OPTICAL FILM BASED ON POLYCARBONATE FILM, ITS MANUFACTURING METHOD, OPTICAL FILM WITH PRESSURE-SENSITIVE ADHESIVE LAYER, ITS MANUFACTURING METHOD, OPTICAL HARD COAT FILM, OPTICAL HARD COAT FILM WITH PRESSURE-SENSITIVE ADHESIVE LAYER AND OPTICAL DISK

摘要

PROBLEM TO BE SOLVED: To provide an optical film based on a polycarbonate film and having a cured layer having substantially no flaw, an optical hard coat film, and an optical disk loaded with the optical hard coat film.;SOLUTION: The optical film is constituted by laminating a cured layer with an average film thickness of 1.0-8.0 m on a polycarbonate film base material produced by casting a dope on a casting band from a casting die. The number of protruded spot flaws (enclosing polycarbonate originating from the polycarbonate film base material) with a diameter of 50 m or above present in the cured layer of the optical film is 1 or below per 10 cm square on an average.;COPYRIGHT: (C)2006,JPO&NCIPI