High compressibility gasket material

Details High compressibility gasket material High compressibility gasket material

1988-10-04

1990-02-13

Lesmes, George F.

Stock material or miscellaneous articles

Composite

Of polyisocyanurate

428325, B32B 2706, B32B 516

Patent

active

049006290

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.

REFERENCES:
patent: 2299805 (1942-10-01), Denman
patent: 2584959 (1952-02-01), Yocum et al.
patent: 3524794 (1970-09-01), Jonnes et al.
patent: 3901315 (1975-08-01), Parker et al.

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