EP2009176A2 - Method for creating multilayer cardboard or packaging paper made from recycled paper - Google Patents

Method for creating multilayer cardboard or packaging paper made from recycled paper Download PDF

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Publication number
EP2009176A2
EP2009176A2 EP08158083A EP08158083A EP2009176A2 EP 2009176 A2 EP2009176 A2 EP 2009176A2 EP 08158083 A EP08158083 A EP 08158083A EP 08158083 A EP08158083 A EP 08158083A EP 2009176 A2 EP2009176 A2 EP 2009176A2
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EP
European Patent Office
Prior art keywords
fiber fraction
cardboard
packaging paper
paper
backsheet
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.)
Withdrawn
Application number
EP08158083A
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German (de)
French (fr)
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EP2009176A3 (en
Inventor
Jürgen Prössl
Harald Selder
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.)
Voith Patent GmbH
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Voith Patent GmbH
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 Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2009176A2 publication Critical patent/EP2009176A2/en
Publication of EP2009176A3 publication Critical patent/EP2009176A3/en
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D99/00—Subject matter not provided for in other groups of this subclass

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • the present invention is directed to the production of multi-ply packaging paper or paperboard, including e.g. Paper or board machines with Mehrlagenstoffauflauf or more headboxes are used. In this case, the position of the cover fabric with fibers of greater length (long pulp) and the layers of the back and / or middle layer with fibers of short length (short fiber) is formed.
  • a packaging paper produced by means of the method or a correspondingly produced cardboard has a cover layer whose composition of matter has the advantage of good optical quality. Since the short fiber fraction formed has an increased number of fibers and a reduced average fiber length in comparison to the starting material, it particularly fulfills the requirements for a blanket layer. Opacity, printability and surface appearance are particularly important for this layer.
  • the method shown process represents the essential process steps of the invention with reference to an example.
  • the pulp solution 1 in which the waste paper M is treated together with water W so that an aqueous pulp suspension S forms.
  • a more or less complex cleaning 2 of the pulp suspension S is necessary. What effort is required to produce a clean pulp is known per se.
  • the cleaning can be omitted.
  • the subsequent fractionation 3 two fiber fractions are formed, of which the short fiber fraction F1 is enriched with short fibers and the long fiber fraction F2 with long fibers.
  • the fractions F1 and F2 thus formed may possibly be further processed in the subsequent part of the stock preparation 4 and then arrive in the two machine huts 5 and 6, respectively.
  • the paper machine 9 generates therefrom the cardboard or the packaging paper.
  • the horizontally separated chambers are supplied via a fuel pump 7 with the short fiber fraction F1 from the machine chest 5 or via a fuel pump 8 with the long fiber fraction F2 from the machine chest 6.
  • an upper material jet 11 containing the short fiber fraction F1 is formed and a lower substance jet 12 containing the long-fiber fraction F2.
  • the ceiling layer 13 (FIG. Fig. 2 ) and from the lower fabric jet 12, the backsheet 14th
  • a particularly suitable fractionator for this purpose is a pressure sorter for wet sifting of the sort of a pressure sorter. This is the DE 199 13 515 A1 a specially designed slotted screen for such a fractionator removed. But even with highly efficient hydrocyclones, so-called cleaners, it is possible to carry out a fractionation according to fiber flexibility.
  • Fig. 2 shows a two-ply packaging paper with a cover layer 13 and a rear side layer 14.
  • the cover layer 13 is provided in many cases with an imprint 16.
  • the upper side 15 of the cover layer 13 has a good printable surface due to the high short fiber content.
  • Another advantage is the high opacity, which means that any existing impurities of the underlying layer or layers little disturb.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

The method involves producing an aqueous fibrous material suspension (s), cleaning (2) of the fibrous material suspension, if it contains disturbing impurities. Fractionation (3) of the fibrous material suspension into a short fiber fraction (F1) is done with increased short fibers and a long fiber fraction (F2). The fractions are utilized during the production of a packaging paper or cardboard having cover position and a back position (11).

Description

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

Es ist bekannt, in mehrlagigen Papier- oder Kartonprodukten unterschiedliche Stoffsorten zu verwenden. Dabei kann man sowohl durch Wal der Rohstoffe, als auch in geeigneten Verfahrensschritten der Stoffaufbereitung gezielt Einfluss auf die später auf der Papiermaschine erzeugten Papier- oder Karton-Qualität nehmen. Auf diese Weise werden - wie an sich bekannt - den Wünschen entsprechend die Eigenschaften des Papier- oder Kartonproduktes gesteuert. Die vorliegende Erfindung zielt insbesondere auf die Erzeugung von mehrlagigem Verpackungspapier oder Karton, wozu z.B. Papier- oder Kartonmaschinen mit Mehrlagenstoffauflauf oder mehreren Stoffaufläufen verwendet werden. Dabei wird die Lage des Deckenstoffes mit Fasern größerer Länge (Langfaserstoff) und die Lagen der Rückseite und/oder Mittelschicht mit Fasern geringer Länge (Kurzfaserstoff) gebildet.It is known to use different types of fabrics in multi-ply paper or board products. In doing so, one can specifically influence the paper or board quality produced later on the paper machine, both by whale raw materials and in suitable processing steps of stock preparation. In this way - as is known - the wishes of the properties of the paper or cardboard product controlled. In particular, the present invention is directed to the production of multi-ply packaging paper or paperboard, including e.g. Paper or board machines with Mehrlagenstoffauflauf or more headboxes are used. In this case, the position of the cover fabric with fibers of greater length (long pulp) and the layers of the back and / or middle layer with fibers of short length (short fiber) is formed.

Bei der Wahl der einzusetzenden Rohstoffe spielen neben der Qualität auch ihre Kosten eine beträchtliche Rolle. Das Bestreben, möglichst preiswerte Rohstoffe zu verwenden, sowie abfallwirtschaftliche Gesichtspunkte führen dazu, dass in vielen Fällen gemischte Rohstoffe, z.B. Altpapiere, mit breitem Faserlängenspektrum in der Produktion eingesetzt werden sollen.In choosing the raw materials to be used, not only quality but also their costs play a significant role. The endeavor to use raw materials which are as inexpensive as possible, as well as waste management considerations, mean that in many cases mixed raw materials, e.g. Waste papers with a broad fiber length spectrum are to be used in production.

Es ist Aufgabe der Erfindung, ein Verfahren zu schaffen, mit dem es gelingt, die Qualität des Papiers oder Kartons auf besonders einfache und wirtschaftliche Art zu verbessern und/oder die Kosten zu senken.It is an object of the invention to provide a method with which it is possible to improve the quality of the paper or cardboard in a particularly simple and economical way and / or to reduce costs.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is solved by the features of claim 1.

Ein mit Hilfe des Verfahrens hergestelltes Verpackungspapier oder ein entsprechend hergestellter Karton weist eine Deckenlage auf, deren Stoffzusammensetzung den Vorteil einer guten optischen Qualität hat. Da die gebildete Kurzfaserfraktion im Vergleich zum Ausgangsrohstoff eine erhöhte Faseranzahl und eine reduzierte mittlere Faserlänge hat, erfüllt sie in besonderer Weise die Anforderungen an eine Deckenlage. Opazität, Bedruckbarkeit und Oberflächenaussehen sind für diese Schicht besonders wichtig.A packaging paper produced by means of the method or a correspondingly produced cardboard has a cover layer whose composition of matter has the advantage of good optical quality. Since the short fiber fraction formed has an increased number of fibers and a reduced average fiber length in comparison to the starting material, it particularly fulfills the requirements for a blanket layer. Opacity, printability and surface appearance are particularly important for this layer.

Die Erfindung wird erläutert an Hand von Zeichnungen. Dabei zeigen:

Fig. 1
eine schematische Darstellung der wesentlichen Verfahrensschritte;
Fig. 2
Stück eines erfindungsgemäß produzierten zweilagigen Verpackungspapiers.
The invention will be explained with reference to drawings. Showing:
Fig. 1
a schematic representation of the essential process steps;
Fig. 2
Piece of a two-ply packaging paper produced according to the invention.

Das in einer Fig. 1 gezeigte Verfahrensschema stellt die wesentlichen Verfahrensschritte der Erfindung an Hand eines Beispiels dar. Zunächst erfolgt die Stofflösung 1, bei der das Altpapier M zusammen mit Wasser W so behandelt wird, dass sich eine wässrige Faserstoffsuspension S bildet. Meistens ist anschließend eine mehr oder weniger aufwändige Reinigung 2 der Faserstoffsuspension S notwendig. Welcher Aufwand zur Herstellung eines sauberen Papierstoffes erforderlich ist, ist an sich bekannt. In Fällen, in denen ein von vorneherein sauberer Rohstoff (z.B. Papiermaschinen-Ausschuss) eingesetzt wird, kann die Reinigung auch entfallen. In der sich anschließenden Fraktionierung 3 werden zwei Faserfraktionen gebildet, von denen die Kurzfaserfraktion F1 mit kurzen Fasern angereichert ist und die Langfaserfraktion F2 mit langen Fasern.That in one Fig. 1 The method shown process represents the essential process steps of the invention with reference to an example. First, the pulp solution 1, in which the waste paper M is treated together with water W so that an aqueous pulp suspension S forms. Mostly then a more or less complex cleaning 2 of the pulp suspension S is necessary. What effort is required to produce a clean pulp is known per se. In cases where a clean from the outset raw material (eg paper machine committee) is used, the cleaning can be omitted. In the subsequent fractionation 3 two fiber fractions are formed, of which the short fiber fraction F1 is enriched with short fibers and the long fiber fraction F2 with long fibers.

Die so gebildeten Fraktionen F1 und F2 werden im nachfolgenden Teil der Stoffaufbereitung 4 eventuell noch weiter bearbeitet und gelangen dann in die beiden Maschinenbütten 5 bzw. 6. Die Papiermaschine 9 erzeugt daraus den Karton oder das Verpackungspapier. Zu diesem Zweck weist sie hier einen Zweischichtstoffauflauf 10 auf, dessen horizontal getrennte Kammern über eine Stoffpumpe 7 mit der Kurzfaserfraktion F1 aus der Maschinenbütte 5 bzw. über eine Stoffpumpe 8 mit der Langfaserfraktion F2 aus der Maschinenbütte 6 versorgt werden. Am Austritt aus dem Zwischenschicht-Stoffauflauf 10 bildet sich ein die Kurzfaserfraktion F1 enthaltender oberer Stoffstrahl 11 sowie ein die Langfaserfraktion F2 enthaltender unterer Stoffstrahl 12. Aus dem oberen Stoffstrahl 11 wird die Deckenlage 13 (Fig. 2) und aus dem unteren Stoffstrahl 12 die Rückseitenlage 14.The fractions F1 and F2 thus formed may possibly be further processed in the subsequent part of the stock preparation 4 and then arrive in the two machine huts 5 and 6, respectively. The paper machine 9 generates therefrom the cardboard or the packaging paper. For this purpose, it has here a two-layer casserole 10, the horizontally separated chambers are supplied via a fuel pump 7 with the short fiber fraction F1 from the machine chest 5 or via a fuel pump 8 with the long fiber fraction F2 from the machine chest 6. At the exit from the intermediate layer head box 10, an upper material jet 11 containing the short fiber fraction F1 is formed and a lower substance jet 12 containing the long-fiber fraction F2. From the upper substance jet 11, the ceiling layer 13 (FIG. Fig. 2 ) and from the lower fabric jet 12, the backsheet 14th

Die erwähnte Aufteilung in die Kurzfaserfraktion und die Langfaserfraktion wird mit mindestens einer Fraktioniermaschine durchgeführt. Besonders geeignet ist z.B. ein Siebfraktionator mit einem Rotor gemäß der deutschen Patentanmeldung DE 199 51 711.8 .The mentioned division into the short fiber fraction and the long fiber fraction is carried out with at least one fractionating machine. For example, a Siebfraktionator with a rotor according to the German patent application is particularly suitable DE 199 51 711.8 ,

Ein zu diesem Zweck besonders geeigneter Fraktionator ist ein Druckapparat zur Nasssiebung von der Art eines Drucksortierers. Dazu ist der DE 199 13 515 A1 ein speziell ausgestaltetes Schlitzsieb für einen solchen Fraktionator entnehmbar. Aber auch mit hochwirksamen Hydrozyklonen, sogenannten Cleanern, ist es möglich, eine Fraktionierung nach Faserflexibilität vorzunehmen.A particularly suitable fractionator for this purpose is a pressure sorter for wet sifting of the sort of a pressure sorter. This is the DE 199 13 515 A1 a specially designed slotted screen for such a fractionator removed. But even with highly efficient hydrocyclones, so-called cleaners, it is possible to carry out a fractionation according to fiber flexibility.

Fig. 2 zeigt ein zweilagiges Verpackungspapier mit einer Deckenlage 13 und einer Rückseitenlage 14. Die Deckenlage 13 wird in vielen Fällen mit einem Aufdruck 16 versehen. Durch das erfindungsgemäße Verfahren hat die Oberseite 15 der Deckenlage 13 eine gut bedruckbare Oberfläche infolge des hohen Kurzfasergehaltes. Ein weiterer Vorteil ist die hohe Opazität, die dazu führt, dass eventuell vorhandene Unsauberkeiten der darunter liegenden Schicht oder Schichten wenig stören. Fig. 2 shows a two-ply packaging paper with a cover layer 13 and a rear side layer 14. The cover layer 13 is provided in many cases with an imprint 16. By the method according to the invention, the upper side 15 of the cover layer 13 has a good printable surface due to the high short fiber content. Another advantage is the high opacity, which means that any existing impurities of the underlying layer or layers little disturb.

Claims (6)

Verfahren zur Erzeugung von mehrlagigem Karton oder Verpackungspapier, insbesondere aus gemischtem Altpapier (M) mit folgenden Schritten: a) Herstellung einer wässrigen Faserstoffsuspension (S); b) Reinigung (2) der Faserstoffsuspension (S), sofern sie störende Verunreinigungen enthält; c) Fraktionierung (3) der Faserstoffsuspension (S) in eine Kurzfaserfraktion (F1) mit vermehrt kurzen Fasern und eine Langfaserfraktion (F2) mit vermehrt langen Fasern; d) Verwendung der Fraktionen bei der Produktion von einem mindestens eine Deckenlage (13) und eine Rückseitenlage (11) aufweisenden Verpackungspapier oder Karton, dadurch gekennzeichnet,
dass aus der Kurzfaserfraktion (F1) die Deckenlage gebildet wird.Method of producing multilayer cardboard or packaging paper, in particular of mixed waste paper (M), comprising the following steps: a) preparation of an aqueous pulp suspension (S); b) cleaning (2) the pulp suspension (S) if it contains interfering impurities; c) fractionation (3) of the pulp suspension (S) into a short fiber fraction (F1) with increasingly short fibers and a long fiber fraction (F2) with increasingly long fibers; d) use of the fractions in the production of a packaging paper or cardboard having at least one cover layer (13) and one backsheet (11), characterized,
that the ceiling layer is formed from the short fiber fraction (F1). Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
dass zur Fraktionierung (3) mindestens ein Drucksortierer verwendet wird, in dem mit Hilfe eines Nasssiebes die Faserstoffsuspension (S) so fraktioniert wird, dass die Langfaserfraktion (F2) in den Überlauf und die Kurzfaserfraktion (F1) in den Durchlauf gelangt.Method according to claim 1,
characterized,
in that at least one pressure sorter is used for the fractionation (3) in which the pulp suspension (S) is fractionated with the aid of a wet sieve in such a way that the long fiber fraction (F2) enters the overflow and the short fiber fraction (F1) into the flow. Verfahren nach Anspruch 2,
dadurch gekennzeichnet,
dass für die Fraktionierung (3) Siebe eingesetzt werden mit Schlitzen, deren Schlitzweite 0,3 bis 1 mm beträgt.Method according to claim 2,
characterized,
that for the fractionation (3) sieves are used with slots whose slot width is 0.3 to 1 mm. Verfahren nach Anspruch 1, 2 oder 3,
dadurch gekennzeichnet,
dass aus der Langfaserfraktion (F2) die Rückseitenlage gebildet wird.Method according to claim 1, 2 or 3,
characterized,
that from the long fiber fraction (F2), the backsheet is formed. Verfahren nach Anspruch 1, 2 oder 3,
dadurch gekennzeichnet,
dass mindestens dreilagiges Verpackungspapier oder mindestens dreilagiger Karton produziert wird, wobei aus der Langfaserfraktion (F2) die Mittellage gebildet wird und aus der Kurzfaserfraktion (F1) Decken- und Rückseitenlage.Method according to claim 1, 2 or 3,
characterized,
that at least three-ply packaging paper or at least three-ply cardboard is produced, wherein from the long fiber fraction (F2) the middle layer is formed and from the short fiber fraction (F1) top and backsheet. Verfahren nach Anspruch 1, 2 oder 3,
dadurch gekennzeichnet,
dass mindestens dreilagiges Verpackungspapier oder mindestens dreilagiger Karton produziert wird, wobei aus der Langfaserfraktion (F2) Mittellage und Rückseitenlage gebildet werden.Method according to claim 1, 2 or 3,
characterized,
that at least three-ply packaging paper or at least three-ply cardboard is produced, wherein from the long fiber fraction (F2) center layer and backsheet are formed.
EP08158083A 2007-06-27 2008-06-12 Method for creating multilayer cardboard or packaging paper made from recycled paper Withdrawn EP2009176A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007029805A DE102007029805A1 (en) 2007-06-27 2007-06-27 Process for producing multi-ply cardboard or wrapping paper from waste paper

Publications (2)

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EP2009176A2 true EP2009176A2 (en) 2008-12-31
EP2009176A3 EP2009176A3 (en) 2011-11-23

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EP08158083A Withdrawn EP2009176A3 (en) 2007-06-27 2008-06-12 Method for creating multilayer cardboard or packaging paper made from recycled paper

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102493248A (en) * 2011-12-20 2012-06-13 杭州富伦生态科技有限公司 Method for producing regenerated kraft paper by using waste paper aluminium plastic composite packing materials
WO2014044475A1 (en) * 2012-09-21 2014-03-27 Voith Patent Gmbh Fractionation
US10041209B1 (en) 2015-08-21 2018-08-07 Pulmac Systems International, Inc. System for engineering fibers to improve paper production
US10941520B2 (en) 2015-08-21 2021-03-09 Pulmac Systems International, Inc. Fractionating and refining system for engineering fibers to improve paper production
US11214925B2 (en) 2015-08-21 2022-01-04 Pulmac Systems International, Inc. Method of preparing recycled cellulosic fibers to improve paper production

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19951711A1 (en) 1999-10-27 2001-05-03 Voith Paper Patent Gmbh Method and device for fractionating a suspension containing paper fibers

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FI92729C (en) * 1993-10-29 1994-12-27 Valmet Paper Machinery Inc Multilayer headbox pulp feed system and method in multilayer headbox operation
DE19526205C2 (en) * 1995-07-18 2000-08-17 Voith Sulzer Stoffaufbereitung Process and plant for producing a multilayer paper or cardboard web
DE19833441A1 (en) * 1998-07-24 2000-01-27 Voith Sulzer Papiertech Patent Production of a sieve basket to sort fiber suspensions into fractions has a profiled rod wound in coils with spacers to keep them apart to form the sieve slits between them
DE19910797A1 (en) * 1999-03-11 2000-09-14 Voith Sulzer Papiertech Patent Sorting fibers in a suspension uses a wet sieve action with short fibers passing through the sieve for outer paper/cardboard layers and longer fibers in a fraction over the sieve for the inner layer
FI113789B (en) * 1999-10-20 2004-06-15 Upm Kymmene Corp Method and apparatus for making sheet paper or board
FI118809B (en) * 2006-09-11 2008-03-31 M Real Oyj Process for the manufacture of a fiber product

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19951711A1 (en) 1999-10-27 2001-05-03 Voith Paper Patent Gmbh Method and device for fractionating a suspension containing paper fibers

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102493248A (en) * 2011-12-20 2012-06-13 杭州富伦生态科技有限公司 Method for producing regenerated kraft paper by using waste paper aluminium plastic composite packing materials
WO2014044475A1 (en) * 2012-09-21 2014-03-27 Voith Patent Gmbh Fractionation
CN104755672A (en) * 2012-09-21 2015-07-01 福伊特专利有限公司 Coated steel stranded cable, and method for manufacturing same
CN104755672B (en) * 2012-09-21 2017-03-08 福伊特专利有限公司 Fractional method
US10041209B1 (en) 2015-08-21 2018-08-07 Pulmac Systems International, Inc. System for engineering fibers to improve paper production
US10400394B2 (en) 2015-08-21 2019-09-03 Pulmac Systems International, Inc. Method for engineering fibers to improve paper production
US10941520B2 (en) 2015-08-21 2021-03-09 Pulmac Systems International, Inc. Fractionating and refining system for engineering fibers to improve paper production
US11214925B2 (en) 2015-08-21 2022-01-04 Pulmac Systems International, Inc. Method of preparing recycled cellulosic fibers to improve paper production

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EP2009176A3 (en) 2011-11-23
DE102007029805A1 (en) 2009-01-02

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