聚酯工艺指标对纺丝断头的影响及解决对策  

Influence of Polyester Process Index on Spinning Broken Ends and Its Countermeasures

作　　者：徐剑锋 虞珍瑜 XU Jian-feng;YU Zhen-yu(Zhejiang Hengtong Chemical Fiber Co.,Ltd.,Tongkun Group,Tongxiang 314500,Zhejiang,China)

机构地区：[1]桐昆集团浙江恒通化纤有限公司,浙江桐乡314500

出　　处：《合成纤维》2024年第5期38-40,44,共4页Synthetic Fiber in China

摘　　要：在中纺院年产30万t四釜聚酯装置上,研究第一酯化酸值、端羧基含量和特性黏度对纺丝断头的影响。研究数据表明:第一酯化酸值控制在58~60 mg/g、端羧基含量控制在37~40 mol/t、熔体特性黏度控制在0.622~0.630 dL/g时,纺丝断头次数为最少。同时,得出影响第一酯化酸值、端羧基含量和熔体特性黏度的因素为液位、回用乙二醇、反应温度、压力、搅拌速度、真空度以及添加的催化剂含量等,通过优化这些因素,使聚酯工艺指标最佳。The effects of the first esterification acid value,carboxyl end group content and intrinsic viscosity on spinning broken ends were studied in a 300000 t/a four-kettle polyester plant of China Textile Institute.Research data shows that the minimum number of spinning broken ends is obtained when the first esterification acid value is 58~60 mg/g,the carboxyl end group content is 37~40 mol/t and the inherent viscosity is 0.622~0.630 dL/g.Meanwhile,the factors affecting the first esterification acid value,the carboxyl end group content and inherent viscosity of the melt are liquid level,recycled ethylene glycol,reaction temperature,pressure,stirring speed,vacuum degree and the content of added catalyst,etc.By adjusting and optimizing these factors,the polyester process index is optimized.

关 键 词：聚酯 酸值 端羧基 特性黏度 纺丝断头 

分 类 号：TQ342.21[化学工程—化纤工业]