异纤度异收缩化纤长丝纺丝原理分析  

Study on the formation of differential linear density and differential shrinkage filaments

作　　者：姜岩[1] 

机构地区：[1]温州大学服装学院,浙江温州325035

出　　处：《纺织学报》2007年第9期4-7,14,共5页Journal of Textile Research

摘　　要：通过纺丝直接制取异纤度、异收缩丝对化纤长丝短纤维化产品开发具有重要的产业化价值,探明在同一纺程下形成不同粗细丝条间的沸水收缩率差异的原理也具有重要的现实意义。结合普通单螺杆挤出机的纺丝条件,利用理论分析得出:在同一纺丝线上,细丝冷却速度快,冷却长度短,拉伸应变速率也大,初生丝具有较高的大分子取向度和较大的沸水收缩率;但在随后的拉伸过程中,细丝的结晶速率远高于粗丝的结晶速率,可获得更大的结晶度和较小的沸水收缩率,而较粗的丝条则形成了高收缩长丝。Spinning differential linear density and differential shrinkage filaments directly has great significance in the development of wool-like products. So to research and find out how the differential shrinkage filaments come into being in the same spinning process is also a meaningful work. In terms of a single screw extruder spinning, it can be assumed through theory discussion that the fine filaments are cooled faster with a smaller cooling length, and have a bigger drawing strain rate. The fresh formed fine filaments have a higher macromolecular degree of orientation and a higher boiled water shrinkage. But during the subsequent drawing the crystallization rate of the fine filaments is far higher than that of the coarse ones. So, the fine filaments can be imparted a high crystallinity and lower boiled water shrinkage. On the contrary, the coarse filaments turn into high shrinkage filaments.

关 键 词：异收缩 异纤度 长丝 原理 变形纱 

分 类 号：TS102.6[轻工技术与工程—纺织工程]