EP0362929A1 - Câble de communication résistant au feu - Google Patents

Câble de communication résistant au feu Download PDF

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Publication number
EP0362929A1
EP0362929A1 EP89202422A EP89202422A EP0362929A1 EP 0362929 A1 EP0362929 A1 EP 0362929A1 EP 89202422 A EP89202422 A EP 89202422A EP 89202422 A EP89202422 A EP 89202422A EP 0362929 A1 EP0362929 A1 EP 0362929A1
Authority
EP
European Patent Office
Prior art keywords
layer
cable according
cable
metallic build
frnc
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Withdrawn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
EP89202422A
Other languages
German (de)
English (en)
Inventor
Hans Leo Ditscheid
Walter Burger
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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 Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0362929A1 publication Critical patent/EP0362929A1/fr
Withdrawn legal-status Critical Current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
    • H01B7/292—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 invention relates to a flame-resistant cable with a jacket made of fire-retardant material, which contains a closed metallic construction layer.
  • flame resistance is intended to summarize various requirements that must be at least partially met by a cable in the event of a fire.
  • the cable should be halogen-free, must not spread a fire, must maintain its function for a certain time even at very high temperatures (service life) and should generate little smoke.
  • FRNC materials F lame R estistant N on orrosive C
  • DE-OS 36 31 699 describes a cable having at least one conductor, under the shielding of which a band of glass fabric with a metal layer applied on one side is applied.
  • a band should act like a closed metallic pipe against flames and have sufficiently large gaps, which enables the escape of gases generated in the event of a fire.
  • the invention has for its object to increase the flame resistance of the cable of the type mentioned with simple means.
  • the solution is achieved in that the metallic build-up layer surrounds an inner jacket which contains a paper wrap layer.
  • the inexpensive paper tapes carbonize inside an outer jacket which prevents the entry of oxygen and is closed with a metallic layer, in particular within a metal tube. They keep their shape and ensure the insulation of the wires against the metal pipe.
  • a paper wrapping layer of the inner jacket also offers a protective function against the pressing or welding heat when the metal pipe is applied.
  • the metal tube is preferably corrugated.
  • a corrugated pipe offers additional cavity inside the cable, which makes heat conduction difficult.
  • the corrugated pipe is only in contact with a small part of the circumferential surface of the inner jacket.
  • the components of a FRNC outer jacket layer located in the outer corrugation troughs of the corrugated tube offer a permanent high heat transfer resistance even after the corrugation.
  • a laminate layer made of a stretchable multilayer film containing plastic and aluminum is also suitable as the closed metallic layer.
  • Such a film is stretchable on the one hand and therefore does not hinder the expansion that occurs when the underlying FRNC layer is curled.
  • the aluminum layer reflects and conducts heat. Since the laminate layer is stretchable, it does not need, as in known case, have gaps through which gases should escape in the event of fire.
  • the laminate layer designed according to the invention remains closed and therefore reliably prevents oxygen from penetrating into the cable core.
  • an FRNC layer is arranged between the metallic build-up layer and the paper wrap layer.
  • the inner jacket has two layers of paper, between which an FRNC layer is arranged.
  • the FRNC layer of the inner jacket forms a heat-insulating protective layer during the fire. Water-releasing fillers cause cooling. The temperature of the FRNC layer is warped.
  • a cable constructed according to the invention maintains its insulation resistance for a long time, at least for 25 minutes. It remains dimensionally stable to a certain extent, so that the core insulation is protected even in the event of a fire.
  • a closed metal tube offers better mechanical protection than a stretchy laminate layer.
  • the service life (service life) is also increased by a metal tube.
  • a further increase in service life can be achieved with an outer jacket surrounding the metallic build-up layer.
  • Such an outer jacket should contain at least one layer of FRNC material.
  • the outer FRNC layer is a mechanically resistant outer layer, which does not continue the fire in the event of a fire.
  • electrical conductors known per se has proven to be particularly advantageous, which are characterized in that electrical conductors running within the sheath directly from a thin layer of a high-temperature-resistant polymer, in particular of a polyesterimide, polyamideimide or are surrounded by polyimide, and that a much thicker layer of a less temperature-resistant material with a softening temperature of more than 140 ° is applied thereon.
  • a high-temperature-resistant polymer in particular of a polyesterimide, polyamideimide or are surrounded by polyimide, and that a much thicker layer of a less temperature-resistant material with a softening temperature of more than 140 ° is applied thereon.
  • a high-temperature-resistant polymer in particular of a polyesterimide, polyamideimide or are surrounded by polyimide, and that a much thicker layer of a less temperature-resistant material with a softening temperature of more than 140 ° is applied thereon.
  • substances are suitable which either do not melt (such as poly
  • thicker and less temperature-resistant layer cheaper materials can be used, such as, in particular, cross-linked polyolefins. If thermoplastics with a softening temperature lower than 140 ° are used, sufficient flame resistance can be achieved by adding fillers such as aluminum hydroxide. Suitable is e.g. also polyphenylene oxide.
  • the copper conductor 2 of the core 1 drawn in cross section in FIG. 1 has a diameter of 0.8 mm. It is provided with a 0.05 mm thick insulation 3 made of polyester imide. A layer 4 of cross-linked polyolefin with a wall thickness of 0.5 mm is extruded thereon. Several of these wires are placed in a communication cable within different FRNC jackets. In the event of a fire, depending on the sheath structure, the insulation was maintained for 10 to 60 minutes. The thicker layer 4 of the cores that warped and their varnish layer was retained during this time. The non-combustible residues ensured the insulation and the wire spacing.
  • a particularly good flame resistance was achieved with a jacket structure according to FIG. 2, which surrounds two wires 1 and 1a according to FIG. 1.
  • An inner jacket consists of the paper winding 5 (approx. 0.75 mm thick) as a cable core winding, an extruded FRNC layer 6 (approx. 1 mm thick) from a multi-component system with, inter alia, approx. 60% aluminum hydroxide filling and a subsequently applied paper winding 7 (approx. 0 , 75 mm thick). Because of the 0.3 mm thick sheet with a longitudinal seam welded steel shaft jacket 8 prevents the entry of oxygen to the paper windings 5 and 7 in the event of a fire, the paper can only carbonize without falling apart.
  • the insulation of the wires 1 and 1a with respect to the corrugated steel tube 8 is ensured.
  • the flexible corrugated steel tube 8 dissipates heat on the one hand and on the other hand offers mechanical protection of the wires 1 and 1 a against forces acting radially on the cable, which can be caused by parts falling on the cable.
  • a multilayer outer jacket is produced with the extruded FRNC layers 9 and 10 and with an intermediate bandage 11.
  • the 1 to 2 mm thick FRNC layers 9 and 10 consist of a multi-component system with about 60% aluminum hydroxide filling.
  • the intermediate bandage 11 was produced from an aluminum double composite film, in which a 20 ⁇ m thick plastic layer (PETP) was arranged between 15 ⁇ m thick aluminum layers.
  • PETP plastic layer
  • the FRNC layer 9 is held by a heat-dissipating and reflecting intermediate bandage 11 in the event of a fire on the corrugated steel tube 8, so that the heat-insulating and cooling effect of at least the FRNC layer 9 is maintained for a long time in the event of a fire.

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  • Insulated Conductors (AREA)
EP89202422A 1988-10-03 1989-09-27 Câble de communication résistant au feu Withdrawn EP0362929A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883833597 DE3833597A1 (de) 1988-10-03 1988-10-03 Flammfestes nachrichtenkabel
DE3833597 1988-10-03

Publications (1)

Publication Number Publication Date
EP0362929A1 true EP0362929A1 (fr) 1990-04-11

Family

ID=6364283

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89202422A Withdrawn EP0362929A1 (fr) 1988-10-03 1989-09-27 Câble de communication résistant au feu

Country Status (2)

Country Link
EP (1) EP0362929A1 (fr)
DE (1) DE3833597A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6828022B2 (en) 2000-02-21 2004-12-07 Cables Pirelli Fire-resistant and water-resistant halogen-free low-voltage cables
EP2346130A3 (fr) * 2009-10-27 2013-07-31 Kabelovna Kabex a.s. Tuyau résistant au feu pour câbles
EP3367393A1 (fr) * 2017-02-24 2018-08-29 Hitachi Metals, Ltd. Câble lan
EP3410444A1 (fr) * 2017-05-29 2018-12-05 Maria Iciar Zublezu Llona Gaine protectrice pour câbles
US10937569B2 (en) 2018-03-28 2021-03-02 General Cable Technologies Corporation Fire resistant data communication cable
US11465002B2 (en) 2014-09-10 2022-10-11 Dymat Construction Products, Inc. Systems and methods for fireproofing cables and other structural members

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19503672A1 (de) * 1995-01-25 1996-08-01 Siemens Ag Mehradriges, kunststoffisoliertes Niederspannungs-Starkstromkabel
GB9707300D0 (en) 1997-04-10 1997-05-28 Plastic Insulated Cables Ltd Communications cable
DE19737309A1 (de) * 1997-08-27 1999-03-04 Alsthom Cge Alcatel Halogenfreie flammwidrige Polymermischung
DE19959575A1 (de) * 1999-12-10 2001-07-05 Nkt Cables Gmbh Verkabelungselement
DE10203900A1 (de) * 2002-01-31 2003-08-14 Nexans Elektrische Leitung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4154976A (en) * 1977-10-25 1979-05-15 General Cable Corporation Flame retardant inside wiring cable made with an annealed metal sheath
GB2043326A (en) * 1979-02-26 1980-10-01 Kabel Metallwerke Ghh Fire resistant cable
DE8716167U1 (fr) * 1987-12-08 1988-01-21 Kabelmetal Electro Gmbh, 3000 Hannover, De
DE8716166U1 (fr) * 1987-12-08 1988-01-21 Kabelmetal Electro Gmbh, 3000 Hannover, De

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4154976A (en) * 1977-10-25 1979-05-15 General Cable Corporation Flame retardant inside wiring cable made with an annealed metal sheath
GB2043326A (en) * 1979-02-26 1980-10-01 Kabel Metallwerke Ghh Fire resistant cable
DE8716167U1 (fr) * 1987-12-08 1988-01-21 Kabelmetal Electro Gmbh, 3000 Hannover, De
DE8716166U1 (fr) * 1987-12-08 1988-01-21 Kabelmetal Electro Gmbh, 3000 Hannover, De

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6828022B2 (en) 2000-02-21 2004-12-07 Cables Pirelli Fire-resistant and water-resistant halogen-free low-voltage cables
EP2346130A3 (fr) * 2009-10-27 2013-07-31 Kabelovna Kabex a.s. Tuyau résistant au feu pour câbles
US11465002B2 (en) 2014-09-10 2022-10-11 Dymat Construction Products, Inc. Systems and methods for fireproofing cables and other structural members
EP3367393A1 (fr) * 2017-02-24 2018-08-29 Hitachi Metals, Ltd. Câble lan
US10748676B2 (en) 2017-02-24 2020-08-18 Hitachi Metals, Ltd. LAN cable
EP3410444A1 (fr) * 2017-05-29 2018-12-05 Maria Iciar Zublezu Llona Gaine protectrice pour câbles
US10937569B2 (en) 2018-03-28 2021-03-02 General Cable Technologies Corporation Fire resistant data communication cable

Also Published As

Publication number Publication date
DE3833597A1 (de) 1990-04-05

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