| abstract |
(57) [Problem] To provide a film for optical use which has high heat resistance, high transparency, does not have fine projections or press scratches on the film surface, and has controlled optical characteristics, and a method for producing the same. A film comprising a polycarbonate resin obtained by copolymerizing 9,9-bis- (3-methyl-4-hydroxyphenyl) fluorene and 2,2-bis- (4-hydroxyphenyl) propane, 20 ~ An optical film having a thickness of 1000 μm, a total light transmittance of 80% or more, and a number of fine projections on the surface of 20 / mm 2 or less. 2.5 kg / square cm tension in the running direction of the film And the ambient temperature is (Tg-50) ° C. to (Tg -5) Manufactured by a drying process at a temperature of ° C. Is the glass transition temperature (° C.) of the polycarbonate resin). |