Abstract: The present invention relates to an arrangement for determining the permeability of a sample, said arrangement comprising a source of fluid medium arranged such that at least a fraction of said medium can be brought into contact with a first surface of said sample to be tested; means for measuring the electrical properties at a second surface of said sample, wherein the second surface is opposite said first surface of said sample; and a controller for recording said electrical properties, and for determining the transmission rate of the fluid medium through the sample based on the recorded electrical properties.

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 present invention is directed to a film or coating comprising a fiber material, wherein at least 60% by weight of said fiber material is microfibrillated cellulose, said film or coating also comprising at least 1% by weight of extractives from wood bark or cork wood. The invention is also directed to products, such as packaging materials, using or incorporating said film or coating. Such packaging materials are for example laminates or multi-layer structures. The films or coatings according to the present invention having advantageous barrier properties and are therefore particularly suitable for sensitive objects that need to be packaged in a controlled or modified atmosphere. The present invention is also directed to a composition comprising a fiber material, wherein at least 60% by weight of said fiber material is microfibrillated cellulose, said composition also comprising at least 1% by weight of extractives from wood bark or cork wood.

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.

Abstract: The present invention relates to a biobased barrier film for a paper or paperboard-based packaging material, said barrier film comprising: a substrate layer and a coating layer disposed on at least one surface of the substrate layer, wherein said substrate layer has a grammage in the range of 1-60 g/m2 and comprises at least 50 wt % of highly refined cellulose pulp based on the dry weight of the substrate layer, and wherein said coating layer has a grammage in the range of 1-15 g/m2 and comprises at least 50 wt % of a film forming modified starch and 0.1-10 wt % of a biobased lubricant, based on the dry weight of the coating layer.

Abstract: The present invention relates to a coating composition for coating of paper or paperboard, said composition comprising: a pigment, a binder, an optical brightening agent (OBA), a colorant, and a sugar alcohol, and to paper or paperboard coated with at least one layer of the coating composition. The present invention further relates to a method for preparing said coating composition and to an OBA premix useful in the method of preparing the coating composition, said premix comprising an OBA, a sugar alcohol, and optionally a colorant, wherein the OBA and sugar alcohol together make up at least 10% by weight, preferably at least 20% by weight, based on the total weight of solids in the premix.

Abstract: A method of producing a microfibrillated cellulose. MFC. film from an MFC dispersion, comprises subjecting a wet MFC film (F) on a support to at least one drying step to form a dry MFC film (F?). measuring at least one parameter indicative of a concentration of at least one component, such as an additive or an impurity, and performing at least one of the tasks: i) adjusting at least one production parameter which influences the concentration of said at least one component in response to said at least one parameter. and ii) recording said at least one parameter for each of said data points to provide a chemical map of the dry MFC film (F?). comprising a plurality of data points which are each associated with a respective position on the dry MFC film (F?).

Abstract: The present invention relates to a method for producing a laminate (8) comprising a paper substrate and a microfibrillated cellulose (MFC) layer. An MFC suspension comprising 25-90 weight-% of MFC and 10-50 weight-% of a filler component is provided. The suspension has a dry content of 2.5-50 weight-%. A wet MFC layer (1) is formed by casting the suspension on a metal belt support (2). A paper substrate having a Gurley Hill air permeability value of less than 10000 s/100 ml is provided and joined with the wet MFC layer positioned on the metal belt support to form a laminate structure (7). The laminate structure positioned on the metal belt support is subjected to water removal to form the laminate. The water removal comprises at least one drying step which comprises drying by at least one non-contact drying device (9), wherein the metal belt support is heated during the at least one drying step.

Abstract: The present invention relates to a process for manufacturing a barrier substrate, comprising the steps of: —providing a web comprising at least one first layer, which first layer comprises at least 30 weight-% highly refined cellulose fibers having a Schopper Riegler value of 60-95 SR # and/or at least 30 weight-% microfibrillated cellulose (MFC), as calculated on the total dry weight of said first layer, which web has a first side and a second side and which web exhibits an air resistance (Gurley) of at least 1000 s/100 ml, preferably at least 2000 s/100 ml, as measured according to ISO 5636-5, —providing a heated roll or a heated belt, —applying at least one first composition comprising a polymer dispersed or dissolved in an aqueous medium on the first side of the web while the web is in contact with the heated roll or belt, in a first coating step, thereby providing the web with a first barrier layer forming a barrier coated web, —optionally drying said web provided with the first barrier layer in a drying

Abstract: The present invention relates to a barrier paper or barrier film for a food or liquid packaging laminate, said barrier paper or barrier film comprising: a substrate layer comprising a highly refined cellulose composition comprising fibers obtained from used beverage cartons (UBC), and a polymeric gas barrier coating disposed on at least one side of the substrate layer.

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 producing a laminate comprising a paper or paperboard substrate and a microfibrillated cellulose (MFC) film. A first web comprising a paper or paperboard substrate is provided. A second web of an MFC film is provided, wherein the MFC film has: a) a content of MFC of 50-100 weight-% based on total dry weight; b) a moisture content of 5-20 weight-%, c) a ratio of a machine direction tensile index and a cross direction tensile index of 0.8-1.4. The MFC film is further dried to a moisture content of less than 4 weight-%. The first web and the second web are joined, after the further drying, using at least one adhesive layer provided between the webs so as to form the laminate. The MFC film has a moisture content of less than 4 weight-% at the joining. The invention relates also to a laminate and a packaging material comprising the laminate.

Abstract: The present invention relates to a method for producing a laminate comprising a paper or paperboard substrate and a microfibrillated cellulose (MFC) film. A first web comprising a paper or paperboard substrate is provided. A second web of an MFC film is provided, wherein the MFC film has: a) a content of MFC of 50-100 weight-% based on total dry weight; b) a moisture content of 5-20 weight-%, c) a ratio of a machine direction tensile index and a cross direction tensile index of 0.8-1.4. The first web and the second web are joined using at least one adhesive layer provided between the webs so as to form the laminate. The MFC film of the laminate is further dried to a moisture content of less than 4 weight-%. The invention relates also to a laminate and a packaging material comprising the laminate.

Abstract: The present invention relates to method for manufacturing a paperboard based packaging laminate, said method comprising: a) providing a paperboard base layer. b) providing a vacuum coated film layer. c) applying an adhesive composition to the paperboard base layer and/or the vacuum coated film layer. d) laminating a surface of the paperboard base layer to a surface of the vacuum coated film layer using the adhesive composition in a press nip. such that the adhesive composition forms an adhesive tie layer between the paperboard base layer and the vacuum coated film layer, to form a laminate. wherein the position of the press nip is adjusted in a direction perpendicular to the laminated surfaces during the lamination to compensate for changes in curl in the formed laminate.

Abstract: The present invention relates to a highly refined cellulose pulp (HRC) composition for preparation of barrier papers or films, said composition comprising: 50-99 wt % HRC having a Schopper-Riegler number (SR)>70, as measured according to the standard ISO 5267-1, and 1-50 wt % of compression refined cellulose pulp having a Schopper-Riegler number (SR)<30, as measured according to the standard ISO 5267-1, and a water retention value (WRV)>120%, as measured according to the standard ISO 23714, based on the total dry weight of the HRC composition. The invention further relates to an HRC paper or film and a multilayer material comprising the HRC composition.

Abstract: The present invention is directed to a process for manufacturing a film or coating comprising high amounts of cellulosic nanomaterial. According to the present invention, a screen printing press, such as a rotary screen press, is used to create a film or coating comprising cellulosic nanomaterial. One benefit of the present process is that the suspension used in the printing process has a high dry content and high viscosity, thereby facilitating the process for manufacturing a film or coating comprising high amounts of cellulosic nanomaterial.

Abstract: The invention discloses a paperboard for packaging of a heat-sealable packaging material comprising: —a paperboard substrate comprising a first and a second side, —a first and an optional second dispersion coating layer on the first side, which first and optional second dispersion coating layer provides a barrier against at least one of liquid, moisture, grease and gas, —an extrusion coated barrier layer comprising a polyolefin, wherein the first and optional second dispersion coating layer is applied between the paperboard substrate and the extrusion coated barrier layer, and wherein the coat weight of the extrusion coated barrier layer is less than 15 gsm. The packaging material according of the invention minimizes the amount of plastic coating, but still provides the needed barrier properties for the packaging of food and/or liquid. The packaging material has especially been shown to provide a longer shelf life for food items packed in a packaging made from the material.

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 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 multiply paperboard for use in food or liquid packaging laminates comprising fibers obtained from used beverage cartons (UBC), said multiply paperboard comprising: a first outer ply, a second outer ply, and at least one intermediate ply sandwiched between the first and second outer ply, wherein said first and second outer ply comprise less than 5 wt % fibers obtained from UBC, and wherein said intermediate ply comprises 5-70 wt % fibers obtained from UBC. The present invention relates to a method for manufacturing such multiply paperboard and a food or liquid packaging laminate comprising such multiply paperboard.