Non-linting composite gauze material
AssigneeUnited Foam Plastics Corporation
InventorsPaul F. Hermann, Joel S. Wildstein, Henry B. Sprague
Life of this patent
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Abstract
A durable hydrophilic substantially non-linting water absorbent drapable composite material useful as wound dressing comprises cellulose fibers coated with hydrophilic polymer. The cellulose fibers may be open weave cotton gauze. The hydrophilic polymer may comprise a polyurethane foam prepolymer, such as a toluene diisocyanate terminated polyethylene glycol, optimally containing a surfactant. Alternatively, the polymer may comprise a polyethylene oxide, a carboxymethyl cellulose, or a polyvinylpyrrolidone. The water to prepolymer weight ratio of the polyurethane embodiment preferably is within the range of from about 6:1 to about 400:1. The hydrophilic polymer may be a polyethylene oxide carboxymethyl cellulose mixture.
Claims14
A durable substantially lint-free water-absorbent drapable non-toxic composite material comprising:
- an open weave cellulose fiber material having warp threads and fill threads defining open spaces therebetween;
- and
- a hydrophilic polymer coating on said threads said coating comprising a polyurethane polymer having a thickness sufficient to leave said open spaces within said material bounded by said threads and serving substantially to prevent cellulose fiber loss from said threads during use of said material.
A durable substantially lint-free water-absorbent drapable non-toxic composite material comprising:
- an open weave cellulose fiber material having warp threads and fill threads defining open spaces therebetween;
- and
- a hydrophilic polymer film coating on said threads, said coating comprising polyvinylpyrrolidone and being of a thickness sufficient to leave said open spaces within said material bounded by said threads and serving substantively to prevent cellulose fiber loss from said threads during use of said material.
A durable substantially lint free water absorbant drapable non-toxic composite material comprising:
- an open-weave cellulose fiber material having warp threads and fill threads defining open spaces therebetween;
- and
- a hydrophilic polymer film coating on said threads, said coating comprising a carboxy methyl cellulose polymer having a thickness sufficient to leave said open spaces within said material bounded by said threads and serving substantively to prevent cellulose fiber loss from said threads during use of said material.
A durable, substantially lint-free water-absorbent drapable non-toxic composite material comprising:
- an open weave cellulose fiber material having warp threads and fill threads defining open spaces therebetween;
- and
- a hydrophilic polymer film coating on said threads, said coating comprising a polyethylene oxide polymer having a thickness sufficient to leave said open spaces within said material bounded by said threads and serving substantially to prevent cellulose fiber loss from said threads during use of said material.
A durable substantially lint-free water-absorbent drapable non-toxic composite material comprising:
- an open weave cellulose fiber material having warp threads and fill threads defining open spaces therebetween;
- and
- a hydrophilic polymer coating on said threads comprising a water-soluble polymer which forms a hydrophilic continuous film having a thickness sufficient to leave said open spaces within said material bounded by said threads wherein the polymer coating allows water absorption by the material up to about 4.5 times greater than uncoated cellulose fiber material, and prevents cellulose fiber loss from said threads during sue of said materials.
Dependencies are inferred from the claim text.