EP1605474B1 - Cable comprising a plurality of insulated conductors contained in the same jacket and manufacturing method of the cable. - Google Patents

Cable comprising a plurality of insulated conductors contained in the same jacket and manufacturing method of the cable. Download PDF

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Publication number
EP1605474B1
EP1605474B1 EP05300448.7A EP05300448A EP1605474B1 EP 1605474 B1 EP1605474 B1 EP 1605474B1 EP 05300448 A EP05300448 A EP 05300448A EP 1605474 B1 EP1605474 B1 EP 1605474B1
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EP
European Patent Office
Prior art keywords
cable
jacket
skin
insulating element
sheath
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Not-in-force
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EP05300448.7A
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German (de)
French (fr)
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EP1605474A3 (en
EP1605474A2 (en
Inventor
Christèle KENSICHER
Patrick Odot
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Nexans SA
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Nexans SA
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Publication of EP1605474A3 publication Critical patent/EP1605474A3/en
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    • 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
    • H01B7/02—Disposition of insulation
    • H01B7/0275—Disposition of insulation comprising one or more extruded layers of insulation
    • 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
    • H01B7/02—Disposition of insulation
    • H01B7/0208—Cables with several layers of insulating material
    • 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
    • H01B7/38—Insulated conductors or cables characterised by their form with arrangements for facilitating removal of insulation

Definitions

  • the present invention relates to a cable composed of a plurality of insulated conductors extending within the same protective sheath.
  • the invention also relates to a method of manufacturing such a cable.
  • the invention finds a particularly advantageous, but not exclusive, application in the field of energy and / or telecommunication cables.
  • an insulated conductor very generally designates any electrically conductive element covered with an electrically insulating element. It is furthermore understood that the conductive element and / or the insulating element may have a simple or composite structure. Thus, the conductive element may consist of several independent electrical conductors or not, and that the insulating element may be composed of a plurality of superimposed insulating layers.
  • a known solution to solve this gluing problem consists in covering the outer surface of each insulated conductor with talc, prior to the extrusion of the sheath. But this operation is impractical to implement, mainly because of the powderiness of talc that makes handling difficult and inevitably messy. In the end, it penalizes the productivity of the entire cable manufacturing chain.
  • the application of this non-stick material also requires the use of specific equipment, which also has the effect of negatively impacting the cost price of the cable.
  • EP-1 176 612 which describes an electrical cable with a bilayer insulation whose thickness ratio of the inner layer to the outer layer is between 50:50 and 70:30.
  • the technical problem to be solved, by the object of the present invention is to propose a cable comprising at least two insulated conductors grouped within the same sheath, each insulated conductor comprising a conductive element extending inside. an insulating element, cable that would avoid the problems of the prior art by being substantially less expensive to manufacture, while remaining easy to strip.
  • skin here designates an extremely thin layer which individually wraps an isolated conductor and which strongly adheres to the outer surface of the corresponding insulating element, the surface with which said layer cooperates by close contact. But in addition, this skin here advantageously has the property of not adhering to the inner surface of the sheath. The latter can therefore be stripped very easily, without furthermore that the integrity of the insulated conductors can not be altered.
  • the invention as thus defined has the advantage of being significantly easier to implement than the solutions of the prior art, since it only requires conventional cable manufacturing equipment, in this case extrusion equipment.
  • the solution of interposing a skin must thus allow a productivity gain of the order of 10%, while ensuring non-adhesion between the sheath and the individual insulated conductors.
  • the present invention also relates to the features which will emerge during the following description, which should be considered in isolation or in all their possible technical combinations.
  • each insulated conductor 2 is constituted by a conductive element 4 of copper extending inside an insulating element 5 made of polymer.
  • each insulated conductor 2 is also covered with a skin 6 which is integral with its insulating element 5 and which is non-adherent with respect to the sheath 3.
  • each skin 6 has a thickness of 0.05 to 0, 2 mm.
  • the skin 6 here has no other function than to form an interface between each insulated conductor 2 and the sheath 3. This explains why its thickness is so low compared to that of each insulating element 5 and / or to that sheath 3 which are rather of the order of a millimeter.
  • each skin 6 is here based on polypropylene.
  • this plastic material has the advantage of having significant anti-adhesive properties vis-à-vis most materials that are commonly used to form ducts 3 in the field of cable.
  • the melting temperature of the polypropylene is higher than the temperature of use of the sheath materials in question, there is no risk of sticking during the formation of the sheath 3.
  • the skin 6 will advantageously be formed at the same time as the corresponding insulating element 5; the joining then taking place by surface interpenetration of the two types of materials.
  • each insulating element 5 is also based on at least one crosslinked polyolefin, and the sheath 3 is based on at least one filled polyolefin.
  • each insulating element 5 is made from a composition comprising at least one polyolefin of which at least one is crosslinkable.
  • the sheath 3 is made from a polyolefin type matrix in which is dispersed an organic charge, independently of the function of the latter.
  • each insulating element 5 is here based on crosslinked polyethylene.
  • the sheath 3 is based on a mixture of ethyl vinyl acetate and polyethylene.
  • each skin 6 can also be made from a mixture of polypropylene and polyvinyl chloride.
  • the proportion of polypropylene with respect to the polyvinyl chloride may advantageously vary from 5 to 30% in the mixture comprising the skin 6.
  • each insulating element 5 is then based on at least one halogenated polymer, while the sheath 3 is based on at least one charged halogenated polymer.
  • each insulating element 5 is based on polyvinyl chloride.
  • the sheath 3 is based on filled polyvinyl chloride.
  • polypropylene and polyvinyl chloride are a priori not compatible, in that there can be theoretically adhesion between these two types of plastic materials, including interpenetration in the molten state .
  • a skin 6 made of a mixture of polypropylene and polyvinyl chloride as previously defined is advantageously able to adhere to an insulating member 5 polyvinyl chloride if the materials in question are both brought into contact in the molten state.
  • the composition of the sheath 3 is loaded with chalk. This characteristic is essentially intended to lower the cost price of the sheath 3.
  • composition of the sheath 3 may further advantageously comprise a plasticizer.
  • the invention also relates to a method of manufacturing a cable 1 comprising at least two insulated conductors 2 grouped together in the same sheath 3, each insulated conductor 2 comprising a conductive element 4 extending inside a insulating element 5.
  • the cable according to the invention can thus be produced with conventional extrusion equipment, which proves to be particularly advantageous in terms of manufacturing cost, compared to the processes of the state of the art which requires expensive specific equipment.
  • the extrusion of each skin 6 is carried out simultaneously with the extrusion of the corresponding insulating element 5.

Description

La présente invention concerne un câble composé d'une pluralité de conducteurs isolés s'étendant à l'intérieur d'une même gaine de protection.The present invention relates to a cable composed of a plurality of insulated conductors extending within the same protective sheath.

L'invention concerne également un procédé de fabrication d'un tel câble.The invention also relates to a method of manufacturing such a cable.

L'invention trouve une application particulièrement avantageuse, mais non exclusive, dans le domaine des câbles d'énergie et/ou de télécommunication.The invention finds a particularly advantageous, but not exclusive, application in the field of energy and / or telecommunication cables.

Il est à noter que dans l'ensemble de ce texte, un conducteur isolé désigne très généralement tout élément électriquement conducteur recouvert d'un élément électriquement isolant. Il est par ailleurs entendu que l'élément conducteur et/ou l'élément isolant peuvent avoir une structure simple ou composite. C'est ainsi que l'élément conducteur peut être constitué de plusieurs conducteurs électriques indépendants ou non, et que l'élément isolant peut être composé d'une pluralité de couches isolantes superposées.It should be noted that throughout this text, an insulated conductor very generally designates any electrically conductive element covered with an electrically insulating element. It is furthermore understood that the conductive element and / or the insulating element may have a simple or composite structure. Thus, the conductive element may consist of several independent electrical conductors or not, and that the insulating element may be composed of a plurality of superimposed insulating layers.

Quoi qu'il en soit, il est connu de regrouper plusieurs conducteurs isolés au sein d'une même gaine, afin de constituer un câble unique. La réalisation d'un tel ensemble s'effectue habituellement en extrudant la gaine autour des différents conducteurs isolés préalablement rassemblés en faisceau.In any case, it is known to group several insulated conductors within the same sheath, in order to constitute a single cable. The realization of such an assembly is usually carried out by extruding the sheath around the different insulated conductors previously gathered in a bundle.

Ce type de procédé de fabrication présente toutefois l'inconvénient de générer un collage entre la gaine et chaque conducteur isolé. Lors de l'extrusion, le matériau de gaine est en effet utilisé à l'état fondu et il est mis directement au contact du matériau isolant de chaque conducteur isolé. L'adhésion qui se produit entre les matériaux en question, rend alors le câble particulièrement difficile à dénuder ultérieurement. Cet état de fait apparaît d'autant plus problématique que la gaine doit être systématiquement retirée à l'extrémité du câble dès lors qu'un raccordement est envisagé.This type of manufacturing process however has the disadvantage of generating a bond between the sheath and each insulated conductor. During the extrusion, the sheath material is indeed used in the molten state and it is put directly in contact with the insulating material of each insulated conductor. The adhesion that occurs between the materials in question, then makes the cable particularly difficult to strip later. This fact appears all the more problematic that the sheath must be systematically removed at the end of the cable when a connection is envisaged.

Une solution connue pour résoudre ce problème de collage consiste à recouvrir de talc la surface extérieure de chaque conducteur isolé, préalablement à l'extrusion de la gaine. Mais cette opération s'avère peu pratique à mettre en oeuvre, en raison essentiellement du caractère pulvérulent du talc qui rend toute manipulation difficile et inévitablement salissante. Au final, cela pénalise la productivité de toute la chaîne de fabrication du câble. L'application de cette matière anti-adhérente requiert par ailleurs l'utilisation d'équipements spécifiques, ce qui a également pour conséquence d'impacter négativement le prix de revient du câble.A known solution to solve this gluing problem consists in covering the outer surface of each insulated conductor with talc, prior to the extrusion of the sheath. But this operation is impractical to implement, mainly because of the powderiness of talc that makes handling difficult and inevitably messy. In the end, it penalizes the productivity of the entire cable manufacturing chain. The application of this non-stick material also requires the use of specific equipment, which also has the effect of negatively impacting the cost price of the cable.

Une autre solution pour éviter le phénomène d'adhésion entre la gaine et les conducteurs isolés consiste à enduire la surface extérieure de chaque élément isolant avec une émulsion à base de silicone. Mais cette opération ne s'avère pas plus pratique à mettre en oeuvre que précédemment, en raison cette fois de la consistance huileuse de la matière anti-adhérente, qui rend l'application tout aussi difficile et salissante que dans la solution auparavant évoquée. Des équipements spécifiques sont par ailleurs là encore nécessaires. Au final, les conséquences en terme de productivité et de prix de revient sont sensiblement identiques à celles inhérentes à la mise en oeuvre de la première solution.Another solution to avoid the phenomenon of adhesion between the sheath and the insulated conductors is to coat the outer surface of each insulating member with a silicone emulsion. But this operation is not more convenient to implement than previously, this time because of the oily consistency of the release material, which makes the application as difficult and messy as in the previously mentioned solution. Specific equipment is also needed here. In the end, the consequences in terms of productivity and price of come back are substantially identical to those inherent in the implementation of the first solution.

On peut également citer le document EP-1 176 612 qui décrit un câble électrique avec une isolation bicouche dont le rapport d'épaisseur de la couche interne sur la couche externe est entre 50:50 et 70:30.We can also mention the document EP-1 176 612 which describes an electrical cable with a bilayer insulation whose thickness ratio of the inner layer to the outer layer is between 50:50 and 70:30.

Aussi le problème technique à résoudre, par l'objet de la présente invention, est de proposer un câble comportant au moins deux conducteurs isolés regroupés au sein d'une même gaine, chaque conducteur isolé comprenant un élément conducteur s'étendant à l'intérieur d'un élément isolant, câble qui permettrait d'éviter les problèmes de l'état de la technique en étant sensiblement moins onéreux à fabriquer, tout en demeurant facile à dénuder.Also the technical problem to be solved, by the object of the present invention, is to propose a cable comprising at least two insulated conductors grouped within the same sheath, each insulated conductor comprising a conductive element extending inside. an insulating element, cable that would avoid the problems of the prior art by being substantially less expensive to manufacture, while remaining easy to strip.

La solution au problème technique posé se trouve dans l'objet de la revendication 1.The solution to the technical problem is in the subject of claim 1.

Le terme peau désigne ici une couche extrêmement mince qui enveloppe individuellement un conducteur isolé et qui adhère fortement à la surface externe de l'élément isolant correspondant, surface avec laquelle ladite couche coopère par contact étroit. Mais en plus, cette peau présente ici avantageusement la propriété de ne pas adhérer à la surface interne de la gaine. Cette dernière peut par conséquent être dénudée très facilement, sans par ailleurs que l'intégrité des conducteurs isolés ne puisse être altérée.The term "skin" here designates an extremely thin layer which individually wraps an isolated conductor and which strongly adheres to the outer surface of the corresponding insulating element, the surface with which said layer cooperates by close contact. But in addition, this skin here advantageously has the property of not adhering to the inner surface of the sheath. The latter can therefore be stripped very easily, without furthermore that the integrity of the insulated conductors can not be altered.

L'invention concerne également un procédé de fabrication d'un câble tel que précédemment défini. Ce procédé est remarquable en ce qu'il comporte les étapes consistant à:

  • extruder l'élément isolant autour de chaque élément conducteur pour constituer chaque conducteur isolé,
  • extruder autour de chaque conducteur isolé une peau qui est solidaire de l'élément isolant correspondant et qui est anti-adhérente vis-à-vis de la gaine,
  • extruder la gaine autour de l'ensemble des conducteurs isolés préalablement rassemblés en faisceau.
The invention also relates to a method of manufacturing a cable as previously defined. This method is remarkable in that it comprises the steps of:
  • extruding the insulating element around each conductive element to form each insulated conductor,
  • extruding around each isolated conductor a skin which is integral with the corresponding insulating element and which is non-adherent with respect to the sheath,
  • extruding the sheath around all the insulated conductors previously gathered in bundle.

L'invention telle qu'ainsi définie présente l'avantage d'être significativement plus facile à mettre en oeuvre que les solutions de l'art antérieur, puisqu'elle ne nécessite qu'un appareillage classique de fabrication de câble, en l'occurrence un appareillage d'extrusion. La solution consistant à intercaler une peau doit ainsi permettre un gain de productivité de l'ordre de 10%, tout en garantissant la non adhésion entre la gaine et les différents conducteurs isolés.The invention as thus defined has the advantage of being significantly easier to implement than the solutions of the prior art, since it only requires conventional cable manufacturing equipment, in this case extrusion equipment. The solution of interposing a skin must thus allow a productivity gain of the order of 10%, while ensuring non-adhesion between the sheath and the individual insulated conductors.

La présente invention concerne également les caractéristiques qui ressortiront au cours de la description qui va suivre, et qui devront être considérées isolément ou selon toutes leurs combinaisons techniques possibles.The present invention also relates to the features which will emerge during the following description, which should be considered in isolation or in all their possible technical combinations.

Cette description, qui est destinée à mieux faire comprendre comment l'invention peut être réalisée, est donnée à titre d'exemple non limitatif et en référence à la figure unique qui illustre ... conforme à l'invention.This description, which is intended to better understand how the invention can be implemented, is given by way of non-limiting example and with reference to the single figure which illustrates ... according to the invention.

Pour des raisons de clarté, les mêmes éléments ont été désignés par des références identiques. De même, seuls les éléments essentiels pour la compréhension de l'invention ont été représentés, et ceci sans respect de l'échelle et de manière schématique.For the sake of clarity, the same elements have been designated by identical references. Likewise, only the essential elements for understanding the invention have been represented, and this without respect of the scale and schematically.

La figure unique représente donc un câble 1 composé de quatre conducteurs isolés 2 qui sont regroupés au sein d'une même gaine de protection 3. Dans cet exemple de réalisation, chaque conducteur isolé 2 est constitué par un élément conducteur 4 en cuivre s'étendant à l'intérieur d'un élément isolant 5 en polymère.The single FIGURE therefore represents a cable 1 composed of four insulated conductors 2 which are grouped together in the same protective sheath 3. In this embodiment, each insulated conductor 2 is constituted by a conductive element 4 of copper extending inside an insulating element 5 made of polymer.

Conformément à l'objet de la présente invention, chaque conducteur isolé 2 est par ailleurs recouvert d'une peau 6 qui est solidaire de son élément isolant 5 et qui est anti-adhérente vis-à-vis de la gaine 3.In accordance with the object of the present invention, each insulated conductor 2 is also covered with a skin 6 which is integral with its insulating element 5 and which is non-adherent with respect to the sheath 3.

A ce stade, et sous réserve que la peau 6 présente effectivement une bonne capacité d'adhésion vis-à-vis de chaque élément isolant 5 et des propriétés anti-adhérentes vis-à-vis de la gaine 3, toute combinaison de matériaux peut être envisagée pour constituer les différents éléments destinés à être en contact au sein du câble, à savoir chacun desdits éléments isolants 5, ladite peau 6 et ladite gaine 3. Selon l'invention chaque peau 6 présente une épaisseur de 0,05 à 0,2 mm.At this stage, and provided that the skin 6 actually has good adhesion to each insulating member 5 and anti-adherence properties vis-à-vis the sheath 3, any combination of materials can be envisaged to constitute the various elements intended to be in contact within the cable, namely each of said insulating elements 5, said skin 6 and said sheath 3. According to the invention, each skin 6 has a thickness of 0.05 to 0, 2 mm.

La peau 6 n'a ici pas d'autres fonctions que de constituer une interface entre chaque conducteur isolé 2 et la gaine 3. Ceci explique pourquoi son épaisseur s'avère si faible comparée à celle de chaque élément isolant 5 et/ou à celle de la gaine 3 qui sont plutôt de l'ordre du millimètre.The skin 6 here has no other function than to form an interface between each insulated conductor 2 and the sheath 3. This explains why its thickness is so low compared to that of each insulating element 5 and / or to that sheath 3 which are rather of the order of a millimeter.

Conformément à un premier mode de réalisation de l'invention, chaque peau 6 est ici à base de polypropylène.According to a first embodiment of the invention, each skin 6 is here based on polypropylene.

Utilisé sensiblement pur, ce matériau plastique offre l'avantage de présenter des propriétés anti-adhérentes significatives vis-à-vis de la plupart des matériaux qui sont communément utilisés pour constituer des gaines 3 dans le domaine de la câblerie. De plus, comme la température de fusion du polypropylène est plus élevée que la température de mise en oeuvre des matériaux de gaine en question, il n'y a pas de risque de collage lors de la formation de la gaine 3. Afin qu'il y ait par contre une bonne adhésion entre le polypropylène et chaque conducteur isolé 2, la peau 6 sera avantageusement formée en même temps que l'élément isolant 5 correspondant ; la solidarisation s'effectuant alors par interpénétration en surface des deux types de matériaux.Used substantially pure, this plastic material has the advantage of having significant anti-adhesive properties vis-à-vis most materials that are commonly used to form ducts 3 in the field of cable. In addition, since the melting temperature of the polypropylene is higher than the temperature of use of the sheath materials in question, there is no risk of sticking during the formation of the sheath 3. In order to on the other hand, there is a good adhesion between the polypropylene and each insulated conductor 2, the skin 6 will advantageously be formed at the same time as the corresponding insulating element 5; the joining then taking place by surface interpenetration of the two types of materials.

Selon une particularité de ce premier mode de réalisation, chaque élément isolant 5 est par ailleurs à base d'au moins une polyoléfine réticulée, et la gaine 3 est quant à elle à base d'au moins une polyoléfine chargée.According to a feature of this first embodiment, each insulating element 5 is also based on at least one crosslinked polyolefin, and the sheath 3 is based on at least one filled polyolefin.

En d'autres termes, chaque élément isolant 5 est réalisé à partir d'une composition comportant au moins une polyoléfine dont au moins une est réticulable. Cela signifie ensuite que la gaine 3 est quant à elle réalisée à partir d'une matrice de type polyoléfine dans laquelle est dispersée une charge organique, indépendamment d'ailleurs de la fonction de cette dernière.In other words, each insulating element 5 is made from a composition comprising at least one polyolefin of which at least one is crosslinkable. This then means that the sheath 3 is made from a polyolefin type matrix in which is dispersed an organic charge, independently of the function of the latter.

De manière particulièrement avantageuse, chaque élément isolant 5 est ici à base de polyéthylène réticulé.Particularly advantageously, each insulating element 5 is here based on crosslinked polyethylene.

Conformément à une autre caractéristique avantageuse, la gaine 3 est elle à base d'un mélange d'éthyl vinyl acétate et de polyéthylène.According to another advantageous characteristic, the sheath 3 is based on a mixture of ethyl vinyl acetate and polyethylene.

Toutes proportions peuvent à priori être envisagées entre les deux constituants du mélange destiné à constituer la gaine 3. La composition de gaine en question peut même intégrer classiquement une charge organique.All proportions can be envisaged a priori between the two constituents of the mixture intended to constitute the sheath 3. The cladding composition in question can even classically incorporate an organic filler.

Mais selon un second mode de réalisation de l'invention, chaque peau 6 peut également être réalisée à partir d'un mélange de polypropylène et de polychlorure de vinyle.But according to a second embodiment of the invention, each skin 6 can also be made from a mixture of polypropylene and polyvinyl chloride.

Dans cette hypothèse, la proportion de polypropylène par rapport au polychlorure de vinyle peut avantageusement varier de 5 à 30% dans le mélange composant la peau 6.In this case, the proportion of polypropylene with respect to the polyvinyl chloride may advantageously vary from 5 to 30% in the mixture comprising the skin 6.

Conformément à une particularité de ce second mode de réalisation, chaque élément isolant 5 est alors à base d'au moins un polymère halogéné, tandis que la gaine 3 est quant à elle à base d'au moins un polymère halogéné chargé.According to a feature of this second embodiment, each insulating element 5 is then based on at least one halogenated polymer, while the sheath 3 is based on at least one charged halogenated polymer.

De manière particulièrement avantageuse, chaque élément isolant 5 est à base de polychlorure de vinyle.Particularly advantageously, each insulating element 5 is based on polyvinyl chloride.

Conformément à une autre caractéristique avantageuse, la gaine 3 est à base de polychlorure de vinyle chargé.According to another advantageous characteristic, the sheath 3 is based on filled polyvinyl chloride.

Il est à noter ici que le polypropylène et le polychlorure de vinyle ne sont à priori pas compatibles, en ce sens qu'il ne peut y avoir théoriquement d'adhésion entre ces deux types de matériaux plastiques, notamment par interpénétration à l'état fondu. Il s'avère cependant qu'une peau 6 constituée d'un mélange de polypropylène et de polychlorure de vinyle tel que précédemment défini, est avantageusement en mesure d'adhérer à un élément isolant 5 en polychlorure de vinyle si les matériaux en question sont tous deux mis en contact à l'état fondu. Ainsi donc, pour ne pas qu'il y ait d'adhésion entre cette peau 6 et une gaine 3 en polychlorure de vinyle, il suffira de déposer cette dernière une fois seulement que ladite peau 6 ne sera plus à l'état fondu.It should be noted here that polypropylene and polyvinyl chloride are a priori not compatible, in that there can be theoretically adhesion between these two types of plastic materials, including interpenetration in the molten state . However, it turns out that a skin 6 made of a mixture of polypropylene and polyvinyl chloride as previously defined, is advantageously able to adhere to an insulating member 5 polyvinyl chloride if the materials in question are both brought into contact in the molten state. Thus, in order not to have adhesion between this skin 6 and a sheath 3 of polyvinyl chloride, it will suffice to deposit the latter only once that said skin 6 is no longer in the molten state.

De préférence, la composition de la gaine 3 est chargé avec de la craie. Cette caractéristique a essentiellement pour but de faire baisser le prix de revient de la gaine 3.Preferably, the composition of the sheath 3 is loaded with chalk. This characteristic is essentially intended to lower the cost price of the sheath 3.

Dans ce cas de figure, la composition de la gaine 3 peut comporter en outre avantageusement un plastifiant.In this case, the composition of the sheath 3 may further advantageously comprise a plasticizer.

L'invention concerne également un procédé de fabrication d'un câble 1 comportant au moins deux conducteurs isolés 2 regroupés au sein d'une même gaine 3, chaque conducteur isolé 2 comprenant un élément conducteur 4 s'étendant à l'intérieur d'un élément isolant 5.The invention also relates to a method of manufacturing a cable 1 comprising at least two insulated conductors 2 grouped together in the same sheath 3, each insulated conductor 2 comprising a conductive element 4 extending inside a insulating element 5.

Ce procédé de fabrication est remarquable en ce qu'il comporte les étapes consistant à:

  • extruder l'élément isolant 5 sur chaque élément conducteur 4 pour constituer chaque conducteur isolé 2,
  • extruder sur chaque conducteur isolé 2 une peau 6 qui est adhérente vis-à-vis de l'élément isolant 5 et qui est anti-adhérente vis-à-vis de la gaine 3,
  • extruder la gaine 3 autour de l'ensemble des conducteurs isolés 2 préalablement rassemblés en faisceau.
This manufacturing process is remarkable in that it comprises the steps of:
  • extruding the insulating element 5 on each conductive element 4 to constitute each insulated conductor 2,
  • extruding on each insulated conductor 2 a skin 6 which is adherent with respect to the insulating element 5 and which is non-adherent with respect to the sheath 3,
  • extruding the sheath 3 around all the insulated conductors 2 previously gathered in a bundle.

Le câble selon l'invention peut ainsi être réalisé avec des appareillages d'extrusion classiques, ce qui s'avère particulièrement avantageux en terme de coût de fabrication, comparativement aux procédés de l'état de la technique qui requiert d'onéreux équipements spécifiques.The cable according to the invention can thus be produced with conventional extrusion equipment, which proves to be particularly advantageous in terms of manufacturing cost, compared to the processes of the state of the art which requires expensive specific equipment.

Selon une particularité de ce procédé de fabrication, l'extrusion de chaque peau 6 est réalisée simultanément à l'extrusion de l'élément isolant 5 correspondant.According to a feature of this manufacturing process, the extrusion of each skin 6 is carried out simultaneously with the extrusion of the corresponding insulating element 5.

A cet égard, il est à noter que dans le domaine de la câblerie, il est relativement courant de réaliser de la co-extrusion, notamment lorsque l'on désire colorer un élément isolant de façon économique. Cela signifie que de nombreuses extrudeuses ont la capacité de déposer une fine couche de polymère à la surface d'un élément isolant. Ces appareillages peuvent par conséquent être avantageusement utilisés pour former la peau 6 à la surface de chaque conducteur isolé 2.In this regard, it should be noted that in the field of cabling, it is relatively common to perform coextrusion, especially when it is desired to color an insulating element economically. This means that many extruders have the ability to deposit a thin layer of polymer on the surface of an insulating member. These devices can therefore be advantageously used to form the skin 6 on the surface of each insulated conductor 2.

Claims (14)

  1. Cable (1) comprising at least two insulated conductors (2) grouped together within one same jacket (3), each insulated conductor (2) comprising a conductive element (4) extending inside an insulating element (5), each insulated conductor (2) is wrapped in a skin (6) having a narrower thickness than that of each insulating element (5) and/or than that of the jacket (3), characterized in that said skin (6) is joined to the insulating element (5) and is anti-adherent to the jacket (3) and has a thickness of 0.05 to 0.2 mm.
  2. The cable (1) according to claim 1, characterized in that the melting temperature of the skin (6) is higher than the forming temperature of the jacket (3).
  3. The cable (1) according to claim 1 or 2, characterized in that each skin (6) is made of polypropylene.
  4. The cable (1) according to any of claims 1 to 3, characterized in that each insulating element (5) is made of at least one cross-linked polyolefin, and in that the jacket (3) is made of at least one filled polyolefin.
  5. The cable (1) according to claim 4, characterized in that each insulating element (5) is made of cross-linked polyethylene.
  6. The cable (1) according to claim 4 or 5, characterized in that the jacket (3) is made of a mixture of ethyl vinyl acetate and polyethylene.
  7. The cable (1) according to any of the preceding claims, characterized in that each skin (6) is made of a mixture of polypropylene and polyvinyl chloride.
  8. The cable (1) according to claim 7, characterized in that the proportion of polypropylene in the mixture composing the skin (6) is 5 to 30 %.
  9. The cable (1) according to one of claims 7 or 8, characterized in that each insulating element (5) is made of at least one halogenated polymer, and in that the jacket (3) is made of at least one filled halogenated polymer.
  10. The cable (1) according to claim 9, characterized in that each insulator (5) is made of polyvinyl chloride.
  11. The cable (1) according to one of claims 9 or 10, characterized in that the jacket (3) is made of filled polyvinyl chloride.
  12. The cable (1) according to any of claims 9 to 11, characterized in that the composition of the jacket (3) is filled with chalk.
  13. Method for manufacturing a cable (1) comprising at least two insulated conductors (2) grouped together within one same jacket (3), each insulated conductor (2) comprising a conductive element (4) extending inside an insulating element (5), characterized in that said method comprises the steps of:
    - extruding the insulating element (5) around each conductive element (4) to form each insulated conductor (2);
    - around each insulated conductor (2), extruding a skin (6) having a narrower thickness than that of each insulating element (5) and/or than that of the jacket (3), and being joined to the corresponding insulating element (5) and anti-adherent to the jacket (3), said skin (6) having a thickness of 0.05 to 0.2 mm;
    - extruding the jacket (3) around the assembly of insulated conductors (2) previously assembled in a bundle.
  14. The manufacturing method according to claim 13, characterized in that the extrusion of each skin (6) is performed simultaneously with the extrusion of the corresponding insulating element (5).
EP05300448.7A 2004-06-07 2005-06-02 Cable comprising a plurality of insulated conductors contained in the same jacket and manufacturing method of the cable. Not-in-force EP1605474B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0406090A FR2871285B1 (en) 2004-06-07 2004-06-07 CABLE COMPRISING SEVERAL ISOLATED CONDUCTORS ENVELOPED IN THE SAME SHEATH AND METHOD OF MANUFACTURING SUCH A CABLE
FR0406090 2004-06-07

Publications (3)

Publication Number Publication Date
EP1605474A2 EP1605474A2 (en) 2005-12-14
EP1605474A3 EP1605474A3 (en) 2006-02-22
EP1605474B1 true EP1605474B1 (en) 2018-03-14

Family

ID=34942639

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05300448.7A Not-in-force EP1605474B1 (en) 2004-06-07 2005-06-02 Cable comprising a plurality of insulated conductors contained in the same jacket and manufacturing method of the cable.

Country Status (6)

Country Link
US (1) US7586044B2 (en)
EP (1) EP1605474B1 (en)
CA (1) CA2508499A1 (en)
ES (1) ES2673175T3 (en)
FR (1) FR2871285B1 (en)
NO (1) NO20052667L (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2933228A1 (en) * 2008-06-26 2010-01-01 Nexans ELECTRICALLY INSULATING TUBING LAYER FOR ELECTRIC CABLE
WO2014031313A2 (en) * 2012-08-20 2014-02-27 Boston Scientific Scimed, Inc. Electronic cable assemblies for use with medical devices
CN104282363A (en) * 2013-07-08 2015-01-14 沈阳岳阳电缆有限公司 High-strength mobile type cable
CN103854741A (en) * 2014-02-24 2014-06-11 安徽卓越电缆有限公司 Direct-current traction compensation cable

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59117549A (en) * 1982-12-23 1984-07-06 Sumitomo Electric Ind Ltd Flame-retardant low-smoking polyolefin resin composition
GB2161644B (en) * 1984-07-09 1987-11-11 Pirelli General Plc Flexible electric cable
ES2018706B3 (en) * 1987-03-13 1991-05-01 Der Groep Lambertus Adrianus Van POLYMER COMPOSITION, A PROCEDURE FOR OBTAINING A POLYMER COMPOSITION AND THE USE OF SUCH COMPOSITION.
FR2764104B1 (en) * 1997-06-02 1999-07-30 Alsthom Cge Alcatel HIGH FREQUENCY DATA TRANSMISSION CABLE, AND METHOD AND APPARATUS FOR MANUFACTURING THE SAME
US6392153B1 (en) * 1998-12-18 2002-05-21 Equistar Chemicals, Lp Electrical conductive assembly
DE10036610A1 (en) * 2000-07-27 2002-02-07 Alcatel Sa Flexible electrical cable for drag chains

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US20050274539A1 (en) 2005-12-15
ES2673175T3 (en) 2018-06-20
FR2871285B1 (en) 2006-09-08
FR2871285A1 (en) 2005-12-09
NO20052667D0 (en) 2005-06-03
EP1605474A3 (en) 2006-02-22
NO20052667L (en) 2005-12-05
EP1605474A2 (en) 2005-12-14
CA2508499A1 (en) 2005-12-04
US7586044B2 (en) 2009-09-08

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