JPS5837866B2 - Coating method and equipment - Google Patents

Coating method and equipment

Info

Publication number
JPS5837866B2
JPS5837866B2 JP53146743A JP14674378A JPS5837866B2 JP S5837866 B2 JPS5837866 B2 JP S5837866B2 JP 53146743 A JP53146743 A JP 53146743A JP 14674378 A JP14674378 A JP 14674378A JP S5837866 B2 JPS5837866 B2 JP S5837866B2
Authority
JP
Japan
Prior art keywords
coating
liquid
coating liquid
curtain
film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP53146743A
Other languages
Japanese (ja)
Other versions
JPS5573365A (en
Inventor
裕治 吉村
健治 田中
健 渡辺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP53146743A priority Critical patent/JPS5837866B2/en
Publication of JPS5573365A publication Critical patent/JPS5573365A/en
Publication of JPS5837866B2 publication Critical patent/JPS5837866B2/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/005Curtain coaters

Landscapes

  • Color Printing (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Description

【発明の詳細な説明】 本発明は塗布方法及び装置に関するものであり、更に詳
細には薄膜状の塗布液を支持体に衝突せし?て塗布する
方法及び装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coating method and apparatus, and more particularly to a method and apparatus for coating a coating solution by colliding a coating liquid in the form of a thin film against a support. The present invention relates to a method and apparatus for applying the same.

薄膜状の塗布液を支持体に衝突せしめて塗布する方法の
うち、代表的なものはカーテン塗布方法である。
Among the methods of applying a thin film of coating liquid by colliding with a support, a typical method is the curtain coating method.

カーテン塗布方法は一種又は二種以上の塗布液よシ成る
自由落下カーテンを形成し、これを塗布すべき物体に衝
突せしめて、物体上に塗膜を設ける方法であり、古くか
ら家具、鉄板等の塗布に使用されて来たが、塗布品質の
向上の要請から次第に高精度の塗布が要求されるように
なり、近年に至り特公昭49−24133号、同49−
35447号公報に開示される如くカーテン塗布方法を
写真感光材料の製造のようにとくに精密さを要求される
分野に適用する試みもみられるに至っている。
The curtain coating method is a method in which a free-falling curtain made of one or more coating liquids is formed and the curtain is made to collide with the object to be coated to form a coating film on the object. However, due to the demand for improved coating quality, high-precision coating is gradually required, and in recent years, Japanese Patent Publications No. 49-24133 and No. 49-
Attempts have been made to apply the curtain coating method, as disclosed in Japanese Patent No. 35447, to fields where precision is particularly required, such as the production of photographic materials.

この特公昭49−24133号、同49−35447号
公報に開示されている方法は、スライド型或いはエクス
トルージョン型注液器より一種又は二種以上の塗布液を
2本のエッジガイドの間に供給して薄膜状の自由落下カ
ーテンを形成し、連続走行しているウエブに塗布すると
いうものである。
The method disclosed in Japanese Patent Publication Nos. 49-24133 and 49-35447 involves supplying one or more types of coating liquid between two edge guides using a slide type or extrusion type liquid injection device. This method forms a thin, free-falling curtain that is applied to a continuously running web.

ここに、2本のエッジガイドの間に塗布液を供給してい
るのは、塗布幅を規制すると共にカーテン膜を安定化す
るためである。
The reason why the coating liquid is supplied between the two edge guides is to regulate the coating width and to stabilize the curtain film.

このように、カーテン塗布方法については数多くの改良
がされているが、エッジガイドについての研究は殆ど見
られず、特公昭49−14130号公報に開示される細
いロンドや細線、或いは特開昭51−57734号公報
に開示される平板の如く固定型であるのが一般であった
As described above, many improvements have been made to the curtain coating method, but there has been almost no research on edge guides. Generally, they were of a fixed type, such as the flat plate disclosed in Japanese Patent No. 57734.

しかし左から、かかる固定型のエツヂガイドを用いて塗
布を行なう場合には、塗布液がエツヂガイドによって支
持された部分を少しでも離れると、塗布液が縮流すると
いう現象のため、第1図に断面図で示す如く、塗布液1
がウエブ2の表面に塗布されたとき塗膜のウエプ幅方向
両側縁部の厚みが中央部に比べ厚くなることが見出され
た。
However, when coating from the left using such a fixed edge guide, if the coating liquid leaves the part supported by the edge guide even a little, the coating liquid will contract. As shown in the figure, coating liquid 1
It has been found that when the coating film is applied to the surface of the web 2, the thickness of the coating film at both side edges in the width direction of the web is thicker than that at the center.

この様i現象はエツヂガイド下端とウエブとのクリアラ
ンスをほとんどゼロにした場合でも観察されている。
This phenomenon has been observed even when the clearance between the lower end of the edge guide and the web is reduced to almost zero.

かかる現象は、一般的な界面張力等による縮流以外に、
固定型のエツヂガイドを用いた場合、必然的に発生する
エツヂガイド近傍にかける塗布液の落下速度の不均一女
分布、いいかえればカーテン膜中央部における塗布液落
下速度に比してエツヂガイド近傍の塗布液落下速度が小
さい(すなわち落下運動量が小さい)という現象のため
、ウエブに付着してくる空気層を押し破ることが出来な
いまま縮流してある程度液量がたまった段階で(運動量
が増して)塗布されるためであると推定出来る。
This phenomenon occurs in addition to the general flow contraction caused by interfacial tension, etc.
When a fixed edge guide is used, an uneven distribution of the falling speed of the coating liquid applied near the edge guide inevitably occurs; in other words, the falling speed of the coating liquid near the edge guide is lower than the falling speed of the coating liquid near the center of the curtain film. Due to the phenomenon that the velocity is small (that is, the falling momentum is small), the liquid constricts without being able to break through the air layer adhering to the web, and when a certain amount of liquid has accumulated (the momentum increases), it is applied. It can be assumed that this is because of the

かかるエツヂガイドによって支持された部分を少しでも
離れると縮流するという現象は、従来の塗布方法、例え
ば前記特公昭49−35447号公報のFig10に開
示された方法によっても決して避ることは出来iい。
The phenomenon that the flow contracts when the part supported by the edge guide is even slightly removed cannot be avoided even by conventional coating methods, for example, the method disclosed in Fig. 10 of the above-mentioned Japanese Patent Publication No. 49-35447. .

なぜiら、この塗布方法というのは、第2図に示す如く
、エツヂガイド3に中空部3hを設け、カーテン膜1c
が接触する側面に沿い軸方向にスロツ}3sを設け、例
えば透明なゼラチン溶液の如き不活性の液体をエツヂガ
イド3の頂部から中空部3hに圧送し、該液を前記スロ
ット3hからカーテン膜1cの幅方向に滲出させるよう
にしたものであるが、このように液体を滲出させても塗
布液の流下方向には何ら力が加えられないため、流下速
度の分布は第2図に矢印で示される如く、中央部に比ベ
エツヂガイド3側では依然として小さく、前に述べた平
板、細いロンドと同一の速度分布を示し、塗布液1の縮
流を防止する点では何ら寄与し永いからである。
The reason for this coating method is that, as shown in FIG.
A slot 3s is provided in the axial direction along the side surface in contact with the curtain membrane 1c, and an inert liquid such as a transparent gelatin solution is forced into the hollow part 3h from the top of the edge guide 3, and the liquid is passed through the slot 3h into the curtain membrane 1c. The liquid is made to ooze out in the width direction, but even when the liquid oozes out in this way, no force is applied in the downward direction of the coating liquid, so the distribution of the flowing velocity is shown by the arrows in Figure 2. This is because, compared to the central portion, the velocity distribution on the side of the bead guide 3 is still small, showing the same velocity distribution as the flat plate and thin rond mentioned above, and does not contribute to preventing the contraction of the coating liquid 1 for a long time.

このようにウエブ表面に塗布された塗膜に局所的な厚塗
りがあると、先ず品質上問題となることはいうまでもな
く、さらに塗膜の乾燥工程にかいて塗膜の均等な乾燥固
化を計ることができたくなり、著しい場合にはいわゆる
未乾故障をひき起す原因とも々っていた。
It goes without saying that if the paint film applied to the web surface is locally thick, it will not only cause a quality problem, but also cause problems in the drying process of the paint film, such as uniform drying and solidification of the paint film. In extreme cases, this could be the cause of so-called wet failures.

本発明は従来塗布方法の有する上記欠点を除去し、局所
的な厚塗りがなく、常に均ブな塗膜厚が安定して得られ
る塗布方法を提供することを目的とする。
The object of the present invention is to eliminate the above-mentioned drawbacks of conventional coating methods, and to provide a coating method that does not cause localized thick coating and can consistently provide a uniform coating thickness.

本発明の他の目的は上記方法を実施するための装置を提
供することにある。
Another object of the invention is to provide an apparatus for carrying out the above method.

本発明のこれらの目的は、薄膜状の塗布液の両端を該塗
布液の移動方向と同一方向に噴流状に吐出された液体に
より支持することによって達成される。
These objects of the present invention are achieved by supporting both ends of a thin film of coating liquid with liquid jetted in the same direction as the moving direction of the coating liquid.

以下、添付図面に基き、本発明の実施態様について詳細
に説明を加える。
Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings.

第3図は本発明の実施態様を示すカーテン塗布装置の略
正面図であり、第2図はその側面図である。
FIG. 3 is a schematic front view of a curtain coating device showing an embodiment of the present invention, and FIG. 2 is a side view thereof.

第3図及び第4図にかいて、塗布液1はエクストルージ
ョン注液器4へ図示しiいポンプにより送り込まれ、ス
ロット4Bよりエッジガイド3,3袖に吐出される。
3 and 4, the coating liquid 1 is sent to the extrusion liquid injector 4 by a pump shown in the figure, and is discharged from the slot 4B to the edge guides 3, 3 sleeves.

エッジガイド3,3′は表面の円滑なステンレス板から
或り、一端が注液器4のスロツ}4s先端部に密着し、
他端が塗布ロール5の上面から幾分離れた位置に来る如
く設けられ、スロツ}4sから流下する塗布液1のカー
テン膜1cを幅方向から保持し、塗布幅を規制している
The edge guides 3, 3' are made of stainless steel plate with a smooth surface, and one end is in close contact with the tip of the slot 4s of the liquid injector 4.
The other end is provided at a position some distance from the upper surface of the coating roll 5, and holds the curtain film 1c of the coating liquid 1 flowing down from the slot 4s from the width direction, thereby regulating the coating width.

エッジガイド3,3′の下方には内径の小さ女パイプ6
,6′がそれぞれエッジガイド3,3′に埋設されてい
る。
Below the edge guides 3 and 3' is a small inner diameter pipe 6.
, 6' are embedded in the edge guides 3, 3', respectively.

バイプ6,6′の後端は図示し女い補助液供給タンクに
通じ、その先端側の補助液吐出孔6h,6hはカーテン
膜1cの流下方向と一致し、かつ孔中心がカーテン膜1
cの略側縁上に位置する如く設けられている。
The rear ends of the pipes 6, 6' communicate with the illustrated auxiliary liquid supply tank, and the auxiliary liquid discharge holes 6h, 6h on the tip side thereof coincide with the flow direction of the curtain membrane 1c, and the center of the hole is located in the curtain membrane 1.
It is provided so as to be located approximately on the side edge of c.

ここにパイプ6,6′に供給される補助液は、用いられ
る塗布液1の性質によ9異なるが一般的には塗布液1の
有する本来の物性を損うことのない液体であり、かつカ
ーテン膜1cの側縁を十分保持することが可能な表面張
力を有する液体であればよく、後述する如く、たとえば
塗布液1がゼラチン水溶液である場合の補助液としては
メタノール水溶液等の揮撥性溶液がとくに乾燥負荷が軽
減される点で有効であることが本発明者の実験により明
らかにされている。
The auxiliary liquid supplied to the pipes 6 and 6' varies depending on the properties of the coating liquid 1 used, but is generally a liquid that does not impair the original physical properties of the coating liquid 1, and Any liquid may be used as long as it has a surface tension that can sufficiently hold the side edges of the curtain film 1c. For example, when the coating liquid 1 is an aqueous gelatin solution, the auxiliary liquid may be a volatile aqueous solution such as a methanol aqueous solution, as described later. Experiments conducted by the present inventor have revealed that the solution is particularly effective in reducing the drying load.

次に以上の如く構成された本カーテン塗布装置の作用に
ついて説明する。
Next, the operation of the curtain coating apparatus constructed as described above will be explained.

注液器4のスロツ}4sから吐出された塗布液1はエッ
ジガイド3,3′に幅方向長さを規制されながら自由落
下カーテン膜1cとなって、塗布ロール5上を走行する
ウエブ2の面上に流下する。
The coating liquid 1 discharged from the slot 4s of the liquid injector 4 becomes a free-falling curtain film 1c while its width direction length is regulated by the edge guides 3 and 3', and falls onto the web 2 running on the coating roll 5. Flows down onto the surface.

(この例ではウエブ2の幅は塗布幅より大きくなってい
る。
(In this example, the width of the web 2 is larger than the coating width.

)このとき前記補助液がバイプ6,6′に供給され、吐
出孔6h,6’hから噴流状に吐出される。
) At this time, the auxiliary liquid is supplied to the pipes 6, 6' and is discharged in a jet form from the discharge holes 6h, 6'h.

ことに補助液の吐出量はカーテン膜1cの保持の点から
理論的には流量が多くかつ流速が大きい程好ましいが、
塗膜の乾燥負荷の点からも考慮する必要があり、実質的
には両者のバランスを実験的に求めることによシ適量が
設定される。
In particular, from the viewpoint of retaining the curtain film 1c, it is theoretically preferable for the discharge amount of the auxiliary liquid to be as large as possible and as the flow rate is high.
It is also necessary to consider the drying load of the coating film, and the appropriate amount is determined by experimentally determining the balance between the two.

以上の如く、カーテン膜1cの側縁に沿って噴流状に吐
出する補助液によってカーテン膜1cを支持しながら塗
布を行iつた場合には、塗膜厚にムラがiく、また塗布
液1の流量速度が低い場合でもカーテン膜1cが途中で
破壊することが々く安定した塗布が可能となった。
As described above, when coating is carried out while supporting the curtain film 1c with the auxiliary liquid jetted out along the side edges of the curtain film 1c, the thickness of the coating film becomes uneven, and Even when the flow rate was low, the curtain film 1c was unlikely to break midway, making stable coating possible.

このことは、エッジガイド3,3′に沿って流下する塗
布液1の流速が前記補助液によって積極的に増大される
ために、塗布液1がエッジガイド3,3′下端部からウ
エブ2の面上に至るまでに縮流することがなく、換言す
れば塗布液1の流下速度分布が幅方向に一様化されるた
めであると考えられる。
This is because the flow rate of the coating liquid 1 flowing down along the edge guides 3, 3' is actively increased by the auxiliary liquid, so that the coating liquid 1 flows from the lower end of the edge guides 3, 3' onto the web 2. This is believed to be because the flow does not contract before reaching the surface, in other words, the flow velocity distribution of the coating liquid 1 is made uniform in the width direction.

以上は本発明の一実施態様に基く説明であるが、本発明
はかかる態様に限定されるものでは永く下記の如き変更
が可能である。
Although the above description is based on one embodiment of the present invention, the present invention is not limited to this embodiment and can be modified as described below.

また、前記実施態様にむいては、エッジガイド3,3′
として表面の平滑なステンレス板を用いたが、必ずしも
これに限らず、ポリエチレン、ポリテトラフルオロエチ
レン等の撥水性表面物性をもつプラスチックやゴム等を
除くプラスチックやゴム等の部材を用いることもできる
Further, for the embodiment described above, the edge guides 3, 3'
Although a stainless steel plate with a smooth surface is used as the material, the material is not necessarily limited to this, and materials such as plastics and rubber other than those having water-repellent surface properties such as polyethylene and polytetrafluoroethylene may also be used.

また、前記実施態様にかいては、エクストルージョン型
注液器によ9自由落下カーテンを形成しているが、必ず
しもこれに限らず、米国特許第3 508947号、同
第3632374号明細書に開示されたいわゆるスライ
ド型注液器を用いることもできる。
Further, in the embodiment described above, nine free-falling curtains are formed using an extrusion-type liquid injector, but the invention is not limited to this, and is disclosed in U.S. Pat. It is also possible to use a so-called slide type liquid injector.

更に、前記実施態様においては、カーテン塗布方法を用
いているが、必ずしもカーテン塗布方法に限定されるこ
となく、特願昭52−31351号第2図に開示されて
いるような薄膜状の塗布液を塗布すべきウエブに衝突せ
しめて塗布する方法一般にも適用することができる。
Further, in the above embodiment, a curtain coating method is used, but the method is not necessarily limited to the curtain coating method, and a thin film coating liquid as disclosed in FIG. It can also be applied to a general method of coating by colliding with the web to be coated.

また、自由落下カーテンに供給する塗布液は一種に限ら
ず、二種以上の塗布液を重畳関係をもって供給してもよ
い。
Moreover, the coating liquid to be supplied to the free-falling curtain is not limited to one type, and two or more types of coating liquids may be supplied in a superimposed relationship.

本発明にかいて用いられる塗布液は格別限定されないが
、写真感光材料、磁気記録材料、感圧複写紙の製造にと
くに好適に適用しうる。
Although the coating liquid used in the present invention is not particularly limited, it can be particularly suitably applied to the production of photographic light-sensitive materials, magnetic recording materials, and pressure-sensitive copying paper.

本発明を写真感光材料の製造に用いる場合、写真用塗布
液の製法、組成、必要な添加剤、ウエプの材質、各種の
処理等は、特公昭49−14130号、同49−241
33号、同49−35447号に開示されたものが全て
利用することが出来る。
When the present invention is used in the production of photographic light-sensitive materials, the manufacturing method, composition, necessary additives, material of the web, various treatments, etc. of the photographic coating solution are described in Japanese Patent Publication No. 49-14130 and Japanese Patent Publication No. 49-241.
All of the materials disclosed in No. 33 and No. 49-35447 can be used.

ここに写真用塗布液としては、写真乳剤の如く感光性の
ものに限らず、下塗り用塗布液、ハレーション防止用塗
布液バック層用塗布液等写真感光材料の製造に用いられ
るあらゆる塗布液が含まれる。
The photographic coating liquid here includes not only photosensitive ones such as photographic emulsions, but also all kinds of coating liquids used in the production of photographic light-sensitive materials, such as undercoat coating liquids, antihalation coating liquids, and back layer coating liquids. It will be done.

本発明を磁気記録材料の製造に用いる場合、磁気記録材
料用塗布液の製法、組成、必要な添加剤、ウエプの材質
、各種の処理等は、特願昭51−154491号明細書
に開示されたものが全て利用しうる。
When the present invention is used to manufacture magnetic recording materials, the manufacturing method, composition, necessary additives, material of the web, various treatments, etc. of the coating liquid for magnetic recording materials are disclosed in Japanese Patent Application No. 154491/1982. Everything is available for use.

ここに、磁気記録材料用塗布液としては、磁性塗布液、
バツクコート用塗布液等磁気記録材料の製造に用いられ
るあらゆる塗布液が含まれる。
Here, as the coating liquid for magnetic recording material, magnetic coating liquid,
It includes all coating liquids used in the production of magnetic recording materials, such as coating liquids for back coats.

また本発明に係る塗布方法を磁気記録材料の製造に適用
する場合には、塗布液より成る薄膜部に配向装置を設け
て配向性を向上せしめると共に塗布液より戒る薄膜の安
定性を向上させる等磁性塗布液、磁気記録材料に特有な
実施条件を設定する必要があるが、これについては、特
願昭51−96675号明細書に開示されたものが全て
利用しうる。
In addition, when the coating method according to the present invention is applied to the production of magnetic recording materials, an orientation device is provided in the thin film portion made of the coating liquid to improve the orientation and to improve the stability of the thin film, which is better than the coating liquid. Although it is necessary to set specific implementation conditions for the homomagnetic coating liquid and the magnetic recording material, all of the conditions disclosed in Japanese Patent Application No. 51-96675 can be used for this purpose.

本発明を感圧複写紙の製造に用いる場合、感圧複写紙用
塗布液の製法、組成、必要な添加剤、ウエブの材質、各
種の処理等は、特願昭51−76743号明細書に開示
されたものが全て利用しうる。
When the present invention is used in the production of pressure-sensitive copying paper, the manufacturing method, composition, necessary additives, web material, various treatments, etc. of the coating liquid for pressure-sensitive copying paper can be found in Japanese Patent Application No. 76743/1983. Everything disclosed can be used.

ここに、感圧複写紙用塗布液としては、マイクロカプセ
ルを主成分とする塗布液、顕色剤を主成分とする塗布液
等感圧複写紙の製造に用いられるあらゆる塗布液が含ま
れる。
The coating liquid for pressure-sensitive copying paper includes any coating liquid used in the production of pressure-sensitive copying paper, such as a coating liquid containing microcapsules as a main component and a coating liquid containing a color developer as a main component.

また本発明に係る塗布方法を感圧複写紙の製造に適用す
る場合には、感圧複写紙用塗布液に特有な実施条件を設
定する必要があるが、これについては特願昭51−76
743号明細書に開示されたものが使用しうる。
In addition, when applying the coating method according to the present invention to the production of pressure-sensitive copying paper, it is necessary to set specific implementation conditions for the coating liquid for pressure-sensitive copying paper, but this is described in Japanese Patent Application No. 51-76.
The material disclosed in No. 743 can be used.

本発明に用いられる補助液としては、一般的には水が用
いられるが、とくにカーテン膜の十分な支持と塗膜の乾
燥負荷の軽減の両者を満足せしめる液体としては、たと
えばメタノール、エタノール等のアルコール水溶液、壕
たはたとえば酢酸エチル、酢酸プチルのごとき低級アル
キルアセテート、フロピオン酸エチル、2級ブチルアル
コール、メチルイソプチルケトン、β一エトキシエチル
アセテート、メチルセロソルブアセテート゛等の沸点が
約30℃〜150℃の低沸点有機溶媒等の揮撥性を有す
る溶液であることが好ましい。
Water is generally used as the auxiliary liquid in the present invention, but liquids that can satisfy both sufficient support of the curtain film and reduction of the drying load of the coating film include, for example, methanol, ethanol, etc. Alcohol aqueous solutions, lower alkyl acetates such as ethyl acetate, butyl acetate, ethyl propionate, secondary butyl alcohol, methyl isobutyl ketone, β-ethoxyethyl acetate, methyl cellosolve acetate, etc. have a boiling point of approximately 30°C. Preferably, the solution is a volatile solution such as a low boiling point organic solvent of ~150°C.

なか、かかる補助液は、前述した如く、用いられる塗布
液の物性、すiわち塗膜の品質を損うことのないもので
あることは言う1でもなく、従って塗布液の種類によっ
て適宜に選択されるものである。
As mentioned above, such an auxiliary liquid should not impair the physical properties of the coating liquid used, that is, the quality of the coating film, and therefore, it should be used as appropriate depending on the type of coating liquid. It is selected.

以下、本発明の効果をより一層明瞭ならしめるため、実
施例及び比較例をあげる。
Examples and comparative examples are given below in order to make the effects of the present invention even clearer.

実施例 1 第1表に示す組成及び物性を有する塗布液を第3図に示
ス如きエクストルージョン型カーテン塗布装置により、
60m/分の速度で搬送されている厚さ180μ、幅1
8cmのポリエチレンテレフタレートフイルム上に8k
/rr?(湿潤状態)の塗布量で塗布した。
Example 1 A coating solution having the composition and physical properties shown in Table 1 was coated with an extrusion type curtain coating device as shown in FIG.
Thickness 180μ, width 1 being conveyed at a speed of 60m/min
8k on 8cm polyethylene terephthalate film
/rr? (in wet condition).

ここにカーテン高さは15偲、塗布幅は15cmとし、
ステンレス板から成るエッジガイドの下方端から垂直方
向に測って約10mmの位置に、内径0. 2 rra
n,外径1m++の注液パイプを図示する如く曲設し、
このパイプから15a/分の流量をもって水を補助液と
して圧送した。
Here, the curtain height is 15cm, the application width is 15cm,
An edge guide made of stainless steel plate has an inner diameter of 0.0 mm at a position approximately 10 mm measured vertically from the lower end. 2 rra
n, a liquid injection pipe with an outer diameter of 1 m++ is bent as shown in the diagram,
Water was pumped through this pipe as an auxiliary liquid at a flow rate of 15 a/min.

塗布操作中カーテン膜の支持部を観察したところ、エッ
ジガイドを離れた部分においても塗布液の縮流は見られ
ず、またフイルムに塗布された塗膜を冷風により十分ゲ
ル化したのち通常の方法により乾燥した後その厚みを厚
み計によって測定した結果局所的な厚塗りは実質的に認
められ永かった。
When we observed the support part of the curtain film during the coating operation, we found that there was no contraction of the coating liquid even in the part away from the edge guide, and after the coating film applied to the film was sufficiently gelled with cold air, we applied the usual method. After drying, the thickness was measured using a thickness meter, and as a result, local thick coating was substantially observed and remained long.

iお本実施例において、エツヂガイド下端とウエブとの
距離dを、1〜5WrLの範囲で変化させたが縮流もみ
られず実質的な差は認められiかった。
In this example, the distance d between the lower end of the edge guide and the web was varied in the range of 1 to 5 WrL, but no contraction was observed and no substantial difference was observed.

実施例 2 前記実施例1にかいて補助液を水の代りにメタノール5
0%の水溶液を用いたところ前記実施例1の場合と同一
の結果が得られ、かつ前記実施例1と同一の方法でゲル
化乾燥させたところ塗膜の乾燥に要する時間が水の場合
に比べ平均約15%短縮されることが確認された。
Example 2 Same as Example 1, except that the auxiliary liquid was 5 methanol instead of water.
When a 0% aqueous solution was used, the same results as in Example 1 were obtained, and when gelling and drying was performed in the same manner as in Example 1, the time required to dry the coating film was longer than that in the case of water. It was confirmed that the time was reduced by about 15% on average.

比較例 前記実施例1に釦いて補助液パイプを外し、補助液の供
給をなくして塗布したところ、エッジガイド下端部で塗
布液が縮流し塗布幅側縁から内側へ約5mの範囲に所定
の塗膜厚に対し平均1.5倍(最高1.8倍)の局所的
な厚塗りが連続して発生した。
Comparative Example When the auxiliary liquid pipe was removed by pressing the button in Example 1 and the auxiliary liquid supply was removed, the coating liquid contracted at the lower end of the edge guide and spread in a predetermined range of about 5 m inward from the side edge of the coating width. Local thick coating occurred continuously, with an average thickness of 1.5 times (maximum 1.8 times) the coating thickness.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は従来塗布方法による塗膜の横断面図、第2図は
従来塗布方法の作用説明図、第3図は本発明の実施態様
を示すカーテン塗布装置の略正面図、第4図はその略側
面図である。 1:塗布液、1c:カーテン膜、2:ウエブ、3,3’
:エツジガイド、4:注液器、5:塗布ロール、6,6
’:注液パイプ。
Fig. 1 is a cross-sectional view of a coating film obtained by a conventional coating method, Fig. 2 is an explanatory diagram of the operation of the conventional coating method, Fig. 3 is a schematic front view of a curtain coating device showing an embodiment of the present invention, and Fig. 4 is a cross-sectional view of a coating film obtained by a conventional coating method. It is a schematic side view. 1: Coating liquid, 1c: Curtain film, 2: Web, 3, 3'
: Edge guide, 4: Liquid injector, 5: Application roll, 6, 6
': Liquid injection pipe.

Claims (1)

【特許請求の範囲】 1 薄膜状の少なくとも一種の塗布液を塗布すべき支持
体に衝突せしめて塗布する方法において、前記薄膜状の
塗布液の両端を該塗布液の流出方向と同一方向に噴流状
に吐出する液体によ9支持することを特徴とする塗布方
法。 2 噴射状に吐出する前記液体が揮撥性を有することを
特徴とする特許請求の範囲第1項記載の塗布方法。 3 薄膜状の少なくとも一種の塗布液を塗布すべき支持
体に衝突せしめて塗布する装置に釦いて、前記薄膜状の
塗布液の両端を支持するエッジガイドの塗布液流出側端
部に、該塗布液の流出方向と同一方向に注液孔を有し液
体を噴流状に吐出せしめる注液手段を設けたことを特徴
とする塗布装置。
[Scope of Claims] 1. A method of coating at least one coating liquid in the form of a thin film by colliding with a support to be coated, wherein both ends of the coating liquid in the form of a thin film are jetted in the same direction as the outflow direction of the coating liquid. A coating method characterized by supporting with a liquid discharged in a shape. 2. The coating method according to claim 1, wherein the liquid discharged in a jet form has volatility. 3. Press a button on the device that applies at least one type of coating liquid in the form of a thin film by colliding with the support to be coated, and apply the coating liquid to the outflow side end of the edge guide that supports both ends of the coating liquid in the form of a thin film. 1. A coating device comprising a liquid injection means that has a liquid injection hole in the same direction as a liquid outflow direction and discharges liquid in a jet form.
JP53146743A 1978-11-28 1978-11-28 Coating method and equipment Expired JPS5837866B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53146743A JPS5837866B2 (en) 1978-11-28 1978-11-28 Coating method and equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53146743A JPS5837866B2 (en) 1978-11-28 1978-11-28 Coating method and equipment

Publications (2)

Publication Number Publication Date
JPS5573365A JPS5573365A (en) 1980-06-03
JPS5837866B2 true JPS5837866B2 (en) 1983-08-19

Family

ID=15414584

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53146743A Expired JPS5837866B2 (en) 1978-11-28 1978-11-28 Coating method and equipment

Country Status (1)

Country Link
JP (1) JPS5837866B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6247366U (en) * 1985-09-12 1987-03-24

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3300150A1 (en) * 1983-01-04 1984-07-05 Agfa-Gevaert Ag, 5090 Leverkusen METHOD AND DEVICE FOR STABILIZING FREE-FALLING LIQUID CURTAINS
JPH01199668A (en) * 1988-02-01 1989-08-11 Fuji Photo Film Co Ltd Coating device
DE50209547D1 (en) 2002-09-10 2007-04-05 Ilford Imaging Ch Gmbh Method and apparatus for curtain coating a moving support
DE102006030183A1 (en) * 2006-06-30 2008-01-03 Polytype Converting S.A. Curtain coater with porous curtain guide structure, curtain guide structure for a curtain coater, and method of making the curtain guide structure
JP5292623B2 (en) * 2007-09-12 2013-09-18 ボイス パテント ゲーエムベーハー Curtain coater edge treatment equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6247366U (en) * 1985-09-12 1987-03-24

Also Published As

Publication number Publication date
JPS5573365A (en) 1980-06-03

Similar Documents

Publication Publication Date Title
US4974533A (en) Coating apparatus
JP2575579B2 (en) Slide bead coating apparatus and photographic member forming method
US4340621A (en) Method for preventing formation of a heavy liquid layer on a web at a coating start position
JPH02174965A (en) Method and device for coating to double layers
JPS5837866B2 (en) Coating method and equipment
JPH07116585A (en) Coating liquid applying method
JP2001070858A (en) Paint coater and coating method
JP5972932B2 (en) Coating apparatus and coating method
JPH04190870A (en) Coating method and apparatus
JPS5922684A (en) Coating method
JPH0321370A (en) Apparatus for altering coating width of curtain coating
US5413818A (en) Curtain coating method and apparatus utilizing checking plate for controlling liquid flow
JP3409210B2 (en) Application method
JP2004050007A (en) Coating method
JPS6322192B2 (en)
JP3125228B2 (en) Application method
JPH0661517B2 (en) Coating method and device
JP2520775B2 (en) Coating device
JPH0775696B2 (en) Slide bead coating apparatus and photographic element forming method using the same
JPH0123575Y2 (en)
JPH02277579A (en) Coating method
JPH02164480A (en) Coating method
JPS62110776A (en) Method and device for coating
JPH069673B2 (en) Application method
JPH0194976A (en) Coating method