Polarizing plate

Abstract

Abstract PURPOSE:To obtain a polarizing plate having superior heat resistance, water resistance and moisture resistance and suitable for liq. crystal display or the like by adhering a cellulose acetate film having a transparent thin film of magnesium oxide formed on the surface to the surface of a polarizing film. CONSTITUTION:A polarizing element such as iodine or Direct Blue 1 is adsorbed on a hydrophilic polymer film such as a polyvinyl alcohol film, and the film is stretched to orient the polarizing element. By the orientation, polarizing performance is provided to form a polarizing film. A transparent thin film of magnesium oxide is formed on at least one side of a cellulose acetate film such as a cellulose triacetate film by vacuum deposition or other method. The cellulose acetate film is adhered to at least one side of the polarizing PVA film so that the magnesium oxide layer contacts with the polarizing film. Thus, the desired polarizing plate is obtd.

Inventors

• 👤 Kazuaki Miyamoto
• 👤 和明 宮本
• 👤 Shigemasa Kawai
• 👤 河合　重征
• 👤 Hitoshi Kobayashi
• 👤 仁 小林

Bibliographic Details