Preoxidized fiber and process for producing the same
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United States of America Patent
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Aug 20, 1985
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N/A
app pub date -
Sep 8, 1983
filing date -
Dec 27, 1980
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Abstract
A preoxidized fiber suitable for producing carbon fiber, comprising preoxidizing an acrylic fiber having thereon an ammonium salt of a fatty ester represented by formula [A] and [B] ##STR1## wherein R.sub.1 is an aliphatic hydrocarbon group having from 11 to 17 carbon atoms; R.sub.2 and R.sub.3 can each be hydrogen, a lower alkyl group, a hydroxyethyl group, or an hydroxyisopropyl group; and X.crclbar. is an anion. The preoxidized fiber produced from the acrylic fiber has very little coalescence, and therefore high-strength carbon fiber can be obtained from this preoxidized fiber.
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