高异形度三叶涤纶POY长丝生产工艺研究

Study on the production technology of trilobal polyester POY products with high profile degree

采用熔体直纺工艺路线,通过对组件初始压力、喷丝孔长径比、熔体输送工艺、纺丝冷却条件等工艺条件的探索,成功开发出了270 dtex/144 f高异形度三叶涤纶POY产品。试验表明：生产270 dtex/144 f高异形度三叶涤纶POY时,控制组件初始压力15～19 MPa、喷丝孔长径比5∶1、熔体输送温度279～282℃、纺丝温度288～292℃、无风区50 mm、集束点900～1 050 mm的工艺条件,纺丝满卷率在90%以上,纤维的异形度可达到90%以上。

Using melt direct spinning process route, the process conditions such as the spin pack initial pressure, spinneret hole L/D ratio, the melt conveying process, spinning cooling conditions, and so on were studied. The 270 dtex/144 f high profile degree of trilobal polyester POY products were successfully developed . The results showed that when producing of 270 dtex/144 f high profile degree of trilobal polyester POY products, the control spin pack initial pressure ：15 - 19 MPa,the spinneret hole L/D ratio ：5：1 ,the melt conveying temperature ：279 ~ 282 ℃, the spinning temperature ：288 ~ 292 ℃, the calm area： 50 mm, the collection position ：900 - 1 050 mm, the spinning full package rate over 90%, the fiber profile degree can reach above 90%.