The present invention provides a method for producing a polyacetal fiber that presents an improved whiteness unevenness. According to one embodiment, there is provided a polyacetal fiber production method that yields a polyacetal fiber using an oxymethylene copolymer having a melt index, at 190°C under a load of 2.16 kg, of 5-60 g/10 min, wherein the production method includes a take-off step for taking off the polyacetal fiber from the discharge nozzle of a spinning apparatus, and a drawing step for drawing the taken-off polyacetal fiber. The tensile elongation E1 of the polyacetal fiber after the take-off step is 20%-500%; the tensile elongation E2 of the polyacetal fiber after the drawing step is 10%-100%; E1≥E2; and the single fiber thickness of the polyacetal fiber after the drawing step is 0.7-5.0 denier.
本发明提供了一种生产聚
缩醛纤维的方法,该纤维的白度不均匀度有所改善。根据其中一个实施方案,本发明提供了一种聚
缩醛纤维的生产方法,该方法使用氧亚甲基共聚物生产聚
缩醛纤维,该共聚物在 190℃、2.16 千克载荷下的熔融指数为 5-60 克/10 分钟,其中该生产方法包括从纺丝设备的出料喷嘴上取下聚
缩醛纤维的取下步骤,以及对取下的聚
缩醛纤维进行牵伸的牵伸步骤。脱模步骤后聚
缩醛纤维的拉伸伸长率 E1 为 20%-500%;牵伸步骤后聚
缩醛纤维的拉伸伸长率 E2 为 10%-100%;E1≥E2;牵伸步骤后聚
缩醛纤维的单纤维厚度为 0.7-5.0 旦。