FR2587534A1 - Method for obtaining an electrically conducting zone on a non-conducting part - Google Patents

Method for obtaining an electrically conducting zone on a non-conducting part Download PDF

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Publication number
FR2587534A1
FR2587534A1 FR8513576A FR8513576A FR2587534A1 FR 2587534 A1 FR2587534 A1 FR 2587534A1 FR 8513576 A FR8513576 A FR 8513576A FR 8513576 A FR8513576 A FR 8513576A FR 2587534 A1 FR2587534 A1 FR 2587534A1
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Prior art keywords
track
fibers
conductive
fabric
composite material
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Granted
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FR8513576A
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French (fr)
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FR2587534B1 (en
Inventor
Rene Claverie
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Direction General pour lArmement DGA
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Direction General pour lArmement DGA
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • B29D23/003—Pipe joints, e.g. straight joints
    • B29D23/005—Pipe joints, e.g. straight joints provided with electrical wiring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • B29C53/562—Winding and joining, e.g. winding spirally spirally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • B29C53/58—Winding and joining, e.g. winding spirally helically
    • B29C53/581—Winding and joining, e.g. winding spirally helically using sheets or strips consisting principally of plastics material
    • B29C53/582—Winding and joining, e.g. winding spirally helically using sheets or strips consisting principally of plastics material comprising reinforcements, e.g. wires, threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/88—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
    • B29C70/882—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced partly or totally electrically conductive, e.g. for EMI shielding
    • B29C70/885—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced partly or totally electrically conductive, e.g. for EMI shielding with incorporated metallic wires, nets, films or plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
    • B29K2995/0005—Conductive

Abstract

The invention relates to a method and a device for obtaining an electrically conducting zone on a non-conducting part. A bundle of contiguous carbon fibres are interposed between two strips 2, 3 of a fabric made from composite material in order to constitute at least one conducting track 6, 7, 8 and then one face of the assembly obtained is covered with a layer of non-conducting fibres impregnated with polymerisable resin. Each conducting track may be integrated with the strips of fabric by composite (hydrid) weaving of carbon fibre and fibres of the composite material or by adhesively bonding the carbon fibres and the fibres of the composite material which are impregnated with polymerisable resin. Applied to the manufacture of a tubular body provided with a conducting track on its internal surface, after weaving, the fabric obtained is placed over a mandrel 5 so as to ensure an edge-to-edge connection or a covering of the track, then a metal stud 9, 10, 11 is applied on each track 6, 7, 8 and a layer of non-conducting fibres is produced by filament winding.

Description

Le secteur technique de la présente invention est celui des procédés d'obtention de zones électriquement conductrices sur une pièce non-conductrice par exemple en matériau composite. The technical sector of the present invention is that of methods for obtaining electrically conductive zones on a non-conductive part, for example made of composite material.

On sait déjà réaliser des pistes conductrices sur des matériaux non conducteurs. Ainsi, on connatt un procédé qui consiste à rapporter simplement par collage des pistes conductrices métalliques sur la pièce. Ce procédé ne donne toutefois pas satisfaction en raison des tolérances dimensionnelles et d'ajustement entre la piste métallique et la pièce, difficiles à maîtriser. De plus, en raison de la présence indispensable d'un insert de liaison avec la source de courant, il est difficile d'assurer une jonction mécanique fiable entre l'insert et la piste. Au bout de quelque temps d'utilisation, la tenue mécanique et l'étanchéité ne sont plus assurées. We already know how to make conductive tracks on non-conductive materials. Thus, a process is known which consists in simply attaching metallic conductive tracks to the part by gluing. However, this process is not satisfactory because of the dimensional and adjustment tolerances between the metal track and the part, which are difficult to control. In addition, because of the essential presence of a connection insert with the current source, it is difficult to ensure a reliable mechanical junction between the insert and the track. After some time of use, mechanical strength and tightness are no longer ensured.

Le but de la présente invention est de proposer un procédé de fabrication de pistes conductrices sur une pièce non-conductrice permettant de pallier les inconvénients précités. The object of the present invention is to propose a method of manufacturing conductive tracks on a non-conductive part making it possible to overcome the aforementioned drawbacks.

L'invention a donc pour objet un procédé d'obtention d'une zone électriquement conductrice sur une pièce nonconductrice, caractérisé en ce qu'on interpose un amas de fibres de carbone jointives, entre deux bandes d'un tissu en matériau composite/ pour constituer une piste conductriceJet en ce qu'on recouvre une face de l'ensemble obtenu à l'aide d'une couche de fibres non-conductrices imprégnées de résine polymérisable. The subject of the invention is therefore a process for obtaining an electrically conductive area on a nonconductive part, characterized in that a heap of contiguous carbon fibers is interposed between two strips of a fabric of composite material / for constitute a conductive track Jet in that one side of the assembly obtained is covered using a layer of non-conductive fibers impregnated with polymerizable resin.

Selon une réalisation, la piste conductrice peut être intdgrée aux bandes de tissu par tissage mixte de fibres de carbone et de fibres du matériau composite. According to one embodiment, the conductive track can be integrated into the fabric strips by mixed weaving of carbon fibers and fibers of the composite material.

Selon une autre r#alisation, on peut abord disposer les fibres de carbone pour constituer la piste de conductriceg puis on réalise les bandes du tissu à l'aide de fibres du materiau composite imprégnées de résine polysSrisablee
Avantageuser#nt, les fibres du matériau composite peuvent être des fibres de verre et la résine polyadrisable une résine epoxy. According to another embodiment, it is first possible to arrange the carbon fibers to constitute the conductive track, then the strips of the fabric are produced using fibers of the composite material impregnated with polysisrisable resin.
Advantageously, the fibers of the composite material can be glass fibers and the polyadrisable resin an epoxy resin.

Cette technique permet de réaliser une piste conductrice de forme quelconque sur une pièce non conductrice et d'isoler électriquement une face de cette pièce à l'aide d'une couche de résine. La piste peut être positionnée de manière précise par rapport à la pièce avec une très grande cohésion. This technique makes it possible to produce a conductive track of any shape on a non-conductive part and to electrically isolate one face of this part using a layer of resin. The track can be precisely positioned relative to the workpiece with very high cohesion.

Selon une application du procédé, å la fabrication d'un corps tubulaire muni d'au moins une piste conductrice sur sa surface interne, on place, après tissage, le tissu obtenu sur un mandrin de façon à assurer une jonction bord à bord ou un recouvrement de la piste, puis on applique au moins un plot métallique sur la piste, enfin on réalise la couche de fibres non conductrices par enroulement filamentaire. According to one application of the method, å the manufacture of a tubular body provided with at least one conductive track on its internal surface, the fabric obtained is placed, after weaving, on a mandrel so as to provide an edge-to-edge junction or a covering the track, then at least one metal pad is applied to the track, finally the layer of non-conductive fibers is produced by filament winding.

Selon une autre application, on dispose sur un mandrin la piste conductrice de fibres de carbone et les bandes du tissu en fibres de matériau composite selon la technique de l'enroulement filamentaire, en ce qu'on applique au moins un plot métallique sur la piste et en ce qu'on réalise la couche de fibres non-conductrices selon la technique de l'enroulement filamentaire. According to another application, the conductive track of carbon fibers and the strips of the fabric made of fibers of composite material according to the filament winding technique are placed on a mandrel, in that at least one metal stud is applied to the track. and in that the layer of non-conductive fibers is produced according to the technique of filament winding.

Selon encore une autre application, on peut réaliser trois pistes conductrices disposées à distance l'une de l'autre. According to yet another application, it is possible to produce three conductive tracks arranged at a distance from each other.

Le produit alors obtenu peut être un corps de vérin pneumatique à indexation automatique du piston sur une piste. The product then obtained can be a pneumatic cylinder body with automatic indexing of the piston on a track.

Les pistes sont donc totalement intégrées à la structure du piston et ne modifient pas l'étanchéité du vérin. Celles-ci forment une boucle fermée reliée à la source extérieure de courant par un plot qui n'affecte pas la cohésion mécanique de la piste. Enfin, le procédé selon l'invention permet d'obtenir un corps dont l'alésage possède une très bonne continuité géomé- triquez des caractéristiques mécaniques élevées, et est étanche aux gaz de la même manière qu'une structure composite normale.The tracks are therefore fully integrated into the structure of the piston and do not modify the tightness of the jack. These form a closed loop connected to the external current source by a stud which does not affect the mechanical cohesion of the track. Finally, the method according to the invention makes it possible to obtain a body whose bore has very good geometric continuity with high mechanical characteristics, and is gas-tight in the same way as a normal composite structure.

Selon l'invention, plusieurs pistes peuvent être réalisées de façon économique selon des techniques classiques et on peut mattriser facilement leur espacement, ce qui permet d'assurer un positionnement électrique précis d'une pièce par rapport à une autre. According to the invention, several tracks can be produced economically according to conventional techniques and their spacing can be easily mastered, which makes it possible to ensure precise electrical positioning of one part with respect to another.

D'autres avantages de l'invention seront mieux com pris à l'aide du complément de description qui va suivre qui illustre des exemples concrêts de réalisation en relation avec un dessin sur lequel
- la figure 1 représente un support non conducteur muni de pistes conductrices,
- la figure 2 illustre une étape de la fabrication d'une pièce cylindrique creuse ou corps de vérin,
- la figure 3 illustre un exemple d'application du corps de vérin.Other advantages of the invention will be better understood with the aid of the additional description which follows which illustrates concrete examples of embodiment in relation to a drawing on which
FIG. 1 represents a non-conductive support provided with conductive tracks,
FIG. 2 illustrates a step in the manufacture of a hollow cylindrical part or cylinder body,
- Figure 3 illustrates an example of application of the cylinder body.

L'élément 1, représenté sur la figure 1, est une matrice organique dont on désire, sur une de ses faces, intégrer un conducteur. Cet élément 1 peut être en fibres isolantes du type verre-aramide (de dimension et d'épaisseur quelconque) et est constitué de deux bandes 2 et 3 encadrant une piste conductrice 4. Cette piste 4 est constituée de fibres de carbone (HT ou HM) selon la largeur, la forme ou le dessin voulu. Sur la figure, la piste est réalisée sous forme d'une bande étroite rectiligne. A titre indicatif, la largeur de la piste peut être inférieure à 3 mm. On réalise l'intégration de la piste et des bandes 2 et 3 par tissage mixte des fibres de verre-aramide et des fibres de carbone et on s'arrange pour que le diamètre de toutes les fibres soit approximativement le même.On obtient ainsi un tissu souple dont la mise en forme ultérieure peut être quelconque par exemple plane ou cylindrique. Element 1, represented in FIG. 1, is an organic matrix of which it is desired, on one of its faces, to integrate a conductor. This element 1 can be made of insulating fibers of the glass-aramid type (of any dimension and thickness) and consists of two strips 2 and 3 framing a conductive track 4. This track 4 is made of carbon fibers (HT or HM ) depending on the width, shape or design desired. In the figure, the track is made in the form of a narrow straight strip. As an indication, the width of the track can be less than 3 mm. The integration of the track and the bands 2 and 3 is carried out by mixed weaving of the glass-aramid fibers and of the carbon fibers and it is arranged so that the diameter of all the fibers is approximately the same. flexible fabric whose subsequent shaping can be arbitrary, for example flat or cylindrical.

Pour obtenir une pièce plane, le tissu est placé après confection d'une ou plusieurs pistes sur un support plan. To obtain a flat piece, the fabric is placed after making one or more tracks on a flat support.

La conduction peut être assurée soit par les extrémités des pistes de carbone, soit par des plots ou inserts. Dans ce dernier cas, ceux-ci sont plaqués contre les pistes de carbone et on recouvre la surface libre du tissu d'une ou plusieurs couches de fibres non-conductrices imprégnées de résine polymérisable. Bien entendu, on peut procéder par étalement d'une couche de résine époxy renfermant des fibres de verre. L'état de surface peut être amélioré par des techniques usuelles ou par compression à l'aide d'une presse.Conduction can be ensured either by the ends of the carbon tracks, or by studs or inserts. In the latter case, these are pressed against the carbon tracks and the free surface of the fabric is covered with one or more layers of non-conductive fibers impregnated with polymerizable resin. Of course, one can proceed by spreading a layer of epoxy resin containing glass fibers. The surface condition can be improved by conventional techniques or by compression using a press.

Sur la figure 2, on a représenté un mandrin 5 suscep tible d'être entratné en rotation sur lequel on place le tissu 1. In FIG. 2, a mandrel 5 is shown capable of being driven in rotation on which the fabric 1 is placed.

On voit que ce tissu comprend trois pistes conductrices 6, 7 et 8 réalisées par un tissage mixte. La jonction doit être réalisée soit bord à bord, soit par recouvrement. Dans les deux cas, il est facile de mettre en contact les extrémités de chacune des pistes. Toutefois, il est possible de réaliser plus simplement le tissu 1. Pour cela, on place d'abord les pistes 6, 7 et 8 par enroulement d'une fibre de carbone selon la largeur désirée par rotation du mandrin 5. La continuité de la piste est donc assurée. Puis, on réalise un enroulement de fibres de verre imprégnées de résine époxy de façon à obtenir les bandes 2, 3, 2a et 3a, de même épaisseur que les pistes 6, 7 et 8, et adhérentes à celles-ci. On laisse polymériser et on applique alors les inserts 9, 10 et 11 sur les pistes.We see that this fabric comprises three conductive tracks 6, 7 and 8 produced by a mixed weaving. The junction must be carried out either edge to edge, or by covering. In both cases, it is easy to bring the ends of each of the tracks into contact. However, it is possible to produce the fabric 1 more simply. For this, the tracks 6, 7 and 8 are first placed by winding a carbon fiber according to the desired width by rotation of the mandrel 5. The continuity of the track is therefore assured. Then, a winding of glass fibers impregnated with epoxy resin is carried out so as to obtain the strips 2, 3, 2a and 3a, of the same thickness as the tracks 6, 7 and 8, and adhering to them. It is left to polymerize and the inserts 9, 10 and 11 are then applied to the tracks.

La forme externe de la pièce est ensuite réalisée#ar un enroulement filamentaire de fibres de verre imprégnées de résine époxy, à la fois sur les bandes et les pistes, d'épaisseur adéquate, représenté en coupe sur la figure 3. Les pistes électriques ainsi réalisées sont totalement intégrées à la structure composite de la pièce et sont isolées électriquement entre elles sous plusieurs centaines de volts. Malgré l'imprégnation de résine, on a constaté que la résistance de contact à la surface des pistes existe toujours et est inférieure à quelques ohms. D'autre part, aucune oxydation ne se produit dans le temps. The external shape of the part is then produced # ar a filament winding of glass fibers impregnated with epoxy resin, both on the strips and the tracks, of adequate thickness, shown in section in Figure 3. The electrical tracks as well are completely integrated into the composite structure of the part and are electrically isolated from each other at several hundred volts. Despite the resin impregnation, it was found that the contact resistance on the surface of the tracks still exists and is less than a few ohms. On the other hand, no oxidation occurs over time.

Sur la figure 3, on a représenté une coupe partielle d'un corps de vérin 12 à l'intérieur duquel coulisse un piston 13. Ce piston est muni d'un système d'indexation, comme par exemple une bille 14 soumise à l'action d'un ressort 15. Sur le dessin, on voit l'élément 1 dans lequel est insérée la piste 6, l'insert 9 et l'enroulement 16. Ce dernier peut être réalisé en une ou plusieurs couches comme le montre la figure. Chaque piste réalise un contact franc avec la bille 14, ce qui permet de repérer ou d'indexer le piston 13 par rapport au corps 12. In Figure 3, there is shown a partial section of a cylinder body 12 inside which slides a piston 13. This piston is provided with an indexing system, such as for example a ball 14 subjected to the action of a spring 15. In the drawing, we see the element 1 in which is inserted the track 6, the insert 9 and the winding 16. The latter can be produced in one or more layers as shown in the figure . Each track makes direct contact with the ball 14, which makes it possible to identify or index the piston 13 relative to the body 12.

Le corps de vérin ainsi réalisé est étanche à l'air sous une pression de 6.105 Pa, peut être fabriqué en série, donc dans des conditions économiques plus avantageuses.  The cylinder body thus produced is airtight at a pressure of 6.105 Pa, can be mass produced, therefore under more advantageous economic conditions.

Claims (8)

REVENDICATIONS 1- Procédé d'obtention d'au moins une zone (4) électriquement conductrice sur une pièce non-conductrice (1), caractérisé en ce qu'on interpose un amas de fibres de carbone jointives entre deux bandes (2,3) d'un tissu en matériau composite pour constituer une piste conductrice et en ce qu'on recouvre une face de l'ensemble obtenu à l'aide d'une couche de fibres nonconductrices imprégnées de résine polymérisable.1- A method of obtaining at least one electrically conductive zone (4) on a non-conductive part (1), characterized in that a heap of contiguous carbon fibers is interposed between two strips (2,3) d 'a fabric of composite material to constitute a conductive track and in that one covers one side of the assembly obtained with a layer of nonconductive fibers impregnated with polymerizable resin. 2- Procédé selon la revendication 1, caractérisé en ce que la piste conductrice est intégrée aux bandes de tissu par tissage mixte de fibres de carbone et de fibres du matériau composite.2- A method according to claim 1, characterized in that the conductive track is integrated into the fabric strips by mixed weaving of carbon fibers and fibers of the composite material. 3 - Procédé selon la revendication 1, caractérisé en ce qu'on place d'abord les fibres de carbone pour constituer la piste de conductrice et en ce qu'on réalise les bandes du tissu à l'aide de fibres du matériau composite imprégnées de résine polymérisable.3 - Method according to claim 1, characterized in that first places the carbon fibers to form the conductive track and in that the strips of fabric are produced using fibers of the composite material impregnated with polymerizable resin. 4 - Procédé selon la revendication 3, caractérisé en ce que les fibres du matériau composite sont des fibres de verre et la résine polymérisable une résine époxy.4 - Process according to claim 3, characterized in that the fibers of the composite material are glass fibers and the polymerizable resin an epoxy resin. 5 - Application du procédé selon la revendication 2, à la fabrication d'un corps tubulaire (12) muni d'au moins une piste conductrice sur sa surface interne, caractérisée en ce qu'on place, après tissage, le tissu obtenu sur un mandrin (13) de façon à assurer une jonction bord à bord ou un recouvrement de la piste, en ce qu'on applique au moins un plot métallique (9) sur la piste, et en ce qu'on réalise la couche de fibres non conductrices par enroulement filamentaire.5 - Application of the method according to claim 2, in the manufacture of a tubular body (12) provided with at least one conductive track on its internal surface, characterized in that, after weaving, the fabric obtained is placed on a mandrel (13) so as to ensure an edge-to-edge junction or an overlap of the track, in that at least one metal stud (9) is applied to the track, and in that the layer of fibers is not conductive by filament winding. 6- Application du procédé selon la revendication 3 ou 4 à la fabrication d'un corps tubulaire (12) muni d'au moins une piste conductrice (6) sur sa surface interne, caractérisée en ce qu'on dispose sur un mandrin (13) la piste conductrice de fibres de carbone et les bandes du tissu en fibres de matériau composite selon la technique de l'enroulement filamentaire, en ce qu'on applique au moins un plot métallique (9) sur la piste et en ce qu'on réalise la couche de fibres non-conductrices selon la technique de l'enroulement filamentaire.  6- Application of the method according to claim 3 or 4 to the manufacture of a tubular body (12) provided with at least one conductive track (6) on its internal surface, characterized in that one has on a mandrel (13 ) the conductive track of carbon fibers and the strips of the fabric of fibers of composite material according to the technique of filament winding, in that at least one metal stud (9) is applied to the track and in that produces the layer of non-conductive fibers using the filament winding technique. 7 - Application selon la revendication 5 ou 6, caractérisée en ce que les fibres non-conductrices sont des fibres de verre ou de verre-aramide et la résine polymérisable une résine époxy.7 - Application according to claim 5 or 6, characterized in that the non-conductive fibers are glass or glass-aramid fibers and the polymerizable resin an epoxy resin. 8 - Application selon la revendication 5, 6 ou 7, caractérisée en ce qu'on réalise au moins trois pistes conductrices. 8 - Application according to claim 5, 6 or 7, characterized in that at least three conductive tracks are produced.
FR8513576A 1985-09-13 1985-09-13 METHOD FOR OBTAINING AN ELECTRICALLY CONDUCTIVE AREA ON A NON-CONDUCTIVE PART Expired FR2587534B1 (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
EP0421650A1 (en) * 1989-10-06 1991-04-10 C.R. Bard, Inc. Multilaminate coiled film catheter construction
EP1987945A1 (en) * 2007-05-04 2008-11-05 Sgl Carbon Ag Semifinished product for the manufacture of structural parts from fiber-reinforced composites
WO2019242938A1 (en) * 2018-06-20 2019-12-26 Bayerische Motoren Werke Aktiengesellschaft Compound structure for a vehicle, vehicle with the compound structure, and method for producing the compound structure

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EP0421650A1 (en) * 1989-10-06 1991-04-10 C.R. Bard, Inc. Multilaminate coiled film catheter construction
EP1987945A1 (en) * 2007-05-04 2008-11-05 Sgl Carbon Ag Semifinished product for the manufacture of structural parts from fiber-reinforced composites
WO2008135559A1 (en) * 2007-05-04 2008-11-13 Sgl Carbon Ag Semifinished product for producing components from fibre-reinforced composite materials
WO2019242938A1 (en) * 2018-06-20 2019-12-26 Bayerische Motoren Werke Aktiengesellschaft Compound structure for a vehicle, vehicle with the compound structure, and method for producing the compound structure

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