PRODUCTION OF BIAXIALLY STRETCHED POLYAMIDE FILM

摘要

PROBLEM TO BE SOLVED: To stably produce a simultaneously biaxially stretched polyamide film economically with good operability while reducing the cutting of the film. SOLUTION: In a method for grasping both end parts of an unstretched polyamide film 1 by a pair of the left and right clips 2 connected to a link device 3 rotated along an endless track to biaxially stretch the film in the longitudinal and lateral directions at the same time, air is blown against the link device 3 at the inlet of a stretching machine on this side of the position where the film is grasped by the clips 2 on the return line side of the link device 3 not grasping the film to cool the same.