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:
Sep. 17, 2019
Filed:
Feb. 26, 2018
Sumitomo Electric Industries, Ltd., Osaka-shi, Osaka, JP;
Shigeyuki Tanaka, Osaka, JP;
Shinya Nishikawa, Osaka, JP;
Hiroyuki Okawa, Kanuma, JP;
Takaya Kohori, Kanuma, JP;
Yuhei Mayama, Kanuma, JP;
Takayuki Hirai, Kanuma, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka-shi, Osaka, JP;
Abstract
A core electric wire for a multi-core cable according to an aspect of the present invention comprises a conductor obtained by twisting element wires, and an insulating layer covering the conductor, a principal component of the insulating layer being a copolymer of ethylene and an α-olefin having a carbonyl group; the α-olefin content in the copolymer being 14% to 46% by mass; and a mathematical product C*E being 0.01 to 0.9, wherein C is a linear expansion coefficient of the insulating layer at from 25° C. to −35° C., and E is a modulus of elasticity thereof at −35° C. Average area of the conductor in the transverse cross section is 1.0 to 3.0 mm. Average diameter of the element wires in the conductor is 40 to 100 μm, and number of the element wires is 196 to 2,450.