POLARIZER, METHOD FOR PRODUCTION THEREOF, POLARIZING PLATE, OPTICAL FILM, AND IMAGE DISPLAY

摘要

A polarizer of the present invention comprises stretched film that is obtained from a film by subjecting the film to at least a dyeing treatment with a dichroic material and a stretching treatment, wherein the film is made from a mixture containing a polyvinyl alcohol-based resin and a polycarboxylic acid compound having two or more carboxyl groups and/or one or more acid anhydride groups and a molecular weight of 1,000 or less. The polarizer can suppress degradation in optical properties to a minimum even at high temperature.