| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for efficiently manufacturing a phase difference compensating film which is little in bowing, has a slow axis direction facing a direction orthogonal with the longitudinal direction of the film and is good in accuracy of a slow axis angle in sequential biaxial stretching of subjecting a thermoplastic resin film to longitudinal stretching, then to lateral stretching. SOLUTION: The method for manufacturing the phase difference compensating film comprises sequential biaxial stretching of subjecting the thermoplastic resin film to longitudinal stretching, then to lateral stretching. In the longitudinal stretching, the thermoplastic resin film is longitudinally stretched in such a manner that its retardation value attains 20 to 150 nm. In the lateral stretching, the progression angle at the end of the thermoplastic resin film is specified to a range from 8 to 20 degrees outward with respect to the progression direction of the thermoplastic resin film prior to extension and the state thereof is continued to hold the distance≥2 times the width of the thermoplastic resin film prior to the extension. COPYRIGHT: (C)2004,JPO |
