EP1966437A1 - Dispositif et procede pour traiter une bande de matiere fibreuse, notamment pour produire une bande de papier de soie - Google Patents

Dispositif et procede pour traiter une bande de matiere fibreuse, notamment pour produire une bande de papier de soie

Info

Publication number
EP1966437A1
EP1966437A1 EP06819355A EP06819355A EP1966437A1 EP 1966437 A1 EP1966437 A1 EP 1966437A1 EP 06819355 A EP06819355 A EP 06819355A EP 06819355 A EP06819355 A EP 06819355A EP 1966437 A1 EP1966437 A1 EP 1966437A1
Authority
EP
European Patent Office
Prior art keywords
web
masking tape
press
crepe
nip
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.)
Withdrawn
Application number
EP06819355A
Other languages
German (de)
English (en)
Inventor
Thomas Scherb
Luiz Carlos Silva
Rogerio Berardi
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 EP1966437A1 publication Critical patent/EP1966437A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/006—Making patterned paper

Definitions

  • the present invention relates to a device for treating a fibrous web, in particular for producing a tissue paper web, with at least one on the one hand by a masking tape and on the other hand by a particular formed by a backing roll web support surface crepe, through which the fibrous web is passed, wherein between masking tape and web support surface a Relative speed is provided and a corresponding method.
  • tissue paper webs for this purpose are pressed mechanically in a press nip, wherein the tissue paper web is supported by a roll surface at a first speed.
  • the web is picked up by a permeable, woven belt with a textured surface and a second speed, the second speed being less than the first speed.
  • the aim is to produce a high-bulk tissue paper web by a so-called creping effect.
  • the press nip thus forms a crepe gap here. But it is also possible to press without pressing force and only with a relative speed in the crepe gap.
  • An object of the present invention is to achieve a good creping effect while reducing the wear of the masking tape. This object is achieved in that the material and / or the structure of the web support surface and the surface of the masking tape with respect to a reduction of the wear of the masking tape by the operation of the device are coordinated.
  • the material and the structure of the web support surface have been selected only for a good creping effect.
  • An influence on the wear of the masking tape was previously unknown.
  • the masking tape is not separated from the web support surface in the creping gap, but rather that the creping tape or at least the cusps of a structured and rough tape are forced against the web support surface despite the intermediate fibrous web.
  • the fibrous web is on the one hand relatively thin and light, namely about 15 g / m 2 to about 40 g / m 2 , and that on the other hand push the bumps due to the Kreppvorganges the fibers of the fibrous web aside.
  • the solution according to the invention eliminates these problems.
  • the tuning is made so that there is a low coefficient of friction between the masking tape and the web supporting surface.
  • a low friction leads to a low wear of the masking tape.
  • the bumps of the masking tape made of soft material.
  • the bumps preferably have a hardness between about 20 and about 120 Pussey & Jones. This low friction coefficient and low wear of the masking tape can be achieved.
  • the web support surface is preferably made of PTFE, while for the masking tape basically any material, in particular a conventional masking tape material can be used.
  • PTFE for the web support surface leads to a low coefficient of friction and thus a low wear of the masking tape.
  • the creping gap may be preceded by a press nip.
  • This can be designed as a long nip, shoe press nip, nip or simply felted nip. The manufacturing process can thereby be further improved.
  • the masking tape consists in particular of structured fabric such as TAD fabric or spiral-bonded fabric. Such material has proven to be particularly advantageous for the creping effect.
  • the masking tape may be permeable or non-permeable, made of woven or non-woven material. This also benefits can be achieved.
  • a drying cylinder in particular Yankee cylinders, may be arranged, and / or a creping gap may be formed on a drying cylinder, in particular Yankee cylinders.
  • a drying cylinder By using a drying cylinder, the creping effect can be further improved.
  • a press nip can be formed on the drying cylinder through which the fibrous web is led together with the masking tape. Also, this can further improve the creping process.
  • the contact area between the masking tape and the drying cylinder and / or between the masking tape and counter-roller is preferably between about 20% and about 70%, more preferably between about 25% and 50% and even more preferably about 30%.
  • a very low wear and a very good quality of the tissue paper web can be achieved. Due to the small contact surface in The intermediate areas created pockets in which the high-loft crepe material is absorbed protected. Nevertheless, a good pressure of the fibrous web and a good tensile strength can be achieved by using the drying cylinder.
  • the press nip on the drying cylinder may be formed by a suction press roll, press roll or shoe press roll with extended nip. This can be achieved good results.
  • the crepe gap may further be formed without mechanical pressing means or with mechanical pressing means. It is also possible to combine different crepe gaps with each other. In this way, the production can be further improved.
  • a mechanical pressing means may be provided a soft press roll, a hard press roll or belt press. Such pressing means are particularly suitable for the intended purpose.
  • the strip preferably has a tensile strength of at least 40 kN / m, preferably at least 50 kN / m and more preferably at least 60 kN / m.
  • the required pressing force can be achieved.
  • the device according to the invention is preferably used for fibrous webs with a mass of about 15 g / m 2 to about 40 g / m 2 .
  • the problem of wear of the masking tape is particularly large and thus also the advantages achieved by the present invention.
  • On the opposite side of the backing roll of the masking tape may also be provided a creping roll or suction press roll. The following properties may be present in the rolls:
  • Composite / resin (TOPROCK): 11, 5 to 13.5 mm thick, roughness from 0.5 to 2.5 ⁇ m Ra, hardness 88 to 94 Shore D, fine ground.
  • Composite 10 to 25 mm thick, roughness from 0.5 to 2.5 ⁇ m Ra, hardness 88 to 94 Shore D, fine ground.
  • Poliurethane 10 to 25 mm thick, roughness of 0.5 to 2.5 ⁇ m Ra, hardness 4 to 200 P & J, finely ground.
  • Rubber 5 to 25 mm thick, roughness of 0.5 to 2.5 ⁇ m Ra, hardness 78 to 85 Shore D, finely ground.
  • Rubber 5 to 25 mm thick, roughness of 0.5 to 2.5 ⁇ m Ra, hardness 1 to 50 P & J, finely ground.
  • Tungsten Carbide 0.1 to 0.8 mm thick, roughness of 0.03 to 1.0 ⁇ m Ra, hardness 900 to 1400 HV, finely ground and superfinished.
  • Chromium carbide 0.1 to 0.8 mm thick, roughness of 0.03 to 1.0 ⁇ m Ra, hardness 800 to 1200 HV, finely ground and superfinished.
  • Ni / Cr chromium carbide 0.1 to 0.8 mm thick, roughness from 0.03 to 1, 0 ⁇ m Ra, hardness 800 to 1200 HV, finely ground and superfinished.
  • Tungsten carbide + PTFE layer 0.1 to 0.8 mm thick, roughness of 0.03 to 2.5 ⁇ m Ra, hardness 900 to 1400 HV, finely ground or not.
  • Stainless steel 0.1 to 2.5 mm thick, roughness from 0.5 to 1.5 ⁇ m Ra, hardness 28 to 42 HRC, finely ground.
  • Chrome plated 0.05 to 0.25 mm thick, roughness from 0.5 to 1.5 ⁇ m Ra, hardness 700 to 1200 HV, finely ground.
  • Crepe roll / suction press
  • Rubber 7 to 25 mm thick, roughness from 0.5 to 2.5 ⁇ Ra, hardness 78 to 85 Shore D, with or without blind holes, finely ground.
  • Poliurethane 10 to 25 mm thick, roughness of 0.5 to 2.5 ⁇ m Ra, hardness 4 to 200 P & J, with or without blind holes, with or without grooves and combination of blind holes and suction holes, finely ground.
  • Tungsten carbide 0.1 to 0.8 mm thick, roughness of 0.03 to 1, 0 ⁇ m Ra, hardness 900 to 1400 HV, finely ground and superfinished.
  • Chromium carbide 0.1 to 0.8 mm thick, roughness of 0.03 to 1.0 ⁇ m Ra, hardness 800 to 1200 HV, finely ground and superfinished.
  • Ni / Cr chromium carbide 0.1 to 0.8 mm thick, roughness of 0.03 to 1, 0 ⁇ m Ra, hardness 800 to 1200 HV, finely ground and superfinished.
  • tungsten carbide + PTFE layer 0.1 to 0.8mm thick, roughness of 0.03 to
  • Chromium plated 0.05 to 0.25 mm thick, roughness from 0.5 to 1.5 ⁇ m Ra, hardness 700 to 1200 HV.
  • polyester modified polyester, high-temperature polyamide, phenaphlape-based polyester, phenaphlape-based polymer, polyethylenetetalate polymer.
  • a material for the masking tape can also be provided: polyurethane, silicone rubber and the materials mentioned above to the backing roll.
  • the masking tape can also consist of embossed fabric.
  • a coating with nanoparticles can be provided to increase the wear resistance of all materials.
  • the invention also relates to a method for treating a fibrous web, in particular tissue paper web, with a device of the type described.
  • Fig. 1 shows a portion of a device according to the invention
  • FIG. 2 shows a variant of the device of FIG. 1.
  • the illustrated section of the inventive apparatus for treating a fibrous web 1, in particular tissue paper web comprises a forming roller 2, over which the fibrous web 1 is guided, and subsequently a pair of rollers 3, 4 with a shoe press roll 3 and a soft roller 4, between which a press nip 5 is formed is.
  • About guide rollers 6 is connected to the fibrous web.
  • a dewatering belt 7 is guided around the forming roller 2.
  • a dewatering belt 8 is guided through the press nip 5 with the fibrous web 1.
  • the dewatering belt 8 is also guided around deflection rollers 9 and together with the fibrous web 1 around the forming roller 2.
  • an inlet gap 10 is formed, in which pulp suspension is fed onto the forming roller 2 via a flow box 11.
  • a suction element 12 is also present, through which the fibrous web 1 is sucked against the dewatering belt 8.
  • nip 5 is located on the Softwalze 4 a masking tape 13, which is guided over deflection rollers 14.
  • a creping gap 15 is thereby formed between the creping belt 13 and the soft roller 4, which is delimited on the one hand by the surface 4 a of the soft roller 4 and on the other hand by the creping belt 13.
  • a doctor blade 16 and a suction device 17 is provided on the outlet side of the creping gap 15. The doctor blade 16 is not used here for creping but for cleaning the soft roller 4.
  • a roller 18 is arranged, which, together with a drying cylinder 19, in particular
  • Yankee cylinder forms another press nip 20.
  • a drying hood 21 is arranged on the drying cylinder 19.
  • a creping roll or suction press roll 22 may be arranged on the counter roller 4 opposite side of the masking tape 13.
  • a creping roll or suction press roll 22 may be arranged on the counter roller 4 opposite side of the masking tape 13.
  • Fig. 2 also another headbox is shown.
  • the variant of FIG. 2 agrees with the variant of FIG.
  • the material and / or the structure of the surface 4 a of the roller 4, which forms the web support surface for the fibrous web 1 in the creping gap 15, and the surface surfaces of the masking tape 13 are matched with respect to a reduction in the wear of the masking tape 13.
  • the vote is made so that a low coefficient of friction between the masking tape 13 and the surface 4 a of the roller 4 results.
  • the masking tape 13 may have humps of soft material, not shown here.
  • the hardness of the bumps can be between about 20 and about 120 Pussey & Jones.
  • As a material for the surface 4a of the roller 4 is in particular PTFE, so polytetrafluoroethylene into consideration.
  • the masking tape 13 may be made of TAD fabric or spiral-bonded fabric. It may also be permeable or non-permeable, woven or unwoven.
  • the press nip 20 on the drying cylinder 19 can also be designed as a creping gap. Then, a relative speed is set between the drying cylinder 19 and the masking tape 13.
  • the press nip 20 on the drying cylinder 19 may also be formed as a shoe press nip, and the counter roll 18 may also be formed as a suction press roll. Unlike the first crepe gap 15, the second creping gap 20 is thus formed as a press nip.
  • the counter roll 18 may also be formed as a soft press roll or as a hard press roll. However, the first crepe gap 15 can also be designed as a band press nip.
  • the masking tape 13 preferably has a tensile strength of at least 40 kN / m, in particular at least 50 kN / m, particularly preferably at least 60 kN / m.
  • the fibrous web 1 has, moreover, preferably a mass of about 15 g / m 2 to about 40 g / m 2 .

Landscapes

  • Paper (AREA)

Abstract

L'invention concerne un dispositif servant à traiter une bande de matière fibreuse (1), notamment pour produire une bande de papier de soie, et comprenant au moins une fente de crêpage qui est délimitée, d'une part, par un ruban de crêpage (13) et, d'autre part, par une surface d'appui de bande (4a) formée notamment par un contre-rouleau (4) et à travers laquelle la bande de matière fibreuse peut passer, une vitesse relative étant prévue entre le ruban de crêpage et la surface d'appui de bande. L'invention vise à obtenir un bon effet de crêpage tout en réduisant l'usure du ruban de crêpage. A cet effet, le matériau et/ou la structure de la surface d'appui de bande et de la surface du ruban de crêpage sont adaptés l'un à l'autre de manière à réduire l'usure du ruban de crêpage que provoque le fonctionnement du dispositif.
EP06819355A 2005-12-16 2006-11-09 Dispositif et procede pour traiter une bande de matiere fibreuse, notamment pour produire une bande de papier de soie Withdrawn EP1966437A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005060379A DE102005060379A1 (de) 2005-12-16 2005-12-16 Vorrichutng und Verfahren zur Behandlung einer Faserstoffbahn, insbesondere zur Herstellung einer Tissuepapierbahn
PCT/EP2006/068278 WO2007068540A1 (fr) 2005-12-16 2006-11-09 Dispositif et procede pour traiter une bande de matiere fibreuse, notamment pour produire une bande de papier de soie

Publications (1)

Publication Number Publication Date
EP1966437A1 true EP1966437A1 (fr) 2008-09-10

Family

ID=37668220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06819355A Withdrawn EP1966437A1 (fr) 2005-12-16 2006-11-09 Dispositif et procede pour traiter une bande de matiere fibreuse, notamment pour produire une bande de papier de soie

Country Status (4)

Country Link
US (1) US20080257514A1 (fr)
EP (1) EP1966437A1 (fr)
DE (1) DE102005060379A1 (fr)
WO (1) WO2007068540A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102005036075A1 (de) * 2005-08-01 2007-02-15 Voith Patent Gmbh Verfahren zur Herstellung von Tissuepapier
DE102005039015A1 (de) * 2005-08-18 2007-02-22 Voith Patent Gmbh Verfahren zur Herstellung von Tissuepapier
DE102005049502A1 (de) * 2005-10-13 2007-04-19 Voith Patent Gmbh Verfahren zur Herstellung von Tissuepapier
DE102005060378A1 (de) * 2005-12-16 2007-06-21 Voith Patent Gmbh Vorrichtung und Verfahren zur Behandlung einer Faserstoffbahn, insbesondere zur Herstellung einer Tissuepapierbahn
DE102006062237A1 (de) * 2006-12-22 2008-06-26 Voith Patent Gmbh Maschine zur Herstellung einer Faserstoffbahn
AT508331B1 (de) * 2009-05-19 2011-05-15 Andritz Ag Maschf Verfahren und vorrichtung zur behandlung einer faserstoffbahn in einer langnip-presseinheit
DE102010017648A1 (de) * 2010-06-29 2011-12-29 Papierwerke Lenk Ag Verfahren zur Herstellung von einseitig glattem Krepppapier
ITVE20130038A1 (it) * 2013-07-22 2015-01-23 Giorgio Trani Macchina e metodo per realizzare un nastro di materiale fibroso ad elevate estensibilita' longitudinale e trasveresale.

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DE4224729A1 (de) * 1992-07-27 1992-11-19 Voith Gmbh J M Abnahmevorrichtung der tissue-bahn vom tissue-zylinder
US6228216B1 (en) * 1998-07-10 2001-05-08 Kimberly-Clark Worldwide, Inc. Transfer of a cellulosic web between spaced apart transport means using a moving air as a support
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Also Published As

Publication number Publication date
DE102005060379A1 (de) 2007-06-21
US20080257514A1 (en) 2008-10-23
WO2007068540A1 (fr) 2007-06-21

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