WO2020241893A1 - 樹脂被覆超電導線、超電導コイルおよびシールドコイル - Google Patents

樹脂被覆超電導線、超電導コイルおよびシールドコイル Download PDF

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WO2020241893A1
WO2020241893A1 PCT/JP2020/021496 JP2020021496W WO2020241893A1 WO 2020241893 A1 WO2020241893 A1 WO 2020241893A1 JP 2020021496 W JP2020021496 W JP 2020021496W WO 2020241893 A1 WO2020241893 A1 WO 2020241893A1
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Prior art keywords
resin
superconducting wire
coated
coated superconducting
wire according
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Ceased
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PCT/JP2020/021496
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English (en)
French (fr)
Japanese (ja)
Inventor
福島　弘之
金　容薫
秀樹 伊井
巧望 佐藤
宏和 坪内
杉本　昌弘
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Furukawa Electric Co Ltd
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Furukawa Electric Co Ltd
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Application filed by Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd
Priority to JP2021521919A priority Critical patent/JP7704676B2/ja
Priority to KR1020217039966A priority patent/KR102847529B1/ko
Priority to EP20815589.5A priority patent/EP3979264A4/en
Priority to US17/615,236 priority patent/US20220230777A1/en
Priority to CN202080040169.3A priority patent/CN113950725B/zh
Publication of WO2020241893A1 publication Critical patent/WO2020241893A1/ja
Anticipated expiration legal-status Critical
Priority to JP2025033274A priority patent/JP2025078729A/ja
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
    • H01B12/02—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by their form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/303—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups H01B3/38 or H01B3/302
    • H01B3/305—Polyamides or polyesteramides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/307—Other macromolecular compounds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0208—Cables with several layers of insulating material
    • H01B7/0216—Two layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment

Definitions

  • the present disclosure relates to resin-coated superconducting wires, superconducting coils and shield coils.
  • NMR nuclear magnetic resonance
  • MRI magnetic resonance imaging
  • a superconducting wire 22 such as an NbTi wire is coated with a stabilized copper 21 called a copper channel, and the periphery thereof is coated with a braid of a resin such as polyester 23.
  • a resin-coated superconducting wire 2 made of copper.
  • the periphery of the superconducting wire 22 is coated with stabilized copper 21 to dissipate heat generated from the superconducting wire 22 to the outside, and the superconducting wire 22 is immersed in, for example, liquid helium for cooling. The temperature rise is suppressed.
  • Patent Document 1 proposes a superconducting wire in which a plurality of superconducting wires are embedded in stabilized copper, a resin is coated around the superconducting wire, and the superconducting wire is further embedded in the stabilized copper. ing.
  • the present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a resin-coated superconducting wire that is lighter, more flexible, and inexpensive than the conventional one.
  • a resin-coated superconducting wire having a matrix resin made of a synthetic resin material and a superconducting wire extending in the matrix resin, and the matrix resin is cut off when viewed in a cross section of the resin-coated superconducting wire.
  • a resin-coated superconducting wire having an area equal to or larger than the cross-sectional area of the superconducting wire.
  • the superconducting wire comprises one or more selected from the group consisting of metal / niobium titanium, metal / niobium tritin, metal / magnesium diboride, rare earth-based and bismuth-based superconducting materials. , The resin-coated superconducting wire according to the above [1].
  • the resin-coated superconducting wire has two layers composed of an inner matrix resin layer in which the matrix resin covers the outer periphery of the superconducting wire and one or more outer matrix resin layers covering the outside of the inner matrix resin layer.
  • the inner matrix resin layer is an olefin resin containing at least one functional group selected from the group consisting of an epoxy group, an oxazolyl group, an amino group and a maleic anhydride residue, or a copolymer thereof.
  • the resin-coated superconducting wire according to the above [10] characterized in that it is present.
  • the resin-coated superconducting wire according to the above [10] wherein the inner matrix resin layer is an olefin-based copolymer containing a metal salt of a carboxylic acid.
  • FIG. 1 is a cross-sectional view of the resin-coated superconducting wire (flat shape) of one embodiment.
  • FIG. 2 is a cross-sectional view of the resin-coated superconducting wire (circular shape) of one embodiment.
  • FIG. 3 is a cross-sectional view of the resin-coated superconducting wire (flat shape) of one embodiment.
  • FIG. 4 is a cross-sectional view of the resin-coated superconducting wire (circular shape) of one embodiment.
  • 5 (a) to 5 (f) are cross-sectional views showing various modified examples of the resin-coated superconducting wire (flat shape), respectively.
  • FIG. 6 is a cross-sectional view of a conventional resin-coated superconducting wire.
  • the present inventors have a resin-coated superconducting wire having a matrix resin made of a synthetic resin material and a superconducting wire extending in the matrix resin, and the matrix resin is cut off when viewed in a cross section of the resin-coated superconducting wire.
  • a resin-coated superconducting wire that is lighter, more flexible, and inexpensive than the conventional one by having an area larger than the cross-sectional area of the superconducting wire, and completed the present disclosure. ..
  • the resin-coated superconducting wire according to the present disclosure includes a matrix resin made of a synthetic resin material and a superconducting wire extending in the matrix resin. Then, in the resin-coated superconducting wire, the cross-sectional area of the matrix resin is equal to or larger than the cross-sectional area of the superconducting wire when viewed in cross section of the resin-coated superconducting wire.
  • FIG. 1 is a cross-sectional view of the resin-coated superconducting wire of one embodiment
  • FIG. 2 is a cross-sectional view of the resin-coated superconducting wire of one embodiment
  • the resin-coated superconducting wire 1 has a matrix resin 11 made of a synthetic resin material and a superconducting wire 12 extending in the matrix resin 11.
  • the cross-sectional area of the matrix resin 11 is equal to or larger than the cross-sectional area of the superconducting wire 12 when viewed in the cross section of the resin-coated superconducting wire 1.
  • FIG. 1 is a resin-coated superconducting wire 1 having a flat cross-sectional shape
  • the resin-coated superconducting wire 1 shown in FIGS. 1 and 2 is a single-layer coated wire in which a matrix resin 11 composed of a single-layer matrix resin layer covers the outer periphery of the superconducting wire 12.
  • the current flowing inside the superconducting wire 12 constituting the resin-coated superconducting wire 1 is relatively small. Therefore, the superconducting wire 12 used for such an application is less likely to cause quenching, and even if it is quenched, the current is small, so that it is not necessary to combine a large amount of stabilized copper.
  • the superconducting wire 12 is extended (preferably embedded) in the matrix resin 11 having the same or larger cross-sectional area in cross section. As a result, in the resin-coated superconducting wire, the matrix resin 11 acts as a so-called spacer, and the adjacent superconducting wires 12, 12 can be arranged at a certain distance from each other.
  • the matrix resin 11 is made of a synthetic resin material.
  • the matrix resin 11 ensures the insulation between the superconducting wires 12 and also serves as a so-called spacer as described above, and arranges the adjacent superconducting wires 12 at a certain distance from each other.
  • the matrix resin is solid and excludes braided yarns.
  • the matrix resin 11 is extruded, which is an effective method for performing thick-wall coating molding so that the cross-sectional area of the matrix resin 11 is equal to or larger than the cross-sectional area of the superconducting wire 12 when viewed from the cross section of the resin-coated superconducting wire 1.
  • a thermoplastic resin that can be molded is preferable, and a polyamide or polyolefin is more preferable.
  • the polyamide is preferably nylon.
  • the above thermoplastic resins include, for example, polyethylene, polypropylene, polystyrene, nylon 11, nylon 12, nylon 6, nylon 66, nylon 610, nylon MXD6 (polycondensate of metaxylylene diamine and adipic acid), polyethylene terephthalate, and poly.
  • Butylene terephthalate, polyethylene naphthalate, polyphenylene sulfide, ethylene tetrafluoride / propylene hexafluoride copolymer resin (FEP), ethylene tetrafluoride / ethylene copolymer resin (ETFE), polycarbonate, polyphenylene ether, polyetherimide, polyether Polyethylene and the like are preferable, and these resins may be a single substance or a mixture of two or more kinds of resins.
  • the synthetic resin material constituting the matrix resin 11 includes not only a synthetic resin but also a resin composition mainly composed of a synthetic resin.
  • the resin composition may contain various additives contained in ordinary resin compositions, such as additives that improve mechanical or chemical durability, such as various fillers and antioxidants.
  • additives that improve mechanical or chemical durability such as various fillers and antioxidants.
  • the heat shrinkage rate of the matrix resin 11 can be made smaller and closer to the heat shrinkage rate of the superconducting wire 12, and the heat cycle property of the resin-coated superconducting wire 1 can be improved. Can be done.
  • the melting point of the matrix resin 11 is preferably, for example, 290 ° C. or lower, more preferably 280 ° C. or lower, and further preferably 270 ° C. or lower.
  • the above crystalline resins constituting the matrix resin 11 include, for example, polyethylene, polypropylene, nylon 11, nylon 12, nylon 6, nylon 66, nylon 610, nylon MXD6, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, and polyphenylene sulfide.
  • Polyethylene tetrafluoride / propylene hexafluoride copolymer resin (FEP), ethylene tetrafluoride / ethylene copolymer resin (ETFE) and the like are suitable.
  • the melting point of the matrix resin 11 is preferably 210 ° C. or lower, more preferably 200 ° C. or lower, and 190 ° C. The following is more preferable.
  • the above-mentioned crystalline resins constituting the matrix resin 11 polyethylene, polypropylene, nylon 11, and nylon 12 are preferable.
  • the matrix resin 11 is preferably nylon or polyolefin, and among them, nylon 11, nylon 12, nylon 6, nylon 66, nylon 610, nylon MXD6, polyethylene, and polypropylene are more preferable, and particularly low melting point and low heat shrinkage. Nylon 11, nylon 12, polyethylene, and polypropylene are more preferable because of their rate, excellent water absorption resistance (low water absorption rate), flexibility, and mechanical properties.
  • the glass transition point of the synthetic resin material constituting the matrix resin 11 is preferably, for example, 250 ° C. or lower, more preferably 240 ° C. or lower, 230 ° C. or lower. It is more preferably ° C. or lower.
  • the glass transition point of the synthetic resin material constituting the matrix resin 11 is preferably, for example, 250 ° C. or lower, more preferably 240 ° C. or lower, 230 ° C. or lower. It is more preferably ° C. or lower.
  • amorphous resin constituting the matrix resin 11 for example, polycarbonate, polyphenylene ether, polyetherimide, polyether sulfone and the like are suitable.
  • FIG. 3 is a cross-sectional view of another example of the resin-coated superconducting wire (flat shape), and FIG. 4 is a cross-sectional view of another example of the resin-coated superconducting wire (circular shape).
  • the resin-coated superconducting wire 1 shown in FIGS. 3 to 4 is a multilayer coated wire in which a matrix resin 11 composed of a multilayer resin layer covers the outer periphery of the superconducting wire 12.
  • the matrix resin 11 is an annular inner matrix resin layer 11a that covers the outer periphery of the superconducting wire 12 and one that covers the inner matrix resin layer 11a from the outside. It is composed of the above outer matrix resin layer 11b.
  • FIGS. 3 to 4 show a two-layer structure in which the matrix resin 11 is composed of an inner matrix resin layer 11a and one outer matrix resin layer 11b.
  • the resin-coated superconducting wire 1 is preferably a multilayer-coated wire having two or more matrix resin layers, such as the inner matrix resin layer 11a and the outer matrix resin layer 11b. It is more preferable that the resin layer is a multilayer coated wire having 2 or more and 4 or less layers.
  • the resin-coated superconducting wire 1 a multilayer-coated wire, it can be expected that the dimensional accuracy of the extrusion-coated wire can be improved by reducing the amount of resin at the time of one-time extrusion coating. Further, by using a different resin for each matrix resin layer, the functionality of the resin-coated superconducting wire 1 can be further enhanced.
  • the inner matrix resin layer 11a which is the first layer on the conductor side, has an epoxy group, an oxazolyl group, an amino group and a maleic anhydride residue.
  • an olefin resin containing at least one functional group selected from the group consisting of groups, or a multilayer coated wire which is a copolymer thereof (also referred to as a copolymer (A)) the superconducting wire 12 and Adhesion with the outer polyolefin resin 11b can be improved.
  • the adhesion is improved in the same manner as described above by forming the inner matrix resin layer 11a into a multilayer coated wire which is an olefin-based copolymer (also referred to as an olefin-based copolymer (B)) containing a metal salt of a carboxylic acid. Can be expected.
  • an olefin-based copolymer also referred to as an olefin-based copolymer (B)
  • B olefin-based copolymer
  • the olefin components constituting the copolymer (A) include ethylene, propylene, butene-1, pentene-1,4-methylpentene-1, isobutylene, hexene-1, decene-1, octene-1, 1,4. -Hexadiene, dicyclopentadiene and the like are preferable, and among them, ethylene, propylene and butene-1 are preferable. Further, these components may be used alone or in combination of two or more.
  • the copolymer component other than the olefin constituting the copolymer (A) may be at least one of an acrylic component and a vinyl component.
  • Acrylic acid components include acrylic acid, methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, t-butyl acrylate, isobutyl acrylate, methyl methacrylate, ethyl methacrylate, Butyl methacrylate and the like are suitable.
  • vinyl component vinyl acetate, vinyl propionate, vinyl butyrate, vinyl chloride, vinyl alcohol, styrene and the like are suitable. Of these, methyl acrylate and methyl methacrylate are more preferable. Further, these components may be used alone or in combination of two or more.
  • Typical preferred examples of the copolymer (A) include polyethylene or polypropylene grafted with maleic anhydride, an ethylene / glycidyl methacrylate copolymer, and the like, and examples of the city plate resin include Admer ( There are Mitsui Chemical Co., Ltd., product name), Bond First (Sumitomo Chemical Industry Co., Ltd., product name), and Rotada (Atofina Co., Ltd., product name).
  • the carboxylic acid constituting the olefin copolymer (B) is preferably an unsaturated monocarboxylic acid such as acrylic acid, methacrylic acid or crotonic acid, or a non-carboxylic acid such as maleic acid, fumaric acid or phthalic acid.
  • unsaturated monocarboxylic acids such as acrylic acid, methacrylic acid or crotonic acid
  • non-carboxylic acid such as maleic acid, fumaric acid or phthalic acid.
  • Saturated dicarboxylic acids can be mentioned, and examples of these metal salts include salts of Zn, Na, K, Mg and the like.
  • an olefin-based copolymer (B) preferably, a part of the carboxylic acid of the ethylene-methacrylic acid copolymer is made into a metal salt, and a resin generally called an ionomer (for example, Hymilan; trade name, Mitsui) (Made by Polychemical Co., Ltd.) can be mentioned.
  • an ionomer for example, Hymilan; trade name, Mitsui
  • the heat shrinkage rate calculated by the following method is preferably 5% or less, more preferably 2% or less, and further preferably 1% or less.
  • Heat shrinkage rate (%) ⁇ (Dimensions of resin-coated superconducting wire before immersion-Dimensions of resin-coated superconducting wire after immersion) / Dimensions of resin-coated superconducting wire before immersion ⁇ ⁇ 100 ⁇ ⁇ ⁇ Equation (1)
  • the water absorption rate calculated by the following method is more preferably 1.0% or less, and further preferably 0.7% or less.
  • the lower the water absorption rate the smaller the expansion of the surface of the matrix resin 11. Therefore, it is possible to suppress damage or deterioration of the matrix resin 11 due to water absorption, deterioration of the matrix resin 11 due to water absorption, or deterioration of mechanical strength due to generation of cracks.
  • the calculation method shown below is one of the methods for obtaining the water absorption rate of plastic specified in JIS K7209.
  • the superconducting wire 12 is a wire rod extending in the matrix resin 11 described above, and has superconducting property.
  • the size of the cross section of the superconducting wire 12 is preferably 0.05 to 2.00 mm ⁇ , more preferably 0.07 to 1.50 mm ⁇ , and 0.1 to 1 for a circular shape, for example. If the cross section of the superconducting wire 12 is a flat shape, the long side thereof is preferably 0.8 mm to 2.5 mm, more preferably 1.5 mm to 2.0 mm. The short side is preferably 0.5 mm to 1.5 mm, and more preferably 0.9 mm to 1.2 mm.
  • the superconducting wire 12 is composed of one or more superconducting materials selected from the group consisting of, for example, metal / niobium titanium, metal / niobium tritin, metal / magnesium diboride, rare earth-based and bismuth-based superconducting materials. Is preferable.
  • metal / niobium titanium metal / niobium tritin
  • metal / magnesium diboride rare earth-based and bismuth-based superconducting materials.
  • metal / niobium titanium metal / niobium tritin
  • metal / magnesium diboride means that a metal such as copper or iron is coated around niobium titanium, niobium tritin or magnesium diboride. It is a composite.
  • rare earth material examples include YBa 2 Cu 3 O 7- ⁇ and GdBa 2 Cu 3 O 7- ⁇ .
  • bismuth-based material examples include Bi 2 Sr 2 Ca 2 Cu 3 O 10 + ⁇ and Bi 2 Sr 2 CaCu 2 O 8 + ⁇ .
  • the superconducting wire 12 either a single wire or a stranded wire obtained by twisting a plurality of strands can be used.
  • the cross-sectional area of the matrix resin 11 is equal to or larger than the cross-sectional area of the superconducting wire 12 when viewed in cross section.
  • the ratio of the cross-sectional area of the matrix resin 11 to the cross-sectional area of the superconducting wire 12 is doubled. It is preferably 5 times or more, more preferably 5 times or more, further preferably 10 times or more, particularly preferably 20 times or more, and most preferably 40 times or more.
  • the upper limit of the cross-sectional area ratio is preferably 1000 times, for example, from the practical viewpoints such as suitability as a coil material and handleability of winding work.
  • the superconducting wire 12 is located at the center (center of gravity) of the matrix resin 11 in FIGS. 1 and 2, but the resin-coated superconducting wire 12 is shown. As long as it is not exposed from the surface of the wire 1 (as long as even a small amount of the resin component of the matrix resin 11 is present on the surface of the resin-coated superconducting wire), it may be present at any position in the matrix resin 11. For example, FIGS.
  • 5A to 5F show cross sections of resin-coated superconducting wires 1A to 1F having a flat cross-sectional shape, in which superconducting wires 12A to 12F are arranged at different cross-sectional positions of the matrix resins 11A to 11F, respectively.
  • This is a modified example of.
  • one superconducting wire 12 is arranged as a single wire or a stranded wire with respect to one matrix resin 11.
  • the resin-coated superconducting wire may have any shape such as a circular shape including an elliptical shape, a triangular shape, a square shape, and a flat shape, but the resin-coated superconducting wire should have a flat shape due to the ease of coil formation. Is preferable.
  • the cross-sectional shape of the resin-coated superconducting wire is a flat shape
  • the cross-sectional shape of the resin-coated superconducting wire includes those having an R value of 1 mm or less at the corners.
  • the long side of the cross section of the resin-coated superconducting wire is preferably, for example, 0.5 mm to 10 mm, and more preferably 1 mm to 7 mm.
  • the short side of the cross section of the resin-coated superconducting wire is preferably, for example, 0.1 mm to 5 mm, and more preferably 0.5 mm to 3 mm.
  • the dimensional accuracy of the width and thickness of the resin-coated superconducting wire is preferably ⁇ 0.10 mm or less, and preferably ⁇ 0.05 mm or less.
  • the "dimensional accuracy” refers to the range of the difference between the maximum value and the minimum value of the dimensions of one resin-coated superconducting wire.
  • the resin-coated superconducting wire can realize higher electromagnetic shielding performance.
  • a method of scraping the outer surface after resin extrusion processing can be mentioned.
  • a method of coating the surface of the above-mentioned matrix resin with, for example, a UV curable resin material can also be mentioned.
  • the resin-coated superconducting wire as described above can be applied to a superconducting coil, particularly a shield coil used in an NMR device, an MRI inspection device, or the like.
  • the voltage that can be applied to the resin-coated superconducting wire as described above is not particularly limited, but is, for example, preferably 0 to 50 V, more preferably 0 to 20 V, and even more preferably 0 to 10 V. ..
  • the resin-coated superconducting wire is lighter and cheaper than the conventional superconducting wire provided with stabilized copper, and further, it is less prone to bending habits, has improved flexibility, and has flexibility such as flexibility. It is also excellent in handling, so it is easy to wind when coiling.
  • the resin-coated superconducting wire according to the above embodiment is, for example, a method for manufacturing an extruded body of a normal resin material by inserting the superconducting wire into a synthetic resin raw material constituting a matrix resin. Similarly, it can be manufactured by extrusion molding. The heating temperature, extrusion speed, and the like may be appropriately adjusted depending on the type of synthetic resin raw material, the size and shape of the molded product to be molded, and the like.
  • a superconducting wire which is a wire
  • resin in advance and then embedded in a copper channel in a two-step process.
  • the resin-coated superconducting wire of the embodiment since the matrix resin can form the same shape as the copper channel, the conventional two-step process can be completed in one step.
  • Nylon 11 (ARKEMA, BESN Noir TL), Nylon 12 (Ube Kosan, UBESTA3030LUX), Nylon 6 (Ube Kosan, UBESTA1024JI), Nylon 66 (Asahi Kasei, Leona (registered trademark) 1300S) as raw materials for synthetic resin materials , High-density polyethylene (Asahi Kasei, Suntech (registered trademark) -HD B891) was used, and a 0.3 mm ⁇ copper / nylon superconducting wire was inserted into the raw material of the synthetic resin material to form a flat shape (Examples 1 to 20).
  • Examples 21 to 40 Or round shape (Examples 21 to 40) and extruded under temperature conditions of melting point + 20 ° C or higher and melting point + 80 ° C or lower of each resin material using a mold having the dimensions shown in Tables 2 and 3 below. ..
  • the superconducting wire was arranged so as to be the center of the synthetic resin material.
  • resin-coated superconducting wires having a flat cross-sectional shape were manufactured.
  • Examples 21 to 40 resin-coated superconducting wires having a circular cross-sectional shape were manufactured.
  • High-density polyethylene (Asahi Kasei, Suntech (registered trademark) -HD B891) is used as a raw material for synthetic resin materials, and modified low-density polyethylene (Mitsui Chemicals, Admer NB508) graft-copolymerized with maleic anhydride is 20 ⁇ m thick.
  • Insert the 0.3 mm ⁇ copper / niobium titanium superconducting wire coated with the above into the raw material of the synthetic resin material and use a mold that is flat and has the dimensions shown in Table 4 below, and the melting point of each resin material is +20. Extrusion was performed under temperature conditions of ° C. or higher and melting point + 80 ° C. or lower. As shown in FIG. 3, the superconducting wire was arranged so as to be the center of the synthetic resin material.
  • Example 42 Example 41 except that a 0.3 mm ⁇ copper / niobium-titanium superconducting wire coated with an ethylene-methacrylic acid copolymer (manufactured by Mitsui Polychemical Co., Ltd., Hymilan 1855) in which a part of the carboxylic acid is a metal salt and coated with a thickness of 20 ⁇ m was used.
  • a resin-coated superconducting wire was obtained in the same manner as above.
  • High-density polyethylene (Asahi Kasei, Suntech (registered trademark) -HD B891) is used as a raw material for synthetic resin materials, and modified low-density polyethylene (Mitsui Chemicals, Admer NB508) graft-copolymerized with maleic anhydride is 20 ⁇ m thick.
  • the cross-sectional area of the matrix resin was calculated from the cross-sectional area of the resin-coated superconducting wire, the outer cross-sectional area of the resin-coated superconducting wire, and the difference between the cross-sectional area and the superconducting wire. From the cross-sectional area of this matrix resin, the mass and cost of the resin per 1000 m in length of the resin-coated superconducting wire, and their copper equivalent values were calculated. The results are shown in Tables 2 to 5 below. In Tables 2 to 5, the amount in parentheses indicates the amount of copper converted in the same volume.
  • Table 1 shows the melting point, glass transition point, heat shrinkage rate, and water absorption rate of each of the synthetic resin materials used in Examples 1 to 43.
  • the heat shrinkage rate and the water absorption rate were determined by the above-mentioned method.
  • the resin-coated superconducting wires of Examples 1 to 43 were obtained with the same dimensions as the superconducting wire using the conventional copper channel, and thereby achieved the same magnetic shielding characteristics as the superconducting wire using the conventional copper channel. It was confirmed that it could be done.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
PCT/JP2020/021496 2019-05-31 2020-05-29 樹脂被覆超電導線、超電導コイルおよびシールドコイル Ceased WO2020241893A1 (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2021521919A JP7704676B2 (ja) 2019-05-31 2020-05-29 樹脂被覆超電導線、超電導コイルおよびシールドコイル
KR1020217039966A KR102847529B1 (ko) 2019-05-31 2020-05-29 수지 피복 초전도선, 초전도 코일 및 실드 코일
EP20815589.5A EP3979264A4 (en) 2019-05-31 2020-05-29 Resin-coated superconducting wire, superconducting coil, and shield coil
US17/615,236 US20220230777A1 (en) 2019-05-31 2020-05-29 Resin coated superconducting wire, superconducting coil, and shield coil
CN202080040169.3A CN113950725B (zh) 2019-05-31 2020-05-29 树脂被覆超导线、超导线圈及屏蔽线圈
JP2025033274A JP2025078729A (ja) 2019-05-31 2025-03-03 樹脂被覆超電導線、超電導コイルおよびシールドコイル

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CN113950725B (zh) 2026-01-27
JP2025078729A (ja) 2025-05-20
KR20220008296A (ko) 2022-01-20
US20220230777A1 (en) 2022-07-21
EP3979264A1 (en) 2022-04-06
JPWO2020241893A1 (https=) 2020-12-03
JP7704676B2 (ja) 2025-07-08
CN113950725A (zh) 2022-01-18
KR102847529B1 (ko) 2025-08-18
EP3979264A4 (en) 2023-05-31

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