粗旦五叶形有光PA6 FDY的生产工艺探讨

Discussion of coarse pentalobal bright PA6 FDY production process

采用相对粘度2．85±0．03的国产高速纺有光PA6切片为原料,在普通PA6纤维生产设备基础上,改油嘴上油为双油轮上油,喷丝板直径由80 mm改为100 mm,喷丝孔为五叶形,纺丝组件压力大于等于15 MPa;纺丝温度(275±1)℃,侧吹风速度0．68 m／s,热定型温度(170±1)℃,网络空气压力(0．35±0．01) MPa。生产的233 dtex／18 f粗旦五叶形有光PA6 FDY质量优良,其断裂强度4．0 cN／dtex,断裂伸长率43.5％,条干不匀率2．13％,染色均匀度大于等于4.0级。

The high-quality 233 dtex/18 f coarse pentalobal bright PA6 FDY with breaking strength 4.0 cN/dtex, elongation at break 43.5% , yarn irregularity 2.13% and dyeing evenness not less than 4.0 grade can be produced from home-made high - speed spun bright PA6 chip with relative viscosity 2.85 ± 0.03 on a conventional PA6 fiber plant by adopting double oil roller instead of oil nozzle, increasing the spinneret diameter to 100 mm from 80 mm and using pentalobal spinneret hole under the conditions of spin pack pressure not less than 15 MPa, spinning temperature （275± 1 ） ℃ , cross air blow speed 0.68 m/s, heat setting temperature （ 170 ± 1 ） ℃ and network air pressure （0.35 ±0.01 ） MPa.