摘要:
Die Erfindung betrifft ein Verfahren zur Steuerung oder Regelung einer Vorrichtung zur Behandlung von Faserstoff (1) zumindest teilweise auf Grundlage ihrer Antriebsleistung, wobei die Vorrichtung ein Gehäuse (2) besitzt, in welchem wenigstens ein erstes Behandlungswerkzeug (3) und ein zweites Behandlungswerkzeug (4) angeordnet ist, die Behandlungswerkzeuge (3, 4) jeweils auf einer Grundplatte (7, 8) befestigt sind, eine rotationssymmetrische Form haben, koaxial zueinander angeordnet sind, sich relativ zueinander um eine gemeinsame Achse (5) drehen und einen vom Faserstoff (1) radial durchströmten Behandlungsspalt (6) begrenzen, dessen Spaltbreite über eine axiale Verschiebung wenigstens einer Grundplatte (7, 8) eines Behandlungswerkzeuges (3, 4) veränderbar ist. Dabei soll die Behandlung des Faserstoffs dadurch verbessert werden, dass die auf die verschiebbare Grundplatte einwirkende Axialkraft (F) gemessen und die Spaltbreite zumindest in Abhängigkeit von Antriebsleistung und Axialkraft (F) gesteuert oder geregelt wird.
摘要:
Cellulose precursor materials may be refined (e.g., fibrillated) in an ethanol medium, or other solvent medium, instead of water. Following refining, the solvent may be removed and recycled prior to incorporation into another material, or optionally, following such incorporation. The solvent may assist the incorporation of nanocellulose into another material (e.g., a polymer) for a composite, for example. In some variations, a process comprises fractionating a biomass feedstock in the presence of an acid, a solvent for lignin, and water, to generate cellulose-rich solids and a liquid containing hemicellulose and lignin; mechanically treating the celluloserich solids, in the presence of a refining solvent, to form cellulose fibrils and/or cellulose crystals, thereby generating a nanocellulose material; recovering and recycling the refining solvent; and recovering the nanocellulose material or incorporating the nanocellulose material into a composite material.
摘要:
The present invention relates to microfibrillated cellulose ("MFC"), in particular to microfibrillated cellulose, which is morphologically different from conventional MFC known in the art and/or which provides improved water retention properties and/or improved rheological properties, in particular increased zero shear viscosity, η 0 , (also known as: "viscosity at rest", i.e. viscosity in the absence of shear forces), in solution, in particular in polyethylene glycol (PEG) as solvent, vis-a-vis conventional MFC as known in the art.
摘要:
A fine sheared polymeric nanofiber of a short cut length and a method for shearing the polymeric nanofiber are provided. In some embodiments, the polymeric nanofiber includes: a length range from 10-2000 μm; a length to diameter (L:D) aspect ratio ranging from 20 to 10,000; an average diameter range from 1 nm to 2 μm; and/or two or more different polymers and/or one or more additives. The shortened length of the polymeric nanofiber allows for easy dispersion in certain liquids compared to the same fine fiber in long lengths. The method of shearing polymeric nanofibers comprises milling the polymeric fiber in a liquid solution, performed with wet grinding processes and equipment.
摘要:
본 발명은 펄프(지류(紙類)를 포함)를 미세 분말로 만들기 위한 장치 및 제조 방법에 관한 것으로, 미세분말 연속제조방법은, 피절단물을 공급받아 일정한 크기 이하로 절단하는 전처리 절단단계; 및 상기 전처리 절단단계를 거친 절단물을 상승하는 기류 내에서 고속회전시켜 충격력과 전단력, 마찰력을 이용하여 분쇄하는 고속기류분쇄단계를 포함한다. 이 때, 상기 전처리 절단단계는 전처리 절단장치에 의해 이루어지고, 상기 고속기류분쇄단계는 고속기류분쇄장치에 의해 이루어진다. 본 발명에 의해 펄프를 분쇄하는 과정에서 동력 사용을 줄이고, 화학적 방법을 배제하여 생산성이 향상되는 효과로 분해성 프라스틱의 산업적 대량 생산이 가능하다.
摘要:
The invention relates to a method for manufacturing furnish for a paper product, wherein the manufactured furnish contains fibril cellulose material. The method comprises introducing first raw material to a system, which first raw material includes cellulose pulp (2), introducing second raw material to the system, which second raw material comprises cellulose fibers that are oxidized by nitroxyl-mediated oxidation of hydroxyl groups of the cellulose, conveying the first raw material and the second raw material to a refiner (8), and refining and mixing the first raw material and the second raw material in the refiner (8) in order to produce furnish comprising fibril cellulose material (4). In addition, this invention relates to a system for manufacturing furnish and to a paper product.
摘要:
The invention relates to a method for producing mechanical pulp from a cellulose-based raw material by washing it in a chip washer (2). Water is removed from the washed raw material in a pulp thickener (4), and the pulp is refined in at least one refiner (6) comprising at least a first blade and a counter piece, wherein the distance between the first blade and the counter piece determines the blade gap. In the method, the raw material is also pre-defibrated by at least one pre- defibrator (3) before the refining of the pulp in the refiner (6). The invention also relates to a system for producing mechanical pulp from cellulose-based raw material. The system comprises a washer (2), a pulp thickener (4), and at least one refiner (6) comprising a refining space and at least a first blade and a counter piece, wherein the distance between the first blade and the counter piece determines the blade gap. The system comprises a pre-defibrator (3) placed before the refiner (6). The invention also relates to the use of the method and the system in the manufacture of a paper product.
摘要:
The invention relates to pulp treatment by pulp fractionation such that the pulp is fractionated into a short fiber fraction and a long fiber fraction, wherein the short fiber fraction bypasses the refiner and the long fiber fraction is mechanically treated in the refiner, whereafter the untreated short fiber fraction and the mechanically treated long fiber fraction are mixed together or are used separately for paper production. By this fiber fractionation before refining fiber lengths distribution is optimized in order to maximize the strengths properties and to minimize the fines content. According to this mode the long fiber fraction will have a mechanical treatment which is more effective.
摘要:
A process for making fibrillated fibers includes preparing a fluid suspension of fibers, low shear refining the fibers at a first shear rate to create fibrillated fibers having a reduced CSF, and subsequently higher shear refining the fibers at a second shear rate, higher than the first shear rate, to increase the degree of fibrillation of the fibers. The refining at the first shear rate may be with a rotor at a first maximum shear rate and the refining at the second shear rate may be with a rotor at a second maximum shear rate, higher than the first maximum shear rate. The process may further include pre-treating the fibers by high shear refining with impact to stress the fibers prior to low shear refining.
摘要:
Ein Verfahren zur Aufbereitung von Faserstoff zur Herstellung von Papier oder Karton umfasst die folgenden Schritte: a) Bereitstellen von Fasern in Form einer Suspension mit einer vorgebbaren Feststoffkonzentration, b) Beladen der Fasern mit einem Fällungsprodukt, ohne den Stoff dabei zu mahlen, c) Mahlen der Fasern nach Abschluss des Beladungsprozesses zur Erhöhung des Mahlgrades und/oder zur Veränderung der Fasereigenschaften, und d) Weiterführen der entsprecehnd den Schritten a) bis c) behandelten Faserstoffsuspension in Richtung Papiermaschine.