FILM FOR LIGHT TRANSMISSION LAYER OF OPTICAL DISK AND MANUFACTURING METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a film having physical properties and optical characteristics favorable as a film for a light transmission layer of an optical disk and to provide a manufacturing method of a polycarbonate film.

SOLUTION: The film for the light transmission layer of the optical disk comprises a polycarbonate resin film having 10 to 150 μm film thickness, ≤±3 μm thickness unevenness, ≥89% total ray transmittance and 0.05 to 0.8% dimension change ratio by heat after treatment at 100°C for 24 h.

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