Regenerated cellulose sponge
AssigneeAvicon, Inc.
InventorsOrlando A. Battista, Richard L. Ward
Life of this patent
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Abstract
Regenerated cellulose sponges of increased absorbency and rate of absorption formed by impregnating the sponge material with a solution or dispersion containing from 0.005% to 0.25% of a water-soluble or water-dispersible, high molecular weight, hydrophylic, film-forming polymer, drying the impregnated sponge and compressing it. The presence of the film-forming polymer allows the cutting of desired shaped individual sponges from the treated sponge material with a minimal formation of lint particles on the cut surfaces.
Claims6
A compressed regenerated cellulose sponge consisting essentially of regenerated cellulose and from abot 0.15 to about 2.5% of a water-soluble or water-dispersible, high molecular weight, hydrophylic, film-forming polymer uniformly distributed throughout the sponge, the sponge being characterized in absorbing at least 25 times its weight of water and having a bulk density of at least 7 lbs./cu. ft. and, in contrast to a like regenerated cellulose sponge free of such film-forming polymer, exhibiting an increased liquid absorbency and, upon wetting, exhibiting a reduced lint formation along cut surfaces and, in contrast to a like regenerated cellulose sponge coated with such film-forming polymer, exhibiting an increased liquid absorbency.
Dependencies are inferred from the claim text.