EP0824257A1 - Structure de câble de transmission de données - Google Patents
Structure de câble de transmission de données Download PDFInfo
- Publication number
- EP0824257A1 EP0824257A1 EP97401868A EP97401868A EP0824257A1 EP 0824257 A1 EP0824257 A1 EP 0824257A1 EP 97401868 A EP97401868 A EP 97401868A EP 97401868 A EP97401868 A EP 97401868A EP 0824257 A1 EP0824257 A1 EP 0824257A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polyolefin
- conductors
- sheath
- structure according
- stuffing
- 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
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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 at 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 that 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.
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Insulated Conductors (AREA)
- Communication Cables (AREA)
- Inorganic Insulating Materials (AREA)
Abstract
Description
Claims (7)
- Structure de câble de transmission de données comprenant au moins deux conducteurs, chaque conducteur étant isolé par une gaine isolante (2) en un matériau non halogéné à faible constante diélectrique, caractérisée en ce que lesdits conducteurs isolés sont situés au sein d'un bourrage (3) de polyoléfine ignifugée ayant un indice limite d'oxygène (ILO) d'au moins 40 %, entouré d'un écran (4) en aluminium ou en aluminium/polyester puis d'une gaine externe (5) en polyoléfine ignifugée ayant un indice limite d'oxygène (ILO) d'au moins 35 %.
- Structure selon la revendication 1, caractérisée en ce que le bourrage (3) est en polyoléfine chargée de kaolin ou de craie dans une proportion comprise entre 60 et 85 % en masse.
- Structure selon l'une des revendications 1 ou 2, caractérisée en ce que ladite gaine isolante (2) est en polyoléfine.
- Structure selon la revendication 3, caractérisée en ce que ladite gaine isolante (2) en polyoléfine se divise en une couche interne en polyoléfine expansée et en une couche externe en polyoléfine massive.
- Structure selon la revendication 4, caractérisée en ce que lesdites couches interne et externe de ladite gaine isolante (2) sont en polyéthylène.
- Structure selon l'une des revendications 1 à 5, caractérisée en ce que ledit bourrage (3) et ladite gaine externe (5) sont à base de polyéthylène.
- Structure selon l'une des revendications 1 à 6, caractérisée en ce qu'elle comprend deux quartes de conducteurs (1,1A), chaque quarte étant constituée par une torsade de quatre conducteurs (1,1A), chaque conducteur étant isolé, ledit bourrage (3) entourant les deux quartes et les séparant.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9610115 | 1996-08-12 | ||
FR9610115A FR2752326B1 (fr) | 1996-08-12 | 1996-08-12 | Structure de cable de transmission de donnees |
FR9612978 | 1996-10-24 | ||
FR9612978A FR2755291B1 (fr) | 1996-10-24 | 1996-10-24 | Structure de cable de transmission de donnees |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0824257A1 true EP0824257A1 (fr) | 1998-02-18 |
EP0824257B1 EP0824257B1 (fr) | 2001-10-24 |
Family
ID=26232915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19970401868 Expired - Lifetime EP0824257B1 (fr) | 1996-08-12 | 1997-08-04 | Structure de câble de transmission de données |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0824257B1 (fr) |
DE (1) | DE69707605T2 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1073066A1 (fr) * | 1999-07-26 | 2001-01-31 | Sagem Sa | Cable multi-conducteurs et procédé de fabrication d'un tel cable |
CN105390191A (zh) * | 2015-12-22 | 2016-03-09 | 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 |
Citations (7)
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 |
EP0324054A2 (fr) * | 1987-11-25 | 1989-07-19 | kabelmetal electro GmbH | Procédé de fabrication d'un câble optique |
EP0333514A1 (fr) * | 1988-03-18 | 1989-09-20 | Mortile Industries Ltd | Matériel thermoplastique retardateur de feu de basse toxicité |
DE4332914A1 (de) * | 1993-09-23 | 1995-03-30 | Siemens Ag | Flammwidriges elektrisches Kabel |
-
1997
- 1997-08-04 EP EP19970401868 patent/EP0824257B1/fr not_active Expired - Lifetime
- 1997-08-04 DE DE1997607605 patent/DE69707605T2/de not_active Expired - Fee Related
Patent Citations (7)
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 |
EP0324054A2 (fr) * | 1987-11-25 | 1989-07-19 | kabelmetal electro GmbH | Procédé de fabrication d'un câble optique |
EP0333514A1 (fr) * | 1988-03-18 | 1989-09-20 | Mortile Industries Ltd | Matériel thermoplastique retardateur de feu de basse toxicité |
DE4332914A1 (de) * | 1993-09-23 | 1995-03-30 | Siemens Ag | Flammwidriges elektrisches Kabel |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1073066A1 (fr) * | 1999-07-26 | 2001-01-31 | Sagem Sa | Cable multi-conducteurs et procédé de fabrication d'un tel cable |
FR2797087A1 (fr) * | 1999-07-26 | 2001-02-02 | Sagem | Cable multi-conducteurs et procede de fabrication d'un tel cable |
CN105390191A (zh) * | 2015-12-22 | 2016-03-09 | 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 |
Also Published As
Publication number | Publication date |
---|---|
DE69707605T2 (de) | 2002-08-01 |
EP0824257B1 (fr) | 2001-10-24 |
DE69707605D1 (de) | 2001-11-29 |
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