EP0256422B1 - Laser-markable electrical cable - Google Patents
Laser-markable electrical cable Download PDFInfo
- Publication number
- EP0256422B1 EP0256422B1 EP87111246A EP87111246A EP0256422B1 EP 0256422 B1 EP0256422 B1 EP 0256422B1 EP 87111246 A EP87111246 A EP 87111246A EP 87111246 A EP87111246 A EP 87111246A EP 0256422 B1 EP0256422 B1 EP 0256422B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- outer layer
- colour
- laser
- underlayer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- 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
- H01B13/34—Apparatus or processes specially adapted for manufacturing conductors or cables for marking conductors or cables
- H01B13/348—Apparatus or processes specially adapted for manufacturing conductors or cables for marking conductors or cables using radiant energy, e.g. a laser beam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/267—Marking of plastic artifacts, e.g. with laser
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
- B44B7/00—Machines, apparatus or hand tools for branding, e.g. using radiant energy such as laser beams
- B44B7/002—Machines, apparatus or hand tools for branding, e.g. using radiant energy such as laser beams in layered material
-
- 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
- H01B7/36—Insulated conductors or cables characterised by their form with distinguishing or length marks
- H01B7/365—Insulated conductors or cables characterised by their form with distinguishing or length marks being indicia imposed on the insulation or conductor
Definitions
- the present invention relates to a markable electric cable, comprising an outer layer enabling such marking to be carried out, of color contrasted with the color of an undercoat, this outer layer being a thin layer which, when marking, is destroyed throughout its thickness so as to reveal an undercoat.
- German patent n ° 3147230 describes a cable whose external surface first receives by spraying one or two colored coatings, which are baked by HF or infrared waves before their treatment by laser radiation. .
- this document is concerned only with the surface burning obtained by laser radiation.
- a patent Us 4 370 542 claims the marking of a cable by laser, but it in fact only relates to the relative positioning of this cable and of the laser source.
- Against by the present invention relates to a particular arrangement of the outer layer of an electric cable allowing marking by fine and precise laser beam.
- the electric cable according to the invention is characterized in that the outer layer is made of polytetrafluoroethylene added with 10 to 15% of white pigments, or else of polyurethane having a concentration of white pigments greater than 30%, and in that the sub- layer is made of polytetrafluoroethylene added with 5 to 15% of dark pigments, or in aromatic polyamide added of 30 to 35% of dark pigments, capable of allowing the destruction of the outer layer in all its thickness by a laser beam and the absorption of this one by the underlay.
- the outer layer preferably has a thickness of between 5 and 50 micrometers and the sub-layer a minimum thickness of 25 micrometers if it is made of polytetrafluoroethylene or 15 micrometers if it is made of aromatic polyamide.
- FIG. 1 illustrates the marking by laser beam according to the invention.
- a ray 10 from a laser source 11 is directed towards the surface of an electrical cable 12.
- This cable comprises a thin outer layer 13, for example between 5 and 50 micrometers, which surrounds an underlayer 14. This layer exterior is destroyed throughout its thickness at the point of impact 15 of the laser beam thereon, thus revealing the sub-layer 14 which absorbs said laser beam.
- This outer layer 13 being of a contrasting color, for example clear, with respect to the sub-layer, for example dark, the invention makes it possible to obtain a quality marking.
- This sublayer 14 can be pigmented in dark brown or black so as to promote the absorption of the laser beam and allow contrast with the outer layer 13.
- the pigments used can be dark brown pigments "Brown Sicopal K 2795" from the company BASF or black pigments "FA 2306" from the company FERRO, or a combination of pigments, for example based on the two pigments mentioned.
- the minimum thickness of such a sub-layer 14 is such that it makes it possible to stop the penetration of the laser beam 10.
- this radial thickness is of the order of 25 micrometers.
- this thickness is of the order of 15 micrometers.
- the pigment concentration must be between 5 and 15% with the first type of undercoat and between 30 and 35% with the second type of undercoat, so as to preserve good mechanical strength of this undercoat. -layer and to obtain sufficient coloring.
- the outer layer 13 must be such that it allows just the necessary absorption of the laser beam to cause its own pyrolysis. It must indeed be the least absorbent possible while remaining burnable by the laser beam.
- PTFE polytetrafluoroethylene
- BAYER a product of the company BAYER composed of "Desmophen F951" which is a polyol and "Desmodur CT” which is a polyisocyanate, in solution for example in a mixture of cresol and xylene.
- the pigmentation of this layer 13 can be obtained using a white pigment of titanium dioxide in all its forms, rutile or anatase for example, such as "Kronos RN59" from the company NL Chemicals.
- This white pigment can be used alone or mixed with colored pigments in small quantities to obtain clear or pastel shades.
- the thickness of such a layer has a maximum value depending on the type of laser used and its emission power. Indeed, this laser must be able to volatilize this layer to reveal the dark underlay 14.
- the thickness of this layer must preferably be between 5 and 20 micrometers with an outer layer 13 of the first type. considered, and between 5 and 25 micrometers with an outer layer 13 of the second type considered.
- This sublayer is then pigmented in the same way as sublayer 14, so that all of the polyimide and polyamide sublayers have a minimum thickness of the order of 15 micrometers.
- varnishes used are fired according to the traditional methods used in the enameled wire industry, for example by multi-pass coating with dynamic baking in a "parade” oven obtained by the process known as "in die”, or the process known as “by dipping” ".
- varnish deposition techniques such as for example electrophoresis, electrostatic powdering and / or in a fluidized bath.
- the laser marking according to the invention can be carried out on a machine of the type described in US Pat. No. 4,370,542 which allows relative positioning of a cable and a laser source.
- Such a marking can also be carried out by moving a mask in front of a wide laser beam, for example obtained from a Co2 laser (“mask” method), the laser beam being focused after having passed through said mask.
- a mask for example obtained from a Co2 laser (“mask” method
- FIGS. 2 and 3 represent two examples of embodiment of such cables which can be marked by laser according to the invention.
- the marking according to the invention can also be applied to constructions of electric cables, in particular for aerospace use, with improved electrical characteristics, described in French Patent No. 2,555,799.
- the cable according to the invention therefore allows marking which consists in burning a thin external layer, existing or added for the occasion, the gaps thus created in this layer revealing the underlying insulation. This must satisfy the electrical, mechanical, etc. clauses imposed on the cable, and in addition must be able to resist laser radiation, the power of which is adjusted to the level just necessary to burn the outer thin layer.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Insulated Conductors (AREA)
Description
La présente invention concerne un câble électrique marquable, comportant une couche extérieure permettant la réalisation d'un tel marquage, de couleur contrastée par rapport à la couleur d'une sous-couche, cette couche extérieure étant une couche mince qui, lors du marquage, est détruite dans toute son épaisseur de manière à laisser apparaître une sous-couche.The present invention relates to a markable electric cable, comprising an outer layer enabling such marking to be carried out, of color contrasted with the color of an undercoat, this outer layer being a thin layer which, when marking, is destroyed throughout its thickness so as to reveal an undercoat.
Pour réaliser un tel marquage de câble par laser, un brevet allemand n° 3147230 décrit un câble dont la surface externe reçoit d'abord par pistolage un ou deux revêtements colorés, qui sont cuits par ondes HF ou infrarouges avant leur traitement par un rayonnement laser. Mais ce document ne se préoccupe que du brûlage superficiel obtenu par le rayonnement laser.To carry out such a cable marking by laser, a German patent n ° 3147230 describes a cable whose external surface first receives by spraying one or two colored coatings, which are baked by HF or infrared waves before their treatment by laser radiation. . However, this document is concerned only with the surface burning obtained by laser radiation.
Un brevet Us 4 370 542 revendique le marquage d'un câble par laser, mais il ne concerne en fait que le positionnement relatif de ce câble et de la source laser.A patent Us 4 370 542 claims the marking of a cable by laser, but it in fact only relates to the relative positioning of this cable and of the laser source.
Il existe d'autres documents de l'art antérieur qui concernent le marquage de différents types de surface, par exemple plastiques dans des buts d'identification, ou bien de préparation de stencils ou de plaques lithographiques. Certains de ces documents, notamment le brevet européen EP 159529 et le brevet français FR 2520902 mettent en jeu deux couches superficielles, dont l'une est abosrbante pour un rayonnement laser, mais l'autre, externe, est transparente.There are other documents of the prior art which relate to the marking of different types of surface, for example plastics for identification purposes, or else for the preparation of stencils or lithographic plates. Some of these documents, in particular the European patent EP 159529 and the French patent FR 2520902 involve two surface layers, one of which is absorbent for laser radiation, but the other, external, is transparent.
Un document américain US-3509916 propose de distinguer deux conducteurs isolés par deux couches successives d'isolant de couleurs différentes. Il décrit, en effet, le repérage de conducteurs isolés par découpe mécanique ou fusion d'une hélice dans la couche externe de chaque conducteur, ladite découpe ou fusion laissant apparaître la sous-couche contrastée par rapport à la couche externe. Mais un tel procédé ne permet pas d'établir de véritables inscriptions sur un conducteur.An American document US-3509916 proposes to distinguish two conductors insulated by two successive layers of insulator of different colors. It describes, in fact, the identification of insulated conductors by mechanical cutting or fusion of a helix in the outer layer of each conductor, said cutting or fusion revealing the underlayer contrasted with respect to the outer layer. However, such a process does not make it possible to establish real inscriptions on a driver.
Par contre la présente invention a pour objet une disposition particulière de la couche externe d'un câble électrique permettant un marquage par rayon laser fin et précis.Against by the present invention relates to a particular arrangement of the outer layer of an electric cable allowing marking by fine and precise laser beam.
Le câble électrique selon l'invention est caractérisé en ce que la couche extérieure est en polytétrafluoréthylène additionné de 10 à 15 % de pigments blancs, ou bien en polyuréthane agant une concentration en pigments blancs superieure à 30 %, et en ce que la sous-couche est en polytétrafluoréthylène additionné de 5 à 15 % de pigments foncés, ou en polyamide aromatique additionné de 30 à 35 % de pigments foncés, susceptible de permettre la destruction de la couche extérieure dans toute son épaisseur par un faisceau laser et l'absorption de celui-ci par la sous-couche.The electric cable according to the invention is characterized in that the outer layer is made of polytetrafluoroethylene added with 10 to 15% of white pigments, or else of polyurethane having a concentration of white pigments greater than 30%, and in that the sub- layer is made of polytetrafluoroethylene added with 5 to 15% of dark pigments, or in aromatic polyamide added of 30 to 35% of dark pigments, capable of allowing the destruction of the outer layer in all its thickness by a laser beam and the absorption of this one by the underlay.
La couche extérieure a de préférence une épaisseur comprise entre 5 et 50 micromètres et la sous-couche une épaisseur minimale de 25 micromètres si elle est en polytétrafluoréthylène ou de 15 micromètres si elle est en polyamide aromatique.The outer layer preferably has a thickness of between 5 and 50 micrometers and the sub-layer a minimum thickness of 25 micrometers if it is made of polytetrafluoroethylene or 15 micrometers if it is made of aromatic polyamide.
Les caractéristiques et avantages de l'invention ressortiront d'ailleurs de la description qui va suivre, à titre d'exemple non limitatif, en référence aux dessins annexés sur lesquels :
- la figure 1 illustre un câble électrique marquable par laser selon l'invention,
- Les figures 2 et 3 illustrent deux exemples de réalisation de câbles marquables par laser selon l'invention.
- FIG. 1 illustrates an electric cable markable by laser according to the invention,
- Figures 2 and 3 illustrate two exemplary embodiments of cables markable by laser according to the invention.
La figure 1 illustre le marquage par rayon laser selon l'invention. Un rayon 10 issu d'une source laser 11 est dirigé vers la surface d'un câble électrique 12. Ce câble comprend une couche extérieure 13 mince, par exemple comprise entre 5 et 50 micromètres, qui entoure une sous-couche 14. Cette couche extérieure est détruite dans toute son épaisseur au point d'impact 15 du rayon laser sur celle-ci, en laissant apparaître ainsi la sous-couche 14 qui absorbe ledit rayon laser.FIG. 1 illustrates the marking by laser beam according to the invention. A
Cette couche extérieure 13 étant de couleur contrastée, par exemple claire, par rapport à la sous-couche, par exemple sombre, l'invention permet d'obtenir un marquage de qualité.This
A titre d'exemple non limitatif la sous-couche 14, qui doit être absorbante à la longueur d'onde du laser utilisé par exemple YAG (λ = 1,06 µm) ou CO₂ (λ= 10,6 µm), peut avoir les caractéristiques suivantes :
- la sous-
couche 14 peut être réalisée en polytétrafluoréthylène, par exemple en "Téflon 30N" de du Pont de Nemours, en dispersion aqueuse, ou en polyamide aromatique, tel que 1' "Imitec 302" de la Société Imitec en phase solvant (N -méthyl-pyrrolidone).
- the
sublayer 14 can be made of polytetrafluoroethylene, by example in "Teflon 30N" from du Pont de Nemours, in aqueous dispersion, or in aromatic polyamide, such as 1 "Imitec 302" from the company Imitec in solvent phase (N -methyl-pyrrolidone).
Cette sous-couche 14 peut être pigmentée en marron foncé ou en noir de façon à favoriser l'absorption du rayon laser et permettre le contraste avec la couche extérieure 13. Les pigments utilisés peuvent être des pigments marrons foncés "Marron Sicopal K 2795" de la Société BASF ou des pigments noirs "FA 2306" de la Société FERRO, ou une combinaison de pigments, par exemple à base des deux pigments cités.This
L'épaisseur minimale d'une telle sous-couche 14 est telle qu'elle permette d'arrêter la pénétration du rayon laser 10. Ainsi avec une sous-couche en polytétrafluoréthylène cette épaisseur radiale est de l'ordre de 25 micromètres. Avec une sous-couche en polyamide aromatique cette épaisseur est de l'ordre de 15 micromètres.The minimum thickness of such a
La concentration en pigment doit être comprise, avec le premier type de sous-couche, entre 5 et 15% et, avec le second type de sous-couche, entre 30 et 35%, de manière à préserver une bonne tenue mécanique de cette sous-couche et à obtenir une coloration suffisante. La couche extérieure 13 doit être telle qu'elle permette une absorption juste nécessaire du rayon laser pour entraîner sa propre pyrolyse. Elle doit en effet être le moins absorbante possible tout en restant brûlable par le rayon laser.The pigment concentration must be between 5 and 15% with the first type of undercoat and between 30 and 35% with the second type of undercoat, so as to preserve good mechanical strength of this undercoat. -layer and to obtain sufficient coloring. The
Elle peut être réalisé, par exemple, par une dispersion aqueuse en polytétrafluoréthylène (PTFE) de même type que la sous-couche 14, ou par un vernis polyuréthane, par exemple un produit de la Société BAYER composé de "Desmophen F951" qui est un polyol et de "Desmodur CT" qui est un polyisocyanate, en solution par exemple dans un mélange de crésol et de xylène.It can be produced, for example, by an aqueous dispersion of polytetrafluoroethylene (PTFE) of the same type as the
La pigmentation de cette couche 13 peut être obtenue à l'aide d'un pigment blanc de bioxyde de titane sous toutes ses formes, rutile ou anatase par exemple, tel que le "Kronos RN59" de la Société NL Chemicals.The pigmentation of this
Ce pigment blanc peut être utilisé seul ou mélangé à des pigments colorés en faible quantité pour obtenir ainsi des teintes claires ou pastels.This white pigment can be used alone or mixed with colored pigments in small quantities to obtain clear or pastel shades.
Avec une dispersion aqueuse de PTFE la concentration de pigment doit être comprise entre 10 et 15%, par contre avec un vernis polyuréthane elle doit être supérieure à 30%.With an aqueous dispersion of PTFE the pigment concentration must be between 10 and 15%, on the other hand with a polyurethane varnish it must be greater than 30%.
L'épaisseur d'une telle couche a une valeur maximale fonction du type de laser utilisé et de sa puissance d'émission. En effet ce laser doit pouvoir volatiliser cette couche pour faire apparaître la sous-couche foncée 14.The thickness of such a layer has a maximum value depending on the type of laser used and its emission power. Indeed, this laser must be able to volatilize this layer to reveal the
Ainsi si l'on utilise, par exemple, un laser YAG pulsé à 5KHz d'une puissance de 5,6 watts, l'épaisseur de cette couche doit être de préférence comprise entre 5 et 20 micromètres avec une couche extérieure 13 du premier type considéré, et entre 5 et 25 micromètres avec une couche extérieure 13 du deuxième type considéré.Thus if, for example, a YAG laser pulsed at 5 kHz with a power of 5.6 watts is used, the thickness of this layer must preferably be between 5 and 20 micrometers with an
On pourrait, bien entendu, utiliser aussi un laser Co₂.One could, of course, also use a Co₂ laser.
Pour obtenir une bonne tenue thermique du câble on peut disposer sous cette couche extérieure 13 et sous cette sous-couche 14, d'autres sous-couches, par exemple polyimides telles que le "Liquid H" de la Société du Pont de Nemours ou le vernis "Imitec 201" de la Société Imitec.To obtain good thermal resistance of the cable, it is possible to have under this
Cette sous-couche est alors pigmentée de la même façon que la sous-couche 14, de façon que l'ensemble des sous-couches polyimide et polyamide ait une épaisseur minimale de l'ordre de 15 micromètres.This sublayer is then pigmented in the same way as
Les vernis utilisés sont cuits suivant les procédés traditionnels employés dans l'industrie des fils émaillés, par exemple par enduction multipasses avec cuisson dynamique au four " a la défilée " obtenue par le procédé dit "en filière", ou le procédé dit "au trempé". On peut aussi utiliser d'autres techniques de dépôt de vernis telles que par exemple l'électrophorèse, le poudrage électrostatique et/ou en bain fluidisé.The varnishes used are fired according to the traditional methods used in the enameled wire industry, for example by multi-pass coating with dynamic baking in a "parade" oven obtained by the process known as "in die", or the process known as "by dipping" ". One can also use other varnish deposition techniques such as for example electrophoresis, electrostatic powdering and / or in a fluidized bath.
Le marquage laser selon l'invention peut être réalisé sur une machine du type de celle décrite dans le brevet US 4370542 qui permet un positionnement relatif d'un câble et d'une source laser.The laser marking according to the invention can be carried out on a machine of the type described in US Pat. No. 4,370,542 which allows relative positioning of a cable and a laser source.
Un tel marquage peut aussi être réalisé en déplaçant un masque devant un faisceau laser large, par exemple obtenu à partir d'un laser Co₂ (procédé "dit au masque"), le faisceau laser étant focalisé après avoir traversé ledit masque.Such a marking can also be carried out by moving a mask in front of a wide laser beam, for example obtained from a Co₂ laser (“mask” method), the laser beam being focused after having passed through said mask.
Le marquage selon l'invention peut être appliqué à des câbles électriques à usage notamment aérospatial. Ainsi les figures 2 et 3 représentent deux exemples de réalisation de tels câbles marquables par laser selon l'invention.The marking according to the invention can be applied to electric cables for use in particular aerospace. FIGS. 2 and 3 represent two examples of embodiment of such cables which can be marked by laser according to the invention.
Le câble illustré à la figure 2, est constitué :
- d'un conducteur central 16 en cuivre, ou alliage de cuivre, ou aluminium, ou alliage d'aluminum, protégé ou non par un revêtement métallique (étain, nickel, argent, etc...)
- d'une isolation tri-couche comprenant :
- . deux couches rubanées 17 et 18 réalisées en polyimide contre-couchée d'adhésif ou thermodurcissable, solidarisées par traitement thermique ("Kapfon F", "Kapfon HFE" marques déposées de Du Pont de Nemours, "Upilex F" marque déposée par U.B.E Industriels, "Apica AF" marque déposée par KANEGAFUCHI).
- . une troisième couche externe constituée de l'ensemble des 3
20, 21, 19 déposés successivement :vernis couche 20 en polyimide de couleur noire,couche 21 en polyamide aromatique de couleur noire,couche 19 en polyuréthane de couleur blanche ; ces 3 vernis ont une température de service supérieure à 150°C.
- a
central conductor 16 made of copper, or copper alloy, or aluminum, or aluminum alloy, protected or not by a coating metallic (tin, nickel, silver, etc ...) - a three-layer insulation comprising:
- . two taped
17 and 18 made of polyimide back-coated with adhesive or thermosetting, secured by heat treatment ("Kapfon F", "Kapfon HFE" registered trademarks of Du Pont de Nemours, "Upilex F" trademark registered by UBE Industriels, "Apica AF" trademark registered by KANEGAFUCHI).layers - . a third external layer consisting of all 3
20, 21, 19 deposited successively:varnishes layer 20 in black polyimide,layer 21 in black aromatic polyamide,layer 19 in white polyurethane; these 3 varnishes have a service temperature above 150 ° C.
- . two taped
Le câble illustré à la figure 3 est constitué :
- d'un conducteur central 16 ;
- d'un isolation tri-couche comprenant :
- . une première couche rubanée 17 réalisée en polyimide tel que décrit dans l'exemple précédent.
- . une seconde couche rubanée ou extrudée 22, en matériau thermoplastique de température de fusion supérieure ou égale à 150°C, solidarisée par traitement thermique : polytétrafluoréthylène ("Téflon PTFE", marque déposée Du Pont de Nemours), perfluoroalkoxy - polytétrafluoréthylène ("Téflon PFA", marque déposée Du Pont de Nemours, "Hostaflon TFA" marque déposée Hoechst), polytétrafluopréthylène-propylène ("Téflon FEP", marque déposée Du Pont de Nemours), polyéthylène-tétrafluoréthylène ("Tefzel", marque déposée Du Pont de Nemours), polyfluorure de vinylidène ("Kynar", marque déposée Pennwalt), polyétheréther-cétone ("PEEK", marque déposée I.C.I).
- une troisième couche externe, constituée de l'ensemble des deux vernis 24 et 23 déposés successivement : couche 24 en PTFE de couleur noire, couche 23 en PTFE de couleur blanche. Ces deux vernis ont une température de service supérieure ou égale à 260°C.
- a
central conductor 16; - a three-layer insulation comprising:
- . a
first ribbon layer 17 made of polyimide as described in the previous example. - . a second tape or extruded
layer 22, made of thermoplastic material with a melting temperature greater than or equal to 150 ° C., joined together by heat treatment: polytetrafluoroethylene ("Teflon PTFE", registered trademark of Du Pont de Nemours), perfluoroalkoxy - polytetrafluoroethylene ("Teflon PFA ", registered trademark Du Pont de Nemours," Hostaflon TFA "registered trademark Hoechst), polytetrafluoprethylene-propylene (" Teflon FEP ", registered trademark Du Pont de Nemours), polyethylene-tetrafluoroethylene (" Tefzel ", registered trademark Du Pont de Nemours) , polyvinylidene fluoride ("Kynar", trademark Pennwalt), polyetherether ketone ("PEEK", trademark HERE).
- . a
- a third outer layer, consisting of all two
24 and 23 deposited successively:varnishes layer 24 in black PTFE,layer 23 in white PTFE. These two varnishes have a service temperature greater than or equal to 260 ° C.
Le marquage selon l'invention peut également être appliqué aux constructions de câbles électriques, notamment pour usage aérospatial, à caractéristiques électriques améliorées, décrites dans le brevet français no 2 555 799.The marking according to the invention can also be applied to constructions of electric cables, in particular for aerospace use, with improved electrical characteristics, described in French Patent No. 2,555,799.
Le câble selon l'invention permet donc un marquage qui consiste à brûler une couche externe mince, existante ou rapportée pour la circonstance, les manques ainsi créés dans cette couche dévoilant l'isolation sous-jacente. Celle-ci doit satisfaire aux clauses électriques, mécaniques, etc...imposées au câble, et en outre doit être capable de résister au rayonnement laser, dont la puissance est réglée au niveau juste nécessaire à brûler la couche mince externe.The cable according to the invention therefore allows marking which consists in burning a thin external layer, existing or added for the occasion, the gaps thus created in this layer revealing the underlying insulation. This must satisfy the electrical, mechanical, etc. clauses imposed on the cable, and in addition must be able to resist laser radiation, the power of which is adjusted to the level just necessary to burn the outer thin layer.
Claims (4)
- An electric cable markable by laser, comprising an outer layer (13, 19, 23) enabling such marking to be performed, and having a contrasting colour relating to the colour of an underlayer, said outer layer being a thin layer, which is destroyed while being laser-marked through its entire thickness but susceptible of revealing the underlayer (14, 21, 24), characterized in that the outer layer (13, 19, 23) is made of polytetrafluoroethylene with 10 to 15% of white pigments added, or else of polyurethane having a white pigment concentration of more than 30%, and in that the sublayer (14, 21, 24) is made of polytetrafluoroethylene with 5 to 15% of dark pigments added, or else of aromatic polyamide with 30 to 35% of dark pigments added, said laser beam being susceptible to destroy the outer layer through its entire thickness and to be absorbed by the underlayer.
- An electric cable according to claim 1, characterized in that the outer layer (13, 19, 23) has a thickness comprised between 5 and 50 micrometers, and the underlayer has a minimum thickness of 25 micrometers, if it is made of polytetrafluoroethylene, or else of 15 micrometers, if it is made of aromatic polyamide.
- An electric cable according to claims 1 or 2, characterized in that it comprises, disposed around the central conductor (16), two taped insulation layers (17, 18) with a backing adhesive and solidified by thermal treatment, and in that the second insulation layer (18) is coated with a third layer constituted by three successive varnishes: a polyimide varnish which is black in colour (20), said underlayer constituted by an aromatic polyamide varnish which is black in colour (21), and said outer layer constituted of a polyurethane varnish which is white in colour (19).
- An electric cable according to claim 1 or 2, characterized in that it comprises, disposed around the central conductor, a first taped insulation layer (17) followed by a second insulation layer (22), which is taped or extruded and presents a melting temperature higher than or equal to 150°C, and in that the second layer is covered by a third layer constituted by two varnishes in succession: said underlayer constituted by a polytetrafluoroethylene varnish which is black in colour (24), and said outer layer constituted by a polytetrafluoroethylene varnish which is white in colour (23).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8611319A FR2602904B1 (en) | 1986-08-05 | 1986-08-05 | LASER MARKABLE ELECTRIC CABLE |
FR8611319 | 1986-08-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0256422A1 EP0256422A1 (en) | 1988-02-24 |
EP0256422B1 true EP0256422B1 (en) | 1991-07-10 |
Family
ID=9338042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87111246A Expired - Lifetime EP0256422B1 (en) | 1986-08-05 | 1987-08-04 | Laser-markable electrical cable |
Country Status (6)
Country | Link |
---|---|
US (1) | US4808966A (en) |
EP (1) | EP0256422B1 (en) |
CA (1) | CA1287133C (en) |
DE (1) | DE3771283D1 (en) |
ES (1) | ES2023153B3 (en) |
FR (1) | FR2602904B1 (en) |
Families Citing this family (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8726482D0 (en) * | 1987-11-12 | 1987-12-16 | Bicc Plc | Marking flourocarbon surfaces |
GB2215116B (en) * | 1988-02-05 | 1992-07-29 | British Aerospace | A method of marking a cable or tube with a laser. |
US5130721A (en) * | 1989-01-09 | 1992-07-14 | General Laser, Inc. | Laser wire marking method and apparatus |
FR2648270A1 (en) * | 1989-06-09 | 1990-12-14 | Fileca Sa | Cable having a laser-markable jacket |
US4997994A (en) * | 1989-09-01 | 1991-03-05 | At&T Bell Laboratories | Article having marking thereon and methods of making |
FR2656734B1 (en) * | 1990-01-03 | 1992-03-20 | Filotex Sa | ELECTRIC OR FIBER OPTIC CABLE MARKABLE BY SEVERAL TYPES OF LASERS. |
US5061341A (en) * | 1990-01-25 | 1991-10-29 | Eastman Kodak Company | Laser-ablating a marking in a coating on plastic articles |
US4970367A (en) * | 1990-02-02 | 1990-11-13 | Miller Richard T | Laser wire stripper apparatus and method therefor |
US5474627A (en) * | 1990-10-11 | 1995-12-12 | Aerospatiale Societe Nationale Industrielle | Method for marking an electric cable |
FR2667977B1 (en) * | 1990-10-11 | 1992-12-31 | Aerospatiale | METHOD AND MACHINE FOR MARKING AN ELECTRIC CABLE. |
US5248878A (en) * | 1991-02-25 | 1993-09-28 | Bridgestone Corporation | Golf ball marking method |
DE4134271C1 (en) * | 1991-10-17 | 1992-12-24 | Leonhard Kurz Gmbh & Co, 8510 Fuerth, De | |
US5239158A (en) * | 1992-04-15 | 1993-08-24 | Eaton Corporation | Laser marking of molded hand grips |
FR2691670B1 (en) * | 1992-05-26 | 1994-08-26 | Plastic Omnium Cie | Polytetrafluoroethylene tape suitable for laser marking. |
US5697390A (en) * | 1993-01-29 | 1997-12-16 | Coltec Industries Inc | Process for producing filled polytetrafluoroethylene resin composite materials and products |
US5501827A (en) * | 1993-01-29 | 1996-03-26 | Garlock Inc. | Laser markable polytetrafluoroethylene resin material and method of making |
FR2732030B1 (en) * | 1995-03-20 | 1997-04-30 | Plastic Omnium Cie | COATING METAL BASED ON POLYTETRAFLUOROETHYLENE SUITABLE FOR LASER MARKING. |
JPH09123606A (en) * | 1995-11-02 | 1997-05-13 | Dainippon Printing Co Ltd | Laminate for laser printing and print thereof |
US5853955A (en) * | 1995-12-11 | 1998-12-29 | Mcdonnell Douglas Corp. | Substrates and methods for laser marking same |
JP3766468B2 (en) * | 1996-04-18 | 2006-04-12 | 麒麟麦酒株式会社 | Laser printing media |
DE19812314A1 (en) | 1998-03-20 | 1999-09-23 | Siemens Ag | Cable-sheath for electrical or optical communications cable |
US6370304B1 (en) | 1998-09-28 | 2002-04-09 | Corning Cable Systems Llc | Radiation marking of fiber optic cable components |
US6207902B1 (en) * | 1999-04-01 | 2001-03-27 | Richard J. Balaguer | Electrical wiring cable with color contrast abrasion wear indicator |
AU6402900A (en) * | 1999-06-08 | 2000-12-28 | Biomicro Systems, Inc. | Laser ablation of doped fluorocarbon materials and applications thereof |
JP4465822B2 (en) * | 2000-06-29 | 2010-05-26 | パナソニック株式会社 | Magnet wire soldering method |
WO2002041325A1 (en) | 2000-11-14 | 2002-05-23 | Coltec Industrial Products Inc | Abrasion-resistant polytetrafluoroethylene tape |
US20030215592A1 (en) * | 2002-05-14 | 2003-11-20 | 3M Innovative Properties Company | Imageable multi-wall elastic sleeves |
JP2008026054A (en) * | 2006-07-19 | 2008-02-07 | Seiko Instruments Inc | Tape for displaying discrimination code |
CN100481275C (en) * | 2007-01-24 | 2009-04-22 | 兴宁市金雁电工有限公司 | Production of C-level polyurethane enamelled wire |
US9818508B2 (en) | 2007-11-13 | 2017-11-14 | Southwire Company, Llc | Traceable and theft deterrent reclaimable product |
US10102461B2 (en) | 2007-11-13 | 2018-10-16 | Southwire Company, Llc | Traceable and theft deterrent reclaimable product |
US9040825B2 (en) | 2007-11-13 | 2015-05-26 | Southwire Company, Llc | Conductors and metal-covered cable with coded information and method of applying coded information |
US8234304B2 (en) * | 2007-11-13 | 2012-07-31 | Southwire Company | Traceable and theft deterrent reclaimable product |
US9053841B2 (en) | 2007-11-13 | 2015-06-09 | Southwire Company, Llc | Traceable and theft deterrent reclaimable product |
US7633013B2 (en) * | 2008-03-24 | 2009-12-15 | Nexans | Colored foaming polymer composition |
TW201037035A (en) * | 2009-04-01 | 2010-10-16 | Microcosm Technology Co Ltd | Polyimide film having sheltering property and application thereof and preparation method thereof |
US9800110B2 (en) * | 2012-04-20 | 2017-10-24 | Summit Esp, Llc | System and method for enhanced magnet wire insulation |
JP6043611B2 (en) * | 2012-12-07 | 2016-12-14 | 矢崎総業株式会社 | coaxial cable |
US10770202B1 (en) * | 2013-02-21 | 2020-09-08 | Southwire Company, Llc | Striped cable and process and apparatus for making same |
US10256009B2 (en) | 2014-06-19 | 2019-04-09 | Saint-Gobain Performance Plastics Corporation | Laser-markable insulation material for wire or cable assemblies |
US9881714B2 (en) | 2014-06-19 | 2018-01-30 | Saint-Gobain Performance Plastics Corporation | Laser-markable insulation material for wire or cable assemblies |
CN108780201A (en) * | 2016-02-19 | 2018-11-09 | 通用线缆技术公司 | The cable of laser marking and system for manufacturing it |
CN112272852A (en) * | 2018-07-10 | 2021-01-26 | 布拉尔机电股份公司 | Water-cooled cable and related manufacturing method |
FR3089433B1 (en) * | 2018-12-10 | 2021-11-05 | Exel Ind | Method of forming at least one pattern on a part |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3505916A (en) * | 1968-05-15 | 1970-04-14 | Adolph W Brandt | Spiral striped insulator conductor and spiral striping means |
GB1321540A (en) * | 1970-10-08 | 1973-06-27 | Tokyo Shibaura Electric Co | Current limitting element |
JPS6054727B2 (en) * | 1980-01-31 | 1985-12-02 | 株式会社デンソー | High voltage resistance wire for noise prevention |
DE3162096D1 (en) * | 1980-05-22 | 1984-03-08 | Westland Plc | Cable marking method and apparatus |
DE3147230A1 (en) * | 1981-11-28 | 1983-06-09 | Messerschmitt-Bölkow-Blohm GmbH, 8000 München | Method for applying characters to an elongated object |
FR2555799B1 (en) * | 1983-11-25 | 1987-04-17 | Filotex Sa | ELECTRIC CABLE, ESPECIALLY FOR AEROSPATIAL USE, WITH IMPROVED ELECTRICAL CHARACTERISTICS |
-
1986
- 1986-08-05 FR FR8611319A patent/FR2602904B1/en not_active Expired
-
1987
- 1987-08-04 DE DE8787111246T patent/DE3771283D1/en not_active Expired - Fee Related
- 1987-08-04 ES ES87111246T patent/ES2023153B3/en not_active Expired - Lifetime
- 1987-08-04 EP EP87111246A patent/EP0256422B1/en not_active Expired - Lifetime
- 1987-08-04 CA CA000543712A patent/CA1287133C/en not_active Expired - Fee Related
- 1987-08-05 US US07/081,957 patent/US4808966A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FR2602904B1 (en) | 1989-12-01 |
US4808966A (en) | 1989-02-28 |
FR2602904A1 (en) | 1988-02-19 |
ES2023153B3 (en) | 1992-01-01 |
EP0256422A1 (en) | 1988-02-24 |
CA1287133C (en) | 1991-07-30 |
DE3771283D1 (en) | 1991-08-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0256422B1 (en) | Laser-markable electrical cable | |
US5091284A (en) | Marking fluorocarbon surfaces | |
EP0436221A1 (en) | Laser-markable cable | |
CN1165435C (en) | Thermal transfer element with plasticizer-contg. transfer layer and thermal transfer process | |
CN1190330C (en) | Thermal mass transfer donor element with light-to-heat conversion layer | |
JP5050103B2 (en) | Thermal transfer element for forming multilayer devices | |
US6783915B2 (en) | Thermal transfer of a black matrix containing carbon black | |
US4801501A (en) | Insulated conductor with multi-layer, high temperature insulation | |
MXPA06005649A (en) | Electroluminescent devices and methods of making electroluminescent devices including a color conversion element. | |
EP1144197A1 (en) | Thermal transfer element and process for forming organic electroluminescent devices | |
FR2979032A1 (en) | ELECTRICAL CABLE RESISTANT TO PARTIAL DISCHARGES | |
FR2722330A1 (en) | COAXIAL CABLE | |
FR2617325A1 (en) | Electrical cable, especially for an aircraft | |
US10259202B2 (en) | Fluoropolymer composite film wrapped wires and cables | |
FR2648270A1 (en) | Cable having a laser-markable jacket | |
EP1741749B1 (en) | Ultraviolet laser-markable material based on fluoropolymer | |
EP2808874B1 (en) | Electric cable including at least one electrically insulating layer | |
EP0081154A1 (en) | Tape winding process for primary insulation of conductors | |
FR3087992A1 (en) | HEAT SHRINKABLE SYSTEM | |
BE1028236B1 (en) | Profile and its manufacturing process | |
EP1285747A1 (en) | Multilayered structure, especially for the spinning of electrical cables | |
JPH09293417A (en) | Fluororesin wire with discriminating function and manufacture thereof | |
FR2745417A1 (en) | PROCESS AND PLANT FOR MANUFACTURING INSULATED ELECTRIC CABLES WITH THIN COATING | |
WO2018109339A1 (en) | Method and facility for painting a motor vehicle part by means of a heating primer | |
FR2678391A1 (en) | Method of locally depositing a material by thermooptical printing and application of this method to the manufacture of colour filters |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE CH DE ES FR GB IT LI LU NL |
|
17P | Request for examination filed |
Effective date: 19880817 |
|
17Q | First examination report despatched |
Effective date: 19891229 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE CH DE ES FR GB IT LI LU NL |
|
REF | Corresponds to: |
Ref document number: 3771283 Country of ref document: DE Date of ref document: 19910814 |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
ITF | It: translation for a ep patent filed |
Owner name: JACOBACCI & PERANI S.P.A. |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2023153 Country of ref document: ES Kind code of ref document: B3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
EPTA | Lu: last paid annual fee | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 19970805 Year of fee payment: 11 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980804 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19990713 Year of fee payment: 13 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19990719 Year of fee payment: 13 Ref country code: CH Payment date: 19990719 Year of fee payment: 13 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19990722 Year of fee payment: 13 Ref country code: DE Payment date: 19990722 Year of fee payment: 13 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 19990817 Year of fee payment: 13 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 19990818 Year of fee payment: 13 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000804 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000805 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000831 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000831 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000831 |
|
BERE | Be: lapsed |
Owner name: FILOTEX Effective date: 20000831 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010301 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20000804 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010430 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20010301 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010501 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20010911 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050804 |