EP3828900A1 - Kabel mit feuerbeständiger schicht - Google Patents

Kabel mit feuerbeständiger schicht Download PDF

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Publication number
EP3828900A1
EP3828900A1 EP20208863.9A EP20208863A EP3828900A1 EP 3828900 A1 EP3828900 A1 EP 3828900A1 EP 20208863 A EP20208863 A EP 20208863A EP 3828900 A1 EP3828900 A1 EP 3828900A1
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EP
European Patent Office
Prior art keywords
cable
fire
solid composition
electrically conductive
resistant layer
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.)
Pending
Application number
EP20208863.9A
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English (en)
French (fr)
Inventor
Christophe Brismalein
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 EP3828900A1 publication Critical patent/EP3828900A1/de
Pending 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
    • 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
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/025—Other inorganic material
    • 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
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/04—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances mica
    • 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
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/10—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances metallic oxides

Definitions

  • the present invention relates to a cable comprising at least one elongated electrically conductive element, and at least one organic-inorganic fire resistant hybrid layer based on an aluminosilicate surrounding said elongated electrically conductive element, said fire resistant layer being a contact layer.
  • a cable comprising at least one elongated electrically conductive element, and at least one organic-inorganic fire resistant hybrid layer based on an aluminosilicate surrounding said elongated electrically conductive element, said fire resistant layer being a contact layer.
  • safety cables typically but not exclusively applies to fire-resistant safety cables, in particular halogen-free, capable of operating for a given period of time under fire conditions, without being a fire propagator or generator of significant smoke.
  • safety cables are in particular power transmission cables, or low-frequency transmission cables, such as control or signaling cables, in particular in the railway field and / or for use in underground metropolitan networks.
  • An electric cable may comprise one or more elongated electrically conductive elements, and optionally one or more elongated optical conductive elements (s), one or more electrically insulating layer (s), and an outer protective sheath intended to mechanically protect the underlying elements of said cable.
  • the materials that can be used to improve the fire resistance of one of the layers or of the protective sheath of said cable are composite materials based on polymers, in particular silicone polymers, and flame retardant fillers. Despite the presence of such fillers, fire resistance is not always fully satisfactory.
  • so-called "fire-resistant" cables are cables configured to be able to continue to operate with acceptable performance even if, in the event of a fire, they are directly exposed to flames for a period of time. a certain time, at temperatures of 750 ° C to 900 ° C or even at higher temperatures.
  • a fire resistant cable comprising an elongated electrically conductive element surrounded by an inorganic braid made of a ceramic or a high temperature glass, the inorganic braid being surrounded by a layer of a polymer ceramifiable such as silicone rubber which turns into ceramic at high temperatures corresponding to fire conditions.
  • the inorganic braid and the ceramifiable layer have a not insignificant bulk, and the mechanical and fire resistance properties are not optimized.
  • the aim of the present invention is to provide a cable, in particular an electric cable, exhibiting improved fire resistance, good mechanical properties, in particular in terms of flexibility, and preferably having reduced bulk.
  • the first object of the invention is a cable comprising at least one elongated electrically conductive element, and at least one fire resistant layer surrounding said elongated electrically conductive element, characterized in that said fire resistant layer is in direct physical contact with said element elongated electrically conductive, and in that said fire-resistant layer is obtained by heat treatment of a powdery solid composition comprising at least one aluminosilicate.
  • the fire-resistant layer of the cable of the invention in direct physical contact with said elongated electrically conductive element, said layer being obtained by heat treatment of a powder composition comprising at least one aluminosilicate, the cable exhibits improved fire resistance. , and reduced bulk. Furthermore, said cable can be used as a telecommunication cable. Finally, the cable of the invention has, at the end of its manufacture, all the properties to withstand a fire or lower temperatures than those reached in the event of a fire, which is not the case with cables based on ceramic layer (s). In fact, such cables require a transformation of the ceramifiable layer into a ceramic layer during a fire in order to allow fire resistance and cracks can be created during the transformation of the ceramifiable layer into ceramic at high temperature.
  • the fire resistant layer is the fire resistant layer
  • the expression “in direct physical contact” means that no layer of any kind whatsoever comes between said elongated electrically conductive element and said fire-resistant layer.
  • the cable does not include any intermediate layer (s), in particular layer (s) comprising at least one polymer, positioned between said elongated electrically conductive member and said fire resistant layer.
  • the fire-resistant layer of the cable of the invention is in particular intended to withstand a fire or high temperatures corresponding to fire conditions.
  • the fire resistant layer of the cable of the invention is preferably an organic-inorganic hybrid layer.
  • it includes both inorganic and organic constituents.
  • This hybrid character makes it possible to give said layer properties of fire resistance and flexibility.
  • the expression “inorganic component” means a component free from carbon-hydrogen bond (s), and / or the expression “inorganic component” means a component integrating one or more metal atoms in its structure.
  • the expression “organic constituent” means a constituent which is not inorganic.
  • the fire-resistant layer of the cable of the invention is obtained by heat treatment of a solid pulverulent composition.
  • the heat treatment allows the solid powdery composition to be fixed around the elongated electrically conductive element in the form of a fire resistant layer.
  • the heat treatment of the solid pulverulent composition is preferably carried out at a temperature of at most approximately 500 ° C, particularly preferably at most approximately 400 ° C, more particularly preferably at most approximately 300 ° C. , and even more particularly preferably at most approximately 200 ° C.
  • the heat treatment of the pulverulent solid composition can be carried out at a temperature of at least approximately 180 ° C, particularly preferably at least approximately 190 ° C, and more particularly preferably at least approximately 200 ° C. .
  • the heat treatment of the solid pulverulent composition is preferably carried out for a period ranging from 1 min to approximately 2 h, particularly preferably ranging from 5 min to approximately 1 hour, more particularly preferably ranging from 10 min to 45 min approximately.
  • the fire-resistant layer of the cable of the invention is preferably not (or is preferably different from) a ceramic layer and / or a layer obtained by sintering or by melting inorganic constituents.
  • the fire-resistant layer of the cable of the invention is preferably not (or is preferably different from) a ceramifiable polymer layer.
  • the fire-resistant layer can be obtained by heat treatment using a tube furnace, a row of heating ceramic heating parts, or any other continuous heating technique (UV, IR, etc.) .
  • the fire-resistant layer is obtained by heat treatment of the powdery solid composition at atmospheric pressure.
  • the fire resistant layer preferably has a rough appearance.
  • the fire-resistant layer of the cable of the invention may have a thickness ranging from 5 to 200 ⁇ m approximately, preferably from 50 to 175 ⁇ m approximately, and particularly preferably from 75 to 150 ⁇ m approximately.
  • the thickness of said fire resistant layer has no significant impact on the diameter of the cable, which has a great advantage in terms of cable design.
  • Said fire resistant layer is preferably an electrically insulating layer.
  • the expression “electrically insulating layer” means a layer whose electrical conductivity can be at most 1.10 -8 S / m (siemens per meter) approximately, preferably at most 1.10 -9 S / m, and particularly preferably at most 1.10 -10 S / m (Siemens per meter), measured at 25 ° C in direct current.
  • the fire-resistant layer is preferably an electrically insulating layer, it generally does not comprise particles of conductive metal at zero oxidation degree and / or conductive charges.
  • the fire-resistant layer preferably does not include polymeric materials based on silicon and oxygen such as polyorganosiloxanes or rubbers or silicone resins.
  • the powdery solid composition is a solid composition.
  • the powdery solid composition is a composition which is solid at room temperature, for example at a temperature ranging from 18 to 25 ° C. approximately.
  • the expression “powdery solid composition” means that the composition is in the form of a powder.
  • the pulverulent solid composition may be in the form of a powder with particles with a size ranging from approximately 1 to 200 ⁇ m, and preferably ranging from approximately 5 to 100 ⁇ m.
  • the term “dimension” means the number-average dimension of all the particles of a given population, this dimension being conventionally determined by well-known methods of the person skilled in the art.
  • the size of the particle or particles according to the invention can for example be determined by microscopy, in particular by scanning electron microscope (SEM) or by transmission electron microscope (TEM).
  • the powdery solid composition comprises at least one aluminosilicate.
  • the powdery solid composition comprises at least 5% by weight approximately of said aluminosilicate, preferably at least 7.5% by weight approximately of said aluminosilicate, and particularly preferably at least 10% by weight approximately of said aluminosilicate, relative to the total weight of said powdery solid composition.
  • the powdery solid composition may comprise at most 40% by weight approximately of the aluminosilicate, preferably at most 30% by weight approximately. of said aluminosilicate, and particularly preferably at most approximately 25% by weight of said aluminosilicate, relative to the total weight of said powdery solid composition.
  • the aluminosilicate is preferably mica, and particularly preferably muscovite type mica.
  • the powdery solid composition can further comprise at least one polymeric material.
  • the polymer material is preferably chosen from epoxy resins.
  • the epoxy resins can represent at least 50% by weight approximately of the total weight of polymeric material of the powdery solid composition, preferably at least 75% by weight approximately of the total weight of polymer material of the powdery solid composition, and particularly preferably at least about 90% by weight of the total weight of polymeric material of the powdery solid composition.
  • the polymer material is chosen from cycloaliphatic epoxy resins, epoxy resins of polyglycidyl ethers, epoxy resins of polyglycidyl esters, epoxy composite resins obtained by copolymerization with glycidyl methacrylate , and epoxy resins obtained from glycerides of unsaturated fatty acids.
  • Polyglycidyl ether epoxy resins are particularly preferred.
  • epoxy resins of polyglycidyl ethers mention may be made of the condensation reaction products of epichlorohydrin with polyphenols such as bisphenol A or bisphenol F, aliphatic epoxy resins of polyglycidyl ethers, aromatic epoxy resins of polyglycidyl ethers, or a mixture thereof.
  • the powdery solid composition may comprise at least about 25% by weight of the polymeric material, preferably at least about 30% by weight of the polymeric material, and particularly preferably at least about 35% by weight of the polymeric material, based on the weight. total of said powdery solid composition.
  • the powdery solid composition may comprise at most about 60% by weight of the polymeric material, preferably at most 55% by weight. approximately of the polymeric material, and particularly preferably at most 50% by weight approximately of the polymeric material, relative to the total weight of said powdery solid composition.
  • the association of the aluminosilicate with a polymer material as defined in the invention makes it possible to obtain a layer having good fire resistance properties and good mechanical properties, in particular in terms of flexibility, while guaranteeing minimal bulk.
  • the powdery solid composition can comprise one or more metal oxide (s), and preferably several metal oxides.
  • the metal oxide (s) can provide temperature resistance of the fire-resistant layer.
  • the metal oxide (s) can be chosen from copper oxide, iron oxide, manganese oxide, zinc oxide, chromium oxide, titanium oxide, oxide of silicon, and a mixture thereof, and preferably from copper oxide, iron oxide, manganese oxide, and a mixture thereof.
  • the pulverulent solid composition may comprise from 0.1 to 20% by weight of one or more metal oxides, and preferably from 0.5 to 5% by weight of one or more metal oxides, relative to the total weight. of the powdery solid composition.
  • the powdery solid composition comprises a mixture of oxides of manganese and copper, and advantageously a mixture of oxides of iron, manganese and copper.
  • a mixture allows better temperature resistance of the layer, in particular at a temperature greater than or equal to 1000 ° C.
  • the pulverulent solid composition preferably comprises from 0.5 to 5% by weight of said mixture, relative to the total weight of the pulverulent solid composition.
  • the above mixture of oxides may be in the form of a mixed oxide of manganese and copper, and preferably of a mixed oxide of manganese, copper and iron. Such a mixture allows better temperature resistance of the layer, in particular at a temperature greater than or equal to 1000 ° C.
  • the powdery solid composition can advantageously further comprise a mixture of a silicon oxide (eg quartz) and of a zinc oxide, and preferably from 0.1 to 5% by weight of said mixture, relative to the total weight of the pulverulent solid composition.
  • a silicon oxide eg quartz
  • a zinc oxide e.g., zinc oxide
  • the powdery solid composition may further comprise one or more metals, preferably chosen from zinc, nickel, aluminum, and an alloy of at least two of the aforementioned metals.
  • the solid pulverulent composition may comprise from 0.1 to 15% by weight of one or more metals, and preferably from 1 to 10% by weight of one or more metals, relative to the total weight of the solid pulverulent composition.
  • the solid pulverulent composition comprises a mixture of zinc and an alloy of nickel and aluminum, and more particularly preferably from 5 to 15% by weight of said mixture, relative to to the total weight of the powdery solid composition.
  • the powdery solid composition may further comprise one or more compounds comprising magnesium and / or calcium.
  • the powdery solid composition comprises at least silicon, aluminum, oxygen, potassium and carbon.
  • the cable is preferably a telecommunications cable of the LAN cable type (well known under the anglicism “ Local Area Network” and which may be a UTP, SFTP, etc. type cable); an energy or power supply cable; a security cable for fire alarm or emergency lighting systems; or a signaling cable, for example providing remote controls and teletransmissions for underground rail networks ....
  • the elongated electrically conductive element of the cable of the invention may have a melting point of at least about 900 ° C, preferably at least about 950 ° C, particularly preferably at least about 1000 ° C. , and more particularly preferably at least approximately 1050 ° C.
  • the elongated electrically conductive element is made of copper or a copper alloy such as an alloy of copper and nickel.
  • the cable according to the present invention preferably comprises a plurality of elongated electrically conductive elements.
  • each of the elongated electrically conductive elements may be individually surrounded by at least one fire resistant layer as defined above, each of said fire resistant layers being in direct physical contact with each of said elongated electrically conductive elements.
  • the cable comprises at least one twisted pair of elongated electrically conductive elements or at least a fourth of elongated electrically conductive elements (ie four elongated electrically conductive elements rotating in a star around a central axis forming a double pair, or twist of two twisted pairs of elongated electrically conductive elements); each of the elongated electrically conductive elements being individually surrounded by at least one fire resistant layer as defined above, each of said layers being in direct physical contact with each of said elongated electrically conductive elements.
  • the twisting of the individually insulated elongated electrically conductive elements can lead to the existence of multiple mechanical stresses between said elongated electrically conductive elements. individually isolated.
  • the fire resistant layer of the invention is capable of withstanding such mechanical stresses without deterioration.
  • the cable comprises a plurality of twisted pairs of elongated electrically conductive elements or of quads of elongated electrically conductive elements, as defined above.
  • the elongated electrically conductive element (s) can have a cross section ranging from approximately 0.002 to 1 mm 2 , and preferably ranging from approximately 0.01 to 5 mm 2.
  • the cable further comprises at least one polymer layer surrounding said fire-resistant layer.
  • Said polymer layer is preferably an electrically insulating layer.
  • the polymer layer comprises a polymer material chosen from crosslinked and non-crosslinked polymers.
  • the polymeric material can be a homopolymer or a copolymer having thermoplastic and / or elastomeric properties.
  • the polymer material can be chosen from polyolefins, polyurethanes, polyamides, polyesters, polyvinyls, halogenated polymers such as fluoropolymers (eg polytetrafluoroethylene PTFE) or chlorinated polymers (eg polyvinyl chloride PVC), and polyorganosiloxanes .
  • Polyolefins and in particular ethylene polymers and propylene polymers, are preferred.
  • ethylene polymers As examples of ethylene polymers, mention may be made of linear low density polyethylenes (LLDPE), low density polyethylenes (LDPE), medium density polyethylenes (MDPE), high density polyethylenes (HDPE), copolymers of 'ethylene and vinyl acetate (EVA), copolymers of ethylene and butyl acrylate (EBA), methyl acrylate (EMA), 2-hexylethyl acrylate (2HEA), ethylene copolymers and alpha-olefins such as for example polyethylene-octene (PEO), ethylene and propylene copolymers (EPR), ethylene / ethyl acrylate copolymers (EEA), or ethylene propylene terpolymers (EPT) such as, for example, ethylene propylene diene monomer (EPDM) terpolymers.
  • LLDPE linear low density polyethylenes
  • LDPE low density polyethylenes
  • MDPE medium density polyethylenes
  • HDPE high density
  • the expression “low density polyethylene” means a polyethylene having a density ranging from approximately 0.91 to 0.925, said density being measured according to the ISO 1183A standard (at a temperature of 23 ° C.).
  • the expression “medium density polyethylene” means a polyethylene having a density ranging from approximately 0.926 to 0.940, said density being measured according to the ISO 1183A standard (at a temperature of 23 ° C.).
  • high density polyethylene means a polyethylene having a density ranging from approximately 0.941 to 0.965, said density being measured according to the ISO 1183A standard (at a temperature of 23 ° C.).
  • the polymer layer is preferably a layer extruded by techniques well known to those skilled in the art.
  • the cable comprises a plurality of elongated electrically conductive elements, each of the elongate electrically conductive elements being individually surrounded by at least one fire resistant layer as defined above, each of said layers being in direct physical contact with each of said elongated electrically conductive elements , the polymeric layer may surround the plurality of insulated elongate electrically conductive elements.
  • the cable includes a plurality of polymer layers, each of the polymer layers surrounding each of the elongated insulated electrically conductive elements. This embodiment is preferred.
  • the cable according to the present invention may further include a protective sheath.
  • said protective sheath is preferably the outermost layer of said cable.
  • said protective sheath surrounds the polymer layer or layers if they exist, or surrounds the elongated electrically conductive element or elements insulated with the fire-resistant layer or layers.
  • the protective outer sheath is preferably made of a halogen-free material. It can be carried out conventionally from materials retarding the spread of flame or resisting the spread of flame. In particular, if the latter do not contain halogen, we speak of HFFR type sheathing (for the anglicism “ Halogen Free Flame Retardant ”).
  • It comprises at least one polymer material.
  • the polymer material is chosen from crosslinked and noncrosslinked polymers.
  • the polymeric material can be a homo- or a co-polymer having thermoplastic and / or elastomeric properties.
  • the polymeric material of said sheath can be chosen from polyolefins, polyurethanes and polyorganosiloxanes, and preferably from polyolefins.
  • the polymeric material of said sheath is particularly preferably an ethylene polymer, and more particularly preferably a linear low density polyethylene.
  • the protective outer sheath may further include a hydrated flame retardant mineral filler.
  • This hydrated flame-retardant mineral filler acts mainly by physical means by decomposing endothermically (eg release of water), which has the consequence of lowering the temperature of the sheath and limiting the propagation of flames along the cable.
  • endothermically eg release of water
  • the hydrated flame retardant mineral filler can be a metal hydroxide such as magnesium hydroxide or aluminum trihydroxide.
  • the outer protective sheath may further comprise an inert filler, in particular chosen from talc, micas, chalk, dehydrated clays, and one of their mixtures.
  • an inert filler in particular chosen from talc, micas, chalk, dehydrated clays, and one of their mixtures.
  • the powdery solid composition is as defined in the first subject of the invention.
  • the heat treatment is as defined in the first subject of the invention. It makes it possible to obtain the fire-resistant layer from the powdery solid composition.
  • the fire-resistant layer thus obtained can be cooled to room temperature.
  • Step i) is preferably carried out according to electrostatic spraying deposition of the powdery solid composition, for example using a gun (electrostatic paint gun).
  • Step i) is preferably carried out at room temperature.
  • the heat treatment is as defined in the first subject of the invention, and it makes it possible to obtain the fire-resistant layer from the powdery solid composition.
  • the heat treatment is preferably carried out using a tube furnace, a row of heating ceramic heating parts, or any other continuous heating technique (UV, IR, etc.).
  • the third subject of the invention is the use of a powdery solid composition comprising at least one aluminosilicate and as defined in the first subject of the invention, to improve the fire resistance of a power cable, of a safety cable, or a signal cable.
  • the two individually insulated elongated electrically conductive elements were then twisted together to form a pair. Then an HFFR type protective sheath was extruded around the pair of individually insulated elongated electrically conductive elements to form a cable according to the invention.
  • the cable obtained above was introduced in a horizontal position on two metal rings and heated in a flame at 750 ° C for 90 minutes then without flame for 15 minutes under an electrical voltage equal to 250V, in order to test the fire resistance of the layer.
  • test is declared satisfactory if there is no short circuit during the total duration of the test equal to 105 minutes.
  • the fire-resistant layer thus formed meets the requirements of standard IEC 60331-23.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Insulated Conductors (AREA)
EP20208863.9A 2019-11-29 2020-11-20 Kabel mit feuerbeständiger schicht Pending EP3828900A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1913534A FR3103958B1 (fr) 2019-11-29 2019-11-29 câble comprenant une couche résistante au feu

Publications (1)

Publication Number Publication Date
EP3828900A1 true EP3828900A1 (de) 2021-06-02

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Application Number Title Priority Date Filing Date
EP20208863.9A Pending EP3828900A1 (de) 2019-11-29 2020-11-20 Kabel mit feuerbeständiger schicht

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EP (1) EP3828900A1 (de)
FR (1) FR3103958B1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5471014A (en) * 1993-03-24 1995-11-28 Green; Edward A. Insulated electrical conductor containing free-flowing mica
US20050065294A1 (en) * 2003-09-18 2005-03-24 Cramer Michele Le Electrically insulative powder coatings and compositions and methods for making them
US20060175075A1 (en) 2005-02-07 2006-08-10 Robert Konnik Fire resistant cable
WO2017098114A1 (fr) * 2015-12-11 2017-06-15 Nexans Câble résistant au feu
WO2017174941A1 (fr) * 2016-04-07 2017-10-12 Nexans Dispositif comprenant un câble ou un accessoire pour câble contenant une couche composite résistante au feu
EP3640956A1 (de) * 2018-10-18 2020-04-22 Nexans Füllschicht für niederspannungskabel mit verbessertem brandschutz

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5471014A (en) * 1993-03-24 1995-11-28 Green; Edward A. Insulated electrical conductor containing free-flowing mica
US20050065294A1 (en) * 2003-09-18 2005-03-24 Cramer Michele Le Electrically insulative powder coatings and compositions and methods for making them
US20060175075A1 (en) 2005-02-07 2006-08-10 Robert Konnik Fire resistant cable
WO2017098114A1 (fr) * 2015-12-11 2017-06-15 Nexans Câble résistant au feu
WO2017174941A1 (fr) * 2016-04-07 2017-10-12 Nexans Dispositif comprenant un câble ou un accessoire pour câble contenant une couche composite résistante au feu
EP3640956A1 (de) * 2018-10-18 2020-04-22 Nexans Füllschicht für niederspannungskabel mit verbessertem brandschutz

Also Published As

Publication number Publication date
FR3103958A1 (fr) 2021-06-04
FR3103958B1 (fr) 2023-06-30

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