Lianpeng Mei, Qingxue Zhang, Yan Sun
Due to the poor mobility of ultra-high molecular weight polyethylene (UHMWPE), its melt index is almost zero. At present, UHMWPE thin films are mainly made of UHMWPE sheets and machined. UHMWPE film can be stretched into sheet after melt extrusion, which has the advantages of low cost, energy saving and environmental protection, continuous production, high efficiency and simple operation. In this paper, the Polyflow software is used to simulate the melt flow behavior in the UHMWPE film flow channel. Through the analysis of the velocity field and pressure field in the flow channel, the regularities of distribution of the pressure and velocity fields of UHMWPE melt in the flow channel are obtained, and some suggestions for the extrusion die and process design are given.
UHMWPE; flim; Polyflow; extrusion die; flow channel