| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical compensation film having an alignment layer formed on a transparent substrate and having a liquid crystal compound coating layer thereon, or a composite polarizing plate comprising the film with the transparent support side laminated on a polarizer, wherein the waterproofing properties of the film or the plate is improved, by preventing interlayer peeling or fracture in a layer under heat and moisture conditions, even if the optical compensation film contains a layer having low waterproofing property. <P>SOLUTION: The composite polarizing plate comprises an optical compensation film 2, having an alignment layer 4 formed on a transparent support 3 made of cellulose resin and further, having a liquid crystal compound coating layer 5 thereon, with the transparent support 3 side of the film being laminated on one surface of a polarizer 1. The optical compensation film 2 is heat treated, in such a manner that when the film 2 cut into a 2 cm×5 cm rectangle is curled into a cylinder, having a 5 cm perimeter and 2 cm height with the liquid crystal coating layer inside and immersed in hot water at 60°C for 60 minutes, the density of air bubbles generating from the film is lower than 100 pieces/cm<SP>2</SP>. <P>COPYRIGHT: (C)2008,JPO&INPIT |
