| 摘要 |
PURPOSE:To obtain carbon yarn having high performance and a small amount of fluff, by arranging plural rollers in a flame-resistant treatment process, setting degrees of elongation and shrinkage between rollers at specific values determined by a specific method, subjecting acrylonitrile polymer yarn to flame-resistant treatment, followed by carbonizing it. CONSTITUTION:In subjecting acrylonitrile polymer yarn to flame-resistant treatment by drawing it in an oxidizing atmosphere at 200-400 deg.C by multiple stages, each ratio of elongation of multiple stages is set at the elongation and shrinkage point En+ or -3% range showing the inflection Pn determined from load and degree of elongation and shrinkage, preobtained from an experiment of a batch furnace on yarn, the yarn is subjected to flame-resistant treatment, and carbonized. A retention time of yarn between rollers is preferably 2-15min.
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