| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing a carbon fiber bundle which can be more easily stretch-broken than a conventional carbon fiber bundle and can reduce the production cost of a short carbon fiber bundle. <P>SOLUTION: The method for producing a carbon fiber bundle includes: a flameproofing step of flameproofing a polyacrylonitrile-based precursor fiber bundle to obtain a flameproofed fiber bundle; a pre-carbonizing step of pre-carbonizing the flameproofed fiber bundle to obtain a pre-carbonized fiber bundle; and a carbonizing step of carbonizing the pre-carbonized fiber bundle to obtain a carbonized fiber bundle. In the method, a decomposition promoting substance is applied to the flameproofed fiber bundle at regular intervals in a longitudinal direction of the flameproofed fiber bundle after the flameproofing step before the pre-carbonizing step. <P>COPYRIGHT: (C)2012,JPO&INPIT |
