| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an acrylonitrile precursor fiber bundle which has appropriate surface denseness suitable for formation of carbon fiber having higher mechanical characteristics and its production method.SOLUTION: A method of producing an acrylonitrile precursor fiber bundle for carbon fiber includes obtaining a fiber bundle spun under a specified drawing condition through a step of causing the fiber bundle to shrink or stretch 0.95-1.3 times in a water bath at 40°C or higher under a specified coagulation condition in spinning by dry-wet spinning, and applying an oil agent containing a silicone compound to the fiber bundle to a specified coating amount of the silicone compound.</p> |
