Small diameter pitch-based carbon fiber bundle and production me

Details Small diameter pitch-based carbon fiber bundle and production me Small diameter pitch-based carbon fiber bundle and production me

1993-09-07

1995-06-20

Langel, Wayne

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

4234476, D01F 9145

Patent

active

054259312

ABSTRACT:
A bundle of pitch-based carbon fibers which is composed of 1000 to 100,000 continuous fiber filaments having an average diameter of 4 to 8 .mu.m, a filament tensile strength of at least 3.0 GPa, and a modulus of at least 600 GPa, and also a method for producing a fine diameter pitch-based carbon fiber wherein use is made of a spinning nozzle with a single nozzle plate which has at least 1000 capillary holes, has the capillaries arranged concentrically and circularly in 3 to 20 rows, has the capillaries positioned to be divided into at least two blocks, has a columnar projection protruding at least 20 mm from the surface of the nozzle plate at the center of the nozzle plate, and has capillaries of a diameter of 50 to 110 .mu.m.

REFERENCES:
patent: 4670202 (1987-06-01), Uenoyama et al.
patent: 4816195 (1989-03-01), Hettinger et al.
patent: 4895212 (1990-01-01), Komine et al.
patent: 5004511 (1991-04-01), Tamura et al.
patent: 5283113 (1994-02-01), Nishimura et al.

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