EP2163687A1 - Procédé de préparation de milieux d'application liquides ou pâteux, notamment amidon destiné à l'application sur une bande de matière fibreuse, notamment bande de papier ou de carton et système d'application - Google Patents

Procédé de préparation de milieux d'application liquides ou pâteux, notamment amidon destiné à l'application sur une bande de matière fibreuse, notamment bande de papier ou de carton et système d'application Download PDF

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Publication number
EP2163687A1
EP2163687A1 EP09169904A EP09169904A EP2163687A1 EP 2163687 A1 EP2163687 A1 EP 2163687A1 EP 09169904 A EP09169904 A EP 09169904A EP 09169904 A EP09169904 A EP 09169904A EP 2163687 A1 EP2163687 A1 EP 2163687A1
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EP
European Patent Office
Prior art keywords
application
viscosity
starch
medium
coating
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.)
Granted
Application number
EP09169904A
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German (de)
English (en)
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EP2163687B1 (fr
Inventor
Erich Brunnauer
Wilhelm Gansberger
Robert Kling
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
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Voith Patent GmbH
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Publication date
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Publication of EP2163687A1 publication Critical patent/EP2163687A1/fr
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Publication of EP2163687B1 publication Critical patent/EP2163687B1/fr
Not-in-force legal-status Critical Current
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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

Definitions

  • the invention relates to a process for the preparation of liquid or pasty application media, in particular starch for application to a fibrous web, in particular a paper or board web, in detail with the features of the preamble of claim 1; Furthermore, an order system.
  • the application medium consists at least of strength and a fluid.
  • starch is a high molecular weight, natural polymer that enhances hydrogen bonding between paper fibers through chemical hydration.
  • Industrially starch is obtained almost exclusively from wheat, corn, rice and potatoes. In the production, the crude vegetable product is crushed and ground and usually suspended in water. By filtration, centrifugation, floating the various components are separated. Used in addition to native and modified starches, the modification can be done physically or chemically.
  • native and modified starches are used both in the paper pulp and as spray starch and in the surface coating by gluing in the size press and painting. The starches act as a binder, retention aid and improve dry strength, gloss, printability and stiffness.
  • the starch is used in the "wet end" area, ie wet end of the paper machine or applied in an applicator, which is downstream of the dryer section, applied to the surface of the fibrous web.
  • the at least a device for applying a fluid application medium, in particular starch has.
  • the application medium, in particular in the form of starch is sprayed on both sides of the still wet fiber fleece in the area of the dryer section of a paper machine. This gelatinises in the first phase of drying and sticks the fibers, which then increases the paper strength.
  • a very thin layer which consists primarily of starch, applied to the base paper.
  • starch liquor To apply the starch liquor, one uses different application aggregates, for example rollers, slot nozzles, spray nozzles.
  • a thin paste of dissolved starch which is also referred to as a glue liquor, is applied. This may also contain a not very high proportion of pigment.
  • glue liquor The most commonly used are glue or film presses or a coating roll unit installed inside the dryer section of the paper machine.
  • the surface sizing coating covers the paper with a thin layer of starch, which still reveals the contours of the fibrous mesh structure of the raw paper.
  • a starch paste is placed on the fibrous web which penetrates between the paper fibers and positively influences a number of paper properties such as stiffness, strength, absorbency or smoothness.
  • starch Since starch is used in the starch liquor together with water on the paper, in order to bring in as little water as possible, it is then returned to the after-dryer section must be evaporated, the starch applied with the highest possible solids content, which, however, at the same time in turn high viscosities and counteracts the desired degree of penetration. On the other hand, as the degree of degradation decreases, the viscosity of the starch liquor decreases, but at the same time this also leads to an undesirable decrease in the binding power of the starch. An increase in the temperature of the application medium in turn leads to a known reduction in viscosity. Therefore, starch application units are often operated at very high temperatures, in areas up to 85 ° C, which, however, can endanger the operating personnel.
  • the starch When applying surface sizing to a film press comprising two nip forming film rolls through which the fibrous web is passed, the starch is applied to the surfaces of the film rolls and the thickness is determined by means of a leveling device, in particular a squeegee. Due to the prevailing conditions, a very high shear rate and dehydration of the application medium occur in the gap between the leveling device and the film roller, which increases its viscosity. However, it is desirable to have a low viscosity in this range.
  • the invention is therefore an object of the invention to provide a method for providing a coating medium containing starch, which meets the different requirements of the application medium in the order range, with a high penetration capacity of Priority should be given.
  • the solution according to the invention should be characterized by a low design and control engineering effort.
  • the viscosity of the suspension in the applicator in particular the exit from this or the impingement on the fibrous web by the temporary introduction or Exposure of shear forces on the liquid or pasty application medium in the region of the feed line, which comprises the processing system and the application device, but reduced before exiting the applicator.
  • Starch in particular a liquid application medium which consists of starch and fluid, in particular water, is a non-Newtonian fluid which has the property of reducing the viscosity at a constant shear over a time axis t.
  • the viscosity decreases under the influence of increasing shear stresses ⁇ or shear rates D.
  • ⁇ or shear rates D the viscosity decreases.
  • hysteresis a sometimes considerable time delay, hysteresis, occurs.
  • the viscosity decreases at a constant shear stress ⁇ with increasing test time t.
  • Thixotropy is thus understood to be a time-dependent gel-sol-gel transformation which can be carried out under isothermal conditions or the behavior of suspensions whose flow resistance moves towards the initial resistance once the shear stress has ended.
  • time dependence is understood that the speed of change of all or only certain particles of the investigated system is lower than the shear rate. In the present case, this concerns at least the amount of starch.
  • the shear causes a deformation under the action of a force. This acts parallel to the corresponding liquid layer.
  • the introduction of constantly high shear forces in the application medium over a predefined period of time is determined as a function of the size of the exposure region and the flow rate of the application medium.
  • the magnitude of the shear forces and / or the duration of time is chosen as a function of a desired viscosity reduction of the application medium.
  • the area of action of the shear forces within the feed path is chosen such that, starting from an intrinsic viscosity ⁇ base of the application medium before the exposure region in the feed path depending on the size of the present viscosity after completion of the action of the shear forces and the viscosity change behavior of the application medium between Einwirk Symposium and Application area on the fibrous web or at the outlet of an applicator device, the application medium in the application area or at the outlet from the applicator device has a lower viscosity ⁇ x , as the basic viscosity ⁇ base .
  • the shear forces can be generated in different ways.
  • Conceivable are static and dynamic systems.
  • the dynamic systems are characterized by the fact that here is actively acted upon the application medium, in particular rotor-stator systems, stirrers or other at least for the action provided over a predefined period of action actuated action elements that cause swirling and mixing.
  • Static systems are thereby Characterized that here in the fluidization of the starch to form the application medium, the components to be mixed together are introduced into containers and mixing takes place by changing direction and / or cross-sectional reduction and feeding the other medium.
  • the individual components can be introduced at different speeds. Furthermore, it is conceivable to set the inflow direction differently.
  • the process according to the invention is, as already explained, suitable for the treatment of a starch liquor in the wet-end region of a paper machine, that is to say in particular for the application of spray starch in the region of the press section.
  • a starch liquor in the wet-end region of a paper machine
  • spray starch in the region of the press section.
  • main field of application for surface finishing in a coater which may be an online or offline aggregate.
  • the execution of the commissioned work in the applicator there are no restrictions.
  • Direct application methods are characterized by the direct application of the starch to the fibrous web, for example by means of appropriate spraying devices or commissioned works in the form of curtain coating units.
  • An order commissioned by indirect order are characterized in that they apply the application medium to the fibrous web via an applicator, for example a roller.
  • Application examples are in particular size presses.
  • the starch liquor as a whole with a higher solids content, wherein the temperature and the degree of degradation can be maintained and the viscosity can be kept constant.
  • a reduction of the amount of water to be evaporated is achieved. Due to the low rewetting of the base paper is also achieved a better runability and it is also possible to reduce the drying capacity and thus significantly improve the energy balance of the overall system.
  • the solution according to the invention thus makes it possible to utilize the advantages of a high-viscosity starch liquor, ie high solids content, low degree of degradation and lower temperatures for the application of the application medium, without having to accept the negative properties of the high viscosity, since the viscosity is only above a certain level Duration is reduced, which is dependent on the introduction of shear forces and builds up delayed after completion and thus when applying the application medium is present with a lower viscosity than would be present without introducing the shear forces in the starch processing system.
  • the starch preparation essentially comprises the following process steps: dispersion, gelatinization and dilution.
  • starch is mixed with a fluid, in particular water.
  • the gelation or digestion of the dispersion takes place in the subsequent process, which is also referred to as cooking and usually involves a steam treatment.
  • a gelatinization of the starch that is, a dissolution at a certain temperature.
  • the starch paste is diluted and fed to the applicator or post-treated, for example, dried and stored in a reservoir and later fluidized by addition and mixing with a fluid, especially water.
  • the introduction of the shear forces takes place before the application device, in particular the commissioned work and after the dilution stage.
  • the introduction of shear forces is also conceivable immediately after gelatinization or during enzymatic degradation.
  • a centrifugal reactor is used. This works on the rotor-stator principle.
  • the centrifugal reactor introduces a relatively high mechanical energy into the mixture. This in turn leads to a reduction in steam consumption in the starch cooker, because the reaction temperature is lower than when using a simple agitator.
  • the centrifugal reactor generates with the interlocking teeth of the rotor and stator mixing and redeployment of the application medium, wherein by means of mechanical high frequency, which results from the interaction of the teeth and tooth spaces, energy is introduced into the processing mass.
  • the Device operates preferably continuously, that is, the application medium can be generated as soon as possible, taking into account the transport path to the application device during the production of the paper web.
  • FIG. 1 illustrates in schematic highly simplified representation of the basic structure of an application system 1 for applying a liquid or pasty Application medium 2, which contains at least one fluid and starch, on a fibrous web 3 or a fibrous web.
  • the application system 1 comprises aquestmediumaufleungs- and supply system 4 and an applicator 5, in particular in the form of a commissioned work, which are interconnected.
  • an applicator 5 in particular in the form of a commissioned work, which are interconnected.
  • According to the application medium 2 before the outlet 6 or the individual outlets 6.1 to 6.n exposed to the applicator specifically high shear forces, which lead to a change in viscosity.
  • a device 7 for generating or introducing shear forces provided which acts on the medium to be applied in the form of the application medium 2 and the viscosity of the application medium 2, in particular of the fluidized starch, which is also referred to as a starch liquor, influenced for a limited time.
  • the location of the action of the shear forces is referred to as the exposure region 9.
  • the size of the Einwirk Schemees 9 characterized in dependence on the flow rate, the duration of the action of the shear forces.
  • At least one device 7 for generating and introducing shear forces acts on the application medium 2 in the action region 9 over a predefined period of time t, in order to temporarily influence, in particular reduce, the viscosity ⁇ of the application medium 2.
  • the shear force is kept constant over the predefined time period t, which corresponds to the exposure time.
  • the impact area 9 of the device 7 for applying shear forces is selected such that, depending on the time t of the action of shear forces, the type of starch and the properties of the application medium 2 itself, such as solids content FG, temperature T and degree of degradation AG, the reduced viscosity at least up to the outlet 6 from the applicator 5 or the impact with the free-jet spray or curtain application to the fibrous web 3 in the impact area 10 is maintained.
  • the knowledge is used that strength, in particular fluidized starch, behaves thixotropically, ie the change in viscosity ⁇ is time-dependent.
  • a liquid Application medium 2 which consists of starch and water
  • a non-Newtonian fluid which has the property of reducing the viscosity ⁇ at a constant shear over a time axis t.
  • the viscosity decreases under the influence of increasing shear stresses ⁇ or shear rates D.
  • a sometimes considerable time delay, hysteresis occurs.
  • the viscosity decreases at a constant shear stress ⁇ with increasing contact time t.
  • the coating medium 2 is characterized by a basic viscosity ⁇ base . By acting on it can be reduced.
  • the viscosity at the end of the shearing process is designated ⁇ 1 .
  • the present viscosity at the exit of the applicator device 5, and when hitting the fibrous web 3 is denoted by ⁇ x.
  • the duration of the action of shear forces is selected such that the viscosity increases up to the outlet 6 from the applicator 5 or the impingement on the fibrous web with respect to ⁇ 1 in the direction of the initial state of the intrinsic viscosity ⁇ basis , that in the application area 10 a lower Viscosity ⁇ x as before the action of the device 7 in the application medium 2, but a higher viscosity than at the end of the shearing process ⁇ 1 is given.
  • the viscosity ⁇ x is as a function of the properties of the coating medium 2 before the action of shear forces, in particular the basic viscosity ⁇ base before the action of the device for generating shear forces 7, the solids content FG, the degree of degradation AG and the temperature T, the time t Influence of the shear forces and the temporal behavior of the change in viscosity after completion of the action of the shear forces writable.
  • the viscosity in the application area 9 is dependent on the hysteresis behavior of the application medium 2 and the residence time between exposure area 9 and application area 10.
  • Application area 10 is the location at which the application medium 2 impinges on the fibrous web 3, in particular a paper or board web or in film presses in the order gap between doctor blade and roller.
  • Starch is insoluble in water in its native form and is irreversibly converted into a soluble form only by heating above a certain temperature, the so-called gelatinization temperature.
  • This starch paste from swelling starch can be converted, for example by drum drying or spray drying, into a dry, storable form, which gives a cold water-soluble product which can be mixed with a fluid.
  • Alteration of free hydroxyl groups on the starch molecule by incorporation of ester groups can lower the gelatinization temperature, improve solution stability and cold flowability, and prevent retrogradation.
  • the process steps dispersion, gelatinization and possibly subsequent dilution, after which the application medium 2 is present, continuously before the order.
  • swelling starch can be stored as cold water-soluble precursor for the application medium and is fluidized as required by dissolution in a fluid, this process can be done via different facilities in one or more stages, usually via mixing devices and with additional thermal energy input , The preparation of the swelling starch is then also preferably continuous and coordinated with respect to the order quantity and the properties of the application medium 2 for this.
  • the duration t of the action of the shear forces can be determined by the length or size of the action region 9. It is also conceivable to additionally apply a changing shear rate, so that a superposition of a time dependence and a dependence on the magnitude of the shear rate is given.
  • the device 7 for generating these parameters of the application medium 2 in the application area 10 of shear forces there are a plurality of possibilities for the arrangement of the device 7 for generating these parameters of the application medium 2 in the application area 10 of shear forces.
  • FIGS. 2a to 2c illustrate in schematic simplified representation of basic possibilities of the arrangement of the device 7 for generating shear forces.
  • theprocessmediumaufleungs- and supply system 4 which may be designed as conventional starch processing system 11, described only in terms of its fundamentally functional structure, which here, since it is conventional starch processing systems, not closer to the individual modification and expansion options, but only reference is made to the prior art of these systems and only the basic facilities are called.
  • the application medium preparation and supply system 4 comprises a device 12 for starch storage, from which a dispersing device 13 is supplied to the dispersion of starch in the starch storage 12 usually present in powdered starch and produces a starch slurry, which is gelatinized in a subsequent gelatinization step in a gelatinization device 14.
  • the dispersing device 13 and the gelatinization device 14 can be combined to form a structural unit in the form of a single device or be present as separate devices.
  • the pasting device 14 is optionally followed by a dilution device 15, in which the dissolved starch is further diluted.
  • a direct supply can be effected by the direct connection to the application device 5 or, reproduced here by interrupted representation, via an intermediate tank or container 16 with intermediate storage of the swelling starch to the application device 5 become.
  • the starch paste is converted from swelling starch, for example, into a dry, storable form, whereby a cold water-soluble product is obtained, which can be mixed with a fluid in a dilution device 15.
  • the Starch paste also remain temporarily in the intermediate tank 16 without transfer to a dry form and possibly subsequently diluted, it then being necessary to spend the dissolved starch again to a corresponding temperature T before the order in order to achieve a certain viscosity.
  • the device for generating shear forces 7 and thus the impact area 9 can according to FIG. 2a in the applicator 5, for example in a distributor for the supply of individual applicator outlets 6.1 to 6.n, the arrangement being such that the duration of action is dependent on the flow rate and the Einwirkkey dimensioned such that the desired viscosity reduction by the shear forces on impact on the fibrous web 3 is still given.
  • the means for generating shear forces between the Verkleistanss Rhein 14 and the applicator 5 is arranged. This can be done anywhere in the system. In this case, the arrangement can take place, for example, in a transverse distributor 17 arranged upstream of the application device 5 for the application device 5. Another possibility, shown here by dash-dotted lines, is to integrate the device, which is denoted by 7 ', in the dilution stage, in particular of the dilution device 15. Also conceivable is an additional provision of a separate device before or after the dilution device 15 and the gelatinization device 14.
  • the arrangement of the gelatinization device 14 is arranged directly downstream or combined with it.
  • FIGS. 2a to 2c illustrate only examples, conceivable is any arrangement between Verkleistanss worn and outlet opening on the applicator 5.
  • embodiments are preferably selected, which are characterized by minor modifications in the overall system and characterized by simple installation and retrofitting options, ie in particular possibilities of arrangement outside the applicator. 5 ,
  • the possibilities for forming the device for generating shear forces 7 are varied. These are preferably designed as mechanical systems or flow mixers. The following figures illustrate only a few examples and are therefore not exhaustive.
  • agitators 18 as exemplified in the FIG. 3a that is to say, the use of an action element which has contact surfaces 19 which effect a mixing and application of shear forces to the application medium 2 by rotation or another movement.
  • Agitators 18 or other single-shaft or multi-shaft mixers with horizontal or vertical orientation can additionally be provided in the feed section 8, for example by guiding over an additional container in which the agitator or the other mechanical mixers are arranged.
  • this may be a rotor-stator system, which is denoted by 20 and may be embodied in various ways.
  • the application medium 2 is moved due to the rotation of a rotor 21 against a stationary wall 22 and deflected at this again.
  • the rotor-stator system 20 can be modified, in particular by special design of the rotor 21 and the stator 22. It is conceivable to provide the rotor with teeth that engage him complementary gears on the stator to form a gap or gap, wherein at this distance, the movement of the fluid is made and thereby the shear rate can also be increased.
  • the static system is designed in the form of a static mixer 23, which comprises at least two inputs 24 and 25 and an outlet 26, wherein via the input the undiluted application medium 2 or not yet fluidized, but gelatinized starch medium is introduced and with one over the other Input 25 registered fluid is mixed, wherein the mixing is carried out such that here shear forces act on the starch molecules.
  • Static mixers 23 can be realized, for example, via a valve mixing section or mixing chambers provided with bores, lamellae or intermeshing webs. The concrete selection depends on the boundary conditions of the application. Again, any possibility applies between the gelatinization device 14 and the application device 5 for the arrangement.
  • FIGS. 1 to 4 Illustrated embodiments illustrate only basic principles that do not describe a detailed structural design.
  • the possibilities according to FIG. 2 with the statements according to FIG. 3 can be combined arbitrarily. It is conceivable to use one, but preferably several such shear forces generating devices in the overall system 1, in particular in order to increase the exposure time by increasing the Einwirkux can.
  • FIG. 5 illustrates an example of a possible embodiment of a combined unit 27 of a Gelkleist ceremoniess issued 14 and the means 7 for generating shear forces, which is the Verdkleist ceremoniess worn 14 directly downstream.
  • the combined device comprises a starch cooker 28 as gelatinizing device 14, in which a steam treatment of an aqueous starch dispersion, which is supplied via an inlet 37 from the dispersing device 13, takes place, whereby the starch swells to form a paste.
  • the steam is supplied via a steam inlet 29 of the gelatinization device 14.
  • an enzyme E is fed via a corresponding device.
  • the centrifugal reactor 30 which functions on the rotor / stator principle, has for this purpose a conical reaction path 31 into which, for example, teeth 32 of the stator 33 and teeth 34 of the rotor 35 protrude.
  • the reaction section 31 is, for example, of low volume, but has a high reaction efficiency.
  • Such an embodiment of a machine is for example in the DE 102 51 599 B3 whose disclosure content is fully incorporated herein by reference.
  • Such centrifugal reactor systems are available under the name Cavitron TM from Cavitron. This embodiment represents a possible embodiment for the arrangement of the device 7 of the shear forces. This is downstream of the gelatinization device 14.
  • the solution according to the invention of providing a device for applying shear forces offers a large number of possibilities for influencing the properties, in particular for controlling the properties of the application medium 1 containing starch, in the application region 10 on the fibrous web.
  • the individual parameters influencing the property can be optimized with regard to the possibility of a time-limited reduction of the viscosity in order to achieve optimum application properties. This is controlled, with additional effort also regulated.
  • the time duration t of the action of shear forces is selected such that the viscosity increases to the exit 6 from the applicator 5 or the impingement on the fibrous web 3 relative to ⁇ 1 in the direction of the initial state of the intrinsic viscosity ⁇ base , that in the application area 10th a lower viscosity ⁇ x than before the action of the device 7 on the application medium 2 in the area of action 9, but a higher viscosity than at the end of the shearing process ⁇ 1 is given.
  • the viscosity ⁇ x is as a function of the properties of the coating medium 2 before the action of shear forces, in particular the basic viscosity ⁇ base before the action of the device for generating shear forces 7, the solids content FG 0 , the degree of degradation AG 0 and the temperature T 0 , the Time t of the action of the shear forces and the temporal behavior of the change in viscosity after completion of the action of the shear forces writable.
  • the viscosity ⁇ x can be detected in the region of the outlet 6 and compared with the required viscosity ⁇ erf , wherein a deviation of the duration of action, eg by extension of the effective distance and / or or the shear rate is carried out with the same duration of action.
  • the application medium 2 may have the viscosity without additional increased required fluid input are applied, after application of the shear forces in the application area 10, the application medium 2 is approximately with the parameters FG 1 , AG 0 , T 0 and ⁇ x , is present.
  • FIG. 6d can be significantly reduced at the same solids content FG 0 , degree of degradation AG 0 and initial viscosity ⁇ base , the temperature T 1 of the application medium in the discharge of the application medium, so that the endangerment of personnel in this area of the machine is no longer given.

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  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
EP09169904A 2008-09-15 2009-09-10 Procédé de préparation de milieux d'application liquides ou pâteux, notamment amidon destiné à l'application sur une bande de matière fibreuse, notamment bande de papier ou de carton et système d'application Not-in-force EP2163687B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008042072A DE102008042072A1 (de) 2008-09-15 2008-09-15 Verfahren zur Aufbereitung von flüssigen oder pastösen Auftragsmedien, insbesondere Stärke zum Auftrag auf eine Faserstoffbahn, insbesondere Papier- oder Kartonbahn und Auftragssystem

Publications (2)

Publication Number Publication Date
EP2163687A1 true EP2163687A1 (fr) 2010-03-17
EP2163687B1 EP2163687B1 (fr) 2012-01-25

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EP09169904A Not-in-force EP2163687B1 (fr) 2008-09-15 2009-09-10 Procédé de préparation de milieux d'application liquides ou pâteux, notamment amidon destiné à l'application sur une bande de matière fibreuse, notamment bande de papier ou de carton et système d'application

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EP (1) EP2163687B1 (fr)
AT (1) ATE542956T1 (fr)
DE (1) DE102008042072A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911179A (en) * 1972-07-03 1975-10-07 Molins Machine Co Inc Method of applying starch adhesive bonding agent
WO1998044200A1 (fr) 1997-03-31 1998-10-08 Beloit Technologies, Inc. Dispositif pour appliquer un materiau de revetement
WO2002004745A1 (fr) 2000-07-07 2002-01-17 Voith Paper Patent Gmbh Procede et dispositif pour l'application sur une face ou sur les deux faces
DE10318028A1 (de) * 2003-04-19 2004-11-04 Voith Paper Patent Gmbh Auftragswerk
WO2006005738A2 (fr) 2004-07-12 2006-01-19 Voith Patent Gmbh Procede pour appliquer un produit d'enduction ainsi que procede et machine pour la fabrication d'une bande de matiere fibreuse

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10251599B3 (de) 2002-11-06 2004-03-04 Cavitron V. Hagen & Funke Gmbh Vorrichtung zur Herstellung von Klebstoffen
DE102004005080A1 (de) 2004-02-02 2005-08-18 Voith Paper Patent Gmbh Kontinuierliche gesteuerte Streichfarbenaufbereitung
DE102004036277A1 (de) 2004-07-27 2006-02-16 Voith Paper Patent Gmbh Maschine zur Herstellung einer Faserstoffbahn mit mindestens einer Vorrichtung zum Aufbringen eines Auftragsmediums

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911179A (en) * 1972-07-03 1975-10-07 Molins Machine Co Inc Method of applying starch adhesive bonding agent
WO1998044200A1 (fr) 1997-03-31 1998-10-08 Beloit Technologies, Inc. Dispositif pour appliquer un materiau de revetement
WO2002004745A1 (fr) 2000-07-07 2002-01-17 Voith Paper Patent Gmbh Procede et dispositif pour l'application sur une face ou sur les deux faces
DE10318028A1 (de) * 2003-04-19 2004-11-04 Voith Paper Patent Gmbh Auftragswerk
WO2006005738A2 (fr) 2004-07-12 2006-01-19 Voith Patent Gmbh Procede pour appliquer un produit d'enduction ainsi que procede et machine pour la fabrication d'une bande de matiere fibreuse

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EP2163687B1 (fr) 2012-01-25
DE102008042072A1 (de) 2010-03-18
ATE542956T1 (de) 2012-02-15

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