外环吹风直纺260dtex/288f涤纶POY生产工艺

Production process of 260 dtex/288 f directly-spun PET POY using external circular quench air method

采用特性黏数为0.645 dL/g的半消光聚对苯二甲酸乙二醇酯(PET)熔体直接纺丝,探讨了260 dt-ex/288 f涤纶预取向丝(POY)生产工艺。结果表明:选择外环吹风冷却系统,喷丝板孔径为0.15 mm,孔排列为圆形分布,熔体温度为273～274℃,双油嘴上油,油嘴高度为800 mm,缓冷区高度45 mm,环吹风筒长度16 cm,风压35 Pa,生产出的260 dtex/288 f涤纶POY,条干不匀率为0.96%,断裂伸长率为127%～130%,断裂伸长CV值为1.97%,质量满足后道加工要求。

The semi-dull polyethylene terephthalate （PET） melt with the intrinsic viscosity of 0.645 dL/g was directly spun into 260 dtex/288 f PET preoriented yam （POY）. The production process was discussed. The results showed that the 260 dtex/ 288 f PET POY satisfying the downstream processing requirements can be produced smoothly with the yarn irregularity of 0.96%, elongation at break 127% -130% , CVvalue of breaking elongation 1.97% by applying the external circular quench air system and a spinneret of 0.15 mm in the hole diameter with circular arrangement under the conditions as followed： melt temperature 273 - 274 ℃, double nipple oiling, nipple height 800 mm, slow-cooling height 45 mm, circular air duct length 16 em, air pressure 35 Pa.