Process for producing carbon fibers having high strand strength
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United States of America Patent
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Sep 20, 1994
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app pub date -
Nov 21, 1991
filing date -
Nov 21, 1990
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Abstract
A process for producing carbon fibers having high strand strength, which comprises subjecting pitch fibers obtained by melt-spinning pitch, followed by gathering, to infusible treatment to obtain infusible fibers, followed by carbonization treatment, and if necessary, graphitization treatment, to obtain carbon fibers, wherein the infusible fibers or the carbon fibers are heat-treated in an atmosphere containing steam or carbon dioxide at a temperature of from 500.degree. to 1,800.degree. C.
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