EP0233058A2 - Verfahren und Einrichtung zur Herstellung von mehrschichtigem Karton - Google Patents

Verfahren und Einrichtung zur Herstellung von mehrschichtigem Karton Download PDF

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Publication number
EP0233058A2
EP0233058A2 EP87301007A EP87301007A EP0233058A2 EP 0233058 A2 EP0233058 A2 EP 0233058A2 EP 87301007 A EP87301007 A EP 87301007A EP 87301007 A EP87301007 A EP 87301007A EP 0233058 A2 EP0233058 A2 EP 0233058A2
Authority
EP
European Patent Office
Prior art keywords
wire
pulp
consistency
layers
stock
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.)
Granted
Application number
EP87301007A
Other languages
English (en)
French (fr)
Other versions
EP0233058B1 (de
EP0233058A3 (en
Inventor
Tapio Waris
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.)
Valmet Technologies Oy
Original Assignee
Ahlstrom Corp
Valmet Karhula 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 Ahlstrom Corp, Valmet Karhula Inc filed Critical Ahlstrom Corp
Priority to AT87301007T priority Critical patent/ATE69274T1/de
Publication of EP0233058A2 publication Critical patent/EP0233058A2/de
Publication of EP0233058A3 publication Critical patent/EP0233058A3/en
Application granted granted Critical
Publication of EP0233058B1 publication Critical patent/EP0233058B1/de
Expired legal-status Critical Current

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Classifications

    • 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 present invention relates to an improved method of manu­facturing multilayer board webs.
  • the core layer that gives sturdiness and rigidity to the board is often manufactured from pulps made of waste paper, whilst the surface layers or at least one surface layer is usually consist made from bleached pulp of better quality.
  • a very old method of manufacturing multilayer board involves manufacturing the layers with cylinder moulds.
  • the driving speed of cylinder moulds is, however, relatively slow and high stock consistencies cannot be used in them which thus involves large dewatering quantities.
  • a plurality of cylinder moulds are needed if the board is required to be very thick.
  • Multiwire fourdrinier machines can be driven at higher speeds than cylinder moulds and the sheet formation can be better control­led in them. Multiwire fourdrinier machines are most suitable when manufacturing thin board qualities. High investment and running costs, however, limit the use of these machines.
  • the main object of the present invention is to provide a method of manufacturing high grammage (500 - 700 g/m2) multi­layer board with simple means.
  • This is achieved by the method according to the present invention which is substantially characterized in that two superposed pulp layers are formed by consecutively disposed head boxes disposed dis­charging onto the same fourdrinier wire, the stock consistency in at least two of the head boxes being so high that the forming pulp layer reaches a slice channel of the head box or after the stock has been discharged from the head box slice the pulp layer has such a degree of felting that the fibres cannot significantly move on the wire in relation to one another, and that dewatering takes place in both pulp layers through the wire.
  • a web forming section of a board machine is illustrated in Fig. 1. and is a twin wire former comprising a first wire arrangement or first wire 1 having a main run which generally extends horizontally from a breast roll 2 to a forming roll 3 and a second wire arrangement or wire 4 which forms with the first wire a gap 5 that tapers towards the forming roll. After the forming roll 3 both wires run diagonally downwards and the second wire 4 is detached from the first wire. Under the horizontal section of the first wire 1 are disposed known (not shown), wire supporting dewatering devices such as vacuum boxes and foils which effect dewatering downwardly through the wire.
  • the stock forming the first outer ply of the board is fed onto the first wire 1 by a headbox 6 which is disposed at the breast roll 2 and operates at a normal consistency range of 0.1 to 1.2 %.
  • the layers forming the core of the multilayer board are produced by feeding stock onto the wire on top of the already formed web layer by two high consistency head boxes 7 and 8 disposed at a distance from each other in which the stock consistency is substantially higher than the normal head box consistency, e.g. 3 %.
  • a head box of this type is described in e.g. Finnish patent publication 56221.
  • the drainage of the pulp does not take place in the same way as at a normal head box consistency, but rather the web is formed in such a way that the fibres form a continuous network across the whole thickness of the web in the slice channel of the head box or immediately after it.
  • the web structure becomes felted and there is a relatively strong z-orientation of the fibres in the web.
  • the structure of a web formed at a normal consistency is on the contrary stratified.
  • the felted structure remains more open than the stratified structure which means that dewatering of such a web is easier than that of a web formed at a normal consistency which again makes it possible to drain water from the pulp layer formed by the head box 8 downwards through the pulp layer formed by the head box 7. Since the quantity of water to be drained from the pulp layers is considerably smaller than that to be drained from pulp layers formed at a normal consistency, both layers can be thick and a thick core can be produced by two head boxes. Due to the fibre orientation, the core also has a higher bulk than a core formed at a normal consistency.
  • the web formation of a multilayer board can be improved by treating the web by means of a dandy roll 9 disposed between the head boxes 7 and 8.
  • the second thin outer ply is supplied by a head box 10 which is disposed in front of the gap formed by the first and second wires 1 and 4 and which operates at a normal consistency range.
  • the web layers on the forming roll 3 are pressed between the wires 1 and 4 and due to the centrifugal force water is drained upwards through the wire 4. Subsequently the thus formed 4-ply web is guided by known methods to the press and dryer sections of a board manufacturing machine for further treatment.
  • the stock consistency in the high consistency head boxes 7 and 8 can be 1.5 - 6% or higher, preferably 2 - 4 %.
  • the grammage of the core layers formed at a high consistency can be 100 - 300 g/m2 or higher, preferably 150 - 250 g/m2.
  • a 4-ply board with a grammage of ca. 600 g/m2 can be manu­factured on a relatively short twin wire former.
  • the web forming section of a multilayer board machine shown in Fig. 2. comprises a twin wire former 11 combined with a fourdrinier wire section 12 disposed below it.
  • the first outer ply is formed by a head box 6 operating at a normal pulp consistency range and the core layers by two high consistency head boxes 7 and 8 in the twin wire former.
  • a head box 6 operating at a normal pulp consistency range
  • two high consistency head boxes 7 and 8 in the twin wire former.
  • water is drained downwardly through the wire and on the forming roll 3 upwardly through the second wire 4.
  • the second outer ply is formed by feeding stock from a head box 14 operating at a normal pulp consistency range onto the wire 13 of the fourdrinier wire section 12.
  • the web layers are bonded by pressing the layers formed in the twin wire former by means of a transfer roller 15 against the layer formed on the wire 13.
  • the web forming section of a board machine shown in Fig. 3. comprises a twin wire former 16, a fourdrinier former 17 and a fourdrinier wire section 18 disposed below them.
  • a thin underliner is formed by a head box 19 operating at a normal consistency range of the twin wire former and on top of this are formed intermediate layers by two high consistency head boxes 20 and 21.
  • the top layer is formed by the fourdrinier former 17 and the back layer by the fourdrinier wire section 18.
  • the webs are bonded on the wire 22 of the fourdrinier wire section.
  • fourdrinier wire throughout the specification and claims, relates to and is generally understood to mean an endless belt arrangement as is used in fourdrinier machines which is sometimes referred to as a "cloth” and which may, e.g., be made of a wire mesh (mesh of metal filaments) or of a plastics material mesh.

Landscapes

  • Paper (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Electroluminescent Light Sources (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Production Of Multi-Layered Print Wiring Board (AREA)
EP87301007A 1986-02-11 1987-02-05 Verfahren und Einrichtung zur Herstellung von mehrschichtigem Karton Expired EP0233058B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87301007T ATE69274T1 (de) 1986-02-11 1987-02-05 Verfahren und einrichtung zur herstellung von mehrschichtigem karton.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI860606A FI75383C (fi) 1986-02-11 1986-02-11 Foerfarande foer framstaellning av flerskiktskartong.
FI860606 1986-02-11

Publications (3)

Publication Number Publication Date
EP0233058A2 true EP0233058A2 (de) 1987-08-19
EP0233058A3 EP0233058A3 (en) 1989-01-18
EP0233058B1 EP0233058B1 (de) 1991-11-06

Family

ID=8522128

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87301007A Expired EP0233058B1 (de) 1986-02-11 1987-02-05 Verfahren und Einrichtung zur Herstellung von mehrschichtigem Karton

Country Status (5)

Country Link
EP (1) EP0233058B1 (de)
AT (1) ATE69274T1 (de)
DE (1) DE3774289D1 (de)
ES (1) ES2027688T3 (de)
FI (1) FI75383C (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3632425C1 (de) * 1986-09-24 1988-04-14 Krupp Gmbh Stromversorgungsvorrichtung fuer eine Drehstrom-Plasmabrennereinheit
EP0511186A1 (de) * 1991-04-23 1992-10-28 International Paper Company Verfahren zur Herstellung von mehrschichtigen Papier- und Kartonprodukten mit verbesserter Steifigkeit
US6540873B2 (en) 1999-09-06 2003-04-01 Metso Paper Karlstad Ab Board machine and method of manufacturing a multilayer cardboard web
DE10223398A1 (de) * 2002-05-25 2003-12-04 Voith Paper Patent Gmbh Blattbildungsvorrichtung
US6699361B1 (en) 1999-09-07 2004-03-02 Metso Paper Karlstad Ab Papermaking device for producing a multilayer liner and associated methods

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5935382A (en) * 1996-05-31 1999-08-10 Valmet-Karlstad Ab Method and board machine for manufacturing a paperboard web

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2286942A (en) * 1939-07-11 1942-06-16 Int Paper Co Method of manufacturing paper and/or board
DE1136198B (de) * 1962-09-06 Saint Anne S Board Mill Compan Vorrichtung zum Herstellen einer mehrschichtigen Papier-, Karton- od. dgl. Faserstoffbahn
DE2310445A1 (de) * 1972-02-29 1973-09-20 Mitsubishi Heavy Ind Ltd Maschine zur herstellung mehrlagenpapier
US4021295A (en) * 1975-05-05 1977-05-03 Beloit Corporation Method and apparatus for supplying white water from a single silo in the formation of a multi-ply web
GB2041030A (en) * 1979-02-02 1980-09-03 St Annes Board Mill Co Ltd Compound Paper
EP0109282A2 (de) * 1982-11-16 1984-05-23 Whatman Reeve Angel Plc Papier und Verfahren zu dessen Herstellung
WO1985005387A1 (en) * 1984-05-11 1985-12-05 A. Ahlström Corporation Method for manufacturing multilayer board

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1136198B (de) * 1962-09-06 Saint Anne S Board Mill Compan Vorrichtung zum Herstellen einer mehrschichtigen Papier-, Karton- od. dgl. Faserstoffbahn
US2286942A (en) * 1939-07-11 1942-06-16 Int Paper Co Method of manufacturing paper and/or board
DE2310445A1 (de) * 1972-02-29 1973-09-20 Mitsubishi Heavy Ind Ltd Maschine zur herstellung mehrlagenpapier
US4021295A (en) * 1975-05-05 1977-05-03 Beloit Corporation Method and apparatus for supplying white water from a single silo in the formation of a multi-ply web
GB2041030A (en) * 1979-02-02 1980-09-03 St Annes Board Mill Co Ltd Compound Paper
EP0109282A2 (de) * 1982-11-16 1984-05-23 Whatman Reeve Angel Plc Papier und Verfahren zu dessen Herstellung
WO1985005387A1 (en) * 1984-05-11 1985-12-05 A. Ahlström Corporation Method for manufacturing multilayer board

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3632425C1 (de) * 1986-09-24 1988-04-14 Krupp Gmbh Stromversorgungsvorrichtung fuer eine Drehstrom-Plasmabrennereinheit
EP0511186A1 (de) * 1991-04-23 1992-10-28 International Paper Company Verfahren zur Herstellung von mehrschichtigen Papier- und Kartonprodukten mit verbesserter Steifigkeit
US6540873B2 (en) 1999-09-06 2003-04-01 Metso Paper Karlstad Ab Board machine and method of manufacturing a multilayer cardboard web
US6699361B1 (en) 1999-09-07 2004-03-02 Metso Paper Karlstad Ab Papermaking device for producing a multilayer liner and associated methods
DE10223398A1 (de) * 2002-05-25 2003-12-04 Voith Paper Patent Gmbh Blattbildungsvorrichtung

Also Published As

Publication number Publication date
ATE69274T1 (de) 1991-11-15
FI75383C (fi) 1988-06-09
FI860606A (fi) 1987-08-12
DE3774289D1 (de) 1991-12-12
FI860606A0 (fi) 1986-02-11
EP0233058B1 (de) 1991-11-06
ES2027688T3 (es) 1992-06-16
EP0233058A3 (en) 1989-01-18
FI75383B (fi) 1988-02-29

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