WO2022190851A1 - Fil électrique pour communication - Google Patents

Fil électrique pour communication Download PDF

Info

Publication number
WO2022190851A1
WO2022190851A1 PCT/JP2022/007150 JP2022007150W WO2022190851A1 WO 2022190851 A1 WO2022190851 A1 WO 2022190851A1 JP 2022007150 W JP2022007150 W JP 2022007150W WO 2022190851 A1 WO2022190851 A1 WO 2022190851A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheath layer
magnetic
magnetic sheath
layer
mass
Prior art date
Application number
PCT/JP2022/007150
Other languages
English (en)
Japanese (ja)
Inventor
悠太 安好
Original Assignee
株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社オートネットワーク技術研究所, 住友電装株式会社, 住友電気工業株式会社 filed Critical 株式会社オートネットワーク技術研究所
Publication of WO2022190851A1 publication Critical patent/WO2022190851A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor

Definitions

  • This disclosure relates to communication wires.
  • communication wires used in fields such as automobiles are provided with a shield layer on the outside of the core wire for the purpose of reducing the intrusion of noise from the outside and the emission of noise to the outside.
  • a shield layer is a sheath layer that covers the outer periphery of a core wire using a material in which a powdery magnetic material is dispersed in an organic polymer.
  • a communication wire provided with a sheath layer containing such a magnetic material is disclosed in Patent Documents 1 and 2, for example.
  • the magnetic sheath layer When a magnetic sheath layer in which magnetic material powder is dispersed in an organic polymer is arranged around the outer circumference of a communication wire, the magnetic sheath layer must contain a sufficient amount of magnetic material in order to obtain sufficiently high noise shielding performance. must be included. However, if the magnetic sheath layer contains a large amount of magnetic material, the mass of the magnetic sheath layer and the mass of the communication wire as a whole increase. When a communication wire is mounted on an automobile, it is preferable to keep the mass of the communication wire small.
  • the magnetic sheath layer thin. If the concentration of the magnetic material in the magnetic sheath layer is sufficiently high, a sufficiently high noise shielding property should be obtained even if the magnetic sheath layer is made thin. However, when the magnetic material is contained in the magnetic sheath layer at a high concentration, the extrusion moldability of the magnetic sheath layer deteriorates. more likely to occur. These defects can cause deterioration of the noise shielding performance of the magnetic sheath layer.
  • a communication wire includes a conductor, an insulating layer covering the outer circumference of the conductor, and a magnetic sheath layer covering the outside of the insulating layer, the magnetic sheath layer comprising an organic polymer, and a powdery magnetic material, the content of the magnetic material in the magnetic sheath layer is 350 parts by mass or more and 850 parts by mass or less with respect to 100 parts by mass of the organic polymer, and the magnetic sheath
  • the composition constituting the layer has a melt flow rate of 11.8 g/10 minutes or more measured at 230° C. with a load of 2.16 kg.
  • a communication wire according to the present disclosure is a communication wire in which defects are less likely to occur in the magnetic sheath layer even if the magnetic sheath layer containing the powdered magnetic material is formed thin.
  • FIG. 1 is a cross-sectional view showing the configuration of a communication wire according to one embodiment of the present disclosure.
  • a communication wire according to the present disclosure includes a conductor, an insulating layer covering the outer circumference of the conductor, and a magnetic sheath layer covering the outside of the insulating layer, the magnetic sheath layer comprising an organic polymer, and a powdery magnetic material, the content of the magnetic material in the magnetic sheath layer is 350 parts by mass or more and 850 parts by mass or less with respect to 100 parts by mass of the organic polymer, and the magnetic sheath
  • the composition constituting the layer has a melt flow rate of 11.8 g/10 minutes or more measured at 230° C. with a load of 2.16 kg.
  • the magnetic sheath layer contains a large amount of magnetic material, 350 parts by mass or more and 850 parts by mass or less, with respect to 100 parts by mass of the organic polymer.
  • the composition constituting the magnetic sheath layer has a high melt flow rate of 11.8 g/10 minutes or more, it exhibits high extrusion moldability. Therefore, when forming the magnetic sheath layer by extrusion molding, even if the thickness of the magnetic sheath layer is reduced, the magnetic sheath layer can be obtained with few defects such as holes.
  • a magnetic sheath layer that is small in thickness, contains a large amount of magnetic material, and has few defects, it is possible to achieve both noise shielding performance and lightness in a communication wire.
  • the composition constituting the magnetic sheath layer preferably has a melt flow rate of 23.9 g/10 minutes or less measured under a load of 2.16 kg at 230°C.
  • the magnetic sheath layer has high low-temperature shock resistance, and the electric wire for communication can be suitably used even in places where there is a possibility of being exposed to low temperatures, such as in automobiles.
  • the thickness of the magnetic sheath layer is preferably 0.12 mm or more and 0.16 mm or less. As a result, the electric wire for communication is excellent in both noise shielding performance and lightness.
  • the mass per unit length of the magnetic sheath layer is preferably 3 g/m or less. Then, it is possible to effectively reduce the weight of the communication wire.
  • the communication wire may be configured as a coaxial wire having a metal shield layer on the outer periphery of the insulating layer, and the magnetic sheath layer may be provided on the outer periphery of the metal shield layer.
  • a communication wire configured as a coaxial wire is susceptible to noise, but by providing the magnetic sheath layer, the influence of noise can be reduced.
  • By using the above composition for the magnetic sheath layer it is possible to achieve both sufficient noise shielding performance and thinning of the magnetic sheath layer by suppressing the generation of defects.
  • Providing the metal shield layer tends to increase the mass of the communication wire as a whole, but by forming the magnetic sheath layer thin, it is possible to suppress an increase in the mass of the communication wire as a whole.
  • melt flow rate refers to a value measured at 230° C. with a load of 2.16 kg. Unless otherwise specified, other properties are values measured at room temperature in the atmosphere.
  • Organic polymers also include polymers with a relatively low degree of polymerization, such as oligomers.
  • FIG. 1 shows a cross-sectional view of a communication wire 1 according to an embodiment of the present disclosure, cut perpendicularly to the axial direction.
  • the communication wire 1 is configured as a coaxial wire.
  • the communication wire 1 includes a core wire 4 having a conductor 2 and an insulating layer 3 covering the outer circumference of the conductor 2 .
  • a metal foil 5 and a braided layer 6 formed by braiding metal wires are provided as a metal shield layer 7 around the outer circumference of the core wire 4 .
  • a metal foil 5 is provided to cover the outer periphery of the core wire 4
  • a braided layer 6 is provided to cover the outer periphery of the metal foil 5 .
  • a magnetic sheath layer 8 containing a magnetic material is provided around the metal shield layer 7 .
  • an outer sheath layer 9 containing no magnetic material is provided around the outer periphery of the magnetic sheath layer 8 .
  • the communication wire 1 as described above which is configured as a coaxial wire having a metal shield layer 7 and a magnetic sheath layer 8 on the outer periphery of the core wire 4, is suitable for transmitting signals in a high frequency range of 1 GHz or higher.
  • the communication wire according to the present disclosure is not limited to having the above structure as long as the outer side of the core wire 4 is covered and the magnetic sheath layer 8 is provided.
  • An appropriate configuration may be adopted.
  • the magnetic sheath layer 8 may cover the outer circumference of the core wire 4 directly, or may cover the outer circumference of the core wire 4 with another layer interposed like the metal shield layer 7 described above. good too.
  • a single insulated wire is used as the core wire 4, but a plurality of insulated wires may be used.
  • the core wire 4 can be configured such that a pair of insulated wires are twisted together or run in parallel to transmit a differential signal. If the influence of noise is not so great, only one of the metal foil 5 and the braided layer 6 may be arranged as the metal shield layer 7, or the metal shield layer 7 may be omitted. good too.
  • the metal shield layer 7 a form other than the metal foil 5 and the braided layer 6, such as a horizontally wound wire, may be used.
  • the outer sheath layer 9 may also be omitted if the function such as protection of the magnetic sheath layer 8 is not so required.
  • each of the layers described above is formed in direct contact with the outer periphery of the inner constituent layer, but the communication wire may appropriately include constituent layers other than the layers described above. There may be.
  • each constituent member of the coaxial communication wire 1 illustrated above will be described in detail.
  • the core wire 4 is a signal wire responsible for transmission of electrical signals in the communication wire 1 and has a conductor 2 and an insulating layer 3 covering the outer periphery of the conductor 2 .
  • the materials forming the conductor 2 and the insulating layer 3 are not particularly limited.
  • the conductor 2 may be configured as a single wire, it is preferably configured as a stranded wire in which a plurality of strands (for example, seven wires) are twisted together from the viewpoint of enhancing flexibility when bending. In this case, after twisting the strands, compression molding may be performed to form a compressed stranded wire.
  • the conductor 2 is configured as a stranded wire, all of them may be made of the same wire, or two or more kinds of wire may be included.
  • the diameter of the conductor 2 is not particularly limited.
  • the conductor cross-sectional area can be exemplified in the range of 0.05 mm 2 or more and 1.0 mm 2 or less.
  • the insulating layer 3 insulates the conductor 2 in the core wire 4 and contains an organic polymer.
  • the type of organic polymer is not particularly limited, but examples include olefin polymers such as polyolefins and olefin copolymers, halogen polymers such as polyvinyl chloride, various engineering plastics, elastomers, and rubbers. .
  • the organic polymers may be used singly or in combination of two or more by mixing, laminating, or the like.
  • the organic polymer may be crosslinked or foamed.
  • the insulating layer 3 includes a non-polar organic polymer such as polyolefin such as polypropylene (PP).
  • polyolefin such as polypropylene (PP).
  • PP polypropylene
  • homopolyolefin such as homo PP may be used, or block polyolefin such as block PP may be used.
  • the insulating layer 3 may contain additives as appropriate in addition to the organic polymer.
  • additives include flame retardants such as metal hydroxides, copper damage inhibitors, hindered phenol-based and sulfur-based antioxidants, and metal oxides such as zinc oxide.
  • flame retardants such as metal hydroxides, copper damage inhibitors, hindered phenol-based and sulfur-based antioxidants, and metal oxides such as zinc oxide.
  • the insulating layer 3 does not contain an additive made of a magnetic material such as that contained in the magnetic sheath layer 8 .
  • the thickness of the insulating layer 3 is not particularly limited, a range of 0.1 mm or more and 1.0 mm or less can be exemplified.
  • the metal shield layer 7 is provided between the core wire 4 and the magnetic sheath layer 8, and has a two-layer structure in which the metal foil 5 and the braided layer 6 are laminated.
  • the metal foil 5 is configured as a thin film of a metal material.
  • the type of metal forming the metal foil 5 is not particularly limited, and examples thereof include copper, copper alloys, aluminum, aluminum alloys, and the like.
  • the metal foil 5 may be composed of a single kind of metal, or may be a laminate of layers of two or more kinds of metals.
  • the metal foil 5 may be formed of an independent metal thin film, or may be formed by bonding a metal layer to a base material such as a polymer film by vapor deposition, plating, adhesion, or the like. From the viewpoint of enhancing noise shielding properties, it is preferable to arrange the metal foil 5 in a tandem manner with respect to the core wire 4 .
  • the braided layer 6 is configured as a braided body in which a plurality of metal wires are woven together to form a hollow tubular shape.
  • the metal wires forming the braided layer 6 include metal materials such as copper, copper alloys, aluminum, and aluminum alloys, and metal materials whose surfaces are plated with tin or the like.
  • the metal shield layer 7 constitutes an outer conductor in the coaxial cable structure, and plays a role of shielding noise entering the core wire 4 and noise emitted from the core wire 4 .
  • the noise shielding effect is also exhibited by the magnetic sheath layer 8.
  • the influence of noise tends to become serious, and by providing the metal shield layer 7 together with the magnetic sheath layer 8, the influence of noise can be effectively reduced.
  • the noise shielding effect can be enhanced.
  • the order of lamination of the metal foil 5 and the braided layer 6 is not particularly limited, it is preferable to arrange the metal foil 5 inside and the braided layer 6 outside for reasons such as reducing signal loss.
  • the magnetic sheath layer 8 covers the outer circumference of the core wire 4 .
  • the magnetic sheath layer 8 covers the outer periphery of the core wire 4 with the metal shield layer 7 interposed therebetween.
  • the magnetic sheath layer 8 contains a powdery magnetic material and an organic polymer component.
  • the magnetic material powder is dispersed in a matrix composed of organic polymer components.
  • the magnetic material contained in the magnetic sheath layer 8 is preferably a ferromagnetic material, more preferably a metal or metal compound having soft magnetism.
  • the magnetic loss in the magnetic material contained in the magnetic sheath layer 8 absorbs and attenuates high-frequency electromagnetic waves that can cause noise.
  • the noise shielding effect is exhibited also by the metal foil 5 and the braided layer 6, but when the communication wire 1 is used for communication in a high frequency range such as 1 GHz or higher, the influence of noise is large. It is likely to become serious, and by providing the magnetic sheath layer 8 together with the metal foil 5 and the braided layer 6, the influence of noise can be effectively reduced.
  • Magnetic materials Iron pure iron or iron containing a small amount of carbon
  • Fe—Si alloy silicon steel
  • Fe—Si Magnetic stainless steel such as -Al alloy (sendust), Fe--Cr--Al--Si alloy, Fe--Si--Cr alloy, Fe--Ni system alloy (permalloy), ferrite and the like can be exemplified.
  • ferrite it is particularly preferable to use ferrite because of its excellent noise shielding properties and low cost.
  • a Ni--Zn-based ferrite can be particularly suitably used.
  • the magnetic materials may be used singly or in combination of two or more by mixing or the like.
  • the particle size of the particles of the magnetic material contained in the magnetic sheath layer 8 is not particularly limited, but the average particle size is preferably 0.1 ⁇ m or more and 100 ⁇ m or less.
  • the content of the magnetic material in the magnetic sheath layer 8 is 350 parts by mass or more and 850 parts by mass or less when the entire organic polymer component constituting the magnetic sheath layer 8 is 100 parts by mass.
  • the magnetic sheath layer 8 can sufficiently improve the noise shielding performance due to the absorption of electromagnetic waves by the magnetic material. It is more preferable that the content of the magnetic material is 400 parts by mass or more in order to enhance the noise shielding performance of the magnetic sheath layer 8 .
  • the content of the magnetic material in the magnetic sheath layer 8 is suppressed to 850 parts by mass or less with respect to 100 parts by mass of the organic polymer component, an increase in the mass of the magnetic sheath layer 8 can be suppressed.
  • the extrudability of the composition forming the magnetic sheath layer 8 can be enhanced.
  • the content of the magnetic material is more preferably 800 parts by mass or less.
  • the content in units of parts by mass of each constituent component of the magnetic sheath layer 8 is expressed as 100 parts by mass of the entire organic polymer component forming the magnetic sheath layer 8 .
  • the material forming the magnetic sheath layer 8 contains an organic polymer.
  • a specific type of the organic polymer is not particularly limited as long as the composition as a whole constituting the magnetic sheath layer 8 gives an MFR within a predetermined range, which will be described later.
  • Examples of organic polymers that can be used for the magnetic sheath layer 8 include olefin-based polymers such as polyolefins and olefin-based copolymers, halogen-based polymers such as polyvinyl chloride, various engineering plastics, as well as the insulating layer 3 of the core wire 4 . Elastomers, rubbers and the like can be mentioned.
  • the organic polymers may be used singly or in combination of two or more by mixing or the like.
  • the organic polymer may be crosslinked or foamed.
  • the magnetic sheath layer 8 preferably contains an elastomer, particularly an olefinic thermoplastic elastomer (TPO), among those listed above. Elastomers such as TPO increase the flexibility of the magnetic sheath layer 8 .
  • the content of the elastomer should be 20% by mass or more and 40% by mass or less of the total organic polymer components constituting the magnetic sheath layer 8 .
  • the magnetic sheath layer 8 preferably contains polyolefin such as polypropylene (PP) in addition to elastomer such as TPO.
  • polyolefin tends to exhibit low viscosity when melted, and enhances the extrusion moldability of the magnetic sheath layer 8 .
  • PP polypropylene
  • Block polyolefins are preferably used. From the viewpoint of increasing the MFR of the composition constituting the magnetic sheath layer 8 as a whole, the polyolefin preferably has an MFR of 30 g/10 minutes or more, more preferably 50 g/10 minutes or more.
  • the polyolefin content is preferably 20% by mass or more and 40% by mass or less in the organic polymer component. In addition, it is preferable that the total amount of the elastomer and the polyolefin is 50% by mass or more of the organic polymer component.
  • suitable examples of organic polymer components contained in the magnetic sheath layer 8 include ethylene-ethyl acrylate copolymer (EEA), ethylene-methyl acrylate copolymer (EMA), and ethylene-acetic acid.
  • EAA ethylene-ethyl acrylate copolymer
  • EMA ethylene-methyl acrylate copolymer
  • Ethylene-based copolymers such as vinyl copolymers (EVA), acid-modified polymers, and the like can be mentioned.
  • EVA vinyl copolymers
  • EVA acid-modified polymers
  • the magnetic sheath layer 8 may contain additives as appropriate. Examples of additives include flame retardants, copper damage inhibitors, antioxidants, metal oxides, and the like.
  • the composition forming the magnetic sheath layer 8 has an MFR of 11.8 g/10 minutes or more measured at 230° C. under a load of 2.16 kg.
  • the composition constituting the magnetic sheath layer 8 has a high MFR, so that it has high extrusion moldability, and the magnetic sheath layer 8 having a highly uniform structure can be formed by extrusion molding.
  • the material has a high viscosity when forming the magnetic sheath layer 8 by extrusion. If there is a possibility that the material will not stretch and break in the vicinity of the ejection port of the molding device, then a hole in which the material is partially missing may occur in the formed magnetic sheath layer 8 .
  • the composition constituting the magnetic sheath layer 8 has an MFR of 11.8 g/10 minutes or more, the extrusion molding can proceed smoothly, and the magnetic material has a dense structure and a smooth surface. A sheath layer 8 can be formed.
  • the magnetic sheath layer 8 contains a large amount of magnetic material of 350 parts by mass or more, defects such as holes occur in the magnetic sheath layer 8 even when the magnetic sheath layer 8 is formed thin. Hateful. Then, in the magnetic sheath layer 8, penetration and emission of electromagnetic waves through defects are less likely to occur, and in the communication wire 1, high noise shielding properties can be ensured.
  • the communication wire 1 by forming the magnetic sheath layer 8 thin while ensuring sufficient noise shielding performance, it is possible to suppress an increase in the mass of the magnetic sheath layer 8 and further the mass of the communication wire 1 as a whole. can.
  • the communication wire 1 is mounted on a moving object such as an automobile, it is very important to suppress an increase in mass.
  • the communication wire 1 according to the present embodiment includes the metal shield layer 7 made up of the metal foil 5 and the braided layer 6. These contribute to increase the mass of the communication wire 1, but the magnetic field By reducing the weight of the sheath layer 8, an increase in the mass of the communication wire 1 as a whole can be suppressed.
  • the MFR of the composition constituting the magnetic sheath layer 8 is 15 g/10 minutes or more, further 17 g/10 minutes or more. is more preferable.
  • the MFR of the magnetic sheath layer 8 can be adjusted by the type of organic polymer forming the magnetic sheath layer 8, the content of the magnetic material, and the like.
  • the upper limit of the MFR of the composition forming the magnetic sheath layer 8 is not particularly limited.
  • the low-temperature impact resistance of the magnetic sheath layer 8 can be enhanced by keeping the MFR low to some extent.
  • a material with a lower glass transition temperature has a higher low temperature impact resistance.
  • the MFR of the composition constituting the magnetic sheath layer 8 is, for example, 23.9 g/10 min or less, and further is preferably kept low to some extent, such as 20 g/10 minutes or less. Since the magnetic sheath layer 8 has a high low-temperature impact resistance, it is less likely to be damaged such as broken even when subjected to an impact in a low-temperature environment, and high noise shielding properties can be maintained. It should be noted that high low-temperature impact resistance is not essential for the communication wire 1 of the present disclosure, and may not be provided when use in a low-temperature environment is not assumed.
  • the composition constituting the magnetic sheath layer 8 has a high MFR of 11.8 g/10 min or more, thereby suppressing the formation of defects such as holes.
  • the magnetic sheath layer 8 can be formed thin.
  • the specific thickness of the magnetic sheath layer 8 is not particularly limited, but the effect of suppressing defect generation by increasing the MFR of the magnetic sheath layer 8 can be obtained, and the thickness can be effectively reduced by thinning. 0.16 mm or less is preferable from the viewpoint of achieving .
  • the thickness of the magnetic sheath layer 8 is set so that the mass of the magnetic sheath layer 8 per unit length of the communication wire 1 is 4 g/m or less, further 3 g/m or less, or 2 g/m or less. do it.
  • the lower limit of the thickness of the magnetic sheath layer 8 is not particularly defined from the viewpoint of mass reduction, it is preferable to set it at 0.12 mm or more from the viewpoint of ensuring high noise shielding properties. Further, it is preferable that the mass of the magnetic sheath layer 8 per unit length is 1.5 g/m or more.
  • the relationship between the thickness d (unit: mm) of the magnetic sheath layer 8 and the mass A (unit: g/m) of the magnetic sheath layer 8 per unit length can be determined by the following formula (1).
  • ⁇ is the density of the composition forming the magnetic sheath layer 8 (unit: g/cm 3 )
  • R 0 is the inner diameter of the magnetic sheath layer 8 (unit: mm).
  • Layer 8 is more effective in noise shielding.
  • the specific magnetic material content and the thickness of the magnetic sheath layer 8 may be appropriately set within a range of 350 parts by mass or more and 850 parts by mass or less according to the required noise shielding property. Just do it.
  • ⁇ Thickness of 0.12 mm or more and less than 0.13 mm Content of more than 650 parts by mass and less than 850 parts by mass
  • ⁇ Thickness of 0.13 mm or more and less than 0.14 mm Content of more than 550 parts by mass and less than 650 parts by mass
  • ⁇ Thickness 0.14 mm or more and 0.16 mm or less content of 350 parts by mass or more and 550 parts by mass or less
  • the outer sheath layer 9 is a layer provided to cover the outer periphery of the magnetic sheath layer 8 and is exposed to the outer periphery of the communication wire 1 as a whole.
  • the outer sheath layer 9 contains no magnetic material except for inevitable impurities.
  • the outer sheath layer 9 plays a role of physically protecting the magnetic sheath layer 8 and the constituent members further inside from contact with external objects.
  • the outer sheath layer 9 preferably contains an organic polymer.
  • organic polymers include olefin polymers such as polyolefins and olefin copolymers, halogen polymers such as polyvinyl chloride, and various engineering plastics, similar to the organic polymers forming the insulating layer 3 and the magnetic sheath layer 8. , elastomers, rubbers, and the like. Among them, it is preferable to use an olefin-based polymer, particularly TPO, because of its excellent insulating properties and heat resistance.
  • the organic polymers may be used singly or in combination of two or more by mixing, laminating, or the like.
  • the organic polymer may be crosslinked or foamed.
  • the same organic polymer as at least a part of the organic polymers constituting the magnetic sheath layer 8 is also used in the outer sheath layer 9.
  • the outer sheath layer 9 may also contain the same type of elastomer as that contained in the magnetic sheath layer 8 .
  • the thickness of the outer sheath layer 9 is not particularly limited, it is preferably 0.1 mm or more from the viewpoint of enhancing the protective performance for the magnetic sheath layer 8. On the other hand, the thickness of the outer sheath layer 9 is preferably set to 0.5 mm or less from the viewpoint of facilitating enhancement of flexibility.
  • An insulating layer was formed by extrusion molding on the outer periphery of a conductor configured as a copper alloy stranded wire to form a core wire.
  • a constituent material of the insulating layer a mixture of each component indicated as "insulating layer" in Table 1 below was used.
  • the cross-sectional area of the conductor was 0.18 mm 2 and the thickness of the insulating layer was 0.54 mm.
  • a copper foil was arranged vertically as a metal foil on the outer circumference of the core wire. Furthermore, a braided layer was formed on the outer circumference of the copper foil. The braid layer was constructed as a single braid made of tin-plated annealed copper wire (TA wire).
  • TA wire tin-plated annealed copper wire
  • a magnetic sheath layer was formed on the outer circumference of the braided layer by extrusion molding.
  • a composition constituting the magnetic sheath layer a mixture of the organic polymer and the magnetic material powder shown in Table 2 below was used in each of the samples A1 to A11. As shown in Table 2, the thickness of the magnetic sheath layer was 0.3 mm or 0.15 mm.
  • an outer sheath layer was formed on the outer periphery of the magnetic sheath layer by extrusion molding to complete a communication wire.
  • the thickness of the outer sheath layer was 0.2 mm.
  • a mixture of each component indicated as "outer sheath layer" in Table 1 below was used for each sample.
  • the outer diameters of the obtained communication wires were 3.2 mm and 2.9 mm when the thickness of the magnetic sheath layer was 0.3 mm and 0.15 mm, respectively.
  • the following components were used for the components constituting the insulating layer, the magnetic sheath layer, and the outer sheath layer.
  • the organic polymers those used for the magnetic sheath layer are also shown together with the density and MFR (value at 230° C., load of 2.16 kg).
  • TPO1 TPO “Adflex Q200F” manufactured by Lyondell Basell, density: 0.88 g/cm 3 , MFR: 0.8 g/10 min
  • TPO2 TPO “Santoprene 203-40” manufactured by Exxon-Mobil
  • ⁇ PP1 Block PP “Novatec EC9GD” manufactured by Japan Polypropylene Corporation
  • ⁇ PP2 Homo PP “Novatec EA9FTD” manufactured by Japan Polypro Co., Ltd.
  • ⁇ PP3 Block PP “Novatec BC06C” manufactured by Japan Polypropylene Corporation, density: 0.91 g / cm 3 , MFR: 60 g / 10 minutes ⁇ Acid-modified SEBS: “Tuftec M1913” manufactured by Asahi Kasei Corporation ⁇ EEA: "NUC 6940" manufactured by ENEOS NUC, density: 0.95 g/cm 3 , MFR: 20 g/10 minutes (magnetic material) ⁇ Ni—Zn ferrite: “KNI-109” manufactured by JFE Chemical, density: 5.15 g/cm 3 (Other additives) ⁇ Copper damage inhibitor: “CDA-1” manufactured by ADEKA - Hindered phenol-based antioxidant: BASF "Irganox 1010” ⁇ Sulfur-based antioxidant: “Antage MB” (2-mercaptobenzimidazole) manufactured by Kawaguchi Chemical Co., Ltd. ⁇ Zinc oxide: “Zinc white 2” manufactured
  • Table 1 shows the component compositions of the materials used to fabricate the insulating layer and the outer sheath layer of all the samples in units of parts by mass.
  • Noise Shielding Performance was evaluated for the communication wires of Samples A1 to A11.
  • a radiated emission evaluation based on CISPR25 was performed. Specifically, in the anechoic chamber, a horn antenna was installed at a position laterally separated by 1.0 m from the central portion of the communication wire cut to 1500 mm. Then, an electrical signal with a frequency of 1.6 GHz was input to the communication wire, and the amount of noise radiation at this time was measured by a horn antenna. When the noise radiation amount was less than 10 dB ( ⁇ V/m) (Level 5), the noise shielding property was evaluated as very high (A+).
  • the noise shielding property was evaluated as high (A).
  • the noise radiation amount was 16 dB ( ⁇ V/m) or more and less than 22 dB ( ⁇ V/m) (Level 3)
  • the noise shielding property was evaluated as low (B).
  • the noise radiation amount was 22 dB ( ⁇ V/m) or more (Level 2)
  • the noise shielding property was evaluated as very low (B-).
  • each sample in the stage before forming the outer sheath layer was cut into a length of 1 m. Then, each member inside the magnetic sheath layer was removed, leaving only the magnetic sheath layer. The mass of the obtained magnetic sheath layer was measured.
  • the thickness of the magnetic sheath layer is 0.3 mm. None of these samples had holes formed in the magnetic sheath layer (A). The noise shielding property is improved as the content of the magnetic material increases from sample A1 to sample A4.
  • sample A5 the same material as sample A4 is used to form a thin magnetic sheath layer with a thickness of 0.15 mm.
  • sample A4 no holes were formed in the magnetic sheath layer (A), and very high noise shielding properties (A+) were obtained, whereas in sample A5, holes were formed in the magnetic sheath layer (B). , the noise shielding performance is very low (B-).
  • the MFR of the material as a whole is increased by decreasing the TPO content and increasing the PP content from sample A5 to sample A11.
  • Samples A7 to A11 with an MFR exceeding 11 g/10 minutes no longer form holes in the magnetic sheath layer (A), and very high noise shielding properties (A+) are obtained. From this, by increasing the MFR of the composition constituting the magnetic sheath layer, the extrusion moldability is improved, and even when the magnetic sheath layer is formed thin, holes are not formed in the magnetic sheath layer. It can be seen that a magnetic sheath layer exhibiting noise shielding performance can be obtained.
  • the mass of the magnetic sheath layer already increases from the region where the content of the magnetic material per 100 parts by mass of the organic polymer component is as low as 150 parts by mass.
  • the magnetic sheath layer was formed as thin as 0.15 mm. As a result, the mass of the magnetic sheath layer is suppressed to 4 g/m or less.
  • samples A7 to A11 all have very high noise shielding properties (A+). Focusing on low-temperature impact resistance, samples A7 to A9 have high low-temperature impact resistance. (A), the samples A10 and A11 having an MFR exceeding 30 g/10 min have low low-temperature resistance (B). From this, it can be said that it is preferable to prevent the MFR from becoming too high when low-temperature impact resistance is required, such as when a communication wire is used in a low-temperature environment.
  • Table 3 shows the composition constituting the magnetic sheath layer and the thickness of the magnetic sheath layer.
  • the organic polymer component constituting the magnetic sheath layer was the same as that of sample A8 of test [1], and the magnetic material content was varied between samples B1 to B8.
  • the thickness of the magnetic sheath layer is set so that the mass of the magnetic sheath layer per unit length is 3 g/m. Specifically, assuming that there is no volume change due to mixing of the components, the density of the magnetic sheath layer is calculated as shown in the table based on the density of each constituent component of the magnetic sheath layer. Second, the thickness of the magnetic sheath layer was set so that the mass was 3 g/m. No holes were formed in the surface of the magnetic sheath layer in any of the samples produced.
  • samples B4 and B8b were produced as samples B4a, B4b, and samples B8a, B8b.
  • the thickness of the magnetic sheath layer was 0.12 mm, 0.14 mm, and 0.16 mm for all compositions.
  • Table 3 shows the component compositions and thicknesses of the magnetic sheath layers of samples B1 to B8, and evaluation results of noise shielding properties.
  • samples B4 to B8 in which the content of the magnetic material in the composition constituting the magnetic sheath layer is 350 parts by mass or more and 850 parts by mass or less, have a mass per unit length of 3 g/m.
  • the thickness of the magnetic sheath layer which is defined as the thickness of the magnetic sheath layer, is in the range of 0.12 mm or more and 0.16 mm or less. Sufficiently high noise shielding properties were obtained for all of the samples B4 to B8 (A or A+).
  • samples B1 to B3 in which the thickness of the magnetic sheath layer exceeds 0.16 mm but the content of the magnetic material is less than 350 parts by mass, do not provide sufficient noise shielding properties (B or B -).
  • Table 4 shows the component composition and thickness of the magnetic sheath layers in samples B4, B4a, B4b and samples B8, B8a, B8b, and evaluation results of noise shielding properties.
  • the noise radiation amount is almost the same even if the thickness of the magnetic sheath layer is different. From this, it is confirmed that the noise shielding performance of the magnetic sheath layer does not substantially depend on the thickness of the magnetic sheath layer in the range of 0.12 to 0.16 mm, and is mainly determined by the concentration of the magnetic material. be done.
  • the magnetic material concentration of 850 parts by mass of sample B8 is the highest among those shown in Table 3 above, even with the magnetic sheath material containing the magnetic material at the maximum concentration, sample B8 , it can be seen that even a thin layer region with a thickness of 0.12 mm has a very high noise shielding property (A+), and a magnetic sheath layer without holes can be formed. That is, from the results of Table 4, the density of the magnetic material in the magnetic sheath material is set to be in the range of 350 parts by mass to 850 parts by mass with respect to 100 parts by mass of the organic polymer component, and the thickness is 0.12 mm to 0.16 mm. If the magnetic sheath layer is formed, high noise shielding properties can be obtained by satisfying both requirements of containing a sufficient concentration of magnetic material and forming a magnetic sheath layer without holes.
  • the content of the magnetic material is 350 parts by mass or more and 850 parts by mass or less with respect to 100 parts by mass of the organic polymer component, and the thickness of the magnetic sheath layer is 0.12 mm or more and 0.16 mm or less. Then, a sufficiently high noise shielding property can be secured.
  • the weight of the magnetic sheath layer can be reduced to a mass of 3 g/m or less.
  • Tables 5 and 6 below show the component composition and thickness of the magnetic sheath layer and the results of each evaluation for samples C1 to C17.
  • the MFR of the composition constituting the magnetic sheath layer is 11.8 g/10 min or more.
  • the MFR of the composition constituting the magnetic sheath layer is 23.9 g/10 minutes or less (Samples C1 to C6, C9 to C14), the low temperature impact resistance can be increased (A).

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Insulated Conductors (AREA)
  • Communication Cables (AREA)

Abstract

L'invention fournit un fil électrique pour communication dans lequel des défauts dans une couche de gaine magnétique sont peut susceptibles de se produire, y compris lorsque la couche de gaine magnétique comprenant un matériau magnétique en poudre est finement formée.　Plus précisément, l'invention concerne un fil électrique pour communication (1) qui possède un conducteur (2), une couche isolante (3) revêtant la périphérie externe dudit conducteur (2), et la couche de gaine magnétique (8) revêtant un côté externe de ladite couche isolante (3). Ladite couche de gaine magnétique (8) comprend un polymère organique, et le matériau magnétique en poudre. La teneur en matériau magnétique dans ladite couche de gaine magnétique (8), est supérieure ou égale à 350 parties en masse et inférieure ou égale à 850 parties en masse pour 100 parties en masse dudit polymère organique. La composition configurant ladite couche de gaine magnétique (8) présente un indice de fluidité à chaud mesuré à 230°C et à une charge de ２,１６ｋｇ, supérieur ou égal à １１,８ｇ／１０ minutes.
PCT/JP2022/007150 2021-03-08 2022-02-22 Fil électrique pour communication WO2022190851A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-036083 2021-03-08
JP2021036083A JP2022136460A (ja) 2021-03-08 2021-03-08 通信用電線

Publications (1)

Publication Number Publication Date
WO2022190851A1 true WO2022190851A1 (fr) 2022-09-15

Family

ID=83227686

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/007150 WO2022190851A1 (fr) 2021-03-08 2022-02-22 Fil électrique pour communication

Country Status (2)

Country Link
JP (1) JP2022136460A (fr)
WO (1) WO2022190851A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1186641A (ja) * 1997-09-10 1999-03-30 Hitachi Metals Ltd ケーブル
JP2004158328A (ja) * 2002-11-07 2004-06-03 Hitachi Cable Ltd ノイズ抑制ケーブル
JP2005228694A (ja) * 2004-02-16 2005-08-25 Hitachi Cable Ltd 放射電磁波抑制電線及びその製造方法
JP2015153736A (ja) * 2014-02-19 2015-08-24 日立金属株式会社 ノイズ抑制ケーブル
JP2016024953A (ja) * 2014-07-18 2016-02-08 日立金属株式会社 ノイズシールド用テープ及びノイズシールドケーブル
JP2016201272A (ja) * 2015-04-10 2016-12-01 日立金属株式会社 ノイズシールドケーブル

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1186641A (ja) * 1997-09-10 1999-03-30 Hitachi Metals Ltd ケーブル
JP2004158328A (ja) * 2002-11-07 2004-06-03 Hitachi Cable Ltd ノイズ抑制ケーブル
JP2005228694A (ja) * 2004-02-16 2005-08-25 Hitachi Cable Ltd 放射電磁波抑制電線及びその製造方法
JP2015153736A (ja) * 2014-02-19 2015-08-24 日立金属株式会社 ノイズ抑制ケーブル
JP2016024953A (ja) * 2014-07-18 2016-02-08 日立金属株式会社 ノイズシールド用テープ及びノイズシールドケーブル
JP2016201272A (ja) * 2015-04-10 2016-12-01 日立金属株式会社 ノイズシールドケーブル

Also Published As

Publication number Publication date
JP2022136460A (ja) 2022-09-21

Similar Documents

Publication Publication Date Title
JP2023040047A (ja) 通信用電線
JP7388527B2 (ja) 通信用電線
CN202454299U (zh) 电动汽车用高压屏蔽电缆
JP5416484B2 (ja) 車載用アンテナ同軸ケーブル
WO2022190851A1 (fr) Fil électrique pour communication
JP7122829B2 (ja) ケーブルおよびケーブルの製造方法
US11912850B2 (en) Resin composition for insulating layer, insulated electric wire, and cable
JP7211575B2 (ja) 通信用電線
WO2020183925A1 (fr) Fil électrique de blindage de communication
JP2022108557A (ja) 通信用電線
WO2023127622A1 (fr) Câble électrique de communication
WO2022191019A1 (fr) Fil électrique pour communication
WO2022113900A1 (fr) Fil isolé et câble de transmission d'informations
WO2023228500A1 (fr) Fil isolé et câble de transmission d'informations
WO2022209960A1 (fr) Feuille de blindage et fil électrique de communication
JP2023140603A (ja) 通信用電線
US20230141502A1 (en) Vehicle cable
JP2022083355A (ja) 絶縁電線及び情報伝送用ケーブル
JP2023069558A (ja) 太物電線
JP2012119197A (ja) 伝送ケーブル用絶縁電線及び伝送ケーブル
JP2017224560A (ja) 電線およびケーブル
JPH11353942A (ja) 電力ケーブル

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22766813

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22766813

Country of ref document: EP

Kind code of ref document: A1