Numerical investigation of the geometrical effects on UHMWPE flow characteristics in small aperture spinneret orifice

2015 Global Conference on Polymer and Composite Materials

材料科学;化学

Qin, Shengxue^1 ; Zhang, Zhanhuan^1 ; Xu, Xingming^2 ; Liu, Jie^1 ; Liu, Hong^1

College of Mechanical and Electrical Engineering, Shandong University of Science and Technology, Qingdao, China^1

College of Mechanical and Electrical Engineering, Tai-an Campus of Shandong University of Science and Technology, Tai-an, China^2

关键词: Flow charac-teristics;    Geometrical effect;    High viscosities;    Length to diameter ratio;    Melt spinning process;    Numerical investigations;    Polymer rheology;    Spinning forming;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/87/1/012063/pdf
DOI  :  10.1088/1757-899X/87/1/012063

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Due to high viscosity of the ultra-high molecular weight polyethylene (UHMWPE), it is difficult for the melt UHMWPE to flow through the small aperture spinneret orifice in the melt spinning forming process. The geometrical parameters of the spinneret orifice become critical to the melt spinning process. Based on the theory of polymer rheology, the finite element model of UHMWPE melt spinning had been developed by using POLYFLOW, and the length-to-diameter ratio and taper angle of the spinneret orifice effects on the UHMWPE melt flow characters were discussed. The results show that suitable length-to-diameter ratio and taper angle are helpful for the compactness and flow stability of the melt.