| 摘要 |
PURPOSE:Polyethylene oxide or methyl-eterified cellulose of a specific molecular weight is applied to bundles of acrylonitrile fibers in the form of an aqueous solution, then the bundles are dried and heat treated to produce the titled fiber of high quality and high performance without reduction in strength and surface damage. CONSTITUTION:When bundles of fibers to be treated are fed into a carbonization or graphitization furnace and subjected to continuous heat treatments to produce acrylonitrile carbon fiber or graphite fiber, the fiber bundles are previously treated with an aqueous solution of polyehtylene oxide of more than 100,000, preferably 100,000-1,100,000mol.wt., methyl-, ethyl- or hydroxyethyl-etherified cellulose and/or polyvinyl methyl ether so that the pick up becomes 0.01- 0.5wt% based on the resultant preoxidized fiber bundles or 0.1-5wt% based on the resultant carbon fiber bundles. Then, the bundles are dried at a temperature lower than 250 deg.C and heat treated to give the objective fiber. |
