WO2019058437A1 - Câble de communication blindé - Google Patents

Câble de communication blindé Download PDF

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Publication number
WO2019058437A1
WO2019058437A1 PCT/JP2017/033779 JP2017033779W WO2019058437A1 WO 2019058437 A1 WO2019058437 A1 WO 2019058437A1 JP 2017033779 W JP2017033779 W JP 2017033779W WO 2019058437 A1 WO2019058437 A1 WO 2019058437A1
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WO
WIPO (PCT)
Prior art keywords
shield
film
wire
communication
braided
Prior art date
Application number
PCT/JP2017/033779
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English (en)
Japanese (ja)
Inventor
亮真 上柿
田口　欣司
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.)
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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
Priority to PCT/JP2017/033779 priority Critical patent/WO2019058437A1/fr
Publication of WO2019058437A1 publication Critical patent/WO2019058437A1/fr

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    • 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
    • H01B11/10—Screens specially adapted for reducing interference from external sources
    • H01B11/1033—Screens specially adapted for reducing interference from external sources composed of a wire-braided conductor
    • 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
    • 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
    • H01B11/02—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
    • H01B11/10—Screens specially adapted for reducing interference from external sources
    • H01B11/1016—Screens specially adapted for reducing interference from external sources composed of a longitudinal lapped tape-conductor
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields

Definitions

  • the present invention relates to a shielded communication wire, and more particularly to a shielded communication wire that can be used for high-speed communication in an automobile or the like.
  • Patent Document 1 As an electric wire used for high-speed communication, the outer periphery of a twisted pair formed by twisting a pair of insulated electric wires consisting of a conductor and an insulating coating covering the outer periphery of the conductor.
  • a shield wire for communication provided with a metal foil shield is known.
  • the metal foil shield is provided in order to shield the ingress of noise from the outside to the twisted wire and the emission of noise from the twisted wire to the outside.
  • braided shields may be used.
  • a shield made of metal foil or braided material is provided on the outer periphery of the twisted wire pair for shielding noise, but a shield made of metal foil or braided material is arranged In some cases, the noise can not be shielded sufficiently. In particular, high noise shielding is required when the communication shielded wire is used in a high frequency band such as the GHz band.
  • An object of the present invention is to provide a shield wire for communication excellent in noise shielding property.
  • a shield wire for communication comprises a conductor and a pair of twisted wires formed by twisting a pair of insulated wires consisting of an insulation coating covering the outer periphery of the conductor, and a braided shield And a film-like shield having a metal film, wherein the braided shield and the film-like shield are laminated to each other to directly cover the outer periphery of the twisted pair.
  • the film-like shield may be provided on the outside of the braided shield.
  • the film-like shield may be a composite in which a polymer film and the metal film are laminated. It is preferable that the film-like shield be disposed vertically on the twisted pair wire.
  • the shield wire for communication preferably covers the outer periphery of the braided shield and the film-like shield and further includes a jacket made of an insulating material.
  • the film-like shield may be provided outside the braided shield, and the jacket may be bonded to the film-like shield to cover the outer periphery of the film-like shield.
  • the twist pitch in the said twisted pair wire is 30 mm or less.
  • the breaking elongation of the conductor of the insulated wire is preferably 7% or more.
  • the braided shield and the film-like shield having a metal film are laminated to cover the outer periphery of the twisted pair wire.
  • the shield wire for communication has high noise shielding property compared with the case where a metal foil shield or a braided shield is used alone.
  • a braided shield and a film-like shield directly cover the outer periphery of the twisted pair, and no other member such as a tape is disposed on the outer periphery of the twisted pair, so that a laminate of the braided shield and the film-shaped shield
  • the effect of noise shielding can be used as it is without being influenced by the presence of a tape or the like, and the configuration of the shield wire for communication can be simplified.
  • the noise shielding property is particularly high.
  • the film-like shield is a composite in which a polymer film and a metal film are laminated
  • the polymer film can ensure the mechanical strength and the handleability of the film-like shield.
  • the film-like shield can be simply arranged as compared with the case where the film-like shield is arranged horizontally.
  • the placement of the film-like shield in the side-by-side is done together with the extrusion coating of the jacket in a single step. be able to.
  • the film-like shield can be disposed without contributing to the increase in the number of steps, thereby contributing to the improvement of the noise shielding property.
  • the shield wire for communication covers the outer periphery of the braided shield and the film-like shield and further has a jacket made of an insulating material
  • the jacket physically covers the braided shield and the film-like shield and the twisted pair wire. Play a role in protecting
  • the film-like shield is provided on the outside of the braided shield and the jacket is adhered to the film-like shield to cover the outer periphery of the film-like shield, the film-like shield is jacketed It is possible to remove it integrally. Thereby, when processing the terminal of the shield wire for communication, etc., both a jacket and a film-like shield can be removed by a single process, and the workability of the shield wire for communication becomes high.
  • the twist pitch in the twisted pair is 30 mm or less
  • the braided shield and the film-like shield are directly disposed on the outer periphery of the twisted pair, and the twisted pair is not fixed by a tape or the like.
  • the twist structure of the twisted pair can be stably maintained. As a result, stable transmission characteristics can be obtained in the shield wire for communication.
  • the twisted structure of the twisted pair can be stably maintained, and stable transmission characteristics can be obtained in the communication shielded wire.
  • the communication frequency to which the shielded cable for communication is applied for example, a frequency in the range of 300 kHz to 1 GHz. It is a defined value and is a value measured at room temperature in the air.
  • FIG. 1 shows a cross-sectional view of a communication shield wire 1 according to an embodiment of the present invention.
  • the communication shield wire 1 has a twisted pair wire 10 in which a pair of insulated wires 11 and 11 are twisted.
  • Each insulated wire 11 has a conductor 12 and an insulation coating 13 that covers the outer periphery of the conductor 12.
  • a shield body 40 is provided on the outer periphery of the twisted pair wire 10.
  • the shield body 40 is composed of a braided shield 20 and a film-like shield 30 stacked on each other.
  • the shield body 40 directly covers the outer periphery of the twisted pair wire 10. That is, the shield body 40 is twisted without any other member such as an insulating or conductive tape for firmly holding the twisted structure of the twisted wire 10 on the outer periphery of the twisted wire 10. It is in direct contact with the periphery of the line 10.
  • the braided shield 20 is provided inside to directly cover the outer periphery of the twisted pair wire 10
  • the film-like shield 30 is provided on the outside of the braided shield 20.
  • the communication shield wire 1 further has a jacket (sheath) 50 made of an insulating material so as to cover the outer periphery of the shield body 40.
  • a jacket 50 is provided on the outer periphery of the film-like shield 30 disposed outside the braided shield 20.
  • the shield wire for communication 1 has the shield body 40 having the laminated structure of the braided shield 20 and the film-like shield 30 on the outer periphery of the twisted pair wire 10.
  • the braided shield 20 constituting the shield body 40 is formed into a hollow cylindrical shape by weaving a thin metal wire made of a metal material such as copper, copper alloy, aluminum, aluminum alloy or a material plated on the surface thereof. It is The braided shield 20 serves to shield the twisted pair wire 10 from the ingress of external noise and the emission of external noise.
  • the configuration of the braided shield 20 (the number of strokes, the number of arms, the pitch, etc.) may be appropriately selected according to the desired noise shielding property.
  • the film-like shield 30 constituting the shield body 40 is a film-like material having a metal film, and the presence of the metal film causes external noise to enter the twisted wire pair 10 and external noise to be emitted. Play a role in shielding
  • the film-like shield 30 may be of any type as long as it has a metal film, and is in the form of a single metal film (metal foil), or a metal film and other materials such as a base material. It may be in any form of a composite material in which As a composite material, a polymer-metal composite film 30A in which a polymer film 31 as a base material and a metal film 32 are composited as shown in FIG. 2 can be mentioned as a suitable example. By combining the metal film 32 with the polymer film 31, the mechanical strength and the handleability of the entire film-like shield 30 can be improved more than when the metal film is used alone.
  • Specific metal species used for the film-like shield 30 as a single metal film or as a metal film in a composite material are not particularly limited, but metals such as copper, copper alloy, aluminum, aluminum alloy and the like Materials can be mentioned.
  • the metal film may be composed of a film of a single metal species, or layers of two or more metal species may be laminated.
  • materials other than metal, such as a protective film which consists of organic materials, may be suitably arrange
  • the polymer species constituting the polymer film 31 include polyester resins such as polyethylene terephthalate (PET), and polyolefin resins such as polypropylene (PP), Mention may be made of vinyl resins such as polyvinyl chloride (PVC).
  • the polymer film 31 may appropriately contain additives and the like in addition to various polymer species.
  • PET polyethylene terephthalate
  • PP polypropylene
  • PVC polyvinyl chloride
  • the polymer film 31 may appropriately contain additives and the like in addition to various polymer species.
  • PET polyethylene terephthalate
  • PP polypropylene
  • PVC polyvinyl chloride
  • the polymer film 31 may appropriately contain additives and the like in addition to various polymer species.
  • PET polyethylene terephthalate
  • PP polypropylene
  • PVC polyvinyl chloride
  • the polymer film 31 may appropriately contain additives and the like in addition to various polymer species.
  • PET polymer species
  • the thickness of the polymer film 31 is at least greater than the thickness of the metal film 32 from the viewpoint of sufficiently securing the mechanical strength and the handleability of the film-like shield 30 as a whole. Is particularly preferable, and 10 .mu.m or more is preferable. On the other hand, it is preferable that the thickness is 500 ⁇ m or less from the viewpoint of securing the diameter property and flexibility of the shield wire 1 for communication, the viewpoint of suppressing the influence on the noise shielding by the metal film 32, and the like.
  • the thickness of the metal film 32 constituting the polymer-metal composite film 30A is preferably 1 ⁇ m or more from the viewpoint of exhibiting a sufficient noise shielding property. On the other hand, the thickness is preferably 30 ⁇ m or less from the viewpoint of securing flexibility and the like.
  • the polymer film 31 and the metal film 32 which are separately formed may be laminated and fixed to each other by adhesion or the like.
  • the method of forming the metal film 32 by plating, vapor deposition, etc. on the surface of the polymer film 31 can be mentioned.
  • the metal film 32 may be provided on one side or both sides of the polymer film 31. However, as described later, when the film-like shield 30 is adhered to the jacket 50, as shown in FIG.
  • the metal film 32 is provided only on one side of the molecular film 31 and the adhesive layer 33 made of an adhesive is provided on the other side.
  • the shield wire 1 for communication has both the braided shield 20 and the film-like shield 30 as the shield body 40 in the state of being laminated on the outer periphery of the twisted pair wire 10 as the shield body 40.
  • the volume of the conductive material surrounding the outer periphery of the twisted pair wire 10 is increased, and a high noise shielding effect is achieved as compared with the case where only any one type of shield material is used. can do. That is, it is possible to effectively shield the ingress of external noise and the emission of external noise.
  • the effect of noise shielding improvement by the combined use of two kinds of shielding materials is effective particularly in a high frequency region such as 100 MHz or more.
  • the braided shield 20 and the film-like shield 30 in combination, the characteristics possessed by each can be used together.
  • the braided shield 20 the flexibility that the braided shield 20 has due to its structure can be used as a shielding material in order to enhance the noise shielding property while securing the flexibility required for the communication shielded wire 1 as a whole. It is possible to increase the volume of the metal material used.
  • the elastic property of the braided shield 20 can be used to directly ground the communication shield wire 1 with the braided shield 20.
  • the film-like shield 30 noise can be effectively shielded even with a thin metal film due to the continuity of the metal film.
  • the braided shield 20 is used alone, there is a possibility that the noise shielding property may be reduced due to the presence of the void of the mesh in the braided structure (the portion of the space where the metal material surrounded by the wire does not exist).
  • the braided shield 20 is laminated with the film-like shield 30 having a metal film as in the present embodiment, the gaps of the braided shield 20 are covered with the metal film. This suppresses the penetration and emission of noise through the stitches, and can improve the noise shielding property as compared to the case where the braided shield 20 is used alone.
  • the lamination order of the braided shield 20 and the film-like shield 30 is not particularly limited, and any may be disposed inside.
  • the braided shield 20 is disposed inside and the film-like shield 30 is disposed outside.
  • noise shielding can be achieved more effectively than in the case where the film-like shield 30 is disposed inside and the braided shield 20 is disposed outside as shown in the later embodiments.
  • the film shield 30 and the braided shield 20 are laminated one by one as in the present embodiment.
  • the film-like shield 30 and the braided shield 20 be in direct contact with each other without passing through another substance, but It does not prevent another member from being interposed between the two. Adhesion is not performed between the film-like shield 30 and the braided shield 20, and between those disposed inside and the twisted wire pair 10.
  • the film-like shield 30 is made of a composite of the metal film 32 and a substrate 31 made of another material as in the polymer-metal composite film 30A of FIG. If the direction of the surface of the film-like shield 30 is set so that the surface of the film 32 faces the braided shield 20, the shield can be obtained by direct contact between the metal film 32 and the wires constituting the braided shield 20. It is possible to effectively enhance the noise shielding property by 40. That is, when the film-like shield 30 made of the polymer-metal composite film 30A having the metal film 32 only on one side of the polymer film 30A is disposed outside the braided shield 20, the surface of the metal film 32 is inside.
  • the polymer-metal composite film 30A may be disposed such that the surface of the polymer film 31 faces outward.
  • the adhesive layer 33 is provided on the surface of the polymer film 31 on which the metal film 32 is not disposed, the jacket 50 covering the outer periphery of the film shield 30 is interposed through the adhesive layer 33. Can be bonded to the film-like shield 30.
  • the film shield 30 may be disposed in any state as long as it covers the outer periphery of the twisted pair wire 10 directly or through the braided shield 20 without any gap.
  • positioning state the form which arrange
  • a film is formed along the circumferential direction of the twisted wire 10 in a state in which the axial direction of the twisted wire 10 and the longitudinal axis of the surface of the film shield 30 are substantially parallel.
  • the film-like shield 30 is disposed so as to wrap the twisted pair wire 10 on the side of the shield 30.
  • the film-like shield 30 formed into a tape shape is wound around the outer periphery of the twisted pair wire 10 in a spiral shape with the axial direction of the twisted wire pair 10 as the center.
  • the film-like shield 30 is overlapped between the turns of the spiral and appropriately bonded, so that the outer periphery of the twisted pair wire 10 can be surrounded without any gap.
  • the arrangement of the film-like 30 can be performed more simply than in the case of arranging in a transversely wound manner.
  • the sheet-like film-like shield 30 only needs to be placed along the twisted wire pair 10 and wrapped along the circumferential direction, whereas in the case of arranging horizontally wound This is because it is necessary to perform spiral winding while relatively rotating the tape-like film-like shield 30 around the twisted pair wire 10.
  • the braided shield 20 is provided inside as the shield body 40, the film shield 30 is provided on the outer periphery thereof, and the jacket 50 is further provided on the outer periphery thereof, the arrangement by the vertical attachment of the film shield 30
  • the forming of the jacket 50 by molding can be carried out simultaneously and simultaneously as a single step.
  • the film-like shield 30 has the adhesive layer 33
  • the adhesion between the film-like shield 30 and the jacket 50 can also be carried out simultaneously.
  • the film-shaped shield 30 can be introduced and adhered without increasing the number of steps.
  • the film shield 30 by disposing the film shield 30 in a vertically attached shape, removal of the film shield 30 can be simplified more easily when processing the end of the shield wire 1 for communication, etc.
  • the processability of the shield wire 1 for communication is enhanced.
  • the end of the communication shield wire 1 is obtained. It is because the film-like shield 30 can be removed from the like.
  • the braided shield 20 is disposed inside as the shield body 40 and the film-like shield 30 is disposed longitudinally outside like a shield and the jacket 50 is adhered to the outer periphery of the film-like shield 30.
  • the jacket 50 and the film-like shield 30 can be collectively removed from the end of the case, etc., to expose the braided shield 20.
  • composition of twisted pair wire (1) Configuration of Insulated Wire Details of materials, dimensions, and the like of the respective insulated wires 11 constituting the twisted pair wire 10 are not particularly specified.
  • the conductor 12 constituting the insulated wire 11 may be appropriately made of a metal material such as a copper alloy, and the insulating coating 13 may be suitably made of an insulating polymer material.
  • the conductor 12 which comprises the insulated wire 11 has 7% or more of breaking elongation.
  • the conductor 12 has a high breaking elongation, the twisted structure of the twisted pair wire 10 can be stably maintained, and the loosening of the twisted structure can be effectively suppressed.
  • the shield body 40 directly covers the outer periphery of the twisted pair wire 10, and a pair of tapes or the like for holding the twisted structure of the twisted wire pair 10 without looseness.
  • the distance (inter-line distance) between the two insulated wires 11 and 11 constituting the twisted pair wire 10 is set to a small value, for example, substantially at each portion in the pitch. It becomes possible to maintain stable transmission characteristics by maintaining it at 0 mm.
  • the characteristic impedance is likely to be excessively large, and the characteristic impedance is likely to change with time. By suppressing the looseness of the cable, it is possible to stably achieve the characteristic impedance (for example, 100 ⁇ 10 ⁇ ) of the size required for the communication shielded wire 1.
  • the conductor 12 preferably has a tensile strength of 400 MPa or more. Since the conductor 12 has high tensile strength, the tensile strength required for the wire can be maintained even if the diameter is reduced. By reducing the diameter of the conductor 12, the distance between the two conductors 12 and 12 constituting the twisted pair wire 10 (the distance connecting the centers of the conductors 12 and 12) becomes close, and the characteristics of the shield wire 1 for communication The impedance increases.
  • the characteristic impedance (for example, 100 ⁇ 10 ⁇ ) required for the communication shielded wire 1 can be obtained by the effect of reducing the diameter of the conductor 12 ) Will be easier to secure.
  • the diameter of the conductor 12 can be reduced to the extent that the conductor cross-sectional area becomes 0.15 mm 2 or less.
  • the conductor 12 may be a single wire, but it is preferable that the conductor 12 be a twisted wire in which a plurality of strands (for example, seven) are twisted in order to increase the flexibility. In this case, after the strands are twisted together, compression molding may be performed to form a compressed stranded wire.
  • the conductor 12 When the conductor 12 is a stranded wire, it may be all the same strand or may be two or more strands.
  • the conductor 12 preferably has a high elongation at break, and the elongation at break of the conductor 12 depends on the component composition of the conductor 12.
  • the breaking elongation of the conductor 12 can be increased by heat treatment after drawing.
  • first and second copper alloy wires having the following component compositions may be exemplified it can.
  • the first copper alloy wire contains the following component elements, with the balance being composed of Cu and unavoidable impurities.
  • Fe 0.05% by mass or more, 2.0% by mass or less
  • Ti 0.02% by mass or more, 1.0% by mass or less
  • Mg 0% by mass or more, 0.6% by mass or less (containing Mg Not included))
  • the second copper alloy wire contains the following component elements, with the balance being composed of Cu and unavoidable impurities.
  • -Fe 0.1 mass% or more, 0.8 mass% or less-P: 0.03 mass% or more, 0.3 mass% or less-Sn: 0.1 mass% or more, 0.4 mass% or less
  • the insulation coating 13 of the insulated wire 11 may be made of any insulating polymer material. From the viewpoint of securing a predetermined value (for example, 100 ⁇ 10 ⁇ ) as the characteristic impedance of the communication shielded wire 1, the insulating coating 13 preferably has a relative dielectric constant of 4.0 or less.
  • a polymeric material polyolefins such as polyethylene and polypropylene, polyvinyl chloride, polystyrene, polytetrafluoroethylene, polyphenylene sulfide and the like can be mentioned.
  • the insulating coating 13 may optionally contain an additive such as a flame retardant.
  • the polymer material constituting the insulating coating 13 has molecular polarity It is preferred to use lower ones.
  • a polyolefin which is a nonpolar polymer material such as polypropylene.
  • the polymeric material that constitutes the insulating coating 13 may or may not be foamed.
  • the thickness of the insulating coating 13 is not particularly specified, the thickness of the insulating coating 13 is preferably small from the viewpoint of reducing the outer diameter of the communication shield wire 1 or the like. For example, it may be 0.5 mm or less.
  • the twisted wire pair 10 can be formed by twisting two insulated wires 11 and 11 together.
  • the twist pitch in twisting can be set according to the outer diameter of the insulated wire 11 or the like. However, as the twist pitch is smaller, it is possible to effectively suppress the loosening of the twist structure of the twisted pair wire 10 and obtain stable transmission characteristics.
  • the twist pitch is preferably 30 mm or less, and more preferably 20 mm or less. Alternatively, it is preferable to set the twist pitch to 24 times or less, more preferably 16 times or less of the outer diameter of the insulated wire 11.
  • the shield body 40 directly covers the outer periphery of the twisted pair wire 10, and a tape or the like for holding the twisted structure of the twisted wire pair 10 is not provided.
  • twist around the twisting axis is not added to each insulated wire 11.
  • relative vertical and horizontal directions of each part of the insulated wire 11 centering on the axis of the insulated wire 11 itself do not change along the twisting axis. That is, the part which hits the same position centering on the axis of insulated wire 11 always turns to the same direction, for example, the upper part, etc. in the whole region of twist structure.
  • the change in the distance between the two insulated wires 11 and 11 becomes smaller within one pitch of the twist structure, and the distance between the wires in each portion of the shield wire 1 for communication is reduced. It is possible to suppress the destabilization of the transmission characteristic caused by the change of.
  • the jacket 50 is not necessarily provided on the communication shield wire 1, it is possible to provide the film-like shield 30 and the braided shield 20 which constitute the shield body 40, and the inside twisting.
  • the line 10 can be physically protected.
  • the shield wire 1 for communication is used in a car, it is required to protect the shield wire 1 for communication from the influence of water. It also plays a role of preventing influence on various characteristics of
  • the jacket 50 is made of an insulating material.
  • the insulating material which comprises the jacket 50 has a polymeric material as a main component, and the polymeric material may be what kind of thing.
  • Specific examples of the polymer material include polyolefins such as polyethylene and polypropylene, polyvinyl chloride, polystyrene, polytetrafluoroethylene, polyphenylene sulfide and the like.
  • the jacket 50 may optionally contain an additive such as a flame retardant.
  • the polymer material constituting the jacket 50 has low molecular polarity It is preferable to use for example, among the above listed, it is preferable to use a polyolefin which is a nonpolar polymer material such as polypropylene.
  • the polymeric material making up the jacket 50 may or may not be foamed.
  • the jacket 50 may be made of the same kind of polymeric material as the insulating coating 13 or may be made of different kinds of polymeric materials. From the viewpoint of simplifying the overall configuration and manufacturing process of the communication shielded wire 1, it is preferable to use the same kind of material.
  • the thickness of the jacket 50 may be appropriately determined in consideration of the required protection performance and the like. For example, from the viewpoint of obtaining sufficient protection performance, it can be 0.2 mm or more, and from the viewpoint of preventing the communication shield wire 1 from excessively increasing in diameter, an embodiment of 1.0 mm or less can be exemplified. . Further, the jacket 50 is preferably made of a single-layer insulating material from the viewpoint of the simplicity of the structure, but may be made of a plurality of layers.
  • the jacket 50 preferably directly covers the outer periphery of the inner shield body 40, but a layer made of another material is provided between the two. It is also good.
  • the adhesive layer 33 is provided between the film-like shield 30 and the jacket 50, It is preferable to bond both. Thereby, the processability in the terminal etc. of the shield wire 1 for communication can be improved.
  • the shielded communication wire 1 has the shield body 40 in which two types of shield materials of the braided shield 20 and the film-like shield 30 are laminated. It has high noise shielding properties. Noise shielding properties can be particularly enhanced by laminating the braided shield 20 inside and the film-like shield 30 outside. Further, no other member such as a tape for holding the twisted structure of the twisted wire 10 is provided between the shield 40 and the twisted wire 10, and the shield 40 directly covers the outer periphery of the twisted wire 10 Therefore, the noise shielding property by the shield body 40 is not affected by the interposition of other members between the shield body 40 and the twisted pair wire 10.
  • the noise shielding property of the communication shield wire 1 can be evaluated using the amount of induced noise as an index.
  • the induction noise amount can be measured as the amount of noise coupling from the noise induction wire by causing the communication shield wire 1 to run parallel to the noise induction wire. For example, as shown in a later example, it is preferable that the amount of noise coupling at the time of making noise induction lines run in parallel at an interval of 7 mm is ⁇ 50 dB or less.
  • the communication shield wire 1 has a characteristic impedance in the range of 100 ⁇ 10 ⁇ .
  • the characteristic impedance of 100 ⁇ 10 ⁇ is a value typically required for a wire for Ethernet communication.
  • the characteristic impedance is more preferably within the range of 100 ⁇ 5 ⁇ .
  • the breaking elongation is 7 as the conductor 12 of the insulated wire 11 constituting the twisted wire wire 10.
  • the film-shaped shield 30 can be simply arranged by arranging the film-shaped shield 30 constituting the shield body 40 not in the form of a horizontal winding but in the shape of a vertical garnish.
  • the braided shield 20 is disposed inside and the film shield 30 is disposed outside as the shield body 40 and the jacket 50 is provided on the outside, the longitudinal attachment of the film shield 30 and the extrusion molding of the jacket 50 The process can be carried out simultaneously as a continuous process, and the shield wire 1 for communication becomes excellent in manufacturability.
  • the adhesive layer 33 is provided on the outer surface of the film-like shield 30 and the jacket 50 is adhered, the film-like shield 30 can be removed integrally with the jacket 50. It will be excellent.
  • heat treatment was performed on the obtained conductor.
  • two types of soft copper alloy conductors and hard copper alloy conductors were produced depending on the presence or absence of heat treatment conditions.
  • the heat treatment conditions were a heat treatment temperature of 500 ° C. and a holding time of 8 hours when producing a soft copper alloy conductor.
  • heat treatment was not performed when producing a hard copper alloy conductor.
  • the elongation at break was evaluated according to JIS Z 2241 for the soft and hard copper alloy conductors thus obtained. At this time, the distance between the marks was 250 mm, and the tensile speed was 50 mm / min. As a result of evaluation, the breaking elongation was 7% for the soft copper alloy conductor and 2% for the hard copper alloy conductor.
  • a braided shield and a film-like shield were arranged so as to surround the outer periphery of the obtained twisted pair.
  • the stacking order of the inside and outside was as shown in Table 1.
  • Comparative Examples 1 and 2 only the braided shield and only the film-shaped shield were arranged.
  • the arrangement of the film-like shield was, as shown in Table 1, vertical or horizontal.
  • a tin-plated soft copper wire (0.12 TA) with a diameter of 0.12 mm was used, the number of strokes was 12, the number of supports was 7, and the pitch was 20 mm.
  • the film-like shield one obtained by forming an aluminum film on one side of a PET film (Al-PET) was used. An adhesive layer was provided on the other side of the PET film. As the arrangement direction of the film-like shield, the surface on the aluminum film side was made to face the braided shield.
  • a jacket was formed on the outer periphery of a shield body consisting of a braided shield and a film-like shield by extrusion of polypropylene resin.
  • the thickness of the jacket was 0.4 mm.
  • the characteristic impedance was measured for each communication shield wire. The measurement was performed by the open / short method using an impedance analyzer. The measurement was performed in the frequency range of 300 kHz to 1 GHz, and Table 1 lists measured values at 1 GHz.
  • Example 1 and Example 7 with different lamination order of the braided shield and the film-like shield, and the sets of Example 5 and Example 6 are respectively compared, Examples 1, 2 in which the braided shield is provided inside In the case of 5, the induction noise amount is smaller than in the seventh and sixth embodiments in which the film-like shield is provided inside. From this, it can be seen that higher noise shielding can be obtained by arranging the braided shield inside and the film-like shield outside. Moreover, in this case, the processability of the terminal is excellent, and automatic processing is possible.
  • Example 1 and Example 4 the conductor materials used are different, and in Example 1 in which a soft copper alloy conductor having a breaking elongation of 7% is used, a hard copper alloy conductor having a breaking elongation of 1% is used.
  • the characteristic impedance is lower than that of the fourth embodiment. While the range of 100 ⁇ 5 ⁇ is exceeded in the fourth embodiment, it is within the range in the first embodiment. This indicates that by using a conductor having a breaking elongation of 7% or more, it is possible to prevent an excessive rise in the characteristic impedance and to obtain a characteristic impedance in a predetermined range. It is interpreted that this is because the conductor has a high elongation at break, so that the twisted structure of the twisted pair is stably maintained.
  • the twist pitches of the twisted pair wires are different, and the characteristic impedance becomes smaller and approaches 100 ⁇ as the twist pitches become smaller in the order of Examples 3 and 2. While the range of 100 ⁇ 5 ⁇ is exceeded in the third embodiment, the first and second embodiments fall within the range. This indicates that by setting the twist pitch of the twisted pair wire to 30 mm or less, further 20 mm or less, it is possible to prevent an excessive rise in the characteristic impedance and to obtain a characteristic impedance in a predetermined range. This is interpreted as reducing the twisting pitch to stably hold the twisted structure of the twisted pair.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Insulated Conductors (AREA)
  • Communication Cables (AREA)

Abstract

L'invention concerne un câble de communication blindé ayant une excellente propriété de blindage contre le bruit. Ce câble de communication blindé 1 comprend : un fil à paire torsadée 10 dans lequel une paire de fils isolés 11 comprenant chacun des conducteurs 12 et un revêtement d'isolation 13 qui recouvre la circonférence externe des conducteurs 12 sont torsadés ensemble ; une tresse de blindage 20 ; et un blindage de type film 30 ayant un film métallique, la tresse de blindage 20 et le blindage de type film 30 étant empilés l'un sur l'autre pour recouvrir ainsi directement la circonférence externe du fil à paire torsadée 10. Le blindage de type film 30 peut être disposé à l'extérieur de la tresse de blindage 20.
PCT/JP2017/033779 2017-09-19 2017-09-19 Câble de communication blindé WO2019058437A1 (fr)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021209553A1 (fr) 2020-04-16 2021-10-21 Leoni Kabel Gmbh Câble pour la transmission électrique de données
US20220189660A1 (en) * 2019-03-13 2022-06-16 Autonetworks Technologies, Ltd. Shielded communication cable
DE102023106767A1 (de) 2022-03-23 2023-09-28 Sumitomo Electric Industries, Ltd. Geschirmtes twisted-pair-kabel
EP4297047A1 (fr) * 2022-06-20 2023-12-27 Yazaki Corporation Câble duplex torsadé blindé, et faisceau de câbles
EP4297048A1 (fr) * 2022-06-20 2023-12-27 Yazaki Corporation Câble duplex torsadé blindé, et faisceau de câbles

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0424226U (fr) * 1990-06-22 1992-02-27
JP2010287355A (ja) * 2009-06-10 2010-12-24 Yazaki Corp 高速伝送ケーブル
JP6075490B1 (ja) * 2016-03-31 2017-02-08 株式会社オートネットワーク技術研究所 通信用シールド電線

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0424226U (fr) * 1990-06-22 1992-02-27
JP2010287355A (ja) * 2009-06-10 2010-12-24 Yazaki Corp 高速伝送ケーブル
JP6075490B1 (ja) * 2016-03-31 2017-02-08 株式会社オートネットワーク技術研究所 通信用シールド電線

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220189660A1 (en) * 2019-03-13 2022-06-16 Autonetworks Technologies, Ltd. Shielded communication cable
WO2021209553A1 (fr) 2020-04-16 2021-10-21 Leoni Kabel Gmbh Câble pour la transmission électrique de données
DE102020110370A1 (de) 2020-04-16 2021-10-21 Leoni Kabel Gmbh Kabel zur elektrischen Datenübertragung
DE102023106767A1 (de) 2022-03-23 2023-09-28 Sumitomo Electric Industries, Ltd. Geschirmtes twisted-pair-kabel
EP4297047A1 (fr) * 2022-06-20 2023-12-27 Yazaki Corporation Câble duplex torsadé blindé, et faisceau de câbles
EP4297048A1 (fr) * 2022-06-20 2023-12-27 Yazaki Corporation Câble duplex torsadé blindé, et faisceau de câbles

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