EP0258036B1 - Isolierte Leitung mit hochtemperaturbeständiger Multischichtisolierung - Google Patents

Isolierte Leitung mit hochtemperaturbeständiger Multischichtisolierung Download PDF

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Publication number
EP0258036B1
EP0258036B1 EP19870307504 EP87307504A EP0258036B1 EP 0258036 B1 EP0258036 B1 EP 0258036B1 EP 19870307504 EP19870307504 EP 19870307504 EP 87307504 A EP87307504 A EP 87307504A EP 0258036 B1 EP0258036 B1 EP 0258036B1
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EP
European Patent Office
Prior art keywords
layer
insulation
conductor
polyimide
lacquer
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.)
Revoked
Application number
EP19870307504
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English (en)
French (fr)
Other versions
EP0258036A2 (de
EP0258036A3 (en
Inventor
Norman Ralph Harlow
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Carlisle Corp
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Carlisle Corp
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Filing date
Publication date
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Publication of EP0258036A3 publication Critical patent/EP0258036A3/en
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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
    • H01B7/02—Disposition of insulation
    • H01B7/0208—Cables with several layers of insulating material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H01B13/141—Insulating conductors or cables by extrusion of two or more insulating layers
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat

Definitions

  • This invention relates to an insulated conductor with a plurality of layers of insulation able to withstand relatively high temperatures and mechanical abuse and to the manufacture thereof.
  • Insulated conductors which have insulation which is satisfactory for use at relatively high temperatures, i.e. 200°C and higher, are desirable for many applications and particularly for installation in aircraft and missiles.
  • One such insulated conductor is described in Military Specification Sheet MIL-W-81381/7E and comprises a plurality of stranded wires plated with silver or nickel and surrounded by two helical layers of fluorocarbon/polyimide tape, the outer layer of tape being coated with an aromatic polyimide resin.
  • the tape may be a film of the type sold by E.I. DuPont de Nemours & Co., Wilmington, Delaware, U.S.A.
  • such tape being a thermoset polyimide film combined with a fluorinated ethylene-propylene copolymer film for sealing purposes.
  • the polyimide resin coating is used to provide color identification and to smooth and help protect the tapes with respect to the environment.
  • the described insulation conductor will meet a 200°C temperature rating requirement, it has several disadvantages.
  • the main disadvantage is the problem of proper adhesion of the coating to the tape because of its tendency to hydrolize.
  • Other disadvantages are the necessity of winding two layers of opposite hand with proper overlap and the problem of maintaining dimensions at tape splices.
  • Another insulated conductor has two extruded layers of irradiated, and hence, cross-linked, ethylenetetrafluoroethylene copolymer (ETFE).
  • EFE ethylenetetrafluoroethylene copolymer
  • polyimide both thermoplastic and thermoset
  • polyimide has good high temperature properties, it is difficult to apply it directly to the conductors because of air in the interstices of the conductors and the polyimide has strong adhesion to the conductors making it difficult to strip the insulation.
  • Polyimide layers are also subject to cracking and hydrolyzing unless the cross-linking thereof is substantially perfect, perfection being difficult to obtain under usual manufacturing conditions.
  • One object of the invention is to provide an insulated conductor which can be temperature rated at at least 200°C.
  • Another object of the invention is to overcome problems with insulated conductors described hereinbefore.
  • an insulated conductor in which the insulation comprises a first layer which envelops and is operatively connected to the conductor, a second layer which envelops and is operatively connected to the first layer, and a third layer which envelops and is operatively connected to the second layer, and the insulation having a temperature rating greater than 150°C, characterised in that the first layer comprises a perfluoroalkoxy resin, the second layer comprises a polyimide resin, the third layer comprises a plastic selected from the group consisting of perfluoroalkoxy and ethylenetetrafluoroethylene copolymer resins, and the first layer not comprising tape.
  • each of the three layers of insulation is extruded over the conductor, or the conductor with one or more layers of insulation thereon, in an alternative embodiment, one or more, or all, the layers may be applied by conventional coating techniques.
  • Figure 1 illustrates an insulated conductor of the invention which comprises a central conductor 1 formed, in this case, by a plurality of copper wires.
  • the conductor could be a single wire.
  • the wire or wires are plated with a metal such as tin, silver or nickel. Tin may be used if the insulated conductor is to be rated at 150°C, silver, if the insulated conductor is to be rated at 200°C or nickel, if the insulated conductor is to be rated at above 200°C, e.g. 250°C.
  • nickel may be used for all such ratings, and silver may be used for all ratings up to 200°C.
  • the temperature rating of the insulated conductor of the invention is determined from the tests described in the Military Specification MIL-W-81381A and the tests referred to therein.
  • the insulated conductor of the invention may be rated at above 200°C, e.g. 250°C, if the wire or wires are coated with nickel. Of course, in some cases, particularly, if it is not necessary to meet a military specification, the plating metal may be omitted.
  • the conductor 1 is covered by a first layer 2 extruded or coated thereover and in contact therewith.
  • the layer 2 is a layer of PFA, a thermoplastic, which is extruded or coated over the conductor 1 by conventional wire covering equipment and techniques. The layer 2 is allowed to cool after application to the conductor 1.
  • the first layer 2 After the first layer 2 is set, it is covered by a second layer 3 which is extruded or coated over the layer 2 and is in contact therewith.
  • a second layer 3 which is extruded or coated over the layer 2 and is in contact therewith.
  • the outer surface of the layer 2 is etched by conventional methods, such as by acid or plasma, before the layer 3 is extruded or coated thereover so as to improve the adhesion between layers 2 and 3.
  • second layer 3 is formed by coating of the first layer 2
  • the coating is applied in a conventional manner, using a lacquer comprising thermosettable polyimide in a known solvent.
  • the lacquer may include other known materials to prevent settling of the polyimide and for other purposes. If the polyimide is a thermoplastic, it can be extruded over the first layer 2 in a conventional manner.
  • a lacquer which contains at least 20% by weight of polyimide solids, so that the lacquer has a relatively high viscosity is extruded over the layer 2.
  • a relatively thick layer of the polyimide e.g. 1-2 mils in thickness, can be applied to the layer 2 without requiring several passes of the conductor 1 with the layer 2 thereon through a bath of polyimide lacquer.
  • Figures 2 and 3 illustrate a novel process and apparatus for use in producing the insulated conductor according to the invention for extruding a polyimide containing lacquer over an elongated article, such as the conductor 1 covered with the layer 2.
  • the process and apparatus can also be used for covering other articles, such as tubes, rods, wires etc.
  • the conductor with the layer 2 thereon is fed from a reel 7 through an etching bath 8 where the exterior surface of the layer 2 is etched.
  • the insulated conductor 6a is then passed through a bath 9 to remove the etchant and is thereafter dried.
  • the conductor 6a is then passed around a pulley 10 to change its direction to a vertical path so that when the lacquer is applied thereto, it does not sag to one side of the conductor axis and make the layer 3 non-concentric with the axis of the conductor.
  • the conductor 6a passes through the bore of a die insert 11 having an extension 12 and received in a die body 13.
  • the insert 11 has a groove 14 and the body 13 has a groove 15 for receiving a retaining clip (not shown) which retains the insert 11 in the body 13.
  • a layer of the viscous polyimide lacquer is extruded thereover to provide an insulated conductor, designated as 6b, insulated by the layers 2 and 3, and the insulated conductor 6b, is passed through an oven 16, which represents a series of ovens, where the lacquer solvent is driven off and the layer 3 becomes thermoset.
  • the temperature in the ovens 16 is selected based on the boiling point of the solvent and the temperature required for the cross-linking of the polyimide, and the temperature normally increases from the entrance to the oven 16 to the exit from the oven 16. For example, the temperature at the entrance may be 250°C-300°C and the temperature at the exit may be 600°C.
  • the time of transit of the insulated conductor 6b through the oven 16 is selected so as to both remove the solvent and cross-link, or thermoset, the polyimide.
  • the die comprising the body 13 and the insert 11, has a cavity 17 around the extension 12 which receives, through the opening 18 in the body 13 (see Figures 2 and 3) the lacquer 23 which forms the layer 3.
  • the lacquer 23 is extruded in tubular form around the insulated conductor 6a by reason of the extension 12, and contracts around the layer 2.
  • the layer 3 is of uniform thickness around, and concentric with, the axis of the conductor.
  • the polyimide containing lacquer is supplied under pressure from the metering pump 19 by way of the line 21 and is supplied to the pump 19 from any conventional source by way of the line 22.
  • the lacquer which is supplied to the opening 18 may contain a conventional cross-linking agent, such as a acetic anhydride and beta-picoline.
  • the cross-linking agent is supplied to the pump 19 as indicated in Figure 2 by another metering pump (not shown).
  • the pressure at which the lacquer is supplied to the opening 18 depends, as is known to those skilled in the art, upon several factors including the viscosity of the lacquer and the speed at which the insulated conductor passes through the die. With a lacquer of the type described hereinafter, the pressure may be on the order of 150-200 psi.
  • Polyimide lacquers containing at least 15% by weight of the lacquer of thermosettable polyimide solids are commercially available but are usually used for coating purposes. Such lacquers also usually contain suspensoids, anti-oxidants and other materials in minor amounts.
  • the solvent used depends on various factors, but the polyimide solids content and the solvent employed for the lacquer are selected so that the lacquer has a relatively high viscosity. Preferably, the polyimide solids content is at least 25% and the lacquer has a viscosity of at least 200,000 centipoises.
  • One suitable solvent is normal methyl pyrrolidone.
  • a lacquer which has been found to be satisfactory has 25% by weight of the lacquer of thermosettable polyimide solids in such solvent and has a viscosity of about 240,000 centipoises.
  • a thermoset layer 3 of 1-2 mils in thickness can be obtained with a single pass through the die shown in Figure 2.
  • Figure 4 illustrates a modified form of the die insert 11 shown in Figures 2 and 3.
  • the die of Figures 2 and 3 is preferred because it gives better control of the thickness and concentricity of the layer 3, a die with the insert 11a shown in Figure 4 may be found to be satisfactory.
  • the die body 13 is the same as the die body shown in Figures 2 and 3, and the insert 11a is substantially the same as the insert 11, except for the extension 12a which is shorter than the extension 12 or which may be omitted entirely.
  • the lacquer 23 impinges directly on the insulated conductor 6a within the cavity 17.
  • the insulated conductor 6a may be displaced radially by the lacquer 23 causing the layer 3 to be not concentric with the axis of the conductor at various points in the direction of the axis of the conductor which, however, can be acceptable for some end uses for the insulated conductor.
  • thermosetting of the polyimide can be accomplished by other conventional methods.
  • the cross-linking agent can be omitted, and the thermosetting of the polyimide can be caused by heat alone or by irradiation of the layer 3.
  • the layer 3 of polyimide lacquer is extruded or coated over the layer 2, the layer 3 is heated in a known manner to remove the solvent and to cause the material of the layer 3 to become thermoset.
  • a third layer 4 is extruded or coated over the layer 3.
  • the third layer 4 can be a plastic material which will withstand the temperature to which the insulated conductor is subjected and which will protect the layer 3 from the environment, such as PFA, EFTE, but for a temperature rating of 200°C and higher, it is preferred that the third layer 4 comprise PFA which is extruded or coated over the layer 3 in a conventional manner.
  • ETFE is used, it is extruded or coated over the layer 3 in a conventional manner.
  • the radial thicknesses of the layers 2, 3 and 4 may be selected so as to provide the desired radial thickness of insulation. For example, if the desired total thickness is 7 mils, the layers 2 and 4 may have thicknesses of 3 mils and the layer 3 may have a thickness of 1 mil. It is not necessary that the layers 2 and 4 have the same thickness, but normally the thicknesses of the layers 2 and 4 will be greater than the thickness of the layer 3, e.g., up to three times or more of the thickness of the layer 3.
  • An insulated conductor made as described hereinbefore will have a temperature rating of at least 150°C, and if made with a layer 4 of PFA, will have a temperature rating in excess of 200°C.
  • each layer of insulation is applied by extrusion which permits close control of the dimensions and concentricity of the insulation and eliminates multiple passes of the conductor through a liquid in obtaining any of the layers. Furthermore, no wrapping or splicing of tapes is required.
  • the application of the polyimide resin directly to the conductor, and its attendant problems, is eliminated, and the problems of cracking, separating and hydrolizing of the polyimide layer are avoided or overcome.
  • the various layers of insulating material may be applied while the conductor is advanced lengthwise using conventional extrusion equipment which is used to extrude insulation over a conductor.
  • the first layer is extruded thereover.
  • the second layer is extruded thereover.
  • the conductor with the first and second layers thereon are advanced lengthwise, and the third layer is extruded thereover.
  • Each layer may be applied individually, i.e.
  • an insulated conductor of the invention may be manufactured in a continuous operation with the conductor being fed into one end of the production line and with the complete insulated conductor exiting from the other end of the line.
  • the insulated conductor of the invention may be used by itself or with a further insulating layer or a conductive sheath therearound.
  • a plurality of such conductors may be stranded to form twisted pairs or may be assembled in a bundle covered by a protective sheath.
  • several insulated conductors may be placed in side-by-side relation and be bonded together at their contacting surfaces.
  • Fig. 5 illustrates three insulated conductors 6 of the invention stranded together and surrounded by a sheath 20 of plastic material.
  • the plastic material for the sheath is selected to provide the desired temperature rating, as described hereinbefore, and for example, if the temperature rating is to be 200°C or higher, the plastic material can be PFA.
  • the plastic materials may have conventional fillers which do not materially affect the desired properties of the insulation of the cable in an adverse manner.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)

Claims (16)

  1. Isolierung eines isolierten Leiters, wobei die Isolierung eine erste Schicht (2), die den Leiter (1) umhüllt und wirkam mit diesem verbunden ist, eine weite Schicht (3), die die erste Schicht (2) umhüllt und wirksam mit dieser verbunden ist, und eine dritte Schicht (4) aufweist, die die zweite Schicht (3) umhüllt und wirksam mit dieser verbunden ist, und wobei die Isolierung eine Temperaturauslegung für mehr als 150°C aufweist, dadurch gekennzeichnet, daß die erste Schicht (2) ein Perfluoralkoxyharz enthält, die zweite Schicht (3) ein Polyimidharz enthält, die dritte Schicht (4) einen aus der Gruppe bestehend aus Perfluoralkoxyund Ethylentetrafluorethylen-Mischpolymerisatharzen ausgewählten Kunststoff enthält, und die erste Schicht kein Band enthält.
  2. Isolierung nach Anspruch 1, wobei das Isolationskunststoffmaterial der ersten Schicht (2) und der dritten Schicht (4) Perfluoralkoxyharz ist, und die lsolierung eine Temperaturauslegung für mindestens 200°C aufweist.
  3. Isolierung nach Anspruch 1 oder 2, wobei die zweite Schicht (3) mit der ersten Schicht (2) in Kontakt steht und die dritte Schicht (4) mit der zweiten Schicht (3) in Kontakt steht.
  4. Isolierung nach den Ansprüchen 1 bis 3, wobei die radialen Dicken der ersten Schicht (2) und der dritten Schicht (4) größer als die radiale Dicke der leiten Schicht (3) sind.
  5. Isolierung nach einem der vorhergehenden Ansprüche, wobei das Polyimidharz der leiten Schicht thermisch ausgehärtet ist.
  6. Isolierung nach einem der vorhergehenden Ansprüche, wobei mindestens eine der Schichten thermoplastisch ist.
  7. Isolierung nach einem der vorhergehenden Ansprüche, wobei die zweite Schicht eine extrudierte Schicht ist.
  8. Isolierung nach einem der Ansprüche 1 bis 6, wobei mindestens eine der Schichten eine extrudierte Schicht ist.
  9. Isolierung nach einem der Ansprüche 1 bis 6, wobei jede der Schichten eine extrudierte Schicht ist.
  10. Isolierung nach Anspruch 1, wobei mindestens eine der Schichten eine aufgezogene Schicht ist.
  11. Ein Verfahrung zur Herstellung einer Isolierung für einen Leiter nach einem der Ansprüche 1 bis 10, wobei das Verfahren durch folgende Merkmale gekennzeichnet ist:
    während der Leiter (1) der Lange nach vorwärts bewegt wird, wird die erste Schicht (2) aus Perfluoralkoxyharz um ihn herum und in Kontakt mit ihm aufgetragen;
    während der Leiter (1) mit der ersten Schicht (2) darum der Länge nach vorwärts bewegt wird, wird die zweite Schicht (3) aus Polyimidharz um die erste Schicht (2) herum aufgetragen; und
    während der Leiter (1) mit der ersten Schicht (2) und der zweiten Schicht (3) darum der Länge nach vorwärts bewegt wird, wird die dritte Schicht (4) aus einem Kunststoff, der aus der Gruppe bestehend aus Perfluoralkoxy- und Ethylentetrafluorethylen-Mischpolymerisatharze ausgewählt ist, aufgetragen.
  12. Ein Verfahren nach Anspruch 11, wobei die äußere Oberfläche der ersten Schicht (2) vor dem Aufextrudieren der zweiten Schicht (3) geätzt wird.
  13. Ein Verfahren nach Anspruch 11, wobei die zweite Schicht (3) durch Extrudieren eines viskosen Lacks um die erste Schicht (2) herum aufgetragen wird, wobei der Lack ein Lösungsmittel und Polyimid enthält, wobei der Gewichtsanteil der Polyimidfeststoffe im Lack mindestens 20 % beträgt und wobei das Lösungsmittel aus der zweiten Schicht durch deren Erwärmung entfernt wird.
  14. Ein Verfahren nach Anspruch 13, wobei das Polyimid im Lack während der Erwärmung der zweiten Schicht (3) zur Entfernung des Lösungsmittels thermisch ausgehärtet wird.
  15. Ein Verfahren nach einem der Ansprüche 13 oder 14, wobei das Kunststoffmaterial der dritten Schicht ein Perfluoralkoxygemisch ist.
  16. Ein Verfahren nach Anspruch 13, wobei das Kunststoffmaterial der ersten Schicht und der dritten Schicht ein Perfluoralkoxygemisch ist.
EP19870307504 1986-08-28 1987-08-25 Isolierte Leitung mit hochtemperaturbeständiger Multischichtisolierung Revoked EP0258036B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US90174086A 1986-08-28 1986-08-28
US901740 1986-08-28

Publications (3)

Publication Number Publication Date
EP0258036A2 EP0258036A2 (de) 1988-03-02
EP0258036A3 EP0258036A3 (en) 1988-06-08
EP0258036B1 true EP0258036B1 (de) 1993-07-07

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ID=25414733

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870307504 Revoked EP0258036B1 (de) 1986-08-28 1987-08-25 Isolierte Leitung mit hochtemperaturbeständiger Multischichtisolierung

Country Status (3)

Country Link
EP (1) EP0258036B1 (de)
JP (1) JPS6358709A (de)
DE (1) DE3786429T2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7276664B2 (en) 1996-06-07 2007-10-02 Belden Technologies, Inc. Cable with dual layer jacket
CN102334167A (zh) * 2009-02-27 2012-01-25 泰科电子公司 具有交联外层的多层绝缘导体
CN102334168A (zh) * 2009-02-27 2012-01-25 泰科电子公司 具有交联的外层的多层绝缘导体

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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
JPH03110720U (de) * 1989-12-06 1991-11-13
JPH03106626U (de) * 1990-05-12 1991-11-05
JPH03110721U (de) * 1990-05-12 1991-11-13
JPH04101314U (ja) * 1991-02-20 1992-09-01 東京特殊電線株式会社 高周波変圧器巻線用多層絶縁電線
EP0583521B2 (de) * 1992-08-12 2002-02-06 Totoku Electric Co., Ltd. Mehrlagig isolierter Draht für Hochfrequenztransformatorwindung
EP0673044B1 (de) * 1992-08-19 1997-01-22 Totoku Electric Co., Ltd. Mehrlagig isolierter Draht für Hochfrequenz Transformatorwindung
US5606152A (en) * 1992-10-28 1997-02-25 The Furukawa Electric Co., Ltd. Multilayer insulated wire and a manufacturing method therefor
FR2712115A1 (fr) * 1993-11-05 1995-05-12 Filotex Sa Câble blindé, à faible niveau de bruit et de température de service élevée.
CA2157322C (en) * 1995-08-31 1998-02-03 Gilles Gagnon Dual insulated data communication cable
EP1255259B1 (de) 1997-02-14 2006-11-29 Denso Corporation Stiftförmige Zündspule mit verbesserter Struktur zur Vermeidung von Rissen oder dielektrischer Entladung
US6977574B1 (en) 1997-02-14 2005-12-20 Denso Corporation Stick-type ignition coil having improved structure against crack or dielectric discharge
EP1380036B1 (de) * 2001-04-17 2007-10-10 Judd Wire, Inc. Mehrschichtiges isolationssystem für elektrische leiter
US6653379B2 (en) 2001-07-12 2003-11-25 3M Innovative Properties Company Fluoropolymers resistant to stress cracking
US20040256139A1 (en) 2003-06-19 2004-12-23 Clark William T. Electrical cable comprising geometrically optimized conductors
DE10331608A1 (de) * 2003-07-12 2005-01-27 Hew-Kabel/Cdt Gmbh & Co. Kg Verfahren zum Beschichten und/oder partiellen Umspritzen von flexiblem langgestrecktem Gut
WO2007037417A1 (ja) * 2005-09-30 2007-04-05 The Furukawa Electric Co., Ltd. 多層絶縁電線及びそれを用いた変圧器
JP2009093978A (ja) * 2007-10-11 2009-04-30 Mitsubishi Electric Corp コイル導線、誘導加熱用コイルおよび誘導加熱調理器

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US4184001A (en) * 1978-04-19 1980-01-15 Haveg Industries, Inc. Multi layer insulation system for conductors comprising a fluorinated copolymer layer which is radiation cross-linked
DE3170663D1 (en) * 1981-01-21 1985-07-04 Champlain Cable Corp Insulation system for wire and cable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7276664B2 (en) 1996-06-07 2007-10-02 Belden Technologies, Inc. Cable with dual layer jacket
CN102334167A (zh) * 2009-02-27 2012-01-25 泰科电子公司 具有交联外层的多层绝缘导体
CN102334168A (zh) * 2009-02-27 2012-01-25 泰科电子公司 具有交联的外层的多层绝缘导体

Also Published As

Publication number Publication date
DE3786429T2 (de) 1993-10-21
EP0258036A2 (de) 1988-03-02
EP0258036A3 (en) 1988-06-08
JPS6358709A (ja) 1988-03-14
DE3786429D1 (de) 1993-08-12

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