METHOD FOR MANUFACTURING POLARIZER AND POLARIZER MANUFACTURED BY THE SAME

摘要

The present specification relates to a method for manufacturing a polarizer and a polarizer manufactured by using the same, and more particularly, to a method for manufacturing a polarizer, which includes a cross-linking and elongating step using an aqueous solution including a polyvalent carboxylic acid compound and a boric acid compound, and a polarizer manufactured by using the same.

主权项

1. A method for manufacturing a polarizer, the method comprising:
a step of dyeing at least one dye of iodine and dichromatic dyes on a polyvinyl alcohol-based film; a first cross-linking and elongating step of cross-linking and elongating the polyvinyl alcohol-based film and the dye by using a first aqueous solution including a polyvalent carboxylic acid compound and a boron compound; a second cross-linking and elongating step of cross-linking and elongating the polyvinyl alcohol-based film and the dye by using a second aqueous solution including the polyvalent carboxylic acid compound and the boron compound; and a step of drying the polyvinyl alcohol-based film, wherein the first cross-linking and elongating step and the second cross-linking and elongating step satisfy the following Equations (1) and (2):
X+Y≧0.1   Equation (1)XY≧0.002   Equation (2) in Equations (1) and (2), X is [a content of the polyvalent carboxylic acid compound of the first aqueous solution]/[a content of the boron compound of the first aqueous solution] of the first cross-linking and elongating step, and Y is [a content of the polyvalent carboxylic acid compound of the second aqueous solution]/[a content of the boron compound of the second aqueous solution] of the second elongating and cross-linking step.