WO2009147198A1 - Procédé de réalisation de test liner et/ou de matériau ondulé - Google Patents

Procédé de réalisation de test liner et/ou de matériau ondulé Download PDF

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Publication number
WO2009147198A1
WO2009147198A1 PCT/EP2009/056854 EP2009056854W WO2009147198A1 WO 2009147198 A1 WO2009147198 A1 WO 2009147198A1 EP 2009056854 W EP2009056854 W EP 2009056854W WO 2009147198 A1 WO2009147198 A1 WO 2009147198A1
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WO
WIPO (PCT)
Prior art keywords
twin
wire
range
forming roller
screen
Prior art date
Application number
PCT/EP2009/056854
Other languages
German (de)
English (en)
Inventor
Erich Brunnauer
Manfred Feichtinger
Jean Y. Nouaze
Jürgen Prössl
Mathias Schwaner
Wolfgang Schwarz
Franz Stelzhammer
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 WO2009147198A1 publication Critical patent/WO2009147198A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type

Definitions

  • the invention relates to a process for the production of testliner and / or corrugating agent.
  • Testliner and corrugating agent are paper having a specific basis weight in the range of 70 to 200 g / m 2 , in particular in the range of 90 to 150 g / m 2 and an undefined fiber composition consisting predominantly of waste paper.
  • Testliner is used as a ceiling material for corrugated board.
  • Corrugated material is also material for the shaft of a corrugated board. It uses higher quality raw materials than Schrenz.
  • treatment with starch or resins is often additionally used to increase the rigidity (see, for example, the encyclopaedia "Dinkhauser Kartonagen", http://www.dinkhauser.com/lexikon/index.html).
  • the invention is thus based on the object of specifying a most efficient, cost-effective method for producing testliner of at least one of the grades TL 3 and TL D and / or corrugating medium.
  • this object is achieved by a method for producing testliner of at least one of the grades TL 3 and TL D and / or corrugating medium using a twin-wire former having two screen belts forming a twin-wire zone, a bottom wire and a top wire a forming roll to form a Fibrous suspension converge from a headbox receiving wedge-shaped inlet gap, are guided in a first section of the twin-wire zone around this forming, are guided in a immediately subsequent, steeply downwardly extending second section of the twin-wire over other drainage elements and passed at the end of the twin-wire zone via a separator are in the range of one of the two screen belts is separated from the formed fibrous web and the other screen belt.
  • the twin-wire former is advantageously used for producing testliner of at least one of the grades TL 3 and TL D, wherein preferably raw material or raw materials of at least one of the grades of group 1 .02 to DIN EN 643: 2001 and group 1 .04 to DIN EN 643 : 2001 and / or at least one group 1 .05 raw material according to DIN EN 643: 2001.
  • Twin-wire formers in the manner of a so-called "gap former" are known as such from the documents EP-B-0 933 473, US 4 925 531 and DE-A-195 30 983.
  • none of these known twin-wire former is intended for the production of testliner and / or corrugating agent.
  • the twin-wire former used may be adapted to the particular requirements of the production of testliner at least one of the grades TL 3 and TL D and / or corrugating medium, among other things in the manner described in more detail below, with the particular requirements, in particular the strengths such for example, SCT, CMT, Burst, RLV, etc. count.
  • Group 1 .02 according to DIN EN 643: 2001 and Group 1 .04 according to DIN EN 643: 2001 and / or at least one raw material of group 1 .05 according to DIN EN 643: 2001 results in a tailor - made concept for the production of testliner Grades TL 3 and TL D. It results in a significant improvement in the strength properties of the product to be produced as well as a significant increase in the drainage performance.
  • the grades TL 3 and TL D and corrugating medium are, as stated above, grades with a basis weight in the range of 70 to 200 g / m 2 , in particular in the range of 90 to 150 g / m 2 according to the measuring standard DIN ISO 536 in particular with the following strength properties: SCT CD index up to 22 Nm / g, in particular up to 20 Nm / g according to the measuring standard DIN 54518 (Tappi T 826), CMT 30 index in the range from 1, 3 to 1, 9 Nm 2 / g in accordance with the measurement standard DIN EN ISO 7263 (Tappi T 825), Burst Index up to 3.4 kPa m 2 / g, in particular up to 3.2 kPa m 2 / g in accordance with the measurement standard DIN EN ISO 2759, RCTc D -Index up to 10 Nm / g, in particular up to 9 Nm / g, Smoothness Bekk 8 to 10 sec according to the measurement conditions according to DIN EN
  • the diameter of the forming roll of the twin-wire former used is advantageously in a range of about 1500 to 2000 mm, in particular in a range of about 1700 to 1900 mm and preferably in a range of about 1750 to about 1850 mm.
  • the outer circumferential surface of the forming roller of the twin-wire former used preferably has an open structure, in particular a honeycomb structure.
  • this open structure can be generated in particular by a corresponding reference.
  • storage volume is made available for dewatering the suspension, for example from the aforementioned raw materials.
  • Twin-wire former is designed as a suction roll. It has been found that for the production of particular testliner of the above varieties the
  • Vacuum loading in the forming roll to increase said Strength values leads.
  • An evacuated forming roller enables optimum strength values, in particular SCT CD , RCT CD and Burst.
  • the forming roller can also be completely unabsucked.
  • a preferred practical embodiment of the method according to the invention is characterized in that the wrap angle with which the forming roller of the twin-wire former used is looped by the two screen belts from the point of particular tangential coincidence of the two screen belts to the point of particular tangential flow of the two screen belts , in a range of about 70 to about 150 °, more preferably in a range of about 100 to about 130 °, and preferably in a range of about 1 10 to about 120 °.
  • the drainage performance is further increased.
  • the advantage of such a configuration is thus in particular in a further improvement of the strength properties and the drainage increase.
  • the twin-wire former used comprises a catching device arranged inside the loop of the upper wire which does not touch the forming roller, for water thrown off the forming roll.
  • this collecting device may for example comprise a jet channel, in which the water is spun off and which opens into a collecting container or the like of the collecting device.
  • the drainage performance can be further increased.
  • the further drainage elements assigned to the second section of the twin-wire zone of the twin-wire former used may advantageously comprise strips of a wire drainage arrangement.
  • the number of strips may be in a range from about 6 to about 22, more suitably in a range of about 8 to about 16, and preferably in a range of about 9 to about 15.
  • the strip drainage arrangement is preferably subjected to a vacuum. It is advantageous if the Leistenent camessans extract total, that is, the entire strip area is acted upon by one and the same vacuum. A subdivision into zones is therefore not required here. In principle, however, such a subdivision is conceivable.
  • the strip drainage arrangement is expediently arranged within the loop of the upper wire.
  • the further dewatering elements associated with the second section of the twin-wire zone of the twin-wire former used may advantageously also comprise at least one vacuum-dewatering element arranged within the loop of the lower wire.
  • one or more additional drainage elements can also be provided within the loop of the upper wire.
  • vacuum-assisted drainage elements provided on the lower sieve and / or in particular such additional drainage elements provided on the upper sieve increase, in particular, the drainage performance through the upper sieve.
  • the separating device in the region of which one of the two screen belts is separated from the formed fibrous web and the other screen belt, can comprise, for example, a vacuum-loaded element.
  • the steeply downwardly extending second section of the twin-wire zone of the twin-wire former used with an imaginary vertical plane encloses an angle in the range of about 10 to about 50 ° and preferably in a range of about 10 to is about 45 °. It is particularly advantageous if, immediately after the twin-wire zone of the twin-wire former used, the wire web carrying the fibrous web first at least substantially horizontally and immediately thereafter generally obliquely downward, generally obliquely upward and immediately thereafter, at least in the middle Is substantially horizontal, at least substantially horizontally or generally obliquely upwards.
  • the fibrous web with leading sieve belt following the twin-wire zone of the double-wire former used may have at least one additional
  • such an additional drainage element can be designed as a two-zone vacuum-loaded element, as considered in the web running direction.
  • the number of additional drainage element can be designed as a two-zone vacuum-loaded element, as considered in the web running direction.
  • Elements may vary depending on the particular composition of the raw material, in particular of the above-mentioned varieties.
  • a vacuum-charged, one- or two-zone, preferably two-zone, drainage element which has a curved surface with one or different curvatures.
  • the radii of curvature may, for example, in a range of about 1/3 to about 1/8 nr ⁇ 1 , in particular in a range of about 0.5 to about 1/15 m "1 and preferably in a range of about 0.5 to about 1/20 m "1 lie.
  • the number of drainage elements provided between the separator and this vacuum-charged element having a curved surface can, for example, be in a range from 0 to 3, and preferably 1 or 2, depending on the particular composition of the raw material, in particular of the varieties described above.
  • the screen belt carrying the fibrous web can, for example, be directed horizontally or at an angle, for example in a range from 0 to approximately 30 °, in particular be deflected in a range of about 5 to about 20 °, and preferably in a range of about 8 to about 15 °.
  • a further vacuum-charged one- or two-zone, preferably single-tone dewatering element can be provided which, depending on the deflection angle of the fibrous web which carries the screen belt with it, is attached to this screen belt.
  • This dewatering element can advantageously be subjected to a higher vacuum than the other dewatering elements, wherein the vacuum in question can be in particular in a range of about 300 to about 1000 kPa and preferably in a range of about 450 to about 650 kPa.
  • An embodiment of the higher vacuum element having the aforementioned curvatures may replace the aforementioned curved surface element. In this case, it is conceivable, after the separating device, to use only such an element, applied with a greater vacuum and having the curvatures as a vacuum-charged drainage element.
  • the fibrous web can then be transferred by a suitable transfer device to the following facilities.
  • a twin-wire former with two sieve belts forming a twin-wire zone comprising a bottom wire and a top wire is used for producing testliner and / or corrugating medium
  • the two wire belts converging in the region of a forming roller to form a pulp suspension from a headbox receiving wedge-shaped inlet gap are guided in a first section of the twin-wire zone around this forming roller, are guided in a immediately following, steeply downwardly extending second section of the twin-wire over other drainage elements and are guided at the end of the twin-wire zone via a separating device, in the region of one of the two screen belts is separated from the formed fibrous web and the other screen belt, and wherein preferably raw material or raw materials of at least one of the varieties of the group 1 .02 according to DIN EN 643: 2001 and group 1 .04 according to DIN EN 643: 2001 and / or at least one raw material of group 1.05 according to DIN EN 643: 2001.
  • Fig. 1 is a schematic representation of an exemplary embodiment of a used for the production of testliner and / or corrugating agent
  • Doppeltelsiebformers with immediately following the Doppelsiebzone first at least substantially horizontally and immediately thereafter generally obliquely downward guided the fibrous web carrying Untersieb; 2 shows a schematic partial representation of a modified embodiment of the twin-wire former comparable to the embodiment according to FIG. 1, in which immediately after the twin-wire zone the bottom fabric wire leading to the fibrous web is guided generally obliquely upward and immediately thereafter at least substantially horizontally;
  • FIG. 3 shows a schematic partial representation of a further embodiment of the twin-wire former comparable to the embodiment according to FIG. 1, in which the underside screen carrying the fibrous web is guided at least substantially horizontally immediately after the twin-wire zone;
  • FIG. 4 shows a schematic partial representation of a further embodiment of the twin-wire former comparable to the embodiment according to FIG. 1, in which the underside screen carrying the fibrous web is led generally obliquely upwards following the twin-wire zone; and
  • Fig. 5 is a partial schematic representation of another comparable with the embodiment of FIG. 1 modified embodiment of the Doppelsiebformers, wherein between the separator and the point at which the fibrous web is removed from the lower wire, only the curved surface having a drainage element is provided.
  • FIG. 1 shows a schematic representation of an exemplary embodiment of a twin-wire former 10 used according to the invention for the production of testliner and / or corrugating medium with two screen belts 12, 14 forming a twin-wire zone.
  • the two screen belts 12, 14 comprise a bottom wire 12 and a top wire 14, which converge in the region of a forming roller 16 to form a wedge-shaped inlet gap 18, into which pulp suspension is introduced via a headbox 20.
  • the two screen belts 12, 14 are in a first section of the twin-wire zone around the forming roller 16, in a directly adjoining, steeply downwardly extending second section of the twin-wire zone via further drainage elements 22 ', 22 ", 24, 26 and at the end of the twin-wire zone passed through a separator 28, in the region of one of the two screen belts 12, 14, here the bottom wire 12, from the formed fibrous web and the other wire, here the top wire 14, is separated.
  • the twin-wire former 10 is preferably used for producing testliner of at least one of the grades TL 3 and TL D.
  • Raw materials or raw materials of at least one of the grades of group 1 .02 according to DIN EN 643: 2001 and group 1 .04 according to DIN EN 643: 2001 and / or at least one raw material of group 1 .05 according to DIN EN 643: 2001 are preferred used.
  • the diameter D of the forming roll 16 may be, for example, in a range of about 1500 to about 2000 mm, and more preferably in a range of about 1700 to about 1900 mm, preferably in a range of about 1750 to about 1850 mm.
  • the outer peripheral surface of the forming roller 16 may have an open structure, preferably a honeycomb structure. This can be formed for example by a corresponding reference.
  • the forming roller 16 may be designed in particular as a suction roller, but it may also be unabsucked.
  • the wrap angle ⁇ with which the forming roller 16 of the twin-wire former 10 used is looped by the two screen belts 12, 14 from the point of the particular tangential coincidence of the two screen belts 12, 14 up to the point of the particular tangential run of the two screen belts 12, 14
  • ⁇ is in a range of about 70 to about 150 degrees, and more preferably in a range of about 100 to about 130 degrees, and is preferably in a range of about 110 to about 120 degrees.
  • the twin-wire former 10 may comprise a collecting device 30 arranged within the loop of the upper wire 14, which does not touch the forming roller 16, for water thrown off the forming roller 16.
  • this collecting device 30 for example, a jet channel 30 ', in which the water is thrown off, and a collecting container 30 "include, in which the jet channel 30' opens.
  • the further drainage elements 22 ', 22 ", 24, 26 associated with the second section of the twin-wire zone may comprise strips 22', 22" of a strip drainage arrangement 22, which is preferably subjected to a vacuum.
  • the number of strips for example, in a range of about 6 to about 22 and suitably in a range of about 8 to about 16, preferably in a range of about 9 to about 15.
  • the strip drainage arrangement 22 can be acted upon in total, for example, with one and the same vacuum. A subdivision into zones is therefore not provided in this case. In principle, however, another embodiment or subdivision of this strip drainage arrangement 22 is conceivable.
  • the strip drainage arrangement 22 can be arranged in particular within the loop of the upper wire 14.
  • the further dewatering elements assigned to the second section of the twin-wire zone may in particular also comprise one or more vacuum-activated dewatering elements 24 arranged within the loop of the lower wire 12.
  • the two screen belts 12, 14 are guided at the end of the steeply downwardly extending second portion of the twin-wire zone around a guide roller 32, in whose area they are deflected so that they subsequently extend at least substantially horizontally.
  • the further drainage elements 22 ', 22 ", 24, 26 associated with the second section of the twin-wire zone can also be at least one, for example, between the
  • Leistenent deltassansakusanakunow 22 and the guide roller 26 provided, arranged within the loop of the upper wire 14 drainage element 26 include.
  • the vacuum-loaded drainage elements 24 on the lower wire 12 and in particular the at least one optional drainage element 26 on the upper wire 14 increase the dewatering performance through the upper wire 14.
  • the steeply downwardly extending second section of the twin-wire zone includes, with an imaginary vertical plane V, an angle Y which can amount in particular to a range from about 10 to about 50 °, and is preferably in a range from about 10 to about 45 °.
  • the fibrous web continued downstream of the separating device 28 on the lower wire 12 is removed from the lower wire 12 in the region of a deflection suction roll 34 by a permeable belt 36 guided around this deflection suction roll 34.
  • At least one additional drainage element 38-42 can be assigned to the bottom fabric 12 leading to the fibrous web.
  • the lower fabric 12 leading to the pulp web through the permeable belt 36 is initially at least substantially horizontal and immediately thereafter generally obliquely downward guided.
  • the fibrous web is then removed in the region of Umlenksaugwalze 34 through the permeable belt 36 in the obliquely downwardly guided portion of the lower wire 12.
  • the separating device 28, at which the upper sieve 14 is separated from the fibrous web and the lower sieve 12, can comprise, for example, at least one vacuum-loaded separating element.
  • a drainage element 40 with a curved or straight surface may be provided in the area in which, following the twin-wire zone, the bottom fabric 12 carrying the fibrous web 12 is deflected generally obliquely downward.
  • This dewatering element 40 can be subjected to vacuum loading and can be embodied in one or two-zone, wherein in the present case, viewed in the direction of web travel, it is designed, for example, as a two-zone.
  • the lower fabric 12 carrying the fibrous web can, for example, be deflected relative to the horizontal H by an angle ⁇ , the magnitude of which is, for example, in a range between 0 and about 30 ° , in particular in a range between about 5 and about 20 ° and preferably in a range of about 8 and about 15 °.
  • At least one further vacuum-evacuated drainage element 42 can be assigned to the lower wire 12, which can be configured as one or two-tone and in the present case, for example, is mononuclear and is adjusted to the lower wire 12, depending on the respective deflection angle ⁇ ,
  • this dewatering element 42 can advantageously be subjected to a higher vacuum than the other dewatering elements 38, 40, wherein the vacuum can be selected in particular in a range of about 300 to about 1000 kPa and preferably in a range of about 450 to about 650 kPa.
  • dewatering element 42 with the curvatures mentioned with reference to the dewatering element 40 may replace the dewatering element 40.
  • only such a dewatering element 42 with higher vacuum loading and curved surface may be provided as a vacuum-loaded drainage element.
  • the fibrous web can be passed to the following facilities.
  • FIG. 2 shows a schematic partial representation of a comparable with the embodiment of FIG. 1 modified embodiment of the invention used for the production of testliner and / or Wellenstoff Doppelsiebformers 10. It is in the present case immediately following the twin-wire zone, the fibrous web with leading Untersieb 12 first generally obliquely upward and immediately thereafter guided at least substantially horizontally.
  • twin-wire former 10 can at least essentially be designed again in the same way as the parts corresponding to FIG. 1 are assigned the same reference numerals.
  • FIG. 3 shows a schematic partial representation of another comparable with the embodiment of FIG. 1 modified embodiment of the invention used for the production of testliner and / or Wellenstoff Doppelsiebformers 10. It is in the present case immediately following the twin-wire zone leading the fibrous web with it Under sieve 12 guided at least substantially horizontally.
  • twin-wire former 10 can at least essentially be designed again in the same way as the parts corresponding to FIG. 1 are assigned the same reference numerals.
  • FIG. 4 shows, in a schematic partial representation, a further modified embodiment of the invention comparable to the embodiment according to FIG In the present case, immediately following the twin-wire zone, the bottom fabric wire 12 carrying the fibrous web is guided generally obliquely upward in the present case for the production of testliner and / or corrugating medium.
  • twin-wire former 10 can at least substantially again have the same structure as that according to FIG. 1. Corresponding parts are assigned the same reference numerals.
  • Fig. 5 shows a schematic partial view of a further comparable with the embodiment of FIG. 1 modified embodiment of the invention used for the production of testliner and / or Wellenstoff double twin shaper 10.
  • a curved surface having a drainage element 40 is provided, which is preferably applied according to the dewatering element 42 of the embodiment of FIG. 1 again with a correspondingly higher vacuum and again one or two-tone executed , where it is in the present case, for example, two-tone.
  • twin-wire former 10 can at least substantially again have the same structure as that according to FIG. 1. Corresponding parts are assigned the same reference numerals.
  • the lower wire 12 may first be guided in such a way that it forms an angle with the horizontal H which is in the range from 0 to about 45 ° and preferably in a range from 0 to about 10 ° , LIST OF REFERENCE NUMBERS

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Abstract

La présente invention concerne un procédé de réalisation d'un test liner d'au moins l'un des types TL 3 et TL D et/ou d'un matériau ondulé, par utilisation d'une machine à papier à double toile (10) comprenant deux toiles (12, 14) qui comprennent une toile inférieure (12) et une toile supérieure (14) et forment une zone double toile. Les toiles (12, 14) qui se rejoignent dans la zone d'un rouleau de formation (16) en formant un espace d'entrée (18) cunéiforme qui prend en charge une suspension de matière fibreuse provenant d'une caisse de tête (20), passent autour de ce rouleau de formation (16) dans une première section de la zone double toile, sur d'autres éléments d'égouttage (22', 22'', 24, 26) dans une deuxième section de la zone double toile, qui s'y raccorde directement et est fortement inclinée vers le bas, et sur un dispositif de séparation (28) à l'extrémité de la zone double toile, l'une (12) des deux toiles (12, 14) étant séparée de la bande de matière fibreuse formée et de l'autre toile (14) dans la zone de ce dispositif de séparation.
PCT/EP2009/056854 2008-06-06 2009-06-04 Procédé de réalisation de test liner et/ou de matériau ondulé WO2009147198A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810002278 DE102008002278A1 (de) 2008-06-06 2008-06-06 Verfahren zur Herstellung von Testliner und/oder Wellenstoff
DE102008002278.0 2008-06-06

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WO2009147198A1 true WO2009147198A1 (fr) 2009-12-10

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PCT/EP2009/056854 WO2009147198A1 (fr) 2008-06-06 2009-06-04 Procédé de réalisation de test liner et/ou de matériau ondulé

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WO (1) WO2009147198A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115038835A (zh) * 2020-01-30 2022-09-09 安德里茨股份公司 用于生产纸浆幅材的设备和方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010011584A1 (en) * 1999-12-15 2001-08-09 Valmet-Karlstad Ab Arrangement and method for forming a multilayered paper or paperboard web
EP0933473B1 (fr) * 1998-01-30 2004-06-16 Voith Paper Patent GmbH Formeur a deux toiles

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI84734C (fi) 1988-05-23 1992-01-10 Valmet Paper Machinery Inc Dubbelviraformare foer pappersmaskin.
DE19530983B4 (de) 1995-08-23 2006-04-27 Voith Paper Patent Gmbh Vorrichtung zum Herstellen eines mehrlagigen Papiers oder Kartons

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0933473B1 (fr) * 1998-01-30 2004-06-16 Voith Paper Patent GmbH Formeur a deux toiles
US20010011584A1 (en) * 1999-12-15 2001-08-09 Valmet-Karlstad Ab Arrangement and method for forming a multilayered paper or paperboard web

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115038835A (zh) * 2020-01-30 2022-09-09 安德里茨股份公司 用于生产纸浆幅材的设备和方法
CN115038835B (zh) * 2020-01-30 2023-03-28 安德里茨股份公司 用于生产纸浆幅材的设备和方法

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