Abstract: The present invention relates to a method for fractionation of a highly refined cellulose pulp into a fine fraction and coarse fraction, said method comprising: a) providing a highly refined cellulose pulp suspension comprising highly refined cellulose pulp having a Schopper-Riegler (SR) number in the range of 40-98 as determined by standard ISO 5267-1 and a content of fibers having a length >0.2 mm of at least 7 million fibers per gram based on dry weight; b) subjecting the highly refined cellulose pulp suspension to dewatering in a belt filter; c) collecting the dewatered retentate as the coarse fraction; and d) collecting the filtrate as the fine fraction; wherein the collected fine fraction contains 2-50 wt % of the solids of the highly refined cellulose pulp suspension provided in step a).

Abstract: The present invention relates to a method for manufacturing a barrier film comprising highly refined cellulose, said method comprising: a) providing a highly refined cellulose pulp suspension comprising highly refined cellulose pulp having a Schopper-Riegler (SR) number in the range of 40-98 as determined by standard ISO 5267-1 and a content of fibers having a length >0.2 mm of at least 7 million fibers per gram based on dry weight, at a consistency in the range of 0.1-1.

Abstract: The invention discloses a paperboard comprising a base ply, a top ply, and an intermediate layer disposed in-between the at least one base ply and the top ply. The intermediate layer comprises pigment and microfibrillated cellulose (MFC). The application of an intermediate layer comprising pigment and MFC in-between the base ply and the top ply gives rise to improved optical properties of the paperboard, even when using an uncoated top ply having a low grammage This makes it possible to reduce the grammage of the top ply and still obtain good optical properties.

Abstract: The present invention relates to a method for preparing a surface-treated fibrous material comprising nanocellulose, in which a fibrous material is surface treated with an organic acid or salt thereof. Fibrous materials as such are also provided. The present technology allows improved Water Vapor Transmission Rates (WVTR) for the fibrous material, while operating on an industrial scale.

Abstract: The present invention relates to packaging materials in the form of laminates comprising a paper or paperboard substrate and a barrier film. The barrier film is based on microfibrillated cellulose. The laminate comprises a paper or paperboard substrate, wherein the substrate is in contact with a first adhesive layer, which is in contact with a second adhesive layer, which is in contact with the barrier film. The present invention also relates to methods for manufacturing such laminates.

Abstract: The present invention relates to a method for manufacturing a multilayer machine glazed paper comprising highly refined cellulose fibers, the method comprising the steps of: forming a first wet web by applying at least one first pulp suspension comprising highly refined cellulose fibers on a first wire; partially dewatering the first wet web to obtain a first partially dewatered web; forming a second wet web by applying at least one second pulp suspension comprising highly refined cellulose fibers on a second wire; partially dewatering the second wet web to obtain a second partially dewatered web; joining the first and second partially dewatered web to obtain a multilayer web; optional dewatering the multilayer web in a dewatering unit, and glazing the multilayer web in at least one glazing unit to obtain a multilayer machine glazed paper comprising highly refined cellulose fibers. The invention also relates to a multiply MG paper produced according to the method.

Abstract: The present invention relates to a barrier film for a paper or paperboard-based packaging material, said barrier film comprising: a substrate; a vacuum coating layer having a thickness in the range of 1-500 nm disposed on the substrate; and a protective coating layer comprising a crosslinked water-soluble polymer disposed on the vacuum coating layer. The present invention further relates to a paper or paperboard based packaging material and containers comprising the barrier film, and to a method for manufacturing the barrier film.

Abstract: The present invention relates to a process for manufacturing a film comprising high amounts of microfibrillated cellulose (MFC), having haptic properties. According to the present invention, a wet web comprising MFC is formed, followed by addition of particles having an average diameter of at least 1 ?m to the wet web, followed by dewatering and/or drying. The wet web may be formed for example by wet laid or cast forming methods. The particles may be added to the wet web for example by cast coating or spraying.

Abstract: The present invention relates to a method for manufacturing a web or film comprising highly refined cellulose fibers in a paper machine, the method comprising the steps of: a) forming a wet web by applying an aqueous pulp suspension comprising highly refined cellulose fibers on a wire; and b) dewatering the wet web on the wire to obtain a dewatered web comprising highly refined cellulose fibers, wherein the dewatering comprises membrane assisted dewatering using a gas permeable membrane temporarily applied to the wet web, wherein the gas permeable membrane has a lower air permeability than the wire.

Abstract: The present invention relates to a method for manufacturing a film comprising microfibrillated cellulose wherein the method comprises the steps of; providing a suspension comprising a microfibrillated cellulose, adding an enzyme to the suspension, mixing the enzyme with the suspension to form a mixture, applying said mixture to a wire to form a fibrous web and drying said web to form said film. The present invention further relates to a film comprising microfibrillated cellulose having good barrier properties.

Abstract: The present invention relates to a method for manufacturing a multilayer film comprising microfibrillated cellulose (MFC) in a paper-making machine, the method comprising the steps of: a) forming a bottom web layer by applying a first pulp suspension comprising at least 50% by dry weight of cellulose based fibrous material having an SR (Schopper-Riegler) value in the range of 18-75 on a bottom web wire; b) forming or applying an intermediate web layer formed from a second pulp suspension comprising at least 50% by dry weight of MFC having an SR value in the range of 80-100 on the bottom web layer; c) applying a top web layer formed from a third pulp suspension comprising at least 50% by dry weight of cellulose based fibrous material having an SR (Schopper-Riegler) value in the range of 18-75 on the intermediate web layer to form a multilayer web; and d) dewatering, and optionally drying, the formed multilayer web to obtain a multilayer film comprising MFC.

Abstract: The present invention relates to a method for manufacturing a film comprising highly refined cellulose fibers in a paper-making machine, the method comprising the steps of: a) providing an aqueous pulp suspension comprising at least 20% by dry weight of highly refined cellulose fibers having an SR (Schopper-Riegier) value in the range of 80-100 at a consistency in the range of 0.8-3 wt % and; b) deflocculating and diluting the aqueous pulp suspension to a lower consistency in the range of 0.1-1.5 wt % by injecting the aqueous pulp suspension into an aqueous stream using a high shear mixer to obtain a diluted aqueous pulp suspension; and c) feeding the diluted aqueous pulp suspension to a headbox of the paper-making machine.

Abstract: The present invention relates to a method for dewatering a web comprising microfibrillated cellulose, wherein the method comprises the steps of: providing a suspension comprising between 50 wt-% to 100 wt-% of microfibrillated cellulose based on total dry weight, forming a fibrous web of said suspension on a support wherein said web has a dry content of 1-25% by weight, applying a dewatering felt into direct contact with the fibrous web, conducting said fibrous web, arranged between said dewatering felt and said support, through at least one shoe press equipment, drying the dewatered web to form a film which film has an Oxygen Transmission Rate (OTR) value (23° C., 50% RH) below 100 cc/m2/24 h according to ASTM D-3985.

Abstract: The present invention relates to a method for producing a machine glazed paper comprising microfibrillated cellulose, wherein the method comprises the steps of: providing a suspension comprising between 0.1 wt-% to 50 wt-% of microfibrillated cellulose based on total dry weight, forming a fibrous web of said suspension on a wire wherein said web has a dry content of 1-25% by weight, dewatering the fibrous web in at least one dewatering unit, glazing at least one side of the dewatered fibrous web in a glazing unit to form the machine glazed paper. The invention further relates to a MG paper produced according to the method.

Abstract: The present invention relates to a method for the production of an adhesive component wherein said method comprises the following steps: providing a suspension comprising starch granules, adding a suspension comprising microfibrillated cellulose to the suspension comprising starch granules, drying the starch granules and microfibrillated cellulose suspension to a dry content above 70 wt-% to form said adhesive component. The invention also relates to an adhesive, a corrugated board, paper and paperboard comprising said adhesive and to the adhesive component produced according to the method.

Abstract: The present invention relates to a water-resistant fibrous material, such as flexible sheet, paper or paperboard, comprising a foam-formed fibrous ply, wherein said foam-formed fibrous ply has been subjected to grafting with a fatty acid halide to render the foam-formed fibrous ply water-resistant. The present invention further relates to a method for manufacturing the water-resistant fibrous material.

Abstract: The present invention relates to a method for manufacturing a polymer coated cellulose based substrate useful as a barrier film, said method comprising the steps of: a) providing a cellulose based substrate comprising 50-99 wt % highly refined cellulose fibers based on the total dry weight of the cellulose based substrate; b) preparing an aqueous foam from an aqueous solution of a foam forming polymer; c) applying the aqueous foam to at least one surface of the cellulose based substrate; and d) collapsing the aqueous foam to form a polymer coating on the cellulose based substrate.

Abstract: The present invention relates to a method for producing a film comprising nanocellulose, which method comprises: providing a suspension comprising 50-100 weight-% of nanocellulose based on total dry weight; forming a fibrous web of said suspension on a non-porous support; providing a press fabric comprising a web-side first surface and an opposite second surface, wherein said press fabric comprises a woven first fabric layer arranged in the press fabric as a layer providing said web-side first surface such that said press fabric has a woven surface structure at said web-side first surface; applying said web-side surface of said press fabric into direct contact with said web; wet-pressing said web by conducting said web, arranged between said press fabric and said non-porous support, through a pressing equipment, and drying the dewatered web so as to form said film. The invention further relates to a film produced from said method.

Abstract: The present invention relates to a method for manufacturing a multilayer film comprising highly refined cellulose fibers, the method comprising the steps of: a) forming a first wet web by applying a first pulp suspension comprising highly refined cellulose fibers on a first wire; b) partially dewatering the first wet web to obtain a first partially dewatered web; c) forming a second wet web by applying a second pulp suspension comprising highly refined cellulose fibers on a second wire; d) partially dewatering the second wet web to obtain a second partially dewatered web; e) joining the first and second partially dewatered web to obtain a multilayer web; and f) further dewatering, and optionally drying, the multilayer web to obtain a multilayer film comprising highly refined cellulose fibers; wherein at least one of said first and second pulp suspension comprises lignin at a concentration in the range of 0.1-50 wt %, based on the total dry weight of the pulp suspension.

Abstract: The present invention relates to a method for manufacturing a multilayer film comprising highly refined cellulose fibers, the method comprising the steps of: a) forming a first wet web by applying a first pulp suspension comprising highly refined cellulose fibers on a first wire; b) partially dewatering the first wet web to obtain a first partially dewatered web; c) forming a second wet web by applying a second pulp suspension comprising highly refined cellulose fibers on a second wire; d) partially dewatering the second wet web to obtain a second partially dewatered web; e) applying a binder between the first and second partially dewatered web and joining the first and second partially dewatered web to obtain a multilayer web; and f) further dewatering, and optionally drying, the multilayer web to obtain a multilayer film comprising highly refined cellulose fibers.