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:
May. 14, 2013
Filed:
Oct. 03, 2005
Applicants:
Nagayoshi Tsukane, Kawachinagano, JP;
Tatsuo Izumitani, Himeji, JP;
Inventors:
Nagayoshi Tsukane, Kawachinagano, JP;
Tatsuo Izumitani, Himeji, JP;
Assignee:
Daicel Chemical Industries, Ltd., Osaka-shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B 27/34 (2006.01); C08J 5/18 (2006.01); G02C 7/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A protective film for a polarizing membrane is provided which is prevented in light leakage generation, and excellent in moldability. The protective film contains a polyamide resin, and is subjected to an orientation (e.g., a drawing) to have a retardation value of not less than 300 nm. The polyamide resin may also contain an alicyclic polyamide resin, e.g., a resin whose monomers are an alicyclic diamine and an aliphatic dicarboxylic acid. The polyamide resin may have microcrystallinity. The Abbe number of the polyamide resin may be not less than 40.