EP0759624A1 - Electrical telecommunications cable - Google Patents

Electrical telecommunications cable Download PDF

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Publication number
EP0759624A1
EP0759624A1 EP96104781A EP96104781A EP0759624A1 EP 0759624 A1 EP0759624 A1 EP 0759624A1 EP 96104781 A EP96104781 A EP 96104781A EP 96104781 A EP96104781 A EP 96104781A EP 0759624 A1 EP0759624 A1 EP 0759624A1
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EP
European Patent Office
Prior art keywords
cable
screen
shielding
foils
cable according
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP96104781A
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German (de)
French (fr)
Inventor
Manfred Dipl.-Ing. Obermeier
Ferdinand Grögl
Reinhold Göblmaier
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Nexans Deutschland GmbH
Original Assignee
Alcatel Kabel AG and Co
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 Alcatel Kabel AG and Co filed Critical Alcatel Kabel AG and Co
Publication of EP0759624A1 publication Critical patent/EP0759624A1/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • 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
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
    • H01B13/2613—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
    • H01B13/262—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping of an outer metallic screen

Definitions

  • the invention relates to an electrical cable for transmitting messages, in which at least one transmission element consisting of insulated electrical conductors is arranged in a cable core, in which the cable core is surrounded by a metallic screen and in which a jacket made of insulating material is fitted over the screen.
  • Such cables or lines are used, for example, in data technology, in open-loop and closed-loop control technology or in general in communications technology.
  • These cables are equipped with a metallic shield or a metallic shield to protect the transmission paths against external interference fields.
  • the shield also prevents interference radiation from such a cable.
  • a dense shield is required, which must also be effective in areas of more than 100 MHz, for example for data cables.
  • umbrellas consist, for example, of braids or ropes made of copper wires. Such umbrellas are no longer leakproof even at double frequencies at higher frequencies. Their application to the cable core is also complex. Shields designed as closed tubes, such as those used for high-frequency cables, are also expensive to manufacture. Cables equipped with it are also stiff.
  • the invention has for its object to develop the above-mentioned cable so that it is tightly shielded with simple manufacture even at very high frequencies.
  • This cable can be produced in a simple manner using machines which are customary in cable technology.
  • the two shield foils and the jacket can be molded around the cable core in one operation.
  • the cable then has a two-layer shield, the two layers of which, apart from the very narrow gaps at the overlap points, are each individually tubular. Both layers are therefore already suitable as umbrellas.
  • the offset of the overlap points of both shielding foils in the circumferential direction results overall in an effective shielding of the cable core even at very high frequencies, since the narrow gap remaining in the two layers of the shield in the respective overlap point is covered by the respective other layer.
  • the metallic strips used for the shielding foils can be made very thin so that the cable remains bendable.
  • the two shielding foils not only protect the cable core from an electromagnetic point of view, they are also an effective diffusion barrier for moisture.
  • an insulating intermediate layer is applied between the two screen films.
  • a screen constructed in this way has a low screen attenuation or a high coupling resistance, in particular at very high frequencies. If the two shielding films are firmly connected to one another via the intermediate layer, the result is a kind of sandwich construction, which prevents the screen from kinking when the cable is bent, for example, when it is wound on a spool.
  • the electrical communication cable K shown in cross section in FIG. 1 - hereinafter referred to as "cable K" - has four transmission elements 1, each of which is designed as a wire with an insulated metallic conductor.
  • the conductors are preferably made of copper.
  • a metallic screen 2 is attached over the cable core S formed by the transmission elements 1. It consists of copper or aluminum, for example. Its more precise structure is shown in FIG. 2.
  • the screen 2 is surrounded by a jacket 3 made of insulating material, which consists for example of polyethylene or polyvinyl chloride.
  • the screen 2 has two screen films 4 and 5, between which an insulating intermediate layer 6 is shown, dotted.
  • Both shielding foils 4 and 5 consist of metallic strips which have been formed lengthwise around the cable core S. They have overlap points 7 and 8 which run in the longitudinal direction of the cable K and are offset in relation to one another in the circumferential direction.
  • the overlap points 7 and 8 lie diametrically opposite one another. They are then offset from each other by 180 °.
  • the two screen films 4 and 5 can be firmly connected to one another in the finished screen 2 by the intermediate layer 6.
  • Bare aluminum or copper strips can be used as strips for the shielding foils 4 and 5.
  • the tapes can be between 25 ⁇ m and 150 ⁇ m thick. Tapes coated with a plastic can also be used on one side. The coated sides of such tapes can face each other in the finished cable or in the screen 2.
  • the bands can also be arranged so that only one layer lies between them, while the other layer is then arranged outside. The coating or coatings then form or form the intermediate layer 6.
  • Two strips, of which only one is coated with plastic can also be used for the screen foils 4 and 5. In the overlap points 7 and 8 of uncoated strips, bare metal lies against one another.
  • the intermediate layer 6 can also consist of a plastic film attached between the two screen films 4 and 5.
  • the plastic of the intermediate layer 6 can be designed as an adhesion promoter.
  • a copolymer of ethylene is suitable for this, for example. It becomes effective through the application of heat. The heat required for this is generated, for example, when the jacket 3 is applied.
  • a plastic film can be wrapped around the screen films 5. This is particularly advantageous if the two screen foils 4 and 5 are not firmly connected to one another.
  • a metallic drain wire can be assigned to each of the two shield foils 4 and 5, which runs over the entire length of the cable K and lies against the respective shield foil.
  • a drain wire can be, for example, a tinned copper wire.
  • the cable K according to FIG. 1 is produced according to FIG. 3, for example as follows:
  • a first metallic band 11 coming from a coil 10 is formed into the shielding film 4 with the overlap point 7 in a shaping device 9.
  • the cable core S and all layers applied to the same are moved in the direction of arrow P by the system according to FIG. 3.
  • the first band 11 is coated on one side with an adhesion promoter. This layer lies on the outside of the shielding film 4.
  • a second metallic band 13 is formed around the shielding film 4 in a shaping device 12 to form the shielding film 5 with the overlap point 8, which is pulled off from a coil 14.
  • the tape 13 is also coated on one side with an adhesion promoter. This layer lies inside the shielding film 5.
  • the sheath 3 is then applied to the screen 2 of the cable K thus formed from the two bands 11 and 13 by means of an extruder 15. The heat generated thereby activates the adhesion promoter of the two bands 11 and 13, so that the two screen foils 4 and 5 are firmly connected to one another.
  • the finished cable K can then be wound up on a spool.

Abstract

The cable has an insulated conductor as a transfer element in at least one cable strand enclosed by a metal screen (2), whereby the metal screen is enclosed by an insulating casing. The metal screen consists of two metal foils (4,5) made of metal strip with one arranged on the other with an overlap to form a tube extending in the longitudinal direction of the cable. The overlapping points (7,8) of the two screen foils are offset wrt. each other by 180 degrees in the peripheral direction. An intermediate insulating layer can be arranged between the two screen foils.

Description

Die Erfindung bezieht sich auf ein elektrisches Kabel zur Nachrichtenübertragung, bei welchem in einer Kabelseele mindestens ein aus isolierten elektrischen Leitern bestehendes Übertragungselement angeordnet ist, bei welchem die Kabelseele von einem metallischen Schirm umgeben ist und bei welchem über dem Schirm ein Mantel aus Isoliermaterial angebracht ist.The invention relates to an electrical cable for transmitting messages, in which at least one transmission element consisting of insulated electrical conductors is arranged in a cable core, in which the cable core is surrounded by a metallic screen and in which a jacket made of insulating material is fitted over the screen.

Derartige Kabel bzw. Leitungen werden beispielsweise in der Datentechnik, in der Steuer- und Regeltechnik oder allgemein in der Nachrichtentechnik eingesetzt. Diese Kabel sind mit einer metallischen Abschirmung bzw. einem metallischen Schirm zum Schutz der Übertragungswege gegen äußere Störfelder ausgerüstet. Der Schirm verhindert aber auch von einem solchen Kabel ausgehende Störstrahlungen. In allen Fällen ist ein dichter Schirm erforderlich, der beispielsweise bei Datenkabeln auch in Bereichen von mehr als 100 MHz wirksam sein muß.Such cables or lines are used, for example, in data technology, in open-loop and closed-loop control technology or in general in communications technology. These cables are equipped with a metallic shield or a metallic shield to protect the transmission paths against external interference fields. The shield also prevents interference radiation from such a cable. In all cases, a dense shield is required, which must also be effective in areas of more than 100 MHz, for example for data cables.

Bekannte Schirme bestehen beispielsweise aus Geflechten oder Umseilungen aus Kupferdrähten. Solche Schirme sind auch bei doppellagiger Ausführung bei höheren Frequenzen nicht mehr dicht. Ihre Aufbringung auf die Kabelseele ist außerdem aufwendig. Als geschlossene Rohre ausgeführte Schirme, wie sie beispielsweise bei Hochfrequenzkabeln eingesetzt werden, sind fertigungstechnisch ebenfalls aufwendig. Damit ausgerüstete Kabel sind außerdem steif.Known umbrellas consist, for example, of braids or ropes made of copper wires. Such umbrellas are no longer leakproof even at double frequencies at higher frequencies. Their application to the cable core is also complex. Shields designed as closed tubes, such as those used for high-frequency cables, are also expensive to manufacture. Cables equipped with it are also stiff.

Der Erfindung liegt die Aufgabe zugrunde, das eingangs geschilderte Kabel so weiterzubilden, daß es bei einfacher Fertigung auch bei sehr hohen Frequenzen dicht geschirmt ist.The invention has for its object to develop the above-mentioned cable so that it is tightly shielded with simple manufacture even at very high frequencies.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst,

  • daß der Schirm aus zwei übereinander liegenden, aus metallischen Bändern geformten Schirmfolien besteht, die beide mit einer in Längsrichtung des Kabels verlaufenden Überlappungsstelle zum Rohr geformt sind und
  • daß die Überlappungsstellen der beiden Schirmfolien in Umfangsrichtung gegeneinander versetzt sind.
According to the invention, this object is achieved by
  • that the screen consists of two superimposed screen foils formed from metallic strips, both of which are formed with an overlap point extending in the longitudinal direction of the cable to the tube and
  • that the overlap points of the two screen films are offset from one another in the circumferential direction.

Dieses Kabel ist mit in der Kabeltechnik üblichen Maschinen auf einfache Weise herstellbar. Die beiden Schirmfolien und der Mantel können in einem Arbeitsgang um die Kabelseele herumgeformt werden. Das Kabel hat dann einen zweischichtigen Schirm, dessen beide Schichten bis auf sehr schmale Spalte an den Überlappungsstellen jede für sich rohrförmig geschlossen ist. Beide Schichten sind daher jede für sich bereits als Schirm geeignet. Durch den Versatz der Überlappungsstellen beider Schirmfolien in Umfangsrichtung ergibt sich insgesamt eine auch bei sehr hohen Frequenzen wirksame Abschirmung der Kabelseele, da der in den beiden Schichten des Schirms in der jeweiligen Überlappungsstelle verbleibende schmale Spalt durch die jeweils andere Schicht abgedeckt wird. Die für die Schirmfolien verwendeten metallischen Bänder können sehr dünn ausgeführt werden, so daß das Kabel gut biegbar bleibt. Die beiden Schirmfolien schützen die Kabelseele nicht nur in elektromagnetischer Hinsicht, sondern sie sind auch eine wirksame Diffusionssperre für Feuchtigkeit.This cable can be produced in a simple manner using machines which are customary in cable technology. The two shield foils and the jacket can be molded around the cable core in one operation. The cable then has a two-layer shield, the two layers of which, apart from the very narrow gaps at the overlap points, are each individually tubular. Both layers are therefore already suitable as umbrellas. The offset of the overlap points of both shielding foils in the circumferential direction results overall in an effective shielding of the cable core even at very high frequencies, since the narrow gap remaining in the two layers of the shield in the respective overlap point is covered by the respective other layer. The metallic strips used for the shielding foils can be made very thin so that the cable remains bendable. The two shielding foils not only protect the cable core from an electromagnetic point of view, they are also an effective diffusion barrier for moisture.

In bevorzugter Ausführungsform ist zwischen den beiden Schirmfolien eine isolierende Zwischenschicht angebracht. Ein derart aufgebauter Schirm hat insbesondere bei sehr hohen Frequenzen eine niedrige Schirmdämpfung bzw. einen hohen Kopplungswiderstand. Wenn die beiden Schirmfolien über die Zwischenschicht fest miteinander verbunden sind, ergibt sich eine Art Sandwichkonstruktion, durch welche ein Knicken des Schirms verhindert wird, wenn das Kabel beispielsweise beim Aufwickeln auf eine Spule gebogen wird.In a preferred embodiment, an insulating intermediate layer is applied between the two screen films. A screen constructed in this way has a low screen attenuation or a high coupling resistance, in particular at very high frequencies. If the two shielding films are firmly connected to one another via the intermediate layer, the result is a kind of sandwich construction, which prevents the screen from kinking when the cable is bent, for example, when it is wound on a spool.

Weitere vorteilhafte Ausgestaltungen der Erfindung gehen aus den Unteransprüchen hervor.Further advantageous embodiments of the invention emerge from the subclaims.

Ein Ausführungsbeispiel des Erfindungsgegenstandes ist in den Zeichnungen dargestellt.An embodiment of the subject of the invention is shown in the drawings.

Es zeigen:

  • Fig. 1 einen Querschnitt durch ein elektrisches Kabel nach der Erfindung in schematischer Darstellung.
  • Fig. 2 den Schirm des Kabels in vergrößerter Darstellung.
  • Fig. 3 schematisch eine Vorrichtung zur Herstellung des Kabels.
Show it:
  • Fig. 1 shows a cross section through an electrical cable according to the invention in a schematic representation.
  • Fig. 2 shows the screen of the cable in an enlarged view.
  • Fig. 3 shows schematically a device for producing the cable.

Das in Fig. 1 im Querschnitt dargestellte elektrische Nachrichtenkabel K - im folgenden "Kabel K" genannt - hat vier Übertragungselemente 1, die jeweils als Adern mit einem isolierten metallischen Leiter ausgeführt sind. Die Leiter bestehen vorzugsweise aus Kupfer. Über der von den Übertragungselementen 1 gebildeten Kabelseele S ist ein metallischer Schirm 2 angebracht. Er besteht beispielsweise aus Kupfer oder Aluminium. Sein genauerer Aufbau geht aus Fig. 2 hervor. Der Schirm 2 ist von einem Mantel 3 aus Isoliermaterial umgeben, der beispielsweise aus Polyethylen oder Polyvinylchlorid besteht.The electrical communication cable K shown in cross section in FIG. 1 - hereinafter referred to as "cable K" - has four transmission elements 1, each of which is designed as a wire with an insulated metallic conductor. The conductors are preferably made of copper. A metallic screen 2 is attached over the cable core S formed by the transmission elements 1. It consists of copper or aluminum, for example. Its more precise structure is shown in FIG. 2. The screen 2 is surrounded by a jacket 3 made of insulating material, which consists for example of polyethylene or polyvinyl chloride.

Der Schirm 2 weist gemäß dem in Fig. 2 dargestellten Ausführungsbeispiel zwei Schirmfolien 4 und 5 auf, zwischen denen eine gepunktet eingezeichnete, isolierende Zwischenschicht 6 angeordnet ist. Beide Schirmfolien 4 und 5 bestehen aus metallischen Bändern, die längseinlaufend um die Kabelseele S herumgeformt worden sind. Sie weisen in Längsrichtung des Kabels K verlaufende Überlappungsstellen 7 und 8 auf, die in Umfangsrichtung gegeneinander versetzt sind.According to the exemplary embodiment shown in FIG. 2, the screen 2 has two screen films 4 and 5, between which an insulating intermediate layer 6 is shown, dotted. Both shielding foils 4 and 5 consist of metallic strips which have been formed lengthwise around the cable core S. They have overlap points 7 and 8 which run in the longitudinal direction of the cable K and are offset in relation to one another in the circumferential direction.

In bevorzugter Ausführungsform liegen die Überlappungsstellen 7 und 8 einander diametral gegenüber. Sie sind dann um 180° gegeneinander versetzt. Die beiden Schirmfolien 4 und 5 können im fertigen Schirm 2 durch die Zwischenschicht 6 fest miteinander verbunden sein.In a preferred embodiment, the overlap points 7 and 8 lie diametrically opposite one another. They are then offset from each other by 180 °. The two screen films 4 and 5 can be firmly connected to one another in the finished screen 2 by the intermediate layer 6.

Als Bänder für die Schirmfolien 4 und 5 können blanke Aluminium- oder Kupferbänder verwendet werden. Die Bänder können zwischen 25 µm und 150 µm dick sein. Es können auch einseitig mit einem Kunststoff beschichtete Bänder eingesetzt werden. Die beschichteten Seiten derartiger Bänder können einander im fertigen Kabel bzw. im Schirm 2 zugewandt sein. Die Bänder können aber auch so angeordnet sein, daß nur eine Schicht zwischen denselben liegt, während die andere Schicht dann außen angeordnet ist. Die Beschichtung bzw. Beschichtungen bildet bzw. bilden dann die Zwischenschicht 6. Für die Schirmfolien 4 und 5 können auch zwei Bänder verwendet werden, von denen nur eines mit Kunststoff beschichtet ist. In den Überlappungsstellen 7 bzw. 8 von nicht beschichteten Bändern liegt blankes Metall aneinander. Die Zwischenschicht 6 kann auch aus einer zwischen den beiden Schirmfolien 4 und 5 angebrachten Folie aus Kunststoff bestehen.Bare aluminum or copper strips can be used as strips for the shielding foils 4 and 5. The tapes can be between 25 µm and 150 µm thick. Tapes coated with a plastic can also be used on one side. The coated sides of such tapes can face each other in the finished cable or in the screen 2. The bands can also be arranged so that only one layer lies between them, while the other layer is then arranged outside. The coating or coatings then form or form the intermediate layer 6. Two strips, of which only one is coated with plastic, can also be used for the screen foils 4 and 5. In the overlap points 7 and 8 of uncoated strips, bare metal lies against one another. The intermediate layer 6 can also consist of a plastic film attached between the two screen films 4 and 5.

Der Kunststoff der Zwischenschicht 6 kann als Haftvermittler ausgeführt sein. Dafür eignet sich beispielsweise ein Copolymer des Ethylens. Es wird durch Wärmezufuhr wirksam. Die dazu erforderliche Wärme wird beispielsweise beim Aufbringen des Mantels 3 erzeugt. Um die Schirmfolien 5 kann eine Folie aus Kunststoff herumgewickelt sein. Das ist besonders dann von Vorteil, wenn die beiden Schirmfolien 4 und 5 nicht fest miteinander verbunden sind.The plastic of the intermediate layer 6 can be designed as an adhesion promoter. A copolymer of ethylene is suitable for this, for example. It becomes effective through the application of heat. The heat required for this is generated, for example, when the jacket 3 is applied. A plastic film can be wrapped around the screen films 5. This is particularly advantageous if the two screen foils 4 and 5 are not firmly connected to one another.

Jeder der beiden Schirmfolien 4 und 5 kann ein metallischer Beidraht zugeordnet werden, der über die ganze Länge des Kabels K verläuft und an der jeweiligen Schirmfolie anliegt. Ein solcher Beidraht kann beispielsweise ein verzinnter Kupferdraht sein. Durch die Beidrähte wird die elektrische Kontaktierung der beiden Schirmfolien 4 und 5 erleichtert.A metallic drain wire can be assigned to each of the two shield foils 4 and 5, which runs over the entire length of the cable K and lies against the respective shield foil. Such a drain wire can be, for example, a tinned copper wire. Through the two wires, the electrical Contacting the two shield foils 4 and 5 facilitated.

Das Kabel K nach Fig. 1 wird gemäß Fig. 3 beispielsweise wie folgt hergestellt:The cable K according to FIG. 1 is produced according to FIG. 3, for example as follows:

Um eine Kabelseele S, die auch mehr oder weniger als vier Übertragungselemente 1 aufweisen kann, wird in einer Formungseinrichtung 9 ein von einer Spule 10 kommendes erstes metallisches Band 11 zu der Schirmfolie 4 mit der Überlappungsstelle 7 geformt. Die Kabelseele S und alle auf dieselbe aufgebrachten Schichten werden in Richtung des Pfeiles P durch die Anlage nach Fig. 3 bewegt. Das erste Band 11 ist einseitig mit einem Haftvermittler beschichtet. Diese Schicht liegt bei der Schirmfolie 4 außen.Around a cable core S, which can also have more or less than four transmission elements 1, a first metallic band 11 coming from a coil 10 is formed into the shielding film 4 with the overlap point 7 in a shaping device 9. The cable core S and all layers applied to the same are moved in the direction of arrow P by the system according to FIG. 3. The first band 11 is coated on one side with an adhesion promoter. This layer lies on the outside of the shielding film 4.

Um die Schirmfolie 4 wird in einer Formungseinrichtung 12 ein zweites metallisches Band 13 zu der Schirmfolie 5 mit der Überlappungsstelle 8 geformt, das von einer Spule 14 abgezogen wird. Das Band 13 ist ebenfalls einseitig mit einem Haftvermittler beschichtet. Diese Schicht liegt bei der Schirmfolie 5 innen. Auf den so aus den beiden Bändern 11 und 13 geformten Schirm 2 des Kabels K wird anschließend mittels eines Extruders 15 der Mantel 3 aufgebracht. Durch die dabei entstehende Wärme wird der Haftvermittler der beiden Bänder 11 und 13 aktiviert, so daß die beiden Schirmfolien 4 und 5 fest miteinander verbunden werden. Das fertige Kabel K kann dann auf eine Spule aufgewickelt werden.A second metallic band 13 is formed around the shielding film 4 in a shaping device 12 to form the shielding film 5 with the overlap point 8, which is pulled off from a coil 14. The tape 13 is also coated on one side with an adhesion promoter. This layer lies inside the shielding film 5. The sheath 3 is then applied to the screen 2 of the cable K thus formed from the two bands 11 and 13 by means of an extruder 15. The heat generated thereby activates the adhesion promoter of the two bands 11 and 13, so that the two screen foils 4 and 5 are firmly connected to one another. The finished cable K can then be wound up on a spool.

Claims (10)

Elektrisches Kabel zur Nachrichtenübertragung, bei welchem in einer Kabelseele mindestens ein aus isolierten elektrischen Leitern bestehendes Übertragungselement angeordnet ist, bei welchem die Kabelseele von einem metallischen Schirm umgeben ist und bei welchem über dem Schirm ein Mantel aus Isoliermaterial angebracht ist, dadurch gekennzeichnet, - daß der Schirm (2) aus zwei übereinander liegenden, aus metallischen Bändern geformten Schirmfolien (4,5) besteht, die beide mit einer in Längsrichtung des Kabels (K) verlaufenden Überlappungsstelle (7,8) zum Rohr geformt sind und - daß die Überlappungsstellen (7,8) der beiden Schirmfolien (4,5) in Umfangsrichtung gegeneinander versetzt sind. Electrical cable for transmitting messages, in which at least one transmission element consisting of insulated electrical conductors is arranged in a cable core, in which the cable core is surrounded by a metallic screen and in which a jacket made of insulating material is attached above the screen, characterized in that - That the screen (2) consists of two superimposed, formed from metallic strips screen films (4,5), both of which are formed with a longitudinal overlap of the cable (K) overlap (7,8) to the tube and - That the overlap points (7,8) of the two screen foils (4,5) are offset from one another in the circumferential direction. Kabel nach Anspruch 1, dadurch gekennzeichnet, daß die Überlappungsstellen (7,8) um 180° gegeneinander versetzt sind.Cable according to claim 1, characterized in that the overlap points (7, 8) are offset from one another by 180 °. Kabel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß zwischen den beiden Schirmfolien (4,5) eine isolierende Zwischenschicht (6) angeordnet ist.Cable according to claim 1 or 2, characterized in that an insulating intermediate layer (6) is arranged between the two shielding films (4, 5). Kabel nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die beiden Schirmfolien (4,5) durch die isolierende Zwischenschicht (6) fest miteinander verbunden sind.Cable according to one of claims 1 to 3, characterized in that the two shielding foils (4, 5) are firmly connected to one another by the insulating intermediate layer (6). Kabel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß um die äußere Schirmfolie (5) eine Folie aus Kunststoff herumgewickelt ist.Cable according to claim 1 or 2, characterized in that a film made of plastic is wrapped around the outer shielding film (5). Kabel nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß jeder Schirmfolie (4,5) ein metallischer Beidraht zugeordnet ist, der über die ganze Länge des Kabels (K) an der jeweiligen Schirmfolie (4,5) anliegt.Cable according to one of claims 1 to 5, characterized in that each shielding foil (4,5) is assigned a metallic drain wire which bears against the respective shielding foil (4,5) over the entire length of the cable (K). Kabel nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß mindestens eines der für die Schirmfolien (4,5) verwendeten Bänder einseitig mit einem Haftvermittler beschichtet ist, der im fertigen Schirm (2) der jeweils anderen Schirmfolie zugewandt ist.Cable according to one of claims 1 to 6, characterized in that at least one of the tapes used for the shielding foils (4, 5) is coated on one side with an adhesion promoter which faces the other shielding foil in the finished shield (2). Kabel nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß beide für die Schirmfolien (4,5) verwendeten Bänder einseitig mit einem Haftvermittler beschichtet sind, deren beschichtete Seiten im fertigen Schirm (2) aneinander liegen.Cable according to one of claims 1 to 6, characterized in that both tapes used for the shielding foils (4, 5) are coated on one side with an adhesion promoter, the coated sides of which lie against one another in the finished shield (2). Kabel nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß beide für die Schirmfolien (4,5) verwendeten Bänder einseitig mit einem Haftvermittler beschichtet und im fertigen Schirm (2) so angeordnet sind, daß die eine beschichtete Seite zwischen den beiden Schirmfolien (4,5) liegt, während die andere beschichtete Seite außen liegt.Cable according to one of claims 1 to 6, characterized in that both tapes used for the shielding foils (4, 5) are coated on one side with an adhesion promoter and are arranged in the finished shield (2) so that the one coated side between the two shielding foils ( 4,5), while the other coated side is on the outside. Verfahren zur Herstellung eines Kabels nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, - daß um eine mindestens ein Übertragungselement (1) enthaltende Kabelseele (S) eines Nachrichtenkabels ein erstes metallisches Band (11) mit in Längsrichtung überlappenden Kanten zu einer Schirmfolie (4) herumgeformt wird und - daß um die erste Schirmfolie (4) ein zweites metallisches Band (13) mit in Längsrichtung überlappenden Kanten zu einer Schirmfolie (5) so herumgeformt wird, daß die Überlappungsstellen (7,8) der beiden Schirmfolien (4,5) in Umfangsrichtung des Nachrichtenkabels (K) gegeneinander versetzt sind. Method for producing a cable according to one of claims 1 to 9, characterized in that - That around a at least one transmission element (1) containing cable core (S) of a communication cable, a first metallic band (11) with edges overlapping in the longitudinal direction is formed into a screen film (4) and - That around the first screen film (4) a second metallic band (13) with edges overlapping in the longitudinal direction is formed into a screen film (5) so that the overlap points (7,8) of the two screen films (4,5) in the circumferential direction of the Communication cables (K) are offset from each other.
EP96104781A 1995-08-19 1996-03-26 Electrical telecommunications cable Withdrawn EP0759624A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19530576 1995-08-19
DE19530576 1995-08-19

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EP0759624A1 true EP0759624A1 (en) 1997-02-26

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
EP0867891A1 (en) * 1997-03-27 1998-09-30 Alcatel Data transmission cable and its manufacturing process
CN110931178A (en) * 2019-12-09 2020-03-27 芜湖航天特种电缆厂股份有限公司 Wrapping equipment for cable

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2774183B1 (en) * 1998-01-26 2002-04-26 Alsthom Cge Alkatel SUBSTANTIALLY WATERPROOF TUBE CABLE HAVING AT LEAST ONE OPTICAL CONDUCTOR AND A HYDROGEN-ABSORBING PRODUCT
JPH11297132A (en) * 1998-04-06 1999-10-29 Sumitomo Electric Ind Ltd Coaxial cable and multicore cable using it

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GB1153152A (en) * 1965-09-13 1969-05-29 Gen Cable Corp Telephone Cable Sheath
US4510346A (en) * 1983-09-30 1985-04-09 At&T Bell Laboratories Shielded cable
GB2161016A (en) * 1984-06-29 1986-01-02 American Telephone & Telegraph Bonded sheath cable and methods of and apparatus for making
US5132491A (en) * 1991-03-15 1992-07-21 W. L. Gore & Associates, Inc. Shielded jacketed coaxial cable

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Publication number Priority date Publication date Assignee Title
GB1153152A (en) * 1965-09-13 1969-05-29 Gen Cable Corp Telephone Cable Sheath
US4510346A (en) * 1983-09-30 1985-04-09 At&T Bell Laboratories Shielded cable
GB2161016A (en) * 1984-06-29 1986-01-02 American Telephone & Telegraph Bonded sheath cable and methods of and apparatus for making
US5132491A (en) * 1991-03-15 1992-07-21 W. L. Gore & Associates, Inc. Shielded jacketed coaxial cable

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0867891A1 (en) * 1997-03-27 1998-09-30 Alcatel Data transmission cable and its manufacturing process
FR2761515A1 (en) * 1997-03-27 1998-10-02 Alsthom Cge Alcatel CABLE FOR DATA TRANSMISSION AND MANUFACTURING METHOD THEREOF
US6259019B1 (en) 1997-03-27 2001-07-10 Alcatel Cable for transmitting data and method of manufacturing it
CN110931178A (en) * 2019-12-09 2020-03-27 芜湖航天特种电缆厂股份有限公司 Wrapping equipment for cable

Also Published As

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JPH09129040A (en) 1997-05-16
KR970012800A (en) 1997-03-29

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