EP0213323B1 - Beschichtungsverfahren und -vorrichtung - Google Patents

Beschichtungsverfahren und -vorrichtung Download PDF

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Publication number
EP0213323B1
EP0213323B1 EP19860109111 EP86109111A EP0213323B1 EP 0213323 B1 EP0213323 B1 EP 0213323B1 EP 19860109111 EP19860109111 EP 19860109111 EP 86109111 A EP86109111 A EP 86109111A EP 0213323 B1 EP0213323 B1 EP 0213323B1
Authority
EP
European Patent Office
Prior art keywords
liquid
bar
application
web
thickness
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
Application number
EP19860109111
Other languages
English (en)
French (fr)
Other versions
EP0213323A3 (en
EP0213323A2 (de
Inventor
Toshiya C/O Fuji Photo Film Co. Ltd. Komai
Sei C/O Fuji Photo Film Co. Ltd. Kawahara
Mitsuhiro C/O Fuji Photo Film Co. Ltd. Ikeda
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 EP0213323A2 publication Critical patent/EP0213323A2/de
Publication of EP0213323A3 publication Critical patent/EP0213323A3/en
Application granted granted Critical
Publication of EP0213323B1 publication Critical patent/EP0213323B1/de
Expired 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
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • 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
    • 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
    • B05C1/12—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 fed round the roller
    • 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
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1039—Recovery of excess liquid or other fluent material; Controlling means 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

Definitions

  • the present invention relates to the improvement of a process for applying a liquid composition to a continuously-moving long flexible carrier (hereinafter often simply referred to as web) in manufacturing a photographic material such as a photographic film and printing paper, a magnetic recording material such as a magnetic recording tape, or a recording material such as pressure-sensitive paper and thermosensitive recording paper, and more particularly relates to an improved method and an improved device, both of which a liquid is applied by a bar.
  • a liquid application process is generally considered consisting of a part (hereinafter referred to as application part) wherein a liquid is transferred to a web, and another part (hereinafter referred to as measuring part) wherein the liquid transferred to the web is measured out to a desired quantity
  • the application methods are classified in terms of the differences in the application part and the measuring part.
  • a roller application method, a dipping application method, a fountain application method and so forth are classified in terms of the difference in the application part, while an air knife application method, a blade application method, a bar application method and so forth are classified in terms of the difference in the measuring part.
  • An extrusion application method, a bead coating method and a curtain application method are known as those in which application and measuring-out are performed in an identical part.
  • the bar application method among others, more than a desired quantity of a liquid is transferred to a web, and the excess portion of the liquid is thereafter scraped down by a bar being at a standstill or rotating in the opposite direction to the moving direction of the web at a lower circumferential velocity than the movement of web, so that the applied liquid is adjusted to the desired quantity. Since the bar application method is characterized in that a thin layer of a liquid can be rapidly applied by a simple device and simple operation, the method is widely used. Though an optional method can be adopted as the application part of the bar application method, a roller application method, particularly a kissing application method, is most widely adopted as the application part in order to utilize the simpleness of the method.
  • Disclosed in the British 1,582,485 or USP 4,263,870 is a method in which a liquid to be applied is supplied to form a liquid accumulation immediately upstream of the contact portion between a bar and a web so as to apply the liquid to the web by the bar.
  • the operation in the method is easy, a large space is not required, and a coating film with a good surface is produced.
  • the thickness of the film of the applied liquid becomes larger at both the side edges of the web than at its other portion due to the surface tension of the liquid composition. Since the following drying of the liquid is caused to be nonuniform by the larger thickness of the film, it is desirable to make the thickness of the film uniform along the total width of the web before the liquid is dried.
  • a nozzle for sucking off an applied liquid portion is provided at each side edge of a web.
  • the nozzle is defined by L-shaped double tubes.
  • a spray or jet of a diluting liquid or solvent is supplied from the peripheral portion of the nozzle and the applied liquid portion is sucked off together with the diluting liquid or solvent by the central portion thereof.
  • the above-mentioned object of the present invention is achieved with a method of applying a liquid to a continuously moving web and a device therefor.
  • the liquid to be applied is supplied to form a liquid accumulation immediately upstream of the contact portion between a rotating bar and a continuously-moving web so as to apply the liquid to the web.
  • the method and the device are characterized in that the effective application length of the bar is set to be shorter than the width of the web so as to prevent the liquid from flying away, and the excess portion of the liquid is sucked along the end faces of the bar.
  • Fig. 1 shows a wire bar or grooved bar 1 which is rotated in the same direction as the moving direction of a continuously-moving web 2.
  • a bar supporting member 4 is disposed along the total length of the bar 1 so as to prevent the bar 1 from sagging and to serve as a liquid feeder for supplying the bar 1 with a liquid 3 to be applied.
  • the liquid 3 is supplied into a liquid guide groove 7 defined between the bar supporting member 4 and a weir member 6, through a liquid supply port 5 of the bar supporting member 4, and is then taken up by the rotating bar 1 and applied to the web 2.
  • the quantity of the liquid 3 is measured out at the contact portions of the bar 1 and the web 2 so that only a desired quantity of the liquid 3 is applied to the web 2 and the other quantity of the liquid flows down.
  • the flowed-down liquid and the newly supplied liquid form a liquid reservoir 8.
  • the liquid 3 is applied to the web 2 through the liquid reservoir 8, in a stationary state. Since the liquid 3 is applied to the web 2 from the liquid reservoir 8, the surface of the film 9 of the applied liquid 3 is improved in comparison with conventional methods.
  • the bar 1 has not only a function of transferring the liquid 3 and applying it to the web 2 but also a function of measuring out the applied liquid to a desired quantity, the whole equipment for the application is made compact, the space for the equipment is efficiently utilized, and the setting of various conditions and operation are facilitated.
  • the effective application length of the bar 1 is made shorter than the width of the web 2 in accordance with the present invention, as shown in Fig. 2, to prevent the liquid 3 from flying away from the bar 1 due to the centrifugal force thereof.
  • the excess portion 12 of the liquid 3 is sucked through suction openings 11 along the end faces 10 of the bar 1, as shown in Fig. 3.
  • the thickness of the applied liquid film on the web 2 is thus kept from becoming larger at both the side edges of the web.
  • each end face 10 of the bar 1 has a recess almost concentric with the bar as shown in Fig. 4.
  • An outer portion defining each suction opening 11 is of a static type and is provided with such a contour that the outer portion is kept fitted with the bar 1, As a result, the excess liquid portion 12 can bridge very little.
  • the form of each end face 10 of the bar 1 may be otherwise determined as shown Figs. 5, 6 and 7.
  • the thickness 1 of each peripheral edge portion of the bar 1 is set at 1 mm or less, preferably at 0.1 to 0.5 mm.
  • Wood pulp (LBKP) is beaten in 300 ml. of Canadian freeness. Sodium stearate is added to the wood pulp so that the weight of the sodium stearate is equal to 1.0 % of the completely dry weight of the pulp. After that, 1.5 % (by weight to the completely dry weight of the pulp) of aluminum sulfate and 0.5 % of a polyamide polyamine epichlorohydrin (Kymene 557 which is a commercial product made by Dick Hercules) are added to the mixture. 0.3 % of an alkyl ketene dimer (Aquapel which is a commercial product made by Dick Hercules) is then added to the mixture.
  • the mixture is thereafter made into paper in a conventional method so that the paper has an area quantity of 150 g/m 2 . 1 % (by weight to the of the paper) of calcium chloride is caused to cling to the paper by surface sizing. After the paper is dried, it is calendered to a thickness of 160 gm.
  • the reverse side of the paper is coated with a polyethylene of about 0.930 g/ml in density so that the thickness of the polyethylene is set at about 0.033 mm.
  • the obverse side of the paper is coated with a polyethylene which has a density of about 0.960 g/ml and which contains 10 % by weight of titanium oxide, so that the thickness of the polyethylene is set at about 0.030 mm.
  • a long flexible carrier which has a thickness of 230 ⁇ m and a width of 1,400 mm and is to be used to make printing paper, is thus obtained.
  • a liquid having a composition shown in Table 1 below is applied to the reverse side of the carrier, at an application speed of 180 m/min. and a quantity ratio of 6 ml./m 2 , by a wire bar application device shown in Figs. 1, 2, 3 and 4.
  • the wire bar and wire of the application device are made of stainless steel and have diameters of 50 mm and 0.08 mm, respectively.
  • the wire bar and the wire are rotated at a circumferential velocity equal to the application speed.
  • the effective application length of the bar is set at 1,374 mm as against the carrier's width of 1,400 mm.
  • the bar support of the device is made of a polytetrafluoroethylen.
  • the thickness I of each peripheral edge portion of the bar is 0.5 mm.
  • Each suction opening is defined by a high-density polyethylene and has an effective diameter of 2mm.
  • the pressure for sucking the liquid is 133,32 mbar (100 mmHg).
  • the quantity of the colloidal silica contained in the film is detected by a fluorescent X-ray measuring instrument so as to plot the standardized ratio (along the axis of the ordinate) of the applied liquid quantity in the direction (along the axis of the abscissa) of the width of the carrier, as shown in Fig. 8.
  • a liquid of the same composition as that shown in Table 1 is applied, at an application speed of 180 m/min. and a quantity ratio of 6 ml./m 2 , to the reverse side of the same long flexible carrier as that obtained in the above-described embodiment of the present invention, by a conventional wire bar application device.
  • the effective application length of the wire bar of the device is set at 1,460 mm.
  • Suction openings as provided according to the present invention are not provided in the comparative example.
  • the other conditions are the same as that of the above-described embodiment.
  • the thickness of the applied film is kept from becoming larger at both the side edges of the carrier, as described above. For that reason, the reduction of load of drying, the improvement of yield and the rationalization of maintenance work can be realized in the production of a recording material, which includes an application process and a drying process.

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

Claims (6)

1. Ein Verfahren zum Auftragen einer Flüssigkeit auf eine sich kontinuierlich bewegende Bahn, in welchem die aufzutragende Flüssigkeit (3) zugeführt wird, um ein Flüssigkeitsreservoir (8) unmittelbar bahnaufwärts vom Kontaktbereich zwischen einem rotierenden Stab (1) und der sich kontinuierlich bewegenden Bahn (2) zu bilden, damit die genannte Flüssigkeit (3) auf die genannte Bahn (2) aufgetragen wird, dadurch gekennzeichnet, daß die effektive Auftragungslänge des genannten Stabes (1) kürzer als die Breite der genannten Bahn (2) ist, um zu verhindern, daß die genannte Flüssigkeit (3) weggetrieben wird; und überschüssige Flüssigkeit (12) entlang den Stirnflächen (10) des genannten Stabes (1) aufgesaugt wird.
2. Eine Vorrichtung zum Auftragen einer Flüssigkeit auf eine sich kontinuierlich bewegende Bahn, in welcher eine aufzutragende Flüssigkeit (3) zugeführt wird, um ein Flüssigkeitsreservoir (8) unmittelbar bahnaufwärts von den Kontaktbereichen eines rotierenden Stabes (1) und einer sich kontinuierlich bewegenden Bahn (2) zu bilden, damit die genannte Flüssigkeit (3) auf die genannte Bahn (2) aufgetragen wird, dadurch gekennzeichnet, daß Saugöffnungen (11) an beiden Stirnflächen (10) des genannten effektiven Auftragungslängenabschnitts des genannten Stabs (1) vorgesehen sind, der in Betrieb kürzer als die Breite der genannten Bahn (2) eingestellt ist.
3. Eine Vorrichtung zum Auftragen nach Anspruch 2, dadurch gekennzeichnet, daß beide Stirnflächen (10) des effektiven Auftragungslängenabschnitts des genannten Stabs (1) Vertiefungen aufweisen, die nahezu konzentrisch zum genannten Stab (1) sind; und Außenbereiche, die die genannten Saugöffnungen (11) definieren, solche Konturen aufweisen, daß die genannten Außenbereiche mit den genannten Vertiefungen versehen sind.
4. Eine Vorrichtung zum Auftragen nach Anspruch 3, dadurch gekennzeichnet, daß die genannten Außenbereiche, die die genannten Saugöffnungen (11) definieren, von der statischen Ausführung sind.
5. Eine Vorrichtung zum Auftragen nach Anspruch 2, 3 oder 4, dadurch gekennzeichnet, daß jeder periphere Randbereich des genannten Stabes (1) eine Dicke von 1 mm oder weniger aufweist.
6. Eine Vorrichtung zum Auftragen nach Anspruch 2, 3 oder 4, dadurch gekennzeichnet, daß jeder periphere Randbereich des genannten Stabes (1) eine Dicke von 0,1 mm bis 0,5 mm aufweist.
EP19860109111 1985-07-04 1986-07-03 Beschichtungsverfahren und -vorrichtung Expired EP0213323B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP14712385A JPS627467A (ja) 1985-07-04 1985-07-04 塗布方法及び装置
JP147123/85 1985-07-04

Publications (3)

Publication Number Publication Date
EP0213323A2 EP0213323A2 (de) 1987-03-11
EP0213323A3 EP0213323A3 (en) 1987-11-04
EP0213323B1 true EP0213323B1 (de) 1989-10-11

Family

ID=15423060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860109111 Expired EP0213323B1 (de) 1985-07-04 1986-07-03 Beschichtungsverfahren und -vorrichtung

Country Status (3)

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EP (1) EP0213323B1 (de)
JP (1) JPS627467A (de)
DE (1) DE3666151D1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0376207A3 (de) * 1988-12-26 1991-07-03 Fuji Photo Film Co., Ltd. Auftragsvorrichtung
JP3758098B2 (ja) * 1995-10-16 2006-03-22 富士写真フイルム株式会社 塗布方法および塗布装置
JP2002182375A (ja) * 2000-12-13 2002-06-26 Fuji Photo Film Co Ltd 平版印刷版製造方法及び平版印刷版製造装置
JP7084433B2 (ja) * 2020-01-14 2022-06-14 日東電工株式会社 塗工機、フィルムの製造システム、および、フィルムの製造方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899339A (en) * 1957-08-23 1959-08-11 Foating to a moving web
JPS584589B2 (ja) * 1976-08-12 1983-01-27 富士写真フイルム株式会社 塗布方法
JPS584589A (ja) * 1981-07-01 1983-01-11 川嶋工業株式会社 ナイフ等の鞘
JPS59142063U (ja) * 1983-03-15 1984-09-22 日立マクセル株式会社 ウエブ塗工面の処理装置

Also Published As

Publication number Publication date
JPS627467A (ja) 1987-01-14
DE3666151D1 (en) 1989-11-16
EP0213323A3 (en) 1987-11-04
JPH0582271B2 (de) 1993-11-18
EP0213323A2 (de) 1987-03-11

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