Carbon fiber production

Details Carbon fiber production Carbon fiber production

1975-03-12

1977-04-26

Woo, Jay H.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

264 292, C01B 3107

Patent

active

040201457

ABSTRACT:
An improved process is provided for producing a pyrolyzed carbonaceous filamentary material. The process utilizes a novel precursor of relatively high carbon content comprising a homogeneous blend of polystyrene and a substantial proportion of inexpensive pitch. Following melt spinning the resulting filamentary material is hot drawn, thermally stabilized, and carbonized. The thermal stabilization step of the process comprises the sulfonation of the previously hot drawn filamentary material. The thermally stabilized filamentary material optionally may be carbonized and graphitized. Processing difficulties commonly associated with a pitch precursor are effectively overcome.

REFERENCES:
patent: 3639140 (1972-02-01), Miyamichi
patent: 3723609 (1973-03-01), Mansmann et al.
patent: 3784679 (1974-01-01), Chiche
patent: 3852428 (1974-12-01), Powell et al.
patent: 3928544 (1975-12-01), Yokota et al.

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