PAPER AND PAPERBOARD PRODUCTS

The present invention includes products such as paper and cardboard products comprising a cellulose-containing substrate and a top layer comprising microfibrous cellulose and inorganic particulates， methods of making such paper and cardboard products， and methods of producing such paper and cardboard products. It relates to related uses. The microfibrous cellulose and inorganic particulate material is applied at the stage in the process where the wet substrate is formed on the wire of the paper machine， thereby avoiding additional coating drying as well as additional cost of a wider range of equipment and machinery. The microfibrous cellulose attracts inorganic particulates onto the substrate surface and imparts sufficient pore structure and strength sufficient to render the composite suitable for printing and other end-use needs， thereby allowing inorganic on wet paper or cardboard substrate surfaces when properly applied. It facilitates the application of fine particles. The present invention is directed to products， such as paper and paperboard products， comprising a substrate containing cellulose and top ply comprising microfibrillated cellulose and inorganic particulate， to methods of making such paper and paperboard products， and associated uses of such paper and paperboard products. The microfibrillated cellulose and inorganic particulate material are applied at the stage when the wet substrate is in the process of being formed on the wire of a papermaking machine， thereby avoiding the additional cost of more extensive equipment and machinery as well as in separate drying of a coating. The microfibrillated cellulose facilitates the application of inorganic particulate onto the surface of a wet paper or paperboard substrate when applied thusly， by trapping the inorganic particulate on the surface of the substrate and by giving the composite sufficient strength and a suitable pore structure to make it suitable for printing and other end-use demands. The present invention is directed to products， such as paper and paperboard products， comprising a substrate containing cellulose and top ply comprising microfibrillated cellulose and inorganic particulate， to methods of making such paper and paperboard products， and associated uses of such paper and paperboard products. The microfibrillated cellulose and inorganic particulate material are applied at the stage when the wet substrate is in the process of being formed on the wire of a papermaking machine， thereby avoiding the additional cost of more extensive equipment and machinery as well as in separate drying of a coating. The microfibrillated cellulose facilitates the application of inorganic particulate onto the surface of a wet paper or paperboard substrate when applied thusly， by trapping the inorganic particulate on the surface of the substrate and by giving the composite sufficient strength and a suitable pore structure to make it suitable for printing and other end-use demands.