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US 6,287,658 B1Granted
Flexible composite suitable as packaging material
AssigneeE. I. Du Pont de Nemours and Company
InventorsSteven R. Cosentino, Wesley K. Seiverd
Life of this patent
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Abstract
A wound roll suitable as a packaging material contains in order a release coating, a flexible polyester film, an adhesive, a flexible polymeric film support and a cold seal adhesive.
Claims23
A wound roll of a flexible composite suitable as a packaging material comprising in order:
- (a) a release coating formed from a water-soluble or water-dispersible composition comprising a perfluoroalkyl acrylate polymer and a film forming polymer wherein the perfluoroalkyl acrylate polymer is present in an amount of from 5 to 100% by weight of the film forming polymer and wherein the film forming polymer is selected from the group consisting of polyvinyl alcohol, starch, polyvinyl acetate, polyamides, polyvinyl pyrrolidone, poly (2-ethyl-2-oxazoline), polyvinyl chloride, and polyethyleneimine;
- (b) a flexible polyester support for the release layer;
- (c) an adhesive;
- (d) a flexible polymeric film support;
- (e) a cold seal adhesive, wherein the release layer and cold seal adhesive contact one another in the wound roll.
2 more elements
A wound roll of a flexible composite suitable as a packaging material comprising in order:
- (a) a release coating formed from a water-soluble or water-dispersible composition comprising a perfluoroalkyl acrylate polymer and a film forming polymer wherein the perfluoroalkyl acrylate polymer is present in an amount of from 5 to 100% by weight of the film forming polymer;
- (b) a flexible polyester support for the release layer;
- (c) an adhesive which is melt extruded polyethylene;
- (d) a flexible polymeric film support;
- (e) a cold seal adhesive, wherein the release layer and cold seal adhesive contact one another in the wound roll.
2 more elements
Dependencies are inferred from the claim text.