METHOD FOR PRODUCING LONG STRETCHED FILM AND METHOD FOR PRODUCING CIRCULARLY POLARIZING PLATE

摘要

An aspect of the present invention is to provide a method for producing a long stretched film which comprises a long original film supplying step to supply a long original film made of a thermoplastic resin, an obliquely stretching step to obliquely stretch the long original film in a predetermined direction oblique relative to the width direction, and a winding step to wind the long stretched film after the obliquely stretching step. In the long original film supplying step, the long original film is supplied from a direction different from the winding direction of the long stretched film. In the obliquely stretching step, the long original film is stretched in a predetermined direction oblique relative to the winding direction. In the long original film supplying step, the long original film to be supplied has bowing in the reverse direction of the bowing generated in the obliquely stretching step.