EP0360755A1 - Conducteurs électriques simples ou multiples isolés et leur procédé de fabrication - Google Patents

Conducteurs électriques simples ou multiples isolés et leur procédé de fabrication Download PDF

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Publication number
EP0360755A1
EP0360755A1 EP89810695A EP89810695A EP0360755A1 EP 0360755 A1 EP0360755 A1 EP 0360755A1 EP 89810695 A EP89810695 A EP 89810695A EP 89810695 A EP89810695 A EP 89810695A EP 0360755 A1 EP0360755 A1 EP 0360755A1
Authority
EP
European Patent Office
Prior art keywords
layer
heat
insulation layer
protective layer
flame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89810695A
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German (de)
English (en)
Other versions
EP0360755B1 (fr
Inventor
Michael Schurr
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.)
Huber and Suhner AG
Original Assignee
Huber and Suhner AG
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
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Application filed by Huber and Suhner AG filed Critical Huber and Suhner AG
Publication of EP0360755A1 publication Critical patent/EP0360755A1/fr
Application granted granted Critical
Publication of EP0360755B1 publication Critical patent/EP0360755B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
    • 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

  • the invention relates to single and multi-core insulated, electrical lines, in particular those with an extruded, cross-linked, heat-resistant, flame-retardant insulation or such a protective jacket and an outer protective layer, preferably applied in the electrostatic powder coating process, to improve the resistance to liquid media and mechanical stresses.
  • CH Patent 664,230 describes an insulated electrical cable whose inner insulation consists of halogen-free, crosslinked polyolefin copolymer and whose outer protective layer consists of a polyamide or a thermoplastic halogen-free polyester elastomer or a halogen-free aromatic polyether.
  • This outer protective layer is applied in the extrusion process. There is no intimate connection of the inner insulation layer with the outer protective layer. This leads to wrinkling of the protective layer when the finished Cable is bent around small bending radii, especially for cable diameters larger than 5 mm.
  • the aim of the invention is to eliminate the disadvantages of the known double-layer extruded insulation, namely the lack of adhesion between the inner and outer insulation layer and the formation of folds in the outer layer when bent around sharp edges.
  • This is achieved by fusing the two layers together, for example by applying the outer layer in an electrostatic powder coating process and immediately afterwards by the action of heat, for example in a continuous furnace.
  • This creates an intimate connection between the outer protective layer and the inner insulation layer, which can only be removed by destroying one of the two layers.
  • the protective layer thickness is generally 0.05 to 0.2 mm.
  • the electrostatic powder coating process has so far been used for coating bare metal parts, among other things also for coating metal wires as corrosion protection.
  • the powder layer is melted or hardened by the inherent heat stored in the workpiece by preheating before coating or by reheating the powder-coated workpiece. Depending on the composition of the powder, the melting or hardening temperatures are between 100 and 300 ° C.
  • This invention relates to a line as defined in claims 1 to 8.
  • the single and multi-core electrical cables consist of plastic-insulated metallic conductors.
  • Another object of the invention is a method for their production by the powder coating method as defined in claim 9.
  • Coating already insulated metallic conductors using the electrostatic powder coating process places high demands on the insulating material with regard to heat and dimensional stability. This must withstand temperatures between 100 and 300 ° C for a short time without impairing the mechanical and electrical properties. Thermoplastic insulating materials are not suitable for this process.
  • the preferred insulating materials for the inner insulation layer are radiation-crosslinked plastics made of heat-resistant polyolefin copolymer, for example "Radox” 125 and “Radox” 155.
  • the permanent temperature resistance (20,000 h) is 120 ° C and the short-term temperature resistance (5 to 10 s) 260 ° C.
  • the short-term temperature resistance (2.5 to 10 s) 260 ° C.
  • Radox these values are 135 ° C and 280 ° C
  • Radox is the registered trademark of Huber & Suhner AG.
  • Insulation layers made of such materials have hitherto been applied to the metallic conductor using the extrusion process.
  • insulation layers made of heat-resistant, organic or inorganic materials e.g. with mica coated glass fabric, apply as tapes to the metallic conductors using the winding process and then cover with a protective layer using the electrostatic powder coating process.
  • the following materials have proven to be particularly suitable as plastics for the formation of a protective layer in the sense of the invention: - Polyamide 6.6, ie polyhexamethylene adipamide - Polyamide 11, ie polyundecanamide Polyamide 12, ie polylaurin lactam - polyurethane - polyvinylidene fluoride - Polyethyl ketone - epoxy resins - polyester resins.
  • the inner insulation layer is generally applied in a layer thickness of 0.2 to 3 mm, while the outer layer is applied relatively thin in a thickness of preferably 0.05 to 0.15 mm.
  • a powder layer of polyamide 11 (for example "Rilsan B” supplier Atochem) was applied to the electrical line thus obtained using the electrostatic coating process. applied and this layer immediately melted on the inner insulation layer by exposure to temperature of approx. 200 ° C for 5 to 10 seconds. The outside diameter of the line insulated in this way was 3.7 mm.
  • the obtained double-layer insulated line was stored in mineral oil of type ASTM No. 2 at a temperature of 100 ° C. for 72 hours and in diesel oil at a temperature of 70 ° C. for 168 hours.
  • the line was then subjected to a winding test around a metal mandrel, the diameter of which was three times the line diameter, without the samples showing any change.
  • Multi-core cable jacket made of "Radox” 125, coated with PA11.
  • the flexibility of the coated cable differed only slightly from the uncoated cable when testing was carried out according to the German standard VG 95218, part 2.
  • the abrasion test as described in Example 1, showed an abrasion depth of 0.2 mm after 500 strokes compared to 0.5 mm for the line not coated with PA11.
  • a copper strand made of fifty individual wires with a diameter of 0.25 mm and a total cross section of 2.5 mm2 and a diameter of 2.1 mm was extruded in a known manner with an inner insulation layer made of "Radox" 155 copolymer filled with a halogen-containing flame retardant system (" Radox "155 is the name of Huber & Suhner AG.
  • Radox "155 is the name of Huber & Suhner AG.
  • the insulation layer was then exposed to high-energy electron beams at a dose of 5 to 20 Mrad.
  • a powder layer of polyvinylidene fluoride (for example "Kynar", supplier Pennwalt Corporation) was applied to the electrical line obtained in this way by electrostatic coating and this layer was then immediately melted onto the inner layer by the action of temperature of 280 ° C. for 5 to 10 seconds.
  • the outside diameter of the line was 3.7 mm.
  • the double-layer insulated line was stored in mineral and diesel oil without impairing the properties.
  • the abrasion test as described in Example 1, showed an abrasion depth of 0.2 mm compared to 0.5 mm after one thousand strokes for the line not coated with PVDF.
  • a nickel-plated copper strand consisting of seven individual wires of 0.673 mm and a total cross section of 2.5 mm2 was coated with 0.1 mm thick with mica glass cloth tapes and wrapped with 2 mm overlap.
  • the cable diameter was 2.4 mm.
  • a powder layer made of polyethylene ketone PEEK (supplied by ICI) was applied to the line obtained in this way by electrostatic coating and this layer was then immediately melted onto the glass fabric winding by the action of temperature of 340 ° C.
  • the outside diameter of the line was 2.8 mm.
  • the coated line met the test requirements of the following specifications: - Media resistance according to MIL-W-22759 - Water resistance according to ICEA-S-68 - Flame retardancy according to IEC 332-1 or UL 1581 VW1.

Landscapes

  • Insulated Conductors (AREA)
  • Organic Insulating Materials (AREA)
  • Communication Cables (AREA)
  • Electroluminescent Light Sources (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Adornments (AREA)
EP89810695A 1988-09-23 1989-09-15 Conducteurs électriques simples ou multiples isolés et leur procédé de fabrication Revoked EP0360755B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3559/88A CH677845A5 (fr) 1988-09-23 1988-09-23
CH3559/88 1988-09-23

Publications (2)

Publication Number Publication Date
EP0360755A1 true EP0360755A1 (fr) 1990-03-28
EP0360755B1 EP0360755B1 (fr) 1994-05-18

Family

ID=4258604

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810695A Revoked EP0360755B1 (fr) 1988-09-23 1989-09-15 Conducteurs électriques simples ou multiples isolés et leur procédé de fabrication

Country Status (6)

Country Link
EP (1) EP0360755B1 (fr)
AT (1) ATE105967T1 (fr)
CH (1) CH677845A5 (fr)
DE (1) DE58907682D1 (fr)
FI (1) FI894155A (fr)
NO (1) NO893687L (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0440118A2 (fr) * 1990-01-31 1991-08-07 Fujikura Ltd. Fil électrique isolé et câble l'utilisant
WO1999031676A1 (fr) * 1997-12-18 1999-06-24 Rockbestos-Surprenant Cable Corp. Composition isolante multi-couche pour hautes tensions

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2310619A1 (fr) * 1975-05-05 1976-12-03 Northern Telecom Ltd Procede de fabrication d'un conducteur electrique isole thermiquement et revetu de polymere et conducteur ainsi obtenu

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH664230A5 (de) * 1984-02-08 1988-02-15 Huber+Suhner Ag Isolierte, elektrische leitung.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2310619A1 (fr) * 1975-05-05 1976-12-03 Northern Telecom Ltd Procede de fabrication d'un conducteur electrique isole thermiquement et revetu de polymere et conducteur ainsi obtenu

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0440118A2 (fr) * 1990-01-31 1991-08-07 Fujikura Ltd. Fil électrique isolé et câble l'utilisant
EP0440118A3 (en) * 1990-01-31 1992-02-26 Fujikura Ltd. Electric insulated wire and cable using the same
WO1999031676A1 (fr) * 1997-12-18 1999-06-24 Rockbestos-Surprenant Cable Corp. Composition isolante multi-couche pour hautes tensions
US6207277B1 (en) 1997-12-18 2001-03-27 Rockbestos-Surprenant Cable Corp. Multiple insulating layer high voltage wire insulation

Also Published As

Publication number Publication date
CH677845A5 (fr) 1991-06-28
FI894155A (fi) 1990-03-24
NO893687L (no) 1990-03-26
ATE105967T1 (de) 1994-06-15
EP0360755B1 (fr) 1994-05-18
FI894155A0 (fi) 1989-09-04
DE58907682D1 (de) 1994-06-23
NO893687D0 (no) 1989-09-15

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