公开(公告)号：US11450450B2

公开(公告)日：2022-09-20

申请号：US17034237

申请日：2020-09-28

Applicant: ESSEX FURUKAWA MAGNET WIRE JAPAN CO., LTD.

Inventor： Natsuko Hara ,  Keisuke Ikeda ,  Daisuke Muto

IPC: H01B7/02 ,  H01B3/42 ,  H01B13/06 ,  H01F5/06

Abstract: An insulated wire comprising a conductor and a bubble-containing insulating layer, directly or indirectly coating the outer periphery of the conductor and containing a thermosetting resin, wherein the bubbles in the bubble-containing insulating layer include flattened bubbles whose oblateness in the cross-section perpendicular to the longitudinal direction of the insulated wire (lateral length of the bubble cross-sectional shape/vertical length of the bubble cross-sectional shape) is 1.5 or more and 5.0 or less.

公开(公告)号：US11437163B2

公开(公告)日：2022-09-06

申请号：US17037013

申请日：2020-09-29

Applicant: ESSEX FURUKAWA MAGNET WIRE JAPAN CO., LTD.

Inventor： Natsuko Hara ,  Keiichi Tomizawa ,  Hideo Fukuda

IPC: H01B3/30 ,  C08G73/10 ,  C09D179/08

Abstract: An insulated wire, containing a conductor and an insulating film provided in contact with the conductor, in which the insulating film provided in contact with the conductor contains a polyimide resin, and the polyimide resin contains a constituting unit (A) derived from 2,2-bis[4-(4-amininophenoxy)phenyl]propane and a constituting unit (B) derived from 9,9-bis(4-aminophenyl)fluorene as a diamine-derived constituting unit; the polyimide resin has an imide group concentration of 25.0% or less; and the ratio of the content of the constituting unit (B) occupied in the diamine-derived constituting unit in the polyimide resin is 1 to 40 mol %.