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:
Dec. 24, 2019
Filed:
Feb. 27, 2017
Toray Advanced Film Co., Ltd., Tokyo, JP;
Tetsuya Machida, Takatsuki, JP;
Natsuki Nakamichi, Takatsuki, JP;
Norihide Inoue, Takatsuki, JP;
Naoko Tamura, Otsu, JP;
Ryosuke Matsui, Otsu, JP;
Masatoshi Ohkura, Otsu, JP;
Toray Advanced Film Co., Ltd., Tokyo, JP;
Abstract
A protective film is capable of protecting and preserving an optical sheet surface, particularly the back surface of a prism sheet, independent of the shape and composition thereof in a range of adhesive forces appropriate for various adherends. A layered film having an adhesive layer having a styrene-based elastomer as the main component thereof on at least one surface of a base material layer, the layered film characterized in that the loss tangent tan δ and the shear storage modulus G' of the elastomer at 1 Hz in a temperature range of 30-60° C. are within specific ranges.