Foamed electrical wire and a method of producing the same
US-9142334-B2 · Sep 22, 2015 · US
Insulated wire, electrical equipment, and method of producing insulated wire
US9728296B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9728296-B2 |
| Application number | US-201514700596-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 30, 2015 |
| Priority date | Dec 28, 2012 |
| Publication date | Aug 8, 2017 |
| Grant date | Aug 8, 2017 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
An insulated wire having a conductor, a foamed insulating layer containing a thermosetting resin having cells, coated directly or indirectly onto the outer periphery of the conductor and an outer insulating layer containing a thermoplastic resin having a melting point of 240° C. or higher when the thermoplastic resin is a crystalline resin or a thermoplastic resin having a glass transition temperature of 240° C. or higher when the thermoplastic resin is a non-crystalline resin; electrical equipment using the insulated wire; and a method of producing the insulated wire, containing a step of forming a foamed insulating layer by applying a varnish for forming the foamed insulating layer on the outer periphery of a conductor, by generating foams during baking and a step of forming an outer insulating layer by extrusion-molding a thermoplastic resin composition for forming the outer insulating layer on the outer periphery of the foamed insulating layer.
First claim
Opening claim text (preview).
The invention claimed is: 1. An insulated wire comprising: a conductor; a foamed insulating layer containing a thermosetting resin having cells, coated directly or indirectly onto the outer periphery of the conductor; and an outer insulating layer containing a thermoplastic resin having a melting point of 240° C. or higher in the case where the thermoplastic resin is a crystalline resin or a thermoplastic resin having a glass transition temperature of 240° C. or higher in the case where the thermoplastic resin is a non-crystalline resin, on the outer side of the foamed insulating layer. 2. The insulated wire according to claim 1 , wherein the thermoplastic resin has a storage elastic modulus of 1 GPa or more at 25° C. 3. The insulated wire according to claim 1 , wherein a thickness ratio of the foamed insulating layer to the outer insulating layer (foamed insulating layer/outer insulating layer) is from 5/95 to 95/5. 4. The insulated wire according to claim 1 , wherein the thermoplastic resin comprises a crystalline thermoplastic resin having a melting point of 270° C. or higher. 5. The insulated wire according to claim 1 , used for a motor coil. 6. A method of producing the insulated wire according to claim 1 , comprising the steps of: forming a foamed insulating layer by applying directly or indirectly a varnish for forming the foamed insulating layer on the outer periphery of a conductor, and by generating foams in the process of baking; and forming an outer insulating layer by extrusion-molding a thermoplastic resin composition for forming the outer insulating layer on the outer periphery of the foamed insulating layer. 7. Electrical equipment, using the insulated wire according to claim 1 .
Assignees
Inventors
Classifications
of cellular material · CPC title
Insulation of windings · CPC title
by extrusion {(extrusion in general B29C48/00)} · CPC title
Insulating conductors with lacquers or enamels · CPC title
- H01B3/30Primary
plastics; resins; waxes · CPC title
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Frequently asked questions
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- What does patent US9728296B2 cover?
- An insulated wire having a conductor, a foamed insulating layer containing a thermosetting resin having cells, coated directly or indirectly onto the outer periphery of the conductor and an outer insulating layer containing a thermoplastic resin having a melting point of 240° C. or higher when the thermoplastic resin is a crystalline resin or a thermoplastic resin having a glass transition temp…
- Who is the assignee on this patent?
- Furukawa Electric Co Ltd, Furukawa Magnet Wire Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01B3/30. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 08 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).