Polarizer protection film
AssigneesSekisui Chemical Co., Ltd., Jsr Corporation
InventorsYasumasa Okada, Hitoshi Kobayashi, Shoji Nozato, Takahiko Sawada, Kazuaki Hiratani, Toshihiro Otsuki
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Abstract
A polarizer protection film for protecting a polarizer used in a liquid crystal display is obtained by using a film obtained by melt film formation of a norbornene resin having a glass transition temperature Tg of 135° C. to 180° C., and an inherent viscosity (ηinh) of 0.4 or more, measured at 30° C., in chloroform, wherein the Tg and ηinh are within the range indicated by the following equation (2): 45ηinh≦58.5−0.2Tg (2)
Claims12
A polarizer protection film obtained by melt film formation of a norbornene resin having (1) a glass transition temperature Tg (measured in accordance with JIS K 7121) of 135° C. to 180° C., and (2) an inherent viscosity (ηinh) of 0.4 or more, which is calculated by the following equation (1) from the drop time T (sec.) between marked lines measured at 30° C. with an Ubbelohde viscometer for a solution of the resin in chloroform having a resin concentration of C (g/dl) and the drop time B (sec.) between marked lines measured at 30° C. with an Ubbelohde viscometer for chloroform, the solvent, wherein (3) the above-mentioned Tg and ηinh are within the range indicated by the following equation (2):
- ηinh={ln(T/B)}/C (1)
- T:
- the drop time (sec.) between marked lines of a sample solution
- B:
- the drop time (sec.) between marked lines of a solvent alone
- C:
- the concentration (g/dl) of the sample solution
- 45ηinh≦58.5−0.2Tg (2).
A liquid crystal display in which the polarizing film for a liquid crystal display according to claim is laminated, with the interposition of a pressure-sensitive adhesive.
Dependencies are inferred from the claim text.