Patent ID: 8852374

Claim:
A method for manufacturing an optical film laminate including a polarizing film comprising polyvinyl alcohol type resin formed on a non-crystallizable ester type thermoplastic resin substrate in the form of a continuous web and having a dichroic material impregnated therein in an oriented state, the method comprising steps of: subjecting a laminate comprising the non-crystallizable ester type thermoplastic resin substrate and the polyvinyl alcohol type resin layer formed on the non-crystallizable ester type thermoplastic resin substrate to an elevated temperature in-air stretching to form a stretched laminate including a stretched intermediate consisting of a molecularly oriented polyvinyl alcohol type resin by; impregnating the dichroic material in the stretched laminate to form a dyed laminate including a dyed intermediate comprising the polyvinyl alcohol type resin layer having the dichroic material impregnated therein in an oriented state; and stretching the dyed laminate in a boric acid solution to form the optical film laminate including the polarizing film including the polyvinyl alcohol type resin having the dichroic material impregnated therein in an oriented state.