 mole % and about 3.5 mole % crosslinking agent, calculated on a cellulose anhydroglucose molar basis, reacted with the fibers in the form of intrafiber crosslink bonds, wherein the crosslinking agent is selected from the group consisting of C₂ - C₈ dialdehydes, C₂ - C₈ dialdehyde acid analogues having at least one aldehyde functionality, and oligomers of such C₂ - C₈ dialdehydes and dialdehyde acid analogues. More preferably, the crosslinking agent is glutaraldehyde, and between about 0.75 mole % and about 2.5 mole % crosslinking agent react to form the intrafiber crosslink bonds. Also preferably, the absorbent structures have actual dry densities greater than their corresponding equilibrium wet densities, and expand upon wetting. The absorbent structures may also contain hydrogel-forming material.
Inventors
- 👤 Walter Lee Dean
- 👤 James William Owens
- 👤 Danny Raymond Moore
- 👤 Howard Leon Schoggen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 01:35
CPC Classifications
D; D01; D01F; D01F8/00; D21; D21C; D21C9/00; D21C9/001; D21C9/002; D21C9/005; A; A61; A61F; A61F13/00; A61F13/15; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; D06; D06M; D06M11/00; D06M11/32; D06M11/36; D06M11/38; D06M13/00; D06M13/322; D06M13/395
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
77 words
An absorbent structure characterized by individualized, crosslinked cellulosic fibers incorporating between 0.5 mole % and 3.5 mole % crosslinking agent, calculated on a cellulose anhydroglucose molar basis, reacted with said fibers in an intrafiber crosslink bond form, wherein said crosslinking agent is selected from C₂-C₈ dialdehydes, C₂-C₈ dialdehyde acid analogues having at least one aldehyde group, and oligomers of said dialdehydes and dialdehyde acid analogues, said fibers having a Water Retention Value (WRV) of less than 60.
Claim 2
Dependent Claim
77 words
An absorbent structure characterized by individualized, crosslinked cellulosic fibers incorporating between 0.5 mole % and 3.5 mole % crosslinking agent, calculated on a cellulose anhydroglucose molar basis, reacted with said fibers in an intrafiber crosslink bond form, wherein said crosslinking agent is selected from C₂-C₈ dialdehydes, C₂-C₈ dialdehyde acid analogues having at least one aldehyde group, and oligomers of said dialdehydes and dialdehyde acid analogues, said fibers having a Water Retention Value (WRV) of less than 60.
Claim 3
Dependent Claim
25 words
An absorbent structure according to claim 1, characterized in that in that said fibers incorporate between 0.75 mole % and 2.5 mole % crosslinking agent.
Claim 4
Dependent Claim
20 words
An absorbent structure, according to either one of claims 1 or 2, characterized in that said crosslinking agent is glutaraldehyde.
Claim 5
Dependent Claim
20 words
An absorbent structure, according to any one of claims 1-3 characterized in that said WRV is between 28 and 50.
Claim 6
Dependent Claim
31 words
An absorbent structure, according to any one of claims 1-4 characterized in that said structure comprises between 10% and 95% individualized crosslinked fibers and between 5% and 90% uncrosslinked cellulosic fibers.
Claim 7
Dependent Claim
25 words
An absorbent structure according to any one of the preceeding claims, characterized in that said structure further comprises a hydrogel-forming material, disposed within said structure.
Claim 8
Dependent Claim
26 words
An absorbent structure, according to claim 6 characterized in that said hydrogel-forming material is substantially homogeneously blended throughout at least a part of said absorbent structure.
Claim 9
Dependent Claim
25 words
An absorbent structure, according to claim 6 characterized in that said hydrogel-forming material is disposed upon a sheet, said sheet being juxtaposed against said fibers.
Claim 10
Dependent Claim
34 words
An absorbent structure, according to any one of the preceding claims characterized in that said structure has a dry density and equilibrium wet density, said dry density being greater than said equilibrium wet density.
Claim 11
Dependent Claim
44 words
An absorbent structure according to any one of the preceding claims characterized in that said absorbent structure has a dry density of between 0.06 g/cc and 0.15 g/cc and said individualized, crosslinked fibers incorporate between 2.0 mole % and 2.5 mole % crosslinking agent.
Claim 12
Dependent Claim
42 words
an absorbent structure according to claim 9 characterized in that said absorbent structure has a dry density of between 0.12 g/cc and 0.60 g/cc and in that said individualized crosslinked fibers incorporate between 0.75 mole % and 1.25 mole % crosslinking agent.
Claim 13
Dependent Claim
40 words
A disposable, absorbent article having a topsheet, a backsheet connected to said topsheet, and an absorbent structure disposed between said topsheet and said backsheet, characterized in that said absorbent structure is in accordance with any one of the preceding claims.
References Cited (Backward Citations)
No citation records indexed.
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