| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing carbon fiber of high quality from acrylic fiber tow by pulling up the tow vertically from a tow containing can in no occurrence of bending, folding, twisting and uneven thickness of the tow without causing filament breakage and fluffing . SOLUTION: An acrylic fiber tow 3 contained in a tow container 1 under traversing is pulled up vertically and calcined to produce carbon fiber. In this case, the tow is pulled up vertically so that the traverse width X and the tow-vertically pulling up height Y may satisfy: 2X≤Y≤10X, where X is the traverse width and Y is the pulling-up height, and the pulled-up tow is brought into contact with the tow trimming guide to perform the tow trimming. At this time, a higher tension is applied to the tow, either the tension of 0.8 fold self-weight or that calculated by the following equation: f≥4.5×10-4×F [where f is a tension of the self-weight + the tension (g) to be added on the right overhead of the container and F is whole fineness in denier]. COPYRIGHT: (C)2004,JPO&NCIPI
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