并列复合纤维热收缩差异的形成与控制  

Formation and control of differential thermal shrinkage of side-by-side bicomponent fibers

作　　者：周静宜[1] 张大省[1] 王春梅[1] 李进[1] 

机构地区：[1]北京服装学院,北京100029

出　　处：《合成纤维工业》2015年第1期7-10,共4页China Synthetic Fiber Industry

基　　金：北京市属高等学校创新团队建设与教师职业发展计划项目(RCQJ02140201)

摘　　要：选用高收缩聚对苯二甲酸乙二醇酯-1(HSPET-1)与聚对苯二甲酸丙二醇酯(PTT)、高收缩聚对苯二甲酸乙二醇酯-2(HSPET-2)与共聚醚酯(COPEET)作原料,经过纺丝、拉伸及热定型工艺分别制备了HSPET-1/PTT和HSPET-2/COPEET并列复合纤维,探讨了双组分并列复合纤维热收缩率差异的形成与控制。结果表明:双组分适宜的玻璃化转变温度和冷结晶温度是制定并列复合纤维加工工艺条件的基础;拉伸-定型工艺是决定并列复合纤维双组分取向和结晶结构差异的重要手段;HSPET-1/PTT复合纤维的熔融热焓为65.06 J/g,与HSPET-1和PTT单组分纤维的熔融热焓的加权平均值接近;双组分收缩率的差异是并列复合纤维受热过程中形成三维立体卷曲结构的推动力,这种热性能的差异决定着并列复合纤维的卷曲弹性;随着热定型温度升高,纤维的断裂强度和断裂伸长率增大,卷曲弹性率提高。High-shrinkage polyethylene terephthalate-1 （ HSPET-1 ） and polytrimethylene terephthalate（PTT） or high-shrinkage polyethylene terephthalate-2 （HSPET-2） and copolyether ester （COPEET） were used as raw material to manufacture HSPET-1/ PTT and HSPET-2/COPEET side-by-side bieomponent fibers by spinning, drawing and heat setting processes. The formation and control of differential thermal shrinkage of the side-by-side bicomponent fibers were discussed. The results showed that the suitable glass transition temperature and the cold crystallization point of the two components were crucial to the determination of process conditions for side-by-side bieomponent fibers; the drawing and heat setting processes decided the orientation degree and crystalline structure differential of the two components; the melt enthalpy of HSPET-1/PTTbicomponent fibers was 65.06 J/g, approaching the melt enthalpy weighted mean of HSPET-1 and PTT fibers; the differential thermal shrinkage of PTT and HSPET led to the formation of tri-dimentional crimp structure of side-by-side bicomponent fibers during the heating process and decided the crimp elasticity of side-by-side bicomponent fibers ; and the breaking strength, elongation at break and crimp elasticity of the fibers were increased as the heat setting temperature was elevated.

关 键 词：聚对苯二甲酸乙二醇酯 聚对苯二甲酸丙二醇酯 共聚醚酯 复合纤维 结构 热收缩 弹性 

分 类 号：TQ342.94[化学工程—化纤工业]