Multilayer insulated wire, coil, and electrical/electronic equipment

Patent metadata

Field	Value
Publication number	US-10032540-B2
Application number	US-201615192223-A
Country	US
Kind code	B2
Filing date	Jun 24, 2016
Priority date	Dec 26, 2013
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

A multilayer insulated wire having a polyester-based resin layer formed of a polyester-based resin containing at least a trihydric or higher hydric alcohol constituent on a conductor, and a PEEK resin layer formed of polyether ether ketone or modified polyether ether ketone, directly or by interposing an intermediate layer, on the polyester-based resin layer; a coil formed by winding processing the insulated wire, and electronic/electrical equipment having the coil.

First claim

The invention claimed is:

1. A multilayer insulated wire, comprising a polyester-based resin layer formed by applying and baking a varnish of a polyester-based resin containing at least a trihydric or higher hydric alcohol constituent on a conductor, and a PEEK resin layer formed of polyether ether ketone or PEEK-based PPS, PES, PPSU or PEI polymer alloys, directly or by interposing an intermediate layer, as an extrusion covering on the polyester-based resin layer.

2. The multilayer insulated wire according to claim 1 , wherein a content of the trihydric or higher hydric alcohol constituent is 30 to 90 mol % based on the total number of moles of the alcohol constituent that forms the polyester-based resin.

3. The multilayer insulated wire according to claim 1 , wherein the trihydric or higher hydric alcohol constituent is a constituent derived from aliphatic alcohol.

4. The multilayer insulated wire according to claim 1 , wherein the trihydric or higher hydric alcohol constituent is a constituent derived from one or more compounds comprising trihydroxyethyl isocyanurate, glycerol or trimethylolpropane.

5. The multilayer insulated wire of claim 1 , wherein a total thickness of the polyester-based resin layer, the intermediate layer, if present, and the PEEK resin layer is 70 to 250 μm, and a proportion of the thickness of the PEEK resin layer to the total thickness is 20 to 70%.

6. The multilayer insulated wire according to claim 1 , wherein the conductor has a rectangular cross-section.

7. A coil formed by winding processing the multilayer insulated wire according to claim 1 .

8. Electronic/electrical equipment, comprising the coil according to claim 7 .

9. A multilayer insulated wire, comprising:
a polyester-based resin layer, comprising a polyester-based resin, which comprises at least a trihydric or higher hydric alcohol constituent, wherein the polyester-based resin layer is in direct contact with and around an outer periphery of a conductor; and
a PEEK resin layer, comprising polyether ether ketone or modified polyether ether ketone PEEK-based PPS, PES, PPSU or PEI polymer alloys, directly or by interposing an intermediate layer, on the polyester-based resin layer.

Assignees

• Furukawa Electric Co Ltd
• Furukawa Magnet Wire Co Ltd

Inventors

• Obika Ryosuke
• Aoi Tsuneo

Classifications

• H01B3/423

  Linear aromatic polyesters · CPC title

• H01B3/422

  Linear saturated polyesters derived from dicarboxylic acids and dihydroxy compounds · CPC title

• C08G2650/40

  containing ketone groups, e.g. polyarylethylketones, PEEK or PEK · CPC title

• H01B3/421

  Polyesters · CPC title

• H01F5/06

  Insulation of windings · CPC title