THE METHOD PRODUCING CELLULOSE ACYLATE FILM BY USING COOLING EQUIPMENT

摘要

PURPOSE: A method for producing a cellulose acylate film using cooling equipment is provided to improve the efficiency of film production by using a pin tenter and a clip tenter together. CONSTITUTION: A method for producing a cellulose acylate film using cooling equipment is as follows. A dope containing cellulose triacetate solution is casted on the upper running part of a casting belt and cold air is discharged through upper and lower drying air supply ducts of the upper and lower running parts of the casting belt to dry the film. The film separated from the casting belt is transferred and dried by a pin tenter(500). The right or left part of the film held by the pin of the pin tenter is removed. The film is stretched by a clip tenter(600). The right or left part of the film held by the clip of the clip tenter is removed. The film is dried through a drier(700) and the right and left parts of the film are partly removed. The right and left parts of the film are partly carved, and the film is rolled.