High compressibility gasket material and method of making...

Details High compressibility gasket material and method of making... High compressibility gasket material and method of making...

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B32B 27/06 (2006.01) B29C 65/02 (2006.01) B29C 67/04 (2006.01) F16J 15/10 (2006.01) F16L 49/04 (2006.01)

Patent

CA 1337873

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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