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WO/2021/001751A1 |
The present invention relates to a refined cellulose fiber composition useful as a strength enhancing agent for paper and paperboard, wherein the refined cellulose fiber composition has a Schopper-Riegler (SR) number in the range of 80-9...
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WO/2020/263296A1 |
A refining member including a refining body with a refining surface including first and second refiner bars separated by first and second refiner grooves. The first and second refiner bars extend from respective first and second radially...
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WO/2020/244938A1 |
A pulp treating arrangement (10) comprises a pulp treating apparatus (100), which receives first pulp (150), the first pulp (150) including at least one of the following: virgin pulp (152) 5and recycled pulp (154); performs a processing ...
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WO/2020/247110A1 |
A hub and a member, the member having a central opening. The hub is received in the member central opening. The hub has a center, and a hub axis through the center. The hub also has a splined exterior with a plurality of splines, each sp...
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WO/2020/219390A1 |
A nonwoven sheet can comprise a plurality of cellulosic pulp fibers and a plurality of synthetic polymeric fibers. The cellulosic pulp fibers can include a plurality of cedar pulp fibers that have a length weighted average fiber length o...
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WO/2020/219637A1 |
A screen cylinder includes a profiled bars aligned longitudinally and coupled to at least one support ring. Each of the profiled bars includes an outer surface facing away from the support ring, a first slot surface extending from the ou...
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WO/2020/193003A1 |
The invention relates to a pressure screen for cleaning a fibrous stock suspension (1), comprising a screen element (3) which is of rotationally symmetrical configuration about a screen axis (2) and divides the pressure screen into an in...
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WO/2020/187498A1 |
The invention relates to a method for producing a cylindrical screen device (10) with a plurality of profiled bars (12). The profiled bars (12) are inserted parallel to one another and to the cylinder axis into open-border recesses (16) ...
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WO/2020/188112A1 |
There is provided a method of producing a highly refined pulp, comprising the steps of: providing a pulp; subjecting the pulp to a first conical refining step in at least one conical refiner comprising refining plates having a bar width ...
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WO/2020/185140A1 |
The invention relates to a double disc pulp refiner (10) comprising a first refining disc (11) and a second refining disc (12), the first refining disc being arranged at a feed end of the refiner (10) where lignocellulosic material (M) i...
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WO/2020/181886A1 |
A method for producing highly water-resistant box board paper, comprising the following steps in sequence: crushing, sand removal, first-stage coarse screening, sizing screening, slurry preparation, surface layer preparation, liner layer...
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WO/2020/180225A1 |
A system(1) for refining lignocellulosic biomass material(A) comprising a presteaming bin(2), a dewatering device (3), apreheater (4), a defibrator (9) comprising at least one refining zone (14) wherein steam is generated during refining...
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WO/2020/169236A1 |
The invention relates to a plate segment (2) for refining aqueously suspended fibrous material (1) in a refining gap (3) delimited by two treatment surfaces, which rotate relative to one another and are formed by plate segments (2). The ...
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WO/2020/169884A1 |
A processing plate (4, 12) for a device (1) for mechanically processing lignocellulose containing fibrous material. The plate comprises inner and outer peripheries (22, 23) and a processing surface (9, 17) provided with projecting parts ...
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WO/2020/163459A1 |
This disclosure relates to refiner plate segments having feeding grooves having a first width at a first end of the feeding groove, wherein the first end of the feeding groove is disposed closer to an inner diameter of the refiner plate ...
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WO/2020/151951A1 |
The invention relates to a method for controlling a device for processing high-consistency fibrous material (1), comprising a housing (2), in which a first treatment tool (3) and a second treatment tool (4) are arranged, wherein in each ...
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WO/2020/146581A1 |
A reject chamber for use with a hydrocyclone for separating a fiber suspension into a heavy fraction substantially containing heavy contaminants and a light fiber fraction substantially containing fibers, the reject chamber having an int...
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WO/2020/133856A1 |
The present invention belongs to the field of paper technologies and new materials, and specifically relates to a method for preparing a biomechanical primary color pulp from wheat straw. The present invention involves first pre-treating...
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WO/2020/126147A1 |
The invention relates to a refining arrangement for refining aqueously suspended pulp between two refining surfaces, which form a refining gap (1) and rotate relative to each other and are formed by refining strips (2) and grooves (3) ex...
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WO/2020/120280A1 |
A technique is proposed by which a paper raw material can be more efficiently sorted while a screen basket is reduced in size. A screen basket 10 according to the invention comprises perforated plates 20 for separating foreign bodies fro...
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WO/2020/114657A1 |
A method for operating a facility for producing fibrous material web, in particular a paper or cardboard web, wherein the facility comprises a material preparation system for providing a fibrous suspension and a headbox for applying the ...
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WO/2020/109667A1 |
The present invention relates to an arrangement and a method for controlling a gas flow separated from a suspension of medium consistency pulp. The pulp is treated in a pulp treatment apparatus comprising at least a first pump and a seco...
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WO/2020/100980A1 |
Provided is a method for producing anion-modified cellulose nanofibers at low power consumption. The anion-modified cellulose nanofibers are produced through the defibrillation of an anion-modified cellulose using a cavitation jet device...
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WO/2020/094322A1 |
The invention relates to a rotor for a heating unit comprising a rotor housing and a rotatable rotor shaft, which is provided in the rotor housing and has add-on components for influencing a stock suspension to be heated, which flows thr...
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WO/2020/096504A1 |
The present invention concerns a fiber concentration profile measuring apparatus (1) comprising a plurality of conductor bodies (9, 509), configured to be coupled to a primary AC power source (17) comprising an impedance measuring unit (...
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WO/2020/076700A1 |
The problem of increased energy usage in refiners over the working life of a refining assembly is mitigated by the use of a refiner plate segment having a refiner side and a back side distally disposed from the refiner side, refiner bars...
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WO/2020/063906A1 |
Disclosed is an intelligent pressure screen, comprising: a pressure screen body (6), a pressure screen rotor driving motor (14), a slurry inlet pipeline (4), a slurry inlet pump (1), a slurry inlet pump driving motor (3), a good slurry o...
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WO/2020/062604A1 |
A grinding disc clearance servo control device and method for a disc-type grinding system, which relates to the technical field of grinding disc clearance control of disc-type grinding systems. The device comprises a disc-type grinder (2...
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WO/2020/057851A1 |
The invention relates to a control method for a device for cleaning a fiber material suspension (1), having at least one chamber (2) for the fiber material suspension (1) and a heavy-fraction separator (3) connected thereto. The discharg...
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WO/2020/048758A1 |
The present invention relates to a method for preparing grass fibres having the steps: a) providing grass fibres having a predefined fibre length distribution or average fibre length; b) suspending the grass fibres in water at a predefin...
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WO/2020/037549A1 |
Aramid fiber far-infrared emitting paper and a preparation method therefor. Para-aramid chopped fibers and para-aramid pulp fibers are used as paper-based functional materials, which have the excellent characteristics of high specific st...
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WO/2020/038823A1 |
The invention relates to a method for forming and treating a fibrous material suspension (1), suitable for producing paper webs or paper web layers, made from pulp and water, wherein the fibrous material suspension (1) is guided from a p...
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WO/2020/038979A1 |
The invention relates to an apparatus (1) for fractionating a suspension containing elongated particles, comprising a plurality of substantially tubular fractionating devices (1) and at least one distributor (12) that can be connected to...
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WO/2020/033659A1 |
A fiber blend includes a first amount of wood pulp fibers refined in an amount of at least about 150 kWh per metric ton of gross refining energy, and a second amount of wood pulp fibers refined in an amount of at most about 10 kWh per me...
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WO/2020/022941A1 |
There is disclosed a refiner segment (10) adapted to be attached to a refiner disc (30) in a refiner (100) of lignocellulosic material, said refiner segment (10) being provided with a plurality of spaced apart bars (20,) extending in a d...
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WO/2020/015883A1 |
The invention relates to a device (1), in particular a refiner, and to a method for handling fibres (3) of a mixture of substances (2) containing fibres (3), wherein the device comprises at least one outlet element (11) for the passage o...
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WO/2020/007499A1 |
The invention relates to a screening device, which is preferably in the form of a screening basket. Such screening devices are used, for example, in classifying processes in the paper industry. Screening slots or screening gaps are forme...
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WO/2020/005131A1 |
The present invention relates to a knot re-cooking arrangement for batch cooking of pulp, comprising: a batch digester (4) for cooking wood chips in a Kraft process to produce pulp, a knot removal device for removing knots (10) from pulp...
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WO/2020/005289A1 |
A system for treating cellulosic fibers to improve paper, board and tissue quality; the system involves splitting fibers into an original portion having original fibers and a refinable portion. The refinable portion may further be fracti...
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WO/2019/235987A1 |
The present disclosure provides a refiner segment (1) for refining of lignocellulosic material. The refiner segment (1) have a surface comprising a plurality of bars (10j) extending along a direction between an inner periphery (17a) of t...
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WO/2019/219299A1 |
The invention relates to a method for producing a surface-treated fibrous web (33), in particular a web of cardboard or packaging paper, at least comprising a material preparation stage (4), at least one headbox (24), a forming section (...
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WO/2019/199215A1 |
Disclosed is a refiner segment (1) that is adapted to be attached to a refining disc (30) of a refiner (100) of lignocellulosic material. The refiner segment (1) comprises a number N, N ≥ 2, of bars (10) and a number, M ≥2, of dams (...
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WO/2019/197049A1 |
The invention relates to a filter sector (1) of a filter disc (3), which rotates about a hollow shaft (2), for a disc filter for separating liquids from a suspension, in particular from a fibrous material suspension (4), consisting of a ...
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WO/2019/200348A1 |
A process for improving high aspect ratio cellulose filament blends comprising the steps of: a) providing a blend of cellulose nano-filaments or blend of cellulose micro-filaments; b) diluting the blend of cellulose nano-filaments or the...
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WO/2019/189615A1 |
Provided is a method for manufacturing paper or paperboard, the method including a step for adding chemically modified pulp to raw pulp and preparing a mixed pulp, a step for refining the mixed pulp, a step for preparing a paper material...
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WO/2019/176465A1 |
This method for producing a high-transparency cellulose nanofiber dispersion has a preliminary defibration step for beating chemically modified cellulose using a single disk-type refiner, and a main defibration step for defibrating pulp ...
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WO/2019/166912A1 |
The invention discloses a method to form a composition, which method includes fibrillating fibers to form MFC in the presence of an alkali-metal silicate whereby an MFC and silicate mixture is formed The presence of alkali-metal silicate...
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WO/2019/164433A1 |
There is disclosed a refiner segment (10) for a refiner (1) of lignocellulosic material. The refiner segment (10) is part of a refiner disc (100) that comprises a center area (11). The refiner segment (10) comprises a number H, N ≥2, o...
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WO/2019/164937A1 |
A flinger or refiner plate for a mechanical refiner including deep notches or holes in feeder bars of the flinger plate and/or open passages or holes in bars of the refiner plate. The open passages and/or holes in the bars significantly ...
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WO/2019/158616A1 |
The invention relates to novel methods for processing lignocellulosic material. More specifically, the invention proves an integrated approach for processing cellulose to obtain paper and pulp and valorizing lignin to obtain value-added ...
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