Process for the preparation of carbon fibers having structure re

Details Process for the preparation of carbon fibers having structure re Process for the preparation of carbon fibers having structure re

1984-04-18

1988-05-24

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Filaments

264 8, 264 83, 2642111, 26421117, 264555, 4234471, 425 8, D01D 518, D01F 914

Patent

active

047464704

ABSTRACT:
A process for preparing carbon fibers wherein carbon fibers are prepared from the mesophase-pitch containing not more than 80% by weight of a quinoline-insoluble component and showing, under a polarization microscope, more than 70% of optically anisotropic region, comprising the steps of subjecting a mesophase-pitch showing a viscosity of 10 to 100 poise at a temperature of spinning of 330.degree. to 450.degree. C., to rotating-centrifugal-spinning in a rotating-centrifugal spinning machine with a peripheral velocity of rotating nozzle thereof of 300 to 1000 m/min and exposing the thus spun fibers of the mesophase pitch to a flow of a gas spouting into a spinning direction at a temperature of 280.degree. to 400.degree. C. and at a linear velocity of 50 to 200 m/sec, thereby preparing carbon fibers showing a random-mosaic structural pattern in cross section thereof perpendicular to fiber axis.

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