EP0049672B1 - Coated papers and cardboards, and process for manufacturing them - Google Patents

Coated papers and cardboards, and process for manufacturing them Download PDF

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Publication number
EP0049672B1
EP0049672B1 EP19810401558 EP81401558A EP0049672B1 EP 0049672 B1 EP0049672 B1 EP 0049672B1 EP 19810401558 EP19810401558 EP 19810401558 EP 81401558 A EP81401558 A EP 81401558A EP 0049672 B1 EP0049672 B1 EP 0049672B1
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Patent type
Prior art keywords
paper
microspheres
characterised
cardboard
coating layer
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Expired
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EP19810401558
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German (de)
French (fr)
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EP0049672A1 (en )
Inventor
Sauveur Cremona
Joel Pijselman
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La Cellulose Du Pin
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La Cellulose Du Pin
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52Macromolecular coatings
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H19/00Coated paper; Coating material
    • D21H19/66Coatings characterised by a special visual effect, e.g. patterned, textured
    • D21H19/70Coatings characterised by a special visual effect, e.g. patterned, textured with internal voids, e.g. bubble coatings
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H21/00Non-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
    • D21H21/50Non-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 form
    • D21H21/52Additives of definite length or shape
    • D21H21/54Additives of definite length or shape being spherical, e.g. microcapsules, beads
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/502Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
    • B41M5/508Supports
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52Macromolecular coatings
    • B41M5/5254Macromolecular coatings characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/249921Web or sheet containing structurally defined element or component
    • Y10T428/249953Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249971Preformed hollow element-containing
    • Y10T428/249972Resin or rubber element
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/25Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/254Polymeric or resinous material
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/26Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/27Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
    • Y10T428/273Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.] of coating
    • Y10T428/277Cellulosic substrate
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31855Of addition polymer from unsaturated monomers
    • Y10T428/3188Next to cellulosic
    • Y10T428/31895Paper or wood
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31855Of addition polymer from unsaturated monomers
    • Y10T428/3188Next to cellulosic
    • Y10T428/31895Paper or wood
    • Y10T428/31906Ester, halide or nitrile of addition polymer
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31971Of carbohydrate
    • Y10T428/31989Of wood

Description

  • La présente invention concerne les papiers ou cartons à base de fibres cellulosiques. The present invention relates to paper or cardboard based on cellulosic fibers. Elle concerne plus particulièrement un nouveau papier ou carton comprenant au moins une couche permettant ou facilitant l'impression en héliogravure. It relates more particularly to a novel paper or paperboard comprising at least one layer enabling or facilitating rotogravure printing. Elle concerne encore un procédé de fabrication de ces papiers ou cartons. It also relates to a method of making these paper or paperboard.
  • Les papiers et cartons subissent généralement une enduction (ou couchage) afin d'améliorer notamment leurs propriétés mécaniques et/ou d'en permettre l'impression. Paper and paperboard generally undergo coating (or sleeping) to improve their particular mechanical and / or allow printing.
  • Les papiers ou cartons couchés connus présentent au moins une couche d'enduction contenant des pigments et des liants. Coated paper or paperboard known have at least one coating layer containing pigments and binders. Le pigment le plus couramment utilisé est une argile, tel le kaolin. The most commonly used pigment is clay, such as kaolin. Eventuellement d'autres pigments lui sont associés, tels le carbonate de calcium, l'oxyde de titane, l'hydrargilite, le talc, le sulfate de baryum. Optionally other pigments associated with it, such as calcium carbonate, titanium oxide, hydrargillite, talc, barium sulfate. Les pigments sont fixés au papier à l'aide de liants, par exemple un copolymère de styrène-butadiène, un polymère acrylique, un polymère d'acétate de vinyle, des liants naturels, de l'amidon, des protéines, des caséines, des alcools polyvinyliques, ou un mélange de ces corps. The pigments are fixed to the paper by means of binders, for example a styrene-butadiene copolymer, acrylic polymer, vinyl acetate polymer, natural binders, starch, proteins, casein, of polyvinyl alcohols, or a mixture thereof.
  • La couche d'enduction des papiers ou cartons couchés connus peut encore comprendre des agents dispersants ayant servi à sa fabrication à partir de compositions aqueuses. The coating layer of coated paper or paperboard may further comprise known dispersants used in its manufacture from aqueous compositions. De tels agents sont par exemple le pyrophosphate tétrasodique, l'hexamétaphosphate de sodium, les polyacrylates de bas poids moléculaire, à des taux compris entre 0,2 et 0,5 % en poids par rapport aux pigments. Such agents are, for example, tetrasodium pyrophosphate, sodium hexametaphosphate, low molecular weight polyacrylates, at rates between 0.2 and 0.5% by weight relative to the pigments.
  • La couche d'enduction peut également comprendre des agents susceptibles d'améliorer les propriétés de rétention de l'eau tels, la carboxyméthylcellulose, les alginates. The coating layer may also comprise agents to improve the water retention properties such, carboxymethylcellulose, alginates.
  • Les propriétés que doivent posséder les papiers ou cartons enduits différent selon le mode d'impression auquel ils sont destinés : héliogravure, offset, impression typographique, impression flexographique, sérigraphie, etc... The properties required of paper or paperboard coated different depending on the print mode which they are intended: gravure, offset, letterpress printing, flexographic printing, screen printing, etc ...
  • En héliogravure, l'encre est contenue dans de petites alvéoles et son transfert par capillarité sur le papier ou le carton enduit ne peut se faire que si le pourtour de chaque alvéole est en contact parfait avec ce dernier. In gravure printing, the ink is contained in small pockets and transferred by capillarity on paper or coated paperboard can be achieved if the perimeter of each cell is in perfect contact with the latter. Il importait donc d'utiliser un papier ou un carton couché d'excellent lissé. It was therefore important to use a paper or paperboard coated with excellent smoothness. Or le lissé obtenu par calandrage est d'autant plus élevé que la pression de la calandre est plus forte. But the smoothness obtained by calendering is even higher than the pressure of the grille is stronger. Il est cependant nécessaire de limiter la pression du calandrage afin de maintenir une porosité de couche suffisante pour l'imprimabilité du papier couché ou encore, dans le cas des cartons, pour ne pas affaiblir certaines caractéristiques physiques ou propriétés mécaniques comme l'épaisseur et/ou la rigidité. It is however necessary to limit the pressure of calendering to keep a porosity sufficient layer for the printability of the coated paper or, in the case of cartons, not to weaken certain physical characteristics or mechanical properties such as thickness and / or rigidity. Ou alors il faut utiliser un papier ou carton d'un grammage supérieur de l'ordre de 10 à 20 %. Or it is necessary to use a paper or paperboard of a higher basis weight of the order of 10 to 20%.
  • C'est pourquoi les papiers ou cartons couchés connus, c'est-à-dire enduits de compositions contenant des pigments minéraux, présentent généralement une aptitude médiocre à l'impression en héliogravure. Therefore coated paper or paperboard known, that is to say coating compositions containing inorganic pigments generally have a poor ability to rotogravure printing.
  • L'invention propose un nouveau papier ou carton couché ayant une excellente aptitude à l'impression en héliogravure, en même temps que de bonnes propriétés mécaniques, sans pour autant être d'un grammage excessif. The invention proposes a new paper or coated board with excellent printability in photogravure, along with good mechanical properties, without being excessive weight. Le papier ou carton selon l'invention comprend au moins une couche d'enduction contenant des microsphères creuses, expansées, remplies d'un gaz inerte c'est-à-dire qui n'est pas susceptible de réagir chimiquement avec les parois des microsphères. The paper or paperboard according to the invention comprises at least one coating layer containing hollow microspheres, expanded, filled with an inert gas that is to say which is not capable of reacting chemically with the microspheres walls .
  • On connaît d'après le document US-A-3 816 169, un substrat, par exemple du papier rendu opaque à l'aide d'une couche de revêtement comprenant des microsphères opacifiantes de faible diamètre, inférieur à 2 µm, contenant des pigments tels Ti0 2 . ART It is known the document US-A-3,816,169, a substrate, for example paper rendered opaque using a coating layer comprising opacifying microspheres of small diameter, less than 2 .mu.m, containing pigments such Ti0 2.
  • Les microsphères expansées selon l'invention présentent un diamètre de l'ordre de 25 µm environ. Expanded microspheres according to the invention have a diameter on the order of about 25 microns. Ces microsphères creuses procurent à la couche d'enduction une grande souplesse ou compressibilité, très supérieure à celle des couches classiques contenant des pigments minéraux ou à celle décrite dans le document US-A-3 816 169. Cette souplesse permet un contact continu entre le papier ou le carton couché et les alvéoles contenant l'encre lors de l'impression en héliogravure, sans qu'il soit nécessaire d'avoir un lissé excellent. These hollow microspheres to provide the coating layer flexibility or compressibility, much higher than that of conventional coatings containing inorganic pigments or as described in US-A-3 816 169. This flexibility allows continuous contact between the paper or coated board and the cells containing the ink in rotogravure printing, without the need to have excellent smoothness.
  • La couche d'enduction peut être une couche externe. The coating layer can be an outer layer. Dans ce cas cependant, la surface du papier ou carton couché présente un coefficient de frottement élevé qui peut être gênant lors des opérations de transformation en empêchant le glissement des feuilles enduites. In this case, however, the surface of the coated paper or paperboard has a high friction coefficient which can be annoying when processing operations in preventing slipping of the coated sheets. En outre, l'absorption des encres et vernis est importante, ce qui peut altérer la fraîcheur et le brillant de l'impression. In addition, the absorption of inks and varnish is large, which may impair the freshness and gloss of the print.
  • C'est pourquoi, avantageusement, la couche d'enduction contenant les microsphères est une sous-couche qui est recouverte d'une pellicule externe améliorant les propriétés superficielles du papier ou carton à savoir par exemple le glissement, le brillant. Therefore, advantageously, the coating layer containing the microspheres is a sub-layer which is covered with an outer skin improving the surface properties of paper or paperboard namely for example the slip, gloss. Cette pellicule externe est une couche connue, par exemple une couche d'enduction classique à base exclusive de pigments minéraux, un film d'un polymère organique chargé de pigments ou non, ou encore un film d'un polymère organique extrudé. This outer film layer is known, for example a conventional coating layer to exclusively based mineral pigments, a film of an organic polymer filled with pigments or not, or a film of an extruded organic polymer.
  • De préférence, cette couche externe est très mince, pour ne pas altérer la souplesse due à la couche d'enduction contenant les microsphères. Preferably, this outer layer is very thin, not to alter the flexibility due to the coating layer containing the microspheres.
  • Les microsphères entrant dans la composition de la couche compressible sont par exemple des microcapsules creuses dont la paroi souple est constituée d'un polymère susceptible de se ramollir par chauffage, tel le chlorure de polyvinylidène, le polystyrène, un copolymère à base de chlorure de vinylidène et d'acrylonitrile, contenant à l'intérieur un gaz inerte, par exemple l'isobutane, des hydrocarbures chlorofluorés, des dérivés chlorés, du gaz carbonique. The microspheres used in the composition of the compressible layer are for example hollow microcapsules of which the flexible wall is made of a polymer capable of softening by heating, such as polyvinylidene chloride, polystyrene, polyvinylidene chloride-based copolymer and acrylonitrile, containing therein an inert gas, for instance isobutane, chlorofluorinated hydrocarbons, chlorinated derivatives, carbon dioxide.
  • Suivant une caractéristique de l'invention, la couche d'enduction compressible contenant des microsphères peut avoir une épaisseur moyenne calculée de l'ordre de 2 à 50 µm et plus. According to one characteristic of the invention, the compressible coating layer containing the microspheres may have an average calculated thickness of the order of 2 to 50 microns and more.
  • Sous un des aspects de l'invention, la couche d'enduction compressible comprend des pigments parmi lesquels 1 à 100 % et de préférence 25 à 100 % en poids sont constitués de microsphères creuses remplies d'un gaz inerte, les autres pigments classiques pouvant être des pigments minéraux tels les argiles comme le kaolin, du carbonate de calcium, de l'oxyde de titane, de l'hydrargilite, du talc, du sulfate de baryum. Under one aspect of the invention, the compressible layer comprises coating pigments including 1 to 100% and preferably 25 to 100% by weight consist of hollow microspheres filled with an inert gas, other conventional pigments can be inorganic pigments such as kaolin clays, calcium carbonate, titanium oxide, hydrargillite, talc, barium sulfate.
  • La couche d'enduction compressible comprend également au moins un liant et éventuellement d'autres ingrédients comme les agents dispersants, les agents susceptibles d'améliorer les propriétés de rétention de l'eau, etc... The compressible coating layer also comprises at least one binder and optionally other ingredients such as dispersing agents, agents to improve the water retention properties, etc ...
  • Généralement, la couche d'enduction compressible a une masse de 1 à 10 g et de préférence de 2 à 5 g par m 2 de surface. Generally, the compressible layer has a coating weight of 1 to 10 g and preferably from 2 to 5 g per m 2 of surface.
  • Pour augmenter la souplesse du papier, on peut l'enduire sur une de ses faces de deux couches d'enduction et plus contenant des microsphères. To increase the flexibility of the paper, it can be coated on one of its faces with two layers of coating and containing microspheres.
  • Suivant une caractéristique de l'invention, le papier ou carton comprend une couche ou sous-couche d'enduction contenant des microsphères sur chacune de ses faces. According to one characteristic of the invention, the paper or paperboard comprises a layer or coating underlayer containing microspheres on each of its faces.
  • L'invention concerne également un procédé pour la fabrication de papiers ou de cartons enduits. The invention also relates to a method for the manufacture of paper or paperboard coated.
  • Selon le procédé, on enduit le papier ou carton sur une de ses faces ou sur les deux par une composition aqueuse contenant des polymères synthétiques sous forme de microsphères creuses renfermant un gaz inerte, expansibles à la chaleur, au moins un liant, le cas échéant d'autres pigments et d'autres ingrédients classiques comme cités précédemment. According to the method, the paper or paperboard is coated on one of its faces or both with an aqueous composition containing synthetic polymers in the form of hollow microspheres containing an inert gas, expanding to the heat, at least one binder, if appropriate other pigments and other conventional ingredients as mentioned above. On sèche ensuite le papier ou carton enduit à la température de ramollissement des microsphères creuses, comprise généralement entre 80 °C et 120 °C environ. Then dried paper or paperboard coated with the softening temperature of the hollow microspheres, generally between 80 ° C and 120 ° C. Ce séchage dure quelques secondes, ou plus le cas échéant, et il a pour effet de provoquer l'expansion des microsphères. This drying takes several seconds, or longer if necessary, and it has the effect of causing the expansion of the microspheres.
  • Dans une variante, on utilise une composition aqueuse contenant des microsphères déjà expansées au préalable après avoir subi un traitement thermique. Alternatively, an aqueous composition already containing expanded microspheres beforehand after having undergone a heat treatment.
  • On obtient une couche parfaitement unie et homogène qui présente une souplesse très supérieure à celle des couches classiques à base de pigments minéraux. One obtains a perfectly smooth and homogeneous layer having a much greater flexibility than conventional layers based on inorganic pigments.
  • Après séchage, le papier ou carton couché est avantageusement recouvert d'une pellicule externe puis peut encore subir une opération de finissage telle que le calandrage, le brossage ou le surglaçage. After drying, the paper or coated board is advantageously covered with an outer film may then undergo further finishing operation such as calendering, brushing or surglaçage.
  • Pour la mise en oeuvre du procédé d'enduction, on peut utiliser par exemple la lame d'air, la size- press, la coucheuse Champion, la coucheuse Massey, la râcle traînante. For the implementation of the coating process can be used for example the air gap, the size- press, coater Champion, Massey coater, the trailing doctor blade.
  • D'autres caractéristiques et avantages apparaîtront dans la description suivante d'exemples selon l'invention. Other features and advantages will become apparent from the following description of examples of the invention.
  • Exemples 1 à 11 Examples 1 to 11
  • On prépare des compositions aqueuses d'enduction avec les composants et dans les proportions indiquées dans le tableau 1. Les quantités sont exprimées pour 100 parties pondérales en poids de pigment (microsphères plus pigments minéraux). Aqueous coating compositions were prepared with the components and in the proportions indicated in Table 1. The quantities are expressed by weight per 100 parts by weight of pigment (most inorganic pigments microspheres). Les microsphères sont constituées de capsules creuses en chlorure de polyvinylidène ou en un copolymère de chlorure de vinylidène et d'acrylonitrile contenant de l'isobutane. The microspheres are comprised of hollow capsules polyvinylidene chloride or a copolymer of vinylidene chloride and acrylonitrile containing isobutane. On utilise par exemple les microsphères commercialisées sous l'appelation SARAN par la Société DOW CHEMICAL ou encore les microsphères PVDC de la Société suédoise KEMANORD. the microspheres sold under the appellation SARAN example used by the Company Dow Chemical or PVDC microspheres of the Swedish Society KEMANORD. Les microsphères expansibles ont un diamètre moyen de 5 wm. The expandable microspheres have an average diameter of 5 wm.
  • Les compositions contiennent un liant qui est un latex de styrène-butadiène. The compositions contain a binder which is a latex of styrene-butadiene. Elles contiennent un épaississant tel la carboxyméthyl-cellulose désignée par l'abréviation CMC dans le tableau. They contain a thickener such carboxymethyl cellulose designated by the abbreviation CMC in the table. Elles contiennent également un agent lubrifiant tel un stéarate. They also contain a lubricant such as a stearate. Elles contiennent enfin un dispersant tel un polyacrylate. Finally, they contain a dispersant such as a polyacrylate.
  • L'extrait sec des compositions aqueuses est généralement compris entre 10 et 30 % en poids. The solids content of the aqueous compositions is generally between 10 and 30% by weight.
    Figure imgb0001
    Figure imgb0002
  • Un papier de 150 g/cm 2 , constitué de deux jets de pâte, à savoir 100 g de pâte blanchie et 50 g de pâte écrue est enduit sur le côté de la pâte blanchie à l'aide des compositions aqueuses selon le tableau 1, préparées au préalable. A paper of 150 g / cm 2, consisting of two jets of pulp, namely 100 g of bleached pulp and 50 g of unbleached pulp is coated on the side of the bleached pulp with the aqueous compositions according to Table 1, prepared beforehand.
  • Le papier enduit est ensuite séché par une batterie de sécheurs à une température de 90 °C pendant 15 secondes environ, ce qui a pour effet de ramollir les microsphères et de permettre leur dilatation jusqu'à un diamètre moyen de l'ordre de 25 um environ puis il subit un calandrage par passage entre deux cylindres d'un diamètre de 25 cm exerçant une force de 20 kg (196 N) par cm linéaire. The coated paper is then dried by a drying battery at a temperature of 90 ° C for about 15 seconds, which has the effect of the microspheres soften and allow their expansion to an average diameter of about 25 um about then it undergoes a calendering by passage between two rolls with a diameter of 25 cm with a force of 20 kg (196 N) per cm linear.
  • Lorsqu'avantageusement la couche contenant des microsphères est revêtue d'une pellicule externe, on peut équiper la calandre d'un docteur d'eau qui distribue régulièrement, au moment du calandrage par exemple, une émulsion aqueuse de polyéthylène à raison de 2 g/m 2 . Lorsqu'avantageusement the layer containing the microspheres is coated with an outer skin, can be equipped the shell of a doctor water which distributes regularly at the time of calendering for example, an aqueous emulsion of polyethylene in an amount of 2 g / m 2.
  • On peut encore extruder un film d'un polymère organique par exemple du polyéthylène puis l'appliquer sur la couche contenant les microsphères. Can still extruding a film of an organic polymer for example polyethylene then applied to the layer containing the microspheres.
  • Le papier est ensuite conditionné à la température de 23 °C dans une atmosphère à 50 % d'humidité relative. The paper is then conditioned at the temperature of 23 ° C in an atmosphere at 50% relative humidity.
  • Exemples 12 à 14 Examples 12-14
  • Ces exemples concernent des papiers couchés à l'aide de compositions aqueuses classiques ne contenant que des pigments minéraux et autres ingrédients comme indiqués dans le tableau 2. These examples relate to coated papers using conventional aqueous compositions containing only mineral pigments and other ingredients as shown in Table 2.
    Figure imgb0003
  • Les papiers enduits selon les exemples 1 à 14 sont examinés au point de vue de leur aptitude à l'impression héliographique. The papers coated in Examples 1 to 14 were examined in terms of their suitability for gravure printing.
  • Pour effectuer ces tests, on utilise un appareil mettant en oeuvre le principe du procédé d'impression héliographique. To perform these tests, using an apparatus embodying the principle of the gravure printing method. Un appareil convenable est l'appareil IGT de « l'institut Voor Graphische Technick tno Amsterdam •. A suitable device is the device IGT "the Institute Voor Graphische Technick • tno Amsterdam. Après avoir raclé l'excès d'encre d'une molette gravée en creux, on imprime dynamiquement le papier couché à tester dans des conditions de pression (300 N/3 cm et 600 N/3 cm ) et de vitesse (100 cm/s) données. After scraping excess ink from a dial intaglio, is dynamically printed coated paper to be tested in conditions of pressure (300 N / 3 cm and 600 N / 3 cm) and speed (100 cm / s) data.
  • Trois types de gravure sont réunies sur la même molette : une plage unie à trame conventionnelle, une plage dégradée à trame, des lignes de points. Three types of engraving are met on the wheel itself: a united beach conventional frame, a beach degraded frame, dotted lines.
  • On examine les papiers sur lesquels a été effectuée l'impression. We examine the papers on which was performed printing.
  • L'impression en plage unie ne permet qu'un jugement qualitatif difficile à exprimer. Printing plain beach allows only difficult to express qualitative judgment. Par contre les impressions en lignes de points et en plage dégradée montrent la bonne aptitude à l'impression des papiers selon l'invention. As against the prints lines of dots and deteriorated beach show good printability of paper according to the invention.
  • L'impression en lignes de points détermine l'aptitude à l'impression par le nombre de points manquants ; The dotted lines in print determines the printability by the number of missing points; plus le nombre de points manquants est faible, meilleure est l'impression. plus the number of missing dots is low, the better the impression. Sur les papiers selon les exemples 1 à 11, on observe zéro point manquant. On paper in Examples 1 to 11, zero is observed missing the point. Sur les papiers 12, 13 et 14, on observe respectivement 6, 11 et 12 points manquants. On the papers 12, 13 and 14, respectively observed 6, 11 and 12 missing points.
  • L'impression en plage dégradée détermine l'aptitude à l'impression par la distance entre le début de l'impression, en partant du ton fort, et le premier point de simili non imprimé ; The degraded printing range determines the printability by the distance between the start of printing, from the strong tone, and the first non-printed halftone point; plus la distance est grande, meilleure est l'uni des impressions. the greater the distance, the better the united impressions. Sur les papiers selon les exemples 1 à 11, il n'y a jamais de point de simili non imprimé. On paper in Examples 1 to 11, there has never not printed halftone dot. Pour les papiers réalisés selon les exemples 12 à 14, on note respectivement 24, 45 et 35 mm. For papers produced in Examples 12 to 14, there is respectively 24, 45 and 35 mm.

Claims (12)

1. Paper or cardboard based on cellulosic fibres, the paper or cardboard being covered by at least one coating layer containing pigments, suitable for printing such as by heliogravure, characterised in that the coating layer contains hollow, expanded microspheres filled with a gaz which is chemically inert to their walls, having a diameter of the order of about 25 ¡.Lm, rendering the layer flexible and compressible.
2. Paper or cardboard according to claim 1, characterised in that the microspheres are present in an amount from 25 % to 100 % of the weight of the pigments.
3. Paper or cardboard according to one of claims 1 and 2, characterised in that the coating layer containing the microspheres has a mass from 1 to 10 g/m2 and preferably 2 to 5 g/m2.
4. Paper or cardboard according to one of claims 1 to 3, characterised in that the polymer forming the walls of the microspheres is selected from polyvinylidene chloride, polystyrene, a copolymer based on vinylidene chloride and acrylonitrile, and in that the inert gas contained in the capsules is selected from isobutane, chlorofluoro hydrocarbons, chlorinated derivatives and carbon dioxide.
5. Paper or cardboard according to claim 4, characterised in that the microspheres are of polyvinylidene chloride and they contain isobutane.
6. Paper or cardboard according to claim 4, characterised in that the microspheres are of a copolymer based on vinylidene chloride and acrylonitrile and in that they contain isobutane.
7. Paper or cardboard according to one of claims 1 to 6, characterised in that the coating layer containing the microspheres contains other ingredients such as binders, catalysts and mineral pigments.
8. Paper or cardboard according to one of claims 1 to 7, characterised in that the coating layer comprising the hollow microspheres filled with inert gas is an under-layer covered with an exterior envelope improving the surface properties of the paper or cardboard.
.9. Paper or cardboard according to claim 8, characterised in that the exterior envelope is selected from a coating layer of known type based exclusively on mineral pigments, a film of organic polymer which may or may not be filled with pigments, and an extruded film.
10. Method of making paper or cardboard covered with at least one coating layer according to one of claims 1 to 9, characterised in that the paper or cardboard is coated by an aqueous composition containing expansible microspheres and the coated layer is heated to expand the microspheres.
11. Method according to claim 10, characterised in that the coating layer is covered by an exterior envelope.
12. Method according to claim 11, characterised in that after drying the coated paper or cardboard is subjected to a finishing operation such as calandering, brushing or spupercalandering.
EP19810401558 1980-10-08 1981-10-08 Coated papers and cardboards, and process for manufacturing them Expired EP0049672B1 (en)

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US8377526B2 (en) 2005-03-11 2013-02-19 International Paper Company Compositions containing expandable microspheres and an ionic compound, as well as methods of making and using the same
US8382945B2 (en) 2008-08-28 2013-02-26 International Paper Company Expandable microspheres and methods of making and using the same
US8460512B2 (en) 2002-09-13 2013-06-11 International Paper Company Paper with improved stiffness and bulk and method for making same

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FR2675405B1 (en) * 1991-04-18 1994-10-14 Elce Ets Method for making a planar support whose one side has anti-slip properties and the other exhibits adhesive properties and thus obtained support.
US5360825A (en) * 1992-02-14 1994-11-01 Sony Corporation Pulp molding
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US5932515A (en) * 1997-11-25 1999-08-03 The Mead Corporation Recording paper incorporating hollow spherical plastic pigment
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US20060231227A1 (en) * 2000-01-26 2006-10-19 Williams Richard C Paper and paper articles and method for making same
FR2849657B1 (en) * 2003-01-03 2005-07-15 Arjo Wiggins Leaf possessing an iridescent appearance, and process for its manufacture
RU2365696C2 (en) * 2004-08-25 2009-08-27 Дау Глобал Текнолоджиз Инк. Production of paper using latex with agglomerated hollow particles
US20060060317A1 (en) * 2004-09-20 2006-03-23 International Paper Company Method to reduce back trap offset print mottle
DE102005057836B3 (en) * 2005-12-03 2007-03-08 Corvus Beschichtungssysteme Gmbh Adhesion-improving material, useful for paper and copying paper, comprises fixing agent and polycarboxylic acid as dispersant, also microcapsule coating mass containing it
CA2651264C (en) * 2006-05-05 2014-07-08 International Paper Company Paperboard material with expanded polymeric microspheres
RU2471632C2 (en) * 2007-02-21 2013-01-10 Джонс Мэнвилл Юроп Гмбх New composite materials, methods of their production and application
EP2167728A1 (en) * 2007-06-18 2010-03-31 Dow Global Technologies Inc Paper coating compositions, coated papers, and methods
RU2520338C1 (en) * 2013-05-29 2014-06-20 Константин Сергеевич Сахаров Paper laminate (versions)
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US8317976B2 (en) 2000-01-26 2012-11-27 International Paper Company Cut resistant paper and paper articles and method for making same
US8460512B2 (en) 2002-09-13 2013-06-11 International Paper Company Paper with improved stiffness and bulk and method for making same
US8790494B2 (en) 2002-09-13 2014-07-29 International Paper Company Paper with improved stiffness and bulk and method for making same
US8377526B2 (en) 2005-03-11 2013-02-19 International Paper Company Compositions containing expandable microspheres and an ionic compound, as well as methods of making and using the same
US8382945B2 (en) 2008-08-28 2013-02-26 International Paper Company Expandable microspheres and methods of making and using the same
US8679294B2 (en) 2008-08-28 2014-03-25 International Paper Company Expandable microspheres and methods of making and using the same

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ES506092A0 (en) 1982-09-01 application
ES8304245A1 (en) 1982-09-01 application
FI813100L (en) 1982-04-09 grant
US4477518A (en) 1984-10-16 grant
FI813100A (en) application
FR2491514B1 (en) 1985-02-22 grant
FR2491514A1 (en) 1982-04-09 application
DE3169705D1 (en) 1985-05-09 grant
EP0049672A1 (en) 1982-04-14 application
FI68102B (en) 1985-03-29 application

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