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Process for the preparation of carbon fibers having structure reflected in cross sectional view thereof as random mosaic
Process for the preparation of carbon fibers having structure reflected in cross sectional view thereof as random mosaic
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机译:制备碳纤维的方法,该碳纤维的结构在横截面图中反映为无规镶嵌
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摘要
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° to 450° 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° 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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