Thermally stable polytetrafluoroethylene fiber and method of making same
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United States of America Patent
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Mar 3, 2009
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N/A
app pub date -
Jun 14, 2007
filing date -
Jun 13, 2007
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Abstract
A dispersion spun polytetrafluoroethylene fiber exhibiting improved elongation prior to fiber break and increased thermal stability, the fiber prepared by forming a spin mix containing a dispersion of poly(tetrafluoroethylene) particles, forming an intermediate fluoropolymer fiber structure from the spin mix, sintering the intermediate fluoropolymer fiber structure and forming a continuous fluoropolymer filament yarn, drawing the continuous fluoropolymer filament yarn, and thereafter heat setting the continuous fluoropolymer filament yarn.
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