Patent ID: 9645293
Date: 2017-05-09
CPC Classifications: B32B,G02B

Claim:
1. A method of manufacturing a thin film polarizer, comprising: forming a film laminate by allowing a non-oriented polyvinyl alcohol-based film to be bonded to and sandwiched between two or more non-oriented polymer films using attractive force or an adhesive layer; orienting the film laminate so that the polyvinyl alcohol-based film has a thickness of 10 μm or less; and separating the polymer films and the polyvinyl alcohol-based film of the oriented film laminate from each other, wherein adhesion between the polyvinyl alcohol-based film and the polymer film after the orienting of the film laminate is 2N/2 cm or less, wherein the non-oriented polymer film comprises one or more selected from a group including a high-density polyethylene film, a polyurethane film, a polypropylene film, a polyolefin film, an ester-based film, a low-density polyethylene film, high-density polyethylene and low-density polyethylene coextrusion films, a copolymer resin film containing ethylene vinyl acetate in high-density polyethylene, an acrylic film, a polyethylene terephthalate film, and a polyvinyl alcohol-based film, wherein the orienting of the film laminate is performed through wet orientation at a temperature of 20° C. to 85° C. at an orientation magnification of 5 to 15 times, and wherein one or more sheets of thin film polarizer are obtained by separating two or more polymer films and one or more polyvinyl alcohol-based film of the oriented film laminate from each other.