Fluid barrier membranes
AssigneeNIKE, Inc.
InventorsHenry W. Bonk, David J. Goldwasser, Paul H. Mitchell
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Abstract
The invention provides amembrane that includes as a gas-barrier component a polyester polyol-modified polyurethane, the polyester polyol portion having repeating units in which the total number of carbon atoms is about eight or less. The membrane has a gas transmission rate of 15.0 or less for nitrogen gas.
Claims20
A durable membrane comprising at least one layer having a polymeric gas barrier component consisting essentially of a thermoplastic polyester polyol-modified polyurethane,
- said membrane having a gas transmission rate of 15.0 or less for nitrogen gas, wherein said polyester polyol has repeating units in which the total number of carbon atoms is about eight or less;
- and
- said membrane being a free-standing, flexible film.
A bladder comprising a membrane, wherein said membrane comprises as a gas-barrier component a polyester polyol-modified polyurethane, said membrane having a gas transmission rate of 15.0 or less for nitrogen gas wherein said polyester polyol has repeating units in which the total number of carbon atoms is about eight or less.
Dependencies are inferred from the claim text.