EP0032326B1 - Insulated multifilament electrical cable with protected conductors suitable for soldering and non-thermo-tacky - Google Patents

Insulated multifilament electrical cable with protected conductors suitable for soldering and non-thermo-tacky Download PDF

Info

Publication number
EP0032326B1
EP0032326B1 EP80401676A EP80401676A EP0032326B1 EP 0032326 B1 EP0032326 B1 EP 0032326B1 EP 80401676 A EP80401676 A EP 80401676A EP 80401676 A EP80401676 A EP 80401676A EP 0032326 B1 EP0032326 B1 EP 0032326B1
Authority
EP
European Patent Office
Prior art keywords
alloy
cable
lead
conductors
protected
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
Application number
EP80401676A
Other languages
German (de)
French (fr)
Other versions
EP0032326A1 (en
Inventor
Bernard Kremer
Germaine Binder
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.)
Thomson-Brandt SA
Original Assignee
Thomson-Brandt 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
Application filed by Thomson-Brandt SA filed Critical Thomson-Brandt SA
Publication of EP0032326A1 publication Critical patent/EP0032326A1/en
Application granted granted Critical
Publication of EP0032326B1 publication Critical patent/EP0032326B1/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/10—Lead or alloys based thereon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H01B1/026—Alloys based on copper
    • 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
    • H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12687—Pb- and Sn-base components: alternative to or next to each other
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12701—Pb-base component

Definitions

  • the present invention relates to an insulated multi-wire electric cable with protected conductors, weldable and non-fusible.
  • Some cables for aeronautics consist of electrical conductor strands or strands protected by a metallic coating, and insulated either by a sheath of thermoplastic polymer, or by a polyimide taping, taping which can be covered by a sheath of thermoplastic polymer.
  • the protected electrical conductors of these known cables are copper wires traditionally covered either with tin, or with silver, or with nickel.
  • This heat sealing is due to the fact that the melting point of the tin is 232 ° C.
  • the wires protected with nickel have the drawback of not being weldable and oblige the user to carry out crimping operations or chemical pickling of the nickel when making connections.
  • Silver-protected wires are well suited, but they have the disadvantage of being expensive on the one hand, and on the other hand protection against electrochemical corrosion of copper is not ensured since silver does not realize cathodic protection.
  • Lead alloys such as that with 30% tin and 70% lead have the drawback of no longer being weldable after accelerated aging treatments of 96 hours in air and at a temperature of 155 ° C. or 4 hours at 100 ° C in water vapor, according to the tests described in French standard NFC 20630 paragraph 2.5.
  • the loss of weldability is due in particular to a diffusion of copper in the alloy layer which leads to the formation of an intermetallic compound of Cu 3 Sn type which cannot be welded.
  • Alloys of the lead-silver type have the drawback of being sensitive to atmospheric humidity during prolonged storage, which results in a complete loss of weldability.
  • the wettability at a temperature of the order of 350 ° C. of the alloy is excellent, otherwise the metallic coatings are eccentric and the weldability or solder is defective, the covering of the electrical conductor by the alloy taking place. by the hot dipping process, at a temperature of the order of 350 ° C.
  • a tin alloy with a high lead content is already known and described in document DE-C-813622 as a means of protection against oxidation of an electrical conductor in bare or insulated copper.
  • an alloy comprising 92 to 97% of lead, 3 to 8% of tin and 0.3 to 0.6% of antimony makes it possible to protect against oxidation, an electrical conductor in copper working at a high temperature of the order of 275 to 300 ° C.
  • the aim of the present invention is to produce an economical multi-wire cable with non-fusible electrical conductors remaining individually separated even after an operation of electrical insulation of their twist and having good protection. cathodic, and good weldability even after accelerated aging such as one of the aging described in French standard NFC 20630.
  • Such a multi-wire electric cable is the subject of the first three claims appended hereto.
  • the indicated percentages of the metallic constituents of the alloys described and claimed in the context of the invention are percentages by weight.
  • an intermetallic layer is not formed between the conductor and the alloy after accelerated aging of this conductor.
  • the good wettability characteristics of the alloy coating the conductors of the cable of the invention make it possible to advantageously use the hot dipping process for the coating of these conductors.
  • the hot dipping process provides highly adherent coatings which guarantee good welding or soldering even in the case of automatic welding.
  • This process also makes it possible to obtain non-porous, very compact coatings which ensure good protection against oxidation in the event of prolonged storage as well as good weldability after accelerated aging.
  • Such coatings produced in accordance with the invention provide good protection of the cable conductors against corrosion even in the case where a lead-silver alloy is used. This seems surprising, since lead-silver alloys mentioned in a previous paragraph are reputed to be sensitive to humidity.
  • the coatings of the conductors of the cable produced according to the invention also make it possible to avoid bonding of these conductors during the operation of insulating their twist, for example, by extruding a thermoplastic or thermosetting sheath or else sealing the tape. , operations taking place at temperatures of 300-350 ° C. This seems surprising since it was recognized that these coatings had to have a melting point above 400 ° C to avoid any melting or softening which would cause bonding between the conductors of the tordon, which explains why the silver and incidentally the nickel are generally used as protective metals for these conductors.
  • the coating thickness of these conductors is between one and ten microns and preferably between one and five microns.
  • the method of coating the copper wire is according to the invention, the method of dipping in a bath of molten alloy.
  • An annealed copper wire with a diameter of 0.20 mm is firstly cleaned by passing over felts soaked in trichloroethane III, volatile solvent, with a boiling point of 74 ° C.
  • the dry wire then passes over felts soaked in an etching-pickling liquid composed of a solution of 1N hydrochloric acid, ie one gram molecule of acid per liter.
  • the wire is then passed through a 350 ° C bath of molten lead-silver alloy Pb Ag 3, 97.5% lead and 2.5% silver for 100% alloy.
  • a diamond die used for the drawing of copper wires, is placed just at the exit of the bath; it allows the alloy deposit to be calibrated to obtain a thickness of 3 microns.
  • the internal diameter of the die is 0.208 0 mm.
  • the drop weldability of the wire thus protected, measured in accordance with French standard NFC 20630 paragraph 2.8 is 0.3 seconds at 235 ° C.
  • the weldability in an alloy bath of the wire protected according to paragraph 2.6 of the French standard NFC 20630 is good at 235 ° C.
  • the drop weldability of the protected wire measured after the accelerated aging of 16 hours at 155 ° C according to paragraph 2.53 of the French standard NFC 20630 is 1 second at 235 ° C.
  • 19 protected wires of this type are assembled to obtain a 19 x 0.20 mm twist.
  • the twist obtained is isolated by a double crossover taping with a polyimide tape coated with fluoroethylenepropylene for example sold under the brand KAPTON SG 16 of width 1/4 inch or 6.35 mm, by the firm DUPONT de NEMOURS.
  • the overlap of the ribbons is 51%.
  • the ribbon tape is finally brought for sealing in an oven whose temperature is adjusted to 320-330 ° C to obtain the cable of the invention.
  • the thickness of the coating alloy layer of this wire is 5 microns.
  • the temperature of the molten alloy bath for the dip coating of this wire is 350 ° C.
  • the diameter of the die used for the calibration of this coating is 0.21 20 mm.
  • the drop weldability of the wire thus protected is 0.2 seconds at 235 ° C.
  • the weldability in an alloy bath of the wire protected according to French standard NFC 20630 paragraph 2.8 is good at 235 ° C.
  • the weldability of the protected wire in an alloy bath after accelerated aging for 4 hours in boiling water paragraph 2.51 of the French standard NFC 20630 is good at 235 ° C.
  • Double taping of this twist is carried out with a ribbon of the same type as that of Example 1.
  • the sealing of the tords of the twist obtained is carried out by passage through an oven at a temperature of 320-330 ° C.
  • the taped and sealed twist then passes ten times in succession through a bath of polyimide varnish sold, for example, under the brand Liquid H by the firm DUPONT de NEMOURS. After each coating by passage through the varnish bath, this twist passes through an oven at a temperature of 400 ° C.
  • the extra thickness of insulation from the varnish after drying and firing is 80 microns in diameter.
  • a copper wire protected by a Pb Sn 8 alloy consisting of 92% lead, 8% tin, for 100% alloy is produced under conditions similar to those of Example 1.
  • the thickness of the coating alloy layer of this wire is 1 micron.
  • the die used for the calibration of this coating has a diameter of 0.203 2 mm.
  • the temperature of the molten alloy bath for a dip coating of this wire is 350 ° C.
  • the drop weldability of the wire thus protected measured according to French standard NFC 20630 is 0.3 seconds at 235 ° C.
  • the weldability in an alloy bath of this protected wire is good and the weldability of the latter with a drop after aging for 4 hours in boiling water is 1 second at 325 ° C.
  • 19 protected wires of this type are assembled to obtain a 19 x 0.20 mm twist.
  • the twist then passes through an extruder supplied with ethylene tetrafluoroethylene marketed for example under the brand TEFZEL 200 by the firm DUPONT de NEMOURS, at a temperature of about 330 ° C.
  • the thickness of the coating deposited is 0.2 mm.
  • the strands of the twist are not glued together, and that the weldability of the twist takes place at 235 ° C. with a tin-lead filler alloy 60/40, in less than a second.
  • the thickness of the deposited coating layer is 5 microns.
  • the die used for the calibration of this coating is 0.212 0 mm.
  • the temperature of the bath of the molten alloy for a dip coating of this wire is 350 ° C.
  • the drop weldability of the wire thus protected measured according to French standard NFC 20630 is 0.2 seconds at 235 ° C.
  • the weldability of this protected wire in an alloy bath is good at 235 ° C.
  • the weldability of the latter after aging for 16 hours at 155 ° C. is also good.
  • 19 protected wires of this type are assembled to obtain a 19 x 0.20 mm twist.
  • This twist is covered by a double taping like that described in Example 1.
  • the coating technique is the same as that described in Example 2.
  • Drying and cooking are also done at a temperature of 400 ° C.
  • FEP fluoroethylene propylene polymer

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Insulated Conductors (AREA)
  • Coating With Molten Metal (AREA)

Description

La présente invention concerne un câble électrique multifilaire isolé et à conducteurs protégés, soudables et non thermocollants.The present invention relates to an insulated multi-wire electric cable with protected conductors, weldable and non-fusible.

Certains câbles pour l'aéronautique par exemple sont constitués de tordons ou torons de conducteurs électriques protégés par un revêtement métallique, et isolés, soit par une gaine de polymère thermoplastique, soit par un rubannage de polyimide, rubannage qui peut être recouvert par une gaine de polymère thermoplastique. Les conducteurs électriques protégés de ces câbles connus sont des fils de cuivre recouverts traditionnellement soit par de l'étain, soit par de l'argent, soit par du nickel.Some cables for aeronautics, for example, consist of electrical conductor strands or strands protected by a metallic coating, and insulated either by a sheath of thermoplastic polymer, or by a polyimide taping, taping which can be covered by a sheath of thermoplastic polymer. The protected electrical conductors of these known cables are copper wires traditionally covered either with tin, or with silver, or with nickel.

Pour des conditions d'environnement sévères, les conducteurs de cuivre protégés par un revêtement d'argent sont utilisés préférentiellement pour les raisons suivantes :

  • Les fils de cuivre protégés avec de l'étain ne conviennent pas car l'isolation du tordon par un revêtement rubanné ou une gaine polymère, à des températures de l'ordre de 300-350 °C, provoque un thermocollage entre les brins du tordon.
For severe environmental conditions, copper conductors protected by a silver coating are preferably used for the following reasons:
  • Copper wires protected with tin are not suitable because the insulation of the strand by a tape coating or a polymer sheath, at temperatures of the order of 300-350 ° C, causes a heat bonding between the strands of the strand .

Ce thermocollage est dû au fait que le point de fusion de l'étain est de 232 °C.This heat sealing is due to the fact that the melting point of the tin is 232 ° C.

Ce thermocollage entraîne des désavantages car les câbles obtenus sont peu malléables, et du fait de la migration de l'étain, certaines zones de la surface des conducteurs en cuivre ne sont plus protégées par l'étain, ce qui conduit à des manques de soudabilité et à des possibilités de corrosion.This heat-bonding involves disadvantages because the cables obtained are not very malleable, and due to the migration of tin, certain areas of the surface of the copper conductors are no longer protected by the tin, which leads to lack of solderability. and the possibility of corrosion.

Les fils protégés avec du nickel présentent l'inconvénient de ne pas être soudables et obligent l'utilisateur d'effectuer des opérations de sertissage ou de décapage chimique du nickel lors de la réalisation de connexions.The wires protected with nickel have the drawback of not being weldable and oblige the user to carry out crimping operations or chemical pickling of the nickel when making connections.

Les fils protégés à l'argent conviennent bien, mais ils présentent l'inconvénient d'être coûteux d'une part, et d'autre part la protection contre la corrosion électrochimique du cuivre n'est pas assurée puisque l'argent ne réalise pas une protection cathodique.Silver-protected wires are well suited, but they have the disadvantage of being expensive on the one hand, and on the other hand protection against electrochemical corrosion of copper is not ensured since silver does not realize cathodic protection.

On a pensé que les protections au plomb, métal dont le point de fusion est de 321 °C, sembleraient convenir pour le câble à conducteurs soudables et non thermocollants, mais il se trouve que le plomb a une soudabilité ou brasabi- lité insuffisante lors de l'utilisation avec un alliage d'apport d'étain plomb 60/40 et que le plomb mouille mal le cuivre, ce qui ne permet pas de réaliser des fils électriques correctement protégés au plomb au point de vue aspect de surface et répartition uniforme de plomb.It has been thought that protections with lead, a metal with a melting point of 321 ° C, would seem to be suitable for cables with weldable conductors and not heat-bonding, but it turns out that lead has insufficient solderability or solderability during use with a 60/40 lead filler alloy and lead does not wet the copper well, which does not allow electrical wires to be properly protected with lead in terms of surface appearance and uniform distribution of lead.

Des alliages de plomb tels que celui à 30 % d'étain et 70 % de plomb, présentent l'inconvénient de ne plus être soudables après des traitements de vieillissement accéléré de 96 heures à l'air et à une température de 155 °C ou de 4 heures à 100 °C dans la vapeur d'eau, selon les tests décrits dans la norme française NFC 20630 paragraphe 2.5.Lead alloys such as that with 30% tin and 70% lead have the drawback of no longer being weldable after accelerated aging treatments of 96 hours in air and at a temperature of 155 ° C. or 4 hours at 100 ° C in water vapor, according to the tests described in French standard NFC 20630 paragraph 2.5.

La perte de soudabilité est due notamment à une diffusion de cuivre dans la couche d'alliage qui conduit à la formation d'un composé intermétallique type Cu3Sn non soudable.The loss of weldability is due in particular to a diffusion of copper in the alloy layer which leads to the formation of an intermetallic compound of Cu 3 Sn type which cannot be welded.

Des alliages du type plomb-argent présentent l'inconvénient d'être sensibles à l'humidité atmosphérique lors d'un stockage prolongé, ce qui entraîne une perte de soudabilité complète.Alloys of the lead-silver type have the drawback of being sensitive to atmospheric humidity during prolonged storage, which results in a complete loss of weldability.

Il en ressort qu'il est difficile d'avoir dans un alliage à la fois une bonne soudabilité après vieillissement de 96 heures à 155 °C à l'air ou de 4 heures à 100 °C dans la vapeur d'eau, et une bonne mouillabilité par alliage fondu pour des conducteurs électriques.This shows that it is difficult to have in a alloy both good weldability after aging for 96 hours at 155 ° C in air or 4 hours at 100 ° C in steam, and a good wettability by molten alloy for electrical conductors.

Et pourtant, pour des câbles à conducteurs soudables et non thermocollants, il est nécessaire que la soudabilité après vieillissement accéléré soit bonne, car elle présente une facilité d'effectuer des soudures ou brasures rapidement même si le temps de stockage des câbles a été plus ou moins long.And yet, for cables with weldable conductors and not fusible, it is necessary that the weldability after accelerated aging is good, because it has an ease of carrying out soldering or brazing quickly even if the storage time of the cables has been more or less long.

Il est nécessaire également que la mouillabilité à une température de l'ordre de 350 °C de l'alliage soit excellente, sinon les revêtements métalliques sont excentrés et la soudabilité ou brasure est défectueuse, le recouvrement du conducteur électrique par l'alliage se faisant par le procédé au trempage à chaud, à une température de l'ordre de 350 °C.It is also necessary that the wettability at a temperature of the order of 350 ° C. of the alloy is excellent, otherwise the metallic coatings are eccentric and the weldability or solder is defective, the covering of the electrical conductor by the alloy taking place. by the hot dipping process, at a temperature of the order of 350 ° C.

Par ailleurs, avant que ce problème de non-thermocollage des conducteurs soudables d'un câble électrique multifilaire ne soit identifié ou posé, un alliage d'étain à forte teneur de plomb est déjà connu et décrit dans le document DE-C-813622 comme un moyen de protection contre l'oxydation d'un conducteur électrique en cuivre nu ou isolé. Selon un exemple donné dans ce document, un alliage comportant de 92 à 97 % de plomb, 3 à 8 % d'étain et 0,3 à 0,6 % d'antimoine permet de protéger contre l'oxydation, un conducteur électrique en cuivre travaillant à une température élevée de l'ordre de 275 à 300 °C.Furthermore, before this problem of non-heat sealing of the weldable conductors of a multi-wire electric cable is identified or posed, a tin alloy with a high lead content is already known and described in document DE-C-813622 as a means of protection against oxidation of an electrical conductor in bare or insulated copper. According to an example given in this document, an alloy comprising 92 to 97% of lead, 3 to 8% of tin and 0.3 to 0.6% of antimony makes it possible to protect against oxidation, an electrical conductor in copper working at a high temperature of the order of 275 to 300 ° C.

La présente invention, ayant pour but d'éviter les inconvénients du thermocollage rappelés ci- dessus, permet de réaliser un câble multifilaire économique à conducteurs électriques non thermocollants restant individuellement séparés même après une opération d'isolation électrique de leur tordon et présentant une bonne protection cathodique, et une bonne soudabilité même après un vieillissement accéléré tel que l'un des vieillissements décrits dans la norme française NFC 20630.The aim of the present invention, with the aim of avoiding the drawbacks of heat-bonding mentioned above, is to produce an economical multi-wire cable with non-fusible electrical conductors remaining individually separated even after an operation of electrical insulation of their twist and having good protection. cathodic, and good weldability even after accelerated aging such as one of the aging described in French standard NFC 20630.

Un tel câble électrique multifilaire fait l'objet des trois premières revendications ci-annexées. Les pourcentages indiqués des constituants métalliques des alliages décrits et revendiqués dans le cadre de l'invention sont des pourcentages en poids.Such a multi-wire electric cable is the subject of the first three claims appended hereto. The indicated percentages of the metallic constituents of the alloys described and claimed in the context of the invention are percentages by weight.

Dans le câble électrique réalisé selon l'invention, il ne se forme pas de couche intermétallique entre le conducteur et l'alliage après des vieillissements accélérés de ce conducteur.In the electric cable produced according to the invention, an intermetallic layer is not formed between the conductor and the alloy after accelerated aging of this conductor.

D'autre part les bonnes caractéristiques de mouillabilité de l'alliage revêtant les conducteurs du câble de l'invention permettent d'utiliser avantageusement le procédé de trempage à chaud pour le revêtement de ces conducteurs.On the other hand, the good wettability characteristics of the alloy coating the conductors of the cable of the invention make it possible to advantageously use the hot dipping process for the coating of these conductors.

Cet avantage est important, car si ces conducteurs sont protégés par l'argent ou le nickel, ces métaux ne peuvent être déposés que par électrolyse, ces revêtements de protection obtenus sont poreux, et conservent une partie des composés chimiques du bain d'électrolyse.This advantage is important, because if these conductors are protected by silver or nickel, these metals can only be deposited by electrolysis, these protective coatings obtained are porous, and retain part of the chemical compounds of the electrolysis bath.

La présence de ces composés chimiques ainsi que la porosité du revêtement de protection sont nuisibles à la bonne soudabilité après vieillissement accéléré. Elles favorisent une corrosion chimique.The presence of these chemical compounds as well as the porosity of the protective coating are detrimental to good weldability after accelerated aging. They promote chemical corrosion.

Le procédé de trempage à chaud permet d'obtenir des revêtements fortement adhérents qui garantissent une bonne soudure ou brasure même en cas de soudage automatique.The hot dipping process provides highly adherent coatings which guarantee good welding or soldering even in the case of automatic welding.

Ce procédé permet également d'obtenir des revêtements non poreux, très compacts qui permettent d'assurer une bonne protection à l'oxydation en cas de stockage prolongé ainsi qu'une bonne soudabilité après vieillissement accéléré.This process also makes it possible to obtain non-porous, very compact coatings which ensure good protection against oxidation in the event of prolonged storage as well as good weldability after accelerated aging.

De tels revêtements réalisés conformément à l'invention assurent une bonne protection des conducteurs du câble contre la corrosion même dans le cas où est utilisé un alliage plomb-argent. Ceci paraît surprenant, car des alliages plomb-argent rappelés dans un paragraphe précédent, sont réputés d'être sensibles à l'humidité.Such coatings produced in accordance with the invention provide good protection of the cable conductors against corrosion even in the case where a lead-silver alloy is used. This seems surprising, since lead-silver alloys mentioned in a previous paragraph are reputed to be sensitive to humidity.

Les revêtements des conducteurs du câble réalisé selon l'invention permet d'éviter également le collage de ces conducteurs lors de l'opération d'isolation de leur tordon par exemple, par extrusion d'une gaine thermoplastique ou thermodurcissable ou bien de scellage du rubannage, opérations se déroulant à des températures de 300-350 °C. Ceci paraît surprenant puisqu'il était admis qu'il fallait que ces revêtements aient un point de fusion supérieur à 400 °C pour éviter toute fusion ou ramollissement qui entraîneraient un collage entre conducteurs du tordon, ce qui explique que l'argent et accessoirement le nickel soient généralement utilisés comme métaux de protection de ces conducteurs.The coatings of the conductors of the cable produced according to the invention also make it possible to avoid bonding of these conductors during the operation of insulating their twist, for example, by extruding a thermoplastic or thermosetting sheath or else sealing the tape. , operations taking place at temperatures of 300-350 ° C. This seems surprising since it was recognized that these coatings had to have a melting point above 400 ° C to avoid any melting or softening which would cause bonding between the conductors of the tordon, which explains why the silver and incidentally the nickel are generally used as protective metals for these conductors.

Selon un mode de réalisation préférentiel l'épaisseur de revêtement de ces conducteurs est comprise entre un et dix microns et préférentiellement de entre un et cinq microns.According to a preferred embodiment, the coating thickness of these conductors is between one and ten microns and preferably between one and five microns.

Des épaisseurs de revêtement plus fortes provoquent, lors de la mise des conducteurs en tordon, des difficultés dues au poudrage laissé par ces revêtements sur les guides et poulies.Higher coating thicknesses cause difficulties when the conductors are twisted, due to the dusting left by these coatings on the guides and pulleys.

Selon un mode de réalisation préféré, un alliage destiné à revêtir les conducteurs du câble, est choisi parmi les alliages ayant des compositions suivantes :

  • - des alliages plomb-argent où pour 100 % d'alliage la teneur en plomb varie de 90 à 99 % et la teneur en argent varie de 10 à 1 % ;
  • - des alliages plomb-étain où pour 100% d'alliage la teneur en plomb varie de 90 à 99 % et la teneur en étain varie de 10 à 1 % ;
  • - des alliages plomb-étain-argent où pour 100 % d'alliage la teneur en plomb varie de 90 à 99 % et les teneurs en étain peuvent varier de 1 à 10 %, le complément à 100 % étant constitué par de l'argent.
According to a preferred embodiment, an alloy intended to coat the conductors of the cable is chosen from alloys having the following compositions:
  • - lead-silver alloys where for 100% of alloy the lead content varies from 90 to 99% and the silver content varies from 10 to 1%;
  • - lead-tin alloys where for 100% of alloy the lead content varies from 90 to 99% and the tin content varies from 10 to 1%;
  • - lead-tin-silver alloys where for 100% of alloy the lead content varies from 90 to 99% and the tin contents can vary from 1 to 10%, the complement to 100% being constituted by silver .

Le procédé de revêtement du fil de cuivre est selon l'invention, le procédé au trempé dans un bain d'alliage fondu.The method of coating the copper wire is according to the invention, the method of dipping in a bath of molten alloy.

Pour mieux faire comprendre l'invention, un certain nombre d'exemples de réalisation sont donnés ci-après.To better understand the invention, a certain number of embodiments are given below.

Exemple 1Example 1

Un fil de cuivre recuit d'un diamètre de 0,20 mm est tout d'abord nettoyé par passage sur des feutres imbibés de trichloroéthane III, solvant volatil, de point d'ébullition 74 °C.An annealed copper wire with a diameter of 0.20 mm is firstly cleaned by passing over felts soaked in trichloroethane III, volatile solvent, with a boiling point of 74 ° C.

Le fil sec passe ensuite sur des feutres imbibés d'un liquide de mordançage-décapage composé d'une solution d'acide chlorhydrique 1 N, soit une molécule gramme d'acide par litre. Le fil passe ensuite dans un bain à 350 °C d'alliage fondu de plomb-argent Pb Ag 3, à 97,5 % de plomb et à 2,5 % d'argent pour 100% d'alliage.The dry wire then passes over felts soaked in an etching-pickling liquid composed of a solution of 1N hydrochloric acid, ie one gram molecule of acid per liter. The wire is then passed through a 350 ° C bath of molten lead-silver alloy Pb Ag 3, 97.5% lead and 2.5% silver for 100% alloy.

Une filière en diamant, utilisée pour le tréfilage des fils de cuivre, est placée juste à la sortie du bain ; elle permet de calibrer le dépôt d'alliage pour obtenir une épaisseur de 3 microns. Le diamètre interne de la filière est de 0,208 0 mm.A diamond die, used for the drawing of copper wires, is placed just at the exit of the bath; it allows the alloy deposit to be calibrated to obtain a thickness of 3 microns. The internal diameter of the die is 0.208 0 mm.

La soudabilité à la goutte du fil ainsi protégé, mesurée conformément à la norme française NFC 20630 paragraphe 2.8 est de 0,3 seconde à 235 °C. La soudabilité au bain d'alliage du fil protégé selon le paragraphe 2.6 de la norme française NFC 20630 est bonne à 235 °C. La soudabilité à la goutte du fil protégé mesurée après le vieillissement accéléré de 16 heures à 155 °C selon le paragraphe 2.53 de la norme française NFC 20630 est de 1 seconde à 235 °C.The drop weldability of the wire thus protected, measured in accordance with French standard NFC 20630 paragraph 2.8 is 0.3 seconds at 235 ° C. The weldability in an alloy bath of the wire protected according to paragraph 2.6 of the French standard NFC 20630 is good at 235 ° C. The drop weldability of the protected wire measured after the accelerated aging of 16 hours at 155 ° C according to paragraph 2.53 of the French standard NFC 20630 is 1 second at 235 ° C.

Dans une réalisation d'un câble de l'invention, 19 fils protégés de ce type sont assemblés pour obtenir un tordon de 19 x 0,20 mm.In one embodiment of a cable of the invention, 19 protected wires of this type are assembled to obtain a 19 x 0.20 mm twist.

Le tordon obtenu est isolé par un double rubannage croisé avec un ruban de polyimide couché avec du fluoroéthylènepropylène par exemple commercialisé sous la marque KAPTON SG 16 de largeur 1/4 de pouce ou 6,35 mm, par la firme DUPONT de NEMOURS.The twist obtained is isolated by a double crossover taping with a polyimide tape coated with fluoroethylenepropylene for example sold under the brand KAPTON SG 16 of width 1/4 inch or 6.35 mm, by the firm DUPONT de NEMOURS.

Le recouvrement des rubans est de 51 %.The overlap of the ribbons is 51%.

Le tordon rubanné est enfin amené pour scellage dans un four dont la température est réglée à 320-330 °C pour obtenir le câble de l'invention.The ribbon tape is finally brought for sealing in an oven whose temperature is adjusted to 320-330 ° C to obtain the cable of the invention.

Dans une opération de contrôle on a constaté que le tordon du câble réalisé, dénudé est bien soudable à 235 °C avec un alliage d'apport Sn Pb à 60/40 et que les 19 brins composant le tordon ne sont pas collés les uns aux autres.In a control operation, it was found that the bead of the stripped cable is well weldable at 235 ° C. with a 60/40 Sn Pb filler alloy and that the 19 strands making up the bead are not glued to each other. other.

Exemple IlExample II

On réalise dans des conditions similaires à l'exemple 1 un fil de cuivre protégé par un alliage Pb Sn Ag 2 à 97 % de plomb, 1 % d'étain et 2 % d'argent pour 100 % d'alliage.We realize under conditions similar to Example 1 a copper wire protected by a Pb Sn Ag 2 alloy with 97% lead, 1% tin and 2% silver for 100% alloy.

L'épaisseur de la couche d'alliage de revêtement de ce fil est de 5 microns. La température du bain d'alliage fondu pour le revêtement au trempé de ce fil est de 350 °C. Le diamètre de la filière utilisée pour le calibrage de ce revêtement est de 0,212 0 mm.The thickness of the coating alloy layer of this wire is 5 microns. The temperature of the molten alloy bath for the dip coating of this wire is 350 ° C. The diameter of the die used for the calibration of this coating is 0.21 20 mm.

La soudabilité à la goutte du fil ainsi protégé, mesurée selon la norme française NFC 20630 paragraphe 2.8 est de 0,2 secondes à 235 °C. La soudabilité au bain d'alliage du fil protégé selon la norme française NFC 20630 paragraphe 2.8 est bonne à 235 °C. La soudabilité au bain d'alliage du fil protégé après vieillissement accéléré de 4 heures à l'eau bouillante paragraphe 2.51 de la norme française NFC 20630 est bonne à 235 °C.The drop weldability of the wire thus protected, measured according to French standard NFC 20630 paragraph 2.8 is 0.2 seconds at 235 ° C. The weldability in an alloy bath of the wire protected according to French standard NFC 20630 paragraph 2.8 is good at 235 ° C. The weldability of the protected wire in an alloy bath after accelerated aging for 4 hours in boiling water paragraph 2.51 of the French standard NFC 20630 is good at 235 ° C.

Dans une réalisation d'un câble de l'invention. un tordon de 19 x 0,20 mm est obtenu avec des fils protégés de ce type.In an embodiment of a cable of the invention. a 19 x 0.20 mm twist is obtained with protected wires of this type.

On procède à un double rubannage de ce tordon avec un ruban du même type que celui de l'exemple 1.Double taping of this twist is carried out with a ribbon of the same type as that of Example 1.

Le scellage des rubans du tordon obtenu s'effectue par passage dans un four dont la température est de 320-330 °C.The sealing of the tords of the twist obtained is carried out by passage through an oven at a temperature of 320-330 ° C.

Le tordon rubanné et scellé passe ensuite dix fois de suite dans un bain de vernis polyimide commercialisé par exemple sous la marque Liquid H par la firme DUPONT de NEMOURS. Après chaque enduction par passage dans le bain de vernis, ce tordon passe dans un four à une température de 400 °C.The taped and sealed twist then passes ten times in succession through a bath of polyimide varnish sold, for example, under the brand Liquid H by the firm DUPONT de NEMOURS. After each coating by passage through the varnish bath, this twist passes through an oven at a temperature of 400 ° C.

La technique utilisée pour cette enduction est celle qui est couramment employée pour la fabrication de fils émaillés.The technique used for this coating is that which is commonly used for the manufacture of enameled wires.

La surépaisseur d'isolant provenant du vernis après séchage et cuisson est de 80 microns au diamètre.The extra thickness of insulation from the varnish after drying and firing is 80 microns in diameter.

Au cours d'une opération de contrôle du câble ainsi obtenu on remarque que les brins du tordon du câble ne sont pas collés entre eux et que la partie dénudée du tordon est soudable à 235 °C avec un alliage d'apport Sn Pb 60/40.During a cable control operation thus obtained, it is noted that the strands of the cable twist are not glued together and that the stripped portion of the twist is weldable at 235 ° C. with a filler alloy Sn Pb 60 / 40.

Exemple IIIExample III

On réalise dans des conditions similaires à celles de l'exemple 1 un fil de cuivre protégé par un alliage Pb Sn 8 constitué par 92 % de plomb, 8 % d'étain, pour 100 % d'alliage.A copper wire protected by a Pb Sn 8 alloy consisting of 92% lead, 8% tin, for 100% alloy is produced under conditions similar to those of Example 1.

L'épaisseur de la couche d'alliage de revêtement de ce fil est de 1 micron. La filière utilisée pour le calibrage de ce revêtement a un diamètre de 0,203 2 mm. La température du bain d'alliage fondu pour un revêtement au trempé de ce fil est de 350 °C.The thickness of the coating alloy layer of this wire is 1 micron. The die used for the calibration of this coating has a diameter of 0.203 2 mm. The temperature of the molten alloy bath for a dip coating of this wire is 350 ° C.

La soudabilité à la goutte du fil ainsi protégé, mesurée selon la norme française NFC 20630 est de 0,3 seconde à 235 °C. La soudabilité au bain d'alliage de ce fil protégé est bonne et la soudabilité de ce dernier à la goutte après vieillissement de 4 heures à l'eau bouillante est de 1 seconde à 325 °C.The drop weldability of the wire thus protected, measured according to French standard NFC 20630 is 0.3 seconds at 235 ° C. The weldability in an alloy bath of this protected wire is good and the weldability of the latter with a drop after aging for 4 hours in boiling water is 1 second at 325 ° C.

Dans une réalisation d'un câble de l'invention, 19 fils protégés de ce type sont assemblés pour obtenir un tordon de 19 x 0,20 mm.In one embodiment of a cable of the invention, 19 protected wires of this type are assembled to obtain a 19 x 0.20 mm twist.

Le tordon passe ensuite dans une extrudeuse alimentée avec de l'éthylène tétrafluoroéthylène commercialisé par exemple sous la marque TEFZEL 200 par la firme DUPONT de NEMOURS, à une température de l'ordre de 330 °C.The twist then passes through an extruder supplied with ethylene tetrafluoroethylene marketed for example under the brand TEFZEL 200 by the firm DUPONT de NEMOURS, at a temperature of about 330 ° C.

L'épaisseur du revêtement déposé est de 0,2 mm.The thickness of the coating deposited is 0.2 mm.

Au cours de l'opération de contrôle du câble ainsi obtenu, on remarque que les brins du tordon ne sont pas collés ensemble, et que la soudabilité du tordon s'effectue à 235 °C avec un alliage d'apport d'étain-plomb 60/40, en moins d'une seconde.During the cable control operation thus obtained, it is noted that the strands of the twist are not glued together, and that the weldability of the twist takes place at 235 ° C. with a tin-lead filler alloy 60/40, in less than a second.

Exemple IVExample IV

On réalise dans des conditions similaires à celles de l'exemple 1, un fil protégé par un alliage Pb Ag 5, dont la teneur en plomb est de 94,5 % et la teneur en argent de 5,5 % pour 100 % d'alliage.Is carried out under conditions similar to those of Example 1, a wire protected by a Pb Ag 5 alloy, the lead content of which is 94.5% and the silver content of 5.5% for 100% of alloy.

L'épaisseur de la couche de revêtement déposé est de 5 microns. La filière utilisée pour le calibrage de ce revêtement est de 0,212 0 mm. La température du bain de l'alliage fondu pour un revêtement au trempé de ce fil est de 350 °C.The thickness of the deposited coating layer is 5 microns. The die used for the calibration of this coating is 0.212 0 mm. The temperature of the bath of the molten alloy for a dip coating of this wire is 350 ° C.

La soudabilité à la goutte du fil ainsi protégé, mesurée selon la norme française NFC 20630 est de 0,2 seconde à 235 °C. La soudabilité au bain d'alliage de ce fil protégé est bonne à 235 °C. La soudabilité de ce dernier après vieillissement de 16 heures à 155 °C est également bonne.The drop weldability of the wire thus protected, measured according to French standard NFC 20630 is 0.2 seconds at 235 ° C. The weldability of this protected wire in an alloy bath is good at 235 ° C. The weldability of the latter after aging for 16 hours at 155 ° C. is also good.

Dans une réalisation d'un câble de l'invention, 19 fils protégés de ce type sont assemblés pour obtenir un tordon de 19 x 0,20 mm.In one embodiment of a cable of the invention, 19 protected wires of this type are assembled to obtain a 19 x 0.20 mm twist.

Ce tordon est recouvert par un double rubannage comme celui décrit à l'exemple 1.This twist is covered by a double taping like that described in Example 1.

Le tordon scellé au four à 320-330 °C, passe ensuite dans un bain de solution de fluoroéthylène propylène commercialisé par exemple sous la marque TEFLON 120 par la firme DUPONT de NEMOURS.The twist sealed in the oven at 320-330 ° C, then passes through a bath of propylene fluoroethylene solution marketed for example under the brand TEFLON 120 by the firm DUPONT de NEMOURS.

La technique d'enduction est la même que celle décrite dans l'exemple 2.The coating technique is the same as that described in Example 2.

Le séchage et la cuisson se font également à une température de 400 °C.Drying and cooking are also done at a temperature of 400 ° C.

La surépaisseur de polymère de fluoroéthylène propylène (FEP) déposée est de 90 microns au diamètre.The extra thickness of fluoroethylene propylene polymer (FEP) deposited is 90 microns in diameter.

Au cours d'une opération de contrôle du câble ainsi obtenu, on remarque que les brins du tordon du câble ne sont pas collés entre eux et que la soudabilité du tordon s'effectue à 235 °C avec un alliage d'étain-plomb 60/40 en moins d'une seconde.During a cable control operation thus obtained, it is noted that the strands of the cable twist are not glued together and that the weldability of the twist takes place at 235 ° C. with a tin-lead alloy 60 / 40 in less than a second.

Claims (4)

1. An electric multiwire cable with an insulating sheath which is applied under elevated temperature, i. e. at a temperature of about 300 to 350 °C, and with conductors which are individually protected by a coating of an alloy containing tin, characterized in that it comprises electric conductors which are individually coated by a layer of an alloy comprising only lead and tin, which permits their non-thermo-gluing during the application of the insulating sheath of the cable at elevated temperature, and to present a good wetability and an excellent solderability, even after an accelerated aging, and which is constituted of an alloy comprising for 100 % by weight of the alloy a lead content of more than 90 % by weight.
2. An electric multiwire cable with an insulating sheath which is applied under elevated temperature, i. e. at a temperature of about 300 to 350 °C, and with conductors which are individually protected by a coating of an alloy containing tin, characterized in that it comprises electric conductors which are individually coated by a layer of an alloy comprising only lead and silver, which permits their non-thermogluing during the application of the insulating sheath of the cable at elevated temperatures, and to present a good wetability and an excellent solderability, even after accelerated aging, and which is constituted of an alloy comprising for 100 % by weight of the alloy a lead content from 90 to 99 % by weight and a silver content varying from 10 to 1 % by weight.
3. A electric multiwire cable with an insulating sheath which is applied under elevated temperature, i. e. at a temperature of about 300 to 350 °C, and with conductors which are individually protected by a coating of an alloy containing tin, characterized in that it comprises electric conductors which are individually coated by a layer of an alloy comprising only lead, tin and silver, which permits their non-thermo-gluing during the application of the insulating sheath of the cable at elevated temperatures, and to present a good wetability and an excellent solderability, even after accelerated aging, and which is constituted of an alloy comprising for 100 % by weight of the alloy a lead content higher than 90 % and lower than 99 % by weight, a tin content lower than 10 % and higherthan 1 %, and a complement to 100 % by weight of the alloy being constituted by silver.
4. A cable according to one of the claims 1 to 3, characterized in that it comprises electric conductors which are individually coated by an alloy layer with a thickness going from one to ten ¡.¡.m according to the dipping process employed.
EP80401676A 1979-12-18 1980-11-21 Insulated multifilament electrical cable with protected conductors suitable for soldering and non-thermo-tacky Expired EP0032326B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7930938 1979-12-18
FR7930938A FR2472252A1 (en) 1979-12-18 1979-12-18 ISOLATED MULTIFILARY ELECTRICAL CABLE WITH PROTECTIVE CONDUCTORS, WELDING AND NON THERMO TIGHTENING

Publications (2)

Publication Number Publication Date
EP0032326A1 EP0032326A1 (en) 1981-07-22
EP0032326B1 true EP0032326B1 (en) 1985-04-24

Family

ID=9232874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401676A Expired EP0032326B1 (en) 1979-12-18 1980-11-21 Insulated multifilament electrical cable with protected conductors suitable for soldering and non-thermo-tacky

Country Status (4)

Country Link
US (1) US4524241A (en)
EP (1) EP0032326B1 (en)
DE (1) DE3070560D1 (en)
FR (1) FR2472252A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT385932B (en) * 1985-12-13 1988-06-10 Neumayer Karl BAND OR WIRE SHAPED MATERIAL
EP0312495A3 (en) * 1987-10-16 1989-08-30 Institut Straumann Ag Electrical cable for carrying out at least one stimulation and/or measurement in a human or animal body
ITMI20022672A1 (en) * 2002-12-18 2004-06-19 Paolo Agostinelli ELECTRIC CONDUCTORS.
US7696611B2 (en) * 2004-01-13 2010-04-13 Halliburton Energy Services, Inc. Conductive material compositions, apparatus, systems, and methods
US10421161B2 (en) * 2016-05-06 2019-09-24 Honeywell International Inc. High quality, void and inclusion free alloy wire

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR886010A (en) * 1941-09-10 1943-10-01 Hermes Patentverwertungs Gmbh Metal protection of copper or copper alloy objects, in particular on wires for rubber-insulated electrical conduits
US2515022A (en) * 1947-04-02 1950-07-11 Anaconda Wire & Cable Co Method of tinning copper wire
DE813622C (en) * 1948-10-02 1951-09-13 Siemens Schuckertwerke A G Copper wire provided with a metallic protective coating

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US30348A (en) * 1860-10-09 Improvement in seed-planters
US2056017A (en) * 1933-03-18 1936-09-29 Gen Electric High tension oil-filled cable
US2718494A (en) * 1952-04-03 1955-09-20 Charles L Faust Metallic coating for wire
US2734025A (en) * 1954-02-04 1956-02-07 Twatktnw att
US3103067A (en) * 1959-08-13 1963-09-10 Westinghouse Electric Corp Process of soldering to a ceramic or glass body
SE317730B (en) * 1968-03-06 1969-11-24 Ericsson Telefon Ab L M
GB1204052A (en) * 1968-04-23 1970-09-03 Engelhard Ind Ltd Improvements in or relating to soft-solder coated wire, strip or tape
US3753278A (en) * 1970-03-23 1973-08-21 Tatsuta Densen Kk Solder coated wire
US3692924A (en) * 1971-03-10 1972-09-19 Barge Inc Nonflammable electrical cable
CA1011834A (en) * 1975-04-18 1977-06-07 Zvi Paniri Self-supporting cable

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR886010A (en) * 1941-09-10 1943-10-01 Hermes Patentverwertungs Gmbh Metal protection of copper or copper alloy objects, in particular on wires for rubber-insulated electrical conduits
US2515022A (en) * 1947-04-02 1950-07-11 Anaconda Wire & Cable Co Method of tinning copper wire
DE813622C (en) * 1948-10-02 1951-09-13 Siemens Schuckertwerke A G Copper wire provided with a metallic protective coating

Also Published As

Publication number Publication date
US4524241A (en) 1985-06-18
EP0032326A1 (en) 1981-07-22
FR2472252A1 (en) 1981-06-26
FR2472252B1 (en) 1982-08-20
DE3070560D1 (en) 1985-05-30

Similar Documents

Publication Publication Date Title
EP1158542B1 (en) Flexible coaxial cable and its manufacturing method
EP1816656B1 (en) Electric cable protected against corrosion
US9022821B2 (en) Crimped connection of a wire with a terminal having vapor deposited film
FR2722330A1 (en) COAXIAL CABLE
FR2591802A1 (en) PROTECTION AGAINST OXIDATION OF COPPER CONNECTION BAGS BY MEANS OF PALLADIUM
EP0032326B1 (en) Insulated multifilament electrical cable with protected conductors suitable for soldering and non-thermo-tacky
EP0122826B1 (en) Easily connectible and directly solderable multi-wired electrical conductor
EP0197227A1 (en) Electrical cable, especially for aerospatial use, with improved electrical characteristics
WO2017178734A1 (en) Electrical cable with improved resistance to galvanic corrosion
EP1693857A1 (en) Electrical lead wire with aluminium or aluminium alloy core
JP2022003613A (en) Coaxial cable, method for manufacturing coaxial cable, and cable assembly
CN102082001B (en) Flat cable and manufacturing method thereof
EP2808874B1 (en) Electric cable including at least one electrically insulating layer
CA1318113C (en) Manufacturing process for conductor flexible electric cable with aluminum or aluminum alloy thin wires
JP2013037840A (en) Shield cable, multicore cable, method for forming terminal of shield cable, and method for forming terminal of multicore cable
JPS6333245B2 (en)
US11201001B2 (en) Isolated electrically conductive element and method for manufacturing the same
US3800067A (en) Method of manufacturing an electrically insulated metallic conductor with the insulation adhering to the conductor, and product
EP3913643A1 (en) Cable having improved corrosion resistance
JPH08241633A (en) Coaxial cable and manufacture thereof
BE644973A (en)
JP2675249B2 (en) Coaxial ribbon cable for batch crimping connector
JPH065127A (en) Insulated stranded wire
FR2541499A1 (en) Cabled conductor and device for applying a coating to a wire which is a constituent of the said cabled conductor
FR2881871A1 (en) Electrical wire for forming single strand electrical conductor, has core with outer layer made of nickel/zinc alloy, where outer layer is passivated by chromium, molybdate or phosphate, and nickel and zinc alloy is core deposition on core

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE GB IT LU NL SE

17P Request for examination filed

Effective date: 19811209

ITF It: translation for a ep patent filed
RBV Designated contracting states (corrected)

Designated state(s): BE DE GB IT NL

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE DE GB IT NL

REF Corresponds to:

Ref document number: 3070560

Country of ref document: DE

Date of ref document: 19850530

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19931130

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19940929

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19940930

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19941024

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19950601

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19951121

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19951130

BERE Be: lapsed

Owner name: THOMSON-BRANDT

Effective date: 19951130

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19951121

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19960903