Patent ID: 8999464
Filing Date: 2015-04-07
Classification: C09K,G02B,Y10T

Abstract:
1. An optical film having three layers consisting of: a core layer containing a (meth)acrylic resin having a lactone ring structure and having a thickness of from 10 to 100 μm, wherein the lactone ring structure is represented by the following formula (1): wherein R two outer layers wherein each one outer layer is formed on both sides of the core layer, the outer layer containing a cellulose acetate and having a thickness of from more than 3 μm to 20 μm, wherein the cellulose acetate resin satisfies the following condition: wherein TA2 means the degree of substitution with acyl group having 2 carbon atoms, and wherein the proportion of the total thickness of the outer layers to the total thickness of the film is from 2 to 20%.