Process for producing carbon fibers of high tenacity and modulus

Details Process for producing carbon fibers of high tenacity and modulus Process for producing carbon fibers of high tenacity and modulus

1989-09-01

1991-09-24

Lorin, Hubert C.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Filaments

264 297, 264 83, 2642907, 4234478, D01F 922

Patent

active

050512161

ABSTRACT:
Acrylonitrile precursor fibers are subjected to a flame-resisting treatment, in an oxidizing atmosphere, while being elongated at least 3%, until a density of 1.22 g/cm.sup.3 is reached. The fibers are further treated to increase density up to 1.40 g/cm.sup.3, and then heat treated while undergoing further elongation, followed by higher temperature heat treatment while under tension. The resulting fibers have excellent properties, including high strand tenacity, high strand modulus, and high density.

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patent: 4695415 (1987-09-01), Setsuie et al.
Chemical Abstracts, vol. 82, No. 1975, p. 50, Abstract #5290x, Columbus, Ohio U.S.; & JPA 74 57118 (Mitsubishi Rayon Co, Ltd.) 03-06-74.
European Search Report on JP 84 90 3763 dated 26-10-1988.
"Product Data", by Hercules Inc. #862.

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