CN101632973B - Curtain coating method and curtain coating apparatus - Google Patents

Curtain coating method and curtain coating apparatus Download PDF

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Publication number
CN101632973B
CN101632973B CN 200910151691 CN200910151691A CN101632973B CN 101632973 B CN101632973 B CN 101632973B CN 200910151691 CN200910151691 CN 200910151691 CN 200910151691 A CN200910151691 A CN 200910151691A CN 101632973 B CN101632973 B CN 101632973B
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China
Prior art keywords
claw
curtain
coating fluid
liquid film
residue
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CN101632973A (en
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小堀英之
花井修司
清水智仁
长泽信幸
原哲也
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Ricoh Co Ltd
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Ricoh Co Ltd
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Priority claimed from JP2009120552A external-priority patent/JP5439945B2/en
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to CN201310054897.1A priority Critical patent/CN103182356B/en
Publication of CN101632973A publication Critical patent/CN101632973A/en
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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
    • B05C5/005—Curtain coaters
    • 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

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  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The invention provides a curtain coating apparatus including: a slit from which at least one layer of a coating liquid is ejected; a curtain edge guide configured to guide the ejected coating liquid in the form of a curtain liquid film and make the coating liquid fall freely, while pouring an auxiliary liquid from the whole of a surface provided in contact with the coating liquid in the curtain edge guide, so as to apply the coating liquid onto a continuously running web; and a claw which supports the curtain liquid film at a bottom of the curtain edge guide, wherein when a residue of the liquid is left on the claw, the claw is configured to move.

Description

The curtain coating device
Technical field
The present invention relates to curtain coating method and curtain coating device, in particular to following curtain coating method and curtain coating device: wherein one deck coating fluid sprays from slit at least, and by using curtain limit guide rail that the coating fluid that sprays is freely fallen, described curtain limit guide rail guides coating fluid with the form of curtain formula liquid film, thereby coating fluid is applied on the coiled material of continuous operation.
Background technology
Curtain coating method is to produce for example coating process commonly used during film of light-sensitive material and analog.In curtain coating method, for example, there is such method, it comprises from the nozzle slot of curtain coating head 1 and sprays coating fluid, by using curtain limit guide rail 2 coating fluid that sprays is freely fallen, and described curtain limit guide rail guides coating fluid with the form of curtain formula liquid film, thereby form curtain formula liquid film 3, and described curtain formula liquid film 3 is formed with the coiled material 5 of continuously operation contact, film to form at coiled material, as shown in Figure 1; And there is such method, it comprises spray coating fluid from slit, the coating fluid that sprays is moved on the slidingsurface 7, by using curtain limit guide rail 2 that coating fluid is freely fallen, described curtain limit guide rail is with the form guiding coating fluid of curtain formula liquid film, thus formation curtain formula liquid film 3, and described curtain formula liquid film 3 is contacted with the coiled material 5 of continuous service, film to form at coiled material, as shown in Figure 2.Similarly, for multi-layer coated, there is a kind of method, it comprises the coating fluid that ejection has various functions from each nozzle slot, by using curtain limit guide rail that the coating fluid that sprays is freely fallen, described curtain limit guide rail is with the form guiding coating fluid of curtain formula liquid film, and described curtain limit liquid film is formed with the coiled material of continuous service to be contacted, film to form at coiled material, and there is a kind of method, it comprises the coating fluid that ejection has various functions from each slit, the coating fluid that sprays is deposited on the slidingsurface, by using curtain limit guide rail the coating fluid of precipitation is freely fallen, described curtain limit guide rail is with the form guiding coating fluid of curtain formula liquid film, and described curtain formula liquid film is formed with the coiled material of continuous service contact, thereby film in coiled material formation.
What remark additionally is, in this based film formation method, caused phenomenon is when coating fluid flows along curtain limit guide rail, coating fluid slowly flows in two edges of the curtain formula liquid film that is formed by curtain limit guide supporting, and the coating fluid in curtain formula liquid film edge flows in the mode that moves towards central side, and reason is that the coating fluid of curtain formula liquid film edge is different with the flow velocity between the coating fluid on the curtain formula liquid film central side.Thereby, contact so that when coiled material formation was filmed, it has such shortcoming: accompanying coating liquid measure became larger with respect to width in the edge of filming when making the coating fluid free-falling and the coiled material of formed curtain formula liquid film and continuous service being formed.As a result, when dried coating film, have easily not stem portion, this causes adhesion when product is wound, and edge swell, and it causes the coiled material cutting when product is wound, thereby has reduced production efficiency.
As the trial that prevents that afore-mentioned from occuring, baking temperature can raise.Yet, there is such problem, with regard to regard to the heat-sensitive paper coating, when the temperature of filming is high, the heat-sensitive paper colour developing, thereby in product, cause defective.Therefore, in many cases, the rising baking temperature is unhelpful.
The phenomenon that is being coated with film edge and becomes larger for the amount that prevents accompanying coating fluid, exist the method for knowing, it comprises freely falls coating fluid, pour into auxiliary liquid along the marginal portion at the two ends of the curtain limit guide rail that supports formed curtain formula liquid film simultaneously, thereby the coating fluid flow velocity that makes the coating fluid flow velocity of edge and center is more near (reference example as, Japanese Patent Application Publication (JP-A) number 2000-513,2000-218209,2001-104856,2005-512768 and 2008-93656).As shown in Figure 3, auxiliary liquid (auxiliary liquid 9) is absorbed in the bottom of curtain limit guide rail 2 and therefore is recovered.
Yet when auxiliary liquid was recovered, a small amount of coating fluid also was recovered, thereby caused that the residue (S) of liquid gathers on claw 10 He in the suction inlet 11, as shown in Figure 4.This is a kind of phenomenon that is caused by following reason: when auxiliary liquid 9 is recovered, because the absorption on coiled material, air is rapid flow in position, promote the surface of the guide edge contact claw 10 of the curtain formula liquid film on the coating fluid, and the relative edge at coiled material advances directed face, thereby the coating fluid that slowly flows contacts with the dried place of claw.In continuous production, residue (S) gathers at the claw 10 that places guide rail 2 bottoms, curtain limit in time, because residue (S), curtain formula liquid film 3 becomes and can not be supported by the edge of claw 10, this so that curtain formula liquid film 3 to bias internal, therefore and the amount of accompanying coating fluid becomes larger with respect to width in the edge of filming.As a result, inhomogeneous coating width causes huge production loss when producing.Similarly, because it is larger that aforementioned quantities becomes, because there is not drying nest easily in dry insufficient when producing, in process of production, coating fluid may be attached on the feeding-in roll of coiled material, and the film coated surface of making subsequently coiled material dirty is when product is wound, may stick together, and edge swell when being wound owing to product, described coiled material may be cut off, thereby has reduced production efficiency.
For the swing that prevents curtain formula liquid film in the curtain coating method with to bias internal, JP-A 11-188299 (Troller Schweizer Engineering) discloses a kind of curtain coating method, described method comprises uses porous material to be used for curtain limit guide rail, with will assist liquid to be poured into equably to be set to surface that curtain coating liquid in the guide rail of curtain limit contacts on.Simultaneously, JP-A 2001-46939 (MITSUBISHI PAPER MILLS LIMITED.) discloses curtain coating method, and it comprises that the use glass plate is for the surface that is set to contact with the curtain coating liquid of curtain limit guide rail.Yet these patents (JP-A 11-188299 and JP-A 2001-46939) are the not openly coating fluid residue of curtain limit guide rail bottom and the removal of auxiliary liquid all.
Figure 18 A has schematically shown curtain formula liquid film not to the situation of bias internal, and Figure 18 B has then schematically shown the situation of curtain formula liquid film to bias internal.
Summary of the invention
In view of the problems referred to above in the association area have designed the present invention, and target of the present invention provides curtain coating method and curtain coating device, wherein can effectively prevent liquid residue in the suction inlet of being located at curtain limit guide rail bottom and gathering on the claw (claw), and thereby can reduce curtain formula liquid film guide rail place, curtain limit to bias internal.
In order to address the above problem, have following by＜1 according to curtain coating method of the present invention and curtain coating device〉to＜60〉the concrete technical characterictic of expression.
＜1〉curtain coating method comprises: spray at least one deck coating fluid from slit; And by using curtain limit guide rail that the coating fluid that sprays is freely fallen, described curtain limit guide rail is with the form guiding coating fluid of curtain formula liquid film, pour into auxiliary liquid from the whole surface that is set to contact with coating fluid the guide rail of curtain limit simultaneously, thereby coating fluid is applied on the coiled material of continuous service, wherein be left on claw---it is provided at curtain limit guide rail bottom support curtain formula liquid film---when upper when described liquid residue, described claw is configured to mobile.
＜2〉according to＜1〉curtain coating method, wherein said claw is configured to be applied on the coiled material at described coating fluid and moves around after a period of time at least.
＜3〉according to＜1〉curtain coating method, wherein said coating fluid is applied to the described claw that moves around continuously simultaneously on the described coiled material.
＜4〉according to＜2〉and＜3 one of curtain coating method, the speed that wherein said claw moves around 0.00005m/ second to the 0.005m/ scope of second.
＜5〉according to＜1〉curtain coating method, wherein said claw is discoid claw, and described discoid claw is configured to be applied on the described coiled material at described coating fluid and rotates after a period of time at least.
＜6〉according to＜1〉curtain coating method, wherein said claw is discoid claw, and described coating fluid is applied to and continues simultaneously the described discoid claw of rotation on the coiled material.
＜7〉according to＜5〉and＜6 one of curtain coating method, the radius of wherein said discoid claw is in the scope of 10mm to 50mm.
＜8〉according to＜5〉to＜7 in each curtain coating method, the speed of wherein said discoid claw rotation 0.0001m/ second to the 0.05m/ scope of second.
＜9〉according to＜1〉to＜8 in each curtain coating method, wherein said coating fluid is applied on the described coiled material, described claw has the edge that tilts with an angle simultaneously.
＜10〉according to＜9〉curtain coating method, wherein said angle is in 0 ° to 45 ° scope.
＜11〉according to＜1〉to＜10 in each curtain coating method, wherein said curtain limit guide rail is provided with magnetic material, and partly or entirely being made by magnetic material or being made by the material that the magnetic material of curtain limit guide rail attracts of described claw.
＜12〉according to＜1〉curtain coating method, wherein said claw is for band shape and to be configured to be applied to described coiled material at described coating fluid mobile after a period of time at least.
＜13〉according to＜1〉curtain coating method, wherein said claw is band shape, and described coating fluid is applied to and continues simultaneously mobile described claw on the described coiled material.
＜14〉according to＜12〉and＜13 one of curtain coating method, the speed that wherein said claw moves 0.00005m/ second to the 0.005m/ scope of second.
＜15〉according to＜1〉to＜14 in each curtain coating method, wherein said claw has the coating fluid contact surface that hydrophobic elements forms.
＜16〉according to＜1〉to＜15 in each curtain coating method, the liquid residue that wherein accumulates on the described claw is eliminated.
＜17〉according to＜16〉curtain coating method, wherein brush is used to remove described liquid residue.
＜18〉according to＜16〉curtain coating method, wherein doctor blade is used to remove described liquid residue.
＜19〉curtain coating device comprises: slit, and one deck coating fluid is from wherein ejection at least; Curtain limit guide rail, it is configured to guide the coating fluid that is sprayed with the form of curtain formula liquid film, and described coating fluid is freely fallen, pour into auxiliary liquid from the whole surface that is set to contact with coating fluid the guide rail of curtain limit simultaneously, thereby coating fluid is applied on the coiled material of continuous service; And claw, it is at curtain limit guide rail bottom support curtain formula liquid film, and wherein when liquid residue was stayed on the claw, described claw was configured to mobile.
＜20〉according to＜19〉the curtain coating device, wherein said claw is configured to move around.
＜21〉according to＜19〉the curtain coating device, wherein said claw is configured to move around constantly.
＜22〉according to＜20〉and＜21 one of the curtain coating device, the speed that wherein said claw moves around 0.00005m/ second to the 0.005m/ scope of second.
＜23〉according to＜19〉the curtain coating device, wherein said claw is discoid claw, and described discoid claw is configured to rotation.
＜24〉according to＜19〉the curtain coating device, wherein said claw is discoid claw, and described discoid claw is configured to continue rotation.
＜25〉according to＜23〉and＜24 one of the curtain coating device, the radius of wherein said discoid claw is in the scope of 10mm to 50mm.
＜26〉according to＜23〉to＜25 in each curtain coating device, the speed of wherein said discoid claw rotation 0.0001m/ second to the 0.05m/ scope of second.
＜27〉according to＜19〉to＜26 in each curtain coating device, wherein said claw has the edge that tilts with an angle.
＜28〉according to＜27〉the curtain coating device, wherein said angle is in 0 ° to 45 ° scope.
＜29〉according to＜19〉to＜28 in each curtain coating device, wherein said curtain limit guide rail is provided with magnetic material, and partly or entirely the making by magnetic material or by the material that the magnetic material of curtain limit guide rail attracts of described claw.
＜30〉according to＜19〉the curtain coating device, wherein said claw is for band shape and be configured to mobile.
＜31〉according to＜19〉the curtain coating device, wherein said claw is for band shape and be configured to continue mobile.
＜32〉according to＜30〉and＜31 one of the curtain coating device, the speed that wherein said claw moves 0.00005m/ second to the 0.005m/ scope of second.
＜33〉according to＜19〉to＜32 in each curtain coating device, wherein said claw has the coating fluid contact surface that hydrophobic elements forms.
＜34〉according to＜19〉to＜33 in each curtain coating device, further comprise being configured to remove the unit that accumulates in the liquid residue on the described claw.
＜35〉according to＜34〉the curtain coating device, wherein said unit is brush.
＜36〉according to＜34〉the curtain coating device, wherein said unit is doctor blade.
＜37〉curtain coating method comprises: spray at least one deck coating fluid from slit; With by using curtain limit guide rail that the coating fluid that sprays is freely fallen, described curtain limit guide rail is with the form guiding coating fluid of curtain formula liquid film, pour into auxiliary liquid from the whole surface that is set to contact with coating fluid the guide rail of curtain limit simultaneously, thereby coating fluid is applied on the coiled material of continuous service, wherein extra auxiliary liquid is poured on the curtain formula liquid film contact surface of claw, and described claw is provided at described curtain limit guide rail bottom support curtain formula liquid film.
＜38〉according to＜37〉curtain coating method, wherein said coating fluid is applied on the described coiled material, described claw has the edge that tilts with an angle.
＜39〉according to＜38〉curtain coating method, wherein said angle is 0 ° to 45 ° scope.
＜40〉according to＜37〉to＜39 in each curtain coating method, the edge of wherein said claw has 0.4mm or following thickness.
＜41〉according to＜37〉to＜40 in each curtain coating method, wherein use pour tube (pouringpipe), described extra auxiliary liquid is provided to the curtain formula liquid film contact surface of described claw, and described extra auxiliary liquid is contacted, in order to flow at this curtain formula liquid film contact surface with curtain formula liquid film contact surface.
＜42〉according to＜37〉to＜41 in each curtain coating method, wherein use a pour tube/described pour tube, described extra auxiliary liquid is offered described claw, and described extra auxiliary liquid pours into from the edge of described claw.
＜43〉according to＜37〉to＜42 in each curtain coating method, wherein use a pour tube/described pour tube, described extra auxiliary liquid is offered described claw, and make described extra auxiliary liquid flow out the curtain formula liquid film contact surface of described claw, thereby flow at curtain formula liquid film contact surface.
＜44〉according to＜37〉to＜43 in each curtain coating method, the curtain formula liquid film contact surface of wherein said claw is formed by the super hydrophilic membrane that comprises super water wetted material.
＜45〉according to＜44〉curtain coating method, wherein said super hydrophilic membrane comprises photochemical catalyst.
＜46〉according to＜45〉curtain coating method, wherein with the described claw of irradiation so that maintenance package is contained in the excitation state of the photochemical catalyst in the described super hydrophilic membrane.
＜47〉according to＜46〉curtain coating method, wherein said claw is made by the ultraviolet (uv) transmission element, the claw surface that never forms super hydrophilic membrane applies light, and so the excitation state of described photochemical catalyst be maintained.
＜48〉according to＜44〉to＜47 in each curtain coating method, wherein when the residue of described liquid is stayed on the described claw, described claw is configured to movement.
＜49〉curtain coating device comprises: slit, and one deck coating fluid is from wherein ejection at least; Curtain limit guide rail, it is configured to guide the coating fluid that is sprayed with the form of curtain formula liquid film, and described coating fluid is freely fallen, pour into auxiliary liquid from the whole surface that is set to contact with coating fluid the guide rail of curtain limit simultaneously, thereby coating fluid is applied on the coiled material of continuous service; Claw, it is configured at curtain limit guide rail bottom support curtain formula liquid film, and the unit, and it is configured to extra auxiliary liquid is poured into the curtain formula liquid film contact surface of described claw.
＜50〉according to＜49〉the curtain coating device, wherein said claw has the edge that tilts with an angle.
＜51〉according to＜50〉the curtain coating device, wherein said angle is in 0 ° to 45 ° scope.
＜52〉according to＜49〉to＜51 in each curtain coating device, the edge of wherein said claw has 0.4mm or following thickness.
＜53〉according to＜49〉to＜52 in each curtain coating device, further comprise pour tube, be used for extra auxiliary liquid is offered the curtain formula liquid film contact surface of described claw, and unit, it is configured to make described extra auxiliary liquid to contact with the curtain formula liquid film contact surface of described claw, so that described extra auxiliary liquid flows at described curtain formula liquid film contact surface.
＜54〉according to＜49〉to＜53 in each curtain coating device, (further) comprises one/described pour tube, be used for extra auxiliary liquid is offered described claw, and the unit, it is configured to pour into from the edge of described claw described auxiliary liquid additionally.
＜55〉according to＜49〉to＜54 in each curtain coating device, (further) comprises one/described pour tube, be used for extra auxiliary liquid is offered described claw, and unit, it is configured to make described extra auxiliary liquid to flow out the curtain formula liquid film contact surface of described claw, so that it flows at described curtain formula liquid film contact surface.
＜56〉according to＜49〉to＜55 in each curtain coating device, the curtain formula liquid film contact surface of wherein said claw is formed by the super hydrophilic membrane that comprises super water wetted material.
＜57〉according to＜56〉the curtain coating device, wherein said super hydrophilic membrane comprises photochemical catalyst.
＜58〉according to＜57〉the curtain coating device, further comprise the light irradiation device that is configured to the super-hydrophobic film of the described claw of irradiation.
＜59〉according to＜58〉the curtain coating device, wherein said claw is made by the ultraviolet (uv) transmission element, and described light is applied in by the claw surface that described light irradiation device never forms described super hydrophilic membrane.
＜60〉according to＜55〉to＜59 in each curtain coating device, wherein when the residue of described liquid is stayed on the described claw, described claw is configured to movement.
According to the present invention, curtain coating method and curtain coating device can be provided, wherein can effectively stop gathering on the claw that liquid residue provides in curtain limit guide rail bottom, and therefore can reduce curtain formula liquid film guide rail place, described curtain limit to bias internal.
Description of drawings
Fig. 1 is the perspective view that shows the structure example of traditional curtain coating device.
Fig. 2 is the perspective view that shows another structure example of traditional curtain coating device.
Fig. 3 is the schematic diagram that is presented near the structure the curtain formula liquid film edge that is formed by coating fluid in traditional curtain coating device.
Fig. 4 is for the schematic diagram of explanation curtain formula liquid film to bias internal.
Fig. 5 A is the schematic plan that shows the structure example of curtain coating device, and described curtain coating device is provided with the claw at curtain limit guide rail bottom support curtain formula liquid film.
Fig. 5 B is the schematic elevational view of the curtain coating device shown in Fig. 5 A.
Fig. 5 C is the schematic side elevation of the curtain coating device shown in Fig. 5 A.
Fig. 6 is the schematic elevational view that shows the structure example of curtain coating device---wherein claw 101 edge tilts with an angle---.
Fig. 7 A is the schematic elevational view that shows the structure example of curtain coating device---wherein claw 101 is connected with curtain limit guide rail 2 easily---.
Fig. 7 B is the perspective schematic view of the curtain coating device shown in Fig. 7 A.
Fig. 8 A is the schematic plan that shows the structure example of curtain coating device, and described curtain coating device is provided with the unit that is configured to remove the residue that gathers at claw 101.
Fig. 8 B is the schematic elevational view of the curtain coating device shown in Fig. 8 A.
Fig. 9 A is the schematic plan that shows the structure example of curtain coating device, and described curtain coating device is provided with another unit that is configured to remove the liquid residue that gathers at claw 101.
Fig. 9 B is the schematic elevational view of the curtain coating device shown in Fig. 9 A.
Figure 10 A is presented at the discoid claw 102 of rotation and the figure of the position relationship between the guide rail of curtain limit.
Figure 10 B is the schematic elevational view that shows the structure example of curtain coating device, and described curtain coating device is provided with the claw 102 at curtain limit guide rail bottom support curtain formula liquid film.
Figure 11 is the schematic elevational view that shows the structure example of curtain coating device---wherein the edge of claw 102 (outer peripheral portion) tilts with an angle---.
Figure 12 A is the schematic elevational view that shows the structure example of curtain coating device---wherein claw 102 is connected with curtain limit guide rail 2 easily---.
Figure 12 B is the perspective view of the curtain coating device shown in Figure 12 A.
Figure 13 A is the schematic plan that shows the structure example of curtain coating device, and described curtain coating device is provided with the unit that is configured to remove the liquid residue that gathers at claw 102.
Figure 13 B is the schematic elevational view that is presented at the curtain coating device among Figure 13 A.
Figure 14 A is the schematic plan that shows the structure example of curtain coating device, and described curtain coating device is provided with another unit that is configured to remove the liquid residue that gathers at claw 102.
Figure 14 B is the schematic elevational view of the curtain coating device shown in Figure 14 A.
Figure 14 C is the schematic side elevation of the curtain coating device shown in Figure 14 A.
Figure 15 A is the schematic side elevation that shows the structure example of curtain coating device, and described curtain coating device is provided with the claw 103 at curtain limit guide rail bottom support curtain formula liquid film.
Figure 15 B is the schematic elevational view of the curtain coating device shown in Figure 15 A.
Figure 15 C is the schematic plan of the curtain coating device shown in Figure 15 A.
Figure 16 A is the schematic plan that shows the structure example of curtain coating device, and described curtain coating device is provided with the unit that is configured to remove the liquid residue that gathers at claw 103.
Figure 16 B is the schematic elevational view of the curtain coating device shown in Figure 16 A.
Figure 17 A is the schematic plan that shows the structure example of curtain coating device, and described curtain coating device is provided with another unit that is configured to remove the liquid residue that gathers at claw 103.
Figure 17 B is the schematic elevational view of the curtain coating device shown in Figure 17 A.
Figure 18 A shows that curtain formula liquid film is not to the schematic diagram of the state of bias internal.
Figure 18 B shows that curtain formula liquid film is to the schematic diagram of bias internal.
Figure 19 A is the perspective schematic view that shows the structure example of curtain coating device of the present invention.
Figure 19 B is near the cross-sectional view of claw of the curtain coating device shown in Figure 19 A.
Figure 20 shows the angle of claw edge tilt of curtain coating device of the present invention and the illustrative figure of described claw edge thickness.
Figure 21 is the illustrative figure of curtain coating device of the present invention, shows for assisting liquid to be poured into the example of the pour tube on the claw.
Figure 22 is the illustrative figure of example that shows the one side of curtain coating device of the present invention, and wherein auxiliary liquid is poured into from the edge of claw.
Figure 23 is the illustrative figure of another example that shows the one side of curtain coating device of the present invention, thereby the liquid contact surface that auxiliary liquid flows out claw is flowed at described liquid contact surface.
Figure 24 is the cross-sectional view of the claw of curtain coating device of the present invention, shows claw and is provided with super hydrophilic membrane as its surperficial aspect.
Figure 25 is the schematic diagram that shows the structure example of curtain coating device of the present invention---it comprises light irradiation device---.
Figure 26 is the cross-sectional view of the curtain limit guide rail of curtain coating device of the present invention, and described curtain coating device also comprises light irradiation device and is provided with the claw of ultraviolet ray-transmissive element.
Figure 27 A is the perspective view of the structure example of curtain coating device of the present invention, and it shows the aspect that claw is disc-shape and rotation.
Figure 27 B is the cross-sectional view of the curtain coating device shown in Figure 27 A.
Figure 28 A is the schematic plan of the structure example of curtain coating device of the present invention, and it shows the aspect that claw moves around.
Figure 28 B is the cross-sectional elevational view of the curtain coating device shown in Figure 28 A.
Figure 29 A is the schematic plan of the structure example of curtain coating device of the present invention, and showing claw is with shape and lasting mobile aspect.
Figure 29 B is the cross-sectional elevational view of the curtain coating device shown in Figure 29 A.
The specific embodiment
The invention provides curtain coating device and curtain coating method, wherein stayed claw---it is provided at curtain limit guide rail bottom support curtain formula liquid film---when upper when liquid residue, described residue is removed.
Broadly, as the unit of removing residue (method), following will being illustrated: unit (and method) is used for moving described claw when liquid residue is stayed on the claw; And unit (and method), be used for assisting liquid to be poured into the curtain formula liquid film contact surface of claw.Should be noted that curtain coating device of the present invention (and curtain coating method) can use this two kinds of unit (method).
The present invention includes following (A) and (B).
(A) curtain coating method comprises: spray at least one deck coating fluid from slit; And by using curtain limit guide rail that the coating fluid that sprays is freely fallen, described curtain limit guide rail is with the form guiding coating fluid of curtain formula liquid film, pour into auxiliary liquid from the whole surface of being arranged to contact with coating fluid the guide rail of curtain limit simultaneously, thereby coating fluid is applied on the coiled material of continuous service, wherein stayed claw---it is provided at curtain limit guide rail bottom support curtain formula liquid film---when upper when the residue of described liquid, described claw is configured to mobile.
(B) curtain coating device comprises: slit---one deck coating fluid is from wherein ejection at least; Curtain limit guide rail, it is configured to guide the coating fluid that is sprayed with the form of curtain formula liquid film, and described coating fluid is freely fallen, pour into auxiliary liquid from the whole surface of being arranged to contact with coating fluid the guide rail of curtain limit simultaneously, thereby coating fluid is applied on the coiled material of continuous service; And claw, it is at curtain limit guide rail bottom support curtain formula liquid film, and wherein when liquid residue was left on the described claw, described claw was configured to mobile.
Particularly, the invention provides curtain coating method and curtain coating device, wherein be left on claw---it is provided at curtain limit guide rail bottom support curtain formula liquid film---when upper when liquid residue, described claw is moved, thereby from the curtain formula liquid film contact surface of described claw and near remove residue, and therefore can reduce curtain formula liquid film guide rail place, curtain limit to bias internal, described to bias internal be since residue on curtain formula liquid film contact surface and gathering in suction inlet cause; And wherein by removing remain on the described claw residue---it is removed from curtain formula liquid film contact surface, always can prevent curtain formula liquid film to bias internal.
As mentioned above, about curtain coating method of the present invention and curtain coating device, in order to stablize curtain formula liquid film, coating fluid is applied on the coiled material of continuous service, pours into auxiliary liquid from the surface of being arranged to contact with curtain formula liquid film the guide rail of curtain limit simultaneously.Auxiliary liquid is not subjected to concrete restriction, as long as it is in liquid form and has flowability.Under coating fluid was liquid, aqueous situation, preferably auxiliary liquid example comprised water, and by with water and mixed with resin or the solution by water and surfactant etc. is mixed with.Be in the situation of solvent shape liquid at coating fluid, preferably auxiliary liquid example comprises the solvent that is included in the coating fluid, and by with described solvent and mixed with resin or the solution by described solvent and surfactant etc. are mixed with.
As long as the auxiliary liquid that claw can flow down in curtain limit guide rail bottom support curtain formula liquid film and reception, the shape of described claw can be to determine arbitrarily.However, in general, claw is the form on plane.The material that is used for claw can be optional, unless its applied liquid and auxiliary corrosion.However, in general, described material is selected from stainless steel, brass, aluminium, iron, glass, PET etc.
With reference to the accompanying drawings, followingly explain in further detail the present invention's (curtain coating method and curtain coating device).
Because the embodiment that the following describes is to be fit to embodiments of the present invention, they are subject to technical preferred various restrictions.Should be noted that except as otherwise noted scope of the present invention is not restricted to these embodiments.
(the first embodiment)
The first embodiment of the present invention is wherein to use the claw of flat type to carry out the embodiment of curtain coating.
In this curtain coating method, shown in Fig. 5 A to Fig. 5 C, the claw 101 (claw that is configured to move around) that expectation is placed on guide rail 2 bottoms, curtain limit after using coating fluid, move around during the regular hour (with the direction of arrow B), or described claw 101 moves around when the coating of coating fluid begins constantly or moving around constantly during the regular hour after the coating fluid coating, thereby prevents that liquid residue from gathering at the curtain formula liquid film contact surface of described claw.Especially, applied when described coating fluid, when making simultaneously described claw 101 continue to move around, can further reduce curtain formula liquid film curtain limit guide rail 2 places to bias internal.Therefore, the curtain coating device is equipped with the function of the claw that moves around.Similarly, aspirate by using residue-vacuum unit (residue-sucking vacuum unit) (not shown) or analog, residue is removed.
The speed that claw 101 moves around 0.00005m/ second to the 0.005m/ scope of second.If described speed is less than 0.00005m/ second, then liquid residue gathers at the curtain formula liquid film contact surface of described claw, and therefore curtain formula liquid film to bias internal.If described speed is greater than 0.005m/ second, then curtain formula liquid film can not be supported by the edge of described claw, thereby described curtain formula liquid film is to bias internal.
(the second embodiment)
The second embodiment of the present invention is wherein to use discoid claw to carry out the embodiment of curtain coating.
Figure 10 A shows the situation of discoid claw 102 rotations.Figure 10 B shows the bottom that discoid claw 102 is placed on curtain limit guide rail 2.Pour into auxiliary liquid from the surface of being arranged to contact with coating fluid the curtain limit guide rail 2, and make it to flow through multihole device 13.
The claw 102 that expectation is positioned at guide rail 2 bottoms, curtain limit is rotating during the regular hour after the coating fluid coating, or claw 102 continues rotation during the regular hour when beginning from using coating fluid or after using coating fluid, thereby prevents that liquid residue from gathering at the curtain formula liquid film contact surface of claw.Especially, when coating fluid is applied when making simultaneously claw 102 continue rotation, can further reduce curtain formula liquid film curtain limit guide rail 2 places to bias internal.Therefore, the curtain coating device is equipped with the function that makes described claw rotation (it comprises makes described claw continue rotation).Similarly, aspirate by using residue-vacuum unit (not shown) or similar device, residue is removed.
The radius of discoid claw 102 is suitable in the scope of 10mm to 50mm.If it is very large that described radius, supports the claw curvature partly of curtain formula liquid film less than 10mm, so that curtain formula liquid film swings when coating, thereby coating width becomes unstable.If radius is greater than 50mm, then described device can not be made into compact.
Similarly, as the speed of rotation of the claw 102 of peripheral speed 0.0001m/ second to the 0.05m/ scope of second.If less than 0.0001m/ second, then liquid residue gathers at the curtain formula liquid film contact surface of described claw, thereby curtain formula liquid film is to bias internal as the speed of rotation of peripheral speed.If greater than 0.05m/ second, then curtain formula liquid film can not be supported by the edge of claw, thereby described curtain formula liquid film is to bias internal as the speed of rotation of peripheral speed.
(the third embodiment)
The third embodiment of the present invention is wherein to use the embodiment that carries out curtain coating with the claw of shape.
Figure 15 A shows banded claw 103 and is placed on guide rail 2 bottoms, curtain limit.Figure 15 B shows the situation (direction of arrow) that banded claw 103 moves in a direction.In Figure 15 B, numeral 14 expressions drive rubber rollers (one or more).
In this embodiment, banded claw 103 certain at least time durations after using coating fluid moves, thereby remove liquid residue from the curtain formula liquid film contact surface of described claw, and therefore can reduce curtain formula liquid film curtain limit guide rail 2 places to bias internal---it is caused by residue gathering on curtain formula liquid film contact surface.Similarly, can continue simultaneously mobile banded claw 103 in guide rail 2 bottoms, curtain limit by using coating fluid, further reduce curtain formula liquid film curtain limit guide rail 2 places to bias internal, thereby always prevent that liquid residue from gathering at curtain formula liquid film contact surface.Similarly, aspirate by using residue-vacuum unit (not shown) or similar device, residue is removed.Therefore, the curtain coating device is provided and makes the function that moves (it comprises lasting mobile claw) with the claw of shape.
The speed that banded claw 103 moves 0.00005m/ second to the 0.005m/ scope of second.If described speed is lower than 0.00005m/ second, then liquid residue gathers at the curtain formula liquid film contact surface of claw, so curtain formula liquid film is to bias internal.If described speed is higher than 0.005m/ second, then curtain formula liquid film can not be supported by the edge of claw, thereby curtain formula liquid film is to bias internal.
(the 4th kind of embodiment)
The 4th kind of embodiment of the present invention is wherein to use the claw 101 (claw that is configured to move around) with the edge that tilts with angle θ, and uses the discoid claw 102 with the edge (outer peripheral portion) that tilts with angle θ to carry out the embodiment of curtain coating.
Fig. 6 shows an edge of claw 101 wherein with the acclivitous situation of angle θ.Figure 11 shows the outer peripheral portion of claw 102 wherein with the acclivitous situation of angle θ.
When claw 101 and 102 have tilt with aforesaid angle θ the edge time, for some curtain formula liquid film, in the time of on being applied to coiled material, it becomes easier with separately contacting of claw, this be so that claw can support the edge (between claw and curtain formula liquid film contact area increase) of curtain formula liquid film to a greater degree, thus make further minimizing curtain formula liquid film---it is caused by the liquid residue on the curtain formula liquid film contact surface of staying claw---becomes possibility to bias internal.
Described angle θ is preferably in 0 ° to 45 ° scope, more preferably in 10 ° to 35 ° scope.As angle θ during less than 0 °, the edge of curtain formula liquid film can not fully be supported by claw separately, thereby when seldom measuring the curtain formula liquid film contact surface of residue at claw and deposit, curtain formula liquid film is to bias internal.As angle θ during greater than 45 °, coating fluid moves to the back side of claw 101 separately and 102 easily, and the amount of accompanying coating fluid becomes large with respect to the coating width direction in the edge of filming; Thereby, because drying is insufficient when producing, there is easily undried part, coating fluid may be attached on the feeding-in roll of coiled material in process of production, set-off coiled material film coated surface when product is wound, may stick together subsequently, and edge swell when being wound owing to product, described coiled material may be cut off.
(the 5th kind of embodiment)
The 5th kind of embodiment of the present invention is following embodiment, wherein uses the following curtain coating that carries out: the curtain limit guide rail 2 with magnetic material 15; Claw 101 (claw that is configured to move around), it is partly or entirely made by the material that the magnetic material 15 of magnetic material or curtain limit guide rail 2 attracts; With discoid claw 102, it is partly or entirely made by the material that the magnetic material 15 of magnetic material or curtain limit guide rail 2 attracts.
Fig. 7 A and 7B show separately, and using said structure that claw 101 is moved around with the direction of arrow B becomes possibility.Similarly, Figure 12 A and 12B show separately, use said structure to make claw 102 rotations become possibility.
Therefore, as shown in Fig. 7 B, claw 101 can easily slide so that the situation that the no liquid residue exists on the curtain formula liquid film contact surface of claw can easily realize, and can reduce curtain formula liquid film curtain limit guide rail 2 places to bias internal.Simultaneously, as shown in Figure 12B, discoid claw 102 can easily rotate so that the situation that the no liquid residue exists on the curtain formula liquid film contact surface of claw can easily realize, and therefore can reduce curtain formula liquid film curtain limit guide rail 2 places to bias internal.
The example of preferred magnetic material comprises magnetic iron ore, KS steel, MK steel, ferrite lattice, samarium-cobalt magnet, alnico magnet, neodymium magnet, samarium iron nitrogen magnet, platinum magnet, praseodymium magnet, plastic cement magnet, manganese aluminium magnet, iron-chromium-cobalt magnet, bonded permanent magnet and molecular magnet.The example of the material that preferred magnetic material 15 attracts comprises iron and stainless steel.
(the 6th kind of embodiment)
The 6th kind of embodiment of the present invention is that coating fluid (the curtain formula liquid film) contact surface that wherein uses hydrophobic elements to form claw carries out the embodiment of curtain coating.
Use hydrophobic elements claw can be repelled be included in water in coating fluid and the auxiliary liquid with coating fluid (the curtain formula liquid film) contact surface that forms claw, therefore can reduce liquid residue gathering on the curtain formula liquid film contact surface of claw, and prevent curtain formula liquid film to bias internal.The example of hydrophobic elements comprises resin such as Teflon (registration mark) and silicones.
(the 7th kind of embodiment)
The 7th kind of embodiment of the present invention is wherein to remove after the liquid residue that claw gathers or removing the embodiment that carries out curtain coating in the liquid residue that claw gathers.
Brush, doctor blade or analog are used to remove residue.Similarly, the residue-vacuum unit that is configured to the absorption of residual excess be provided at brush, doctor blade or analog near.
Fig. 8 A and 8B and Fig. 9 A and 9B show equipment separately, and described equipment is provided to remove the liquid residue of staying on the claw 101, and the curtain formula liquid film contact surface that is positioned at simultaneously the claw 101 of guide rail 2 bottoms, curtain limit moves around constantly.Fig. 8 A and 8B show that brush 16 is used to remove the figure of the example of liquid residue, and Fig. 9 A and Fig. 9 B show that doctor blade 18 is used to remove the figure of the example of liquid residue.In these figure, numeral 17 expressions are configured to the residue-vacuum unit (one or more) of absorption of residual excess.About above-mentioned, because residue is wiped by brush, doctor blade or analog and drawn (in the direction of arrow D) by vacuum unit 17, so thereby prevent that when producing continuously residue from gathering and prevent that curtain formula liquid film from being possible to bias internal at the liquid contact surface of claw.
Figure 13 A and 13B and Figure 14 A and 14B show equipment separately, it is provided to remove the liquid residue of staying on the discoid claw 102, simultaneously described claw 102 continues rotation, thereby so that when producing continuously, prevent residue the liquid contact surface of claw gather and thereby prevent curtain formula liquid film inwardly skew become possibility.Figure 13 A and 13B show that brush 16 is used to remove the figure of the example of liquid residue, and Figure 14 A and 14B show that doctor blade 18 is used to remove the figure of the example of liquid residue.
Simultaneously, Figure 16 A and 16B and Figure 17 A and 17B show equipment separately, it is provided to remove the liquid residue of staying on the banded claw 103, simultaneously described claw 103 moves in a direction, thereby so that when producing continuously, prevent residue gather at the liquid contact surface of claw (described residue is aspirated by vacuum unit 17 in the direction of arrow D) and thereby prevent curtain formula liquid film inwardly skew become possibility.Figure 16 A and 16B show that brush 16 is used to remove the figure of the example of liquid residue, and Figure 17 A and 17B show that doctor blade 18 is used to remove the figure of the example of liquid residue.
(the 8th kind of embodiment)
Curtain coating method and the curtain coating device of the 8th kind of embodiment of the present invention represent exemplarily that by Figure 19 A and 19B it is as follows: spray at least one deck coating fluid 12 from slit; And by curtain limit guide rail 2 coating fluid that sprays is freely fallen, described curtain limit guide rail 2 is with the form guiding coating fluid of curtain formula liquid film, thereby form curtain formula liquid film 19 and curtain formula liquid film 19 is applied on the coiled material 5 of continuous service, pour into auxiliary liquid from the whole surface of being arranged to contact with coating fluid the guide rail of curtain limit simultaneously, wherein make other auxiliary liquid flow as far as the claw surface the edge---here curtain formula liquid film 19 (coating fluid 12) begins to contact with the claw 21 that is arranged on guide rail 2 bottoms, curtain limit, thereby between claw 21 and coating fluid 12, form the liquid film 202 of described auxiliary liquid in addition, it is inhaled in the suction inlet 22, and the liquid residue that therefore can reduce on the liquid contact surface of claw forms.
The auxiliary liquid (hereinafter referred to as " curtain limit guide rail is assisted liquid ") that is poured into the surface on---this surface is configured to contact with coating fluid in the guide rail of curtain limit---can be identical or different with being poured into the lip-deep other auxiliary liquid (hereinafter referred to as " claw liquid contact surface is assisted liquid ") of the claw that contacts with coating fluid.
As long as described other auxiliary liquid is liquid form and has flowability that it is not particularly limited.Under coating fluid was liquid, aqueous situation, the example of described other auxiliary liquid comprised water, and by with water and mixed with resin or by water and surfactant etc. are mixed the solution for preparing.Be in the situation of solvent shape liquid at coating fluid, the example of auxiliary liquid comprises the solvent that is included in the coating fluid, and by with solvent with mixed with resin or by solvent and surfactant etc. being mixed the solution for preparing.Should be noted that in use and contain in the situation of solution of resin that the resin itself that is included in the auxiliary liquid of claw liquid contact surface may stay as residue, therefore the auxiliary liquid of described claw liquid contact surface preferably is different from the auxiliary liquid of curtain limit guide rail.Therefore, under coating fluid was liquid, aqueous situation, the auxiliary liquid of claw liquid contact surface is water preferably, or by water and surfactant etc. being mixed the solution for preparing.Be in the situation of solvent shape liquid at coating fluid, the auxiliary liquid of described claw liquid contact surface preferably is included in the solvent in the coating fluid, or by solvent and surfactant etc. are mixed the solution for preparing.
The instantiation of auxiliary liquid comprises water; The different methyl alcohol of alcohols such as methyl alcohol, ethanol, isopropyl alcohol, n-butanol and methyl (methylisocarbinol); Ketone such as acetone, 2-butanone, ethyl-n-amyl ketone, DAA, isophorone and cyclohexanone; Amide-type such as DMF and DMA (dimethylacetoamide); Ethers such as ether, isopropyl ether, oxolane, Isosorbide-5-Nitrae-dioxs and 3,4-dihydro-2H-pyrans; Glycol ether such as 2-methyl cellosolve, cellosolvo, butoxy ethanol and glycol dimethyl ether; Glycol ether acetate class such as 2-Methoxyethyl acetate, 2-ethoxyethyl acetate and acetic acid 2-butoxyethyl; Ester class such as methyl acetate, ethyl acetate, isobutyl acetate, pentyl acetate, ethyl lactate and ethylene carbonate; Arene such as benzene, toluene and dimethylbenzene; Aliphatic hydrocarbon such as hexane, heptane, isooctane and cyclohexane; Halogenated hydrocarbons such as carrene, 1,2-dichloroethanes, dichloropropane and chlorobenzene; Sulfoxide type such as methyl-sulfoxide; And pyrrolidones such as METHYLPYRROLIDONE and N-octyl group-2-Pyrrolidone.
The material that is used for claw 21 is not particularly limited, unless the applied liquid of this material and auxiliary corrosion, and described material can be selected arbitrarily.The example comprises stainless steel, brass, aluminium, iron, glass and PET.
About the shape of claw 21, as shown in Figure 20, the edge of claw 21 preferably tilts with angle 25 (θ).When described claw during with an overturning angle, it makes curtain formula liquid film 19 contact with claw and becomes easier, and the contact area between claw and curtain formula liquid film increases; Therefore, described claw supports the edge of curtain formula liquid film 19 with larger degree, and the inside skew that therefore reduces curtain formula liquid film becomes possibility.
The angle 25 of the edge tilt of claw 21 is preferably in 0 ° to 45 ° scope.When angle 25 during less than 0 °, can not between claw element and coating fluid to be inhaled into, form auxiliary liquid film, and the edge of curtain formula liquid film can not fully be supported by described claw, thus cause curtain formula liquid film when the deposition of gobbet residue very also to bias internal.When angle 25 during greater than 45 °, coating fluid moves to the back side of claw easily, and therefore the amount of accompanying coating fluid becomes large with respect to the coating width direction in the edge of filming, and the described fully drying of filming when producing.Because the not existence of drying nest, coating fluid may be attached on the feeding-in roll of coiled material, and the film coated surface of the described coiled material of set-off when product is wound, may stick together subsequently, and because the edge swell of product when being wound, described coiled material may be cut off.
The edge thickness 26 of claw 21 is preferably 0.4mm or following.When thickness 26 during greater than 0.4mm, can not between claw element and coating fluid, form auxiliary liquid film, thereby liquid residue is attached on the liquid contact surface of claw edge, cause curtain formula liquid film to bias internal.
Auxiliary liquid is supplied with claw and its example that is poured into the unit on described claw surface and method is as follows.
(1) unit and method will assist liquid to be poured on the surface of claw 21, as shown in Figure 21 from the edge by using pour tube 27.(2) unit and method, by use pour tube 27 or similar device will assist liquid be fed to claw 21 the edge and with described auxiliary liquid from described edge (for example, by the inside of described claw) pour into, as shown in Figure 22.(3) unit and method, by using the auxiliary liquid of pour tube 27 or similar device supply and making described auxiliary liquid flow on the whole surface of described claw 21 and make it flow to edge as far as described claw, the surface of wherein said claw---it contacts with coating fluid---is made by mesh element, multihole device etc., as shown in Figure 23.
The application of any these unit and method makes auxiliary liquid (claw liquid-contact surface is assisted liquid 202) flow on the claw surface that contacts with coating fluid becomes possibility, and thereby makes it possible to reduce the formation of described liquid residue.
(the 9th kind of embodiment)
The 9th kind of embodiment of the present invention is such embodiment, the claw 21 that wherein is placed on guide rail 2 bottoms, curtain limit have demonstrate Superhydrophilic super hydrophilic membrane 28 as its surface, as shown in Figure 24.
By the surface at described claw---namely, the claw that contacts with coating fluid surface---on super hydrophilic membrane is provided, to form liquid film with the absorbed coating fluid of auxiliary liquid surface, and this liquid film becomes possibility so that reduce the formation of described liquid residue.
The example that forms the method for super hydrophilic membrane comprises the method that is coated with the claw surface with the composition that comprises super water wetted material, and the method that the claw surface attachment is comprised film or the thin slice of super water wetted material.
The example of super water wetted material comprises photochemical catalyst.Photochemical catalyst is such material, wherein having above band-gap energy when described material absorbs---it is the energy difference between being with of material crystals, namely, energy difference between its valence band upper limit and its conduction band lower limit---light time of energy, photostimulation occurs, wherein the electronics in the valence band is excited in the conduction band, and these electronics and induced light-catalyzed reaction owing to lack the electron hole that electronics stays in valence band.The example of photochemical catalyst comprises titanium dioxide, zinc oxide, tin oxide, iron oxide and bismuth oxide.Among these photochemical catalysts, preferred titanium dioxide is because it has improved hydrophily by light absorption and has been good in wetability therefore.
(the tenth kind of embodiment)
The of the present invention ten embodiment is such embodiment, and wherein light irradiation apparatus 29 is provided so that with the surface of exciting light irradiation claw 21, as shown in Figure 25.
By using the surface of shining constantly claw 21 from the exciting light of light irradiation apparatus 29, can keep the excitation state of the surface light catalyst that is provided for claw 21, and therefore reduced the formation of liquid residue.
As long as exciting light can the exciting light catalyst, it is not limited especially.For example, preferably, use ultraviolet ray for this reason.The example that is configured to use ultraviolet light irradiation apparatus comprises the light illuminating unit of introducing light source such as bactericidal lamp, black light lamp, xenon lamp, metal halide lamp and mercury vapor lamp.Utilize the irradiation of exciting light to make it possible to easily keep the excitation state of photochemical catalyst.
(the 11 embodiment)
The 11 embodiment of the present invention is such embodiment, and wherein ultraviolet (uv) transmission element 31 is used to consist of the claw 21 that is placed on guide rail 2 bottoms, curtain limit, and described claw has super hydrophilic membrane 28 as its surface, as shown in Figure 26.
Using the ultraviolet (uv) transmission element consists of claw and makes it possible to use from the ultraviolet ray at the coating fluid contact surface back side of described claw and shine constantly the super hydrophilic membrane that contains photochemical catalyst, and thereby keep the excitation state of photochemical catalyst, thereby even when long-term continuously coating, reduced the formation of liquid residue.
The example of ultraviolet (uv) transmission element comprises glass, acrylic resin and polyethylene film.
(the 12 kind of embodiment)
The 12 kind of embodiment of the present invention is such embodiment, the claw 21 that wherein is placed on guide rail 2 bottoms, curtain limit is discoid and can rotates, described claw 21 have contain photochemical catalyst super hydrophilic membrane as its surface, and described light irradiation apparatus 29 is provided, as shown in Figure 27 (A) and 27 (B).
By ultraviolet ray being applied to the surface of the discoid claw 21 that contains photochemical catalyst---except the surface of its contact coating fluid, claw 21 excitation state that continued rotation, can keep to contain photocatalyst surface and thereby even when long-term continuously coating, reduced the formation of liquid residue simultaneously.
The radius of discoid claw 21 is preferably in the scope of 10mm to 50mm.If it is very large that described radius, then supports the curvature of claw part of curtain formula liquid film less than 10mm so that curtain formula liquid film waves when being coated with, and thereby coating width become unstable.If described radius about 50mm, then described device can not be made compact.
The speed of rotation as the claw 21 of peripheral speed is preferably more than 0m/sec and is less than or equal to 0.05m/sec.If the speed of rotation as peripheral speed is 0m/sec, then the coating fluid contact surface of described claw can not fully shine with ultraviolet ray, thereby has shortened the time span that may continue to be coated with.If greater than 0.05m/sec, then curtain formula liquid film can not be supported by the edge of described claw as the speed of rotation of peripheral speed, and described curtain formula liquid film thereby to bias internal.
(the 13 kind of embodiment)
The 13 kind of embodiment of the present invention is such embodiment, the claw 21 that wherein is placed on guide rail 2 bottoms, curtain limit can move around, described claw 21 have contain photochemical catalyst super hydrophilic membrane as its surface, and described light irradiation apparatus 29 is provided, as shown in Figure 28 A and 28B.Drive rubber rollers 32 be provided at the top of claw 21 and below.
By ultraviolet ray being applied to the surface of the claw 21 that contains photochemical catalyst---except the surface of its contact coating fluid, simultaneously claw 21 is moved around constantly, can keep the excitation state that contains photocatalyst surface and thereby even reduce the formation of liquid residue when long-term continuously coating.
The speed that claw 21 moves around is preferably more than 0m/sec and is less than or equal to 0.005m/sec.If described speed is 0m/sec, then the coating fluid contact surface of described claw can not fully shine with ultraviolet ray, thereby has shortened the time span that may continue to be coated with.If described speed is greater than 0.005m/sec, then curtain formula liquid film can not be supported by the edge of described claw, and described curtain formula liquid film thereby to bias internal.
(the 14 kind of embodiment)
The 14 kind of embodiment of the present invention is such embodiment, the claw 21 that wherein is placed on guide rail 2 bottoms, curtain limit is band shape, and can continue mobile, described claw 21 have contain photochemical catalyst super hydrophilic membrane as its surface, and described light irradiation apparatus 29 is provided, as shown in Figure 29 A and 29B.Drive the place, two ends, inside that rubber rollers 32 is provided at banded claw 21.
By ultraviolet ray being applied to the surface of the banded claw 21 that contains photochemical catalyst---except the surface of its contact coating fluid, simultaneously claw 21 is continued mobilely, can keep the excitation state that contains photocatalyst surface and thereby even reduce the formation of liquid residue when long-term continuously coating.
The speed that claw 21 moves around is preferably more than 0m/sec and is less than or equal to 0.005m/sec.If described speed is 0m/sec, then the coating fluid contact surface of described claw can not fully shine with ultraviolet ray, thereby has shortened the time span that may continue to be coated with.If described speed is greater than 0.005m/sec, then curtain formula liquid film can not be supported by the edge of described claw, and described curtain formula liquid film thereby to bias internal.
Embodiment
Reference example and comparing embodiment, the below explains the present invention in further detail.Yet, should note the invention is not restricted to these embodiment and comparing embodiment.The term that the below uses " by mass umber of umber (a or many parts) expression (a or many parts).
About these embodiment, embodiment 1,2 and 19 relate to above mentioned the second embodiment of the present invention, embodiment 3 relates to above mentioned the third embodiment of the present invention, embodiment 4 relates to above mentioned the third embodiment of the present invention, embodiment 5 to 12 relates to above mentioned the 4th kind of embodiment of the present invention, embodiment 13 and 14 relates to above mentioned the 5th kind of embodiment of the present invention, embodiment 15 to 17 relates to above mentioned the 6th kind of embodiment of the present invention, embodiment 18 and 20 to 26 relates to above mentioned the 7th kind of embodiment of the present invention, embodiment 27 to 33 relates to above mentioned the 8th kind of embodiment of the present invention, embodiment 34 relates to above mentioned the 9th kind of embodiment of the present invention, embodiment 35 relates to above mentioned the of the present invention ten kind of embodiment, embodiment 36 and 37 relates to above mentioned the 11 kind of embodiment of the present invention, embodiment 38 and 39 relates to above mentioned the 12 kind of embodiment of the present invention, embodiment 40 and 41 relates to above mentioned the 13 kind of embodiment of the present invention, and embodiment 42 and 43 relates to above mentioned the 14 kind of embodiment of the present invention.
[embodiment 1]
Slide the shown in figure 2 curtain limit guide rail bottom of curtain coating device, the discoid claw 102 shown in installation diagram 10A and the 10B rotatably, mandrel is fixed on the center of described claw simultaneously.Then, according to the heat sensitive recording layer coating fluid of following prescription preparation be applied to coiled material (paper) above, coating speed is 400m/min, coating width is that the flow velocity (spraying from nozzle slot) of 250mm and coating fluid is 3,000 g/min.At this moment, discoid claw is made by stainless steel, and has the radius of 20mm and the thickness of 0.18mm, and the amount of the auxiliary liquid (water) that flows along curtain limit guide rail is 30cc/min, and the swabbing pressure that is used for reclaiming the vacuum unit of auxiliary liquid is-8kpa.Similarly, make claw 102 and give prominence to 2mm with the curtain formula liquid film contact surface from multihole device 13 (it is made by pottery, and has the average pore size of 50 μ m and 52% porosity).The results are shown among the table 1-A.
(heat sensitive recording layer coating fluid: viscosity 150mPas, static surface tension 38mN/m)
Adopt automatic surface tensiometer CBVP-A3 (by Kyowa Interface Science Co., Ltd. makes) to measure static surface tension.
● 4 parts of 3-dibutylaminos-6-methyl-7-anilino fluorane (anilinofluoran)
● 12 parts of 4-isopropyls-4 '-hydroxy diphenyl sulfone (hydroxydiphenylsulfone)
● 6 parts of silica
● 16 parts of 10% polyvinyl alcohol water solutions
● 41 parts in water
[embodiment 2]
Except the radius with discoid claw 102 becomes 5mm from 20mm, with embodiment 1 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-A.
[embodiment 3]
Except using the slip curtain coating device shown in Fig. 5 A to 5C---wherein, (it is made by stainless steel the claw 101 of flat type, and thickness is 0.18mm, length about its moving direction is 60mm, width is 30mm) be sandwiched in and drive between the rubber rollers 14 and be configured to move around (with the speed of 0.005m/sec)---outside, with embodiment 1 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-A.
[embodiment 4]
Except using the slip curtain coating device shown in Figure 15 A to 15C---wherein, (it is made by stainless steel banded claw 103, and thickness is 0.01mm, length about its moving direction is 80mm, width is 30mm) support and be configured to mobile (with the speed of 0.005m/sec) by driving rubber rollers 14---outside, with embodiment 1 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-A.
[embodiment 5]
Except the outer peripheral portion of discoid claw 102 as shown in figure 11 with 30 ° of overturning angles, with embodiment 1 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-A.
[embodiment 6]
Except the outer peripheral portion of discoid claw 102 tilts with 45° angle as shown in figure 11, with embodiment 1 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-A.
[embodiment 7]
Except the outer peripheral portion of discoid claw 102 as shown in figure 11 with 50 ° of overturning angles, with embodiment 1 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-A.
[embodiment 8]
Except the outer peripheral portion of discoid claw 102 as shown in figure 11 with 5 ° of overturning angles, with embodiment 1 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-A.
[embodiment 9]
Except an edge of the claw 101 of flat type as shown in Figure 6 with 30 ° of overturning angles, with embodiment 3 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-A.
[embodiment 10]
Except an edge of the claw 101 of flat type tilts with 45° angle as shown in Figure 6, with embodiment 3 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-A.
[embodiment 11]
Except an edge of the claw 101 of flat type as shown in Figure 6 with 50 ° of overturning angles, with embodiment 3 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-A.
[embodiment 12]
Except an edge of the claw 101 of flat type as shown in Figure 6 with 5 ° of overturning angles, with embodiment 3 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-A.
[embodiment 13]
Except using the slip curtain coating device shown in Figure 12 A and the 12B---wherein, magnetic element (magnet) 15 is attached on the curtain limit guide rail 2, discoid claw 102 (radius is that 20mm and thickness are 0.18mm) is made by the stainless steel (SUS 420) that magnetic element (magnet) 15 attracts, and the speed of rotation as the claw of peripheral speed is 0.01m/sec---outside, with embodiment 1 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-A.
[embodiment 14]
Except using the slip curtain coating device shown in Fig. 7 A and the 7B---wherein, magnetic element (magnet) 15 is attached on the curtain limit guide rail 2, (thickness is 0.18mm to the claw 101 of flat type, length about its moving direction is that 60mm and width are 30mm) stainless steel (SUS 420) that attracted by magnetic element (magnet) 15 makes, and the speed that claw moves around is 0.005m/sec---outside, with embodiment 1 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-A.
[embodiment 15]
Except Teflon (registration mark) sheet with 100 μ m thickness is attached on coating fluid (the curtain formula liquid film) contact surface of discoid claw 102, with embodiment 1 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-A.
[embodiment 16]
Except Teflon (registration mark) sheet with 100 μ m thickness is attached on coating fluid (the curtain formula liquid film) contact surface of the claw 101 of flat type, with embodiment 3 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-B.
[embodiment 17]
Except Teflon (registration mark) sheet with 100 μ m thickness is attached on coating fluid (the curtain formula liquid film) contact surface of banded claw 103, with embodiment 4 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-B.
[embodiment 18]
Except using the slip curtain coating device shown in Figure 13 A and the 13B---wherein, discoid claw 102 is configured to by the peripheral speed rotation of CD-ROM drive motor with 0.0001m/sec, round-type brush 16 is installed in the opposite of curtain limit guide rail 2 and continues rotation (with the peripheral speed of 0.05m/sec), thereby opposite with the direction of rotation of discoid claw 102, and will remain in liquid residue on the discoid claw by residue-vacuum unit 17 and absorb (under the swabbing pressure of-0.01MPa), with embodiment 1 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-B.
[embodiment 19]
Except the peripheral speed with discoid claw 102 becomes 0.1m/sec, with embodiment 18 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-B.
[embodiment 20]
Use the slip curtain coating device shown in Figure 14 A to 14C, wherein discoid claw 102 is---identical with the discoid claw among the embodiment 1---is configured to by the peripheral speed rotation of CD-ROM drive motor with 0.0001m/sec, the opposite that doctor blade 18 (it is 0.4mm by polyethylene manufacturing and thickness) is installed in curtain limit guide rail 2 in the mode that tilts is so that opposite with the direction of rotation of discoid claw 102, and will remain in liquid residue suction on the discoid claw (under the suction pressure of-0.01MPa) by residue-vacuum unit 17.The results are shown among the table 1-B.
[embodiment 21]
Use the slip curtain coating device shown in Fig. 8 A and the 8B, the length (with regard to its moving direction) that wherein claw 101 of flat type is---identical with the claw among the embodiment 1---is increased to 100mm, claw 101 is sandwiched in and drives between the rubber rollers 14, thereby driving rubber rollers 14 makes claw 101 move around with the speed of controlled mode with 0.0005m/sec by the CD-ROM drive motor rotation, round-type brush 16 is at curtain limit guide rail 2 and drive lasting rotation (with the peripheral speed of 0.05m/sec) between the rubber rollers 14, thereby opposite with the moving direction of described claw, and will remain in liquid residue suction on the described claw (under the suction pressure of-0.01MPa) by residue-vacuum unit 17.The results are shown among the table 1-B.
[embodiment 22]
Except claw 101 being configured to move around with the speed of 0.01m/sec in controlled mode, with embodiment 21 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-B.
[embodiment 23]
Use the slip curtain coating device shown in Fig. 9 A and the 9B, the length (with regard to its moving direction) that wherein claw 101 of flat type is---identical with the claw among the embodiment 3---is increased to 100mm, claw 101 is sandwiched in and drives between the rubber rollers 14, driving rubber rollers 14 rotates in order to claw 101 is moved around with the speed of controlled mode with 0.00005m/sec by CD-ROM drive motor, doctor blade 18 (it is 0.4mm by polyethylene manufacturing and each thickness) is installed in curtain limit guide rail in the mode that tilts and drives between the rubber rollers, so that opposite with the moving direction of described claw, and will remain in liquid residue suction on the described claw (under the suction pressure of-0.01MPa) by residue-vacuum unit 17.The results are shown among the table 1-B.
[embodiment 24]
Use the slip curtain coating device shown in Figure 16 A and the 16B, wherein banded claw 103-is identical with the claw of embodiment 4---support by driving rubber rollers 14, thereby driving rubber rollers 14 makes claw 103 move in the speed of a direction with 0.00005m/sec by the CD-ROM drive motor rotation, round-type brush 16 continues rotation (with the peripheral speed of 0.05m/sec), so that opposite with the moving direction of described claw 103, and will remain in liquid residue suction on the claw (under the suction pressure of-0.01MPa) by residue-vacuum unit 17.The results are shown among the table 1-B.
[embodiment 25]
Except the speed that claw 103 is moved becomes the 0.01m/sec, with embodiment 24 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown among the table 1-B.
[embodiment 26]
Use the slip curtain coating device shown in Figure 17 A and the 17B, wherein banded claw 103-is identical with the claw of embodiment 4---support by driving rubber rollers 14, thereby driving rubber rollers 14 makes claw 103 move in the speed of a direction with 0.00005m/sec by the CD-ROM drive motor rotation, doctor blade 18 (it is made by polyethylene and thickness is 0.4mm) is installed in the mode that tilts, so that opposite with the moving direction of liquid residue on the described claw, and described residue is aspirated (under the suction pressure of-0.01MPa) by vacuum unit 17.The results are shown among the table 1-B.
[comparing embodiment 1]
As shown in Figure 2, the guide rail bottom, curtain limit of slip curtain coating device is fixed, and is coated with such as embodiment 1.The results are shown among the table 1-B.
[comparing embodiment 2]
Except claw is configured to not rotate, use mode as in Example 1 to be coated with.The results are shown among the table 1-B.
[comparing embodiment 3]
Except claw is configured to not move around, use mode as in Example 3 to be coated with.The results are shown among the table 1-B.
[comparing embodiment 4]
Except claw is configured to not move, use mode as in Example 4 to be coated with.The results are shown among the table 1-B.
Table 1-A
Sample The result
Embodiment
1 Although residue is attached on the claw, can pass through to rotate claw 1 time in per 1.5 hours, remove described residue from described claw, thereby curtain formula liquid film is not to bias internal.Can constantly prevent its existence by the residue of removing on the described claw liquid contact surface.
Embodiment 2 The very large so that curtain formula liquid film of the curvature of the arc of claw can not stably be supported, thereby described curtain formula liquid film is to bias internal.
Embodiment 3 Although residue is attached on the claw, can by per 1.5 hours mobile claws 1 time, remove described residue from described claw, thereby curtain formula liquid film be to bias internal.Can constantly prevent its existence by the residue of removing on the described claw liquid contact surface.
Embodiment 4 Although residue is attached on the claw, can by per 1.5 hours mobile claws 1 time, remove described residue from described claw, thereby curtain formula liquid film be to bias internal.Can constantly prevent its existence by the residue of removing on the described claw liquid contact surface.
Embodiment 5 Although residue is attached on the claw, can pass through to rotate claw 1 time in per 1.5 hours, remove described residue from described claw, thereby curtain formula liquid film is not to bias internal.Can prevent its existence by the residue on the described claw liquid of the continuous removing contact surface.
Embodiment 6 Although residue is attached on the claw, can pass through to rotate claw 1 time in per 1.5 hours, remove described residue from described claw, thereby curtain formula liquid film is not to bias internal.Can prevent its existence by the residue on the described claw liquid of the continuous removing contact surface.
Embodiment 7 Residue also is attached to the back of claw, and curtain formula liquid film swings at width, so curtain formula liquid film can not stably be supported, thereby curtain formula liquid film is to bias internal.
Embodiment 8 Curtain formula liquid film be difficult to support and after beginning immediately to bias internal.
Embodiment 9 Although residue is attached on the claw, can by per 1.5 hours mobile claws 1 time, remove described residue from described claw, thereby curtain formula liquid film be to bias internal.Can constantly prevent its existence by removing the residue on the described claw liquid contact surface.
Embodiment 10 Although residue is attached on the claw, can by per 1.5 hours mobile claws 1 time, remove described residue punching from described claw, thereby curtain formula liquid film be to bias internal.Can constantly prevent its existence by the residue of removing on the described claw liquid contact surface.
Embodiment 11 Residue also is attached to the back side of claw, and curtain formula liquid film swings at width, so curtain formula liquid film can not stably be supported, thereby curtain formula liquid film is to bias internal.
Embodiment 12 Curtain formula liquid film be difficult to support and after beginning immediately to bias internal.
Embodiment 13 Although residue is attached on the claw, can pass through to rotate claw 1 time in per 1.5 hours, remove described residue from described claw, thereby curtain formula liquid film is not to bias internal.Can constantly prevent its existence by removing the residue on the described claw liquid contact surface.And discoid claw is easy to fix, and described curtain formula liquid film is stable.
Embodiment 14 Although residue is attached on the claw, can by per 1.5 hours mobile claws 1 time, remove described residue from described claw, thereby curtain formula liquid film be to bias internal.Can constantly prevent its existence by removing the residue on the described claw liquid contact surface.And discoid claw is easy to fix, and described curtain formula liquid film is stable.
Embodiment 15 Although residue is attached on the claw, can pass through to rotate claw 1 time in per 24 hours, remove described residue from described claw, thereby curtain formula liquid film is not to bias internal.Can constantly prevent its existence by removing the residue on the described claw liquid contact surface.
[0274]Table 1-B
Sample The result
Embodiment
16 Although residue is attached on the claw, can by per 24 hours mobile claws 1 time, remove described residue from described claw, thereby curtain formula liquid film be to bias internal.Can constantly prevent its existence by removing the residue on the described claw liquid contact surface.
Embodiment 17 Although residue is attached on the claw, can by per 24 hours mobile claws 1 time, remove described residue from described claw, thereby curtain formula liquid film be to bias internal.Can constantly prevent its existence by removing the residue on the described claw liquid contact surface.
Embodiment 18 Although residue is attached on the claw, can by continuing the rotation claw, remove described residue from described claw, thereby curtain formula liquid film be to bias internal.
Embodiment 19 The peripheral speed of discoid claw is so high, so that curtain formula liquid film can not be supported thereby to bias internal.
Embodiment 20 Although residue is attached on the claw, can by continuing the rotation claw, constantly remove described residue from described claw, thereby curtain formula liquid film be to bias internal.
Embodiment 21 Although residue is attached on the claw, can constantly remove described residue from described claw by the claw that moves around constantly, thereby curtain formula liquid film is not to bias internal.
Embodiment 22 The speed that claw moves (speed) is so high, so that curtain formula liquid film can not be supported thereby to bias internal.
Embodiment 23 Although residue is attached on the claw, can constantly remove described residue from described claw by the claw that moves around constantly, thereby curtain formula liquid film is not to bias internal.
Embodiment 24 Although residue is attached on the claw, can pass through constantly mobile claw, constantly remove described residue from described claw, thereby curtain formula liquid film is not to bias internal.
Embodiment 25 The speed that claw moves (speed) is so high, so that curtain formula liquid film can not be supported thereby to bias internal.
Embodiment 26 Although residue is attached on the claw, can pass through constantly mobile claw, constantly remove described residue from described claw, thereby curtain formula liquid film is not to bias internal.
Comparing embodiment 1 Residue is attached on the claw, curtain formula liquid film rear 1.5 hours of beginning to bias internal.
Comparing embodiment 2 Residue is attached on the claw, curtain formula liquid film rear 1.5 hours of beginning to bias internal.
Comparing embodiment 3 Residue is attached on the claw, curtain formula liquid film rear 1.5 hours of beginning to bias internal.
Comparing embodiment 4 Residue is attached on the claw, curtain formula liquid film rear 1.5 hours of beginning to bias internal.
[embodiment 27]
Use comprises following device: the slip curtain coating device shown in Fig. 2, the claw 21 of the guide rail bottom, curtain limit that is provided at slip curtain coating device shown in Figure 19 A and the 19B, and be shown in two pour tubes 27 among Figure 21, it is possible wherein making auxiliary liquid flow to as far as the edge of described claw.Water is used as auxiliary liquid.
Heat sensitive recording layer coating fluid according to following prescription preparation is coated on the coiled material (paper), and coating speed is 400m/min, and coating width is 250mm, and the flow velocity of coating fluid (from the nozzle slot ejection) is 3,000g/min.
At this moment, the amount of the auxiliary liquid (water) on the liquid contact surface of claw (amount of the auxiliary liquid 202 of claw liquid contact surface) is 120cc/min (each 60cc/min), amount (amount of the auxiliary liquid 201 of curtain limit guide rail) along the mobile auxiliary liquid (water) of curtain limit guide rail is 30cc/min, and for the swabbing pressure of the vacuum unit that reclaims auxiliary liquid is-20kpa.Equally, claw is manufactured to from the outstanding 2mm of the curtain formula liquid film contact surface of multihole device.Further, the thickness at claw edge---it is by numeral 26 expressions of Figure 20---is 0.1mm, and the angle θ of claw edge tilt---it is by numeral 25 expressions among Figure 20---is 30 °.The results are shown in the table 2.
(heat sensitive recording layer coating fluid: viscosity 150mPas, static surface tension 38mN/m)
Adopt automatic surface tensiometer CBVP-A3 (by Kyowa Interface Science Co., Ltd. makes) to measure static surface tension.
● 4 parts of 3-dibutylaminos-6-methyl-7-anilino fluorane (anilinofluoran)
● 12 parts of 4-isopropyls-4 '-hydroxy diphenyl sulfone (hydroxydiphenylsulfone)
● 6 parts of silica
● 16 parts of 10% polyvinyl alcohol water solutions
● 41 parts in water
[embodiment 28]
Except the angle of the edge tilt of claw 21 is changed to 0 °, use with embodiment 27 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[embodiment 29]
Except the angle of the edge tilt of claw 21 is changed to 45 °, use with embodiment 27 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[reference example 1]
Except the angle of the edge tilt of claw 21 is changed to 50 °, use with embodiment 27 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[reference example 2]
Except the angle of the edge tilt of claw 21 is changed to-5 °, use with embodiment 27 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[embodiment 30]
Except the thickness at the edge of claw 21 is changed to the 0.4mm, use with embodiment 27 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[reference example 3]
Except the thickness at the edge of claw 21 is changed to the 0.5mm, use with embodiment 27 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[embodiment 31]
Except pouring into as shown in Figure 22 auxiliary liquid (water) so that the amount of the auxiliary liquid (water) on the liquid contact surface of claw 21 (amount of the auxiliary liquid 202 of claw liquid contact surface) for the 100cc/min, use with embodiment 27 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[embodiment 32]
Except claw surface 24 is formed by stainless (steel) wire, and pour into as shown in Figure 23 auxiliary liquid (water) so that the amount (amount of the auxiliary liquid 202 of claw liquid contact surface) that flow to the auxiliary liquid (water) on the liquid contact surface of claw 21 for outside the 100cc/min, use with embodiment 27 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[embodiment 33]
Except claw surface 24 is formed by multihole device, and pour into as shown in Figure 23 auxiliary liquid (water) so that the amount (amount of the auxiliary liquid 202 of claw liquid contact surface) that flow to the auxiliary liquid (water) on the liquid contact surface of claw 21 for outside the 100cc/min, use with embodiment 27 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[embodiment 34]
Except photocatalyst sheet (HYDROTECTFILM as shown in Figure 24, produced by TOTO LTD.) be fixed to outside the surface (coating fluid contact surface) of claw 21 as super hydrophilic membrane 28, use with embodiment 27 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[embodiment 35]
Except using as shown in Figure 25 black light lamp as light irradiation apparatus 29, outside the surface (coating fluid contact surface) with ultraviolet ray irradiation claw 21, use with embodiment 34 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[embodiment 36]
Except using as shown in Figure 26 ultraviolet lamp (TBB-30, made by HYBEC CORPORARION)---it has the length of the pipe diameter of 3mm and 30mm and serves as light irradiation apparatus 29, utilize ultraviolet ray, from the surface irradiation claw 21 opposite with the coating fluid contact surface area---it is by will be as the photocatalyst sheet (HYDROTECTFILM of super hydrophilic membrane 28, produced by TOTO LTD.) be fixed in the surface of the PET film (thickness 0.2mm) as ultraviolet (uv) transmission element 31 and form---outside, use with embodiment 27 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[embodiment 37]
Except need not ultraviolet ray irradiation claw, use with embodiment 36 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[embodiment 38]
Except as shown in Figure 27 A and 27B, (it is made by stainless steel claw 21 for discoid claw, and radius is 20mm, thickness is 0.18mm), photocatalyst sheet (HYDROTECTFILM, produced by TOTO LTD.) be fixed to the coating fluid contact surface of claw 21 as super hydrophilic membrane 28, described claw 21 is by the peripheral speed rotation of CD-ROM drive motor with 0.0001m/sec, and use black light lamp as light irradiation apparatus 29 usefulness ultraviolet ray shine outside the surface of claw 21, use with embodiment 27 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[embodiment 39]
Except discoid claw 21 does not rotate, use with embodiment 38 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[reference example 4]
Except the peripheral speed of claw 21 is changed to the 0.1m/sec, use with embodiment 38 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[embodiment 40]
Except as shown in Figure 28 A and 28B, length about the claw 21 of its moving direction is changed to 1,000mm, the width of claw 21 is changed to 30mm, photocatalyst sheet (HYDROTECTFILM, produced by TOTO LTD.) as the be fixed coating fluid contact surface of described claw of super hydrophilic membrane 28, claw with super hydrophilic membrane is sandwiched in and drives between the rubber rollers 32 and be configured to move around with the speed of controlled mode with 0.00005m/sec by motor, and use black light lamp as light irradiation apparatus 29 usefulness ultraviolet ray shine outside the super hydrophilic membrane 28, use with embodiment 27 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[embodiment 41]
Except claw 21 is not configured to move around, use with embodiment 40 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[reference example 5]
The speed that moves around except claw 21 is changed to the 0.01m/sec, use with embodiment 40 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[embodiment 42]
Except as shown in Figure 29 A and 29B, claw 21 is made by stainless steel and (its length with regard to its moving direction is 800mm for band shape, width is that 30mm and thickness are 0.01mm), photocatalyst sheet (HYDROTECTFILM, produced by TOTO LTD) as the be fixed coating fluid contact surface of described claw of super hydrophilic membrane 28, the driven rubber rollers 32 of claw with super hydrophilic membrane supports and is configured to and moves by the speed of use CD-ROM drive motor with 0.00005m/sec, and use black light lamp as light irradiation apparatus 29 usefulness ultraviolet ray shine outside the super hydrophilic membrane 28, use with embodiment 27 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[embodiment 43]
Except claw 21 is mobile, use with embodiment 42 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
[reference example 6]
The speed that moves except claw 21 is changed to the 0.1m/sec, use with embodiment 42 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
(comparing embodiment 1)
Except auxiliary liquid is not poured on the coating fluid contact surface of claw 21, use with embodiment 27 in identical mode the heat sensitive recording layer coating fluid is applied on the coiled material.The results are shown in the table 2.
Table 2
Figure G2009101516914D00271

Claims (9)

1. curtain coating device comprises:
Slit, at least one deck coating fluid from wherein the ejection,
Curtain limit guide rail, it is configured to guide the coating fluid that is sprayed with the form of curtain formula liquid film, and described coating fluid is freely fallen, pour into auxiliary liquid from the whole surface of being arranged to contact with described coating fluid the guide rail of described curtain limit simultaneously, thereby described coating fluid is applied on the coiled material of continuous service, and
Claw, it is at the described curtain formula of described curtain limit guide rail bottom support liquid film,
Wherein said claw be discoid claw and be configured to the rotation, and
The radius of wherein said discoid claw is in the scope of 10mm to 50mm.
2. curtain coating device according to claim 1, wherein said curtain coating device further comprises the CD-ROM drive motor that is configured to rotate described discoid claw.
3. curtain coating device according to claim 1, the edge of wherein said claw tilts with an angle.
4. curtain coating device according to claim 3, wherein said angle is in 0 ° to 45 ° scope.
5. curtain coating device according to claim 1, wherein said curtain limit guide rail is provided with magnetic material, and partly or entirely being made by magnetic material or being made by the material that is attracted by the magnetic material of described curtain limit guide rail of described claw.
6. curtain coating device according to claim 1, wherein said claw has the coating fluid contact surface that is formed by hydrophobic elements.
7. curtain coating device according to claim 1 further comprises being configured to remove the unit that accumulates in the liquid residue on the described claw.
8. curtain coating device according to claim 2, wherein said claw are configured to rotation during at least one the fixing time after described coating fluid being applied on the described coiled material.
9. curtain coating device according to claim 1, the curtain formula liquid film contact surface of wherein said claw is formed by the super hydrophilic membrane that comprises super water wetted material.
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