| 摘要 |
PURPOSE:To obtain a carbon fiber meltable uniformly at the spinning temperature and having excellent spinnability, etc., by extracting coal tar pitch with a solvent, hydrogenating and heat-treating the component isoluble in the solvent, spinning and infusibilizing the product, and carbonizing or graphitizing the obtained fiber. CONSTITUTION:Coal tar pitch is optionally heat-treated e.g. at 870-420 deg.C for 0.5-20hr, and is extracted with a solvent such as tolune for 8-12hr preferably under refluxing. The solvent-insoluble component is treated e.g. at 400-470 deg.C under a pressure between 5atm and the autogeneous pressure for 10-180min in the presence of a hydrogenation solvent (e.g. hydrogenated anthracene oil), and is heat-treated at 380-470 deg.C under normal pressure introducing nitrogen gas to the system to obtain a pitch having a quinoline-insoluble content of preferably <=20wt% and an anisotropy of >=90%. the pitch is subjectd to the spinning, the infusibilization, and the carbonization or graphitization to obtain the objective fiber.
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