WO2004109010A1 - Procede de fabrication d'une bande multicouches - Google Patents

Procede de fabrication d'une bande multicouches Download PDF

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Publication number
WO2004109010A1
WO2004109010A1 PCT/FI2004/000333 FI2004000333W WO2004109010A1 WO 2004109010 A1 WO2004109010 A1 WO 2004109010A1 FI 2004000333 W FI2004000333 W FI 2004000333W WO 2004109010 A1 WO2004109010 A1 WO 2004109010A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
wire
wire water
mixer
water
Prior art date
Application number
PCT/FI2004/000333
Other languages
English (en)
Finnish (fi)
Inventor
Arto Välikangas
Original Assignee
Metso Paper, Inc.
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 Metso Paper, Inc. filed Critical Metso Paper, Inc.
Priority to AT0917704A priority Critical patent/AT502116A1/de
Priority to DE112004000903T priority patent/DE112004000903T5/de
Publication of WO2004109010A1 publication Critical patent/WO2004109010A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
    • 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
    • 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

Definitions

  • the invention relates to a method according to claim 1.
  • Manufacturing processes of a multilayer web are known from prior art, in which processes, in order to return wire waters, in connection with multilayer head boxes the wire water from a wire section is passed to that layer of the head box from where it originally came from.
  • European patent application 0 664 356 discloses a method and an apparatus for improving the quality of multilayer papers, in which arrangement the waters from the former are divided into parts so that the waters from the surface layers are supplied in the multilayer headbox onto surface layers and the waters from the middle layers are passed to the middle layer.
  • Finnish patent application 992670 discloses a method for the manufacture of a multilayer web and a multilayer former having two formers, at least the other headbox being a multilayer headbox, and the wire waters being collected from the former such that the waters from the surface layers are passed to the surface layers in the headbox and the waters from the middle layers are passed to the middle layer.
  • recycled fiber material recycled fiber contains other materials of various kinds, e.g. box treating agent, surface treating agent such as wax, bitumen and different dirt particles, etc. generated in the treatment of rubbers and adhesive tapes, which particles form stickies.
  • box treating agent e.g. wax, bitumen and different dirt particles, etc. generated in the treatment of rubbers and adhesive tapes, which particles form stickies.
  • a particular problem is that, when recycled fiber is used in the manufacture of paper/board pulp, without the expensive additional processes of the type described above, both the machine and the end product will be subjected to problems caused by detrimental materials coming from the raw materials.
  • problems are caused especially by dirt particles conveyed with the recycled fiber when passing the wire waters via short circulation to be used again.
  • different particles, stickies, e.g. waxes and bitumen originating from the recycled fiber raw material stick to machine parts. This means that the surface quality of the end product will not be what was desired, because flecks caused by the stickies and/or the machine parts damaged by them are formed in the
  • An object of the invention is thus to reduce the amount of energy used in the processing.
  • An object of the invention is to reduce the effects of the detrimental materials conveyed with recycled fibers in the paper or board machine and in the end product.
  • An object of the invention is to provide a solution in order to eliminate or at least minimize the above-described problems.
  • the wire water discharging from the forming of the middle layer is supplied to the surface layer, and the water discharging from the forming of the surface layer and containing stickies and other detrimental materials is passed to be used in the forming of the middle layer, and the water discharging from the forming of the back layer is returned to the back layer.
  • fresh water is supplied to the surface and the dirtier waters as well as the stickies and other detrimental materials are supplied to the back.
  • stickies and other detrimental materials conveyed with the water flows are passed to layers where they cause fewer problems.
  • the harmful effects of unwanted matter such as stickies and bitumen can be reduced e.g. on the surfaces of a fibrous web product.
  • This in turn makes it possible to decrease the amount of additional processes such as dispersing in the manufacture.
  • the process of the invention is devised and designed in a new way giving further new opportunities to optimize the process and the end product what comes, for example, to the filler used as the raw material of a desired layer.
  • An advantage achieved thus in the invention is the relocation of couplings performed in the process. Forming serves as part of the cleaning process and at the same time new functions are provided in the wire section.
  • Figure 1 schematically shows an embodiment of the invention.
  • FIG. 2 schematically shows an embodiment of the invention.
  • FIG. 3 schematically shows an embodiment of the invention.
  • a pulp tower containing middle-length fiber has the reference number 10, that containing short fiber the reference number 20 and that containing long fiber the reference number 30.
  • the pulp is pumped by means of a feed pump 11, 21, 31 to a machine chest 12, 22, 32.
  • the pulp is passed to a mixer 13, 23, 33.
  • Overflow of the screen 12, 22, 32 of the machine chest is passed back to the corresponding pulp tower 10, 20, 30.
  • the pulp that came from the pulp tower 10, 20, 30 via the screen 12, 22, 32 of the machine chest is diluted with wire water taken from a wire water pit 17, 27 37 into headbox consistency and passed further via a screen 14, 24, 34 to a head- box 15, 25, 35.
  • the pulp suspension is fed from the headboxes 15, 25, 35 to a wire section 16, 26, 36, where the web being formed is dewatered.
  • the web being formed in the wire section 16 is passed to be used as the back layer of the web being formed.
  • the web being formed in the wire section 26 is passed to be used as the middle layer of the web being formed and the web being formed in the wire section 36 is passed to be used as the surface layer of the web being formed.
  • the wire water removed from the web is passed from the wire section 16, 26, 36 to the respective wire water pit 17, 27 and 37.
  • the overflow of the wire water pit 17, 27, 37 is passed via a container 18, 28, 38 to the pulp tower 10, 20, 30 or to be discharged, and the wire water of the back layer from the wire water pit 17 is passed back to the mixer 13 leading to the headbox layer 15 of the back layer.
  • the wire water of the middle layer from the wire water tank 27 is passed to the mixer 33 leading to the surface layer.
  • the wire water is passed to the mixer 23 of the middle layer.
  • Figure 2 differs from that of Figure 1 in that from the wire water pit 17 of the back layer the wire water is passed to a channel leading to the mixer 23 of the middle layer. From the wire water pit 27 of the middle layer the wire water is passed to a channel leading to the mixer 33 of the surface layer, and from the wire water pit 37 of the surface layer the wire water is passed to a channel leading to the mixer 13 of the surface layer.
  • Figure 3 differs from the above-described embodiments in that from the wire water pit 27 of the middle layer the wire water is passed to the mixer 13 of the back layer. From the wire water pit 17 of the back layer the wire water is passed to the mixer 33 of the surface layer, and from the wire water pit 37 of the surface layer the wire water is passed to the mixer 23 of the middle layer as in the embodiment according to Figure 1.
  • the stickies are passed, at least partially, with the wire water to the desired layer, preferably to the middle layer, to the back layer, in necessary.
  • the stickies will thus not be conveyed to the surface layer and do not stick to machine parts or cause surface defects in the finished web.
  • the screened, fresh water is supplied to the surface, the dirtiest water to the middle and the semi-dirty water to the back layer.
  • the embodiments shown in Figures 1-3 relate to the manufacture of a three-layer web, but when manufacturing a two-layer web, for example, the surface layer is supplied with the fresh water and the back with the dirtier waters.

Landscapes

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

Abstract

La présente invention concerne un procédé de fabrication d'une bande de papier ou de carton multicouches contenant des fibres recyclées. Ledit procédé consiste à former la bande multicouches constituée d'au moins deux couches à compositions de pâte différentes et à diluer la pulpe lors de la formation de chaque couche avec de l'eau de toile pour obtenir la consistance de la caisse de papier, puis, à l'acheminer au moyen de ladite caisse jusqu'à une section de toile, la bande étant ensuite déshydratée. Enfin, ledit procédé consiste à joindre ces couches en vue de former une bande multicouches. Ce procédé comprend une étape de passage de l'eau de toile éliminée de la section de toile lors de la formation de chaque couche à utiliser dans la dilution d'une puple d'une autre couche à acheminer.
PCT/FI2004/000333 2003-06-05 2004-06-01 Procede de fabrication d'une bande multicouches WO2004109010A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT0917704A AT502116A1 (de) 2003-06-05 2004-06-01 Verfahren zur herstellung einer mehrschichtpapierbahn
DE112004000903T DE112004000903T5 (de) 2003-06-05 2004-06-01 Verfahren zur Herstellung einer Mehrschichtpapierbahn

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20030843A FI113974B (fi) 2003-06-05 2003-06-05 Menetelmä monikerrosrainan valmistuksessa
FI20030843 2003-06-05

Publications (1)

Publication Number Publication Date
WO2004109010A1 true WO2004109010A1 (fr) 2004-12-16

Family

ID=8566208

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2004/000333 WO2004109010A1 (fr) 2003-06-05 2004-06-01 Procede de fabrication d'une bande multicouches

Country Status (4)

Country Link
AT (1) AT502116A1 (fr)
DE (1) DE112004000903T5 (fr)
FI (1) FI113974B (fr)
WO (1) WO2004109010A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013139522A1 (fr) * 2012-03-22 2013-09-26 Voith Patent Gmbh Dispositif de réception de l'eau résiduelle
EP3088604A1 (fr) * 2015-04-28 2016-11-02 Valmet Technologies Oy Procédé et système pour le optimisation des propriétés d'une bande de fibres multicouche dans la fabrication de bandes de fibres

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4477313A (en) * 1981-12-03 1984-10-16 Aktiebolaget Karlstads Mekaniska Werkstad Method and apparatus for producing a multilayer paper web
US5639349A (en) * 1994-01-22 1997-06-17 Voith Sulzer Papiermaschinen Gmbh Method and device for quality improvement in multilayer and multiply papers
DE10060263A1 (de) * 1999-12-13 2001-08-30 Valmet Corp Verfahren und Einrichtung zur Herstellung einer mehrlagigen Bahn

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4477313A (en) * 1981-12-03 1984-10-16 Aktiebolaget Karlstads Mekaniska Werkstad Method and apparatus for producing a multilayer paper web
US5639349A (en) * 1994-01-22 1997-06-17 Voith Sulzer Papiermaschinen Gmbh Method and device for quality improvement in multilayer and multiply papers
DE10060263A1 (de) * 1999-12-13 2001-08-30 Valmet Corp Verfahren und Einrichtung zur Herstellung einer mehrlagigen Bahn

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013139522A1 (fr) * 2012-03-22 2013-09-26 Voith Patent Gmbh Dispositif de réception de l'eau résiduelle
EP3088604A1 (fr) * 2015-04-28 2016-11-02 Valmet Technologies Oy Procédé et système pour le optimisation des propriétés d'une bande de fibres multicouche dans la fabrication de bandes de fibres

Also Published As

Publication number Publication date
DE112004000903T5 (de) 2006-04-13
AT502116A1 (de) 2007-01-15
FI113974B (fi) 2004-07-15
FI20030843A0 (fi) 2003-06-05

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