WO1996004666A1 - Cable for conveying electrical energy or telecommunications and method for the manufacture of such a cable - Google Patents

Cable for conveying electrical energy or telecommunications and method for the manufacture of such a cable Download PDF

Info

Publication number
WO1996004666A1
WO1996004666A1 PCT/CH1995/000171 CH9500171W WO9604666A1 WO 1996004666 A1 WO1996004666 A1 WO 1996004666A1 CH 9500171 W CH9500171 W CH 9500171W WO 9604666 A1 WO9604666 A1 WO 9604666A1
Authority
WO
WIPO (PCT)
Prior art keywords
cable
electrical conductor
conductor
protective screen
central electrical
Prior art date
Application number
PCT/CH1995/000171
Other languages
French (fr)
Inventor
Françis KRÄHENBÜHL
Original Assignee
Cables Cortaillod S.A.
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 Cables Cortaillod S.A. filed Critical Cables Cortaillod S.A.
Publication of WO1996004666A1 publication Critical patent/WO1996004666A1/en

Links

Classifications

    • 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
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H01B13/147—Feeding of the insulating material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0013—Extrusion moulding in several steps, i.e. components merging outside the die
    • B29C48/0015—Extrusion moulding in several steps, i.e. components merging outside the die producing hollow articles having components brought in contact outside the extrusion die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/06—Rod-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
    • H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
    • H01B1/124—Intrinsically conductive polymers
    • H01B1/127—Intrinsically conductive polymers comprising five-membered aromatic rings in the main chain, e.g. polypyrroles, polythiophenes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
    • H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
    • H01B1/124—Intrinsically conductive polymers
    • H01B1/128—Intrinsically conductive polymers comprising six-membered aromatic rings in the main chain, e.g. polyanilines, polyphenylenes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1808—Construction of the conductors
    • 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
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H01B13/141—Insulating conductors or cables by extrusion of two or more insulating layers
    • 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
    • H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable

Definitions

  • the present invention relates to a cable for transporting electrical energy or telecommunications comprising at least one central electrical conductor and an insulating layer, coaxial with said conductor, surrounded by a protective screen and an insulating outer sheath.
  • It also relates to a method of manufacturing such a cable.
  • cables for transporting electrical energy or telecommunications generally comprising one or more metallic conductors surrounded by an insulating layer, a conductive screen and an insulating outer sheath.
  • the conductors are generally of the multi-strand type made of copper or aluminum alloys and the screen is formed either by a metallic braid or by a metallic strip of one or more layers of juxtaposed wires, or by an extruded metallic sheath.
  • the insulating layer and the insulating outer sheath are made of thermoplastic or crosslinked polymers.
  • a first layer of a semiconductor must be interposed between this central conductor and the layer of coaxial insulator .
  • the conductors are produced independently, for example by drawing or the like, and covered with polymers by extrusion on a production line, which requires multiple manipulations and significant equipment and therefore has all the drawbacks associated with this mode of manufacturing.
  • a large diameter metallic conductor is relatively heavy, which implies that the cable is also heavy. Handling such a cable during its production, transport or laying requires suitable heavy and expensive equipment. Furthermore, the protective screen is difficult to install around the insulating layer and its installation is sometimes delicate, which significantly increases the cost of manufacturing the cable. In addition, in telecommunications cables, a protective screen in the form of a braid does not guarantee optimal effectiveness for ensuring protection against high frequencies.
  • Cables with several conductive strands, or a screen in the form of a braid have gaps in which water can infiltrate. To obtain the tightness of such cables it is necessary to have recourse to additional components, which imposes additional interventions and consequently increases the production cost of the cables.
  • the cable described in publication EP-A-0 624 885 has a central metallic conductor and only the first layer which covers it is made of conductive polymer. This construction also excludes manufacturing by coextrusion of the various components.
  • the present invention proposes to overcome the various known drawbacks by producing a particularly light cable, which can be produced on a single production line, which guarantees a transverse and longitudinal sealing and whose protective screen is particularly effective against high frequency electromagnetic interference.
  • said intrinsically conductive polymers are chosen from one of the following components: polyacetate, polyacetylene, polyaniline, polyphenylene, polypyrrole, polythiophene, paraphenylene sulfide, or intrinsically conductive derivatives.
  • the set goal is also achieved by a method of manufacturing a cable for transporting electrical energy or telecommunications comprising at least one central electrical conductor and an insulating layer, coaxial with said conductor, surrounded by a protective screen and an insulating outer sheath, characterized in that the central electrical conductor and the protective screen are made of intrinsically conductive polymers that are thermoplastic or crosslinked by coextrusion.
  • the cable is produced by simultaneously extruding said central electrical conductor, said insulating layer, said protective screen and said insulating outer sheath.
  • extrusion of said central electrical conductor and of said successive superposed layers is preferably carried out by means of an extrusion machine associated with extruders whose number is equal to the number of different materials to be extruded to form said cable, this machine comprising at at least one multi-channel extrusion head, each channel being connected to one of said extruders.
  • FIG. 1 is a perspective view of a cable according to the present invention
  • FIG. 2 is a schematic representation of an installation for manufacturing the cable according to the present invention.
  • FIG. 3 is a schematic view of an extrusion head used to make the cable of Figure 1.
  • the cable 10 comprises a central electrical conductor 11 made of an intrinsically conductive polymer having a cylindrical profile of circular section.
  • This polymer is advantageously thermoplastic and is chosen from at least one of the following components: polyacetate, polyacetylene, polyaniline, polyphenylene, polypyrrole, polythiophene, paraphenylene sulfide or any other intrinsically conductive derivative.
  • the central electrical conductor 11 is surrounded by an insulating coaxial layer 12 made of an insulating thermoplastic polymer such as, for example, polyvinyl chloride or polyethylene.
  • a protective screen 13 also made of an intrinsically conductive polymer surrounds the insulating layer 12.
  • This screen which forms a completely closed tube around the layer 12, is also made of an intrinsically conductive polymer. It is surrounded by an outer insulating thermoplastic sheath 14, for example made of polyvinyl chloride or polyethylene. All the polymers used in this cable are thermoplastic or crosslinked polymers which can be extruded.
  • a production line shown diagrammatically in FIG. 2, comprises an extrusion head 15, illustrated in section in more detail in FIG. 3, provided with four inlets 16, 17, 18, 19 and four outlets 20, 21 , 22, 23 arranged in front of the extrusion head, said inlets and said outputs being connected respectively to each other.
  • the four inputs 16 to 19 are respectively connected to four extruders 24, 25, 26, 27 each containing a material allowing a layer of the cable to be produced.
  • the first outlet 20 is circular and allows the central conductor 11 to be extruded from the cable.
  • the other outlets have an annular shape and are arranged concentrically around the outlet 20.
  • the cable according to the present invention is completely produced by coextrusion. Each layer completely covers the previous layer. This process allows a great simplification of the manufacturing since a single production line is sufficient. There is therefore no intermediate manipulation for the installation of metallic elements as is necessary on conventional lines, which leads to a saving of time as well as a substantial reduction in production costs. In this way, the quality and the weight / power factor of the cable are also considerably improved.
  • the cable according to the present invention also has many other advantages. As it is made only of thermoplastic materials, it is fully recyclable. It does not contain metal and is therefore particularly light. By way of comparison, a copper conductor cable with a cross-section of 1000 mm2 intended for a voltage of 60 kV weighs approximately 12.3 kg / m while a cable according to the present invention weighs only approximately 3.1 kg / m for the same technical specifications.
  • the longitudinal tightness of the cable is absolutely guaranteed.
  • this protection is particularly effective.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Insulated Conductors (AREA)

Abstract

Cable (10) for conveying electrical energy or communications comprising a central lead (11), an insulating layer (12) coaxial to said conductor, a shield (13) and an outer sheath (14). The insulating layer (12) and the outer sheath (14) are made of insulating polymers such as polyvinyl chloride or polyethylene, while the central lead (11) and the shield (13) are made of intrinsically conducting thermoplastic or crosslinked polymers. The cable is formed by extrusion of its different components using a multi-channel extrusion head (15).

Description

CABLE DE TRANSPORT D'ENERGIE ELECTRIQUE OU DE TELECOMMUNICATIONS ET PROCEDE DE FABRICATION D'UN TEL CABLECABLE FOR TRANSPORTING ELECTRICAL ENERGY OR TELECOMMUNICATIONS AND METHOD FOR MANUFACTURING SUCH A CABLE
La présente invention concerne un câble de transport d' énergie électrique ou de télécommunications comportant au moins un conducteur électrique central et une couche d'isolant , coaxiale audit conducteur, entourée d'un écran de protection et d'une gaine extérieure isolante .The present invention relates to a cable for transporting electrical energy or telecommunications comprising at least one central electrical conductor and an insulating layer, coaxial with said conductor, surrounded by a protective screen and an insulating outer sheath.
Elle concerne également un procédé de fabrication d' un tel câble.It also relates to a method of manufacturing such a cable.
11 existe actuellement une grande variété de câbles de transport d'énergie électrique ou de télécommunications comportant généralement un ou plusieurs conducteurs métalliques entourés d' une couche isolante , d' un écran conducteur et d'une gaine extérieure isolante. Les conducteurs sont généralement du type multibrins en cuivre ou en alliages d'aluminium et l'écran est formé soit par une tresse métallique soit par un ruban métallique d'une ou plusieurs couches de fils juxtaposés , ou par une gaine métallique extrudée. La couche isolante et la gaine extérieure isolante sont réalisées en des polymères thermoplastiques ou réticulés . En outre , dans les câbles de transport d' énergie , étant donné que la périphérie du conducteur central n'est pas parfaitement circulaire, une première couche d'un semi-conducteur doit être interposée entre ce conducteur central et la couche d'isolant coaxiale. 11 en est de même entre l'isolant et l'écran . Enfin , les conducteurs sont réalisés de façon indépendante, par exemple par tréfilage ou similaire , et recouverts des polymères par extrusion sur une ligne de fabrication , ce qui nécessite de multiples manipulations et des équipements importants et présente donc tous les inconvénients liés à ce mode de fabrication.There is currently a wide variety of cables for transporting electrical energy or telecommunications generally comprising one or more metallic conductors surrounded by an insulating layer, a conductive screen and an insulating outer sheath. The conductors are generally of the multi-strand type made of copper or aluminum alloys and the screen is formed either by a metallic braid or by a metallic strip of one or more layers of juxtaposed wires, or by an extruded metallic sheath. The insulating layer and the insulating outer sheath are made of thermoplastic or crosslinked polymers. In addition, in energy transport cables, since the periphery of the central conductor is not perfectly circular, a first layer of a semiconductor must be interposed between this central conductor and the layer of coaxial insulator . It is the same between the insulation and the screen. Finally, the conductors are produced independently, for example by drawing or the like, and covered with polymers by extrusion on a production line, which requires multiple manipulations and significant equipment and therefore has all the drawbacks associated with this mode of manufacturing.
D'autre part un conducteur métallique de grand diamètre est relativement lourd ce qui implique que le câble est également lourd. La manipulation d' un tel câble lors de sa production, de son transport ou de sa pose nécessite des équipements appropriés lourds et coûteux. Par ailleurs , l'écran de protection est difficile à mettre en place autour de la couche isolante et sa pose est parfois délicate , ce qui augmente de façon sensible le coût de fabrication du câble . De plus , dans les câbles de télécommunications , un écran de protection sous forme de tresse ne garantit pas une efficacité optimale pour assurer la protection contre les hautes fréquences .On the other hand, a large diameter metallic conductor is relatively heavy, which implies that the cable is also heavy. Handling such a cable during its production, transport or laying requires suitable heavy and expensive equipment. Furthermore, the protective screen is difficult to install around the insulating layer and its installation is sometimes delicate, which significantly increases the cost of manufacturing the cable. In addition, in telecommunications cables, a protective screen in the form of a braid does not guarantee optimal effectiveness for ensuring protection against high frequencies.
De plus , comme certaines parties du câble sont tréfilées et que d' autres sont extrudées , le câble ne peut pas être réalisé sur une seule ligne de fabrication ce qui aboutit à des installations coûteuses et complexes .In addition, since certain parts of the cable are drawn and others are extruded, the cable cannot be produced on a single production line, which results in costly and complex installations.
Les câbles comportant plusieurs brins conducteurs , ou un écran en forme de tresse, présentent des interstices dans lesquels l'eau peut s' infiltrer . Pour obtenir l' étanchéité de tels câbles il est nécessaire d'avoir recours a des composants additionnels , ce qui impose des interventions supplémentaires et par conséquent renchérit le coût de production des câbles .Cables with several conductive strands, or a screen in the form of a braid, have gaps in which water can infiltrate. To obtain the tightness of such cables it is necessary to have recourse to additional components, which imposes additional interventions and consequently increases the production cost of the cables.
Le câble connu de l' art antérieur le plus proche est décrit dans la publication EP-A-0 416 52. La construction d' un tel câble est relativement complexe et finalement assez classique étant donné que , bien que le conducteur central ne soit pas métallique, le câble comporte des rubans métalliques disposés entre les couches extrudées . Cette construction exclut totalement une fabrication simplifiée par coextrusion de couches superposées d' une matière thermof ormable .The closest known cable of the prior art is described in publication EP-A-0 416 52. The construction of such a cable is relatively complex and ultimately fairly conventional since, although the central conductor is not metallic, the cable has metallic ribbons placed between the extruded layers. This construction completely excludes a simplified manufacture by coextrusion of superimposed layers of a thermoformable material.
Le câble décrit dans la publication EP-A-0 624 885 comporte un conducteur central métallique et seule la première couche qui le recouvre est en polymère conducteur . Cette construction exclut elle aussi une fabrication par coextrusion des différents composants .The cable described in publication EP-A-0 624 885 has a central metallic conductor and only the first layer which covers it is made of conductive polymer. This construction also excludes manufacturing by coextrusion of the various components.
La présente invention se propose de pallier les divers inconvénients connus en réalisant un câble particulièrement léger , qui peut être produit sur une seule ligne de fabrication , qui garantit une étanchéité transversale et longitudinale et dont l'écran de protection est particulièrement efficace contre les interférences électromagnétiques à haute fréquence.The present invention proposes to overcome the various known drawbacks by producing a particularly light cable, which can be produced on a single production line, which guarantees a transverse and longitudinal sealing and whose protective screen is particularly effective against high frequency electromagnetic interference.
Ce but est atteint par un câble tel que défini en préambule et caractérisé en ce que ledit conducteur électrique central et ledit écran de protection sont constitués de polymères intrinsèquement conducteurs thermoplastiques ou réticulés extrudés .This object is achieved by a cable as defined in the preamble and characterized in that said central electrical conductor and said protective screen are made of intrinsically conductive thermoplastic or crosslinked extruded polymers.
Selon une forme de réalisation préférée , lesdits polymères intrinsèquement conducteurs sont choisis parmi l'un des composants suivants : polyacétate , polyacétylène , polyaniline, polyphénylène , polypyrrole , polythiophène , sulfure de paraphénylène, ou des dérivés intrinsèquement conducteurs.According to a preferred embodiment, said intrinsically conductive polymers are chosen from one of the following components: polyacetate, polyacetylene, polyaniline, polyphenylene, polypyrrole, polythiophene, paraphenylene sulfide, or intrinsically conductive derivatives.
Le but fixé est également atteint par un procédé de fabrication d'un câble de transport d'énergie électrique ou de télécommunications comportant au moins un conducteur électrique central et une couche d'isolant, coaxiale audit conducteur , entourée d'un écran de protection et d'une gaine extérieure isolante, caractérisé en ce que l'on réalise le conducteur électrique central et l'écran de protection en des polymères intrinsèquement conducteurs thermoplastiques ou réticulés par coextrusion.The set goal is also achieved by a method of manufacturing a cable for transporting electrical energy or telecommunications comprising at least one central electrical conductor and an insulating layer, coaxial with said conductor, surrounded by a protective screen and an insulating outer sheath, characterized in that the central electrical conductor and the protective screen are made of intrinsically conductive polymers that are thermoplastic or crosslinked by coextrusion.
Selon un mode de réalisation préféré, on réalise le câble en extrudant simultanément ledit conducteur électrique central, ladite couche d'isolant , ledit écran de protection et ladite gaine extérieure isolante .According to a preferred embodiment, the cable is produced by simultaneously extruding said central electrical conductor, said insulating layer, said protective screen and said insulating outer sheath.
L' extrusion dudit conducteur électrique central et desdites couches successives superposées est de préférence effectuée au moyen d' une machine d' extrusion associée à des boudineuses dont le nombre est égal au nombre de matériaux différents à extruder pour constituer ledit câble, cette machine comportant au moins une tête d' extrusion à voies multiples , chaque voie étant connectée à une desdites boudineuses .The extrusion of said central electrical conductor and of said successive superposed layers is preferably carried out by means of an extrusion machine associated with extruders whose number is equal to the number of different materials to be extruded to form said cable, this machine comprising at at least one multi-channel extrusion head, each channel being connected to one of said extruders.
La présente invention et ses avantages apparaîtront mieux dans la description suivante d' un exemple de réalisation et en référence aux dessins annexés dans lesquels :The present invention and its advantages will appear better in the following description of an exemplary embodiment and with reference to the accompanying drawings in which:
- la figure 1 est une vue en perspective d' un câble selon la présente invention ,FIG. 1 is a perspective view of a cable according to the present invention,
- la figure 2 est une représentation schématique d' une installation de fabrication du câble selon la présente invention , etFIG. 2 is a schematic representation of an installation for manufacturing the cable according to the present invention, and
- la figure 3 est une vue schématique d' une tête d' extrusion utilisée pour réaliser le câble de la figure 1.- Figure 3 is a schematic view of an extrusion head used to make the cable of Figure 1.
En référence à la figure 1 , le câble 10 comporte un conducteur électrique central 11 réalisé en un polymère intrinsèquement conducteur ayant un profil cylindrique de section circulaire . Ce polymère est avantageusement thermoplastique et est choisi parmi au moins l'un des composants suivants : polyacétate, polyacétylène, polyaniline, polyphénylène , polypyrrole, polythiophène, sulfure de paraphénylène ou tout autre dérivé intrinsèquement conducteur. Le conducteur électrique central 11 est entouré d'une couche coaxiale isolante 12 réalisée en un polymère thermoplastique isolant tel que par exemple du chlorure de polyvinyle ou du polyethylene. Un écran de protection 13 réalisé également en un polymère intrinsèquement conducteur entoure la couche isolante 12. Cet écran , qui forme un tube entièrement fermé autour de la couche 12, est lui aussi réalisé en un polymère intrinsèquement conducteur. Il est entouré d' une gaine extérieure 14 thermoplastique isolante, par exemple en chlorure de polyvinyle ou en polyethylene. Tous les polymères utilisés dans ce câble sont des polymères thermoplastiques ou réticulés qui peuvent être extrudés .Referring to Figure 1, the cable 10 comprises a central electrical conductor 11 made of an intrinsically conductive polymer having a cylindrical profile of circular section. This polymer is advantageously thermoplastic and is chosen from at least one of the following components: polyacetate, polyacetylene, polyaniline, polyphenylene, polypyrrole, polythiophene, paraphenylene sulfide or any other intrinsically conductive derivative. The central electrical conductor 11 is surrounded by an insulating coaxial layer 12 made of an insulating thermoplastic polymer such as, for example, polyvinyl chloride or polyethylene. A protective screen 13 also made of an intrinsically conductive polymer surrounds the insulating layer 12. This screen, which forms a completely closed tube around the layer 12, is also made of an intrinsically conductive polymer. It is surrounded by an outer insulating thermoplastic sheath 14, for example made of polyvinyl chloride or polyethylene. All the polymers used in this cable are thermoplastic or crosslinked polymers which can be extruded.
En référence aux figures 2 et 3 , le câble selon la présente invention est obtenu comme suit . Une ligne de fabrication, représentée schématiquement par la figure 2, comporte une tête d' extrusion 15, illustrée en coupe de façon plus détaillée par la figure 3, pourvue de quatre entrées 16 , 17 , 18 , 19 et de quatre sorties 20, 21 , 22, 23 disposées à l'avant de la tête d' extrusion , lesdites entrées et lesdites sorties étant reliées respectivement entre elles . Les quatre entrées 16 à 19 sont respectivement reliées à quatre boudineuses 24 , 25 , 26 , 27 contenant chacun une matière permettant de réaliser une couche du câble. La première sortie 20 est circulaire et permet l' extrusion du conducteur central 11 du câble. Les autres sorties ont une forme annulaire et sont disposées de façon concentrique autour de la sortie 20.Referring to Figures 2 and 3, the cable according to the present invention is obtained as follows. A production line, shown diagrammatically in FIG. 2, comprises an extrusion head 15, illustrated in section in more detail in FIG. 3, provided with four inlets 16, 17, 18, 19 and four outlets 20, 21 , 22, 23 arranged in front of the extrusion head, said inlets and said outputs being connected respectively to each other. The four inputs 16 to 19 are respectively connected to four extruders 24, 25, 26, 27 each containing a material allowing a layer of the cable to be produced. The first outlet 20 is circular and allows the central conductor 11 to be extruded from the cable. The other outlets have an annular shape and are arranged concentrically around the outlet 20.
Le câble selon la présente invention est totalement réalisé par coextrusion . Chaque couche recouvre entièrement la couche précédente . Ce procédé permet une grande simplification de la fabrication puisqu'une seule ligne de production est suffisante. 11 n'y a donc pas de manipulations intermédiaires pour la mise en place d'éléments métalliques comme cela est nécessaire sur les lignes classiques , ce qui entraîne un gain de temps ainsi qu'une diminution substantielle des coûts de production. De cette façon, l'on améliore aussi considérablement la qualité et le facteur poids/puissance du câble .The cable according to the present invention is completely produced by coextrusion. Each layer completely covers the previous layer. This process allows a great simplification of the manufacturing since a single production line is sufficient. There is therefore no intermediate manipulation for the installation of metallic elements as is necessary on conventional lines, which leads to a saving of time as well as a substantial reduction in production costs. In this way, the quality and the weight / power factor of the cable are also considerably improved.
Le câble selon la présente invention présente en outre de nombreux autres avantages . Comme il n'est constitué que de matières thermoplastiques , il est entièrement recyclable. Il ne comporte pas de métal et est de ce fait particulièrement léger . A titre de comparaison , un câble à conducteur en cuivre de 1000 mm2 de section prévu pour une tension de 60 kV pèse environ 12, 3 kg/m alors qu'un câble selon la présente invention ne pèse qu'environ 3, 1 kg/m pour les mêmes spécifications techniques .The cable according to the present invention also has many other advantages. As it is made only of thermoplastic materials, it is fully recyclable. It does not contain metal and is therefore particularly light. By way of comparison, a copper conductor cable with a cross-section of 1000 mm2 intended for a voltage of 60 kV weighs approximately 12.3 kg / m while a cable according to the present invention weighs only approximately 3.1 kg / m for the same technical specifications.
En raison de son mode de réalisation, l'étanchéité longitudinale du câble est garantie d'une manière absolue. De plus , comme l'écran de protection forme un tube fermé , cette protection est particulièrement efficace. Due to its embodiment, the longitudinal tightness of the cable is absolutely guaranteed. In addition, as the protective screen forms a closed tube, this protection is particularly effective.

Claims

Revendications claims
1. Câble de transport d'énergie électrique ou de télécommunications comportant au moins un conducteur électrique central et une couche d'isolant, coaxiale audit conducteur , entourée d' un écran de protection et d'une gaine extérieure isolante , caractérisé en ce que ledit conducteur électrique central ( 11 ) et ledit écran de protection ( 13) sont constitués de polymères intrinsèquement conducteurs thermoplastiques ou réticulés coextrudés .1. Cable for transporting electrical energy or telecommunications comprising at least one central electrical conductor and an insulating layer, coaxial with said conductor, surrounded by a protective screen and an insulating outer sheath, characterized in that said central electrical conductor (11) and said protective screen (13) are made of intrinsically conductive thermoplastic or crosslinked coextruded polymers.
2. Câble selon la revendication 1 , caractérisé en ce que ledit polymère intrinsèquement conducteur est choisi parmi l'un des composants suivants : polyacétate, polyacétylène , polyaniline, polyphénylène , polypyrrole, polythiophène, sulfure de paraphénylène , ou des dérivés intrinsèquement conducteurs .2. Cable according to claim 1, characterized in that said intrinsically conductive polymer is chosen from one of the following components: polyacetate, polyacetylene, polyaniline, polyphenylene, polypyrrole, polythiophene, paraphenylene sulfide, or intrinsically conductive derivatives.
3. Procédé de fabrication d'un câble de transport d'énergie électrique ou de télécommunication comportant au moins un conducteur électrique central et une couche d'isolant, coaxiale audit conducteur, entourée d' un écran de protection et d'une gaine extérieure isolante , selon la revendication 1 , caractérisé en ce que l'on réalise le conducteur électrique central (11) et l'écran de protection (13) en des polymères intrinsèquement conducteurs thermoplastiques ou réticulés par coextrusion.3. Method of manufacturing a cable for transporting electrical energy or telecommunications comprising at least one central electrical conductor and an insulating layer, coaxial with said conductor, surrounded by a protective screen and an insulating outer sheath , according to claim 1, characterized in that the central electrical conductor (11) and the protective screen (13) are made of intrinsically conductive polymers that are thermoplastic or crosslinked by coextrusion.
4. Procédé selon la revendication 3, caractérisé en ce que l'on réalise le câble en extrudant simultanément ledit conducteur électrique central (11 ) , ladite couche d'isolant (12) , ledit écran de protection ( 13) et ladite gaine extérieure isolante ( 14) .4. Method according to claim 3, characterized in that the cable is produced by simultaneously extruding said central electrical conductor (11), said insulating layer (12), said protective screen (13) and said insulating outer sheath (14).
5. Procédé selon la revendication 4, caractérisé en ce que l' extrusion dudit conducteur électrique central ( 11 ) et desdites couches successives superposées ( 12, 13, 14) est effectuée au moyen d' une machine d' extrusion associée à des boudineuses (24, 25, 26, 27) dont le nombre est égal au nombre de matériaux différents à extruder pour constituer ledit câble, cette machine comportant au moins une tête d' extrusion (15) à voies multiples , chaque voie étant connectée à une desdites boudineuses, 5. Method according to claim 4, characterized in that the extrusion of said central electrical conductor (11) and said successive superposed layers (12, 13, 14) is carried out by means of an extrusion machine associated with extruders ( 24, 25, 26, 27) the number of which is equal to the number of different materials to be extruded to form said cable, this machine comprising at least one multi-channel extrusion head (15), each channel being connected to one of said extruders,
PCT/CH1995/000171 1994-08-01 1995-07-25 Cable for conveying electrical energy or telecommunications and method for the manufacture of such a cable WO1996004666A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9409676A FR2723245B1 (en) 1994-08-01 1994-08-01 ELECTRIC POWER OR TELECOMMUNICATION CABLE AND METHOD FOR MANUFACTURING SUCH A CABLE
FR94/09676 1994-08-01

Publications (1)

Publication Number Publication Date
WO1996004666A1 true WO1996004666A1 (en) 1996-02-15

Family

ID=9466074

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1995/000171 WO1996004666A1 (en) 1994-08-01 1995-07-25 Cable for conveying electrical energy or telecommunications and method for the manufacture of such a cable

Country Status (2)

Country Link
FR (1) FR2723245B1 (en)
WO (1) WO1996004666A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19744527A1 (en) * 1997-10-09 1999-04-15 Innocept Medizintechnik Gmbh Elastomeric insulated cable produced by co-extrusion
EP1355323A1 (en) * 2000-12-26 2003-10-22 Matsushita Electric Industrial Co., Ltd. Condutive organic thin film, process for producing the same, and organic photoelectronic device, electric wire, and electrode aech employing the same
EP1658950A1 (en) * 2003-08-27 2006-05-24 Pla Giken Co., Ltd. Extrusion molding apparatus for resin multi-layer tube
CN103050198A (en) * 2012-12-29 2013-04-17 安徽省康利亚实业有限公司 Extrusion process for polyvinyl chloride jacket of core

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA3022170C (en) * 2016-04-27 2024-06-04 Caiola Filiere S.R.L. Sealing module for cables or pipes as well as method and apparatus for providing the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0416452A2 (en) * 1989-09-05 1991-03-13 ABB Kabel und Draht GmbH Electro-filter cable
EP0624885A1 (en) * 1993-05-10 1994-11-17 Alcatel Cable Cable usable within the telecommunications field

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0416452A2 (en) * 1989-09-05 1991-03-13 ABB Kabel und Draht GmbH Electro-filter cable
EP0624885A1 (en) * 1993-05-10 1994-11-17 Alcatel Cable Cable usable within the telecommunications field

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19744527A1 (en) * 1997-10-09 1999-04-15 Innocept Medizintechnik Gmbh Elastomeric insulated cable produced by co-extrusion
EP1355323A1 (en) * 2000-12-26 2003-10-22 Matsushita Electric Industrial Co., Ltd. Condutive organic thin film, process for producing the same, and organic photoelectronic device, electric wire, and electrode aech employing the same
EP1355323A4 (en) * 2000-12-26 2006-11-22 Matsushita Electric Ind Co Ltd Condutive organic thin film, process for producing the same, and organic photoelectronic device, electric wire, and electrode aech employing the same
EP1658950A1 (en) * 2003-08-27 2006-05-24 Pla Giken Co., Ltd. Extrusion molding apparatus for resin multi-layer tube
EP1658950A4 (en) * 2003-08-27 2009-04-15 Pla Giken Co Ltd Extrusion molding apparatus for resin multi-layer tube
CN103050198A (en) * 2012-12-29 2013-04-17 安徽省康利亚实业有限公司 Extrusion process for polyvinyl chloride jacket of core

Also Published As

Publication number Publication date
FR2723245A1 (en) 1996-02-02
FR2723245B1 (en) 1996-09-13

Similar Documents

Publication Publication Date Title
EP0763831B1 (en) Multi-pairs cable, shielded by pair and easy to connect
EP0964408B1 (en) Information transmission cable and its manufacturing method
US5132491A (en) Shielded jacketed coaxial cable
EP0643399B1 (en) High frequency transmission cable
CA2088215C (en) High frequency electric cable
FR2693828A1 (en) Signal cable with a metal-coated polymer screen.
CA1253223A (en) Electrical cable for the transportation of very high currents at low voltages, and its manufacture
FR2725302A1 (en) AN ELECTRICAL ISOLATOR EQUIPPED WITH OPTICAL FIBERS AND ITS MANUFACTURING METHOD
EP0003104A1 (en) Electric coaxial cable
EP0326441B1 (en) Process for producing an electromagnetic shield fastening, machine for carrying out this process and fastening obtained with the aid of this process or this machine
FR2907256A1 (en) ELECTRICAL CONTROL CABLE AND METHOD OF MANUFACTURING THE SAME
WO1996004666A1 (en) Cable for conveying electrical energy or telecommunications and method for the manufacture of such a cable
CA2589141A1 (en) Cable manufacturing process
FR2508180A1 (en) OPTICAL FIBER CABLE AND METHOD FOR MANUFACTURING THE SAME
EP1986199B1 (en) Method of producing a class 5 insulated electric conductor
EP1605474B1 (en) Cable comprising a plurality of insulated conductors contained in the same jacket and manufacturing method of the cable.
FR2468189A1 (en) ELECTRIC CABLE PROTECTED AGAINST MOISTURE
EP0015816B1 (en) Method of manufacturing a coaxial cable
CH669277A5 (en) High tension electric cable with extruded insulating layers - consists of synthetic materials of different dielectric properties sandwiched between 2 semiconducting layers
FR2520940A1 (en) Radiating coaxial transmission cable mfr. technique - includes deposited inner dielectric surrounded by wrap-around metal ribbon forming outer conductor
EP1016165B1 (en) Radiating cable
FR2698477A1 (en) High frequency signal transmission cable.
CH631568A5 (en) ELECTRIC CABLE.
FR2933804A1 (en) ELECTRIC CABLE AND METHOD FOR MANUFACTURING THE SAME.
EP0692797A1 (en) Telecommunication cable

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CA JP KP KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA