Method of making high compressibility gasket material

Details Method of making high compressibility gasket material Method of making high compressibility gasket material

1989-11-15

1990-10-09

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Stratified or layered articles

264112, 264127, B29C 6502, B32B 2706

Patent

active

049618911

ABSTRACT:
A highly compressible gasket material is formed by fusing two filled sheets of PTFE containing dispersed microballoons to a central unfilled sheet of PTFE which provides tensile strength to the material. The two unfilled sheets each constitute from 20% to 25% of the overall thickness of the gasket material. This method provides a unitary gasket assembly having an overall compressibility of 45% or more, but the thicker unfilled PTFE central area of the assembly provides excellent recovery characteristics and resistance to creep relaxation.

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patent: 4042747 (1977-08-01), Breton et al.
patent: 4153661 (1979-05-01), Ree et al.
patent: 4364884 (1982-12-01), Traut

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