Insulated conductor and insulated conductor manufacturing method

Patent metadata

Field	Value
Publication number	US-11430585-B2
Application number	US-201816758505-A
Country	US
Kind code	B2
Filing date	Nov 20, 2018
Priority date	Nov 21, 2017
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

An insulated conductor having a conductor and an insulating film provided on a surface of the conductor, in which the insulating film has a fluorine-containing resin composition layer including a cured product of a thermosetting resin and a fluororesin and a fluorine concentration gradient layer which is disposed between the conductor and the fluorine-containing resin composition layer. The fluorine-containing resin composition layer includes a cured product of a thermosetting resin and a fluororesin, and is provided with a concentration gradient in which a fluorine atom content decreases from the fluorine-containing resin composition layer side toward the conductor.

First claim

The invention claimed is:

1. An insulated conductor comprising:
a conductor; and
an insulating film provided on a surface of the conductor,
wherein the insulating film includes a fluorine-containing resin composition layer including a cured product of a thermosetting resin and a fluororesin and a fluorine concentration gradient layer which is disposed between the conductor and the fluorine-containing resin composition layer, includes a cured product of a thermosetting resin and a fluororesin, and is provided with a concentration gradient in which a fluorine atom content decreases from the fluorine-containing resin composition layer side toward the conductor.

2. The insulated conductor according to claim 1 ,
wherein the fluororesin included in the fluorine-containing resin composition layer is a thermoplastic resin, and the fluororesin included in the fluorine concentration gradient layer is a thermoplastic resin.

3. The insulated conductor according to claim 1 ,
wherein the fluorine-containing resin composition layer has a sea-island structure made up of a sea phase including the cured product of the thermosetting resin and an island phase including the fluororesin dispersed in the sea phase.

4. The insulated conductor according to claim 1 ,
wherein a difference between a fluorine atom content at a place with a lowest fluorine atom content in the fluorine concentration gradient layer and a fluorine atom content in a central region in a thickness direction of the fluorine-containing resin composition layer is 10 atom % or more.

5. The insulated conductor according to claim 1 ,
wherein a fluorine atom content at a place with a lowest fluorine atom content in the fluorine concentration gradient layer is 15 atom % or less.

6. The insulated conductor according claims 1 ,
wherein a place with a lowest fluorine atom content in the fluorine concentration gradient layer is in a range of 3 μm or less from the surface of the conductor.

7. The insulated conductor according to claim 1 ,
wherein a fluorine atom content in a central region in a thickness direction of the fluorine- containing resin composition layer is in a range of 20 mass % or more and 70 mass % or less.

8. The insulated conductor according to claim 1 ,
wherein the fluorine-containing resin composition layer and the fluorine concentration gradient layer are a continuous phase.

9. The insulated conductor according to claim 1 ,
wherein a thickness of the fluorine concentration gradient layer is in a range of 2 μm or more and 15 μm or less.

10. An insulated conductor manufacturing method for manufacturing the insulated conductor according to claim 1 , the method comprising:
an electrodeposition step of electrodepositing an electrodeposition liquid including thermosetting resin particles and fluororesin particles to a surface of the conductor to obtain an electrodeposition layer-attached conductor; and
a drying step of heating and drying the electrodeposition layer-attached conductor at a temperature in a range of (a melting point of the fluororesin particles −40° C.) to (the melting point of the fluororesin particles +30° C.).

11. The insulated conductor manufacturing method according to claim 10 ,
wherein a heating time in the drying step is five minutes or longer.

Assignees

• Mitsubishi Materials Corp

Inventors

• Iida Shintaro
• Sakurai Hideaki

Classifications

• C09D201/00

  Coating compositions based on unspecified macromolecular compounds · CPC title

• C25D13/16

  Wires; Strips; Foils · CPC title

• C08L79/08

  Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors · CPC title

• H01B3/445 Primary

  from vinylfluorides or other fluoroethylenic compounds · CPC title

• C08G73/14

  Polyamide-imides · CPC title