WO2017198317A1 - Câble et procédé de fabrication d'un tel câble - Google Patents

Câble et procédé de fabrication d'un tel câble Download PDF

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Publication number
WO2017198317A1
WO2017198317A1 PCT/EP2016/061487 EP2016061487W WO2017198317A1 WO 2017198317 A1 WO2017198317 A1 WO 2017198317A1 EP 2016061487 W EP2016061487 W EP 2016061487W WO 2017198317 A1 WO2017198317 A1 WO 2017198317A1
Authority
WO
WIPO (PCT)
Prior art keywords
cable
conductive layers
foil
contact points
insulating layer
Prior art date
Application number
PCT/EP2016/061487
Other languages
German (de)
English (en)
Inventor
Arno FRAHMANN
Bernd Janssen
Hermann PLAGGENBORG
Original Assignee
Leoni Kabel Gmbh
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 Leoni Kabel Gmbh filed Critical Leoni Kabel Gmbh
Priority to EP16728631.9A priority Critical patent/EP3459088B1/fr
Priority to PCT/EP2016/061487 priority patent/WO2017198317A1/fr
Publication of WO2017198317A1 publication Critical patent/WO2017198317A1/fr

Links

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
    • H01B11/10—Screens specially adapted for reducing interference from external sources
    • H01B11/1008—Features relating to screening tape per se

Definitions

  • the invention relates to a cable, in particular a data cable, and a method for producing such.
  • a respective core consists of the actual conductor, for example, a solid conductor wire or a stranded conductor, which is surrounded in each case by an insulation.
  • the wire pair of a respective data line is surrounded by a (pair) shielding and a data cable typically has a plurality of such shielded wire pairs.
  • These core pairs are additionally often surrounded by a common outer shield and a common cable sheath.
  • Such data cables are used for high-speed data transmission and are designed for data rates of greater than 5 Gbit / s, in particular for use at frequencies from 14 GHz.
  • the outer shield is primarily important for the EMC and the EMI properties, it typically carries no signals.
  • the respective shielding of a single data line determines the symmetry and the transmission properties of the respective pair of wires.
  • the shield of a respective data line is formed, for example, as a longitudinally folded foil shield.
  • a screen foil is used, which is folded in a longitudinal direction of the cable running around the pair of wires, wherein the two ends overlap in an overlap region which extends in the longitudinal direction.
  • the shielding foil used for the shielding is typically a multilayered foil of at least one conductive layer, ie a conductive layer, and an insulating layer, ie an insulating layer.
  • the conductive layer is usually an aluminum layer and the insulating layer is a PET film.
  • the PET film is formed, for example, as a carrier on which a metallic coating is applied to form the conductive layer, so that the screen film as a whole is a so-called laminated film.
  • the cable is designed in particular as a data cable, in particular for high-speed data transmission for data rates greater than 5 G bit / s and / or for use at frequencies from 14 GHz.
  • the cable has a cable core, which is surrounded by a shielding film, which has an insulating layer on which on both sides, namely on an upper side and on a lower side, in each case a conductive layer is applied.
  • the two conductive layers are electrically conductively connected through the insulating layer.
  • An advantage of the invention is, in particular, that the connection of the two conductive layers to one another effectively avoids resonance effects.
  • the formation of a series resonance by the screen foil is effectively avoided.
  • Such a series resonance arises in conventional screen films in that the two conductive layers of the screen film do not touch, i. are not connected to each other and therefore no continuous shielding is realized. This also applies in the case of a screen foil with only one conductive layer, which is then not contacted with itself when surrounding the cable core.
  • the special shielding foil as a whole forms a closed shielding, along which an induced current can propagate essentially arbitrarily and in a particularly favorable manner and, in particular, without resistance.
  • a pure metal foil as the shielding foil in order to realize a closed shielding.
  • the screen foil then has only one conductive layer and no insulating layer.
  • the conductive layer is optimal with itself both during rewinding and during longitudinal folding contacted and forms a closed shield.
  • a pure metal foil is mechanically less robust and there is a risk of breakage and generally damage, especially during the manufacture of the cable.
  • Significantly more stable and also easier to produce compared to a screen foil with an insulating layer which then gives the screen a total of a higher mechanical stability.
  • the cable core has at least one core, but usually several wires.
  • the cable core is a core pair with two wires, which together with the shielding film form a shielded line, in particular data line of the cable.
  • the wires of the line are either parallel to each other or twisted together.
  • the cable itself has in one embodiment a plurality of such separately shielded lines.
  • the screen foil serves to form a shielding of a line, in principle, however, the underlying concept is also advantageously applicable to an external shielding of the entire cable.
  • the screen foil is arranged around several lines of the cable and forms an outer shield.
  • the shielding foil is alternatively a Batschir- the cable and surrounds all the wires and / or cables of the cable.
  • the shielding formed by the shielding foil preferably consists only of the one shielding foil and otherwise has no further shielding foils.
  • the cable core, in particular the conduit is surrounded by only one shielding foil.
  • On a multi-layered structure with multiple slides is therefore omitted.
  • Such a configuration is particularly advantageous in the shielding of individual wires or wire pairs for the purpose of forming lines.
  • a braid screen is also arranged.
  • the insulating layer is generally made of an insulating material, e.g. a plastic, preferably PET.
  • the conductive layers are each generally made of a conductive material, e.g. a metal, preferably aluminum.
  • the conductive layers extend flat on the top and bottom of the insulating layer, so that in the finished cable, the one conductive layer, namely on the bottom, with respect to the insulating layer inside and the other conductive layer outside.
  • the conductive layers are glued to the insulating layer, for example.
  • the conductive layers are particularly substantially continuous, i. Cover the insulating layer substantially completely. In this case, "substantially completely" means, in particular, that the conductive layer covers at least 90%, preferably at least 99%, of the insulating layer, particularly preferably the entire insulating layer.
  • the two conductive layers are contacted with each other directly through the insulating layer.
  • This embodiment is particularly simple, since it dispenses with additional components or structures for connecting the two conductive layers. Rather, the conductive layers are directly, i. in direct contact with each other, thus touching each other.
  • the insulating layer is omitted or displaced in certain areas, so that the two conductive layers are connected through the insulating layer. In this way, a direct contact of the two conductive layers is formed.
  • the joining of the two conductive layers requires in particular no other material.
  • the two conductive layers are interconnected by means of a plurality of contact points.
  • the conductive layers are furthermore advantageously substantially flat and, in particular, also continuous, ie substantially uninterrupted.
  • the insulating layer is broken or interrupted, but the conductive layers are not necessarily interrupted.
  • a respective contact point is an electrical connection between the two conductive layers locally larra.
  • the two conductive layers are still spaced apart and insulated by the insulating layer. Due to the plurality of contact points, which are arranged distributed over the screen foil, then a uniform electrical connection is realized, which allows a plurality of current paths along the shield, whereby resonance effects are particularly effectively avoided.
  • the contact points preferably make up less than 1 to 10% of the total area of the shielding foil, so that the shielding foil, in spite of the contact points, is still substantially a multilayer foil with conducting layers spaced apart by an insulating layer.
  • embodiments are also suitable in which the contact points make up more than 10% of the total area.
  • the shielding film is applied in any case in the finished cable such that the covered cable core is optically covered. This is understood to mean that the film overlaps itself in overlapping areas, specifically in such a way that as few as possible, preferably no contact locations, lie one above the other.
  • an optically dense shielding is formed in which the cable core is concealed at any point by at least one conductive layer.
  • a single pad preferably has a dimension in the range between 0.05 and 0.5 mm, i. is about as wide and / or long as the screen film is thick overall.
  • other dimensions are basically also conceivable and suitable.
  • the contact points are thus not large-area structures which occupy a substantial proportion of the area of the screen foil, but rather structures with particularly small dimensions, which do not significantly affect the external appearance of the screen foil as such with substantially continuous conducting layers. Nevertheless, the contact points are usually visible to the naked eye.
  • the contact points are arranged in a pattern and at regular intervals from each other. This achieves a particularly homogeneous and controlled contacting, ie the electrical properties of the shielding mung are particularly even along the cable.
  • the shielding film in particular surrounds a pair of wires, the pattern is then designed such that the greatest possible common-mode rejection results.
  • the distance of the contact points from one another is expediently set as a function of the intended transmission frequency at which the cable is to be operated.
  • the contact points are arranged in lattice in rows and columns, with the rows perpendicular to the columns, giving the visual impression that the contact points are located on corners of imaginary squares, that is, on a rectangular grid.
  • every other row is offset by half the distance between two adjacent contact points, resulting in the visual impression that the contact points are arranged on corners of imaginary diamonds, ie in a skewed grid.
  • the distance between two contact points to each other i. in particular the distance of a contact point to its nearest neighbor, is preferably between 0.1 to 4 mm.
  • the resulting cable is then particularly suitable as a data cable and for data transmission at data rates greater than 5 G bit / s or at frequencies above 14 GHz.
  • the conductive layers are pressed against one another at the contact points in a configuration that is particularly suitable for direct contacting, ie in particular are connected to one another in a form-fitting manner.
  • the shielding film is accordingly prepared in such a way that locally, namely at the contact points, the insulating layer interrupted, displaced or destroyed and is broken as a result, so that the two conductive layers are interconnected.
  • a positive connection is realized such that at least one of the conductive layers, preferably both conductive layers, engages or intervenes in the interrupted insulating layer.
  • the screen foil is perforated to form the contact points.
  • a perforation is particularly easy to perform, so that the cable is particularly easy to manufacture.
  • the two conductive layers are pressed against each other and broken through so that a connection through the insulating layer is carried out.
  • the shielding film thus has a perforation which forms the contact points.
  • it is at least locally perforated in the area of the contact pads to be formed, e.g. punched or pressed.
  • a perforating unit known per se is particularly suitable.
  • the specific shape and geometry of the connection differs at different contact points in detail, i. especially on a microscopic scale, sometimes strong. This is due in particular to the manufacturing process for the contact points. For example, when perforating the screen foil locally destroyed in a not completely reproducible manner. The contact points generated then sometimes have a different connection quality. Due to the large number of contact points, however, it is advantageously ensured that, on a statistical average, sufficient electrical contacting of the two layers is formed.
  • the contact points are point-shaped or slot-shaped and are therefore particularly small in size and correspondingly Space-saving trained.
  • the shielding foil is therefore only locally limited by the contact points, while the majority of the shielding foil, ie in particular at least 90%, preferably at least 99% of the total area, remain unaffected and correspondingly intact or undamaged, ie with an intact insulating layer which spaces the conducting layers and isolated against each other.
  • perforation punctiform contact points are made for example by means of a needle, slot-shaped contact points, for example by means of a knife.
  • a laser method is also suitable.
  • the shielding film has an open area, in particular a side edge, in which the two conductive layers are electrically separated from one another, in particular continuously through the insulating layer.
  • the screen foil is free of contact points, i. the two conductive layers are not interconnected in the open area.
  • the insulating layer is not broken.
  • the free area extends for this purpose along the entire screen foil.
  • the free area in particular has a dimension which is significantly greater than the distance between the contact points.
  • the free area is arranged on the edge of the screen foil.
  • the clearance is not located at the edge, but runs e.g. center.
  • the screen foil has several free areas.
  • a longitudinal fold in which the shielding foil is wrapped around the cable core such that the lateral edges of the shielding foil extend in the longitudinal direction of the cable.
  • a wrapping also referred to as banding, in which the screen foil helically around the cable core spun or wrapped around. Both versions are basically executable with overlap or on impact.
  • the additional film makes the cable less flexible, more expensive to manufacture, and possibly the material of the film has an unfavorable effect on the electrical properties of the cable.
  • the commonly used polyester is only poor for high frequency applications, i. in particular data transmission, suitable.
  • each with its own form device for applying the screen film is necessary for different cable structures and dimensions, so that there is also a high production cost.
  • the shielding film is preferably spun around the cable core.
  • a cable for data transmission cable is unsuitable due to the resonance effects generated by the wrapping at a certain frequency.
  • this effect is so greatly reduced or even completely avoided that a wrapping for a corresponding cable is meaningfully possible, especially for a cable for data transmission at more than 5 Gbit / s or at frequencies greater than 14 GHz.
  • this also builds up under certain circumstances lower than in a longitudinal folding, the shielding is thus thinner overall. Even in cases where the screen foil is spun so as to give a thicker shield than a longitudinal fold, the spun screen foil is still more flexible.
  • the asymmetry due to the longitudinal edge in the longitudinal folding is inherently avoided, so that in particular special is also dispensed with an additional film as a substructure.
  • the structure of the shield is thus particularly simple.
  • An expensive and in particular cable structure-dependent molding device for the film is advantageously not necessary, but can be different cable structures realized in a simple manner.
  • a spinning unit used for spinning can be used particularly flexibly.
  • a perforation unit for online connection of the two conductive layers can be integrated particularly easily into the spinning unit.
  • the screen foil is typically arranged in several successive windings around the cable core.
  • the windings are either made on impact or overlap in an overlap area.
  • the cable core comprises a number of wires, i. has a number of wires which are directly surrounded by the screen foil.
  • the shielding foil lies against the wires and the inward-pointing conductive layer touches the wire jacket or the conductor sheaths. An additional film between the wires and the screen foil is therefore dispensed with.
  • the cable core of the cable is a pair of wires, which is then formed by means of the shielding foil as a shielded line and in particular as a data line.
  • the cable then includes one or more such conduits.
  • the cable core has an inner conductor for a coaxial cable, wherein the inner conductor is surrounded by a dielectric, which in turn is surrounded by the screen foil.
  • the cable core thus consists of the inner conductor and the dielectric.
  • the screen foil then forms an outer conductor of the coaxial cable.
  • a cable core is surrounded with a screen foil on which is applied on both sides, namely on an upper side and on a lower side, in each case a conductive layer, wherein the two conductive layers are electrically conductively connected through the insulating layer.
  • the conductive layers are connected to each other during the manufacture of the cable.
  • the two conductive layers are preferably connected to one another by perforating the screen film.
  • a corresponding perforation is produced by means of a perforating unit, to which the screen foil is fed.
  • a perforating unit is particularly easy to integrate into a spinning unit for wrapping or banding. Therefore, in an advantageous embodiment, the screen foil is perforated and the cable core is wound with the screen foil.
  • Such a method is particularly flexible, especially with regard to different cable configurations, geometries and dimensions.
  • the conductive layers are connected to each other immediately before surrounding the cable core.
  • the method is thus first supplied as a semi-finished a simple shielding film with non-connected conductive layers, preferably a conventional double-laminated film. This is then prepared in the following by first connecting the conductive layers to one another. Immediately following the bonding of the conductive layers, e.g. by means of perforation, the screen foil is then spun onto the cable core. In other words, surrounding the cable core takes place in a common method step with the connection of the conductive layers. In an advantageous variant, the screen foil is subsequently perforated, i. after wrapping the cable core.
  • 2 shows the cable in another cross-sectional view
  • 3 shows a detail of a screen foil for the cable in a perspective view
  • Fig. 6 shows a manufacturing method for the cable.
  • a cable 2 is shown in cross section transversely to the longitudinal direction L schematically.
  • the cable 2 is designed here as a data cable and has as a cable core 4 two wires 6, which form a pair of wires 8. This is surrounded by a screen foil 10, so that a total of the pair of wires 8 and the screen 10, a shielded line 12, here data line, is formed.
  • the cable 2 has a plurality of such lines 12.
  • the cable 2 has an outer jacket 14, which surrounds the wires 6.
  • an adhesive film is spun on.
  • the illustration in Fig. 1 is only schematic and does not necessarily depict the individual components of the cable 2 in the correct size ratio to each other.
  • the screen foil 10 has a thickness D in the range of about 0.1 to 0.5 mm.
  • the diameter of a single wire 6, however, is e.g. between 0.5 and 3 mm.
  • the cable 2 is shown in a cross-sectional view along the longitudinal direction L.
  • the shielding foil 10 is spun on in the exemplary embodiment shown.
  • Such a braiding is basically preferred, but alternatively, instead of a braiding, a longitudinal folding of the screen foil 10 around the wires 6 is also conceivable, with a folding edge then running in the longitudinal direction L.
  • the spun-on screen foil 10 is helically guided around the cable core 4 and arranged in a plurality of successive windings which overlap in a correspondingly helical overlap region 16. In a variant, not shown, however, the screen foil 10 is wound on impact.
  • the shielding foil 10 forms a shielding for the line 12 and thus decisively determines the transmission properties of the line 12 and thus of the cable 2 in total.
  • the shielding foil 10 is specially designed.
  • the special embodiment can be seen particularly clearly in Fig. 3, which shows a detail of a portion of the screen 10 in a perspective view.
  • the screen film 10 is a multilayer film, with an insulating layer 18, on which both sides, namely on an upper side O and on a lower side U, in each case a conductive layer 20, 22 is applied, namely an upper conductive layer 20, which in the finished Cable 2 points outward, and a lower conductive layer 22, which points in the finished cable 2 inwards.
  • the insulating layer 18 is thus arranged between the two conductive layers 20, 22.
  • the conductive layers 20, 22 are made of a conductive material, eg, aluminum, and the insulating layer 18 is made of an insulating material, eg, PET.
  • the shielding film 10 is a double-laminated film in which the conductive layers 20, 22 are adhesively bonded on one side of the insulating layer 18.
  • the two conductive layers 20, 22 are not interconnected, i. also not electrically connected to each other, resulting in the finished cable 2 usually unfavorable resonance effects, especially when operating at high frequencies in the range above 14 GHz.
  • This is prevented in the case of the shielding film 10 shown here in that the two conductive layers 20, 22 are connected to one another, namely through the insulating layer 18.
  • the connection leads to an electrical contacting of the conductive layers 20, 22 with each other, so that both are at the same electrical potential and a current can propagate on both sides of the shielding foil 10 largely unhindered, even in the spun-on arrangement as shown in FIG ,
  • the conductive layers 20, 22 are interconnected by a plurality of contact pads 24.
  • the specific design of the contact points 24 does not necessarily correspond to the only highly schematic representation and FIG. 3, but actually differs greatly under certain circumstances. It is essential that at the contact points 24, the insulating layer 18 is broken, interrupted Chen or displaced and are thus formed in these recesses, in which material of the conductive layers 20, 22 penetrates and in this way the two conductive layers 20, 22 together.
  • the conductive layers 20, 22 are connected in a particularly simple and preferred embodiment in that the shielding film 10 is perforated. In principle, however, other methods are also suitable for connecting the conductive layers 20, 22.
  • the shielding film 10 shown in FIG. 3 is perforated, in the present case punctiform, so that the contact points 24 are each punctiform.
  • the insulating layer 18 is broken through and the material of the upper conductive layer 20 penetrates through the insulating layer 18 and contacts the lower conductive layer 22.
  • a plurality of holes in the shielding film 10 are formed, alternatively Other geometries suitable, such as slots, ie slit-shaped contact points 24.
  • the contact points 24 in Fig. 3 form a pattern in which the contact points 24 are spaced from each other evenly at intervals A1, A2.
  • Two suitable patterns are shown schematically in Figures 4 and 5.
  • the contact points 24 are arranged in a grid in rows and columns, wherein the rows are perpendicular to the columns. This gives the visual impression that the contact points 24 are arranged on corners of imaginary squares Q, ie on a rectangular grid.
  • every other row is offset by half the distance A1 between two adjacent contact points 24. This results in the visual impression that the contact points 24 are arranged on corners of imaginary diamonds R, ie in a skewed grid.
  • the two conductive layers 20, 22 are also distributed evenly over the total area of the screen 10 is connected to each other.
  • An exception to this is an open area 26, which here is at the same time a side edge of the screen foil 10.
  • the cable core 4 and the shielding film 10 are fed to a spinning unit 28, by means of which the cable core 4 is wound or wrapped around the shielding film 10.
  • a spinning unit 28 is particularly flexible with respect to the concrete design, dimensioning and geometry of the cable core 4.
  • the shielding film 10 is first fed as a semi-finished product, i. without connected conductive layers 20, 22. These are first connected to one another in a perforation unit 30. 6, the perforation unit 30 is integrated into the spinning unit 28, so that the perforation and thus the contacting of the conductive layers 20, 22 takes place only immediately before the cable core 4 is wound over.

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

Abstract

L'invention concerne un câble ainsi qu'un procédé de fabrication d'un tel câble. L'invention vise à améliorer les propriétés de transmisson. A cet effet, le câble est muni d'une feuille de blindage spéciale.
PCT/EP2016/061487 2016-05-20 2016-05-20 Câble et procédé de fabrication d'un tel câble WO2017198317A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP16728631.9A EP3459088B1 (fr) 2016-05-20 2016-05-20 Câble et procédé de fabrication d'un tel câble
PCT/EP2016/061487 WO2017198317A1 (fr) 2016-05-20 2016-05-20 Câble et procédé de fabrication d'un tel câble

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/061487 WO2017198317A1 (fr) 2016-05-20 2016-05-20 Câble et procédé de fabrication d'un tel câble

Publications (1)

Publication Number Publication Date
WO2017198317A1 true WO2017198317A1 (fr) 2017-11-23

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PCT/EP2016/061487 WO2017198317A1 (fr) 2016-05-20 2016-05-20 Câble et procédé de fabrication d'un tel câble

Country Status (2)

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EP (1) EP3459088B1 (fr)
WO (1) WO2017198317A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109065233A (zh) * 2018-07-25 2018-12-21 河南师范大学 方形多股内屏蔽信号线

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080314636A1 (en) * 2007-06-19 2008-12-25 Yazaki Corporation Multi-layer shielded wire
WO2015075208A1 (fr) * 2013-11-25 2015-05-28 Leoni Kabel Holding Gmbh Ligne de données et procédé de production d'une ligne de données

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE427514B (sv) * 1979-05-25 1983-04-11 Thomas & Betts Corp Forfarande och anordning for anslutning av en forsta bandkabel med inbordes isolerade ledare till en andra bandkabel med inbordes isolerade ledare

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080314636A1 (en) * 2007-06-19 2008-12-25 Yazaki Corporation Multi-layer shielded wire
WO2015075208A1 (fr) * 2013-11-25 2015-05-28 Leoni Kabel Holding Gmbh Ligne de données et procédé de production d'une ligne de données

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109065233A (zh) * 2018-07-25 2018-12-21 河南师范大学 方形多股内屏蔽信号线

Also Published As

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EP3459088A1 (fr) 2019-03-27
EP3459088B1 (fr) 2022-08-10

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