| 摘要 |
PURPOSE:To produce a phase difference film reduced in the irregularity of a retardation value. CONSTITUTION:When a phase difference film is produced by stretching a film composed of polycarbonate with a viscosity averal mol.wt. of 10,000-200,000, a film composed of polycarbonate containing 0.3-5.0wt.% of 1,3-dioxolane is stretched. |
