2.22 dtex聚苯硫醚短纤维纺丝工艺的探讨

采用含水率小于50μg/g的聚苯硫醚(PPS)切片熔融纺丝生产PPS短纤维,对纺丝工艺条件进行了探讨。结果表明:控制PPS切片干燥温度120～140℃,干燥时间8～10 h,纺丝温度330℃,环吹风温度23～26℃,环吹风速度1.3～1.6 m/s,拉伸槽温度90～100℃,紧张热定型温度150～180℃,单体抽吸速度0.4 s/min,总拉伸倍数3.4～4.4,纺丝过程平稳,生产2.22 dtex PPS短纤维断裂强度大于等于4.2 cN/dtex,断裂伸长率为34.2%。

Spinning process of 2.22 dtex polyphenylene sulfide staple fiber

Polyphenylene sulfide(PPS) staple fiber was prepared from PPS chip with moisture content less than 50 μg/g by melt spinning process.The spinning process conditions were discussed.The results showed that the 2.22 dtex PPS staple fiber can be steadily produced with the breaking strength not less than 4.2 cN/dtex and elongation at break of 34.2% under the conditions as followed: PPS chip drying temperature 120-140 ℃,drying time 8-10 h,spinning temperature 330 ℃,circular air blow temperature 23-26 ℃ and speed 1.3-1.6 m/s,drafting groove temperature 90-100 ℃,heat setting temperature under tension 150-180 ℃,monomer suction speed 0.4 s/min,total draw ratio 3.4-4.4.