细旦多孔POY内在质量造成DTY染色不匀问题的原因分析

摘要

First 75 D/144 F fine denier porous polyester POY was produced by the direct melt spinning process with blowback cooling device DIO ring and WINGS winding designed by BARMAG company and then drawn textured into DTY with FK6V-1000 machine. But the inherent quality of POY debase the quality of DTY such as dyeing problem. This paper discusses the effect of the polyester PET property index, melt temperature, Article POY dry, POY oil uniformity and the internal stress of POY on DTY dyeing. The result shows that the stable DEG content in melt, the nicer uniformity of flow melt spinning, lower oil rate and CV value can effectively reduce the im- perfect dyeing yarn and make DTY M rate above 98%.%在熔体直纺工艺路线上,利用巴马格公司设计的DIO组件、EVO环吹风冷却装置、WINGS卷绕头生产出75D/144 F细旦多孔涤纶POY,然后在FK6V-1000型加弹机上加工成DTY,做到了产能效益最大化,但是因POY内在质量对DTY的染色产生了影响,又制约了DTY质量的提升。重点讨论了聚酯PET物性指标控制、熔体温度控制、POY条干、POY含油均匀性和POY内应力对DTY染色的影响,实践表明：保持熔体中DEG含量稳定、改善熔体纺丝流动的均匀性、降低含油率和条干CV值、及时处理POY热拉伸应力的异常,最终能有效地降低DTY染色中条纹丝和深浅色的降等,使DTY的M率达到98%以上。