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FR2614575A1 - Method of manufacturing thermally shaped sheets with multicoloured bands - Google Patents

Method of manufacturing thermally shaped sheets with multicoloured bands Download PDF

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Publication number
FR2614575A1
FR2614575A1 FR8712561A FR8712561A FR2614575A1 FR 2614575 A1 FR2614575 A1 FR 2614575A1 FR 8712561 A FR8712561 A FR 8712561A FR 8712561 A FR8712561 A FR 8712561A FR 2614575 A1 FR2614575 A1 FR 2614575A1
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France
Prior art keywords
layer
strip
thickness
bands
colored
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR8712561A
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French (fr)
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FR2614575B1 (en
Inventor
Jose Luis Santamaria Lopez
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COEXPAN SA
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COEXPAN SA
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Publication date
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Publication of FR2614575A1 publication Critical patent/FR2614575A1/en
Application granted granted Critical
Publication of FR2614575B1 publication Critical patent/FR2614575B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/19—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their edges
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • B29C48/307—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets specially adapted for bringing together components, e.g. melts within the die
    • 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
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/685—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks by laminating inserts between two plastic films or plates
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • 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
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • 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
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/002—Coloured

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

Method of manufacturing thermally shaped bands of the type constituted by a layer of base material on which lie coloured bands of longitudinal shape and of width and thickness which are either identical or different, and on which bands is superposed a layer of transparent and shiny plastic; the method includes, in the first place, the melting and extrusion of the starting plastic through as many extruders as there are types of materials used that differ by their colours and their properties, and the molten plastic is transported by extrusion to the die for shaping the final band. The molten plastics coming from the extruders reach a first plate which distributes them through separate horizontal channels; for the shaping into bands, the coloured materials pass into a comb-shaped shaping die and then are combined with the base material and the top transparent plastic into a single zone.

Description

La présente invention se réfère à un procédé de fabrication de feuilles avec des bandes multicolores de matière thermoplastique qui présente une série d'avantages très importants par rapport aux techniques les plus modernes actuellement utilisées et développées dans ledit domaine industriel. The present invention relates to a process for manufacturing sheets with multicolored strips of thermoplastic material which has a series of very important advantages compared to the most modern techniques currently used and developed in said industrial field.

Dans la pratique actuelle, il existe une méthode ou un procédé décrit dans la demande de brevet français n0 85 15621 qui définit une méthode particulière d'obtention de feuilles décorées et qui présente certains problèmes dans sa réalisation pratique dus au fluage de certaines couches de plastique vis-à-vis des autres, provoquant la migration des bandes situées au-dessus des autres lorsque des couleurs distinctes de bandes sont utilisées. In current practice, there is a method or process described in French patent application No. 85 15621 which defines a particular method for obtaining decorated sheets and which presents certain problems in its practical implementation due to the creep of certain layers of plastic. vis-à-vis the others, causing the migration of the bands situated above the others when distinct colors of bands are used.

La présente invention a donc pour objet la fabrication des feuilles thermoconformées avec une grande sécurité et une grande qualité de fabrication, malgré les conditions variables d'extrusion ou de thermoconformation qui seraient critiques pour d'autres procédés utilisés. The present invention therefore relates to the manufacture of thermoformed sheets with great safety and high manufacturing quality, despite the variable conditions of extrusion or thermoconformation which would be critical for other processes used.

Le produit final obtenu consiste en une couche de base de matière plastique sur laquelle se trouvent des bandes longitudinales de largeurs distinctes, sur lesquelles se trouve une couche supérieure de matière plastique transparente et brillante. The final product obtained consists of a base layer of plastic material on which there are longitudinal strips of different widths, on which is an upper layer of transparent and shiny plastic material.

Les phases du procédé objet de l'invention sont les suivantes :
en premier Lieu, la fusion et l'extrusion de la matière thermoplastique dans autant d'extrudeuses que de types distincts et de couleurs de matières plastiques utilisées, ctest-à-dire s'il y a une couche de base, six couches intermédiaires colorées et une couche supérieure de matière plastique transparente, 8 extrudeuses seront utilisées, c'est-à-dire une pour chaque type de matière plastique utilisée. La matière plastique la plus communément utilisée en raison de ses grandes qualités et caractéristiques sera le polystyrène qui, sous la forme de matière première, possède les caractéristiques fondamentales pour sa configuration et sa coloration. The phases of the process which is the subject of the invention are as follows:
first, the melting and extrusion of the thermoplastic material in as many extruders as there are distinct types and colors of plastics used, i.e. if there is a base layer, six colored intermediate layers and an upper layer of transparent plastic, 8 extruders will be used, i.e. one for each type of plastic used. The most commonly used plastic because of its great qualities and characteristics will be polystyrene which, in the form of raw material, has the fundamental characteristics for its configuration and coloring.

Cette matière plastique se ramollit à partir de 900 ou
o 100 C, température à laquelle elle commence à se déformer jusqu'à une température supérieure jusqu'à atteindre un niveau constant préconisé dans ledit procédé d'environ 210 Oc, et variant entre les limites de 1900 à 3000C dans La tête de formation des feuilles.This plastic material softens from 900 or
o 100 C, temperature at which it begins to deform up to a higher temperature until reaching a constant level recommended in said process of about 210 Oc, and varying between the limits of 1900 to 3000 C in The formation head of leaves.

Toutes ces matières plastiques fondues provenant des extrudeuses atteignent une première plaque qui les distribue à travers des canaux horizontaux séparés, véhiculant chacun l'une des matières plastiques. A partir de cette plaque, un autre distributeur qui, compte tenu de la situation requise dans la bande conformée de l'une ou de l'autre couleur, les distribue à ladite hauteur à travers un conduit qui centre la couleur désirée pour atteindre finalement une disposition centrale des couleurs désirées, extractibles par les conduits correspondants.Pour la conformation en bandes, ces conduits de transport des couleurs distinctes sont réalisés pour atteindre une pièce en forme de peigne dans laquelle la matière plastique s'écoule à travers des portions triangulaires du vertex à la portion de sortie dans laquelle elle est simultanément réunie avec les autres bandes latérales.En même temps, la matière de base et la matière plastique transparente supérieure sont distribuées à travers les conduits inférieur et supérieur respectivement, la première d'entre elles étant envoyée à travers la zone inférieure de la tête et la seconde à travers la partie supérieure, jusqu'au seul point de réunion -avec les bandes colorées intermédiaires où toutes sont réunies dans la même zone, grâce å quoi, malgré le fait de posséder des fluidités, des propriétés physiques ou des pressions distinctes, ces caractéristiques sont équilibrées, sans déviation ni migration de matières d'une bande à l'autre, ni d'une couche à l'autre en raison de la réunion de la totalité des bandes en un même point de la tête. All of these molten plastics from the extruders reach a first plate which distributes them through separate horizontal channels, each conveying one of the plastics. From this plate, another distributor which, taking into account the situation required in the shaped strip of one or the other color, distributes them at said height through a conduit which centers the desired color to finally reach a central arrangement of the desired colors, extractable by the corresponding conduits. For the conformation in strips, these transport conduits of the different colors are made to reach a comb-shaped part in which the plastic material flows through triangular portions of the vertex to the outlet portion in which it is simultaneously joined with the other side bands. At the same time, the base material and the upper transparent plastic material are distributed through the lower and upper conduits respectively, the first of them being sent through the lower area of the head and the second through the upper part, up to the single meeting point -with the intermediate colored bands where all are united in the same zone, thanks to which, despite having different fluidities, physical properties or pressures, these characteristics are balanced, without deviation or migration of materials from one band to the other 'other, nor from one layer to another due to the union of all the bands at one point of the head.

L'épaisseur des bandes est réglée par l'écoulement de la matière plastique au niveau de la tête, un faible écoulement conduisant à la form#ation d'une bande fine et un écoulement supérieur conduisant å la formation d'une bande plus épaisse.  The thickness of the strips is controlled by the flow of the plastic material at the head, a small flow leading to the formation of a thin strip and a higher flow leading to the formation of a thicker strip.

La justification de cette variation d'épaisseur de la bande colorée intermédiaire est basée sur le fait que l'on conforme les vaisseaux provenant de cette plaque, et si une bande de faible épaisseur est utilisée dans une couleur intense, la sensation de faiblesse sera donnée du fait de son contenu interne et car sa couche de support est blanche, et elle deviendrait transparente en raison de cette faible épaisseur de la bande colorée, ce qui explique pourquoi dans les couleurs intenses, une épaisseur de la bande colorée intermédiaire est habituellement un peu plus grande que dans les couleurs faibles. The justification for this variation in thickness of the intermediate colored strip is based on the fact that the vessels coming from this plate are conformed, and if a thin strip is used in an intense color, the feeling of weakness will be given. because of its internal content and because its support layer is white, and it would become transparent due to this small thickness of the colored strip, which is why in intense colors, a thickness of the intermediate colored strip is usually a little larger than in weak colors.

La largeur des bandes est réglée par la pièce en forme de peignes triangulaires et selon la largeur de sa portion de sortie terminale, la mise en dimension de la feuille en bandes sera plus ou moins large. The width of the strips is adjusted by the piece in the form of triangular combs and according to the width of its terminal outlet portion, the dimensioning of the sheet in strips will be more or less wide.

L'épaisseur totale de la feuille thermoconformée est réglée à sa sortie par déformation de la lèvre de sortie de la pièce de matrice ou de la filière de conformation par réglage de l'étranglement de l'épaisseur à sa sortie et la bande une fois réalisée aura une largeur totale délimitée par la filière utilisée et sa largeur sera fixe pour chaque filière alors que l'épaisseur totale de la feuille peut varier entre 0,6 et 2,4 mm et correspond aux proportions des éléments de configuration en pourcentage d'épaisseur de
- 3,5 à 6 X pour la couche supérieure transparente bril
lante,
- 40 à 60 X d'épaisseur pour les bandes colorées, et
- 56,5 à 34 X d'épaisseur pour la matière de base.The total thickness of the thermoformed sheet is adjusted at its exit by deformation of the exit lip of the die part or of the shaping die by adjusting the throttling of the thickness at its exit and the strip once produced will have a total width delimited by the die used and its width will be fixed for each die while the total thickness of the sheet may vary between 0.6 and 2.4 mm and corresponds to the proportions of the configuration elements in percentage of thickness of
- 3.5 to 6 X for the transparent top layer bril
lante,
- 40 to 60 X thick for the colored bands, and
- 56.5 to 34 X thick for the base material.

La vitesse de formation de ces feuilles est de préférence de 7 à Il m/min, une configuration de ces feuilles dans une forme stable et correcte étant obtenue avec ses valeurs, cette vitesse de sortie étant obtenue par adaptation des extrudeuses pour effectuer cette impulsion de la matière plastique dans sa configuration. The speed of formation of these sheets is preferably from 7 to 11 m / min, a configuration of these sheets in a stable and correct form being obtained with its values, this speed of exit being obtained by adaptation of the extruders to effect this pulse of the plastic in its configuration.

A la sortie de la tête ou de la filière de configuration, cette feuille passe entre les rouleaux de refroidissement, maintenus à une température constante par un refroidissement interne par de l'eau, et à la sortie desdits rouleaux est collectée par embobinage en bobines i cylindriques..  At the outlet of the head or of the configuration die, this sheet passes between the cooling rollers, kept at a constant temperature by internal cooling by water, and at the outlet of said rollers is collected by reeling in coils i cylindrical ..

Comme opération finale de ce procédé, le refendage longitudinal est effectué au moyen d'une découpeuse qui possède la particularité de déceler la séparation des couteurs au moyen de
L'emploi de cellules photoélectriques qui commandent la découpeuse.As a final operation of this process, the longitudinal slitting is carried out by means of a cutting machine which has the particularity of detecting the separation of the cutters by means of
The use of photoelectric cells which control the cutting machine.

Par ailleurs, la largeur des bandes que possèdent les feuilles peut varier entre 3 et 600 mm, cette variation étant produite par la configuration de la pièce dans la forme de peigne intermédiaire.  Furthermore, the width of the strips that the sheets have can vary between 3 and 600 mm, this variation being produced by the configuration of the part in the form of an intermediate comb.

Claims (10)

REVENDICATIONS 1. Un procédé de fabrication de bandes thermoconformées du type constitué par une couche de matière de base sur laquelle se trouvent des bandes colorées de forme longitudinale, de largeur et d'épaisseur identiques ou différentes, et sur lesquelles est superposée une couche de matière plastique transparente et brillante, caractérisé en ce que ledit procédé comporte en premier lieu la fusion et l'extrusion de la matière plastique de départ à travers autant d'extrudeuses que de types de matières utilisées, différentes par leurs couleurs et par leurs caractéristiques, ladite matière plastique fondue étant transportée par extrusion jusqu'à la filière de conformation de la bande terminale. 1. A method of manufacturing thermoformed strips of the type consisting of a layer of base material on which there are colored strips of longitudinal shape, of identical or different width and thickness, and on which a layer of plastic material is superimposed transparent and shiny, characterized in that said process comprises first of all the melting and extrusion of the starting plastic material through as many extruders as there are types of materials used, different in their colors and in their characteristics, said material molten plastic being transported by extrusion to the shaping die of the terminal strip. 2. Le procédé selon la revendication 1, caractérisé en ce que la conformation de la filière placée à l'entrée de la matière plastique fondue est telle que chaque bande est disposée dans des canaux longitudinaux et à partir de chacun d'eux est extraite la matière plastique désirée, ou la matière colorée désirée, à la hauteur désirée, pour la conformation de la bande finale avec la couleur désirée. 2. The method according to claim 1, characterized in that the shape of the die placed at the inlet of the molten plastic material is such that each strip is arranged in longitudinal channels and from each of them is extracted the desired plastic material, or the desired colored material, at the desired height, for the conformation of the final strip with the desired color. 3. Le procédé selon la revendication 1 ou 2, caractérisé en ce que la configuration de la couche longitudinale est obtenue par passage des différentes matières colorées dans une partie intermédiaire d'une filière de conformation en forme de peigne qui réunit à son extrémité les bandes latérales les unes aux autres. 3. The method according to claim 1 or 2, characterized in that the configuration of the longitudinal layer is obtained by passing the various colored materials through an intermediate part of a comb-shaped shaping die which joins at its end the strips side to side. 4. Le procédé selon l'une des revendications 1 à 3, carac térisé en ce que sur la même ligne, les couches centrales colorées sont réunies à la couche inférieure de base et à la couche supérieure transparente pour constituer à la sortie un corps monobloc dont l'épaisseur totale est ajustée par la déformation de la lèvre de sortie de la portion de matrice. 4. The method according to one of claims 1 to 3, charac terized in that on the same line, the colored central layers are joined to the lower base layer and to the transparent upper layer to form at the outlet a one-piece body whose total thickness is adjusted by the deformation of the exit lip of the die portion. 5. Le procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'épaisseur des couches colorées centrales longitudinales est ajustée par le réglage de l'étrangle- ment du courant d'alimentation de matière plastique au niveau des canaux de formation des différentes couches. 5. The method according to any one of claims 1 to 4, characterized in that the thickness of the longitudinal central colored layers is adjusted by adjusting the constriction of the plastic feed stream at the channels of formation of the different layers. 6 Le procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la bande conformée, à sa sortie, passe entre les rouleaux de refroidissement maintenus à une température constante par circulation d'eau. 6 The method according to any one of claims 1 to 5, characterized in that the shaped strip, at its outlet, passes between the cooling rollers maintained at a constant temperature by circulation of water. 7. Le procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que I1 épaisseur totale de la bande obtenue. 7. The method according to any one of claims 1 to 6, characterized in that I1 total thickness of the strip obtained. varie entre 0,6 et 2,4 mm.varies between 0.6 and 2.4 mm. 8. Le procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'épaisseur de la bande obtenue varie entre les pourcentages d'épaisseur suivants 8. The method according to any one of claims 1 to 7, characterized in that the thickness of the strip obtained varies between the following percentages of thickness - 3,5 à 6 X pour la couche supérieure brillante, - 3.5 to 6 X for the glossy top layer, - 40 à 60 % pour les couches colorées centrales, et - 40 to 60% for the central colored layers, and - 56,5 à 34 % pour la couche inférieure de base. - 56.5 to 34% for the base base layer. 9. Le procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la largeur de bande varie entre 3 et 600 mm. 9. The method according to any one of claims 1 to 8, characterized in that the strip width varies between 3 and 600 mm. 10. Le procédé selon l'une quelconque des revendications 1 à 9, caractérisé en ce que la température de mise en oeuvre du procédé est comprise dans la filière de conformation entre une limite inférieure de 1900 et une limite supérieure de 3000C.  10. The method according to any one of claims 1 to 9, characterized in that the temperature for implementing the method is included in the shaping die between a lower limit of 1900 and an upper limit of 3000C.
FR878712561A 1987-04-29 1987-09-10 PROCESS FOR PRODUCING THERMOCONFORMED SHEETS WITH MULTI-COLORED STRIPS Expired - Lifetime FR2614575B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES8701269A ES2007340A6 (en) 1987-04-29 1987-04-29 Fabrication process for thermoplastic sheets/panels

Publications (2)

Publication Number Publication Date
FR2614575A1 true FR2614575A1 (en) 1988-11-04
FR2614575B1 FR2614575B1 (en) 1992-07-31

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BE (1) BE1000817A6 (en)
BR (1) BR8704712A (en)
DE (1) DE3730452A1 (en)
ES (1) ES2007340A6 (en)
FR (1) FR2614575B1 (en)
IT (1) IT1223300B (en)
LU (1) LU86993A1 (en)
NL (1) NL8702162A (en)

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FR2614575B1 (en) 1992-07-31
IT1223300B (en) 1990-09-19
BE1000817A6 (en) 1989-04-11
IT8721871A0 (en) 1987-09-10
NL8702162A (en) 1988-11-16
LU86993A1 (en) 1988-02-02
DE3730452A1 (en) 1988-11-10
BR8704712A (en) 1988-11-16
ES2007340A6 (en) 1989-06-16

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