The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 2017
Filed:
Apr. 28, 2010
Applicants:
Hiroaki Sawada, Ibaraki, JP;
Takeharu Kitagawa, Ibaraki, JP;
Takashi Kamijo, Ibaraki, JP;
Inventors:
Assignee:
NITTO DENKO CORPORATION, Ibaraki-Shi, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B05D 5/06 (2006.01); B05D 3/00 (2006.01); G02B 5/30 (2006.01); G02F 1/1335 (2006.01); G02B 1/08 (2006.01); C08J 5/18 (2006.01); C08J 7/04 (2006.01);
U.S. Cl.
CPC ...
G02B 1/08 (2013.01); C08J 5/18 (2013.01); C08J 7/04 (2013.01); G02B 5/3033 (2013.01); B32B 2457/202 (2013.01); C08J 2385/04 (2013.01); C08J 2429/04 (2013.01); Y10T 428/265 (2015.01);
Abstract
A method for producing a polarizer comprises the steps of: (A) stretching a polyvinyl alcohol-based resin layer to obtain a stretched layer; (B) immersing the stretched layer in a dyeing liquid containing iodine to obtain a dyed layer in which absorbance thereof determined from a tristimulus value Y is from 0.4 to 1.0 (transmittance T=40% to 10%); and (C) removing a part of iodine adsorbed in the dyed layer so that the absorbance of the dyed layer decreases by 0.03 to 0.7, provided that the absorbance of the dyed layer is controlled so that it does not become less than 0.3.