JP4760265B2 - Application method - Google Patents

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JP4760265B2
JP4760265B2 JP2005281641A JP2005281641A JP4760265B2 JP 4760265 B2 JP4760265 B2 JP 4760265B2 JP 2005281641 A JP2005281641 A JP 2005281641A JP 2005281641 A JP2005281641 A JP 2005281641A JP 4760265 B2 JP4760265 B2 JP 4760265B2
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coating
discharge port
coating film
coating liquid
film
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JP2007090205A (en
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孝雄 黒宮
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Description

本発明は、板状体又は可撓性の帯状体からなる被塗布物の表面に塗膜を形成するための塗布方法、具体的には、上層及び下層の少なくとも2層の塗膜を積層した積層部と上層塗膜のみからなる一層部とを被塗布物の表面に交互に形成するための塗布方法に関するものである。   The present invention relates to a coating method for forming a coating film on the surface of an object to be coated consisting of a plate-like body or a flexible belt-like body, specifically, a laminate of at least two layers of an upper layer and a lower layer. The present invention relates to a coating method for alternately forming a layered portion and a single layer portion consisting only of an upper coating film on the surface of an object to be coated.

従来、板状体又は可撓性の帯状体からなる被塗布物の表面に塗膜を形成する方法としては、エクストルージョン型の塗布装置を用いた塗布方法がある。   Conventionally, as a method of forming a coating film on the surface of an object to be coated made of a plate-like body or a flexible belt-like body, there is a coating method using an extrusion type coating apparatus.

このエクストルージョン型塗布装置は、塗布液供給装置から供給された塗布液をマニホールドで塗布幅方向(被塗布物の移動方向と直交する方向)に分配し、スリットで整流した上、吐出口から吐出するもので、通常、塗布液供給装置から塗布装置に供給された量の塗布液が全て吐出口から吐出されるため、被塗布物の表面に形成される塗膜の膜厚は、塗布装置と被塗布物との相対的な移動速度と被塗布物の移動方向と直交する方向の吐出口の長さとによって決定される。   This extrusion type coating device distributes the coating solution supplied from the coating solution supply device in the coating width direction (direction perpendicular to the moving direction of the object to be coated) by the manifold, rectifies it by the slit, and discharges it from the discharge port. In general, since all the amount of the coating liquid supplied from the coating liquid supply device to the coating device is discharged from the discharge port, the film thickness of the coating film formed on the surface of the coating object is the same as that of the coating device. It is determined by the relative moving speed of the object to be coated and the length of the discharge port in the direction orthogonal to the moving direction of the object to be coated.

ところで、エクストルージョン型塗布装置は、吐出口と被塗布物との間隔が特定の範囲内にある場合には塗膜を安定して形成することが可能であるが、通常、吐出口と被塗布物との間隔が塗膜の膜厚の約2倍以上になると、塗膜を安定して形成することは困難になる。   By the way, the extrusion-type coating apparatus can stably form a coating film when the interval between the discharge port and the object to be coated is within a specific range. When the distance from the object is about twice or more the film thickness of the coating film, it becomes difficult to form the coating film stably.

例えば、特許文献1には、図15,図16に示すように、塗布液供給装置(図示しない)から供給された2つの異なる塗布液をマニホールド101,102でそれぞれ塗布幅方向(被塗布物の移動方向と直交する方向)に分配し、スリット103,104でそれぞれ整流した上、吐出口105,106から吐出させるエクストルージョン型塗布装置100によって、矢印A方向に移動する被塗布物1の表面に、2つの異なる塗布液からなる下層塗膜2及び上層塗膜3を上下に積層した積層塗膜を形成するにあたり、塗布装置100の先端部分の形状を、被塗布物1の表面上に下層塗膜2を形成するための吐出口105と被塗布物1との間隔と、下層塗膜2の上に上層塗膜3を形成するために被塗布物1の表面から離した吐出口106と被塗布物1との間隔とが異なるようにすることで、下層塗膜2と上層塗膜3との何れの層も安定して形成できるようにした方法が開示されている。   For example, in Patent Document 1, as shown in FIGS. 15 and 16, two different coating liquids supplied from a coating liquid supply apparatus (not shown) are respectively applied to manifolds 101 and 102 in the coating width direction (the coating material to be coated). In the direction orthogonal to the movement direction), rectified by the slits 103 and 104, respectively, and discharged onto the surface of the object 1 to be moved in the direction of arrow A by the extrusion type coating apparatus 100 that discharges from the discharge ports 105 and 106. In forming a multilayer coating film in which a lower coating film 2 and an upper coating film 3 made of two different coating liquids are stacked up and down, the shape of the tip portion of the coating apparatus 100 is formed on the surface of the article 1 to be coated with the lower coating film. The distance between the discharge port 105 for forming the film 2 and the object 1 to be coated, and the discharge port 106 and the object separated from the surface of the object 1 to form the upper layer film 3 on the lower layer film 2. Coating By the distance between 1 made different, method capable of forming stable even any layer of the lower coat layer 2 and the upper layer coating 3 is disclosed.

又、特許文献2には、図17に示すように、塗布液供給装置4,5によって塗布装置200に供給された2つの異なる塗布液6,7をそれぞれ塗布装置200の吐出口201,202から矢印B方向に移動する被塗布物8の表面に吐出するときに、塗布液供給装置4,5から塗布装置200に供給する塗布液6,7のそれぞれの流量q1,を図18に示すように時間的に変化させることにより、塗布液6からなる塗膜の膜厚と塗布液7からなる塗膜の膜厚との比が矢印B方向において変化する積層塗膜9(図17参照)を形成する方法が開示されている。
特開2001−345096号公報 特開2004−160274号公報
In Patent Document 2, as shown in FIG. 17, two different coating liquids 6 and 7 supplied to the coating apparatus 200 by the coating liquid supply apparatuses 4 and 5 are respectively supplied from the discharge ports 201 and 202 of the coating apparatus 200. FIG. 18 shows the flow rates q 1, q 2 of the coating liquids 6, 7 supplied from the coating liquid supply devices 4, 5 to the coating device 200 when discharging onto the surface of the workpiece 8 moving in the arrow B direction. As shown in FIG. 17, the laminated coating film 9 in which the ratio between the coating film thickness of the coating liquid 6 and the coating film thickness of the coating liquid 7 changes in the arrow B direction by changing with time (see FIG. 17). ) Is disclosed.
JP 2001-345096 A JP 2004-160274 A

しかしながら、特許文献1の塗布方法によって、下層塗膜2と上層塗膜3との積層部と上層塗膜3のみの一層部とを図20のように被塗布物1の表面に矢印A方向に交互に形成するときに、下層塗膜2の膜厚が上層塗膜3の膜厚に比べて小さい場合(図15参照)は問題ないが、下層塗膜2の膜厚が上層塗膜3の膜厚に比べて大きい場合(図16参照)は、被塗布物1の表面に上層塗膜3のみを形成するときに、上層塗膜3の塗布液を吐出する吐出口106と被塗布物1との間隔が上層塗膜3の膜厚の2倍以上になるため、被塗布物1の表面に所望の膜厚の上層塗膜3を安定して形成できない。   However, according to the coating method of Patent Document 1, the laminated portion of the lower layer coating film 2 and the upper layer coating film 3 and the single layer portion of only the upper layer coating film 3 are placed on the surface of the article 1 to be applied in the direction of arrow A as shown in FIG. When the layers are alternately formed, there is no problem when the film thickness of the lower layer coating film 2 is smaller than the film thickness of the upper layer coating film 3 (see FIG. 15). When it is larger than the film thickness (see FIG. 16), when only the upper coating film 3 is formed on the surface of the coating object 1, the discharge port 106 for discharging the coating liquid of the upper coating film 3 and the coating object 1 Therefore, the upper coating film 3 having a desired film thickness cannot be stably formed on the surface of the article 1 to be coated.

又、特許文献2の塗布方法によって、塗布液6の塗膜の膜厚及び塗布液7の塗膜の膜厚をそれぞれ被塗布物の移動方向において変化させて2つの塗膜の幕厚比が移動方向において異なる積層塗膜9を形成する(図17参照)ときに、塗布液6の塗膜の膜厚と塗布液7の塗膜の膜厚とを合計した積層塗膜の総膜厚及び塗布液6の塗膜の膜厚と塗布液7の塗膜の膜厚とが大きく変化しないように塗膜を形成する場合には適用できるが、被塗布物の移動方向における積層塗膜の総膜厚及び2つの塗膜の膜厚が大きく変化すると、具体的には、塗膜の最も厚い部分の膜厚が塗膜の最も薄い部分の膜厚の2倍以上になると、塗膜の膜厚の最も薄い部分を形成するときに、吐出口と被塗布物との間隔が広がりすぎて、被塗布物の表面に所望の膜厚の塗膜が安定して形成できない。   Further, according to the coating method of Patent Document 2, the film thickness ratio of the two coating films is changed by changing the coating film thickness of the coating liquid 6 and the coating film thickness of the coating liquid 7 in the moving direction of the object to be coated. When the different laminated coating films 9 are formed in the moving direction (see FIG. 17), the total film thickness of the laminated coating film, which is the sum of the coating film thickness of the coating liquid 6 and the coating film thickness of the coating liquid 7, Although it can be applied when forming a coating film so that the coating film thickness of coating solution 6 and the coating film thickness of coating solution 7 do not change significantly, the total number of laminated coating films in the moving direction of the coating object When the film thickness and the film thickness of the two coating films change greatly, specifically, when the film thickness of the thickest part of the coating film becomes more than twice the film thickness of the thinnest part of the coating film, When forming the thinnest part, the gap between the discharge port and the object to be coated is too wide, and a coating film with a desired film thickness is formed on the surface of the object to be coated. It can not be constant to form.

本発明は、このような従来の課題を解決するもので、複数の塗布液を被塗布物の表面に積層、塗布して複数の塗膜を積層、形成した全体の膜厚が厚い部分と、被塗布物の表面に実質的に1つの塗膜で形成された全体の膜厚が薄い部分とに、上層塗を移動方向に交互に、欠陥なく、均一に形成することができる塗布方法を提供することを目的とする。   The present invention solves such a conventional problem, laminating a plurality of coating liquids on the surface of an object to be coated, laminating a plurality of coating films, and forming a thick part of the whole film, Provided a coating method capable of uniformly forming an upper layer coating alternately in the moving direction on the surface of an object to be coated and having a thin overall film thickness formed by a single coating film. The purpose is to do.

前記目的を達成するために、本発明の塗布方法は、塗布装置と相対的に移動する被塗布物の表面に、上層塗膜と下層塗膜との積層部と上層塗膜のみからなる一層部とを交互に形成する塗布方法において、上層塗膜を形成する第1の塗布液が吐出するスリット状の第1の吐出口と、下層塗膜を形成する第2の塗布液が吐出するスリット状の第2の吐出口と、第1の塗布液が吐出するスリット状の第3の吐出口とが相対的に移動する方向の上流側から下流側に向かって並び、且つ、第1の吐出口と被塗布物との間隔が第2の吐出口及び第3の吐出口と被塗布物との間隔よりも狭くなるように形成されている前記塗布装置により、第2の吐出口から第2の塗布液を、第3の吐出口から第1の塗布液をそれぞれ吐出する工程で、下層塗膜と上層塗膜とを積層した積層部を形成し、第1の吐出口からのみ第1の塗布液を吐出する工程で、上層塗膜のみからなる一層部を形成するものである。   In order to achieve the above-mentioned object, the coating method of the present invention comprises a layer part consisting of an upper layer coating film and a lower layer coating film, and a single layer part consisting only of the upper layer coating film, on the surface of the object to be moved relative to the coating apparatus. In a coating method in which the first coating liquid for forming the upper layer coating film is discharged and the slit-shaped first discharge port for discharging the second coating liquid for forming the lower layer coating film are slit. The second discharge port and the slit-shaped third discharge port from which the first coating liquid discharges are aligned from the upstream side to the downstream side in the direction of relative movement, and the first discharge port And the application object formed so that the distance between the second discharge port and the third discharge port is smaller than the distance between the application object and the application object. In the step of discharging the first coating liquid from the third discharge port, the lower coating film and the upper coating film, To form a laminated stack unit, in the step of discharging a first coating liquid only from the first discharge opening, and forms one layer portion consisting of only the upper layer coating.

又、本発明の他の塗布方法は、塗布装置と相対的に移動する被塗布物の表面に、上層塗膜と第1の下層塗膜との第1の積層部と上層塗膜と第2の下層塗膜との第2の積層部とを交互に形成する塗布方法において、第1の下層塗膜を形成する第1の塗布液が吐出するスリット状の第1の吐出口と、第2の下層塗膜を形成する第2の塗布液が吐出するスリット状の第2の吐出口と、上層塗膜を形成する第3の塗布液を吐出するスリット状の第3の吐出口とが相対的に移動する方向の上流側から下流側に向かって並んでいる塗布装置により、第1の吐出口から第1の塗布液を、第3の吐出口から第3の塗布液をそれぞれ吐出する工程で、第1の積層部を形成し、第2の吐出口から第2の塗布液を、第3の吐出口から第3の塗布液をそれぞれ吐出する工程で、第2の積層部を形成するもので、上層塗膜と下層塗膜が積層された部分と、上層のみまたは上層と極薄い下層が積層された部分とを移動方向に交互に形成することができる。   In another coating method of the present invention, the first laminated portion of the upper layer coating film and the first lower layer coating film, the upper layer coating film, and the second layer are formed on the surface of the object to be moved relatively to the coating apparatus. In the coating method of alternately forming the second laminated portion with the lower layer coating film, the slit-shaped first discharge port from which the first coating liquid for forming the first lower layer coating film is discharged, and the second The slit-like second discharge port for discharging the second coating liquid for forming the lower layer coating film and the slit-like third discharge port for discharging the third coating liquid for forming the upper layer coating film are relative to each other. Discharging the first coating liquid from the first discharge port and the third coating liquid from the third discharge port by the coating devices arranged in the direction of movement from the upstream side to the downstream side, respectively. Then, the first laminated portion is formed, and the second coating liquid is discharged from the second discharge port, and the third coating liquid is discharged from the third discharge port, respectively. In order to form the second laminated portion, the portions where the upper layer coating film and the lower layer coating layer are laminated and the upper layer alone or the portion where the upper layer and the extremely thin lower layer are laminated are alternately formed in the moving direction. be able to.

本発明の塗布方法によれば、複数の塗布液を被塗布物の表面に積層、塗布して複数の塗膜を積層、形成した全体の膜厚が厚い部分と、被塗布物の表面に実質的に1つの塗膜で形成された全体の膜厚が薄い部分とに、上層塗膜を移動方向に交互に、欠陥なく、均一に形成することができる。   According to the coating method of the present invention, a plurality of coating liquids are laminated and coated on the surface of the object to be coated, and a plurality of coating films are laminated. Thus, it is possible to form the upper coating film alternately in the moving direction and uniformly with no defects in the portion having the entire film thickness formed by one coating film.

以下、本発明の実施の形態について、図面を参照しながら説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(実施の形態)
図1及び図2は本発明の第1の塗布方法に用いる塗膜形成装置の構成図で、10はバックアップロール11に支持されて矢印C方向に移動する可撓性帯状体の被塗布物、12は第1の塗布液13を貯留した第1のタンク、14は第1の塗布液13と成分の異なる第2の塗布液15を貯留した第2のタンク、16は第1の塗布液13を供給する第1の液供給装置、17は第2の塗布液15を供給する第2の液供給装置、18は第1のタンク12から第1の液供給装置によって供給されてきた第1の塗布液11を2つの供給路の何れか一方に供給する三方弁、300は、スリット状の第1の吐出口19,第2の吐出口20及び第3の吐出口21を被塗布物10の移動する矢印C方向の上流側から下流側に向って順次配設した塗布装置で、第1の吐出口19は被塗布物10の表面との間隔hが被塗布物10の表面に形成する上層塗膜28の膜厚t(図2参照)の2倍以内となり、第2の吐出口20は被塗布物10の表面との間隔hが被塗布物10の表面に形成する下層塗膜29の膜厚t(図1参照)の2倍以内となり、第3の吐出口21は被塗布物10に形成した下層塗膜29の表面との間隔hが上層塗膜29の膜厚t(図1参照)の2倍以内となるように設置される。
(Embodiment)
1 and 2 are configuration diagrams of a coating film forming apparatus used in the first coating method of the present invention. Reference numeral 10 denotes an object to be coated of a flexible belt supported by a backup roll 11 and moving in the direction of arrow C. Reference numeral 12 denotes a first tank storing the first coating liquid 13, reference numeral 14 denotes a second tank storing a second coating liquid 15 having a component different from that of the first coating liquid 13, and reference numeral 16 denotes a first coating liquid 13. A first liquid supply device 17 for supplying the second coating liquid 15, a first liquid supply device 17 for supplying the second coating liquid 15, and a first liquid supply device 18 supplied from the first tank 12 by the first liquid supply device. The three-way valve 300 for supplying the coating liquid 11 to one of the two supply paths 300 is provided with the slit-like first discharge port 19, second discharge port 20, and third discharge port 21 of the object 10 to be coated. In the coating apparatus sequentially arranged from the upstream side to the downstream side in the direction of the moving arrow C, the first discharge Mouth 19 becomes within 2 times the thickness t 3 of the upper layer coating 28 which is distance h 3 between the surface of the object to be coated 10 is formed on the surface of the coating object 10 (see FIG. 2), the second outlet port 20 becomes within 2 times the thickness t 1 of the lower coat layer 29 the distance h 1 between the surface of the coating object 10 is formed on the surface of the coating object 10 (see FIG. 1), the third discharge port 21 is to be distance h 2 between the surface of the lower coat layer 29 formed on the coating object 10 is placed so as to be within two times the thickness t 2 of the upper layer coating 29 (see FIG. 1).

22は三方弁18から塗布装置300に供給された第1の塗布液13を被塗布物10の幅方向〔紙面(被塗布物10が移動する矢印C方向)に対して垂直方向〕に分配する第1のマニホールド、20は液供給装置17から塗布装置300に供給された第2の塗布液15を被塗布物10の幅方向に分配する第2のマニホールド、21は三方弁18から塗布装置300に供給された第1の塗布液13を被塗布物10の幅方向に分配する第3のマニホールド、25は第1の塗布液13を第1のマニホールド22から第1の吐出口19に整流して供給するスリット、26は第2の塗布液15を第2のマニホールド23から第2の吐出口20に整流して供給するスリット、27は第1の塗布液13を第3のマニホールド24から第3の吐出口21に整流して供給するスリットである。   22 distributes the first coating liquid 13 supplied from the three-way valve 18 to the coating apparatus 300 in the width direction of the workpiece 10 (perpendicular to the paper surface (the direction of arrow C in which the workpiece 10 moves)). The first manifold 20 is a second manifold that distributes the second coating liquid 15 supplied from the liquid supply device 17 to the coating device 300 in the width direction of the workpiece 10, and 21 is the three-way valve 18 to the coating device 300. The third manifold 25 for distributing the first coating liquid 13 supplied to the substrate 10 in the width direction of the workpiece 10 rectifies the first coating liquid 13 from the first manifold 22 to the first discharge port 19. A slit 26 for supplying the second coating liquid 15 by rectifying and supplying the second coating liquid 15 from the second manifold 23 to the second discharge port 20, and 27 for the first coating liquid 13 from the third manifold 24. Rectified to 3 outlet 21 A slit for supplying Te.

先ず、このように構成された塗膜形成装置によって被塗布物10の表面に第1の塗布液13と第2の塗布液15とを塗布して上層塗膜28と下層塗膜29とを積層した積層部を形成する塗布方法について図1で説明する。   First, the first coating liquid 13 and the second coating liquid 15 are applied to the surface of the article to be coated 10 by the coating film forming apparatus thus configured, and the upper coating film 28 and the lower coating film 29 are laminated. A coating method for forming the laminated portion will be described with reference to FIG.

タンク14の第2の塗布液15を液供給装置17によって塗布装置300のマニホールド23に供給すると、第2の塗布液15は、マニホールド23で幅方向に分配され、スリット26で吐出方向に整流された上、第2の吐出口20から吐出されて、矢印C方向に移動する被塗布物10の表面に膜厚tの下層塗膜29を形成する。 When the second coating liquid 15 in the tank 14 is supplied to the manifold 23 of the coating apparatus 300 by the liquid supply apparatus 17, the second coating liquid 15 is distributed in the width direction by the manifold 23 and rectified in the discharge direction by the slit 26. In addition, a lower coating film 29 having a film thickness t 1 is formed on the surface of the workpiece 10 that is discharged from the second discharge port 20 and moves in the direction of arrow C.

同時に、タンク12の第1の塗布液13を液供給装置16によって三方弁18から塗布装置300のマニホールド24に供給すると、第1の塗布液13は、マニホールド24で幅方向に分配され、スリット27で吐出方向に整流された上、第3の吐出口21から吐出されて、矢印C方向に移動する被塗布物10に第2の吐出口20よりも上流で形成された下層塗膜29の表面に膜厚tの上層塗膜28を形成する。 At the same time, when the first coating liquid 13 in the tank 12 is supplied from the three-way valve 18 to the manifold 24 of the coating apparatus 300 by the liquid supply device 16, the first coating liquid 13 is distributed in the width direction by the manifold 24, and the slit 27 The surface of the lower coating film 29 formed upstream of the second discharge port 20 on the object 10 that is rectified in the discharge direction and discharged from the third discharge port 21 and moves in the direction of arrow C. forming an upper-layer coating film 28 having a thickness t 2 in.

この間、三方弁18から塗布装置300のマニホールド22には第1の塗布液13が供給されないので、被塗布物10の表面には、第2の塗布液15からなる下層塗膜29の上に第1の塗布液13からなる上層塗膜28を積層した積層部が形成される。   During this time, since the first coating liquid 13 is not supplied from the three-way valve 18 to the manifold 22 of the coating apparatus 300, the first coating liquid 13 is formed on the surface of the object to be coated 10 on the lower coating film 29 made of the second coating liquid 15. A laminated portion in which the upper coating film 28 made of one coating solution 13 is laminated is formed.

このとき、第2の吐出口20と被塗布物10の表面との間隔hが下層塗膜29の膜厚tの2倍以内で、第3の吐出口21と下層塗膜29の表面との間隔hが上層塗膜28の膜厚tの2倍以内であるので、上層塗膜28と下層塗膜29との積層部が被塗布物10の表面に安定して形成される。 At this time, the distance h 1 between the second discharge port 20 and the surface of the object to be coated 10 is within twice the film thickness t 1 of the lower layer coating 29, and the surfaces of the third discharge port 21 and the lower layer coating 29. distance h 2 is because it is within two times the thickness t 2 of the upper layer coating 28, the laminated portion of the upper layer coating 28 and the lower coat layer 29 is formed stably on the surface of the coating object 10 with .

又、前述の塗膜形成装置によって被塗布物10の表面に第1の塗布液13を塗布して上層塗膜28のみの一層部を形成する塗布方法について図2で説明する。
An application method in which the first coating liquid 13 is applied to the surface of the article to be coated 10 by the above-described coating film forming apparatus to form a single layer portion of only the upper layer coating film 28 will be described with reference to FIG.

タンク12の第1の塗布液13を液供給装置30によって三方弁18から塗布装置300のマニホールド22に供給すると、第1の塗布液13は、マニホールド22で幅方向に分配され、スリット25で吐出方向に整流された上、第1の吐出口19から吐出されて、矢印C方向に移動する被塗布物10の表面に膜厚tの上層塗膜28を形成する
この間、塗布装置300のマニホールド23には第2の塗布液15が供給されず、マニホールド24には第1の塗布液13が供給されないので、被塗布物10の表面には塗布液13からなる上層塗膜28のみの一層部が形成される。
When the first coating liquid 13 in the tank 12 is supplied from the three-way valve 18 to the manifold 22 of the coating apparatus 300 by the liquid supply apparatus 30, the first coating liquid 13 is distributed in the width direction by the manifold 22 and discharged by the slit 25. after being rectified in a direction, and discharged from the first discharge ports 19, during which time forming the upper layer coating 28 having a thickness t 3 on the surface of the coating object 10 to move in the direction of arrow C, the manifold of the applicator device 300 23, the second coating liquid 15 is not supplied to the manifold 24, and the first coating liquid 13 is not supplied to the manifold 24, so that only one layer of the upper coating film 28 made of the coating liquid 13 is formed on the surface of the coating object 10. Is formed.

このとき、第1の吐出口19と被塗布物10の表面との間隔hが上層塗膜28の膜厚tの2倍以内であるので、上層塗膜28のみの一層部が被塗布物10の表面に安定して形成される。 At this time, since the distance h 3 between the first discharge port 19 and the surface of the object to be coated 10 is within twice the film thickness t 3 of the upper layer coating film 28, only one layer of the upper layer coating film 28 is coated. It is stably formed on the surface of the object 10.

なお、間隔h及びhはそれぞれ膜厚t及びtの2倍以内に限定されるものではなく、例えば、第2の吐出口20及び第3の吐出口21の移動方向上流側部分を減圧したり、第2の吐出口20及び第3の吐出口21と被塗布物10との間に電界を作用させたり、第1の塗布液13及び第2の塗布液15の粘度等の物性を最適化することによって、上層塗膜28と下層塗膜29とからなる積層部の形成が安定してできれば、間隔h及びhはそれぞれ膜厚t及びtの2倍以上であっても構わない。 The intervals h 1 and h 2 are not limited to twice the film thicknesses t 1 and t 2 , respectively. For example, the second discharge port 20 and the third discharge port 21 in the moving direction upstream portion. , The electric field between the second discharge port 20 and the third discharge port 21 and the object to be coated 10, the viscosity of the first coating solution 13 and the second coating solution 15, etc. If the formation of the laminated portion composed of the upper layer coating film 28 and the lower layer coating film 29 can be stabilized by optimizing the physical properties, the intervals h 1 and h 2 are at least twice the film thicknesses t 1 and t 2 , respectively. It does not matter.

又、間隔hも膜厚tの2倍以内に限定されるものではなく、例えば、第1の吐出口18において被塗布物10の移動方向、換言すると矢印C方向の上流側部分を減圧したり、第1の吐出口18と被塗布物10との間に電界を作用させたり、第1の塗布液13の粘度等の物性を最適化することによって、上層塗膜28の形成が安定してできれば、間隔hは膜厚tの2倍以上であっても構わない。 Further, the interval h 3 is not limited to twice the film thickness t 3. For example, the moving direction of the object to be coated 10 at the first discharge port 18, in other words, the upstream portion in the direction of the arrow C is decompressed. The formation of the upper coating film 28 is stabilized by applying an electric field between the first discharge port 18 and the object to be coated 10 or by optimizing the physical properties such as the viscosity of the first coating liquid 13. If possible, the interval h 3 may be twice or more the film thickness t 3 .

このように、本発明において、同一の第1の塗布液13を吐出する第1の吐出口19と第3の吐出口21とは図1及び2に示すようにそれぞれ被塗布物10の表面との間隔が異なっているが、上層塗膜28のみの一層部を形成するときには、三方弁31によって、被塗布物10の表面との間隔が狭い第1の吐出口19から被塗布物10の表面に第1の塗布液13を吐出させ、又、上層塗膜28と下層塗膜29とからなる積層部を形成するときには、三方弁31によって、被塗布物10の表面との間隔が広い第3の吐出口21から下層塗膜29の表面に第1の塗布液13を吐出させるので、第1の吐出口19と被塗布物10の表面との間隔及び第3の吐出口21と下層塗膜29の表面との間隔がほぼ同一になって、被塗布物10の表面に塗布する第1の塗布液13の膜厚と下層塗膜29の表面に塗布する第1の塗布液13の膜厚とがほぼ同一の一層部と積層部とが被塗布物10の表面に交互に形成できる。   Thus, in the present invention, the first discharge port 19 and the third discharge port 21 for discharging the same first coating liquid 13 are respectively the surface of the object 10 to be coated as shown in FIGS. However, when forming a single layer portion of only the upper layer coating film 28, the three-way valve 31 causes the surface of the article 10 to be coated from the first discharge port 19 having a small distance from the surface of the article 10 to be coated. When the first coating liquid 13 is discharged to form a laminated portion composed of the upper layer coating film 28 and the lower layer coating film 29, the three-way valve 31 causes a third gap that is wide with the surface of the article 10 to be coated. Since the first coating liquid 13 is discharged from the discharge port 21 onto the surface of the lower layer coating film 29, the distance between the first discharge port 19 and the surface of the coating object 10 and the third discharge port 21 and the lower layer coating film The distance between the surface 29 and the surface of the material to be coated 10 is almost the same, A single layer portion and a laminated portion in which the film thickness of the first coating liquid 13 and the film thickness of the first coating liquid 13 applied to the surface of the lower layer coating film 29 are substantially the same are alternately formed on the surface of the article to be coated 10. it can.

次に、前述の塗膜形成装置によって上層塗膜28及び下層塗膜29の積層部と上層塗膜28のみの一層部とを上層塗膜28が途切れることなく移動方向に交互に形成する塗布方法(図3参照)について具体的に説明する。   Next, the coating method for alternately forming the laminated portion of the upper layer coating film 28 and the lower layer coating film 29 and the single layer portion of the upper layer coating film 28 in the moving direction without interruption by the above-described coating film forming apparatus. (Refer FIG. 3) is demonstrated concretely.

被塗布物10の表面に一層部から積層部にかけて上層塗膜28を途切れることなく形成するには、第1の工程〔図4(a)参照〕において、第2の吐出口20からの第2の塗布液15の吐出及び第3の吐出口21からの第1の塗布液13の吐出を停止した状態で、第1の吐出口19から第1の塗布液13を吐出することにより、矢印C方向に移動する被塗布物10の表面に第1の塗布液13を塗布して、上層塗膜28のみからなる一層部を形成する。   In order to form the upper layer coating film 28 on the surface of the coating object 10 from one layer part to the laminated part without interruption, in the first step (see FIG. 4A), the second coating from the second discharge port 20 is performed. By discharging the first coating liquid 13 from the first discharge port 19 in a state where the discharge of the coating liquid 15 and the discharge of the first coating liquid 13 from the third discharge port 21 are stopped, the arrow C The first coating liquid 13 is applied to the surface of the object 10 to be moved in the direction to form a single layer portion consisting only of the upper layer coating film 28.

第2の工程〔図4(b)参照〕において、第1の吐出口19からの第1の塗布液13の吐出を停止して、第1の吐出口19及び第3の吐出口21からの第1の塗布液13の吐出と第2の吐出口20からの第2の塗布液15の吐出とを全て停止することにより、被塗布物10の表面への第1の塗布液13の塗布を停止して、上層塗膜28のみからなる一層部の形成を停止する。   In the second step (see FIG. 4B), the discharge of the first coating liquid 13 from the first discharge port 19 is stopped, and the discharge from the first discharge port 19 and the third discharge port 21 is stopped. By stopping the discharge of the first coating liquid 13 and the discharge of the second coating liquid 15 from the second discharge port 20, the application of the first coating liquid 13 to the surface of the object to be coated 10 is stopped. The formation of a single layer portion consisting only of the upper layer coating film 28 is stopped.

第3の工程〔図4(c)参照〕において、第1の吐出口19及び第3の吐出口21からの第1の塗布液13の吐出を停止した状態で、第2の吐出口20からの第2の塗布液15の吐出を開始することにより、矢印C方向に移動する被塗布物10の表面に第2の塗布液15を第1及び第2の工程で形成した上層塗膜28の端部から塗布して、下層塗膜29の形成を開始する。   In the third step (see FIG. 4C), in the state where the discharge of the first coating liquid 13 from the first discharge port 19 and the third discharge port 21 is stopped, the second discharge port 20 By starting the discharge of the second coating liquid 15, the upper coating film 28 formed by the first and second steps of the second coating liquid 15 on the surface of the workpiece 10 moving in the direction of arrow C is applied. Applying from the end, formation of the lower layer coating film 29 is started.

第4の工程〔図4(d)参照〕において、第1の吐出口19からの第1の塗布液13の吐出を停止した状態で、第2の吐出口20から第2の塗布液15を吐出し続けると共に、第3の吐出口21からの第1の塗布液13の吐出を開始することにより、矢印C方向に移動する被塗布物10の表面に第2の塗布液15を塗布して、下層塗膜29を形成し続けると共に、第3の工程で形成した下層塗膜29の先端部から下層塗膜29の表面に第1の塗布液13を塗布して、上層塗膜28で下層塗膜29の先端面を覆い且つ下層塗膜29と上層塗膜28とを積層した積層部の形成を開始する。   In the fourth step (see FIG. 4D), the second coating liquid 15 is poured from the second ejection port 20 in a state where the ejection of the first coating liquid 13 from the first ejection port 19 is stopped. While continuing to discharge, by starting the discharge of the first coating liquid 13 from the third discharge port 21, the second coating liquid 15 is applied to the surface of the object to be applied 10 moving in the direction of arrow C. The lower coating film 29 is continuously formed, and the first coating solution 13 is applied to the surface of the lower coating film 29 from the tip of the lower coating film 29 formed in the third step. The formation of a laminated portion that covers the front end surface of the coating film 29 and laminates the lower layer coating film 29 and the upper layer coating film 28 is started.

又、被塗布物10の表面に積層部から一層部にかけて上層塗膜28を途切れることなく形成するには、第5の工程〔図5(a)参照〕において、第1の吐出口19からの第1の塗布液13の吐出を停止した状態で、第2の吐出口20から第2の塗布液15を、第3の吐出口21から第1の塗布液13をそれぞれ吐出することにより、矢印C方向に移動する被塗布物10の表面に第2の塗布液15を塗布して、下層塗膜29を形成すると共に、下層塗膜29の表面に第1の塗布液13を塗布して、下層塗膜29と上層塗膜28とを積層した積層部を形成する。   Further, in order to form the upper layer coating film 28 on the surface of the object to be coated 10 without any interruption from the laminated portion to the single layer portion, in the fifth step [see FIG. With the discharge of the first coating liquid 13 stopped, the second coating liquid 15 is discharged from the second discharge port 20 and the first coating liquid 13 is discharged from the third discharge port 21, respectively. The second coating liquid 15 is applied to the surface of the article 10 to be moved in the C direction to form the lower coating film 29, and the first coating liquid 13 is applied to the surface of the lower coating film 29, A laminated portion in which the lower layer coating film 29 and the upper layer coating film 28 are laminated is formed.

第6の工程〔図5(b)参照〕において、第2の吐出口20からの第2の塗布液15の吐出と第3の吐出口21からの第1の塗布液13の吐出とを継続した状態で、第1の吐出口19からの第1の塗布液13の吐出を開始することにより、矢印C方向に移動する被塗布物10の表面に第2の塗布液15を塗布して、下層塗膜29を形成し、下層塗膜29の表面に第1の塗布液13を塗布して、下層塗膜29と上層塗膜28とを積層した積層部を形成すると共に、被塗布物10の表面への第1の塗布液13の塗布を開始して、上層塗膜28のみからなる一層部の形成を開始する。   In the sixth step (see FIG. 5B), the discharge of the second coating liquid 15 from the second discharge port 20 and the discharge of the first coating liquid 13 from the third discharge port 21 are continued. In this state, by starting the discharge of the first coating liquid 13 from the first discharge port 19, the second coating liquid 15 is applied to the surface of the workpiece 10 moving in the direction of arrow C, The lower coating film 29 is formed, and the first coating liquid 13 is applied to the surface of the lower coating film 29 to form a laminated portion in which the lower coating film 29 and the upper coating film 28 are laminated. Application of the first coating liquid 13 to the surface of the first layer is started, and formation of a single layer portion consisting only of the upper layer coating film 28 is started.

第7の工程〔図5(c)参照〕において、第1の吐出口19及び第3の吐出口21からの第1の塗布液13の吐出を継続した状態で、第2の吐出口20からの第2の塗布液15の吐出を停止することにより、下層塗膜29の表面に第1の塗布液13を塗布して、上層塗膜28を積層した積層部と、被塗布物10の表面に第1の塗布液13を塗布して、上層塗膜28のみからなる一層部との形成を継続し、第6の工程で形成した上層塗膜28の先端部で下層塗膜29の形成を終了する。   In the seventh step (see FIG. 5C), the second discharge port 20 continues to discharge the first coating liquid 13 from the first discharge port 19 and the third discharge port 21. By stopping the discharge of the second coating liquid 15, the first coating liquid 13 is applied to the surface of the lower coating film 29 and the upper coating film 28 is laminated, and the surface of the article 10 to be coated. The first coating liquid 13 is applied to the first coating liquid 13 to continue the formation with a single layer portion consisting only of the upper coating film 28, and the lower coating film 29 is formed at the tip of the upper coating film 28 formed in the sixth step. finish.

第8の工程〔図5(d)参照〕において、第2の吐出口20からの第2の塗布液15の吐出と第3の吐出口21からの第1の塗布液13の吐出とを停止した状態で、第1の吐出口19からの第1の塗布液13の吐出を継続することにより、下層塗膜29の表面から第6の工程で形成した上層塗膜28の先端部まで第1の塗布液13を塗布して、上層塗膜28で下層塗膜29の後端面を覆うと共に、矢印C方向に移動する被塗布物10の表面に第1の塗布液13を塗布して、上層塗膜28のみからなる一層部の形成を継続する。   In the eighth step (see FIG. 5D), the discharge of the second coating liquid 15 from the second discharge port 20 and the discharge of the first coating liquid 13 from the third discharge port 21 are stopped. In this state, by continuing the discharge of the first coating liquid 13 from the first discharge port 19, the first coating from the surface of the lower coating film 29 to the tip of the upper coating film 28 formed in the sixth step is performed. The coating liquid 13 is applied to cover the rear end face of the lower coating film 29 with the upper coating film 28, and the first coating liquid 13 is applied to the surface of the coating object 10 moving in the direction of arrow C, The formation of a single layer portion consisting only of the coating film 28 is continued.

このように前述の塗膜形成装置において第1乃至第8の工程を経ることにより、被塗布物10の表面に上層塗膜28及び下層塗膜29の積層部と上層塗膜28のみの一層部とを上層塗膜28が途切れることなく交互に形成することができる。   Thus, by passing through the first to eighth steps in the above-described coating film forming apparatus, the upper layer coating film 28 and the lower layer coating film 29 are laminated on the surface of the article 10 to be coated and only one layer of the upper layer coating film 28 is formed. And the upper coating film 28 can be alternately formed without interruption.

なお、同一の上層塗膜28を形成する第1の塗布液13を異なる2つの第1の吐出口19と第3の吐出口21とから吐出させると共に、この第1の吐出口19及び第3の吐出口21からの第1の塗布液13の吐出量をそれぞれ独立して制御する方法として、本実施例では、三方弁18による方法を示したが、この方法に特に限定されるものではなく、例えば、第1の吐出口19及び第3の吐出口21に対してそれぞれ液供給装置を個別に取り付ける方法でもよい。   In addition, while discharging the 1st coating liquid 13 which forms the same upper layer coating film 28 from two different 1st discharge ports 19 and 3rd discharge ports 21, this 1st discharge port 19 and 3rd In this embodiment, the method using the three-way valve 18 is shown as a method for independently controlling the discharge amount of the first coating liquid 13 from the discharge port 21. However, the method is not particularly limited to this method. For example, a method of individually attaching the liquid supply devices to the first discharge port 19 and the third discharge port 21 may be used.

又、第1の塗布液13或いは第2の塗布液15の塗布液の塗り始めの部分や塗り終わりの部分において、厚塗りや薄塗りがないように、より良好に塗布するためには、例えば、図6に示すように、塗布装置300の塗布液の流路、例えば、第1のマニホールド22,第2のマニホールド23或いは第3のマニホールド24に連通するシリンダ30に内設したピストン31を変位させればよい。   In addition, in order to apply more satisfactorily so that there is no thick coating or thin coating in the first coating solution 13 or the second coating solution 15 at the beginning of coating or at the end of coating, for example, As shown in FIG. 6, the piston 31 provided in the cylinder 30 communicating with the flow path of the coating liquid of the coating device 300, for example, the first manifold 22, the second manifold 23, or the third manifold 24 is displaced. You can do it.

即ち、塗布液の吐出を継続するときには、ピストン31を動かさなければ〔図6(a)参照〕、一定量の塗布液が吐出口から吐出され続けて、一定の膜厚の塗膜が形成され、又、塗布液の吐出を停止するときには、ピストン31を容量V分だけ矢印D方向に引き出せば、吐出口付近に吐出される塗布液が容量V分だけ吸引されて〔図6(b)参照〕、吐出口から吐出されていた塗布液の切れが良好になり、更に、塗布液の吐出を開始するときには、ピストン31を容量V分だけ矢印E方向に押し込めば、吐出口から吐出される塗布液が容量V分だけ増量されて押し出され〔図6(c)参照〕、塗布液の供給が早く安定する。 That is, when the discharge of the coating liquid is continued, if the piston 31 is not moved (see FIG. 6A), a fixed amount of the coating liquid is continuously discharged from the discharge port, and a coating film having a fixed film thickness is formed. also when stopping the discharge of the coating solution, if pulled out of the piston 31 by volume V 1 minute in the direction of arrow D, and the coating liquid discharged in the vicinity of the discharge port is sucked by volume V 2 minutes [FIG 6 (b )], the now cut of the coating liquid that has been discharged from the discharge port is good, further, when starting the discharge of the coating solution, the piston 31 volume V only 1 minute if pushed in the direction of arrow E, discharged from the discharge port is the coating liquid is extruded is increased by the capacity V 2 minutes [refer to FIG. 6 (c)], the supply of the coating liquid quickly stabilized.

更に、塗布装置300に少なくとも第4の吐出口32を設けると共に、第3の塗布液33をタンク34から第4の吐出口32に供給する液供給装置35(図7参照)を設けることにより、例えば、第3の工程から第6の工程において第3の塗布液33を被塗布物10の表面に、第2の塗布液15を第3の塗布液33の表面に、第1の塗布液13を第2の塗布液15の表面に塗布することにより、図8に示すように、被塗布物10の表面に上層塗膜28,下層塗膜29及び第2の下層塗膜36の3層からなる積層部を容易に形成することができる。   Furthermore, by providing at least a fourth discharge port 32 in the coating apparatus 300 and providing a liquid supply device 35 (see FIG. 7) for supplying the third coating liquid 33 from the tank 34 to the fourth discharge port 32, For example, in the third to sixth steps, the third coating liquid 33 is applied to the surface of the article 10, the second coating liquid 15 is applied to the surface of the third coating liquid 33, and the first coating liquid 13 is applied. Is applied to the surface of the second coating liquid 15, so that, as shown in FIG. 8, the upper coating film 28, the lower coating film 29, and the second lower coating film 36 are formed on the surface of the coating object 10. It is possible to easily form the stacked portion.

但し、異なる複数の種類の塗布液が塗布装置300の内部で混じることなく合流するものであれば、塗布装置300には、追加する塗布液の種類の数だけの吐出口を設ける必要はなく、1つの吐出口から複数の種類の塗布液を吐出させてもよい。   However, as long as a plurality of different types of coating liquids merge without being mixed inside the coating apparatus 300, the coating apparatus 300 does not need to be provided with as many ejection openings as the number of types of coating liquid to be added. A plurality of types of coating liquids may be discharged from one discharge port.

更に、被塗布物10は可撓性の帯状体を例に説明したが、板状体であってもよい。   Furthermore, although the to-be-coated object 10 demonstrated the flexible strip | belt-shaped body as an example, a plate-shaped body may be sufficient.

次に、前述の塗膜形成装置によって被塗布物10の表面に厚い上層塗膜53及び厚い第1の下層塗膜54が積層された第1の積層部と、厚い上層塗膜53及び極めて薄い第2の下層塗膜54が積層された第2の積層部とを上層塗膜28が途切れることなく移動方向に交互に形成する(図9参照)塗布方法について説明する。   Next, the first laminated portion in which the thick upper layer coating film 53 and the thick first lower layer coating film 54 are laminated on the surface of the article to be coated 10 by the above-described coating film forming apparatus, the thick upper layer coating film 53 and the extremely thin layer. A coating method will be described in which the second laminated portion on which the second lower layer coating film 54 is laminated is alternately formed in the moving direction without the upper layer coating film 28 being interrupted (see FIG. 9).

図10及び図11は本発明の第2の塗布方法に用いる塗膜形成装置の構成図で、本発明の第1の塗布方法に用いる塗膜形成装置の符号と同一の符号であれば、同一部分を示す。   FIGS. 10 and 11 are configuration diagrams of the coating film forming apparatus used in the second coating method of the present invention, and the same reference numerals as those of the coating film forming apparatus used in the first coating method of the present invention are the same. Indicates the part.

40は第1の塗布液41を貯留した第1のタンク、42は第1の塗布液41と成分の異なる第2の塗布液43を貯留した第2のタンク、44は第1の塗布液41及び第2の塗布液43と成分の異なる第3の塗布液45を貯留した第2のタンク、46は第1の塗布液41を供給する第1の液供給装置、47は第2の塗布液43を供給する第2の液供給装置、48は第3の塗布液45を供給する第3の液供給装置、400は、スリット状の第1の吐出口49,第2の吐出口50及び第3の吐出口51を被塗布物10の移動する矢印C方向の上流側から下流側に向って順次配設した塗布装置で、第1の吐出口49は被塗布物10の表面との間隔hが被塗布物10の表面に形成する第1の下層塗膜52の膜厚t(図10参照)の2倍以内となり、第3の吐出口51は第1の下層塗膜52の表面との間隔hが上層塗膜53の膜厚t(図10参照)の2倍以内となり、第2の吐出口50は被塗布物10の表面との間隔hが被塗布物10の表面に形成する第2の下層塗膜54の膜厚t(図11参照)の2倍以内となり、第3の吐出口51と第2の下層塗膜54の表面との間隔hが上層塗膜53の膜厚t(図11参照)の2倍以内となるように設置される。 Reference numeral 40 denotes a first tank storing a first coating liquid 41, 42 denotes a second tank storing a second coating liquid 43 having a component different from that of the first coating liquid 41, and 44 denotes a first coating liquid 41. And a second tank that stores a third coating liquid 45 having a component different from that of the second coating liquid 43, 46 is a first liquid supply device that supplies the first coating liquid 41, and 47 is a second coating liquid. 43 is a second liquid supply device for supplying 43, 48 is a third liquid supply device for supplying a third coating liquid 45, 400 is a slit-like first discharge port 49, second discharge port 50, and second liquid supply device. 3 is a coating apparatus in which the three discharge ports 51 are sequentially arranged from the upstream side to the downstream side in the direction of arrow C in which the workpiece 10 moves. 4 is within 2 times the thickness t 4 of the first lower coat layer 52 formed on the surface of the coating object 10 (see FIG. 10) The third discharge port 51 becomes within 2 times the thickness t 5 of the first lower coat layer spacing h 5 is upper-layer coating film 53 with the surface 52 (see FIG. 10), the second outlet port 50 is to be The distance h 6 from the surface of the coated object 10 is within twice the film thickness t 6 (see FIG. 11) of the second lower coating film 54 formed on the surface of the coated object 10, and the third discharge port 51 and The distance h 7 from the surface of the second lower layer coating film 54 is set to be within twice the film thickness t 7 (see FIG. 11) of the upper layer coating film 53.

55は第1の液供給装置46から塗布装置400に供給された第1の塗布液41を被塗布物10の幅方向〔紙面(被塗布物10が移動する矢印C方向)に対して垂直方向〕に分配する第1のマニホールド、56は第2の液供給装置47から塗布装置400に供給された第2の塗布液43を被塗布物10の幅方向に分配する第2のマニホールド、57は第3の液供給装置48から塗布装置400に供給された第3の塗布液45を被塗布物10の幅方向に分配する第3のマニホールド、58は第1の塗布液41を第1のマニホールド55から第1の吐出口49に整流して供給するスリット、59は第2の塗布液43を第2のマニホールド56から第2の吐出口50に整流して供給するスリット、60は第3の塗布液45を第3のマニホールド57から第3の吐出口51に整流して供給するスリットである。   55 denotes the first coating liquid 41 supplied from the first liquid supply device 46 to the coating device 400 in the width direction of the coating object 10 (perpendicular to the paper surface (the direction of arrow C in which the coating object 10 moves)). The first manifold 56 is distributed to the coating device 400 from the second liquid supply device 47 and the second manifold 57 is distributed in the width direction of the workpiece 10. A third manifold that distributes the third coating liquid 45 supplied from the third liquid supply apparatus 48 to the coating apparatus 400 in the width direction of the object to be coated 10, and 58 represents the first coating liquid 41 in the first manifold. 55 is a slit that rectifies and supplies the second coating liquid 43 from the second manifold 56 to the second discharge port 50, and 60 is a third slit. The coating liquid 45 is supplied to the third manifold 57. A slit supplies the rectified to al third discharge port 51.

先ず、このように構成された塗膜形成装置によって被塗布物10の表面に第1の塗布液41と第3の塗布液45とを塗布して第1の下層塗膜52と上層塗膜53とを積層した積層部を形成する塗布方法について図10で説明する。   First, the first coating liquid 41 and the third coating liquid 45 are applied to the surface of the article 10 by the coating film forming apparatus configured as described above, and the first lower coating film 52 and the upper coating film 53 are applied. A coating method for forming a laminated portion in which these are laminated will be described with reference to FIG.

タンク40の第1の塗布液41を液供給装置46によって塗布装置400のマニホールド55に供給すると、第1の塗布液41は、マニホールド55で幅方向に分配され、スリット58で吐出方向に整流された上、第1の吐出口49から吐出されて、矢印C方向に移動する被塗布物10の表面に膜厚tの第1の下層塗膜52を形成する。 When the first coating liquid 41 in the tank 40 is supplied to the manifold 55 of the coating apparatus 400 by the liquid supply apparatus 46, the first coating liquid 41 is distributed in the width direction by the manifold 55 and rectified in the discharge direction by the slit 58. In addition, a first lower layer coating film 52 having a film thickness t 4 is formed on the surface of the object to be coated 10 that is discharged from the first discharge port 49 and moves in the direction of arrow C.

同時に、タンク44の第3の塗布液45を液供給装置48によって塗布装置400のマニホールド57に供給すると、第3の塗布液45は、マニホールド57で幅方向に分配され、スリット60で吐出方向に整流された上、第3の吐出口51から吐出されて、矢印C方向に移動する被塗布物10に第3の吐出口51よりも上流で形成された第1の下層塗膜52の表面に膜厚tの上層塗膜53を形成する。 At the same time, when the third coating liquid 45 in the tank 44 is supplied to the manifold 57 of the coating apparatus 400 by the liquid supply apparatus 48, the third coating liquid 45 is distributed in the width direction by the manifold 57 and in the discharge direction by the slit 60. On the surface of the first lower layer coating film 52 formed on the upstream side of the third discharge port 51 on the coating object 10 which is rectified and discharged from the third discharge port 51 and moves in the direction of arrow C. forming an upper-layer coating film 53 having a thickness t 5.

この間、液供給装置47によって塗布装置400のマニホールド56には第2の塗布液43が供給されないので、被塗布物10の表面には、第1の塗布液15からなる第1の下層塗膜52の上に第3の塗布液45からなる上層塗膜53を積層した積層部が形成される。   During this time, since the second coating liquid 43 is not supplied to the manifold 56 of the coating apparatus 400 by the liquid supply apparatus 47, the first lower layer coating film 52 made of the first coating liquid 15 is formed on the surface of the coating object 10. A laminated portion is formed by laminating an upper coating film 53 made of the third coating liquid 45 thereon.

このとき、第1の吐出口49と被塗布物10の表面との間隔hが第1の下層塗膜52の膜厚tの2倍以内で、第3の吐出口51と第1の下層塗膜52の表面との間隔hが上層塗膜53の膜厚tの2倍以内であるので、上層塗膜53と第1の下層塗膜52との積層部が被塗布物10の表面に安定して形成される。 At this time, the distance h 4 between the first discharge port 49 and the surface of the object to be coated 10 is within twice the film thickness t 4 of the first lower layer coating film 52, and the third discharge port 51 and the first Since the distance h 5 from the surface of the lower layer coating film 52 is within twice the film thickness t 5 of the upper layer coating film 53, the laminated portion of the upper layer coating film 53 and the first lower layer coating film 52 is the object to be coated 10. It is stably formed on the surface.

又、前述の塗膜形成装置によって被塗布物10の表面に第2の塗布液43と第3の塗布液45とを塗布して第2の下層塗膜54と上層塗膜53とを積層した積層部を形成する塗布方法について図11で説明する。   In addition, the second coating liquid 43 and the third coating liquid 45 are applied to the surface of the article 10 by the above-described coating film forming apparatus, and the second lower coating film 54 and the upper coating film 53 are laminated. A coating method for forming the laminated portion will be described with reference to FIG.

タンク42の第2の塗布液43を液供給装置47によって塗布装置400のマニホールド56に供給すると、第2の塗布液43は、マニホールド56で幅方向に分配され、スリット59で吐出方向に整流された上、第2の吐出口50から吐出されて、矢印C方向に移動する被塗布物10の表面に膜厚tの第2の下層塗膜54を形成する
同時に、タンク44の第3の塗布液45を液供給装置48によって塗布装置400のマニホールド57に供給すると、第3の塗布液45は、マニホールド57で幅方向に分配され、スリット60で吐出方向に整流された上、第3の吐出口51から吐出されて、矢印C方向に移動する被塗布物10に第3の吐出口51よりも上流で形成された第2の下層塗膜53の表面に膜厚tの上層塗膜53を形成する。
When the second coating liquid 43 in the tank 42 is supplied to the manifold 56 of the coating apparatus 400 by the liquid supply apparatus 47, the second coating liquid 43 is distributed in the width direction by the manifold 56 and rectified in the discharge direction by the slit 59. In addition, a second lower layer coating film 54 having a film thickness t 6 is formed on the surface of the article 10 to be applied, which is discharged from the second discharge port 50 and moves in the direction of arrow C. When the coating liquid 45 is supplied to the manifold 57 of the coating apparatus 400 by the liquid supply apparatus 48, the third coating liquid 45 is distributed in the width direction by the manifold 57, rectified in the discharge direction by the slit 60, and then the third liquid. An upper coating film having a film thickness t 7 is formed on the surface of the second lower coating film 53 formed upstream of the third ejection port 51 on the object 10 that is discharged from the ejection port 51 and moves in the direction of arrow C. Form 53

この間、液供給装置46によって塗布装置400のマニホールド55には第1の塗布液41が供給されないので、第2の塗布液41からなる第2の下層塗膜54の上に第3の塗布液45からなる上層塗膜53を積層した積層部が形成される。   During this time, since the first coating liquid 41 is not supplied to the manifold 55 of the coating apparatus 400 by the liquid supply apparatus 46, the third coating liquid 45 is formed on the second lower coating film 54 made of the second coating liquid 41. A laminated portion is formed by laminating the upper coating film 53 made of the above.

このとき、第2の吐出口50と被塗布物10の表面との間隔hが第2の下層塗膜54の膜厚tの2倍以内で、第3の吐出口51と第2の下層塗膜54の表面との間隔hが上層塗膜53の膜厚tの2倍以内であるので、上層塗膜53と第2の下層塗膜54との積層部が被塗布物10の表面に安定して形成される。 At this time, the distance h 6 between the second discharge port 50 and the surface of the object to be coated 10 is within twice the film thickness t 6 of the second lower layer coating film 54, and the third discharge port 51 and the second discharge port 50. Since the distance h 7 from the surface of the lower layer coating film 54 is within twice the film thickness t 7 of the upper layer coating film 53, the laminated portion of the upper layer coating film 53 and the second lower layer coating film 54 is the object to be coated 10. It is stably formed on the surface.

なお、間隔h及びhはそれぞれ膜厚t及びtの2倍以内に限定されるものではなく、例えば、第1の吐出口49及び第3の吐出口51の移動方向上流側部分を減圧したり、第1の吐出口49及び第3の吐出口51と被塗布物10との間に電界を作用させたり、第1の塗布液41及び第3の塗布液45の粘度等の物性を最適化することによって、第1の下層塗膜52と上層塗膜53とからなる積層部の形成が安定してできれば、間隔h及びhはそれぞれ膜厚t及びtの2倍以上であっても構わない。 The intervals h 4 and h 5 are not limited to twice the film thicknesses t 4 and t 5 , respectively. For example, the first discharge port 49 and the third discharge port 51 are upstream in the moving direction. , The electric field between the first discharge port 49 and the third discharge port 51 and the object to be coated 10, the viscosity of the first coating solution 41 and the third coating solution 45, etc. If the formation of the laminated portion composed of the first lower layer coating film 52 and the upper layer coating film 53 can be stabilized by optimizing the physical properties, the intervals h 4 and h 5 are 2 of the film thicknesses t 4 and t 5 , respectively. It may be more than double.

又、間隔h及びhもそれぞれ膜厚t及びtの2倍以内に限定されるものではなく、例えば、第2の吐出口50及び第3の吐出口51の移動方向上流側部分を減圧したり、第2の吐出口50及び第3の吐出口51と被塗布物10の間に電界を作用させたり、第2の塗布液43及び第3の塗布液45の粘度等の物性を最適化することによって、第2の下層塗膜54と上層塗膜53とからなる積層部の形成が安定してできれば、間隔h及びhはそれぞれ膜厚t及びtの2倍以上であっても構わない。 Further, the distances h 6 and h 7 are not limited to twice the film thicknesses t 6 and t 7 , respectively. For example, the upstream portion in the moving direction of the second discharge port 50 and the third discharge port 51 , The electric field is applied between the second discharge port 50 and the third discharge port 51 and the object to be coated 10, or the physical properties such as the viscosity of the second coating solution 43 and the third coating solution 45. If the formation of the laminated portion composed of the second lower layer coating film 54 and the upper layer coating film 53 can be stably achieved, the intervals h 6 and h 7 are twice the film thicknesses t 6 and t 7 , respectively. It may be above.

更に、本発明における第1の塗布液41と第2の塗布液43とは、被塗布物10の表面への塗布直後から乾燥終了までの間に膜厚の減少する割合が異なり、第1の下層塗膜52と第2の下層塗膜54との何れか一方を乾燥後に薄い層とすることができる方法であれば、その方法は特に限定するものではないが、例えば、第1の塗布液41と第2の塗布液43の固形分濃度を互いに異なったものとしたり、第1の塗布液41と第2の塗布液43の何れか一方を希薄な樹脂溶液又は揮発性材料としたりすることで、第1の下層塗膜52と第2の下層塗膜54の何れか一方を乾燥後に極めて膜厚の薄い層とすることができる。 Further, the first coating liquid 41 and the second coating liquid 43 in the present invention have different ratios in which the film thickness decreases immediately after coating on the surface of the article to be coated 10 until the end of drying. The method is not particularly limited as long as any one of the lower layer coating film 52 and the second lower layer coating film 54 can be made into a thin layer after drying. For example, the first coating liquid 41 and the second coating liquid 43 have different solid concentrations, or one of the first coating liquid 41 and the second coating liquid 43 is a dilute resin solution or volatile material. Thus, any one of the first lower layer coating film 52 and the second lower layer coating film 54 can be formed into a very thin layer after drying.

即ち、本実施例では図9において第1の下層塗膜52を厚い層として、第2の下層塗膜54を極めて薄い層として図示しているが、逆に、第1の下層塗膜52が極めて薄い層で、第2の下層塗膜54が厚い層であってもよい。   That is, in this embodiment, the first lower layer coating film 52 is shown as a thick layer and the second lower layer coating layer 54 is shown as a very thin layer in FIG. The second lower coating film 54 may be a very thin layer and a thick layer.

この結果、矢印C方向に移動する被塗布物10の表面に、図3に示すような上層塗膜53と下層塗膜29との積層部と上層塗膜28のみの一層部とを交互に形成したものと実質的に同等な塗膜(図9参照)を形成することができる。   As a result, on the surface of the article 10 to be moved in the direction of arrow C, a laminated portion of the upper coating 53 and the lower coating 29 and a single layer of only the upper coating 28 are alternately formed as shown in FIG. A coating film (see FIG. 9) substantially equivalent to that obtained can be formed.

次に、前述の塗膜形成装置によって矢印C方向に移動する被塗布物10の表面に、上層塗膜53及び第1の下層塗膜52の積層部と上層塗膜53及び第2の下層塗膜54の積層部とを上層塗膜53が途切れることなく移動方向に交互に形成する塗布方法(図9参照)について具体的に説明する。   Next, the upper layer coating film 53 and the first lower layer coating film 52 and the upper layer coating film 53 and the second lower layer coating are applied to the surface of the object 10 to be moved in the direction of arrow C by the coating film forming apparatus. A coating method (see FIG. 9) for forming the laminated portion of the film 54 alternately in the moving direction without interruption of the upper layer coating film 53 will be specifically described.

上層塗膜53及び第1の下層塗膜52の積層部から上層塗膜53及び第2の下層塗膜54の積層部にかけて上層塗膜28を途切れることなく形成するには、第1の工程〔図12(a)参照〕において、第2の吐出口50からの第2の塗布液43の吐出を停止した状態で、第1の吐出口49から第1の塗布液41を、第3の吐出口51から第3の塗布液45をそれぞれ吐出することにより、第1の塗布液41を矢印C方向に移動する被塗布物10の表面に塗布して第1の下層塗膜52を形成すると共に、第3の塗布液45を矢印C方向に移動する第1の下層塗膜52の表面に塗布して上層塗膜53を形成することにより、第1の下層塗膜52及び上層塗膜53からなる積層部を形成する。   In order to form the upper layer coating film 28 without interruption from the lamination part of the upper layer coating film 53 and the first lower layer coating film 52 to the lamination part of the upper layer coating film 53 and the second lower layer coating film 54, the first step [ In FIG. 12A, in the state where the discharge of the second coating liquid 43 from the second discharge port 50 is stopped, the first coating liquid 41 is discharged from the first discharge port 49 to the third discharge. By respectively discharging the third coating liquid 45 from the outlet 51, the first coating liquid 41 is applied to the surface of the object 10 to be moved in the direction of arrow C to form the first lower layer coating film 52. From the first lower layer coating film 52 and the upper layer coating film 53, the third coating liquid 45 is applied to the surface of the first lower layer coating film 52 moving in the direction of arrow C to form the upper layer coating film 53. A laminated portion is formed.

第2の工程〔図12(b)参照〕において、第1の吐出口19からの第1の塗布液13の吐出及び第2の吐出口50からの第2の塗布液43の吐出を停止した状態で、第3の吐出口51からの第3の塗布液51の吐出を継続することにより、被塗布物10の表面への第1の塗布液41の塗布を停止して、第1の下層塗膜52の形成を停止すると共に、第1の下層塗膜52の表面への第3の塗布液45の塗布を継続して、第1の下層塗膜52及び上層塗膜53からなる積層部を形成し続ける。   In the second step (see FIG. 12B), the discharge of the first coating liquid 13 from the first discharge port 19 and the discharge of the second coating liquid 43 from the second discharge port 50 were stopped. In this state, by continuing the discharge of the third coating liquid 51 from the third discharge port 51, the application of the first coating liquid 41 to the surface of the object to be coated 10 is stopped, and the first lower layer The formation of the coating film 52 is stopped, and the application of the third coating liquid 45 to the surface of the first lower layer coating film 52 is continued, so that the laminated portion composed of the first lower layer coating film 52 and the upper layer coating film 53 Continue to form.

第3の工程〔図12(c)参照〕において、第1の吐出口49からの第1の塗布液41の吐出を停止した状態で、第2の吐出口50からの第2の塗布液43の吐出を開始すると共に、第3の吐出口51からの第3の塗布液45の吐出を継続することにより、矢印C方向に移動する被塗布物10の表面に第2の塗布液50を第1の工程で形成した第1の下層塗膜52の端部から塗布して、第2の下層塗膜54の形成を開始すると共に、第2の下層塗膜54の表面への第3の塗布液45の塗布を継続して、第2の下層塗膜54及び上層塗膜53からなる積層部の形成を開始する。   In the third step (see FIG. 12C), the second coating liquid 43 from the second ejection port 50 is stopped in a state where the ejection of the first coating liquid 41 from the first ejection port 49 is stopped. And the discharge of the third coating liquid 45 from the third discharge port 51 is continued, whereby the second coating liquid 50 is applied to the surface of the object 10 to be moved in the direction of arrow C. The coating is applied from the end of the first lower layer coating film 52 formed in the first step to start the formation of the second lower layer coating film 54, and the third application to the surface of the second lower layer coating film 54 The application of the liquid 45 is continued, and the formation of the laminated portion composed of the second lower layer coating film 54 and the upper layer coating film 53 is started.

又、上層塗膜53及び第2の下層塗膜54の積層部から上層塗膜53及び第1の下層塗膜52の積層部にかけて上層塗膜28を途切れることなく形成するには、第4の工程〔図13(a)参照〕において、第1の吐出口49からの第1の塗布液41の吐出を停止した状態で、第2の吐出口50から第2の塗布液43を、第3の吐出口51から第3の塗布液45をそれぞれ吐出することにより、第2の塗布液43を矢印C方向に移動する被塗布物10の表面に塗布して第2の下層塗膜54を形成すると共に、第3の塗布液45を矢印C方向に移動する第2の下層塗膜54の表面に塗布して上層塗膜53を形成することにより、第2の下層塗膜54及び上層塗膜53からなる積層部を形成する。   In order to form the upper layer coating film 28 without interruption from the layered portion of the upper layer coating film 53 and the second lower layer coating film 54 to the layered portion of the upper layer coating film 53 and the first lower layer coating film 52, In the step (see FIG. 13A), the second coating liquid 43 is dispensed from the second ejection port 50 in the state where the ejection of the first coating liquid 41 from the first ejection port 49 is stopped. The second coating liquid 43 is applied to the surface of the object 10 to be moved in the direction of the arrow C to form the second lower coating film 54 by discharging the third coating liquid 45 from the discharge ports 51 respectively. At the same time, the second lower coating film 54 and the upper coating film are formed by applying the third coating liquid 45 to the surface of the second lower coating film 54 moving in the direction of arrow C to form the upper coating film 53. 53 is formed.

第5の工程〔図13(b)参照〕において、第2の吐出口50からの第2の塗布液43の吐出及び第3の吐出口51からの第3の塗布液45の吐出を継続した状態で、第1の吐出口49からの第1の塗布液41の吐出を開始することにより、第2の塗布液50を矢印C方向に移動する被塗布物10の表面に塗布して第2の下層塗膜54を形成し、第3の塗布液45を矢印C方向に移動する第2の下層塗膜54の表面に塗布して上層塗膜53を形成することにより、第2の下層塗膜54及び上層塗膜53からなる積層部を形成し続けると共に、第1の塗布液41を矢印C方向に移動する被塗布物10の表面に塗布して第1の下層塗膜52の形成を開始する。   In the fifth step (see FIG. 13B), the discharge of the second coating liquid 43 from the second discharge port 50 and the discharge of the third coating liquid 45 from the third discharge port 51 were continued. In this state, by starting the discharge of the first coating liquid 41 from the first discharge port 49, the second coating liquid 50 is applied to the surface of the object 10 to be moved in the direction of the arrow C, and the second coating liquid 50 is applied. The second lower layer coating 54 is formed by applying the third coating liquid 45 to the surface of the second lower layer coating 54 moving in the direction of arrow C to form the upper layer coating 53. While continuing to form the laminated part which consists of the film | membrane 54 and the upper layer coating film 53, the 1st coating liquid 41 is apply | coated to the surface of the to-be-coated object 10 which moves to the arrow C direction, and formation of the 1st lower layer coating film 52 is carried out. Start.

第6の工程〔図13(c)参照〕において、第1の吐出口49からの第1の塗布液41の吐出及び第3の吐出口51からの第3の塗布液45の吐出を継続した状態で、第2の吐出口50からの第2の塗布液43の吐出を停止することにより、矢印C方向に移動する被塗布物10の表面に第2の塗布液50を第5の工程で形成した第1の下層塗膜52の端部まで塗布して、第2の下層塗膜54の形成を停止すると共に、第2の下層塗膜54の表面から第1の下層塗膜52の表面にかけて第3の塗布液45の塗布を継続して、第1の下層塗膜52及び上層塗膜53からなる積層部の形成を開始する。   In the sixth step (see FIG. 13C), the discharge of the first coating liquid 41 from the first discharge port 49 and the discharge of the third coating liquid 45 from the third discharge port 51 were continued. In this state, by stopping the discharge of the second coating liquid 43 from the second discharge port 50, the second coating liquid 50 is applied to the surface of the object 10 to be moved in the direction of arrow C in the fifth step. It is applied to the end of the formed first lower layer coating film 52 to stop the formation of the second lower layer coating layer 54, and from the surface of the second lower layer coating layer 54 to the surface of the first lower layer coating layer 52 Then, the application of the third coating liquid 45 is continued, and the formation of the laminated portion composed of the first lower layer coating film 52 and the upper layer coating film 53 is started.

このように前述の塗膜形成装置において第1乃至第6の工程を減ることにより、被塗布物10の表面に上層塗膜53及び第1の下層塗膜52の積層部と上層塗膜53及び第2の下層塗膜54の積層部とを上層塗膜53が途切れることなく交互に形成することができる。   In this way, by reducing the first to sixth steps in the coating film forming apparatus described above, the upper layer coating film 53 and the laminated portion of the first lower layer coating film 52 and the upper layer coating film 53 and The laminated portion of the second lower layer coating film 54 can be alternately formed without the upper layer coating film 53 being interrupted.

なお、第1の塗布液41,第2の塗布液43或いは第3の塗布液45の塗布液の塗り始めの部分や塗り終わりの部分において、厚塗りや薄塗りがないように、より良好に塗布するためには、例えば、本発明の第1の塗布方法において説明したのと同様に、塗布装置400の塗布液の流路、例えば、第1のマニホールド55,第2のマニホールド56或いは第3のマニホールド57に連通するシリンダ30に内設したピストン31を変位させればよい(図6参照)。   It should be noted that the first coating liquid 41, the second coating liquid 43, or the third coating liquid 45 is more preferably applied so that there is no thick coating or thin coating in the coating start portion or the coating finish portion. In order to apply, for example, as described in the first application method of the present invention, the flow path of the application liquid of the application apparatus 400, for example, the first manifold 55, the second manifold 56, or the third The piston 31 provided in the cylinder 30 communicating with the manifold 57 may be displaced (see FIG. 6).

即ち、塗布液の吐出を継続するときには、ピストン31を動かさなければ〔図6(a)参照〕、一定量の塗布液が吐出口から吐出され続けて、一定の膜厚の塗膜が形成され、又、塗布液の吐出を停止するときには、ピストン31を容量V分だけ矢印D方向に引き出せば、吐出口付近に吐出される塗布液が容量V分だけ吸引されて〔図6(b)参照〕、吐出口から吐出されていた塗布液の切れが良好になり、更に、塗布液の吐出を開始するときには、ピストン31を容量V分だけ矢印E方向に押し込めば、吐出口から吐出される塗布液が容量V分だけ増量・加圧されて〔図6(c)参照〕、塗布液の供給が早く安定する。 That is, when the discharge of the coating liquid is continued, if the piston 31 is not moved (see FIG. 6A), a fixed amount of the coating liquid is continuously discharged from the discharge port, and a coating film having a fixed film thickness is formed. also when stopping the discharge of the coating solution, if pulled out of the piston 31 by volume V 1 minute in the direction of arrow D, and the coating liquid discharged in the vicinity of the discharge port is sucked by volume V 2 minutes [FIG 6 (b )], the now cut of the coating liquid that has been discharged from the discharge port is good, further, when starting the discharge of the coating solution, the piston 31 volume V only 1 minute if pushed in the direction of arrow E, discharged from the discharge port The applied coating liquid is increased and pressurized by the volume V 2 (see FIG. 6C), and the supply of the coating liquid is stabilized quickly.

又、図7に示した塗布装置300と同様に、塗布装置400に少なくとも第4の吐出口を設けると共に、第4の塗布液をタンクから第4の吐出口に供給する液供給装置を設けることにより、例えば、第1の工程或いは第5及び第6の工程において第4の塗布液を被塗布物10の表面に、第2の塗布液43を第4の塗布液の表面に、第1の塗布液41を第2の塗布液43の表面に塗布することにより、図14に示すように、被塗布物10の表面に上層塗膜53,第1の下層塗膜52及び第3の下層塗膜61の3層からなる積層部を容易に形成することができる。   Further, similarly to the coating apparatus 300 shown in FIG. 7, the coating apparatus 400 is provided with at least a fourth discharge port and a liquid supply device for supplying the fourth coating liquid from the tank to the fourth discharge port. Thus, for example, in the first step or the fifth and sixth steps, the fourth coating liquid is applied to the surface of the object 10 and the second coating liquid 43 is applied to the surface of the fourth coating liquid. By applying the coating liquid 41 to the surface of the second coating liquid 43, as shown in FIG. 14, the upper layer coating 53, the first lower layer coating 52, and the third lower layer coating are applied to the surface of the object 10 to be coated. A laminated portion including three layers of the film 61 can be easily formed.

但し、異なる複数の種類の塗布液が塗布装置400の内部で混じることなく合流するものであれば、塗布装置400には、追加する塗布液の種類の数だけの吐出口を設ける必要はなく、1つの吐出口から複数の種類の塗布液を吐出させてもよい。   However, as long as a plurality of different types of coating liquids join together without being mixed inside the coating apparatus 400, the coating apparatus 400 does not need to be provided with as many ejection openings as the number of types of coating liquid to be added. A plurality of types of coating liquids may be discharged from one discharge port.

更に、被塗布物10は可撓性の帯状体を例に説明したが、板状体であってもよい。   Furthermore, although the to-be-coated object 10 demonstrated the flexible strip | belt-shaped body as an example, a plate-shaped body may be sufficient.

次に、本発明の塗布方法について、実施例で具体的に説明する。なお、本発明は以下の実施例に限定されるものではない。   Next, the application method of the present invention will be specifically described in Examples. In addition, this invention is not limited to a following example.

(実施例1)
実施例1は、アルミナ50wt%,カルボキシルメチルセルロース5wt%及び水45wt%を混合した第1の塗布液を吐出する第1の吐出口と、カーボンブラック30wt%,カルボキシルメチルセルロース10wt%及び水60wt%を混合した第2の塗布液を吐出する第2の吐出口と、第1の塗布液を吐出する第3の吐出口とが、厚さ50μm,幅1mのPETフィルムからなる被塗布物の移動方向の上流側から順に並設され、且つ、第1の塗布液で形成した膜厚30μmの第1の塗膜のみからなる一層部を形成するために、第1の吐出口が第2及び第3の吐出口と250μmの段差をつけて、第1の塗布液で形成した第1の塗膜と第2の塗布液で形成した第2の塗膜とからなる積層部を形成するために、第2の吐出口と第3の吐出口とが同一の高さに、換言すると、第1の吐出口は被塗布物の表面との間隔が50μmとなり、第2及び第3の吐出口は被塗布物の表面との間隔が300μmとなるように設けた塗布装置によって、移動速度50m/minの被塗布物の表面に、幅0.9mの塗膜を形成する。
Example 1
In Example 1, a first discharge port for discharging a first coating liquid in which 50 wt% of alumina, 5 wt% of carboxymethyl cellulose, and 45 wt% of water are mixed, 30 wt% of carbon black, 10 wt% of carboxymethyl cellulose, and 60 wt% of water are mixed. The second discharge port for discharging the second coating liquid and the third discharge port for discharging the first coating liquid are arranged in the moving direction of the object to be coated made of a PET film having a thickness of 50 μm and a width of 1 m. In order to form a one-layer portion composed of only the first coating film having a thickness of 30 μm formed in parallel with the first coating liquid in order from the upstream side, the first discharge port has the second and third In order to form a laminated portion composed of the first coating film formed with the first coating liquid and the second coating film formed with the second coating liquid with a step of 250 μm from the discharge port, And the third outlet are at the same height, In other words, the first discharge port is provided with a coating apparatus provided such that the distance between the first discharge port and the surface of the coating object is 50 μm, and the second and third discharge ports are provided with a distance between the surface of the coating object of 300 μm. A coating film having a width of 0.9 m is formed on the surface of the object to be coated having a moving speed of 50 m / min.

そこで、本発明の第1の塗布方法において説明した工程に従って、第1の塗布液を第1の吐出口に第1の液供給装置によって、第2の塗布液を第2の吐出口に第2の液供給装置によって、第1の塗布液を第3の吐出口に第3の液供給装置によってそれぞれ被塗布物の表面に吐出させると、塗布直後の湿潤状態での膜厚が250μmになる第2の塗膜の表面に塗布直後の湿潤状態での膜厚が30μmになる第1の塗膜を積層した移動方向の長さが1.0m,幅が0.9mの積層部と、塗布直後の湿潤状態での膜厚が30μmになる第1の塗膜のみからなる移動方向の長さが0.3m,幅が0.9mの一層部とが、移動速度50m/minの被塗布物の表面に移動方向に交互に図3に示すように形成される。   Therefore, according to the steps described in the first coating method of the present invention, the first coating liquid is supplied to the first discharge port by the first liquid supply device, and the second coating liquid is supplied to the second discharge port by the second. When the first coating liquid is discharged to the surface of the object to be coated by the third liquid supply apparatus to the third discharge port by the liquid supply apparatus, the film thickness in the wet state immediately after application becomes 250 μm. A laminated portion having a moving direction length of 1.0 m and a width of 0.9 m, in which a first coating film having a thickness of 30 μm in a wet state immediately after application is laminated on the surface of the coating film 2, and a width immediately after application; The coating layer having a moving speed of 50 m / min is formed of one layer having a moving direction length of 0.3 m and a width of 0.9 m, which is composed of only the first coating film having a thickness of 30 μm in a wet state. It is formed on the surface alternately in the moving direction as shown in FIG.

この塗布方法によれば、第1の塗布液からなる第1の塗膜と第2の塗布液からなる第2の塗膜とを積層した総膜厚が280μmの積層部と、第1の塗布液からなる第1の塗膜のみの膜厚が30μmの一層部とを、何れも欠陥なく、均一に塗布することができる。   According to this coating method, a laminated portion having a total film thickness of 280 μm obtained by laminating the first coating film made of the first coating liquid and the second coating film made of the second coating liquid, and the first coating A single-layer portion having a film thickness of only 30 μm of the first coating film made of a liquid can be uniformly applied without any defects.

(実施例2)
実施例2は、カーボンブラック30wt%,カルボキシルメチルセルロース10wt%及び水60wt%を混合した第2の塗布液を吐出する第1の吐出口と、高粘度タイプのカルボキシルメチルセルロースの0.1%水溶液からなる第3の塗布液を吐出する第2の吐出口と、アルミナ50wt%,カルボキシルメチルセルロース5wt%及び水45wt%を混合した第1の塗布液を吐出する第3の吐出口とが、厚さ50μm,幅1mのPETフィルムからなる被塗布物の移動方向の上流側から順に並設され、且つ、第1の吐出口,第2の吐出口及び第3の吐出口が同一の高さ、換言すると、被塗布物の表面との間隔が300μmとなるように設けた塗布装置によって、移動速度50m/minの被塗布物の表面に、幅0.9mの塗膜を形成する。
(Example 2)
Example 2 is composed of a first discharge port for discharging a second coating liquid in which 30% by weight of carbon black, 10% by weight of carboxymethyl cellulose and 60% by weight of water are mixed, and a 0.1% aqueous solution of high viscosity type carboxymethyl cellulose. A second discharge port for discharging the third coating solution and a third discharge port for discharging the first coating solution in which 50 wt% of alumina, 5 wt% of carboxymethyl cellulose and 45 wt% of water are mixed have a thickness of 50 μm, The first discharge port, the second discharge port, and the third discharge port are arranged in parallel from the upstream side in the moving direction of the object to be coated made of a PET film having a width of 1 m, in other words, A coating film having a width of 0.9 m is formed on the surface of the coating object having a moving speed of 50 m / min by a coating apparatus provided so that the distance from the surface of the coating object is 300 μm.

そこで、本発明の第2の塗布方法において説明した工程に従って、第2の塗布液を第1の吐出口に第1の液供給装置によって、第3の塗布液を第2の吐出口に第2の液供給装置によって、第1の塗布液を第3の吐出口に第3の液供給装置によってそれぞれ被塗布物の表面に吐出させると、塗布直後の湿潤状態での膜厚が250μmになる第2の塗膜の表面に塗布直後の湿潤状態での膜厚が30μmになる第1の塗膜を積層した移動方向の長さが1.0m,幅が0.9mの積層部と、塗布直後の湿潤状態での膜厚が250μmになる第3の塗膜の表面に塗布直後の湿潤状態での膜厚が30μmになる第1の塗膜を積層した移動方向の長さが0.3m,幅が0.9mの積層部とが、移動速度50m/minの被塗布物の表面に移動方向に交互に図9に示すように形成される。   Therefore, according to the steps described in the second coating method of the present invention, the second coating liquid is supplied to the first discharge port by the first liquid supply device, and the third coating liquid is supplied to the second discharge port by the second. When the first coating liquid is discharged to the surface of the object to be coated by the third liquid supply apparatus to the third discharge port by the liquid supply apparatus, the film thickness in the wet state immediately after application becomes 250 μm. A laminated portion having a moving direction length of 1.0 m and a width of 0.9 m, in which a first coating film having a thickness of 30 μm in a wet state immediately after application is laminated on the surface of the coating film 2, and a width immediately after application; The thickness in the moving direction in which the first coating film having a thickness of 30 μm immediately after coating is laminated on the surface of the third coating film having a thickness of 250 μm in the wet state is 0.3 m. As shown in FIG. 9, the laminated part having a width of 0.9 m is alternately arranged in the movement direction on the surface of the object to be coated having a movement speed of 50 m / min. It is formed.

この塗布方法によれば、第1の塗布液からなる第1の塗膜と第2の塗布液からなる第2の塗膜とを積層した総膜厚が280μmの積層部と、第3の塗布液からなる第3の塗膜と第1の塗布液からなる第1の塗膜とを積層した総膜厚が280μmの積層部とを、何れも欠陥なく、良好に塗布することができる。   According to this coating method, a laminated portion having a total film thickness of 280 μm obtained by laminating the first coating film made of the first coating liquid and the second coating film made of the second coating liquid, and the third coating The laminated part having a total film thickness of 280 μm obtained by laminating the third coating film made of the liquid and the first coating film made of the first coating liquid can be satisfactorily applied without any defects.

なお、第1の塗膜と第3の塗膜との積層部は、乾燥すると、膜厚が22μmになる第1の塗膜の下に膜厚が0.5μmになる極薄い第3の塗膜が存在するが、実質上、第1の塗膜の膜厚が薄い部分を形成することができる。   The laminated portion of the first coating film and the third coating film, when dried, has an extremely thin third coating film with a film thickness of 0.5 μm under the first coating film with a film thickness of 22 μm. Although a film exists, a portion where the film thickness of the first coating film is substantially thin can be formed.

(比較例1)
比較例1は、カーボンブラック30wt%,カルボキシルメチルセルロース10wt%及び水60wt%を混合した第2の塗布液を吐出する第1の吐出口と、アルミナ50wt%,カルボキシルメチルセルロース5wt%及び水45wt%を混合した第1の塗布液を吐出する第2の吐出口とが、厚さ50μm,幅1mのPETフィルムからなる被塗布物の移動方向の上流側から順に並設され、且つ、第1の吐出口と第2の吐出口とが同一の高さに、換言すると、第1及び第2の吐出口は被塗布物の表面との間隔が300μmとなるように設けた従来の塗布装置によって、移動速度50m/minの被塗布物の表面に、幅0.9mの塗膜を形成する。
(Comparative Example 1)
In Comparative Example 1, a first discharge port for discharging a second coating liquid in which 30% by weight of carbon black, 10% by weight of carboxymethyl cellulose and 60% by weight of water are mixed, 50% by weight of alumina, 5% by weight of carboxymethyl cellulose, and 45% by weight of water are mixed. And the second discharge port for discharging the first coating liquid are arranged side by side in order from the upstream side in the moving direction of the coating object made of a PET film having a thickness of 50 μm and a width of 1 m, and the first discharge port And the second discharge port at the same height, in other words, the first and second discharge ports are moved at a moving speed by a conventional coating apparatus provided with a distance of 300 μm from the surface of the object to be coated. A coating film having a width of 0.9 m is formed on the surface of the object to be coated at 50 m / min.

そこで、第2の塗布液を第1の吐出口に第1の液供給装置によって、第1の塗布液を第2の吐出口に第2の液供給装置によってそれぞれ被塗布物の表面に吐出させて、第2の塗膜の表面に第1の塗膜を積層した積層部と、第1の塗膜のみからなる一層部とを形成すると、積層部は均一に塗布できるが、一層部は、吐出口と被塗布物との間隔が広すぎるため、塗膜の途切れが幅方向に生じて、均一に塗布できなかった。   Therefore, the second coating liquid is discharged to the surface of the object to be coated by the first liquid supply device to the first discharge port and the first coating liquid is discharged to the second discharge port by the second liquid supply device, respectively. Then, when a laminated part in which the first coating film is laminated on the surface of the second coating film and a single layer part made of only the first coating film are formed, the laminated part can be applied uniformly, Since the gap between the discharge port and the object to be coated was too wide, the coating film was interrupted in the width direction and could not be applied uniformly.

以上のように、本発明の塗布方法によれば、複数の塗布液を被塗布物の表面に積層、塗布して複数の塗膜を積層、形成した全体の膜厚が厚い部分と、被塗布物の表面に実質的に1つの塗膜で形成された全体の膜厚が薄い部分とに、上層塗膜を移動方向に交互に、欠陥なく、均一に形成することができる。   As described above, according to the coating method of the present invention, a plurality of coating liquids are laminated on the surface of an object to be coated, a plurality of coating films are laminated, and a portion having a thick overall film thickness is formed. It is possible to form the upper coating film in the moving direction alternately and uniformly in the moving direction on the portion having a thin overall film thickness formed substantially on the surface of the object.

本発明の塗布装置及び塗布方法によれば、従来の一様な塗膜に比べて、より複雑な構造の塗膜を容易に形成できるようになり、例えば、セラミックコンデンサ、プラズマディスプレイパネル、二次電池極板等の塗布により製造される電子デバイスの高機能化や品質向上に寄与する。   According to the coating apparatus and the coating method of the present invention, it becomes possible to easily form a coating film having a more complicated structure than a conventional uniform coating film, for example, a ceramic capacitor, a plasma display panel, a secondary This contributes to higher functionality and improved quality of electronic devices manufactured by coating battery electrode plates.

本発明の塗布装置及びこの塗布装置による塗布液の塗布方法を示す図The figure which shows the coating device of this invention, and the coating method of the coating liquid by this coating device 図1の塗布装置及びこの塗布装置による塗布液の他の塗布方法を示す図The figure which shows the coating device of FIG. 1, and the other coating method of the coating liquid by this coating device 図1の塗布装置により積層部と一層部とを被塗布物の表面に移動方向に交互に形成したときの断面図FIG. 1 is a cross-sectional view when a laminated portion and a single layer portion are alternately formed on the surface of an object to be coated in the moving direction by the coating apparatus of FIG. (a)乃至(d)は図1の塗布装置により被塗布物の表面に一層部から積層部を形成するときの工程を示す図(A) thru | or (d) is a figure which shows the process when forming a lamination | stacking part from one layer part on the surface of a to-be-coated object with the coating device of FIG. (a)乃至(d)は図1の塗布装置により被塗布物の表面に積層部から一層部を形成するときの工程を示す図(A) thru | or (d) is a figure which shows the process when forming one layer part from a lamination | stacking part on the surface of a to-be-coated object with the coating device of FIG. 図1の塗布装置の他の実施の形態及びこの塗布装置による塗布液の塗布状態を示す図The figure which shows other embodiment of the coating device of FIG. 1, and the coating state of the coating liquid by this coating device 図1の塗布装置の更に他の実施の形態を示す図The figure which shows other embodiment of the coating device of FIG. 図7の塗布装置により積層部と一層部とを被塗布物の表面に移動方向に交互に形成したときの断面図FIG. 7 is a cross-sectional view when a layered portion and a single layer portion are alternately formed on the surface of an object to be coated in the moving direction by the coating apparatus of FIG. 図10の塗布装置により積層状態の異なる積層部を被塗布物の表面に移動方向に交互に形成したときの断面図FIG. 10 is a cross-sectional view of the laminated parts having different laminated states formed alternately on the surface of the object to be applied in the moving direction by the coating apparatus of FIG. 本発明の他の実施の形態の塗布装置及びこの塗布装置による塗布液の塗布方法を示す図The figure which shows the coating device of other embodiment of this invention, and the coating method of the coating liquid by this coating device 図10の塗布装置及びこの塗布装置による塗布液の他の塗布方法を示す図The figure which shows the coating device of FIG. 10, and the other coating method of the coating liquid by this coating device (a)乃至(c)は図10の塗布装置により被塗布物の表面に第1の積層部から第2の積層部を形成するときの工程を示す図(A) thru | or (c) is a figure which shows the process when forming the 2nd lamination | stacking part from the 1st lamination | stacking part on the surface of a to-be-coated object with the coating device of FIG. (a)乃至(c)は図10の塗布装置により被塗布物の表面に第2の積層部から第1の積層部を形成するときの工程を示す図(A) thru | or (c) is a figure which shows the process at the time of forming the 1st lamination | stacking part from the 2nd lamination | stacking part on the surface of a to-be-coated object with the coating device of FIG. 本発明の他の塗布方法により第1の積層部と第2の積層部とを被塗布物の表面に移動方向に交互に形成したときの断面図Sectional drawing when the 1st lamination | stacking part and 2nd lamination | stacking part are alternately formed in the movement direction on the surface of the to-be-coated object by the other coating method of this invention. 従来の塗布装置及びこの塗布装置による塗布液の塗布方法を示す図The figure which shows the coating method of the coating liquid by the conventional coating device and this coating device 従来の他の塗布装置及びこの塗布装置による塗布液の塗布方法を示す図The figure which shows the other coating apparatus of the past, and the coating method of the coating liquid by this coating apparatus 従来の更に他の塗布装置及びこの塗布装置による塗布液の塗布方法を示す図The figure which shows the further another coating device of the past, and the coating method of the coating liquid by this coating device 図17の塗布装置により上層塗膜と下層塗膜とを形成するときの塗布液の流量の変化を示す図The figure which shows the change of the flow volume of a coating liquid when forming an upper layer coating film and a lower layer coating film with the coating device of FIG. 図17の塗布装置によって形成した上層塗膜と下層塗膜との膜厚が移動方向に連続的に変化する積層塗膜の断面図17 is a cross-sectional view of a laminated coating film in which the film thickness of the upper layer coating film and the lower layer coating film formed by the coating apparatus in FIG. 図17の塗布装置により積層部と一層部とを被塗布物の表面に移動方向に交互に形成したときの断面図FIG. 17 is a cross-sectional view when a layered portion and a single layer portion are alternately formed on the surface of an object to be coated in the moving direction by the coating apparatus of FIG.

符号の説明Explanation of symbols

300,400 塗布装置
10 被塗布物
12,14,40,42,44 タンク
13,15,41,43,45 塗布液
16,17,35,46,47,48 液供給装置
18 三方弁
19,20,21,49,50,51 吐出口
22,23,24,55,56,57 マニホールド
25,26,27,58,59,60 スリット
28,53 上層塗膜
29 下層塗膜
30 シリンダ
31 ピストン
52 第1の下層塗膜
54 第2の下層塗膜
61 第3の下層塗膜
300,400 Coating device 10 Coating object 12, 14, 40, 42, 44 Tank 13, 15, 41, 43, 45 Coating solution 16, 17, 35, 46, 47, 48 Liquid supply device 18 Three-way valve 19, 20 , 21, 49, 50, 51 Discharge port 22, 23, 24, 55, 56, 57 Manifold 25, 26, 27, 58, 59, 60 Slit 28, 53 Upper coating 29 Lower coating 30 Cylinder 31 Piston 52 1 lower coating film 54 second lower coating film 61 third lower coating film

Claims (4)

塗布装置と相対的に移動する被塗布物の表面に、上層塗膜と下層塗膜とからなる積層部と上層塗膜のみからなる一層部とを交互に設ける塗布方法において、
前記上層塗膜となる第1の塗布液を吐出する第1の吐出口と、前記下層塗膜となる第2の塗布液を吐出する第2の吐出口と、前記上層塗膜となる前記第1の塗布液を吐出する第3の吐出口とが前記被塗布物の移動する方向に沿って上流側から下流側に向かって並び、且つ、前記第1の吐出口と前記被塗布物との間隔が、前記第2の吐出口及び前記第3の吐出口と前記被塗布物との間隔よりも狭くなるように形成されている前記塗布装置により、
前記第1の吐出口から前記第1の塗布液を吐出して、前記被塗布物の表面上に前記上層塗膜のみの一層部を設ける工程以降、
前記被塗布物の表面上に所定量の前記第1の塗布液を吐出した後、前記第1の吐出口からの前記第1の塗布液の吐出を停止する工程と、
前記被塗布物の表面上に形成した前記上層塗膜の上流側の端部より、前記第2の吐出口から前記第2の塗布液を吐出して、前記被塗布物の表面上に前記下層塗膜を形成する工程と、
前記被塗布物の表面上に形成した前記上層塗膜の上流側の端部の表面上より、前記第3の吐出口から前記第1の塗布液を吐出して、前記下層塗膜の下流側の端部を覆うと共に、該下層塗膜の表面上に前記上層塗膜を形成して積層部を設ける工程と、
前記第1の吐出口から前記第1の塗布液を吐出して、前記被塗布物の表面上に前記上層塗膜のみの一層部を設ける工程と、
前記被塗布物の表面上に形成した前記上層塗膜の下流側の端部まで前記第2の吐出口から所定量の前記第2の塗布液を吐出した後、前記第2の吐出口からの前記第2の塗布液の吐出を停止する工程と、
前記被塗布物の表面上に形成した前記上層塗膜の下流側の端部の表面上まで前記第3の吐出口から前記第1の塗布液を吐出して、前記下層塗膜の上流側の端部を覆った後、前記第3の吐出口からの前記第1の塗布液の吐出を停止する工程と
を繰り返すことを特徴とする塗布方法。
In the coating method of alternately providing a laminated portion consisting of an upper layer coating film and a lower layer coating layer and a single layer portion consisting only of the upper layer coating film on the surface of the object to be moved relative to the coating apparatus,
A first discharge port that discharges the first coating liquid that becomes the upper layer coating film, a second discharge port that discharges the second coating liquid that becomes the lower layer coating film, and the first layer that becomes the upper layer coating film A third discharge port that discharges one coating liquid is aligned from the upstream side to the downstream side along the direction of movement of the coating object, and the first discharge port and the coating object By the coating apparatus formed so that the interval is narrower than the interval between the second discharge port and the third discharge port and the object to be coated,
After the step of discharging the first coating liquid from the first discharge port and providing only one layer part of the upper layer coating film on the surface of the object to be coated,
A step of stopping the discharge of the first coating liquid from the first discharge port after discharging a predetermined amount of the first coating liquid on the surface of the object to be coated;
The second coating liquid is discharged from the second discharge port from the upstream end of the upper coating film formed on the surface of the coating object, and the lower layer is formed on the surface of the coating object. Forming a coating film; and
The first coating liquid is discharged from the third discharge port from the surface of the upstream end portion of the upper layer coating film formed on the surface of the coating object, and the downstream side of the lower layer coating film And a step of forming a laminated portion by forming the upper layer coating film on the surface of the lower layer coating film,
A step of discharging the first coating liquid from the first discharge port to provide a single layer portion of only the upper coating film on the surface of the object to be coated;
After discharging a predetermined amount of the second coating liquid from the second discharge port to the downstream end of the upper layer coating film formed on the surface of the object to be coated, from the second discharge port Stopping the discharge of the second coating liquid;
The first coating liquid is discharged from the third discharge port to the surface of the downstream end portion of the upper layer coating film formed on the surface of the coating object, and the upstream side of the lower layer coating film And a step of stopping discharging of the first coating liquid from the third discharge port after covering the end portion.
塗布装置と相対的に移動する被塗布物の表面に、上層塗膜と第1の下層塗膜とからなる第1の積層部と、上層塗膜と第2の下層塗膜とからなる第2の積層部とを交互に設ける塗布方法において、
前記第1の下層塗膜となる第1の塗布液を吐出する第1の吐出口と、乾燥による膜厚の減少割合が前記第1の塗布液と異なって前記第2の下層塗膜となる第2の塗布液を吐出する第2の吐出口と、前記上層塗膜となる第3の塗布液を吐出する第3の吐出口とが、前記被塗布物の移動する方向に沿って上流側から下流側に向って並んでいる前記塗布装置により、前記第3の吐出口から前記第3の塗布液を吐出し続けながら、
前記第1の吐出口から前記第1の塗布液を吐出して、前記被塗布物の表面上に前記第1の下層塗膜を形成しつつ、該第1の下層塗膜の表面上に前記第3の塗布液からなる前記上層塗膜を形成してなる前記第1の積層部を設ける工程と、
前記被塗布物の表面上に所定量の前記第1の塗布液を吐出すると、前記第1の吐出口からの前記第1の塗布液の吐出を停止する工程と、
前記第1の下層塗膜の上流側の端部より、前記第2の吐出口から前記第2の塗布液を吐出して、前記被塗布物の表面上に前記第2の下層塗膜を形成すると共に、該第2の下層塗膜の表面上に前記第3の塗布液からなる前記上層塗膜を形成してなる前記第2の積層部を設ける工程と、
前記第2の吐出口から前記第2の塗布液を吐出しつつ、前記第1の吐出口から前記第1の塗布液を吐出する工程と、
前記第1の下層塗膜の下流側の端部まで所定量の前記第2の塗布液を吐出すると、前記第2の吐出口からの前記第2の塗布液の吐出を停止する工程と
を繰り返すことを特徴とする塗布方法。
On the surface of the object to be moved relative to the coating apparatus, a first laminated portion composed of an upper layer coating film and a first lower layer coating film, and a second layer composed of an upper layer coating film and a second lower layer coating film. In the coating method of alternately providing the laminated parts,
The first discharge port that discharges the first coating liquid to be the first lower layer coating film and the second lower layer coating film is different from the first coating liquid in the rate of decrease in film thickness due to drying. A second discharge port that discharges the second coating liquid and a third discharge port that discharges the third coating liquid serving as the upper coating film are upstream along the direction in which the coating object moves. While continuously discharging the third coating liquid from the third discharge port by the coating device arranged in the direction from the downstream side,
The first coating liquid is discharged from the first discharge port to form the first lower coating film on the surface of the object to be coated, while the first lower coating film is formed on the surface of the first lower coating film. Providing the first laminated portion formed by forming the upper layer coating film made of a third coating solution;
A step of stopping discharging of the first coating liquid from the first discharge port when a predetermined amount of the first coating liquid is discharged onto the surface of the object to be coated;
The second coating liquid is discharged from the second discharge port from the upstream end of the first lower coating film to form the second lower coating film on the surface of the object to be coated. And providing the second laminated portion formed by forming the upper coating film made of the third coating liquid on the surface of the second lower coating film,
Discharging the first coating liquid from the first discharge port while discharging the second coating liquid from the second discharge port;
Repeating the step of stopping the discharge of the second coating liquid from the second discharge port when a predetermined amount of the second coating liquid is discharged to the downstream end of the first lower layer coating film. The coating method characterized by the above-mentioned.
前記第1の塗布液と前記第2の塗布液において、乾燥による膜厚の減少割合が大きい方の塗布液は揮発性材料からなることを特徴とする請求項2に記載の塗布方法。   3. The coating method according to claim 2, wherein in the first coating liquid and the second coating liquid, the coating liquid having a larger thickness reduction ratio due to drying is made of a volatile material. 前記第1の塗布液と前記第2の塗布液とは、固形分濃度が互いに異なることを特徴とする請求項2に記載の塗布方法。   The coating method according to claim 2, wherein the first coating liquid and the second coating liquid have different solid content concentrations.
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