Polyetrafluoroethylene compositions
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United States of America Patent
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Jan 13, 1998
Grant Date -
N/A
app pub date -
Jan 10, 1996
filing date -
Sep 2, 1994
priority date (Note) -
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Abstract
In the present invention a blend of resin composition and blending technique is optimized to provide a desired balance of node size and fibril length with the additional property of thermal stability in the resulting stretched material. The stretched blend can be described as a polytetrafluoroethylene porous material having a microstructure of nodes interconnected by fibrils in which the material comprises a blend of two different polytetrafluoroethylenes, one polytetrafluoroethylene being a homopolymer of tetrafluoroethylene and the other polytetrafluoroethylene being a modified polymer of tetrafluoroethylene.
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