EP0080138A1 - Method of impregnating spun-coated wires and stranded wires by extrusion of thermoplastics - Google Patents

Method of impregnating spun-coated wires and stranded wires by extrusion of thermoplastics Download PDF

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Publication number
EP0080138A1
EP0080138A1 EP82110490A EP82110490A EP0080138A1 EP 0080138 A1 EP0080138 A1 EP 0080138A1 EP 82110490 A EP82110490 A EP 82110490A EP 82110490 A EP82110490 A EP 82110490A EP 0080138 A1 EP0080138 A1 EP 0080138A1
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EP
European Patent Office
Prior art keywords
wires
strands
wound
extrusion
impregnation
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EP82110490A
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German (de)
French (fr)
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EP0080138B1 (en
Inventor
Helmut Lehmann
Udo Dipl.-Chem. Dr. Reiter
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BASF Coatings GmbH
SI Group Inc
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Dr Beck & Co AG
Beck & Co AG Dr
Beck Dr and Co GmbH
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Priority to AT82110490T priority Critical patent/ATE18314T1/en
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    • 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
    • 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
    • H01B13/065—Insulating conductors with lacquers or enamels

Definitions

  • the invention relates to enamelled wound wires and a new method for impregnating wound round and profile wires and strands.
  • the wires and strands are preferably made of copper or aluminum.
  • the most diverse and more or less temperature-sensitive insulating materials are used, e.g. Cellulose paper, cotton yarn, silk yarn, acetate yarn, polyamide yarn, etc., which are mostly given a temperature-resistant impregnation to improve their thermal properties.
  • the use of glass yarn for spinning is cheaper, since it already meets the highest temperature requirements and also has valuable electrical properties.
  • the wetting and soaking capacity of the glass silk is poor. It is therefore necessary to carry out the impregnation during the spinning process in order to achieve a firm anchoring of the glass fiber on the wire and to prevent the fiberglass braiding from lifting off from the wire when the conductor is inserted into the grooves and the associated bends and twists .
  • the impregnation varnish also has the task of embedding the easily breaking thin glass threads and baking them together, thus giving the wound wire a smooth surface.
  • the dielectric properties are improved.
  • a conventional enamelled wire can be used instead of a bare wire.
  • the enamelled wound wires are usually produced on conventional enamelled wire machines, which have been supplemented by one or two rewinder devices, or on systems which are similar to the commercial horizontal and vertical machines of enamelled wire production.
  • the excess paint is preferably wiped off with a rubber sponge.
  • the invention has for its object to develop an improved and simplified method for impregnating wound wires and strands that overcomes the disadvantages mentioned.
  • the coating of copper or aluminum conductors with thermoplastics in the extrusion process has also been known for a long time.
  • the so-called hose spraying method is used, i.e. in a first step, a hose made of the thermoplastic material is injected around the conductor, which is then shrunk onto the conductor in a second step by stretching. This is achieved in that the withdrawal speed of the conductor is greater than the injection speed of the hose.
  • the layer thickness is regulated solely by the speed.
  • Solvent-free, partially crystalline, thermoplastic polycondensates with a crystallite melting point above 170 ° C. are used as the coating material.
  • thermoplastic polycondensates for the extrusion coating of winding wires are protected (see DE-OS 27 53 917, DE-OS 29 11 269, DE-OS 29 35 4 58 and DE-OS 29 36 795).
  • enamelled wound round and profile wires and strands can be produced by impregnating the wound wires and strands in a single operation with partially crystalline or amorphous thermoplastic polycondensates in an extrusion device are (see claim 1). Further preferred embodiment Forms of the process correspond to the objects of the subclaims.
  • thermoplastic polycondensates mentioned in the earlier applications can be used as the thermoplastic material for the extrusion impregnation according to the invention, for example the following partially crystalline polycondensates: linear aromatic polyesters such as polyethylene terephthalate, optionally also filled with titanium dioxide, linear aliphatic or aromatic polyamides, polyphenylene sulfide, which have crystallite melting points above 170 ° C, and polyether ketones and araliphatic polyamides with crystallite melting points of at least 280 ° C and the amorphous polyether sulfones.
  • linear aromatic polyesters such as polyethylene terephthalate
  • polyphenylene sulfide which have crystallite melting points above 170 ° C
  • polyether ketones and araliphatic polyamides with crystallite melting points of at least 280 ° C and the amorphous polyether sulfones.
  • thermoplastic polycondensates used can be those which have been made flame-retardant using the methods known for fire protection equipment with halogen compounds, also in combination with phosphorus compounds, e.g. Polyethylene terephthalate with brominated oligostyrene or with polybrominated diphenyl ether or with hexabromphenyl and triphenylphosphine oxide. It should be noted that the polyether sulfones do not require any additives because they are inherently flame-retardant (n.Underwriters Lab. Test 94-VO).
  • the wire material for the impregnation according to the invention comprises bare wires as well as enamelled wires and extrusion-coated winding wires in the form of round and profile wires and strands, which are coated with the various insulating materials known for spinning, e.g. Cotton, silk, acetate or polyamide yarn have been spun, but preferably those in which the glass fiber used as the covering material which forms a good basis for thermally resistant insulation is used.
  • the various insulating materials known for spinning e.g. Cotton, silk, acetate or polyamide yarn have been spun, but preferably those in which the glass fiber used as the covering material which forms a good basis for thermally resistant insulation is used.
  • the braided wires and strands impregnated according to the invention have their areas of use wherever high mechanical and thermal requirements are imposed, i.e. the usual areas of application for enamelled wound wires and strands.
  • a 1 L or a 2 L winding wire was used, which had been produced by coating with a polyethylene terephthalate filled with 8% titanium dioxide in the extrusion process and was then wound with glass fiber once or twice. It first went through a preheating section and, after passing through the coating zone in the extruder head, a wiper nozzle to regulate the layer thickness. The impregnated wire then passed a cooling section and was wound up.
  • the specified extruder temperatures refer to the distance from the inlet to the nozzle, whereby the last three temperature specifications apply to the nozzle system.
  • Impregnation and coating material Polyethylene terephthalate filled with 8% titanium dioxide Processing conditions:
  • Impregnation and coating material polyethylene terephthalate, unfilled. Processing conditions:
  • Impregnation and coating material Polyethylene terephthalate filled with 8% titanium dioxide Processing conditions:
  • Impregnation and coating material polyethylene terephthalate, unfilled Processing conditions:

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Ropes Or Cables (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

The purpose of the invention is to manufacture varnish-bonded thread-covered circular-section and profile-section wires and braided conductors in a manner which is particularly cheap and which involves particularly little risk of contaminating the environment. Suitable thread-covered wires and braided conductors are obtained by impregnation, in one operation, with partially crystalline or amorphous thermoplastic polycondensates.

Description

Die Erfindung betrifft lackgebundene umsponnene Drähte und ein neues Verfahren zur Imprägnierung von umsponnenen Rund-und Profildrähten sowie Litzen.The invention relates to enamelled wound wires and a new method for impregnating wound round and profile wires and strands.

Die Drähte und Litzen bestehen dabei vorzugsweise aus Kupfer oder Aluminium.The wires and strands are preferably made of copper or aluminum.

Es ist seit langem bekannt, Kupferleiter oder Aluminiumleiter, ggf. nach vorheriger Lackisolation, mit einer isolierenden Gewebefaserschicht zu umspinnen und die Umspinnung ggf. anschließend mit einem Lack zu imprägnieren.It has long been known to cover copper conductors or aluminum conductors with an insulating fabric fiber layer, if necessary after prior lacquer insulation, and to subsequently impregnate the wrapping with a lacquer if necessary.

Dabei kommen die verschiedenartigsten mehr oder weniger temperaturempfindlichen Isolierstoffe, z.B. Zellulosepapier, Baumwollgarn, Seidengarn, Acetatgarn, Polyamidgarn u.a., zum Einsatz, die meist zur Verbesserung ihrer thermischen Eigenschaften eine temperaturbeständige Imprägnierung erhalten. Günstiger ist der Einsatz von Glasgarn für die Umspinnung, da dieses selbst schon höchsten Temperaturanforderungen genügt und darüber hinaus über wertvolle elektrische Eigenschaften verfügt. Das Netz- und Durchtränkungsvermögen der Glasseide ist allerdings schlecht. Deshalb ist es erforderlich, die Imprägnierung schon bei der Umspinnung vorzunehmen, um so eine feste Verankerung der Glasseide auf dem Draht zu erzielen und zu verhindern, daß beim Einlegen der Leiter in die Nuten und den damit verbundenen Biegungen und Verdrillungen die Glasseidenumspinnung sich vom Draht abhebt.The most diverse and more or less temperature-sensitive insulating materials are used, e.g. Cellulose paper, cotton yarn, silk yarn, acetate yarn, polyamide yarn, etc., which are mostly given a temperature-resistant impregnation to improve their thermal properties. The use of glass yarn for spinning is cheaper, since it already meets the highest temperature requirements and also has valuable electrical properties. The wetting and soaking capacity of the glass silk is poor. It is therefore necessary to carry out the impregnation during the spinning process in order to achieve a firm anchoring of the glass fiber on the wire and to prevent the fiberglass braiding from lifting off from the wire when the conductor is inserted into the grooves and the associated bends and twists .

Der Imprägnierlack hat auch die Aufgabe, die leicht brechenden dünnen Glasfäden einzubetten und miteinander zu verbacken und so dem umsponnenen Draht eine glatte Oberfläche zu verleihen.The impregnation varnish also has the task of embedding the easily breaking thin glass threads and baking them together, thus giving the wound wire a smooth surface.

Durch die Ausfüllung der Zwischenräume bei der Imprägnierung werden die dielektrischen Eigenschaften verbessert. Zur weiteren Verbesserung dieser Eigenschaften kann statt eines Blankdrahtes ein konventioneller Lackdraht eingesetzt werden.By filling the spaces during the impregnation, the dielectric properties are improved. To further improve these properties, a conventional enamelled wire can be used instead of a bare wire.

Bisher sind sehr verschiedenartige Lacke zur Imprägnierung verwendet worden, die den Isolierstoffklassen B, F aber auch H angehören. Durch die temperaturbeständige Glasseide kann aber das Gesamtsystem meist der Klasse H zugeordnet werden.So far, very different types of varnish have been used for the impregnation, which belong to the insulating material classes B, F but also H. Due to the temperature-resistant glass silk, the entire system can usually be assigned to class H.

Die lackgebundenen umsponnenen Drähte werden üblicherweise auf konventionellen Lackdrahtmaschinen, die um eine bis zwei Umspinnvorrichtungen ergänzt worden sind, oder aber auf Anlagen, die den handelsüblichen Horizontal-und Vertikalmaschinen der Lackdrahtproduktion ähnlich sind, hergestellt. Die Abstreifung des überschüssigen Lackes erfolgt vorzugsweise mit einem Gummischwamm.The enamelled wound wires are usually produced on conventional enamelled wire machines, which have been supplemented by one or two rewinder devices, or on systems which are similar to the commercial horizontal and vertical machines of enamelled wire production. The excess paint is preferably wiped off with a rubber sponge.

Für ein Verfahren zur Herstellung lackgebundener glasseidenumsponnener Drähte sind dabei die folgenden Arbeitsgänge möglich:

  • 1) Auftragen eines Lackes auf den Blankleiter im Lackbad
  • 2) Anhärten des Lackfilms
  • 3) 2. Lackauftrag
  • 4) Umspinnen in den nassen Lackfilm
  • 5) 3. Lackauftrag
  • 6) Zweites, häufig gegenläufiges Umspinnen
  • 7) 4. Lackauftrag
  • 8) Aushärten des nach 1) - 7) erhaltenen Isolationsaufbaus
  • 9) 5. Lackauftrag
  • 10) Aushärten
  • ll) Die Arbeitsgänge 9) und 10) mehrmals wiederholen entsprechend den Anforderungen wie gewünschte Schichtstärke etc.
The following operations are possible for a process for the production of enamelled glass silk-wound wires:
  • 1) Apply a varnish to the bare conductor in the varnish bath
  • 2) hardening of the paint film
  • 3) 2nd paint application
  • 4) Spin into the wet paint film
  • 5) 3rd paint application
  • 6) Second, often opposing spinning
  • 7) 4. Paint application
  • 8) Hardening of the insulation structure obtained according to 1) - 7)
  • 9) 5. Paint application
  • 10) Cure
  • ll) Repeat operations 9) and 1 0) several times according to the requirements such as the desired layer thickness etc.

Die vielen Arbeitsgänge weisen auf ein recht umständliches Verfahren hin.The many operations indicate a rather cumbersome process.

Mit der wachsenden Forderung nach elektrischen Leitern mit guten mechanischen und dielektrischen Eigenschaften und hoher Hitzebeständigkeit für den Einsatz auf Gebieten mit hohen mechanischen und thermischen Belastungen, z.B. in Schweißtransformatoren, Bahnmotoren, Anschlußlitzen an elektrischen Bauteilen hoher Temperatur, wächst der Bedarf an umsponnenen Drähten, insbesondere glasseidenumsponnenen Drähten, da die Glasseide als solche schon eine hohe Temperaturfestigkeit bewirkt.With the growing demand for electrical conductors with good mechanical and dielectric properties and high heat resistance for use in areas with high mechanical and thermal loads, e.g. in welding transformers, railway motors, connecting strands on electrical components of high temperature, the need for braided wires, in particular glass-braided wires, grows, since the glass silk as such already brings about a high temperature resistance.

Die o.g. Verfahrensschritte sind nun nicht nur sehr arbeits-und zeitaufwendig. Das Verfahren besitzt auch weitere Nachteile, die insbesondere durch die Verarbeitung stark lösungsmittelhaltiger Lacke verursacht werden. Die Nachteile sind:

  • a) Belastung der Umwelt mit lösungsmittelhaltiger Abluft oder aber aufwendige katalytische Verbrennung der Lösungsmittel!
  • b) Mangelnde Haftung der Umspinnung auf dem Leitermaterial, da der im Verfahren beschriebene dicke Lackfilm nicht optimal ausgehärtet wird.
  • c) Nicht blasenfreie Aushärtung des lösungsmittelhaltigen Lackfilms mit dem Ergebnis schlechter elektrischer Eigenschaftswerte, z.B. Isolationswiderstand, Durchschlagsfestigkeit, und mangelnder Elastizität des Isolationsaufbaus.
The above process steps are now not only very labor and time consuming. The process also has other disadvantages, which are caused in particular by the processing of paints which contain a large amount of solvents. The disadvantages are:
  • a) Pollution of the environment with exhaust air containing solvents or costly catalytic combustion of the solvents!
  • b) Insufficient adhesion of the encapsulation on the conductor material, since the thick lacquer film described in the process is not optimally cured.
  • c) Not bubble-free curing of the solvent-based paint film with the result of poor electrical property values, for example insulation resistance, dielectric strength and inadequate elasticity of the insulation structure.

Der Erfindung liegt die Aufgabe zugrunde, ein verbessertes und vereinfachtes Verfahren zur Imprägnierung umsponnener Drähte und Litzen zu entwickeln, das die genannten Nachteile überwindet.The invention has for its object to develop an improved and simplified method for impregnating wound wires and strands that overcomes the disadvantages mentioned.

Ebenfalls seit längerer Zeit bekannt ist die Beschichtung von Kupfer- oder Aluminiumleitern mit Thermoplasten im Extrusionsverfahren. Dabei wird von dem sogenannten Schlauchspritzverfahren Gebrauch gemacht, d.h. es wird in einem 1. Arbeitsgang ein Schlauch aus dem thermoplastischen Material um den Leiter gespritzt, der anschließend in einem zweiten Arbeitsgang durch Verstrecken auf den Leiter aufgeschrumpft wird. Das wird dadurch erreicht, daß die Abzugsgeschwindigkeit des Leiters größer ist als die Ausspritzgeschwindigkeit des Schlauches. Die Schichtstärke wird dabei allein durch die Geschwindigkeit geregelt.The coating of copper or aluminum conductors with thermoplastics in the extrusion process has also been known for a long time. The so-called hose spraying method is used, i.e. in a first step, a hose made of the thermoplastic material is injected around the conductor, which is then shrunk onto the conductor in a second step by stretching. This is achieved in that the withdrawal speed of the conductor is greater than the injection speed of the hose. The layer thickness is regulated solely by the speed.

Mit dem in einer älteren Anmeldung (vergl. DE-AS 26 38 763) beschriebenen Verfahren wird erstmals die Herstellung von Wickeldrähten durch Extrusion von thermoplastischen Polykondensaten in einem Arbeitsgang ohne Nachbehandlung, wie Verstrecken, und in einer Schichtstärke möglich, die der Norm DIN 46435 entspricht. Die Schichtstärke wird dabei durch das Düsensystem bestimmt.The process described in an earlier application (cf. DE-AS 26 38 763) makes it possible for the first time to produce winding wires by extrusion of thermoplastic polycondensates in one operation without aftertreatment, such as stretching, and in a layer thickness which corresponds to the standard DIN 46435 . The layer thickness is determined by the nozzle system.

Als Beschichtungsmaterial werden lösungsmittelfreie teilkristalline, thermoplastische Polykondensate mit einem Kristallitschmelzpunkt oberhalb 170°C eingesetzt.Solvent-free, partially crystalline, thermoplastic polycondensates with a crystallite melting point above 170 ° C. are used as the coating material.

In weiteren älteren Anmeldungen werden spezielle teilkristallinc und auch amorphe thermoplastische Polykondensate für die Extrusionsbeschichtung von Wickeldrähten unter Schutz gestellt (vergl. DE-OS 27 53 917, DE-OS 29 11 269, DE-OS 29 35 458 und DE-OS 29 36 795).In other older applications, special semi-crystalline and also amorphous thermoplastic polycondensates for the extrusion coating of winding wires are protected (see DE-OS 27 53 917, DE-OS 29 11 269, DE-OS 29 35 4 58 and DE-OS 29 36 795).

Die Lösung der obengenannten Aufgabe ist erfindungsgemäß dadurch erfolgt, daß überraschenderweise gefunden wurde, daß lackgebundene umsponnene Rund- und Profildrähte und Litzen dadurch hergestellt werden können, daß die umsponnenen Drähte und Litzen in einer Extrusionsvorrichtung in einem-einzigen Arbeitsgang mit teilkristallinen oder amorphen thermoplastischen Polykondensaten imprägniert werden (vergl. Anspruch 1).Weitere bevorzugte Ausführungsformen des Verfahrens entsprechen den'Gegenständen der Unteransprüche.The solution to the above object has been achieved according to the invention in that it has surprisingly been found that enamelled wound round and profile wires and strands can be produced by impregnating the wound wires and strands in a single operation with partially crystalline or amorphous thermoplastic polycondensates in an extrusion device are (see claim 1). Further preferred embodiment Forms of the process correspond to the objects of the subclaims.

Mit der Erfindung wird demgemäß zum ersten Mal die aus den genannten älteren Anmeldungen bekannte Extrusionsbeschichtung mit teilkristallinen oder amorphen thermoplastischen Polykondensaten für die Imprägnierung umsponnener Drähte und Litzen eingesetzt, was folgende Vorteile bietet:

  • a) Es sind nicht die sich mehrfach wiederholenden Lackier-und Härtungsprozesse erforderlich, sondern die ein-oder mehrfach umsponnenen Blankleiter, Lackdrähte oder Litzen werden in einem einzigen Arbeitsgang imprägniert und dadurch verfestigt.
  • b) Das Verfahren ist aber nicht nur sehr wirtschaftlich sondern durch den Einsatz der lösungsmittelfreien Thermoplaste auch umweltfreundlich.
  • c) Statt eines bekannten Polyester- oder Polyesterimid-Lackdrahtes üblicher Herstellungsart kann auch ein gemäß den älteren Anmeldungen mit thermoplastischen Polykondensaten im Extrusionsverfahren hergestellter Wickeldraht zur Extrusionsimprägnierung eingesetzt werden.
  • d) Im Gegensatz zu der Lackimprägnierung kann flammwidrig eingestelltes Beschichtungsmaterial eingesetzt werden. Flammwidrige Imprägnierlacke sind nämlich bisher nicht bekannt geworden.
  • e) Die erfindungsgemäß imprägnierten umsponnenen Drähte und Litzen zeichnen sich wohl infolge der Druckimprägnierung in der Düse durch eine verbesserte Einbettung der einzelnen die Umspinnung aufbauenden Fasern und eine bessere Haftung des Isolationsaufbaus auf dem Leiter sowie auch durch eine verbesserte Elastizität aus.
Accordingly, for the first time, the invention uses the extrusion coating with partially crystalline or amorphous thermoplastic polycondensates known from the earlier applications mentioned for the impregnation of wound wires and strands, which offers the following advantages:
  • a) The repetitive repetitive painting and hardening processes are not necessary, but the single or multiple wound blank conductors, enamelled wires or strands are impregnated in a single operation and thereby solidified.
  • b) The process is not only very economical but also environmentally friendly through the use of solvent-free thermoplastics.
  • c) Instead of a known polyester or polyesterimide enamelled wire of the usual type of manufacture, a winding wire produced in accordance with the earlier applications with thermoplastic polycondensates in the extrusion process can also be used for the extrusion impregnation.
  • d) In contrast to the paint impregnation, flame-retardant coating material can be used. So far, flame retardant impregnating varnishes have not become known.
  • e) The wound wires and strands impregnated according to the invention are probably distinguished by the pressure impregnation in the nozzle by improved embedding of the individual fibers forming the spinning and better adhesion of the insulation structure to the conductor and also by improved elasticity.

Als thermoplastisches Material für die erfindungsgemäße Extrusionsimprägnierung können die in den älteren Anmeldungen erwähnten thermoplastischen Polykondensate eingesetzt werden, z.B. die folgenden teilkristallinen Polykondensate: lineare aromatische Polyester wie Polyäthylenterephthalat, ggf.auch mit Titandioxid gefüllt, lineare aliphatische oder aromatische Polyamide, Polyphenylensulfid, die Kristallitschmelzpunkte oberhalb 170°C besitzen, sowie Polyätherketone und araliphatische Polyamide mit Kristallitschmelzpunkten von mindestens 280°C und die amorphen Polyäthersulfone.The thermoplastic polycondensates mentioned in the earlier applications can be used as the thermoplastic material for the extrusion impregnation according to the invention, for example the following partially crystalline polycondensates: linear aromatic polyesters such as polyethylene terephthalate, optionally also filled with titanium dioxide, linear aliphatic or aromatic polyamides, polyphenylene sulfide, which have crystallite melting points above 170 ° C, and polyether ketones and araliphatic polyamides with crystallite melting points of at least 280 ° C and the amorphous polyether sulfones.

Als flammwidrig eingestellte thermoplastische Polykondensate können solche eingesetzt werden, die nach den für die Brandschutzausrüstung bekannten Verfahren mit Halogenverbindungen, auch in Kombination mit Phosphorverbindungen flammwidrig gemacht wurden, z.B. Polyäthylenterephthalat mit bromiertem Oligostyrol oder mit polybromiertem Diphenyläther oder mit Hexabromphenyl und Triphenylphosphinoxid. Es sei bemerkt, daß die Polyäthersulfone keine Zusätze benötigen, da sie an sich flammwidrig sind.(n.Underwriters Lab. Test 94-VO).The flame-retardant thermoplastic polycondensates used can be those which have been made flame-retardant using the methods known for fire protection equipment with halogen compounds, also in combination with phosphorus compounds, e.g. Polyethylene terephthalate with brominated oligostyrene or with polybrominated diphenyl ether or with hexabromphenyl and triphenylphosphine oxide. It should be noted that the polyether sulfones do not require any additives because they are inherently flame-retardant (n.Underwriters Lab. Test 94-VO).

Das Drahtmaterial für die erfindungsgemäße Imprägnierung umfaßt sowohl Blankdrähte als auch Lackdrähte und extrusionsbeschichtete Wickeldrähte in Form von Rund- und-Profildrähten und Litzen, die mit den zur Umspinnung bekannten verschiedenartigen Isolierstoffen, wie z.B. Baumwoll-, Seiden-, Acetat-oder Polyamidgarn, umsponnen worden sind, bevorzugt aber solche, bei denen als Umspinnungsmaterial die eine gute Grundlage für thermisch beständige Isolierungen bildende Glasseide verwendet wurde.The wire material for the impregnation according to the invention comprises bare wires as well as enamelled wires and extrusion-coated winding wires in the form of round and profile wires and strands, which are coated with the various insulating materials known for spinning, e.g. Cotton, silk, acetate or polyamide yarn have been spun, but preferably those in which the glass fiber used as the covering material which forms a good basis for thermally resistant insulation is used.

Die erfindungsgemäß imprägnierten umsponnenen Drähte und Litzen haben ihre Einsatzgebiete überall dort, wo hohe mechanische und thermische Anforderungen gestellt werden, d.h. den üblichen Einsatzgebieten für lackgebundene umsponnene Drähte und Litzen.The braided wires and strands impregnated according to the invention have their areas of use wherever high mechanical and thermal requirements are imposed, i.e. the usual areas of application for enamelled wound wires and strands.

In den folgenden Beispielen werden die Verarbeitungsbedingungen für ein- oder mehrfach umsponnene Drähte und gefüllte oder ungefüllte thermoplastische Polykondensate bei Benutzung der in der Schweizer Patentanmeldung CH 8446/76 beschriebenen Extrusionsvorrichtung angegeben.The following examples show the processing conditions for single or multiple wound wires and filled or unfilled thermoplastic polycondensates when using the extrusion device described in Swiss patent application CH 8446/76.

In den Beispielen 1 bis 4 kam ein 1 L- oder ein 2 L-Wickeldraht, der durch Beschichtung mit einem mit 8 % Titandioxid gefülltem Polyäthylenterephthalat im Extrusionsverfahren hergestellt worden war und dann anschließend mit Glasseide einfach oder zweifach umsponnen wurde, zum Einsatz. Er durchlief zunächst eine Vorheizstrecke und nach Passieren der Beschichtungszone im Extruderkopf eine Abstreiferdüse zur Regulierung der Schichtstärke. Anschließend passierte der imprägnierte Draht eine Kühlstrecke und wurde aufgespult.In Examples 1 to 4, a 1 L or a 2 L winding wire was used, which had been produced by coating with a polyethylene terephthalate filled with 8% titanium dioxide in the extrusion process and was then wound with glass fiber once or twice. It first went through a preheating section and, after passing through the coating zone in the extruder head, a wiper nozzle to regulate the layer thickness. The impregnated wire then passed a cooling section and was wound up.

Die angegebenen Extrudertemperaturen beziehen sich jeweils auf die Strecke vom Einlauf bis zur Düse, wobei die drei letzten Temperaturangaben für das Düsensystem gelten.The specified extruder temperatures refer to the distance from the inlet to the nozzle, whereby the last three temperature specifications apply to the nozzle system.

Beispiel 1example 1

Folgender umsponnener Kupferdraht wurde eingesetzt:The following wound copper wire was used:

Figure imgb0001
Imprägnierungs- und Beschichtungsmaterial: Mit 8 % Titandioxid gefülltes Polyäthylenterephthalat Verarbeitungsbedingungen:
Figure imgb0002
Figure imgb0001
 Impregnation and coating material: Polyethylene terephthalate filled with 8% titanium dioxide Processing conditions:
Figure imgb0002

Beispiel 2Example 2

Eingesetzter Kupferdraht:Inserted copper wire:

Figure imgb0003
Imprägnierungs- und Beschichtungsmaterial: Polyäthylenterephthalat, ungefüllt. Verarbeitungsbedingungen:
Figure imgb0004
Figure imgb0003
 Impregnation and coating material: polyethylene terephthalate, unfilled. Processing conditions:
Figure imgb0004

Beispiel 3Example 3

Eingesetzter Kupferdraht:

Figure imgb0005
Imprägnierungs- und Beschichtungsmaterial: mit 8 % Titandioxid gefülltes Polyäthylenterephthalat Verarbeitungsbedingungen:
Figure imgb0006
 Inserted copper wire:
Figure imgb0005
 Impregnation and coating material: Polyethylene terephthalate filled with 8% titanium dioxide Processing conditions:
Figure imgb0006

Beispiel 4Example 4

Eingesetzter Kupferdraht:

Figure imgb0007
1 x mit Glasseide umsponnen: 0,71 mm Durchmesser Imprägnierungs- und Beschichtungsmaterial: Polyäthylenterephthalat, ungefüllt Verarbeitungsbedingungen:
Figure imgb0008
Figure imgb0009
 Inserted copper wire:
Figure imgb0007
 1 x wound with glass silk: 0.71 mm diameter Impregnation and coating material: polyethylene terephthalate, unfilled Processing conditions:
Figure imgb0008
Figure imgb0009

Claims (8)

1) Verfahren zur Imprägnierung umsponnener Rund- und Profildrähte und Litzen, dadurch gekennzeichnet, daß die umsponnenen Drähte und Litzen in einer Extrusionsvorrichtung in einem einzigen Arbeitsgang mit teilkristallinen oder amorphen thermoplastischen Polykondensaten imprägniert werden.1) Process for the impregnation of wound round and profile wires and strands, characterized in that the wound wires and strands are impregnated in a single operation with partially crystalline or amorphous thermoplastic polycondensates in an extrusion device. 2) Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als thermoplastische Polykondensate teilkristalline thermoplastische Polykondensate mit Kristallitschmelzpunkten oberhalb 170°C verwendet werden.2) Method according to claim 1, characterized in that partially crystalline thermoplastic polycondensates with crystallite melting points above 170 ° C are used as thermoplastic polycondensates. 3) Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als thermoplastische Polykondensate amorphe Polyäthersulfone verwendet werden.3) Method according to claim 1, characterized in that amorphous polyether sulfones are used as thermoplastic polycondensates. 4) Verfahren nach den Ansprüchen 1 bis 3, dadurch gekenn-, zeichnet, daß als thermoplastische-Polykondensate flammwidrige thermoplastische Polykondensate verwendet werden.4) Process according to claims 1 to 3, characterized in that flame-retardant thermoplastic polycondensates are used as thermoplastic polycondensates. 5) Verfahren nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß als umsponnene Drähte umsponnene Blankdrähte eingesetzt werden.5) Method according to claims 1 to 4, characterized in that braided bare wires are used as wound wires. 6) Verfahren nach den Ansprüche 1 bis 4, dadurch gekennzeichnet, daß als umsponnene Drähte und Litzen solche eingesetzt werden, die aus im Lackier- oder im Extrusionsverfahren beschichteten Wickeldrähten erhalten worden sind.6) Method according to claims 1 to 4, characterized in that the wound wires and strands are those which have been obtained from winding wires coated in the coating or in the extrusion process. 7) Verfahren nach den Ansprüche 1 bis 6, dadurch gekennzeichnet, daß als umsponnene Drähte und Litzen glasseidenumsponnene Drähte und Litzen eingesetzt werden.7) Method according to claims 1 to 6, characterized in that as wound wires and strands glass-wound wires and strands are used. 8) Imprägnierte umsponnene Drähte und Litzen, die im Extrusionsverfahren nach den Ansprüchen 1 bis 7 erhalten worden sind.8) Impregnated wound wires and strands, which have been obtained in the extrusion process according to claims 1 to 7.
EP82110490A 1981-11-19 1982-11-13 Method of impregnating spun-coated wires and stranded wires by extrusion of thermoplastics Expired EP0080138B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82110490T ATE18314T1 (en) 1981-11-19 1982-11-13 PROCESS FOR IMPREGNATION OF BRAIDED WIRE AND STRANDS BY EXTRUSION OF THERMOPLASTICS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813145918 DE3145918A1 (en) 1981-11-19 1981-11-19 METHOD FOR IMPREGNATING STRAPPED WIRE WITH STRAND BY EXTRUSION OF THERMOPLASTICS.
DE3145918 1981-11-19

Publications (2)

Publication Number Publication Date
EP0080138A1 true EP0080138A1 (en) 1983-06-01
EP0080138B1 EP0080138B1 (en) 1986-02-26

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US (1) US4590025A (en)
EP (1) EP0080138B1 (en)
JP (1) JPS58501973A (en)
AT (1) ATE18314T1 (en)
BR (1) BR8207940A (en)
DE (2) DE3145918A1 (en)
WO (1) WO1983001864A1 (en)

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JPH05269726A (en) * 1992-03-25 1993-10-19 Mitsui Constr Co Ltd Reinforcing material for structure of civil engineering structure
US6258453B1 (en) 1996-09-19 2001-07-10 Lawrence V. Montsinger Thermoplastic composite materials made by rotational shear
US6533977B1 (en) * 1997-12-10 2003-03-18 Acs Industries, Inc. High temperature composite structure and method of manufacturing same

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EP0031569A1 (en) * 1979-12-27 1981-07-08 Dr. Beck & Co. AG Production of insulated winding wires that can de directly tinned

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EP0031569A1 (en) * 1979-12-27 1981-07-08 Dr. Beck & Co. AG Production of insulated winding wires that can de directly tinned

Also Published As

Publication number Publication date
JPS58501973A (en) 1983-11-17
EP0080138B1 (en) 1986-02-26
BR8207940A (en) 1983-10-04
US4590025A (en) 1986-05-20
DE3269476D1 (en) 1986-04-03
DE3145918A1 (en) 1983-05-26
ATE18314T1 (en) 1986-03-15
WO1983001864A1 (en) 1983-05-26

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