摘要
基于Polyflow专用软件,对十字形纤维挤出成形过程进行模拟计算。结果表明:熔体从喷丝孔挤出后速度分布的变化与熔体挤出胀大是同时发生的,表面张力是引起纤维截面变化的主要作用因素,并初步确定了十字形纤维挤出变形距离喷丝板的大致范围,在设计喷丝孔时应考虑到表面张力对纤维成形过程的影响。在设计喷丝孔之前应对熔体挤出过程进行逆向挤出模拟计算,以保证得到所需的异形截面纤维。研究成果对于异形纤维的开发有理论参考作用。
The numerical simulation of the extrusion-forming process of cross fibers was performed based on Polyflow software.The simulated results revealed that the change of velocity distribution of the melt after extrusion from the spinneret and the extrusion swell of the polymer melt occurred simultaneously.The surface tension dominated the fiber section variation and initially determined the range of the deformation distance of the cross fiber.So the effect of surface tension on the forming process of the fiber should be taken into consideration when designing the spinneret orifice.To obtain the accurate cross section of a profile fiber,the numerical simulation of the backward extrusion process of polymer melt should be accomplished before making design of spinneret orifice.These findings provide a theoretical reference for the development of profile fibers.
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2011年第7期132-136,共5页
Journal of Textile Research
基金
中央高校基本科研业务费资助项目(9D10306)
高等学校博士学科点专项科研基金资助项目(10W10324)
