[go: up one dir, main page]

WO2004022843A1 - Method for the treatment of fiber material - Google Patents

Method for the treatment of fiber material Download PDF

Info

Publication number
WO2004022843A1
WO2004022843A1 PCT/EP2003/008445 EP0308445W WO2004022843A1 WO 2004022843 A1 WO2004022843 A1 WO 2004022843A1 EP 0308445 W EP0308445 W EP 0308445W WO 2004022843 A1 WO2004022843 A1 WO 2004022843A1
Authority
WO
WIPO (PCT)
Prior art keywords
grinding
fibers
movement
zone
fibrous material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2003/008445
Other languages
German (de)
French (fr)
Inventor
Wolfgang Berger
Klaus Eibinger
Rudolf Eichinger
Dietmar GRÜNEIS
Andrea Hierner
Walter RÜF
Ronald Sigl
Helmut Stark
Peter-Rigobert Winter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEUSIEDLER AG
NORSKE SKOG BRUCK GmbH
Winter Erika
Mondi Frantschach GmbH
SCA Graphic Laakirchen AG
Institut fuer Papier Zellstoff und Fasertechnik
SAPPI PAPIER HOLDING AG
Voith Paper Fiber and Environmental Solutions GmbH and Co KG
Original Assignee
NEUSIEDLER AG
NORSKE SKOG BRUCK GmbH
Winter Erika
Frantschach Pulp and Paper Austria AG
SCA Graphic Laakirchen AG
Institut fuer Papier Zellstoff und Fasertechnik
Voith Paper Fiber Systems GmbH and Co KG
SAPPI PAPIER HOLDING AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEUSIEDLER AG, NORSKE SKOG BRUCK GmbH, Winter Erika, Frantschach Pulp and Paper Austria AG, SCA Graphic Laakirchen AG, Institut fuer Papier Zellstoff und Fasertechnik, Voith Paper Fiber Systems GmbH and Co KG, SAPPI PAPIER HOLDING AG filed Critical NEUSIEDLER AG
Priority to AU2003258551A priority Critical patent/AU2003258551A1/en
Priority to EP03793666A priority patent/EP1521883A1/en
Priority to BR0305765-8A priority patent/BR0305765A/en
Priority to JP2004533296A priority patent/JP2005535799A/en
Priority to US10/523,063 priority patent/US20070006984A1/en
Publication of WO2004022843A1 publication Critical patent/WO2004022843A1/en
Priority to NO20041310A priority patent/NO20041310L/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/34—Other mills or refiners
    • D21D1/36—Other mills or refiners with vertical shaft
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/34—Other mills or refiners
    • D21D1/38—Other mills or refiners with horizontal shaft

Definitions

  • the invention relates to a method for fiber treatment according to the preamble of claim 1.
  • Process for fiber treatment of the above Kinds are generally also referred to as grinding processes. It has long been known that pulp fibers have to be ground so that the paper subsequently produced from them has the desired properties, in particular strength, formation and surface. By far the most frequently used grinding processes use grinding surfaces which are provided with strips known as knives. The corresponding machines are mostly called knife refiners. For special cases, grinding processes are also used in which at least one of the grinding surfaces is knife-free, so that the grinding work is transmitted by friction or shear forces.
  • the effect of the method can be controlled over a wide range by changing the grinding parameters, and in addition to the amount of grinding, a distinction is made in particular as to whether a more cutting or more fibrillating grinding is desired. If pulp fibers are processed by the known grinding processes, their resistance to dewatering increases with increasing grinding. A common measure of drainage resistance is the Schopper-Riegler degree of grinding.
  • the invention is based on the object of providing a method for treating pulp with which it is possible to change pulp or paper fibers in such a way that the strengths of the paper produced therefrom are increased.
  • the increase in dewatering resistance that occurs should be at least less than in known grinding processes.
  • the new grinding process essentially works in such a way that grinding shear stress on the cellulose fibers is largely avoided. This essentially achieves three important advantages over the known grinding processes:
  • the fiber surface is not or significantly less fibrillated.
  • the specific grinding work to achieve the desired strength is generally less.
  • FIG. 2 Schematic: A device for performing the method
  • FIG. 4 schematically in the position of use: Another device for
  • FIG. 1 can be seen as a top view of part of a device that is particularly suitable for carrying out the method be considered. However, no technical-constructive details are shown.
  • the grinding surface 1 is located on the outer circumference of a rotating grinding body 9.
  • the grinding surface 2, as the inside of a likewise rotating grinding drum 8, carries on its inside the fibrous material F to be ground, that is to say the aqueous suspension containing the paper or cellulose fibers. Due to the centrifugal forces, it is evenly distributed on the grinding surface 2 and rotates on it.
  • the peripheral speed of the grinding element 9 is indicated by an arrow 6 and that of the grinding drum 8 by an arrow 7.
  • the kinematics of these two grinding surfaces is such that at point 5, where the two grinding surfaces come closest, there is at most a very low relative speed between the fibrous material F and the grinding surfaces in the direction of the main movements of the grinding surfaces.
  • the main directions of movement arise from the movement of the grinding surfaces due to the drive.
  • the grinding body 9 rolls here on the inside of the grinding drum 8.
  • the axis of rotation of the grinding element 9 is parallel to that of the grinding drum 8 and can be fixed in space.
  • the actual grinding zone 3 begins at the point at which the grinding surface 1 dips into the layer of the fibrous material F.
  • the grinding body 9 is pressed against the grinding surface 2 with the force P here. The grinding effect can be adjusted by changing this force.
  • the grinding surface 1 is here provided with grooves 4, the effect of which cannot be compared with that of knives known from knife refiners, in which the knives are moved relative to one another at high speed.
  • the grooves 4 in cooperation with the counter surface, generate pressure pulses which serve, for example, to absorb water from the fibers. They also ensure the transport of the fibrous material F through the grinding zone 3.
  • the grooves can run over the entire axial length of the grinding body, but they can also be interrupted. Depth t and width u should generally be at least 2 mm. Deviations from the rectangular profile shown here are also conceivable, as shown by way of example in FIG. 3 using a trapezoidal profile.
  • a device for performing the method could basically be constructed as shown in FIG. 2 in the position of use.
  • a horizontally arranged grinding drum 8 can be seen, which is set in rotation via the drive 11.
  • Within this grinding drum there are several grinding bodies 9 which - as already described - are moved in such a way that a rolling movement is formed at the contact points with the grinding drum 8.
  • the grinding media 9 are set in rotation by the drive 10, their axes of rotation being vertical and fixed in space.
  • the added fibrous material F can be ground in batches with such a device and removed after the grinding process as ground fibrous material F '. If such a device is to be operated continuously, precautions must be taken which bring about a constant throughput of the fibrous material, so that uniform grinding takes place.
  • FIG. 4 Another possibility for carrying out the method is shown in FIG. 4, in which the center lines of the grinding drum 8 and the grinding element 9 lie horizontally.
  • This device allows continuous grinding what However, this presupposes that the desired grinding is achieved with just a few passes through a grinding zone.
  • a wide layer of the fibrous material F to be ground is introduced into the stationary grinding drum 8 in such a way that it runs down on the inner wall of the grinding drum due to gravity.
  • the grinding element 9 rolls on the inner wall of the grinding drum 8 such that the rotational movement (directional arrow 6) of the grinding element 9 about its axis is superimposed with a rotational movement (directional arrow 6 ') of the axis of the grinding element 9 about the center line of the grinding drum 8.
  • such a device contains a plurality of grinding media 9 which are mounted on a rotating frame.
  • the grinding media can run against the flow of the pulp (as drawn here) or follow it.
  • FIG. 5 The improvement that can be achieved by the new method is indicated on a schematic diagram according to FIG. 5.
  • This diagram shows the degree of grinding (arrow 12), plotted over the tearing length (arrow 13).
  • Curve 14 shows the result of a conventional knife grinding and curve 15 shows a result achieved by the new method. It can easily be seen that in order to achieve a desired high tearing length, the new process produces a significantly lower degree of grinding. This diagram is only intended to show a general trend.

Landscapes

  • Paper (AREA)

Abstract

Disclosed is a method for modifying suspended paper fibers or pulp fibers, especially in order to increase the rigidity of the paper that is made from said fibers. According to the inventive method, two grinding areas (1, 2) are pressed against each other and moved such that the relative speed between the grinding areas (1, 2) and the fiber material (F) in the grinding zone (3) is as low as possible. Said method can be carried out in a particularly favorable manner by means of grinding elements (9) which support one (1) of the grinding areas and are rolled off on the inside of a grinding drum (8) that supports the grinding area (2).

Description

Verfahren zur Faserstoffbehandlung Process for fiber treatment

Die Erfindung bezieht sich auf ein Verfahren zur Faserstoffbehandlung gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a method for fiber treatment according to the preamble of claim 1.

Verfahren zur Faserstoffbehandlung der o.g. Art werden im Allgemeinen auch als Mahlverfahren bezeichnet. Seit langem ist bekannt, dass Zellstofffasern gemahlen werden müssen, damit das später daraus hergestellte Papier die gewünschten Eigenschaften, insbesondere Festigkeiten, Formation und Oberfläche, aufweist. Die weitaus am häufigsten verwendeten Mahlverfahren benutzen solche Mahlflächen, die mit als Messer bezeichneten Leisten versehen sind. Die entsprechenden Maschinen werden zumeist Messerrefiner genannt. Für Spezialfälle werden auch Mahlverfahren verwendet, bei denen mindestens eine der Mahlflächen messerlos ist, so dass die Mahlarbeit durch Reib- oder Scherkräfte übertragen wird.Process for fiber treatment of the above Kinds are generally also referred to as grinding processes. It has long been known that pulp fibers have to be ground so that the paper subsequently produced from them has the desired properties, in particular strength, formation and surface. By far the most frequently used grinding processes use grinding surfaces which are provided with strips known as knives. The corresponding machines are mostly called knife refiners. For special cases, grinding processes are also used in which at least one of the grinding surfaces is knife-free, so that the grinding work is transmitted by friction or shear forces.

Die Wirkung des Verfahrens lässt sich durch Ändern der Mahlparameter in einem weiten Bereich steuern, wobei neben der Höhe der Ausmahlung insbesondere auch unterschieden wird, ob eine stärker schneidende oder stärker fibrillierende Mahlung gewünscht wird. Werden Zellstofffasern durch die bekannten Mahlverfahren bearbeitet, so steigt ihr Entwässerungswiderstand mit zunehmender Ausmahlung. Ein übliches Maß für den Entwässerungswiderstand ist der Mahlgrad nach Schopper-Riegler.The effect of the method can be controlled over a wide range by changing the grinding parameters, and in addition to the amount of grinding, a distinction is made in particular as to whether a more cutting or more fibrillating grinding is desired. If pulp fibers are processed by the known grinding processes, their resistance to dewatering increases with increasing grinding. A common measure of drainage resistance is the Schopper-Riegler degree of grinding.

Die Erhöhung des Mahlgrades wirkt sich bei der Blattbildung auf der Papiermaschine ungünstig aus, wird aber hingenommen, da die bereits genannten Qualitätsmerkmale des Zellstoffes eine überragende Rolle für dessen Einsetzbarkeit spielen. In vielen Fällen werden die Mahlparameter so gewählt, dass der zur Erreichung der geforderten Faserqualität eingetretene Mahlgradanstieg möglichst gering ist. Diese Einflussmöglichkeit ist aber sehr begrenzt. Außerdem kann dadurch die Mahlung kraftwirtschaftlich ungünstiger werden.Increasing the degree of grinding has an unfavorable effect on sheet formation on the paper machine, but is accepted because the quality characteristics of the pulp mentioned above play an outstanding role in its usability. In many cases, the grinding parameters chosen in such a way that the increase in freeness to achieve the required fiber quality is as small as possible. However, this influence is very limited. In addition, this can make the grinding less economical.

Der Erfindung liegt die Aufgabe zu Grunde, ein Verfahren zur Faserstoffbehandlung zu schaffen, mit dem es möglich ist, Zellstoff- oder Papierfasern so zu verändern, dass die Festigkeiten des daraus hergestellten Papiers erhöht werden. Die dabei auftretende Zunahme des Entwässerungswiderstandes soll zumindest geringer sein als bei bekannten Mahlverfahren.The invention is based on the object of providing a method for treating pulp with which it is possible to change pulp or paper fibers in such a way that the strengths of the paper produced therefrom are increased. The increase in dewatering resistance that occurs should be at least less than in known grinding processes.

Diese Aufgabe wird durch die im Anspruch 1 genannten Merkmale gelöst.This object is achieved by the features mentioned in claim 1.

Das neue Mahlverfahren arbeitet im Wesentlichen so, dass eine mahlende Scherbeanspruchung der Zellstofffasern weitestgehend vermieden wird. Dadurch werden im Wesentlichen gegenüber den bekannten Mahlverfahren drei wichtige Vorteile erzielt:The new grinding process essentially works in such a way that grinding shear stress on the cellulose fibers is largely avoided. This essentially achieves three important advantages over the known grinding processes:

1. Die Faserlänge bleibt wesentlich besser erhalten.1. The fiber length remains much better.

2. Die Faseroberfläche wird nicht oder bedeutend weniger fibrilliert.2. The fiber surface is not or significantly less fibrillated.

3. Die spezifische Mahlarbeit zur Erreichung der gewünschten Festigkeiten ist im Allgemeinen geringer.3. The specific grinding work to achieve the desired strength is generally less.

Vergleichsversuche mit Langfaserzellstoff haben gezeigt, dass zur Erzielung einer Reißlänge von 8 km bei einer Messermahlung 45° SR Mahlgrad entstand und mit dem neuen Verfahren nur 18° SR. Die benötigte spezifische Mahlarbeit lag bis zu 50% niedriger. Es ist anzunehmen, dass durch das neue Mahlverfahren die Oberfläche der Fasern so verändert wird, dass sie eine verbesserte Flexibilität und Bindungsfähigkeit erhält, ohne dass Fibrillen aus der äußeren Oberfläche der Fasern herausgelöst werden müssen. Auch die Erzeugung von Feinstoff, also Faserbruchstücken, kann unterbleiben.Comparative tests with long fiber pulp have shown that to achieve a tear length of 8 km with a knife grinding a 45 ° SR freeness was achieved and with the new method only 18 ° SR. The specific grinding work required was up to 50% lower. It can be assumed that the new grinding process changes the surface of the fibers in such a way that they receive improved flexibility and binding ability without the need to remove fibrils from the outer surface of the fibers. The production of fine material, i.e. fiber fragments, can also be avoided.

Wird das Verfahren auf rezyklierte Fasern angewendet, können die unter 1. und 2. genannten Vorteile eine besondere Rolle spielen. Rezyklierte Fasern haben bereits mindestens einen, oft sogar mehrere Mahlvorgänge hinter sich, so dass jede weitere Zerkleinerung gerne vermieden wird.If the process is applied to recycled fibers, the advantages mentioned under 1. and 2. can play a special role. Recycled fibers have already undergone at least one, often even several grinding processes, so that any further size reduction can be avoided.

Die Erfindung und ihre Vorteile werden erläutert an Hand von Zeichnungen. Dabei zeigen:The invention and its advantages are explained with reference to drawings. Show:

Fig. 1 ein einfaches Beispiel zur Durchführung des erfindungsgemäßen Verfahrens;1 shows a simple example for carrying out the method according to the invention;

Fig. 2 Schematisch: Eine Vorrichtung zur Durchführung des Verfahrens;Fig. 2 Schematic: A device for performing the method;

Fig. 3 Variation des Rollenprofils;Fig. 3 variation of the roller profile;

Fig. 4 schematisch in Gebrauchslage: Eine weitere Vorrichtung zurFig. 4 schematically in the position of use: Another device for

Durchführung des Verfahrens;Implementation of the procedure;

Fig. 5 Qualitatives Festigkeitsdiagramm.Fig. 5 Qualitative strength diagram.

Die Darstellung in der Fig. 1 kann als Ansicht von oben auf einen Teil einer zur Durchführung des Verfahrens besonders geeigneten Vorrichtung angesehen werden. Dabei sind allerdings keine technisch-konstruktiven Details gezeigt. Die Mahlfläche 1 befindet sich gemäß dieser Darstellung auf dem Außenumfang eines rotierenden Mahlkörpers 9. Die Mahlfläche 2, als Innenseite einer ebenfalls rotierenden Mahltrommel 8, trägt auf ihrer Innenseite den zu mahlenden Faserstoff F, also die die Papier- oder Zellstofffasern enthaltende wässrige Suspension. Auf Grund der Zentrifugalkräfte wird er gleichmäßig auf der Mahlfläche 2 verteilt und rotiert auf dieser mit. Die Umfangsgeschwindigkeit des Mahlkörpers 9 ist durch einen Richtungspfeil 6 und die der Mahltrommel 8 durch einen Richtungspfeil 7 angedeutet. Die Kinematik dieser beiden Mahlflächen ist erfindungsgemäß so, dass an der Stelle 5, an der sich die beiden Mahlflächen am meisten nähern, höchstens eine sehr geringe Relativgeschwindigkeit zwischen dem Faserstoff F und den Mahlflächen in Richtung der Hauptbewegungen der Mahlflächen entsteht. Die Haupt- Bewegungsrichtungen entstehen durch Bewegung der Mahlflächen auf Grund des Antriebs. Der Mahlkörper 9 wälzt sich dabei hier auf der Innenseite der Mahltrommel 8 ab. Die Drehachse des Mahlkörpers 9 ist parallel zu der der Mahltrommel 8 und kann raumfest sein. An der Stelle, an der die Mahlfläche 1 in die Schicht des Faserstoffs F eintaucht, beginnt die eigentliche Mahlzone 3. Um eine Kompressionskraft zu erzeugen, wird hier der Mahlkörper 9 mit der Kraft P gegen die Mahlfläche 2 angepresst. Durch Verändern dieser Kraft lässt sich die Mahlwirkung einstellen. Als vorteilhaft haben sich Linienkräfte zwischen 2 und 10 N/mm erwiesen. Bei dieser Angabe wird die Kraft auf die Breite der kontaktierenden Mahlkörper bezogen, ohne die Ausdehnung der Berührungsfläche in Laufrichtung zu berücksichtigen. In der Mahlzone 3 entsteht dadurch eine Faserbehandlung mit Kompressions- und Quetschvorgängen, die die Fasern sehr schonend flexibilisieren. Nennenswerte Scher- oder gar Schnittkräfte werden auf die Fasern nicht übertragen. Die Mahlfläche 1 ist hier mit Rillen 4 versehen, deren Wirkung nicht mit der von Messern bekannter Messerrefiner zu vergleichen ist, bei denen die Messer mit hoher Geschwindigkeit relativ zueinander bewegt werden. Hier erzeugen die Rillen 4 im Zusammenwirken mit der Gegenfläche Druckimpulse, die z.B. der Wasseraufnahme der Fasern dienen. Sie sorgen auch für den Transport des Faserstoffes F durch die Mahlzone 3. Die Rillen können über die ganze axiale Länge des Mahlkörpers verlaufen, sie können aber auch unterbrochen sein. Tiefe t und Breite u sollten im Allgemeinen mindestens 2 mm betragen. Es sind auch Abweichungen von dem hier gezeigten Rechteckprofil denkbar, wie Fig. 3 an Hand eines Trapezprofiles exemplarisch zeigt.The illustration in FIG. 1 can be seen as a top view of part of a device that is particularly suitable for carrying out the method be considered. However, no technical-constructive details are shown. According to this illustration, the grinding surface 1 is located on the outer circumference of a rotating grinding body 9. The grinding surface 2, as the inside of a likewise rotating grinding drum 8, carries on its inside the fibrous material F to be ground, that is to say the aqueous suspension containing the paper or cellulose fibers. Due to the centrifugal forces, it is evenly distributed on the grinding surface 2 and rotates on it. The peripheral speed of the grinding element 9 is indicated by an arrow 6 and that of the grinding drum 8 by an arrow 7. According to the invention, the kinematics of these two grinding surfaces is such that at point 5, where the two grinding surfaces come closest, there is at most a very low relative speed between the fibrous material F and the grinding surfaces in the direction of the main movements of the grinding surfaces. The main directions of movement arise from the movement of the grinding surfaces due to the drive. The grinding body 9 rolls here on the inside of the grinding drum 8. The axis of rotation of the grinding element 9 is parallel to that of the grinding drum 8 and can be fixed in space. The actual grinding zone 3 begins at the point at which the grinding surface 1 dips into the layer of the fibrous material F. In order to generate a compressive force, the grinding body 9 is pressed against the grinding surface 2 with the force P here. The grinding effect can be adjusted by changing this force. Line forces between 2 and 10 N / mm have proven to be advantageous. With this specification, the force is based on the width of the contacting grinding media, without taking into account the extension of the contact surface in the direction of rotation. In the grinding zone 3, this results in a fiber treatment with compression and squeezing processes that gently flex the fibers. Significant shear or even cutting forces are not transferred to the fibers. The grinding surface 1 is here provided with grooves 4, the effect of which cannot be compared with that of knives known from knife refiners, in which the knives are moved relative to one another at high speed. Here, the grooves 4, in cooperation with the counter surface, generate pressure pulses which serve, for example, to absorb water from the fibers. They also ensure the transport of the fibrous material F through the grinding zone 3. The grooves can run over the entire axial length of the grinding body, but they can also be interrupted. Depth t and width u should generally be at least 2 mm. Deviations from the rectangular profile shown here are also conceivable, as shown by way of example in FIG. 3 using a trapezoidal profile.

Eine Vorrichtung zur Durchführung des Verfahrens könnte grundsätzlich so aufgebaut sein, wie es die Fig. 2 in Gebrauchslage zeigt. Man erkennt eine horizontal angeordnete Mahltrommel 8, die über den Antrieb 11 in Rotation versetzt wird. Innerhalb dieser Mahltrommel befinden sich mehrere Mahlkörper 9, die - wie bereits beschrieben wurde - so bewegt werden, dass sich eine Abwälzbewegung an den Kontaktstellen zur Mahltrommel 8 ausbildet. Die Mahlkörper 9 werden durch den Antrieb 10 in Rotation versetzt, wobei ihre Rotationsachsen senkrecht und raumfest sind. Der zugegebene Faserstoff F kann mit einer solchen Vorrichtung absatzweise gemahlen und nach dem Mahlvorgang als ausgemahlener Faserstoff F' entnommen werden. Soll eine solche Vorrichtung kontinuierlich betrieben werden, müssen Vorkehrungen getroffen werden, die einen stetigen Durchsatz des Faserstoffes bewirken, so dass eine gleichmäßige Mahlung erfolgt.A device for performing the method could basically be constructed as shown in FIG. 2 in the position of use. A horizontally arranged grinding drum 8 can be seen, which is set in rotation via the drive 11. Within this grinding drum there are several grinding bodies 9 which - as already described - are moved in such a way that a rolling movement is formed at the contact points with the grinding drum 8. The grinding media 9 are set in rotation by the drive 10, their axes of rotation being vertical and fixed in space. The added fibrous material F can be ground in batches with such a device and removed after the grinding process as ground fibrous material F '. If such a device is to be operated continuously, precautions must be taken which bring about a constant throughput of the fibrous material, so that uniform grinding takes place.

Eine andere Möglichkeit zur Durchführung des Verfahrens zeigt die Fig. 4, bei der die Mittellinien der Mahltrommel 8 und der Mahlkörper 9 waagerecht liegen. Diese Vorrichtung gestattet die kontinuierliche Mahlung, was allerdings voraussetzt, dass mit wenigen Durchgängen durch eine Mahlzone bereits die gewünschte Ausmahlung erreicht wird. In die stillstehende Mahltrommel 8 wird eine breite Schicht des zu mahlenden Faserstoffs F so eingegeben, dass sie auf Grund der Schwerkraft an der Innenwand der Mahltrommel herabläuft. Der Mahlkörper 9 wälzt sich dadurch an der Innenwand der Mahltrommel 8 ab, dass sich die Rotationsbewegung (Richtungspfeil 6) des Mahlkörpers 9 um seine Achse mit einer Rotationsbewegung (Richtungspfeil 6') der Achse des Mahlkörpers 9 um die Mittellinie der Mahltrommel 8 überlagert. In der Regel enthält eine solche Vorrichtung mehrere Mahlkörper 9, die auf einem rotierenden Gestell gelagert sind. Durch Wahl der Zugabe- und Entnahmestellen des Faserstoffs F kann dessen Strömungsgeschwindigkeit reguliert werden. Die Mahlkörper können dem Strom des Faserstoffs entgegenlaufen (wie hier gezeichnet) oder ihm folgen.Another possibility for carrying out the method is shown in FIG. 4, in which the center lines of the grinding drum 8 and the grinding element 9 lie horizontally. This device allows continuous grinding what However, this presupposes that the desired grinding is achieved with just a few passes through a grinding zone. A wide layer of the fibrous material F to be ground is introduced into the stationary grinding drum 8 in such a way that it runs down on the inner wall of the grinding drum due to gravity. The grinding element 9 rolls on the inner wall of the grinding drum 8 such that the rotational movement (directional arrow 6) of the grinding element 9 about its axis is superimposed with a rotational movement (directional arrow 6 ') of the axis of the grinding element 9 about the center line of the grinding drum 8. As a rule, such a device contains a plurality of grinding media 9 which are mounted on a rotating frame. By choosing the addition and removal points of the fibrous material F, its flow rate can be regulated. The grinding media can run against the flow of the pulp (as drawn here) or follow it.

Die Verbesserung, die sich durch das neue Verfahren erzielen lässt, ist an einem schematischen Diagramm gemäß Fig. 5 angedeutet. Dieses Diagramm zeigt den Mahlgrad (Pfeil 12), aufgetragen über die Reißlänge (Pfeil 13). Die Kurve 14 gibt das Ergebnis einer konventionellen Messermahlung wieder und die Kurve 15 ein durch das neue Verfahren erzieltes Ergebnis. Man erkennt ohne weiteres, dass zur Erzielung einer gewünschten hohen Reißlänge nach dem neuen Verfahren ein deutlich geringerer Mahlgrad erzeugt wird. Dieses Diagramm soll nur grundsätzliche Tendenz zeigen. The improvement that can be achieved by the new method is indicated on a schematic diagram according to FIG. 5. This diagram shows the degree of grinding (arrow 12), plotted over the tearing length (arrow 13). Curve 14 shows the result of a conventional knife grinding and curve 15 shows a result achieved by the new method. It can easily be seen that in order to achieve a desired high tearing length, the new process produces a significantly lower degree of grinding. This diagram is only intended to show a general trend.

Claims

Patentansprüche claims Verfahren zur Veränderung von wässrig suspendierten Papierfasern oder Zellstofffasern, bei dem der Faserstoff (F) durch mindestens eine Mahlzone (3) geführt wird, die zwischen Mahlflächen (1, 2) liegt, bei dem die Mahlflächen (1, 2) relativ zueinander bewegt und gegeneinander gedrückt werden, wodurch mechanische Mahlarbeit so auf die Fasern übertragen wird, dass sich die Festigkeiten des daraus hergestellten Papiers ändern, dadurch gekennzeichnet, dass die Relativgeschwindigkeit zwischen dem Faserstoff (F) und den Mahlflächen, in Haupt-Bewegungsrichtung der Mahlflächen gesehen, an der Stelle (5), an der sich zwei Mahlflächen (1, 2) in der Mahlzone (3) am nächsten sind, höchstens 10% der Absolutgeschwindigkeit der am schnellsten angetriebenen Mahlfläche ist, so dass in der Mahlzone (3) keine oder höchstens sehr geringe Scherkräfte auf die Fasern übertragen werden.Method for changing aqueous suspended paper fibers or cellulose fibers, in which the fiber material (F) is passed through at least one grinding zone (3), which lies between grinding surfaces (1, 2), in which the grinding surfaces (1, 2) move relative to each other and pressed against each other, whereby mechanical grinding work is transferred to the fibers in such a way that the strengths of the paper produced therefrom change, characterized in that the relative speed between the fibrous material (F) and the grinding surfaces, viewed in the main direction of movement of the grinding surfaces, on the Point (5) at which two grinding surfaces (1, 2) are closest in the grinding zone (3) is at most 10% of the absolute speed of the fastest driven grinding surface, so that no or at most very little in the grinding zone (3) Shear forces are transferred to the fibers. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Relativgeschwindigkeit zwischen dem Faserstoff (F) und den Mahlflächen, in Haupt-Bewegungsrichtung der Mahlflächen gesehen, an der Stelle (5), an der sich zwei Mahlflächen (1, A method according to claim 1, characterized in that the relative speed between the fibrous material (F) and the grinding surfaces, seen in the main direction of movement of the grinding surfaces, at the point (5) where two grinding surfaces (1, 2) in der Mahlzone (3) am nächsten sind, kleiner als 5% der Absolutgeschwindigkeit der am schnellsten angetriebenen Mahlfläche ist. 2) are closest in the grinding zone (3), is less than 5% of the absolute speed of the fastest driven grinding surface. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Relativbewegung der Mahlflächen (1, 2) eine Abwälzbewegung ist.3. The method according to claim 1 or 2, characterized in that the relative movement of the grinding surfaces (1, 2) is a rolling movement. 4. Verfahren nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die mechanische Mahlarbeit durch Komprimieren des Faserstoffes übertragen wird.4. The method according to claim 1, 2 or 3, characterized in that the mechanical grinding work is transferred by compressing the fibrous material. 5. Verfahren nach Anspruch 1, 2, 3 oder 4, dadurch gekennzeichnet, dass eine Mahlfläche (1) mit Rillen (4, 4') versehen ist, die quer zur Hauptbewegungsrichtung der bewegten Mahlfläche verlaufen.5. The method according to claim 1, 2, 3 or 4, characterized in that a grinding surface (1) with grooves (4, 4 ') is provided which extend transversely to the main direction of movement of the moving grinding surface. 6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass die Rillen (4, 4") eine Tiefe (t) von mindestens 2 mm und eine Erstreckung (u) in Bewegungsrichtung der bewegten Mahlflächen von mindestens 2 mm aufweisen.6. The method according to claim 5, characterized in that the grooves (4, 4 ") have a depth (t) of at least 2 mm and an extension (u) in the direction of movement of the moving grinding surfaces of at least 2 mm. 7. Verfahren nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass die zweite Mahlfläche (2) nicht mit quer laufenden Rillen versehen ist.7. The method according to claim 5 or 6, characterized in that the second grinding surface (2) is not provided with transverse grooves. 8. Verfahren nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass sich eine Mahlfläche (1) außen auf einem zylindrischen Mahlkörper (9) befindet, der mit seiner Mittellinie relativ zu einer Mahl- trommel (8) bewegt wird, die auf ihrer Innenseite die andere Mahl- fläche (2) enthält.8. The method according to any one of the preceding claims, characterized in that there is a grinding surface (1) on the outside on a cylindrical grinding body (9) which with its center line relative to a grinding drum (8) is moved, which contains the other grinding surface (2) on the inside. 9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass in einer Mahltrommel (8) mehrere Mahlkörper (9) verwendet werden.9. The method according to claim 8, characterized in that a plurality of grinding media (9) are used in a grinding drum (8). 10. Verfahren nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass der Faserstoff (F) in der Mahlzone (3) relativ zu einer der Mahlflächen (1, 2) nicht bewegt wird.10. The method according to any one of the preceding claims, characterized in that the fibrous material (F) in the grinding zone (3) is not moved relative to one of the grinding surfaces (1, 2). 11. Verfahren nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass die Fasern in einer Suspension mit höchstens 10 % Feststoffgehalt vorliegen.11. The method according to any one of the preceding claims, characterized in that the fibers are in a suspension with a maximum solids content of 10%. 12. Verfahren nach Anspruch 11, dadurch gekennzeichnet, dass der Feststoffgehalt höchstens 6 % ist.12. The method according to claim 11, characterized in that the solids content is at most 6%. 13. Verfahren nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass die Absolutgeschwindigkeit mindestens einer Mahlfläche (1 , 2) auf einem Wert zwischen 8 und 30 m/sec gehalten wird. 13. The method according to any one of the preceding claims, characterized in that the absolute speed of at least one grinding surface (1, 2) is kept at a value between 8 and 30 m / sec. 4. Verfahren nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass die Mahlflächen (1, 2) so gegeneinander gedrückt werden, dass in der Mahlzone (3) eine Linienkraft zwischen 2 und 10 N/mm entsteht. 4. The method according to any one of the preceding claims, characterized in that the grinding surfaces (1, 2) are pressed against each other so that a linear force between 2 and 10 N / mm arises in the grinding zone (3).
PCT/EP2003/008445 2002-08-13 2003-07-30 Method for the treatment of fiber material Ceased WO2004022843A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU2003258551A AU2003258551A1 (en) 2002-08-13 2003-07-30 Method for the treatment of fiber material
EP03793666A EP1521883A1 (en) 2002-08-13 2003-07-30 Method for the treatment of fiber material
BR0305765-8A BR0305765A (en) 2002-08-13 2003-07-30 Process for altering paper fibers or cellulose fibers in an aqueous suspension
JP2004533296A JP2005535799A (en) 2002-08-13 2003-07-30 Pulp processing method
US10/523,063 US20070006984A1 (en) 2002-08-13 2003-07-30 Method for the treatment of fiber material
NO20041310A NO20041310L (en) 2002-08-13 2004-03-30 Process for mass processing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10236962.3 2002-08-13
DE10236962A DE10236962A1 (en) 2002-08-13 2002-08-13 Papermaking process compresses slow-speed fibers between a roller with shallow transverse grooves and a smooth interface

Publications (1)

Publication Number Publication Date
WO2004022843A1 true WO2004022843A1 (en) 2004-03-18

Family

ID=30775198

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/008445 Ceased WO2004022843A1 (en) 2002-08-13 2003-07-30 Method for the treatment of fiber material

Country Status (10)

Country Link
US (1) US20070006984A1 (en)
EP (1) EP1521883A1 (en)
JP (1) JP2005535799A (en)
CN (1) CN1697902A (en)
AU (1) AU2003258551A1 (en)
BR (1) BR0305765A (en)
DE (1) DE10236962A1 (en)
NO (1) NO20041310L (en)
RU (1) RU2309211C2 (en)
WO (1) WO2004022843A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005019528A1 (en) * 2003-08-18 2005-03-03 Voith Paper Patent Gmbh Method for refining paper or cellulose fibres in an aqueous suspension

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10337922A1 (en) * 2003-08-18 2005-03-17 Voith Paper Patent Gmbh Refining assembly, for a suspension of papermaking paper/cellulose fibers, forms a fiber layer on the inner surface of the rotating drum with beater rollers pressed against it and a constant liquid flow in and out of the layer
DE10337921A1 (en) * 2003-08-18 2005-03-17 Voith Paper Patent Gmbh Refining assembly, for a suspension of papermaking paper/cellulose fibers, forms a fiber layer on the inner surface of the rotating drum with beater rollers pressed against it and a constant liquid flow in and out of the layer
DE102005016318A1 (en) * 2005-04-09 2006-10-12 Voith Paper Patent Gmbh Process for grinding aqueous suspended paper or pulp fibers and grinding device for its implementation
EP1874999A1 (en) * 2005-04-15 2008-01-09 Voith Patent GmbH Method for preparing paper-fibre raw material
EP1728918A3 (en) 2005-05-12 2006-12-13 Voith Patent GmbH Proces for removing impurities from an aqueous fibrous suspension
EP1798329B1 (en) * 2005-12-17 2010-05-19 Voith Patent GmbH Method for removing impurities from an aqueous fibre suspension
DE102007003964A1 (en) * 2007-01-26 2008-01-24 Voith Patent Gmbh Wood-pulping equipment for paper- or card manufacture, employs compression refiner to complete fiber hydration and separation without damage
US9879361B2 (en) * 2012-08-24 2018-01-30 Domtar Paper Company, Llc Surface enhanced pulp fibers, methods of making surface enhanced pulp fibers, products incorporating surface enhanced pulp fibers, and methods of making products incorporating surface enhanced pulp fibers
CA2940157C (en) 2014-02-21 2018-12-04 Domtar Paper Company Llc Surface enhanced pulp fibers in fiber cement
ES2756299T3 (en) 2014-02-21 2020-04-27 Domtar Paper Co Llc Improved pulp fibers on a substrate surface
NL2013950B1 (en) * 2014-12-10 2016-10-11 Johannes Clumpkens Mathias Method for refining fibres for paper making and apparatus suitable for said process.
US11473245B2 (en) 2016-08-01 2022-10-18 Domtar Paper Company Llc Surface enhanced pulp fibers at a substrate surface
US11499269B2 (en) 2016-10-18 2022-11-15 Domtar Paper Company Llc Method for production of filler loaded surface enhanced pulp fibers
WO2019152969A1 (en) 2018-02-05 2019-08-08 Pande Harshad Paper products and pulps with surface enhanced pulp fibers and increased absorbency, and methods of making same
CN109183489A (en) * 2018-09-25 2019-01-11 福建锐信合成革有限公司 A kind of release paper quetsch
WO2020198516A1 (en) 2019-03-26 2020-10-01 Domtar Paper Company, Llc Paper products subjected to a surface treatment comprising enzyme-treated surface enhanced pulp fibers and methods of making the same
US12116732B2 (en) 2019-09-23 2024-10-15 Domtar Paper Company, Llc Paper products incorporating surface enhanced pulp fibers and having decoupled wet and dry strengths and methods of making the same
CA3150203A1 (en) 2019-09-23 2021-04-01 Bradley Langford Tissues and paper towels incorporating surface enhanced pulp fibers and methods of making the same
WO2021071870A1 (en) 2019-10-07 2021-04-15 Domtar Paper Company, Llc Molded pulp products incorporating surface enhanced pulp fibers and methods of making the same
FR3137398B1 (en) * 2022-06-30 2024-05-31 Centre Technique Du Papier METHOD FOR PROCESSING CELLULOSIC FIBERS BY MECHANICAL COMPRESSION, PARTICULARLY FOR PAPER PULP
FR3157223B1 (en) 2023-12-20 2025-11-14 Centre Technique Du Papier Mechanical and chemical treatment process of cellulosic fibers in a mixer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2592594A (en) * 1948-10-27 1952-04-15 Taylor Refiner Company Inc Method of and machine for treating fibrous or cellulosic material
DE894499C (en) * 1940-02-16 1953-10-26 Belgique Papeteries Device for treating fiber material, in particular paper stock
US2719463A (en) * 1954-01-29 1955-10-04 Anton J Haug Machines for reducing and treating fibrous paper making materials
DE959345C (en) * 1953-10-28 1957-03-07 Anton J Haug Kollermuehle for treating fibrous materials for paper manufacture
WO1986006427A1 (en) * 1985-04-29 1986-11-06 Beloit Corporation Method and apparatus for treating pulp

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534912A (en) * 1967-01-11 1970-10-20 Beloit Corp Low speed refining of a papermaking pulp solution
SE440247B (en) * 1983-11-30 1985-07-22 Folke Eriksson DEVICE FOR CELLULOSAMASSA TREATMENT WITH A CONCENTRATION ABOVE THE FLATABILITY LIMIT

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE894499C (en) * 1940-02-16 1953-10-26 Belgique Papeteries Device for treating fiber material, in particular paper stock
US2592594A (en) * 1948-10-27 1952-04-15 Taylor Refiner Company Inc Method of and machine for treating fibrous or cellulosic material
DE959345C (en) * 1953-10-28 1957-03-07 Anton J Haug Kollermuehle for treating fibrous materials for paper manufacture
US2719463A (en) * 1954-01-29 1955-10-04 Anton J Haug Machines for reducing and treating fibrous paper making materials
WO1986006427A1 (en) * 1985-04-29 1986-11-06 Beloit Corporation Method and apparatus for treating pulp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005019528A1 (en) * 2003-08-18 2005-03-03 Voith Paper Patent Gmbh Method for refining paper or cellulose fibres in an aqueous suspension

Also Published As

Publication number Publication date
BR0305765A (en) 2004-10-05
RU2309211C2 (en) 2007-10-27
US20070006984A1 (en) 2007-01-11
DE10236962A1 (en) 2004-02-26
RU2005106869A (en) 2005-10-10
JP2005535799A (en) 2005-11-24
CN1697902A (en) 2005-11-16
AU2003258551A1 (en) 2004-03-29
AU2003258551A8 (en) 2004-03-29
NO20041310L (en) 2004-03-30
EP1521883A1 (en) 2005-04-13

Similar Documents

Publication Publication Date Title
WO2004022843A1 (en) Method for the treatment of fiber material
EP0438681A1 (en) De-watering apparatus for a twin-wire former
WO2002079568A1 (en) Method for preparing fibrous material
DE69324617T2 (en) Production of foam with high uniformity
EP1035055A2 (en) Method for winding a material web and winding machine to perform the method
EP1702103A1 (en) Method for refining paper or cellulose fibres in an aqueous suspension
DE2724681A1 (en) METHOD AND APPARATUS FOR MAKING MARKINGS IN PAPER Web
AT412483B (en) METHOD AND DEVICE FOR MOORING FIBROUS MATERIALS
DE4002305C2 (en) Drainage device on a twin wire former
EP1874999A1 (en) Method for preparing paper-fibre raw material
DE10337921A1 (en) Refining assembly, for a suspension of papermaking paper/cellulose fibers, forms a fiber layer on the inner surface of the rotating drum with beater rollers pressed against it and a constant liquid flow in and out of the layer
DE10256856A1 (en) Process and device for fiber treatment
EP0863253B1 (en) Process to thicken a fiber suspension
EP1964972B1 (en) Method for producing a coated length of fibre sheet, in particular paper or cardboard
DE19753604C2 (en) Process for dewatering a fiber suspension
DE3586190T2 (en) METHOD FOR PRODUCING HIGH DENSITY PAPER.
EP1096064A2 (en) Process and apparatus for dewatering a fibrous web
EP0267489B1 (en) Process and apparatus for coating and impregnating a non-woven fabric with viscous liquids
EP1702104B1 (en) Method for grinding water-suspended paper fibers or cellulose fibers
DE10337922A1 (en) Refining assembly, for a suspension of papermaking paper/cellulose fibers, forms a fiber layer on the inner surface of the rotating drum with beater rollers pressed against it and a constant liquid flow in and out of the layer
DE2512638A1 (en) METHOD OF DRAINING A FIBER SUSPENSION AND DEVICE FOR CARRYING OUT THE METHOD
WO2019243109A1 (en) Method for producing a wet-laid nonwoven fabric web, and multilayer fiber web
WO2008087107A1 (en) Method for the production of high quality paper
DE2347313A1 (en) METHOD OF CONTROLLING A PAPER MACHINE
EP0779391A1 (en) Method for milling paper fibres

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2003793666

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 20038190443

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 2004533296

Country of ref document: JP

ENP Entry into the national phase

Ref document number: 2005106869

Country of ref document: RU

Kind code of ref document: A

WWP Wipo information: published in national office

Ref document number: 2003793666

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2007006984

Country of ref document: US

Ref document number: 10523063

Country of ref document: US

WWP Wipo information: published in national office

Ref document number: 10523063

Country of ref document: US

WWW Wipo information: withdrawn in national office

Ref document number: 2003793666

Country of ref document: EP