Abstract

The present invention relates to a method for mechanically processing cellulose fibres in aqueous suspension by compression in a mixer (1) comprising a body (10) defining a mixing chamber (11), the wall of which forms a fixed compression surface (12), and at least one mixing arbor (20) positioned in the mixing chamber (11) and comprising a rotationally mobile shaft (21) and a plurality of mixing elements (22) fixed to the shaft (21), projecting radially from the shaft, and each equipped with a rotationally mobile compression surface (23). In said method, the compression surfaces (23) of the mixing elements (22) face the compression surface (12) of the mixing chamber (11) so as to define between them compression zones (ZC) for the suspension of fibres (2) circulating between the body (10) and the mixing arbor (20). The compression surfaces (23) of the mixing elements (22) have a compression profile of which the radius relative to the shaft (21) varies according to the angular position of said shaft, so as to compress the suspension of fibres (2) in said compression zones (ZC) as said mixing arbor (12) rotates.

IPC Classes  ?

• D21D 1/20 - Methods of refining
• D21D 1/34 - Other mills or refiners
• D21D 1/38 - Other mills or refiners with horizontal shaft

Abstract

The present invention relates to a composite cellulose material, comprising: —a layer of a cellulose material, —a starch-based reinforcement grid which is positioned on at least one surface of the layer of cellulose material, the reinforcement grid comprising a plurality of meshes which are delimited by grid wires, the composite cellulose material having a relief in three dimensions comprising folds in the positioning zones of the reinforcement grid, and relief bumps on either side of the plane of the grid which are delimited by the folds.

IPC Classes  ?

• D21H 27/02 - Patterned paper
• D21H 27/10 - Packing paper
• D21H 27/20 - Flexible structures being applied by the user, e.g. wallpaper
• D21H 19/54 - Starch

Abstract

The present invention relates to a method for solubilizing and regenerating cellulose.

IPC Classes  ?

• C08B 15/02 - OxycelluloseHydrocelluloseCellulose hydrate
• C08B 15/04 - Carboxycellulose, e.g. prepared by oxidation with nitrogen dioxide
• C08B 16/00 - Regeneration of cellulose

Abstract

The present invention relates to a method for solubilizing and regenerating cellulose.

IPC Classes  ?

• C08B 15/02 - OxycelluloseHydrocelluloseCellulose hydrate
• C08B 15/04 - Carboxycellulose, e.g. prepared by oxidation with nitrogen dioxide
• C08B 16/00 - Regeneration of cellulose

Abstract

The present invention relates to a composite cellulose material, comprising: - a layer of a cellulose material, - a starch-based reinforcement grid which is positioned on at least one surface of the layer of cellulose material, the reinforcement grid comprising a plurality of meshes which are delimited by grid wires, the composite cellulose material having a relief in three dimensions comprising folds in the positioning zones of the reinforcement grid, and relief bumps on either side of the plane of the grid which are delimited by the folds.

IPC Classes  ?

• D21H 27/00 - Special paper not otherwise provided for, e.g. made by multi-step processes
• D21H 27/20 - Flexible structures being applied by the user, e.g. wallpaper
• B65D 75/40 - Packages formed by enclosing successive articles, or increments of material, in webs, e.g. folded or tubular webs, or by subdividing tubes filled with liquid, semi-liquid, or plastic materials

Abstract

The invention concerns a method for manufacturing 100 a suspension of cellulose nanofibrils from an aqueous suspension of cellulose fibres comprising the following steps: - chemical treatment 110, in a reactor, of the aqueous suspension of cellulose fibres by at least one functionalising agent, the chemical treatment being configured to functionalise the cellulose fibres at a modification rate that is higher, indeed strictly higher, than 1.0 mmol/g, and - mechanical treatment 120, in a twin-screw extruder, of the aqueous suspension of functionalised cellulose fibres, each screw of the extruder comprising at least two fibrillation segments. This optimised method makes it possible to produce a suspension of cellulose nanofibrils of good quality, with a high dry matter content, and while consuming less energy than the methods of the prior art.

IPC Classes  ?

• C08B 15/02 - OxycelluloseHydrocelluloseCellulose hydrate
• C08L 1/04 - OxycelluloseHydrocellulose

Abstract

The invention relates to a process for manufacturing a laminated material (S) comprising a fibrillated cellulose layer, characterized in that it comprises the following steps: (a) depositing a suspension (1) of fibrillated cellulose on a filtration membrane (2) and draining the suspension through that membrane so as to form a wet layer of fibrillated cellulose (A) having a dryness, that is to say a ratio between the mass of dry matter and the total mass of the fibrillated cellulose layer, of between 5% and 18%; (b) transferring the wet layer (A) under pressure to an at least partially hydrophilic surface of a substrate (B), so as to form the laminated material (S); (c) drying the laminated material. The invention also relates to a device for implementing the process.

IPC Classes  ?

• B01D 71/10 - CelluloseModified cellulose
• B01D 67/00 - Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
• D21F 11/04 - Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibreboard production, on paper-making machines of the Fourdrinier type paper or board consisting of two or more layers
• D21H 27/30 - Multi-ply
• D21H 11/18 - Highly hydrated, swollen or fibrillatable fibres
• B32B 37/18 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only
• B32B 37/20 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of continuous webs only
• B32B 29/08 - Corrugated paper or cardboard
• B32B 37/22 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of both discrete and continuous layers
• D21F 5/04 - Drying on cylinders on two or more drying cylinders
• D21F 9/02 - Complete machines for making continuous webs of paper of the Fourdrinier type
• F26B 13/08 - Machines or apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a sinuous or zig-zag path using rollers
• D21F 9/00 - Complete machines for making continuous webs of paper
• B32B 38/16 - DryingSofteningCleaning
• B32B 38/00 - Ancillary operations in connection with laminating processes

Abstract

The invention relates to a process for manufacturing a laminated material (S) comprising a fibrillated cellulose layer, characterized in that it comprises the following steps: (a) depositing a suspension (1) of fibrillated cellulose on a filtration membrane (2) and draining the suspension through that membrane so as to form a wet layer of fibrillated cellulose (A) having a dryness, that is to say a ratio between the mass of dry matter and the total mass of the fibrillated cellulose layer, of between 5% and 18%; (b) transferring the wet layer (A) under pressure to an at least partially hydrophilic surface of a substrate (B), so as to form the laminated material (S); (c) drying the laminated material. The invention also relates to a device for implementing the process.

IPC Classes  ?

• B01D 67/00 - Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
• B01D 71/10 - CelluloseModified cellulose
• B32B 23/02 - Layered products essentially comprising cellulosic plastic substances in the form of fibres or filaments
• B32B 37/10 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using direct action of vacuum or fluid pressure
• B32B 38/18 - Handling of layers or the laminate
• D21F 9/00 - Complete machines for making continuous webs of paper
• D21F 11/14 - Making cellulose wadding, filter- or blotting paper
• F26B 5/14 - Drying solid materials or objects by processes not involving the application of heat by applying pressure, e.g. wringingDrying solid materials or objects by processes not involving the application of heat by brushingDrying solid materials or objects by processes not involving the application of heat by wiping
• F26B 13/28 - Arrangements of devices using drying processes not involving heating for applying pressureArrangements of devices using drying processes not involving heating for brushingArrangements of devices using drying processes not involving heating for wiping

Abstract

The invention relates to a process for manufacturing a laminated material (S) comprising a fibrillated cellulose layer, characterized in that it comprises the following steps: (a) depositing a suspension (1) of fibrillated cellulose on a filtration membrane (2) and draining the suspension through that membrane so as to form a wet layer of fibrillated cellulose (A) having a dryness, that is to say a ratio between the mass of dry matter and the total mass of the fibrillated cellulose layer, of between 5% and 18%; (b) transferring the wet layer (A) under pressure to an at least partially hydrophilic surface of a substrate (B), so as to form the laminated material (S); (c) drying the laminated material. The invention also relates to a device for implementing the process.

IPC Classes  ?

• B01D 67/00 - Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
• B01D 71/10 - CelluloseModified cellulose
• B32B 23/02 - Layered products essentially comprising cellulosic plastic substances in the form of fibres or filaments
• D21F 9/00 - Complete machines for making continuous webs of paper
• D21F 11/14 - Making cellulose wadding, filter- or blotting paper
• F26B 5/14 - Drying solid materials or objects by processes not involving the application of heat by applying pressure, e.g. wringingDrying solid materials or objects by processes not involving the application of heat by brushingDrying solid materials or objects by processes not involving the application of heat by wiping
• F26B 13/28 - Arrangements of devices using drying processes not involving heating for applying pressureArrangements of devices using drying processes not involving heating for brushingArrangements of devices using drying processes not involving heating for wiping

Abstract

A process for treating a solid substrate coupled to a polyol, wherein said polyol bears free hydroxyl groups, comprising the grafting of at least one fatty acid having an aliphatic chain comprising at least 12 carbon atoms onto said solid substrate coupled to a polyol by esterification of at least one free hydroxyl group of said polyol.

IPC Classes  ?

• D21H 17/36 - PolyalkenylalcoholsPolyalkenylethersPolyalkenylesters
• C08J 7/12 - Chemical modification
• C08J 7/14 - Chemical modification with acids, their salts or anhydrides
• C08F 16/06 - Polyvinyl alcohol
• D21H 17/28 - Starch
• C03C 17/30 - Surface treatment of glass, e.g. of devitrified glass, not in the form of fibres or filaments, by coating with organic material with silicon-containing compounds

Abstract

Film having liquid-water, grease, gas and water-vapor barrier properties, comprising a PVA film grafted on the surface with a fatty acid.

IPC Classes  ?

• C08J 7/14 - Chemical modification with acids, their salts or anhydrides
• B05D 7/00 - Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
• C08J 5/18 - Manufacture of films or sheets
• D21H 19/20 - Coatings without pigments applied in a form other than the aqueous solution defined in group comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• D21H 19/32 - Coatings without pigments applied in a form other than the aqueous solution defined in group comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming a linkage containing silicon in the main chain of the macromolecule

Abstract

The invention also relates to a chromatogenous grafting process used in said machine.

IPC Classes  ?

• B05D 3/00 - Pretreatment of surfaces to which liquids or other fluent materials are to be appliedAfter-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
• B05C 9/12 - Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by groups , or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
• C08J 7/14 - Chemical modification with acids, their salts or anhydrides
• D21H 17/06 - AlcoholsPhenolsEthersAldehydesKetonesAcetalsKetals
• D21H 17/11 - Halides
• D21H 17/14 - Carboxylic acidsDerivatives thereof
• D21H 21/16 - Sizing or water-repelling agents
• D21H 25/02 - Chemical or biochemical treatment
• D21H 25/04 - Physical treatment, e.g. heating or irradiating

Abstract

A process for treating a solid substrate coupled to a polyol, wherein said polyol bears free hydroxyl groups, comprising the grafting of at least one fatty acid having an aliphatic chain comprising at least 12 carbon atoms onto said solid substrate coupled to a polyol by esterification of at least one free hydroxyl group of said polyol.

IPC Classes  ?

• C08J 7/12 - Chemical modification
• C08J 7/14 - Chemical modification with acids, their salts or anhydrides
• C08J 5/18 - Manufacture of films or sheets

Abstract

The invention relates to a machine for treating a moving substrate (S) having a hydroxylated surface (Fh), by means of chromatogenic grafting, including: a device (3) for applying a grafting reagent onto the hydroxylated surface (Fh) of the substrate, a heating roller (4) for developing the grafting reaction on the hydroxylated surface (Fh) of the substrate, said roller (4) being provided with a tension roller system (5a, 5b) for applying a surface of the substrate (S) against said heating roller (4), a device (6) for extracting the hydrochloric acid produced during the grafting reaction and a device (7) for applying an air knife to the treated surface of the substrate in order to remove the residual grafting reactant. The invention also relates to a chromatogenic grafting method implemented in said machine.

IPC Classes  ?

• C08J 7/14 - Chemical modification with acids, their salts or anhydrides
• D21H 21/16 - Sizing or water-repelling agents

Abstract

The invention relates to a machine for treating a moving substrate (S) having a hydroxylated surface (Fh), by means of chromatogenic grafting, including: a device (3) for applying a grafting reagent onto the hydroxylated surface (Fh) of the substrate, a heating roller (4) for developing the grafting reaction on the hydroxylated surface (Fh) of the substrate, said roller (4) being provided with a tension roller system (5a, 5b) for applying a surface of the substrate (S) against said heating roller (4), a device (6) for extracting the hydrochloric acid produced during the grafting reaction and a device (7) for applying an air knife to the treated surface of the substrate in order to remove the residual grafting reactant. The invention also relates to a chromatogenic grafting method implemented in said machine.

IPC Classes  ?

• C08J 7/14 - Chemical modification with acids, their salts or anhydrides
• D21H 21/16 - Sizing or water-repelling agents

Abstract

Film having liquid-water, grease, gas and water-vapor barrier properties, comprising a PVA film grafted on the surface with a fatty acid.

IPC Classes  ?

• B05D 3/02 - Pretreatment of surfaces to which liquids or other fluent materials are to be appliedAfter-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking

Abstract

Film ayant des propriétés barrières a l'eau, aux graisses, aux gaz et a la vapeur d'eau comprenant un film de PVA greffé en surface avec un acide gras.

IPC Classes  ?

• B32B 27/10 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of paper or cardboard
• B32B 27/16 - Layered products essentially comprising synthetic resin specially treated, e.g. irradiated
• B32B 27/30 - Layered products essentially comprising synthetic resin comprising vinyl resinLayered products essentially comprising synthetic resin comprising acrylic resin
• C08J 5/18 - Manufacture of films or sheets
• C08J 7/14 - Chemical modification with acids, their salts or anhydrides
• C08L 29/04 - Polyvinyl alcoholPartially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
• D21H 17/36 - PolyalkenylalcoholsPolyalkenylethersPolyalkenylesters
• D21H 21/14 - Non-fibrous material added to the pulp, characterised by its function, form or propertiesPaper impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper

Abstract

Film having liquid-water, grease, gas and water-vapour barrier properties, comprising a PVA film grafted on the surface with a fatty acid.

IPC Classes  ?

• B32B 27/10 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of paper or cardboard
• B32B 27/30 - Layered products essentially comprising synthetic resin comprising vinyl resinLayered products essentially comprising synthetic resin comprising acrylic resin
• C08J 7/14 - Chemical modification with acids, their salts or anhydrides