Herstellungsverfahren für Dichtungsmaterial und hochkomprimierbare Abdichtung.

摘要

A highly compressible gasket material is formed by fusing two filled sheets (10) (12) of PTFE containing dispersed microballoons to a central unfilled sheet (14) of PTFE which provides tensile stength to the material. The two unfilled sheets (10) (12) 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 (14) of the assembly provides excellent recovery characteristics and resistance to creep relaxation.