| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a mold release film capable of facilitating the detection of foreign matters and defects in a polarizer, an optical retardation polarizing plate and an optical retardation plate for a large- sized TFT(thin film transistor) system or a STN(super twisted nematic) system by a visual inspection. SOLUTION: In the method for manufacturing the mold release film, on which a release layer mainly consisting of a silicone resin is formed by applying a coating liquid containing polydimethylsiloxane having a vinyl group and a hydrogen silane based compound in a specified ratio onto the surface of a polyester film and subsequently thermosetting the liquid, the polyester film satisfies that retardation value (R) is >=1,200 (nm), MOR(maximum oriented ratio) value measured by a microwave transmission molecular orientation meter is 1.3-1.8, difference between the minimum and maximum values of the MOR values is <=0.2 and number of pieces of foreign matters per 310.8 cm2 area is zero in the range of >=25μm and is <=10 in the range of >=5μm and <25μm. |
