EP1398084A1 - Procédé et dispositif d'enduction au rideau d'un substrat en mouvement - Google Patents

Procédé et dispositif d'enduction au rideau d'un substrat en mouvement Download PDF

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Publication number
EP1398084A1
EP1398084A1 EP02405783A EP02405783A EP1398084A1 EP 1398084 A1 EP1398084 A1 EP 1398084A1 EP 02405783 A EP02405783 A EP 02405783A EP 02405783 A EP02405783 A EP 02405783A EP 1398084 A1 EP1398084 A1 EP 1398084A1
Authority
EP
European Patent Office
Prior art keywords
curtain
coating
liquid
side guides
groove
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
EP02405783A
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German (de)
English (en)
Other versions
EP1398084B1 (fr
Inventor
Gilbert Gugler
Maurice Pasquier
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.)
Ilford Imaging Switzerland GmbH
Original Assignee
Ilford Imaging Switzerland 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 Ilford Imaging Switzerland GmbH filed Critical Ilford Imaging Switzerland GmbH
Priority to DE50209547T priority Critical patent/DE50209547D1/de
Priority to EP02405783A priority patent/EP1398084B1/fr
Priority to AT02405783T priority patent/ATE354443T1/de
Priority to JP2003310889A priority patent/JP4632643B2/ja
Priority to US10/660,399 priority patent/US7160579B2/en
Publication of EP1398084A1 publication Critical patent/EP1398084A1/fr
Application granted granted Critical
Publication of EP1398084B1 publication Critical patent/EP1398084B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B05C5/007—Slide-hopper coaters, i.e. apparatus in which the liquid or other fluent material flows freely on an inclined surface before contacting the work
    • B05C5/008—Slide-hopper curtain coaters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S118/00—Coating apparatus
    • Y10S118/04—Curtain coater

Definitions

  • the present invention relates to a method and an apparatus for Coating a moving carrier, in which the coating material in a free falling curtain is applied to a moving support.
  • the aim of the invention is to provide a method and an apparatus for the curtain casting, in which the curtain falls undisturbed and an even one Coating with good edge quality is done and it is not necessary to cover the edge of the curtain to be removed by means of a separation system.
  • This goal is achieved by using the groove as a guide surface in the side guide an optimal width, an optimized surface structure and a suitable one Shape of the lower ends of the side guides is chosen.
  • Another object of the invention is to provide a method and an Device with which a uniform coating with good edge quality without material loss in many different casting conditions (speed of the moving carrier, application quantity, viscosity and dynamic Surface tension of the coating liquids) can be achieved.
  • the coating device also has one to be coated carrier (8), the casting roller (9) around this in the direction of rotation around and under the coating device.
  • the side-limiting liquid film (10) fed across the curtain is designed such that the direction of flow of the Liquid film (11) exiting the feed slot is the same as that of the falling curtain (6) is to disturb the speed profile to keep it as small as possible.
  • the liquid that forms the side-delimiting liquid film exists predominantly from water, but possibly also wetting agents, inorganic or organic salts, polymers, pigments or components of the coating liquid may contain. It is also possible to use non-aqueous liquids to be used for the side-limiting liquid film.
  • the width L of the groove (13) in FIG. 3, the actual guide surface of the curtain is between 4 mm and 11 mm, preferably between 6 mm and 9 mm. Within this range of the width of the groove (13) is achieved with the smallest and small amounts of side liquid optimal stability of the curtain, measured using the smallest dosing amounts of the coating solutions, at which the curtain just doesn't detach from the side guides.
  • the physical condition of the surface is of particular importance the groove (13). Rough surfaces are preferred, especially in the direction of the curtain grooved surfaces, the profile of the grooves sinusoidal, triangular or rectangular or a mixture of these profiles, although rough Surfaces are much more difficult to clean than smooth surfaces.
  • the Grooves are applied continuously or interrupted in the initial fall direction.
  • the distance between the individual grooves is preferably between 10 ⁇ m and 1000 ⁇ m between 100 ⁇ m and 250 ⁇ m.
  • the depth of the grooves is between 1 ⁇ m and 500 ⁇ m, preferably between 30 ⁇ m and 100 ⁇ m.
  • a stable coating process can be achieved with the device according to the invention achieve with amounts of side liquid that are less than 3 I / h.
  • the same coating liquids were used in the inventive Method and the device according to the invention the optimized surface and width of the groove, much smaller values of the minimum Dosing amount of coating liquids reached than when using the above known device without optimized surface and width of the groove.
  • the stability of the curtain edges on the side guides is thus optimized Surface structure and width of the groove have been significantly improved, what allows to remove the curtain edges by means of a separation system dispense.
  • the entire coating liquid together with the side liquid on the applied moving carrier is a flow separation of the curtain
  • the angle ⁇ must be in the range between 0 ° and 90 ° are preferred, values between 10 ° and 60 ° are preferred.
  • the lower end of the side guides In order to prevent this air intake in the curtain edge zones, especially with small application quantities and low viscosities of the coating solutions, the lower end of the side guides must have a suitable shape.
  • the lower end of the side guides which is directed towards the curtain, is designed as a downwardly projecting cutting edge, the lower edge of which is sharp or slightly rounded. Both the height and width of this cutting edge are in the range of a few millimeters.
  • the angle ⁇ is in the range between 0 ° and 90 °, values between 30 ° and 90 ° are preferred.
  • the falling curtain leaves the side guides and falls unguided to the moving support underneath. On this unguided route, the curtain tends to contract due to the surface tension of the coating solutions.
  • the distance between the lower ends of the side guides and the moving one to be coated Carrier d in a range between 0.05 mm and 3 mm, preferably between 0.4 mm and 1.5 mm.
  • edge fluid mixture of cornering fluid and coating fluids
  • the coating solutions can edge fluid (mixture of cornering fluid and coating fluids) are pulled under the side guide elements and thereby heavy pollution in the area of the curtain impact region.
  • the distance d to the order quantities and viscosities of the coating solutions are adjusted and on the other hand the surface of the undersides (14) of the side guides is hydrophobic his.
  • the free surface energy of these undersides must be between 10 mNm and 60 mNm, preferably between 20 mNm and 45 mNm.
  • Suitable coatings the bottom is amorphous carbon or teflon.
  • a special one preferred coating is teflon.
  • the device according to the invention can be varied with respect to the stated mass and adapted to the various working conditions that occur in practice. While each of the measures described above already brings about extensive improvements in terms of the quality of the coating, the combination of the measures described above for the side guides (suitable angles ⁇ and ⁇ , optimal surface structure and width of the groove and optimal coating of the underside (14)) result Method and device in which all separation systems and
  • Suction devices can do without and still a perfect casting quality receives on the moving carrier.
  • the device according to the invention is in the following examples with a Prior art device compared, these examples being no limitation of the invention mean.
  • a first coating liquid was prepared with the ingredients listed in Table 1. The amounts, with the exception of that of water, are those of the applied and then dried layers.
  • Component (concentration) Quantity (g / m 2 ) Lanthanum-doped AIOOH (solid substance) 48,000 Lactic acid (90%) 0780 Polyvinyl alcohol A (10.0%) 1440 Polyvinyl alcohol B (7.5%) 2880 Plasticizer 1 (40%) 1440 Plasticizer 2 (50%) 0200 Wetting agent A (3%) 0208 water 153752 Total 208700
  • the lanthanum-doped AIOOH was prepared according to that in Example 1 of the patent application Process described EP 0'967'086.
  • Polyvinyl alcohol A is mowiol 26-88
  • polyvinyl alcohol B is Mowiol 56-98, both available from Omya AG, Oftringen, Switzerland
  • plasticizer 1 is 1,1,1-tris (hydroxymethyl) propane, available at Fluka Chemie GmbH, Buchs, Switzerland
  • plasticizer 2 is glycerin and the wetting agent A is Triton X-100, available from Christ Chemie AG, Reinach, Switzerland.
  • a second coating liquid was prepared with the ingredients listed in Table 2. The amounts, with the exception of that of water, are those of the applied and then dried layers. Component (concentration) Quantity (g / m 2 ) gelatin 11,700 Bactericide (5.88%) 0006 Wetting agent B (10.3%) 0051 Wetting agent C (5.26%) 0071 water 60172 Total 72,000
  • the gelatin is an alkaline bone gelatin, available from Deutsche Gelatine factories, Eberbach, Germany; the bactericide is chlorometacresol, available from Chemia Brugg AG, Brugg, Switzerland; the wetting agent B is Niaproof 04, available from Fluka Chemie GmbH, Buchs, Switzerland and wetting agent C is Olin 10G, available from Arch Chemicals, Norwalk, USA.
  • a curtain washer which contained the described side guides according to the invention Curtain formed.
  • the stability of the curtain was based on the minimum dosing amounts of the coating liquids measured, in which the formed Curtain still a stable position between the side guides according to the invention occupied.
  • the side guide fluid was deionized with a little sodium chloride mixed water used. The addition of sodium chloride is necessary to adjust the amount of cornering fluid using Magnetoflow.
  • Table 3 shows the results obtained with the device according to the invention.
  • the width of the groove (13) was 7 mm, the angle ⁇ 45 °, the angle ⁇ 90 °, the surface of the groove was provided with continuous sawtooth-shaped grooves with a height of 50 ⁇ m at intervals of 150 ⁇ m.
  • Amount of side liquid supplied (I / h) Minimum dosing quantity of the coating liquid 1 (I / h) Minimum dosage quantity of the coating liquid 2 (I / h) 1 63.18 43.74 1.5 38.88 25.26 2 43.74 20:40 3 68.04 34.02
  • Table 4 shows the results obtained with the device described in patent application EP 0'841'588.
  • the width of the groove (13) in this case was 17 mm, the angle ⁇ 45 °, the angle ⁇ 90 °, the surface of the groove was smooth.
  • Amount of side liquid supplied (I / h) Minimum dosing quantity of the coating liquid 1 (I / h) Minimum dosage quantity of the coating liquid 2 (I / h) 6 72.90 43.74 8th 53.46 37.92 16 63.18 58.32
  • composition described in Table 1 became the coating liquid used.
  • the coating solution prepared was applied using a curtain applied a commercially available polyethylene-coated paper backing.
  • As Lateral guide fluid was deionized with some sodium chloride added Water used.
  • the distance d between the lower end of the side guides and the moving carrier was in the range between 0.4 mm and 3.0 mm varied.
  • the bottom of the side guides had a Teflon surface.
  • Table 5 shows the quality of the pouring edges and the tendency for coating liquid to be drawn in under the side guide at different distances between the lower end of the side guides and the moving support to be poured.
  • Distance between the bottom end of the side guides and the beam (mm) Edge assessment and assessment of the intake of liquid under the side guides 00:40 Note 3; Liquid is drawn in under the side guides 00:50 Note 3; Occasional liquid is drawn in under the side guides and the resulting contamination 0.75 Note 1; no liquid penetration under the side guides 1:00 Note 1; no liquid penetration under the side guides 1:50 Grade 2; no liquid penetration under the side guides 2:00 Note 3; no liquid penetration under the side guides 3:00 Grade 4; no liquid penetration under the side guides
  • the optimum is Distance between the lower end of the side guides and the one to be watered moving beams 0.4 mm to 1.5 mm.
  • composition described in Table 2 was used as the coating liquid used.
  • the coating solution prepared was applied using a curtain applied a commercially available polyethylene-coated paper backing.
  • As Lateral guide fluid was deionized with some sodium chloride added Water used.
  • the distance d between the lower end of the side guides and the moving carrier was 1.0 mm.
  • the bottom of the side guides was coated with different materials.
  • Table 6 summarizes the quality of the pouring edges and the tendency for coating liquid to penetrate under the side guide for differently coated surfaces of the undersides of the side guides.
  • Teflon is a special one suitable coating of the underside (14) of the side guides according to the invention.

Landscapes

  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP02405783A 2002-09-10 2002-09-10 Procédé et dispositif d'enduction au rideau d'un substrat en mouvement Expired - Lifetime EP1398084B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE50209547T DE50209547D1 (de) 2002-09-10 2002-09-10 Verfahren und Vorrichtung zur Vorhangbeschichtung eines bewegten Trägers
EP02405783A EP1398084B1 (fr) 2002-09-10 2002-09-10 Procédé et dispositif d'enduction au rideau d'un substrat en mouvement
AT02405783T ATE354443T1 (de) 2002-09-10 2002-09-10 Verfahren und vorrichtung zur vorhangbeschichtung eines bewegten trägers
JP2003310889A JP4632643B2 (ja) 2002-09-10 2003-09-03 移動するシート状物のカーテンコーティング方法及び装置
US10/660,399 US7160579B2 (en) 2002-09-10 2003-09-10 Method and device for coating a moving web

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02405783A EP1398084B1 (fr) 2002-09-10 2002-09-10 Procédé et dispositif d'enduction au rideau d'un substrat en mouvement

Publications (2)

Publication Number Publication Date
EP1398084A1 true EP1398084A1 (fr) 2004-03-17
EP1398084B1 EP1398084B1 (fr) 2007-02-21

Family

ID=31725533

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02405783A Expired - Lifetime EP1398084B1 (fr) 2002-09-10 2002-09-10 Procédé et dispositif d'enduction au rideau d'un substrat en mouvement

Country Status (5)

Country Link
US (1) US7160579B2 (fr)
EP (1) EP1398084B1 (fr)
JP (1) JP4632643B2 (fr)
AT (1) ATE354443T1 (fr)
DE (1) DE50209547D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008076743A1 (fr) * 2006-12-19 2008-06-26 Dow Global Technologies Inc. Procédé de revêtement de rideau utilisant un fluide de guidage de bord
DE102016007574A1 (de) * 2016-06-21 2017-12-21 Fresenius Medical Care Deutschland Gmbh Zweikomponentige Abtropfkante

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8881674B2 (en) * 2009-09-08 2014-11-11 Ricoh Company, Ltd. Curtain coating apparatus and curtain coating method
US9333524B2 (en) 2013-03-15 2016-05-10 Ricoh Company, Ltd. Slot curtain coating apparatus and slot curtain coating method
JP6160333B2 (ja) * 2013-07-29 2017-07-12 株式会社リコー カーテン塗布装置及びカーテン塗布方法
EP2952264B1 (fr) 2014-06-05 2019-10-30 Valmet Technologies, Inc. Dispositif de revêtement à rideau

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0281520A2 (fr) 1987-03-03 1988-09-07 Ciba-Geigy Ag Elément de séparation pour délimiter la largeur d'un rideau de coulée
EP0327020A2 (fr) * 1988-02-01 1989-08-09 Fuji Photo Film Co., Ltd. Appareil de revêtement
EP0606038A1 (fr) 1993-01-07 1994-07-13 Eastman Kodak Company Dispositif d'enduction au rideau avec évacuation du bord
EP0740197A1 (fr) 1995-04-26 1996-10-30 Ilford Ag Procédé et appareil pour le revêtement par rideau d'un support en mouvement
EP0907103A1 (fr) 1997-10-03 1999-04-07 Troller Schweizer Engineering AG Procédé et dispositif pour le revêtement par rideau d'un support en mouvement
EP1023949A1 (fr) 1999-01-28 2000-08-02 Agfa-Gevaert N.V. Procédé et appareil d'enduction au rideau

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5837866B2 (ja) 1978-11-28 1983-08-19 富士写真フイルム株式会社 塗布方法及び装置
US4559896A (en) * 1983-09-15 1985-12-24 Ciba Geigy Corporation Coating apparatus
US4830887A (en) * 1988-04-22 1989-05-16 Eastman Kodak Company Curtain coating method and apparatus
JPH10235260A (ja) * 1996-12-26 1998-09-08 Konica Corp 塗布装置及び写真感光材料
JP2000354813A (ja) * 1999-06-15 2000-12-26 Fuji Photo Film Co Ltd カーテン塗布装置
JP2001046939A (ja) * 1999-08-11 2001-02-20 Mitsubishi Paper Mills Ltd 塗布装置および塗布方法
JP2001252612A (ja) * 2000-03-09 2001-09-18 Mitsubishi Paper Mills Ltd 塗布方法
JP4326711B2 (ja) * 2001-02-28 2009-09-09 富士フイルム株式会社 カーテン塗布方法
DE10117668A1 (de) * 2001-04-09 2002-10-10 Bachofen & Meier Ag Buelach Vorrichtung zum Beschichten einer laufenden Materialbahn
ATE295759T1 (de) * 2001-12-13 2005-06-15 Dow Global Technologies Inc Vorhangsbeschichtungs- verfahren und vorrichtung
JP5070507B2 (ja) * 2005-12-27 2012-11-14 株式会社大一商会 遊技機

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0281520A2 (fr) 1987-03-03 1988-09-07 Ciba-Geigy Ag Elément de séparation pour délimiter la largeur d'un rideau de coulée
EP0327020A2 (fr) * 1988-02-01 1989-08-09 Fuji Photo Film Co., Ltd. Appareil de revêtement
EP0606038A1 (fr) 1993-01-07 1994-07-13 Eastman Kodak Company Dispositif d'enduction au rideau avec évacuation du bord
EP0740197A1 (fr) 1995-04-26 1996-10-30 Ilford Ag Procédé et appareil pour le revêtement par rideau d'un support en mouvement
EP0841588A2 (fr) 1995-04-26 1998-05-13 Ilford Ag Procédé et appareil pour le revêtement par rideau d'un support en mouvement
EP0907103A1 (fr) 1997-10-03 1999-04-07 Troller Schweizer Engineering AG Procédé et dispositif pour le revêtement par rideau d'un support en mouvement
EP1023949A1 (fr) 1999-01-28 2000-08-02 Agfa-Gevaert N.V. Procédé et appareil d'enduction au rideau

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008076743A1 (fr) * 2006-12-19 2008-06-26 Dow Global Technologies Inc. Procédé de revêtement de rideau utilisant un fluide de guidage de bord
DE102016007574A1 (de) * 2016-06-21 2017-12-21 Fresenius Medical Care Deutschland Gmbh Zweikomponentige Abtropfkante

Also Published As

Publication number Publication date
DE50209547D1 (de) 2007-04-05
JP4632643B2 (ja) 2011-02-16
US20040047999A1 (en) 2004-03-11
ATE354443T1 (de) 2007-03-15
JP2004105960A (ja) 2004-04-08
EP1398084B1 (fr) 2007-02-21
US7160579B2 (en) 2007-01-09

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