摘要
以四釜聚合装置生产的特性黏数(0.65±0.01)dL/g的聚对苯二甲酸乙二醇酯(PET)熔体为原料,通过在线添加特性黏数为(0.37±0.02)dL/g的黑色母粒,熔体直纺生产200 dtex/144 f黑色涤纶预取向丝(POY),对黑色母粒干燥及熔融工艺、纺丝和卷绕工艺进行了优化。结果表明:较佳工艺条件为黑色母粒干燥温度153~157℃、干燥时间12 h,注射螺杆挤压机螺杆各区温度采用一、二区温度较低,三、四、五区温度较高的分布方式,纺丝温度283℃,组件预热炉温度为305℃,环吹风温度20℃、相对湿度85%、压力28 Pa,选用劳舍尔油嘴、油架高度900 mm、纤维含油率(0.50±0.05)%,卷绕速度2700 m/min;在较佳工艺条件下生产200 dtex/144 f黑色涤纶POY,纺丝断头次数少,纤维断裂强度2.33 cN/dtex、断裂强度变异系数2.62%、断裂伸长率145.7%、断裂伸长率变异系数2.85%、条干不匀率0.88%,产品质量达到FZ/T 54063—2023《有色涤纶预取向丝》的优等品要求。
Polyethylene terephthalate(PET)melt with an intrinsic viscosity of(0.65±0.01)dL/g,prepared using a four-reactor polymerization unit,was employed as the raw material.By incorporating black masterbatch with an intrinsic viscosity of(0.37±0.02)dL/g online,200 dtex/144 f black polyester partially oriented yarn(POY)was produced via melt direct spinning.The drying and melting processes of the black masterbatch,as well as spinning and winding processes,were optimized.The results showed that the optimal process conditions were:black masterbatch drying temperature of 153-157℃for 12 h,with the screw zones of the injection extrusion machine controlled such that zones 1 and 2 were maintained at relatively lower temperatures,while zones 3,4,and 5 were set at higher temperatures,spinning temperature of 283℃,spin pack preheating furnace temperature of 305℃,annular quench air temperature 20℃,relative humidity 85%,pressure 28 Pa,Lureshel nozzles,oil rack height 900 mm,fiber oil content(0.50±0.05)%,winding speed 2700 m/min;under these conditions,the obtained 200 dtex/144 f black polyester POY exhibited low breakage frequency,breaking strength of 2.33 cN/dtex,coefficient of variation of breaking strength 2.62%,elongation at preak 145.7%,coefficient of variation of elongation at break 2.85%,and yarn unevenness of 0.88%;and the product quality met the premium grade requirements of FZ/T 54063—2023 Colored Polyester Partially Oriented Yarn.
作者
沈洁
王晓明
吴汉锋
蔡学飞
陆海梅
沈栋
SHEN Jie;WANG Xiaoming;WU Hanfeng;CAI Xuefei;LU Haimei;SHEN Dong(Tongkun Group Zhejiang Hengtong Chemical Fiber Co.,Ltd.,Tongxiang 314513)
出处
《合成纤维工业》
2025年第5期89-93,共5页
China Synthetic Fiber Industry
关键词
涤纶预取向丝
黑色母粒
熔体直纺
在线添加
生产工艺
polyester partially oriented yarn
black masterbatch
melt direct spinning
online addition
production process
