LMTPEE/PET偏心复合纤维的制备及其性能  

Preparation of LMTPEE/PET composite fibers with an eccentric sheath-core and their properties

作　　者：肖雪 何肖 邢喜全 张梦茹 王秀华[1] XIAO Xue;HE Xiao;XING Xiquan;ZHANG Mengru;WANG Xiuhua(National Engineering Lab for Textile Fiber Materials and Processing Technology,Zhejiang Sci-Tech University,Hangzhou 310018,China;Yuyao Dafa Chemical Fiber Co.,Ltd.,Ningbo 315400,China;Ningbo Dafa Chemical Fiber Co.,Ltd.,Ningbo 315336,China)

机构地区：[1]浙江理工大学纺织纤维材料与加工技术国家地方联合工程实验室,杭州310018 [2]余姚大发化纤有限公司,浙江宁波315400 [3]宁波大发化纤有限公司,浙江宁波315336

出　　处：《浙江理工大学学报（自然科学版）》2023年第6期701-708,共8页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：宁波“科技创新2025”重大专项(宁波市重大科技任务攻关项目)(2022Z156)。

摘　　要：为了制备柔韧性好、弹性优良的低熔点复合纤维,以低熔点热塑性聚醚酯弹性体(LMTPEE)为皮层、聚对苯二甲酸乙二醇酯(PET)为芯层通过熔融纺丝法制备了偏心复合纤维。探讨了复合比对LMTPEE/PET偏心复合纤维横截面、结晶性能、取向性能、拉伸性能、热收缩性能、卷曲性能等的影响,以及热处理温度对复合纤维的卷曲形貌和黏结性能的影响。结果表明:不同复合比的复合纤维横截面均有稳定的偏心结构;随着复合比(皮与芯的体积比)从40∶60改变到50∶50、60∶40,复合纤维的断裂伸长率和干热收缩率呈现增大的趋势,断裂强度、声速值、熔融焓和结晶度均逐渐减小。复合比为60∶40的LMTPEE/PET偏心复合纤维在热处理温度140℃、热处理时间10 min时,具有较好的卷曲性能;热处理温度高于170℃、热处理时间10 min时,纤维间发生黏结。该结果可为低熔点自卷曲纤维的制备和应用提供参考。To prepare low melting point composite fibers with superior flexibility and elasticity,eccentric composite fibers were prepared by melt spinning with low melting point thermoplastic polyether ester elastomer(LMTPEE)as the skin component and polyethylene terephthalate(PET)as the core component.The effects of the composite ratio on the cross section,crystallinity,orientation,drawability,thermal shrinkage and crimp properties of the LMTPEE/PET fibers and the effects of heat treatment temperature on the crimp morphology and adhesion properties of the composite fibers were discussed.The results show that the cross sections of the composite fibers with various composite ratios have stable eccentric morphology.With the composite ratio(the ratio of LMTPEE to PET)changing from 40∶60 to 50∶50 and 60:40,the breaking elongation and dry heat shrinkage of the composite fibers increase,while the tensile strength,sonic velocity,melting enthalpy and crystallinity decrease gradually.The LMTPEE/PET fibers with a composite ratio of 60∶40 show a superior crimping performance after being treated at 140℃for 10 min,while they could adhere with each other at a heat treatment temperature higher than 170°C for 10 min.The results can provide reference for the preparation and application of low melting point self-crimping fibers.

关 键 词：低熔点TPEE 偏心皮芯复合纤维 热收缩性能 三维卷曲 黏结性能 

分 类 号：TQ342.25[化学工程—化纤工业]