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通过120 mm大板径喷丝板生产368 dtex/576 f多孔细旦涤纶预取向丝(POY),研究了纺丝工艺条件对POY生产稳定性及物性指标的影响。结果表明:熔体输送温度为280℃,纺丝温度为286℃,纺丝组件初始压力为18.2 MPa,环吹风压为50 Pa,双油嘴上油,集束位置750 mm,纺丝速度为2 650 m/min时,可制得生产稳定和性能优良的多孔细旦POY,产品的断裂强度CV值为2.56%,断裂伸长率为122.3%,断裂伸长率CV值为2.58%,条干不匀率为0.78%。
The production of 368 dtex / 576 f porous fine polyester pre-oriented filaments (POY) by a 120 mm large diameter spinneret was investigated. The effects of spinning conditions on the stability and physical properties of POY were investigated. The results show that the melt transfer temperature is 280 ℃, the spinning temperature is 286 ℃, the initial pressure of the spinning unit is 18.2 MPa, the ring blowing pressure is 50 Pa, the double nozzle is oiled, the cluster position is 750 mm and the spinning speed is 2 650 m / min, it can produce porous fine denier POY with stable performance and excellent properties. The product has a breaking strength CV value of 2.56%, an elongation at break of 122.3% and an elongation at break value of CV of 2.58% The uniformity is 0.78%.