| 摘要 |
PURPOSE:To obtain the titled high-strength high elastic modulus fiber with hardly any napping, by doubling filaments prepared by spinning carbonaceous pitch, applying a heat-resistant oiling agent, infusibilizing the obtained fiber in an oxygen-enriched gas, then subjecting the infusibilized fiber to carbonization or graphitization treatment. CONSTITUTION:Carbonaceous pitch, such as coal tar pitch of naphtha cracked tar pitch, is melt spun to afford pitch filaments, which are then doubled so as to provide preferably 500-100,000 number of filaments. A straight based heat-resistant oiling agent, such as alkylphenylpolysiloxane, is subsequently applied thereto. The resultant fiber bundle in a linear form is passed through an enriched oxygen atmosphere in >=30%, preferably <=90% oxygen concentration, infusibilized at <=350 deg.C, preferably 300-330 deg.C temperature and then subjected to carbonization or graphitization treatment to provide the aimed fiber. |
