Westerman, Hattori, Daniels & Adrian, LLP
Method of producing thin polarizing film involving in-air stretching, underwater stretching, and stretching while drying
A method of producing a thin polarizing film having an excellent polarization degree includes, forming a polyvinyl alcohol-based resin layer on a thermoplastic resin substrate to prepare a laminate, subjecting the laminate to underwater stretching in an aqueous solution of boric acid and stretching the laminate while drying the laminate after the underwater stretching.
NITTO DENKO CORPORATION
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Tomohiro Takashi Minoru Takeharu Shusaku
Mori Kamijo Miyatake Kitagawa Goto