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US 5,560,986 AGranted
Porous polytetrafluoroethylene sheet composition
AssigneeW. L. Gore & Associates, Inc.
InventorWilliam P. Mortimer, Jr.
Life of this patent
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Abstract
A composite of a thermoplastic copolymer of tetrafluoroethylene and perfluoro(propyl vinyl ether), and a porous membrane of polytetrafluoroethylene, at least a portion of the thermoplastic copolymer being dispersed within the pores of the porous polytetrafluoroethylene. The composite is useful as insulation for wire and cable.
Claims3
An electrical insulative tape which comprises:
- (a) a porous membrane of stretched polytetrafluoroethylene in which the pores are defined by a structural network of nodes interconnected by fibrils;
- and
- (b) moieties of a thermoplastic copolymer of tetrafluoroethylene and perfluoro(propyl vinyl ether) dispersed within said pores.
Dependencies are inferred from the claim text.