Simulation of Coextrusion Flows of Polymer Melts

Coextrusion of flat films and sheets involves the simultaneous extrusion from a single die of multiple layers of polymer melts. Multilayer coextrusion provides an important approach to provide unique product properties through the selection and combination of different polymers within one product. Two families of dies include manifold dies, where the melts meet outside the die, and feedblock dies, where the melts flow in contact within the die …