EP1472410A2 - Highly-opaque layered sheet and the production method thereof - Google Patents

Highly-opaque layered sheet and the production method thereof

Info

Publication number
EP1472410A2
EP1472410A2 EP03715030A EP03715030A EP1472410A2 EP 1472410 A2 EP1472410 A2 EP 1472410A2 EP 03715030 A EP03715030 A EP 03715030A EP 03715030 A EP03715030 A EP 03715030A EP 1472410 A2 EP1472410 A2 EP 1472410A2
Authority
EP
European Patent Office
Prior art keywords
ultra
monojet
sheet
paper
coating
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
EP03715030A
Other languages
German (de)
French (fr)
Other versions
EP1472410B1 (en
Inventor
Laurence Avazzeri
Jérôme BORDEAU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ArjoWiggins Papiers Couches SA
Original Assignee
ArjoWiggins Papiers Couches SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ArjoWiggins Papiers Couches SA filed Critical ArjoWiggins Papiers Couches SA
Publication of EP1472410A2 publication Critical patent/EP1472410A2/en
Application granted granted Critical
Publication of EP1472410B1 publication Critical patent/EP1472410B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/72—Coated paper characterised by the paper substrate
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/28—Colorants ; Pigments or opacifying agents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/253—Cellulosic [e.g., wood, paper, cork, rayon, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/254—Polymeric or resinous material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • Y10T428/257—Iron oxide or aluminum oxide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/3188—Next to cellulosic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31971—Of carbohydrate
    • Y10T428/31993—Of paper

Definitions

  • Ultra-opaque sheets are also known which are produced by at least two jets of white coated paper laminated with a black glue and where there too the ultra-opacity is provided by the absorption of light due to the black coloring, while maintaining a white and homogeneous visual appearance.
  • This technique has the drawback of using laminating, a step which is often difficult to carry out, due to the choice and the quantity of glue to be used, which does not allow high manufacturing speeds and which can sometimes cause assembly faults between the paper jets.
  • One of the aims of the invention is therefore to provide ultra-opaque sheets which can be manufactured at low cost, at high speeds and which do not have the manufacturing constraints of the prior art.
  • the colored support is intended in this case to screen the passage of light, an imperative condition for obtaining the desired opacity.
  • the coating head is defined according to the properties of the coating fluid, so as to obtain the most uniform thickness of coating film possible in the machine direction.
  • the sheet has a whiteness measured according to ISO 11475 standard greater than 75, and preferably greater than or equal to 78.
  • the invention can be extended to the preparation of lightly colored or pastel ultra-opaque sheets for which the modifications to be made relate only to the coating pigment and not on the essential elements of the invention.
  • said layer comprising in dry 0.05 part of black carbon for 100 parts of a mixture of 90% calcium carbonate and 10% styrene butadiene latex.
  • the sheet 1b according to the invention although of slightly lower weight per square meter, is both more ultra-opaque, whiter and more homogeneous in surface finish than the sheet 1a of the prior art made from a more complex industrial process (bijet).
  • An ultra opaque sheet according to the invention 2b of weight per square meter identical to sheet 2a, is produced from a single-ply paper of weight per square meter 240 grams of gray-black color where the opacifying coloring is provided as in example lb by a precoat on each side of 5 grams per square meter, said layer comprising in dry 0.5 part of carbon black for 100 parts of a mixture identical to that used in example lb.
  • This colored monojet is then coated, still by curtain coating process, on each of its two faces of 30 grams per square meter of a white pigmented layer identical to that used in example lb.

Abstract

The invention relates to a highly-opaque layered sheet. The inventive sheet is characterised in that it comprises a coloured support which is made from a single ply of material, said support being disposed on at least one of the faces of one or more white pigmented layers. The invention also relates to a method of producing said highly-opaque layered sheet.

Description

Feuille couchée ultra opaque et son procédé de fabrication Ultra opaque coated sheet and its manufacturing process
La présente invention concerne des feuilles couchées ultra-opaques et leur procédé de fabrication.The present invention relates to ultra-opaque coated sheets and their manufacturing process.
Des feuilles couchées ultra-opaques sont couramment utilisées dans des applications diverses pour lesquelles elles doivent pouvoir être imprimées et où il est impératif que l'opacité desdites feuilles soit très supérieure à celle de feuilles couchées conventionnelles de poids par mètre carré comparable.Ultra-opaque coated sheets are commonly used in various applications for which they must be able to be printed and where it is imperative that the opacity of said sheets is much greater than that of conventional coated sheets of comparable weight per square meter.
On connaît ainsi des feuilles ultra-opaques qui sont réalisées par couchage, traditionnellement au moyen de couclieuses à lame d'air, à lame trainante ou à barre rotative, d'au moins l'une des deux faces d'un support papier multijet, préférentiellement un trijet où le jet central de composition papetière grise apporte l'ultra-opacité par absorption de la lumière, et est encadré par deux jets de composition papetière blanche tels que l'ensemble de chaque jet blanc supportant une ou plusieurs couches blanches confère à la feuille ultra-opaque une apparence visuelle blanche et homogène.Thus, ultra-opaque sheets are known which are produced by coating, traditionally by means of air knife, drag blade or rotary bar couplers, of at least one of the two faces of a multijet paper support, preferably a trijet where the central jet of gray paper composition provides ultra-opacity by absorption of light, and is framed by two jets of white paper composition such that all of each white jet supporting one or more white layers gives the ultra-opaque sheet has a white and homogeneous visual appearance.
Un inconvénient de cette technique est la mise en œuvre difficile et onéreuse d'une machine multijet, notamment pour la fabrication de papiers à faible grammage.A drawback of this technique is the difficult and expensive implementation of a multi-jet machine, in particular for the manufacture of papers with low grammage.
On connaît également des feuilles ultra-opaques qui sont réalisées par au moins deux jets de papier couché blanc contrecollés avec une colle noire et où là aussi l'ultra-opacité est apportée par l'absorption de la lumière du fait de la coloration noire, tout en conservant une apparence visuelle blanche et homogène. Cette technique présente quant à elle l'inconvénient d'utiliser un contrecollage, étape qui s'avère souvent délicate à réaliser, de part le choix et de la quantité de colle à utiliser, qui ne permet pas des vitesses élevées de fabrication et qui peut parfois engendrer des défauts d'assemblage entre les jets papier.Ultra-opaque sheets are also known which are produced by at least two jets of white coated paper laminated with a black glue and where there too the ultra-opacity is provided by the absorption of light due to the black coloring, while maintaining a white and homogeneous visual appearance. This technique has the drawback of using laminating, a step which is often difficult to carry out, due to the choice and the quantity of glue to be used, which does not allow high manufacturing speeds and which can sometimes cause assembly faults between the paper jets.
Un des buts de l'invention est donc de fournir des feuilles ultra opaques pouvant être fabriquées à moindre coût, à des vitesses élevées et ne présentant pas les contraintes de fabrication de l'art antérieur.One of the aims of the invention is therefore to provide ultra-opaque sheets which can be manufactured at low cost, at high speeds and which do not have the manufacturing constraints of the prior art.
Un autre but de l'invention est de fournir des feuilles ultra opaques ayant un très bon état de surface. La Demanderesse propose notamment d'utiliser des équipements de production les plus répandus, en particulier les machines à papier monojet, et de réduire le nombre d'étapes de fabrication, notamment l'étape de contrecollage.Another object of the invention is to provide ultra-opaque sheets having a very good surface condition. The Applicant proposes in particular to use the most widespread production equipment, in particular single-jet paper machines, and to reduce the number of manufacturing steps, in particular the laminating step.
Au vu de ces considérations, la Demanderesse s'est attachée à fournir un support de base opacifiant à partir d'un seul jet de matière coloré sur lequel est appliqué une ou plusieurs couches blanches sur au moins une des faces.In view of these considerations, the Applicant endeavored to provide an opacifying base support from a single jet of colored material to which one or more white layers are applied on at least one of the faces.
Le support coloré est destiné en l'occurrence à faire écran au passage de la lumière, condition impérative à l'obtention de l'opacité recherchée.The colored support is intended in this case to screen the passage of light, an imperative condition for obtaining the desired opacity.
L'intensité et la nuance de la couleur du support dépendent de l'application finale et de l'ultra-opacité recherchée par absorption de la lumière : préférentiellement la couleur du support de base est plus ou moins grise, plus ou moins noire.The intensity and the nuance of the color of the support depend on the final application and on the ultra-opacity sought by absorption of the light: preferably the color of the basic support is more or less gray, more or less black.
Selon l'invention, le monojet coloré est donc couché, selon les applications finales sur une ou deux faces, de manière à apporter une apparence visuelle blanche et homogène, ainsi qu'une bonne imprimabilité.According to the invention, the colored monojet is therefore coated, depending on the final applications on one or two sides, so as to provide a white and homogeneous visual appearance, as well as good printability.
La Demanderesse a tiré partie des méthodes modernes de couchage en milieu papetier, pour garantir une uniformité dans l'enduction, condition nécessaire à l'obtention d'une bonne opacité et d'un bon rendu d'impression au final.The Applicant has taken advantage of modern coating methods in the paper industry, to guarantee uniformity in the coating, a condition necessary for obtaining good opacity and good printing results in the end.
Alors que toutes les tentatives jusqu'à présent pour recouvrir un support coloré avec une ou des couches blanches, notamment par les procédés répandus de couchage lame d'air ou de couchage à lame acier, conduisaient à des produits dont l'aspect visuel n'était pas homogène, la Demanderesse a découvert qu'un procédé de couchage utilisé de manière marginale jusqu'à présent dans l'industrie papetière, le couchage à rideau, permettait d'aboutir aux feuilles ultra-opaques et d'aspect visuel homogène recherchées.Whereas all the attempts until now to cover a colored support with one or more white layers, in particular by the widespread methods of air knife coating or of steel blade coating, have led to products whose visual appearance does not was not homogeneous, the Applicant has discovered that a coating process used marginally so far in the paper industry, curtain coating, made it possible to achieve the ultra-opaque sheets and of homogeneous visual appearance sought.
La Demanderesse a constaté également que ce procédé permettait de réduire la quantité de l'agent colorant nécessaire à l'obtention dudit effet opacifiant .The Applicant has also found that this process makes it possible to reduce the amount of coloring agent necessary for obtaining said opacifying effect.
Le procédé de couchage à rideau est une méthode de couchage prédosée, utilisée dans l'industrie photographique depuis plus de 20 ans. Cette technologie a été développée pour les films photographiques, qui nécessitent le dépôt de nombreuses couches différentes, généralement entre 8 et 10, avec des contraintes sévères tant au niveau de l'état de surface que de l'épaisseur des couches appliquées. Le procédé de couchage à rideau est basé sur l'écoulement libre sur une surface à partir d'une tête de couchage située au-dessus de la surface à enduire à une hauteur variant entre 10 et 25 cm.The curtain coating process is a pre-dosed coating method, used in the photographic industry for over 20 years. This technology was developed for photographic films, which require the deposition of many different layers, generally between 8 and 10, with severe constraints both in terms of the surface state and the thickness of the layers applied. The curtain coating process is based on free flow on a surface from a coating head located above the surface to be coated at a height varying between 10 and 25 cm.
La tête de couchage est définie selon les propriétés du fluide de couchage, de façon à obtenir une épaisseur de film de couchage la plus uniforme possible dans le sens marche ou travers de la machine.The coating head is defined according to the properties of the coating fluid, so as to obtain the most uniform thickness of coating film possible in the machine direction.
Il est généralement utilisé deux types de têtes de couchage : les têtes à fentes et les têtes à surface de glissement, telles que le représentent respectivement les figures 1 et 2. Un des intérêts du couchage à rideau est la possibilité d'appliquer deux ou plusieurs couches simultanément.Two types of coating heads are generally used: slotted heads and sliding surface heads, as shown in FIGS. 1 and 2. One of the advantages of curtain coating is the possibility of applying two or more layers simultaneously.
Les têtes de fentes sont en pratique limitées à 2 ou 3 couches maximum du fait de leur configuration, tandis que le nombre maximal de couches déposées simultanément dans une tête à surface de glissement peut dépasser 10. Un autre avantage est l'absence de contact entre la tête de couchage et le support, contrairement au couchage à lame notamment.Slot heads are in practice limited to 2 or 3 layers maximum due to their configuration, while the maximum number of layers deposited simultaneously in a sliding surface head can exceed 10. Another advantage is the absence of contact between the coating head and the support, unlike the blade coating in particular.
Ceci permet de supprimer les efforts appliqués sur le support lors du couchage, générateur de casse machine en particulier, d'accélérer de façon non négligeable la vitesse de la machine et, par voie de conséquence, d'abaisser les coûts de production.This eliminates the forces applied to the support during coating, machine break generator in particular, significantly accelerate the speed of the machine and, consequently, lower production costs.
L'invention a donc pour objet une feuille couchée ultra opaque constituée d'un support coloré réalisé à partir d'un monojet de matière, ledit support étant couché sur au moins une de ses faces d'une ou plusieurs couches pigmentées blanches ou claires.The subject of the invention is therefore an ultra opaque coated sheet consisting of a colored support produced from a monojet of material, said support being coated on at least one of its faces with one or more white or light pigmented layers.
Par couches pigmentées, on entend les compositions (comprenant principalement des pigments et des liants) couramment employées pour les papiers couchés impression-écriture. Leur nombre, leur composition exacte, leur poids par mètre carré est fonction de l'application finale de la feuille ultra-opaque. Selon un mode particulier de l'invention, la feuille possède un indice d'ultra- opacité supérieur à 92, et de manière avantageuse supérieur ou égal à 94 dans le cas où son grammage est inférieur à 300 g/m2 et un indice d'ultra-opacité supérieur à 94, et de manière avantageuse supérieure ou égal à 98 dans le cas où son grammage est supérieur ou égal à 300 g/m2.By pigmented layers is meant the compositions (mainly comprising pigments and binders) commonly used for coated printing-writing papers. Their number, their exact composition, their weight per square meter depends on the final application of the ultra-opaque sheet. According to a particular embodiment of the invention, the sheet has an ultra-opacity index greater than 92, and advantageously greater than or equal to 94 in the case where its grammage is less than 300 g / m 2 and an index d '' ultra-opacity greater than 94, and advantageously greater than or equal to 98 in the case where its grammage is greater than or equal to 300 g / m 2 .
L'indice d'ultra-opacité sera explicité plus loin dans l'exposé de l'invention.The ultra-opacity index will be explained later in the description of the invention.
Selon un autre mode particulier de l'invention, la feuille possède une blancheur mesurée selon la norme ISO 11475 supérieure à 75, et de préférence supérieure ou égale à 78.According to another particular mode of the invention, the sheet has a whiteness measured according to ISO 11475 standard greater than 75, and preferably greater than or equal to 78.
Selon un mode préféré de l'invention, le monojet de matière est un papier à base de fibres cellulosiques.According to a preferred embodiment of the invention, the monojet of material is a paper based on cellulose fibers.
Selon une autre variante de l'invention, le monojet est un film plastique coloré ou un film plastique avec une précouche colorée opacifiante.According to another variant of the invention, the monojet is a colored plastic film or a plastic film with an opacifying colored precoat.
Le poids par mètre carré du monojet papier ou plastique est directement dépendant de l'application. Il est compris entre 50 et 500 g/m2.The weight per square meter of the paper or plastic monojet is directly dependent on the application. It is between 50 and 500 g / m 2 .
L'invention a également pour objet un procédé de fabrication d'une feuille définie précédemment, dans lequel on réalise d'abord un support coloré à partir d'un monojet de matière, support que l'on enduit ensuite sur au moins une de ses faces avec une ou plusieurs couches pigmentées blanches.The subject of the invention is also a method of manufacturing a sheet defined above, in which a colored support is first produced from a monojet of material, support which is then coated on at least one of its faces with one or more white pigmented layers.
Selon un mode avantageux de l'invention, le dépôt de la ou des couches pigmentées blanches est réalisé au moyen d'une tête de couchage à rideau. Selon un mode particulier de l'invention, la coloration opacifiante est obtenue par incorporation de pigments opacifiants dans la masse d'un jet de papier.According to an advantageous embodiment of the invention, the deposition of the white pigmented layer or layers is carried out by means of a curtain coating head. According to a particular embodiment of the invention, the opacifying coloring is obtained by incorporating opacifying pigments into the mass of a paper jet.
Selon un autre mode particulier de l'invention, la coloration opacifiante est obtenue par dépôt en surface d'un jet de papier d'une précouche de pigments opacifiants soit au moyen d'une presse encolleuse, soit au moyen d'un dispositif de couchage, en particulier une tête de couchage à rideau, et de préférence simultanément et à l'aide de la même tête de couchage à rideau que lors de l'enduction de la ou des couches pigmentées blanches.According to another particular embodiment of the invention, the opacifying coloring is obtained by depositing on the surface of a paper jet a pre-layer of opacifying pigments either by means of a size press or by means of a coating device. , in particular a curtain coating head, and preferably simultaneously and using the same curtain coating head as during the coating of the white pigmented layer (s).
Selon un autre mode particulier de l'invention, le monojet de matière est un film plastique coloré ou un film plastique recouvert d'une précouche colorée opacifiante.According to another particular embodiment of the invention, the monojet of material is a colored plastic film or a plastic film covered with an opacifying colored precoat.
Selon un mode avantageux de l'invention, la matière colorante utilisée est du noir de carbone. L'invention se rapporte également à la carte à jouer ultra opaque obtenue par le procédé précédemment défini ou comportant comme base une feuille couchée ultra opaque précédemment définie.According to an advantageous embodiment of the invention, the coloring material used is carbon black. The invention also relates to the ultra-opaque playing card obtained by the previously defined method or comprising as a base an ultra-opaque coated sheet previously defined.
Bien que l'objectif principal de l'invention soit des feuilles ultra-opaques blanches, l'invention pourra être étendue à la préparation des feuilles ultra-opaques faiblement colorées ou pastels pour lesquelles les modifications à apporter ne portent que sur le pigment de couchage et non sur les éléments essentiels de l'invention.Although the main objective of the invention is white ultra-opaque sheets, the invention can be extended to the preparation of lightly colored or pastel ultra-opaque sheets for which the modifications to be made relate only to the coating pigment and not on the essential elements of the invention.
Les exemples comparatifs suivants, avec leur application finale, illustrent l'invention.The following comparative examples, with their final application, illustrate the invention.
Du fait des applications, les feuilles couchées ultra-opaques objet de l'invention sont trop opaques pour que la transmission de lumière puisse être déterminée avec les appareils spectrophotomètres disponibles dans le commerce. Pour pallier à cette difficulté et disposer de mesures significatives, reproductibles, en relation avec l'observation visuelle à contre-jour d'une lumière naturelle ou artificielle plus ou moins intense, la demanderesse a développé le dispositif de mesure suivant : une source de lumière incidente est constituée par une lampe à filament incandescent, ampoule de verre transparent, commercialisée par Philips sous la référence 60W-220N. La feuille couchée, dont l'opacité est à déterminer, est placée à la fois entre et au contact, a) côté source lumineuse, d'un diaphragme de diamètre 12 millimètres et b) côté opposé, du capteur de diamètre 20 millimètres d'un appareil luxmètre commercialisé par Gossen sous la référence Mavolux Digital.Due to the applications, the ultra-opaque coated sheets which are the subject of the invention are too opaque for light transmission to be determined with commercially available spectrophotometer devices. To overcome this difficulty and have significant, reproducible measurements, in relation to the visual observation against the light of more or less intense natural or artificial light, the applicant has developed the following measurement device: a light source incident consists of an incandescent filament lamp, transparent glass bulb, marketed by Philips under the reference 60W-220N. The coated sheet, the opacity of which is to be determined, is placed both between and in contact, a) on the light source side, with a diaphragm with a diameter of 12 millimeters and b) on the opposite side, with the sensor with a diameter of 20 millimeters a luxmeter device marketed by Gossen under the reference Mavolux Digital.
La distance entre le capteur luxmètre centré sur le diaphragme et la source lumineuse est préalablement ajustée de manière à ce que sans la feuille couchée, la valeur lue en lumière directe incidente soit 14000 lux et on relève la valeur L en lux de lumière transmise en présence de la feuille couchée. L'opacité de cette feuille peut alors être quantifiée par un « indice d'ultra-opacité » défini par la formule :The distance between the luxmeter sensor centered on the diaphragm and the light source is adjusted beforehand so that without the coated sheet, the value read in incident direct light is 14000 lux and the value L in lux of light transmitted is noted. of the coated sheet. The opacity of this sheet can then be quantified by an “ultra-opacity index” defined by the formula:
Indice d'ultra-opacité = 100 x ( 1- L/14000) A titre illustratif, des papiers couchés blancs traditionnels, c'est-à-dire non ultra-opaques ont selon cette méthode des indices d'ultra-opacité de l'ordre de 77 pour un papier de 130 grammes par mètre carré, et de l'ordre de 94 pour un papier de 300 grammes par mètre carré.Ultra-opacity index = 100 x (1- L / 14000) By way of illustration, traditional white coated papers, that is to say non-opaque papers have, according to this method, indices of ultra-opacity of the order of 77 for a paper of 130 grams per square meter, and of the order of 94 for a paper of 300 grams per square meter.
L'homogénéité de l'aspect visuel de la surface des différentes feuilles est évaluée à l'aide de l'appareil Khéops commercialisé par Techpap. Cet appareil muni d'une caméra CCD effectue une analyse d'image des différences de couleur et luminosité de la surface et donne une valeur globale d'autant plus faible que l'homogénéité est grande.The homogeneity of the visual appearance of the surface of the different leaves is evaluated using the Khéops device sold by Techpap. This device equipped with a CCD camera performs an image analysis of the differences in color and luminosity of the surface and gives an overall value which is lower the greater the homogeneity.
La blancheur de la surface des différentes feuilles est mesurée selon la norme ISO 11475 en l'absence d'éclairement ultraviolet.The whiteness of the surface of the various sheets is measured according to ISO standard 11475 in the absence of ultraviolet light.
Exemples comparatifs la,lc et exemples lb selon l'invention pour une application impression-écriture :Comparative examples 1a, 1c and examples 1b according to the invention for a print-write application:
Exemple la :Example 1a:
Une feuille ultra-opaque selon l'art antérieur la est constituée d'un papier support bijet machine à papier dont l'un est une composition papetière grise pour apporter l'opacité et dont l'autre est une composition papetière blanche ; ce bijet, sur la face externe du jet blanc, est couché par procédé à lame acier d'une couche pigmentée blanche mélange de 90 % de carbonate de calcium et de 10 % de latex styrène butadiène pour conférer à ladite feuille la l'état de surface nécessaire à un usage impression-écriture sur la face couchée.An ultra-opaque sheet according to the prior art la consists of a bijet paper machine support paper, one of which is a gray paper composition to provide opacity and the other of which is a white paper composition; this bijet, on the external face of the white jet, is coated by steel blade process with a white pigmented layer mixture of 90% calcium carbonate and 10% styrene butadiene latex to give said sheet the state of surface necessary for printing-writing use on the coated side.
Exemple lb :Example lb:
Une feuille ultra-opaque selon l'invention lb, de poids par mètre carré analogue à la feuille la, est réalisée à partir d'un papier monojet de poids par mètre carré égal à 100 g/m2 de couleur grise dont la coloration opacifiante est ici apportée par le procédé de couchage à rideau sous forme d'une précouche sur chaque face deAn ultra-opaque sheet according to the invention lb, of weight per square meter similar to the sheet la, is produced from a single-ply paper of weight per square meter equal to 100 g / m 2 of gray color whose opacifying coloring is brought here by the curtain coating process in the form of a prelayer on each face of
10 grammes par mètre carré, ladite couche comportant en sec 0,05 part de noir de carbone pour 100 parts d'un mélange de 90 % de carbonate de calcium et de 10% de latex styrène butadiène.10 grams per square meter, said layer comprising in dry 0.05 part of black carbon for 100 parts of a mixture of 90% calcium carbonate and 10% styrene butadiene latex.
Ce monojet coloré est ensuite couché, toujours par procédé de couchage à rideau, sur chacune de ses deux faces de 10 grammes par mètre carré d'une couche pigmentée blanche identique à celle utilisée dans l'exemple la.This colored monojet is then coated, still by curtain coating process, on each of its two faces of 10 grams per square meter of a white pigmented layer identical to that used in example la.
Exemple le :Example on:
Une autre feuille ultra-opaque le, non conforme à l'invention, est réalisée par couchage à lame acier du monojet coloré de la feuille lb, avec 10 grammes par mètre carré sur chaque face de la même couche pigmentée blanche impression-écriture que la feuille lb.Another ultra-opaque sheet 1c, not in accordance with the invention, is produced by coating with a steel blade the colored monojet of the sheet lb, with 10 grams per square meter on each side of the same white pigmented print-write layer as the sheet lb.
Les caractéristiques optiques des trois feuilles sont comparées dans le tableauThe optical characteristics of the three sheets are compared in the table
La feuille lb selon l'invention, bien que de poids par mètre carré légèrement inférieur est à la fois plus ultra-opaque, plus blanche et d'état de surface plus homogène que la feuille la de l'art antérieur fabriquée à partir d'un procédé industriel plus complexe (bijet).The sheet 1b according to the invention, although of slightly lower weight per square meter, is both more ultra-opaque, whiter and more homogeneous in surface finish than the sheet 1a of the prior art made from a more complex industrial process (bijet).
La feuille monojet le réalisée avec couchage procédé lame acier ne présente pas une homogénéité de surface suffisante. Exemple comparatif 2a et exemple 2b selon l'invention pour une application Carte à Jouer :The single-ply sheet produced with the steel blade process coating does not have sufficient surface homogeneity. Comparative example 2a and example 2b according to the invention for a Playing Card application:
Exemple 2a :Example 2a:
Une feuille ultra-opaque selon l'art antérieur 2a est constituée de deux jets de papier couché blanc contrecollés avec une colle noire représentant en sec 0,24 grammes par mètre carré de noir de carbone.An ultra-opaque sheet according to the prior art 2a consists of two jets of white coated paper laminated with a black glue representing in dry 0.24 grams per square meter of carbon black.
Exemple 2b :Example 2b:
Une feuille ultra opaque selon l'invention 2b, de poids par mètre carré identique à la feuille 2a, est réalisée à partir d'un papier monojet de poids par mètre carré 240 grammes de couleur gris-noire où la coloration opacifiante est apportée comme à l'exemple lb par une précouche sur chaque face de 5 grammes par mètre carré, ladite couche comportant en sec 0,5 part de noir de carbone pour 100 parts d'un mélange identique à celui utilisé dans l'exemple lb.An ultra opaque sheet according to the invention 2b, of weight per square meter identical to sheet 2a, is produced from a single-ply paper of weight per square meter 240 grams of gray-black color where the opacifying coloring is provided as in example lb by a precoat on each side of 5 grams per square meter, said layer comprising in dry 0.5 part of carbon black for 100 parts of a mixture identical to that used in example lb.
Ce monojet coloré est ensuite couché, toujours par procédé couchage à rideau, sur chacune de ses deux faces de 30 grammes par mètre carré d'une couche pigmentée blanche identique à celle utilisée dans l'exemple lb.This colored monojet is then coated, still by curtain coating process, on each of its two faces of 30 grams per square meter of a white pigmented layer identical to that used in example lb.
Les caractéristiques optiques des deux feuilles sont comparées dans le tableauThe optical characteristics of the two sheets are compared in the table
La feuille 2b selon l'invention, réalisée sans l'étape supplémentaire de contrecoUage, a le même niveau de qualité de surface (blancheur, homogénéité) que la feuille 2a de l'art antérieur. The sheet 2b according to the invention, produced without the additional counter-coating step, has the same level of surface quality (whiteness, homogeneity) as sheet 2a of the prior art.
Ces deux feuilles ont aussi la même ultra-opacité, mais la quantité de noir nécessaire est beaucoup plus faible pour la feuille 2b, ce qui représente un avantage économique appréciable du point de vue coût matière première et possibilité de recyclage. These two sheets also have the same ultra-opacity, but the quantity of black required is much lower for the sheet 2b, which represents an appreciable economic advantage from the point of view of raw material cost and possibility of recycling.

Claims

REVENDICATIONS
1) Feuille couchée ultra opaque caractérisée en ce qu'elle est constituée d'un support coloré réalisé à partir d'un monojet de matière, le dit support étant couché sur au moins une de ses faces d'une ou plusieurs couches pigmentées blanches.1) Ultra opaque coated sheet, characterized in that it consists of a colored support produced from a single jet of material, the said support being coated on at least one of its faces with one or more white pigmented layers.
2) Feuille selon la revendication précédente, caractérisée en ce qu'elle possède un indice d'ultra-opacité supérieur à 92, et de manière avantageuse supérieur ou égal à 94 dans le cas où son grammage est inférieur à 300 g/m2 et un indice d'ultra-opacité supérieur à 94, et de manière avantageuse supérieur ou égal à 98 dans le cas où son grammage est supérieur ou égal à 300 g/m2.2) Sheet according to the preceding claim, characterized in that it has an ultra-opacity index greater than 92, and advantageously greater than or equal to 94 in the case where its grammage is less than 300 g / m 2 and an ultra-opacity index greater than 94, and advantageously greater than or equal to 98 in the case where its grammage is greater than or equal to 300 g / m 2 .
3) Feuille selon la revendication 1 ou 2, caractérisée en ce qu'elle possède une blancheur mesurée selon la norme ISO 11475 supérieure à 75, et de préférence supérieure ou égale à 78.3) Sheet according to claim 1 or 2, characterized in that it has a whiteness measured according to ISO 11475 standard greater than 75, and preferably greater than or equal to 78.
4) Feuille selon l'une des revendications précédentes, caractérisée en ce que le monojet de matière est un monojet de papier à base de fibres cellulosiques.4) Sheet according to one of the preceding claims, characterized in that the material monojet is a paper monojet based on cellulosic fibers.
5) Feuille selon l'une des revendications 1 à 3, caractérisée en ce que le monojet de matière est un film plastique. 6) Procédé de fabrication d'une feuille selon l'une des revendications précédentes, caractérisé en ce que l'on réalise d'abord un support coloré à partir d'un monojet de matière, support que l'on enduit ensuite sur au moins une de ses faces avec une ou plusieurs couches pigmentées blanches.5) Sheet according to one of claims 1 to 3, characterized in that the monojet of material is a plastic film. 6) A method of manufacturing a sheet according to one of the preceding claims, characterized in that a colored support is first produced from a monojet of material, support which is then coated on at least one of its faces with one or more white pigmented layers.
7) Procédé selon la revendication précédente, caractérisé en ce que le dépôt de la ou des couches pigmentées blanches est réalisé au moyen d'une tête de couchage à rideau.7) Method according to the preceding claim, characterized in that the deposition of the white pigmented layer or layers is carried out by means of a curtain coating head.
8) Procédé selon la revendication 6 ou 7, caractérisé en ce que le monojet de matière est un papier à base de fibres cellulosiques.8) Method according to claim 6 or 7, characterized in that the monojet of material is a paper based on cellulosic fibers.
9) Procédé selon la revendication précédente, caractérisé en ce que l'opacification est obtenue par incorporation de pigments opacifiants dans la masse du papier.9) Method according to the preceding claim, characterized in that the clouding is obtained by incorporating clouding pigments in the mass of the paper.
10)Procédé selon la revendication 8, caractérisé en ce que l'opacification est obtenue par dépôt en surface du papier d'une précouche de pigments opacifiants soit au moyen d'une presse encoUeuse, soit au moyen d'un dispositif de couchage.10) Method according to claim 8, characterized in that the clouding is obtained by depositing on the surface of the paper a prelayer of pigments opacifiers either by means of a coating press or by means of a coating device.
11) Procédé selon la revendication précédente, caractérisé en ce que le dispositif de couchage utilisé pour déposer la précouche de pigments opacifiants est une tête de couchage à rideau, la dépose se faisant notamment simultanément et à l'aide de la même tête de couchage à rideau que lors de l'enduction de la ou des couches pigmentées blanches prévue à la revendication 7.11) Method according to the preceding claim, characterized in that the coating device used for depositing the pre-coat of opacifying pigments is a curtain coating head, the removal being done in particular simultaneously and using the same coating head at curtain only when coating the white pigmented layer (s) provided for in claim 7.
12) Procédé selon la revendication 6 ou 7, caractérisé en ce que le monojet de matière est un film plastique coloré ou un film plastique recouvert d'une précouche colorée opacifiante.12) Method according to claim 6 or 7, characterized in that the monojet of material is a colored plastic film or a plastic film covered with an opacifying colored precoat.
13)Procédé selon l'une des revendications 6 à 12, caractérisé en ce que la matière colorante utilisée est du noir de carbone.13) Method according to one of claims 6 to 12, characterized in that the coloring material used is carbon black.
14) Carte à jouer ultra opaque obtenue par le procédé selon l'une des revendications 6 à 13 ou comportant comme base, une feuille selon l'une des revendications 1 à 5. 14) Ultra-opaque playing card obtained by the method according to one of claims 6 to 13 or comprising as a base, a sheet according to one of claims 1 to 5.
EP20030715030 2002-01-25 2003-01-21 Highly-opaque layered sheet and the production method thereof Expired - Lifetime EP1472410B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0200948 2002-01-25
FR0200948A FR2835265B1 (en) 2002-01-25 2002-01-25 ULTRA-OPAQUE COATED SHEET AND MANUFACTURING METHOD THEREOF
PCT/FR2003/000182 WO2003062529A2 (en) 2002-01-25 2003-01-21 Highly-opaque layered sheet and the production method thereof

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EP1472410A2 true EP1472410A2 (en) 2004-11-03
EP1472410B1 EP1472410B1 (en) 2013-02-27

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MX357920B (en) 2013-01-10 2018-07-31 Rivera Carmona Dalila Non-transparent art paper which prevents ink seepage.
CN104594108A (en) * 2014-12-17 2015-05-06 金东纸业（江苏）股份有限公司 Preparation method of playing card paper, matrix paper and playing card paper

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CN1623020A (en) 2005-06-01
FR2835265A1 (en) 2003-08-01
WO2003062529A3 (en) 2004-03-11
BR0302830A (en) 2004-03-02
EP1472410B1 (en) 2013-02-27
CN100414043C (en) 2008-08-27
FR2835265B1 (en) 2004-07-02
WO2003062529A2 (en) 2003-07-31
AU2003219231A1 (en) 2003-09-02
US7364790B2 (en) 2008-04-29

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