EP1388867B1 - Câble électrique - Google Patents

Câble électrique Download PDF

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Publication number
EP1388867B1
EP1388867B1 EP03291690A EP03291690A EP1388867B1 EP 1388867 B1 EP1388867 B1 EP 1388867B1 EP 03291690 A EP03291690 A EP 03291690A EP 03291690 A EP03291690 A EP 03291690A EP 1388867 B1 EP1388867 B1 EP 1388867B1
Authority
EP
European Patent Office
Prior art keywords
layer
electrical cable
production
cable
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.)
Expired - Lifetime
Application number
EP03291690A
Other languages
German (de)
English (en)
Other versions
EP1388867A1 (fr
Inventor
Franz Dänekas
Marc Strittmatter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nexans SA
Original Assignee
Nexans SA
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 Nexans SA filed Critical Nexans SA
Publication of EP1388867A1 publication Critical patent/EP1388867A1/fr
Application granted granted Critical
Publication of EP1388867B1 publication Critical patent/EP1388867B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
    • 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
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/1875—Multi-layer sheaths
    • H01B7/188—Inter-layer adherence promoting means

Definitions

  • the invention relates to an electrical cable according to the preamble of patent claim 1 and a method for producing an electrical cable according to the preamble of claims 5 and 7.
  • an electrical cable which consists of a conductor and a surrounding the conductor plastic jacket.
  • the plastic jacket is made up of two layers of different material.
  • the plastic jacket consists of an inner layer of polyethylene and an outer layer of polypropylene.
  • the plastic shell has an inner layer of soft PVC and an outer layer of rigid PVC.
  • the outer layer should be resistant to abrasion when the cable is pulled into cable ducts.
  • a primer layer is composed, which is composed of a homogeneous mixture of the materials of the inner and outer layer.
  • WO 02/15202 From the WO 02/15202 is known in the water and in a humid environment laying cable with polyethylene jacket known which surrounds a cable core and on which a fire protection layer is extruded.
  • the material of the fire protection layer is flame retardant, adheres well to the polyethylene jacket and is halogen free.
  • the flame retardancy of the fire protection layer is achieved by adding special flame retardant fillers or additives to an ethylene copolymer.
  • the polyethylene sheath and the fire protection layer are produced in one work step.
  • Highly filled plastic mixtures ie those having more than 100 parts of filler per 100 parts of base material, are extrudable but, even if the base material is an ethylene copolymer, they have little adhesion to a clad surface of polyethylene when the cladding layer and the highly filled mixture are extruded in two steps. Although a good adhesion between the two layers is achievable in the case of coextrusion of the cladding and the fire protection layer, it is necessary to resort to flame retardants whose flame-retardant reaction begins at temperatures above that used for the high melt temperature during the processing of the HDPE normally used for cable sheaths the melt temperature of the HDPE is.
  • the present invention is therefore based on the object to improve the known cable to the effect that the outer fire protection layer has a much improved property in case of fire and improved adhesion to the underlying polyethylene jacket, and the possibility is given to use almost all commercially available halogen-free flame retardants ,
  • Figure 1 shows a side section through a cable according to the teachings of the invention.
  • the cable has a cable core 1, which may for example comprise one or more insulated electrical conductors.
  • the electrical conductors as known per se, have an inner and an outer conductive layer in addition to the insulation. Over the outer conductive layer can still be provided a metallic shield.
  • the cable core 1 is surrounded by a cable sheath 2, which consists of a first inner layer 2a made of polyethylene and a second outer layer 2b, which is flame retardant and consists of a highly filled thermoplastically processable plastic mixture. Between the first and the second layer, a third layer 2c is provided, which covers the outer surface of the layer 2a over the entire surface. This third layer 2c consists of a bonding agent, which establishes an intimate connection between the first and the second layer.
  • the material of the first layer is pure polyethylene without appreciable additives.
  • This mixture has an oxygen index of 25-36%.
  • the third layer is a copolymer of ethylene, which is available, for example, under the trade name Lotryl 18 MA 02.
  • the copolymer is preferably a Farbstoffmasterbatch added, which z. B. under the trade name Plasblack PE 4470 is available.
  • the mixing ratio is about 99 parts copolymer to 1 part dye masterbatch.
  • the first and third layers are preferably extruded onto the cable core in the coextrusion process.
  • the second layer can be extruded in the same operation directly on the still warm third layer. But it is also possible to apply the second layer in a subsequent operation.
  • the third layer may also be formed by longitudinally laying or winding a film of a copolymer of ethylene onto the first layer.
  • the film fuses with both the first and second layers due to the heat of extrusion produced by the extrusion of the second layer.
  • FIG. 2 shows a side view of a production device.
  • the running of a storage drum 3 cable core 1 is fed to a first extruder 4.
  • the extruder 4 is a so-called coextrusion extruder, to which the material of the first layer is fed via a first screw 4a and the material of the third layer via a second screw 4b.
  • the layers 2a and 2c are fed in concentric arrangement to the mouthpiece 4c of the extruder 4.
  • the cable core provided with the layers 2a and 2c now passes into a second extruder 5, which extrudes the second layer 2b onto the third layer 2c.
  • the now finished cable 6 is fed to a cooling tank 7 and wound onto a cable drum 8.
  • the extrusion rate of the second extruder 5 may be less than 50% of the extrusion rate of the extruder 4, it may be advantageous to apply the second layer 2b in a separate operation.
  • the adhesion between the first and the second layer was based on IEC. 19.21 and a value of 21 N determined.

Landscapes

  • Insulated Conductors (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Inorganic Insulating Materials (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Ropes Or Cables (AREA)

Claims (8)

  1. Câble électrique qui présente une âme de câble (1) et une gaine (2) entourant l'âme de câble (1), la gaine se composant d'une première couche interne (2a) en polyéthylène, d'une deuxième couche externe (2b) en un copolymère de l'éthylène et qui est rendue ignifuge par l'addition de charges ou d'additifs spéciaux ignifuges et d'une troisième couche (2c) disposée entre la première couche interne (2a) et la deuxième couche externe (2b) en un agent promoteur de l'adhésion en éthylène-acétate de vinyle (EVA), en éthylène-acrylate de butyle (EBA) ou en éthylène-acrylate de méthyle (EMA).
  2. Câble électrique selon la revendication 1, caractérisé en ce que la première couche (2a) se compose d'un polyéthylène de densité élevée (HDPE) .
  3. Câble électrique selon la revendication 1 ou 2, caractérisé en ce que la troisième couche (2c) présente une épaisseur de paroi de moins de 0,2 mm.
  4. Câble électrique selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la troisième couche (2c) se compose de 95-99 parts d'éthylène-acétate de vinyle et de 1 à 5 parts d'un lot-maître de colorants, par exemple, de polyéthylène et de noir de fumée.
  5. Procédé de fabrication d'un câble électrique selon l'une quelconque des revendications 1 à 4, caractérisé en ce que sur l'âme du câble (1) dans une première étape de travail, on applique par coextrusion la première et la troisième couches (2a, 2c) et en ce que, dans une deuxième étape de travail, on procède à l'extrusion par dessus de la deuxième couche externe chargée (2b).
  6. Procédé selon la revendication 5, caractérisé en ce que la deuxième couche externe chargée (2b) subit une extrusion, lors de la même phase de travail que la première et la troisième couche (2a, 2c), sur la troisième couche non refroidie, encore chaude (2c).
  7. Procédé de fabrication d'un câble électrique selon l'une quelconque des revendications 1 à 4, caractérisé en ce que, sur la première couche (2a), on applique, en direction longitudinale ou par enroulement, la troisième couche (2c) sous la forme d'une feuille de l'agent promoteur de l'adhésion et en ce que l'on extrude la deuxième couche (2b) sur la troisième couche (2c).
  8. Procédé selon la revendication 7, caractérisé en ce que la feuille se compose d'un agent promoteur de l'adhésion ayant un domaine de fusion compris entre 70°C et 100°C.
EP03291690A 2002-08-08 2003-06-08 Câble électrique Expired - Lifetime EP1388867B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10236288 2002-08-08
DE10236288A DE10236288A1 (de) 2002-08-08 2002-08-08 Elektrisches Kabel

Publications (2)

Publication Number Publication Date
EP1388867A1 EP1388867A1 (fr) 2004-02-11
EP1388867B1 true EP1388867B1 (fr) 2007-08-01

Family

ID=30128769

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03291690A Expired - Lifetime EP1388867B1 (fr) 2002-08-08 2003-06-08 Câble électrique

Country Status (4)

Country Link
EP (1) EP1388867B1 (fr)
AT (1) ATE368927T1 (fr)
DE (2) DE10236288A1 (fr)
DK (1) DK1388867T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2870542A1 (fr) * 2004-05-21 2005-11-25 Nexans Sa Composition polymerique chargee resistante au feu et revetement isolant de cable la contenant
JP4846991B2 (ja) * 2004-06-03 2011-12-28 株式会社オートネットワーク技術研究所 被覆電線
FR3024388B1 (fr) * 2014-07-31 2016-08-26 Schneider Electric Ind Sas Pieces extrudees en matiere plastique comprenant un revetement ignifuge adherent et leur procede de preparation.
CN104599768B (zh) * 2014-08-27 2017-01-25 国网山东省电力公司沂水县供电公司 一种发光电缆
CN112397228A (zh) * 2019-08-15 2021-02-23 江苏亨通电力电缆有限公司 电气化铁路用b1级单相交流电缆及其制备方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3173390D1 (en) * 1980-10-10 1986-02-13 Raydex Int Ltd Cable having a sheath surrounding a conductor
DE3537221A1 (de) * 1985-10-17 1987-04-23 Siemens Ag Flammwidrig und halogenfrei ausgebildete isolierung
JPS6378409A (ja) * 1986-09-19 1988-04-08 株式会社フジクラ ケ−ブルのシ−ス形成方法
AU606179B2 (en) * 1987-07-29 1991-01-31 Kendall Company, The An adhesive tape
DE69204835T2 (de) * 1991-05-24 1996-04-04 Dow Chemical Co Elastomerische sperrfilme für reifen.
DE19517392A1 (de) * 1995-05-11 1996-11-14 Siemens Ag Optisches Kabel mit mindestens einer Schutzschicht aus hitzebeständigem Material
DE19620963A1 (de) * 1996-05-24 1997-11-27 Alcatel Kabel Ag Brandsicheres elektrisches Kabel oder brandsichere elektrische Leitung und Verfahren zur Herstellung
DE60013196T2 (de) * 1999-04-03 2005-08-11 Pirelli & C. S.P.A. Raucharmes selbstlöschendes elektrisches Kabel und flammwidrige Zusammensetzung
DE10131569B4 (de) * 2000-08-12 2019-05-23 Südkabel GmbH Kabel mit Polyethylenmantel und Verfahren zur Herstellung eines Kabels

Also Published As

Publication number Publication date
DE50307802D1 (de) 2007-09-13
ATE368927T1 (de) 2007-08-15
DK1388867T3 (da) 2007-10-29
EP1388867A1 (fr) 2004-02-11
DE10236288A1 (de) 2004-02-26

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