| 摘要 |
An optical film which is lowly hygroscopic, transparent, and highly heat-resistant and has greatly improved nonbrittleness. In particular, the optical film is suitable for use as a polarizer-protecting film in a large liquid-crystal display or a liquid-crystal display for outdoor use. The optical film is characterized by comprising an acrylic resin (A) and a cellulose ester resin (B) in a proportion of from 95/5 to 30/70 by mass, the acrylic resin (A) having a weight-average molecular weight (Mw) of 80,000 or higher and the cellulose ester resin (B) having a total degree of substitution with acyl (T) of 2.0-3.0, a degree of substitution with C 3-7 acyl of 1.2-3.0, and a weight-average molecular weight (Mw) of 75,000 or higher. The optical film may be further characterized in that the cellulose ester resin (B) has a total degree of substitution with acyl other than C 3-7 acyl of 1.3 or lower. |
