EP0002397A1 - Feuerverzögerndes elektrisches Kabel und Verfahren zu dessen Herstellung - Google Patents

Feuerverzögerndes elektrisches Kabel und Verfahren zu dessen Herstellung Download PDF

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Publication number
EP0002397A1
EP0002397A1 EP78400154A EP78400154A EP0002397A1 EP 0002397 A1 EP0002397 A1 EP 0002397A1 EP 78400154 A EP78400154 A EP 78400154A EP 78400154 A EP78400154 A EP 78400154A EP 0002397 A1 EP0002397 A1 EP 0002397A1
Authority
EP
European Patent Office
Prior art keywords
cable
layer
powder
ignition
ignition product
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.)
Granted
Application number
EP78400154A
Other languages
English (en)
French (fr)
Other versions
EP0002397B1 (de
Inventor
Jean-Marie Guilhaumou
Paul Reumont
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.)
Thomson-Brandt SA
Original Assignee
Thomson-Brandt 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9198504&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0002397(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Thomson-Brandt SA filed Critical Thomson-Brandt SA
Publication of EP0002397A1 publication Critical patent/EP0002397A1/de
Application granted granted Critical
Publication of EP0002397B1 publication Critical patent/EP0002397B1/de
Expired 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
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame

Definitions

  • the present invention relates to an electric cable resistant to the propagation of fire, and to a method of manufacturing such a cable.
  • Known electrical cables generally consist of an assembly formed of insulated and assembled conductors, and of an outer sheath of plasticized polyvinyl chloride. These cables are usually flammable and contribute to a fire, the extension of it.
  • the chlorine level of the mixture can also be increased by adding chlorinated compounds such as chlorinated paraffins.
  • a cable comprises a certain number of insulated conductors whose insulation material is flammable, such as crosslinked polyethylene for example, assembled in a bundle and covered with a sheath of polyvinyl chloride or elastomer, it can happen that the protection provided by this sheath is not sufficient in the event of a fire and the cable is completely destroyed.
  • insulation material such as crosslinked polyethylene for example
  • the present invention aims to avoid these drawbacks, enables a p erfec- tioned electric cable having excellent fire resistance and the spread thereof, and relates to a manufacturing method of such a cable .
  • An electric cable resistant to the spread of fire provided with a set of electrically insulated conductors and assembled, and an outer sheath of protection in plasticized polyvinyl chloride, is characterized in that it comprises, between this set of insulated conductors and the outer protective sheath, at least one layer of anti-ignition product in powder form.
  • a known electrical cable comprises a set of 19 conductors of 1.5 mm 2 insulated by chemically crosslinked polyethylene and assembled. Over this set, we extruded a polyvinyl chloride sheath, the composition of which comprises antimony oxide and chlorinated paraffins. In a test, in accordance with the operating mode (2-2) of French Standard NF C 32070 of May 1971 and additive n ° 1, carried out in an electric oven described in this standard, the cable known above is completely destroyed .
  • a cable 1 produced in accordance with the invention illustrated schematically in the drawing comprises, like. known cables, a set of one or more conductors 2 insulated by a coating of crosslinked polyethylene, or a material based on ethylene propylene, natural or synthetic rubber or polyvinyl chloride and an outer sheath 3 in material such as polychloride vinyl, polychloroprene, chlorinated polyethylene or a material usually used in the production of this sheath.
  • the electric cable 1 comprises, between its set of insulated conductors 2 and its outer sheath 3, at least one layer of pulverulent anti-ignition product 4, that is to say a product in the form a powder which in its decomposition under the action of heat, releases active compounds or elements which do not maintain the flame and prevent its propagation.
  • This pulverulent anti-ignition product is constituted for example by a powder of halogenated product or compound, such as polyvinyl chloride, chlorinated polyethylenes, or by that of a brominated compound such as decabromodiphenyl) ether, octabromodiphenyl. .
  • a method for manufacturing an electric cable 1 resistant to the propagation of the above flame comprises at least one covering of a set of insulated conductors 2 with a layer of silicone emulsion 5, a formation a layer of powder of anti-ignition product 4 on this layer of silicone emulsion 5 and of a winding of a layer of plastic tape 6 on this layer of anti-ignition product powder 4, before carrying out an extrusion of a outer protective sheath 3 of the cable.
  • the formation of the silicone emulsion layer 5 on the set of conductors 2 can be carried out by spraying this emulsion by means of a gun, not shown.
  • the establishment of the anti-ignition powder layer 4 is preferably carried out by electrostatic means. For this purpose, a voltage of a hundred kilovolts is applied between the set of insulated conductors 2 coated with a layer of silicone emulsion, and a gun, not shown, for spraying the anti-ignition powder.
  • the pulverulent form of the layer of anti-ignition product ensures the cable of the invention by its faster decomposition in the presence of heat, better resistance to the propagation of the flame while contributing to give by its divided form, to this cable, a great mechanical flexibility.
  • the silicone emulsion layer makes it possible to maintain a homogeneous layer of anti-ignition powder in place: for the entire length of the cable.
  • the layer of tape outside the powder layer of anti-ignition product, contributes to strengthening the retention in place of this powder layer and protects it during the extrusion of the outer sheath of the cable.
  • the electric cable comprises a set of isolated conductors which are individually coated with a layer of powder of anti-ignition product and between this set and the outer sheath of the cable another layer of anti-inflammation product.
  • an electrical cable comprises a set of 19 conductors of ..5 mm 2 insulated by chemically crosslinked polyethylene, covered, from the inside to the outside, by an emulsion layer.
  • silicone a layer of polyvinyl chloride powder, a layer of polyester tape, an outer protective sheath of polyvinyl chloride.

Landscapes

  • Insulated Conductors (AREA)
EP78400154A 1977-12-06 1978-10-27 Feuerverzögerndes elektrisches Kabel und Verfahren zu dessen Herstellung Expired EP0002397B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7736704A FR2411475A1 (fr) 1977-12-06 1977-12-06 Cable electrique resistant a la propagation de l'incendie, et procede de fabrication d'un tel cable
FR7736704 1977-12-06

Publications (2)

Publication Number Publication Date
EP0002397A1 true EP0002397A1 (de) 1979-06-13
EP0002397B1 EP0002397B1 (de) 1980-08-06

Family

ID=9198504

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78400154A Expired EP0002397B1 (de) 1977-12-06 1978-10-27 Feuerverzögerndes elektrisches Kabel und Verfahren zu dessen Herstellung

Country Status (4)

Country Link
EP (1) EP0002397B1 (de)
DE (1) DE2860122D1 (de)
FR (1) FR2411475A1 (de)
IT (1) IT1202803B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0809261A3 (de) * 1996-05-24 1998-06-03 Alcatel Brandsicheres elektrisches Kabel oder brandsichere elektrische Leitung und Verfahren zur Herstellung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2966496D1 (en) * 1978-11-07 1984-01-26 Cables De Lyon Geoffroy Delore Flame retardant insulating material for an electrical cable and electrical cable made with such a material
EP0076560B1 (de) * 1981-09-30 1986-10-08 Northern Telecom Limited Nachrichtenkabel für Innenverlegung
US4562302A (en) * 1981-10-05 1985-12-31 Northern Telecom Limited Inside telecommunication cable

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2008293A1 (de) * 1968-05-11 1970-01-16 Kabel Metallwerke Ghh
FR2310619A1 (fr) * 1975-05-05 1976-12-03 Northern Telecom Ltd Procede de fabrication d'un conducteur electrique isole thermiquement et revetu de polymere et conducteur ainsi obtenu

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA459789A (en) * 1949-09-20 W. Duggan Fred Flameproof elastomer and electrical insulation thereof
US3005038A (en) * 1958-12-31 1961-10-17 Mc Graw Edison Co High temperature radio frequency cable and method of making the same
DE2025351C3 (de) * 1970-05-23 1974-08-15 Kabel- Und Metallwerke Gutehoffnungshuette Ag, 3000 Hannover Schutzhülle gegen Hitze- und Feuereinwirkung von außen für Rohrbündelkabel
CA974682A (en) * 1970-07-08 1975-09-16 Charles F. Raley (Jr.) Flame retardant olefin polymer composition
BE787171A (fr) * 1971-08-13 1973-02-05 Cables De Lyon Geoffroy Delore Procede de fabrication d'une barriere d'etancheite pour cable electrique
GB1427729A (en) * 1972-09-04 1976-03-10 Pyrotenax Ltd Method of manufacturing a mineral insulated electric cable
CA1011020A (en) * 1973-02-08 1977-05-24 Bruno L. Gaeckel Flame resistant polyethylene composition

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2008293A1 (de) * 1968-05-11 1970-01-16 Kabel Metallwerke Ghh
FR2310619A1 (fr) * 1975-05-05 1976-12-03 Northern Telecom Ltd Procede de fabrication d'un conducteur electrique isole thermiquement et revetu de polymere et conducteur ainsi obtenu

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0809261A3 (de) * 1996-05-24 1998-06-03 Alcatel Brandsicheres elektrisches Kabel oder brandsichere elektrische Leitung und Verfahren zur Herstellung

Also Published As

Publication number Publication date
IT1202803B (it) 1989-02-09
EP0002397B1 (de) 1980-08-06
DE2860122D1 (en) 1980-11-27
IT7830536A0 (it) 1978-12-05
FR2411475B1 (de) 1980-08-22
FR2411475A1 (fr) 1979-07-06

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