EP1188861A2 - Dispositif et procédé d'application de materiau fluide ou pâteux sur une bande en mouvement - Google Patents

Dispositif et procédé d'application de materiau fluide ou pâteux sur une bande en mouvement Download PDF

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Publication number
EP1188861A2
EP1188861A2 EP01117338A EP01117338A EP1188861A2 EP 1188861 A2 EP1188861 A2 EP 1188861A2 EP 01117338 A EP01117338 A EP 01117338A EP 01117338 A EP01117338 A EP 01117338A EP 1188861 A2 EP1188861 A2 EP 1188861A2
Authority
EP
European Patent Office
Prior art keywords
application
material web
web
coating
application medium
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.)
Ceased
Application number
EP01117338A
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German (de)
English (en)
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EP1188861A3 (fr
Inventor
Lothar Dr. Pfalzer
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 Paper 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 Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1188861A2 publication Critical patent/EP1188861A2/fr
Publication of EP1188861A3 publication Critical patent/EP1188861A3/fr
Ceased 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
    • D21H23/24—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
    • D21H23/28—Addition before the dryer section, e.g. at the wet end or press section

Definitions

  • the invention relates to a method for applying a liquid or pasty Application medium on a running material web, in particular paper or Material web, according to the preamble of claim 1 and a device for Applying a liquid or pasty application medium to a running material web, in particular paper or cardboard web, according to claim 15 or 17.
  • German patent application DE 198 23 724 A1 (PB10727 DEK) is known from the prior art.
  • a material web is formed in the twin-wire zone of a wet part of a paper machine, to which a liquid or pasty application medium, for example a coating color, is applied at least on one side by means of an application device.
  • a liquid or pasty application medium for example a coating color
  • another liquid or pasty application medium for example a fine fiber suspension
  • the paper machine for carrying out the disclosed method has an application device both in the twin-wire zone of the wet part and at least one application device in the press section which faces directly the material web.
  • a disadvantage of this disclosed method is that the addition of Coating color in the wet part carries the risk that the coating color due to the Size of their pigment particles knocks into the material web during dewatering, that means in inner layers or areas of the Material web migrated so that it only partially improves the surface and consequently the surface quality and the printability of the material web are only insignificant, if anything improved.
  • This object is achieved according to the invention in a method of the type mentioned at the outset in that at least one organic material which improves both the surface quality and the printability of the material web is used as the application medium.
  • This organic material "reinforces" the material web which is being formed by means of a barrier layer and thereby contributes significantly to preventing the migration of at least one substance which is preferably added superficially into the inner layers or regions.
  • the organic material retains at least one substance, preferably added on the surface, better during the dewatering of the material web that forms, and the material web that is formed thus forms a smoother surface.
  • a suspension of cellulose fibers and / or of paper fibers, each with a high degree of grinding be used as the organic material.
  • the cellulose fibers and / or the paper fibers have a degree of grinding of ⁇ 50 ° SR (Schopper-Riegler value (degree of grinding) in accordance with leaflet V / 7/61, revision of 107, Association of Cellulose and Paper Chemists and Ingenieure, edition 01.07.1961), preferably from ⁇ 70 ° SR, particularly preferably from ⁇ 85 ° SR.
  • the organic material in this form provides advantages in terms of keeping the paper or board machine clean and reliable due to no sticking of the at least one sieve, no contamination of the white water, better dewatering or no significant deterioration in the dewatering behavior.
  • the application medium is applied in the former or in the press area, since the dry content and the strength of the material web do not yet assume any values which reduce or prevent penetration of the application medium into the material web.
  • wet end is understood to mean the headbox, the former and the press region of a paper or board machine.
  • the at least one added Material is at least one coating color and that before the application medium the coating color is added to the application on the material web or that after application of the application medium, the coating color by means of a second, the secondary application device downstream of the main application device Material web is applied.
  • the time difference between the application of the organic application medium and the coating color preferably takes a value in the range from 1 ms to 100 ms, preferably from 20 ms to 50 ms, since this time difference under technological Aspects to achieve good efficiency, especially order efficiency, is sufficient and taking into account the machine speed the paper or board machine also has a structural advantage achieved with respect to the arrangement of the application devices and the like.
  • the coating color usually contains components of offset color or rotogravure ink, as these two types of ink are the proven state of the art belong, are produced in large quantities and thus under economical interesting conditions can be used. Are also suitable these two types of colors, among other things, due to their chemical properties excellent for the application according to the invention.
  • the at least one application medium is directly and / or indirectly on the Material web applied. Both types of orders have their own advantages in terms of Efficiency, area of application, costs and the like on; the order type must ultimately be determined depending on the application.
  • the direct application can for example by means of spray nozzles, direct applicators or press rollers happen, the indirect application, however, by means of application rollers or like.
  • the application is direct or indirect Application device and intermediate covering, in particular Sieve or felt, possible.
  • the at least one order medium As economically as possible It is also proposed that it be metered onto the material web is applied.
  • the at least one application medium is preferred over the width of the material web sectioned on the same, because here the advantage of targeted influence on the cross profile of the application medium grows. moreover the sectioned application can also bring financial benefits.
  • a main application device with at least one supply line for supplying an application medium which consists of at least one organic material and which has both the surface quality and the printability of the material web is improved.
  • the application device and / or the feed line preferably has at least one further feed line for feeding at least one coating color.
  • a second device of the type mentioned at the outset solved in that in the wet part of a paper or board machine a main application device at least on one side of the material web at least one feed line for feeding at least one application medium, which consists of at least one organic material and which both the surface quality and the printability of the material web improved, is arranged and that at least a second, the main application device Subsequent re-application device with at least one supply line is arranged to supply at least one coating color.
  • an application device is divided into at least two order sections and each order section can be regulated separately with regard to their order quantity or is controllable. It goes without saying that the application device can be divided into any number of order sections and / or for example the number and widths of the sections of a material density controlled Headbox can be adjusted.
  • the at least one application device can be an applicator, a spray nozzle or be a press roller, since these types of devices are the proven state of the art Count technology and also be purchased and operated at low cost can.
  • the pressure in the at least one application device is preferably between 0.05 bar and 0.5 bar, preferably between 0.1 bar and 0.4 bar. These pressure ranges allow efficient Use of the application device and consideration of the operating costs.
  • the solids content of the material web is also in the range the at least one application device between 5% and 60%, preferably between 8% and 17%, the solids content of at least one Application medium, however, between 5% and 50%, preferably between 10 % and 30% because these areas positively support the efficiency of the application.
  • the total application weight of the at least one application medium per material web surface is between 1 g / m 2 and 10 g / m 2 dry weight from the point of view of economy and efficiency
  • the wet part can have a headbox, which is a multi-layer headbox and / or headbox is formed with fins.
  • a first embodiment of the application device according to the invention is generally designated 10.
  • the application device 10 is arranged in the wet part of a machine for producing a material web 12, in particular from paper or cardboard, which can be seen in FIG. 1 by the fact that the still moist material web 12 is received between two screen belts 14 and 16, which ensure the cohesion of the Ensure the fiber structure of the material web 12.
  • the material web 12 is guided around a roller 18 in addition to the sieve belts 14 and 16 and lies in a wrapping area U on the surface 18a of the material web 12.
  • the roller 18 is driven in rotation about its axis A in the direction of rotation P (arrow), so that the material web 12 in its movement in the running direction L (arrow) engages with the roller surface 18a of the roller 18 essentially without slipping.
  • the headbox upstream of the twin wire former 14 and 16, for example a gap former, is not shown in FIG. 1 because it is not essential to the invention and is well known to the person skilled in the art.
  • an application unit 20 in the form of a free jet nozzle application unit 22 is arranged, which is arranged at a distance from the material web 12 or the screen belt 16 and the application medium 24 predisposes to the Applies material web 12 or on the screen belt 16.
  • the application unit 20 is followed by a leveling device 26 in the direction of rotation P (arrow), which in the embodiment according to FIG. 1 comprises a scraper arrangement 28, but in principle can also be formed by any other known doctoring or leveling device.
  • the leveling device 26 smoothes the applied application medium 24 and removes any excess application medium 24 again in order to add it again to the feed stream M to the free-jet nozzle applicator 22 after an intermediate cleaning step (not shown).
  • the roller 18 also has a vacuum zone 30.
  • a feed line 32 for feeding the same with at least one organic material 36, which preferably consists of a suspension of cellulose fibers and / or paper fibers, each with a high freeness and a freeness of ⁇ 50 ° SR, preferably of ⁇ 70 ° SR, particularly preferably of ⁇ 90 ° SR, assigned.
  • a further feed line 32.1 opens into the feed line 32, by means of which at least one coating color 34, which preferably contains components of offset ink or gravure ink, is fed into the feed line 32.
  • the application medium 24 is fed directly to the application unit 20 by means of the feed stream M.
  • the flow rates in the two feed lines 32 and 32.1 can be regulated or controlled; the possible types of control are part of the prior art and are therefore not explained in more detail here.
  • the solids content of the material web 12 in the area of the application device 10 can be between 5% and 60%, preferably between 8% and 17%, while the solids content of the application medium 24 can be between 5% and 50%, preferably between 10% and 30%, can be.
  • the total application weight of the application medium 24 is also advantageously between 1 g / m 2 and 10 g / m 2 .
  • FIG. 2 represents a further embodiment of an application device 10 according to the invention.
  • the material web 12 is supported only on the side facing the roller (formation as application roller 18.1) by a screen belt 14. Furthermore, the application roller 18.1 has no vacuum zone according to the roller 18 in FIG. 1.
  • the application roller 18.1 can thus be, for example, a simple deflection roller for the material web 12, which is moved in the running direction L (arrow).
  • the application medium 24 is applied to the application roller surface 18.1a by means of an application unit 20 with sliding contact as an application layer 38.
  • This application layer 38 is conveyed as a result of the rotation of the application roller 18.1 about the axis A in the direction of rotation P (arrow) to the wrapping area U, in which the application medium 24 is brought into contact with the material web 12.
  • the application medium 24 when entering the wrapping area U, the application medium 24 is pressed into the material web 12 as a result of the hydrodynamic pressure developing between the application roller surface 18.1a and the material web 12, although the interposition of the screen belt 14 ensures that the pressure is not as great assumes that the application medium 24 would be pressed into the volume 12b of the material web 12, but would remain on the surface 12a of the material web 12.
  • no counter-roller is provided on the side of the material web 12 facing away from the application roller 18.1, so that the material web 12 can also evade the hydrodynamic pressure that is present and thus prevent the application medium 24 from penetrating into the volume of the material web 12.
  • the application roller 18.a is also a cleaning device 19 for cleaning the Application roller surface 18.1a assigned.
  • the cleaning device 19 comprises a dispensing device 19.1 for applying a cleaning medium 19.2 to the application roller surface 18.1a and a scraper blade 19.2 for removing impurities from the application roller surface 18.1 a.
  • the application unit 20 of the application device 10 is assigned a feed line 32 for supplying it with at least one organic material 36.
  • a further feed line 32.1 opens into the application unit 20, by means of which optionally at least one coating color 34 can be fed in.
  • the application medium 24 is then fed to the application roller surface 18.1a by means of application unit 20.
  • the flow rates in the two feed lines 32 and 32.1 can be regulated or controlled; the possible types of control are part of the prior art and are therefore not explained in more detail here.
  • FIG. 3 also represents a further embodiment of an inventive one Application device 10 in the twin wire zone of a wet part.
  • the material web 12 lies between the two sieve belts 14 and 16 and is moved in the running direction L (arrow).
  • the material web 12 is alternately dewatered by the dewatering elements 40 and 40.1, which are only shown as examples.
  • a second application unit 20.1 for applying the application medium 24, which is formed from at least one organic material 36 can be arranged in a further double-screen area supported by a second roller 18.2, for example a screen suction roller.
  • FIG. 4 shows a further embodiment of an application device 10 according to the invention in the twin-wire zone of a wet part.
  • the double sieve consisting of the two sieve belts 14 and 16, and the material web 12 guided between them, which is moved in the running direction L (arrow), can be clearly seen.
  • the two screen belts 14 and 16 run over a first roller 18, in particular a screen suction roller, on the underside of which an application unit 20 is arranged, which applies an application medium 24, which is formed from at least one organic material 36, to the underside of the material web 12 brings.
  • the twin wire is then guided over a second roller 18.2, in particular a wire suction roller, which is wrapped around by the underside of the material web 12, an application unit 20.1 being arranged on the side of the wire belt 16 at the same time, which comprises an application medium 24 which consists of at least one organic Material 36 is formed, brings to the top of the material web 12.
  • the twin wire is then brought up to a subsequent deflecting roller, which lifts the wire 16 from the material web 12, after which the material web 12 which is formed is carried on the wire 14.
  • FIG. 5 spatially shows a further embodiment of an application device 10 according to the invention.
  • the wet section of the Fourdrinier paper or board machine shown consists of a headbox 42 (sectioning and stock density control) known from the German patent application DE 40 19 593 A1 (PA04598 DE) to which high and low consistency pulp suspension streams Q H and Q L are fed ,
  • the headbox 42 distributes the fibrous stock suspension evenly over the fourdrinier wire 44.
  • the fourdrinier wire 44 is deflected over a plurality of rollers 46 and then several dewatering elements 40 are provided on the headbox 42, which dewater the material web 12 lying on the fourdrinier wire 44.
  • a main application device 48 designed as a spray tube 48a with several, but only two, spray nozzles 48b shown, with at least one supply line 50 for applying at least one application medium 24, which is made of at least one organic material 36 is provided.
  • the main application device 48 is followed by a subsequent application device 48.1 in the machine direction R, again as a spray tube 48.1a with several, but only two, spray nozzles 48.1b shown, with at least one feed line 50.1, for applying at least one coating color 34.
  • the two application devices are spaced such that the time difference for the application of the two application media takes on a value in the range from 1 ms to 100 ms, preferably from 20 ms to 50 ms.
  • the pressure in at least one of the two application devices 48 and 48.1 assumes a value between 0.05 bar and 0.5 bar, preferably between 0.1 bar and 0.4 bar.
  • FIG. 6 shows this embodiment of FIG. 5 according to the invention in side view shown, Figure 7 in turn a plan view of an application device of Figure 6.
  • the wet part shown of the Fourdrinier paper or board machine of FIG. 6 essentially consists of the same components as that of FIG. 5, to which reference is hereby made.
  • the two application devices 48 and 48.1 are sectioned across the width of the material web 12, the individual application sections 52 and 52.1 being separately controllable; the possible types of control are part of the prior art and are therefore not explained in more detail here.
  • the application medium 24 is preferably introduced into the application device 48 according to FIG. 7 by means of a transverse distribution pipe 54, then passed through the regulating / control unit 56 and then applied to the material web (not shown) by means of a nozzle 58.
  • FIG. 8 shows in a spatial representation a sectioned headbox 42, in the feed line 32.2 for fiber suspension 60 of which at least one application medium 24, which is formed from at least one organic material 36, by means of feed lines 32.3 and / or in the intermediate chamber 62 thereof at least one coating color 34 is introduced into a feed device 64.
  • the illustrated headbox 42 can also be designed as a headbox with dilution water technology and / or a multi-layer headbox (dashed line) and / or a headbox with fins (dashed line). This results in the advantages already mentioned.
  • the invention is a device and a method of the type mentioned are created that both the Surface quality as well as the printability of the material web if possible improve less technical effort compared to previous solutions, in addition, when a coating color is applied, both a migration of the same in inner layers or areas of the material web (by means of a barrier layer) reduced, preferably completely prevented, as improved retention of the same during drainage is also achieved can be.
EP01117338A 2000-09-19 2001-07-18 Dispositif et procédé d'application de materiau fluide ou pâteux sur une bande en mouvement Ceased EP1188861A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10046171 2000-09-19
DE10046171A DE10046171A1 (de) 2000-09-19 2000-09-19 Verfahren und Vorrichtung zum Auftragen eines flüssigen oder pastösen Auftragsmediums auf eine laufende Materialbahn

Publications (2)

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EP1188861A2 true EP1188861A2 (fr) 2002-03-20
EP1188861A3 EP1188861A3 (fr) 2002-08-07

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EP01117338A Ceased EP1188861A3 (fr) 2000-09-19 2001-07-18 Dispositif et procédé d'application de materiau fluide ou pâteux sur une bande en mouvement

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US (1) US20020060010A1 (fr)
EP (1) EP1188861A3 (fr)
DE (1) DE10046171A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106670065A (zh) * 2017-03-13 2017-05-17 湖北富亿建材股份有限公司 一种用于沥青防水卷材的电控刮刀设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984004115A1 (fr) * 1983-04-11 1984-10-25 Svenska Traeforskningsinst Papier multicouche et son procede de fabrication
WO1985003316A1 (fr) * 1984-01-19 1985-08-01 Svenska Träforskningsinstitutet Papier ayant des proprietes en surface ameliorees et son procede de fabrication
DE4019593A1 (de) * 1990-06-20 1992-01-09 Voith Gmbh J M Stoffauflauf fuer papiermaschinen
DE19823724A1 (de) * 1997-10-24 1999-04-29 Voith Sulzer Papiertech Patent Verfahren und Vorrichtung zum Auftragen eines Mediums auf eine laufende Materialbahn
DE19936476A1 (de) * 1999-08-03 2000-07-06 Ctp Papierhilfsmittel Gmbh & C Streichmasse zur Herstellung bedruckbarer Papiere

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2887911B2 (ja) * 1991-01-25 1999-05-10 王子製紙株式会社 剥離紙
DE10037845B4 (de) * 1999-08-03 2005-09-29 Ctp Gmbh Streichmasse für bedruckbare Papiere und Verfahren zur Herstellung bedruckbarer Papiere

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984004115A1 (fr) * 1983-04-11 1984-10-25 Svenska Traeforskningsinst Papier multicouche et son procede de fabrication
WO1985003316A1 (fr) * 1984-01-19 1985-08-01 Svenska Träforskningsinstitutet Papier ayant des proprietes en surface ameliorees et son procede de fabrication
DE4019593A1 (de) * 1990-06-20 1992-01-09 Voith Gmbh J M Stoffauflauf fuer papiermaschinen
DE19823724A1 (de) * 1997-10-24 1999-04-29 Voith Sulzer Papiertech Patent Verfahren und Vorrichtung zum Auftragen eines Mediums auf eine laufende Materialbahn
DE19936476A1 (de) * 1999-08-03 2000-07-06 Ctp Papierhilfsmittel Gmbh & C Streichmasse zur Herstellung bedruckbarer Papiere

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch, Week 199241 Derwent Publications Ltd., London, GB; Class A94, AN 1992-336173 XP002201401 & JP 04 240299 A (KANZAKI PAPER MFG CO LTD), 27. August 1992 (1992-08-27) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106670065A (zh) * 2017-03-13 2017-05-17 湖北富亿建材股份有限公司 一种用于沥青防水卷材的电控刮刀设备

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Publication number Publication date
EP1188861A3 (fr) 2002-08-07
DE10046171A1 (de) 2002-03-28
US20020060010A1 (en) 2002-05-23

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