| 摘要 |
PURPOSE:To obtain the subject carbon fiber having specific crystal structure, contact angle to ethylene glycol and elongation, giving an easily handleable yarn to enable easy weaving and knitting and suitable as a reinforcing fiber for a light-weight structural material for space industry by melt-spinning a carbonaceous pitch. CONSTITUTION:A carbonaceous pitch fiber produced by the melt-spinning of a carbonaceous pitch is infusibilized by heating in an oxygen-rich gas atmosphere and then carbonized by heating in an inert gas. As necessary, the produced fiber is further carbonized or graphitized with heat to obtain the objective carbon fiber having a crystal structure characterized by specific X-ray structure parameters comprising an orientation angle of 25-38 deg., a lamination thickness of 19-35Angstrom and a plane spacing of 3.45-3.50Angstrom and having an ethylene glycol contact angle of <=30 deg., an elongation of >=1.0% and preferably a tensile strength of >=150kg/mm<2>. |
