| 摘要 |
PROBLEM TO BE SOLVED: To provide a production method of a phase difference film having little variance of phase difference in the plane direction when a phase difference film is produced by stretching a source web film having a specified range of the solvent content by soln. flowing method. SOLUTION: In this method, a source web film having <10wt.% solvent content is produced by soln. flowing method, and the obtd. source web film and a protective film wider than the source web film are laminated in such a manner that the both ends of the source web film in the width direction are aligned inside of the protective film. The laminated films are wound on a roll and stored. The source web film wound on the roll is then peeled from the protective film and stretched. |
