PROCESS AND AN EXTRUSION DIE FOR ELIMINATING SURFACE MELT FRACTURE DURING EXTRUSION OF THERMOPLASTIC POLYMERS

摘要

Process and apparatus for substantially eliminating surface melt fracture during extrusion of a thermoplastic polymer such as a molten linear low density polyethylene, by using a die (1, 4) having an elastic coating (2, 3, 5) on its inner surface adjacent the die exit.