POLYVINIUM ALOHOL RESIN FOR USE FOR POLARIZING FILM FILM AND METHOD FOR PRODUCING THE SAME, POLYVINYLLOHOLOE FILM AND PROCESS FOR PRODUCING THE SAME, POLARIZING FILM, POLYVINYLLOHOL RESIN

摘要

The present invention is a polyvinyl alcohol-based resin for producing a polarizing film having a weight swelling degree of 1.4 to 1.65, which is calculated by the following formula (1). Therefore, a polyvinyl alcohol film excellent in transparency and dyeability required for producing a polarizing film free from display defects and polarization unevenness can be produced with high productivity. Weight swelling degree = (weight when immersed in water at 15 캜 for 1 hour and then centrifuged at 2,000 G for 1 minute) / (weight when dried at 105 캜 for 2 hours after centrifugation) (1)