Process for producing carbon fibers

Details Process for producing carbon fibers Process for producing carbon fibers

1975-01-31

1976-11-23

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

264DIG19, 4234471, C01B 3107

Patent

active

039937194

ABSTRACT:
Improved carbon fibers (including graphite fibers) are produced by drying acrylic fibers in a water-swollen state spun from an inorganic solvent solution of an acrylonitrile homopolymer or copolymer containing at least 85 mol % acrylonitrile and having an orientation degree of at least 50% and a water content of 5 to 150%. The drying step is carried out at a temperature below 70.degree. C to reduce the water content in said fibers to below 4%. The dried fibers are then heated to form the improved carbon fibers.

REFERENCES:
patent: 3180913 (1965-04-01), Veitch et al.
patent: 3330898 (1967-07-01), Harley et al.
patent: 3701820 (1972-10-01), Kuratani et al.
patent: 3784666 (1974-01-01), Sekiguchi et al.
patent: 3841079 (1974-10-01), Ram et al.
Kirk-Othmer's Encyclo. of Chem. Tech. p. 317, 1963.

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