A METHOD FOR MANUFACTURING A COATED PAPER OR PAPERBOARD PRODUCT

The present invention relates to a method for manufacturing a coated paper or paperboard product, said method comprising: a) providing a paper or paperboard substrate having a grammage of at least 100 g/m2, a density below 900 kg/m3, and a moisture content of at least 3.5 wt%, as determined accordin...

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Bibliographische Detailangaben
Hauptverfasser:	HEISKANEN, Isto, NORDSTRÖM, Tommi
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL IMPREGNATING OR COATING OF PAPER INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM METALLURGY PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PERFORMING OPERATIONS PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TEXTILES TRANSPORTING TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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Beschreibung
Zusammenfassung:	The present invention relates to a method for manufacturing a coated paper or paperboard product, said method comprising: a) providing a paper or paperboard substrate having a grammage of at least 100 g/m2, a density below 900 kg/m3, and a moisture content of at least 3.5 wt%, as determined according to ISO 638, said paper or paperboard substrate having a first main surface and a second main surface, b) forming a first water vapor barrier layer on the first main surface of the paper or paperboard substrate, said first water vapor barrier layer comprising a thermoplastic polymer, c) forming a second water vapor barrier layer on the second main surface of the paper or paperboard substrate, said second water vapor barrier layer comprising a thermoplastic polymer, and d) forming a vacuum coating layer on said first water vapor barrier layer to obtain the coated paper or paperboard product. La présente invention concerne un procédé de fabrication d'un produit en papier ou en carton couché, ledit procédé comprenant : a) la fourniture d'un substrat en papier ou en carton dont le grammage est d'au moins 100 g/m2, dont la densité est inférieure à 900 kg/m3 et dont la teneur en humidité est d'au moins 3,5 % en poids, tel que déterminé selon la norme ISO 638, ledit substrat de papier ou de carton présentant une première surface principale et une seconde surface principale ; b) la formation d'une première couche barrière à la vapeur d'eau sur la première surface principale du substrat de papier ou de carton, ladite première couche barrière à la vapeur d'eau comprenant un polymère thermoplastique ; c) la formation d'une seconde couche barrière à la vapeur d'eau sur la seconde surface principale du substrat de papier ou de carton, cette seconde couche barrière à la vapeur d'eau comprenant un polymère thermoplastique ; et d) la formation d'une couche de revêtement sous vide sur cette première couche barrière à la vapeur d'eau afin d'obtenir le produit de papier ou de carton couché.