METHOD FOR PREPARING POLYENE-BASED POLARIZING FILM, POLYENE-BASED POLARIZING FILM, LAYERED POLARIZING FILM, AND DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a method and the like for preparing a novel and improved polarizing film, capable of preparing a polarizing film having good optical properties.SOLUTION: According to an aspect of the present invention, a method for preparing a polyene-based polarizing film comprises the steps of: preparing a polyvinyl alcohol film by using a coating solution containing a polyvinyl alcohol; manufacturing a dry stretched film by dry stretching the polyvinyl alcohol film; and subjecting the dry stretched film to a dehydrating reaction by using an acid catalyst.