Method for producing graphite fiber
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United States of America Patent
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Dec 1, 1992
Issued Date -
N/A
app pub date -
Oct 22, 1990
filing date -
Mar 27, 1985
priority date (Note) -
Expired
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Abstract
A method for producing graphite fiber comprising graphitizing carbon fiber having a strength of 500 kgf/mm.sup.2 or more and a modulus of elasticity of from 27,000 to 33,000 kgf/mm.sup.2, and having at least on the surface of the fibers, from 0.2 to 2% by weight of an epoxy resin as a sizing agent, from 0.005 to 0.10% by weight of silicon and 0.005 to 0.02% by weight of phosphorus based on the weight of carbon fiber having said epoxy resin, silicon and phosphorus.
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