| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an iodine-based polarizing film and a polarizer which use a polyvinyl alcohol resin as their base and have improved durability, and to provide a manufacturing method for the polarizing film. <P>SOLUTION: An iodine polarizing film is provided which consists of a polyvinyl alcohol resin film with iodine absorbed and aligned, the polyvinyl alcohol resin film containing further saponin. When the polarizing film is manufactured through a process for uniaxially orienting the polyvinyl alcohol resin film, a process for dyeing the polyvinyl alcohol resin film in an aqueous solution containing iodine, a process for immersing the dyed polyvinyl alcohol resin film in a solution containing boric acid, and a process for rinsing it after the immersion treatment in the aqueous solution containing boric acid, this polarizing film can be manufactured by causing saponin to be dissolved and contained in the aqueous solutions used in the above iodine dyeing process and thereafter. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
