EP1964972A2 - Procédé de fabrication d'une bande de matière fibreuse revêtue, en particulier de papier ou de carton - Google Patents

Procédé de fabrication d'une bande de matière fibreuse revêtue, en particulier de papier ou de carton Download PDF

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Publication number
EP1964972A2
EP1964972A2 EP07150129A EP07150129A EP1964972A2 EP 1964972 A2 EP1964972 A2 EP 1964972A2 EP 07150129 A EP07150129 A EP 07150129A EP 07150129 A EP07150129 A EP 07150129A EP 1964972 A2 EP1964972 A2 EP 1964972A2
Authority
EP
European Patent Office
Prior art keywords
web
fibrous web
coating
application
application layer
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
EP07150129A
Other languages
German (de)
English (en)
Other versions
EP1964972A3 (fr
EP1964972B1 (fr
Inventor
Andrew William Holden
John Bergman
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
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Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1964972A2 publication Critical patent/EP1964972A2/fr
Publication of EP1964972A3 publication Critical patent/EP1964972A3/fr
Application granted granted Critical
Publication of EP1964972B1 publication Critical patent/EP1964972B1/fr
Not-in-force legal-status Critical Current
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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
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/04—Physical treatment, e.g. heating, irradiating

Definitions

  • the invention relates to a process for producing a coated fibrous web, in particular of paper or board, comprising the following steps: web formation from a pulp mixture with a headbox and a wire section, dewatering in a press section, predrying in order to dry the formed fibrous web at least to a residual moisture content , Coating both sides of the fibrous web, post-drying and reeling of the fibrous web.
  • the object of the invention is therefore to provide an on-line method and a machine for producing a coated fibrous web, which ensures good runnability of the production machine and high quality of a high-strength, preferably wood-free coated fibrous web.
  • the object of the invention is achieved by a method according to the characterizing part of claim 1.
  • the process is carried out by applying a first application layer and a second application layer per web side simultaneously and indirectly in an on-line process on both sides of the web, with glue or starch for the first application layer and pigment-containing for the second application layer Coating is used and between two jobs an intermediate drying and an intermediate smoothing takes place, after the application of the second coating layer, a further intermediate drying takes place and then applied to at least one web page a last coating layer with a known blade applicator.
  • the inventors have recognized that at least the last coating of a multiple layer on at least one web side is a so-called blade, i. Blade stroke should be. This increases the quality of the surface, which is characterized by improved flatness of the application layer. In the end, this will improve the printability on this web page.
  • the inventors have also recognized that the first application layer in the form of glue or starch brings great benefits. Glue or starch can penetrate well into the web and consolidate the entire cross section of the web. Since then an intermediate smoothing with at least one hard or Softnipglätt remedies is made, one reaches a leveling of the web surface, which is thus optimally prepared for the subsequent application with pigment-containing coating color.
  • This subsequent order consists, as already described, in the simultaneous film order on both sides of the web and on at least one desired web page in the so-called blade or blade stroke.
  • Good runnability is especially important because the process or manufacturing process should take place online.
  • the Bladecoater (blade or doctor applicators) used in previous methods often caused web breaks. These breaks are undesirable especially in online processes, because at not only the production in the finishing section fails, but also the paper machine at the same time.
  • the good runnability therefore makes it possible for the method to be particularly suitable for high speeds, such as greater than 1200 m / min, in particular greater than 1500 m / min, preferably greater than 1800 m / min, whereby a higher production yield is achieved.
  • the object of the invention is also achieved with a device for producing the coated fibrous web.
  • a film applicator for a first application layer and a second film applicator for a second application layer per web page, as well as a blade applicator for a last application layer on at least one web page is provided according to the characterizing part of claim 8 within the online manufacturing machine.
  • an intermediate drying device and an intermediate smoothing device is provided between both film applicators.
  • the film coating applicator is otherwise equipped with an applicator roll assigned to the web side to be coated.
  • This application roller is in turn associated with an application unit, for example a nozzle unit, which delivers the application medium to the application roller and from which the application medium is transferred to the web side of the fibrous web to be coated.
  • This coating process is referred to as indirect application.
  • applicator rollers which have a diameter of more than 1300 mm.
  • the fresh coating layer on the applicator roll is not subject to such high centrifugal forces, in contrast to how they would occur with smaller diameters and therefore would lead to the spray of the application medium.
  • the application rollers even when using smaller diameter of the applicator rolls, as hard as possible pads should be used.
  • the hardness of the rubbers which are made of rubber in particular, makes at least 50 P & Js (according to Pussey and Jones) useful. This also improves the coating quality.
  • the device according to the invention embodies a very compact design, which can also be converted very advantageously according to the requirements.
  • the conversion costs are lower, on the other hand, a conversion within already existing pulp-making machines (for example paper machines) becomes possible in the first place because of the compact design and easy-to-carry alternative operating modes.
  • impingement drying with hot air makes sense. From the former of the manufacturing machine, preferably from Gapformer to the impingement drying, it is also very useful if the web runs fully supported on support bands.
  • inventive method and the inventive apparatus are particularly suitable for the production of a high strength, in particular wood-free (WFC w ood f ree c oated) web (B) as set forth in claim. 13
  • FIG. 1 the production, the refinement of a wood-free fibrous web and the running direction L of the fibrous web produced are shown in an online process.
  • first of all the application of a first application layer 10 or 10 ' is simultaneously effected by means of a first film applicator 11 on both web sides a and b.
  • glue or starch is used to penetrate and strengthen the fibrous web B.
  • an intermediate drying 12 or 12 'and an intermediate smoothing 13 or 13' is now a pigment-containing coating color with a second Film applicator 14 also applied simultaneously on both sides a and b of the fibrous web B. This achieves a second application layer 15 or 15 '.
  • This last application layer 16 which is now applied with a blade applicator (blade coater) 17 and at least on a web page a or b, or both web sides a and b is, with the aid of a doctor element 17.2 or 17.2 '(which is referred to as a blade, but a blade or squeegee bar or a rotary squeegee bar) be evened as Egalisierelement.
  • a doctor element 17.2 or 17.2 ' which is referred to as a blade, but a blade or squeegee bar or a rotary squeegee bar
  • FIG. 2 are clearly visible to the applied with the individual commissioned bar or application layers 10, 10 '; 15, 15 'and 16, 16' on the fibrous web B.
  • the film applicators 11 and 14 for the superimposed layer layers 10, 10 'and 15, 15' each consist of an employed against the web page b application roller 11.1 or 14.1, which is associated with a nozzle application unit 11.2 or 14.2 and a counter-application roller 11.1 'or 14.1. ' with likewise respectively assigned application unit 11.2 'or 14.2' on the other side of the track b.
  • the pairs of rollers consisting of said applicator rollers 11.1 and 11.1 'as well as 14.1 and 14.1' are pressed against each other so that an application nip N is formed between them.
  • the fibrous web sides a and b simultaneously receive the application medium and thereby the application layers 10, 10 'and 15 or 15' are formed.
  • Bladecoater 17 and 17' For the last and final application layer 16 and 16 'on the web page a and on web page b is a Bladecoater (Klingenstreich annoying) 17 and 17' is provided in each case.
  • the Bladecoater 17 or 17 ' consists of a coating unit 17.1, or 17.1' and a subsequent doctor element 17.2 or 17.2 'for dosing and equalizing the applied here directly direct application layer 16 or 16'. Both units 17.1 and 17.1 'are employed during the coating process in each case against a counter or support roller 17.3 or 17.3', for supporting and guiding the fibrous web B during the coating.
  • first application layer 10, 10 'with a film applicator 11 and the last application layer 15 or 15' is applied to at least one web page a or b with the Bladecoater 17.
  • the device according to the invention is easy to convert and is therefore suitable both for a high applied coat weight of up to 120 g / m 2 , as well as for a low stitch weight of about 30 g / m 2 and is therefore universally applicable.

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  • Paper (AREA)
EP20070150129 2007-02-28 2007-12-19 Procédé de fabrication d'une bande de matière fibreuse revêtue, en particulier de papier ou de carton Not-in-force EP1964972B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710009398 DE102007009398A1 (de) 2007-02-28 2007-02-28 Verfahren zur Herstellung einer beschichteten Faserstoffbahn, insbesondere aus Papier oder Karton

Publications (3)

Publication Number Publication Date
EP1964972A2 true EP1964972A2 (fr) 2008-09-03
EP1964972A3 EP1964972A3 (fr) 2012-01-18
EP1964972B1 EP1964972B1 (fr) 2013-09-25

Family

ID=39533788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070150129 Not-in-force EP1964972B1 (fr) 2007-02-28 2007-12-19 Procédé de fabrication d'une bande de matière fibreuse revêtue, en particulier de papier ou de carton

Country Status (2)

Country Link
EP (1) EP1964972B1 (fr)
DE (1) DE102007009398A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012013384A1 (fr) * 2010-07-28 2012-02-02 Voith Patent Gmbh Procédé de fabrication d'une bande de matière fibreuse, en particulier d'une bande de papier ou de carton

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI128981B (en) 2018-07-27 2021-04-30 Voith Patent Gmbh Method and apparatus for applying starch

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19545408C5 (de) * 1995-12-06 2004-01-22 Voith Sulzer Papiermaschinen Gmbh Verfahren zur Oberflächenveredelung einer Kartonbahn
DE102004041537A1 (de) * 2004-08-27 2006-03-02 Voith Paper Patent Gmbh Verfahren und Vorrichtung zum Herstellen einer gestrichenen LWC-Papierbahn

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012013384A1 (fr) * 2010-07-28 2012-02-02 Voith Patent Gmbh Procédé de fabrication d'une bande de matière fibreuse, en particulier d'une bande de papier ou de carton

Also Published As

Publication number Publication date
DE102007009398A1 (de) 2008-09-04
EP1964972A3 (fr) 2012-01-18
EP1964972B1 (fr) 2013-09-25

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