Industrial machine presses; Industrial paper cutting machines; Industrial paper folding machines; Paper coating machines; Paper jogging machines for industrial use; Paper reeling machines; Paper shredding machines; Paper trimming machines for commercial or industrial use; Papermaking machines; Printing presses
(1) Machines pour la fabrication du papier; presses (machines à usage industriel); presses d'imprimerie; machines et équipements de machines pour l'industrie papetière.
4.
METHOD FOR OPTIMIZING THE REFINING ENERGY DURING AN OPERATION OF REFINING OF A FIBER COMPOSITION
The present invention concerns a method of optimization of the refining energy supplied by a refiner to a fiber composition during a refining operation, the refiner comprising at least two refining disks separated from each other by an adjustable gap. The invention also relates to a refining system adapted to the implementation of such a method.
A method for depositing, on a substrate, a composition of cellulosic fibers, includes preparing an aqueous suspension SA comprising at least cellulosic fibers, spraying, at a pressure no lower than 3 MPa, the aqueous suspension SA onto a substrate, wherein the spraying is carried out by means of a nozzle having a size between 0.05 mm and 3 mm, and obtaining a fibrous deposit DF on the substrate. The aqueous suspension SA includes at least 3% by weight of cellulosic fibers relative to the total weight of the aqueous suspension SA, and the aqueous suspension SA and the fibrous deposit DF have dry matter with identical composition.
D21H 11/18 - Fibres hautement hydratées, gonflées ou aptes à être fibrillées
D21H 17/00 - Matériaux non fibreux ajoutés à la pâte caractérisés par leur constitution; Matériaux d'imprégnation du papier caractérisés par leur constitution
D21H 17/68 - Composés insolubles dans l'eau, p.ex. charges ou pigments siliceux, p.ex. argiles
D21C 5/00 - Autres procédés pour obtenir de la cellulose, p.ex. cuisson des linters de coton
D21C 9/00 - Post-traitement de la pâte de cellulose, p.ex. de la pâte de bois, ou des linters de coton
7.
PROCESS FOR PREPARING FUNCTIONALIZED CELLULOSE FIBERS
a/b/c/d/d/ functionalizing the cellulose fibers, by reaction between the cellulose fibers and the hydrophobic agent, in the presence of the dispersant, at a temperature T4 above or equal to the melting point of the hydrophobic agent. The present invention also relates to a process for preparing a hydrophobic film from these functionalized cellulose fibers.
D21H 11/18 - Fibres hautement hydratées, gonflées ou aptes à être fibrillées
D21H 11/20 - Fibres modifiées chimiquement ou biochimiquement
D21H 17/18 - Composés organiques non macromoléculaires contenant des éléments autres que le carbone et l'hydrogène formant de nouveaux composés in situ, p.ex. dans la pâte ou le papier, par réaction chimique avec lui-même, ou avec d'autres substances ajoutées
D21H 17/44 - Composés macromoléculaires synthétiques obtenus par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carbone contenant des groupes ioniques cationiques
D21H 19/12 - Couches sans pigments appliquées sous forme d'une solution utilisant de l'eau comme solvant unique, p.ex. en présence de composés acides ou alcalins
8.
METHOD FOR DEPOSITING A CELLULOSIC FIBER COMPOSITION ON A SUBSTRATE
The present invention relates to a method for depositing, on a substrate, a composition of cellulosic fibers, comprising the following steps: / preparing an aqueous suspension SA comprising at least cellulosic fibers, 2/ spraying, at a pressure no lower than 3 MPa, the aqueous suspension SA onto a substrate, wherein the spraying is carried out by means of a nozzle having a size between 0.05 mm and 3 mm, 3/ obtaining a fibrous deposit DF on the substrate, the aqueous suspension SA comprising at least 3% by weight of cellulosic fibers relative to the total weight of the aqueous suspension SA, the aqueous suspension SA and the fibrous deposit DF having dry matter with identical composition.
D21H 19/34 - Couches sans pigments appliquées sous une forme autre que la solution aqueuse définie dans le groupe comprenant de la cellulose ou ses dérivés
D21H 19/38 - Couches contenant des pigments caractérisées par les pigments
A device for separating the constituents of a fluid medium includes an element for separating the constituents, helping to define, upstream and/or downstream from the separation element, a closed chamber, to which at least one conduit is connected. The conduit includes at least one activatable sealing device, the activation of which is capable of at least partially closing and opening the conduit. The device also includes a controller for the activation of the sealing device, controlling the closing and opening, at least partially, of the conduit cyclically, at a frequency greater than 0.008 Hz.
CENTRE TECHNIQUE DE L'INDUSTRIE DES PAPIERS, CARTONS ET CELLULOSES (France)
SAICA EL (France)
KADANT LAMORT (France)
Inventeur(s)
Fourest, Eric
Neyret, Christophe
Lascar, Alain
Andres, Serge
Dury, Benoit
Huber, Patrick
Abrégé
The present invention relates to a process for recovering starch present in paper and/or cardboard, by: [a] preparation of an aqueous suspension A of fibres, [b] treatment of the aqueous suspension A and formation of two fractions: - fraction B containing water, fibres, fines and fillers; - fraction C containing water and dissolved and/or colloidal starch, fines and fillers, [c] separation of fraction C into two fractions: - fraction D containing water and dissolved starch, - fraction E containing water and colloidal starch, fines and fillers, [d] use or treatment of fraction D, [e] use or exploitation of fraction E.
CENTRE TECHNIQUE DE L'INDUSTRIE, DES PAPIERS, CARTONS ET CELLULOSES (France)
KADANT LAMORT (France)
Inventeur(s)
Vaulot, Frederic
Lascar, Alain
Carre, Bruno
Cochaux, Alain
Leroy, Laurence
Abrégé
The present invention relates to a binder composition containing water, plant fibers and mineral fillers, - the weight ratio between the plant fibers and the mineral fillers being comprised between 99/1 and 2/98, - the plant fibers and the mineral fillers having been refined simultaneously, wherein the refined fibers have a mean size of between 10 and 700 µm, and wherein the refined fibers at least partially embed the refined mineral fillers.
D21C 5/00 - Autres procédés pour obtenir de la cellulose, p.ex. cuisson des linters de coton
D21C 9/00 - Post-traitement de la pâte de cellulose, p.ex. de la pâte de bois, ou des linters de coton
D21H 11/18 - Fibres hautement hydratées, gonflées ou aptes à être fibrillées
D21H 17/00 - Matériaux non fibreux ajoutés à la pâte caractérisés par leur constitution; Matériaux d'imprégnation du papier caractérisés par leur constitution
D21H 17/67 - Composés insolubles dans l'eau, p.ex. charges ou pigments
12.
BINDER COMPOSITION BASED ON PLANT FIBERS AND MINERAL FILLERS, PREPARATION AND USE THEREOF
CENTRE TECHNIQUE DE L'INDUSTRIE, DES PAPIERS, CARTONS ET CELLULOSES (France)
KADANT LAMORT (France)
Inventeur(s)
Vaulot, Frédéric
Lascar, Alain
Carre, Bruno
Cochaux, Alain
Leroy, Laurence
Abrégé
The present invention relates to a binder composition containing water, plant fibers and mineral fillers, - the weight ratio between the plant fibers and the mineral fillers being comprised between 99/1 and 2/98, - the plant fibers and the mineral fillers having been refined simultaneously, wherein the refined fibers have a mean size of between 10 and 700 µm, and wherein the refined fibers at least partially embed the refined mineral fillers.
D21C 5/00 - Autres procédés pour obtenir de la cellulose, p.ex. cuisson des linters de coton
D21C 9/00 - Post-traitement de la pâte de cellulose, p.ex. de la pâte de bois, ou des linters de coton
D21H 11/18 - Fibres hautement hydratées, gonflées ou aptes à être fibrillées
D21H 17/67 - Composés insolubles dans l'eau, p.ex. charges ou pigments
D21H 17/00 - Matériaux non fibreux ajoutés à la pâte caractérisés par leur constitution; Matériaux d'imprégnation du papier caractérisés par leur constitution
(1) Screening systems, namely, filters as parts for paper machines used in the manufacturing of pulp, fiber, paper, board and tissue; Pressing machines for industrial use
filtering machines for use in paper recycling, paper stock preparation, pulp mills, paper de-inking; filters being parts of machines, namely, screens for use in paper recycling, paper stock preparation, pulp mills, paper de-inkings
A device (1) for separating the constituents of a fluid medium (M), comprising an element (3) for separating said constituents, helping to define, upstream and/or downstream from said separation element (3), a closed chamber (2), to which at least one conduit (C) is connected, characterised in that: - said conduit (C) comprises at least one activatable sealing means (5), the activation of which is capable of at least partially closing and opening said conduit (C); and in that - said device (1) comprises means (7) for controlling the activation of said sealing means (5), capable of controlling the closing and opening, at least partially, of said conduit (C), cyclically, at a frequency greater than 0.008 Hz.
A device (1) for separating the constituents of a fluid medium (M), comprising an element (3) for separating said constituents, helping to define, upstream and/or downstream from said separation element (3), a closed chamber (2), to which at least one conduit (C) is connected, characterised in that: - said conduit (C) comprises at least one activatable sealing means (5), the activation of which is capable of at least partially closing and opening said conduit (C); and in that - said device (1) comprises means (7) for controlling the activation of said sealing means (5), capable of controlling the closing and opening, at least partially, of said conduit (C), cyclically, at a frequency greater than 0.008 Hz.
The serial multistage flotation process for eliminating hydrophobic particles from a stream of materials to be treated includes a step of introducing into one stage a layer of materials to be treated, originating either from a higher state or directly from the inlet of the system. There is an aeration step in which air extracted from the lower stages is mixed, diffused and dispersed in the layer of materials to be treated then escapes to the higher stage or to a foam discharge zone. After the aeration step, there is a deaeration step in which air is no longer introduced into the layer of materials to be treated before the departure thereof from one stage and that enables the discharge of the dispersed air to the higher stages or in the case of the highest stage to foam discharge zone. There is also a step of recovering the deaerated material.
The present invention relates to a serial multistage flotation process for eliminating hydrophobic particles from a stream of materials to be treated, comprising a step of introducing into one stage a layer of materials to be treated, originating either from a higher stage (3, 3A, 3B, 3C) or directly from the inlet of the system (E1), the process comprising an aeration step in which the air extracted from the lower stages is mixed, diffused and dispersed in the layer of materials to be treated then escapes to the higher stage or to a foam discharge zone (3E). It is characterized in that it comprises, after the aeration step: a deaeration step in which air is no longer introduced into the layer of materials to be treated before the departure thereof from one stage and that enables the discharge of the dispersed air to the higher stages (3, 3A, 3B, 3C) or in the case of the highest stage (3), to a foam discharge zone (3E), and a step of recovering the deaerated material. The present invention also relates to a linear multistage flotation facility specially equipped to implement the process according to the invention.
Deinking process with a view to recycling wastepaper, consisting in mixing the wastepaper with water and, through a pulping operation (1), in disintegrating this wastepaper and obtaining a paper pulp, followed by an operation of fractionating this paper pulp into a retentate fraction (8) containing contaminants, and a filtrate fraction (9) containing free or small-sized inks and adhesives, characterized in that: - the retentate fraction (8) is subjected to an operation (3) for detachment and/or division of the contaminants; - the filtrate fraction (9) is subjected to a multistage flotation (4) for the entrainment, in at least a first stage, of one portion at least of the free or small-sized inks and adhesives by air bubbles originating from a lower flotation stage; - during this multistage flotation operation (4), at a stage lower than the first stage, the retentate fraction (8), on exiting the contaminant detachment and/or division operation (3), is mixed with the filtrate fraction (9).
