High strength fiber of polytetrafluoroethylene and a method for manufacturing the same
AssigneeHitachi Cable, Ltd.
InventorMasazumi Shimizu
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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.
Claims4
High strength fiber of polytetrafluoroethylene produced by free end annealing and subsequent drawing of a monofilament of polytetrafluoroethylene group polymer which is formed by paste extrusion, wherein molecular chains of said polytetrafluoroethylene are oriented to a direction parallel to an axial direction of said fiber, and a thermogram of said polytetrafluoroethylene fiber after said drawing has only one endothermic peak at approximately 341.degree. C. and a substantially flat absorption trail in a temperature range of approximately 350.degree.-390.degree. C.
Dependencies are inferred from the claim text.