Gasket material
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United States of America Patent
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Feb 23, 2010
Grant Date -
Nov 10, 2005
app pub date -
Apr 7, 2005
filing date -
Apr 7, 2004
priority date (Note) -
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Abstract
A gasket material comprising polytetrafluoroethylene (PTFE) and a thermoplastic polymer having a melting point lower than the melting point of PTFE. Preferred thermoplastic polymers comprise fluorinated thermoplastic polymers, and most preferred fluorinated thermoplastic polymers comprise fluorinated ethylene propylene and perfluoroalkoxy copolymer. The PTFE component preferably comprises full density PTFE, and a filler material may optionally be added. The PTFE component is present in the gasket material in an amount from approximately 50% to less than 100%, based on the total weight of the gasket material, and the thermoplastic polymer is present in an amount from greater than 0% to approximately 20%, based on the total weight of the gasket material.
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