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US 5,650,225 AGranted
Three-dimensional, seamless waterproof breathable flexible composite material
AssigneeW. L. Gore & Associates, Inc.
InventorsAnit Dutta, Robert Lyon Henn
Life of this patent
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Abstract
Waterproof, breathable, flexible, seamless shaped articles, such as gloves or socks, are described which are made of a flexible layered composite comprising: (a) a microporous thermoplastic polyester polyurethane or polyether polyurethane that is water vapor permeable, and (b) a nonporous copolymer that is waterproof but water vapor permeable which provides improved waterproofness to the microporous polymer layer.
Claims5
A shaped article consisting of:
- (a) a seamless three-dimensional layered composite that is flexible, waterproof, and water vapor permeable in which;
- (b) the composite consists of:
- (i) a microporous, elastomeric, thermoplastic polyester or polyether-polyurethane layer I that is water vapor permeable;
- and
- (ii) a continuous, nonporous elastomeric polymer layer II selected from the class consisting of a copolyetherester, a copolyetheresteramide, and a polyurethane, said polymer being waterproof and water vapor permeable.
2 more elements
Dependencies are inferred from the claim text.