EP1382742B1 - Dispositif et Procédé pour l' imprégnation d' une bande de papier ou carton - Google Patents

Dispositif et Procédé pour l' imprégnation d' une bande de papier ou carton Download PDF

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Publication number
EP1382742B1
EP1382742B1 EP03015423A EP03015423A EP1382742B1 EP 1382742 B1 EP1382742 B1 EP 1382742B1 EP 03015423 A EP03015423 A EP 03015423A EP 03015423 A EP03015423 A EP 03015423A EP 1382742 B1 EP1382742 B1 EP 1382742B1
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EP
European Patent Office
Prior art keywords
web
nip
broad
paper
application
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.)
Revoked
Application number
EP03015423A
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German (de)
English (en)
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EP1382742A2 (fr
EP1382742A3 (fr
Inventor
Rüdiger Dr. Kurtz
Alfred Dr. Bubik
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
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Publication date
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Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1382742A2 publication Critical patent/EP1382742A2/fr
Publication of EP1382742A3 publication Critical patent/EP1382742A3/fr
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/006—Calenders; Smoothing apparatus with extended nips
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/009—Apparatus for glaze-coating paper webs
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/30—Pretreatment of the 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls

Definitions

  • the invention relates to a device for impregnating a paper or board web having a basis weight over 40 g / m 2 , with a web running path, in which a device for applying an impregnating agent, such as a starch solution, so-called starch glue, or other commonly used in paper finishing order means arranged is, wherein in the web running path in front of the applicator a Breitnipkalander is arranged, which has a formed by a circumferential jacket and a cooperating counter-pressure element wide nip through which the web running path is guided.
  • an impregnating agent such as a starch solution, so-called starch glue, or other commonly used in paper finishing order means arranged
  • the invention relates to a method for impregnating a paper or board web with an impregnating agent, such as a starch solution, so-called starch glue, or other customary in the paper finishing applicator, wherein the impregnating agent is completely or partially pressed into the web.
  • an impregnating agent such as a starch solution, so-called starch glue, or other customary in the paper finishing applicator
  • Paper or board webs are predominantly made of cellulose fiber. They therefore have a polar, strong hydrophilic character, so are easily wetted and swellable by water.
  • some paper or board grades are "glued", ie by adding a liquid impregnating agent, such as starch glue, also called “glue” for short, or others the paper finishing customary application agent, at least partially hydrophobic.
  • a liquid impregnating agent such as starch glue, also called “glue” for short, or others the paper finishing customary application agent, at least partially hydrophobic.
  • the impregnation also has the advantage that the strength of the web is increased.
  • WO-A-02/29159 discloses a method and apparatus for treating a web of material with a nip calender.
  • the Breitnipkalander is formed by a circumferential jacket and a cooperating counter-pressure element.
  • the counter-pressure element is designed as a heatable counter roll, the surface temperature should be between 120 and 350 ° C.
  • the extended nip calender can be used for drying the material web, as a precalender before a coating device or as a final calender behind a coating device.
  • WO-A-03/050352 A1 describes a method for treating a material web, wherein the material web is first passed through a machine calender and from there into a precoating device. Thereafter, the web is passed through a Breitnipkalander, in order subsequently to obtain at least one further coating in a coating installation. Finally, the web is again passed through a calender.
  • the invention has for its object to improve the impregnation of the paper or board web without having to accept a larger volume loss in purchasing.
  • the Breitnipkalander has the advantage that an elastic compression can be achieved, ie it comes with relatively small compressive stresses. The registered in the broad nip forces are distributed over a relatively large area, so that there is a volume-saving effect.
  • the shell of the Breitnipkalanders should have a certain flexibility, so that it can adapt to the shape of the counter-pressure element, such as a counter-roller.
  • This compliance has another advantage. It leads to the fact that the web is not squeezed in the nip. Even locally, no structures are destroyed. In broad nip the web is compressed evenly, ie also flake areas are not overpressed, but similarly compressed with adjacent areas where no such fiber collections have formed. Since the web is uniformly compacted everywhere, the same capillary action results everywhere, ie the impregnating agent is uniformly absorbed over the entire surface of the web.
  • the web comes out of the wide nip and runs directly into the application facility. In between, it can indeed be redirected and possibly also spread out. However, a processing in the sense of an impact on the web or its structure does not take place.
  • This approach has the advantage that the compaction, even if it is temporary, is still present when the web enters the applicator. There, the web can then be soaked with impregnating agent, whereby the job can of course still be supported by a certain pressure from the outside.
  • the broad nip has a heating device.
  • the heater has two advantages. On the one hand, the surface properties of the web are improved. On the other hand, the penetration of the liquid impregnating agent into the web is promoted by an elevated temperature of the web. The capillary action is improved.
  • the heating device is formed by the counter-pressure element. This is a relatively easy way to enter the required heat energy in the broad nip, more precisely, to transfer to the web.
  • the heating device has a surface which delimits the web running path in the nip, whose temperature can be set to 200 ° C. or more. If the web is heated in the nip with such a high temperature, then it has in the following Application device still a temperature which is high enough to support the penetration of the impregnating agent in the web. The temperature of the web in the applicator will usually be below 100 ° C, so that there is no risk that the impregnating liquid begins to boil.
  • the applicator is formed as a film press.
  • the use of a film press over a size press has the advantage that you can drive at higher speeds.
  • the film press also referred to as "Speed Sizer”
  • the film press is provided with a film of liquid impregnant and transfers this film in a nip on the paper or board web.
  • the film press thus causes a contour application of the liquid impregnating agent on the surface of the paper or board web. This results in a particularly advantageous interaction with the broad nip, where a contour smoothing, so a similar processing takes place. In the broad nip a uniform density of the web is produced, whereas the generation of a uniform thickness is of minor importance.
  • the application device is followed by a drying area, wherein the temperature in the nip is higher than the temperature in the drying area.
  • the temperature in the drying zone should be lower than the plasticizing temperature of the fibers of the web. The surface of the web is thus no longer significantly changed in the drying area.
  • the temperature in the nip is adjustable at least to the plasticizing temperature of the fibers of the paper or board web.
  • the surface of the web can be closed in the nip. The closing creates a smooth surface of the web without preventing penetration of the saturant liquid.
  • the impregnating agent can still penetrate into the interior of the web due to the capillary action. This is especially true if the impregnating agent is supported by a printing effect from the outside, for example by the film press or a size press.
  • no smoothing device is preferably arranged between the application device and a downstream take-up device.
  • Smoothing means here are to be understood as meaning both a smoothing work with two hard rolls and another two-roll or multi-roll machine in which at least one roll has an elastic or flexible surface.
  • the object is achieved in a method of the type mentioned above in that the web is applied before the order of the impregnating agent in a nip with pressure, which is formed by a circumferential jacket and a cooperating counter-pressure element and an elastic compression of the paper or board web causes.
  • the web is slightly compressed, compressed so that it shows an excellent capillary action when applying the impregnating agent.
  • the web then sucks fully with the saturant, whereby the application and penetration of impregnant can of course be enhanced by external pressures such as may be applied by cooperating rollers.
  • external pressures such as may be applied by cooperating rollers.
  • such pressures can be kept much lower, so that the volume loss of the web during application of the impregnating agent can be kept smaller.
  • This volume loss can be kept extremely small. Due to the large loading surface of the web in the nip, it is possible to adjust the compression of the web very accurately. The Compressive stresses that act on the web in the nip can be kept relatively small.
  • the web is heated in the nip.
  • the heating has, as stated above, two advantages.
  • a warmer web has improved capillary action, i. the liquid impregnating agent can be absorbed more easily and thus penetrate into the interior of the web.
  • the web in the nip is smoothed to some extent, so that the impregnating agent can be applied to a smoother surface, which in turn improves the uniformity of the job.
  • the impregnating agent is applied in the contour application.
  • a film press can be used. Since a contour smoothing takes place in the nip, the contour application of the impregnating agent of the preceding treatment of the web adapts in a favorable manner.
  • Fig. 1 shows schematically a paper machine 100 with a wire section 1, a press section 2, a drying section 3, which is divided into two parts 3a, 3b and between the two parts 3a, 3b of the dryer section an applicator 4 for an impregnating agent, such as a starch solution , a so-called starch glue, or other customary in the paper finishing order means, eg an aqueous pigment dispersion, with an upstream Breitnipkalander 5.
  • a winding device 6 is arranged, in which a paper or board web 7 is wound into a winding roll 8. It should be noted that between the applicator 4 and the winding device 6 no more smoothing device is arranged, i. the web 7 is already provided in the Breitnipkalander 5 and the subsequent applicator with such a surface smoothness that further smoothing is not required.
  • the web 7 is passed through the nip calender 5 and then through the applicator 4. Thereafter, it is dried in the second section 3b of the dryer section, where further drying cylinders 13 are provided, which are also heated in order to evaporate liquid from the web 7.
  • FIG. 2 now shows an enlarged section of the paper machine with the applicator 4 and the broad nip calender 5.
  • the broad nip calender 5 is formed by a heated mating roll 14 provided with heating channels 15 through which a hot liquid or other heating medium can be passed to heat the mating roll 14.
  • the counter-roller 14 is heated so that its surface 16 assumes a temperature of at least 200 ° C.
  • the temperature of the surface 16 should be so high that the web fibers are plasticized at least in the region of their surface.
  • the counter-roller 14 forms a broad nip 17 together with a peripheral jacket 18 which rests under the action of a pressure shoe 19 on the surface 16 of the counter-roller 14 and the counter-roller 14 wraps over part of its circumference.
  • the jacket 18 is not directly on the surface 16 of the backing roll 14, but with the interposition of the web 7.
  • the pressure shoe 19 has a pressure surface 20, the curvature of the curvature of the surface 16 of the backing roll 14 is adjusted.
  • the pressure surface 20 is lubricated, for example, hydrostatic or hydrodynamic.
  • the pressure shoe 19 can be acted upon by a piston-cylinder device 21 with a force, so that in the broad nip 17, a certain compressive stress can be generated.
  • the compressive stress in the extended nip 17 is relatively small compared to a compressive stress that would prevail under otherwise unchanged force conditions in a nip between two rollers.
  • the jacket 18 may, as shown, be relatively stiff and rotate in the manner of a roll shell. Here he is supported by rollers 22. But the jacket 18 may also be made relatively thin, so that it rotates in the manner of a band. In both cases, he should still be somewhat forgiving.
  • the broad nip 17 has a relatively large length in the running direction of the web 7. This is preferably between 50 and 700 mm. It is therefore possible to adjust the compressive stresses in the extended nip 17 relatively sensitively.
  • the web 7 is fed via guide rollers 23, 24 of the applicator 4, which is formed in the present case as a film press or "Speed Sizer".
  • the application device 4 has two rollers 25, 26 which rotate in the direction of the arrows 27, 28 and are pressed against one another in the direction of the arrows 29, 30 and form a nip 31. Through the nip the web 7 is guided. It is subjected to a certain pressure there.
  • Each roller 25, 26 is provided with an impregnating agent dispenser 32, 33 which applies an impregnating agent film 34, 35 on the surface of the rollers 25, 26.
  • the impregnating agent film 34, 35 is adjusted so that the impregnating agent can be almost completely absorbed by the web 7.
  • the web 7 is slightly compressed. However, this compaction does not take place with the aim of producing a uniform thickness over the width of the web 7. Rather, the pressurization of the web 7 in the nip 17 is such that one generates a uniform density. The pressurization is limited so far that flake areas are not crushed. Local thickening of the web 7 thus remain. This is apparent from Fig. 3, where the web 7 is partially shown in cross section. There are elevations 36 recognizable, which alternate with valleys 37. The smoothing in the broad nip 17 is thus a contour smoothing.
  • the compaction in the extended nip 17 is adjusted so that the web 7 unfolds in the nip 31 of the applicator 4 an increased capillary action.
  • the impregnating agent from the impregnating agent films 34, 35 is therefore not only introduced into the web 7 by the pressure 29, 30. Rather, the impregnating agent is supported by the fact that the impregnating agent is absorbed by the capillary action of the web 7. This makes it much faster and deeper into the web 7 penetrate or penetrate, as it would be possible only with the help of pressurization.
  • thicker webs 7, ie webs with larger basis weights, of for example 90 g / m 2 or more, can be impregnated completely with impregnating agent, without having to accept a greater volume loss.
  • a certain volume loss in the nip 17 is unavoidable. However, this volume loss is relatively low due to the relatively low compressive stresses in the extended nip 17.
  • the capillary effect can still be supported by the heating of the web 7 by means of the counter-roller 14.
  • the capillary action improves with the increase in temperature.
  • the temperature of the web 7 in the nip 31 of the applicator 4 remains below 100 ° C in order to prevent boiling of the liquid impregnating agent.
  • the temperature of the backing roll 14 is preferably adjusted so that the fibers of the web 7 are plasticized in the extended nip 17.
  • the fibers are so reshaped that they can no longer stand up. This improves the ability of the web 7 to receive impregnant in the nip 31 because the web can then abut the rolls 25, 26 "more fully".
  • Trained as a film press applicator 4 causes a contour application of the impregnating agent on the surface of the web 7, which can also be seen from Fig. 3.
  • a layer 38 which should symbolize the applied impregnating agent. It can be seen that this layer 38 has substantially the same thickness throughout.

Landscapes

  • Paper (AREA)
  • Coating Apparatus (AREA)

Claims (12)

  1. Dispositif pour l'imprégnation d'une bande de papier ou de carton ayant un grammage supérieur à 40 g/m2, avec une voie d'avance de la bande dans laquelle est disposé un dispositif pour appliquer un agent d'imprégnation, comme une solution amidonnée, qu'on appelle une pâte d'amidon, ou un autre agent d'enduction usuel pour le finissage du papier, une calandre à pince allongée (5) étant disposée dans la voie d'avance de la bande avant le dispositif d'enduction (4) et présentant une pince allongée (17) formée par une enveloppe périphérique (18) et un élément de contre-pression (14) coopérant avec elle et à travers laquelle est guidée la voie d'avance de la bande, caractérisé en ce que la calandre à pince allongée (5) provoque une compression élastique de la bande de papier ou de carton, la calandre à pince allongée et le dispositif d'enduction étant disposés de telle sorte que la bande de papier ou de carton présente encore une compression élastique à l'entrée dans le dispositif d'enduction (4).
  2. Dispositif selon la revendication 1, caractérisé en ce qu'aucun dispositif de traitement supplémentaire n'est disposé entre la pince allongée (17) et le dispositif d'enduction (4), à l'exception de dispositifs de guidage (23, 24) éventuellement présents.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la pince allongée (17) présente un dispositif de chauffage (14).
  4. Dispositif selon la revendication 3, caractérisé en ce que le dispositif de chauffage est formé par l'élément de contre-pression (14).
  5. Dispositif selon la revendication 3 ou 4, caractérisé en ce que le dispositif de chauffage (14) présente une surface limitant la voie d'avance de la bande dans la pince allongée (17), dont la température peut être ajustée à 200°C ou plus.
  6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le dispositif d'enduction (4) est réalisé sous la forme d'une presse à film.
  7. Dispositif selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le dispositif d'enduction (4) est suivi d'une zone de séchage (36), la température dans la pince allongée (17) étant plus élevée que dans la zone de séchage.
  8. Dispositif selon l'une quelconque des revendications 1 à 7, caractérisé en ce que la température dans la pince allongée (17) peut au moins être ajustée à la température de plastification des fibres de la bande de papier ou de carton (7).
  9. Dispositif selon l'une quelconque des revendications 1 à 8, caractérisé en ce que l'on ne dispose aucun dispositif de lissage entre le dispositif d'enduction (4) et un dispositif d'enroulement suivant (6).
  10. Procédé d'imprégnation d'une bande de papier ou de carton avec un agent d'imprégnation comme une solution amidonnée, qu'on appelle une pâte d'amidon, ou un autre agent d'enduction usuel pour le finissage du papier, l'agent d'imprégnation étant complètement ou partiellement pressé dans la bande, caractérisé en ce que la bande est sollicitée en pression avant l'application de l'agent d'imprégnation dans une pince allongée qui est formée par une enveloppe périphérique et un élément de contre-pression coopérant avec elle et qui provoque une compression élastique de la bande de papier ou de carton.
  11. Procédé selon la revendication 10, caractérisé en ce que la bande est chauffée dans la pince allongée.
  12. Procédé selon la revendication 10 ou 11, caractérisé en ce que l'agent d'imprégnation est appliqué dans une application périphérique.
EP03015423A 2002-07-18 2003-07-09 Dispositif et Procédé pour l' imprégnation d' une bande de papier ou carton Revoked EP1382742B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10232550 2002-07-18
DE10232550A DE10232550C5 (de) 2002-07-18 2002-07-18 Vorrichtung und Verfahren zum Imprägnieren einer Papier- oder Kartonbahn

Publications (3)

Publication Number Publication Date
EP1382742A2 EP1382742A2 (fr) 2004-01-21
EP1382742A3 EP1382742A3 (fr) 2005-02-09
EP1382742B1 true EP1382742B1 (fr) 2007-02-21

Family

ID=29762029

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03015423A Revoked EP1382742B1 (fr) 2002-07-18 2003-07-09 Dispositif et Procédé pour l' imprégnation d' une bande de papier ou carton

Country Status (3)

Country Link
US (1) US20040062868A1 (fr)
EP (1) EP1382742B1 (fr)
DE (2) DE10232550C5 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10255422B4 (de) * 2002-11-28 2004-10-28 Voith Paper Patent Gmbh Verfahren und Vorrichtung zum Behandeln einer Papier- oder Kartonbahn
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
DE102006016869A1 (de) * 2006-04-07 2007-10-18 Voith Patent Gmbh Verfahren und Vorrichtung zum Behandeln einer Bahn aus Faserstoff
CN115467188B (zh) * 2022-09-16 2023-08-22 江苏瀚凯工业自动化科技有限公司 一种浸渍干燥生产线的胶液防凝固装置及其方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE68907058T2 (de) * 1989-11-16 1993-09-16 Beloit Corp Vorrichtung zur beschichtung.
ATE216742T1 (de) * 1995-01-06 2002-05-15 Skc Acquisition Corp Verbessertes verfahren zur herstellung von papier
FI2664U1 (fi) * 1996-07-16 1996-11-29 Valmet Corp Laitteisto kartonkirainan kalanteroimiseksi
DE19704858B4 (de) * 1997-02-10 2005-07-21 Voith Paper Gmbh & Co. Kg Verfahren und Vorrichtung zum Herstellen beidseitig gestrichener Papierbahnen
SE9804346D0 (sv) * 1998-12-16 1998-12-16 Valmet Corp Method and apparatus for calendering paper
FI115405B (fi) * 2000-06-20 2005-04-29 Metso Paper Inc Kalanterointimenetelmä erityisesti esikalanterointia varten ja paperin käsittelylinja
AU2001289975A1 (en) * 2000-10-02 2002-04-15 Metso Paper Inc. Method and arrangement for calendering a web comprising a long-nip calender
FI111281B (fi) * 2001-12-12 2003-06-30 Metso Paper Inc Menetelmä kartongin jälkikäsittelemiseksi
DE10255422B4 (de) * 2002-11-28 2004-10-28 Voith Paper Patent Gmbh Verfahren und Vorrichtung zum Behandeln einer Papier- oder Kartonbahn
DE10316850B8 (de) * 2003-04-11 2005-06-30 Voith Paper Patent Gmbh Verfahren zum Behandeln einer Kartonbahn

Also Published As

Publication number Publication date
EP1382742A2 (fr) 2004-01-21
DE10232550C5 (de) 2013-02-07
DE50306562D1 (de) 2007-04-05
DE10232550B4 (de) 2006-04-06
DE10232550A1 (de) 2004-01-29
EP1382742A3 (fr) 2005-02-09
US20040062868A1 (en) 2004-04-01

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