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. 29, 2014
Filed:
Jul. 29, 2009
Kenichirou Tada, Ibaraki, JP;
Satoru Nakanishi, Ibaraki, JP;
Taku Yamaga, Ibaraki, JP;
Shun Ito, Ibaraki, JP;
Kenichi Watanabe, Ibaraki, JP;
Miyoshi Yokura, Mie, JP;
Masashi Kato, Mie, JP;
Hisashi Katsumata, Mie, JP;
Kenichirou Tada, Ibaraki, JP;
Satoru Nakanishi, Ibaraki, JP;
Taku Yamaga, Ibaraki, JP;
Shun Ito, Ibaraki, JP;
Kenichi Watanabe, Ibaraki, JP;
Miyoshi Yokura, Mie, JP;
Masashi Kato, Mie, JP;
Hisashi Katsumata, Mie, JP;
Hitachi Engineering & Services Co., Ltd., Ibaraki, JP;
Kawamura Sangyo Co., Ltd., Mie, JP;
Abstract
A low-temperature plasma treatment is applied to a surface of an aramid paper so as to allow the surface to have a compositional atomic ratio X (O/C) of the number of oxygen atoms (O) to the number of carbon atoms (C) ranging from 110% to 220% of a theoretical atomic ratio. The treatment is performed at an intensity ranging from 120 to 1500 W·min/mwith a low-temperature plasma treatment apparatus of internal electrode system. The aramid paper is superposed with a nonhydrolyzable resin film and the resulting article is pressurized to give an aramid-resin film laminate. The laminate is inexpensive, has both superior electrical properties and high mechanical strength, excels in elasticity, and is useful as an insulation material.