POLYVINYL ALCOHOL-BASED FILM, PRODUCTION METHOD THEREFOR, AND POLARIZATION FILM USING POLYVINYL ALCOHOL-BASED FILM

摘要

Provided are: a polyvinyl alcohol-based film that, when immersed in water, is able to reduce the elution amount of a polyvinyl alcohol-based resin, and is unlikely to become curled; a method for producing said polyvinyl alcohol-based film; and a polarization film using said polyvinyl alcohol-based film. The polyvinyl alcohol-based film according to the present invention is characterized in that, when immersed in 50°C water for one minute, the elution amount of a polyvinyl alcohol-based resin is not more than 900 ppm/m², and the curl angle measured under condition (A) in the short side direction is not more than 135°. (A) A condition in which a test object, comprising a 10 cm (long side) × 5 cm (short side) rectangular test piece cut out in a given direction from the polyvinyl alcohol-based film and a weight having a mass of 5 g and being attached to the center of a first longitudinal end section of the test piece, is suspended while being supported at the center of a second longitudinal end section of the test piece, and is entirely immersed in 30°C water for 10 seconds.