EP0484980B1 - Verfahren zur Beschichtung und Beschichtungsapparat dazu - Google Patents

Verfahren zur Beschichtung und Beschichtungsapparat dazu Download PDF

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Publication number
EP0484980B1
EP0484980B1 EP19910119094 EP91119094A EP0484980B1 EP 0484980 B1 EP0484980 B1 EP 0484980B1 EP 19910119094 EP19910119094 EP 19910119094 EP 91119094 A EP91119094 A EP 91119094A EP 0484980 B1 EP0484980 B1 EP 0484980B1
Authority
EP
European Patent Office
Prior art keywords
coating
manifold
solution
coating solution
plug
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
EP19910119094
Other languages
English (en)
French (fr)
Other versions
EP0484980A2 (de
EP0484980A3 (en
Inventor
Kuniyasu c/o Fuji Photo Film Co. Ltd. Chinda
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Publication of EP0484980A2 publication Critical patent/EP0484980A2/de
Publication of EP0484980A3 publication Critical patent/EP0484980A3/en
Application granted granted Critical
Publication of EP0484980B1 publication Critical patent/EP0484980B1/de
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
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0254—Coating heads with slot-shaped outlet
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
    • G03C2001/7459—Extrusion coating
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
    • G03C2001/7466—Geometry and shape of application devices

Definitions

  • the invention relates to a method and an apparatus as indicated in the precharacterizing parts of claims 1 and 2, respectively.
  • These method and apparatus serve for making a coating on a continuously running elongated flexible support, such as a photographic material, for example, a photographic paper or the like, a photograving material, photosensitive paper, thermosensitive paper, magnetic material, etc.
  • a photographic material for example, a photographic paper or the like
  • a photograving material for example, a photograving material, photosensitive paper, thermosensitive paper, magnetic material, etc.
  • a coating method and a coating apparatus conventionally known is a device in which a flowing path of a coating solution stream is curved over the entire length thereof as shown in Fig. 1 so as to make the coating solution distribution even from a coating solution supply inlet of a solution injector to a slot outlet of the solution injector in order to avoid thick coating at coating end portions and increase in coating amount at a center portion.
  • a solution injector constituted by a coating solution supply inlet, a manifold in the direction of width of the solution injector and communicated with the coating solution supply inlet, a slot communicated with the whole of the manifold in the direction of width of the solution injector and communicated with a coating solution discharge outlet
  • the working to produce such a solution injector is very difficult in view of design and work, and therefore, generally, the manifold is passed through and the opposite ends of the manifold are formed of plugs which are worked linearly.
  • the coating solution which contacts the end portion of the manifold partially stays so that the macromolecules in the coating solution are bridged to produce an insoluble material to cause a problem of generation of slag, streak, etc.
  • the object of the invention is to provide a coating method and a coating apparatus in which a solution injector is capable of maintaining good quality of coated products.
  • Fig. 1 is a front section of an example of a conventional solution injector having a curved flow path.
  • Fig. 2 is schematic front view of an embodiment of the coating apparatus according to the present invention.
  • Fig. 3(a) shows a cross section of an embodiment of the manifold according to the present invention.
  • Fig. 3(b) shows a front section of the end portion of the manifold.
  • Fig. 3(c) shows a plan section of the same.
  • Fig. 4(a) shows front sections of a conventional technique.
  • Fig. 4(b) shows the technique according to the present invention.
  • the coating method in which a coating solution is supplied from a coating solution supply inlet 4 of a solution injector 1, then distributed in the width direction of the solution injector 1 by means of a manifold 5, and then discharged from the solution injector 1 through a slot 2 having an even distance from the manifold 5 to thereby perform coating includes slide beads coating, extrusion coating, curtain coating, etc., and other coating methods using such a solution injector 1.
  • the feature of the present invention is in that the slot length is made even, while only end portion(s) of the manifold is (are) made to have a curved surface.
  • the manifold portion may be worked so that the solution injector is halved along the center line of the slot.
  • the manifold portion is formed as a through hole which passes left/right through the solution injector and plugs are provided at the end portions to which the coating solution contacts and the inner surfaces of the plugs are finished to be curved surfaces.
  • the coating solution supply inlet 4 of the solution injector 1 is provided either at a center portion of the solution injector 1, as shown in Fig. 2, or at one end portion of the manifold 5, not shown in the drawings.
  • the flow of the coating solution strikes against the both end portions of the manifold, while in the latter case, the flow strikes against the opposite end portion (counter-supply side) of the manifold 5.
  • an end portion of the manifold to which the coating solution contacts is constituted by a plug, and a front sectional shape of an inner surface of the plug has a curved surface tangentially connected to opposite ends of the slot is specifically realized as follows.
  • Fig. 3(a) the cross section of the plug portion 3 of the manifold 5 assuming that the cross section of the manifold 5 and the plug 3 are cylindrical and the slot portion 2 exists on top of the manifold portion 5, is shown.
  • the (Y - Y) vertical section of the plug portion 3 has a profile of a two-dimensional curved surface, as shown in Fig. 3(b).
  • the present invention is effective even if the end surface of the plug 3 is formed of such a two-dimensional curved surface.
  • any material can be used, for example, such as metal, rubber, synthetic resin, or the like, however, it is particularly preferable to use Teflon (TM), polyvinyl chloride, resin, rubber, or the like.
  • Teflon TM
  • polyvinyl chloride resin, rubber, or the like.
  • the "coating solution” may include those of various solution components corresponding to usages.
  • it includes: coating solutions for a photographic emulsion layer, an under coating layer, a protection layer, a back layer, etc. in a photographic material; coating solutions for a magnetic layer, an under coating layer, a lubrication layer, a protection layer, a back layer, etc. in a magnetic recording medium; and other coating solutions for an adhesive layer, a colored layer, a rust prevention layer, etc., those coating solutions containing a soluble binder or an organic binder.
  • the coating solution was supplied from the center portion of the solution injector.
  • the manifold was filled first with the coating solution containing dyes while the coating solution was supplied at a predetermined flow rate, then the coating solution of the above solution composition containing no dyes (transparent solution) was supplied at the same flow rate, and the time taken for substitution was measured.
  • the test was carried out with respect to three kinds of the plugs provided at the opposite end portions of the manifold, one being a kind in which the inner surface of each plug is a flat surface (Comparative Example), another one being in which the inner surface of each plug has a two-dimensional curved surface, the remainder one being a kind in which the inner surface of each plug has a three-dimensional curved surface.
  • Table 1 The results were as shown in Table 1.
  • composition of the coating solution alkali gelatin + sodium dodecylsulfonate + sodium polystyrenesulfonate + dyes
  • the coating solution water in which red/yellow/blue dyes are added (viscosity of 1 mPa ⁇ s) was used.
  • the coating solution was supplied into the solution injector at a predetermined flow rate so that the manifold was filled with the coating solution, and then 7 weight % solution (100 mPa ⁇ s) of sodium polystyrenesulfonate was supplied at the same flow rate. The time taken for the substitution of this solution for the coating solution was measured. The results are shown in Table 2.
  • the stay of the coating solution at the end surface portion of the manifold is eliminated so that faults of slag and streak can be prevented.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)

Claims (3)

  1. Beschichtungsverfahren, bei dem eine Beschichtungslösung von einem Beschichtungslösung-Zuführungseinlaß (4) zugeführt wird, der an einem Mittelbereich oder an einem Endbereich einer Lösungsspritzdüse (1) vorgesehen ist, dann in Breitenrichtung der Lösungsspritzdüse (1) mittels eines Verteilerstücks (5) verteilt wird und dann aus der Lösungsspritzdüse (1) durch einen Schlitz (2), der einen gleichmäßigen Abstand von dem Verteilerstück (5) aufweist, ausgetragen wird, um dadurch eine Beschichtung auszuführen,
    dadurch gekennzeichnet, daß
    im Falle des Einlasses (4) an dem Mittelbereich beide Endbereiche und im Falle des Einlasses an einem Endbereich der entgegengesetzte Endbereich in Breitenrichtung des Verteilerstücks (5) durch einen Stopfen (3) gebildet werden (wird), und daß in dem Längsschnitt (Y-Y) durch den Schlitz die Form einer Innenfläche des Stopfens (3) eine gekrümmte Fläche aufweist, die tangential mit einem oder beiden Enden des Schlitzes (2) verbunden ist.
  2. Beschichtungsvorrichtung, die eine Lösungsspritzdüse (1) umfaßt, die einen Beschichtungslösung-Zuführungseinlaß (4) aufweist, der an einem Mittelbereich oder an einem Endbereich der Lösungsspritzdüse (1) vorgesehen ist, ein Verteilerstück (5) in Breitenrichtung der Lösungsspritzdüse (1) aufweist und der mit dem Beschichtungslösungs-Zuführungseinlaß (4) in Verbindung steht, einen Schlitz (2) aufweist, der einen gleichmäßigen Abstand von dem Verteilerstück (5) aufweist zum Austragen der Beschichtungslösung und damit verbundenem Ausführen der Beschichtung,
    dadurch gekennzeichnet, daß
    im Falle des Einlasses (4) an dem Mittelbereich beide Endbereiche und im Falle des Einlasses an einem Endbereich der entgegengesetzte Endbereich in Breitenrichtung des Verteilerstücks (5), die (der) von der Beschichtungslösung kontaktiert werden (wird), durch einen Stopfen (3) gebildet wird, und im Längsschnitt (Y-Y) durch den Schlitz die Form der Innenfläche des Stopfens (3) eine gekrümmte Fläche aufweist, die tangential mit dem einen Ende oder beiden Enden des Schlitzes (2) verbunden ist.
  3. Beschichtungsvorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß
    im Horizontalschnitt (X-X) die Form der Innenfläche des Stopfens (3) eine gekrümmte Fläche aufweist.
EP19910119094 1990-11-09 1991-11-08 Verfahren zur Beschichtung und Beschichtungsapparat dazu Expired - Lifetime EP0484980B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP302481/90 1990-11-09
JP2302481A JP2614142B2 (ja) 1990-11-09 1990-11-09 塗布装置

Publications (3)

Publication Number Publication Date
EP0484980A2 EP0484980A2 (de) 1992-05-13
EP0484980A3 EP0484980A3 (en) 1992-11-19
EP0484980B1 true EP0484980B1 (de) 1997-03-19

Family

ID=17909475

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910119094 Expired - Lifetime EP0484980B1 (de) 1990-11-09 1991-11-08 Verfahren zur Beschichtung und Beschichtungsapparat dazu

Country Status (3)

Country Link
EP (1) EP0484980B1 (de)
JP (1) JP2614142B2 (de)
DE (1) DE69125243T2 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2089963C (en) * 1992-03-24 1999-03-16 Solomon T. Korokeyi A liquid passage system for photographic coating devices
US5244149A (en) * 1992-05-05 1993-09-14 Eastman Kodak Company Impinging jet fluid distributor
US5389150A (en) * 1993-03-26 1995-02-14 Eastman Kodak Company Coating hopper inserts
JP3523663B2 (ja) * 1993-05-31 2004-04-26 富士写真フイルム株式会社 塗布装置及び加工方法
JP4824116B2 (ja) * 2000-07-24 2011-11-30 富士フイルム株式会社 溶液製膜用流延ダイ及び溶液製膜方法
JP4514976B2 (ja) * 2000-07-24 2010-07-28 富士フイルム株式会社 溶液製膜用流延ダイ、及び溶液製膜方法
JP4852808B2 (ja) * 2001-08-31 2012-01-11 大日本印刷株式会社 塗工装置
JP4835003B2 (ja) * 2005-02-07 2011-12-14 凸版印刷株式会社 スリットノズル及びスリットノズルの気泡排出方法並びに塗布装置
KR20140099148A (ko) * 2013-02-01 2014-08-11 삼성에스디아이 주식회사 슬러리 코팅 장치
US10315405B2 (en) * 2014-06-23 2019-06-11 Exel Industries Methods and apparatus for applying protective films
WO2017021463A1 (de) * 2015-08-04 2017-02-09 Covestro Deutschland Ag Giessvorrichtung zum auftragen eines aufschäumenden reaktionsgemisches

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH530032A (de) * 1971-08-31 1972-10-31 Ciba Geigy Ag Vorrichtung zum Auftragen photographischer Beschichtungsmassen
DE2944393C2 (de) * 1979-11-02 1981-12-10 Bolton-Emerson, Inc., Lawrence, Mass. Vorrichtung zum Aufbringen einer dünnen Schicht eines Beschichtungsmaterials auf eine laufende Materialbahn
JPS6064662A (ja) * 1983-09-19 1985-04-13 Fuji Photo Film Co Ltd 塗布方法
JPH0671571B2 (ja) * 1987-05-22 1994-09-14 富士写真フイルム株式会社 塗布方法及び装置
JP2520720B2 (ja) * 1989-03-16 1996-07-31 富士写真フイルム株式会社 塗布方法
GB2234457B (en) * 1989-08-04 1992-07-29 Kodak Ltd Self-purging extrusion hopper
JP2520751B2 (ja) * 1989-12-29 1996-07-31 富士写真フイルム株式会社 塗布装置
JP2543952Y2 (ja) * 1990-08-30 1997-08-13 コニカ株式会社 塗布装置

Also Published As

Publication number Publication date
EP0484980A2 (de) 1992-05-13
DE69125243T2 (de) 1997-06-26
DE69125243D1 (de) 1997-04-24
JPH04176360A (ja) 1992-06-24
EP0484980A3 (en) 1992-11-19
JP2614142B2 (ja) 1997-05-28

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