EP0268827B1 - Flame-resistant electrical cable - Google Patents
Flame-resistant electrical cable Download PDFInfo
- Publication number
- EP0268827B1 EP0268827B1 EP19870115420 EP87115420A EP0268827B1 EP 0268827 B1 EP0268827 B1 EP 0268827B1 EP 19870115420 EP19870115420 EP 19870115420 EP 87115420 A EP87115420 A EP 87115420A EP 0268827 B1 EP0268827 B1 EP 0268827B1
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- EP
- European Patent Office
- Prior art keywords
- tape
- conductor
- flame
- 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.)
- Expired - Lifetime
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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
Definitions
- the present invention relates to a fireproof electrical cable comprising at least one conductor, an insulating layer close to the conductor in polyolefin or polyamide free of halogen and sulfur charged with a mineral material to raise its limit oxygen index, and an outer layer ribboned.
- the object of the invention is also to obtain a cable that is very good at fire, flame retardant by using a little or not flame retardant insulator and an external tape not necessarily covering the entire surface of the sheath or insulator, the tape ensuring most of the fire resistance.
- the invention applies in particular to cables for controls and measurements.
- Document FR-A- 2 377 688 relates in particular to a cable comprising an insulation of polyolefin conductors charged with kaolin, a second insulation after twisting of the insulated conductors in polyolefin loaded with hydrated alumina, two copper bands with contiguous ribbon edges , two polyamide tape, then an internal silicone rubber sheath.
- the object of the present invention is to provide flame retardant electrical cables satisfying the flame non-propagation test of standard IEC 332-1, while using flame retardant polymers charged with mineral material but free of halogen and sulfur and having satisfactory mechanical properties.
- the invention therefore avoids having to use polymers having very high filler rates to be highly flame retardant, which also leads to poor mechanical characteristics; on the contrary, it makes it possible to use polymers with an average charge rate compatible with correct mechanical characteristics.
- the external tape although it does not completely cover the surface to be covered, is sufficient to reach the level of fireproofing required by standard IEC 332-1, while the cable made with the flame retardant polymer without this protective tape would be non-compliant .
- the cable according to the invention is characterized in that its banded external layer is covered on its internal face with an acrylic adhesive, flame retardant or not.
- the mineral material used used as flame retardant filler of the halogen and sulfur-free polymer can be alumina trihydrate, magnesia hydrate, chalk, silicate, borate ...
- the tape layer can also be metallic, in which case it is copper or aluminum with a flame-retardant adhesive or not on one of the faces which will be the inner face.
- FIG. 1 represents a cable of circular cross-section less than 2 mm2 with an insulating layer of flame-retardant polymer free of halogen and sulfur and with a flame-retardant ribbon-like layer with low overlap.
- FIG. 2 represents a cable of circular cross section with a straight cross section greater than 2 mm2 similar in all points to the cable of FIG. 1, except that the ribbon flame retardant layer is wound up with a gap.
- FIG. 3 represents a flat cable formed of elementary cables in a pair and a ground wire, glued to each other and having ribbons deposited in rings, separated from each other and equidistant.
- the cable comprises a central conductor 1 formed of 7 stranded wires with a diameter of 0.15 mm, surrounded by an electrical insulator 2 made of flame-retardant polyethylene marketed under the designation UNIFOS 1386 by UNIFOS or of polyamide marketed under the designation MEGOLON I by LONDSAY and WILLIAMS, thickness 0.50 mm.
- an electrical insulator 2 made of flame-retardant polyethylene marketed under the designation UNIFOS 1386 by UNIFOS or of polyamide marketed under the designation MEGOLON I by LONDSAY and WILLIAMS, thickness 0.50 mm.
- a ribbon cable was also made up of 20 pairs of shielded conductors sheathed and glued against each other.
- Figure 3 shows five of these pairs.
- the conductors 1 of a pair are strands of 7 tinned copper wires with a diameter of 0.12 mm. Each conductor of the pair is insulated by a layer 2 of polyethylene 0.30 mm thick.
- each pair is twisted with a pitch of 38 mm.
- Each pair is covered with a polyester tape 8 mm wide, helically wrapped around it with a recovery rate of 50%, not shown.
- Ground wire 8 has as conductor a strand of 7 tinned copper wires of 0.12 mm in diameter.
- the ribbon pair and the ground wire are surrounded by an aluminum tape laminated with a polyester thermo adhesive, 8 mm wide, helically wound with a 50% overlap, also not shown.
- the striped assembly is sheathed by a 0.25 mm thick layer 9 of polyethylene loaded with hydrated alumina until a limit oxygen index of 40 is obtained, sold under the designation "UNIFOS 5040".
- the final diameter of the sheathed pair is 2.80 mm.
- Bonding of the sheathed pairs is done by a hot treatment.
- a taping is carried out using transverse adhesive strips 10 equidistant, separated by wide intervals, for example strips of 15 mm width spaced 5 cm, or even strips of 30 mm width spaced 35 cm. It has in fact been observed that, surprisingly, the protective tapes do not need to continuously cover the insulated conductors to ensure effective protection against the propagation of the flame. It suffices that the tapes are made of a non-combustible material, with the same combustible contact adhesive applied to its internal face.
- the adhesive tape may be made of polyimide, in particular that sold under the brand KAPTON by DUPONT de NEMOURS, provided with an acrylic adhesive on one side.
- This tape will for example have a width of 15 mm and a thickness of 60 microns.
- the bonding tape is made of copper, provided with an acrylic adhesive on one side. It will for example have a width of 15 mm and a thickness of 90 microns.
- the bonding tape is made of glass fabric provided with an acrylic adhesive on one side. Its width is for example 15 mm and its thickness of 20 microns.
- the flat cables produced according to the three variants defined above comply with standard IEC 332-1 for non-propagation of a flame.
Description
La présente invention concerne un câble électrique ignifugé comportant au moins un conducteur, une couche isolante proche du conducteur en polyoléfine ou polyamide exemte d'halogène et de soufre chargée d'un matériau minéral pour élever son indice d'oxygène limite, et une couche externe rubanée.The present invention relates to a fireproof electrical cable comprising at least one conductor, an insulating layer close to the conductor in polyolefin or polyamide free of halogen and sulfur charged with a mineral material to raise its limit oxygen index, and an outer layer ribboned.
Lorsque le câble doit assurer des fonctions électriques exigeant une vitesse élevée de propagation du signal électrique, une diaphonie excellente, l'isolant doit alors être peu ignifugé puisqu'une forte ignifugation introduit des détériorations des caractéristiques électriques ; dans ce cas l'invention a pour but d'obtenir encore un câble très bon au feu, ignifugé en utilisant un isolant peu ou pas ignifugé et un rubanage externe ne couvrant pas nécessairement toute la surface de la gaine ou de l'isolant, le rubanage assurant l'essentiel de la tenue au feu.When the cable must provide electrical functions requiring a high speed of propagation of the electrical signal, an excellent crosstalk, the insulation must then be little flame retardant since a strong flame retardance introduces deterioration of the electrical characteristics; in this case the object of the invention is also to obtain a cable that is very good at fire, flame retardant by using a little or not flame retardant insulator and an external tape not necessarily covering the entire surface of the sheath or insulator, the tape ensuring most of the fire resistance.
L'invention s'applique en particulier aux câbles pour contrôles et mesures.The invention applies in particular to cables for controls and measurements.
Le document FR-A- 2 377 688 porte notamment sur un câble comportant une isolation de conducteurs en polyoléfine chargée de kaolin, une deuxième isolation après torsadage des conducteurs isolés en polyoléfine chargée d'alumine hydratée, deux rubanages en cuivre à bords de ruban contigus, deux rubanages en polyamide, puis une gaine interne en caoutchouc de silicone.Document FR-A- 2 377 688 relates in particular to a cable comprising an insulation of polyolefin conductors charged with kaolin, a second insulation after twisting of the insulated conductors in polyolefin loaded with hydrated alumina, two copper bands with contiguous ribbon edges , two polyamide tape, then an internal silicone rubber sheath.
Ces câbles, même lorsque leurs isolations en polyoléfine sont très fortement chargées en charge minérale, de façon à assurer des indices d'oxygène limite voisins de 40 à 45, ne présentant pas des propriétés électriques et mécaniques satisfaisantes et répondant à la norme CEI 332-1 de non-propagation d'une flamme (après chauffage d'un élément de fil isolé vertical de 60 cm pendant 60 secondes à l'aide d'un bec Bunsen, extinction de la flamme dans les 30 secondes suivantes avant qu'elle n'ait atteint le haut de l'élément).These cables, even when their polyolefin insulations are very heavily loaded with mineral filler, so as to ensure limit oxygen indices close to 40 to 45, not having satisfactory electrical and mechanical properties and meeting standard IEC 332- 1 flame non-propagation (after heating a 60 cm vertical insulated wire element for 60 seconds using a Bunsen burner, extinguishing the flame within 30 seconds before it 'has reached the top of the element).
La présente invention a pour but de procurer des câbles électriques ignifugés satisfaisant à l'essai de non-propagation de la flamme de la norme CEI 332-1, tout en utilisant des polymères ignifugés chargés de matériau minéral mais exempts d'halogène et de soufre et ayant des propriétés mécaniques satisfaisantes.The object of the present invention is to provide flame retardant electrical cables satisfying the flame non-propagation test of standard IEC 332-1, while using flame retardant polymers charged with mineral material but free of halogen and sulfur and having satisfactory mechanical properties.
L'invention évite donc d'avoir recours à des polymères ayant des taux de charge très élevés pour être fortement ignifugés, ce qui conduit aussi à des caractéristiques mécaniques médiocres ; elle permet d'utiliser, au contraire des polymères à taux de charge moyen compatible avec des caractéristiques mécaniques correctes.The invention therefore avoids having to use polymers having very high filler rates to be highly flame retardant, which also leads to poor mechanical characteristics; on the contrary, it makes it possible to use polymers with an average charge rate compatible with correct mechanical characteristics.
Le rubanage extérieur, bien qu'il ne couvre pas complètement la surface à recouvrir, suffit à atteindre le niveau d'ignifugation exigé par la norme CEI 332-1, alors que le câble réalisé avec le polymère ignifugé sans ce rubanage protecteur serait non conforme.The external tape, although it does not completely cover the surface to be covered, is sufficient to reach the level of fireproofing required by standard IEC 332-1, while the cable made with the flame retardant polymer without this protective tape would be non-compliant .
Le câble selon l'invention est caractérisé en ce que sa couche externe rubanée est recouverte sur sa face interne d'un adhésif acrylique, ignifugé ou non.The cable according to the invention is characterized in that its banded external layer is covered on its internal face with an acrylic adhesive, flame retardant or not.
Il répond en outre de préférence à au moins l'une des caractéristiques suivantes :
- la couche externe rubanée est formée à partir d'un ruban métallique, de tissu de verre, de polyamidimide ou de polyamide aromatique ;
- pour les fils de câblage ne comportant qu'une isolation sans gaine, lorsque le conducteur est de section droite inférieure ou égal à 2 mm², la couche isolante rubanée externe est appliquée avec un facteur de recouvrement de 5 % environ ; lorsque conducteur est de section droite supérieure à 2 mm², sa couche externe rubanée est appliquée avec un déjoint ; lorsque le câble est plat, formé d'une nappe de câbles individuels côte à côte, chacun d'eux comprend deux conducteurs isolés individuellement par un polymère non ignifugé du type polyéthylène, rubanés ensemble avec un ruban polyester non ignifugé, un fil de masse étant appliqué sur le rubanage polyester, l'ensemble étant enveloppé avec un ruban aluminium contrecouché polyester sur une face, puis par une gaine en polyoléfine ou polyamide chargée d'un matériau minéral de façon à présenter un indice d'oxygène limite supérieur à 30, les gaines des câbles côte à côte étant recouvertes par des bandes espacées transversales aux axes des conducteurs, en ruban métallique, de tissu de verre, de polyimide, de polyamidimide ou de polyamide aromatique, recouvert sur sa face interne d'un adhésif acrylique.
- the outer banded layer is formed from a metallic ribbon, glass fabric, polyamidimide or aromatic polyamide;
- for wiring wires with only sheathed insulation, when the conductor is of cross section less than or equal to 2 mm², the external tape insulating layer is applied with a covering factor of approximately 5%; when the conductor is of a cross section greater than 2 mm², its external banded layer is applied with a gap; when the cable is flat, formed of a sheet of individual cables side by side, each of them comprises two conductors individually insulated by a non-flame retardant polymer of the polyethylene type, banded together with a non-flame retardant polyester ribbon, a ground wire being applied to the polyester tape, the whole being wrapped with an aluminum tape coated with polyester on one side, then by a polyolefin or polyamide sheath loaded with a mineral material so as to have a limit oxygen index greater than 30, the cable sheaths side by side being covered by spaced strips transverse to the axes of the conductors, in metallic tape, glass fabric, polyimide, polyamidimide or aromatic polyamide, covered on its internal face with an acrylic adhesive.
Le matériau minéral utilisé utilisé comme charge ignifuge du polymère exempt d'halogène et de soufre peut être du trihydrate d'alumine, de l'hydrate de magnésie, de la craie, un silicate, un borate...The mineral material used used as flame retardant filler of the halogen and sulfur-free polymer can be alumina trihydrate, magnesia hydrate, chalk, silicate, borate ...
La couche rubanée peut aussi être métallique, auquel cas il s'agit de cuivre ou d'aluminium avec un adhésif ignifugé ou non sur une des faces qui sera la face intérieure.The tape layer can also be metallic, in which case it is copper or aluminum with a flame-retardant adhesive or not on one of the faces which will be the inner face.
Il est décrit ci-après, à titre d'exemple et en référence aux figures du dessin annexé, des câbles de section droite circulaire et un câble plat selon l'invention.It is described below, by way of example and with reference to the figures of the appended drawing, cables of circular cross section and a flat cable according to the invention.
La figure 1 représente un câble de section droite circulaire inférieure à 2mm² à couche isolante en polymère ignifugé exempt d'halogène et de soufre et avec une couche ignifuge rubanée avec un faible recouvrement.FIG. 1 represents a cable of circular cross-section less than 2 mm² with an insulating layer of flame-retardant polymer free of halogen and sulfur and with a flame-retardant ribbon-like layer with low overlap.
La figure 2 représente un câble de section droite circulaire de section droite supérieure à 2mm² analogue en tous points au câble de la figure 1, à ceci près que la couche ignifuge rubanée est enroulée avec déjoint.FIG. 2 represents a cable of circular cross section with a straight cross section greater than 2 mm² similar in all points to the cable of FIG. 1, except that the ribbon flame retardant layer is wound up with a gap.
La figure 3 représente un câble plat formé de câbles élémentaires à une paire et un fil de masse, collés les uns aux autres et ayant des rubans déposés en anneaux, séparés les uns des autres et équidistants.FIG. 3 represents a flat cable formed of elementary cables in a pair and a ground wire, glued to each other and having ribbons deposited in rings, separated from each other and equidistant.
Il est donné à titre d'exemples une description plus précise des càbles décrits par les figures 1, 2 et 3.A more precise description of the cables described in FIGS. 1, 2 and 3 is given by way of examples.
Dans les figures 1 et 2, le câble comporte un conducteur central 1 formé de 7 fils toronnés au diamètre de 0,15 mm, entouré par un isolant électrique 2 en polyéthylène ignifugé commercialisé sous la désignation UNIFOS 1386 par UNIFOS ou en polyamide commercialisé sous la désignation MEGOLON I par LONDSAY et WILLIAMS, d'épaisseur 0,50 mm.In FIGS. 1 and 2, the cable comprises a central conductor 1 formed of 7 stranded wires with a diameter of 0.15 mm, surrounded by an
Le polymère est enveloppé d'une couche rubanée ne le recouvrant pas entièrement et qui peut être l'une des suivantes :
- a) un ruban de largeur 4 mm et d'épaisseur 60 microns, en polyimide commercialisé sur la marque "KAPTON" par DUPONT de NEMOURS, recouvert d'un adhésif acrylique sur sa face interne, enroulé hélicoïdalement avec un taux de recouvrement des bords de 5% (fig.1).
- b) un ruban d'aluminium de largeur 4 mm, d'épaisseur 90 microns, recouvert d'un adhésif acrylique sur sa face interne, enroulé hélicoïdalement avec un déjoint de 5% (fig.2).
- c) un ruban de tissu de verre, de largeur 4 mm, d'épaisseur 200 microns, recouvert d'un adhésif acrylique sur sa face interne, enroulé hélicoïdalement avec un déjoint de 25%.
- a) a ribbon of width 4 mm and thickness 60 microns, made of polyimide marketed on the brand "KAPTON" by DUPONT de NEMOURS, covered with an acrylic adhesive on its internal face, wound helically with a rate of overlap of the edges of 5% (fig. 1).
- b) an aluminum strip 4 mm wide, 90 microns thick, covered with an acrylic adhesive on its internal face, wound helically with a 5% gap (fig. 2).
- c) a strip of glass fabric, 4 mm wide, 200 microns thick, covered with an acrylic adhesive on its internal face, wound helically with a 25% gap.
Les trois variantes de câble ci-dessus satisfont à l'essai de la norme CEI 332-1.The above three cable variants meet the test of IEC 332-1.
On a fabriqué par ailleurs un câble en nappe constitué de 20 paires de conducteurs blindées gainées et collées les unes contre les autres. La figure 3 représente cinq de ces paires.A ribbon cable was also made up of 20 pairs of shielded conductors sheathed and glued against each other. Figure 3 shows five of these pairs.
Les conducteurs 1 d'une paire sont des torons de 7 fils de cuivre étamé de diamètre 0,12 mm. Chaque conducteur de la paire est isolé par une couche 2 de polyéthylène d'épaisseur 0,30 mm.The conductors 1 of a pair are strands of 7 tinned copper wires with a diameter of 0.12 mm. Each conductor of the pair is insulated by a
Les deux éléments de chaque paire sont torsadés avec un pas de 38 mm. Chaque paire est recouverte à l'aide d'un ruban de polyester de largeur 8 mm, enroulé hélicoïdalement autour d'elle avec un taux de recouvrement de 50%, non représenté.The two elements of each pair are twisted with a pitch of 38 mm. Each pair is covered with a
Le fil de masse 8 a pour conducteur un toron de 7 fils de cuivre étamé de 0,12 mm de diamètre. La paire rubanée et le fils de masse sont entourés d'un ruban d'aluminium contrecouché par un thermo adhésif polyester, de largeur 8 mm, enroulé hélicoïdalement avec un recouvrement de 50%, également non représenté.
L'ensemble rubané est gainé par une couche 9 de 0,25 mm d'épaisseur de polyéthylène chargé d'alumine hydratée jusqu'à obtenir un indice d'oxygène limite de 40, commercialisé sous la désignation "UNIFOS 5040". Le diamètre final de la paire gainée est de 2,80 mm.The striped assembly is sheathed by a 0.25 mm thick layer 9 of polyethylene loaded with hydrated alumina until a limit oxygen index of 40 is obtained, sold under the designation "UNIFOS 5040". The final diameter of the sheathed pair is 2.80 mm.
Le collage des paires gainées se fait par un traitement à chaud.Bonding of the sheathed pairs is done by a hot treatment.
Un rubanage est effectué à l'aide de bande transversales adhésives 10 équidistantes, séparées par de larges intervalles, par exemple des bandes de 15 mm de largeur espacées de 5 cm, ou même des bandes de 30 mm de largeur espacées de 35 cm. On a observé en effet que de façon surprenante les rubans de protection n'ont pas besoin de recouvrir de façon continue les conducteurs isolés pour assurer une protection efficace contre la propagation de la flamme. Il suffit que les rubans soient en un matériau incombustible, avec un adhésif de contact même combustible appliqué sur sa face interne.A taping is carried out using transverse
Selon une première variante, le ruban de collage peut être en polyimide, notamment en celui commercialisé sous la marque KAPTON par DUPONT de NEMOURS, muni d'un adhésif acrylique sur une face. Ce ruban aura par exemple une largeur de 15 mm et une épaisseur de 60 microns.According to a first variant, the adhesive tape may be made of polyimide, in particular that sold under the brand KAPTON by DUPONT de NEMOURS, provided with an acrylic adhesive on one side. This tape will for example have a width of 15 mm and a thickness of 60 microns.
Selon une deuxième variante, le ruban de collage est en cuivre, muni d'un adhésif acrylique sur une face. Il aura par exemple une largeur de 15 mm et une épaisseur de 90 microns.According to a second variant, the bonding tape is made of copper, provided with an acrylic adhesive on one side. It will for example have a width of 15 mm and a thickness of 90 microns.
Selon une troisième variante, le ruban de collage est en tissu de verre muni d'un adhésif acrylique sur une face. Sa largeur est par exemple de 15 mm et son épaisseur de 20 microns.According to a third variant, the bonding tape is made of glass fabric provided with an acrylic adhesive on one side. Its width is for example 15 mm and its thickness of 20 microns.
Les câbles plats réalisés selon les trois variantes définies ci-dessus satisfont à la norme CEI 332-1 de non-propagation d'une flamme.The flat cables produced according to the three variants defined above comply with standard IEC 332-1 for non-propagation of a flame.
Claims (4)
- Fire-resistant electrical cable comprising at least one conductor (1), a tape-wrap layer (3) and an insulative layer (2) of polymer free of halogen and sulphur and charged with a mineral material in sufficient quantity to achieve a limiting oxygen number greater than 30, characterised in that the insulative layer (2) of polymer free of halogen and sulphur is closest to the conductor, in that the polymer is a polyolefin or a polyamide, and in that the external tape-wrap layer (3) is formed from a metal, woven glass fibre, polyimide, polyamidimide or aromatic polyamide tape covered on its inside surface with an adhesive which may or may not be flame-resistant and which is preferably an acrylic adhesive.
- Cable according to claim 1 with a conductor cross-section of 2 mm² or less characterised in that the outer tape-wrap layer is applied with an overlap of approximately 4% (4, fig 1).
- Cable according to claim 1 with a conductor cross-section greater than 2 mm² characterised in that the outer tape-wrap layer is applied with a gap (5, fig 2).
- Cable according to claim 1, in the form of a flat bundle of cables side by side, characterised in that it comprises two conductors (1) individually insulated by a polyethylene type non-fire-resistant polymer wrapped together with a non-flame-resistant polyester tape, an earth wire (8) being applied over the polyester tape-wrap, the whole being wrapped with an aluminium tape with a polyester backing on one side (7) and then with a polyolefin or polyamide sheath (9) charged with a mineral material so as to achieve a limiting oxygen number greater than 30, the sheaths of the side by side cables being covered by spaced metal, woven glass fibre, polyimide, polyamidimide or aromatic polyamide tapes (10) transverse to the conductor axes covered on the internal surface with an acrylic adhesive.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8614713 | 1986-10-23 | ||
| FR8614713A FR2605792B1 (en) | 1986-10-23 | 1986-10-23 | FIREPROOF ELECTRIC CABLE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0268827A1 EP0268827A1 (en) | 1988-06-01 |
| EP0268827B1 true EP0268827B1 (en) | 1992-04-22 |
Family
ID=9340107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19870115420 Expired - Lifetime EP0268827B1 (en) | 1986-10-23 | 1987-10-21 | Flame-resistant electrical cable |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0268827B1 (en) |
| DE (1) | DE3778493D1 (en) |
| ES (1) | ES2031484T3 (en) |
| FR (1) | FR2605792B1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4941729A (en) * | 1989-01-27 | 1990-07-17 | At&T Bell Laboratories | Building cables which include non-halogenated plastic materials |
| US5024506A (en) * | 1989-01-27 | 1991-06-18 | At&T Bell Laboratories | Plenum cables which include non-halogenated plastic materials |
| GB9707300D0 (en) | 1997-04-10 | 1997-05-28 | Plastic Insulated Cables Ltd | Communications cable |
| CH695840A5 (en) * | 2000-12-12 | 2006-09-15 | Studer Draht & Kabelwerk Ag | A method for manufacturing a cable and cable prepared by this process. |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1554907A1 (en) * | 1966-01-19 | 1970-01-22 | Siemens Ag | Process for the production of plastic-insulated cable cores, in particular power cable cores |
| DE2801542A1 (en) * | 1977-01-17 | 1978-07-20 | Bicc Ltd | ELECTRIC CABLE |
| DE3229352C2 (en) * | 1982-08-06 | 1985-01-24 | AEG-Telefunken Kabelwerke AG, Rheydt, 4050 Mönchengladbach | Halogen-free, flame-retardant cable with functional integrity in the event of fire for a certain period of time |
| CH664230A5 (en) * | 1984-02-08 | 1988-02-15 | Huber+Suhner Ag | INSULATED, ELECTRICAL CABLE. |
| FR2576709B1 (en) * | 1985-01-30 | 1987-02-13 | Fabrication Cables Elect Cie G | ELECTRICAL CABLE WITH FLAME RETARDANT SHEATH |
-
1986
- 1986-10-23 FR FR8614713A patent/FR2605792B1/en not_active Expired - Fee Related
-
1987
- 1987-10-21 EP EP19870115420 patent/EP0268827B1/en not_active Expired - Lifetime
- 1987-10-21 DE DE8787115420T patent/DE3778493D1/en not_active Expired - Fee Related
- 1987-10-21 ES ES87115420T patent/ES2031484T3/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0268827A1 (en) | 1988-06-01 |
| FR2605792A1 (en) | 1988-04-29 |
| DE3778493D1 (en) | 1992-05-27 |
| ES2031484T3 (en) | 1992-12-16 |
| FR2605792B1 (en) | 1990-03-02 |
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