聚酰亚胺纤维集聚混纺纱的工艺优化

Process Optimization of Polyimide Fiber Condensed Blended Yarn

探讨精梳棉/聚酰亚胺/粘胶40/30/309.8 tex集聚纱的纺纱工艺。选用1.67 dtex×51 mm聚酰亚胺纤维、1.33 dtex×38 mm粘胶纤维和新疆细绒棉,针对聚酰亚胺纤维体积比电阻大易起静电,混纺纤维长度差异大,该混纺纱在生产过程中出现的梳棉成网困难以及成纱细节多、强力低、色结高、纱疵高等质量问题,采用聚酰亚胺与粘胶先进行包混,在并条工序再和细绒棉精梳条进行条混的工艺路线。根据混纺纤维的性能特点,对聚酰亚胺纤维采用离子型抗静电剂预处理,通过优选纺纱速度、隔距等工艺参数、采用集聚纺以及使用加宽上下销等措施,成功纺制出聚酰亚胺纤维混纺纱。认为:聚酰亚胺与精梳细绒棉、粘胶混纺,虽然纤维性能差异大,长度差异大,但只要采取合适的工艺与纺专器材,就能纺制出满足质量要求且风格较为独特的纱线。

Spinning process of combed cotton/polyimide/viscose 40/30/309.8 tex condensed yarn was discussed.1.67 dtex×51 mm polyimide fiber,1.33 dtex×38 mm viscose fiber and Xinjiang medium cotton were selected.In view of large volume resistivity of polyimide fiber,which was easy to generate static electricity,the length difference of blended fiber was large.In production process of the blended yarn,to solve the difficulty of carding and yarn defects.Polyimide and viscose were used to package blending first,then the sliver was blended with medium cotton combed sliver in the drawing process.According to the blended fiber property,polyimide fiber was pretreated by ionic antistatic agent.By optimizing process parameters such as spinning speed and gauge,condensed spinning and widening top and bottom pins were adopted,polyimide fiber blended yarn was successfully spun.It is considered that although polyimide,combed medium cotton and viscose has large difference in fiber property and length,as long as appropriate technology and special spinning equipment are adopted,the yarn with unique style can be spun and meet the quality requirements.