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US 6,203,868 B1Granted
Barrier members including a barrier layer employing polyester polyols
AssigneeNIKE, Inc.
InventorsHenry W. Bonk, David J. Goldwasser, Paul H. Mitchell
Life of this patent
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Abstract
The present invention relates to barrier membranes including a barrier layer which includes one or more thermoplastic urethane formed from polyester polyols. More particularly, the membranes include a barrier layer including blends of one or more polyester polyol based thermoplastic urethanes and one or more copolymers of ethylene and vinyl alcohol. The barrier membranes can be employed in a variety of applications and can be used as either monolayers or multi-layered laminates.
Claims20
A barrier membrane, comprising:
- a first flexible barrier layer including a blend of at least one copolymer of ethylene and vinyl alcohol and at least one thermoplastic polyurethane, said polyurethane formed from a polyester polyol,
- wherein said barrier membrane is sealed and inflated with a gas toward which said barrier membrane has a transmission rate value of about 10 or less.
Dependencies are inferred from the claim text.