EP1876294A2 - Procédé destiné au traitement d'une bande de papier brut ou de carton brut - Google Patents

Procédé destiné au traitement d'une bande de papier brut ou de carton brut Download PDF

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Publication number
EP1876294A2
EP1876294A2 EP07107659A EP07107659A EP1876294A2 EP 1876294 A2 EP1876294 A2 EP 1876294A2 EP 07107659 A EP07107659 A EP 07107659A EP 07107659 A EP07107659 A EP 07107659A EP 1876294 A2 EP1876294 A2 EP 1876294A2
Authority
EP
European Patent Office
Prior art keywords
web
moisture
paper
drying
coating
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
EP07107659A
Other languages
German (de)
English (en)
Other versions
EP1876294B1 (fr
EP1876294A3 (fr
Inventor
Ulrich Rothfuss
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
Original Assignee
Voith Patent GmbH
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 filed Critical Voith Patent GmbH
Publication of EP1876294A2 publication Critical patent/EP1876294A2/fr
Publication of EP1876294A3 publication Critical patent/EP1876294A3/fr
Application granted granted Critical
Publication of EP1876294B1 publication Critical patent/EP1876294B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
    • D21H23/34—Knife or blade type coaters
    • 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
    • D21H23/24—Addition to the formed paper during paper manufacture
    • D21H23/26—Addition to the formed paper during paper manufacture by selecting point of addition or moisture content 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
    • 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

Definitions

  • the invention relates to a method for processing a sheet of raw paper or cardboard, in which the web is coated on-line following a paper or board machine on a built-coat machine and the coated web is dried and calendered.
  • the on-line processing of paper and cardboard has meanwhile been introduced many times. It has the advantage that the web no longer needs to be rolled up and down between individual processing steps. In addition, the speed of the web at the individual processing steps follows the speed of the paper or board machine so as to obtain high productivity.
  • the on-line brushing is carried out so far as a so-called "film coating" in which a dried on 2 to 3% moisture content coating base paper in a film coater painted on both sides, after-dried and satined. Due to the high calendering temperatures required for on-line calendering, the web also experiences high moisture losses. Since you want to get a final moisture after the calendering of 4.5 to 5.5%, you need to moisten the web before satining on up to 10%, which is usually no problem for film-coated papers, because the film-coated web must be dried only moderately after applying the line.
  • moisture loss could be reduced by decreasing the calendering temperatures or the number of nips. However, this is always accompanied by a loss of quality, i. one obtains lower gloss and smoothness values.
  • the invention has for its object to improve the quality of the web.
  • This object is achieved in a method of the type mentioned above by providing the web with a blade stroke and adjusts a moisture of at least 4% before brushing.
  • Blade-coated papers are also lighter and easier to calender due to better smoothness. Consequently, an on-line installation with blade-coated papers can also enable the production of gravure-capable papers, which requires significantly better smoothing due to the printing process.
  • the base paper or the raw board By setting the base paper or the raw board to a higher humidity, namely at least 4%, the web takes, so to speak, a moisture reserve when it is painted. This moisture supply is at least largely maintained even when drying the line, because the drying acts predominantly on the line.
  • the aim of the drying is to cure the binder in the line so far that the line does not stick to subsequent guide rolls, calender rolls, drying cylinders or the like.
  • the moisture contained in the raw paper or Rohkartonbahn not or only slightly reduced.
  • the higher humidity is required for the calendering.
  • the web After calendering in a multi-roll calender with the corresponding large number of nips, the web will still have a humidity in the range of 4.5 to 5.5%, even though this will be moisture over the cross section of the web at the end of the calendering does not have to be evenly distributed. Before the train then comes to print, thereby the moisture has been compensated.
  • the web is dried to at least 4% moisture before painting. This means that you can either operate the dryer section of the paper or board machine with less energy or even save some drying cylinders, as the base paper or the raw board no longer has to be dried out so much. This makes the whole paper machine shorter and thus cheaper.
  • the web is smoothed prior to brushing at the humidity of at least 4%.
  • the web is passed through a calender before painting to produce a uniform thickness. If you use a higher humidity, smoothing can be done much easier. If the web is painted with a better smoothness, this results in a better quality after painting and satining.
  • the moisture of the web before painting is adjusted so that the web has a higher moisture content after drying the coating than the coating on its outside.
  • after-wiping after painting has the main task of consolidating the coating to such an extent that it no longer hangs on downstream aggregates. What moisture the actual web, so the carrier medium for the line, it has, is of subordinate Importance. It is therefore possible with the help of the web to enter a certain amount of moisture in the further processing, so that you get the desired final moisture content of about 5% after the calendering.
  • the moisture of the web before painting is adjusted so that the moisture of the web after the drying of the coating is higher than the moisture of the coating layer.
  • the moisture of the web is thus adapted to the drying process so that the drying process mainly acts on the coating layer. Although a certain amount of moisture compensation will result from the web into the coating layer. Nevertheless, enough moisture is retained in the actual web, so that the web has the desired final moisture after the calendering.
  • a paper machine 1 with a press section 2 and a dryer section 3 generates at the exit of the dryer section 3 a base paper web 4, which is to be further processed so that it meets certain quality requirements.
  • the base paper web 4 is passed through a blade coater 5, in which it is provided in a conventional manner with a blade stroke.
  • a line is applied to one or both sides of the base paper web 4, which contains certain pigments and a binder.
  • the coated web 6 is passed through a multi-roll calender 9, which has 8 rolls 10 in the present case.
  • a multi-roll calender 9 which has 8 rolls 10 in the present case.
  • the use of 2 roll stacks with 5 or more rolls is also possible.
  • the web 6 is wound up in a winding station 11.
  • the web 6 loses moisture.
  • the web 6 must pass through the calender 9 at the speed with which the paper machine 1 produces the paper. Accordingly, to achieve predetermined surface properties of the web 6, one must operate the on-line calender 9 at higher temperatures so that the web 6 suffers a significant moisture loss in the calender. This loss can be up to 4% points.
  • the web in the winding station 11 has a moisture content of the order of 4.5 to 5.5%.
  • the moisture content of the base paper web 4 is set to a higher value than before. So far, this humidity has been set very low. It was in the range 2 to 3%. Now, the humidity of the base paper web 4 is set to at least 4%. This has several advantages. On the one hand you can equip the dryer section 3 with less drying cylinders or operate the drying cylinder with reduced energy. Both lead to a more economical behavior. On the other hand, the raw paper web can now be better smoothed by a calender 12, i. the base paper web 4 has already when entering the coating device 5 a smoother surface than before.
  • the specified method makes it possible to produce high-quality, gravure-capable blade-coated papers also on-line, despite high calendering temperatures and Nipnac necessary to produce the best qualities, the final moisture content of the treated paper web not below the desired and required level of about 5%, without the risk of line deposits on Textilleitschn or drying cylinders.
  • the process works relatively economically because of drying the base paper webs 4 required energy can be reduced.

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  • Paper (AREA)
EP07107659A 2006-07-05 2007-05-08 Procédé destiné au traitement d'une bande de papier brut ou de carton brut Expired - Fee Related EP1876294B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006031403A DE102006031403A1 (de) 2006-07-05 2006-07-05 Verfahren zum Bearbeiten einer Bahn aus Rohpapier oder Rohkarton

Publications (3)

Publication Number Publication Date
EP1876294A2 true EP1876294A2 (fr) 2008-01-09
EP1876294A3 EP1876294A3 (fr) 2010-01-27
EP1876294B1 EP1876294B1 (fr) 2012-02-08

Family

ID=38606497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07107659A Expired - Fee Related EP1876294B1 (fr) 2006-07-05 2007-05-08 Procédé destiné au traitement d'une bande de papier brut ou de carton brut

Country Status (3)

Country Link
EP (1) EP1876294B1 (fr)
AT (1) ATE544908T1 (fr)
DE (1) DE102006031403A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5536535A (en) * 1994-03-09 1996-07-16 Nippon Paper Industries Co., Ltd. Process for producing a coated paper
WO1996028609A1 (fr) * 1995-03-16 1996-09-19 Korsnäs Ab Articles en carton portant un revetement, pour des articles formes
EP0773104A1 (fr) * 1995-11-13 1997-05-14 Voith Sulzer Finishing GmbH Procédé pour l'ennoblissement et l'impression d'une bande et machine d'impression pour la mise en oeuvre de ce procédé
EP1433899A2 (fr) * 2002-11-28 2004-06-30 Voith Paper Patent GmbH Procédé et appareil pour le traitement d'une feuille de papier ou carton
EP1614803A1 (fr) * 2003-03-31 2006-01-11 Nippon Paper Industries Co., Ltd. Procede permettant de produire un papier couche a haut brillant et son appareil de fabrication
EP2020458A1 (fr) * 2006-05-02 2009-02-04 Daio Paper Corporation Procédé de fabrication de papier emaillé

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5536535A (en) * 1994-03-09 1996-07-16 Nippon Paper Industries Co., Ltd. Process for producing a coated paper
WO1996028609A1 (fr) * 1995-03-16 1996-09-19 Korsnäs Ab Articles en carton portant un revetement, pour des articles formes
EP0773104A1 (fr) * 1995-11-13 1997-05-14 Voith Sulzer Finishing GmbH Procédé pour l'ennoblissement et l'impression d'une bande et machine d'impression pour la mise en oeuvre de ce procédé
EP1433899A2 (fr) * 2002-11-28 2004-06-30 Voith Paper Patent GmbH Procédé et appareil pour le traitement d'une feuille de papier ou carton
EP1614803A1 (fr) * 2003-03-31 2006-01-11 Nippon Paper Industries Co., Ltd. Procede permettant de produire un papier couche a haut brillant et son appareil de fabrication
EP2020458A1 (fr) * 2006-05-02 2009-02-04 Daio Paper Corporation Procédé de fabrication de papier emaillé

Also Published As

Publication number Publication date
EP1876294B1 (fr) 2012-02-08
DE102006031403A1 (de) 2008-01-10
ATE544908T1 (de) 2012-02-15
EP1876294A3 (fr) 2010-01-27

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