WO2022063456A1 - Machine et procédé permettant de produire et/ou de manipuler une bande de papier brut de carton ondulé - Google Patents

Machine et procédé permettant de produire et/ou de manipuler une bande de papier brut de carton ondulé Download PDF

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Publication number
WO2022063456A1
WO2022063456A1 PCT/EP2021/070221 EP2021070221W WO2022063456A1 WO 2022063456 A1 WO2022063456 A1 WO 2022063456A1 EP 2021070221 W EP2021070221 W EP 2021070221W WO 2022063456 A1 WO2022063456 A1 WO 2022063456A1
Authority
WO
WIPO (PCT)
Prior art keywords
web
glue
application
base paper
corrugated
Prior art date
Application number
PCT/EP2021/070221
Other languages
German (de)
English (en)
Inventor
Johann Moser
Original Assignee
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 WO2022063456A1 publication Critical patent/WO2022063456A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • 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
    • D21F11/12—Making corrugated paper or board
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/70—Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group
    • D21H23/72—Plural serial stages only

Definitions

  • the invention relates to a machine for producing and/or treating a corrugated base paper web, in particular a testliner web or a CM or corrugated web (CM: Corrugated Medium) based on waste paper or kraft liner web based on short fibers, for example eucalyptus, in which the corrugated base paper web is surface glued both on the upper side and on the underside. It also relates to a method that can be carried out using the machine in particular for the production and/or treatment of a corrugated base paper web, in particular a testliner web or a CM or corrugated web based on waste paper or a kraft liner web based on short fibers, for example eucalyptus.
  • CM Corrugated Medium
  • Corrugated base paper such as in particular testliner and CM or corrugated paper
  • testliner is the generic term for paper consisting predominantly of waste paper, in particular paper from department stores, with masses per unit area of 80 to 160 g/m 2 , which are used as a flat web in the manufacture of corrugated cardboard.
  • CM or corrugated paper is used as a corrugated web in the manufacture of corrugated cardboard.
  • the finished corrugated cardboard product is obtained by connecting a testliner web to a CM or corrugated web, in particular by gluing.
  • the required level of strength such as the required bursting strength, the required compression resistance SCT and the other compression and compressive strengths RCT (Ring Crush Test) and CMT (Corrugated Medium Test), can usually only be achieved inexpensively with surface sizing.
  • Film coating units such as film presses (eg SpeedSizer) for applying glue are also already known. Previously, the glue was applied simultaneously, ie in the direction of web travel at the same point on the top and bottom of the web.
  • the invention is based on the object of specifying a machine and a method of the type mentioned at the beginning, in which the disadvantages mentioned above are eliminated.
  • the risk of web breaks should be minimized and the threading of the web should be simplified in the simplest and most efficient manner possible.
  • Preferred embodiment variants of the machine according to the invention result from the dependent claims, the present description and the drawing.
  • the first application of glue which takes place only on one side of the corrugated base paper web in the direction of web travel, preferably takes place in the direction of web travel after pre-drying of the corrugated base paper web, which takes place in particular in a pre-drying section.
  • the web of corrugated base paper has thus already reached a certain dry content during the first application of glue in the direction of travel of the web, so that the most efficient possible application of glue is ensured.
  • the corrugated base paper web is placed on a transfer screen in the direction of web travel immediately after the first application of glue and before the second application of glue and immediately after the second application of glue and is dried immediately.
  • the web is completely mechanically supported from the moment the glue is applied. This way the web cannot tear. This increases the runability of the machine.
  • a respective post-drying of the corrugated base paper web is preferably carried out on the side of the web on which glue was previously applied.
  • a total of glue with a weight per unit area of up to about 10 g/m 2 and a solids content of 8% to 18% is applied to both sides of the web of corrugated base paper. This ensures adequate strength of the corrugated base paper web.
  • the first application of glue and/or the separate and spaced-apart second application of glue are each carried out by means of a film press as the glue application unit, in particular by means of a film press with a solid roller as an application roller and a suction roller.
  • the suction roller guarantees that the web is deposited on the transfer wire immediately after the glue application. The web cannot run with the application roller.
  • rollers of a respective film press are each provided with a roller cover, in particular a roller cover based on rubber, polyurethane or polyurethane with a pigment matrix. Rollers with such a roller cover can each optimally adapt to the respective counter-roller, which ensures that glue is applied as uniformly as possible over the width of the web.
  • the corrugated base paper web is preferably continuously supported in the direction of web travel immediately after each application of glue up to a dry content of at least 75%, preferably up to a dry content of about 93% or 94%, by means of a respective air-permeable transfer belt.
  • Air dryers are expediently provided for the contactless post-drying of the corrugated base paper web after a respective application of glue.
  • a respective air dryer is preferably designed for an impingement air speed in the range from about 90 m/sec to about 120 m/sec and/or for generating an air temperature of about 150° C. to about 350° C. This ensures that the respective glue application is solidified as quickly and reliably as possible.
  • a respective air-permeable transfer belt supporting the corrugated base paper web after a respective application of glue is guided through the press nip of the relevant film press, being guided into the press nip in particular via the suction roll of the film press.
  • the path of the railway is thus clearly defined.
  • the suction roll of the film press that defines the web run through a respective film press is designed for a vacuum of up to 60 kPa, in particular for a vacuum of up to 40 kPa and preferably for a vacuum of at least 15 kPa.
  • the corrugated base paper web expediently runs unsupported or freely in the direction of web travel between the first application of glue and the second application of glue after a dry content of >80% has been reached.
  • Preferred practical embodiments of the machine according to the invention are characterized in that the corrugated base paper web is held on a respective air-permeable transfer belt by means of stabilization boxes to which a vacuum is applied, the vacuum of the stabilization boxes being in particular up to 2000 Pa and preferably around 800 Pa, and/or a each air-permeable transfer belt comprises a screen fabric or a belt with perforations, preferably a belt provided with perforations without cranking points, the belt having a free, open area of in particular at least 50%, preferably about 75%, and/or a respective air-permeable transfer belt is assigned a screen cleaning device, in particular a so-called DuoCleaner system for zone-by-zone cleaning across the width of the felt belt, and/or the tension of a respective air-permeable transfer belt is a maximum of 10 kNm and preferably in the range of 3.5 kN / m lies.
  • a respective air-permeable transfer belt comprises an air-permeable belt provided with a perforation without offset points, web markings due to nip forces in the glue application nip are avoided.
  • a corrugated base paper web in particular a testliner web or a CM or corrugated web (CM: Corrugated Medium) based on waste paper or a kraft liner web based on short fibers, for example from Eucalyptus, in which the corrugated base paper web is surface-sized both on its upper side and on its underside, is characterized in that, in particular to minimize web breaks on and after the glue application, the glue application on the upper side and the glue application on the underside of the corrugated base paper web are carried out by means of separate glue application units take place separately in the direction of web travel at a predetermined or specifiable distance from one another.
  • CM Corrugated Medium
  • the glue can be applied first to the upper side or first to the underside of the corrugated base paper web in the direction of web travel.
  • Fig. 1 is a schematic representation of an exemplary embodiment with reference to the drawing; in this show:
  • Fig. 1 is a schematic representation of an exemplary embodiment with reference to the drawing; in this show:
  • Fig. 1 is a schematic representation of an exemplary embodiment with reference to the drawing; in this show:
  • FIG. 2 shows a schematic representation of an exemplary alternative embodiment of the transfer section provided after the second application of glue with post-drying.
  • Fig. 1 shows a schematic representation of an exemplary embodiment of a machine 10 according to the invention for the production and/or treatment of a corrugated base paper web 12.
  • the corrugated base paper web 12 can in particular be a testliner web or a CM or corrugated web (CM: Corrugated Medium) on the Act on the basis of waste paper or a kraftliner web based on short fibers, for example eucalyptus.
  • CM Corrugated Medium
  • the web of corrugated base paper 12 is surface-sized both on its upper side and on its underside.
  • the glue is applied to the upper side and the glue is applied to the underside of the corrugated base paper web 12 by means of separate glue application units 16, 18, mechanically supported separately in the direction of web travel L by means of a transfer belt, at a predetermined or specifiable distance from one another is defined by the required drying distance.
  • the glue can be applied first to the upper side or first to the underside of the corrugated base paper web in the direction of web travel.
  • the glue is first applied to the upper side of the corrugated base paper web 12 in an upper side gluing section 20 and only then in a lower side
  • the first application of glue which takes place in web direction L only on the upper side of the corrugated base paper web 12, takes place in the web travel direction L after pre-drying of the corrugated base paper web 12, which takes place in particular in a pre-drying section 26.
  • the corrugated base paper web 12 is dried in the direction of web travel L immediately after the first application of glue and before the second application of glue and immediately after the second application of glue. In this case, subsequent drying of the corrugated base paper web 12 takes place in a contactless manner.
  • glue with a basis weight of up to about 10 g/m 2 and a solids content of 8% to 18% can be applied to both sides of the corrugated base paper web 12 .
  • the first application of glue and the second application of glue are each carried out by means of a film press 16; 18 as a glue application unit with a solid roller 16', 18' as an application roller and a suction roller 16", 18".
  • the rolls of a respective film press 16, 18 can each be provided with a roll cover, in particular a roll cover based on rubber, polyurethane or polyurethane with a pigment matrix.
  • the web of corrugated cardboard base paper 12 is continuously supported in web direction L immediately after each application of glue up to a dry content of at least 75%, preferably up to a dry content of about 93% or 94% by means of a respective air-permeable transfer belt 26, 28.
  • Air dryers 32 are provided for contactless post-drying of the corrugated base paper web 12 after a respective application of glue.
  • a respective air dryer 32 can be designed, for example, for an impingement air speed in the range from about 90 m/sec to about 120 m/sec and/or for generating an air temperature of about 150° C. to about 350° C.
  • the suction roll 16", 18" of the film press that defines the web run through a respective film press 16', 18' can be designed for a vacuum of up to 60 kPa, in particular for a vacuum of up to 40 kPa, whereby it is preferably designed for a vacuum of at least 15 kPa is designed.
  • the corrugated base paper web 12 can run unsupported or freely after a dry content of >80% has been reached.
  • the web of corrugated cardboard base paper 12 is held on the respective air-permeable transfer belt 28, 30 by means of stabilization boxes 34 to which negative pressure is applied.
  • the negative pressure of the stabilization boxes 34 can in each case be up to 2000 Pa in particular, with it preferably being around 800 Pa.
  • a respective air-permeable transfer belt 28, 30 can comprise a screen fabric or a belt with perforations, in particular a belt provided with perforations without cranking points, the belt having a free, open area of in particular at least 50%, preferably around 75%.
  • the transfer belts 28; 30 can each be assigned a screen cleaning device 36, in particular a so-called DuoCleaner system for zone-by-zone cleaning across the width of the felt belt.
  • the tension of a respective air-permeable transfer belt 28; 30 is at most 10 kN/m, preferably in the range of 3.5 kN/m.
  • a transfer section 24 with two suction rollers 38, 40 is provided, around which a screen 42 is guided, through which the finished, glued corrugated base paper web 12 is taken over by the transfer belt 30 of the underside gluing section 22.
  • the corrugated base paper web 12 can be fed to a calender, for example, or run directly to a pope roller.
  • a pulper 44 or 46 i.e. pulper, can be assigned to the transfer belt 28 running out of the upper side sizing section 20 and to the wire 42 that is led out of the transfer section 24.
  • Fig. 2 shows a schematic representation of an exemplary alternative embodiment of the transfer section 24 provided after the second application of glue with post-drying the corrugated base paper web 12 glued on both sides is taken over by the transfer belt 30. After that she can Corrugated base paper web 12, for example, fed back to a calender or run directly to a pope roller.

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Abstract

L'invention se rapporte à une machine permettant de produire et/ou de manipuler une bande de papier brut de carton ondulé, en particulier une bande de couverture spéciale ou une bande de CM ou ondulée sur la base d'un papier recyclé ou une bande de couverture kraft sur la base de fibres courtes, telles que l'eucalyptus, la bande de papier brut de carton ondulé étant collée en surface sur le côté supérieur et sur le côté inférieur de celle-ci. En particulier, pour réduire à un minimum des déchirures de la bande lors de l'application de colle et après celle-ci, l'application de colle sur le côté supérieur et l'application de colle sur le côté inférieur de la bande de papier brut de carton ondulé se produisent de manière séparée au moyen d'ensembles d'application de colle séparés à une distance spécifiée ou pouvant être spécifiée les uns des autres dans la direction de déplacement de bande. L'invention se rapporte également à un procédé permettant de produire et/ou de manipuler une bande de papier brut de carton ondulé, en particulier une bande de couverture spéciale ou une bande de CM ou ondulée sur la base d'un papier recyclé ou d'une bande de couverture kraft sur la base de fibres courtes, telles que l'eucalyptus, en particulier la machine selon l'invention pouvant être utilisée pour mettre en œuvre ledit procédé.
PCT/EP2021/070221 2020-09-25 2021-07-20 Machine et procédé permettant de produire et/ou de manipuler une bande de papier brut de carton ondulé WO2022063456A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020125040.1 2020-09-25
DE102020125040.1A DE102020125040A1 (de) 2020-09-25 2020-09-25 Maschine und verfahren zur herstellung und/oder behandlung einer wellpappenrohpapierbahn

Publications (1)

Publication Number Publication Date
WO2022063456A1 true WO2022063456A1 (fr) 2022-03-31

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Application Number Title Priority Date Filing Date
PCT/EP2021/070221 WO2022063456A1 (fr) 2020-09-25 2021-07-20 Machine et procédé permettant de produire et/ou de manipuler une bande de papier brut de carton ondulé

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DE (1) DE102020125040A1 (fr)
WO (1) WO2022063456A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023025463A1 (fr) * 2021-08-24 2023-03-02 Voith Patent Gmbh Machine de production et/ou de traitement d'une bande de fibres

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19704858A1 (de) * 1997-02-10 1998-08-13 Voith Sulzer Papiermasch Gmbh Verfahren und Vorrichtung zum Herstellen beidseitig gestrichener Papierbahnen
WO2005028751A1 (fr) * 2003-09-22 2005-03-31 Metso Paper, Inc. Procede pour produire une bande de papier ou de carton encollee en surface
DE102009002207A1 (de) * 2009-04-06 2010-10-14 Voith Patent Gmbh Vorrichtung zum Auftrag von flüssigem oder pastösem Auftragsmedium auf eine Faserstoffbahn

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5378497A (en) 1993-02-10 1995-01-03 Westvaco Corporation Method for providing irreversible smoothness in a paper rawstock
DE102004036276A1 (de) 2004-07-27 2006-02-16 Voith Paper Patent Gmbh Verfahren und Vorrichtung zum Aufbringen eines Auftragmediums in einer Maschine zur Herstellung einer Faserstoffbahn

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19704858A1 (de) * 1997-02-10 1998-08-13 Voith Sulzer Papiermasch Gmbh Verfahren und Vorrichtung zum Herstellen beidseitig gestrichener Papierbahnen
WO2005028751A1 (fr) * 2003-09-22 2005-03-31 Metso Paper, Inc. Procede pour produire une bande de papier ou de carton encollee en surface
DE102009002207A1 (de) * 2009-04-06 2010-10-14 Voith Patent Gmbh Vorrichtung zum Auftrag von flüssigem oder pastösem Auftragsmedium auf eine Faserstoffbahn

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023025463A1 (fr) * 2021-08-24 2023-03-02 Voith Patent Gmbh Machine de production et/ou de traitement d'une bande de fibres

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Publication number Publication date
DE102020125040A1 (de) 2022-03-31

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