| 摘要 |
PROBLEM TO BE SOLVED: To smoothly pass a film to a tenter even in the case of a high speed production and to reduce a scrap generation amount by passing the film to the tenter at a lower speed than a predetermined speed at an inlet of the tenter at the time of producing. SOLUTION: A uniaxially oriented film 11 is passed through a film feeding direction switching means 12, then introduced into a tenter 13, preheated in the tenter 13, and then laterally oriented to form a biaxially oriented film 14. A suction belt 45 is provided as a film conveying means for guiding the film 11 to a film grasping position 44 of the tenter 13 at an inlet of the tenter 13. The film 11 is grasped by a clip 46. In this case, a speed of the tenter 13 is set to a normal production speed at the inlet of the tenter 13, i.e., not higher speed than a predetermined speed. Then, a take-up unit or a winder is started at the same speed as a film passing speed at the tenter 13, and the film from the tenter 13 is wound by the take-up unit or the winder. |
