EP2715742B1 - Halberzeugnis in form eines leitenden streifens zur einbettung in einem verbundwerkstoff und verfahren zur herstellung eines solchen streifens - Google Patents

Halberzeugnis in form eines leitenden streifens zur einbettung in einem verbundwerkstoff und verfahren zur herstellung eines solchen streifens Download PDF

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Publication number
EP2715742B1
EP2715742B1 EP12722133.1A EP12722133A EP2715742B1 EP 2715742 B1 EP2715742 B1 EP 2715742B1 EP 12722133 A EP12722133 A EP 12722133A EP 2715742 B1 EP2715742 B1 EP 2715742B1
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EP
European Patent Office
Prior art keywords
semifinished product
layers
product according
conductive layer
semi
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Application number
EP12722133.1A
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English (en)
French (fr)
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EP2715742A1 (de
Inventor
Jesus Aspas Puertolas
Nicolas Maisonnave
Mathieu SAUZEDDE
Michel Bermudez
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.)
Airbus SAS
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Airbus SAS
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/08—Flat or ribbon cables
    • H01B7/0838—Parallel wires, sandwiched between two insulating layers
    • 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
    • H01B7/02—Disposition of insulation
    • 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
    • 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
    • H01B13/10—Insulating conductors or cables by longitudinal lapping
    • H01B13/103—Insulating conductors or cables by longitudinal lapping combined with pressing of plastic material around the conductors
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing

Definitions

  • the invention relates to a semifinished product in the form of an integrated conductive strip in a laminated composite material.
  • the invention is more particularly, but not exclusively, applicable in the aeronautical field for producing elements made of composite materials reinforced by a fibrous reinforcement in a matrix made of a polymer, in order to confer on these structural elements capabilities electrical conduction.
  • Structural elements made of a laminated composite material with fiber reinforcement and having, moreover, electrical conduction properties are described in the prior art and in particular in the document FR-A-2924894 .
  • This document discloses a laminated structural part comprising, between two fibrous reinforcement plies, a layer comprising a network of conductive cables.
  • Said document also describes a method for obtaining such a structural element, wherein layers of conductive cables are inserted between one or more pairs of structural folds, so as to constitute a dry preform, the assembly then being impregnated with a resin by a resin transfer process to form the matrix and to provide the cohesion of the composite material.
  • This method of obtaining by resin transfer is however not suitable, or proves to be unproductive, for certain parts, particularly thin and large parts, such as fuselage panels, where such a method can not be used. to compete, in terms of productivity, especially with processes implementing draping pre-impregnated folds.
  • the document US 2006/169481 A1 discloses a flat wire rope 10 having in its cross-section: a first conductive layer 12 made of an electrically conductive material; two electrically insulating layers 14, 16 made of a dielectric material; two connecting layers 28 extending in thickness on either side of the insulating layers outside the semi-product.
  • the document US 2001/011603 A1 discloses a flat wire rope 11 having in its cross-section: a first conductive layer 11c made of an electrically conductive material; two electrically insulating layers 11b made of a dielectric material completely enclosing the conductive layer and whose width in section is greater than the width of the conductive layer.
  • the semi-finished product according to the invention comprises connecting layers making it possible, on the one hand, to ensure the connection of said semi-product with a preform at the time of draping, and on the other hand, the cohesion of the layer.
  • conductive with all the stratification of the composite material, during the cooking or consolidation of the stack constituting the part in which is integrated said conductive layer.
  • such a part, incorporating a conductive layer can be achieved by manual or automated draping techniques, implementing pre-impregnated folds.
  • the invention can be implemented according to the advantageous embodiments, described below, which can be considered individually or in any technically operative combination.
  • the insulating layers consist of a partially vulcanized elastomer.
  • this elastomer layer gives the laminated piece having a conductive layer integrated in said part via a semi-finished product according to the invention, vibroacoustic absorption capabilities and ability to mechanically protect said conductive layer.
  • the partial vulcanization of the insulating layers makes it possible to perfect this vulcanization during the firing of the laminated part incorporating the semi-finished product according to the invention, and thus to ensure a strong cohesion of the conductive layer with the rest of the part.
  • the insulating layers consist of a partially vulcanized elastomer with a vulcanization rate of the order of 60%.
  • a vulcanization rate of the order of 60%.
  • Such partial vulcanization is achieved by heating for a short time.
  • the heating temperature is generally of the order of 110 ° C.
  • the bonding layers consist of a thermosetting glue.
  • the semifinished product has adequate tackiness for its deposition by draping on a preform.
  • the tie layers consist of a thermoplastic polymer. This feature improves the resistance to impact and thermal stresses of the entire laminate in which such a semi-product is integrated.
  • the thermoplastic polymer comprises polyetherimide or PEI. Since this polymer is at least partially miscible in many thermosetting and thermoplastic resins, this characteristic makes it possible to ensure a strong cohesion of the conductive layer with the rest of the laminated composite part.
  • the insulating layers and the bonding layers consist of a partially polymerized thermosetting resin.
  • the semi-product object of the invention fits perfectly by draping in a lamination of pre-impregnated plies of such a thermosetting resin.
  • the partial polymerization makes it possible at one and the same time to preserve the cohesion of the semifin object of the invention during draping, but also to preserve the flexibility required for this draping operation.
  • the insulating layers and the bonding layers consist of a partially polymerized thermosetting resin, with a resin polymerization rate of 60 to 80%.
  • a partial polymerization is carried out by heating for a short time.
  • the heating temperature is of the order of generally around 80 ° C. to 110 ° C., depending on the resins used.
  • the insulating layers and the tie layers consist of a thermoplastic elastomer comprising polyetherimide (PEI). So the semi-product The subject of the invention is capable of being integrated in a stratification constituting a thermoplastic or thermosetting matrix composite.
  • PEI polyetherimide
  • the conductive layer consists of a metal foil, a braid or a metal cable.
  • the finesse of such a foil allows the band to marry any type of shape including shapes double curvature.
  • said metal foil is made of an aluminum alloy which can be obtained by rolling in extremely thin thickness and has a low density.
  • the metal foil may also be made of a copper alloy.
  • the conductive layer consists of a plurality of metallic conductors electrically insulated from one another.
  • the conductive layer consists of several different electrical signals can be transmitted in each of the conductors and the lateral separation of the conductors from one another makes it possible to use thicker conductors without impairing the shaping capacity of the semi-finished product.
  • the method which is the subject of the invention makes it possible to manufacture automatically large quantities of semi-finished products, in the form of strips or coils, which coils can be stored and integrated as much as necessary into laminates constituting parts in material composite.
  • Figure 1 according to a first embodiment of a semifinished product (101, 102) according to the invention, the latter comprises, at the core, a conductive layer (105, 106) which, according to a first variant (101) of embodiment, may consist of a metal foil (105), Figure 1A , or, in a second variant (102), consisting of a plurality (106) of conductors, Figure 1B arranged in a sheet, preferably in the form of so-called flat metal cables.
  • This conductive layer (105, 106) is sandwiched between two insulating layers (121, 122) made of a dielectric material, preferably, but not exclusively, an elastomer.
  • the semifinished product (101, 102) comprises two layers (111, 112) called connection layers having interface characteristics rendering said semi-finished product (101, 102) capable of being draped on a machine. automatic draper and able to form a cohesive interface with fibrous reinforcement layers pre-impregnated following a cooking or consolidation operation.
  • Said bonding layers (111, 112) may be layers attached to the insulating layers, by impregnation of these layers hot or cold, or be an integral part of said insulating layers.
  • Said insulating layers (121, 122) must be sufficiently thick to ensure complete electrical insulation of the conductive layer (105, 106) of its environment in the finished product, ie after the semi-finished product ( 101, 102) object of the invention has undergone a form of draping, to insert it in the heart of a laminate, and then a cooking or consolidation operation at high temperature and under pressure.
  • This insulation must be total and effective, especially for high voltages, of the order of 3000 volts.
  • the insulating layers (121, 122) must also be watertight, but retain sufficient flexibility to allow the semi-finished product (101, 102) to be rolled for installation on an automatic draper machine, and to be able to undergo a peel-press operation on the preform without the integrity of said layers being degraded by these mechanical stresses.
  • the semifinished product (101, 102) of the invention must ensure the transfer of mechanical loads between the folds located on either side of said semi-product, without constituting a weak zone in the stack and without losing its integrity with respect to its electrical insulation and sealing properties.
  • the conductive layer (105) consists of a foil.
  • Said foil (105) may consist of a copper foil or an aluminum alloy. Since said foil (105) is thin, it is easily adapted to draping operations.
  • the foil has a width of 20 mm, which for a conductive section of 1 mm 2 leads to a thickness (135) of said foil of 0.05 mm.
  • This foil of thin layer can be inserted in thin resin layers, thus, the insulating layers (121, 122) can consist of a thermosetting resin, partially polymerized, for example with a resin polymerization rate of the order of 60 at 80%.
  • This partial polymerization placing said resin in a so-called half-cooked state, makes it possible to preserve said resin with a certain tack, so that the bonding layers (111, 112) are constituted by the outside of the insulating layers (121, 122 ).
  • the flexibility of the band is then sufficient to be draped, but of sufficient rigidity to support said foil and prevent it from creasing during these draping operations.
  • the subsequent firing of the lamination corresponding to the finished part makes it possible, by the polymerization of the assembly, to produce a strongly cohesive connection of the semi-finished product (101) with the rest of the part.
  • the conductive layer (106) consists of a plurality of conductors, for example in the form of so-called flat cables.
  • This configuration makes it possible to transit different signals in each of the conductors.
  • the section of each conductor must be sufficient individually so that, compared to the foil (105), this technical solution leads to a substantially greater thickness (136) of each of the conductors.
  • each flat cable having a width (146) of 2 mm, a conductive section of 1 mm 2 is obtained for a thickness (136) of conductors of 0.5 mm.
  • this embodiment leads to a substantially higher semi-product thickness (102).
  • each flat cable must be spaced transversely from its neighbor by a distance (246) sufficient, typically of the same order of magnitude as the width (146) of the cable. This distance must also be filled by the insulating layers (121, 122).
  • the insulating layers (121, 122) are advantageously made of a partially vulcanized elastomer.
  • the flexibility of the insulating layers (121, 122) is controlled at different stages of manufacture of the semi-product (102) and its implementation for the constitution of a laminated structural part, by the vulcanization rate of said layers (121, 122) insulating.
  • the conductors or the foil are unwound from a roller (306) of great length.
  • a continuous surface treatment (310) two strips (321, 322) are attached to said conductors or foil by rolling (330) or calendering.
  • the two strips (321, 322) consist of a raw elastomer.
  • the strips (321, 322) of elastomer are very malleable and plastic and, during the calendering operation (330), they perfectly fit the conductors (306) and in particular fill the spaces between said conductors.
  • the assembly thus produced is then partially vulcanized by passing through a cooking station (340) for example with a vulcanization rate of the order of 60%.
  • the insulating elastomer layers achieve a cohesion and elastic behavior that allows to roll (350) the tape on a roll for installation on an automatic draper and the removal of the said tape by draping on a pegy preform.
  • the partially vulcanized semi-finished product is cooked or consolidated with said preform.
  • the rigidity thereof increases, so that a mechanical transfer of forces can be achieved through said semi-product.
  • the presence of polyetherimide in the elastomer constituting said insulating layers (121, 122) allows a strong chemical cohesion between the semi-finished product of the invention and the rest of the stratification, because of the at least partial miscibility of this polymer in both thermoplastic resins and thermosetting resins.
  • a very rigid laminate allows an effective transfer of forces on either side of the semi-product (101, 102) object of the invention when it is integrated into the final piece.
  • the elasticity of the semi-product gives the structural part incorporating said semi-product vibroacoustic damping capabilities.
  • the invention achieves the desired objectives, in particular it allows the continuous and economical manufacture of semifinished products (101, 102) ready to be draped with the aid of an automatic machine and integrable on demand in the lamination of a composite piece with fibrous reinforcement, giving said room capabilities for routing a signal or electrical power.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)
  • Moulding By Coating Moulds (AREA)

Claims (11)

  1. Halbprodukt in Form eines Bandes (101, 102), das durch Umhüllen abgelagert werden kann, um ein faserverstärktes, laminiertes Verbundmaterial zu bilden, das Halbprodukt umfasst Folgendes in einem Querschnitt und auf seiner gesamten Länge:
    a. eine erste leitende Schicht (105, 106), die aus einem elektrisch leitenden Material gebildet ist;
    b. zwei elektrisch isolierende Schichten (121, 122), die aus einem dielektrischen Material gebildet sind, die die leitende Schicht (105, 106) vollständig umschließen und deren Breite im Querschnitt größer als die Breite der leitenden Schicht ist;
    c. zwei Verbindungsschichten (111, 112), die sich in Dickenrichtung beiderseits der isolierenden Schichten (121, 122) außerhalb des Halbprodukts erstrecken, wobei die beiden Verbindungsschichten Grenzflächeneigenschaften aufweisen, derart, dass das Halbprodukt mit vorinstallierten faserverstärkten Schichten nach einem Einbrenn- oder Verfestigungsvorgang eine Kohäsionsgrenzfläche bilden kann.
  2. Halbprodukt nach Anspruch 1, dadurch gekennzeichnet, dass die isolierenden Schichten (121, 122) aus einem teilweise vulkanisierten Elastomer gebildet sind.
  3. Halbprodukt nach Anspruch 2, dadurch gekennzeichnet, dass die Verbindungsschichten (111, 112) aus einem wärmehärtbaren Klebstoff gebildet sind.
  4. Halbprodukt nach Anspruch 2, dadurch gekennzeichnet, dass die Verbindungsschichten (111, 112) aus einem thermoplastischen Polymer gebildet sind.
  5. Halbprodukt nach Anspruch 4, dadurch gekennzeichnet, dass das thermoplastische Polymer, das die Verbindungsschichten (111, 112) bildet, Polyetherimid enthält.
  6. Halbprodukt nach Anspruch 1, dadurch gekennzeichnet, dass die isolierenden Schichten (121, 122) und die Verbindungsschichten (111, 112) aus einem teilweise polymerisierten wärmehärtbaren Harz gebildet sind.
  7. Halbprodukt nach Anspruch 1, dadurch gekennzeichnet, dass die isolierenden Schichten (121, 122) und die Verbindungsschichten (111, 112) aus einem thermoplastischen Elastomer, das Polyetherimid enthält, gebildet sind.
  8. Halbprodukt nach Anspruch 1, dadurch gekennzeichnet, dass die leitende Schicht (105) aus metallischem Flittergold gebildet ist.
  9. Halbprodukt nach Anspruch 8, dadurch gekennzeichnet, dass das Flittergold (105) aus einer Aluminiumlegierung gebildet ist.
  10. Halbprodukt nach Anspruch 1, dadurch gekennzeichnet, dass die leitende Schicht aus einer Mehrzahl (106) metallischer Leiter, die voneinander elektrisch isoliert sind, gebildet ist.
  11. Verfahren für die Herstellung eines Halbprodukts nach Anspruch 2, dadurch gekennzeichnet, dass es die folgenden Schritte umfasst:
    a. Überziehen durch einen Kalandriervorgang (330) eines Bandes (306) aus einem elektrisch leitenden Material mit zwei unbearbeiteten Elastomerschichten (321, 322);
    b. teilweises Vulkanisieren (340) der während des vorhergehenden Schrittes gebildeten Gesamtheit;
    c. Bringen (350) der Gesamtheit in die Form einer Rolle, die in einer Umhüllungsmaschine verwendet werden kann.
EP12722133.1A 2011-05-27 2012-05-15 Halberzeugnis in form eines leitenden streifens zur einbettung in einem verbundwerkstoff und verfahren zur herstellung eines solchen streifens Active EP2715742B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1154667A FR2975864A1 (fr) 2011-05-27 2011-05-27 Semi-produit sous la forme d'une bande conductrice integrable dans un materiau composite et procede de fabrication d'une telle bande
PCT/EP2012/059056 WO2012163674A1 (fr) 2011-05-27 2012-05-15 Semi-produit sous la forme d'une bande conductrice intégrable dans un matériau composite et procéde de fabrication d'une telle bande

Publications (2)

Publication Number Publication Date
EP2715742A1 EP2715742A1 (de) 2014-04-09
EP2715742B1 true EP2715742B1 (de) 2019-07-24

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Country Status (4)

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US (1) US20140290977A1 (de)
EP (1) EP2715742B1 (de)
FR (1) FR2975864A1 (de)
WO (1) WO2012163674A1 (de)

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JP5916678B2 (ja) * 2013-10-03 2016-05-11 古河電気工業株式会社 アルミニウム・樹脂複合体、アルミニウム絶縁電線及びフラットケーブル並びにそれらの製造方法
FR3039923B1 (fr) 2015-08-04 2020-10-09 Abmi Sud Est Procede de fabrication d'un materiau composite
CN109988522B (zh) * 2017-12-29 2020-11-06 宁德时代新能源科技股份有限公司 胶带、含有该胶带的电化学装置
DE102018114627B4 (de) * 2018-06-19 2024-02-15 Auto-Kabel Management Gmbh Verfahren und Vorrichtung zur Herstellung eines Kabels
CN114571532B (zh) * 2020-11-30 2024-04-02 上海昊佰智造精密电子股份有限公司 一种防折弯褶皱铜箔模切件制作用模切装置及制作方法

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US3897187A (en) * 1971-11-15 1975-07-29 Greengate Cables Limited Apparatus for the continuous production of laminated electric conductors
JP2942458B2 (ja) * 1993-04-16 1999-08-30 住友電気工業株式会社 フラットケーブル用導体の製造方法および製造設備
WO1997001437A1 (en) * 1995-06-28 1997-01-16 Fraivillig Materials Company Circuit board laminates and method of making
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Also Published As

Publication number Publication date
FR2975864A1 (fr) 2012-11-30
EP2715742A1 (de) 2014-04-09
US20140290977A1 (en) 2014-10-02
WO2012163674A1 (fr) 2012-12-06

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