Abstract: A method for the production of highly refined or microfibrillated cellulose (MFC), comprising the steps of treating cellulosic fibres to remove at least a major part of the primary wall of the fibres, drying the treated fibres, rewetting the treated fibres, and disintegrating the wetted fibres by mechanical means to obtain the final product. Dried cellulosic pulp is produced as an intermediate product of the method, having an average fibre length of at least 0.4 mm, while less than 50% of the primary wall material of natural untreated fibres is left in the intermediate product. Instead of transporting large amounts of dilute MFC dispersion the invention enables transport of the dry intermediate product to the MFC end user, who would complete the process by turning the intermediate product to final MFC by use of standard disintegrating devices.

Abstract: The present invention provides a method for production of cellulose ethers in a high solids process substantially without use of organic solvents as reaction and/or washing medium. In the method of the invention the first alkalization step is carried out by using high solids content cellulose pulp and solid sodium hydroxide. This is followed by an etherification step where the solids content is preferably further increased and the use of solid etherification reactant is preferred. As no organic solvents are used as reaction media the invented method enables production of cellulose ethers directly from never dried pulp with significant savings in energy and investment costs. The method is especially suitable for the production of carboxymethyl cellulose sodium salt (CMC) with low degree of substitution (DS<0.3). The use of the resulting none or low water soluble carboxymethylated cellulosic fibres is suitable for example for producing microfibrillated cellulose.

Abstract: The present invention relates to a process for producing a dispersion comprising microfibrillated cellulose and nanoparticles wherein the process comprises the steps; providing a slurry comprising pre-treated cellulose fibers, adding nanoparticles to the slurry and treating the slurry by mechanical disintegration so that a dispersion comprising microfibrillated cellulose is formed in which the nanoparticles are being absorbed to the surface of the microfibrillated cellulose and/or being absorbed into the microfibrillated cellulose. The invention further relates to a dispersion produced according to the process, a paper or board product being coated with a coating comprising said dispersion and a paper or board product being produced from said dispersion as well as a composite comprising said dispersion.

Abstract: The present invention relates to a paper or paperboard product comprising a furnish wherein said furnish comprises a cationic polymer in an amount of above 1.5% by weight, an anionic polymer and microfibrillated cellulose. The invention further relates to a process for the production of said product.

Abstract: The present invention relates to a coated fiber based substrate comprising a dispersion coating wherein said dispersion coating comprises microfibrillated cellulose and colloidal particles of a polymer. The invention further relates to a package formed from said substrate, a dispersion coating and process for the production of mentioned substrate.

Abstract: The present invention relates to a paper or paperboard substrate having barrier properties which substrate comprises a first fiber based layer, a second layer comprising microfibrillated cellulose and a third layer comprising a polymer. The invention further relates to a process for the production of said substrate and a package formed of said substrate.

Abstract: The present invention relates to a process for producing a paper or paperboard product which process comprises the steps of, providing a furnish comprising fibers, adding starch to the furnish, adding microfibrillated cellulose to the furnish, conducting the furnish to a wire in order to form a web, wherein the starch and microfibrillated cellulose is added separately to the furnish.

Abstract: The present invention relates to a process for the production of a paper or paperboard comprising at least two plies wherein microfibrillated cellulose is added to the surface of a first ply and the other ply is attached to the first ply so that the microfibrillated cellulose located in between the plies. The invention further relates to a paper or board produced according to the method.