低沸水收缩率涤纶DTY网络丝的制备与工艺探讨

Discussions on Preparation and Process of Polyester DTY Interlaced Yarn with Low Boiling Water Shrinkage

文章以涤纶POY纤维为原料,通过测定DTY网络丝的取向度和结晶度,判断取向度和结晶度对涤纶DTY网络丝沸水收缩率的影响,主要改变加弹工艺中牵伸比、热箱温度H1/H2和网络气压的参数,以制得低沸水收缩率的DTY网络丝。实验证明:涤纶DTY网络丝的沸水收缩率,随牵伸比的增大而升高,随热箱温度H1/H2的提高而减小,随网络气压的增大而升高,影响程度:热箱温度H1/H2>网络气压>牵伸比。结合公司原料特性进行分析,得出制备低沸水收缩率涤纶DTY网络丝的最佳工艺为:牵伸比DR为1.65、热箱温度H1/H2为210/170℃、网络气压为210kPa,此时涤纶DTY网络丝的沸水收缩率为3.0%。

This paper mainly changes parameters of draw ratio,heater temperature H1/H2 and network pressure in texturing process so as to prepare DTY interlaced yarn with a low boiling water shrinkage with polyester POY fiber as the raw material by measuring the degree of orientation and degree of crystallinity of DTY interlaced yarn and judging the influence of boiling water shrinkage of polyester DTY interlaced yarn.The experiment proves that the boiling water shrinkage of polyester DTY interlaced yarn increases with the increase of draw ratio,decreases with the increase of heater temperature H1/H2 and increases with the increase of network pressure;in terms of the degree of influence,heater temperature H1/H2network pressuredraw ratio.According to the analysis on characteristics of the raw material,it is obtained that the optimal process of polyester DTY interlaced yarn with low boiling water shrinkage is：draw ration DR 1.65,heater temperature H1/H2 210/170℃and network pressure 210 kPa.At this time,the boiling water shrinkage of polyester DTY interlaced yarn is 3.0%.