JPH0655120A - Coating apparatus - Google Patents
Coating apparatusInfo
- Publication number
- JPH0655120A JPH0655120A JP20919892A JP20919892A JPH0655120A JP H0655120 A JPH0655120 A JP H0655120A JP 20919892 A JP20919892 A JP 20919892A JP 20919892 A JP20919892 A JP 20919892A JP H0655120 A JPH0655120 A JP H0655120A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- backup roll
- vacuum device
- side plates
- bead
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/007—Slide-hopper coaters, i.e. apparatus in which the liquid or other fluent material flows freely on an inclined surface before contacting the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/06—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying two different liquids or other fluent materials, or the same liquid or other fluent material twice, to the same side of the work
Landscapes
- Coating Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、スライドホッパー型塗
布装置の改良に関し、詳しくは塗布性の向上に寄与する
減圧装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a slide hopper type coating device, and more particularly to a pressure reducing device which contributes to improvement of coating property.
【０００２】[0002]
【発明の背景】スライドホッパー型塗布装置は薄膜、多
層同時塗布でしかも高速塗布が可能な塗布装置として知
られ、特にハロゲン化銀写真感光材料の製造において
は、その特質上広く利用されている。BACKGROUND OF THE INVENTION A slide hopper type coating apparatus is known as a coating apparatus capable of high-speed thin film and multi-layer coating, and is widely used due to its characteristics particularly in the production of silver halide photographic light-sensitive materials.
【０００３】スライドホッパー型塗布装置については例
えば米国特許2,681,694号、同2,761,419号、同2,761,179
号及び英国特許837,095号に開示されている。Regarding the slide hopper type coating apparatus, for example, US Pat. Nos. 2,681,694, 2,761,419, and 2,761,179 are used.
And British Patent 837,095.
【０００４】スライドホッパーによる塗布は、スライド
面を流下した単層または多層の塗布液が塗布機エッジに
おいてビードと称するリボン状液溜まりを介してウェブ
（可撓性支持体）上に塗布するビード塗布である。The coating by the slide hopper is a bead coating in which a single-layer or multi-layer coating liquid flowing down the slide surface is coated on a web (flexible support) via a ribbon-shaped liquid pool called a bead at the edge of the coating machine. Is.
【０００５】したがって、スライドホッパー塗布におい
てはビードの安定性が塗布に対して非常に重要である。
ビードは塗布液物性、塗布速度等の塗布条件の影響を受
け易く、特に高速、薄膜塗布においてはビードは不安定
となり易い。Therefore, in slide hopper coating, bead stability is very important for coating.
The bead is easily affected by the coating conditions such as the physical properties of the coating liquid and the coating speed, and the bead tends to become unstable particularly at high speeds and thin film coating.
【０００６】このようなビードの安定性に対しては、米
国特許2,681,694号に開示されているようにビードの上
下に圧力差、具体的にはビード下部に減圧室を設けるこ
とによって、ビードを下方に引っ張り安定させる方法が
一般にとられている。For stability of the bead, the bead is lowered by providing a pressure difference above and below the bead, specifically, by providing a decompression chamber below the bead as disclosed in US Pat. No. 2,681,694. Generally, the method of pulling and stabilizing is used.
【０００７】図３はこのような減圧装置を有する一般的
なスライドホッパー型装置の１例を示す断面図である。
同図において、塗布機２のスライド面５を流れる複数の
塗布液層13,14は塗布機エッジ６と、塗布バックアップ
ロール１を抱いて送行するウェブ10との間で、リボン状
液溜まり即ちビード12を形成する。このビード12を減圧
ポンプと連結して吸引減圧されている減圧装置３により
下方に吸引することにより、ビード12の安定化をはかっ
ているのである。FIG. 3 is a sectional view showing an example of a general slide hopper type device having such a pressure reducing device.
In the figure, the plurality of coating liquid layers 13 and 14 flowing on the slide surface 5 of the coating machine 2 are ribbon-shaped liquid pools or beads between the coating machine edge 6 and the web 10 carrying the coating backup roll 1. Forming twelve. The bead 12 is stabilized by connecting the bead 12 to a decompression pump and sucking the bead 12 downward by the decompression device 3 which is decompressed by suction.
【０００８】しかしながら、この場合でもウェブに同伴
する空気の流入や、塗布以前のウェブと減圧室壁との間
の間隙より空気が流入して減圧室内に渦が発生し、ビー
ドを不安定にするという問題がある。However, even in this case, air accompanying the web flows in, or air flows in from the gap between the web before coating and the wall of the pressure reducing chamber to generate vortices in the pressure reducing chamber, which makes the bead unstable. There is a problem.
【０００９】図２（ａ）は従来の減圧装置のバックアッ
プロールと減圧装置の側壁との関係を示す説明図であ
る。同図のように減圧装置内が減圧されるとバックアッ
プロール１と減圧装置側壁31との間隙から空気が流入
し、これが減圧装置３内の空気の流れを乱し、ビードに
影響を与えて塗布層にむらを発生するのである。図２
（ｂ）にこのようなむらの例を示す。FIG. 2A is an explanatory view showing the relationship between the backup roll of the conventional pressure reducing device and the side wall of the pressure reducing device. When the inside of the decompression device is decompressed as shown in the figure, air flows in through the gap between the backup roll 1 and the decompression device side wall 31, which disturbs the air flow in the decompression device 3 and affects the bead. This causes unevenness in the layers. Figure 2
An example of such unevenness is shown in (b).
【００１０】このような問題の対策としていくつかの方
法が考えられてきているが、その１つとしては、例えば
特公昭46-16271号、特開昭59-183859号、実開昭60-1932
69号、特開昭61-11173号、英国特許1,282,044号等に開
示されている方法である。Several methods have been considered as measures against such a problem, and one of them is, for example, Japanese Patent Publication No. 46-16271, Japanese Patent Application Laid-Open No. 59-183859, and Japanese Utility Model Laid-Open No. 60-1932.
69, JP-A-61-11173, British Patent 1,282,044 and the like.
【００１１】即ち、バックアップロールとバックアップ
ロールの直下に位置する減圧室の壁との間の幅方向にロ
ールを介在させたり、減圧室を２室に分け上流側の減圧
を高くしたりする方法がある。同伴空気流れを抑制する
ためにブレードのようなものでウェブをこすらせること
は有効であるが、すり傷発生の危険がある。That is, there is a method of interposing a roll in the width direction between the backup roll and the wall of the decompression chamber located directly below the backup roll, or dividing the decompression chamber into two chambers and increasing the decompression on the upstream side. is there. It is effective to rub the web with something like a blade to suppress entrained air flow, but there is a risk of scratches.
【００１２】また、特開昭63-240964号にはビードに直
接減圧をかけるビード減圧室に大気に連結する流通手段
を設け、さらにビード減圧室の外側に吸引減圧室を接続
させた方法が開示されている。Further, JP-A-63-240964 discloses a method in which a bead decompression chamber for directly decompressing a bead is provided with a circulation means connected to the atmosphere and a suction decompression chamber is connected to the outside of the bead decompression chamber. Has been done.
【００１３】以上のような各種の手段によっても減圧室
の安定性即ちビードの安定性については、ある程度の効
果は認められるが、高速、薄膜の塗布のような厳しい条
件下では未だ十分とはいえない状況である。Although the stability of the decompression chamber, that is, the stability of the bead can be recognized to some extent by the various means described above, it is still sufficient under the severe conditions such as high speed and thin film coating. There is no situation.
【００１４】[0014]
【発明の目的】上記のような問題に対し、本発明の目的
は、高速、薄膜のような条件下でも塗布むら等のない優
れた塗布性を有する塗布装置を提供することにある。SUMMARY OF THE INVENTION With respect to the above problems, it is an object of the present invention to provide a coating apparatus having excellent coating properties such as high speed and no uneven coating even under a thin film condition.
【００１５】[0015]
【発明の構成】本発明の上記目的は、減圧装置を有する
スライドホッパー型塗布装置において、該減圧装置の側
面部とバックアップロールとの非接触なシール部の方向
が、バックアップロール側板の示す鉛直方向によってエ
アーシールされていることを特徴とするスライドホッパ
ー塗布装置により達成される。SUMMARY OF THE INVENTION It is an object of the present invention to provide a slide hopper type coating apparatus having a depressurizing device, in which a side surface of the depressurizing device and a non-contact seal portion are directed in a vertical direction indicated by a backup roll side plate. It is achieved by a slide hopper coating device characterized by being air-sealed by.
【００１６】以下、本発明について具体的に説明する。The present invention will be specifically described below.
【００１７】図１（ａ）は、本発明における減圧装置の
側壁によるシールの例を示す断面図である。本発明にお
けるバックアップロールとのシールの方向がバックアッ
プロール側板の示す鉛直方向によってエアーシールする
とは、同図にみられるように減圧装置３の側壁31がバッ
クアップロール１の側板と平行に、側板を覆うように設
けることである。さらに具体的には同図（ｂ）、
（ｃ）、（ｄ）のような状態に減圧装置側壁31を設ける
ことができる。FIG. 1A is a sectional view showing an example of sealing by the side wall of the pressure reducing device according to the present invention. In the present invention, when the direction of sealing with the backup roll is air-sealed by the vertical direction indicated by the side plate of the backup roll, the side wall 31 of the decompression device 3 covers the side plate in parallel with the side plate of the backup roll 1 as seen in FIG. Is to be provided. More specifically, FIG.
The pressure reducing device side wall 31 can be provided in the states as shown in (c) and (d).
【００１８】さらに従来の減圧装置のサクション開口部
の形状は、図４（ｂ）に示すような形である。高速、薄
膜塗布の場合ビードの安定性のためには減圧を強めるこ
とが必要であるが、減圧を強める減圧装置内の空気の流
れが乱れてくる。また減圧にするためのサクション開口
部とそうでないところの境目の位置付近で塗布むらが発
生し易かった。これに対しては同図（ａ）に示すように
減圧装置の開口部をスリット状とし、その塗布幅手方向
の大きさが塗布幅と同じかもしくはそれ以上にすること
が好ましい結果をもたらすことがわかり、本発明の減圧
装置に適用することが好ましい。Further, the shape of the suction opening of the conventional pressure reducing device is as shown in FIG. 4 (b). In the case of high speed and thin film coating, it is necessary to increase the pressure reduction in order to stabilize the beads, but the air flow in the pressure reduction device for increasing the pressure reduction is disturbed. In addition, uneven coating was likely to occur in the vicinity of the boundary between the suction opening for reducing pressure and the suction opening. In order to achieve this, it is preferable to make the opening of the pressure reducing device into a slit shape and to make the size in the application width direction equal to or larger than the application width as shown in FIG. Therefore, it is preferable to apply it to the decompression device of the present invention.
【００１９】[0019]
【実施例】以下、本発明の効果について実施例により具
体的に例証する。EXAMPLES Hereinafter, the effects of the present invention will be specifically illustrated by examples.
【００２０】実施例１ 下記塗布液を用い、図３に示すようなスライドホッパー
型塗布装置により塗布を行った。Example 1 Using the following coating solution, coating was carried out by a slide hopper type coating apparatus as shown in FIG.
【００２１】 （塗布液条件） 塗布量 粘度 下層：ハロゲン化銀含有５％ゼラチン水溶液、 55g/m2 15cp 上層：界面活性剤含有３％ゼラチン水溶液、 23g/m2 15cp （塗布条件） 支持体 ：厚さ100μmのポリエチレンテレフタレー
トベース 塗布速度 ： 130m/min 減圧度 : 50mmaq （減圧装置） 比較例 ：図２（ａ）に示すタイプ 本発明 ：図１（ｃ）に示すタイプ 尚、開口部はいずれも従来タイプを用いた結果、従来タ
イプの場合は塗布縁部に塗布むらの発生がみられたが、
本発明タイプの場合は発生がなかった。(Condition of coating liquid) Coating amount Viscosity Lower layer: 5% gelatin aqueous solution containing silver halide, 55 g / m 2 15 cp Upper layer: 3% gelatin aqueous solution containing surfactant, 23 g / m 2 15 cp (Coating conditions) Support: 100 μm thick polyethylene terephthalate base Coating speed: 130 m / min Pressure reduction degree: 50 mmaq (pressure reduction device) Comparative example: type shown in FIG. 2 (a) Invention: type shown in FIG. 1 (c) As a result of using the conventional type, in the case of the conventional type, uneven coating was found at the coating edge,
No occurrence occurred in the case of the type of the present invention.
【００２２】さらに上記本発明のタイプに開口部に図４
（ａ）のスリットタイプを用いた結果は、長尺塗布にお
いてさらに良好な結果を得ることができた。Further, in the opening of the type of the present invention described above, FIG.
The result of using the slit type of (a) was able to obtain a better result in long-length coating.
【００２３】[0023]
【発明の効果】本発明により、高速、薄膜のような条件
下でも塗布むら等のない優れた塗布性を有する塗布装置
を提供することができた。According to the present invention, it is possible to provide a coating apparatus having excellent coating properties such as coating unevenness even under conditions such as high speed and thin film.
【図１】（ａ）、（ｂ）、（ｃ）、（ｄ）本発明の減圧
装置側壁の形状を示す断面図1A, 1B, 1C, and 1D are cross-sectional views showing the shape of a side wall of a pressure reducing device according to the present invention.
【図２】（ａ）従来の減圧装置側壁とバックアップロー
ルとの関係を示す説明図 （ｂ）同むらの発生状況を示す説明図FIG. 2A is an explanatory view showing a relationship between a side wall of a conventional pressure reducing device and a backup roll. FIG. 2B is an explanatory view showing a situation of occurrence of the unevenness.
【図３】スライドホッパー塗布装置の断面図FIG. 3 is a sectional view of a slide hopper coating device.
【図４】減圧装置開口部の形状例を示す説明図FIG. 4 is an explanatory diagram showing an example of the shape of a decompression device opening.
１ バックアップロール２ スライドホッパー塗布機 ３ 減圧装置 ５ スライド面 ６ 塗布機エッジ 10 ウェブ 12 ビード 31 減圧装置側壁1 Backup roll 2 Slide hopper coating machine 3 Pressure reducing device 5 Sliding surface 6 Coating machine edge 10 Web 12 Bead 31 Side wall of pressure reducing device
Claims (1)
布装置において、該減圧装置の側面部とバックアップロ
ールとの非接触なシール部の方向が、バックアップロー
ル側板の示す鉛直方向によってエアーシールされている
ことを特徴とするスライドホッパー塗布装置。1. In a slide hopper type coating apparatus having a depressurizing device, a non-contact seal portion between a side surface of the depressurizing device and a backup roll is air-sealed by a vertical direction indicated by a side plate of the backup roll. A slide hopper coating device characterized by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20919892A JPH0655120A (en) | 1992-08-05 | 1992-08-05 | Coating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20919892A JPH0655120A (en) | 1992-08-05 | 1992-08-05 | Coating apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0655120A true JPH0655120A (en) | 1994-03-01 |
Family
ID=16568980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20919892A Pending JPH0655120A (en) | 1992-08-05 | 1992-08-05 | Coating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0655120A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102310026A (en) * | 2010-07-02 | 2012-01-11 | 三星Sdi株式会社 | Active material coating apparatus |
-
1992
- 1992-08-05 JP JP20919892A patent/JPH0655120A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102310026A (en) * | 2010-07-02 | 2012-01-11 | 三星Sdi株式会社 | Active material coating apparatus |
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