Lowe Hauptman & Ham, LLP
Method for manufacturing optical film laminate including polarizing film
A method for manufacturing an optical film laminate including subjecting a laminate including 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 comprising a stretched intermediate consisting of a molecularly oriented polyvinyl alcohol type resin, impregnating the dichroic material in the stretched laminate to form a dyed laminate including a dyed intermediate comprising a polyvinyl alcohol type resin layer having the dichroic material impregnated therein in an oriented state, and stretching the dyed laminate in boric acid solution to form an optical film laminate.
Nitto Denko Corporation
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Tomohiro Shusaku Minoru Takashi Takeharu
Mori Goto Miyatake Kamijo Kitagawa