| 摘要 |
PROBLEM TO BE SOLVED: To provide a para-wholly aromatic copolyamide fiber bundle which exhibits small fluctuation in fiber bundle fineness in the fiber axis direction as well as small unevenness of fineness among singles.SOLUTION: The para-wholly aromatic copolyamide fiber bundle is produced to satisfy a specific relation between the most frequent pressure fluctuation cycle (Hz) in feeding a spinning solution (polymer dope) into a spinning pack with a spinneret attached and the final winding speed (m/min) of the fiber bundle. |
