EP2015316A2 - Elektrischer Signalübertragungsdraht für die Luft- und Raumfahrtindustrie - Google Patents

Elektrischer Signalübertragungsdraht für die Luft- und Raumfahrtindustrie Download PDF

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Publication number
EP2015316A2
EP2015316A2 EP08159585A EP08159585A EP2015316A2 EP 2015316 A2 EP2015316 A2 EP 2015316A2 EP 08159585 A EP08159585 A EP 08159585A EP 08159585 A EP08159585 A EP 08159585A EP 2015316 A2 EP2015316 A2 EP 2015316A2
Authority
EP
European Patent Office
Prior art keywords
strands
copper
alloy
wire according
electrical wire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08159585A
Other languages
English (en)
French (fr)
Other versions
EP2015316A3 (de
Inventor
Jean-Pierre Ferlier
Pascal Clouet
Louis Salvat
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.)
FSP One
Nexans SA
Original Assignee
Nexans SA
FSP-one Sas
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 Nexans SA, FSP-one Sas filed Critical Nexans SA
Publication of EP2015316A2 publication Critical patent/EP2015316A2/de
Publication of EP2015316A3 publication Critical patent/EP2015316A3/de
Withdrawn legal-status Critical Current

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    • 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
    • H01B7/0009—Details relating to the conductive cores
    • 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
    • H01B3/303—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups H01B3/38 or H01B3/302
    • 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
    • H01B3/443—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 vinylhalogenides or other halogenoethylenic compounds
    • H01B3/445—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 vinylhalogenides or other halogenoethylenic compounds from vinylfluorides or other fluoroethylenic compounds

Definitions

  • the invention relates to an electrical signal transmission wire for the aerospace industry.
  • It relates more specifically to a data transmission electrical wire having a plurality of conductive strands coated with at least one insulating envelope.
  • Such known wires for the aeronautical industry comprise conductive strands made of copper alloy and an insulating jacket comprising an inner polyimide ribbon and an outer PTFE ribbon.
  • a PTFE layer The purpose of using a PTFE layer is to improve the resistance of the insulated wire to the propagation of the electric arc.
  • the use of a polyimide layer is intended in particular to ensure a mechanical strength of the insulating jacket of the cable.
  • this type of wire In specific applications such as wires and cables for the aerospace industry, this type of wire must be designed to have a reduced mass and volume. It is therefore desired to make a wire of a section of the order of 0.2 to 0.4 mm 2 .
  • the insulating jacket of the wire has a high resistance to cutting and resistance to abrasion, scraping or between wires.
  • the invention solves this problem by using an insulating jacket of acceptable mechanical, electrical and dimensional characteristics and reduced cost.
  • the invention proposes an electrical data transmission wire comprising a plurality of conductive strands coated with at least one insulating envelope comprising PTFE, the plurality of strands comprising an inner core of first strands covered with at least one outer layer of second strands, said first and second strands being made of a different metal, the metal of said second conductors having a hardness less than that of the metal of said first conductors.
  • the peripheral strands of lower hardness tend to deform by compression and to spread over a larger area the breaking force or abrasion of the insulating envelope.
  • a cut resistance greater than 120 N and an abrasion resistance under a force of 8 N greater than or equal to 150 cycles can thus be obtained by using a steel needle, diameter 0.50 mm, to test a wire. electrical section of 0.2 mm 2 , while using an insulating jacket of common mechanical characteristics and reduced cost. (see Table 1, reference "DR24-616 composite 3 + 9" and reference "DR24-616 composite 7 + 12").
  • said first strands may be made of a copper alloy with 2 to 10% by weight of silver or niobium, reinforced with fibers, and said second strands consist essentially of copper.
  • an insulating jacket made of ethylene-tetrafluoroethylene copolymer resin (E-TFE) can be used.
  • this envelope requires a firing of about one minute at a temperature above its melting temperature equal to 342 ° C., this operation being called sintering.
  • a temperature of 380 to 400 ° C is generally applied during this cooking operation of the PTFE casing.
  • an annealing start of this alloy occurs at this temperature.
  • a copper alloy with 2 to 10% by weight of silver or niobium as used according to the previous document has an alpha phase on a reduced composition range and it results in difficulties of preparation and implementation. implemented. The preparation of such an alloy presents risks of obtaining precipitates or indefinite compounds.
  • the cable In addition, in the context of the application to the aerospace industry, the cable must withstand prolonged exposure to a temperature of 260 ° C, of the order of 10000 hours.
  • the breaking strength of a copper alloy and silver or niobium can become of the order of 400 to 500 MPa, when subjected to a temperature of 260 ° C for a prolonged time.
  • the invention solves these technical problems by providing an electrical data wire having a plurality of conductive strands coated with at least one insulating jacket comprising PTFE, which withstands a continuous service temperature of 260 ° C.
  • the invention proposes an electrical data transmission wire comprising a plurality of conductive strands coated with at least one insulating envelope comprising PTFE, the plurality of strands comprising an inner core of first strands covered with at least one outer layer of second strands, said first and second strands being made of a different metal, the metal of said second conductors having a hardness less than that of the metal of said first conductors and said first strands consisting essentially of a copper alloy and said second strands consisting essentially of copper, characterized in that said alloy is a homogeneous copper alloy in the alpha phase and stable at a temperature of less than or equal to 500 ° C.
  • the copper alloy has the advantage over steel of being an excellent conductor and the first strands have a tensile strength greater than 650 MPa.
  • said copper alloy is an alloy of copper, nickel and silicon.
  • This copper alloy may comprise, by weight, at least 95% of copper and at least 2% of nickel, and preferably it comprises by weight 96.5% of copper, 2.5% of nickel and 0.6% of nickel. % of silicon.
  • This copper alloy can also be an alloy of copper, cobalt and beryllium.
  • Said copper alloy may comprise, by weight, at least 95% of copper and 0.5 to 2% of beryllium.
  • Said first strands may be coated with a protective metal layer against oxidation.
  • Said second strands may be coated with a protective metal layer against oxidation.
  • the protective metal layer against oxidation has a thickness of at least 1 micron.
  • the cable preferably comprises a first internal insulating jacket made of polyimide, which has common characteristics and low cost.
  • said outer layer of second strands is concentric with said inner core of first strands.
  • FIG. 1 there is shown an electrical wire having twelve conductive strands.
  • An inner core of first strands has three strands, 1 to 3, and is covered with a concentric layer of second strands of which there are nine, four 12, all these conductive strands of identical diameter, less than 1 mm, preferably of the order of 0.1 mm, being stranded together.
  • the first strands are made of a copper alloy and optionally coated with a nickel layer with a thickness of about 1.3 micron and the second strands are made of copper optionally also coated with a nickel layer. a thickness of about 1.3 micron.
  • the first strands of copper alloy have a breaking load of at least 650 MPa and an elongation rate of between 8 and 13%.
  • the copper alloy can be an alloy of copper, nickel and silicon.
  • this copper alloy comprises, by weight, at least 95% of copper and at least 2% of nickel, and preferably it comprises by weight 96.5% of copper, 2.5% of nickel and 0% of nickel. 6% silicon.
  • Such an alloy has a hardness of between 120 and 160 Vickers.
  • an alloy of copper, cobalt and beryllium comprising, by weight, at least 95% copper and 0.5 to 2% beryllium.
  • Such an alloy has a hardness of the order of 200 Vickers.
  • the second strands of copper have a breaking load of between 200 and 220 MPa, an elongation ratio of between 10 and 25% and a hardness of about 50 Vickers.
  • the outer layer of second strands is concentric with the inner core of first strands.
  • the wiring pitch of the outer layer is between 8 times and 16 times the outer diameter of the strand.
  • This composite strand is coated with a first insulating casing 13 made of a ribboned polyimide tape, which itself is covered with a second outer insulating casing 14 made of a PTFE ribbon tape in the opposite direction to that of the polyimide tape.
  • the conductive strands have a diameter of 0.15 mm
  • the polyimide tape has a thickness of 0.03 mm
  • the PTFE tape has a thickness close to 0.05 mm.
  • Two layers of polyimide tape and two layers of PTFE tape are applied and sealed by heat treatment (see Table 1, reference "DR24-616 composite 3 + 9").
  • This strand having 3 + 9 strands leads to satisfactory mechanical characteristics of the insulator, but its resistance to breakage is lower than the minimum resistance requirement of 350 MPa.
  • An electric wire according to the invention comprising a conductor whose proportion of copper son is lower than previously, can solve this deficiency.
  • An inner core of first strands comprises seven strands, 1 to 7, and is covered with a concentric layer of second strands of which there are twelve, 8 to 19, all these conductors of identical diameter, less than 1 mm, preferably order of 0.1 mm, being stranded together.
  • the first strands consist of a copper alloy optionally coated with a layer of nickel of a thickness of about 1.3 micron and the second strands are made of copper optionally also coated with a layer of nickel of a nickel. thickness of about 1.3 micron.
  • the copper alloy is, advantageously, an alloy of copper, nickel and silicon.
  • this copper alloy comprises, by weight, at least 95% of copper and at least 2% of nickel, and preferably it comprises by weight 96.5% of copper, 2.5% of nickel and 0.6% silicon.
  • This composite strand is coated with a first insulating jacket 20 consisting of a ribboned polyimide tape, of current characteristics and reduced cost, which is itself covered with a second outer insulating jacket 21 consisting of a PTFE tape taped in the opposite direction.
  • the electrical strands have a diameter of 0.115 mm
  • the polyimide tape has a thickness of 0.03 mm
  • the PTFE tape has a thickness of 0.05 mm.
  • Two thicknesses of polyimide tape and two layers of PTFE tape are applied and sealed by heat treatment (see Table 1, reference "DR24-616 composite 7 + 12").
  • the figure 3 is a cross-sectional view illustrating an abrading or cutting test on an electrical wire according to the invention.
  • a needle 22 is applied to the cable and subjected to a certain load.
  • the abrasion or cutting pressure experienced by the insulating sheath is reduced .
  • a cut resistance greater than 120 N and an abrasion resistance under a force of 8 N greater than or equal to 150 cycles can thus be obtained by using a steel needle, diameter 0.50 mm, to test a wire. electrical section 0.2 mm 2 and diameter of 0.9 mm, while using an insulating casing, common mechanical characteristics and reduced cost.
  • an internal polyimide ribbon 13 of common mechanical properties and of reduced cost and with a thickness of the order of 30 microns For example, for the inner insulating jacket, reference polyimide 616 sold by DuPont de Nemours under the trade name Kapton® and by Kaneka under the trade name Apical® may be used.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Non-Insulated Conductors (AREA)
  • Insulated Conductors (AREA)
EP08159585A 2007-07-10 2008-07-03 Elektrischer Signalübertragungsdraht für die Luft- und Raumfahrtindustrie Withdrawn EP2015316A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0756393A FR2918786A1 (fr) 2007-07-10 2007-07-10 Fil electrique de transmission de signaux destine a l'industrie aeronautique et spatiale.

Publications (2)

Publication Number Publication Date
EP2015316A2 true EP2015316A2 (de) 2009-01-14
EP2015316A3 EP2015316A3 (de) 2009-12-02

Family

ID=39156038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08159585A Withdrawn EP2015316A3 (de) 2007-07-10 2008-07-03 Elektrischer Signalübertragungsdraht für die Luft- und Raumfahrtindustrie

Country Status (3)

Country Link
US (1) US7772497B2 (de)
EP (1) EP2015316A3 (de)
FR (1) FR2918786A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2958785A1 (fr) * 2010-04-08 2011-10-14 Nexans Cable electrique composite comportant des brins de cuivre et d'alliage de cuivre/etain

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009060419A1 (de) * 2009-12-22 2011-06-30 HEW-Kabel GmbH & Co.KG, 51688 Zugfester elektrischer Leiter
US20140084070A1 (en) * 2012-09-25 2014-03-27 Infineon Technologies Ag Chip card and method for manufacturing a chip card

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030037957A1 (en) 2001-05-25 2003-02-27 Satoshi Ueno Stranded conductor to be used for movable member and cable using same

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1658186A (en) * 1925-02-21 1928-02-07 Electro Metallurg Co Copper alloy and process of producing and treating the same
US2192497A (en) * 1939-03-13 1940-03-05 Heraeus Vacuumschmelze Ag Beryllium-copper alloys
US2842438A (en) * 1956-08-02 1958-07-08 American Metal Climax Inc Copper-zirconium alloys
US3683103A (en) * 1971-07-07 1972-08-08 J & J Equity Co Multi-strand electrical conductor
FR2687500B1 (fr) * 1992-02-13 1994-04-01 Alcatel Cuivre Cable electrique a ame de cuivre multibrins.
JPH0613014U (ja) * 1992-07-17 1994-02-18 沖電線株式会社 同軸ケーブル及び同軸入り複合ケーブル
JP4170497B2 (ja) * 1999-02-04 2008-10-22 日本碍子株式会社 ハーネス用電線導体
JP4000729B2 (ja) * 1999-12-15 2007-10-31 日立電線株式会社 同軸ケーブル及びその製造方法
EP1191545A1 (de) * 2000-09-20 2002-03-27 Nexans Litzenleiter
FR2876493B1 (fr) * 2004-10-12 2007-01-12 F S P One Soc Par Actions Simp Cable toronne en aluminium cuivre, et procede pour sa fabrication.
JP2007042475A (ja) * 2005-08-04 2007-02-15 Sumitomo Wiring Syst Ltd 自動車用電線

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030037957A1 (en) 2001-05-25 2003-02-27 Satoshi Ueno Stranded conductor to be used for movable member and cable using same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2958785A1 (fr) * 2010-04-08 2011-10-14 Nexans Cable electrique composite comportant des brins de cuivre et d'alliage de cuivre/etain

Also Published As

Publication number Publication date
EP2015316A3 (de) 2009-12-02
US20090065234A1 (en) 2009-03-12
US7772497B2 (en) 2010-08-10
FR2918786A1 (fr) 2009-01-16

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