METHOD FOR MANUFACTURING POLARIZING FILM, POLY(VINYL ALCOHOL)-BASED RESIN FOR POLARIZING FILM, POLY(VINYL ALCOHOL)-BASED RESIN SOLUTION FOR POLARIZING FILM, POLARIZING FILM, AND POLARIZING PLATE

摘要

Provided is a method for manufacturing a polarizing film, and a poly(vinyl alcohol)-based resin for the polarizing film that allow the dyeing time to be reduced and the productivity of a polarizing film having minimal dyeing nonuniformities to be markedly reduced. This method for manufacturing a polarizing film comprises: a step for preparing a poly(vinyl alcohol)-based resin film formed by using a poly(vinyl alcohol)-based resin having a degree of saponification of 94-98.5 mol% and a degree of polymerization of 2500-3000, as calculated according to JIS K 6726; and a step for obtaining a polarizing film by using the poly(vinyl alcohol)-based resin film. This poly(vinyl alcohol)-based resin for the polarizing film has a degree of saponification of 94-98.5 mol% and a degree of polymerization of 2500-3000, as measured according to JIS K 6726.