| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing acrylic carbon fiber precursor fiber bundle, capable of suppressing the production of fluffs and separation defects even on separating yarns spun from a nozzle on spinning by using a wet spinning method. SOLUTION: This method for producing acrylic carbon fiber precursor fiber bundle by the wet spinning comprises (A) a process of spinning stock solution for spinning from 2 nozzles immersed in a coagulation liquid in a coagulation vessel and separating each of the obtained yarns from the 2 nozzles, (B) a process of arranging each of the yarns obtained from the 2 nozzles and separated alternately on a direction-changing roll installed in an upper direction of the coagulation vessel and progressing in a same direction, (C) a process of drying and densifying the yarns progressing in the same direction and (D) a process of combining adjacent 2 yarns among the dried and densified yarns and winding without doubling on a single bobbin. COPYRIGHT: (C)2006,JPO&NCIPI
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