High strength fiber of polytetrafluoroethylene and a method for

Details High strength fiber of polytetrafluoroethylene and a method for High strength fiber of polytetrafluoroethylene and a method for

1995-05-26

1996-10-08

Edwards, Newton

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

428394, 428422, 57700, 57907, D02G 300

Patent

active

055629873

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.

REFERENCES:
patent: 2776465 (1957-01-01), Smith
patent: 4064214 (1977-12-01), Fitzgerald
patent: 4096227 (1978-06-01), Gore
patent: 5061561 (1991-10-01), Katayama
patent: 5209251 (1993-05-01), Curtis et al.
Journal of Polymer Science: Polymer Physics Edition vol. 20, 751-761 (1982).
Journal of Polymer Science: The Density of Amorphous PTFE vol. 20, 2159-2161 (1982).

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