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Membranes of polyurethane based materials including polyester polyols

  • US 6,013,340 A
  • Filed: 12/12/1995
  • Issued: 01/11/2000
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Term
First Claim
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1. A flexible membrane comprising:

  • a polyurethane including a polyester polyol, said membrane having a gas transmission rate of 15.0 or less for nitrogen gas;

    wherein said membrane is sealed and in an inflated state.

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