纺丝工艺对聚酯全拉伸丝性能的影响

Effect of spinning conditions on properties of polyester FDY

通过不同的纺丝工艺制备了线密度为40和84 dtex的聚酯全拉伸丝(FDY),研究了加捻、加热温度、纺丝速度及牵伸比等对FDY性能的影响,并研究了纤维的拉伸性能。结果表明:提高纺丝速度对丝的伸长率、CV值、U值和收缩率有显著影响,但对丝的强度没有显著影响。除了在纺丝过程中需要更高的纺丝速度和中度拉伸外,生产FDY的过程与生产预取向丝(POY)的相似。拉伸后产生的取向和结晶使丝性能稳定。连续聚合直接纺丝制得长丝,长丝的关键参数,如强度、伸长率、Uster系数和沸水收缩率,都受到密切监控和控制,并随后经加捻或上浆工序加工。

In this study,40 and 84 dtex polyester filament yarns were prepared with varying spinning conditions and a process was investigated and the effect of different spinning processing parameters including twist,heater temperature,winding speed,the draw ratio of fully drawn yarns was studied. Finally,the tensile properties of the yarns were analyzed. The results show that the increasing winding speed process had a significant effect on the elongation CV%,U%,and shrinkage of the yarns,but tenacity had no significant impact on yarn properties. Fully drawn yarn( FDY) was produced by a process similar to POY( partially oriented yarn) manufacturing,except that the yarn is produced at higher spinning speeds coupled with intermediate drawing integrated in the process itself. This allows stabilization through orientation and crystallization.Yarns are produced by a continuous polymerization process. All critical yarn properties such as tenacity,elongation,Uster variation and boiling water shrinkage are closely monitored and controlled. Controlled interlace enables the yarns to be twisted or sized in subsequent operations.