EP0024674A1 - Process for manufacturing insulated winding wires by extrusion of polyethylenterephtalate - Google Patents

Process for manufacturing insulated winding wires by extrusion of polyethylenterephtalate Download PDF

Info

Publication number
EP0024674A1
EP0024674A1 EP80104919A EP80104919A EP0024674A1 EP 0024674 A1 EP0024674 A1 EP 0024674A1 EP 80104919 A EP80104919 A EP 80104919A EP 80104919 A EP80104919 A EP 80104919A EP 0024674 A1 EP0024674 A1 EP 0024674A1
Authority
EP
European Patent Office
Prior art keywords
extrusion
titanium dioxide
weight
winding wires
insulated winding
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
EP80104919A
Other languages
German (de)
French (fr)
Other versions
EP0024674B1 (en
Inventor
Harald Dr. Janssen
Eberhard Kertscher
Hans-Georg Dr. Matthies
Rainer Dr. Theysohn
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.)
BASF Coatings GmbH
SI Group Inc
Original Assignee
Dr Beck & Co AG
Beck & Co AG Dr
Beck Dr and Co GmbH
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 Dr Beck & Co AG, Beck & Co AG Dr, Beck Dr and Co GmbH filed Critical Dr Beck & Co AG
Priority to AT80104919T priority Critical patent/ATE7433T1/en
Publication of EP0024674A1 publication Critical patent/EP0024674A1/en
Application granted granted Critical
Publication of EP0024674B1 publication Critical patent/EP0024674B1/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01B3/42—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 polyesters; polyethers; polyacetals
    • H01B3/421—Polyesters
    • 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
    • H01B13/148—Selection of the insulating material therefor
    • 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
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
    • Y10T428/2951—Metal with weld modifying or stabilizing coating [e.g., flux, slag, producer, etc.]
    • Y10T428/2953—Titanium compound in coating

Definitions

  • the present invention relates to an improved process for the production of insulated Vickel wires by extrusion of thermoplastics.
  • Enamel-insulated winding wires so-called “enamelled wires” are precisely characterized in the German standard DIN 46 435 from April 1977. They are used on a large scale in electrical engineering, transformer construction and electronics.
  • the conductor metal preferably copper or aluminum, is insulated with a thin, but mechanically and thermally extremely resistant synthetic resin lacquer layer.
  • Such enamelled wires are produced on wire enamelling machines by repeatedly applying an enamelled wire enamel to the metal wire.
  • wire enamel dispersions and aqueous solutions of wire enamel resins as well as resin melts are already used for wire enamelling.
  • thermoplastics for thick-walled sheathing of electrical conductor bundles and for the production of conductor wires has long been known from the cable industry.
  • thermoplastic polycondensates with crystallite melting points above 170 ° C., preferably above 250 ° C., are used as thermoplastics for the extrusion coating of Vickel wires.
  • the present invention relates to a process for the production of enamel-insulated winding wires by extrusion of partially crystalline thermoplastic polycondensates with crystallite melting points above 170 ° C., preferably above 250 ° C., which is characterized in that polyethylene terephthalate filled with 5-15% by weight of titanium dioxide is used.
  • wires coated with polyethylene terephthalate with a titanium dioxide content of 4% by weight and 5% by weight were still in order after an observation period of 10 days, with renewed assessment after a further 65 days, however, the coating showed slightly pronounced fine hairline cracks.
  • titanium dioxide From the above, there is therefore the need for a minimum addition of 5% by weight of titanium dioxide. From the standpoint of cracking, an upper limit on the titanium dioxide content is not apparent. However, since film homogeneities occur when the titanium dioxide content is too high. lead to a drop in the breakdown voltage, the titanium dioxide content should be max. 15% by weight can be limited.
  • Polyethylene terephthalate can be used for practically all types produced in the fiber and plastics industry from terephthalic acid or dimethyl terephthalate and ethylene glycol.
  • the titanium dioxide is expediently incorporated into polyethylene terephthalate on mixing extruders.
  • Polyethylene terephthalate (relative viscosity 1.33, K value according to Fikentscher 52, melting point according to DTA 255 ° C + ) with 8% titanium dioxide (anatase type, Kronos AV from Kronos Titan GmbH) was placed in the filler neck of one in the DT-OS 27 28 883 entered extruder described in detail.
  • the extruder temperatures from the inlet to the nozzle were 240 ° C / 250 ° C / 260 ° C / 270 ° C / 270 ° C / 270 ° C / 280 ° C at the individual temperature measuring points.
  • Soft-annealed copper wire with a diameter of 0.4 mm was used, which first passed a preheating section via a unwinding device and, after passing through the coating zone in the extruder head, a stripper nozzle which regulates the layer thickness.
  • the coated wire After passing through a cooling section, the coated wire was wound up; the take-off speed was 200 m / min.
  • the applied total layer thickness was 31 ⁇ and thus corresponded to grade 1 according to DIN 46 435 from April 1977.
  • the coating was smooth and showed no cracks - even after rewinding (observation period 210 days).
  • polyethylene terephthalate with 4% by weight, 5% by weight, 6% by weight, 7% by weight, 10% by weight and 15% by weight of titanium dioxide was used.
  • the insulated winding wires were produced under the same conditions as described above.

Landscapes

  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Insulating Materials (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Insulated Conductors (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Compounds Of Unknown Constitution (AREA)
  • Paints Or Removers (AREA)

Abstract

An extrusion process for the manufacture of insulated winding wires. Part crystalline thermoplastic polycondensates with crystallite melting points above 170 DEG C., preferably above 250 DEG C., are extruded. Polyethylene terephthalate is the polycondensate of choice. These are filled with 5-15% by weight titanium dioxide. The result is the avoidance of fissure formation.

Description

Die vorliegende Erfindung betrifft ein verbessertes Verfahren zur Herstellung von isolierten Vickeldrähten durch Extrusion von Thermoplasten.The present invention relates to an improved process for the production of insulated Vickel wires by extrusion of thermoplastics.

Lackisolierte Wickeldrähte, sogenannte "Lackdrähte", sind in der Deutschen Norm DIN 46 435 von April 1977 genau charakterisiert. Sie kommen in großem Umfang im Elektromaschinenbau, Transformatorenbau und in der Elektronik zum Einsatz.Enamel-insulated winding wires, so-called "enamelled wires", are precisely characterized in the German standard DIN 46 435 from April 1977. They are used on a large scale in electrical engineering, transformer construction and electronics.

Das Leitermetall, vorzugsweise Kupfer oder Aluminium, ist mit einer dünnen, jedoch mechanisch und thermisch äusserst widerstandsfähigen Kunstharzlackschicht isoliert.The conductor metal, preferably copper or aluminum, is insulated with a thin, but mechanically and thermally extremely resistant synthetic resin lacquer layer.

Die Herstellung derartiger Lackdrähte erfolgt auf Drahtlackiermaschinen durch mehrfaches kontinuierliches Auftragen eines Drahtlackes auf den Metalldraht. Im Hinblick auf die Schädlichkeit der in dem DraHtlack enthaltenen Lösungsmittel und auf die sich daraus ergebenden Umweltprobleme werden zur Drahtlackierung auch schon Drahtlack-Dispersionen und wässrige Lösungen von Drahtlackharzen sowie auch Harzschmelzen eingesetzt.Such enamelled wires are produced on wire enamelling machines by repeatedly applying an enamelled wire enamel to the metal wire. With regard to the harmfulness of the solvents contained in the wire enamel and the resulting environmental problems, wire enamel dispersions and aqueous solutions of wire enamel resins as well as resin melts are already used for wire enamelling.

Alle diese bekannten Verfahren sind durch die damit erreichbaren verhältnismäßig niedrigen Abzugsgeschwindigkeiten jedoch recht arbeits- und zeitaufwendig.However, all of these known methods are quite laborious and time-consuming due to the relatively low take-off speeds that can be achieved with them.

Aus der Kabelindustrie ist seit langem die Extrusion von Thermoplasten zur dickwandigen Ummantelung elektrischer Leiterbündel sowie zur Herstellung von Leitungsdrähten bekannt.The extrusion of thermoplastics for thick-walled sheathing of electrical conductor bundles and for the production of conductor wires has long been known from the cable industry.

In einer älteren Anmeldung (vergl. z.B. DT.OS 26 38 763) wird bereits ein Verfahren zur Herstellung von lackisolierten Wickeldrähten durch Extrusion von Thermoplasten beschrieben.In an older application (see e.g. DT.OS 26 38 763) a process for the production of enamelled wire by extrusion of thermoplastics is already described.

Diese unter Mitwirkung der Anmelderin getätigte. ältere Anmeldung leistet damit einen entscheidenden Beitrag zur Überwindung des Vorurteils, die Erzielung derart dünner Isolierschichten, wie sie laut DIN 46 435 gefordert werden, sei im Extrusionsverfahren nicht möglich. Nach DT-OS 26 38 763 werden als Thermoplaste für die Extrusionsbeschichtung von Vickeldrähten teilkristalline thermoplastische Polykondensate mit Kristallitschmelzpunkten oberhalb 170°C , vorzugsweise oberhalb 250°C, eingesetzt.This was done with the participation of the applicant. Older registrations thus make a decisive contribution to overcoming the prejudice that it is not possible to achieve such thin insulating layers as required by DIN 46 435 in the extrusion process. According to DT-OS 26 38 763, partially crystalline thermoplastic polycondensates with crystallite melting points above 170 ° C., preferably above 250 ° C., are used as thermoplastics for the extrusion coating of Vickel wires.

Nachteilig bei den teilkristallinen Polykondensaten gemäß DT-OS 26 38 763, insbesondere bei Polyäthylenterephthalat gemäss Beispiel 1 ist - wie erst neuerdings festgestellt wurde - die Neigung der Thermoplastbeschichtung zur Rissbildung.A disadvantage of the partially crystalline polycondensates in accordance with DT-OS 26 38 763, in particular in the case of polyethylene terephthalate in accordance with Example 1, is - as has only recently been established - the tendency of the thermoplastic coating to crack.

Nach einer Lagerzeit von wenigen Tagen bis zu mehreren Wochen bilden sich vorzugsweise nach dem Umspulen der beschichteten Drähte oberflächlich feine, konzentrisch verlaufende Risse aus, die offenbar auf nachträgliche Kristallisations- und damit Schrumpfungsprozesse des Polymeren zurückzuführen sind.After a storage period of a few days to several weeks, preferably after rewinding coated wires on the surface of fine, concentric cracks, which are apparently due to subsequent crystallization and thus shrinkage processes of the polymer.

Es liegt auf der Hand, daß diese Risse, auch wenn sie nicht bis auf die Metalloberfläche durchgehen, eine gewisse Beeinträchtigung einiger Eigenschaften der Wickeldrähte darstellen.It is obvious that these cracks, even if they do not go through to the metal surface, represent a certain impairment of some properties of the winding wires.

Es wurde nun überraschenderweise ein verbessertes Verfahren zur Herstellung von Wickeldrähten durch Extrusion von Thermoplasten gefunden, das die geschilderten Nachteile überwindet.Surprisingly, an improved process for the production of winding wires by extrusion of thermoplastics has now been found, which overcomes the disadvantages described.

Gegenstand der vorliegenden Erfindung ist ein Verfahren zur Herstellung von lackisolierten Wickeldrähten durch Extrusion von teilkristallinen thermoplastischen Polykondensaten mit Kristallitschmelzpunkten oberhalb 170°C, vorzugsweise oberhalb 250°C, das dadurch gekennzeichnet ist, daß mit 5 - 15 Gew.% Titandioxid gefülltes Polyäthylenterephthalat eingesetzt wird.The present invention relates to a process for the production of enamel-insulated winding wires by extrusion of partially crystalline thermoplastic polycondensates with crystallite melting points above 170 ° C., preferably above 250 ° C., which is characterized in that polyethylene terephthalate filled with 5-15% by weight of titanium dioxide is used.

Es konnte in keiner Weise vorausgesehen werden, daß durch Einarbeitung von Titandioxid in Polyäthylenterephthalat die Tendenz der damit beschichteten Drähte zur Rissbildung merklich verringert und mit Titandioxidgehalten oberhalb von 5 Gew.% über einen längeren Beobachtungszeitraum völlig verhindert wird.In no way could it have been foreseen that incorporation of titanium dioxide into polyethylene terephthalate would noticeably reduce the tendency of the wires coated with it to crack and prevent it with titanium dioxide contents above 5% by weight over a longer observation period.

Dieser Befund ist umso überraschender, da andere Zusätze, wie z.B. Talkum, Kaolin, Bariumsulfat, keinen diesbezüglichen Effekt erkennen liessen.This finding is all the more surprising since other additives, e.g. Talc, kaolin, barium sulfate, showed no related effect.

So waren beispielsweise mit Polyäthylenterephthalat beschichtete Drähte mit einem Titandioxid-Gehalt von 4 Gew.% und 5 Gew.% nach einem Beobachtungszeitraum von 10 Tagen noch in Ordnung, bei erneuter Begutachtung nach weiteren 65 Tagen zeigte die Beschichtung jedoch schwach ausgeprägte feine Haarrisse.For example, wires coated with polyethylene terephthalate with a titanium dioxide content of 4% by weight and 5% by weight were still in order after an observation period of 10 days, with renewed assessment after a further 65 days, however, the coating showed slightly pronounced fine hairline cracks.

Mit 6 Gew.% und 7 Gew.% Titandioxid war die Beschichtung im gleichen Beobachtungszeitraum noch völlig in Ordnung, mit 8 Gew.%, 10 Gew.%, 15. Gew.% und 30 Gew.% Titantioxid darüber hinaus auch nach einem Beobachtungszeitraum von über 200 Tagen.With 6% by weight and 7% by weight titanium dioxide, the coating was still completely in order in the same observation period, with 8% by weight, 10% by weight, 15% by weight and 30% by weight titanium dioxide even after an observation period of over 200 days.

Aus dem Vorgenannten ergibt sich also die Notwendigkeit eines Mindestzusatzes von 5 Gew.% Titandioxid. Vom Standpunkt der Rissbildung aus gesehen ist eine obere Grenze des Titandioxid-Gehaltes nicht ersichtlich. Da jedoch bei zu hohen Titandioxid-Gehalten Filminhomogenitäten auftreten, die u.a. zum Abfall der Durchschlagspannung führen, sollte der Titandioxid-Gehalt auf max. 15 Gew.% begrenzt werden.From the above, there is therefore the need for a minimum addition of 5% by weight of titanium dioxide. From the standpoint of cracking, an upper limit on the titanium dioxide content is not apparent. However, since film homogeneities occur when the titanium dioxide content is too high. lead to a drop in the breakdown voltage, the titanium dioxide content should be max. 15% by weight can be limited.

Als Polyäthylenterephthalat können praktisch alle in der Faser- und Kunststoffindustrie üblichen aus Terephthalsäure bzw. Dimethylterephthalat und Äthylenglykol hergestellten Typen Verwendung finden. Weiterhin kommen als Titandioxid die handelsüblichen Rutil-und Anatas-Typen, wie sie zur Einfärbung von Kunststoffen und Lacken verwendet werden, zum Einsatz.Polyethylene terephthalate can be used for practically all types produced in the fiber and plastics industry from terephthalic acid or dimethyl terephthalate and ethylene glycol. The commercially available rutile and anatase types, such as are used for coloring plastics and paints, are also used as titanium dioxide.

Die Einarbeitung des Titandioxids in Polyäthylenterephthalat erfolgt zweckmässigerweise auf Mischextrudern.The titanium dioxide is expediently incorporated into polyethylene terephthalate on mixing extruders.

Beispiel:Example:

Polyäthylenterephthalat (relative Viskosität 1,33, K-Wert nach Fikentscher 52, Schmelzpunkt nach DTA 255°C +) mit 8 % Titandioxid (Anatas-Typ, Kronos AV der Firma Kronos Titan GmbH) wurde in den Einfüllstutzen eines in der DT-OS 27 28 883 im Detail beschriebenen Extruders eingegeben.Polyethylene terephthalate (relative viscosity 1.33, K value according to Fikentscher 52, melting point according to DTA 255 ° C + ) with 8% titanium dioxide (anatase type, Kronos AV from Kronos Titan GmbH) was placed in the filler neck of one in the DT-OS 27 28 883 entered extruder described in detail.

Die Extrudertemperaturen vom Einlauf bis zur Düse betrugen an den einzelnen Temperaturmeßstellen 240°C/ 250°C/ 260°C/ 270°C/ 270°C/ 270°C/ 280°C.The extruder temperatures from the inlet to the nozzle were 240 ° C / 250 ° C / 260 ° C / 270 ° C / 270 ° C / 270 ° C / 280 ° C at the individual temperature measuring points.

Zum Einsatz gelangte weichgeglühter Kupferdraht von 0,4 mm Durchmesser, der über eine Abspulvorrichtung zunächst eine Vorheizstrecke und nach Passieren der Beschichtungszone im Extruderkopf eine Abstreiferdüse, die die Schichtdicke reguliert, durchlief.Soft-annealed copper wire with a diameter of 0.4 mm was used, which first passed a preheating section via a unwinding device and, after passing through the coating zone in the extruder head, a stripper nozzle which regulates the layer thickness.

Nach Passieren einer Kühlstrecke wurde der beschichtete Draht aufgespult; die Abzugsgeschwindigkeit betrug 200 m/min. Die aufgetragene Gesamtschichtdicke betrug 31 µ und entsprach somit Grad 1 nach DIN 46 435 vom April 1977.After passing through a cooling section, the coated wire was wound up; the take-off speed was 200 m / min. The applied total layer thickness was 31 µ and thus corresponded to grade 1 according to DIN 46 435 from April 1977.

+ Bestimmung der relativen Viskosität einer Lösung des Polyäthylenterephthalats (0,5 g) in 100 ml eines Lösungsmittels bestehend aus 3 Teilen Phenol und 2 Teilen o-Dichlorbenzol bei 25°C mit Hilfe eines Ubbelohde Viskosimeters Ia. Der sogenannte K-Vert wird nach Fikentscher aus der relativen Viskosität berechnet. + Determine the relative viscosity of a solution of polyethylene terephthalate (0.5 g) in 100 ml of a solvent consisting of 3 parts phenol and 2 parts o-dichlorobenzene at 25 ° C using an Ubbelohde viscometer Ia. The so-called K-Vert is calculated according to Fikentscher from the relative viscosity.

Eigenschaften des Wickeldrahtes:Characteristics of the winding wire:

Sofern nicht anders vermerkt alle Werte gemäss DIN 46 453, Blatt 1, von April 1977.

Figure imgb0001
Unless otherwise noted, all values according to DIN 46 453, sheet 1, from April 1977.
Figure imgb0001

Die Beschichtung war glatt und wies - auch nach erfolgtem Umspulen - keine Risse auf (Beobachtungszeitraum 210 Tage).The coating was smooth and showed no cracks - even after rewinding (observation period 210 days).

In weiteren Versuchen kam Polyäthylenterephthalat mit 4 Gew.%, 5 Gew.%, 6 Gew.%, 7 Gew.%, 10 Gew.% und 15 Gew.% Titandioxid zum Einsatz.In further experiments, polyethylene terephthalate with 4% by weight, 5% by weight, 6% by weight, 7% by weight, 10% by weight and 15% by weight of titanium dioxide was used.

Die Herstellung der isolierten Wickeldrähte erfolgte unter den gleichen Bedingungen wie oben beschrieben.The insulated winding wires were produced under the same conditions as described above.

Die Abhängigkeit der Rissbildungstendenz vom Titandioxid-Gehalt ist aus der Textbeschreibung zu entnehmen.The dependence of the crack formation tendency on the titanium dioxide content can be seen from the text description.

Claims (1)

Verfahren zur Herstellung von lackisolierten Wickeldrähten durch Extrusion von teilkristallinen thermoplastischen Polykondensaten mit Kristallitschmelzpunkten oberhalb 170°C, vorzugsweise oberhalb 250°C, dadurch gekennzeichnet, dass mit 5 - 15 Gew.% Titandioxid gefüllte Poly- äthylenterephthalate eingesetzt werden.Process for the production of enamel-insulated winding wires by extrusion of partially crystalline thermoplastic polycondensates with crystallite melting points above 170 ° C., preferably above 250 ° C., characterized in that polyethylene terephthalates filled with 5-15% by weight titanium dioxide are used.
EP80104919A 1979-09-01 1980-08-19 Process for manufacturing insulated winding wires by extrusion of polyethylenterephtalate Expired EP0024674B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80104919T ATE7433T1 (en) 1979-09-01 1980-08-19 PROCESS FOR MANUFACTURING INSULATED WINDING WIRE BY EXTRUDING ON POLYETHYLENE TEREPHTALATE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2935458 1979-09-01
DE2935458A DE2935458C2 (en) 1979-09-01 1979-09-01 Process for the production of insulated winding wires by extrusion of thermoplastics

Publications (2)

Publication Number Publication Date
EP0024674A1 true EP0024674A1 (en) 1981-03-11
EP0024674B1 EP0024674B1 (en) 1984-05-09

Family

ID=6079879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104919A Expired EP0024674B1 (en) 1979-09-01 1980-08-19 Process for manufacturing insulated winding wires by extrusion of polyethylenterephtalate

Country Status (11)

Country Link
US (1) US4406851A (en)
EP (1) EP0024674B1 (en)
JP (1) JPS596012B2 (en)
AT (1) ATE7433T1 (en)
AU (1) AU535473B2 (en)
BR (1) BR8005518A (en)
CA (1) CA1140311A (en)
DE (2) DE2935458C2 (en)
DK (1) DK369380A (en)
FI (1) FI802509A (en)
IN (1) IN154556B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013020953A1 (en) 2011-08-09 2013-02-14 Elantas Gmbh Solvent-free wire enamel composition

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4606870A (en) * 1984-07-25 1986-08-19 Essex Group, Inc. Preparing magnet wire having electron beam curable wire enamels
US4588546A (en) * 1984-08-27 1986-05-13 The Goodyear Tire & Rubber Company Wire coating process
KR100627509B1 (en) * 2005-05-24 2006-09-22 엘에스전선 주식회사 Polyester resin composition for covering material of cable and cable using the same
CN100481275C (en) * 2007-01-24 2009-04-22 兴宁市金雁电工有限公司 Production of C-level polyurethane enamelled wire

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2360097A (en) * 1940-03-21 1944-10-10 Du Pont Apparatus for manufacture of coated products
AT286639B (en) * 1967-12-09 1970-12-10 Hoechst Ag Thermoplastic polyester molding compound containing titanium dioxide
GB1328019A (en) * 1970-07-10 1973-08-22 Akzo Nv Process for the preparation of polyethylene terephthalate polymers which incorporate inorganic fillers therein
DE2719429A1 (en) * 1977-04-30 1978-11-02 Bayer Ag Opaque white pigmented poly:alkylene terephthalate compsn. - with high reflectivity, esp. for reflectors
CH612789A5 (en) * 1976-07-01 1979-08-15 Maillefer Sa
EP0012224A1 (en) * 1978-11-13 1980-06-25 L. Givaudan & Cie Société Anonyme Process for the synthesis of fragrant mixtures

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB599097A (en) * 1945-09-13 1948-03-04 Alan Ashby Drummond Improvements in or relating to electrical insulation
GB610370A (en) * 1946-04-01 1948-10-14 Skefko Ball Bearing Company Lt Improvements in or relating to filament-spinning spindle mountings
US2889304A (en) * 1957-03-07 1959-06-02 Schenectady Varnish Company In Polyester resin, method of preparing same and electrical conductor coated therewith
US3287489A (en) * 1964-09-08 1966-11-22 Kerite Company Insulated high voltage cables
US3893642A (en) * 1970-01-29 1975-07-08 Bekaert Sa Nv Polyethylene terephthalate plastic coated wire
CH616264A5 (en) * 1976-07-01 1980-03-14 Maillefer Sa
DE2753917A1 (en) * 1977-12-03 1979-06-07 Beck & Co Ag Dr USE OF THERMOPLASTICS FOR THE MANUFACTURE OF INSULATED WINDING WIRES IN THE EXTRUSION PROCESS

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2360097A (en) * 1940-03-21 1944-10-10 Du Pont Apparatus for manufacture of coated products
AT286639B (en) * 1967-12-09 1970-12-10 Hoechst Ag Thermoplastic polyester molding compound containing titanium dioxide
GB1328019A (en) * 1970-07-10 1973-08-22 Akzo Nv Process for the preparation of polyethylene terephthalate polymers which incorporate inorganic fillers therein
CH612789A5 (en) * 1976-07-01 1979-08-15 Maillefer Sa
DE2719429A1 (en) * 1977-04-30 1978-11-02 Bayer Ag Opaque white pigmented poly:alkylene terephthalate compsn. - with high reflectivity, esp. for reflectors
EP0012224A1 (en) * 1978-11-13 1980-06-25 L. Givaudan & Cie Société Anonyme Process for the synthesis of fragrant mixtures

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013020953A1 (en) 2011-08-09 2013-02-14 Elantas Gmbh Solvent-free wire enamel composition
DE102011052518A1 (en) 2011-08-09 2013-02-14 Elantas Gmbh Solvent-free wire enamel composition
US10501656B2 (en) 2011-08-09 2019-12-10 Elantas Gmbh Solvent-free wire enamel composition

Also Published As

Publication number Publication date
JPS5673817A (en) 1981-06-18
DE2935458C2 (en) 1983-01-20
US4406851A (en) 1983-09-27
ATE7433T1 (en) 1984-05-15
FI802509A (en) 1981-03-02
BR8005518A (en) 1981-05-12
AU6144280A (en) 1981-03-05
DE3067759D1 (en) 1984-06-14
EP0024674B1 (en) 1984-05-09
JPS596012B2 (en) 1984-02-08
CA1140311A (en) 1983-02-01
AU535473B2 (en) 1984-03-22
DK369380A (en) 1981-03-02
DE2935458A1 (en) 1981-03-19
IN154556B (en) 1984-11-10

Similar Documents

Publication Publication Date Title
EP0165207B1 (en) Powder paintings for flatted coatings
DE2558544C2 (en)
DE3786429T2 (en) Insulated cable with high-temperature resistant multi-layer insulation.
DE2104271C3 (en) Process for the continuous sheathing of steel wire
AT213987B (en) Process for the production of enamel wire
EP0002224B1 (en) Process for manufacturing insulated binding wires by extrusion of thermoplasts and thermoplasts for carrying out this process
EP0024674B1 (en) Process for manufacturing insulated winding wires by extrusion of polyethylenterephtalate
EP0030717B1 (en) Method of producing winding wires by extrusion of thermoplastics
DE69509491T2 (en) Self-extinguishing cable with low toxic and corrosive smoke and gas emission, and process for its production
DE2915155C2 (en)
EP0025538B1 (en) Process for producing insulated winding wire by extrusion of thermoplasts
DE1669622A1 (en) Process for the production of electrical conductors sheathed by extrusion with an insulation sleeve made of polyethylene glycol terephthalate
DE1513783B2 (en) GROOVE LINING FOR DYNAMOELECTRIC MACHINERY
DE1956409C3 (en) Polyesterimide based wire coating solution
EP0017062A1 (en) Use of amorphous polethersulfones in the extrusion-process manufacture of insulated copper winding wires
DE2032075B2 (en) Multilayer insulation materials
DE808599C (en) Electrical conductor with an insulating means
DE2409655B2 (en) METHOD OF DRESSING ELECTRIC LADDERS MADE OF ALUMINUM
DE903102C (en) Insulated electrical line
DE1947030C (en) Insulated electrical component
DE1269269B (en) Polyimide-based wire enamel
DE1765848B1 (en) IMPRAEGNATING COMPOUND FOR INSULATING PURPOSES
DE1065118B (en) Wire enamels intended for electrical insulation
DE747694C (en) Process for producing airspace-insulated coaxial cables
DE1513783C (en) Groove lining for dynamo-electric machines

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 FR GB IT NL SE

17P Request for examination filed

Effective date: 19810904

ITF It: translation for a ep patent filed

Owner name: CALVANI SALVI E VERONELLI S.R.L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

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

REF Corresponds to:

Ref document number: 7433

Country of ref document: AT

Date of ref document: 19840515

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3067759

Country of ref document: DE

Date of ref document: 19840614

ET Fr: translation filed
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
EAL Se: european patent in force in sweden

Ref document number: 80104919.8

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

Ref country code: GB

Payment date: 19990726

Year of fee payment: 20

NLS Nl: assignments of ep-patents

Owner name: SCHENECTADY INTERNATIONAL, INC.

NLT1 Nl: modifications of names registered in virtue of documents presented to the patent office pursuant to art. 16 a, paragraph 1

Owner name: BASF PROJEKTENTWICKLUNGS AKTIENGESELLSCHAFT

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

Ref country code: FR

Ref legal event code: CD

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

Ref country code: BE

Payment date: 19990817

Year of fee payment: 20

Ref country code: AT

Payment date: 19990817

Year of fee payment: 20

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

Ref country code: NL

Payment date: 19990819

Year of fee payment: 20

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

Ref country code: SE

Payment date: 19990820

Year of fee payment: 20

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

Ref country code: FR

Payment date: 19990826

Year of fee payment: 20

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

Ref country code: DE

Payment date: 19990907

Year of fee payment: 20

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

Ref country code: CH

Payment date: 19990908

Year of fee payment: 20

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: BASF PROJEKTENTWICKLUNGS-AKTIENGESELLSCHAFT -DANN

Ref country code: CH

Ref legal event code: PFA

Free format text: DR. BECK & CO. AG TRANSFER- BASF PROJEKTENTWICKLUNGS-AKTIENGESELLSCHAFT

BE20 Be: patent expired

Free format text: 20000819 *SCHENECTADY INTERNATIONAL INC.

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

Ref country code: LI

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20000818

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20000818

Ref country code: CH

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20000818

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

Ref country code: NL

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20000819

Ref country code: AT

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20000819

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

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 20000830

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Effective date: 20000818

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV7 Nl: ceased due to reaching the maximum lifetime of a patent

Effective date: 20000819

EUG Se: european patent has lapsed

Ref document number: 80104919.8

BECA Be: change of holder's address

Free format text: 20000119 *SCHENECTADY INTERNATIONAL INC.:2750 BALLTOWN ROAD, SCHENECTADY NEW YORK 12309

BECH Be: change of holder

Free format text: 20000119 *SCHENECTADY INTERNATIONAL INC.