EP3358074B1 - Procédé de fabrication d'une bande fibreuse multicouche ayant une couche de surface blanche - Google Patents

Procédé de fabrication d'une bande fibreuse multicouche ayant une couche de surface blanche Download PDF

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Publication number
EP3358074B1
EP3358074B1 EP17200955.7A EP17200955A EP3358074B1 EP 3358074 B1 EP3358074 B1 EP 3358074B1 EP 17200955 A EP17200955 A EP 17200955A EP 3358074 B1 EP3358074 B1 EP 3358074B1
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EP
European Patent Office
Prior art keywords
white
pulp web
ply
fibrous web
press
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.)
Active
Application number
EP17200955.7A
Other languages
German (de)
English (en)
Other versions
EP3358074A1 (fr
Inventor
Georg Bacovsky
Michael Stern
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.)
Andritz AG
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Andritz AG
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Publication date
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Publication of EP3358074A1 publication Critical patent/EP3358074A1/fr
Application granted granted Critical
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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
    • D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type
    • D21F9/006—Complete machines for making continuous webs of paper of the twin-wire type paper or board consisting of two or more layers
    • 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
    • D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
    • D21F11/04—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type paper or board consisting on two or more layers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/14—Drying webs by applying vacuum
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes

Definitions

  • the subject of this invention is a process for producing a multilayer fibrous web with a white top layer, optionally one or more intermediate layers and a supine layer.
  • the individual layers of the fibrous web are formed in a forming section and vergautscht together so that the white cover layer forms the bottom of the multilayer fibrous web.
  • the multilayer fibrous web is dewatered in a press section.
  • white-covered testliner coated or uncoated
  • white top testliner white-topped kraftliner
  • white-covered Krafttopliner Ker Top White
  • plasterboard Paster Board Liner
  • paperboard carton white lined chipboard
  • liquid packaging board liquid packaging board
  • folding box board primarily white-covered testliner (coated or uncoated) also known as white top testliner or white-topped kraftliner (White Top Kraftliner) or white-covered Krafttopliner (Kraft Top White), or plasterboard (Paster Board Liner), paperboard carton, white lined chipboard, liquid packaging board, or folding box board.
  • the white cover layer forms the underside of the multilayer fibrous web ("upsidedown production"), because in the subsequent press section in particular the underside of the fibrous web is smoothed (see, eg WO 01/44569 A1 ).
  • a smooth white top layer is a prerequisite in many manufacturing processes.
  • the supine and possibly also the intermediate layers consist of fibers which have a lower whiteness than the white cover layer.
  • the upper sieve After covering the multilayer fibrous web, the upper sieve must be lifted off the fibrous web and the fibrous web must continue to run on the lower sieve. For this to work reliably, there is a vacuum cleaner under the lower sieve, which ensures that the fibrous web adheres to the lower sieve and does not run along with the lifting upper sieve. Often even more suction boxes are arranged in the lower sieve, through which the vergautschte fibrous web is further dehydrated. However, the suction effect of the vacuum cleaner or the bottom suction boxes also sucks dirty water from the supine position in the white top layer, which thereby loses whiteness.
  • the object of the present invention is to disclose a production method for producing a multilayer fibrous web with a smooth white cover layer, in which the whiteness of the cover layer is improved over conventional methods.
  • This manufacturing process is particularly well suited for the production of White Top Testliner, White Top Kraftliner, Kraft Top White Liner, Plaster Board Liner, White Lined Chipboard, Liquid Packaging Board or Folding Box Board.
  • the upward vacuum dewatering after gassing preferably takes place with the aid of a suction box arranged above the fibrous web.
  • This suction box is thus arranged in the upper sieve, it can also be made.
  • the multilayer fibrous web passes through the subsequent press section such that the white cover layer is not brought into contact with a press felt, at least in one nip, preferably in the last nip.
  • the white cover layer is thus brought into contact with an unfilled press roll or a smooth transfer belt.
  • the supine position is formed in a twin-wire former.
  • the supine position in Doppelsiebformer be deflected by a guide roller down, wherein the guide roller is wrapped by two wires of Doppelsiebformers. By looping the guide roller lifting or spinning the supine position of the lower wire is prevented.
  • the guide roller may also be sucked.
  • the multi-ply fibrous web consists of at least three layers, which are successively laped together, it is advantageous if the vacuum dewatering according to the invention takes place only directly after the last embedding.
  • the white cover layer and / or the backsheet can be applied to a forming fabric with the aid of a multi-layer casserole.
  • the white top layer is applied to the screen by means of a multi-layer casserole, the layer of the white top layer which ultimately forms the surface of the multi-ply fibrous web should have the greatest whiteness.
  • the forming section 2 is shown as a multilayer wire section with which a multilayer fibrous web 1 is formed.
  • the multilayer fibrous web 1 in this case consists of a white cover layer 1a and a backsheet 1b.
  • a pulp suspension is applied to the sieve 16 via the headbox 14 and dehydrated.
  • a pulp suspension is also applied to a wire 15 and drained from a headbox 15.
  • the formation of the supine position 1b is supported in the present example with a twin-wire former 10.
  • the backsheet 1b passes through the twin-wire former 10 embedded between the two wires 13 and 12.
  • the two wires 12, 13 and the backsheet 1b are deflected downwards via a deflection roller 11 and fed to the skin roller 17, which is vacuumed in the present example.
  • the Gautschwalze 17 vergautscht the backsheet 1b with the white top layer la and indeed so that the white cover layer la forms the bottom of the multilayer fibrous web 1.
  • a suction box 4 is arranged, through which a vacuum dewatering upwards. Dirty water from the supine 1b is thereby sucked off, without it can get into the white cover layer la.
  • the suction box 4 the upper wire 13 is lifted from the rubberized fibrous web 1, the separating sucker 18 prevents lifting of the fibrous web. 1
  • FIG. 2 now also shows the subsequent to the former section 2 press section 3.
  • the multi-ply fibrous web 1 is here fed to a first press nip 5 in free train. There, the multi-ply fibrous web 1 between two press rolls 8, which are each surrounded by a press felt 9, drained. In a further last press nip 7, the multilayer fibrous web between the two press rolls 8 and 19 is dewatered. In this case, only the upper pressure roller 8 is felted, so wrapped by a felt 9. The lower press roll 19 is a smooth untwisted roll. The white cover layer la comes here so only with the smooth surface of the press roller 19 in contact. Subsequently, we transferred the multi-layer fibrous web 1 in the drying section 20 and dried on the drying wire 25 by means of drying cylinders 21.
  • FIG. 3 another possible embodiment of the press section 3 is shown.
  • This is a TriNip press.
  • the multilayer fibrous web 1 is here transferred from the wire 16 of the former section 2 directly to the press felt 22 and dewatered in a first press nip 5.
  • the two press rollers 27 and 28 of the first press nip 5 are each surrounded by a press felt 22 and 23.
  • the pulp 1 is further dewatered in a second press nip 6.
  • This second press nip 6 is formed by the felted press roll 27 and the smooth central roll 30.
  • a third and last press nip 7 between the smooth central roll 30 and the press roll 29, which is wrapped by a press felt 24, the last pressing before the fibrous web 1 is transferred by means of a suction roll 26 to the dryer fabric 25 of the drying section 20.
  • the white top layer la comes in the last press nip 7 thus only with the smooth surface of the central roller 30 in contact.
  • FIG. 4 is one opposite the FIG. 3 modified TriNip press shown.
  • the central roller 31 is wrapped by a smooth transfer belt 32, on which the multi-layer fibrous web 1 is transferred to the last press nip 7 by means of a suction roller 26 to the dryer fabric 25 of the dryer section 20.
  • the white cover layer la in the last nip 7 comes only with a smooth pressing surface, namely with the smooth transfer belt 32 in contact.
  • FIG. 5 shows a further press configuration with two press nips 5 and 7.
  • the multilayer fibrous web 1 with the downwardly facing white cover layer la is transferred here from the screen 16 onto the press felt 33 and dewatered in the first press nip 5 between the two press rolls 8. Both rollers 8 are wrapped by a press felt 33 and 34, respectively. Following the first press nip 5, the fibrous web is transported further on the felt 34, transferred to the further press felt 35 and further dewatered in the last press nip 7 before the drying section 20.
  • the last press nip 7 is formed here by the two press rolls 8 and 19, the roll 8 being felted and the lower press roll 19 being un-felted. From the smooth surface of the press roller 19, the fibrous web 1 is then transferred by means of the suction roller 26 on the drying wire 25. The fibrous web 1 is continuously supported in this press section 3.

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  • Paper (AREA)

Claims (10)

  1. Procédé de fabrication d'un matelas de pâte multicouche (1) comportant une couche de surface blanche (la), éventuellement une ou plusieurs couches intermédiaires et une couche dorsale (1b), chacune des couches (1a, 1b) du matelas de pâte (1) étant formée dans une section de formeur (2) et couchées ensemble de manière à ce que la couche de surface blanche (la) forme la face inférieure du matelas de pâte multicouche (1), le matelas de pâte étant égoutté (1) après le couchage dans la partie de formeur (3), caractérisé en ce que l'égouttage à haut vide a lieu directement après le couchage.
  2. Procédé selon la revendication 1, caractérisé en ce qu'est fabriqué un matelas de pâte (1) de couverture spéciale blanche, de couverture kraft blanche, de kraft blanc, de doublure de plaque de plâtre, de carton blanc mixte, de carton d'emballage de liquide ou de boîte en carton pliante.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'égouttage par le vide est effectué à l'aide d'une caisse aspirante (4) disposée au-dessus du matelas de pâte (1).
  4. Procédé selon la revendication 1 ou 3, caractérisé en ce que la couche de surface blanche (la) n'entre pas en contact avec un feutre de presse (9, 24, 33, 34, 35) dans au moins une ligne de contact (5, 6, 7) dans la section de formeur, de préférence dans la dernière ligne de contact (7).
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la couche dorsale (1b) est formée dans un formeur à double toile (10).
  6. Procédé selon la revendication 5, caractérisé en ce que la couche dorsale (1b) est déviée vers le bas sur un rouleur déflecteur (11) dans le formeur à double toile (10), où les deux toiles (12, 13) du formeur à double toile (10) sont enroulées autour du rouleau déflecteur (11).
  7. Procédé selon la revendication 6, caractérisé en ce que le rouleau déflecteur (11) est un cylindre aspirant.
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que le matelas de pâte multicouche (1) est constitué d'au moins trois couches qui sont couchées ensemble consécutivement, l'égouttage à haut vide ayant lieu seulement directement après le dernier couchage.
  9. Procédé selon l'une des revendications 1 à 8, caractérisé en ce que la couche de surface blanche (la) ou la couche inférieure (1b) est formée à l'aide d'une caisse de tête multicouche (14, 15).
  10. Procédé selon l'une des revendications 1 à 9, caractérisé en ce que le couchage est effectué par le rouleau coucheur (17).
EP17200955.7A 2017-02-03 2017-11-10 Procédé de fabrication d'une bande fibreuse multicouche ayant une couche de surface blanche Active EP3358074B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA50087/2017A AT519242B1 (de) 2017-02-03 2017-02-03 Verfahren zur herstellung einer mehrlagigen faserstoffbahn mit weisser decklage

Publications (2)

Publication Number Publication Date
EP3358074A1 EP3358074A1 (fr) 2018-08-08
EP3358074B1 true EP3358074B1 (fr) 2019-05-29

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AT (1) AT519242B1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT526620A1 (de) * 2022-11-08 2024-05-15 Mondi Ag Verfahren zur Herstellung einer bedruckbaren Linerbahn für Verpackungen sowie bedruckbarer Liner für Verpackungen
AT526619A1 (de) * 2022-11-08 2024-05-15 Mondi Ag Verfahren zur Herstellung einer bedruckbaren Linerbahn für Verpackungen sowie bedruckbarer Liner für Verpackungen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE334259T1 (de) * 1999-12-15 2006-08-15 Metso Paper Inc Vorrichtung und verfahren zur herstellung von mehrlagigem papier oder karton
DE102010029617A1 (de) * 2010-06-02 2011-12-08 Voith Patent Gmbh Verfahren zur Herstellung einer gestrichenen, mehrlagigen Faserstoffbahn
US10745836B2 (en) * 2013-03-15 2020-08-18 Georgia-Pacific Nonwovens LLC Multistrata nonwoven material
DE102014210883A1 (de) * 2014-06-06 2015-06-11 Voith Patent Gmbh Einrichtung zum Herstellen einer Faserstoffbahn

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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Publication number Publication date
AT519242A4 (de) 2018-05-15
AT519242B1 (de) 2018-05-15
EP3358074A1 (fr) 2018-08-08

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