EP1467021B1 - 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
EP1467021B1
EP1467021B1 EP04101461A EP04101461A EP1467021B1 EP 1467021 B1 EP1467021 B1 EP 1467021B1 EP 04101461 A EP04101461 A EP 04101461A EP 04101461 A EP04101461 A EP 04101461A EP 1467021 B1 EP1467021 B1 EP 1467021B1
Authority
EP
European Patent Office
Prior art keywords
nip
web
coating
board web
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
EP04101461A
Other languages
German (de)
English (en)
Other versions
EP1467021A1 (fr
Inventor
Rüdiger KURTZ
Stefan Seidenath
Hermann Dr. Solbach
Helmut Endler
Jörg Dr. Rheims
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 Kabel 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
Application filed by Voith Patent GmbH, Stora Enso Publication Paper GmbH and Co KG filed Critical Voith Patent GmbH
Publication of EP1467021A1 publication Critical patent/EP1467021A1/fr
Application granted granted Critical
Publication of EP1467021B1 publication Critical patent/EP1467021B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 guided by a wide nip and then provided with at least one coat order.
  • 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 fact that one adjusts the blanket of the board web before the nip by mass sizing in the constant part of the board machine so that it has a liquid absorption capacity COBB of a maximum of 35 g of water / m 2 in a period of 60 s on an area of 100 cm 2 , that one vorkalandriert the web in the nip and one applies behind the nip a line with an increased sizing of at least 8% based on the pigment mass fraction in the coating color dispersion.
  • the board web is recalendered in at least one nip between the nip and the first coating application.
  • the web is, so to speak, satin-intercalated between the wide nip and the applicator for the coating color. It is believed that the wide nip is mainly responsible for the microroughness and this improves, the more nip behind the broad nip but for the macro roughness, which is usually determined according to Bendtsen. Macro roughness may be more important than microroughness for both the ink receptivity and the ink receptivity. Reducing macroroughness before painting results in better printability.
  • the board web is pre-calendered in the extended nip to a maximum micro-roughness of 6 ⁇ m (PPS-S10).
  • PPS-S10 micro-roughness after the nip improves the printability.
  • 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 web then leaves the nip and the moisture can condense again, the moisture distribution has been made uniform.
  • 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, for example, in Sandas, Salminen, Eklund: Measurement of Water Retention Coating Coating, 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. In this case, practically only the macro roughness is improved in the soft nip. Although 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 tip so that the web has a relatively uniform thickness over 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 through a support shoe 10 is pressed 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 support shoe 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. Supporting 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 sheath shown, it is also easy to use a band that circulates over a plurality of deflection rollers. 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 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 the inside or from the 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 to achieve a volume-grading 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 web does not have to be too dry.
  • 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 compression is to be effected which results in 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. 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)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Claims (10)

  1. Procédé de traitement d'une bande de carton qui est guidée à travers un pinçage allongé et qui y est calandrée, puis est munie d'au moins une application d'enduit, caractérisé en ce que l'on ajuste le dessus de la bande de carton (2) avant le pinçage allongé (5) par enduction d'adhésif en masse dans la partie constante de la machine à carton, de telle sorte qu'il présente une capacité d'absorption des liquides selon COBB de 35 g d'eau par m2 au maximum en un temps de 60 s sur une surface de 100 cm2, et que l'on applique derrière le pinçage allongé un enduit d'adhésif accru d'au moins 8% par rapport à la proportion de masse pigmentée dans la dispersion d'encre d'enduction.
  2. Procédé selon la revendication 1, caractérisé en ce que la bande de carton est post-calandrée dans au moins un pinçage (15) entre le pinçage allongé (5) et la première application d'enduit (19).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la bande de carton est pré-calandrée dans le pinçage allongé (5) à une micro-rugosité de 6 µm maximum (PPS-S10).
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la bande de carton (2) est humidifiée avant le pinçage allongé (5).
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la bande de carton (2) est chauffée dans le pinçage allongé (5) à une température d'au moins 100°C.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'on applique une encre d'enduction ayant une masse totale d'au moins 15 g/m2.
  7. Procédé selon la revendication 6, caractérisé en ce que l'on utilise une encre d'enduction ayant une capacité de rétention d'eau d'au moins 50 s, en particulier de l'ordre de 50 à 80 s.
  8. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le pinçage (15) est réalisé sous forme de pinçage mou entre un rouleau dur et un rouleau mou présentant un revêtement élastique.
  9. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le pinçage est réalisé sous forme de pinçage dur entre deux rouleaux durs.
  10. Procédé selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le post-calandrage est effectué avec une charge linéaire de l'ordre de 10 à 30 N/mm.
EP04101461A 2003-04-11 2004-04-08 Procédé de traitement d'une bande de carton Expired - Lifetime EP1467021B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10316850 2003-04-11
DE10316850A DE10316850B8 (de) 2003-04-11 2003-04-11 Verfahren zum Behandeln einer Kartonbahn

Publications (2)

Publication Number Publication Date
EP1467021A1 EP1467021A1 (fr) 2004-10-13
EP1467021B1 true EP1467021B1 (fr) 2009-03-11

Family

ID=32864453

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04101461A Expired - Lifetime EP1467021B1 (fr) 2003-04-11 2004-04-08 Procédé de traitement d'une bande de carton

Country Status (3)

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EP (1) EP1467021B1 (fr)
AT (1) ATE425303T1 (fr)
DE (2) DE10316850B8 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10232550C5 (de) * 2002-07-18 2013-02-07 Voith Patent Gmbh Vorrichtung und Verfahren zum Imprägnieren einer Papier- oder Kartonbahn

Family Cites Families (3)

* 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
FI108241B (fi) * 2000-08-10 2001-12-14 Metso Paper Inc Menetelmä päällystetyn kuiturainan valmistamiseksi, parannettu paperi- tai kartonkikone ja päällystetty paperi tai kartonki
FI20011291A (fi) * 2001-06-18 2002-12-19 Metso Paper Inc Menetelmä ja paperikone päällystetyn paperin valmistamiseksi

Also Published As

Publication number Publication date
DE502004009111D1 (de) 2009-04-23
DE10316850B8 (de) 2005-06-30
DE10316850B3 (de) 2004-12-02
ATE425303T1 (de) 2009-03-15
EP1467021A1 (fr) 2004-10-13

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