DEVICE FOR EXTRUDING FILM

摘要

PURPOSE:To prevent current from leaking to a die and to control electrolytic deterioration in the die and to stabilize operability and to increase productivity and quality of a film by using electrostatic adhesion and extruding a molten polymer to produce the film or a sheet. CONSTITUTION:In a die used in the case of extruding a molten polymer and forming a polymer film, both the vicinity of the lower end of a discharge port of the internal surface of at least lips on an inner wall surface touching the polymer and the vicinity of the lower end of the discharge port on the external surface of at least lips on the surface touching the outside air are coated with ceramic Pores of the coated ceramic layer are sealed by an inorganic sealing agent in particular.