EP1033725A1 - Composition isolante céramisable ignifuge pour câbles - Google Patents

Composition isolante céramisable ignifuge pour câbles Download PDF

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Publication number
EP1033725A1
EP1033725A1 EP00810137A EP00810137A EP1033725A1 EP 1033725 A1 EP1033725 A1 EP 1033725A1 EP 00810137 A EP00810137 A EP 00810137A EP 00810137 A EP00810137 A EP 00810137A EP 1033725 A1 EP1033725 A1 EP 1033725A1
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EP
European Patent Office
Prior art keywords
composition according
ethylene
polymers
polymer blend
flame
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.)
Withdrawn
Application number
EP00810137A
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German (de)
English (en)
Inventor
Ulrich Dr. Heese
Roman Schmidt
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.)
Huber and Suhner AG
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Huber and Suhner AG
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 Huber and Suhner AG filed Critical Huber and Suhner AG
Publication of EP1033725A1 publication Critical patent/EP1033725A1/fr
Withdrawn legal-status Critical Current

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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
    • H01B7/17—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 the field of flame retardant insulation materials. It relates to a ceramicizable flame-retardant composition, containing a polymer blend and a ceramic filler system, such as for processing to wire insulation or cable sheaths fire-proof Cable can be used.
  • Flame retardant insulation materials such as those e.g. for insulation and sheathing of fireproof cables are used, on the one hand should be poorly flammable and if possible not to carry a fire, and on the other hand they should burned out state will still be able to provide individual electrical insulation Ensure conductors from each other.
  • the invention is therefore based on the object of a ceramizable, flame-retardant To provide composition, which is halogen-free and which as free-flowing granules in easily processable, i.e. for example on common Plastic extruders are available in extrudable form.
  • compositions of the type mentioned solved that the polymer blend at least partially from ethylenic polymers and organosilicon polymers.
  • This composition allows a highly concentrated admixture of ceramic fillers and leads to a free-flowing granulate, which can be found in practically all plastics processing machines can be processed.
  • the composition is like this after extrusion stable that extrusion and crosslinking can be separated, which is the prerequisite for post-processing like creating a radiation network. Because radiation networking is possible in the electron beam, for example, can also on the Addition of reactive compounds such as peroxides can be dispensed with, and it a high processing temperature can also be selected. High processing temperatures allow setting a low viscosity and allow the application of particularly thin layers.
  • the ethylenic polymers are polyethylene (PE), particularly preferably very low density polyethylene (ULDPE), or copolymers of ethylene, such as preferably ethylene-vinyl acetate copolymers (EVA), ethylene Ethyl acrylate copolymers (EEA) or ethylene-butyl acrylate copolymers (EBA), or a mixture of the polymers mentioned is used.
  • PE polyethylene
  • ULDPE very low density polyethylene
  • EVA ethylene-vinyl acetate copolymers
  • ESA ethylene Ethyl acrylate copolymers
  • EBA ethylene-butyl acrylate copolymers
  • organosilicon polymers are preferably selected so that they contain little or no phenyl groups, the electron crosslinkability increases both within the copolymer and the organosilicon polymer and between the components.
  • an oxide preferably silicon oxide (SiO 2 )
  • SiO 2 silicon oxide
  • the ceramicizable filler also preferably contains borates, for example zinc borates, the spread of the flames and the formation of smoke can be prevented even better.
  • the invention also relates to the use of a composition of the type described above for the production of flame-retardant insulating materials, especially in fire safety cables, as well as electrical wires or electrical Cable containing at least one component based on a composition of the type described above.
  • the use has proven to be particularly effective a composition of the type described above as the head immediately enclosing layer.
  • the flame-retardant insulation materials according to the invention are intended to be related be described with the use as cable or wire jackets.
  • the use of flame-retardant jackets in electrical conductors is in required by law in many countries for certain installations.
  • the flame retardant Casings should burn as badly as possible on one side, and on the other hand, if they still burn, they should for one maintain the functionality of the electrical conductor for as long as possible, so that in the event of a fire there is a lot of time to save people and materials.
  • the proposed composition essentially has the advantages that the insulation material is poorly flammable, that little burns off Smoke develops and that stable ashes are formed during combustion, which enable the function of the coated electrical conductor to be maintained.
  • the stable ashes formed during the combustion form a ceramic sheath around the conductor, which has an insulating effect, and short circuits etc. can prevent.
  • a polymer blend from an ethylenic polymer and an organosilicon polymer with a filler system and optionally mixed with other auxiliaries.
  • ethylenic polymer e.g. Polyethylene extremely low density (ULDPE), as well as a Abundance of ethylene copolymers such as ethylene-ethyl acrylate copolymer (EEA), ethylene-butyl acrylate copolymer (EBA), and especially ethylene-vinyl acetate copolymer (EVA) as they are all available as standard.
  • EVA ethylene-ethyl acrylate copolymer
  • EBA ethylene-butyl acrylate copolymer
  • EVA ethylene-vinyl acetate copolymer
  • Important when choosing the ethylenic Polymers is that it can be cross-linked with electron beam, and that it is easy to fill, i.e. that it is able to absorb a high proportion of fillers.
  • organosilicon polymers can also be used as the organosilicon polymer Find. Silicones with a low proportion of phenyl groups have proven successful or in particular those without any phenyl groups, since these are particularly good at Electron beam can be networked. For example, so-called MVQ silicones (methyl vinyl quality). Also with organosilicon polymers it is important that they are miscible with the other components and that they can be cross-linked as well as possible in the electron beam, even with the admixed one ethylenic polymer. The good cross-linkability between ethylenic Polymer and the organosilicon polymer is for good mechanical The bond between the two components is important.
  • a mixture of silicon oxide (SiO 2 ) and zinc borate has proven itself as a filler. These two substances lead to good ceramization, ie to the formation of stable, non-conductive ashes, and in particular the zinc borate can also effectively suppress the spread of flames and the development of smoke.
  • the zinc borate is added as a powder, and the silicon oxide has very particularly thermally pretreated powder (fired at 1500 ° C), which is then finely ground (grain sizes in the range of 0.1-50 micrometers, particularly suitable in the range of 1-15 micrometers) , proven.
  • the material Farsil® from Silmer, 80410 Cayeux sur mer, France can be used.
  • the above-mentioned components can also contain auxiliary substances such as substances to delay aging, plasticizers, lubricants or additional flame retardants can be added.
  • Granules are obtained by mixing 30-40 parts by weight of polymer blend and 60-70 parts by weight Fillers (advantageously silicon oxide and zinc borate in the ratio 9-11 to 1.9-2.3), and optionally 20-30 parts by weight of additives at temperatures of up to 150 ° C in a common compounding plant.
  • the so obtained Granules have a number of advantages over the prior art on. So it can, since there are no intrinsic reactive components like peroxides or contains similar, can be extruded at comparatively high temperatures. This enables due to the associated low viscosity of the melt Production of particularly thin layers less than 0.1 mm thick. Furthermore After extrusion, the material is already in the uncrosslinked state of high dimensional stability.
  • This dimensional stability makes it possible for such a coated cable does not have to be networked immediately, but via pulleys can be performed.
  • Such a cable can be used after extrusion of the coating through the many deflection rollers of a radiation crosslinking system.
  • the proposed composition can be used to build up any layer of a wire or a cable, but it turns out that the layer directly adjacent to the conductor advantageously consists of the flame-retardant composition.
  • Figure 1 shows a schematic representation of an electrical wire, which is provided with a flame-retardant insulation layer 11.
  • the central electrical conductor 10 is here directly surrounded by the flame-retardant layer 11, which ensures innermost protection.
  • the layer 11 is surrounded by a secondary insulation 12.
  • This can be made from a conventional insulation material, because thanks to the suitable composition of the proposed flame-retardant layer 11, a firm mechanical bond between the layers 11 and 12 is possible without special surface treatment of the layer 11.
  • the secondary insulation 12 can be surrounded by further insulation layers, a shielding layer and a sheath, as here by an outer insulation 13, which closes off the cable from the outside. If you apply flame-retardant layers 11 with a thickness of 0.1 mm (e.g. miniature special cables) to 1 mm (e.g. energy cables), stable ashes are formed in the event of a fire, which can function for more than 3 hours at temperatures of 950 ° C (electrical Line and insulation) of the conductors. In this way, further outlying layers such as layers 12 and 13 in FIG.
  • separating layers, sheaths, shielding layers, common wire coverings, other insulations and / or inlays can be produced from other materials, which have, for example, better mechanical properties without the protective effect the flame retardant layer is significantly impaired.
  • Another advantage of the coating material according to the invention results from the fact that no high-density components, such as Al 2 O 3 , are used. Since many legal requirements specify the thickness of flame-retardant layers, and the raw material is usually awarded at a price per kilo, this results in an overall more cost-effective insulation coating.
EP00810137A 1999-03-01 2000-02-18 Composition isolante céramisable ignifuge pour câbles Withdrawn EP1033725A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19908818 1999-03-01
DE1999108818 DE19908818A1 (de) 1999-03-01 1999-03-01 Keramisierende flammwidrige Isolationsmischung für Kabel

Publications (1)

Publication Number Publication Date
EP1033725A1 true EP1033725A1 (fr) 2000-09-06

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EP00810137A Withdrawn EP1033725A1 (fr) 1999-03-01 2000-02-18 Composition isolante céramisable ignifuge pour câbles

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EP (1) EP1033725A1 (fr)
DE (1) DE19908818A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1347464A1 (fr) 2002-03-22 2003-09-24 Nexans Composition isolante pour cable électrique de sécurité
WO2010142917A1 (fr) * 2009-06-11 2010-12-16 Nexans Câble électrique apte à assurer la continuité de distribution électrique en cas d'incendie
EP2545562A2 (fr) * 2010-03-12 2013-01-16 General Cable Technologies Corporation Isolant comportant des particules de micro-oxyde et câble l'utilisant
CN104240796A (zh) * 2014-09-10 2014-12-24 江苏远方电缆厂有限公司 一种陶瓷绝缘体以及制备包含该陶瓷绝缘体电缆的方法
WO2016038427A1 (fr) * 2014-09-12 2016-03-17 Prysmian S.P.A. Câble ignifuge pourvu de couche céramifiable
CN110093039A (zh) * 2019-04-17 2019-08-06 东莞市利群榕兴高分子科技有限公司 一种导电防火并能陶瓷化的硅橡胶组合物及其制造方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU200580U1 (ru) * 2020-06-17 2020-10-29 Общество с ограниченной ответственностью "Камский кабель" Кабель силовой огнестойкий с резиновой изоляцией и оболочками из огнестойких безгалогенных композиций

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19717645A1 (de) * 1997-04-25 1998-10-29 Daetwyler Ag Flammwidrige Zusammensetzung zur Herstellung von elektrischen Kabeln mit Isolations- und/oder Funktionserhalt

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19717645A1 (de) * 1997-04-25 1998-10-29 Daetwyler Ag Flammwidrige Zusammensetzung zur Herstellung von elektrischen Kabeln mit Isolations- und/oder Funktionserhalt

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1347464A1 (fr) 2002-03-22 2003-09-24 Nexans Composition isolante pour cable électrique de sécurité
WO2010142917A1 (fr) * 2009-06-11 2010-12-16 Nexans Câble électrique apte à assurer la continuité de distribution électrique en cas d'incendie
FR2946789A1 (fr) * 2009-06-11 2010-12-17 Nexans Cable electrique apte a assurer la continuite de distribution electrique en cas d'incendie.
KR20120027053A (ko) * 2009-06-11 2012-03-20 넥쌍 화재시에 전력 분배의 연속성을 보장하기에 적합한 전기 케이블
EP2545562A2 (fr) * 2010-03-12 2013-01-16 General Cable Technologies Corporation Isolant comportant des particules de micro-oxyde et câble l'utilisant
EP2618338A3 (fr) * 2010-03-12 2013-10-23 General Cable Technologies Corporation Isolation avec des micro-particules d'oxyde destinée à des composants de câble
EP2545562A4 (fr) * 2010-03-12 2013-10-23 Gen Cable Technologies Corp Isolant comportant des particules de micro-oxyde et câble l'utilisant
EP2618339A3 (fr) * 2010-03-12 2013-10-30 General Cable Technologies Corporation Câble doté d'une isolation avec des particules d'oxyde
EP2618337A3 (fr) * 2010-03-12 2013-10-30 General Cable Technologies Corporation Isolation de conducteur avec micro-particules d'oxyde
CN104240796A (zh) * 2014-09-10 2014-12-24 江苏远方电缆厂有限公司 一种陶瓷绝缘体以及制备包含该陶瓷绝缘体电缆的方法
WO2016038427A1 (fr) * 2014-09-12 2016-03-17 Prysmian S.P.A. Câble ignifuge pourvu de couche céramifiable
CN106688052A (zh) * 2014-09-12 2017-05-17 普睿司曼股份公司 具有可瓷化层的耐火电缆
CN106688052B (zh) * 2014-09-12 2018-07-17 普睿司曼股份公司 具有可瓷化层的耐火电缆
US10068684B2 (en) 2014-09-12 2018-09-04 Prysmian S.P.A. Fire resistant cable with ceramifiable layer
CN110093039A (zh) * 2019-04-17 2019-08-06 东莞市利群榕兴高分子科技有限公司 一种导电防火并能陶瓷化的硅橡胶组合物及其制造方法

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Publication number Publication date
DE19908818A1 (de) 2000-09-07

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