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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 9034218 B1

PDFFull Text
Date of Patent:
May. 19, 2015

Filed:

Jan. 17, 2012

Cellulose ester film, method of manufacturing the same, polarizing plate and liquid crystal display

Applicant:

Minori Tamagawa, Tokyo, JP;

Inventor:

Minori Tamagawa, Tokyo, JP;

Assignee:

KONICA MINOLTA OPTO, INC., Tokyo, JP;

Attorney:

Lucas & Mercanti, LLP

Primary Examiner:

Bijan Ahvazi

Int. Cl.
CPC ...
F21V 9/00 (2006.01); G02B 5/02 (2006.01); G02C 7/10 (2006.01); G02F 1/361 (2006.01); G03B 11/00 (2006.01); B29C 41/26 (2006.01); B29C 55/06 (2006.01); B29C 55/08 (2006.01); B29C 55/14 (2006.01); B29C 55/16 (2006.01); C08B 3/16 (2006.01); C08J 5/18 (2006.01); C08K 5/51 (2006.01); C08L 1/10 (2006.01); C08L 1/14 (2006.01); G02B 27/28 (2006.01); G02B 5/30 (2006.01); B29K 1/00 (2006.01); G02F 1/1335 (2006.01);
U.S. Cl.
CPC ...
B29C 41/26 (2013.01); B29C 55/06 (2013.01); B29C 55/08 (2013.01); B29C 55/14 (2013.01); B29C 55/16 (2013.01); B29K 2001/00 (2013.01); B29K 2001/12 (2013.01); B29K 2995/0034 (2013.01); C08B 3/16 (2013.01); C08J 5/18 (2013.01); C08J 2301/14 (2013.01); C08K 5/51 (2013.01); C08L 1/10 (2013.01); C08L 1/14 (2013.01); G02B 5/3033 (2013.01); G02F 1/133528 (2013.01);
Abstract

An object of this invention is to provide a cellulose ester film which satisfies the requirement 0.95<plasticizer content of A surface/plasticizer content of B surface<1.05, provided that A surface represents one surface of the cellulose ester film and B surface represents the other surface, has a high sound velocity of the film and is excellent in light leakage and color unevenness, and a film-forming method of this cellulose ester film. The cellulose ester film of the present invention, which contains a cellulose ester, is characterized by satisfying the requirement 0.95<plasticizer content of A surface/plasticizer content of B surface<1.05, provided that A surface represents one surface of the cellulose ester film and B surface represents the other surface, and having a sound velocity along at least one of a film transport direction and the lateral direction at 23.° C. 55% RH of 2.0-2.7 km/s.

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