EP0784120A2 - Procédé et dispositif pour l'enduction d'une bande de papier - Google Patents

Procédé et dispositif pour l'enduction d'une bande de papier Download PDF

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Publication number
EP0784120A2
EP0784120A2 EP97100214A EP97100214A EP0784120A2 EP 0784120 A2 EP0784120 A2 EP 0784120A2 EP 97100214 A EP97100214 A EP 97100214A EP 97100214 A EP97100214 A EP 97100214A EP 0784120 A2 EP0784120 A2 EP 0784120A2
Authority
EP
European Patent Office
Prior art keywords
coating
paper web
roller
paper
coating station
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.)
Withdrawn
Application number
EP97100214A
Other languages
German (de)
English (en)
Other versions
EP0784120A3 (fr
Inventor
Rudolf Beisswanger
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
JM Voith GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19934302437 external-priority patent/DE4302437A1/de
Priority claimed from DE4302435A external-priority patent/DE4302435A1/de
Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Publication of EP0784120A2 publication Critical patent/EP0784120A2/fr
Publication of EP0784120A3 publication Critical patent/EP0784120A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/14—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling
    • 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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/14—Secondary fibres
    • 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
    • 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
    • D21H23/70—Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod

Definitions

  • the invention relates to a method and an apparatus for coating a paper web. Reference is made to the generic terms of the method claim and the device claim.
  • the invention is based on document (1), in particular on its figure 2.
  • Two application rollers are provided which form a nip with one another through which a paper web runs.
  • a nozzle applicator is assigned to each of the application rollers, each of which applies a coating color film to the outer surface of the respective application roller Roller.
  • the nozzle applicator has a nozzle with two nozzle lips, one of which carries a doctor blade at its free end. This is a rod with a grooved outer surface. This enables a dosed application of coating color to the surface of the roller in question. Accordingly, this is an indirect application method, since the line is first applied to the outer surface of the roller and is transferred from there to the paper web.
  • Waste paper has been used in the manufacture of paper and cardboard for many years, in particular with hygienic paper and newsprint. In contrast, the use of waste paper has so far been low for writing and printing paper.
  • waste paper is very desirable, since waste paper is an abundant pulp that is relatively cheap.
  • the waste paper brings with it technical problems.
  • the strength of papers with high waste paper input is relatively low, on the other hand, waste paper naturally contains contaminants in the form of dust, which is particularly problematic in offset printing machines.
  • the low strength of scrap base paper containing waste paper makes itself unpleasantly noticeable in the coating process.
  • the coating color contains a high proportion of water in the order of 50% of the total coating color. When brushing, a substantial part of this water penetrates into the paper, whereby its strength naturally drops dramatically. This increases the risk of tearing accordingly.
  • the invention is based on the object of specifying a method and a device in order to be able to coat a paper web of low strength, in particular based on waste paper, with high coating color application weights without the risk of tearing.
  • the dryer section has two rows, i.e. it has a plurality of upper and lower drying cylinders, each arranged in two horizontal rows.
  • the paper web is sandwiched between the outer surface of the drying cylinder in question and a dryer fabric.
  • the system shown is followed by a smoothing unit, which is designed as a so-called soft nip calendar.
  • the paper web is deflected vertically downwards on a deflection roller 4.
  • the coating station 5 comprises two rollers 5.1 and 5.2. These are arranged parallel to one another and together form a nip through which the paper web 2 is passed. The two rollers are arranged such that the roller 5.2 is perpendicular to the roller 5.1.
  • the roller 5.1 is assigned a nozzle applicator 5.3 - see DE-GM 8 414 413. This nozzle applicator 5.3 has two machine-wide nozzle lips, not shown here.
  • the second nozzle lip seen in the direction of rotation of roller 5.1 carries a roller doctor with a grooved outer surface.
  • This roller doctor metered the amount of coating color exactly onto the outer surface of the roller 5.1. Exactly this amount of coating color is transferred to the incoming paper web 2 in the nip, and naturally only on one side thereof.
  • a scraper 5.4 is assigned to the roller 5.2.
  • the paper web 2 thus coated on one side passes through the nip, passes around deflecting rollers 4.5, 4.6, 4.7 and 4.8, whereby it passes through a drying station 6.
  • a mini drying section 7 then follows, again with drying cylinders.
  • a second coating station 8 follows. This in turn has two rollers 8.1 and 8.2.
  • the roller 8.1 is in turn assigned a nozzle applicator 8.3, which is constructed analogously to the nozzle applicator 5.3.
  • the other side of the paper web is hereby provided with a line.
  • Another mini dryer group 9 and a rolling device 10 follow.
  • painting is carried out in installments in the manner according to the invention. It is namely in the first coating station 5 that one side of the Paper web completely coated, and then in the second coating station 8 the other side of the paper web.
  • the coating color application weight that is also the final coating color application weight of the page in question is thus applied in the coating station in question.
  • This subdivision of the coating process ensures that relatively little water gets into the paper during the individual coating processes, and that the reduction in the strength of the paper is therefore also relatively minimal.
  • the strength is immediately increased by the fact that a drying process follows the coating process.
  • the second coating station is located at a point at which the paper web has sufficient strength due to the previous drying to survive a new coating process with the corresponding water penetration without tearing.
  • coating base papers can be run with a relatively high amount of waste paper and therefore a relatively low initial strength.
  • the coating color application quantities are up to 8 g / m 2 .
  • the coating stations defined here are used, in which the paper web is provided with an indirect application by transferring the line from the outer surface of the roller to the paper web. It is very important that no doctor element has to be attached to the paper web, because the line has already reached its final thickness and dosage on the outer surface of the roller.
  • the chosen coating station with its indirect application process ensures that the coated side of the paper web is completely sealed with coating color, so that dust and other particles which are Waste paper-based papers adhere to the surface and are wrapped in a perfect way.
  • FIGS. 1a, 1b and 1c are alternative embodiments of the system according to FIG. 1.
  • a distributor element 20.1, 20.2, 20.3 is provided.
  • This can be a round rod of larger or smaller diameter (Fig. 1a or Fig. 1b), or a rod-shaped body with a non-circular cross-section (Fig. 1c).
  • the distributor element can oscillate in its own longitudinal direction, or in the direction of travel of the paper web, or rotate around its own axis in the case of round distributor elements. Rotating oscillation is also possible.
  • the surface can vary widely, e.g. B. completely smooth, polished, grooved, produced from circumferential wires.
  • FIG. 2 The system shown in FIG. 2 is constructed similarly to the system according to FIG. 1.
  • the end of a two-row cylinder dryer section 1 can also be seen here, furthermore a smoothing unit 3, a first coating station 5, one of these downstream driers 6, a dryer section 7 with drying cylinders, a second coating station 8, a further dryer 9, a dryer section 9.1 with drying cylinders and a reeling station 10.
  • the two coating stations 5 and 8 each have two nozzle applicators 5.1, 5.2 or 8.1 and 8.2. This means that the paper web 2 can be coated on both sides in that coating station.
  • the dryers 6 and 9 are air dryers which carry the web freely and bring them to such a dry content (if possible at least 70% dry) until the line in the subsequent cylinder dryer sections 7 and 9.1 is touchable.
  • FIG. 2a shows a modified embodiment of FIG. 2.
  • an infrared dryer 30 is provided, followed by a floating dryer (air dryer) 6.9.
  • coating station 5 has only a single application station 5.1, which is assigned to one of the two rollers of coating station 5.
  • the coating station 5 is followed by a distributor element 20.5.
  • Coating station 8 also has only a single application station 8.1.
  • a distributor organ 20.6 is connected downstream. The application is therefore only one-sided at each coating station 5 or 8.
  • the basic idea of painting on rates in accordance with the invention with subsequent drying on rates can be carried out in different ways: For example, first only one side of the paper web can be coated and then dried, and then the other side of the paper web can be coated and dried.
  • both sides of the paper web can also be coated at the same time, but only with a subset of the total coating.
  • Combinations are also conceivable, for example from a simultaneous two-sided application with partial weight per side, followed by a further one-sided application in a second coating station, this additional application completing the line on one side, and finally followed by a third coating station, in which the dash on the second page is completed.
  • appropriate drying devices must be provided after each coating process. The choice of the drying process and the corresponding drying device is left to the expert. For example, he can use infrared dryers, air-guided dryers or cylinder dryers. In the embodiment according to FIG. 2, for example, the dryers 6 and 9 are equipped with such a high drying capacity that no further drying units are required between the coating station and the cylinder drying device.
  • FIGS. 4 to 11 show schematically conceivable configurations using the invention. All of these configurations have two coating stations in common. For better clarity, only the essential components of the individual configurations are described in more detail.
  • the paper web is fed in the direction of the arrow from below to a first coating station 1, then to a second coating station 2, a first infrared path 3, a second infrared path 4, a suspension rail dryer 5 and finally a dryer section 6.
  • the first serves Coating station 1 for gluing or pigmenting or priming. This is an indirect coating process since a nozzle applicator 1.1 first applies the line to an applicator roller 1.2, which then delivers the line to the paper web.
  • coating color is first applied directly to the paper web in a first nozzle applicator 2.1, followed by a second nozzle applicator for a particularly short dwell time (so-called SDTA principle) with an integrated doctor bar
  • the construction is designed such that both the first nozzle applicator 2.1 and the second nozzle applicator 2.2 can be pivoted with doctor bars 2.3 if necessary, so that nothing is applied to coating station 2 at all.
  • the situation is similar in the system according to FIG. 5.
  • an infrared drying unit 6 and a hot air drying unit 7 are interposed between the first coating station 1 and the second coating station 2.
  • FIGS 4a and 4b represent interesting variants.
  • the nozzle applicator 2.1 can be a so-called SDTA, for example as shown in VOITH special print p 2865 11/92 in Figure 20.
  • This application unit can have a rod-shaped doctor blade with a smooth or profiled outer surface, but also a blade.
  • a so-called "stiff blade” or a "bent blade” can be considered.
  • Application unit 2.1 can also be a nozzle application unit without a doctor element, for applying the coating color in the free jet as a "curtain” on the paper web (so-called “fountain coating”).
  • a nozzle application unit without a doctor element for applying the coating color in the free jet as a "curtain” on the paper web (so-called “fountain coating”).
  • guide rollers 1.5 and 1.6 are provided before and after the coating station 1 for the purpose of precise adjustment of the wrap angle.
  • the counter roller can be moved off.
  • FIGS. 4a and 4b - in particular with regard to the nozzle design, with respect to the roll lifting and with respect to the upstream and downstream guide rolls - can alternatively also be present in all the embodiments according to FIGS. 5 to 11.
  • a roller applicator can also be provided instead of the nozzle applicator 2.1.
  • a so-called grinding job on roller 1.2 can be provided in FIG. 4a, with a difference in speed between the web speed and the peripheral speed of roller 1.2.
  • the differential speed can be 0.1 times the web speed, in both directions.
  • the angle of wrap of the roller 1.2 through the web will generally be between 5 and 25 °.
  • Coating station 1 has a second nozzle applicator, namely the nozzle applicator 1.3, which is assigned to a roller 1.4.
  • an infrared drying device 8 is provided on the side opposite the drying devices 6 and 7.
  • Coating station 1 again has an applicator unit 1.1 with an applicator roller 1.2.
  • Coating station 2 is assigned a first nozzle applicator 2.1 and a second nozzle applicator 2.2 with an integrated doctor bar 2.3. This is followed by a suspension railway dryer 5 and finally a dryer group 6.
  • FIG. 9 is largely the same as that of FIG. 8. However, an infrared drying device 6 and a hot air drying device 7 are interposed on one side of the paper web between the two coating stations 1 and 2.
  • the system according to FIG. 10 differs from that according to FIG. 9 by a symmetrical arrangement of the infrared drying device and the hot air drying device.
  • Devices 6.1, 6.2 and 7.1, 7.2 can be seen on both sides of the paper web.
  • the system according to FIG. 11 is the same as that according to FIG. 10 except for coating station 1.
  • This has two nozzle applicators 1.1, 1.3, which are assigned to the relevant rollers 1.2, 1.4.
  • the intended amount of coating color can be applied with coating station 1, coating station 2 with the nozzle applicator and doctor bar being pivoted away.
  • the intended amount of coating color can be applied by coating station 2 only with the nozzle applicator 2.1.
  • Another variant is the application of a glue or pigment suspension with the nozzle applicator from coating station 1.
  • the SDTA nozzle applicator then applies a secondary coat layer with a coat weight of 4 to 6 g / m 2 , with leveling at the same time Blade or with the stick; the second nozzle applicator 2.1 has left here.
  • the intermediate drying of the line applied with the coating station 1 can be useful.
  • the various infrared drying devices and air drying devices are used for this.
  • coating station 1 contains, as mentioned, two nozzle applicators 1.1 and 1.3. It is particularly expedient here to immediately add infrared drying and air drying. With this application concept it is possible to simultaneously treat both paper sides with a glue or pigment suspension in coating station 1 and to dry them out to such an extent that the coating in coating station 2 can be touched by the counter roller.
  • the top coat for the paper underside can then be applied either with the first nozzle applicator 2.1 or with the downstream SDTA nozzle applicator 2.2.
  • the leveling is carried out using a blade or a stick.
  • ie Appendix 6 two construction principles are combined in such a way that their advantages combine, but the disadvantages do not appear. The details are as follows: The application with a nozzle applicator in an indirect way - ie first on the outer surface of a roller and then on the paper web - has the advantage of the perfect application of coating color without the dreaded squeegee strips. When using waste paper, however, the doctor blade of such a device as a leveling element is problematic.
  • coating station 2 with a nozzle applicator and coating blade or a rod as a leveling element leaves no squeegee marks and is excellent suitable for eliminating the so-called film splitting phenomenon.
  • waste paper containing raw paper is pretreated with the nozzle applicator, while the second coating station with its nozzle applicator and a coating blade ensures the desired coating quality in terms of smoothness, opacity and surface tightness.
  • the solution to this sub-task is that the application devices are arranged immediately after the nip in the free train of the paper web distribution elements.
  • these rubbing elements cause the coating slip to be rubbed in the still flowable state in such a way that a self-contained and largely uniformly coated paper web surface is achieved.
  • this is achieved by a rotating movement of the distribution element and / or its oscillating movement about the longitudinal axis and / or its oscillating movements transversely or longitudinally to the paper web.
  • Figure 12 shows a two-roll press.
  • the two rollers are driven in opposite directions to one another.
  • An application unit 5, 6 for a flowable medium is arranged laterally next to the part of the roller circumference of each roller 1, 2 which runs from bottom to top.
  • the application device 5 applies coating color and the application device 6 glue to the roller.
  • the paper web 4 is guided from top to bottom through the nip 3.
  • a film of a flowable medium is applied to the paper web in the areas 7, 8 which the nip forms with the paper web.
  • this grater is a rotationally symmetrical body 10a, which is designed as a roller and which, with a certain pressure, contacts the body with the coating slip coated paper web is pressed.
  • This roller is rotatably supported and is driven. It rotates about its own axis in the direction of the paper web or in the opposite direction and, due to a further drive, which is not shown in detail here, performs oscillating movements transversely to the paper web.
  • the paper web is then fed to further working devices via a deflecting element, shown here as deflecting roller 11a.
  • a total of 11 drive options can be met with this version.
  • the main distinguishing features are the direction of rotation in relation to the running direction of the paper web and the relative speed between the roller circulation and the paper web speed.
  • roller rotates in the opposite direction to the running direction of the paper web, a rubbing effect can only be achieved by the rotation of the roller, but only along the direction of the paper web running.
  • the additional oscillation of the roller transverse to the paper web direction favors the rubbing effect. Oscillating movements along the direction of the paper web and a combination of longitudinal and transverse movements with respect to the paper web are possible.
  • the roller is normally driven, either in the same direction or in opposite directions with respect to the paper web.
  • the relative speed required here is set to an optimal value.
  • roller If the roller is rotatably supported and is not driven, it can be taken along by the paper web due to its speed. A device that brakes the roller is then necessary in order to achieve the rubbing effect. In addition, it is also expedient here to have the roller perform oscillating movements transverse to the direction of the paper web in order to ensure a good rubbing effect over the entire plane of the paper web.
  • the surface of the roller can be smooth or designed as a profile.
  • Another option is a wire-wrapped roller.
  • Smooth rollers are preferably provided with a Cr cover or paint repellent and wear-resistant coatings, such as. B. Teflon, rubber, polyurethane or ceramic.
  • the roller diameter is preferably 100 to 400 mm.
  • FIG. 13 shows a two-roll press analogous to FIG. A roller 1 and a roller 2, which are arranged axially parallel to one another and rotatably mounted and together form a roller nip 3 for passing a paper web 4.
  • the two rollers are driven in opposite directions to each other.
  • An application unit 5, 6 for a flowable medium is arranged laterally next to the part of the roller circumference of each roller 1, 2 which runs from bottom to top.
  • the paper web 4 is guided from top to bottom through the nip 3.
  • a film of flowable medium is applied to the paper web in the areas 7, 8 which the nip forms with the paper web. Both application devices apply coating color to the surface of the roller.
  • the coating slip is applied to the paper web in the desired thickness.
  • a grater is arranged on both sides for rubbing the coating slip.
  • These distribution elements are a rod in the figure.
  • the surface of the rod can be smooth, the diameter is preferably 10-30 mm. It is also possible to wrap the rod with wire or to give its surface a profile.
  • the rod itself rotates very slowly for the purpose of self-cleaning and to avoid local wear.
  • additional drive options that are not shown in the figure are to be provided for the realization of oscillating movements around the rod axis as well as longitudinally in or transverse to the direction of the paper web or a combination of longitudinal and transverse movements relative to the paper web.
  • the distribution elements are preferably arranged on both sides of the paper web so that they are offset from one another in the running direction.
  • the paper web 4 is passed on to the distribution elements via a deflection device, here a deflection roller 11a.
  • a deflection roller 11a There is also the possibility, in order to avoid the contact of a still wet or damp, coated paper web with the deflecting roller 11a, to provide a drying process between the deflecting roller and the grater.
  • FIG. 14 shows the 2-roll press arrangement already described in FIG. 2 in a modified form.
  • grating members 10a are also arranged on both sides here. These can be designed as described in FIG. 2 or in FIG. 1. Analogously to this, the drive options as in the figures already described can also be implemented.
  • the deflection of the paper web takes place here contactlessly via an air cushion deflection device 11b.
  • This has the advantage that even paper webs still damp from the coating color can be deflected without directly contacting the paper web side still wet from coating color with a deflecting element, and prior intermediate drying is not necessary.
  • the paper web is then dried by means of an infrared device 12a.
  • a further possibility for the subsequent drying is shown in FIG. 14b and consists in subjecting the paper web to a suspension drying 12b after the infrared drying 12a.
  • FIG. 15 The structure and function of the 2-roll press arrangement shown in FIG. 15 essentially correspond to the arrangement described in FIG. 2.
  • the reference symbols are assigned accordingly.
  • Rods with a work surface 10b which is convex in their side view, here designed as hydrobar shoes, are used as the distribution elements.
  • the radius of curvature of the working surface of the rod 10b is preferably chosen to be larger than the radius of the rollers used for it, so that the effective working surface of the grater is larger.
  • the hydrobar shoes can be stationary or equipped with an additional drive for realizing oscillating movements transverse to the paper web, which is not shown in the figure.
  • the surface of the hydrobar shoe can be smooth or can be provided with a profile, as illustrated in FIGS. 16 and 17.
  • the profile will preferably not extend over the entire surface of the hydrobar shoe, but only over the first rising part of the curve in the running direction of the paper web. The following descending part is executed smoothly. This ensures that the top layer roughened with a bump and then rubbed evenly. The paper web is then z. B. supplied subsequent drying facilities.
  • FIG. 16a, 16b and 16c show possibilities for the profile design.
  • the profile of the work surface shown in FIG. 16a is wavy.
  • Figures 16b and 16c illustrate the possibility of using and a rack and a rack profile.
  • Figures 17a, 17b and 17c give an overview of possible profile contours in plan view. Parallel profile contours, profile contours with a pitch and profile contours with changing pitch are conceivable.

Landscapes

  • Paper (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP97100214A 1993-01-29 1993-08-07 Procédé et dispositif pour l'enduction d'une bande de papier Withdrawn EP0784120A3 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4302435 1993-01-29
DE19934302437 DE4302437A1 (en) 1993-01-29 1993-01-29 Paper web coating for low strength recycled paper material - by applying part of coating vol. at station with drying between stations, for strengthening
DE4302437 1993-01-29
DE4302435A DE4302435A1 (en) 1993-01-29 1993-01-29 Paper web coating appts. - has smoother against side of web in free path after leaving gap between applicator rollers
EP93112694A EP0609483B1 (fr) 1993-01-29 1993-08-07 Procédé et dispositif pour l'enduction d'une bande de papier

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP93112694A Division EP0609483B1 (fr) 1993-01-29 1993-08-07 Procédé et dispositif pour l'enduction d'une bande de papier
EP93112694.0 Division 1993-08-07

Publications (2)

Publication Number Publication Date
EP0784120A2 true EP0784120A2 (fr) 1997-07-16
EP0784120A3 EP0784120A3 (fr) 2004-04-14

Family

ID=25922606

Family Applications (2)

Application Number Title Priority Date Filing Date
EP97100214A Withdrawn EP0784120A3 (fr) 1993-01-29 1993-08-07 Procédé et dispositif pour l'enduction d'une bande de papier
EP93112694A Expired - Lifetime EP0609483B1 (fr) 1993-01-29 1993-08-07 Procédé et dispositif pour l'enduction d'une bande de papier

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP93112694A Expired - Lifetime EP0609483B1 (fr) 1993-01-29 1993-08-07 Procédé et dispositif pour l'enduction d'une bande de papier

Country Status (7)

Country Link
EP (2) EP0784120A3 (fr)
JP (1) JPH07505573A (fr)
AT (1) ATE155839T1 (fr)
CA (1) CA2133311A1 (fr)
DE (1) DE59306972D1 (fr)
FI (1) FI99155B (fr)
WO (1) WO1994017244A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1231321A3 (fr) * 2001-02-09 2004-10-20 Industrie Cartarie Tronchetti S.p.A. Dispositif et procédé d'application d'un matériau fluide sur une bande de papier
DE102009008589B4 (de) * 2008-02-29 2013-03-21 Metso Paper, Inc. Verfahren und Anordnung zur Herstellung von mehrschichtig gestrichenem Papier

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI96338C (fi) * 1994-04-19 1996-06-10 Valmet Corp Menetelmä ja laitteisto painopaperirainan kaksipuoliseksi päällystämiseksi
DE4415581C2 (de) * 1994-05-04 1995-12-07 Voith Gmbh J M Papier-Streichvorrichtung
DE29610395U1 (de) * 1996-06-13 1996-08-22 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Vorrichtung zum aufeinanderfolgenden Auftragen von zwei Schichten von flüssigen oder pastösen Medien auf eine Seite einer laufenden Materialbahn
FI119564B (fi) † 2001-03-09 2008-12-31 Metso Paper Inc Menetelmä ja järjestely painopaperin valmistuksessa
FI20031362A7 (fi) * 2003-09-22 2005-03-24 Metso Paper Inc Menetelmä pintaliimatun paperi- tai kartonkirainan valmistamiseksi
JP5684965B2 (ja) * 2005-06-20 2015-03-18 大王製紙株式会社 塗工紙の製造方法
JP5300179B2 (ja) * 2006-05-02 2013-09-25 大王製紙株式会社 塗工紙の製造設備及び製造方法
CN104492660A (zh) * 2014-12-30 2015-04-08 松德机械股份有限公司 一种双面涂布一体机及其涂布的方法
CN105133428A (zh) * 2015-09-06 2015-12-09 安徽金亿禾特种纸有限公司 一种纸张生产用上料装置

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
US2334102A (en) * 1940-08-26 1943-11-09 Dow Chemical Co Coating equipment
US3203392A (en) * 1961-06-27 1965-08-31 Du Pont Freely supported rod for smoothing coating composition applied to webs
DE1804824A1 (de) * 1968-10-24 1970-05-27 Ind Technik Plastikmaschinen G Streich-,Impraegnier- und Auftragsmaschine,insbesondere fuer die Kunstlederherstellung
US3952119A (en) * 1972-07-12 1976-04-20 Th. Goldschmidt Ag Process for coloring absorptive, rough surface paper
DE8414413U1 (de) * 1984-05-11 1987-11-19 J.M. Voith Gmbh, 7920 Heidenheim Vorrichtung zum Auftragen einer Flüssigkeit auf eine laufende Bahn
DE3610943C1 (de) * 1986-04-02 1987-07-30 Vits Maschinenbau Gmbh Verfahren und Vorrichtung zum beidseitigen Auftragen von fluessigen,pastoesen oder schaumigen Massen auf Materialbahnen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1231321A3 (fr) * 2001-02-09 2004-10-20 Industrie Cartarie Tronchetti S.p.A. Dispositif et procédé d'application d'un matériau fluide sur une bande de papier
DE102009008589B4 (de) * 2008-02-29 2013-03-21 Metso Paper, Inc. Verfahren und Anordnung zur Herstellung von mehrschichtig gestrichenem Papier

Also Published As

Publication number Publication date
EP0609483B1 (fr) 1997-07-23
WO1994017244A1 (fr) 1994-08-04
DE59306972D1 (de) 1997-08-28
FI944496L (fi) 1994-09-28
JPH07505573A (ja) 1995-06-22
EP0784120A3 (fr) 2004-04-14
FI944496A0 (fi) 1994-09-28
ATE155839T1 (de) 1997-08-15
CA2133311A1 (fr) 1994-07-30
FI99155B (fi) 1997-06-30
EP0609483A1 (fr) 1994-08-10

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