| 摘要 |
PURPOSE:To manufacture a pitch fiber suitable for the production of carbon fiber, in high spinnability, by spinning a pitch containing specific amounts of optically anisotropic domain and quinoline-insoluble component, keeping the viscosity within a specific range. CONSTITUTION:The objective pitch fiber can be manufactured by the melt-spinning of a pitch containing 80-100%, preferably 90-100% optically anisotropic domain and <=60wt%, preferably 5-50wt% quinoline-insoluble component, and having a softening point of preferably <=320 deg.C, under a viscosity of 300-1,500 poise, preferably 300-700 poise.
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