polarizing film, a manufacturing method of polarizing film for the PVA-based resin film and a polarizing film

摘要

PROBLEM TO BE SOLVED: To provide a polarization film that can be subjected to coloring in a short time period and manufactured at high productivity.;SOLUTION: The polarization film is obtained by subjecting a PVA based resin film comprising a PVA based copolymer to coloring and stretching. The PVA based copolymer is a copolymer obtained by saponifying a polymer obtained by copolymerizing a vinyl ester monomer and at least one kind of comonomer selected from a group consisting of a vinyl amine, an N-vinyl carboxylic acid amide, a (meta)acrylamide propane sulfonic acid and salts thereof.;COPYRIGHT: (C)2012,JPO&INPIT