多级拉伸与热定型对聚乙烯/聚丙烯双组分纤维结构和性能的影响  

Influence of multistage drawing and heat setting on structure and properties of polyethylene/polypropylene bicomponent fibers

作　　者：刘金鑫 张海峰 张星 黄晨[1] 郑晓冰 靳向煜[1] LIU Jinxin;ZHANG Haifeng;ZHANG Xing;HUANG Chen;ZHENG Xiaobing;JIN Xiangyu(Engineering Research Center of Technical Textiles,Ministry of Education,Donghua University,Shanghai 201620,China;Zhejiang Sunwish Chemical Fiber Co.,Ltd.,Jiaxing,Zhejiang 314005,China)

机构地区：[1]东华大学产业用纺织品教育部工程研究中心,上海201620 [2]浙江新维狮合纤股份有限公司,浙江嘉兴314005

出　　处：《纺织学报》2019年第5期24-29,共6页Journal of Textile Research

基　　金：国家科技支撑计划(2015BAE01B01);中国纺织工业联合会应用基础研究项目(J201703)

摘　　要：为研究聚乙烯/聚丙烯(PE/PP)双组分纤维在非织造熔融纺丝成网工艺中的尺寸及力学稳定性,在双组分纤维制备过程中关键工艺位置进行取样,借助X射线多晶衍射仪、电子单纤维强力仪、扫描电子显微镜、BEION纤维细度测试系统等对纤维的结构和性能进行测试与表征。结果表明:多级拉伸过程中纤维的取向度和结晶度逐渐增加,其中二级拉伸对纤维体系的取向结晶起主要作用;纤维未经热定型时尺寸稳定性差,干热收缩率高;经多级拉伸和热定型后纤维力学性能明显提高,其断裂强度最大可达3.38 cN/dtex;升高热定型温度有利于提高纤维的尺寸稳定性,制备过程中热定型温度不应低于110℃。In order to study the dimension and mechanical stability of polyethylene/polypropylene (PE/ PP) bicomponent fibers prepared by the nonwoven spunlaid process, PE/PP bicomponent fiber samples were taken at different key process positions. The structure and properties of the fibers were measured by X-ray diffractometer, electronic single fiber strength tester, scanning electron microscope, and BEION fiber fineness test system. The results show that the degree of orientation and crystallinity of fiber gradually increase in the multistage drawing process, and the second stage drawing in the post-spinning process plays a major role in the orientation and crystallinity of fiber. The dimensional stability of fiber is not determined without heat setting, and the dry heat shrinkage is high. The mechanical properties of fiber after multistage drawing and heat setting are significantly improved, and the maximum breaking strength can reach 3. 38 cN/ dtex. The increase of heat setting temperature improves the dimensional stability of the fiber, and the heat setting temperature during preparation should not lower than 110 ℃.

关 键 词：熔融纺丝成网 聚乙烯/聚丙烯双组分纤维 多级拉伸 热定型 力学性能 

分 类 号：TS174.8[轻工技术与工程—纺织材料与纺织品设计]