Absorbent structure containing individualized, polycarboxylic acid crosslinked wood pulp cellulose fibers
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United States of America Patent
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Aug 11, 1992
Issued Date -
N/A
app pub date -
Oct 17, 1990
filing date -
Nov 7, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed are absorbent structures containing individualized, crosslinked fibers. The individualized, crosslinked fibers preferably have a C.sub.2 -C.sub.9 polycarboxylic acid crosslinking agent reacted with the fibers in the form of intrafiber crosslink bonds. Preferably, the crosslinking agent is citric acid, and between about 0.5 mole % and about 10.0 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.
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