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. 26, 2016
Filed:
Jul. 09, 2010
Hiromoto Haruta, Ibaraki, JP;
Hirokazu Matsuda, Ibaraki, JP;
Tsuyoshi Inoue, Ibaraki, JP;
Kazuhito Okumura, Ibaraki, JP;
Osamu Kondo, Ibaraki, JP;
Yoko Muraoka, Ibaraki, JP;
Hiromoto Haruta, Ibaraki, JP;
Hirokazu Matsuda, Ibaraki, JP;
Tsuyoshi Inoue, Ibaraki, JP;
Kazuhito Okumura, Ibaraki, JP;
Osamu Kondo, Ibaraki, JP;
Yoko Muraoka, Ibaraki, JP;
NITTO DENKO CORPORATION, Osaka, JP;
Abstract
A transparent film, the back-face of which has excellent resistance to scratch and printability, and a surface protection film which has such a transparent film are provided. A transparent filmhas a substrate layerformed of a transparent resin material, and a back-face layerwith a thickness of 1 μm or less provided on a first faceA thereof. A percent change in coefficient of friction Δμ is less than 10% for the transparent filmwhen the percent change is determined from a coefficient of friction μof the back-face layer after being conserved at 50° C. and 15% RH for three days and a coefficient of friction μof the back-face layer after being conserved at 80° C. and 80% RH for three days, with an absolute value of difference between the two coefficients of friction |μ−μ| being divided by the smaller value of the two coefficients of friction.