EP1770209B1 - Procédé et dispositif pour la production d'une bande de papier tissu - Google Patents

Procédé et dispositif pour la production d'une bande de papier tissu Download PDF

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Publication number
EP1770209B1
EP1770209B1 EP06114192A EP06114192A EP1770209B1 EP 1770209 B1 EP1770209 B1 EP 1770209B1 EP 06114192 A EP06114192 A EP 06114192A EP 06114192 A EP06114192 A EP 06114192A EP 1770209 B1 EP1770209 B1 EP 1770209B1
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EP
European Patent Office
Prior art keywords
belt
fibrous web
structured
yankee cylinder
process according
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.)
Not-in-force
Application number
EP06114192A
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German (de)
English (en)
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EP1770209A1 (fr
Inventor
Luiz Carlos Silva
Thomas Scherb
Davilo Oyakawa
Rogerio Berardi
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Voith Patent GmbH
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Voith Patent GmbH
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Publication of EP1770209A1 publication Critical patent/EP1770209A1/fr
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Publication of EP1770209B1 publication Critical patent/EP1770209B1/fr
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    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/90—Papermaking press felts

Definitions

  • the invention relates to a method and an apparatus for producing a fibrous web, in particular tissue web.
  • Tissue paper ideally has a high absorbency or a high water absorption capacity in conjunction with a high tear resistance.
  • the absorbency and the water absorption capacity are essentially determined by the volume and porosity of the tissue paper.
  • tissue web In the production of tissue paper, the tissue web is passed in a final drying step over the surface of a heated Yankee drying cylinder before the finished product is creped from this. While the tissue web is passed over the Yankee drying cylinder, it is held by a string.
  • TAD Through-Air-Drying
  • the following table contains the usual values for some known parameters: ⁇ u> Table 1 ⁇ / u> Amount of roll coating material mg / m 2 ; mL / min Blade or scraper load kN / m conventional 1 - 3; 15 - 25 ⁇ 2.5 Tissue machine 2 - 3 TAD machines 5 - 15; 80 - 100 ⁇ 7.0 6-7
  • the invention has for its object to provide an improved method and an improved device of the type mentioned.
  • the aim is to ensure the highest possible quality of the tissue paper and at the same time to ensure that this high product quality can also be achieved with a smaller amount of coating material for the Yankee cylinder and a lower blade or scraper load.
  • the tissue web After the fibrous web is pressed in the press zone between the structural band and a circulating, unstructured, ie relatively smooth permeable support band, the tissue web can be brought into contact with the Yankee dryer cylinder with a relatively smooth side, while on the other hand due to the other railway side lying structural band only a part the fibrous or tissue web is pressed. In contrast to the conventional TAD machines, the tissue web can thus come into contact with the Yankee cylinder with approximately 100% surface area of the relevant side, while only a part of it is pressed.
  • the fibrous web When pressing the fibrous web in the press zone between the structural band and the circulating, unstructured, i. relatively smooth permeable support band, the fibrous web is preferably dewatered in the direction of the permeable support band.
  • the pressing pressure is preferably 1.5 bar or less.
  • the fibers are urged in the direction of the relatively flat or smooth surface of the supporting band, in particular formed by a dewatering band.
  • the drainage can be done for example by a correspondingly high vacuum and / or mechanically, for example by means of a tension band, through which the structural band, the fibrous web and the support band are pressed against a preferably smooth surface.
  • the relevant gas stream first flows through the permeable structural band, and then the fibrous web and then the preferably permeable support band.
  • the gas stream in question first flows through the fibrous web and then through the structured web.
  • the fibrous web thus does not receive a smooth surface in such a conventional TAD method.
  • the differential pressure generated in the conventional TAD method is relatively small.
  • the coating of the Yankee cylinder also ensures an improved transfer of the fibrous web from the structural band to the surface of the Yankee cylinder. Furthermore, by the coating the heat transfer from the Yankee cylinder to the fibrous web significantly improved. In addition, a blistering, a lifting of the web, etc. counteracted. After at least a portion of the coating is removed again by means of the scraper in question, no dirt can accumulate.
  • an adhesive coating material is preferably applied to the surface of the Yankee cylinder.
  • the amount of coating material continuously applied to the surface of the Yankee cylinder is in a range from about 3 to about 9 mg / m 2 .
  • a scraper or the like is advantageously loaded so as to give a line force in a range of about 3 to about 7 kN / m, preferably in a range of about 5 to about 6 kN / m.
  • the scrape load in question can thus be significantly reduced without any loss of quality.
  • the fibrous web is formed on a circumferential permeable structured band, thereby filling the recesses of the structured band with fibers instead of sucking the fibers of an already formed web into the recesses of the structure band as in a conventional TAD method.
  • a voluminous fibrous web is produced in comparison with the method in which a smoothly formed fibrous web is pressed into the depressions of a structural band.
  • the effect caused by the dewatering of the fibrous web in the press zone in the direction of the support band continues reinforced that almost 100% surface of the relevant side of the fibrous web can come into contact with the Yankee cylinder.
  • the pressing zone on the side adjacent to the support band is expediently delimited by an at least substantially smooth surface.
  • this smooth surface can be formed in particular by a rotating roller.
  • a gas stream is generated, which flows through the structural band, the fibrous web and the support band, wherein the gas stream preferably first flows through the structural band, then the fibrous web and finally the support band.
  • an air flow and / or vapor flow can be generated as gas flow.
  • the gas stream is generated at least partially by means of a suction zone of a rotating suction roll, which limits the pressing zone on the side adjacent to the support band.
  • the gas flow can be generated, at least partially, but also by means of a flat or curved suction box or the like, which limits the pressing zone on the side adjacent to the support belt.
  • an overpressure hood arranged on the side of the permeable structural band.
  • the overpressure hood may, for example, be a steam blower box.
  • the structural band, the fibrous web and the support band can advantageously also be pressed against an at least substantially smooth surface by means of a press belt under tension.
  • the smooth surface can in particular be formed again by a rotating roller.
  • a structured sieve is expediently used as a structural band.
  • a TAD sieve As a structural band, for example, a TAD sieve can be used.
  • the fibrous web is formed as previously described. In principle, however, it may also be expedient in certain cases to form the fibrous web in that the pulp suspension is sucked into the structure of the permeable structured strip by means of a suction device.
  • the support band may in particular be a drainage band.
  • the relatively recessed and the relatively elevated regions of the structural band are formed and arranged relative to each other that a maximum of 35% and preferably at most 25% of the structural band are pressed in the press nip.
  • An as gentle as possible pressing is achieved in that the provided on the Yankee press nip is a shoe press nip. If the fibrous web to be produced does not require bulkiness but should preferably achieve a high dry content with high production output, the press nip formed on the Yankee cylinder may alternatively be formed with a suction press roll or a press roll.
  • only one scraper is assigned to the Yankee cylinder, by which on the one hand at least a part of the coating is removed and on the other hand the fibrous web is creped and lifted off the cylinder surface.
  • the Yankee cylinder is assigned a first scraper for removing at least part of the coating and a second scraper, by means of which the fibrous web is creped and lifted off the cylinder surface.
  • the fibrous web removed again from the Yankee cylinder is then wound up.
  • a device for producing a fibrous web, in particular tissue web with a forming zone in which the fibrous web is formed on a circumferential permeable structured band, a press zone through which the fibrous web between the structural band and a circulating, not structured permeable support belt is passed lying, a tensioned press belt by means of which the structural band, the fibrous web and the support band are pressed against an at least substantially smooth surface, provided on a Yankee press nip, passed through the fibrous web together with the structural band With the fibrous web in the region of this press nip being transferred from the structural band to the surface of the Yankee cylinder, at least one scraper continuously scrape off the surface of the Yankee cylinder and a coating device, by which the Yankee cylinder is subsequently recoated so that in the press nip is always a renewed roller coating.
  • the coating device is controlled or regulated such that the amount of accelerating material continuously applied to the surface of the Yankee cylinder is in a range from about 3 to about 9 mg / m 2 .
  • a scraper is provided for continuously scraping the surface of the Yankee cylinder and for creping the fibrous web, which scraper is loaded so that a line force in a range of about 3 to about 7 kN / m, preferably in a range of about 5 to about 6 kN / m.
  • FIG. 1 shows a schematic representation of an exemplary embodiment of an apparatus 10 for producing a fibrous web, which in the present case is a tissue web.
  • a headbox 12 delivers a stock suspension jet into an inlet gap 14 which is formed in the region of a forming roller 16 between an inner circumferential permeable structured band 18 and an outer peripheral Formiersieb 20 which converge in the region of the forming roller 16 and are then guided together around this forming roller 16 ,
  • the structural band 18 may in particular be a three-dimensionally structured sieve.
  • the Formiersieb 20 has the tissue web 22 facing a relative to the respective side of the structural band 18 relative smooth side.
  • tissue web 22 facing side of the structural band 18 has recessed areas and relatively elevated areas, wherein the tissue web 22 is formed in these recessed and elevated areas of the structural band 18.
  • the structural band 18 may be formed, for example, by a TAD screen.
  • the tissue web 22 is substantially dewatered by the outer forming wire 20. Subsequently, the forming fabric 20 in the region of a deflection roller 24 is again separated from the tissue web 22, which is guided together with the structure band 18 on to a pressing zone 26, in which the tissue web 22 between the structural band 18 and a circumferential, non-structured permeable support band 28 lying is pressed.
  • the permeable support belt 28 may in particular be a felt.
  • pressure is exerted on the structure band 18, the tissue web 22 and the support band 28 in such a way that the tissue web 22 is dewatered in the direction of the support band 28 formed, for example, by a felt.
  • the tissue web 22 in the press zone 26 is dewatered in the direction of the permeable support belt 28 and the structural band 18 passed through this press zone 26 is identical to the structural band on which the tissue web 22 has been formed, the bulky portions of the tissue web 22 are less compressed than the less bulky sections, so that, as a result, the voluminous structure of the respective bulkier sections is preserved.
  • the dewatering pressure for the tissue web 22 in the press zone 26 is generated at least in sections simultaneously by a gas flow and by a mechanical pressing force.
  • the gas stream first flows through the structure band 18, then the tissue web 22 and finally the permeable support band 28.
  • the gas flow is generated in the present case by a suction zone 30 of a suction roll 32.
  • the alternatively or additionally applied mechanical force is generated by guiding the structure band 18, the tissue web 22 and the support band 28 in the press zone 26 between a tensioned press belt 34 and a smooth surface, which is formed here by the roller 32, for example ,
  • the pressing zone 26 is at least substantially defined by the wrap area of the press belt 34 around the lateral surface of the suction roll 32, wherein this wrap is determined by the distance between the two guide rollers 36, 38.
  • the tissue web 22 In the area 40, through which the tissue web 22 is guided together with the structural band 18, the tissue web 22 can be subjected to at least one further drying step.
  • the tissue web 22 is guided together with the structural band 18 by a press nip 44 formed on a drying cylinder, namely a Yankee cylinder 42.
  • a press nip 44 formed on a drying cylinder, namely a Yankee cylinder 42.
  • the tissue web 22 lies in this press nip 44 between the structure band 18 and the smooth surface of the Yankee cylinder 42.
  • the press nip 44 is formed in the present case by a shoe press nip.
  • the Yankee cylinder 42 is thus assigned a shoe press unit, here a shoe press roll 46, for forming the press nip 44.
  • a shoe press roll 46 for forming the press nip 44.
  • the Yankee cylinder 42 may be associated with a hood 6262.
  • the tissue web 22 formed between the structural band 18 and the relatively smooth forming fabric 20 Because the tissue web has been formed between the structural band 18 and the relatively smooth forming fabric 20, only the side of the tissue web 22 formed on the structure band 18 has a wavy surface. In contrast, the surface of the tissue web 22 formed on the smooth forming fabric 20 is relatively smooth. With this smooth side, the tissue web 22 in the press nip 44 now comes into contact with the surface of the Yankee cylinder 42. The tissue web 22 thus touches the Yankee cylinder with a relatively large area.
  • the structural band 18 passed through the press nip 44 is identical to the structural band on which the tissue web 22 has been formed, it is ensured that the voluminous regions of the tissue web 22 are practically not pressed in this press nip 44 either. In contrast, the less bulky areas of the tissue web 22 are pressed, whereby the strength of the tissue web 22 is further increased.
  • the structure band 18 is separated from the tissue web 22, which is guided on the Yankee cylinder 42 as far as a scraper 48, whereby the tissue web 22 is creped and lifted off the Yankee cylinder 42. Subsequently, the tissue web 22 is fed to a take-up unit 50, in which it is wound up by means of a pressure roller 52 into a winding 54.
  • the tissue web 22 is therefore transferred in the region of the press nip 44 from the structure band 18 onto the surface of the Yankee cylinder 42.
  • the surface of the Yankee cylinder 42 is scraped off continuously, for example by means of the scraper 48, and subsequently coated again by means of a coating device 56, so that a renewed coating is always present in the press nip 44.
  • an adhesive coating material can be applied to the surface of the Yankee cylinder 42.
  • the amount of coating material continuously applied to the surface of the Yankee cylinder 42 is suitably in a range of about 3 to about 9 mg / m 2 .
  • a scraper or the like, here, for example, the tissue web creping scrapers 48 may be loaded so that a line force in a range from about 3 to about 7 kN / m, preferably in one Range of about 5 to about 6 kN / m.
  • an air stream and / or vapor stream can be generated in particular.
  • the gas stream can also be generated at least partially by means of an overpressure hood 58 arranged on the side of the permeable structure strip 18.
  • a structured sieve for example a TAD sieve, can be used in particular as a structural band 18.
  • a drainage band can be provided.
  • the relatively recessed regions and the relatively elevated regions of the structure band 18 are preferably designed and arranged relative to one another such that a maximum of 35% and preferably not more than 25% of the structural band 18 is pressed in the press nip 44 formed with the Yankee cylinder 42.
  • FIG. 2 shows an enlarged view of a portion of the Yankee cylinder 42, which is associated with the coating device 56 and a scraper 48 through continuously removed at least a portion of the applied coating 60 again.
  • FIG. 3 shows one with the FIG. 2 Comparable partial schematic representation of the Yankee cylinder 42 with a single associated scraper 48, scraped by the one hand, the surface of the Yankee cylinder 42 and at least a portion of the applied coating is removed again, and by the other hand, the tissue web 22 creped and the Yankee Cylinder 42 is lifted.
  • FIG. 4 shows one with the FIG. 3 However, in the present case, two scrapers 48 ', 48 "are associated with the Yankee cylinder 42.
  • a first scraper 48' serves to crepe the fibrous web 22 and from the cylinder surface
  • the second scraper 48 " at least a portion of the coating 60, including dirt accumulated on the cylinder surface, is removed.

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Claims (45)

  1. Procédé pour fabriquer une bande de matière fibreuse (22), en particulier une bande de papier essuie-tout, comprenant les étapes suivantes:
    a) on presse la bande de matière fibreuse (22) en la soutenant dans une zone de presses (26) entre une bande structurée perméable en mouvement (18) et une bande de support perméable non structurée en mouvement (28),
    b) on presse la bande structurée (18), la bande de matière fibreuse (22) et la bande de support (28) contre une surface au moyen d'une bande de pressage (34) se trouvant sous contrainte,
    c) on envoie la bande de matière fibreuse (22) et la bande structurée (18) à une fente de pressage (44) prévue sur un cylindre frictionneur (42),
    d) on transfère la bande de matière fibreuse (22) de la bande structurée (18) sur la surface du cylindre frictionneur (42) dans la région de la fente de pressage (44),
    e) on racle en continu la surface du cylindre frictionneur (42) et on lui applique ensuite un nouveau revêtement, de telle manière qu'un revêtement sans cesse renouvelé soit présent dans la fente de pressage (44).
  2. Procédé selon la revendication 1, caractérisé en ce que l'on applique un matériau de revêtement adhésif sur la surface du cylindre frictionneur (42).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la quantité de matériau de revêtement appliquée en continu sur la surface du cylindre frictionneur (42) se situe dans une plage d'environ 3 à environ 9 mg/m2.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que, pour le raclage continu de la surface du cylindre frictionneur (42) et pour le crêpage de la bande de matière fibreuse (22), on charge un racloir (48, 48") ou analogue de telle manière qu'il en résulte une force linéaire comprise dans une plage d'environ 3 à environ 7 kN/m.
  5. Procédé selon la revendication 4, caractérisé en ce que, pour le raclage continu de la surface du cylindre frictionneur (42), on charge un racloir (48, 48") ou analogue de telle manière qu'il en résulte une force linéaire comprise dans une plage d'environ 5 à environ 6 kN/m.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on forme la bande de matière fibreuse (22) sur une bande structurée perméable en mouvement (18).
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on produit dans la région de la zone de presses (26) un courant de gaz, qui traverse la bande structurée (18), la bande de matière fibreuse (22) et la bande de support (28).
  8. Procédé selon la revendication 7, caractérisé en ce que le courant de gaz traverse d'abord la bande structurée (18) puis la bande de matière fibreuse (22) et enfin la bande de support (28).
  9. Procédé selon la revendication 7 ou 8, caractérisé en ce que l'on produit comme courant de gaz un courant d'air et/ou un courant de vapeur.
  10. Procédé selon l'une quelconque des revendications 7 à 9, caractérisé en ce que l'on produit le courant de gaz au moins en partie au moyen d'une zone d'aspiration (30) d'un rouleau aspirant rotatif (32), qui limite la zone de presses (26) sur le côté voisin de la bande de support (28).
  11. Procédé selon l'une quelconque des revendications 7 à 10, caractérisé en ce que l'on produit le courant de gaz au moins en partie au moyen d'un caisson aspirant plan ou courbe, qui limite la zone de presses (26) sur le côté voisin de la bande de support (28).
  12. Procédé selon l'une quelconque des revendications 7 à 11, caractérisé en ce que l'on produit le courant de gaz au moins en partie au moyen d'une hotte en surpression (58) disposée sur le côté de la bande structurée perméable.
  13. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on utilise une toile structurée comme bande structurée (18).
  14. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on utilise une toile TAD comme bande structurée (18).
  15. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on forme la bande de matière fibreuse (22) par aspiration de la suspension de matière fibreuse au moyen d'un dispositif d'aspiration dans la structure de la bande structurée perméable (18).
  16. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on utilise une bande d'essorage comme bande de support (28).
  17. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on réalise les régions relativement creuses et les régions relativement surélevées de la bande structurée (18) et on les dispose les unes par rapport aux autres de telle manière qu'au maximum 35 % et de préférence au maximum 25 % de la bande structurée (18) soient pressés dans la fente de pressage (44).
  18. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la fente de pressage (44) prévue sur le cylindre frictionneur (42) est une fente de presse à sabot.
  19. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on associe au cylindre frictionneur uniquement un racloir (48), au moyen duquel d'une part on enlève au moins une partie du revêtement (60) et d'autre part on crêpe la bande de matière fibreuse (22) et on l'enlève de la surface du cylindre.
  20. Procédé selon l'une quelconque des revendications 1 à 18, caractérisé en ce que l'on associe au cylindre frictionneur (42) un premier racloir (48') au moyen duquel on crêpe la bande de matière fibreuse (22) et on l'enlève de la surface du cylindre, et un deuxième racloir (48") pour enlever au moins une partie du revêtement (60).
  21. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on soumet à une lame d'air l'angle rentrant de sortie formé à la sortie de la fente de pressage (44) entre la bande de matière fibreuse (22) et la bande structurée (18).
  22. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on soumet à une lame d'air l'angle rentrant de sortie entre la bande structurée (18) et le rouleau opposé (46), dans la région dans laquelle la bande structurée (18) quitte un rouleau opposé (46) formant la fente de pressage (44) avec le cylindre frictionneur (42).
  23. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on enroule ensuite la bande de matière fibreuse (22) de nouveau reprise du cylindre frictionneur (42).
  24. Dispositif (10) pour fabriquer une bande de matière fibreuse (22), en particulier une bande de papier essuie-tout, avec une zone de formation de feuilles, dans laquelle la bande de matière fibreuse (22) est formée sur une bande structurée perméable en mouvement (18), avec une zone de presses (26), à travers laquelle la bande de matière fibreuse (22) est conduite en étant soutenue entre la bande structurée (18) et une bande de support perméable non structurée en mouvement (28), avec une bande de pressage (34) se trouvant sous contrainte, au moyen de laquelle la bande structurée (18), la bande de matière fibreuse (22) et la bande de support (28) peuvent être pressées contre une surface, avec une fente de pressage (44) prévue sur un cylindre frictionneur (42), à travers laquelle la bande de matière fibreuse est conduite en même temps que la bande structurée (18), dans lequel la bande de matière fibreuse (22) est transférée dans la région de cette fente de pressage (44) de la bande structurée (18) sur la surface du cylindre frictionneur (42), avec au moins un racloir (48, 48"), qui racle en continu la surface du cylindre frictionneur (42), et avec un dispositif de revêtement (56), au moyen duquel le cylindre frictionneur (42) est ensuite de nouveau doté d'un nouveau revêtement, de telle manière qu'un revêtement de rouleau sans cesse renouvelé soit présent dans la fente de pressage (44).
  25. Dispositif selon la revendication 24, caractérisé en ce qu'un matériau de revêtement adhésif (60) peut être appliqué sur la surface du cylindre frictionneur (42) au moyen du dispositif de revêtement (56).
  26. Dispositif selon la revendication 24 ou 25, caractérisé en ce que le dispositif de revêtement (56) est commandé ou régulé de telle manière que la quantité de matériau de revêtement (60) appliquée en continu sur la surface du cylindre frictionneur (42) se situe dans une plage d'environ 3 à environ 9 mg/m2.
  27. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu un racloir (48, 48") pour le raclage continu de la surface du cylindre frictionneur (42) et ce racloir (48, 48") est chargé de telle manière qu'il en résulte une force linéaire comprise dans une plage d'environ 3 à environ 7 kN/m.
  28. Dispositif selon la revendication 27, caractérisé en ce que le racloir (48, 48") est chargé de telle manière qu'il en résulte une force linéaire comprise dans une plage d'environ 5 à environ 6 kN/m.
  29. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu des moyens (30, 32, 58) pour produire dans la région de la zone de presses (26) un courant de gaz, qui traverse la bande structurée (18), la bande de matière fibreuse (22) et la bande de support (28).
  30. Dispositif selon la revendication 29, caractérisé en ce que le courant de gaz traverse d'abord la bande structurée (18), puis la bande de matière fibreuse (22) et enfin la bande de support (28).
  31. Dispositif selon la revendication 29 ou 30, caractérisé en ce qu'il est prévu des moyens (30, 32, 58) pour produire un courant d'air et/ou pour produire un courant de vapeur.
  32. Dispositif selon l'une quelconque des revendications 29 à 31, caractérisé en ce que les moyens pour produire un courant de gaz comprennent un rouleau aspirant rotatif (32) muni d'une zone d'aspiration (30), et qui limite la zone de presses (26) sur le côté voisin de la bande de support (28).
  33. Dispositif selon l'une quelconque des revendications 29 à 31, caractérisé en ce que les moyens pour produire un courant de gaz comprennent un caisson aspirant plan ou courbe, qui limite la zone de presses (26) sur le côté voisin de la bande de support (18).
  34. Dispositif selon l'une quelconque des revendications 29 à 33, caractérisé en ce que les moyens pour produire un courant de gaz comprennent une hotte en surpression (58) disposée sur le côté de la bande structurée perméable (18).
  35. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu une toile structurée comme bande structurée (18).
  36. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu une toile TAD comme bande structurée (18).
  37. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend une zone de formation de feuilles avec un dispositif d'aspiration, dans lequel la suspension de matière fibreuse peut être aspirée au moyen du dispositif d'aspiration dans la structure de la bande structurée perméable (18) pour former la bande de matière fibreuse (22).
  38. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu une bande d'essorage comme bande de support (28).
  39. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les régions relativement creuses et les régions relativement surélevées de la bande structurée (18) sont réalisées et disposées les unes par rapport aux autres de telle manière qu'au maximum 35 % et de préférence au maximum 25 % de la bande structurée (18) soient pressés dans la fente de pressage (44).
  40. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la fente de pressage (44) prévue sur le cylindre frictionneur (42) est formée par une fente de presse à sabot.
  41. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un seul racloir (48) est associé au cylindre frictionneur (42), au moyen duquel d'une part on enlève au moins une partie du revêtement (60) et d'autre part on crêpe la bande de matière fibreuse (22) et on l'enlève de la surface du cylindre.
  42. Dispositif selon l'une quelconque des revendications 24 à 40, caractérisé en ce qu'au cylindre frictionneur (42) est associé un premier racloir (48'), au moyen duquel on crêpe la bande de matière fibreuse (22) et on l'enlève de la surface du cylindre, et un deuxième racloir (48") pour enlever au moins une partie du revêtement (60).
  43. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu une lame d'air destinée à agir sur l'angle rentrant de sortie se formant à la sortie de la fente de pressage (44) entre la bande de matière fibreuse (22) et la bande structurée (18).
  44. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est prévu une lame d'air, destinée à agir sur l'angle rentrant de sortie entre la bande structurée (18) et le rouleau opposé (46), dans la région où la bande structurée (18) quitte le rouleau opposé (46) formant la fente de pressage (44) avec le cylindre frictionneur (42).
  45. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la bande de matière fibreuse (22) de nouveau reprise du cylindre frictionneur (42) est envoyée à un dispositif d'enroulement (50).
EP06114192A 2005-09-30 2006-05-19 Procédé et dispositif pour la production d'une bande de papier tissu Not-in-force EP1770209B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005046903A DE102005046903A1 (de) 2005-09-30 2005-09-30 Verfahren und Vorrichtung zur Herstellung einer Tissuebahn

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EP1770209A1 EP1770209A1 (fr) 2007-04-04
EP1770209B1 true EP1770209B1 (fr) 2011-12-14

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EP06114192A Not-in-force EP1770209B1 (fr) 2005-09-30 2006-05-19 Procédé et dispositif pour la production d'une bande de papier tissu

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US (2) US7582187B2 (fr)
EP (1) EP1770209B1 (fr)
AT (1) ATE537297T1 (fr)
DE (1) DE102005046903A1 (fr)

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Publication number Publication date
US7905989B2 (en) 2011-03-15
ATE537297T1 (de) 2011-12-15
EP1770209A1 (fr) 2007-04-04
US20070074835A1 (en) 2007-04-05
US7582187B2 (en) 2009-09-01
US20090242158A1 (en) 2009-10-01
DE102005046903A1 (de) 2007-04-05

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