EP0110074B2 - Procédé pour le revêtement multiple de lés en mouvement - Google Patents

Procédé pour le revêtement multiple de lés en mouvement Download PDF

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Publication number
EP0110074B2
EP0110074B2 EP83110161A EP83110161A EP0110074B2 EP 0110074 B2 EP0110074 B2 EP 0110074B2 EP 83110161 A EP83110161 A EP 83110161A EP 83110161 A EP83110161 A EP 83110161A EP 0110074 B2 EP0110074 B2 EP 0110074B2
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EP
European Patent Office
Prior art keywords
layer
coating
layers
viscosity
web
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 - Lifetime
Application number
EP83110161A
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German (de)
English (en)
Other versions
EP0110074A2 (fr
EP0110074A3 (en
EP0110074B1 (fr
Inventor
Günther Dr. Koepke
Hans Dipl.-Ing. Frenken
Heinrich Dipl.-Ing. Bussmann
Kurt Browatzki
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Agfa Gevaert AG
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Agfa Gevaert AG
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
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Publication of EP0110074A3 publication Critical patent/EP0110074A3/de
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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
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/57—Three layers or more the last layer being a clear coat
    • B05D7/572—Three layers or more the last layer being a clear coat all layers being cured or baked together
    • B05D7/5723—Three layers or more the last layer being a clear coat all layers being cured or baked together all layers being applied simultaneously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/58—No clear coat specified
    • B05D7/582—No clear coat specified all layers being cured or baked together
    • B05D7/5823—No clear coat specified all layers being cured or baked together all layers being applied simultaneously
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2252/00—Sheets
    • B05D2252/02—Sheets of indefinite length
    • 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
    • G03C2001/7411—Beads or bead coating
    • 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
    • G03C2001/7481—Coating simultaneously multiple layers
    • 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
    • G03C2001/7492—Slide hopper for head or curtain coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/136—Coating process making radiation sensitive element

Definitions

  • the invention relates to a method for applying, in a substantially mixture-free manner, a plurality of layers to a web which is continuously guided past a coating location, using a bead-forming coating device with a sliding surface coating head.
  • a multilayer process which is important for the photographic industry is the cascade coating process, in which one or more layers flow downwards simultaneously on an inclined surface and are fed over a bead of the continuously moving web over a short distance between a coating edge and a web. Processes of this type are also referred to in the literature as bead coating processes.
  • DE-A 2 712 055 describes a method in which a lowermost layer with a low viscosity and low wet application is applied under a layer with a higher viscosity and a higher layer thickness. Any layer package can then be built up on these two lower layers. It is required that the lower two layers should be made of the same materials or materials that do not show photographic effects when mixed together. On the other hand, the mixing of these layers is consciously accepted during the pouring.
  • the viscosities of the first layer should be between 1-10 mPas and the second layer between 10-100 mPas and the layer thicknesses of the first layer should be between 2-12 micrometers, the second layer between 15-30 micrometers.
  • mixing of the two layers due to vortex formation in the meniscus is disadvantageous, which means that there are possibilities of error in the photographic layer.
  • Another limitation of the method arises from the requirement that the first and second layers should either consist of the same material or of materials that do not produce any effects photographically. With this method, speeds of up to 3.55 m per s or 210 m / min can be achieved.
  • the publication DE-A 2 820 708 refers to the disadvantages of the process according to DE-A 2 712 055 mentioned above, in particular to the fact that the layers become slightly unstable when the viscosity is very low. This instability can be avoided to a certain extent by applying a vacuum under the bead between the caster and the web, but these instabilities limit the web speed.
  • it is therefore proposed to choose a material for the lower layer which is normally highly viscous and becomes low-viscosity and thin under shear stress and thus only has the desired low viscosity in the critical coating area, namely in the area of the bead or meniscus.
  • this process requires a special choice of material for the bottom layer, which is not in any case compatible with the photographic purpose of the entire layer structure.
  • the invention has for its object to provide a method of the type mentioned, with which it is easily possible to achieve a high coating speed without the layers are mixed together or the choice of substances for the layer structure is limited and the photographically active layer package of layers, which have a high solids content and a high viscosity and thus a particularly low wet coating and shortening of Trock - opening time is made possible.
  • the object is achieved according to the invention in that an acceleration layer with a viscosity range of 1as20 mPas and a layer thickness of 2-30 ⁇ m is arranged under one or more higher-viscosity layers in such a way that the bead formation over a gap width between Sliding surface coating head and web to be coated of 100-200 ⁇ m is carried out, and that a vacuum of 1 ⁇ 8 mbar is applied under the coating bead.
  • an accelerating layer with a viscosity of 2-10 mPas, preferably of 2-3 mPas and a layer thickness of 2.5-10 ⁇ m, in particular of 2.5 ⁇ 5 ⁇ m, is selected.
  • the lower, low-viscosity, so-called acceleration layer flows between the photographically effective layer package and the coating device and takes over the connection between the layer package and the webs which are continuously guided past the coating point and are to be coated.
  • the narrow gap distance remarkably smoothes the bead into an arc at high web speeds in which no eddies are created.
  • the web is evenly wetted, but mixing of the lowest acceleration layer with the layer or layers above is avoided.
  • This type of process implementation makes it possible to use highly viscous solutions with a high solids content and thus a low layer thickness at high pouring speeds in the layer package and thus to save energy in the drying system.
  • a method which is particularly advantageous in relation to very high coating speeds is characterized in that a further low-viscosity layer is arranged as a spreading layer over the low-viscosity acceleration layer and over the higher-viscosity layer or layers.
  • This preferably has a viscosity of 1-10 mPas and a layer thickness of 5-20 ⁇ m.
  • the spreading layer which is known per se from US Pat. No. 2,932,855, covers the layer package as the uppermost layer during its formation, the coating and after the coating.
  • the combination of the acceleration layer and the spreading layer enables excellent casting quality with layer packages that otherwise cannot be cast or can only be cast at low coating speeds. Furthermore, it was surprising that when the process was used in the cascade coating process, there was no mixing of the layers and therefore there was also no fear of a deterioration in the casting quality. It was also surprising that this acceleration layer can be set so thin with regard to layer thickness and viscosity that there were no adverse consequences in the further operations, such as when the layers solidified. Furthermore, it was surprising that by using a thin, low-viscosity spreading layer, highly viscous layer packages, which tend to contract, can be spread perfectly. Above all, however, it was surprising that when using the combination of acceleration layer and spreading layer with the cascade or bead coating process, pour rates of 400 mlmin (6-7 mls) and more could be achieved.
  • the layer package running on the cascade is spread over the short distance of the bead or meniscus, i.e. the distance between the caster and the web accelerated very high and stretched in the process.
  • Very large forces act on the layer package, which at higher speeds lead to a partial tearing of the layer package or to instabilities in the layer package.
  • the first effect of the acceleration layer is that the speed of the layer package on the running surface of the cascade is greatly increased by the acceleration layer.
  • the forces that occur when the webs that move past it are absorbed by the acceleration layer, or act only with a time delay.
  • These relationships can be estimated by a calculation. This can be done, for example, with two layers, one of which has a viscosity of 500 mPas and the other of which has a viscosity of 2 mPas.
  • the thicker layer should be applied to the web with a layer thickness of 100 ⁇ m at a web speed of 330 m / min.
  • the thinner layer may be applied as a second layer with 2 ⁇ m.
  • the thicker layer When running on the cascade, the thicker layer then has a speed of 7.9 m / min with a layer thickness of 5730 ⁇ m.
  • the layer thickness of the highly viscous layer is reduced to 1809 ⁇ m, i.e. for example by a factor of 3. This means that this layer only has to be stretched by a factor of 18 in order to obtain the correct web application, whereas in the first case a stretching by a factor of 57 would have to be carried out. This high stretching then leads to the breakage of the layer
  • the coating device In the bead coating process, layer-specific and geometric requirements of the coating device must be combined. Particularly important for the bead coating process is the correct choice of the distance between the casting edge and the web and the choice of the vacuum under the bead. A small distance between the coating device and the web is necessary for the bead coating according to the prevailing method. This small distance is a prerequisite for achieving the good casting quality, as is the low vacuum that is possible and necessary. Furthermore, a certain length of the last run-off area must not be undercut in order to enable the acceleration layer to work. By choosing the small distance between the web and the pouring device, however, it is possible to freely choose the type of layer composition for the acceleration layer, i.e. any polymer solutions e.g.
  • Gelatin cellulose derivatives, polysaccharides or, in certain cases, wetting agent solutions are used.
  • the layer thickness of these solutions can advantageously be chosen so that there is no adverse influence on the layer package - in the case of photographic materials, that is, the photographically active emulsion layers
  • Fig. 1 shows a section through a cascade pourer for carrying out the bead coating process.
  • 1 consists of several blocks 13, 14, which are arranged parallel to one another, screwed together and laterally bounded by end plates and include distributor chambers 5, through which the coating liquids 7, 8, 11 via feed channels and metering device (not shown) enter the caster and rise for distribution over the caster width in the column to the outlet slots 9.1 to 9.4.
  • the coating materials 8, 11 flow downward from the outlet slots on the inclined surfaces 3 and lie over the coating materials already flowing out one step below.
  • the acceleration layer 7, which is characteristic of this method, emerges from the exit slit 9. 1, which is closest to the cast bead or meniscus 10.
  • the layer package from the exit slots 9.2 to 9.4 rests on the acceleration layer 7 during the last part of the inclined surfaces 3.
  • the spreading layer 8 is supplied from the top exit slot 9.4 above the planned layer structure from the slots 9.2 and 9.3 . It guarantees a perfectly spread position of the layer package by preventing the formation of an interface between the layer package and air.
  • acceleration layer 7, layer package 11 and spreading layer 8 bridges the meniscus (application bead) of the foundry edge 4 and is guided in such a way that only a minimal suction depth for bead 10 is generated. It is thereby achieved that the photographically effective layer package 11 lies in a sheet on the substrate to be coated and the accelerating layer 7 between the coating edge 4 and the web 1 forms only a very small bead 10, which is completely sufficient to withstand even high coating speeds to achieve a very good wetting of the web 1 on the casting roll 6.
  • the acceleration layer 7 brings about a considerable reduction in the acceleration forces which act on the layer package 11 to be applied, so that the layer package 11 can be coated on the web 1 without qualitative impairment by the acceleration forces.
  • the spreading layer 8 shields the upper side of the layer package 11 at the interfaces from the ambient air and prevents the highly viscous layers 11 from contracting and thus smoothes the surface of the web coating 2.
  • acceleration layer 7 and the spreading layer 8 require only small amounts of surface-active substances. In certain cases, these layers can also be used without surface-active substances.
  • webs with a variety of e.g. twelve or more layers can be coated with various coating materials.
  • the method of the invention can be used for coating coherent webs of paper, plastic, glass, wood and fabric.
  • the process is particularly suitable for casting photographic layer supports with photographic emulsions.
  • All conventional sheet materials can be used for the production of photographic materials, for example film sheets made of cellulose nitrate, cellulose triacetate, polyvinyl acetate, polycarbonate, polyethylene terephthalate, polystyrene and the like, as well as a wide variety of paper sheets with or without plastic coatings on their surfaces.
  • the process can be used to apply both photographic layers which contain silver halides as photosensitive compounds and those which contain photosensitive dyes or photoconductive zinc oxides and titanium dioxide.
  • the layers may also contain additives other than those known in the field of photographic layer production, e.g. Carbon black, matting agents such as silicon dioxide or polymeric development aids and the like.
  • the photographic layers can also contain various hydrophilic colloids as binders.
  • colloids are, in addition to proteins such as gelatin, cellulose derivatives, polysaccharides such as starch, sugar, dextran or agar. Synthetic polymers such as polyvinyl alcohol or polyacrylamide or mixtures of such binders can also be used.
  • the coating method of the invention is of course also applicable to the production of non-photographic layers, e.g. for the production of magnetic clay layers or other layers of paint and lacquer.
  • a coating device according to FIG. 1 was used for the bead application process.
  • the layers to be applied showed the following composition:
  • the coating speed limit was already reached at 50 m / min using a vacuum of 7 mbar. The casting quality was bad.
  • a paper web with a PE coating was used as the material to be coated
  • a coating device according to FIG. 1 was used for the bead application process.
  • the layers to be applied showed the following composition:
  • a pouring speed of 100 m / min was achieved, with a negative pressure of 6 mbar being applied.
  • the distance from the caster to the web was 175 ⁇ m.
  • the quality of the coating on the paper base with PE coating was good.
  • the pouring speed was 130 m / min at a negative pressure of 7 mbar.
  • the casting distance could be varied from 100-200 ⁇ m with good casting quality.
  • the pouring speed was 200 m / min at a negative pressure of 4 mbar and a casting distance of 175 ⁇ m.
  • the casting quality of the shift package was good.
  • a 6 layer caster was used for the bead application process.
  • the layers to be applied had the following composition:
  • the pouring rate was 100 mlmin at a negative pressure of 4 mbar and a pouring distance of 175 ⁇ m.
  • the casting quality of the shift package was good.
  • a coating device according to FIG. 1 was used as a pourer for the bead application process for a three-layer casting.
  • the coating data for the individual layers were
  • Casting speeds of v 400 m / min and more could be achieved.
  • the negative pressure applied between the foundry edge 4 and the web 1 was only 1 mbar at a distance from the pouring edge 4 to the web 1 of 175 ⁇ m.
  • Cellulose triacetate was used as the web material. The casting quality was good.
  • a coating device was used as a pourer for the wax application process for a four-layer coating.
  • the casting dates for the individual layers were:
  • a pour rate of v 400 mlmin could be achieved.
  • the vacuum applied was 1 mbar at a pourer / web distance of 175 ⁇ m.
  • Cellulose triacetate was used as the base. The casting quality was very good.
  • a caster according to FIG. 1 was used as a caster for the bead application process for a three-layer cast.
  • the casting dates of the individual layers were as follows:
  • a casting speed of v 250 m / min could be achieved.
  • the vacuum applied was 4.5 mbar at a pourer / web distance of 175 ⁇ m.
  • PE paper was used as a base.
  • the Cast quality was good. the examples listed only show part of the scope. Other web documents, larger and smaller numbers of layers and other coating materials are possible by adjusting the acceleration layer with regard to viscosity and layer thickness.
  • the spreading layer enables a further improvement in the casting quality and an increase in the coating speed; no mixing occurred between the individual layers and between the accelerating layer and the layer above.
  • the spreading layer also does not mix with the underlying photographic layer.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (4)

1. Procédé pour déposer, sensiblement sans aucun mélange, plusieurs couches sur une bande défilant en continu en regard d'une zone de revêtement, en utilisant un dispositif de revêtement qui forme un bourrelet et présente une tête de revêtement à glissement superficiel, caractérisé par le fait qu'une couche d'accélération, ayant une viscosité située dans la plage de 1 - 20 mPas et une épaisseur de couche de 2 - 30 µm, est disposée au-dessous d' une ou de plusieurs couches à plus forte viscosité ; par le fait que la formation du bourrelet est effectuée, entre la tête de revêtement à glissement superficiel et la bande à revêtir, sur une largeur d'interstice de 100 - 200 um ; et par le fait qu'une dépression de 1 - 8 mbars est exercée au-dessous du bourrelet de revêtement.
2. Procédé selon la revendication 1, caractérisé par le fait que la couche d'accélération présente une viscosité de 2 - -10 mPas, de préférence de 2 - 3 mPas, et une épaisseur de couche de 2,5 -10 µm, de préférence de 2,5 - 5 pm.
3. Procédé selon l'une des revendications précédentes, caractérisé par le fait qu'une autre couche à faible viscosité est respectivement disposée, en tant que couche de dispersion, au-dessus de la ou des couches à plus forte viscosité.
4. Procédé selon la revendication 3, caractérisé par le fait que la couche de dispersion présente une viscosité de 1 - 10 mPas et une épaisseur de couche de 5 - 20 µm.
EP83110161A 1982-10-21 1983-10-12 Procédé pour le revêtement multiple de lés en mouvement Expired - Lifetime EP0110074B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3238904 1982-10-21
DE19823238904 DE3238904A1 (de) 1982-10-21 1982-10-21 Verfahren zur mehrfachbeschichtung von bewegten bahnen

Publications (4)

Publication Number Publication Date
EP0110074A2 EP0110074A2 (fr) 1984-06-13
EP0110074A3 EP0110074A3 (en) 1985-11-13
EP0110074B1 EP0110074B1 (fr) 1988-01-07
EP0110074B2 true EP0110074B2 (fr) 1991-11-06

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ID=6176199

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EP83110161A Expired - Lifetime EP0110074B2 (fr) 1982-10-21 1983-10-12 Procédé pour le revêtement multiple de lés en mouvement

Country Status (4)

Country Link
US (1) US4572849A (fr)
EP (1) EP0110074B2 (fr)
JP (1) JPS59100434A (fr)
DE (2) DE3238904A1 (fr)

Families Citing this family (39)

* Cited by examiner, † Cited by third party
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DE3628670A1 (de) * 1986-08-23 1988-02-25 Volkmar Eigenbrod Verfahren zum kunststoffbeschichten und nach dem verfahren hergestellte beschichtung
US5128198A (en) * 1986-11-07 1992-07-07 Basf Aktiengesellschaft Production of improved preimpregnated material comprising a particulate thermoplastic polymer suitable for use in the formation of a substantially void-free fiber-reinforced composite article
US4894105A (en) * 1986-11-07 1990-01-16 Basf Aktiengesellschaft Production of improved preimpregnated material comprising a particulate thermoplastic polymer suitable for use in the formation of substantially void-free fiber-reinforced composite article
DE3717882A1 (de) * 1987-05-27 1988-12-08 Basf Ag Verfahren zum strukturfreien auftrag von dispersionen auf flexiblen traegermaterialien
JP2646251B2 (ja) * 1987-10-20 1997-08-27 富士写真フイルム株式会社 多層同時塗布方法及び装置
EP0329802B1 (fr) * 1988-02-23 1992-12-23 Fuji Photo Film Co., Ltd. Procédé pour le revêtement multicouche
DE3840753C3 (de) * 1988-12-03 1995-08-03 Ferro Kunststoffe Gmbh Verfahren zum Fließbeschichten eines Beschichtungsträgers
IT1228313B (it) * 1989-02-09 1991-06-11 Minnesota Mining & Mfg Procedimento per la stesa simultanea di piu' strati di composizioni acquose colloidali idrofile su un supporto idrofobo e materiale fotografico a piu' strati
JPH02219044A (ja) * 1989-02-21 1990-08-31 Konica Corp ハロゲン化銀カラー写真感光材料
JP2736432B2 (ja) * 1989-03-17 1998-04-02 コニカ株式会社 塗布方法
JPH0540321A (ja) * 1990-09-14 1993-02-19 Fuji Photo Film Co Ltd 磁気記録要素を有するハロゲン化銀写真感光材料
US5143758A (en) * 1991-03-28 1992-09-01 Eastman Kodak Company Coating by means of a coating hopper with coating slots where the coating composition has a low slot reynolds number
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US5310637A (en) * 1992-04-14 1994-05-10 Eastman Kodak Company Minimization of ripple by controlling gelatin concentration
US5376401A (en) * 1993-06-11 1994-12-27 Eastman Kodak Company Minimization of slide instabilities by variations in layer placement, fluid properties and flow conditions
US5728430A (en) * 1995-06-07 1998-03-17 Avery Dennison Corporation Method for multilayer coating using pressure gradient regulation
US6824828B2 (en) 1995-06-07 2004-11-30 Avery Dennison Corporation Method for forming multilayer release liners
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Also Published As

Publication number Publication date
EP0110074A2 (fr) 1984-06-13
DE3375227D1 (en) 1988-02-11
EP0110074A3 (en) 1985-11-13
DE3238904A1 (de) 1984-04-26
JPH0339294B2 (fr) 1991-06-13
US4572849A (en) 1986-02-25
JPS59100434A (ja) 1984-06-09
EP0110074B1 (fr) 1988-01-07

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