JP2670612B2 - Multi-layer simultaneous coating method - Google Patents
Multi-layer simultaneous coating methodInfo
- Publication number
- JP2670612B2 JP2670612B2 JP63030180A JP3018088A JP2670612B2 JP 2670612 B2 JP2670612 B2 JP 2670612B2 JP 63030180 A JP63030180 A JP 63030180A JP 3018088 A JP3018088 A JP 3018088A JP 2670612 B2 JP2670612 B2 JP 2670612B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- coating
- viscosity
- shear rate
- 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.)
- Expired - Fee Related
Links
- 238000000576 coating method Methods 0.000 title claims description 50
- 239000011248 coating agent Substances 0.000 claims description 40
- 239000007788 liquid Substances 0.000 claims description 16
- 239000010410 layer Substances 0.000 description 64
- 239000011324 bead Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 13
- 239000010408 film Substances 0.000 description 6
- 108010010803 Gelatin Proteins 0.000 description 5
- 229920000159 gelatin Polymers 0.000 description 5
- 239000008273 gelatin Substances 0.000 description 5
- 235000019322 gelatine Nutrition 0.000 description 5
- 235000011852 gelatine desserts Nutrition 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- -1 silver halide Chemical class 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 2
- 238000009501 film coating Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance 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
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明はスライドホッパー装置による多層同時塗布方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multi-layer simultaneous coating method using a slide hopper device.
［従来の技術］ ウエブと通常称している長尺可撓性支持体上にスライ
ドホッパー装置を用いて多数の層を同時に塗布する例と
しては写真感光材量塗布の例が挙げられる。この方法は
スライド面上を複数の層が重畳して同時に流れ、スライ
ド端において移動するウエブと出会う点にビードを形成
し、このビードを介して該多数の塗布層をウエブ上に同
時に塗布する。この塗布方法においてはビードの安定が
非常に重要であつて、例えばビードの上下に空気圧力差
を設け下側を負圧にすることにより、ビードの安定をは
かる方法等の技術がよく使用されている。このような塗
布方法において特に多層同時塗布の場合、各塗布層の塗
布液物性、ならびに相互の関係が安定な塗布を行う為に
非常に重要である。[Prior Art] As an example of simultaneously coating a large number of layers on a long flexible support, which is usually called a web, by using a slide hopper device, an example of coating with a photographic photosensitive material can be mentioned. In this method, a plurality of layers flow simultaneously on the slide surface in superposition, a bead is formed at a point where the moving web meets at a slide end, and the multiple coating layers are simultaneously coated on the web through the bead. In this coating method, bead stability is very important, and for example, a technique such as a method for stabilizing the bead is often used by providing an air pressure difference above and below the bead to make the lower side a negative pressure. I have. In such a coating method, particularly in the case of simultaneous multi-layer coating, the physical properties of the coating liquid of each coating layer and the mutual relationship are very important for stable coating.
近時、写真感光材料は薄膜化し、しかも高速塗布の要
請が強く、このような場合、安定な塗布を行う事が益々
困難になる。Recently, there is a strong demand for thinning photographic light-sensitive materials and high-speed coating. In such a case, it becomes more difficult to perform stable coating.
従来、このような対策として最下層の低粘度化が行な
われてきた。例えば特公昭56−20534号においては、最
下層２〜12μｍの湿潤膜厚（以下hwと記す）で粘度１〜
8cpとし、次の層はhw15〜20μｍで粘度10〜100cpとする
方法が開示されている。この場合、最下層の粘度が低い
ためビード部が不安定となり、最下層と次層の間で層間
混合が起こる。Conventionally, the viscosity of the lowermost layer has been reduced as such a measure. For example, in Japanese Examined Patent Publication No. 56-20534, the lowest layer has a wet film thickness of 2 to 12 μm (hereinafter referred to as hw) and a viscosity of 1 to
A method is disclosed in which the thickness is 8 cp, the next layer has a hw of 15 to 20 μm and a viscosity of 10 to 100 cp. In this case, since the viscosity of the lowermost layer is low, the bead portion becomes unstable, and interlayer mixing occurs between the lowermost layer and the next layer.
特公昭60−12107号では、最下層の粘度が低剪断速度
（102sec-1）の時、20〜200cp、高剪断速度（105se
c-1）の時、10cp以下とする方法が開示されているが、
最下層のみの設定では層間混合を起こしてしまう事があ
る。In Japanese Examined Patent Publication No. 60-12107, when the viscosity of the lowermost layer is a low shear rate (10 2 sec -1 ), it is 20 to 200 cp and a high shear rate (10 5 se).
When c -1 ), a method of setting 10 cp or less is disclosed.
Interlayer mixing may occur if only the bottom layer is set.
特開昭56−108566号では、低剪断速度の時は最下層と
隣接層の粘度差を±10cpとして高剪断速度の時は最下層
がその隣接層より低粘度になる方法を開示している。JP-A-56-108566 discloses a method in which the viscosity difference between the lowermost layer and the adjacent layer is ± 10 cp when the shear rate is low, and the viscosity of the lowermost layer is lower than that of the adjacent layer when the shear rate is high. .
尚特開昭61−174970号では上記と同様の方法を最上層
とその隣接層にも適用する方法を開示している。Incidentally, JP-A-61-174970 discloses a method in which the same method as described above is applied to the uppermost layer and its adjacent layer.
特開昭59−100434号には、比較的高粘度の層の下側に
加速層、上側に伸展層を設けることとし、この加速層は
hw2〜30μｍの時、粘度１〜20cpとし、伸展層はhw5〜20
μｍで１〜10cpとする方法を開示している。JP-A-59-100434 discloses that an acceleration layer is provided below the relatively high-viscosity layer and an extension layer is provided above the relatively high-viscosity layer.
When hw2 ~ 30μm, viscosity is 1 ~ 20cp, extension layer is hw5 ~ 20
Disclosed is a method of setting 1 to 10 cp in μm.
以上の特許は、いずれも基本的には最下層の粘度を次
層の粘度より低くする方法であるが、薄膜塗布条件で低
粘度化することはビード形成には有利であるが、筋の発
生に対しては劣化する傾向にある。むしろ最下層粘度の
高い方が筋の発生が少ない事を見出だした。All of the above patents are basically a method of lowering the viscosity of the lowermost layer than the viscosity of the next layer, but lowering the viscosity under thin film coating conditions is advantageous for bead formation, but streaks occur. To tend to deteriorate. Rather, it was found that the higher the viscosity of the lowermost layer, the less the generation of streaks.
［発明が解決しようとする問題点］ 上記問題点に対し本発明の目的は、スライドホッパー
装置を用いて多層同時塗布を行う場合、高速、薄膜条件
においても筋故障の出難い塗布方法を提供することであ
る。[Problems to be Solved by the Invention] With respect to the above problems, an object of the present invention is to provide a coating method in which streak failure does not easily occur even at high speed and in thin film conditions when performing multi-layer simultaneous coating using a slide hopper device. That is.
［問題点を解決するための手段］ 本発明の上記目的は、スライドホッパー装置を用い
て、多数の塗布液を移動しているウエブに同時に塗布す
る多層同時塗布方法において、最下層を形成する塗布液
の粘度が、低剪断速度時には20cp以下であり、かつ該最
下層の次ぎの層を形成する塗布液の粘度より高粘度であ
り、さらに高剪断速度時にも該最下層粘度が次の層の粘
度より高くなるように、前記最下層を形成する塗布液を
調製し、塗布する事を特徴とする多層同時塗布方法によ
り達成される。[Means for Solving Problems] The above object of the present invention is to provide a bottom layer in a multi-layer simultaneous coating method in which a large number of coating liquids are simultaneously coated on a moving web using a slide hopper device. The viscosity of the liquid is 20 cp or less at a low shear rate, and is higher than the viscosity of the coating solution forming the layer next to the lowermost layer, and the viscosity of the lowermost layer is higher than that of the next layer even at a high shear rate. This can be achieved by a multi-layer simultaneous coating method, which comprises preparing and applying a coating solution for forming the lowermost layer so that the viscosity is higher than the viscosity.
尚上記方法において、最下層と次の層の化学組成が実
質的に同一であってもよい。In the above method, the chemical composition of the lowermost layer and that of the next layer may be substantially the same.
次に本発明に使用するスライドホッパー装置の概略断
面図を第１図に示す。Next, FIG. 1 shows a schematic sectional view of a slide hopper device used in the present invention.
ウエブ10は塗布バックアップロール１に抱かれて走行
し、スライドビード塗布機２のスロット４よりスライド
面５に流される塗布液と塗布機リップ部６において接触
し、該リツプ部においてリボン状液溜まりであるビード
12を形成し、このビードを介して塗布液はウエブ上に塗
布される。尚この際、減圧装置３によりビードを下方に
引っ張ることによりビードの安定を計る方法が一般に採
用されている。上記機構は一層の場合でも２層以上の場
合でも同様であって、複数のスロットより、複数の塗布
液をスライド面に流す事により、同時多層塗布を行うこ
とができる。第１図の場合は２層塗布の例であって、下
層に乳剤液14を流し、上層には保護膜液13を流して、同
時重層を行う場合の例である。尚このようなスライドビ
ード塗布においては、スライドを流下した塗布液は、ビ
ード部において半径方向の変化を受けてウエブ上に引き
上げられ薄層化する。またこの時の塗布液のせん剪断速
度はスライド面を流下する時は低く、流下に伴い、次第
に増大してビード部では高剪断速度を呈するものであ
る。The web 10 runs while being held by the coating backup roll 1, and comes into contact with the coating liquid flowing from the slot 4 of the slide bead coating machine 2 to the slide surface 5 at the coating machine lip portion 6, where the ribbon-like liquid pool is formed at the lip portion. A bead
A coating liquid is applied onto the web via the beads. At this time, a method of measuring the stability of the bead by pulling the bead downward by the pressure reducing device 3 is generally adopted. The above-described mechanism is the same in the case of a single layer or a case of two or more layers. Simultaneous multi-layer coating can be performed by flowing a plurality of coating liquids on a slide surface from a plurality of slots. The case of FIG. 1 is an example of two-layer coating, in which the emulsion liquid 14 is flown in the lower layer and the protective film liquid 13 is flown in the upper layer to perform simultaneous multi-layering. Incidentally, in such slide bead coating, the coating liquid flowing down the slide undergoes a change in the radial direction at the bead portion and is pulled up onto the web to form a thin layer. Further, the shear rate of the coating solution at this time is low when flowing down the slide surface, gradually increases with the flow down, and exhibits a high shear rate at the bead portion.
以下の実施例はこのようなスライドホッパー塗布装置
を用いて多層塗布を行った。In the following examples, multi-layer coating was performed using such a slide hopper coating device.
［実施例］ 以下実施例により本発明の効果をさらに具体的に説明
する。[Examples] The effects of the present invention will be described more specifically with reference to the following examples.
実施例 １ 最下層はハロゲン化銀粒子を含有するゼラチンハロゲ
ン化銀乳剤でhw50μｍ、上層は界面活性剤を含有するゼ
ラチン保護膜液でhw20μｍ、の２層塗布とし、低剪断速
度を102sec-1、高剪断速度を105sec-1とした。支持体は
ポリエステルベースを用い、塗布速度は80m/minで表−
１に示すごとき条件で塗布を行った。Example 1 The bottom layer was a two-layer coating consisting of a gelatin silver halide emulsion containing silver halide grains with a hw of 50 μm, and the top layer was a gelatin protective film solution containing a surfactant with a hw of 20 μm. The low shear rate was 10 2 sec − 1 , the high shear rate was 10 5 sec -1 . A polyester base is used as the support, and the coating speed is 80 m / min.
The coating was performed under the conditions as shown in 1.
表−１において上下層中の数字は粘度をcpで表す。結
果は単位幅手長さ当たりの筋故障発生本数を示す。☆は
ビード破壊を起こした。低、高はそれぞれ剪断速度を示
す。 In Table 1, the numbers in the upper and lower layers represent the viscosity in cp. The results show the number of muscle failure occurrences per unit width and length. ☆ caused bead destruction. Low and high indicate shear rate, respectively.
表−１の結果から本発明の条件NO3では安定な塗布が
行える事がわかる。From the results in Table-1, it can be seen that stable coating can be performed under the condition NO3 of the present invention.
実施例−２ ４層からなる感光材料を次のごとき構成で塗布した。
下層から第１および第３層は感色性の異なるハロゲン化
銀を含むゼラチン乳剤層、第２層はゼラチン中間層、最
上層は界面活性剤を含むゼラチン保護膜層である。Example-2 A light-sensitive material having four layers was coated in the following constitution.
The first to third layers from the bottom are gelatin emulsion layers containing silver halides having different color sensitivities, the second layer is a gelatin intermediate layer, and the uppermost layer is a gelatin protective film layer containing a surfactant.
支持体はトリアセテートベースを用い、塗布速度150m
/minとし、下記表−２に示す条件で塗布を行った。尚低
剪断速度は102（sec-1）、高剪断速度は105（sec-1）と
した。Triacetate base is used as the support, coating speed is 150m
/ min, and coating was performed under the conditions shown in Table 2 below. The low shear rate was 10 2 (sec -1 ) and the high shear rate was 10 5 (sec -1 ).
また下記条件のうち、第３層、第４層の粘度条件は同
一とした、すなはち第３層は低剪断速度では20cp、高剪
断速度では11cpである。第４層は低剪断速度20cp、高剪
断速度12cpである。Further, among the following conditions, the viscosity conditions of the third layer and the fourth layer are the same, that is, the third layer has a low shear rate of 20 cp and a high shear rate of 11 cp. The fourth layer has a low shear rate of 20 cp and a high shear rate of 12 cp.
表−２の記載方法は表−１と同じである。 The description method of Table-2 is the same as that of Table-1.
表−２の結果からも本発明の条件NO7では表−１と同
様に筋故障の少い良好な結果が得られた。Also from the results of Table-2, under the condition NO7 of the present invention, similar to Table-1, good results with less muscle failure were obtained.
この他の検討結果によれば、最上層を20cp以上とする
ことは却ってビードを不安定にする。最下層を20cp未満
にしつつ、その次層粘度を最下層より低くする事が重要
である。According to the results of other studies, setting the top layer to 20 cp or more rather makes the bead unstable. It is important to make the viscosity of the next layer lower than that of the bottom layer while keeping the bottom layer to be less than 20 cp.
［発明の効果］ 本発明により、スライドホッパー装置を用いて同時多
層塗布を行う場合、高速度、薄膜塗布条件においても安
定な塗布方法を提供することが出来た。[Advantages of the Invention] According to the present invention, when performing simultaneous multi-layer coating using a slide hopper device, a stable coating method can be provided even under high speed and thin film coating conditions.
第１図はスライドビード塗布機の概略断面図である。 1:塗布バックアップロール、 2:スライドビード塗布機、 3:減圧装置、 4:スロット、5:スライド面、 6:リップ部、10:ウエブ、 11:塗布膜、 13:保護膜液、 14:乳剤液、 FIG. 1 is a schematic sectional view of a slide bead coating machine. 1: coating backup roll, 2: slide bead coating machine, 3: pressure reducing device, 4: slot, 5: slide surface, 6: lip part, 10: web, 11: coating film, 13: protective film liquid, 14: emulsion liquid,
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭58−199074（ＪＰ，Ａ) ───────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-58-199074 (JP, A)
Claims (1)
布液を移動しているウエブに同時に塗布する多層同時塗
布方法において、最下層を形成する塗布液の粘度が、低
剪断速度時には20cp未満であり、かつ該最下層の次ぎの
層を形成する塗布液の粘度より高粘度であり、さらに高
剪断速度時にも該最下層粘度が次の層の粘度より高くな
るように、前記最下層を形成する塗布液を調製し、塗布
する事を特徴とする多層同時塗布方法。1. In a multi-layer simultaneous coating method in which a large number of coating liquids are simultaneously coated on a moving web by using a slide hopper device, the viscosity of the coating liquid forming the lowermost layer is less than 20 cp at low shear rate. And the lowermost layer is formed so that the viscosity of the coating liquid forming the layer next to the lowermost layer is higher than that of the coating liquid, and the lowermost layer viscosity is higher than the viscosity of the next layer even at a high shear rate. A multi-layer simultaneous coating method, which comprises preparing and applying a coating solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63030180A JP2670612B2 (en) | 1988-02-10 | 1988-02-10 | Multi-layer simultaneous coating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63030180A JP2670612B2 (en) | 1988-02-10 | 1988-02-10 | Multi-layer simultaneous coating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01205154A JPH01205154A (en) | 1989-08-17 |
| JP2670612B2 true JP2670612B2 (en) | 1997-10-29 |
Family
ID=12296561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63030180A Expired - Fee Related JP2670612B2 (en) | 1988-02-10 | 1988-02-10 | Multi-layer simultaneous coating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2670612B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2733882B2 (en) * | 1991-10-17 | 1998-03-30 | 富士写真フイルム株式会社 | Application method |
| JP2005267724A (en) * | 2004-03-17 | 2005-09-29 | Nippon Steel Chem Co Ltd | Manufacturing method of laminate for HDD suspension |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58199074A (en) * | 1982-05-17 | 1983-11-19 | Konishiroku Photo Ind Co Ltd | Simultaneous coating method of multiple layers |
-
1988
- 1988-02-10 JP JP63030180A patent/JP2670612B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01205154A (en) | 1989-08-17 |
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