Carbon fiber made from acrylic fiber and process for production

Details Carbon fiber made from acrylic fiber and process for production Carbon fiber made from acrylic fiber and process for production

1992-06-17

1994-09-20

Ryan, Patrick J.

Stock material or miscellaneous articles

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

Rod, strand, filament or fiber

428364, 428372, 428379, 428400, 4234472, 4234474, B32B 900, D02G 300

Patent

active

053488024

ABSTRACT:
Disclosed is a carbon fiber made from an acrylic fiber, the carbon crystal of which has a crystal size Lc of 15 to 65 .ANG. as determined by the wide angle X-ray diffractometry. This carbon fiber has regions with a lower crystallinity in the surface layer portion thereof than that of the central portion thereof, and the compressive strength .sigma..sub.cf (GPa) of the single filament thereof determined by the loop method satisfies formula (I):

REFERENCES:
patent: Re33537 (1991-02-01), Hiramatsu et al.
patent: 3925524 (1975-12-01), Kimmel et al.
patent: 4024227 (1977-05-01), Kishimoto et al.
patent: 4600572 (1986-07-01), Hiramatsu

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