涤纶POY上油不匀的原因分析及对策

采用特性黏数为0.645 dL/g的半消光PET熔体直接纺丝生产135 dtex/72 f涤纶POY,从工艺及设备等分析了涤纶POY上油不匀的原因,并提出了解决措施。结果表明:涤纶POY上油不匀的主要原因是油嘴丝路不正确、出油不连续及油剂性能差等;控制油剂系统调配槽、高位槽、现场槽的工艺温度分别为35,25,20℃,油剂泵转速大于8 r/min,油剂调配时间小于1 h,丝束与油嘴接触夹角为5°,可以有效避免涤纶POY上油不匀,纤维的条干不匀率可降低至1.25%。

Cause analysis and countermeasures to uneven oiling for PET POY

A semi-dull polyethylene terephthalate(PET) melt with the intrinsic viscosity of 0.645 dL/g was directly spun into 135 dtex/72 f PET POY.The causes of uneven oiling of PET POY were analyzed from the aspects of technological process and equipments.And the corresponding countermeasures were put forward.The results showed that the causes of uneven oiling unevenness of PET POY included incorrect yarn path on oil jet,uncontinuous oil flow and poor finish oil performance;and the oiling non-uniformity of PET POY can be efficiently depressed and the yarn irregularity can be decreased to 1.25% under the conditions as followed: 35 ℃,25 ℃ and 20 ℃ for the mixing tank,elevated tank and supply tank of oiling system,respectively,oil pump rotary speed above 8 r/min,oil proportioning time below 1 h,contact angle between yarn and oil jet of 5°.