EP0824257B1 - Datenübertragungskabelstruktur - Google Patents

Datenübertragungskabelstruktur Download PDF

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Publication number
EP0824257B1
EP0824257B1 EP19970401868 EP97401868A EP0824257B1 EP 0824257 B1 EP0824257 B1 EP 0824257B1 EP 19970401868 EP19970401868 EP 19970401868 EP 97401868 A EP97401868 A EP 97401868A EP 0824257 B1 EP0824257 B1 EP 0824257B1
Authority
EP
European Patent Office
Prior art keywords
polyolefin
conductors
structure according
sheath
filler
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
EP19970401868
Other languages
English (en)
French (fr)
Other versions
EP0824257A1 (de
Inventor
Marcel Girard
Daniel Prudhon
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
Priority claimed from FR9610115A external-priority patent/FR2752326B1/fr
Priority claimed from FR9612978A external-priority patent/FR2755291B1/fr
Application filed by Nexans SA filed Critical Nexans SA
Publication of EP0824257A1 publication Critical patent/EP0824257A1/de
Application granted granted Critical
Publication of EP0824257B1 publication Critical patent/EP0824257B1/de
Anticipated expiration legal-status Critical
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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
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
    • 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 a cable structure data transmission.
  • the invention has aim to offer a cable for local network computer with good fire resistance and containing no halogenated material, the combustion of which produces harmful gases.
  • Document DE-A-43 32 914 discloses a cable non-flammable electric with conductors individual insulation, in particular polyethylene crosslinked, are surrounded by a polyolefin stuffing thermoplastic loaded with 100 to 250 parts of chalk or kaolin for 100 parts of polyolefin, then of a sheath exterior in PVC blend or in a specific polymer without halogen which becomes cellular under the effect of heat.
  • the invention therefore aims to provide a cable structure resistant to fire, using only common commercial products containing no halogenated material and retaining good transmission performance compatible with high frequencies. It is thus necessary that the insulator of the conductors has both a low relative permittivity: ⁇ r ⁇ 2.3 and practically independent of the frequency, and a very small loss angle at high frequency: tg ⁇ ⁇ 0.004 to 1 Mhz and ⁇ 0.01 to 100 Mhz.
  • the subject of the invention is therefore a cable structure data transmission comprising at least two conductors, each conductor being isolated by a sheath insulating in a non-halogenated material, with low constant dielectric, characterized in that said conductors insulated are located within a polyolefin stuffing flame retardant with an oxygen limit index (ILO) of at least 40, surrounded by an aluminum or aluminum screen / polyester, then an outer sheath of flame-retardant polyolefin having an oxygen limit index (ILO) of at least 35%.
  • ILO oxygen limit index
  • a padding is used polyolefin loaded with kaolin or chalk in a proportion between 60 and 85% by mass.
  • This provision allows both to keep good transmission performance while ensuring good fireproofing and constituting a non-polluting cable, non-toxic and low smoke in case of of fire.
  • the difficulty was that, the materials known usable in cables are, halogenated materials being excluded, the much more combustible polyolefins that PVC and that fireproofing consists of including impurities which degrade the electrical characteristics.
  • the solution found therefore consists in isolating the conductors by an insulating sheath made of a material with low constant dielectric such as uncharged polyethylene, and this although its resistance to fire is poor, in order to maintain good qualities of electrical transmission, and ensuring fire resistance by other layers: stuffing, screen and the outer sheath.
  • the cable includes two copper conductors 1.
  • Each conductor has, for example, 0.62 mm in diameter and insulated with an insulating sheath 2 made of material with low dielectric constant such as polyolefin, for example polyethylene.
  • the insulation called: "foam-skin" consisting of a first layer of expanded polyolefin and a second solid polyolefin layer.
  • the outside diameter of the insulation is for example 1.2 mm.
  • the set of two insulated conductors is embedded in a jam 3 of polyolefin loaded with hydrated compounds having an index oxygen limit (ILO) greater than 40% and a low elongation at break: less than or equal to 50%.
  • ILO index oxygen limit
  • This screen 4 is disposed in aluminum or aluminum / polyester.
  • This screen has a role electrostatic screen against disturbances external. It also has a fire barrier function by reflection of thermal waves.
  • an outer sheath 5 in loaded polyolefin.
  • polyolefin It is for example a mixture of polyethylene, calcium carbonate with or without crosslinker of the "silane” type, these are products commercially available classics, for example under the brands “Megolon S300” or “Megolon S340” of the Lindsay and Williams company. Manufacturers do not give the precise composition but guarantee an ILO.
  • This sheath has an oxygen limit index of 35% minimum and a low thickness: from 0.2 to 0.8 mm.
  • Jam 3 has a function of fire resistance and spacing of the two conductors 1 of the aluminum screen 4.
  • Figure 2 shows another example of the structure of cable according to the invention which does not differ from that of the figure 1 only by the fact that instead of having two insulated conductors 1-2, we have two quarters of insulated conductors: a first quarter of isolated conductors 1-2 and a second quarter of insulated conductors 1A-2A.
  • a quarter consists of a twist of four insulated conductors: 1-2 for the first and 1A-2A for the second.
  • the two quartes are juxtaposed in parallel.
  • the jam 3 surrounds the two quarters in separating them.
  • the jam 3 has in addition, a role of mechanical maintenance of the geometry of each quarter, improving crosstalk in the quarter (between the two pairs of the same quarter); in addition, the stuffing also has a function of spacing the quartes which improves crosstalk between pairs of quartes different.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Insulated Conductors (AREA)
  • Communication Cables (AREA)
  • Inorganic Insulating Materials (AREA)

Claims (7)

  1. Struktur eines Datenübertragungskabels, mit zumindest zwei Leitern, wobei jeder Leiter durch eine isolierende Kabelhülle (2) aus einem nicht halogenen Material mit geringer dielektrischer Konstante isoliert ist, dadurch gekennzeichnet, dass die isolierten Leiter innerhalb eines Beilaufes (3) aus flammhemmenden Polyolefin mit einem Sauerstoffgrenzwert (ILO) von zumindest 40% angeordnet sind, umgeben von einer Abschirmung (4) aus Aluminium oder einem Aluminium/Polyester sowie von einer äußeren Kabelhülle (5) aus flammhemmenden Polyolefin mit einem Sauerstoffgrenzwert (ILO) von zumindest 35%.
  2. Struktur nach Anspruch 1, dadurch gekennzeichnet, dass der Beilauf (3) aus einem Polyolefin besteht, das mit Kaolin oder Kreide in einem Verhältnis zwischen 60 und 85 Massen% gefüllt ist.
  3. Struktur nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die isolierende Kabelhülle (2) ein Polyolefin ist.
  4. Struktur nach Anspruch 3, dadurch gekennzeichnet, dass die isolierende Kabelhülle (2) aus Polyolefin aufgebaut ist, aus einer inneren Schicht aus expandiertem Polyolefin und einer Außenschicht aus massivem Polyolefin.
  5. Struktur nach Anspruch 4, dadurch gekennzeichnet, dass die innere und äußere der Schichten der isolierenden Kabelhülle (2) aus Polyethylen sind.
  6. Struktur nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Beilauf (3) und die äußere Kabelhülle (5) auf Polyethylen basieren.
  7. Struktur nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass sie zwei Viereradern von Leitern (1,1A) umfasst, wobei jede Viererader durch eine Litze von vier Leitern (1,1A) gebildet ist, wobei jeder Leiter isoliert ist und wobei der Beilauf (3) die zwei Viereradern umgibt und sie voneinander trennt.
EP19970401868 1996-08-12 1997-08-04 Datenübertragungskabelstruktur Expired - Lifetime EP0824257B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR9610115A FR2752326B1 (fr) 1996-08-12 1996-08-12 Structure de cable de transmission de donnees
FR9610115 1996-08-12
FR9612978A FR2755291B1 (fr) 1996-10-24 1996-10-24 Structure de cable de transmission de donnees
FR9612978 1996-10-24

Publications (2)

Publication Number Publication Date
EP0824257A1 EP0824257A1 (de) 1998-02-18
EP0824257B1 true EP0824257B1 (de) 2001-10-24

Family

ID=26232915

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970401868 Expired - Lifetime EP0824257B1 (de) 1996-08-12 1997-08-04 Datenübertragungskabelstruktur

Country Status (2)

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EP (1) EP0824257B1 (de)
DE (1) DE69707605T2 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2797087B1 (fr) * 1999-07-26 2003-04-25 Sagem Cable multi-conducteurs et procede de fabrication d'un tel cable
CN105390191B (zh) * 2015-12-22 2017-09-12 上海朗达电缆（集团）有限公司 一种铝合金柔性防火电缆及其制作工艺
CN106205824A (zh) * 2016-06-30 2016-12-07 湖北海德讯信息科技有限公司 耐磨实用型电缆

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2009488A (en) * 1977-12-02 1979-06-13 Bicc Ltd Electric cables
US4412094A (en) * 1980-05-21 1983-10-25 Western Electric Company, Inc. Compositely insulated conductor riser cable
DE3228119A1 (de) * 1982-07-28 1984-02-02 AEG-Telefunken Kabelwerke AG, Rheydt, 4050 Mönchengladbach Halogenfreies, flammwidriges kabel mit funktionserhalt im brandfall fuer eine bestimmte zeit
DE3633056A1 (de) * 1986-09-29 1988-04-07 Kabelmetal Electro Gmbh Extrudierfaehige mischung fuer halogenfreie, schwer entflammbare umhuellungen
DE3739879A1 (de) * 1987-11-25 1989-06-08 Kabelmetal Electro Gmbh Verfahren zur herstellung einer uebertragungsleitung fuer optische signale
GB8806497D0 (en) * 1988-03-18 1988-04-20 Mortile Acoustic Ind Ltd Non-toxic fire retardant thermoplastic material
DE4332914A1 (de) * 1993-09-23 1995-03-30 Siemens Ag Flammwidriges elektrisches Kabel

Also Published As

Publication number Publication date
EP0824257A1 (de) 1998-02-18
DE69707605D1 (de) 2001-11-29
DE69707605T2 (de) 2002-08-01

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