| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a polarizing film less liable to crease or break and having good appearance because of few streaks. SOLUTION: In the method for manufacturing the polarizing film by sequentially subjecting a polyvinyl alcohol-based film to swelling, dyeing, boric acid treatment, washing and drying, the drying is carried out in multiple steps while applying tension to the film, the tension is controlled so that tension per unit width of the film in each step of the drying is made substantially constant, tension in the succeeding step is made lower than that in the preceding step, and a drying temperature in the succeeding step is made higher than that in the preceding step. COPYRIGHT: (C)2006,JPO&NCIPI |
