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US 2009/0244705 A1Published application
Protective film for polarizers
AssigneeFUJIFILM Corporation
InventorsJun Takeda, Hiromichi Tachikawa, Masaya Suzuki, Mamoru Sakurazawa
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Abstract
A protective film for polarizers, including a cellulose resin having an acyl substituent with from 2 to 4 carbon atoms and having a degree of acyl substitution of from 2.1 to 2.7, which satisfies 25≦Re≦100 and 50≦Rth≦300 and in which the cellulose resin contributes to expression of at least 40% of the Re in the film.
Claims17
A protective film for polarizers, comprising a cellulose resin having an acyl substituent with from 2 to 4 carbon atoms and having a degree of acyl substitution of from 2.1 to 2.7,
- which satisfies 25≦Re≦100 and 50≦Rth≦300 wherein Re means retardation in the plane of the film and Rth means retardation in the thickness direction of the film, and
- in which the cellulose resin contributes to optical expression of at least 40% of the Re in the film.
Dependencies are inferred from the claim text.