The anti - ultraviolet PET set yarn produced on high speed spinning line by master batch injection has the features ofevenness and stabilization in quality and remarkable functionality.
用母粒注入法在高速纺生产线上开发试制的防紫外线涤纶低弹丝，具有纤维质量均匀稳定、功能性显著的特点。
2
The enhancing of semi-finished goods evenness and fiber straightness has significant effect to improve yarn quality.
提高半制品条干均匀度和纤维伸直度，对改善成纱质量效果显著。
3
The paper fist deduced the mathmatic formula of irregularity relationship between ply yarn and single yarn, then analysed the evennessof single yarn effected on the property of ply yarn.