Polytetrafluoroethylene filamentary material

Details Polytetrafluoroethylene filamentary material Polytetrafluoroethylene filamentary material

1994-09-15

1995-11-28

Edwards, N.

Stock material or miscellaneous articles

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

Rod, strand, filament or fiber

428394, 428421, 428422, D02G 300

Patent

active

054706556

ABSTRACT:
A filamentary material of polytetrafluoroethylene (PTFE) having an apparent density of 2.0 g/cc or more, tensile strength of 5 grams/denier or more, tensile elongation at break of 15% or more, high axial orientation and high crystalline content is disclosed. The filamentary material, when analyzed by differential scanning calorimetry, exhibits two endothermic peaks; the ratio of the energy defined by the higher temperature peak to the energy defined by the lower temperature peak being equal to or greater than 2.

REFERENCES:
patent: 3655853 (1972-04-01), Gallup
patent: 3953566 (1976-04-01), Gore
patent: 3962153 (1976-06-01), Gore
patent: 4049589 (1977-09-01), Sakane
patent: 4064214 (1977-12-01), FitzGerald
patent: 5061561 (1979-10-01), Katayama

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