| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for continuously producing carbon fibers, capable of preventing the carbon fibers from wrapping around a roller or breaking and capable of continuously obtaining the carbon fibers little in fuzzes and excellent in handling in downstream processings in improved production efficiency by subjecting a precursor fiber bundle to a flame-resistant treatment, imparting water to the flame-resistant fiber bundle and subsequently carbonizing the treated fiber bundle. SOLUTION: This method for continuously producing carbon fibers comprises heating the precursor fiber bundle of polyacrylonitrile, etc., in an oxygen- containing atmosphere, such as air, heated at 200-300 deg.C, imparting water (preferably in an amount of 0.1-2.0 times the weight of the obtained flame-resistant fiber bundle) to the flame-resistant fiber bundle and subsequently carbonizing the fiber bundle into the carbon fibers. The density of the fibers is preferably controlled to >=500 filaments/mm, and a plurality of the precursor fiber bundles are preferably allowed to run side by side. |
