METHOD FOR MANUFACTURING POLYVINYL ALCOHOL FILM AND POLARIZING FILM

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a polyvinyl alcohol film which has a uniform thickness suitable for a polarizing film and is excellent in surface smoothness and the polarizing film having uniform polarization performance made with the use of the polymer film. SOLUTION: When a film-making raw material 4 containing polyvinyl alcohol is discharged on a metal roll 6 into a film, the angleθ1 made by a plane A connecting the central axis 7 of the metal roll 6 and a die discharge part 3 and a plane B connecting the central axis 7 of the metal roll 6 and the apex 8 of the metal roll 6 is set up to be 20 or below, and the distance between the die discharge part 3 and the surface of the metal roll 6 is set up to be 10 mm or below.