Absorbent structure containing individualized, crosslinked...

Details Absorbent structure containing individualized, crosslinked... Absorbent structure containing individualized, crosslinked...

D - Textiles, Paper

21

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154/115, 252/23

D21H 11/00 (2006.01) A61L 15/28 (2006.01) D06M 13/395 (2006.01) D21C 9/00 (2006.01)

Patent

CA 1292217

ABSORBENT STRUCTURE CONTAINING INDIVIDUALIZED, CROSSLINKED FIBERS 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.

540366

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