EP1289675B1 - Procede et dispositif de couchage par voile - Google Patents

Procede et dispositif de couchage par voile Download PDF

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Publication number
EP1289675B1
EP1289675B1 EP01945149A EP01945149A EP1289675B1 EP 1289675 B1 EP1289675 B1 EP 1289675B1 EP 01945149 A EP01945149 A EP 01945149A EP 01945149 A EP01945149 A EP 01945149A EP 1289675 B1 EP1289675 B1 EP 1289675B1
Authority
EP
European Patent Office
Prior art keywords
base material
brushes
web
rows
bristles
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.)
Expired - Lifetime
Application number
EP01945149A
Other languages
German (de)
English (en)
Other versions
EP1289675A1 (fr
Inventor
Haruo Arase
Erich Kranz
Volker Hiller
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.)
Mitsubishi HiTech Paper Flensburg GmbH
Original Assignee
Mitsubishi HiTech Paper Flensburg 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
Application filed by Mitsubishi HiTech Paper Flensburg GmbH filed Critical Mitsubishi HiTech Paper Flensburg GmbH
Publication of EP1289675A1 publication Critical patent/EP1289675A1/fr
Application granted granted Critical
Publication of EP1289675B1 publication Critical patent/EP1289675B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/005—Curtain coaters

Definitions

  • the present invention relates to a method and a device used therefor for curtain coating, in which a free-falling liquid curtain of at least a layer is applied to a continuously moving web-shaped carrier material.
  • curtain coating processes are becoming increasingly important due to their numerous advantages, in addition to being able to simultaneously multiple layers of different Apply coating liquids, also extraordinar surface properties count the applied coatings.
  • the curtain coating processes become for the production of photographic papers and magnetic recording papers but also increasingly of other possible applications the curtain coating method, for example for the production of heat and pressure sensitive recording materials, ink jet receiving media and pigment coated recording materials.
  • the so-called Schlitzg teller in which the Coating liquid through a downward, across the to be coated web-shaped carrier material arranged outlet gap emerges and there directly forms the free falling liquid curtain, and the so-called Gleit vomg screener.
  • the coating liquid is first inclined downwards Abandoned sliding surface, where the liquid in a thin film under the influence of Gravity flows down the sliding surface and at the end of the free-falling liquid curtain formed.
  • the web to be coated by curtain coating techniques is directed slightly downwards between two guide rolls located in front of and behind the wetting line by a knife located some distance in front of the wetting line.
  • the knife forms an airtight shield for the air entrained by the material web to the liquid curtain and is thus intended to permanently prevent the disturbing influences of the oriented in the direction of the liquid curtain air movements.
  • Another embodiment provides a hollow, open at the bottom knife, with the additional air can be sucked.
  • the dust particles generated by the friction-intensive contact of the web surface with the knife which collect on the knife front side, be carried along by the web to the wetting line and thus cause coating defects.
  • another coating is to be applied, for example, to form a protective layer, this proposal is not useful because due to the friction between the web surface and knife streaking is observed in the recording layer.
  • EP-A-0 440 279 discloses an apparatus for carrying out the curtain coating method in which an impairment of the formed liquid curtain is to be avoided by using a combination of air shield without air supply and exhaust devices with a downstream brush.
  • the brush is much more effective in terms of a reduction of the wetting line oriented toward air flow than the air shield.
  • Further embodiments provide for the arrangement of a plurality of rows of brushes, if appropriate in combination with, in particular, brushes mounted in front, running across the material web plastic strips as Heilstrombrecher before. As the examples listed show, with the known device a uniform coating thickness can be achieved, but with an obviously necessary strong restriction to much too low production speeds of 200-230 m / min. The discussed document gives no indication of air handling systems to be used in the device.
  • the object is achieved by a curtain coating process, in a free-falling liquid curtain from at least one layer to a continuous moved web-shaped carrier material is applied, wherein, in the direction of movement the web-shaped carrier material, the entrained by the carrier material Air in front of the wetting line by at least two rows of brushes Construction with resting on the substrate bristle hair from the web-shaped Striped carrier material and sucked through an air suction, and wherein the air suction device is integrated between the at least two rows of brushes is.
  • the process causes the air entrained by the carrier material to be in front of the wetting line is discharged, which is why a continuous air removal is preferred. It also proves to be an advantage if the brush construction at least over the full width of the web-shaped carrier material expands, so as an air discharge over the full width of the substrate is made possible.
  • the inventive method is particularly well suited if the carrier material a heat-sensitive or a pressure-sensitive recording layer.
  • the method according to the invention makes it possible to carry out a further coating for example, to form a protective layer on the heat or pressure sensitive Recording materials even at higher production speeds with over 500 m / min and preferably with over 800 m / min, without the liquid curtain is significantly distorted by the entrained by the carrier material air.
  • the invention of the underlying novel device is characterized in that in Direction of movement of the web-shaped carrier material seen before the wetting line a construction comprising at least two brush rows is arranged, the rows of brushes Bristle hair own, which rest on the web-shaped carrier material are provided, and wherein the construction comprises an air suction device, the between the rows of brushes are integrated.
  • the device according to the invention is very helpful for cleaning the carrier material before it is coated.
  • first row of brushes whirls the loose dust, which has, for example, on the substrate top, existing unbonded pigments and Faserfeinmaterial on.
  • the air suction device detects this dust and discharges it, which is why a dust filter integrated in the suction device is advantageous.
  • second row of brushes prevents the dust raised by the first row of brushes can penetrate to the wetting line and also allows a second surface cleaning of the substrate.
  • the bristle hairs may preferably be arranged in bundles which are located on the bristle holder lower edge have a circular cross section whose diameter is in Extended direction of the surface of the substrate to be coated, so that the Bundles have a frustoconical design, without the invention to a Such training of the brush or brush row would be limited.
  • bristle materials are possible.
  • the rows of bristles comprise brush hair made of synthetic material such as polyester or polypropylene, wherein bristles hair made of polyamide are particularly preferred.
  • the bristle hair of the rows of brushes have a maximum thickness of 0.2 mm and preferably 0.1 mm.
  • the distance of the dirt trap lip to the web-shaped carrier material in a range between 0.5 and 2 mm is such a small distance but only possible if the web in the area of the dirt trap lip particularly little tends to flutter, which in particular in a circular guided or at a means Guiding rollers support carrier material web is given.
  • the structurally comparable the dirt trap lip is constructed and, in the direction of movement of the carrier material seen before the first row of brushes is arranged.
  • Materials to build the air flow tab metal or plastic call could Range between 0.5 and 2 mm are recognized as particularly effective.
  • the bristle shakers sit on guide rails and together with them Make brush heads.
  • the guide rails of the brush heads are in register in associated Bürstenkoptlialterungen. To replace soiled or damaged Brush heads become these laterally from the receiving brush head holders pulled out, followed by the insertion of the new brush heads by lateral Push.
  • a further embodiment provides that at least two brush designs To sit in a star shape around the central axis of a type Revo (vermagazin Replacing soiled or damaged rows of brushes will be the appropriate first brush construction from a working position around the turret central axis twisted into the at least one maintenance position, while the at least second Brush construction is rotated in the working position.
  • the brushes lie as in the previous paragraphs described on the web-shaped carrier material and cause according to the task Dissipation of entrained by the carrier air in front of the wetting line.
  • the corresponding the front standing paragraph also preferred in this embodiment Brush heads consisting of guide rails with bristle holders seated thereon, If necessary, they can be exchanged in the maintenance position of the brush constructions become.
  • the rows of brushes are preferably to be aligned so that they an imaginary line that is perpendicular to the substrate standing to the center of the lower edge of the bristle holder, enclose an angle ⁇ of -30 ° to + 10 °.
  • the bristle hairs point in the direction of the wetting line, while a positive Setting an orientation opposite to the direction of movement of the substrate means.
  • the device according to the invention is optionally in the form of a curved, to the radius a sheet-shaped carrier material leading counter roller adapted air shield or in the form of a rectilinear, guided on the rectilinear, optionally with Rolls or comparable construction materials supported web-shaped carrier material Seated construction executed without being limited thereto.
  • the device according to the invention is also compatible with other systems for the curtain coating process for stabilizing the free-falling liquid curtain application find, combinable.
  • the invention is based on a figure, the inventive method using describes the device according to the invention, illustrates:
  • the two rows of brushes (6a, 6b) are each made of brush heads and brush head attachments (17a, 17b) carrying the brush heads.
  • the brush heads are composed of the bristle hairs (11) having Bristle holders (10a, 10b) and guide rails (16a, 16b), where the Borstenhalter (10 a, 10 b) are attached.
  • the guide rails (16a, 16b) of the brush heads sit snugly in the brush head holders (17a, 17b) and can by intended Exchange of the brush heads laterally from the brush head holders (17a, 17b) are pulled out.
  • the respective thickness (9a, 9b) of the brush rows (6a, 6b), measured at the lower edge of the Brstenhatter (10a, 10b) is 5 mm.
  • the free length (12) the bristle hairs (11) between bristle holder lower edge and surface of the web-shaped Carrier material (2) is 30 mm.
  • the bristle hair made of polyamide (11) have a thickness of 0.1 mm.
  • the distance (13) between the bristle hairs (11) of the brush rows (6a, 6b) is 30 mm, measured at the level of the surface of the carrier material (2).
  • the two rows of brushes (6a, 6b) are rectangular aligned to the web-shaped carrier material (2).
  • the brush rows (6a, 6b) show a trapezoidal formation in the side view.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Claims (27)

  1. Procédé d'enduction en rideau, dans lequel un rideau de liquide tombant librement est formé d'au moins une couche est déposé sur un matériau de support en forme de bande qui se déplace continûment, caractérisé en ce que vu dans la direction de déplacement (7) du matériau de support en forme de bande (2), l'air entraíné conjointement par le matériau de support (2) est évacué du matériau de support en forme de bande (2), en avant de la ligne de mouillage (4) par une structure comportant au moins deux rangées de brosses (6a, 6b) et comportant des poils (11) appliqués sur le matériau de support (1) et est aspiré par un dispositif d'aspiration d'air (5), le dispositif d'aspiration d'air (5) étant intégré entre les au moins deux rangées de brosses (6a, 6b).
  2. Procédé d'enduction en rideau selon la revendication 1, caractérisé en ce que l'air entraíné conjointement par le matériau de support (2) est évacué continûment.
  3. Procédé d'enduction en rideau selon l'une des revendications 1 ou 2, caractérisé en ce que l'air entraíné conjointement est évacué sur toute la largeur du matériau de support (2) en forme de bande.
  4. Procédé d'enduction en rideau selon l'une des revendications 1 à 3, caractérisé en ce que le matériau de support en forme de bande (2) contient une couche d'enregistrement sensible à la chaleur.
  5. Procédé d'enduction en rideau selon l'une des revendications 1 à 3, caractérisé en ce que le matériau de support en forme de bande (2) contient une couche d'enregistrement sensible à la pression.
  6. Procédé d'enduction en rideau selon l'une des revendications 1 à 5, caractérisé en ce que le matériau de support en forme de bande (2) est déplacé à une vitesse dépassant 500 m/mn.
  7. Procédé d'enduction en rideau selon l'une des revendications 1 à 6, caractérisé en ce que le matériau de support en forme de bande (2) est déplacé avec une vitesse supérieure à 800 m/mn.
  8. Dispositif pour le procédé d'enduction en rideau, selon lequel un rideau de liquide tombant librement est formé d'au moins une couche et déposé sur un matériau de support en forme de bande qui se déplace continûment, caractérisé en ce que vu dans la direction de déplacement (7) du matériau de support en forme de bande (2), en avant de la ligne de mouillage (4) est disposée une structure comportant au moins deux rangées de brosses (6a, 6b) et dont les rangées de brosses (6a, 6b) possèdent des poils (11) qui sont destinés à s'appliquer sur le matériau de support (2) en forme de bande, et dans lequel la structure comprend un dispositif d'aspiration d'air (5) qui est intégré entre les rangées de brosses (6a, 6b).
  9. Dispositif selon la revendication 8, caractérisé en ce que la structure de brosses s'étend au moins sur toute la largeur du matériau en forme de bande (2).
  10. Dispositif selon l'une des revendications 8 ou 9, caractérisé en ce que la puissance d'aspiration du dispositif d'aspiration d'air (5) est commandable.
  11. Dispositif selon l'une des revendications 8 à 10, caractérisé en ce que, vu dans la direction de déplacement (7) du matériau de support (2), les poils (11) de la dernière rangée de brosses (6b) sont disposés avec un éloignement (8) égal au maximum à 80 mm par rapport à la ligne de mouillage (4).
  12. Dispositif selon l'une des revendications 8 à 11, caractérisé en ce que, vu dans la direction de déplacement (7) du matériau de support (2), les poils (11) de la dernière rangée de brosses (6b) sont disposés à une distance (8) de la ligne de mouillage (4) égale au maximum à 30 mm.
  13. Dispositif selon l'une des revendications 8 à 12, caractérisé en ce que les rangées de brosses (6a, 6b) possèdent une épaisseur respective (9a, 9b) mesurée au niveau du bord inférieur des dispositifs (10a, 10b) de retenue des poils, dans une zone comprise entre 1 et 15 mm.
  14. Dispositif selon l'une des revendications 8 à 13, caractérisé en ce que les rangées de brosses (6a, 6b) possèdent une épaisseur respective (9a, 9b) mesurée au niveau du bord inférieur des dispositifs (10a, 10b) de retenue des poils, dans une zone comprise entre 3 et 8 mm.
  15. Dispositif selon l'une des revendications 8 à 14, caractérisé en ce que les poils (11) des rangées de brosses (6a, 6b) possèdent une longueur libre (12) entre les dispositifs (10a, 10b) de retenue des brosses et le matériau de support en forme de bande (2), qui est égale au maximum à 80 mm et n'est pas inférieure à 10 mm.
  16. Dispositif selon l'une des revendications 8 à 15, caractérisé en ce que les poils (11) des rangées de brosses (6a, 6b) possèdent une longueur libre (12) entre les dispositifs (10a, 10b) de retenue des brosses et le matériau de support en forme de bande, qui est égal au maximum à 30 mm et n'est pas inférieur à 10 mm.
  17. Dispositif selon l'une des revendications 8 à 16, caractérisé en ce que les rangées de brosses (6a, 6b) comprennent des poils de brosse (11) qui sont réalisés en un matériau synthétique.
  18. Dispositif selon l'une des revendications 8 à 17, caractérisé en ce que les rangées de brosses (6a, 6b) comprennent des poils de brosse (11), qui sont réalisés en polyamide.
  19. Dispositif selon l'une des revendications 8 à 18, caractérisé en ce que les poils (11) des rangées de brosses (6a, 6b) possèdent une épaisseur maximale de 0,2 mm.
  20. Dispositif selon l'une des revendications 8 à 19, caractérisé en ce que les poils (11) des rangées de brosses (6a, 6b) possèdent une épaisseur maximale de 0,1 mm.
  21. Dispositif selon l'une des revendications 8 à 20, caractérisé en ce que les poils (11) des rangées de brosses (6a, 6b) sont séparés les uns des autres par une distance (13) égale au maximum à 100 mm, mesurée à hauteur de la surface du matériau de support (2).
  22. Dispositif selon l'une des revendications 8 à 21, caractérisé en ce que les poils (11) des brosses des rangées de brosses (6a, 6b) sont séparés les uns des autres par une distance (13) égale au maximum à 30 mm, mesurée à hauteur de la surface du matériau de support (2).
  23. Dispositif selon l'une des revendications 8 à 22, caractérisé en ce que, vu dans la direction de déplacement (7) du matériau de support (2), en arrière de la dernière rangée de brosses (6b) est disposée une lèvre (14) de captage de la saleté, qui s'étend au moins sur toute la largeur du matériau de support en forme de bande (2).
  24. Dispositif selon la revendication 23, caractérisé en ce que la lèvre (14) de captage de la saleté est réalisée en un métal ou en une matière plastique.
  25. Dispositif selon l'une des revendications 23 ou 24, caractérisé en ce que la distance (15) entre la lèvre (14) de captage de la saleté et le matériau de support en forme de bande (2) se situe dans une gamme entre 0,5 et 2 mm.
  26. Dispositif selon l'une des revendications 8 à 25, caractérisé en ce que les têtes des brosses, constituées par des dispositifs (10a, 10b) de retenue des poils et des rails de guidage (16a, 16b) sont individuellement interchangeables.
  27. Dispositif selon l'une des revendications 8 à 26, caractérisé en ce que les rangées de brosses (6a, 6b) sont orientées par rapport du matériau de support en forme bande (2), en faisant un angle α compris entre -30° et +10°, mesuré par rapport à la verticale.
EP01945149A 2000-06-02 2001-05-17 Procede et dispositif de couchage par voile Expired - Lifetime EP1289675B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10027034 2000-06-02
DE10027034A DE10027034A1 (de) 2000-06-02 2000-06-02 Verfahren und Vorrichtung zur Vorhangbeschichtung
PCT/EP2001/005639 WO2001091917A1 (fr) 2000-06-02 2001-05-17 Procede et dispositif de couchage par voile

Publications (2)

Publication Number Publication Date
EP1289675A1 EP1289675A1 (fr) 2003-03-12
EP1289675B1 true EP1289675B1 (fr) 2005-03-02

Family

ID=7644258

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01945149A Expired - Lifetime EP1289675B1 (fr) 2000-06-02 2001-05-17 Procede et dispositif de couchage par voile

Country Status (4)

Country Link
EP (1) EP1289675B1 (fr)
AT (1) ATE289876T1 (fr)
DE (2) DE10027034A1 (fr)
WO (1) WO2001091917A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1269546C2 (de) * 1963-09-20 1974-11-14 Maschine zum aufbringen eines aus einem giesskopf austretenden fluessigkeitsfilmes
US3369522A (en) 1965-01-18 1968-02-20 Continental Oil Co Curtain coating apparatus
US3867901A (en) 1968-06-03 1975-02-25 Eastman Kodak Co Apparatus for production of photographic elements
JPS62186966A (ja) * 1986-02-12 1987-08-15 Fuji Photo Film Co Ltd 塗布方法及び装置
EP0440279A1 (fr) 1990-01-29 1991-08-07 Agfa-Gevaert N.V. Dispositif pour l'enduction sous forme de rideau d'éléments photographiques
DE69026097T2 (de) * 1990-12-12 1996-10-02 Agfa Gevaert Nv Vorhangbeschichter
DE59409768D1 (de) 1994-09-27 2001-07-05 Ilford Imaging Ch Gmbh Verfahren und Vorrichtung zur Vorhangbeschichtung eines bewegten Trägers
EP0906789B1 (fr) 1997-10-03 2001-09-19 TSE Troller Schweizer Engineering AG Procédé et appareil pour le revêtement par rideau d'un support en movement
DE19808159A1 (de) 1998-02-27 1999-09-02 Agfa Gevaert Ag Vorrichtung zum Vorhangbeschichten

Also Published As

Publication number Publication date
DE50105472D1 (de) 2005-04-07
ATE289876T1 (de) 2005-03-15
EP1289675A1 (fr) 2003-03-12
DE10027034A1 (de) 2001-12-13
WO2001091917A1 (fr) 2001-12-06

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