High compressibility gasket material
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United States of America Patent
Stats
-
Feb 13, 1990
Grant Date -
N/A
app pub date -
Oct 4, 1988
filing date -
Oct 4, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
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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