Novel spinning method

Details Novel spinning method Novel spinning method

1988-10-17

1990-02-20

Stoll, Robert L.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

4234471, 4234472, 4234476, 246 292, 208 39, D01F 912

Patent

active

049024922

ABSTRACT:
In a process for the production of carbon fibers from high boiling bituminous substances in which a purified and polymerized concentrated carbon fiber precursor is spun into fibers which are oxidized and then carbonized and optionally graphitized, the improvement comprising adding to the carbon fiber precursor just before spinning 2 to 10% by weight of a solvent in which the precursor is insoluble or only slightly soluble under normal conditions and mixing the resulting mixture under hypercritical conditions for the solvent for at least 10 minutes without gas or solid inclusions formed in the fiber and neoformatgion of solids is prevented.

REFERENCES:
patent: 3035308 (1962-05-01), Ragoss et al.
patent: 3784679 (1974-01-01), Chiche
patent: 3919387 (1975-11-01), Singer
patent: 4146576 (1979-03-01), Wyss
patent: 4470960 (1984-09-01), Uemura et al.
patent: 4596652 (1986-06-01), Shibatoni et al.
patent: 4631181 (1986-12-01), Matsumoto et al.
patent: 4705618 (1987-11-01), Tsuchitani et al.

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