METHOD FOR MANUFACTURING OPTICAL FILM, OPTICAL FILM, POLARIZING PLATE, OPTICAL COMPENSATION FILM FOR LIQUID CRYSTAL DISPLAY PANEL, AND LIQUID CRYSTAL DISPLAY DEVICE

摘要

PPROBLEM TO BE SOLVED: To provide an optical film having a sufficiently large inclination structure, having a good surface feature, and showing little unevenness of an optical characteristic in an MD direction. PSOLUTION: In the method for manufacturing the optical film including a process of making a molten composition containing a thermoplastic resin pass between the first press-clamping surface and the second press-clamping surface constructing a press-clamping device to continuously press-clamp the resin and form the resin into a film, a moving speed of the first press-clamping surface is higher than a moving speed of the second press-clamping surface, the pressure between the first press-clamping surface and the second press-clamping surface is controlled to be not less than 20 MPa, shear force given to the film is controlled to be 3,000 to 30,000 N per meter width by the first press-clamping surface and the second press-clamping surface, and the first press-clamping surface and the second press-clamping surface are each driven by a drive motor connected via a planer rotary type decelerator. PCOPYRIGHT: (C)2011,JPO&INPIT