Fluororesin foam
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United States of America Patent
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Aug 23, 1994
Grant Date -
N/A
app pub date -
Feb 22, 1993
filing date -
Feb 22, 1993
priority date (Note) -
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Abstract
Perfluorotripentylamine, perfluoropolyether or another such high-boiling liquid is added as a foaming agent to a thermoplastic fluororesin such as a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin or a tetrafluoroethylene-hexafluoropropylene copolymer resin. Because the vapor pressure of said foaming agent in the molten fluororesin is lower than that of Freon or another such low-boiling foaming agent, the cells in the foam can be made fine and uniform in diameter.
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