EP2329503A1 - Electric lead sheathed by foamed polyurethane - Google Patents

Electric lead sheathed by foamed polyurethane

Info

Publication number
EP2329503A1
EP2329503A1 EP09778913A EP09778913A EP2329503A1 EP 2329503 A1 EP2329503 A1 EP 2329503A1 EP 09778913 A EP09778913 A EP 09778913A EP 09778913 A EP09778913 A EP 09778913A EP 2329503 A1 EP2329503 A1 EP 2329503A1
Authority
EP
European Patent Office
Prior art keywords
layer
foamed
insulation
jacket
layers
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
EP09778913A
Other languages
German (de)
French (fr)
Other versions
EP2329503B1 (en
Inventor
Frank Zappe
Oliver Brambach
Helmut Wichmann
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.)
Coroplast Fritz Mueller GmbH and Co KG
Original Assignee
Coroplast Fritz Mueller GmbH and Co KG
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 Coroplast Fritz Mueller GmbH and Co KG filed Critical Coroplast Fritz Mueller GmbH and Co KG
Publication of EP2329503A1 publication Critical patent/EP2329503A1/en
Application granted granted Critical
Publication of EP2329503B1 publication Critical patent/EP2329503B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/185—Sheaths comprising internal cavities or channels
    • 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
    • H01B3/302—Polyurethanes or polythiourethanes; Polyurea or polythiourea
    • 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
    • H01B3/44—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 vinyl resins; acrylic resins
    • H01B3/441—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 vinyl resins; acrylic resins from alkenes
    • 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
    • H01B3/44—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 vinyl resins; acrylic resins
    • H01B3/443—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 vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds
    • H01B3/445—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 vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds from vinylfluorides or other fluoroethylenic compounds
    • 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
    • H01B3/44—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 vinyl resins; acrylic resins
    • H01B3/448—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 vinyl resins; acrylic resins from other vinyl compounds

Definitions

  • the invention relates to a jacketed electrical line, comprising at least one electrical conductor with an insulation and a jacket consisting of a plastic.
  • a known electrical line of this type is described in DE 202 15 523 U1.
  • This line can be used in particular for anti-lock braking systems and sensors of speed measuring systems of motor vehicles and has proven itself in practice.
  • the line has a jacket made of polyurethane.
  • the sheath consists in particular of polyether polyurethane, which may preferably have a hardness in the range of 75 to 95 Shore A.
  • EVA ethylene-vinyl acetate copolymer
  • the dielectric characteristics, in particular the relative dielectric constant play an important role, because these Sizes have a decisive influence on the insulation capacity of the line.
  • said utility model also provides for the insulation of the polyurethane conductor, this having a hardness in the range of 55 to 64 Shore D.
  • this polyurethane material is a thermoplastic material which is reflowable and therefore can easily be subjected to recycling.
  • the present invention has for its object to provide an electrical line of the type mentioned, which has an improved quality in view of the aforementioned mechanical and processing properties.
  • the jacket comprises a foamed layer.
  • the entire jacket is formed from a foamed layer or that the jacket consists of several partial layers, of which at least one is foamed. Due to the spongy structure of a foamed layer, which may be in particular a gas-filled closed-cell material, advantageously reduced by the invention, the specific mass of the line, the stripping over large and oversized cable lengths is facilitated, and improve the torsional behavior as well by a damping effect of the foamed layer, the mechanical pressure resistance and bending fatigue strength.
  • the jacket may advantageously consist, at least in part, of a thermoplastic polyurethane and the foamed layer of a foamed thermoplastic polyurethane.
  • Thermoplastic polyurethane elastomers are semi-crystalline materials and belong to the class of thermoplastic elastomers. They are high-performance materials with a dynamic load capacity, high flexibility over a wide temperature range, high wear resistance as well as buckling and tear resistance (tear and tear resistance) with good resistance to the influence of oil, grease and solvents, weather conditions, Combine ozone and UV radiation, as well as hydrolytic substances and microbes. They are reflowable and can therefore easily be subjected to recycling.
  • FIG. 1 shows a cross section through a first embodiment of a coated electrical conduit according to the invention
  • FIG. 2 shows a cross section through a second embodiment of a conduit according to the invention
  • Fig. 4 shows a cross section through a fourth embodiment of a conduit according to the invention.
  • the jacket 3 comprises a foamed layer 4.
  • the jacket 3 can preferably - completely or partially - consist of a thermoplastic polyurethane (TPU), which may be in particular a polyether polyurethane.
  • TPU thermoplastic polyurethane
  • the use of a polyester-polyurethane is due to its higher thermal stability possible with advantage.
  • the second and third embodiments of the invention in FIGS. 2 and 3 each show a two-layered jacket 3, which is formed from an outer layer 5 and from an inner layer 6.
  • the outer layer 5 is the foamed layer 4; the inner layer 6 is unfoamed.
  • the inner layer 6 is the foamed layer 4, the outer layer 5 is unfoamed.
  • the fourth exemplary embodiment illustrated in FIG. 4 shows a jacket 3, in which an intermediate layer 7 between the outer layer 5 and the inner layer 6 is arranged. It is provided that this intermediate layer 7, in particular exclusively this intermediate layer 7, the foamed layer 4 is. The outer layer 5 and the inner layer 6 are unfoamed. If such a structural design is present, the torsional behavior improves due to the structure of the intermediate layer 7, which is mechanically unstable compared to the outer layer 5 and the inner layer 6.
  • an intermediate layer 7 is likewise arranged in the jacket 3 between the outer layer 5 and the inner layer 6.
  • this intermediate layer 7, in particular exclusively this intermediate layer 7, is the unfoamed layer, while the outer layer 5 and the inner layer 6 are foamed layers 4.
  • the layers 4, 5, 6, 7 can be connected to each other in particular by co-or tandem extrusion.
  • the strength of the adhesion of the individual layers 4, 5, 6, 7 to one another is determined both by the production method and the nature of the layer materials.
  • a structure of the shell 3 with more than three, such as four or five layers, of which at least two layers are foamed layers 4, falls within the scope of the invention.
  • the outer layer 5, the inner layer 6 and / or one or two intermediate layers 7 foamed layers 4 may be.
  • a fluorine-containing polymer layer lying above a TPU layer is considered particularly suitable for reducing swelling of the TPU layer in various media.

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Insulated Conductors (AREA)
  • Organic Insulating Materials (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

The invention relates to a sheathed electric lead, comprising at least one electric conductor (1) having insulation (2) and a sheathing (3) made of plastic. In order to improve the mechanical properties, according to the invention the sheathing (3) comprises a foamed layer (4).

Description

MIT GESCHÄUMTEN POLYURETHAN UMMANTELTE ELEKTRISCHE LEITUNG LUBRICATED POLYURETHANE ENCLOSED ELECTRICAL PIPE
Die Erfindung betrifft eine ummantelte elektrische Leitung, umfassend mindestens einen elektrischen Leiter mit einer Isolierung und einen aus einem Kunststoff bestehenden Mantel.The invention relates to a jacketed electrical line, comprising at least one electrical conductor with an insulation and a jacket consisting of a plastic.
Eine bekannte elektrische Leitung dieser Art ist in der DE 202 15 523 U1 beschrieben. Diese Leitung ist insbesondere für Antiblockiersysteme und Fühler von Drehzahlmesssystemen von Kraftfahrzeugen einsetzbar und hat sich in der Praxis bewährt. Die Leitung weist einen aus Polyurethan bestehenden Mantel auf. Der Mantel besteht insbesondere aus Polyether-Polyurethan, welches bevorzugt eine Härte im Bereich von 75 bis 95 Shore A aufweisen kann. Für die Auswahl der Isolierung des Leiters, für die in der DE 202 15 523 U1 ein Ethylen-Vinylacetat-Copolymer (EVA) als bekannt genannt wird, spielen in der Praxis die dielektrischen Kenngrößen, insbesondere die relative Dielektrizitätskonstante, eine wesentliche Rolle, weil diese Größen entscheidenden Einfluss auf das Isolationsvermögen der Leitung haben. Um bei Wahrung einer hohen Wärmeformstabilität eine verbesserte Recycling-Fähigkeit zu erreichen, sieht das genannte Gebrauchsmuster vor, auch die Isolierung des Leiters aus Polyurethan herzustellen, wobei dieses eine Härte im Bereich von 55 bis 64 Shore D aufweist. Bei diesem Polyurethan-Werkstoff handelt es sich insbesondere um einen thermoplastischen Werkstoff, der wieder aufschmelzbar ist und daher leicht einem Recycling unterworfen werden kann.A known electrical line of this type is described in DE 202 15 523 U1. This line can be used in particular for anti-lock braking systems and sensors of speed measuring systems of motor vehicles and has proven itself in practice. The line has a jacket made of polyurethane. The sheath consists in particular of polyether polyurethane, which may preferably have a hardness in the range of 75 to 95 Shore A. For the selection of the insulation of the conductor, for which in DE 202 15 523 U1 an ethylene-vinyl acetate copolymer (EVA) is known as known, in practice the dielectric characteristics, in particular the relative dielectric constant, play an important role, because these Sizes have a decisive influence on the insulation capacity of the line. In order to achieve improved recycling capability while maintaining a high dimensional stability under heat, said utility model also provides for the insulation of the polyurethane conductor, this having a hardness in the range of 55 to 64 Shore D. In particular, this polyurethane material is a thermoplastic material which is reflowable and therefore can easily be subjected to recycling.
Die DE 202 15 523 U1 verweist hinsichtlich der technischen Anforderungen, die an derartige Leitungen gestellt werden, auf die Bosch-Vorschrift VS 18296-NKA (Oktober 2001) und nimmt im Besonderen neben der Recyclingfähigkeit auf die technischen Parameter Wärmeformbeständigkeit und Biegewechselfestigkeit nach VDE 0472-603/J Bezug. Zu weiteren, insbesondere mechanischen Eigenschaften, die für den Einsatz von Leitungen der eingangs genannten Art von Bedeutung sind, gehört neben der Masse der Leitung auch das Torsionsverhalten. Für die Verarbeitbarkeit der Leitungen spielt auch die Forderung eine Rolle, dass die Leitung, gegebenenfalls auch über größere Leitungsstücke hinweg, in einfacher Weise abmantelbar sein soll.DE 202 15 523 U1 refers to the Bosch requirement VS 18296-NKA (October 2001) with regard to the technical requirements placed on such lines and, in particular, not only the recyclability but also the technical parameters heat distortion resistance and fatigue strength according to VDE 0472- 603 / J cover. To further, in particular mechanical properties, which are of importance for the use of lines of the type mentioned, in addition to the Mass of the line also the torsional behavior. For the workability of the lines and the requirement plays a role that the line, if necessary, even over larger line pieces, should be able to be stripped in a simple manner.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine elektrische Leitung der eingangs genannten Art zu schaffen, die im Hinblick auf die vorstehend genannten mechanischen und Verarbeitungseigenschaften eine verbesserte Qualität aufweist.The present invention has for its object to provide an electrical line of the type mentioned, which has an improved quality in view of the aforementioned mechanical and processing properties.
Erfindungsgemäß wird dies dadurch erreicht, dass der Mantel eine geschäumte Schicht umfasst. Hierbei kann im Detail vorgesehen sein, dass entweder der gesamte Mantel aus einer geschäumten Schicht gebildet ist oder dass der Mantel aus mehreren Teilschichten besteht, von denen mindestens eine geschäumt ist. Aufgrund der schwammigen Struktur einer geschäumten Schicht, bei der es sich insbesondere um ein gasgefülltes geschlossenzelliges Material handeln kann, verringert sich durch die Erfindung vorteilhafterweise die spezifische Masse der Leitung, das Abmanteln über größere und übergroße Leitungslängen wird erleichtert, und es verbessern sich das Torsionsverhalten sowie durch eine dämpfende Wirkung der geschäumten Schicht die mechanische Druckbeständigkeit und die Biegewechselfestigkeit.According to the invention this is achieved in that the jacket comprises a foamed layer. In this case, it can be provided in detail that either the entire jacket is formed from a foamed layer or that the jacket consists of several partial layers, of which at least one is foamed. Due to the spongy structure of a foamed layer, which may be in particular a gas-filled closed-cell material, advantageously reduced by the invention, the specific mass of the line, the stripping over large and oversized cable lengths is facilitated, and improve the torsional behavior as well by a damping effect of the foamed layer, the mechanical pressure resistance and bending fatigue strength.
Der Mantel kann mit Vorteil, zumindest teilweise, aus einem thermoplastischen Polyurethan und die geschäumte Schicht aus einem geschäumten thermoplastischen Polyurethan bestehen. Thermoplastische Polyurethan-Elastomere (TPU) sind teilkristalline Werkstoffe und gehören zu der Klasse der thermoplastischen Elastomere. Sie stellen Hochleistungswerkstoffe dar, welche in ihrem Eigenschaftsbild dynamische Belastbarkeit, hohe Flexibilität in einem weiten Temperaturbereich, hohe Verschleißfestigkeiten sowie Knick- und Reißfestigkeiten (Einreiß- und Weiterreißwider- stand) mit guten Beständigkeiten gegen den Einfluss von Öl, Fett und Lösungsmitteln, die Witterung, Ozon und UV-Strahlung, sowie hydrolytisch wirkende Substanzen und Mikroben kombinieren. Sie sind wieder aufschmelzbar und können daher leicht einem Recycling unterworfen werden.The jacket may advantageously consist, at least in part, of a thermoplastic polyurethane and the foamed layer of a foamed thermoplastic polyurethane. Thermoplastic polyurethane elastomers (TPU) are semi-crystalline materials and belong to the class of thermoplastic elastomers. They are high-performance materials with a dynamic load capacity, high flexibility over a wide temperature range, high wear resistance as well as buckling and tear resistance (tear and tear resistance) with good resistance to the influence of oil, grease and solvents, weather conditions, Combine ozone and UV radiation, as well as hydrolytic substances and microbes. They are reflowable and can therefore easily be subjected to recycling.
Insbesondere aus der Schuhherstellung sind an sich Verfahren bekannt, um thermoplastische Polyurethane mit Treibmitteln zur Herstellung von Schuhsohlen zu verschäumen. Es ist dabei mit Vorteil möglich, durch den relativen Anteil von sogenannten Hart- und Weichsegmenten die Eigenschaften, wie beispielsweise die Festigkeit, Härte und Flexibilität des herzustellenden TPU, in weiten Grenzen zu variie- ren. Die Hartsegmente werden dabei durch für bei der Herstellung eingesetzte Di- isocyanate und kurzkettige Diole, und die Weichsegmente durch Diisocyanate und langkettige Diole gebildet.In particular, from the shoe manufacturing process are known per se to foam thermoplastic polyurethanes with blowing agents for the production of shoe soles. It is advantageously possible, by the relative proportion of so-called hard and soft segments, the properties, such as the strength, hardness and flexibility of the TPU to be produced, to be varied within wide limits. The hard segments are formed by diisocyanates used in the preparation and short-chain diols, and the soft segments by diisocyanates and long-chain diols.
Weitere vorteilhafte Ausgestaltungsmerkmale der Erfindung sind in den Unteransprüchen sowie der folgenden Beschreibung enthalten.Further advantageous features of the invention are contained in the subclaims and the following description.
Anhand mehrerer Ausführungsbeispiele soll im Folgenden die Erfindung näher erläutert werden. Dabei zeigen:On the basis of several embodiments, the invention will be explained in more detail below. Showing:
Fig. 1 einen Querschnitt durch eine erste Ausführung einer erfindungsgemäßen ummantelten elektrischen Leitung,1 shows a cross section through a first embodiment of a coated electrical conduit according to the invention,
Fig. 2 einen Querschnitt durch eine zweite Ausführung einer erfindungsgemäßen Leitung,2 shows a cross section through a second embodiment of a conduit according to the invention,
Fig. 3 einen Querschnitt durch eine dritte Ausführung einer erfindungsgemäßenFig. 3 shows a cross section through a third embodiment of an inventive
Leitung,Management,
Fig. 4 einen Querschnitt durch eine vierte Ausführung einer erfindungsgemäßen Leitung undFig. 4 shows a cross section through a fourth embodiment of a conduit according to the invention and
Fig. 5 einen Querschnitt durch eine fünfte Ausführung einer erfindungsgemäßen Leitung.Fig. 5 shows a cross section through a fifth embodiment of a conduit according to the invention.
In den verschiedenen Figuren der Zeichnung sind gleiche Teile stets mit denselben Bezugszeichen versehen, so dass sie in der Regel auch jeweils nur einmal beschrieben werden.In the various figures of the drawing, like parts are always provided with the same reference numerals, so that they are usually described only once in each case.
Wie sich zunächst aus Fig. 1 - aber auch aus allen weiteren Figuren - ergibt, besteht eine erfindungsgemäße ummantelte elektrische Leitung aus mindestens einem elektrischen Leiter 1 , der von einer Isolierung 2 umgeben ist, und einem aus Kunststoff bestehenden Mantel 3. In den Ausführungsbeispielen sind exemplarisch jeweils vier, vorzugsweise miteinander verseilte, elektrische Leiter 1 mit ihren Isolierungen 2 dargestellt. Der Leiter 1 kann aus einem elektrisch leitfähigen Werkstoff in Form von Litzen oder in Form eines Drahtes bestehen, der bevorzugt einen Durchmesser im Bereich von 0,03 mm bis 3,0 mm aufweisen kann. Ein für den Leiter 1 eingesetzter Draht kann dabei auch aus einer Mehrzahl von Einzeldrähten 1a gebildet sein.As is apparent from Fig. 1 - but also from all other figures - results, there is a sheathed electrical line according to the invention of at least one electrical conductor 1, which is surrounded by an insulation 2, and a plastic jacket 3. In the embodiments are each exemplified four, preferably stranded together, electrical conductors 1 with their insulation 2. The conductor 1 may consist of an electrically conductive material in the form of strands or in the form of a wire, which may preferably have a diameter in the range of 0.03 mm to 3.0 mm. A wire used for the conductor 1 can also be formed from a plurality of individual wires 1a.
Die Isolierung 2 des Leiters 1 kann auch aus Polyurethan oder aus einem für solche Isolierungen - wie bekannt - eingesetzten Material, z. B. aus einem thermoplastischen Elastomer (TPE), insbesondere styrolhaltigen TPE, einem Polyolefin, wie Polypropylen (PP), einem Ethylen-Vinylacetat-Copolymer (EVA) oder einem Fluorpolymer, wie FEP (Tetrafluorethylen-Hexafluorpropylen-Copolymerisat), bestehen.The insulation 2 of the conductor 1 can also be made of polyurethane or a material used for such insulation - as known - material, eg. Example of a thermoplastic elastomer (TPE), in particular styrene-containing TPE, a polyolefin such as polypropylene (PP), an ethylene-vinyl acetate copolymer (EVA) or a fluoropolymer, such as FEP (tetrafluoroethylene-hexafluoropropylene copolymer) exist.
Erfindungsgemäß ist vorgesehen, dass der Mantel 3 eine geschäumte Schicht 4 um- fasst. Der Mantel 3 kann dabei vorzugsweise - ganz oder teilweise - aus einem thermoplastischen Polyurethan (TPU) bestehen, bei dem es sich insbesondere um ein Polyether-Polyurethan handeln kann. Auch der Einsatz eines Polyester-Polyurethans ist aufgrund seiner höheren thermischen Stabilität mit Vorteil möglich.According to the invention, it is provided that the jacket 3 comprises a foamed layer 4. The jacket 3 can preferably - completely or partially - consist of a thermoplastic polyurethane (TPU), which may be in particular a polyether polyurethane. The use of a polyester-polyurethane is due to its higher thermal stability possible with advantage.
Aus den in Fig. 1 bis 4 gezeigten Querschnittsdarstellungen der verschiedenen Ausführungen einer erfindungsgemäßen ummantelten elektrischen Leitung wird deutlich, dass der Aufbau des Mantels 3 unterschiedlich gestaltet sein kann.It is clear from the cross-sectional representations of the different embodiments of a sheathed electrical line according to the invention shown in FIGS. 1 to 4 that the construction of the sheath 3 can be designed differently.
Die erste Ausführung in Fig. 1 zeigt einen einschichtigen Mantel 3, der in seiner Gesamtheit aus der geschäumten Schicht 4 gebildet ist.The first embodiment in Fig. 1 shows a single-layered jacket 3, which is formed in its entirety from the foamed layer 4.
Die zweite und dritte Ausführung der Erfindung in Fig. 2 und 3 zeigen jeweils einen zweischichtigen Mantel 3, der aus einer Außenschicht 5 und aus einer Innenschicht 6, gebildet ist. Bei der zweiten Ausführung der Erfindung ist die Außenschicht 5 die geschäumte Schicht 4; die Innenschicht 6 ist ungeschäumt. Hierdurch wird mit Vorteil neben der Gewichtsreduzierung insbesondere ein im Vergleich zu einem unge- schäumten Mantel erhöhter Klapperschutz erzielt. Bei der dritten Ausführung ist die Innenschicht 6 die geschäumte Schicht 4, die Außenschicht 5 ist ungeschäumt. Hierdurch wird neben der Gewichtsreduzierung mit Vorteil insbesondere ein im Vergleich zu einem ungeschäumten Mantel verbessertes Abmantelverhalten erzielt.The second and third embodiments of the invention in FIGS. 2 and 3 each show a two-layered jacket 3, which is formed from an outer layer 5 and from an inner layer 6. In the second embodiment of the invention, the outer layer 5 is the foamed layer 4; the inner layer 6 is unfoamed. As a result, in addition to the weight reduction, in particular, an increased rattle protection is achieved in comparison to an unfoamed jacket. In the third embodiment, the inner layer 6 is the foamed layer 4, the outer layer 5 is unfoamed. As a result, in addition to the weight reduction with advantage in particular a better compared to a non-foamed shell Abmantelverhalten is achieved.
Das in Fig. 4 dargestellte vierte Ausführungsbeispiel zeigt einen Mantel 3, bei dem zwischen der Außenschicht 5 und der Innenschicht 6 eine Zwischenschicht 7 angeordnet ist. Hierbei ist vorgesehen, dass diese Zwischenschicht 7, insbesondere ausschließlich diese Zwischenschicht 7, die geschäumte Schicht 4 ist. Die Außenschicht 5 und die Innenschicht 6 sind ungeschäumt. Wenn ein solcher konstruktiver Aufbau vorliegt, verbessert sich aufgrund der im Vergleich zur Außenschicht 5 und Innenschicht 6 mechanisch instabileren Struktur der Zwischenschicht 7 das Torsionsverhalten.The fourth exemplary embodiment illustrated in FIG. 4 shows a jacket 3, in which an intermediate layer 7 between the outer layer 5 and the inner layer 6 is arranged. It is provided that this intermediate layer 7, in particular exclusively this intermediate layer 7, the foamed layer 4 is. The outer layer 5 and the inner layer 6 are unfoamed. If such a structural design is present, the torsional behavior improves due to the structure of the intermediate layer 7, which is mechanically unstable compared to the outer layer 5 and the inner layer 6.
Bei dem in Fig. 5 dargestellten fünften Ausführungsbeispiel ist im Mantel 3 ebenfalls zwischen der Außenschicht 5 und der Innenschicht 6 eine Zwischenschicht 7 angeordnet. Hierbei ist jedoch vorgesehen, dass diese Zwischenschicht 7, insbesondere ausschließlich diese Zwischenschicht 7, die ungeschäumte Schicht ist, während die Außenschicht 5 und die Innenschicht 6 geschäumte Schichten 4 sind. Dadurch tritt eine Kombination der Vorteile des zweiten und dritten Ausführungsbeispiels der Erfindung auf.In the fifth exemplary embodiment shown in FIG. 5, an intermediate layer 7 is likewise arranged in the jacket 3 between the outer layer 5 and the inner layer 6. In this case, however, it is provided that this intermediate layer 7, in particular exclusively this intermediate layer 7, is the unfoamed layer, while the outer layer 5 and the inner layer 6 are foamed layers 4. Thereby, a combination of the advantages of the second and third embodiments of the invention occurs.
Die Erfindung ist nicht auf die beschriebenen Ausführungsbeispiele beschränkt, sondern umfasst auch alle im Sinne der Erfindung gleichwirkenden Ausführungen. So können beispielsweise die Anzahl der Leiter 1 oder die geometrischen Abmaße einer erfindungsgemäßen elektrischen Leitung, wie eine Dicke der einzelnen Schichten 3, 4, 5, 6, 7, in weiten Grenzen variieren, ohne dass der Rahmen der Erfindung verlassen wird. Um eine Eigenschaft der erfindungsgemäßen elektrischen Leitung auf einen bestimmten Wert einzustellen, kann auch ein Schäumungsgrad der geschäumten Schicht 4, variiert werden. Unter Schäumungsgrad wird dabei ein Volumenanteil von Gas im Gesamtvolumen der geschäumten Schicht verstanden. So kann der Schäumungsgrad innerhalb der werkstoffbedingten Grenzen in Kombination mit den optimalen Dickenverhältnissen der einzelnen Schichten 3, 4, 5, 6, 7 ausschlaggebend für die Qualität einer insbesondere hoch torsions- und biegewechselbeständigen erfindungsgemäßen elektrischen Leitung sein.The invention is not limited to the embodiments described, but also includes all the same in the context of the invention embodiments. Thus, for example, the number of conductors 1 or the geometric dimensions of an electrical line according to the invention, such as a thickness of the individual layers 3, 4, 5, 6, 7, vary within wide limits, without departing from the scope of the invention. In order to set a property of the electric wire according to the invention to a certain value, a degree of foaming of the foamed layer 4 can also be varied. Foaming degree is understood as meaning a volume fraction of gas in the total volume of the foamed layer. Thus, the degree of foaming within the material-related limits in combination with the optimum thickness ratios of the individual layers 3, 4, 5, 6, 7 can be decisive for the quality of a particularly high torsional and flexural fatigue-resistant electrical line according to the invention.
Die Schichten 4, 5, 6, 7 können insbesondere durch Ko- oder Tandemextrusion miteinander verbunden sein. Die Stärke der Haftung der einzelnen Schichten 4, 5, 6, 7 aneinander wird dabei sowohl durch das Herstellungsverfahren, als auch die Natur der Schichtwerkstoffe bestimmt. Auch ein Aufbau des Mantels 3 mit mehr als drei, wie beispielsweise vier oder fünf Schichten, von denen mindestens zwei Schichten geschäumte Schichten 4 sind, fällt in den Rahmen der Erfindung. Bei einem vier- oder fünfschichtigen Aufbau können beispielsweise die Außenschicht 5, die Innenschicht 6 und/oder ein oder zwei Zwischenschichten 7 geschäumte Schichten 4 sein.The layers 4, 5, 6, 7 can be connected to each other in particular by co-or tandem extrusion. The strength of the adhesion of the individual layers 4, 5, 6, 7 to one another is determined both by the production method and the nature of the layer materials. Also, a structure of the shell 3 with more than three, such as four or five layers, of which at least two layers are foamed layers 4, falls within the scope of the invention. In a four or five-layer structure, for example, the outer layer 5, the inner layer 6 and / or one or two intermediate layers 7 foamed layers 4 may be.
Durch eine geeignete Kombination von geschäumten und ungeschäumten Schichten und/oder Schichten aus unterschiedlichen Werkstoffen kann das Eintreten von unerwünschten Eigenschaftsänderungen, wie eine Reduzierung der Abriebfestigkeit, minimiert oder ganz unterbunden werden. Eine über einer TPU-Schicht liegende fluor- haltige Polymerschicht wird insbesondere als geeignet angesehen, eine Quellung der TPU-Schicht in verschiedenen Medien herabzusetzen.By a suitable combination of foamed and unfoamed layers and / or layers of different materials, the occurrence of undesirable property changes, such as a reduction in abrasion resistance, can be minimized or eliminated altogether. A fluorine-containing polymer layer lying above a TPU layer is considered particularly suitable for reducing swelling of the TPU layer in various media.
Für die Isolierung 2 kann bevorzugt der aus der eingangs genannten DE 202 15 523 U1 bekannte Werkstoff eingesetzt werden, wobei damit der weitere Vorteil verbunden ist, dass der Leiter 1 in blanker, unverzinnter Ausführung eingesetzt werden kann.For the insulation 2, the material known from the initially mentioned DE 202 15 523 U1 can preferably be used, whereby the further advantage is associated therewith that the conductor 1 can be used in a blank, untinned version.
Die Einsatzgebiete einer erfindungsgemäßen Leitung sind nicht auf Anwendungen für Antiblockiersysteme und Fühler von Drehzahlmesssystemen von Kraftfahrzeugen beschränkt. Sie liegen bevorzugt überall dort, wo eine hohe Torsions- und/oder Biegewechselbeständigkeit erforderlich ist, wie beispielsweise bei bestimmten Sensor- und bei Schleppkettenleitungen.The applications of a line according to the invention are not limited to applications for anti-lock braking systems and sensors of speed measuring systems of motor vehicles. They are preferably wherever high torsional and / or bending fatigue resistance is required, such as in certain sensor and drag chain lines.
Ferner ist die Erfindung nicht auf die im Anspruch 1 definierte Merkmalskombination beschränkt, sondern kann auch durch jede beliebige andere Kombination von bestimmten Merkmalen aller insgesamt offenbarten Einzelmerkmale definiert sein. Dies bedeutet, dass grundsätzlich praktisch jedes Einzelmerkmal des Anspruchs 1 weggelassen bzw. durch mindestens ein an anderer Stelle der Anmeldung offenbartes Einzelmerkmal ersetzt werden kann. Insofern ist der Anspruch 1 lediglich als ein erster Formulierungsversuch für eine Erfindung zu verstehen. Furthermore, the invention is not limited to the feature combination defined in claim 1, but may also be defined by any other combination of certain features of all individually disclosed features. This means that in principle virtually every individual feature of claim 1 can be omitted or replaced by at least one individual feature disclosed elsewhere in the application. In this respect, the claim 1 is to be understood only as a first formulation attempt for an invention.
Bezugszeichenreference numeral
1 Leiter1 conductor
1a Einzeldraht von 11a single wire from 1
2 Isolation2 isolation
3 Mantel3 coat
4 geschäumte Schicht4 foamed layer
5 Außenschicht von 35 outer layer of 3
6 Innenschicht von 36 inner layer of 3
7 Zwischenschicht 7 intermediate layer

Claims

Ansprüche claims
1. Ummantelte elektrische Leitung, umfassend mindestens einen elektrischen Leiter (1) mit einer Isolierung (2) und einen aus einem Kunststoff bestehenden Mantel (3), d ad u rch g eke n nze ich n et, dass der Mantel (3) eine geschäumte Schicht (4) umfasst.1. A sheathed electrical conductor, comprising at least one electrical conductor (1) with an insulation (2) and a sheath (3) made of a plastic, which adopts the sheath (3) foamed layer (4).
2. Leitung nach Anspruch 1, d ad u rc h g e k e n n z e i c h n et , dass der gesamte Mantel (3) aus einer geschäumten Schicht (4) gebildet ist.2. The conduit according to claim 1, characterized in that the entire jacket (3) is formed from a foamed layer (4).
3. Leitung nach Anspruch 1, d ad u rc h g eke n nzeich net , dass der Mantel (3) aus mindestens zwei Schichten (5, 6), einer Außenschicht (5) und einer Innenschicht (6), gebildet ist.3. Line according to claim 1, characterized in that the jacket (3) consists of at least two layers (5, 6), an outer layer (5) and an inner layer (6).
4. Leitung nach Anspruch 3, d a d u r c h g e k e n n z e i c h n e t , dass die Außenschicht (5) eine geschäumte Schicht (4) ist.4. A pipe according to claim 3, wherein a skin layer (5) is a foamed layer (4).
5. Leitung nach Anspruch 3 oder 4, d a d u r c h g e k e n n z e i c h n e t , dass die Innenschicht (6) eine geschäumte Schicht (4) ist.5. A conduit according to claim 3 or 4, characterized in that the inner layer (6) is a foamed layer (4).
6. Leitung nach einem der Ansprüche 3 bis 5, d ad u rch geke n nzeich net, dass zwischen der Außenschicht (5) und der Innenschicht (6) mindestens eine Zwischenschicht (7) angeordnet ist. 6. A conduit according to any one of claims 3 to 5, characterized in that at least one intermediate layer (7) is arranged between the outer layer (5) and the inner layer (6).
7. Leitung nach Anspruch 6, d a d u r c h g e k e n n z e i c h n e t , dass die Zwischenschicht (7), insbesondere ausschließlich die Zwischenschicht (7), eine geschäumte Schicht (4) ist.7. A pipe according to claim 6, wherein a layer (7), in particular exclusively the intermediate layer (7), is a foamed layer (4).
8. Leitung nach Anspruch 6, d a d u r c h g e k e n n z e i c h n e t , dass die Zwischenschicht (7), insbesondere ausschließlich die Zwischenschicht (7), eine ungeschäumte Schicht ist.8. The conduit according to claim 6, wherein the intermediate layer, in particular exclusively the intermediate layer, is an unfoamed layer.
9. Leitung nach einem der Ansprüche 3 bis 8, d ad u rch geke n nzeich n et, dass die Schichten (4, 5, 6, 7) durch Ko- oder Tandemextrusion miteinander verbunden sind.9. Cable according to one of claims 3 to 8, d ad u rch geke nzeich n et that the layers (4, 5, 6, 7) are connected to each other by co-or tandem extrusion.
10. Leitung nach einem der Ansprüche 1 bis 9, d a d u r c h g e k e n n z e i c h n e t , dass der Mantel (3), zumindest teilweise, aus einem thermoplastischen Polyurethan besteht.10. A conduit according to any one of claims 1 to 9, wherein a sheath (3), at least in part, consists of a thermoplastic polyurethane.
11. Leitung nach einem der Ansprüche 1 bis 10, d ad u rch geke n nze ich n et, dass die geschäumte Schicht (4) aus einem geschäumten thermoplastischen Polyurethan besteht.11. A conduit according to any one of claims 1 to 10, characterized in that the foamed layer (4) consists of a foamed thermoplastic polyurethane.
12. Leitung nach einem der Ansprüche 1 bis 11 , g e k e n n ze i c h n et d u rc h zwei oder mehr mit einer Isolierung (2) umgebene elektrische Leiter (1), die insbesondere miteinander verseilt sind.12. A cable according to any one of claims 1 to 11, e e c e n e c h n et d u rc h two or more with an insulation (2) surrounded electrical conductor (1), which are in particular stranded together.
13. Leitung nach einem der Ansprüche 1 bis 12, d ad u rc h g e ke n n z e i c h n e t , dass die Isolierung (2) aus einem thermoplastischen Elastomer (TPE), vorzugsweise aus einem styrolhaltigen thermoplastischen Elastomer, aus Polypropylen (PP) oder aus einem anderen Polyolefin, aus einem Ethylen-Vinylacetat-Copolymer (EVA) oder aus einem Fluorpolymer, wie einem Copolymerisat aus Tetrafluorethylen und Hexafluor- propylen (FEP), besteht. 13. A pipe according to any one of claims 1 to 12, characterized in that the insulation (2) consists of a thermoplastic elastomer (TPE), preferably of a styrene-containing thermoplastic elastomer, of polypropylene (PP) or of another polyolefin , from an ethylene-vinyl acetate copolymer (EVA) or from a fluoropolymer, such as a copolymer of tetrafluoroethylene and hexafluoropropylene (FEP) exists.
EP09778913.5A 2008-09-03 2009-01-05 Electric lead sheathed by foamed polyurethane Active EP2329503B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200820011737 DE202008011737U1 (en) 2008-09-03 2008-09-03 Sheathed electrical cable
PCT/EP2009/050035 WO2010025963A1 (en) 2008-09-03 2009-01-05 Electric lead sheathed by foamed polyurethane

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EP2329503A1 true EP2329503A1 (en) 2011-06-08
EP2329503B1 EP2329503B1 (en) 2016-04-13

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EP (1) EP2329503B1 (en)
CN (1) CN101667472B (en)
DE (1) DE202008011737U1 (en)
ES (1) ES2573264T3 (en)
HK (1) HK1142166A1 (en)
HU (1) HUE027761T2 (en)
PL (1) PL2329503T3 (en)
WO (1) WO2010025963A1 (en)

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Also Published As

Publication number Publication date
PL2329503T3 (en) 2016-10-31
CN101667472A (en) 2010-03-10
DE202008011737U1 (en) 2010-01-14
WO2010025963A1 (en) 2010-03-11
EP2329503B1 (en) 2016-04-13
CN101667472B (en) 2012-02-29
HUE027761T2 (en) 2016-10-28
HK1142166A1 (en) 2010-11-26
ES2573264T3 (en) 2016-06-06

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