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:
Apr. 13, 2010
Filed:
Sep. 14, 2005
Ryu Takeko, Ashiya, JP;
Akira Kawamura, Izumisano, JP;
Atsushi Higo, Toyonaka, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
Abstract
An optical laminate comprising an anti-reflection film, polarizing film, adhesive layer, glass cell for liquid crystal display, adhesive layerand polarizing filmlaminated sequentially, wherein the ratio (B/A) of the maximum value B of the loss tangent of the adhesive layerto the maximum value A of the loss tangent of the adhesive layeris 1.1 or more. The maximum value of the loss tangent means the maximum value of loss modulus (E″) storage modulus (E') (=tan δ), each measured by heating the adhesive layer in a temperature range of −70° C. to 200° C. at a temperature rising rate of 4° C./min and a frequency of 1 Hz.