UNIT AND PROCESS FOR THE PRODUCTION OF TUBULAR RESIN FILM

摘要

A unit for producing stably a resin film product having a small and uniform film thickness and an even surface, which product could not be obtained by current tube extrusion or blown film extrusion, from a thermoplastic resin; and a process for producing the film product. A unit provided with a heat-extrusion machine (1) for extruding a molten thermoplastic resin into a tube and a core (2) which exudes a gas toward the inner wall of the tube to form the tube into a tubular resin film (20), wherein a means (4) of stabilizing the shape of the tube is set between the nozzle (3) of the heat-extrusion machine (1) and the core (2).