The Analysis of Polymer Profile Coextrusion Processes Based on the Three-Dimensional Finite Element Simulation

The three-dimensional numerical simulation model of two polymer flowing through the column path was founded.The coextrusion process of joint club(LPDE/PS) was simulated used the finite element method.Such simulated results as the interfacial offset and shape,the velocity profile of inflow and outflow,the pressure dropped data and the effect of inflow flux to the interface were analyzed.It is found that the interface is lean to the polymer that has lower viscosity when the inflow flux is same.The difference of inflow flux ratio may affect the shape and location of the interface greatly.To get the steady flow,the inflow flux must be controlled strictly.At last the simulated interface shape was compared with experiment,and the simulated results were confirmed.