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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.:

US 10228501 B1

PDFFull Text
Date of Patent:
Mar. 12, 2019

Filed:

Sep. 21, 2015

Method for manufacturing polarizer, and polarizer and polarizing plate manufactured using same

Applicant:

Lg Chem, Ltd., Seoul, KR;

Inventors:

Jae Il Ryu, Daejeon, KR;

Eung Jin Jang, Daejeon, KR;

Jin Yong Park, Daejeon, KR;

Eungki Lee, Daejeon, KR;

Hyung Koo Kang, Daejeon, KR;

Taek Geun Nam, Daejeon, KR;

Deok Woo Park, Daejeon, KR;

Young Gon Kim, Daejeon, KR;

Yeon Soo Kim, Daejeon, KR;

You Kyeong Kim, Daejeon, KR;

Assignee:

LG CHEM, LTD., Seoul, KR;

Attorney:

Dentons US LLP

Primary Examiner:

Frank G Font

Int. Cl.
CPC ...
G02B 5/30 (2006.01); B32B 27/30 (2006.01); C09B 67/36 (2006.01); C08J 5/18 (2006.01); C09B 67/02 (2006.01); B29D 11/00 (2006.01); G02B 1/14 (2015.01); B29C 55/02 (2006.01); B29C 55/00 (2006.01); B29K 29/00 (2006.01);
U.S. Cl.
CPC ...
G02B 5/3025 (2013.01); B29C 55/005 (2013.01); B29C 55/02 (2013.01); B29D 11/00644 (2013.01); B32B 27/30 (2013.01); C08J 5/18 (2013.01); C09B 67/0079 (2013.01); C09B 67/0097 (2013.01); G02B 1/14 (2015.01); G02B 5/3033 (2013.01); B29K 2029/04 (2013.01); B32B 2307/42 (2013.01); C08J 2329/04 (2013.01);
Abstract

The present invention relates to a method for manufacturing a polarizer, including: a) immersing and swelling a polyvinyl alcohol-based film in an aqueous solution containing an azo-based dye having an absorption wavelength of 300 nm to 550 nm; b) dyeing the swollen polyvinyl alcohol-based film with an iodine-based dye; and c) stretching the dyed polyvinyl alcohol-based film, and a polarizer manufactured using the method.

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