High tenacity phenolic resin fibers

Details High tenacity phenolic resin fibers High tenacity phenolic resin fibers

1978-05-22

1980-06-10

Danison, Walter C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

264176F, 525505, 525508, 528481, 528502, C08G 810, C08G 828

Patent

active

042074088

ABSTRACT:
Infusible cured phenolic resin fibers of the present invention have a birefringence of at least 2.times.10.sup.-3 with the x-ray diffraction pattern of the fibers showing an amorphous halo. The tenacity of infusible cured phenolic resin fibers is significantly increased by subjecting the fibers to sufficient longitudinal tension as to cause at least about 30% elongation of the fibers. The Young's modulus of elasticity of the fibers is also significantly increased thereby. Preferably the resulting stretched infusible cured phenolic resin fibers have a tenacity of at least about 4 g./den.

REFERENCES:
patent: 2091965 (1937-09-01), Cherry
patent: 2101642 (1937-12-01), Elbel et al.
patent: 2212509 (1940-08-01), Cherry
patent: 2376511 (1945-05-01), Saunders et al.
patent: 3088794 (1963-05-01), Bonner
patent: 3650102 (1972-03-01), Economy et al.
patent: 3651199 (1972-03-01), Blume et al.
patent: 3716521 (1973-02-01), Economy et al.
patent: 3848044 (1974-11-01), Hagiwara et al.

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