JPS63248476A - Coating method - Google Patents
Coating methodInfo
- Publication number
- JPS63248476A JPS63248476A JP1585487A JP1585487A JPS63248476A JP S63248476 A JPS63248476 A JP S63248476A JP 1585487 A JP1585487 A JP 1585487A JP 1585487 A JP1585487 A JP 1585487A JP S63248476 A JPS63248476 A JP S63248476A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- bead
- web
- coating liquid
- carrier
- 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
- 238000000576 coating method Methods 0.000 title claims abstract description 133
- 239000011248 coating agent Substances 0.000 claims abstract description 118
- 239000011324 bead Substances 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims description 49
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 239000000839 emulsion Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- -1 silver halide Chemical class 0.000 description 6
- 239000000084 colloidal system Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 108010010803 Gelatin Proteins 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 description 1
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
- B05C5/008—Slide-hopper curtain coaters
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/02—Charge-receiving layers
- G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
- G03G5/05—Organic bonding materials; Methods for coating a substrate with a photoconductive layer; Inert supplements for use in photoconductive layers
- G03G5/0525—Coating methods
-
- 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
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photoreceptors In Electrophotography (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、スライド面に塗布液を流下させて走行する
ウェブに塗布するスライドビード塗布方法に関するもの
で、さらに詳しくは、写真感光材料等の新水性コロイド
溶液をトリアセテートベース、ポリエステルベース等の
支持体に塗布する塗布方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a slide bead coating method in which a coating liquid is applied to a running web by flowing it down a slide surface. The present invention relates to a coating method for coating a new aqueous colloid solution onto a support such as a triacetate base or a polyester base.
（技術の背景）
写真感光材料の感光組成物を合成樹脂等の支持体（ウェ
ブ）上に塗布する場合に、感光組成物の溶液を塗布液供
給装置（コーター）のスライド面に流下させながら支持
体の表面に塗布することは従来から行なわれており、例
えば、米国特許第２．６８１，２９４号明細書に記載さ
れるように、ハロゲン化銀感光乳剤である親水性コロイ
ド溶液を塗布液供給装置の傾斜面に流下させながら被塗
布体面上に塗布するスライドビード塗布方法が知られて
いる。この塗布方法では第４図に示すように塗布液供給
装置１００のスライド面１０１と支持体（ウェブ）１０
２面との間に形成させる塗布液１０３ａ、１０３ｂの架
橋（ビード）１０４によって一定の厚みに塗布するが、
このビート１０４部分の安定性を保持し、塗布の均一化
を図るために、この部分の上面側と下面側との間に例え
ばビード１０４の下部を減圧して空気圧力差を設けるこ
とが行なわれている。(Technical Background) When coating a photosensitive composition of a photographic light-sensitive material onto a support (web) such as a synthetic resin, a solution of the photosensitive composition is supported while flowing down onto the sliding surface of a coating liquid supply device (coater). Coating on the surface of the body has been conventionally carried out, for example, as described in US Pat. No. 2,681,294, a hydrophilic colloid solution, which is a silver halide photosensitive emulsion, is supplied as a coating solution. A slide bead coating method is known in which the coating material is applied onto the surface of the object while flowing down the inclined surface of the device. In this coating method, as shown in FIG.
The coating is applied to a constant thickness by the crosslinking (bead) 104 of the coating liquids 103a and 103b formed between the two surfaces.
In order to maintain the stability of this bead 104 portion and to ensure uniform application, an air pressure difference is created between the upper and lower surfaces of this portion by, for example, reducing the pressure at the bottom of the bead 104. ing.
そして、塗布作業の終了または中断は、第５図に示すよ
うにウェブ１０２面への塗布液１０３ａ、１０３ｂの供
給を終Ｙまたは中断する前に塗布液供給装置１００を矢
印方向へ移動してそのスライド面１０１をウェブ１０２
から引離し、両者間のビード１０４を破壊して塗布を終
了または中断するのが一般的であった。Then, to finish or interrupt the coating operation, as shown in FIG. Slide surface 101 to web 102
It has been common practice to separate the coating from the coating and break the bead 104 between the two to terminate or interrupt the coating.
ところで、写真感光材料を製造する場合、特にハロゲン
化銀感光乳剤のような低粘度である親水性コロイド溶液
をウェブ上に塗布しており、この塗布時のビード１０４
部分における空気圧力差は塗布に対して最適な条件で加
えられているから、そのままで塗布作業を終了または中
断すると、第６図に示すように不均一に破れ、塗布液１
０３ａ、１０３ｂの一部は飛散してウェブ１０２上に付
着するおそわがある。従って、ウェブ１０２上の塗膜が
不均一に終り、塗布液が存在する部分と存在しない部分
との境界において正常塗布部分に比し、塗膜が厚くなる
場合があり、しかもこの現象は塗布幅が広くなればより
顕著となる。By the way, when manufacturing a photographic light-sensitive material, a hydrophilic colloid solution having a low viscosity such as a silver halide light-sensitive emulsion is coated on a web, and the bead 104 during this coating is coated onto a web.
Since the air pressure difference in the area is applied under the optimum conditions for coating, if the coating operation is finished or interrupted as it is, the coating will break unevenly as shown in Figure 6, and the coating liquid 1
There is a possibility that some of the particles 03a and 103b will scatter and adhere to the web 102. Therefore, the coating film on the web 102 may end up being uneven, and the coating film may become thicker at the boundary between the areas where the coating liquid is present and the areas where it is not present, compared to the normally coated area. The wider the area, the more noticeable it becomes.
この末端部１０５の厚い塗膜は、この後の乾燥工程にお
いて他の正常に塗布された部分と比較して乾燥するのに
エネルギー及び時間を要し不経済となる。更に、この厚
い塗膜部分が充分に乾燥されていないと未乾燥の塗布液
がローラ等に転写されて工程を汚す等の問題がある。ま
た、この現象は塗布幅が広い程顕著になり、このことは
塗布幅を広げることにより生産効率を上げようとする面
でも障害となる。This thick coating on the end portion 105 requires more energy and time to dry than other normally coated portions in the subsequent drying process, making it uneconomical. Furthermore, if this thick coating film portion is not sufficiently dried, there is a problem that the undried coating liquid may be transferred to a roller or the like, contaminating the process. Furthermore, this phenomenon becomes more pronounced as the coating width becomes wider, and this becomes an obstacle in efforts to increase production efficiency by widening the coating width.
従来このような問題に対し、的確且つ簡単な解決方法が
なく、塗布液物性、塗布条件等の調整がなされていたが
、これらは塗布目的に対して制約を与えることになる。Conventionally, there has been no accurate and simple solution to such problems, and adjustments have been made to the physical properties of the coating liquid, coating conditions, etc., but these impose restrictions on the purpose of coating.
この発明はかかる点に鑑みてなされたもので、簡便且つ
確実な方法で塗布終了または中断の際に生ずる塗膜の不
均一な厚膜の生成を防止する塗布方法を提供することを
目的としている。The present invention has been made in view of the above, and an object of the present invention is to provide a coating method that is simple and reliable and prevents the formation of an unevenly thick coating film that occurs when coating is completed or interrupted. .
（問題点を解決するための手段）
この発明は前記の問題点を解決するために、塗布液供給
装置のスライド面に塗布液を流下させて、連続して走行
する支持体面に塗布液を塗布する塗布方法において、前
記支持体面とステ１フ１面との間に形成される塗布液の
ビードに加えられている空気圧力差を増加させて、塗布
液供給装置のスライド面を支持体面から離隔して、塗布
を終了または中断することを特徴としている。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention allows the coating liquid to flow down the sliding surface of a coating liquid supply device, thereby applying the coating liquid to the continuously running support surface. In the coating method, the slide surface of the coating liquid supply device is separated from the support surface by increasing the air pressure difference applied to the bead of coating liquid formed between the support surface and the step 1 surface. The coating is then terminated or interrupted.
この発明塗布方法における塗布中断とは、塗布中ウェブ
の塗布故障を発見したとき、ウェブの搬送故障などによ
り長巻きウェブの中間で塗布作業を中止し、メンテナン
スを行うことである。また塗布終了とは、特定の写真材
料の塗布を完了することである。The term "interruption of coating" in the coating method of the present invention means that when a coating failure is discovered on the web during coating, the coating operation is stopped in the middle of the long web due to a web conveyance failure, etc., and maintenance is performed. Furthermore, the term "completion of coating" refers to the completion of coating of a specific photographic material.
この発明の塗布方法に用いられる塗布溶液は、種々の溶
液か用いられるが、とくに写真感光材料である親水性コ
ロイド溶液で例えばゼラチン、ポリビニールアルコール
などの親水性バインダーで、粘度４〜４０ｃｐの低粘度
の塗布組成物に好適である。The coating solution used in the coating method of the present invention may be a variety of solutions, but in particular, a hydrophilic colloid solution for photographic materials, such as a hydrophilic binder such as gelatin or polyvinyl alcohol, and a low viscosity of 4 to 40 cp. Suitable for viscous coating compositions.
また面記のような親水性コロイド溶液を塗布する支持体
くウェブ）としては、ポリエチレンテレフタレート、ト
リアセチルセルロース、ポリプロピレンなとのプラスチ
ックフィルムや紙等の写真感光材料用の支持体が用いら
れる。Further, as the support (web) to which the hydrophilic colloid solution is applied, a support for photographic light-sensitive materials such as a plastic film such as polyethylene terephthalate, triacetyl cellulose, or polypropylene or paper may be used.
この発明の塗布方法を更に図面に示す具体例に基づき説
明する。The coating method of the present invention will be further explained based on specific examples shown in the drawings.
第１図は、この発明の塗布装置の概略図である。塗布液
が塗布される支持体であるウェブ１はバックアップロー
ル２を介して高速搬送される。FIG. 1 is a schematic diagram of a coating apparatus of the present invention. A web 1, which is a support to which a coating liquid is applied, is conveyed at high speed via a backup roll 2.
このバックアップロール２に近接して塗布液供給装置３
が位置しており、その液供給路４ａ、４ｂには流量ポン
プ５ａ、５ｂの駆動で種類の異なる塗布液６ａ、６ｂが
液供給パイプ７ａ、７ｂを介して供給される。A coating liquid supply device 3 is located close to this backup roll 2.
are located, and different types of coating liquids 6a, 6b are supplied to the liquid supply paths 4a, 4b via liquid supply pipes 7a, 7b by driving flow rate pumps 5a, 5b.
液供給路４ａ、４ｂの上方には垂直の狭いスリット８ａ
、８ｂが形成されており、塗布液６ａ、６ｂがこのスリ
ット８ａ、８ｂを通り塗布液供給装置３のスライド面９
上へ流出する。このスライド面９はバックアップロール
２方向へ向い傾斜しており、流出した塗布液６ａ、６ｂ
は層をなして流下し、スライド面９の下端部からウェブ
１に塗布される。このスライド面９の下端部とウェブＩ
と間には塗布液の架橋（ビード）！０が形成される。Vertical narrow slits 8a are provided above the liquid supply channels 4a and 4b.
, 8b are formed, and the coating liquids 6a, 6b pass through these slits 8a, 8b and reach the sliding surface 9 of the coating liquid supply device 3.
flows upwards. This sliding surface 9 is inclined toward the direction of the backup roll 2, and the coating liquids 6a and 6b that flowed out are
flows down in a layer and is applied to the web 1 from the lower end of the sliding surface 9. The lower end of this sliding surface 9 and the web I
There is a bridge (bead) of coating liquid between and! 0 is formed.
前記バックアップロール２と塗布液供給装置３との間に
は負圧室１１が形成されており、ビード１０部において
ウェブ１の未塗布側を負圧にしてビード１０を引き付け
て塗布液がウェブ１に安定して塗布できるようになって
いる。負圧室１１の圧力は圧力計１２で計測されており
、この圧力は圧力調整弁１３とファン１４とにより所定
圧力に調整され、この圧力は塗膜（ｉ液の塗布中ビード
１０か安定するような条件に設定する。A negative pressure chamber 11 is formed between the backup roll 2 and the coating liquid supply device 3, and a negative pressure is applied to the non-coated side of the web 1 at the bead 10 portion to attract the bead 10 and apply the coating liquid to the web 1. It is designed to be able to be applied stably. The pressure in the negative pressure chamber 11 is measured by a pressure gauge 12, and this pressure is adjusted to a predetermined pressure by a pressure regulating valve 13 and a fan 14. Set the conditions as follows.
従って、この塗布時にはウェブ１と塗布液供給装置３の
スライド面９の下端部とが近接しており、塗布液６ａ、
６ｂがスライド面９を流下して塗布液６ａ、６ｂのビー
ド１０が形成され、これにより塗布液６ａ、６ｂが層を
なしてウェブ１上に供給塗布される。このときビード１
０部においては負圧室１１により負圧が付与されて、ウ
ェブ１゛の塗布液の未塗布側が既塗布側との間での空気
圧力差が塗布に対して最適な条件に設定され、安定した
塗布が行なわれる。Therefore, during this coating, the web 1 and the lower end of the sliding surface 9 of the coating liquid supply device 3 are close to each other, and the coating liquid 6a,
6b flows down the slide surface 9 to form beads 10 of the coating liquids 6a and 6b, whereby the coating liquids 6a and 6b are supplied and coated onto the web 1 in a layered manner. At this time, bead 1
In the 0 part, negative pressure is applied by the negative pressure chamber 11, and the air pressure difference between the uncoated side of the web 1' and the coated side is set to the optimum condition for coating, and the coating is stabilized. A suitable coating is performed.
この連続高速塗布中に塗布を中断または終了するときに
は、第２図に示すようにビード１０部分に付与する負圧
を圧力調節弁１３を操作してさらに増加し、塗布液供給
装置３を矢印へ方向へ移動してスライド面９をウェブ１
より離隔させる。すると、ビード１０部は空気圧力の増
加によって、第３図に示すように幅方向に直線上に破れ
、また塗布液の一部が飛散しても、ウェブ１上に付着す
る前に下方へ引き落す。従って、ウェブ１上の塗布液が
存在する部分と存在しない部分との境界において正常塗
布部分に比し、塗膜が厚くなることが防止される。When discontinuing or terminating the coating during this continuous high-speed coating, the negative pressure applied to the bead 10 is further increased by operating the pressure control valve 13 as shown in FIG. direction and move the slide surface 9 to the web 1
Separate them further. Then, due to the increase in air pressure, the bead 10 breaks in a straight line in the width direction as shown in FIG. drop Therefore, the coating film is prevented from becoming thicker at the boundary between the part where the coating liquid is present and the part where it is not on the web 1 compared to the normally coated part.
特に、広幅のウェブ１に塗布するときにより効果的で全
幅に亙って塗布液の飛散は見られず、確実に塗布を中断
または終了することができる。Particularly, it is more effective when coating a wide web 1, and no scattering of the coating liquid is observed over the entire width, making it possible to reliably interrupt or terminate the coating.
ビード１０部分の空気圧力差を増加させる方法としては
、ビード下部に負圧を加える方法の他にビード上部から
の加圧、又はビード上部の加圧とビード下部の減圧との
組合せ等種々な方法があるが、いずれも同様な効果が期
待できる。In addition to applying negative pressure to the lower part of the bead, there are various methods for increasing the air pressure difference between the beads 10, such as applying pressure from the upper part of the bead, or a combination of applying pressure to the upper part of the bead and reducing pressure to the lower part of the bead. However, both can be expected to have similar effects.
この空気圧力差の増加量は、通常加えられている圧力差
に１０〜１００ｍｍＡｇの範囲増加することが好ましい
が、とくに２０〜７０ ｍｍＡ ｇの範囲がよい。The amount of increase in this air pressure difference is preferably in the range of 10 to 100 mmAg over the normally applied pressure difference, and particularly preferably in the range of 20 to 70 mmAg.
また図面に示すものではウェブ１の背面にバックアップ
ロール２を接触せしめてウェブ１を搬送しているが、バ
ックアップロール２の表面に多数の小孔を設けて、この
内部より空気を拭き出し、ウェブを浮遊状態で搬送する
非接触塗布方法でも同様に行うことができる。In addition, in the drawing, the web 1 is conveyed by bringing the backup roll 2 into contact with the back surface of the web 1, but a large number of small holes are provided on the surface of the backup roll 2, and the air is wiped out from the inside to convey the web 1. A non-contact coating method in which the particles are transported in a floating state can also be used in the same manner.
（作用）
この発明では、通常の塗布時には塗布に最適な空気圧力
がビードに加えられ安定した塗布が行なわれる。この塗
布終了または中断する際、塗布液供給装置をウェブより
離すと、ビードは伸されていき遂には破壊するが、この
ウェブより塗布液供給装置を離す時、空気圧力差を増加
させることによって、ビードが圧力で均一に破壊され、
且つ塗布液がはねてウェブに付着する前に下に引き落さ
れる。(Function) In the present invention, during normal coating, the optimum air pressure for coating is applied to the bead, and stable coating is performed. When the coating liquid supply device is removed from the web when this coating is completed or interrupted, the bead stretches and eventually breaks. However, when the coating liquid supply device is removed from the web, by increasing the air pressure difference, Beads are broken uniformly by pressure,
Moreover, the coating liquid is drawn down before it splashes and adheres to the web.
（発明の効果）
この発明塗布方法において、塗布終了または中断したと
き塗布液供給装置のスライド面をウェブから引き離して
も、空気圧力差の増加によってビードの破れによる塗布
液の飛散がウェブに付着しなくなり、これによってウェ
ブの端部膜厚を一定に保つことができる。従って、乾燥
工程における乾燥エネルギー負荷を軽減でき、或いは時
間が短縮でき、また乾燥不良による搬送ローラの汚染を
防止が可能となる。(Effects of the Invention) In the coating method of the present invention, even if the sliding surface of the coating liquid supply device is pulled away from the web when coating is completed or interrupted, the coating liquid will not be scattered and adhere to the web due to bead breakage due to the increase in air pressure difference. As a result, the film thickness at the end of the web can be kept constant. Therefore, it is possible to reduce the drying energy load or shorten the drying time in the drying process, and it is also possible to prevent the conveyance roller from being contaminated due to insufficient drying.
このことは、特に生産効率向上等を目的とする塗布幅を
広くした場合に顕著な効果をもたらす。This has a remarkable effect especially when the coating width is widened for the purpose of improving production efficiency.
更に塗布末端が均一になることにより塗布収率か向上す
る。Furthermore, the coating yield is improved by making the coated end uniform.
実施例
ハロゲン化銀をゼラチン中に分散してなる写真乳剤を調
整したものを流量ポンプによりパイプを経由して塗布液
供給装置に供給する。この写真乳剤は、温度３５℃、粘
度１０ｃｐである。この写真乳剤を液供給路をへてスラ
イド面に流下せしめて、塗布速度４５ｍ／ｍｉｎで搬送
しているポリエチレンテレフタレートエステルフィルム
上に塗布する。この時スライド面とフィルムとの間の架
橋（ビード）部分でフィルムの背面に３０ ｍｍＡｇの
負圧をかける。この塗布を中断するとき、この負圧を５
５ｍｍＡｇに増加して塗布液供給装置のスライド面をフ
ィルムより引き離し、塗布を終了する。フィルムの塗布
末端部分は塗布膜厚が一定で、フィルム面での写真乳剤
の飛散は認められなく奇麗であった。EXAMPLE A photographic emulsion prepared by dispersing silver halide in gelatin is supplied to a coating liquid supply device via a pipe using a flow pump. This photographic emulsion has a temperature of 35° C. and a viscosity of 10 cp. This photographic emulsion is allowed to flow down the slide surface through the liquid supply path and is coated on a polyethylene terephthalate ester film that is being conveyed at a coating speed of 45 m/min. At this time, a negative pressure of 30 mmAg is applied to the back surface of the film at the crosslinked (bead) portion between the slide surface and the film. When discontinuing this application, this negative pressure is
The amount of Ag is increased to 5 mmAg, and the sliding surface of the coating liquid supply device is separated from the film to complete the coating. The coated end portion of the film had a constant coating thickness and was clean with no scattering of the photographic emulsion on the film surface.
一方比較例として、前記写真乳剤を全く同一の塗布条件
で塗布し、塗布の中断のとき塗布時の状態のままで、塗
布液供給装置をフィルム面より引き離した。こわにより
ビードが破れて塗布液か飛散してウェブに付若し、正常
部と比較して厚膜を生じ乾燥が十分でなくローラや周辺
を汚した。On the other hand, as a comparative example, the above-mentioned photographic emulsion was coated under exactly the same coating conditions, and when coating was interrupted, the coating liquid supply device was removed from the film surface in the same state as at the time of coating. Due to the stiffness, the bead broke and the coating liquid was scattered and attached to the web, resulting in a thick film compared to the normal area, which was not sufficiently dried and contaminated the roller and surrounding areas.
第１図はこの発明塗布方法に用いられる塗布装置の概略
図、′４２図は塗布の中断または終了時の塗布状態を示
す図、第３図は塗布液を塗布した支持体の平面図、第４
図は乃至第６図は従来方法を示すもので、第４図は通常
の塗布状態を示す図、第５図は塗布終了時における塗布
状態を示す図、第６図は塗布液を塗布した支持体の平面
図である。
図中符号１はウェブ、２はバックアップロール、３は塗
布液供給装置、６ａ、８ｂは塗布液、１０はビード、１
１は負圧室である。Fig. 1 is a schematic diagram of the coating device used in the coating method of the present invention, Fig. 42 is a diagram showing the coating state at the time of interruption or completion of coating, Fig. 3 is a plan view of the support coated with the coating solution, and Fig. 4
Figures 6 to 6 show the conventional method, with Figure 4 showing the normal coating state, Figure 5 showing the coating state at the end of coating, and Figure 6 showing the support coated with the coating liquid. It is a top view of a body. In the figure, 1 is a web, 2 is a backup roll, 3 is a coating liquid supply device, 6a and 8b are coating liquids, 10 is a bead, 1
1 is a negative pressure chamber.
Claims (1)
続して走行する支持体面に塗布液を塗布する塗布方法に
おいて、前記支持体面とスライド面との間に形成される
塗布液のビードに加えられている空気圧力差を増加させ
て、塗布液供給装置のスライド面を支持体面から離隔し
、塗布を終了または中断することを特徴とする塗布方法
。In a coating method in which a coating liquid is caused to flow down a sliding surface of a coating liquid supply device to apply the coating liquid to a continuously running support surface, a bead of the coating liquid formed between the support surface and the sliding surface is coated with the coating liquid. A coating method characterized in that the applied air pressure difference is increased to separate the sliding surface of the coating liquid supply device from the support surface to terminate or interrupt coating.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61-279505 | 1986-11-21 | ||
| JP27950586 | 1986-11-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63248476A true JPS63248476A (en) | 1988-10-14 |
Family
ID=17611980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1585487A Pending JPS63248476A (en) | 1986-11-21 | 1987-01-26 | Coating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63248476A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003508190A (en) * | 1999-09-01 | 2003-03-04 | メッツォ ペーパー インコーポレイテッド | Curtain coating device and curtain coating method |
-
1987
- 1987-01-26 JP JP1585487A patent/JPS63248476A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003508190A (en) * | 1999-09-01 | 2003-03-04 | メッツォ ペーパー インコーポレイテッド | Curtain coating device and curtain coating method |
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