化学降解废旧聚酯生产有色涤纶短纤维工艺探讨  

Production process of colored polyester staple fiber through chemical degradation of polyester waste

作　　者：崔晓雪[1] 魏文静[1] 张立东[1] 范琳[1] Cui Xiaoxue;Wei Wenjing;Zhang Lidong;Fang Lin(Tianjin Bohai Vocational Technology College, Tianjin 30040)

机构地区：[1]天津渤海职业技术学院,天津300402

出　　处：《合成纤维工业》2018年第2期71-73,共3页China Synthetic Fiber Industry

基　　金：2017年天津渤化集团技术创新项目(55)

摘　　要：采用特种降解剂和乙二醇对废旧聚酯薄膜和瓶片进行化学降解,经再聚合及熔体直接纺丝生产有色涤纶短纤维,探讨了化学降解工艺条件以及再生聚酯及纤维产品质量。结果表明:添加一定量的特种降解剂和极少量的乙二醇,降解温度280℃,反应压力10 MPa,反应时间1.5 min,废旧聚酯即可完全降解;经过再聚合得到的再生聚酯特性黏数达0.64 dL/g,色相好;再经熔体直接纺丝,并且在线添加色母粒与再聚合后的熔体混合,可纺性好,生产的1.56 dtex×38 mm有色涤纶短纤维与常规涤纶短纤维质量接近,断裂强度达5.5 cN/dtex,卷曲度9.0%,干热收缩率35.52%。Polyester film and bottle waste was chemically degraded in the presence of a special degradation agent and ethylene glycol and was produced into colored polyester staple fiber after re-polymerization and direct melt spinning process. The effect of chemical degradation conditions on the quality of regenerated polyester and fiber was discussed. The results showed that the polyester waste could be completely degraded within 1.5 min when a specific amount of the special degradation agent and trace ethylene glycol was added at the degradation temperature of 280℃ and reaction pressure of 10 MPa; the obtained regenerated polyester had the intrinsic viscosity of 0.64 dL/g and fairly good hue after re-polymerization ; the re-polymerized polyester melt exhibited fairly good spinnability while added with color masterbatch on line during direct melt spinning process; and the obtained colored polyester staple fiber of 1.56 dtex × 38 mm possessed the quality equal to the traditional polyester staple fiber and exhibited the breaking strength of 5.5 cN/dtex, crimp degree of 9.0% and dry hot shrinkage of 35.52%.

关 键 词：废旧聚酯 化学降解 再生聚酯 涤纶短纤维 有色纤维 

分 类 号：TQ342.21[化学工程—化纤工业]