EP1467020B1 - Procédé de traitement d'une bande de carton - Google Patents

Procédé de traitement d'une bande de carton Download PDF

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Publication number
EP1467020B1
EP1467020B1 EP04101459A EP04101459A EP1467020B1 EP 1467020 B1 EP1467020 B1 EP 1467020B1 EP 04101459 A EP04101459 A EP 04101459A EP 04101459 A EP04101459 A EP 04101459A EP 1467020 B1 EP1467020 B1 EP 1467020B1
Authority
EP
European Patent Office
Prior art keywords
web
nip
carton
coating
board
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.)
Expired - Lifetime
Application number
EP04101459A
Other languages
German (de)
English (en)
Other versions
EP1467020A1 (fr
Inventor
Rüdiger Dr. Kurtz
Jörg Dr. Rheims
Helmut Endler
Hermann Dr. Solbach
Stefan Seidenath
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
Stora Enso Publication Paper GmbH and Co KG
Original Assignee
Voith Patent GmbH
Stora Enso Publication Paper GmbH and Co KG
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=32864454&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1467020(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Voith Patent GmbH, Stora Enso Publication Paper GmbH and Co KG filed Critical Voith Patent GmbH
Publication of EP1467020A1 publication Critical patent/EP1467020A1/fr
Application granted granted Critical
Publication of EP1467020B1 publication Critical patent/EP1467020B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/006—Calenders; Smoothing apparatus with extended nips
    • 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
    • D21H23/30—Pretreatment of the paper
    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod
    • D21H25/14—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod the body being a casting drum, a heated roll or a calender

Definitions

  • the invention relates to a method for treating a board web, which is passed through a wide nip and then provided with at least one coating order, wherein the web is pre-calendered in the nip to a maximum micro-roughness of 6 microns (PPS-S10).
  • WO 02/103109 A1 there is disclosed a method of making a once-coated printing paper web.
  • the web is made in a paper machine, passed through a dryer section and then satined in a pre-calender.
  • the pre-calender can be designed as a two-nip calender with two wide nips, so that both sides of the web can be treated with a heating roller. Pre-calendering gives the web micro-roughness of less than 6 ⁇ m.
  • the web is passed through a coater. D1 can not be deduced to recalender the web after the precalendering in the nip and before the first coat application in at least one nip formed between two rolls.
  • WO 01/98585 A1 discloses a method for calendering a paper web, wherein the paper web first is precalendered and then provided with a stroke order.
  • two calender units are provided, each with a heatable roller and a soft roller.
  • the two calender units are arranged one behind the other in such a way that both sides of the web can be treated with the heating roller.
  • the treatment of a board web in a nip before applying a line is intended to improve the printability of the web.
  • the board web is often smoothed at relatively high volume, at high temperatures above the T G (glass transition temperature).
  • T G glass transition temperature
  • the invention has for its object to improve the printability of the web.
  • the object is achieved in a method of the type mentioned above in that the web is nachkalandriert between the nip and the first coating order in at least one nip formed between a hard roller and an elastic pad having soft roller or between two hard rollers ,
  • the board web is moistened in front of the broad nip.
  • the moistening can be effected by means known per se, for example a steam humidifier, a nozzle moistener or the like. Moistening should be as close as possible to the wide nip.
  • the board web is heated in the nip to a temperature of at least 100 ° C.
  • This side can also be heated more strongly, for example to at least 200 ° C.
  • the advantageous result is obtained that the moisture in vapor form can uniformly spread in the web due to the broad nip as a closed system. The steam will be evenly distributed so that everywhere the same pressure prevails. If the train then leaves the nip and the moisture can condense again, the moisture distribution has been made uniform.
  • the blanket of the paperboard web is adjusted by bulk sizing in front of the nip so that it has a COBB liquid absorption capacity of a maximum of 50 g of water / m 2 over a period of 60 s over a surface area of 100 cm 2 .
  • the area of 100 cm 2 usually has a circular shape when measured according to COBB according to EN 20535. If you glue the ceiling of the board so that it has the said liquid absorbency, then creates favorable conditions in the order of the stroke. The stroke remains on the surface and can form there very evenly.
  • the glue is added before the headbox, so relatively early, as so-called mass sizing in the liquid state of the fiber suspension. Due to the long residence time, the glue can be applied to the fiber material and spread sufficiently in the cardboard layer. It is preferable to apply a coating color having a total mass of at least 15 g / m 2 . This later improves the printability. In the case of a multiple stroke, this information applies to the sum of all layers, that is the overall line.
  • a coating color having a water retention capacity of at least 50 s, in particular in the range of 50 to 80 s is used.
  • This water retention capacity is measured according to the subscription test method, defined eg in Sandas, Salminen, Eklund: Measurement of water retention coating colors, 1989 TAPPI Coating Conference, Proceedings 37-41.
  • Such a coating contains binders and pigments. It is particularly well suited for folding boxboard, which should be printed over the entire surface.
  • the nip is formed as a soft nip between a hard roll and an elastic pad having a soft roll.
  • practically only the macro roughness is improved in the soft nip.
  • only one-sided smoothing takes place here. But this is sufficient in many cases, especially in carton box, which should be printed on one side anyway.
  • the back can be relatively rough.
  • the nip is formed as a hard nip between two hard rolls. In this case, the smoothness on both sides of the web is improved.
  • the hard nip can be used as a calibration nip so that the web has a relatively uniform thickness across its width.
  • the recalendering is carried out with a line load in the range of 10 to 30 N / mm.
  • the line load is thus optimized so that the volume loss remains small, but the desired smoothness can be achieved.
  • the figure shows a device 1 for treating a board web 2, which will also be referred to as "web" for short.
  • a blanket of the board web is produced and provided with glue by a glue metering station 4 which is arranged in the constant part of the board machine in front of the headbox.
  • the sizing of the blanket eg with a resin dispersion, is adjusted so that the blanket has a liquid absorbency, which is determined by COBB and a maximum of 50 g water / m 2 in a time of 60 s on a circular area of 100 cm 2 having.
  • the thus treated web 2 is passed after the predrying through a nip 5, which is formed between a hard roller 6 with a smooth surface 7 and a circumferential jacket 8 of a shoe roll 9.
  • the jacket 8 is pressed by a support shoe 10 against the roller 6.
  • the support shoe 10 has a pressure surface 11, which may be provided in a manner not shown with means for lubricating the contact surface between the jacket 8 and the Stutzschuh 10, for example, a hydrostatic lubrication.
  • the shoe roll 9 is formed with a relatively stable shell 8, which rotates in the manner of a roller. Support elements that support the jacket 8 during circulation, are not shown in detail.
  • the broad nip 5 may also be formed in other ways. Instead of the illustrated Mantels can also be used simply a band that rotates over several pulleys. Instead of the roller 6, it is also possible to use another counterpressure element, for example a further strip which is supported by a pressure shoe.
  • the roller 6 may have heating channels 12, through which a heat transfer medium, such as steam or hot oil, can be passed to heat the web 2 in the extended nip 5 on the later coated and printed side to a temperature of at least 100 ° C.
  • a heat transfer medium such as steam or hot oil
  • other heating devices may also be provided instead of the heating channels, for example a heating device 13 which acts inductively on the surface 7 of the roller 6 from inside or from outside.
  • a moistening device 14 is arranged, for example a steam humidifier, a nozzle moistener or the like.
  • a layer near the surface should be penetrated by the water, in order to effect a volume-gentle smoothing (moisture gradient calendering).
  • micro-smoothness is determined according to PPS-S10.
  • the moistening device applies an application amount of, for example, 1 to 5 g / m 2 to the web 2.
  • the originating from the predrying of the board machine 3 The track does not have to be too dry yet.
  • the moistening device 14 Before the moisture application by the moistening device 14, for example, it can have a maximum web moisture content of 14%.
  • the web 2 After passing through the broad nip 5, the web 2 is guided by a further nip 15, which is formed in the present embodiment as a soft nip.
  • the soft nip 15 is formed between a hard roller 16 and a soft roller 17 having an elastic surface covering 18.
  • nip may also be provided a hard nip, in which the nip is formed by two hard rollers.
  • the compressive stresses in the nip 5 and nip 15 should be selected according to the following criteria. On the one hand, you want to achieve a volume-smoothing. On the other hand, the necessary compaction is to be effected, which results in an improved printability. In the broad nip 5, the compressive stresses are set to a maximum of 3 N / mm 2 .
  • the nip 15 should have a maximum line load of 60 N / mm, preferably only a maximum of 20 to 30 N / mm.
  • the web 2 After passing through the nip 15, the web 2 is fed to one or more coating applicators 19 (only one shown), in which the web 2 is guided, for example, by an applicator nip 20 between two applicator rollers 21, 22.
  • Each applicator roll 21, 22 is provided with an applicator 23, 24 which applies a coating color to the surface of the applicator rolls 21, 22 applies. If then the web 2 passes through theinstantnip 20, this coating color is transferred to the web 2.
  • One or more top and / or backsheet jobs are possible.
  • the coating color is applied with a mass of at least 15 g / m 2 .
  • the water retention capacity of the coating should be at least 75 s.
  • the coating color may contain binders and pigments.
  • Such a treated board web 2 is particularly well suited for offset printing.

Landscapes

  • Paper (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Claims (8)

  1. Procédé de traitement d'une bande de carton, qui est menée à travers une emprise large et est ensuite pourvue d'au moins un dépôt d'enduction, dans lequel la bande est pré-calandrée dans l'emprise large (5) à une micro-rugosité de 6 µm au maximum (PPS-S10), caractérisé en ce que la bande est post-calandrée, entre l'emprise large (5) et le premier dépôt d'enduction (19), dans au moins une emprise (15) qui est formée entre un cylindre dur (16) et un cylindre souple (17) présentant un revêtement élastique (18) ou entre deux cylindres durs.
  2. Procédé selon la revendication 1, caractérisé en ce que la bande de carton (2) est humidifiée avant l'emprise large (5).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la bande de carton (2) est chauffée à une température d'au moins 100°C dans l'emprise large (5).
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'on règle la couverture de la bande de carton (2) avant l'emprise large (5) par collage en pile, de telle manière qu'elle présente au maximum un pouvoir d'absorption de liquide selon COBB de 50 g d'eau/m2 en un temps de 60 s sur une surface de 100 cm2.
  5. Procédé selon la revendication 4, caractérisé en ce que l'on opère le collage dans la partie constante de la machine à carton.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'on dépose une encre de couchage avec une masse totale d'au moins 15 g/m2.
  7. Procédé selon la revendication 6, caractérisé en ce que l'on utilise une encre de couchage présentant un pouvoir de rétention d'eau d'au moins 50 s, en particulier compris dans la plage de 50 à 80 s.
  8. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'on opère le postcalandrage avec une charge linéaire de l'ordre de 10 à 30 N/mm.
EP04101459A 2003-04-11 2004-04-08 Procédé de traitement d'une bande de carton Expired - Lifetime EP1467020B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10316851A DE10316851B4 (de) 2003-04-11 2003-04-11 Verfahren zum Behandeln einer Kartonbahn
DE10316851 2003-04-11

Publications (2)

Publication Number Publication Date
EP1467020A1 EP1467020A1 (fr) 2004-10-13
EP1467020B1 true EP1467020B1 (fr) 2011-01-19

Family

ID=32864454

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04101459A Expired - Lifetime EP1467020B1 (fr) 2003-04-11 2004-04-08 Procédé de traitement d'une bande de carton

Country Status (3)

Country Link
EP (1) EP1467020B1 (fr)
AT (1) ATE496170T1 (fr)
DE (2) DE10316851B4 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI115543B (fi) * 2000-06-20 2005-05-31 Metso Paper Inc Esikalanterointimenetelmä, jälkikäsittelymenetelmä ja laitteisto menetelmien toteuttamiseksi
FI115405B (fi) 2000-06-20 2005-04-29 Metso Paper Inc Kalanterointimenetelmä erityisesti esikalanterointia varten ja paperin käsittelylinja
FI20011291A (fi) * 2001-06-18 2002-12-19 Metso Paper Inc Menetelmä ja paperikone päällystetyn paperin valmistamiseksi
FI111281B (fi) * 2001-12-12 2003-06-30 Metso Paper Inc Menetelmä kartongin jälkikäsittelemiseksi

Also Published As

Publication number Publication date
DE10316851B4 (de) 2007-02-08
EP1467020A1 (fr) 2004-10-13
ATE496170T1 (de) 2011-02-15
DE502004012118D1 (de) 2011-03-03
DE10316851A1 (de) 2005-01-05

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