| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical film that has high transparency and keeps high mechanical characteristic even at high temperature. SOLUTION: In the optical film, light transmittance in a wavelength of 550 nm is preferably 90% or higher. The optical film includes at least one surface layer A containing 4-methyl-1-pentene (co)polymer and at least one layer B containing a heat resistant resin. The glass transition temperature of the heat resistant resin is 120°C or higher. COPYRIGHT: (C)2010,JPO&INPIT
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