Patents by Inventor Shuta Nabeshima
Shuta Nabeshima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10546667Abstract: An insulated wire includes a conductor and an insulating layer formed on an outer periphery of the conductor, and the insulating layer is composed essentially of a polyimide resin having a repeating unit A represented by Formula (1) as a part of a molecular structure, in which a water absorption coefficient is not greater than 2.8% after 24 hours under condition at temperature of 40° C. and humidity of 95%.Type: GrantFiled: October 15, 2013Date of Patent: January 28, 2020Assignee: HITACHI METALS, LTD.Inventors: Takami Ushiwata, Yuki Honda, Shuta Nabeshima, Hideyuki Kikuchi
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Patent number: 10199137Abstract: An insulated wire includes a conductor, and a polyimide insulation layer formed on an outer periphery of the conductor. The insulation layer includes a polyimide including a repeating unit represented by formula (1) and a repeating unit represented by formula (2). A first acid component in the repeating unit represented by the formula (1) and a second acid component in the repeating unit represented by the formula (2) are mixed in a molar ratio range of 85:15 to 40:60 as expressed by a molar ratio (the first acid component:the second acid component). R as a residue of a diamine component in the formulas (1) and (2) includes a residue of 4,4?-diaminodiphenyl ether and a residue of one selected from a group of diamines represented by the formulas (3) to (8). A storage elastic modulus of the polyimide at 325° C. is not less than 50 MPa.Type: GrantFiled: August 28, 2013Date of Patent: February 5, 2019Assignee: Hitachi Metals, Ltd.Inventors: Takami Ushiwata, Yuki Honda, Shuta Nabeshima, Hideyuki Kikuchi
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Patent number: 9843233Abstract: An insulated electric wire includes a rectangular conductor and an insulation film disposed on the periphery of the rectangular conductor. The insulation film is characterized by: the provision of a resin containing an imide structure within a molecule; and a peak value of less than 1.0 for the loss tangent tan ?, which is represented by the ratio between the loss elastic modulus and the storage elastic modulus, as measured in the 50 DEG C. to 400 DEG C. range.Type: GrantFiled: June 27, 2014Date of Patent: December 12, 2017Assignee: HITACHI METALS, LTD.Inventors: Shuta Nabeshima, Yuki Honda, Hideyuki Kikuchi
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Publication number: 20160380499Abstract: An insulated electric wire includes a rectangular conductor and an insulation film disposed on the periphery of the rectangular conductor. The insulation film is characterized by: the provision of a resin containing an imide structure within a molecule; and a peak value of less than 1.0 for the loss tangent tan ?, which is represented by the ratio between the loss elastic modulus and the storage elastic modulus, as measured in the 50 DEG C. to 400 DEG C. range.Type: ApplicationFiled: June 27, 2014Publication date: December 29, 2016Applicant: Hitachi Mentals, Ltd.Inventors: Shuta NABESHIMA, Yuki HONDA, Hideyuki KIKUCHI
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Patent number: 9484124Abstract: An insulated electric wire includes a conductor and an insulating coating provided around a perimeter of the conductor. The insulating coating includes a first insulating coating film around the perimeter of the conductor, the first insulating coating film being formed of a resin containing an imide structure in its molecule, and a second insulating coating film around a perimeter of the first insulating coating film, the second insulating coating film being formed of a polyimide resin comprising a repeat unit represented by Formula 1, and having an imide concentration of not less than 15% and not more than 36%, wherein R1 is a tetravalent group derived from decarboxylation of an aromatic tetracarboxylic acid, and R2 is a divalent group derived from deamination of an aromatic diamine.Type: GrantFiled: March 28, 2012Date of Patent: November 1, 2016Assignee: HITACHI METALS, LTD.Inventors: Yuki Honda, Shuta Nabeshima, Takami Ushiwata, Tomiya Abe, Hideyuki Kikuchi
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Patent number: 9343197Abstract: An insulated wire includes a conductor, and an insulating covering layer including a first insulation layer formed around the conductor and a second insulation layer formed around the first insulation layer. An elastic modulus of the second insulation layer at 300° C. is not less than 300 MPa, and a relative permittivity of the insulating covering layer is not more than 3.0.Type: GrantFiled: November 29, 2012Date of Patent: May 17, 2016Assignee: HITACHI METALS, LTD.Inventors: Yuki Honda, Takami Ushiwata, Shuta Nabeshima, Hideyuki Kikuchi
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Publication number: 20150279510Abstract: A winding wire includes a conductor and a partial-discharge-resistant coating layer on the conductor. The partial-discharge-resistant coating layer contains a base resin, electrically insulating fine inorganic particles present in the base resin, and fine conductive particles present in the base resin in an amount of 1.25 to 3.00 parts by weight based on 100 parts by weight of the base resin.Type: ApplicationFiled: March 6, 2015Publication date: October 1, 2015Inventors: Hidehito Hanawa, Shuta Nabeshima
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Patent number: 8986834Abstract: A insulated wire includes a conductor, and an insulating coating on a periphery of the conductor. The insulating coating includes an insulating film formed by applying and baking a polyester imide resin insulating coating material, and the insulating film has a relative permittivity of less than 3.5 both in a dried state and in a moisture-absorbed state. The insulating film is formed by applying and baking a polyester imide resin insulating coating material including an imide dicarboxylic acid and an alcohol component, the imide dicarboxylic acid being obtained by synthesizing a diamine component including aromatic diamine having not less than three aromatic rings and an acid component including aromatic tricarboxylic acid anhydride.Type: GrantFiled: August 5, 2011Date of Patent: March 24, 2015Assignee: Hitachi Metals, Ltd.Inventors: Hideyuki Kikuchi, Yasuhiro Funayama, Hidehito Hanawa, Yuki Honda, Takami Ushiwata, Shuta Nabeshima
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Publication number: 20140212665Abstract: A polyamide-imide coating material includes a polyamide-imide resin including a repeating unit of a chemical structure represented by the following general formula (1) in a molecular chain, and a solvent for dissolving the polyamide-imide resin R1: monovalent organic group R2: divalent organic group R3: trivalent organic group.Type: ApplicationFiled: January 24, 2014Publication date: July 31, 2014Applicant: Hitachi Metals, Ltd.Inventors: Takami USHIWATA, Shuta NABESHIMA, Yasuhiro FUNAYAMA, Yuki HONDA, Hideyuki KIKUCHI
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Publication number: 20140102752Abstract: An insulated wire includes a conductor and an insulating layer formed on an outer periphery of the conductor, and the insulating layer is composed essentially of a polyimide resin having a repeating unit A represented by Formula (1) as a part of a molecular structure, in which a water absorption coefficient is not greater than 2.8% after 24 hours under condition at temperature of 40° C.Type: ApplicationFiled: October 15, 2013Publication date: April 17, 2014Applicant: HITACHI METALS, LTD.Inventors: Takami USHIWATA, Yuki HONDA, Shuta NABESHIMA, Hideyuki KIKUCHI
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Publication number: 20140065421Abstract: An insulated wire includes a conductor, and a polyimide insulation layer formed on an outer periphery of the conductor. The insulation layer includes a polyimide including a repeating unit represented by formula (1) and a repeating unit represented by formula (2). A first acid component in the repeating unit represented by the formula (1) and a second acid component in the repeating unit represented by the formula (2) are mixed in a molar ratio range of 85:15 to 40:60 as expressed by a molar ratio (the first acid component:the second acid component). R as a residue of a diamine component in the formulas (1) and (2) includes a residue of 4,4?-diaminodiphenyl ether and a residue of one selected from a group of diamines represented by the formulas (3) to (8). A storage elastic modulus of the polyimide at 325° C. is not less than 50 MPa.Type: ApplicationFiled: August 28, 2013Publication date: March 6, 2014Inventors: Takami USHIWATA, Yuki HONDA, Shuta NABESHIMA, Hideyuki KIKUCHI
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Publication number: 20140065418Abstract: An insulated wire including conductor, and a first resin layer formed on an outer periphery of the conductor, wherein the first resin layer includes an insulating resin including inorganic fine particles and an unreacted organic metal. An insulated wire including a conductor, a second resin layer formed on an outer periphery of the conductor and including an insulating resin that contains inorganic fine particles, and a third resin layer formed under the second resin layer and including an unreacted organic metal.Type: ApplicationFiled: August 30, 2013Publication date: March 6, 2014Applicant: Hitachi Metals, Ltd.Inventors: Hideyuki KIKUCHI, Hidehito HANAWA, Shuta NABESHIMA, Yuki HONDA, Masashi ARAI
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Patent number: 8642179Abstract: An insulating varnish includes a polyamide-imide resin including a repeat unit represented by Formula (1) below derived from a synthesis reaction between a resin component (X) and a diisocyanate component (Y). The resin component (X) is derived from a synthesis reaction between a diamine component including aromatic diamines including g a divalent aromatic group (R) including three or more aromatic rings, and an acid component in the presence of an azeotrope solvent. The diisocyanate component (Y) includes a 2,4?-diphenylmethane diisocyanate (Y1) and a 4,4?-diphenylmethane diisocyanate (Y2). In Formula (1), R denotes the divalent aromatic group including three or more aromatic rings, and m and n denote an integer of from 1 to 99.Type: GrantFiled: February 15, 2011Date of Patent: February 4, 2014Assignee: Hitachi Cable, Ltd.Inventors: Shuta Nabeshima, Yuki Honda, Tomiya Abe, Hideyuki Kikuchi, Yasuhiro Funayama
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Publication number: 20130330552Abstract: An insulated wire includes a conductor, and an insulating coating provided around the conductor, and including a polyamide imide layer comprising a polyamide imide consisting essentially of a structural unit represented by Formula (1) below, and Ar in Formula (1) mainly containing an aromatic group represented by Formula (2) below.Type: ApplicationFiled: June 6, 2013Publication date: December 12, 2013Inventors: Yuki HONDA, Takami USHIWATA, Shuta NABESHIMA, Hideyuki KIKUCHI
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Publication number: 20130240244Abstract: An insulated wire includes a flat type conductor, and an insulating film on an outer periphery of the flat type conductor. The insulating film includes a polyimide layer including a polyimide and having a breaking elongation percentage of more than 80%.Type: ApplicationFiled: December 4, 2012Publication date: September 19, 2013Applicant: Hitachi Cable, Ltd.Inventors: Yuki HONDA, Takami USHIWATA, Shuta NABESHIMA, Hideyuki KIKUCHI
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Publication number: 20130032374Abstract: A polyamide-imide resin insulating varnish includes an amic acid-containing amide compound including a repeating unit represented by a general formula (1): where X is a divalent organic group, and R1 is a divalent organic group derived from a diamine.Type: ApplicationFiled: August 1, 2012Publication date: February 7, 2013Applicant: HITACHI CABLE, LTD.Inventors: Takami USHIWATA, Yuki HONDA, Shuta NABESHIMA, Hideyuki KIKUCHI
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Publication number: 20130000951Abstract: An insulated electric wire includes a conductor and an insulating coating provided around a perimeter of the conductor. The insulating coating includes a first insulating coating film around the perimeter of the conductor, the first insulating coating film being formed of a resin containing an imide structure in its molecule, and a second insulating coating film around a perimeter of the first insulating coating film, the second insulating coating film being formed of a polyimide resin comprising a repeat unit represented by Formula 1, and having an imide concentration of not less than 15% and not more than 36%, wherein R1 is a tetravalent group derived from decarboxylation of an aromatic tetracarboxylic acid, and R2 is a divalent group derived from deamination of an aromatic diamine.Type: ApplicationFiled: March 28, 2012Publication date: January 3, 2013Applicant: Hitachi Cable, Ltd.Inventors: Yuki HONDA, Shuta Nabeshima, Takami Ushiwata, Tomiya Abe, Hideyuki Kikuchi
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Publication number: 20120318555Abstract: A polyamide-imide resin insulating coating material includes an polyamic acid having a thermally crosslinkable reactive group, and an amide compound having a thermally crosslinkable reactive group. The polyamic acid includes an acid synthesized using at least a diamine component, a tetracarboxylic dianhydride and a cross-linking agent as raw materials. The cross-linking agent includes an amino group or an anhydride group and a thermally crosslinkable reactive group. The amide compound includes a compound synthesized using at least a carboxylic acid compound and a diisocyanate component as raw materials. The carboxylic acid compound includes a thermally crosslinkable reactive group that is crosslinkable with the cross-linking agent contained in the polyamic acid.Type: ApplicationFiled: June 18, 2012Publication date: December 20, 2012Applicant: Hitachi Cable, Ltd.Inventors: Takami USHIWATA, Yuki Honda, Shuta Nabeshima, Hideyuki Kikuchi
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Publication number: 20120222884Abstract: It is an objective of the present invention to provide an insulated wire having partial discharge resistance comparable to or higher than those of conventional insulated wires even in unstable operating environments. There is provided an insulated wire including: a wire conductor; a first insulation coating formed around the wire conductor, the first insulation coating including inorganic fine particles dispersed therein; and a second insulation coating formed between the first insulation coating and the wire conductor, a relative dielectric constant of the second insulation coating being lower than that of the first insulation coating.Type: ApplicationFiled: March 2, 2012Publication date: September 6, 2012Inventors: Yuki HONDA, Tomiya Abe, Shuta Nabeshima, Hideyuki Kikuchi
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Publication number: 20120211258Abstract: A polyamide-imide resin insulating coating material includes a polyamide-imide resin produced by reacting an aromatic diisocyanate component with a composition obtained by a synthesis reaction of a diamine component with an acid component that includes an aromatic tricarboxylic acid anhydride component (A) and an aromatic tetracarboxylic dianhydride component (B). The aromatic tetracarboxylic dianhydride component (B) includes an aromatic tetracarboxylic dianhydride component (B-1) having not less than four aromatic rings.Type: ApplicationFiled: January 19, 2012Publication date: August 23, 2012Applicant: HITACHI CABLE, LTD.Inventors: Shuta NABESHIMA, Yuki HONDA, Takami USHIWATA, Tomiya ABE, Hideyuki KIKUCHI