Process of making PTFE fibers
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United States of America Patent
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Nov 11, 1997
Grant Date -
N/A
app pub date -
May 21, 1996
filing date -
May 31, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides high strength fiber of polytetrafluoroethylene (PTFE) having a strength of at least 0.5 GPa, which is manufactured by forming a monofilament of PTFE group polymer by paste extrusion, free end annealing the monofilament, and subsequently drawing the annealed monofilament to form the fiber, wherein PTFE molecular chains are oriented in a direction parallel to an axial direction of the fiber.
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