EP0024674B1 - Verfahren zur Herstellung isolierter Wickeldrähte durch Aufextrudieren von Polyethylenterephtalat - Google Patents

Verfahren zur Herstellung isolierter Wickeldrähte durch Aufextrudieren von Polyethylenterephtalat Download PDF

Info

Publication number
EP0024674B1
EP0024674B1 EP80104919A EP80104919A EP0024674B1 EP 0024674 B1 EP0024674 B1 EP 0024674B1 EP 80104919 A EP80104919 A EP 80104919A EP 80104919 A EP80104919 A EP 80104919A EP 0024674 B1 EP0024674 B1 EP 0024674B1
Authority
EP
European Patent Office
Prior art keywords
titanium dioxide
weight
winding wires
extrusion
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.)
Expired
Application number
EP80104919A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0024674A1 (de
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 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 Dr and Co GmbH filed Critical Dr Beck & Co AG
Priority to AT80104919T priority Critical patent/ATE7433T1/de
Publication of EP0024674A1 publication Critical patent/EP0024674A1/de
Application granted granted Critical
Publication of EP0024674B1 publication Critical patent/EP0024674B1/de
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 method for producing insulated winding 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 to a large extent 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.
  • DE-OS 2 638 763 discloses a process for the production of enameled winding wires by extrusion of partially crystalline thermoplastic polycondensates with crystallite melting points above 170 ° C., preferably above 250 ° C.
  • fine, concentric cracks preferably form on the surface after rewinding the coated wires, which are apparently due to subsequent crystallization and thus shrinkage processes of the polymer.
  • the object of the invention was to improve the extrusion of thermoplastics for the production of winding wires so that cracking no longer occurs.
  • This object was achieved by a process for producing insulated winding wires by extruding polyethylene terephthalate, which is characterized in that polyethylene terephthalates filled with 5 to 15% by weight of titanium dioxide are 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, but when re-examined after a further 65 days the coating showed weakly 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 and lead, among other things, to a drop in the breakdown voltage, the titanium dioxide content should be limited to 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 commercially available rutile and anatase types such as those used for coloring plastics and paints, are also used as titanium dioxide.
  • 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) Determination of 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 with the help of an Ubbelohde viscometer la.
  • K-value is calculated according to Fikentscher from the relative viscosity) with 8% titanium dioxide (anatase type, Kronos AV from Kronos Titan GmbH) was placed in a filler neck in the DT-OS 2 728 883 entered extruder described in detail.
  • the extruder temperatures from the inlet to the Nozzles at the individual temperature measuring points were 240 ° C / 250 ° C / 260 ° C / 270 ° C / 270 ° C / 270 ° C / 280 ° C.
  • 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. 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 ⁇ m and thus corresponded to grade 1 according to DIN 46435 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

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Organic Insulating Materials (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Insulated Conductors (AREA)
  • Paints Or Removers (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Compounds Of Unknown Constitution (AREA)
EP80104919A 1979-09-01 1980-08-19 Verfahren zur Herstellung isolierter Wickeldrähte durch Aufextrudieren von Polyethylenterephtalat Expired EP0024674B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80104919T ATE7433T1 (de) 1979-09-01 1980-08-19 Verfahren zur herstellung isolierter wickeldraehte durch aufextrudieren von polyethylenterephtalat.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2935458A DE2935458C2 (de) 1979-09-01 1979-09-01 Verfahren zur Herstellung isolierter Wickeldrähte durch Extrusion von Thermoplasten
DE2935458 1979-09-01

Publications (2)

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

Family

ID=6079879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104919A Expired EP0024674B1 (de) 1979-09-01 1980-08-19 Verfahren zur Herstellung isolierter Wickeldrähte durch Aufextrudieren von Polyethylenterephtalat

Country Status (11)

Country Link
US (1) US4406851A (en:Method)
EP (1) EP0024674B1 (en:Method)
JP (1) JPS596012B2 (en:Method)
AT (1) ATE7433T1 (en:Method)
AU (1) AU535473B2 (en:Method)
BR (1) BR8005518A (en:Method)
CA (1) CA1140311A (en:Method)
DE (2) DE2935458C2 (en:Method)
DK (1) DK369380A (en:Method)
FI (1) FI802509A7 (en:Method)
IN (1) IN154556B (en:Method)

Families Citing this family (5)

* 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 (ko) * 2005-05-24 2006-09-22 엘에스전선 주식회사 전선 피복재료용 폴리에스테르계 수지 조성물 및 이를이용한 전선
CN100481275C (zh) * 2007-01-24 2009-04-22 兴宁市金雁电工有限公司 C级聚氨酯漆包线的生产方法
DE102011052518A1 (de) 2011-08-09 2013-02-14 Elantas Gmbh Lösemittelfreie Drahtlackzusammensetzung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002224A1 (de) * 1977-12-03 1979-06-13 Dr. Beck & Co. AG Verfahren zur Herstellung von isolierten Wickeldrähten durch Extrusion von Thermoplasten und Thermoplaste zur Ausführung desselben

Family Cites Families (12)

* 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
US2360097A (en) * 1940-03-21 1944-10-10 Du Pont Apparatus for manufacture of coated products
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
DE1694232A1 (de) * 1967-12-09 1971-07-22 Hoechst Ag Titandioxydhaltige thermoplastische Polyesterformmassen
US3893642A (en) * 1970-01-29 1975-07-08 Bekaert Sa Nv Polyethylene terephthalate plastic coated wire
NL7010296A (en:Method) * 1970-07-10 1972-01-12
CH616264A5 (en:Method) * 1976-07-01 1980-03-14 Maillefer Sa
CH612789A5 (en:Method) * 1976-07-01 1979-08-15 Maillefer Sa
DE2719429C2 (de) * 1977-04-30 1984-08-16 Bayer Ag, 5090 Leverkusen Verwendung lichtdichter Polyalkylenterephthalatmassen mit hohem Reflexionsvermögen zur Herstellung von LED-Elementen, Lichtbausteinen und Reflektoren
US4266087A (en) * 1978-11-13 1981-05-05 Givaudan Corporation Process for preparing a myrcenol, cis-ocimenol mixture substantially free of trans-ocimenol

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002224A1 (de) * 1977-12-03 1979-06-13 Dr. Beck & Co. AG Verfahren zur Herstellung von isolierten Wickeldrähten durch Extrusion von Thermoplasten und Thermoplaste zur Ausführung desselben

Also Published As

Publication number Publication date
IN154556B (en:Method) 1984-11-10
BR8005518A (pt) 1981-05-12
JPS5673817A (en) 1981-06-18
CA1140311A (en) 1983-02-01
DE2935458C2 (de) 1983-01-20
EP0024674A1 (de) 1981-03-11
FI802509A7 (fi) 1981-01-01
DE2935458A1 (de) 1981-03-19
ATE7433T1 (de) 1984-05-15
JPS596012B2 (ja) 1984-02-08
DK369380A (da) 1981-03-02
AU535473B2 (en) 1984-03-22
DE3067759D1 (en) 1984-06-14
AU6144280A (en) 1981-03-05
US4406851A (en) 1983-09-27

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