| 摘要 |
PROBLEM TO BE SOLVED: To provide a protective film for a sheet polarizer, lowering drawing magnification and manufactured under the condition that a saponication liquid is hard to contaminate in a saponication process. SOLUTION: This protective film for a sheet polarizer includes a cellulose resin having 2-4C acyl substituent and having a degree of acyl substitution of 2.1-2.7, which satisfies 25≤Re≤100 and 50≤Rth≤300, and in which the cellulose resin contributes to optical expression of at least 40% or more of the Re in the film. COPYRIGHT: (C)2010,JPO&INPIT
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