EP0513155B1 - Decorative sheets used mainly for panel manufacturing comprising metallic particles or metallized flakes - Google Patents

Decorative sheets used mainly for panel manufacturing comprising metallic particles or metallized flakes Download PDF

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Publication number
EP0513155B1
EP0513155B1 EP19910903889 EP91903889A EP0513155B1 EP 0513155 B1 EP0513155 B1 EP 0513155B1 EP 19910903889 EP19910903889 EP 19910903889 EP 91903889 A EP91903889 A EP 91903889A EP 0513155 B1 EP0513155 B1 EP 0513155B1
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EP
European Patent Office
Prior art keywords
sheet
fact
sheet according
metallized
flakes
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EP19910903889
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German (de)
French (fr)
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EP0513155A1 (en
Inventor
Claude Perrin
Gilles Clerc
François Rivat
Philippe Ferrand
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ArjoWiggins SAS
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ArjoWiggins SAS
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Priority to AT91903889T priority Critical patent/ATE99604T1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B44C5/0469—Ornamental plaques, e.g. decorative panels, decorative veneers comprising a decorative sheet and a core formed by one or more resin impregnated sheets of paper
    • B44C5/0484—Ornamental plaques, e.g. decorative panels, decorative veneers comprising a decorative sheet and a core formed by one or more resin impregnated sheets of paper containing metallic elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F1/00—Designs or pictures characterised by special or unusual light effects
    • B44F1/08—Designs or pictures characterised by special or unusual light effects characterised by colour effects
    • B44F1/14—Iridescent effects

Definitions

  • the invention relates to a decorative sheet usable for example for the manufacture of laminated panels, this sheet comprising metallic particles or metallized flakes.
  • This sheet can also be an overlay sheet.
  • the invention further relates to a composition for printing such a decorative sheet.
  • laminates have been used as materials in homes and commercial and industrial premises. Typical applications of such laminates are the surface coating of walls, table tops, furniture and the like.
  • the so-called high pressure laminates are produced from a core consisting of sheets impregnated with resin.
  • the sheets are generally sheets of kraft paper which has been impregnated with a thermosetting resin and more particularly with a phenolic resin.
  • the sheets are dried, cut, then stacked on top of each other.
  • the number of sheets in the stack depends on the applications and can vary between 3 and 9, but can be higher.
  • a decorative sheet which is generally a sheet of paper bearing a printed or light-colored pattern, and impregnated with a thermosetting resin which does not blacken with heat, for example melamine-formaldehyde resins, benzoguanamine-formaldehyde resins, unsaturated polyester resins.
  • a protective cover sheet without a pattern and transparent in the laminate, is placed above the decorative sheet. final.
  • this protective sheet is called "over-lay”.
  • This overlay sheet is traditionally made by draining an aqueous suspension of unrefined cellulose fibers.
  • the stack of impregnated sheets is then placed in a press fitted with a sheet giving the surface condition. Then, the stack is densified by heating and pressing to obtain a unitary structure.
  • thermosetting resins are transformed into thermosetting form and an extremely hard material with a decorative effect is obtained.
  • So-called low pressure laminates are produced in a similar manner to that of high pressure laminates, but the decorative sheet is laminated directly on a particle board or any other basic support.
  • the decorative sheet is traditionally made in the following manner.
  • a sheet of paper is made by draining on a flat canvas an aqueous suspension of cellulose fibers, long and / or short, bleached, fillers, retention agents, binders.
  • the sheet thus formed is drained, pressed and dried to form a sheet of paper.
  • This sheet is then printed.
  • the impression usually made is a gravure printing, by means of engraved rollers.
  • the engraving technique consists in making a drawing, for example reproducing a wood or a purely fancy artistic drawing.
  • one to three separate and successive prints are made using one to three rollers.
  • Decorative sheets for laminate panels are already known which are printed using iridescent mineral pigments.
  • the decorative sheets have different colors depending on the viewing angle. Such sheets have been described in the French patent of the applicant FR-A-2,442,719.
  • the brightening agent consists of powder coated with titanium oxide.
  • This powder can for example be a metallic powder, mica, mother-of-pearl.
  • This brightening agent has a particle diameter of 10 to 60 micrometers. It is mentioned that if the particle size is greater than 60 micrometers, the micas suspended in the binder will tend to precipitate.
  • the surface of the powder is coated with titanium oxide by melting the titanium oxide.
  • the papers obtained according to this Japanese application therefore include relatively expensive products because they are not easy to obtain because of their small particle size which requires significant processing.
  • the method of coating by fusion of titanium oxide is not easy to implement.
  • DOW CHEMICAL British patent GB-1 107 341 describes a paper intimately containing a large number of iridescent plastic particles made up of several parallel layers of thermoplastic resins, two adjacent layers having different refractive indices. It is a decorative paper that is not specifically intended for laminates; it is neither mentioned that the particles are especially resistant to heat, solvents and light nor that it is possible to put a protective sheet without attenuating the iridescent effect.
  • the effects obtained with powders are uniform because the particles are spherical and of small particle size.
  • the powders according to the prior art due to their spherical shape and their small particle size have the disadvantages of settling easily and having a low covering power.
  • the particles are also subjected to high temperatures, of the order of about 160 ° C., during the stratification of the sheets.
  • laminates when in use, are often exposed to visible or artificial light for extended periods of time.
  • the applicant has described in French patent application FR-A-89 05541 a sheet intended to be subjected to the prolonged action of light, having a first shade with visible light of wavelength between 400 and 800 nanometers and a second shade different from the first, in artificial light with a wavelength less than 400 nanometers and greater than 800 nanometers; this print comprises at least one luminescent pigment.
  • the invention aims to overcome these drawbacks.
  • a first object of the invention is to provide a sheet usable for laminates, this sheet having metallic effects of various sizes, colors and shapes which can be chosen according to the desired decorative effects.
  • a second object of the invention is therefore to use shiny particles having a covering power greater than the powders usually used and difficult to settle.
  • a third object of the invention is to introduce the particles, either in bulk into the sheet, during its manufacture by a papermaking process for example, or by printing the sheet with an ink containing the particles, a binder and a solvent. of the binder. This is why it must be possible to use these particles in an aqueous medium and / or in a non-aqueous solvent medium; they must be non-reactive with the medium chosen.
  • a fourth object of the invention is to deposit the particles during the impregnation of thermosetting resin, this deposit being regular and homogeneous.
  • a fifth object of the invention is to obtain prints resistant to visible or non-visible light.
  • One means of the invention is to use metallic particles, or metallized flakes, which are resistant to water and / or to non-aqueous solvents, to heat and to visible or non-visible light.
  • particles obtained by cutting thin sheets can be used according to the invention. They can have very varied geometric shapes, for example a hexagon, rectangle, square, star shape. They can also have various sizes. The shinier effect will be better the larger the size.
  • the largest dimension of the metallized flakes is greater than 80 micrometers, more preferably at least equal to 100 micrometers.
  • the sheet made according to the invention could be used as a base sheet for carrying out the printing comprising luminescent pigments.
  • the invention provides a laminate sheet having a metallic effect decoration characterized in that it comprises metallic particles or metallized flakes which are not sensitive to water, resistant at least to a temperature of 100 ° C. and resistant to light, said particles or flakes being coated with a protective layer of varnish.
  • the metallized flakes used for the invention can be obtained by cutting a metallized plastic film.
  • the metal layer can be covered with a protective layer of varnish.
  • the metal used is preferably aluminum.
  • the film is preferably polyester.
  • the metal particles can also be obtained by cutting a highly polished aluminum sheet also covered with a protective layer of varnish.
  • This protective layer is preferably a varnish based on epoxy resin.
  • the sequins can have metallic tones, for example gold, silver, and be of a single or multicolored color.
  • These particles have a thickness of about ten micrometers; their shapes and sizes are varied.
  • the sheet used according to the invention is preferably based on cellulose fibers. It is possibly colored. It can contain non-cellulosic fibers, for example polyolefin fibers, polyester fibers.
  • the invention provides a laminate sheet, having a metallic effect decoration, for which said particles metallic or metallized can be incorporated during its manufacture.
  • the glitter can be added to the aqueous suspension containing the cellulose fibers, the mixture is then drained on a canvas, the sheet obtained is then pressed between cylinders and then dried.
  • the flakes or particles can be deposited during the impregnation of the sheet with a thermosetting resin by dusting or spraying when the impregnating resin is still liquid and therefore not thermoset.
  • the invention also provides a laminate sheet having a metallic effect for which the metallic particles or metallized flakes are applied to the sheet by heliographic printing of an ink containing said particles.
  • the sheets produced according to the invention can be impregnated with a thermosetting resin.
  • the invention also provides laminates comprising a decorative sheet having a metallic effect decoration due to metallic or metallized particles not sensitive to aqueous or non-aqueous solvents, resistant to temperatures above 100 ° C and resistant to light and comprising possibly a protective overlay sheet.
  • the invention also makes it possible to supply laminates comprising a decorative sheet having a metallic effect decoration comprising the metallic particles, metallized previously mentioned, this sheet being covered with an overlay sheet to protect it and which would also be decorated with previously mentioned particles. .
  • Another high pressure laminate is produced with the decorative sheet obtained according to Example 1 by adding to this sheet a 28 g / m2 overlay sheet impregnated with melamine resin.
  • the metallized particles chosen as well as the ink produced make it possible to manufacture a decorative sheet whose effect decorative metal is not attenuated by the presence of a protective overlay; the particles withstood the operating conditions well.
  • An overlay sheet according to the invention is produced. To an aqueous suspension of cellulose fibers, 15% by dry weight, based on the fibers, of flakes of polyester sheet metallized with aluminum and covered with an epoxy varnish is added. These sequins are multicolored.
  • the mixture is then used on a paper machine to form a sheet having a weight of 60 g / m2.
  • Example 1 a high pressure laminate is produced according to the technique described in Example 1 using a plain decor sheet of black color and the overlay sheet produced as above.
  • a laminate having a metallic effect is obtained.
  • This laminate is resistant to abrasion, the particles have a good resistance.
  • the pH is adjusted to 7 using sodium carbonate or calcium.
  • the sheet of paper is formed and dried. It is impregnated with a melamine formaldehyde resin.
  • a melamine formaldehyde resin We laminate as in the previous examples, with or without overlay.
  • a panel is obtained having the appearance of a metallic paint. This metallic appearance is as intense for the panel with overlay as for the panel without overlay.
  • a sheet is produced as in Example 5 but this sheet is printed after having dried it, to make a marble decoration. We impregnate and laminate as before.

Landscapes

  • Laminated Bodies (AREA)

Abstract

A sheet for a laminated material having a metallized or iridescent decoration and comprising metal, metallized or iridescent particles which are sensitive to aqueous or non-aqueous solvents, resistant to temperatures above 100 °C, and light-fast. The metallized particles are obtained for example by cutting a plastic film metallized with aluminium and covered with a protective layer. The laminated material may comprise a protective overlay sheet. Uses include panel manufacturing, particularly for household furniture.

Description

L'invention concerne une feuille décorative utilisable par exemple pour la fabrication de panneaux stratifiés, cette feuille comportant des particules métalliques ou des paillettes métallisées. Cette feuille peut aussi être une feuille overlay. L'invention concerne en outre une composition pour imprimer une telle feuille décorative.The invention relates to a decorative sheet usable for example for the manufacture of laminated panels, this sheet comprising metallic particles or metallized flakes. This sheet can also be an overlay sheet. The invention further relates to a composition for printing such a decorative sheet.

On sait qu'il existe principalement deux sortes de panneaux stratifiés : les panneaux dits haute pression et les panneaux dits basse pression.We know that there are mainly two kinds of laminated panels: so-called high pressure panels and so-called low pressure panels.

Depuis de nombreuses années, on emploie des stratifiés comme matériaux dans les habitations et les locaux commerciaux et industriels. Des applications typiques de tels stratifiés sont le revêtement superficiel des murs, des dessus de table, des meubles et autres.For many years, laminates have been used as materials in homes and commercial and industrial premises. Typical applications of such laminates are the surface coating of walls, table tops, furniture and the like.

On produit les stratifiés dits haute pression à partir d'une âme constituée de feuilles imprégnées de résine. Les feuilles sont généralement des feuilles de papier kraft qui a été imprégné d'une résine thermodurcissable et plus particulièrement d'une résine phénolique.The so-called high pressure laminates are produced from a core consisting of sheets impregnated with resin. The sheets are generally sheets of kraft paper which has been impregnated with a thermosetting resin and more particularly with a phenolic resin.

Lorsque le papier kraft a été imprégné de résine, on sèche les feuilles, on les découpe, puis on les empile les unes sur les autres. Le nombre des feuilles de la pile dépend des applications et peut varier entre 3 et 9, mais peut être supérieur.When the kraft paper has been impregnated with resin, the sheets are dried, cut, then stacked on top of each other. The number of sheets in the stack depends on the applications and can vary between 3 and 9, but can be higher.

On place ensuite sur la pile de feuilles constituant l'âme, une feuille décorative qui est en général une feuille de papier portant un motif imprimé ou de couleur claire, et imprégnée d'une résine thermodurcissable ne noircissant pas à la chaleur, par exemple des résines de mélamine-formaldéhyde, des résines de benzoguanamine-formaldéhyde, des résines de polyester insaturé. En général, on place au-dessus de la feuille décorative, une feuille protectrice de recouvrement, dépourvue de motif et transparente dans le stratifié final. En termes de métier, cette feuille protectrice est appelée "over-lay". Cette feuille overlay est traditionnellement fabriquée par égouttage d'une suspension aqueuse de fibres de cellulose peu raffinées. On place ensuite la pile de feuilles imprégnées dans une presse munie d'une tôle conférant l'état de surface. Puis, on densifie la pile par chauffage et pressage pour obtenir une structure unitaire.Then placed on the pile of sheets constituting the core, a decorative sheet which is generally a sheet of paper bearing a printed or light-colored pattern, and impregnated with a thermosetting resin which does not blacken with heat, for example melamine-formaldehyde resins, benzoguanamine-formaldehyde resins, unsaturated polyester resins. In general, a protective cover sheet, without a pattern and transparent in the laminate, is placed above the decorative sheet. final. In terms of profession, this protective sheet is called "over-lay". This overlay sheet is traditionally made by draining an aqueous suspension of unrefined cellulose fibers. The stack of impregnated sheets is then placed in a press fitted with a sheet giving the surface condition. Then, the stack is densified by heating and pressing to obtain a unitary structure.

Pendant la densification, les résines thermodurcissables sont transformées en forme thermodurcie et on obtient une matière extrêmement dure et ayant un effet décoratif.During densification, the thermosetting resins are transformed into thermosetting form and an extremely hard material with a decorative effect is obtained.

On produit des stratifiés dits basse pression de façon similaire à celle des stratifiés haute pression, mais on effectue la stratification de la feuille décorative directement sur un panneau de particules de bois ou tout autre support de base.So-called low pressure laminates are produced in a similar manner to that of high pressure laminates, but the decorative sheet is laminated directly on a particle board or any other basic support.

La feuille décorative est traditionnellement fabriquée de la manière suivante. On fabrique une feuille de papier en égouttant sur une toile plate une suspension aqueuse de fibres de cellulose, longues et/ou courtes, blanchies, de charges, d'agents de rétention, de liants. La feuille ainsi formée est égouttée, pressée et séchée pour former une feuille de papier. Cette feuille est ensuite imprimée. L'impression faite habituellement est une impression par héliogravure, au moyen de rouleaux gravés. La technique de gravure consiste à effectuer un dessin, par exemple reproduisant un bois ou un dessin artistique purement de fantaisie. Puis on prend la photographie de ce dessin et à partir des films obtenus, on grave un ou plusieurs rouleaux d'impression. Chaque cylindre passe ensuite dans un bain d'encre, et les creux ou empreintes gravés dans le cylindre se remplissent d'encre qui est ensuite reportée sur le papier. On effectue en général de une à trois impressions distinctes et successives à l'aide de un à trois rouleaux.The decorative sheet is traditionally made in the following manner. A sheet of paper is made by draining on a flat canvas an aqueous suspension of cellulose fibers, long and / or short, bleached, fillers, retention agents, binders. The sheet thus formed is drained, pressed and dried to form a sheet of paper. This sheet is then printed. The impression usually made is a gravure printing, by means of engraved rollers. The engraving technique consists in making a drawing, for example reproducing a wood or a purely fancy artistic drawing. Then we take the photograph of this drawing and from the films obtained, we engrave one or more printing rollers. Each cylinder then passes through an ink bath, and the indentations or imprints engraved in the cylinder are filled with ink which is then transferred to the paper. Generally one to three separate and successive prints are made using one to three rollers.

On connaît déjà des feuilles décoratives pour panneaux stratifiés qui sont imprimées à l'aide de pigments minéraux iridescents. Les feuilles décoratives présentent des couleurs variées en fonction de l'angle d'observation. De telles feuilles ont été décrites dans le brevet français de la demanderesse FR-A-2 442 719.Decorative sheets for laminate panels are already known which are printed using iridescent mineral pigments. The decorative sheets have different colors depending on the viewing angle. Such sheets have been described in the French patent of the applicant FR-A-2,442,719.

On a décrit dans la demande JP-A-63 084 936, déposée par IBIDEN, la fabrication de panneaux stratifiés haute pression qui comportent un overlay imprimé avec une encre contenant un agent brillant et un liant qui est une résine mélamine. L'agent brillant est constitué de poudre revêtue d'oxyde de titane. Cette poudre peut par exemple être une poudre métallique, du mica, de la nacre. Cet agent brillant a un diamètre de particules de 10 à 60 micromètres. Il est mentionné que si la granulométrie est supérieure à 60 micromètres, les micas suspendus dans le liant auront tendance à précipiter. La surface de la poudre est revêtue d'oxyde de titane par fusion de l'oxyde de titane. Les papiers obtenus selon cette demande japonaise comprennent donc des produits relativement chers car ils sont peu faciles à obtenir du fait de leur faible granulométrie qui nécessite une mise en oeuvre importante. De plus, le procédé de revêtement par fusion de l'oxyde de titane n'est pas facile à mettre en oeuvre.There has been described in application JP-A-63 084 936, filed by IBIDEN, the manufacture of high pressure laminate panels which comprise an overlay printed with an ink containing a gloss agent and a binder which is a melamine resin. The brightening agent consists of powder coated with titanium oxide. This powder can for example be a metallic powder, mica, mother-of-pearl. This brightening agent has a particle diameter of 10 to 60 micrometers. It is mentioned that if the particle size is greater than 60 micrometers, the micas suspended in the binder will tend to precipitate. The surface of the powder is coated with titanium oxide by melting the titanium oxide. The papers obtained according to this Japanese application therefore include relatively expensive products because they are not easy to obtain because of their small particle size which requires significant processing. In addition, the method of coating by fusion of titanium oxide is not easy to implement.

Le brevet anglais GB-1 107 341 de DOW CHEMICAL décrit un papier contenant intimement un grand nombre de particules en plastique irisé constituées de plusieurs couches parallèles de résines thermoplastiques, deux couches adjacentes ayant des indices de réfraction différents. Il s'agit d'un papier décoratif qui n'est pas spécifiquement destiné aux stratifiés; il n'est ni mentionné que les particules sont spécialement résistantes à la chaleur, aux solvants et à la lumière ni qu'il est possible de mettre une feuille protectrice sans atténuer l'effet irisé.DOW CHEMICAL British patent GB-1 107 341 describes a paper intimately containing a large number of iridescent plastic particles made up of several parallel layers of thermoplastic resins, two adjacent layers having different refractive indices. It is a decorative paper that is not specifically intended for laminates; it is neither mentioned that the particles are especially resistant to heat, solvents and light nor that it is possible to put a protective sheet without attenuating the iridescent effect.

Selon la technique antérieure, les effets obtenus avec des poudres sont uniformes du fait que les particules sont sphériques et de faible granulométrie.According to the prior art, the effects obtained with powders are uniform because the particles are spherical and of small particle size.

De plus, les poudres selon la technique antérieure, du fait de leur forme sphérique et de leur faible granulométrie présentent les inconvénients de décanter facilement et d'avoir un pouvoir couvrant faible.In addition, the powders according to the prior art, due to their spherical shape and their small particle size have the disadvantages of settling easily and having a low covering power.

Selon des procédés connus, il est courant d'utiliser de la poudre d'aluminium pour créer un effet décoratif. Or l'aluminium s'oxyde au contact de l'eau, il y a un dégagement d'hydrogène, ce qui est évidemment dangereux ; de plus, l'aluminium se ternit et perd donc son éclat métallique ; ces particules ont des conditions d'utilisation très restreintes.According to known methods, it is common to use aluminum powder to create a decorative effect. Now aluminum oxidizes on contact with water, there is a release of hydrogen, which is obviously dangerous; moreover, aluminum tarnishes and therefore loses its metallic luster; these particles have very limited conditions of use.

Les particules sont également soumises à des températures élevées, de l'ordre de 160°C environ, lors de la stratification des feuilles.The particles are also subjected to high temperatures, of the order of about 160 ° C., during the stratification of the sheets.

De plus, les stratifiés, lors de leur utilisation, sont souvent soumis à la lumière visible ou artificielle pendant des périodes prolongées. Par exemple, la demanderesse a décrit dans la demande de brevet français FR-A-89 05541 une feuille destinée à être soumise à l'action prolongée de la lumière, ayant une première teinte à la lumière visible de longueur d'onde comprise entre 400 et 800 nanomètres et une seconde teinte différente de la première, à la lumière artificielle de longueur d'onde inférieure à 400 nanomètres et supérieure à 800 nanomètres ; cette impression comporte au moins un pigment luminescent.In addition, laminates, when in use, are often exposed to visible or artificial light for extended periods of time. For example, the applicant has described in French patent application FR-A-89 05541 a sheet intended to be subjected to the prolonged action of light, having a first shade with visible light of wavelength between 400 and 800 nanometers and a second shade different from the first, in artificial light with a wavelength less than 400 nanometers and greater than 800 nanometers; this print comprises at least one luminescent pigment.

L'invention vise à pallier ces inconvénients.The invention aims to overcome these drawbacks.

Un premier but de l'invention est de fournir une feuille utilisable pour stratifiés, cette feuille présentant des effets métalliques de tailles, de teintes et de formes variées que l'on peut choisir selon les effets décoratifs souhaités.A first object of the invention is to provide a sheet usable for laminates, this sheet having metallic effects of various sizes, colors and shapes which can be chosen according to the desired decorative effects.

Un deuxième but de l'invention est donc d'utiliser des particules brillantes ayant un pouvoir couvrant supérieur aux poudres habituellement utilisées et décantant difficilement.A second object of the invention is therefore to use shiny particles having a covering power greater than the powders usually used and difficult to settle.

Un troisième but de l'invention est d'introduire les particules, soit en masse dans la feuille, lors de sa fabrication par un procédé papetier par exemple, soit par impression de la feuille par une encre contenant les particules, un liant et un solvant du liant. C'est pourquoi, on doit pouvoir utiliser ces particules en milieu aqueux et/ou en milieu solvant non aqueux; elles doivent être non réactives avec le milieu choisi.A third object of the invention is to introduce the particles, either in bulk into the sheet, during its manufacture by a papermaking process for example, or by printing the sheet with an ink containing the particles, a binder and a solvent. of the binder. This is why it must be possible to use these particles in an aqueous medium and / or in a non-aqueous solvent medium; they must be non-reactive with the medium chosen.

Un quatrième but de l'invention est de déposer les particules lors de l'imprégnation de résine thermodurcissable, ce dépôt étant régulier et homogène.A fourth object of the invention is to deposit the particles during the impregnation of thermosetting resin, this deposit being regular and homogeneous.

Un cinquième but de l'invention est d'obtenir des impressions résistant à la lumière visible ou non visible.A fifth object of the invention is to obtain prints resistant to visible or non-visible light.

Un moyen de l'invention est d'utiliser des particules métalliques, ou des paillettes métallisées, qui sont résistantes à l'eau et/ou aux solvants non aqueux, à la chaleur et à la lumière visible ou non visible.One means of the invention is to use metallic particles, or metallized flakes, which are resistant to water and / or to non-aqueous solvents, to heat and to visible or non-visible light.

Pour parvenir aux buts de l'invention, on peut utiliser selon l'invention des particules obtenues par découpe de feuilles minces. Elles peuvent avoir des formes géométriques très variées, par exemple une forme d'hexagone, de rectangle, de carré, d'étoile. Elles peuvent aussi avoir des tailles variées. L'effet brillant sera d'autant meilleur que la taille est plus grande. De préférence, la plus grande dimension des paillettes métallisées est supérieure à 80 micromètres, plus préférentiellement au moins égale à 100 micromètres.To achieve the aims of the invention, particles obtained by cutting thin sheets can be used according to the invention. They can have very varied geometric shapes, for example a hexagon, rectangle, square, star shape. They can also have various sizes. The shinier effect will be better the larger the size. Preferably, the largest dimension of the metallized flakes is greater than 80 micrometers, more preferably at least equal to 100 micrometers.

Ces formes et ces tailles variées présentent l'avantage de fournir des effets décoratifs très diversifiés comme il a été mentionné précédemment.These varied shapes and sizes have the advantage of providing a wide variety of decorative effects, as mentioned. previously.

La feuille faite selon l'invention pourraît être utilisée comme feuille de base pour réaliser l'impression comportant des pigments luminescents.The sheet made according to the invention could be used as a base sheet for carrying out the printing comprising luminescent pigments.

Ainsi l'invention fournit une feuille pour stratifié présentant un décor à effet métallique caractérisée par le fait qu'elle comporte des particules métalliques ou des paillettes métallisées non sensibles à l'eau, résistant au moins à une température de 100°C et résistant à la lumière, lesdites particules ou paillettes étant revêtues d'une couche protectrice de vernis.Thus the invention provides a laminate sheet having a metallic effect decoration characterized in that it comprises metallic particles or metallized flakes which are not sensitive to water, resistant at least to a temperature of 100 ° C. and resistant to light, said particles or flakes being coated with a protective layer of varnish.

Les paillettes métallisées utilisées pour l'invention peuvent être obtenues par découpe d'un film plastique métallisé. La couche métallique peut être recouverte d'une couche protectrice de vernis. Le métal utilisé est de préférence l'aluminium. Le film est de préférence du polyester. Les particules métalliques peuvent aussi être obtenues par découpe d'une feuille d'aluminium hautement polie recouverte également d'une couche protectrice de vernis. Cette couche protectrice est de préférence un vernis à base de résine époxy.The metallized flakes used for the invention can be obtained by cutting a metallized plastic film. The metal layer can be covered with a protective layer of varnish. The metal used is preferably aluminum. The film is preferably polyester. The metal particles can also be obtained by cutting a highly polished aluminum sheet also covered with a protective layer of varnish. This protective layer is preferably a varnish based on epoxy resin.

Ces paillettes peuvent être colorées. Les paillettes peuvent présenter des tons métalliques par exemple d'or, d'argent, et être de couleur unique ou multicolore.These glitter can be colored. The sequins can have metallic tones, for example gold, silver, and be of a single or multicolored color.

Ces particules ont une épaisseur d'environ une dizaine de micromètres ; leurs formes et leurs tailles sont variées.These particles have a thickness of about ten micrometers; their shapes and sizes are varied.

La feuille utilisée selon l'invention est de préférence à base de fibres de cellulose. Elle est éventuellement colorée. Elle peut contenir des fibres non cellulosiques, par exemple des fibres de polyoléfines, de polyester.The sheet used according to the invention is preferably based on cellulose fibers. It is possibly colored. It can contain non-cellulosic fibers, for example polyolefin fibers, polyester fibers.

L'invention fournit une feuille pour stratifié, présentant un décor à effet métallique, pour laquelle lesdites particules métalliques ou métallisées peuvent être incorporées lors de sa fabrication. Les paillettes peuvent être ajoutées à la suspension aqueuse contenant les fibres de cellulose, le mélange est ensuite égoutté sur une toile, la feuille obtenue est alors pressée entre des cylindres puis séchée.On peut imprimer cette feuille pour réaliser un décor classique (faux-bois, faux-marbre, etc...) ; le décor est mis en valeur par l'effet métallisé de la feuille support.The invention provides a laminate sheet, having a metallic effect decoration, for which said particles metallic or metallized can be incorporated during its manufacture. The glitter can be added to the aqueous suspension containing the cellulose fibers, the mixture is then drained on a canvas, the sheet obtained is then pressed between cylinders and then dried. We can print this sheet to achieve a classic decor (faux wood , faux marble, etc ...); the decor is enhanced by the metallic effect of the support sheet.

Enfin, les paillettes ou particules peuvent être déposées lors de l'imprégnation de la feuille par une résine thermodurcissable par saupoudrage ou pulvérisation quand la résine d'imprégnation est encore liquide et donc non thermodurcie.Finally, the flakes or particles can be deposited during the impregnation of the sheet with a thermosetting resin by dusting or spraying when the impregnating resin is still liquid and therefore not thermoset.

Par exemple, on peut utiliser un répartiteur de poudres fabriqué par PILLON-ANDRIOT et breveté sous le numéro EP-A-307 318.For example, one can use a powder distributor made by PILLON-ANDRIOT and patented under the number EP-A-307 318.

L'invention fournit aussi une feuille pour stratifié présentant un effet métallique pour laquelle les particules métalliques ou paillette métallisées sont appliquées sur la feuille par impression héliographique d'une encre contenant lesdites particules. Les feuilles réalisées selon l'invention peuvent être imprégnées d'une résine thermodurcissable.The invention also provides a laminate sheet having a metallic effect for which the metallic particles or metallized flakes are applied to the sheet by heliographic printing of an ink containing said particles. The sheets produced according to the invention can be impregnated with a thermosetting resin.

L'invention fournit une composition d'encre pour impression héliographique d'une feuille pour stratifié présentant un décor à effet métallique caractérisée par le fait qu'elle comprend:

  • au moins des paillettes métallisées non sensibles à l'eau, résistant au moins à une température de 100°C et résistant à la lumière naturelle non visible
  • au moins un liant vinylique ou (méth)acrylique
  • au moins un solvant
    Ce solvant peut être un alcool, de l'eau ou un mélange eau-alcool.
    Cette encre peut contenir des agents régulateurs de rhéologie.
The invention provides an ink composition for heliographic printing of a laminate sheet having a metallic effect decoration, characterized in that it comprises:
  • at least metallic flakes not sensitive to water, resistant at least to a temperature of 100 ° C and resistant to non-visible natural light
  • at least one vinyl or (meth) acrylic binder
  • at least one solvent
    This solvent can be an alcohol, water or a water-alcohol mixture.
    This ink may contain rheology regulating agents.

L'invention fournit aussi une autre composition d'encre qui comprend :

  • au moins des paillettes métallisées non sensibles à l'eau, résistant au moins à une température de 100°C et résistant à la lumière naturelle ou non visible.
  • au moins un liant aqueux à base de caséine
  • au moins un insolubilisant de la caséine
  • au moins un solvant eau/alcool
The invention also provides another ink composition which includes:
  • at least metallized flakes not sensitive to water, resistant at least to a temperature of 100 ° C and resistant to natural or invisible light.
  • at least one aqueous binder based on casein
  • at least one insoluble casein
  • at least one water / alcohol solvent

La demanderesse a trouvé de façon surprenante que l'effet optique décoratif donné par une feuille décorée par les paillettes choisies pour l'invention n'est pas altéré par la pose d'une feuille overlay standard. Ainsi, l'invention fournit aussi des stratifiés comportant une feuille décorative présentant un décor à effet métallique dû aux particules métalliques ou métallisées non sensibles aux solvants aqueux ou non aqueux, résistant à des températures supérieures à 100°C et résistant à la lumière et comportant éventuellement une feuille protectrice overlay.The Applicant has surprisingly found that the decorative optical effect given by a sheet decorated with the flakes chosen for the invention is not altered by the installation of a standard overlay sheet. Thus, the invention also provides laminates comprising a decorative sheet having a metallic effect decoration due to metallic or metallized particles not sensitive to aqueous or non-aqueous solvents, resistant to temperatures above 100 ° C and resistant to light and comprising possibly a protective overlay sheet.

L'invention permet de fournir également des stratifiés comportant une feuille décorative présentant un décor à effet métallique comportant les particules métalliques, métallisées précédemment citées, cette feuille étant recouverte d'une feuille overlay pour la protéger et qui serait aussi décorée avec des particules précédemment citées.The invention also makes it possible to supply laminates comprising a decorative sheet having a metallic effect decoration comprising the metallic particles, metallized previously mentioned, this sheet being covered with an overlay sheet to protect it and which would also be decorated with previously mentioned particles. .

L'invention sera mieux comprise à l'aide des exemples suivants.The invention will be better understood using the following examples.

EXEMPLESEXAMPLES EXEMPLE 1EXAMPLE 1

  • A/. On réalise une encre héliographique en mélangeant :
    • . des particules métallisées :   5 parties
      paillettes de feuille de polyester métallisée avec vernis protecteur époxy, de couleur argent, dimensions 100x100x12 µm fabriqué par DRAGON-WERK, commercialisé par CHEMILAB ESSOR
    • . un solvant :   30 parties
      (éthylglycol) pour avoir une viscosité adaptée à la machine d'impression utilisée.
    • . un liant :   65 parties
      vernis vinylique commercialisé par SICPA (à 15% de poids sec)

    On applique ce mélange sur une feuille de papier de 80 g/m2, de couleur noire, par impression par héliogravure. On a déposé environ 3 g/m2 (en poids sec) de paillettes.
    On obtient une feuille décorative présentant un décor à effet métallique.    AT/. A heliographic ink is produced by mixing:
    • . metallized particles: 5 parts
      glitter of metallic polyester sheet with epoxy protective varnish, silver color, dimensions 100x100x12 µm manufactured by DRAGON-WERK, marketed by CHEMILAB ESSOR
    • . a solvent: 30 parts
      (ethyl glycol) to have a viscosity adapted to the printing machine used.
    • . a binder: 65 parts
      vinyl varnish marketed by SICPA (at 15% dry weight)

    This mixture is applied to a sheet of 80 g / m2 paper, black in color, by gravure printing. About 3 g / m2 (by dry weight) of flakes were deposited.
    A decorative sheet is obtained having a decor with a metallic effect.
  • B/. On utilise cette feuille pour fabriquer un stratifié haute pression sans overlay :
    • . on emploie 3 feuilles de papier kraft imprégné de résine phénolique de 120 g/m2,
    • . puis on pose au-dessus la feuille décorative obtenue selon l'invention,
    • . on stratifie l'ensemble en chauffant à 130°C pendant 30 minutes sous une pression de 100 MPa (100 kg/cm2).

    On obtient un stratifié présentant un effet métallique intense.    B /. We use this sheet to make a high pressure laminate without overlay:
    • . 3 sheets of kraft paper impregnated with phenolic resin of 120 g / m2 are used,
    • . then the decorative sheet obtained according to the invention is placed above it,
    • . the whole is laminated by heating at 130 ° C for 30 minutes under a pressure of 100 MPa (100 kg / cm2).

    A laminate with an intense metallic effect is obtained.
EXEMPLE 2EXAMPLE 2

On réalise un autre stratifié haute pression avec la feuille décorative obtenue selon l'exemple 1 en ajoutant sur cette feuille une feuille overlay de 28 g/m2 imprégnée de résine mélamine.Another high pressure laminate is produced with the decorative sheet obtained according to Example 1 by adding to this sheet a 28 g / m2 overlay sheet impregnated with melamine resin.

On stratifie comme précédemment. On obtient un stratifié présentant un effet métallique aussi intense que pour le stratifié fabriqué sans overlay.We laminate as before. We obtain a laminate with a metallic effect as intense as for the laminate manufactured without overlay.

Les particules métallisées choisies ainsi que l'encre réalisée permettent de fabriquer une feuille décorative dont l'effet décoratif métallique n'est pas atténué par la présence d'un overlay protecteur ; les particules ont bien résisté aux conditions opératoires.The metallized particles chosen as well as the ink produced make it possible to manufacture a decorative sheet whose effect decorative metal is not attenuated by the presence of a protective overlay; the particles withstood the operating conditions well.

EXEMPLE 3EXAMPLE 3

  • A/. On réalise une encre héliographique en mélangeant :
    • . des particules métallisées :   4 parties
      paillettes de feuille de polyester métallisée avec vernis protecteur époxy, de couleur argent dimensions 100x100x12 µm fabriqué par DRAGON-WERK, commercialisé par CHEMILAB ESSOR
    • . un solvant :   7 parties
      (eau/éthanol) pour avoir une viscosité adaptée à la machine d'impression utilisée.
    • . un liant :   87 parties
      vernis aqueux à base de caséine commercialisé par SICPA (à 13% de poids sec)
    • . un insolubilisant de la caséine : 2 parties
      formol à 20%

    On applique ce mélange sur une feuille de papier de 80 g/m2, de couleur noire, par impression par héliogravure. On a déposé environ 3 g/m2 (en poids sec) de paillettes.
    Pour renforcer l'accrochage des paillettes, on peut déposer une couche de vernis protecteur composé des mêmes constituants que l'encre ci-dessus mais sans les paillettes.
    On obtient une feuille décorative présentant un décor à effet métallique.    AT/. A heliographic ink is produced by mixing:
    • . metallized particles: 4 parts
      glitter of metallized polyester sheet with protective epoxy varnish, silver color dimensions 100x100x12 µm manufactured by DRAGON-WERK, marketed by CHEMILAB ESSOR
    • . a solvent: 7 parts
      (water / ethanol) to have a viscosity adapted to the printing machine used.
    • . a binder: 87 parts
      aqueous varnish based on casein marketed by SICPA (at 13% dry weight)
    • . casein insolubilizer: 2 parts
      20% formalin

    This mixture is applied to a sheet of 80 g / m2 paper, black in color, by gravure printing. About 3 g / m2 (by dry weight) of flakes were deposited.
    To strengthen the attachment of the glitter, a layer of protective varnish can be deposited, composed of the same constituents as the above ink but without the glitter.
    A decorative sheet is obtained having a decor with a metallic effect.
  • B/. On utilise cette feuille pour fabriquer un stratifié haute pression sans overlay comme dans l'exemple 1.
    On obtient un stratifié présentant un effet métallique intense.    B /. This sheet is used to make a high pressure laminate without overlay as in Example 1.
    A laminate with an intense metallic effect is obtained.
EXEMPLE 4EXAMPLE 4

On réalise une feuille overlay selon l'invention. A une suspension aqueuse de fibres de cellulose, on ajoute 15% en poids sec par rapport aux fibres, de paillettes en feuille de polyester métallisé par de l'aluminium et recouvert d'un vernis époxy. Ces paillettes sont multicolores.An overlay sheet according to the invention is produced. To an aqueous suspension of cellulose fibers, 15% by dry weight, based on the fibers, of flakes of polyester sheet metallized with aluminum and covered with an epoxy varnish is added. These sequins are multicolored.

Le mélange est alors mis en oeuvre sur une machine à papier pour former une feuille ayant un poids de 60 g/m².The mixture is then used on a paper machine to form a sheet having a weight of 60 g / m².

Puis on réalise un stratifié haute pression selon la technique décrite dans l'exemple 1 en utilisant une feuille décor unie de couleur noire et la feuille overlay réalisée comme ci-dessus.Then a high pressure laminate is produced according to the technique described in Example 1 using a plain decor sheet of black color and the overlay sheet produced as above.

On obtient un stratifié présentant un effet métallique. Ce stratifié est résistant à l'abrasion, les particules ont une bonne tenue.A laminate having a metallic effect is obtained. This laminate is resistant to abrasion, the particles have a good resistance.

EXEMPLE 5EXAMPLE 5

On fabrique un papier pour stratifié à partir d'une suspension de fibres de cellulose dans laquelle on rajoute :

  • . 10% de charges minérales (kaolin ou talc),
  • . 5% de pâte d'aluminium stabilisé G.R. SILVEX 1537 ou 1258 vendue par CARBONNEL et JACQUEMOT (France),
  • . éventuellement 3% environ d'un pigment organique ou minéral utilisé habituellement pour les papiers pour stratifiés,
  • . 1,5% de résine mélamine formol comme agent de résistance humide.
  • . 1% de sulfate d'aluminium comme agent de rétention.
A laminate paper is made from a suspension of cellulose fibers to which we add:
  • . 10% mineral fillers (kaolin or talc),
  • . 5% of GR SILVEX 1537 or 1258 stabilized aluminum paste sold by CARBONNEL and JACQUEMOT (France),
  • . optionally around 3% of an organic or mineral pigment usually used for laminate papers,
  • . 1.5% melamine formalin resin as a wet strength agent.
  • . 1% aluminum sulphate as a retention agent.

On règle le pH à 7 à l'aide de carbonate de sodium ou calcium.The pH is adjusted to 7 using sodium carbonate or calcium.

On forme la feuille de papier et on sèche. On imprègne avec une résine mélamine formol. On stratifie comme dans les exemples précédents, avec ou sans overlay. On obtient un panneau ayant l'aspect d'une peinture métallisée. Cet aspect métallisé est aussi intense pour le panneau avec overlay que pour le panneau sans overlay.The sheet of paper is formed and dried. It is impregnated with a melamine formaldehyde resin. We laminate as in the previous examples, with or without overlay. A panel is obtained having the appearance of a metallic paint. This metallic appearance is as intense for the panel with overlay as for the panel without overlay.

EXEMPLE 6EXAMPLE 6

On réalise une feuille comme dans l'exemple 5 mais on imprime cette feuille après l'avoir séchée, pour faire un décor marbre. On imprègne et on stratifie comme précédemment.A sheet is produced as in Example 5 but this sheet is printed after having dried it, to make a marble decoration. We impregnate and laminate as before.

En comparant le panneau obtenu selon l'invention avec un panneau fabriqué avec une feuille décor qui ne comporte pas la pâte d'aluminium, on constate, de façon inattendue, que le décor imprimé est mis en valeur par la métallisation de la feuille.By comparing the panel obtained according to the invention with a panel manufactured with a decorative sheet which does not include the aluminum paste, it is found, unexpectedly, that the printed decoration is enhanced by the metallization of the sheet.

Claims (14)

  1. Laminate sheet having a decorative metallic effect, characterized by the fact that it comprises metallic particles or metallized flakes which are inert to water, which withstand temperatures in excess of 100°C and which are fast to light, said particles or flakes being covered by a protective layer of lacquer.
  2. Sheet according to claim 1, characterized by the fact that the metallized flakes are obtained by cutting them from a plastic film metallized with aluminum and covered by a protective layer of lacquer.
  3. Sheet according to claim 2, characterized by the fact that the plastic film is a polyester film.
  4. Sheet according to claim 1, characterized by the fact that the metallic particles are obtained by cutting them from a highly polished aluminum sheet covered by a protective layer of lacquer.
  5. Sheet according to claims 2 to 4, characterized by the fact that the protective layer is an epoxy lacquer.
  6. Sheet according to one of claims 1, 3 and 5, characterized by the fact that the largest dimension of the metallized flakes is greater than 80 micrometers.
  7. Sheet according to one of claims 1 to 6, characterized by the fact that it contains cellulose fibers and is optionally colored.
  8. Sheet according to one of claims 1 to 7, characterized by the fact that the metallic particles or metallized flakes are applied to the sheet by photo-engraving with an ink containing said particles or flakes.
  9. Sheet according to one of claims 1 to 8, characterized by the fact that the metallic particles or metallized flakes are added in bulk to the sheet during the manufacture of the sheet by a papermaking process.
  10. Sheet according to one of claims 1 to 9, characterized by the fact that said sheet is impregnated with a heat-setting resin.
  11. Sheet according to one of claims 1 to 9, characterized by the fact that the metallized flakes are deposited uniformly following impregnation but before the resin is heat-hardened.
  12. Ink composition for imprinting a sheet according to one of claims 1 to 8, by photo-engraving, characterized by the fact that it comprises:
    - at least some metallized flakes which are inert to water, which withstand temperatures in excess of 100°C, and which are fast to light,
    - at least one (meth)acrylic or vinylic binder,
    - at least one alcohol solvent.
  13. Ink composition for imprinting a sheet according to one of claims 1 to 8, by photo-engraving, characterized by the fact that it comprises:
    - at least some metallized flakes which are inert to water, which withstand temperatures in excess of 100°C and which are fast to light,
    - at least one casein-based aqueous binder,
    - at least one insolubilizer,
    - at least one water/alcohol solvent.
  14. Laminate comprising at least one decorative sheet according to one of claims 1 to 11 and comprising a protective overlay sheet.
EP19910903889 1990-02-06 1991-02-05 Decorative sheets used mainly for panel manufacturing comprising metallic particles or metallized flakes Expired - Lifetime EP0513155B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91903889T ATE99604T1 (en) 1990-02-06 1991-02-05 DECORATIVE FOIL WITH METALLIC SCALES OR METALLIZED FLAKES, ESPECIALLY FOR THE PRODUCTION OF LAMINATE PANELS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9001357A FR2657816B1 (en) 1990-02-06 1990-02-06 DECORATIVE SHEETS WHICH CAN BE USED IN PARTICULAR FOR THE MANUFACTURE OF LAMINATE PANELS AND INCLUDING METALLIC OR IRIDESCENT FLAKES.
FR9001357 1990-02-06

Publications (2)

Publication Number Publication Date
EP0513155A1 EP0513155A1 (en) 1992-11-19
EP0513155B1 true EP0513155B1 (en) 1994-01-05

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EP (1) EP0513155B1 (en)
AU (1) AU651809B2 (en)
DE (1) DE69100943T2 (en)
DK (1) DK0513155T3 (en)
ES (1) ES2050535T3 (en)
FR (1) FR2657816B1 (en)
WO (1) WO1991012146A2 (en)

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US5702806A (en) * 1991-07-18 1997-12-30 O'dell; Robin D. Decorative laminate surface layer
US5866207A (en) * 1991-07-18 1999-02-02 International Paper Company Process for producing aesthetic surface layer composition and aesthetic surface layer
US5466511A (en) * 1991-07-18 1995-11-14 Nevamar Corporation Coated transfer sheet and laminate produced therefrom
FR2718997A1 (en) * 1994-04-22 1995-10-27 Ober Ste Ind Process for forming decorative marquetry-type panel etc.
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US8705805B2 (en) 2011-01-10 2014-04-22 Peter Alexander Forrest Secure portable token and systems and methods for identification and authentication of the same

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DE69100943T2 (en) 1994-05-19
DK0513155T3 (en) 1994-03-21
FR2657816A1 (en) 1991-08-09
AU7236591A (en) 1991-09-03
EP0513155A1 (en) 1992-11-19
AU651809B2 (en) 1994-08-04
DE69100943D1 (en) 1994-02-17
ES2050535T3 (en) 1994-05-16
WO1991012146A2 (en) 1991-08-22
WO1991012146A3 (en) 1991-10-03
FR2657816B1 (en) 1992-12-11

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