EP2576895B1 - Machine, procede et application d'une machine pour produire une bande de papier, en particulier une bande de papier pour sac - Google Patents

Machine, procede et application d'une machine pour produire une bande de papier, en particulier une bande de papier pour sac Download PDF

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Publication number
EP2576895B1
EP2576895B1 EP11722392.5A EP11722392A EP2576895B1 EP 2576895 B1 EP2576895 B1 EP 2576895B1 EP 11722392 A EP11722392 A EP 11722392A EP 2576895 B1 EP2576895 B1 EP 2576895B1
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EP
European Patent Office
Prior art keywords
press
section
smoothing
paper web
roll
Prior art date
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Active
Application number
EP11722392.5A
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German (de)
English (en)
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EP2576895A2 (fr
Inventor
Georg Bacovsky
Wolfgang Schwarz
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Voith Patent GmbH
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Voith Patent GmbH
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Publication date
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Publication of EP2576895A2 publication Critical patent/EP2576895A2/fr
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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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/30—Disc mills
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/022—Means for injecting material into flow within the headbox
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/18—Shaking apparatus for wire-cloths and associated parts
    • D21F1/20—Shaking apparatus for wire-cloths and associated parts in Fourdrinier machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod

Definitions

  • the invention relates to a machine for producing a compressed or non-compressed sack paper web having a headbox, a wire section, a press section, a dryer section and a take-up unit. Furthermore, the invention relates to a method and a use according to the preambles of claims 10 and 14.
  • Sack paper also called sack kraft paper
  • Sack paper is made from pulp fibers, mainly from long fiber pulp, as this results in a high strength and a high porosity of the paper.
  • From sack paper bags are e.g. for the packaging of cement or other powdered products.
  • Important properties of the sack paper are high strength with sufficient elongation, high porosity and sufficient rigidity. These properties are not only necessary because of the load on the bags during transport, but also because of the filling of the bags. This should happen as quickly as possible and not only a high strength and elasticity is required, but also a high porosity or air permeability. So much air can escape during filling from the empty bag through the sack paper.
  • the bag would burst or it would escape a lot of dust by the outflow of air through the filling.
  • one side of the paper web, the later outer side of the bag should always be easier to print, which requires a higher degree of smoothness.
  • Known machines for the production of sack paper have a headbox which evenly distributes the fiber suspension over the width, namely on or between the wires in the wire section.
  • the sheet or the web is formed by dewatering the suspension on a forming fabric or between two forming fabrics.
  • the paper machine has a plurality of wire sections, each with associated headboxes, each forming a layer as a separate web. After sheet formation in the wire section, the web is dewatered in a press section with several press nips so far that a dry content of about 40% is achieved.
  • the individual webs from the wire sections are brought together one above the other and in the press section together marautscht to a multi-layer paper web.
  • the press section is designed as a so-called central roller press, in which two of the three press nips are formed with a common central roller.
  • the dryer section follows, in which the paper web is passed over heated cylinders and thus dried.
  • a known compression device is for example the so-called Clupak device.
  • the paper web is guided together with a thicker elastic band over a drying cylinder or another roller. At least one point on the circumference of the drying cylinder, the paper web and the strip are guided through a gap which is formed by a pressure roll or a pressing element and which is narrower than the thickness of the elastic strip.
  • the elastic band and with it the paper web are thereby compressed in the running direction.
  • the cover by the band prevents the web from being creped visibly.
  • the compression increases the later extensibility of the sack paper.
  • the documents WO 98/54404 and DE 10 2004 036 276 A1 discloses a press section of a machine for producing a paper web with only one press nip.
  • the press nip is formed by a shoe roll and a counter roll.
  • the document US 3,327,952 discloses a method of making fibrous material for the production of paper and board. It is intended to treat a suspension with high consistency in a grinder with two opposing grinding elements. The distance between these grinding elements is half the mean fiber length of the fibers in the suspension.
  • the document DE 199 26 805 A1 describes a method and a headbox for metering an additional fluid into the suspension to produce a paper web.
  • the shoe calender roll has a flexible coat that sticks over one on top of the other extending yoke supporting, hydraulically pressed shoe is guided. As a result, a longer smooth nip is produced at a reduced pressure compared to the conventional calender. Nevertheless, the porosity of the sack paper produced in this way is significantly lower than that of sack paper that was produced on a machine without any calendering. The result is that the filling properties of the bag are still deteriorated compared to the conventional quality. In known machines, therefore, a compromise between improved printability and good filling properties will always be required.
  • the object of the invention is to develop a machine for the production of sack paper so that improved printability of the sack paper is achieved without impairing the use or filling properties.
  • the smoothness of the sack paper web should be increased without the porosity being reduced too much.
  • the counter roll has a cylindrical
  • the jacket and the shoe press roll have a flexible jacket, which is guided over a hydraulically pressed press shoe which is supported on a fixed yoke.
  • longer press nips can be produced than with a roll nip, which leads to an increase in the dry content after the press section.
  • Another advantage of the press section with only a single press nip is that the paper web no longer has to be transferred between the various press nips, which form several drive groups, and thus also less loses elasticity. This has an additional positive effect on the use and filling properties of the bags.
  • the press section with only one press nip also reduces the energy required to drive the machine and reduces maintenance and repair costs.
  • a calender in a preferred machine, can be present, the calender should contain only a single smoothing nip.
  • the wet paper web in the press is much more compressible than the dried paper web after the dryer section, more volume and porosity in the press can thus be obtained by only one nip than by densification in the single nip of the calender joining the dryer section , again reduced.
  • the smoothness of the surface can be significantly improved
  • the single press nip is designed as a shoe press nip, double felted.
  • the dewatering performance and thus the dry content of the paper web is further increased since water from the paper web can be pressed out via the upper and lower side into the respective press felts.
  • the paper web no longer has to be removed from a smooth press roll or a smooth, water-impermeable press belt to which it adheres, which additionally increases its remaining elasticity. Due to the higher dry content, the tension, ie the difference in speed between the press section and the dryer section, can be reduced, which likewise increases the extensibility in the direction of travel and the transverse strength to the direction of travel in the paper web.
  • the length of the shoe press nip in the web running direction is at least 220 mm, preferably at least 270 mm. At a high length, the residence time in the press nip increases, thereby improving drainage.
  • the machine according to the invention can be further improved in that the calender is designed as a shoe caliper with an extended smoothing nip formed by a heatable smoothing roll and a shoe calendering roll.
  • the smoothing roll has a cylindrical shell
  • the shoe press roll has a flexible shell, which is guided over a supported on a fixed yoke, hydraulically pressed shoe.
  • the extended smooth nip leads to a gentler smoothing and thus to less compaction.
  • the heatable smoothing roller may be the lower roller in the calender.
  • the underside of the paper web which is usually the smoother side already out of the wire section, comes into contact with the heatable smoothing roll, which has a stronger smoothing effect than the shoe-smoothing roll.
  • a compression device may be present within the dryer section, in which the paper web is compressed against the direction of travel at a dry content of between 60% and 80%.
  • the stretchability of the paper web measured as elongation at break is increased by 5-15%.
  • the paper machine preceded in the process flow is a stock preparation, in which the fiber suspension is treated in various apparatuses, before they then fed via the machine chest as temporary storage the headbox becomes.
  • One type of apparatus for the mentioned treatment are refiner.
  • the fiber suspension is passed in the narrow gap between two discs which rotate relative to each other.
  • the discs are provided with surface structures having ribs or edges.
  • the aim of the treatment is, for example, to shorten the fibers or to fibrillate their surface by the shearing stress in the gap.
  • An improvement in paper properties can furthermore be achieved if high-consistency refiners, which treat the paper stock at a solids concentration in the treated suspension of between 25 and 40%, are present in a stock preparation according to the invention. This also increases the strength of the paper web formed later.
  • the stock suspension may be treated in low consistency refiners at a solids concentration between 3 and 5% before being fed to the machine chest from which the machine is supplied.
  • a disadvantage of the refining treatment, namely that it also reduces the porosity of the paper web produced is avoided by the press section with only a single press nip, which causes a lower compression than on conventional paper machines.
  • At least one headbox of the machine according to the invention is equipped with means for dilution water control, as for example EP 1236828 A1 are known.
  • the possibility is provided to be able to regulate the throughput, the solids density and thus the basis weight and the fiber orientation in sections over the width in zones.
  • the cross-section of the weight per unit area of the paper web is regulated by feeding more water into the corresponding zone at heavy points in or in front of the headbox, and thus the consistency in the suspension in this zone is reduced. If it's too light it's the other way around. Due to the thus improved basis weight cross profile of the paper web, a more uniform porosity, strength and extensibility of the sack paper is achieved over the width of the paper web.
  • Fig.1 a machine for producing single-ply sack paper is shown. Over the headbox (1), the stock suspension is distributed evenly across the width on the forming fabric.
  • the wire section (2) is designed here as a wire screening section, ie the suspension is dewatered only through a forming fabric towards the bottom.
  • a twin-wire former would also be possible in which the suspension is applied between two forming fabrics and is dewatered on both sides (top and bottom).
  • the wire section shown is equipped with a Sieb thoroughlyelvorraum (8), which moves the screen in the transverse direction quickly back and forth.
  • the press section (3) has only a single shoe press nip, which is formed by a counter-roller and a shoe press roll (9).
  • the shoe press roll (9) is above and the counter roll below.
  • the shoe press nip is double felted with an endless top felt and an endless underfelt.
  • the paper web is removed by a suction roll from the forming fabric and transferred to the top felt.
  • the web is transferred after the press section by a suction roll, from the lower felt to the drying wire of the first drying group.
  • the dryer section (FIGS. 4A and 4B) consists of a plurality of dryer groups, with the front dryer groups in the exemplary machine being single-row and the dryer group arranged further back in two rows.
  • a drying group is characterized in that all cylinders and rollers form a drive group therein.
  • Single-row dryer groups consist of a series of heatable cylinders and a number of guide rollers, which can be acted upon by vacuum, wherein the web is guided together with an endlessly circulating drying wire in alternation on the cylinders and the guide rollers.
  • Double-row dryer groups have an upper and a lower row of heatable cylinders over which the web is alternately guided.
  • An upper dryer wire successively wraps around the cylinders of the upper row and a lower dryer wire successively wraps around the cylinders of the lower row.
  • an upsetting device 5 is provided in the illustrated embodiment, which is embodied as a so-called Clupak unit with an elastic band 10.
  • a calender 6 follows with a shoe-smoothing nipple The calender provides improved printability by increasing the smoothness, particularly of the underside, The sack paper web (12) is then placed in the final roll-up unit (7 ) wound up.

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  • Paper (AREA)

Claims (14)

  1. Machine pour produire une bande de papier pour sac crêpé ou non crêpé (12), qui comprend une caisse de tête (1), une section humide (2), une section de presses (3), une section de séchage (4A et 4B) et une unité d'enroulement (7), caractérisée en ce que la section de presses (3) ne se compose que d'une seule emprise de presse, qui est réalisée sous la forme d'une emprise de presse à sabot, qui est formée par un rouleau opposé et un rouleau de presse à sabot (9), et la longueur de l'emprise de presse à sabot dans la direction de défilement de la bande vaut au moins 220 mm, de préférence au moins 270 mm.
  2. Machine selon la revendication 1, caractérisée en ce qu'elle comporte une lisseuse (6) et en ce que celle-ci ne présente qu'une seule emprise de lissage.
  3. Machine selon la revendication 1 ou 2, caractérisée en ce que l'emprise de presse dans la section de presses (3) est garnie de deux toiles, la bande de papier étant guidée à travers l'emprise de presse entre la toile supérieure et la toile inférieure.
  4. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que la lisseuse (6) est réalisée sous la forme d'une lisseuse à sabot avec une emprise de lissage allongée, qui est formée par un rouleau de lissage chauffant et un rouleau de lissage à sabot (11).
  5. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu un rouleau de lissage chauffant dans une lisseuse (6) et en ce que celui-ci est le rouleau inférieur dans la lisseuse.
  6. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il se trouve un dispositif de crêpage (5) à l'intérieur de la section de séchage, dans lequel la bande de papier est crêpée en sens inverse de la direction de défilement avec un degré de siccité compris entre 60 % et 80 %.
  7. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il se trouve dans la partie humide (2) un dispositif de secouage de toile (8), qui déplace une toile de formage en va-et-vient essentiellement transversalement à la direction de défilement.
  8. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il se trouve, dans une préparation des matières appartenant à la machine, qui se trouve dans le processus avant la caisse de tête (1) de la machine, des raffineurs à haute consistance, qui traitent la matière de type papier, notamment avec une concentration de matières solides comprise entre 25 et 40 %.
  9. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins une caisse de tête (1) est équipée d'une régulation de l'eau de dilution.
  10. Procédé pour produire une bande de papier pour sac crêpé ou non crêpé (12) avec une machine qui comprend une caisse de tête (1), une partie humide (2), une section de presses (3), une section de séchage (4A et 4B) et une unité d'enroulement (7), caractérisé en ce que l'on presse la bande de papier dans une section de presses (3), qui ne se compose que d'une seule emprise de presse, qui est réalisée sous la forme d'une emprise de presse à sabot, qui est formée par un rouleau opposé et un rouleau de presse à sabot (9), et la longueur de l'emprise de presse à sabot dans la direction de défilement de la bande vaut au moins 220 mm, de préférence au moins 270 mm.
  11. Procédé selon la revendication 10, caractérisé en ce que l'on guide la bande de papier à travers une lisseuse (6), et en ce que celle-ci ne se compose que d'une seule emprise de lissage.
  12. Procédé selon l'une des revendications 10 à 11, caractérisé en ce que l'on guide la bande de papier à travers la lisseuse (6), qui est réalisée sous la forme d'une lisseuse à sabot avec une emprise de lissage allongée, qui est formée par un rouleau de lissage chauffant et un rouleau de lissage à sabot (11).
  13. Procédé selon l'une des revendications 10 à 12, caractérisé en ce que l'on essore la bande de panier dans la partie humide (2) et en ce qu'il se trouve dans celle-ci un dispositif de secouage de toile (8), qui déplace une toile de formage en va-et-vient essentiellement transversalement à la direction de défilement.
  14. Utilisation d'une machine pour produire une bande de papier pour sac crêpé ou non crêpé (12), qui comprend une caisse de tête (1), une partie humide (2), une section de presses (3), une section de séchage (4A et 4B) et une unité d'enroulement (7), caractérisée en ce que la section de presses (3) ne se compose que d'une seule emprise de presse, qui est réalisée sous la forme d'une emprise de presse à sabot, qui est formée par un rouleau opposé et un rouleau de presse à sabot (9) et en ce que la longueur de l'emprise de presse à sabot dans la direction de défilement de la bande vaut au moins 220 mm, de préférence au moins 270 mm.
EP11722392.5A 2010-06-01 2011-05-25 Machine, procede et application d'une machine pour produire une bande de papier, en particulier une bande de papier pour sac Active EP2576895B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010029580 DE102010029580A1 (de) 2010-06-01 2010-06-01 Maschine zur Herstellung einer Papierbahn insbesondere Sackpapierbahn
PCT/EP2011/058557 WO2011151239A2 (fr) 2010-06-01 2011-05-25 Machine pour produire une bande de papier, en particulier une bande de papier pour sac

Publications (2)

Publication Number Publication Date
EP2576895A2 EP2576895A2 (fr) 2013-04-10
EP2576895B1 true EP2576895B1 (fr) 2014-10-01

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ID=44119246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11722392.5A Active EP2576895B1 (fr) 2010-06-01 2011-05-25 Machine, procede et application d'une machine pour produire une bande de papier, en particulier une bande de papier pour sac

Country Status (4)

Country Link
EP (1) EP2576895B1 (fr)
CN (1) CN103097608B (fr)
DE (1) DE102010029580A1 (fr)
WO (1) WO2011151239A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2752200C1 (ru) * 2019-12-12 2021-07-23 Фойт Патент Гмбх Машина и способ для изготовления полотна волокнистого материала
EP4400647A1 (fr) * 2023-01-16 2024-07-17 Billerud Aktiebolag (publ) Papier extensible

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DE102012218679A1 (de) * 2012-10-12 2014-04-17 Storopack Hans Reichenecker Gmbh Vorrichtung zur Herstellung eines Polsters aus Papier
HUE030487T2 (en) * 2014-07-04 2017-05-29 Billerudkorsnaes Ab Coated sack paper
EP3224409B1 (fr) * 2014-11-28 2021-08-18 Voith Patent GmbH Procédé et dispositif de fabrication de papier d'emballage
EP3088606A1 (fr) * 2015-04-29 2016-11-02 BillerudKorsnäs AB Papier d'ensachage brun désintégrable
DE102015223663A1 (de) * 2015-11-30 2017-06-01 Voith Patent Gmbh Vorrichtung zur herstellung einer faserstoffbahn
DE102015223664A1 (de) * 2015-11-30 2017-06-01 Voith Patent Gmbh Vorrichtung und verfahren zur herstellung einer faserstoffbahn
EP3385442B1 (fr) 2017-04-06 2019-04-24 BillerudKorsnäs AB Procédé de production d'un papier hautement étirable
CN106988150B (zh) * 2017-05-23 2019-06-25 东莞市白天鹅纸业有限公司 一种生活用纸造纸机
DE102018119686A1 (de) * 2018-08-14 2020-02-20 Voith Patent Gmbh Papiermaschine
ES2875920T3 (es) * 2018-10-05 2021-11-11 Billerudkorsnaes Ab Método de producción de papel kraft o papel de bolsa

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US3327952A (en) * 1964-08-01 1967-06-27 West Virginia Pulp & Paper Co Method for the preparation of fibrous materials for the production of paper and cardboard
CA2325914A1 (fr) * 1997-05-28 1998-12-03 David V. Lange Appareil a presse a pince allongee
DE19926805A1 (de) * 1999-06-12 2000-12-14 Voith Sulzer Papiertech Patent Stoffauflauf mit Fluidzudosierung
DE29924920U1 (de) * 1999-11-16 2006-08-31 Voith Paper Patent Gmbh Pressenanordnung
DE10106684A1 (de) 2001-02-14 2002-08-29 Voith Paper Patent Gmbh Lamelle eines Stoffauflaufs einer Papier-, Karton- oder Tissuemaschine
AT500751B8 (de) * 2003-02-20 2007-02-15 Bartelmuss Klaus Ing Vorrichtung zur behandlung, insbesondere zur unterdruck-beaufschlagung, des in einer anlage zur papiererzeugung vorgesehenen, im umlauf bewegten mindestens einen siebbandes bzw. filzbandes
DE102004036276A1 (de) * 2004-07-27 2006-02-16 Voith Paper Patent Gmbh Verfahren und Vorrichtung zum Aufbringen eines Auftragmediums in einer Maschine zur Herstellung einer Faserstoffbahn
DE102008043727A1 (de) 2008-11-13 2010-05-20 Voith Patent Gmbh Verfahren zur Herstellung von Sackpapier, Sackpapier und Papiersack

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2752200C1 (ru) * 2019-12-12 2021-07-23 Фойт Патент Гмбх Машина и способ для изготовления полотна волокнистого материала
EP4400647A1 (fr) * 2023-01-16 2024-07-17 Billerud Aktiebolag (publ) Papier extensible
WO2024153360A1 (fr) 2023-01-16 2024-07-25 Billerud Aktiebolag (Publ) Papier étirable

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Publication number Publication date
WO2011151239A2 (fr) 2011-12-08
CN103097608A (zh) 2013-05-08
EP2576895A2 (fr) 2013-04-10
DE102010029580A1 (de) 2011-12-01
WO2011151239A3 (fr) 2012-01-26
CN103097608B (zh) 2016-05-11

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