1.67dtex有光正三角形涤纶短纤维纺丝工艺探讨

采用特性黏数为0.677 dL/g的有光聚酯切片熔融纺丝生产正三角形涤纶短纤维,探讨了切片干燥、纺丝成形、拉伸、热定型等对生产及纤维性能的影响。结果表明:控制聚酯切片含水率小于28μg/g,纺丝温度282～286℃,纺丝速度930～950 m/min,拉伸温度60～70℃,总拉伸倍数3.50～3.65,生产稳定,得到的1.67 dtex有光正三角形涤纶短纤维截面清晰,异形度为55.1%,断裂强度为5.09 cN/dtex,断裂伸长率为28.5%,180℃干热收缩率为8.4%。

Spinning process of 1.67 dtex bright regular triangle polyester staple fiber

A regular triangle polyester staple fiber was produced from bright polyester chip with the intrinsic viscosity of 0.677 dL/g via melt spinning process.The effects of chip drying,spin formation,drawing and heat setting processes on the production and properties of the fiber were discussed.The results showed that 1.67 dtex bright regular triangle polyester staple fiber can be steadily produced with clear cross section,degree of profile 55.1%,breaking strength 5.09 cN/dtex,elongation at break 28.5% and dry hot shrinkage 8.4% at 180 ℃ when the process conditions were as followed: moisture content of polyester chip less than 28 μg/g,spinning temperature 282-286 ℃,spinning speed 930-950 m/min,drawing temperature 60-70 ℃,total draw ratio 3.50-3.65.