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:
Feb. 05, 2019
Filed:
Aug. 28, 2013
Hitachi Metals, Ltd.;
Takami Ushiwata, Hitachi, JP;
Yuki Honda, Hitachi, JP;
Shuta Nabeshima, Hitachi, JP;
Hideyuki Kikuchi, Hitachi, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
An insulated wire includes a conductor, and a polyimide insulation layer formed on an outer periphery of the conductor. The insulation layer includes a polyimide including a repeating unit represented by formula (1) and a repeating unit represented by formula (2). A first acid component in the repeating unit represented by the formula (1) and a second acid component in the repeating unit represented by the formula (2) are mixed in a molar ratio range of 85:15 to 40:60 as expressed by a molar ratio (the first acid component:the second acid component). R as a residue of a diamine component in the formulas (1) and (2) includes a residue of 4,4'-diaminodiphenyl ether and a residue of one selected from a group of diamines represented by the formulas (3) to (8). A storage elastic modulus of the polyimide at 325° C. is not less than 50 MPa.