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:
Oct. 08, 2019
Filed:
Nov. 26, 2010
Shigeyoshi Masuda, Gifu, JP;
Dai Nakagawa, Gifu, JP;
Kinji Hasegawa, Gifu, JP;
Masanori Nishiyama, Gifu, JP;
Shigeyoshi Masuda, Gifu, JP;
Dai Nakagawa, Gifu, JP;
Kinji Hasegawa, Gifu, JP;
Masanori Nishiyama, Gifu, JP;
TEIJIN LIMITED, Tokyo, JP;
Abstract
Provided is a highly insulating film having excellent electrical characteristics (breakdown voltage), heat resistance, and handling properties such as windability and processability. The highly insulating film is a biaxially stretched film made of a styrene polymer having a syndiotactic structure as a main component. The highly insulating film contains specific inert fine particles A, antioxidant, and polymer Y having a glass transition temperature Tg by DSC of 130° C. or more each in a specific amount, and has a refractive index in the thickness direction of 1.5750 or more and 1.6350 or less.