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US 7,078,091 B2Granted
Membranes of polyurethane based materials including polyester polyols
AssigneeNIKE, Inc.
InventorsHenry W Bonk, David J Goldwasser
Life of this patent
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Abstract
The present invention relates to membranes including an urethane including a polyester polyol, wherein the membrane has a gas transmission rate of 15.0 or less for nitrogen gas wherein the membrane has an average thickness of approximately 20.0 mils. Under certain embodiments, the membranes include blends of one or more polyester polyol based thermoplastic urethanes and one or more barrier materials. The membranes can be employed in a variety of applications and can be used as either monolayers or multi-layered laminates.
Claims10
A cushioning device formed from a membrane comprising:
- a thermoplastic polyurethane including a polyester polyol, said polyurethane having a gas transmission rate of less than about 15.0 for nitrogen gas for an average thickness of approximately 20.0 mils.
Dependencies are inferred from the claim text.