EP2598694B1 - Process for producing a fibrous web, in particular a paper or board web - Google Patents
Process for producing a fibrous web, in particular a paper or board web Download PDFInfo
- Publication number
- EP2598694B1 EP2598694B1 EP11720775.3A EP11720775A EP2598694B1 EP 2598694 B1 EP2598694 B1 EP 2598694B1 EP 11720775 A EP11720775 A EP 11720775A EP 2598694 B1 EP2598694 B1 EP 2598694B1
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- EP
- European Patent Office
- Prior art keywords
- fibrous web
- coating
- machine
- curtain
- starch
- 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
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Classifications
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- 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
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- 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
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- 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
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/54—Starch
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- 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
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/82—Paper comprising more than one coating superposed
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- 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
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/84—Paper comprising more than one coating on both sides of the substrate
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- 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
- D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
- D21H23/34—Knife or blade type coaters
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- 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
- D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
- D21H23/48—Curtain coaters
Definitions
- the invention relates to a method for producing a multilayer and coated fibrous web, in particular a paper or board web, wherein the fibrous web is produced in multiple layers in a former section, dewatered in a press section and dried in a pre-dryer section.
- the document DE10 2008 054 908 A1 discloses a method for multiple coating of a fibrous web, in particular a movable board web with liquid or pastoese application media.
- a first application medium for producing a first layer and in a subsequent process step at least one further application medium for generating at least one further layer with at least one postdosing applicator applied and in one of the further process steps, at least one further third application medium for generating at least one further applied third layer with a curtain applicator, wherein after each job, the fibrous web is dried. Thickness is applied as the first application medium.
- the document EP1964971 A2 also discloses a process for the production of coated paper, wherein the fibrous web formed with a headbox and a wire section of a pulp suspension, dewatered in a press section and then dried in a predrying to a residual moisture content. Subsequently, at least one side of the fibrous web is coated with at least three application layers, with the last two application layers being applied with a 1: 1 applicator.
- White top liners and white top test liners are cardboard sheets, which are usually made up of three layers: top layer, protective layer and supine.
- the cover layer is the side that will be printed later, it consists of white fresh fiber and is additionally painted. It is important that the page to be printed is as white as possible and as smooth and shiny as possible, and has a good printability.
- the fibrous web should have good strength properties for further use. This is achieved primarily by the weight per unit area, the choice of pulp and the addition of starch to the pulp suspension.
- the three layers in the forming section are produced individually and then combined to form a fibrous web.
- the press section it is then mechanically dewatered under pressure in several press nipples and dried in the subsequent pre-drying section by means of heated drying cylinders.
- the fibrous web is smoothed in a pre-calender and calibrated to uniform thickness, so that the applied in a subsequent film coater pigment-containing primer a Fibrous web is achieved at a lower basis weight or with lower pulp or more filler, without adverse effects on the other important properties arise.
- a low frequency of demolition and high runnability, and a lower energy requirement for drying in the machine should result.
- the object is achieved for the aforementioned method according to the invention that after the pre-dryer section in a subsequent film applicator on the fibrous web is simultaneously applied starch on both sides and that the fibrous web is then painted in the direction of passage only on one side in a curtain coater with pigment-containing paint and the fibrous web after painting in the curtain coater in a blade coater once again coated with pigment-containing paint.
- a curtain coater much more coating can be applied in one operation than with a film applicator or a blade coater.
- starch can be applied from both sides to increase the strength, which allows a higher amount of starch application and leads to a higher penetration into the fibrous web, whereby the strength is increased more. That is, the basis weight can be reduced or it can be used in one or more layers of lower quality pulp, such as a poorer waste paper quality, or more filler.
- the lower tear frequency results in the film applicator in that less viscous starch liquor is applied instead of a higher viscous coating color, and in the curtain coater by the contactless application.
- An additional benefit is that, after starch has been applied, drying can be done more efficiently in a more efficient manner in contact with heated cylinders than in previous methods with more energy-intensive IR or air dryers.
- the object is achieved for the aforementioned method according to the invention that after the pre-dryer section in a subsequent film applicator on the fibrous web is simultaneously applied starch on both sides and that the fibrous web is then painted in the direction of passage only on one side in a curtain coater with pigment-containing paint , With a curtain coater much more coating can be applied in one operation than with a film applicator or a blade coater.
- starch can be applied from both sides to increase the strength, which allows a higher amount of starch application and leads to a higher penetration into the fibrous web, whereby the strength is increased more. That is, the basis weight can be reduced or it can be used in one or more layers of lower quality pulp, such as a poorer waste paper quality, or more filler.
- the lower tear frequency results in the film applicator in that less viscous starch liquor is applied instead of a higher viscous coating color, and in the curtain coater by the contactless application.
- An added benefit is that after starch has been applied, drying can be done more efficiently in a more efficient manner in contact with heated cylinders than in previous methods with more energy-intensive IR or air dryers.
- the starch application in the film applicator can take place and then, however, before the curtain coating, the smoothing in a pre-calender.
- the surface becomes sufficiently smooth for a good curtain coat, but the consequent compaction and reduction of the water absorbency of the fibrous web takes place only after the starch application.
- the curtain coating is two-ply or multi-ply, wherein a differently composed coating color is used for at least two of the layers of the curtain coating.
- a differently composed coating color is used for at least two of the layers of the curtain coating.
- a quantity of starch based on the dry weight of the starch of 1 to 4 g / m 2 per side, in particular at least 2 g / m 2 per side on the fibrous web.
- the usual application amount for a pigment-containing precoat by means of a film applicator is approximately 8 g / m 2 .
- the object is achieved according to the invention for the machine described in the introduction in that after the pre-drying section in the direction of the fibrous web successively has a film applying device applying starch on both sides, then a curtain coater and then a blade coater.
- the object is also achieved according to the invention, by a machine which after the pre-drying in the direction of the fibrous web successively applying a double-sided thickness applying film applicator, then a pre-calender and then a curtain coater.
- Both machines are capable of achieving the advantages previously described and of avoiding adverse effects on the quality of the painted surface.
- the surface before the curtain coat can be prepared so that a good quality can be created by the stroke.
- a final topcoat may be applied resulting in a smoother surface.
- the two variants of the machine can be combined with advantage.
- the machine Due to the lower tendency to tear and the good runnability of the machine according to the invention, it is additionally possible to carry out the machine as an on-line machine, the fibrous web of The former until the roll of finished paper by all the application and coating equipment, drying sections and calenders or smoothing devices can be performed online one after the other without the machine has a Swissrollung therebetween.
- the drawing shows in Fig.1 a part of a machine according to the invention for carrying out an embodiment of the method according to the invention.
- Fig.1 shows a preferred embodiment of the machine according to the invention from the pre-dryer section 10 or a machine, as can be used for example for producing a white-top liner or white-top test liner paperboard web according to a preferred embodiment of the method according to the invention.
- the production of the multilayer board web in a former section and the dewatering thereof in a press section are not shown.
- the fibrous web 9 is after drying in the pre-dryer section 10 without passing through a smoothing device, fed directly into the film applicator 1 and there applied from both sides with starch, which is applied in the form of an aqueous starch solution or starch suspension over rollers. Thereafter, the fibrous web is deflected around a so-called Airturn around contactless and led to the first after-dryer section (20), in which it is dried by contact with heated drying cylinders to the desired moisture content. Due to the double-sided application of starch to the not yet smoothed fibrous web much starch can be applied and the starch can penetrate far into the interior and so particularly good increase the strength of the fibrous web.
- the fibrous web is smoothed so that its surface has good properties for subsequent non-contact coating.
- a curtain coater (3) which in the illustrated embodiment sweeps the top of the fibrous web with a two-ply curtain coat with pigment-containing paint.
- the two-layer curtain coating is produced by the interaction of a first metering device (3a) for the first curtain layer and a further metering device (3b) for the further curtain layer.
- a first metering device for the first curtain layer
- a further metering device 3b
- different coating colors can be used in the two layers, which allows precise matching to the necessary properties of the different layers.
- the two-ply curtain coating ensures good and even coverage of the fibrous web.
- a coating color with less high quality pigment can be used for the base coverage, while in the second curtain layer for fine coverage, medium to higher quality pigment can be used.
- the coating layer and the fibrous web are first dried without contact, for example with IR driers (4a), which may be provided on one or both sides of the web.
- IR driers (4a) which may be provided on one or both sides of the web.
- air dryers can also be used, depending on the amount of coating applied and the coating color.
- the upper side of the fibrous web with pigment-containing coating color is once more painted to form a cover layer.
- a coating color is used with high-quality pigment, since the top layer is the later to be printed layer.
- the Blade coater 6 is shown with a doctor bar, which strips off the excess coating color.
- flexible or rigid blades may be used.
- Advantageous for smoothness, gloss and printability of the cover layer is that the blade coater does not work without contact, but that the cover layer is leveled by the doctor blade or the blade and provided with a very smooth surface.
- the coating layer and the fibrous web are in turn dried without contact. Shown are IR dryer 4b and air dryer 5, with only IR or only air dryer would be conceivable. As soon as the surface is sufficiently dry again, a third after-dryer section 40 follows, where drying is completed with the help of drying cylinders.
- Both before Vorkalander 2 and before the Fertigkalander 7 moistening facilities may be provided which apply steam and / or water, so that smoothness and gloss further improved and any curl can be further reduced.
- an online machine and an online process is shown, ie all process steps for producing and refining the fibrous web, in particular starch application, brushing, smoothing done in a machine successively without embaufrollung. Not shown are the rewinding and slitting, which always takes place in a separate machine. However, according to the invention, this also no longer belongs to the manufacture and finishing, since in this case the properties of the fibrous web are no longer changed.
Description
Die Erfindung betrifft ein Verfahren zur Herstellung einer mehrlagigen und gestrichenen Faserstoffbahn, insbesondere einer Papier- oder Kartonbahn, wobei die Faserstoffbahn in einer Formerpartie mehrlagig hergestellt, in einer Pressenpartie entwässert und in einer Vortrockenpartie getrocknet wird.The invention relates to a method for producing a multilayer and coated fibrous web, in particular a paper or board web, wherein the fibrous web is produced in multiple layers in a former section, dewatered in a press section and dried in a pre-dryer section.
Weiterhin betrifft es eine Maschine zur Durchführung dieses Verfahrens.Furthermore, it relates to a machine for carrying out this method.
Das Dokument
Im Dokument
Das Dokument
Zur Herstellung einer mehrlagigen und gestrichenen Faserstoffbahn, zum Beispiel eines sogenannten White-Top-Liners oder White-Top-Test-Liners ist das nachfolgend beschriebene Verfahren bekannt.To produce a multilayer and coated fibrous web, for example a so-called white top liner or white top test liner, the method described below is known.
White-Top-Liner und White-Top-Test-Liner sind Kartonbahnen, die üblicherweise aus drei Lagen aufgebaut sind: Decklage, Schonschicht und Rückenlage. Die Decklage ist die Seite, die später bedruckt wird, sie besteht aus weißer Frischfaser und wird zusätzlich noch gestrichen. Wichtig ist es, dass die zu bedruckende Seite möglichst weiß und möglichst glatt und glänzend wird, sowie eine gute Bedruckbarkeit aufweist. Außerdem soll die Faserstoffbahn für die weitere Verwendung gute Festigkeitseigenschaften besitzen. Das wird vor allem durch das Flächengewicht, die Faserstoffauswahl und die Zugabe von Stärke in die Faserstoffsuspension erreicht.White top liners and white top test liners are cardboard sheets, which are usually made up of three layers: top layer, protective layer and supine. The cover layer is the side that will be printed later, it consists of white fresh fiber and is additionally painted. It is important that the page to be printed is as white as possible and as smooth and shiny as possible, and has a good printability. In addition, the fibrous web should have good strength properties for further use. This is achieved primarily by the weight per unit area, the choice of pulp and the addition of starch to the pulp suspension.
Bei dem bekannten Verfahren werden die drei Lagen in der Formerpartie einzeln hergestellt und anschließend zu einer Faserstoffbahn zusammengeführt. In der Pressenpartie wird sie dann in mehreren Pressnips mechanisch unter Druck entwässert und in der sich anschließenden Vortrockenpartie mithilfe von beheizten Trockenzylindern getrocknet. Anschließend wird die Faserstoffbahn in einem Vorkalander geglättet und auf gleichmäßige Dicke kalibriert, damit der in einer nachfolgenden Filmstreicheinrichtung aufgebrachte pigment-haltige Vorstrich eine Faserstoffbahn bei geringerem Flächengewicht oder mit geringwertigerem Faserstoff oder mit mehr Füllstoff erreicht wird, ohne dass nachteilige Auswirkungen auf die anderen wichtigen Eigenschaften entstehen. Weiterhin soll sich eine geringe Abrisshäufigkeit und hohe Runnability, sowie ein geringerer Energiebedarf für die Trocknung in der Maschine ergeben.In the known method, the three layers in the forming section are produced individually and then combined to form a fibrous web. In the press section, it is then mechanically dewatered under pressure in several press nipples and dried in the subsequent pre-drying section by means of heated drying cylinders. Subsequently, the fibrous web is smoothed in a pre-calender and calibrated to uniform thickness, so that the applied in a subsequent film coater pigment-containing primer a Fibrous web is achieved at a lower basis weight or with lower pulp or more filler, without adverse effects on the other important properties arise. Furthermore, a low frequency of demolition and high runnability, and a lower energy requirement for drying in the machine should result.
Die Aufgabe wird für das eingangs genannte Verfahren erfindungsgemäß dadurch gelöst, dass nach der Vortrockenpartie in einer sich anschließenden Filmauftragsvorrichtung auf die Faserstoffbahn beidseitig simultan Stärke aufgetragen wird und dass die Faserstoffbahn in Durchlaufrichtung danach nur auf einer Seite in einer Vorhangstreicheinrichtung mit pigment-haltiger Farbe gestrichen wird und die Faserstoffbahn nach dem Streichen in der Vorhangstreicheinrichtung in einer Klingenstreicheinrichtung noch mal einseitig mit pigment-haltiger Farbe gestrichen wird. Mit einer Vorhangstreicheinrichtung kann in einem Vorgang wesentlich mehr Strich aufgetragen werden als mit einer Filmauftragsvorrichtung oder einer Klingenstreicheinrichtung. Dadurch dass erfindungsgemäß darauf verzichtet wird, in der Filmauftragsvorrichtung einen pigment-haltigen Vorstrich aufzubringen, kann von beiden Seiten Stärke zur Festigkeitssteigerung appliziert werden, was eine höhere Stärkeauftragsmenge ermöglicht und zu einer höheren Eindringung in die Faserstoffbahn führt, wodurch die Festigkeit mehr gesteigert wird. D.h. es kann das Flächengewicht reduziert werden oder es kann in einer oder mehreren Lagen ein geringwertigerer Faserstoff, wie zum Beispiel eine schlechtere Altpapierqualität, oder mehr Füllstoff eingesetzt werden.The object is achieved for the aforementioned method according to the invention that after the pre-dryer section in a subsequent film applicator on the fibrous web is simultaneously applied starch on both sides and that the fibrous web is then painted in the direction of passage only on one side in a curtain coater with pigment-containing paint and the fibrous web after painting in the curtain coater in a blade coater once again coated with pigment-containing paint. With a curtain coater much more coating can be applied in one operation than with a film applicator or a blade coater. The fact that it is omitted according to the invention to apply a pigment-containing precoat in the film applicator, starch can be applied from both sides to increase the strength, which allows a higher amount of starch application and leads to a higher penetration into the fibrous web, whereby the strength is increased more. That is, the basis weight can be reduced or it can be used in one or more layers of lower quality pulp, such as a poorer waste paper quality, or more filler.
Die geringere Abrisshäufigkeit ergibt sich in der Filmauftragsvorrichtung dadurch, dass weniger viskose Stärkeflotte aufgetragen wird anstatt einer höher viskosen Streichfarbe, und in der Vorhangstreicheinrichtung durch den kontaktlosen Auftrag. Ein zusätzlicher Vorteil ist, dass nach dem Auftrag von Stärke die Trocknung ohne Probleme energieeffizienter im Kontakt mit beheizten Zylindern erfolgen kann statt wie in den bisherigen Verfahren mit energieintensiveren IR- oder Lufttrocknern.The lower tear frequency results in the film applicator in that less viscous starch liquor is applied instead of a higher viscous coating color, and in the curtain coater by the contactless application. An additional benefit is that, after starch has been applied, drying can be done more efficiently in a more efficient manner in contact with heated cylinders than in previous methods with more energy-intensive IR or air dryers.
Da in der Filmauftragsvorrichtung kein Pigmentstrich aufgebracht wird, ist es darüber hinaus vorteilhaft, insbesondere um nachteilige Auswirkungen bei der Oberflächenqualität zu vermeiden und eine gut zu bedruckende Oberfläche mit verbesserten Eigenschaften bezüglich Weiße, Glätte und Glanz zu erzielen, wenn Faserstoffbahn bei geringerem Flächengewicht oder mit geringwertigerem Faserstoff oder mit mehr Füllstoff erreicht wird, ohne dass nachteilige Auswirkungen auf die anderen wichtigen Eigenschaften entstehen. Weiterhin soll sich eine geringe Abrisshäufigkeit und hohe Runnability, sowie ein geringerer Energiebedarf für die Trocknung in der Maschine ergeben.In addition, since no pigment coating is applied in the film applicator, it is advantageous, in particular, to avoid adverse surface quality effects and to achieve a good print surface with improved whiteness, smoothness and gloss properties, when Fibrous web is achieved at a lower basis weight or with lower pulp or more filler, without adverse effects on the other important properties arise. Furthermore, a low frequency of demolition and high runnability, and a lower energy requirement for drying in the machine should result.
Die Aufgabe wird für das eingangs genannte Verfahren erfindungsgemäß dadurch gelöst, dass nach der Vortrockenpartie in einer sich anschließenden Filmauftragsvorrichtung auf die Faserstoffbahn beidseitig simultan Stärke aufgetragen wird und dass die Faserstoffbahn in Durchlaufrichtung danach nur auf einer Seite in einer Vorhangstreicheinrichtung mit pigment-haltiger Farbe gestrichen wird. Mit einer Vorhangstreicheinrichtung kann in einem Vorgang wesentlich mehr Strich aufgetragen werden als mit einer Filmauftragsvorrichtung oder einer Klingenstreicheinrichtung. Dadurch dass erfindungsgemäß darauf verzichtet wird, in der Filmauftragsvorrichtung einen pigment-haltigen Vorstrich aufzubringen, kann von beiden Seiten Stärke zur Festigkeitssteigerung appliziert werden, was eine höhere Stärkeauftragsmenge ermöglicht und zu einer höheren Eindringung in die Faserstoffbahn führt, wodurch die Festigkeit mehr gesteigert wird. D.h. es kann das Flächengewicht reduziert werden oder es kann in einer oder mehreren Lagen ein geringwertigerer Faserstoff, wie zum Beispiel eine schlechtere Altpapierqualität, oder mehr Füllstoff eingesetzt werden.The object is achieved for the aforementioned method according to the invention that after the pre-dryer section in a subsequent film applicator on the fibrous web is simultaneously applied starch on both sides and that the fibrous web is then painted in the direction of passage only on one side in a curtain coater with pigment-containing paint , With a curtain coater much more coating can be applied in one operation than with a film applicator or a blade coater. The fact that it is omitted according to the invention to apply a pigment-containing precoat in the film applicator, starch can be applied from both sides to increase the strength, which allows a higher amount of starch application and leads to a higher penetration into the fibrous web, whereby the strength is increased more. That is, the basis weight can be reduced or it can be used in one or more layers of lower quality pulp, such as a poorer waste paper quality, or more filler.
Die geringere Abrisshäufigkeit ergibt sich in der Filmauftragsvorrichtung dadurch, dass weniger viskose Stärkeflotte aufgetragen wird anstatt einer höher viskosen Streichfarbe, und in der Vorhangstreicheinrichtung durch den kontaktlosen Auftrag. Ein zusätzlicher Vorteil ist, dass nach dem Auftrag von Stärke die Trocknung ohne Probleme energieeffizienter im Kontakt mit beheizten Zylindern erfolgen kann statt wie in den bisherigen Verfahren mit energieintensiveren IR-oder Lufttrocknern.The lower tear frequency results in the film applicator in that less viscous starch liquor is applied instead of a higher viscous coating color, and in the curtain coater by the contactless application. An added benefit is that after starch has been applied, drying can be done more efficiently in a more efficient manner in contact with heated cylinders than in previous methods with more energy-intensive IR or air dryers.
Da in der Filmauftragsvorrichtung kein Pigmentstrich aufgebracht wird, ist es darüber hinaus vorteilhaft, insbesondere um nachteilige Auswirkungen bei der Oberflächenqualität zu vermeiden und eine gut zu bedruckende Oberfläche mit verbesserten Eigenschaften bezüglich Weiße, Glätte und Glanz zu erzielen, wenn die Faserstoffbahn nach dem Streichen in der Vorhangstreicheinrichtung in einer Klingenstreicheinrichtung noch mal einseitig mit pigment-haltiger Farbe gestrichen wird. Durch das Aufbringen der Streichfarbe auf die Faserstoffbahn mit einer flexiblen oder steifen Klinge oder mit einem Rakelstab wird die Strichoberfläche sehr glatt und gleichmäßig. Für den hier aufgebrachten Deckstrich, kann ein höherwertiges Pigment verwendet werden. Aufgrund der vorherigen guten Abdeckung durch den Vorhangstrich, wird nicht soviel Deckstrich benötigt und das Wasser der Streichfarbe dringt in der Klingenstreicheinrichtung nicht mehr so tief ein, dass dadurch eine Befeuchtung und Schwächung der Faserstoffbahn entsteht könnte, die zu vermehrten Abrissen führen würde.In addition, since no pigment coating is applied in the film applicator, it is advantageous, in particular, to avoid adverse surface quality effects and to achieve a good print surface with improved whiteness, smoothness and gloss properties, when the fibrous web after painting in the curtain coater in a blade coater is once again painted on one side with pigment-containing paint. By applying the coating color to the fibrous web with a flexible or rigid blade or a doctor bar, the coating surface becomes very smooth and uniform. For the topcoat applied here, a higher quality pigment can be used. Due to the previous good coverage by the curtain coat, not so much top coat is needed and the water of the coating color penetrates into the blade coater no longer so deep that this could cause moistening and weakening of the fibrous web, which would lead to increased demolition.
In vorteilhafter Weise kann direkt nach der Trocknung der Faserstoffbahn in der Vortrockenpartie der Stärkeauftrag in der Filmauftragsvorrichtung erfolgen und danach aber noch vor dem Vorhangstreichen die Glättung in einem Vorkalander. Somit wird die Oberfläche ausreichend glatt für einen guten Vorhangstrich, die damit verbundene Verdichtung und Verringerung der Wasseraufnahmefähigkeit der Faserstoffbahn findet aber erst nach dem Stärkeauftrag statt.Advantageously, immediately after the drying of the fibrous web in the pre-drying section, the starch application in the film applicator can take place and then, however, before the curtain coating, the smoothing in a pre-calender. Thus, the surface becomes sufficiently smooth for a good curtain coat, but the consequent compaction and reduction of the water absorbency of the fibrous web takes place only after the starch application.
Ebenso ist es vorteilhaft für das erfindungsgemäße Verfahren, wenn der Vorhangstrich zweilagig oder mehrlagig ist, wobei für mindestens zwei der Lagen des Vorhangsstrichs eine unterschiedlich zusammengesetzte Streichfarbe verwendet wird. Dadurch kann zum Beispiel für die erste Lage geringwertigeres und damit billigeres Pigment eingesetzt werden, und für die zweite Lage oder weitere Lagen höherwertiges und teureres.Likewise, it is advantageous for the method according to the invention if the curtain coating is two-ply or multi-ply, wherein a differently composed coating color is used for at least two of the layers of the curtain coating. As a result, it is possible, for example, to use less-valued and therefore cheaper pigment for the first layer, and higher-quality and more expensive for the second layer or further layers.
Um die festigkeitssteigernde Wirkung besonders gut zu nutzen, ist es vorteilhaft eine Stärkemenge bezogen auf das Trockengewicht der Stärke von 1 bis 4 g/m2 je Seite, insbesondere mindestens 2 g/m2 je Seite auf die Faserstoffbahn aufzutragen.To use the strength-increasing effect particularly well, it is advantageous to apply a quantity of starch based on the dry weight of the starch of 1 to 4 g / m 2 per side, in particular at least 2 g / m 2 per side on the fibrous web.
Um den Effekt des fehlenden Vorstrichs in der Filmauftragsvorrichtung zu kompensieren und eine gute Abdeckung durch den Strich zu bekommen ist es außerdem vorteilhaft, wenn in der Vorhangstreicheinrichtung eine hohe Strichmenge von 10 bis 30 g/m2 bezogen auf das Trockengewicht des Strichs, bevorzugt von 12 bis 25 g/m2 aufgetragen wird. Übliche Auftragsmenge bei einem pigment-haltigen Vorstrich mittels Filmauftragseinrichtung sind ca. 8 g/m2.In order to compensate for the effect of the missing precoating in the film applicator and to get a good coverage by the stroke, it is also advantageous if in the curtain coater a high Coating amount of 10 to 30 g / m 2 based on the dry weight of the bar, preferably from 12 to 25 g / m 2 is applied. The usual application amount for a pigment-containing precoat by means of a film applicator is approximately 8 g / m 2 .
Da die zu erwartende Abrisshäufigkeit in dem erfindungsgemäßen Verfahren gering ist, können besonders vorteilhaft alle Verfahrensschritte bis zum Fertigpapier, bei denen die Faserstoffbahn gestrichen oder getrocknet oder geglättet wird, nacheinander online ohne Zwischenaufrollung in einer Maschine erfolgen, wobei sich die eine Maschine von der Formerpartie bis zur Auftrollung des Fertigpapiers erstreckt.Since the expected tearing frequency in the process according to the invention is low, all process steps to finished paper in which the fibrous web is painted or dried or smoothed can be carried out one after the other online without intermediate reel-up in a machine, with one machine extending from the former to the end extends to Aufklung the finished paper.
Die Aufgabe wird für die eingangs beschriebene Maschine erfindungsgemäß dadurch gelöst, dass sie nach der Vortrockenpartie in Laufrichtung der Faserstoffbahn nacheinander eine beidseitig Stärke auftragende Filmauftragsvorrichtung, dann eine Vorhangstreicheinrichtung und dann eine Klingenstreicheinrichtung aufweist.The object is achieved according to the invention for the machine described in the introduction in that after the pre-drying section in the direction of the fibrous web successively has a film applying device applying starch on both sides, then a curtain coater and then a blade coater.
Die Aufgabe wird erfindungsgemäß ebenso gelöst, durch eine Maschine, die nach der Vortrockenpartie in Laufrichtung der Faserstoffbahn nacheinander eine beidseitig Stärke auftragende Filmauftragsvorrichtung, dann einen Vorkalander und dann eine Vorhangstreicheinrichtung aufweist.The object is also achieved according to the invention, by a machine which after the pre-drying in the direction of the fibrous web successively applying a double-sided thickness applying film applicator, then a pre-calender and then a curtain coater.
Beide Maschinen sind geeignet, die vorher beschriebenen Vorteile zu erzielen und nachteilige Auswirkungen auf die Qualität der gestrichenen Oberfläche zu vermeiden. Im Vorkalander kann die Oberfläche vor dem Vorhangstrich so vorbereitet werden, dass eine gute Qualität durch den Strich entstehen kann. Und in der Klingenstreichvorrichtung kann ein abschließender Deckstrich aufgebracht werden, der zu einer glätteren Oberfläche führt. Natürlich können die beiden Varianten der Maschine mit Vorteil auch kombiniert werden.Both machines are capable of achieving the advantages previously described and of avoiding adverse effects on the quality of the painted surface. In the pre-calender, the surface before the curtain coat can be prepared so that a good quality can be created by the stroke. And in the blade coater, a final topcoat may be applied resulting in a smoother surface. Of course, the two variants of the machine can be combined with advantage.
Durch die geringere Abrissneigung und die gute Runnability der erfindungsgemäßen Maschine ist es in zusätzlich vorteilhafter Weise möglich, die Maschine als eine online-Maschine auszuführen, wobei die Faserstoffbahn von der Formerpartie bis zur Aufrollung des Fertigpapiers durch alle Auftrags- und Streicheinrichtungen, Trockenpartien und Kalander oder Glätteinrichtungen nacheinander online geführt werden kann, ohne dass die Maschine dazwischen eine Zwischenaufrollung aufweist.Due to the lower tendency to tear and the good runnability of the machine according to the invention, it is additionally possible to carry out the machine as an on-line machine, the fibrous web of The former until the roll of finished paper by all the application and coating equipment, drying sections and calenders or smoothing devices can be performed online one after the other without the machine has a Zwischenaufrollung therebetween.
Anhand eines Ausführungsbeispiels werden weitere vorteilhafte Merkmale der Erfindung erläutert unter Bezugnahme auf die Zeichnung.Reference to an embodiment , further advantageous features of the invention will be explained with reference to the drawing.
Die Zeichnung zeigt
in
in
Nachfolgend wird die Figur detaillierter beschrieben.
Die Faserstoffbahn 9 wird nach der Trocknung in der Vortrockenpartie 10 ohne eine Glättvorrichtung zu durchlaufen, direkt in die Filmauftragsvorrichtung 1 geführt und dort von beiden Seiten mit Stärke beaufschlagt, welche in Form einer wässerigen Stärkelösung oder Stärkesuspension über Walzen aufgetragen wird. Danach wird die Faserstoffbahn um einen sogenannten Airturn herum kontaktlos umgelenkt und zur ersten Nachtrockenpartie (20) geführt, in der sie durch Kontakt mit beheizten Trockenzylindern auf die gewünschte Feuchte getrocknet wird. Durch den beidseitigen Stärkeauftrag auf die vorher noch nicht geglättete Faserstoffbahn kann viel Stärke aufgetragen werden und die Stärke kann weit ins Innere eindringen und so besonders gut die Festigkeit der Faserstoffbahn erhöhen.The fibrous web 9 is after drying in the
In dem sich anschließenden Vorkalander 2 wird die Faserstoffbahn geglättet, so dass ihre Oberfläche gute Eigenschaften für das nachfolgende berührungslose Streichen aufweist. Dies erfolgt in einer Vorhangstreicheinrichtung (3), welche in der dargestellten Ausführungsform die Oberseite der Faserstoffbahn mit einem zweilagigen Vorhangstrich mit pigment-haltiger Streichfarbe streicht. Der zweilagige Vorhangstrich entsteht durch das Zusammenwirken einer ersten Dosiereinrichtung (3a) für die erste Vorhanglage und einer weiteren Dosiereinrichtung (3b) für die weitere Vorhanglage. Durch diese spezielle Ausführungsform kann in den beiden Lagen unterschiedliche Streichfarbe verwendet werden, was eine genaue Abstimmung auf die notwendigen Eigenschaften der verschiedenen Lagen ermöglicht. Der zweilagige Vorhangstrich sorgt für eine gute und gleichmäßige Abdeckung der Faserstoffbahn. In der ersten Vorhanglage, die direkt auf dem Papier zu liegen kommt, kann eine Streichfarbe mit weniger hochwertigem Pigment zur Grundabdeckung verwendet werden, während in der zweiten Vorhanglage zur Feinabdeckung Pigment mittlerer bis hochwertigerer Qualität verwendet werden kann.In the adjoining precalender 2, the fibrous web is smoothed so that its surface has good properties for subsequent non-contact coating. This is done in a curtain coater (3), which in the illustrated embodiment sweeps the top of the fibrous web with a two-ply curtain coat with pigment-containing paint. The two-layer curtain coating is produced by the interaction of a first metering device (3a) for the first curtain layer and a further metering device (3b) for the further curtain layer. By means of this special embodiment, different coating colors can be used in the two layers, which allows precise matching to the necessary properties of the different layers. The two-ply curtain coating ensures good and even coverage of the fibrous web. In the first curtain layer, which lies directly on the paper, a coating color with less high quality pigment can be used for the base coverage, while in the second curtain layer for fine coverage, medium to higher quality pigment can be used.
Im Anschluss an das Streichen wird die Strichschicht und die Faserstoffbahn zunächst kontaktlos getrocknet, beispielsweise mit IR-Trocknern (4a), die einseitig oder beidseitig der Bahn vorgesehen sein können. Alternativ oder ergänzend können je nach aufgetragener Strichmenge und je nach Streichfarbe auch Lufttrockner eingesetzt werden. Sobald die Oberfläche so angetrocknet ist, dass die Strichschicht auch im Kontakt mit einer Heizfläche nicht mehr beschädigt werden kann, wird die Strichschicht und die Faserstoffbahn in einer zweiten Nachtrockenpartie wieder mithilfe von beheizten Trockenzylindern (30) getrocknet. Diese Nachtrockenpartie dient auch zur Reduzierung einer eventuellen Rollneigung der Faserstoffbahn aufgrund des einseitigen Streichens und Trocknens.Following the painting, the coating layer and the fibrous web are first dried without contact, for example with IR driers (4a), which may be provided on one or both sides of the web. Alternatively or additionally, air dryers can also be used, depending on the amount of coating applied and the coating color. Once the surface has dried so that the coating layer can no longer be damaged even when in contact with a heating surface, the coating layer and the fibrous web are dried again in a second after-dryer section by means of heated drying cylinders (30). This after-dryer section also serves to reduce any curling of the fibrous web due to one-sided coating and drying.
In der Klingenstreicheinrichtung 6 wird ein weiteres Mal die Oberseite der Faserstoffbahn mit pigment-haltiger Streichfarbe gestrichen, um eine Deckschicht zu bilden. Hierzu wird eine Streichfarbe mit hochwertigem Pigment verwendet, da die Deckschicht die später zu bedruckende Lage darstellt. Die Klingenstreicheinrichtung 6 ist mit einem Rakelstab dargestellt, der die überschüssige Streichfarbe abstreift. Alternativ können auch flexible oder steife Klingen verwendet werden. Vorteilhaft für Glätte, Glanz und Bedruckbarkeit der Deckschicht ist, dass die Klingenstreicheinrichtung nicht kontaktlos arbeitet, sondern dass die Deckschicht durch den Rakelstab oder die Klinge egalisiert und mit einer sehr glatten Oberfläche versehen wird.In the blade coater 6, the upper side of the fibrous web with pigment-containing coating color is once more painted to form a cover layer. For this purpose, a coating color is used with high-quality pigment, since the top layer is the later to be printed layer. The Blade coater 6 is shown with a doctor bar, which strips off the excess coating color. Alternatively, flexible or rigid blades may be used. Advantageous for smoothness, gloss and printability of the cover layer is that the blade coater does not work without contact, but that the cover layer is leveled by the doctor blade or the blade and provided with a very smooth surface.
Im Anschluss an das weitere Streichen in der Klingenstreicheinrichtung 6 wird die Strichschicht und die Faserstoffbahn wiederum kontaktlos getrocknet. Dargestellt sind IR-Trockner 4b und Lufttrockner 5, wobei auch nur IR- oder nur Lufttrockner denkbar wären. Sobald die Oberfläche wieder ausreichend trocken ist folgt eine dritte Nachtrockenpartie 40, in der mithilfe von Trockenzylindern fertig getrocknet wird.Following the further brushing in the blade coater 6, the coating layer and the fibrous web are in turn dried without contact. Shown are IR dryer 4b and air dryer 5, with only IR or only air dryer would be conceivable. As soon as the surface is sufficiently dry again, a third after-
Der letzte Verfahrensschritt, bevor die fertige Faserstoffbahn in einer Aufrollung 8 zu großen Rollen aufgewickelt wird, ist eine Nachglättung, die in einem Fertigkalander 7 erfolgt. Dargestellt ist ein Softkalander mit einem Kalanderspalt.The last process step, before the finished fibrous web is wound up in a
Sowohl vor dem Vorkalander 2 als auch vor dem Fertigkalander 7 können Befeuchtungseinrichtungen vorgesehen sein, die Dampf und/oder Wasser auftragen, damit Glätte und Glanz weiter verbessert und eine eventuelle Rollneigung weiter verringert werden.Both before Vorkalander 2 and before the Fertigkalander 7 moistening facilities may be provided which apply steam and / or water, so that smoothness and gloss further improved and any curl can be further reduced.
In diesem Ausführungsbeispiel ist eine online-Maschine und ein online-Verfahren dargestellt, d.h. alle Verfahrensschritte zum Herstellen und Veredeln der Faserstoffbahn, insbesondere Stärkeauftrag, Streichen, Glätten, erfolgen in einer Maschine nacheinander ohne Zwischenaufrollung. Nicht dargestellt sind das Umrollen und Rollenschneiden, was immer in einer separaten Maschine erfolgt. Dies gehört erfindungsgemäß aber auch nicht mehr zum Herstellen und Veredeln, da hierbei die Eigenschaften der Faserstoffbahn nicht mehr verändert werden.In this embodiment, an online machine and an online process is shown, ie all process steps for producing and refining the fibrous web, in particular starch application, brushing, smoothing done in a machine successively without Zwischenaufrollung. Not shown are the rewinding and slitting, which always takes place in a separate machine. However, according to the invention, this also no longer belongs to the manufacture and finishing, since in this case the properties of the fibrous web are no longer changed.
- 11
- FilmauftragsvorrichtungFilm applicator
- 11
- b Airturnb Airturn
- 22
- Vorkalanderpre-calender
- 33
- VorhangstreicheinrichtungCurtain coater
- 3a3a
- Dosiereinrichtung für erste VorhanglageDosing device for first curtain position
- 3b3b
- weitere Dosiereinrichtung für weitere Vorhanglagefurther metering device for further curtain position
- 4a4a
- IR-TrocknerIR dryer
- 4b4b
- weitere IR-Trockneradditional IR dryers
- 55
- Lufttrocknerair dryer
- 66
- KlingenstreicheinrichtungBlade coater
- 77
- FertigkalanderFertigkalander
- 88th
- Aufroll ungRoll up
- 99
- Papierbahnpaper web
- 1010
- Vortrockenpartiepre-dryer
- 2020
- erste Nachtrockenpartiefirst night dry party
- 3030
- zweite Nachtrockenpartiesecond night drying section
- 4040
- dritte Nachtrockenpartiethird night dry party
Claims (9)
- Method for manufacturing a white-top liner or a white-top test liner fibrous web (9), wherein the fibrous web is manufactured with multiple layers in a forming section, dewatered in a pressing section, and dried in a pre-drying section (10),
characterized in that
starch is subsequently applied simultaneously to both sides of the fibrous web in a film-application device (1), and in that the fibrous web in the processing direction thereafter in a curtain-coating installation (3) is coated with pigment-containing dye on only one side, and in that the fibrous web (9) after coating in the curtain-coating installation (3) in a blade-coating installation (6) is again coated with pigment-containing dye on one side. - Method according to claim 1,
characterized in that
the fibrous web (9) directly after the pre-drying section (10) is impinged with starch in the film-application device (1) and in the processing direction only thereafter, but still prior to the curtain-coating installation (3) is smoothed in a preliminary calender (2). - Method according to one of the preceding claims,
characterized in that
the fibrous web (9) in the curtain-coating installation (3) is coated with a two-layered or multi-layered curtain coating, wherein a dissimilarly composed coating dyes are used for at least two of the layers of the curtain coating. - Method according to one of the preceding claims,
characterized in that
in the film-application device (1) a quantity of starch in terms of the dry weight of the starch of 1 to 4 g/m2 is applied to each side of the fibrous web (9). - Method according to one of the preceding claims,
characterized in that
in the curtain-coating installation (3) a quantity of coating in terms of the dry weight of the coating of 10 to 30 g/m2, in particular of 12 to 25 g/m2, is applied. - Method according to one of the preceding claims,
characterized in that
all method steps up to the finished paper, in which the fibrous web is coated or dried or smoothed, are performed successively in-line in one machine without intermediate winding, wherein the one machine extends from the forming section up to winding (8) of the finished paper. - Machine for manufacturing a multi-layered white-top liner or a white-top test liner fibrous web (9), in particular according to the method described in one of the preceding claims, which machine has a forming section, a pressing section, and a pre-drying section (10),
characterized in that
said machine in the running direction of the fibrous web (9) has in succession a film-application device (1) applying starch to both sides, then a curtain-coating installation (3), and then a blade-coating installation (6). - Machine for manufacturing a multi-layered fibrous web (9), in particular a paper or cardboard web, in particular according to the method described in one of claims 1 to 6, which machine has a forming section, a pressing section, and a pre-drying section (10),
characterized in that
said machine in the running direction of the fibrous web (9) has in succession a film-application device (1) applying starch to both sides, then a preliminary calender (2), and then a curtain-coating installation (3). - Machine according to Claim 7 or 8,
characterized in that
the machine is implemented as an in-line machine, wherein the fibrous web (9) from the forming section up to winding (8) of the finished paper may be successively guided in-line through all application and coating installations, drying sections, and calenders or smoothing installations, without the machine having intermediate winding therebetween.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010038530 DE102010038530A1 (en) | 2010-07-28 | 2010-07-28 | Process for producing a fibrous web, in particular a paper or board web |
PCT/EP2011/058262 WO2012013384A1 (en) | 2010-07-28 | 2011-05-20 | Process for producing a fibrous web, in particular a paper or board web |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2598694A1 EP2598694A1 (en) | 2013-06-05 |
EP2598694B1 true EP2598694B1 (en) | 2016-03-30 |
Family
ID=44486078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP11720775.3A Revoked EP2598694B1 (en) | 2010-07-28 | 2011-05-20 | Process for producing a fibrous web, in particular a paper or board web |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2598694B1 (en) |
CN (1) | CN103025958B (en) |
DE (1) | DE102010038530A1 (en) |
WO (1) | WO2012013384A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2014208934A (en) * | 2013-03-28 | 2014-11-06 | 日本製紙株式会社 | Coated white paperboard and production method thereof |
JP6553926B2 (en) | 2015-04-09 | 2019-07-31 | キヤノン株式会社 | Imprint apparatus, imprint method, and article manufacturing method |
DE102017118218A1 (en) * | 2017-08-10 | 2019-02-14 | Voith Patent Gmbh | MACHINE AND METHOD FOR PRODUCING A FIBROUS WEB |
DE102019134177A1 (en) * | 2019-12-12 | 2021-06-17 | Voith Patent Gmbh | Machine and method for producing a fibrous web |
Citations (5)
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WO2001054828A1 (en) | 2000-01-26 | 2001-08-02 | Tetra Laval Holdings & Finance S A | Method of manufacturing a multi-layer packaging laminate and packaging laminate obtained by the method |
DE102005021983A1 (en) | 2005-05-12 | 2006-11-16 | Voith Patent Gmbh | Multilayer coating of running board with a liquid or paste medium involves application of a precoat and a top coat especially using curtain and optionally also blade coating |
EP1908878A1 (en) | 2005-06-20 | 2008-04-09 | Daio Paper Corporation | Process for producing coated paper and coated paper |
DE102008054908A1 (en) | 2008-12-18 | 2010-06-24 | Voith Patent Gmbh | Process for the multiple coating of a fibrous web, in particular a movable board web and apparatus for the treatment and / or finishing of fibrous webs, in particular for the multi-layer application of liquid or pasty application media |
WO2011151234A1 (en) | 2010-06-02 | 2011-12-08 | Voith Patent Gmbh | Method for producing a coated multilayer fibrous web |
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US5792317A (en) * | 1996-02-07 | 1998-08-11 | Gl&V-Paper Machine Group, Inc. | Wet end starch application |
FI105118B (en) * | 1999-05-12 | 2000-06-15 | Valmet Corp | Method for manufacture of paper or cardboard web and a paper or cardboard making machine |
FI111281B (en) * | 2001-12-12 | 2003-06-30 | Metso Paper Inc | Cardboard finishing procedure |
EP1501982A1 (en) * | 2002-05-03 | 2005-02-02 | Imerys Minerals Limited | Paper coating pigments |
FI20045110A (en) | 2004-03-30 | 2005-10-01 | Metso Paper Inc | Process for making coated fiber web |
DE102006044822A1 (en) * | 2006-09-20 | 2008-04-03 | Voith Patent Gmbh | Process for producing a coated paper, cardboard or other fibrous web |
DE102007009702A1 (en) * | 2007-02-28 | 2008-09-04 | Voith Patent Gmbh | Process for the production of a coated fibrous web, in particular of paper or cardboard |
DE102007009398A1 (en) * | 2007-02-28 | 2008-09-04 | Voith Patent Gmbh | Process for the production of a coated fibrous web, in particular of paper or cardboard |
DE102008041418A1 (en) * | 2008-08-21 | 2010-02-25 | Voith Patent Gmbh | Curtain coater |
-
2010
- 2010-07-28 DE DE201010038530 patent/DE102010038530A1/en not_active Withdrawn
-
2011
- 2011-05-20 CN CN201180036461.9A patent/CN103025958B/en active Active
- 2011-05-20 WO PCT/EP2011/058262 patent/WO2012013384A1/en active Application Filing
- 2011-05-20 EP EP11720775.3A patent/EP2598694B1/en not_active Revoked
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WO2001054828A1 (en) | 2000-01-26 | 2001-08-02 | Tetra Laval Holdings & Finance S A | Method of manufacturing a multi-layer packaging laminate and packaging laminate obtained by the method |
DE102005021983A1 (en) | 2005-05-12 | 2006-11-16 | Voith Patent Gmbh | Multilayer coating of running board with a liquid or paste medium involves application of a precoat and a top coat especially using curtain and optionally also blade coating |
EP1908878A1 (en) | 2005-06-20 | 2008-04-09 | Daio Paper Corporation | Process for producing coated paper and coated paper |
DE102008054908A1 (en) | 2008-12-18 | 2010-06-24 | Voith Patent Gmbh | Process for the multiple coating of a fibrous web, in particular a movable board web and apparatus for the treatment and / or finishing of fibrous webs, in particular for the multi-layer application of liquid or pasty application media |
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Also Published As
Publication number | Publication date |
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DE102010038530A1 (en) | 2012-02-02 |
EP2598694A1 (en) | 2013-06-05 |
CN103025958B (en) | 2016-04-13 |
WO2012013384A1 (en) | 2012-02-02 |
CN103025958A (en) | 2013-04-03 |
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