# US 2020/0399778 A1 · Insulated conductor and insulated conductor manufacturing method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0399778 A1 - Document ID: US20200399778A1 - Status: Published application - Kind: A1 - Application number: 16/765,015 - Filed: 2018-11-20 - Published: 2020-12-24 - Earliest claimed: 2017-11-21 - Assignees: Mitsubishi Materials Corporation - Applicants: Mitsubishi Materials Corporation - Inventors: Shintaro Iida; Hideaki Sakurai - Web page: https://patentgrep.com/patent/US20200399778A1 ## CPC - C25D 15/00: Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires - C08G 73/14: Polyamide-imides - C08L 79/08: Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors - C09D 5/4473: {Mixture of polymers} - C09D 127/18: Homopolymers or copolymers of tetrafluoroethene - C25D 13/22: Servicing or operating {apparatus or multistep processes} - H01B 3/305: {Polyamides or polyesteramides} - H01B 3/306: {Polyimides or polyesterimides} - H01B 3/445: {from vinylfluorides or other fluoroethylenic compounds} - H01B 7/0216: {Two layers} - H01B 13/0016: {for heat treatment} - H01B 13/06: Insulating conductors or cables (H01B13/32 takes precedence) - H01B 13/30: Drying; Impregnating (H01B13/32 takes precedence) - H01B 7/04: Flexible cables, conductors, or cords, e.g. trailing cables - H01F 5/06: Insulation of windings - C25D: PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract An insulated conductor of the present invention is an insulated conductor having a conductor and an insulating film provided on a surface of the conductor, in which the insulating film has a low-concentration fluorine layer disposed on a surface side of the conductor and a high-concentration fluorine layer disposed on at least a part of an outside surface of the low-concentration fluorine layer, the low-concentration fluorine layer includes a cured product of a thermosetting resin and a fluororesin and has a fluorine atom content relatively lower than that of the high-concentration fluorine layer, and the high-concentration fluorine layer includes a cured product of a thermosetting resin and a fluororesin and has a fluorine atom content relatively higher than that of the low-concentration fluorine layer. ## Claims ### Claim 1 An insulated conductor comprising: a conductor; and an insulating film provided on a surface of the conductor, wherein the insulating film has a low-concentration fluorine layer disposed on a surface side of the conductor and a high-concentration fluorine layer disposed on at least a part of an outside surface of the low-concentration fluorine layer, the low-concentration fluorine layer includes a cured product of a thermosetting resin and a fluororesin and has a fluorine atom content relatively lower than that of the high-concentration fluorine layer, and the high-concentration fluorine layer includes a cured product of a thermosetting resin and a fluororesin and has a fluorine atom content relatively higher than that of the low-concentration fluorine layer. ### Claim 2 (depends on 1) The insulated conductor according to claim 1, wherein the fluororesin included in the low-concentration fluorine layer is a thermoplastic resin, and the fluororesin included in the high-concentration fluorine layer is a thermoplastic resin. ### Claim 3 (depends on 1) The insulated conductor according to claim 1, wherein the low-concentration fluorine 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. ### Claim 4 (depends on 1) The insulated conductor according to claim 1, wherein a difference between a fluorine atom content of the high-concentration fluorine layer and a fluorine atom content in a central region in a thickness direction of the low-concentration fluorine layer is 7 atom % or more. ### Claim 5 (depends on 1) The insulated conductor according to claim 1, wherein the fluorine atom content of the high-concentration fluorine layer is 35 atom % or more. ### Claim 6 (depends on 1) The insulated conductor according to claim 1, wherein the low-concentration fluorine layer and the high-concentration fluorine layer are a continuous phase. ### Claim 7 (depends on 1) The insulated conductor according to claim 1, wherein a thickness of the high-concentration fluorine layer is in a range of 0.5 μm or more and 5 μm or less. ### Claim 8 (depends on 1) 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; a drying step of heating and drying the electrodeposition layer-attached conductor to obtain a dried electrodeposition layer-attached conductor, and a heating step of heating the dried 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.). ### Claim 9 (depends on 8) The insulated conductor manufacturing method according to claim 8, wherein a heating time in the heating step is five minutes or longer.