WO1995031293A1 - Procede pour le revetement electrostatique d'articles non conducteurs par des vernis en poudre - Google Patents

Procede pour le revetement electrostatique d'articles non conducteurs par des vernis en poudre Download PDF

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Publication number
WO1995031293A1
WO1995031293A1 PCT/EP1995/001876 EP9501876W WO9531293A1 WO 1995031293 A1 WO1995031293 A1 WO 1995031293A1 EP 9501876 W EP9501876 W EP 9501876W WO 9531293 A1 WO9531293 A1 WO 9531293A1
Authority
WO
WIPO (PCT)
Prior art keywords
powder coating
conductive substance
layer
water
powder
Prior art date
Application number
PCT/EP1995/001876
Other languages
German (de)
English (en)
Inventor
Claudia Scheuing
Original Assignee
Karl Wörwag Lack- Und Farbenfabrik Gmbh & Co. Kg
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 Karl Wörwag Lack- Und Farbenfabrik Gmbh & Co. Kg filed Critical Karl Wörwag Lack- Und Farbenfabrik Gmbh & Co. Kg
Priority to AU26136/95A priority Critical patent/AU2613695A/en
Publication of WO1995031293A1 publication Critical patent/WO1995031293A1/fr

Links

Classifications

    • 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
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
    • B05D1/045—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field on non-conductive substrates
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/28—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material
    • C03C17/30—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material with silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions

Definitions

  • the invention relates to a method for the electrostatic coating of non-conductive objects with powder coatings.
  • powder coatings are solvent-free and therefore less harmful to the environment and health than solvent-based coatings.
  • powder coating is often more economical since, for example, such coating processes can be easily automated and excess powder can be easily recovered.
  • An important process for applying powder coatings is the so-called electrostatic powder coating.
  • the object to be coated is grounded and the electrostatically charged powder coating is applied to the object, for example using powder spray guns.
  • the lacquer layer is then produced by a reaction with the hardener present in the powder, the so-called baking or crosslinking.
  • electrostatic powder coating is nowadays a process used on an industrial scale.
  • electrostatic powder coating is problematic with non-conductive materials, especially with plastics.
  • the surface of the object to be coated must first be made conductive by suitable measures become.
  • a simple powder coating process for electrically non-conductive objects for example from the motor vehicle industry and the furniture industry, no generally applicable process has been found to date.
  • the object of the invention is therefore to provide a method which enables the electrostatic powder coating of non-conductive objects in a simple manner and thereby avoids the disadvantages known from the prior art.
  • the quality of the powder coating layers obtained should essentially correspond to that achieved in the electrostatic powder coating of conductive objects such as metals.
  • the powder coating layers should be able to be applied in a sufficient layer thickness and, in terms of appearance and durability, should meet the requirements which are set, for example, for use in the motor vehicle and furniture industries.
  • the object is provided with a closed layer (film) of a conductive substance at least on the surface areas to be coated.
  • the evaporation or evaporation temperature of the conductive substance is below the baking temperature of the powder coating.
  • the powder coating is then electrostatically applied directly to the layer made of the conductive substance and baked in a further process step.
  • the generally liquid conductive substance effects the conductivity required for the electrostatic coating and remains on the surface when the article is coated with powder coating.
  • the method according to the invention thus differs significantly from previously known methods in which it was assumed that the surface of the non-conductive object to be coated should be essentially free of liquid constituents, ie dry, when the powder coating is applied. This is shown by the drying steps provided in the known processes.
  • the invention it is possible with the invention to carry out a coating with powder coating directly on the conductive substance, ie generally on a wet object.
  • the conductive substance is removed again, since when the object is heated up there, the conductive substance with its evaporation or evaporation temperature below the actual baking temperature first passes through the non-crosslinked open-pore powder layer escapes.
  • the process according to the invention has the advantage that no additional drying steps are required before the powder coating is applied. This makes the process simpler and saves energy costs. Furthermore, it is not necessary in the invention to apply special lacquer primer layers, since the required conductivity can be achieved in a much simpler manner with the invention. Accordingly, the negative influences of such primer layers already described can also be avoided.
  • non-conductive object should be understood to mean any object whose conductivity is usually not sufficient, with it without pretreatment To coat powder coatings.
  • the invention is also applicable to objects which have a certain (measurable) conductivity, but for which this is not sufficient to carry out electrostatic powder coating with technically sufficient success.
  • conventional powder coating materials have melting or softening temperatures which are below the baking temperature (crosslinking temperature). Accordingly, it is preferred if the evaporation or evaporation temperature of the conductive substance is not significantly higher, in particular below this melting temperature, so that the hardening process of the powder coating layer is not disturbed by the evaporation or evaporation process of the conductive substance.
  • electrostatic coating with powder coatings is to be understood to mean any process in which powder layers which adhere to the objects to be coated due to electrostatic charge on the powder grains are applied.
  • the powder coating is applied directly to the layer made of the conductive substance means primarily that this layer is not dried before the powder coating is applied, as is the case with the described prior art.
  • the powder coating particles are thus applied to a “wet” object and not to a (pre) dried object, as in the prior art.
  • a certain period of time may elapse between the application of the conductive substance and the application of the powder coating, which can result, for example, from the fact that the application to be coated The object is transported from one treatment station to another.
  • the conductive substance is preferably a conductive solvent or a mixture of such solvents.
  • these compounds are the alcohols.
  • Inorganic solvents are also preferred among the solvents.
  • Water is a particularly accessible and inexpensive solvent, the use of which can also not cause any environmental or health problems. Accordingly, when water is used as the conductive substance, a closed water film is produced on the surface areas to be coated, to which the powder coating is applied directly. The wet, even the "dripping wet" object is thus coated with the powder coating. The existing water is then removed again when the powder coating is burned in due to the heating that is carried out.
  • the water can be applied to the surface of the object by simple methods such as dipping, flooding, spraying (compressed air spraying) or spraying. It is only important that a closed water layer (water film) is produced at least on the surface areas of the object to be coated.
  • the temperature of the water is basically freely selectable.
  • preheated water can, for example, offer the advantage that the water can transfer heat to the object to be coated.
  • demineralized or distilled water is used as the conductive substance. This can be either single or multiple demineralized or distilled water.
  • demineralized water for example, precludes the presence of disruptive ions on the surface of the object to be coated.
  • a particularly cost-effective and accordingly preferred method is available if tap or drinking water is used as the conductive substance.
  • the advantages of the invention already described are also evident when this water is used. Powder coating layers of perfect quality are obtained after the stoving process as in the other embodiments.
  • the use of several conductive substances in a mixture can be appropriate.
  • at least one second conductive substance can be added as an additive, which increases the residence time of the first conductive substance, in particular the water, on the surface of the object.
  • Such additives normally have a higher evaporation or evaporation temperature than the first conductive substance (e.g. water), but this is also below the baked temperature. It can be, for example, longer-chain alcohols.
  • a so-called wetting agent can be added to the conductive substance in the method according to the invention, which, by reducing the surface tension, favors the formation of the surface layer or the surface film.
  • the addition of such a wetting agent is particularly advantageous when water is used as the conductive substance. moves.
  • the wetting agent can be customary known substrate wetting agents such as, for example, polyether-modified polysiloxane.
  • the conductive substance can also contain further additives.
  • additives can be conventional defoamers, for example, which prevent foaming, for example when water is used.
  • adhesion-promoting additives for example, can be included which improve the adhesion of the powder coating subsequently applied to the surface of the non-conductive object, in particular the plastic.
  • polypropylene surfaces are flamed (with an oxidizing flame) or treated with adhesive solutions in order to improve the adhesion of powder coatings to such surfaces.
  • adhesion promoters such as chlorinated polyolefins or silanes directly in the conductive substance and in this way to ensure adequate adhesion of both the conductive substance and, in particular, the powder coating ⁇ most.
  • a further additive can also be a preservative, which can be added if the conductive substance is used several times, for example by applying it in a plunge pool, in order to protect it against bacterial attack, for example.
  • the powder coating is applied directly to the layer or film made of the conductive substance.
  • the conductive substance is removed again owing to the fact that its evaporation or evaporation temperature is below the stoving temperature of the powder coating. Surprisingly, this has no negative influence on the quality of the powder coating layer obtained. If the object coated with the powder coating is brought into the stoving oven, the object gradually warms up to the stoving temperature and when the temperature rises, the conductive substance, in particular the water, becomes loosely adhering and open-pored Powder layer evaporates or evaporates.
  • this procedure can be varied by deliberately slowly heating the object in the baking oven in order to bring about a gradual removal of the conductive substance.
  • the removal of the conductive substance can also be varied depending on other factors which influence the stoving process. Such factors are, for example, the shape and size of the objects or surfaces to be coated, the heat resistance of the objects, the thickness of the applied layer of conductive substance, in particular water, melting temperature, crosslinking temperature and layer thickness of the powder coating used, and parameters of the existing equipment conditions for burning / hardening the powder coating, such as, for example, the speed of the drying medium used, in particular the air.
  • the method according to the invention can preferably also be designed such that the layer of the conductive substance, ie in particular the water film, after the application of the powder coating before the actual baking is removed in a separate drying step.
  • the removal of the conductive substance can take place in a controlled manner and the subsequent baking step can in any case be carried out in the usual way, ie without additional procedural measures such as slow heating. Drying and baking can also be carried out in a so-called two-zone oven.
  • the mentioned additional drying step is usually carried out at temperatures which are significantly below the stoving temperature of the powder coating. This prevents the powder layer from hardening under certain circumstances. Furthermore, the temperature can preferably be selected such that it is also below the melting or softening temperature of the powder coating in order to obtain the open-pore structure of the powder layer which is favorable for the removal of the conductive substance.
  • Preferred temperatures for drying are between 60 ° C and 130 ° C, in particular between 80 ° C and 100 ° C.
  • the temperature ranges mentioned are particularly suitable for removing water as the preferred conductive substance.
  • the drying time is usually adapted to the selected drying temperature. In principle, the shorter the drying time, the higher the temperature is selected. Preferred drying times are between 5 minutes and 30 minutes, in particular between 10 minutes and 20 minutes. The times mentioned are particularly suitable for drying water as a conductive substance.
  • the method according to the invention is suitable for electrostatically coating all non-conductive objects with powder coatings.
  • non-conductive should be understood in the sense of the above definition the.
  • the method is also suitable for objects which are partly made of electrically conductive and partly made of electrically non-conductive material and in which (also) the non-conductive surfaces or substrates are to be coated with powder coatings.
  • the non-conductive objects, substrates or surfaces can be, for example, those made of glass, ceramics, textiles, textile materials, paper, paper materials, wood, wood materials and mineral substrates.
  • the method according to the invention can preferably be used for objects, surfaces or substrates which at least partially consist of plastic or plastic mixtures (plastic blends).
  • these can be plastics which are essentially dimensionally stable at the baking temperature of the powder coating, i.e. are sufficiently thermally stable.
  • plastics with softening temperatures below the baking temperature of the powder coating using the process according to the invention if the parts made of such plastics can be dimensionally stabilized in a corresponding manner.
  • a shape stabilization can take place, for example, by holding the part appropriately during the baking process or by combining such plastics with other materials in the form of composite materials or in the form of multi-part objects.
  • a preferred field of application of the invention is in the motor vehicle industry, so that the plastics used there can be used as a substrate to be coated or as a surface to be coated for powder coatings.
  • plastics are, for example, acrylonitrile-butadiene-styrene, polyamides, polycarbonates, polymethyl methacrylate, polyoxymethylene, polypropylene, polyphenylene oxide, Polyurethanes, polyvinyl chloride, polyethylenes and blends from such plastics.
  • the powder coating types which can be used in the invention are known per se. These are the common plastic powders based on thermosets, with hardeners, pigments and other additives mixed into them. Epoxy resins, epoxy / polyester resins, polyester resins (crosslinked with triglycidyl isocyanurate (TGIC) or free of TGIC), polyurethane resins (containing fission products or containing no fission products) and acrylate resins serve as the so-called binder base.
  • TGIC triglycidyl isocyanurate
  • acrylate resins serve as the so-called binder base.
  • the invention is not limited to the powder coating types mentioned by way of example.
  • the Pulvek paints that can be used have the usual grain sizes for electrostatic powder coating.
  • All of the powder coating types mentioned show the same good results when carrying out the process according to the invention, in particular when using water as the conductive substance, ie they lead to powder coating layers of perfect quality.
  • the paint layers obtained can easily be used in the motor vehicle industry, for example for the external painting of vehicles and vehicle parts.
  • powder coatings based on binder acrylic resin lead in the invention to highly weather-resistant powder coatings with excellent properties, which are also more transparent, for example, for coating Plastic cover plates can be used for motor vehicle headlights and other motor vehicle light sources.
  • the invention is not limited to the fact that the method according to the invention is carried out only once for the same object. Thus, several layers can easily be applied in succession to the same object using the method.
  • the object is again provided with a closed layer of the conductive substance, in particular water, and the second powder coating layer is then applied and baked on immediately.
  • the article can be coated with several layers of powder coating without problems.
  • a clear lacquer layer can be applied to the corresponding wet underlying layer made of the conductive substance.
  • the advantages of the invention are also evident in the repair of damaged paint layers. In this case, the powder coating layer is applied directly to the damaged coating layer after the conductive substance has been applied, and the coating surface is thus renewed in a simple manner.
  • the surface of the object to be coated can be used both in single-layer and in multi-layer driving are treated differently (presented).
  • the surface can be coated in its initial state, ie "raw”. If necessary, the surface is degreased and / or washed beforehand. If the washing process usually ends by rinsing with water, this water does not have to be dried off in the invention, but the coating with powder coating can take place directly on this water layer.
  • primed, laminated or painted, and also powder-coated, surfaces can be coated with powder coatings. If necessary, these objects are held in suitable holders.
  • the thickness of a lacquer layer or the thickness of all lacquer layers applied to the object are usually between 30 and 300 ⁇ m in the invention. Layer thicknesses between 50 and 130 ⁇ m, in particular 50 to 70 ⁇ m, are preferred. With this, all the usual areas of application for powder coatings can be covered with regard to the layer thickness.
  • the invention further relates to a powder-coated object which can be obtained by the process according to the invention described.
  • the substance used to produce the conductivity is removed again after the powder coating has been applied, so that no disruptive substances or layers remain on the object.
  • the invention relates to the use of a conductive substance in the electrostatic coating of non-conductive objects with powder coatings, the evaporation or evaporation temperature of this substance being below the baking temperature of the powder coating, in order to produce the conductivity required for the coating. speed. Preference is given to using water as the conductive substance, in particular demineralized or distilled water.
  • a plastic molded part made of PC / PBT blend in the form of a plate with a thickness of 2.5 mm to 3 mm should be electrostatically coated with powder coating.
  • the molded plastic part is cleaned in the usual way by alkaline cleaning. Subsequently, by immersing the plastic part in demineralized water, a closed water film is produced on the surface of the plastic part. To improve wetting, the demineralized water contains an amount of 0.2% by weight of polyether-modified polysiloxane as a wetting agent.
  • the wet plastic molding is then grounded and an acrylic resin-based powder coating in the usual way, i.e. applied to the wet plastic part with the aid of an electrostatic powder spray gun.
  • the plastic molding coated with water and powder coating is then dried at a temperature of 80 ° C. for 20 minutes.
  • the water is evaporated through the open-pore powder layer loosely adhering to the plastic molding. Since the drying temperature is 80 ° C below the lower limit of the melting range of the powder lacquer of approximately 100 ° C. and clearly below the stoving temperature of the powder coating, the curing process of the powder coating, which consists of powder melt and crosslinking of the melt, is not started.
  • the powder coating is baked for 20 minutes by increasing the temperature to the crosslinking temperature of about 160 ° C.
  • the method according to Example 1 creates a perfect powder clear coat layer with a layer thickness of approximately 60 ⁇ m on the plastic molding. Smaller and larger layer thicknesses can be produced without difficulty.
  • the coated plastic part obtained is suitable for industrial use, for example in the motor vehicle or furniture industry.
  • the appearance and durability of the layer obtained meet the requirements of consumers and manufacturers for a coating such as a one-layer coating in the automotive industry.
  • Example 1 is repeated with the same molded plastic part, tap water being used instead of demineralized water under otherwise identical process conditions. Polyether-modified polysiloxane is also added to this tap water in an amount of 0.2% by weight as a wetting agent. In this example too, a perfect powder coating layer of appropriate layer thickness is obtained.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

Procédé pour le revêtement électrostatique d'articles non conducteurs par des vernis en poudre, dans lequel l'article est revêtu, au moins sur les régions superficielles à enduire, d'une couche fermée (pellicule) d'une substance conductrice. La température de vaporisation ou d'évaporation de cette substance est inférieure à la température de cuisson du vernis en poudre. Après application de la couche de substance conductrice, le vernis en poudre est immédiatement appliqué, par voie électrostatique, sur cette couche, puis durci au four. Comme substance conductrice, l'eau est notamment utilisée.
PCT/EP1995/001876 1994-05-17 1995-05-17 Procede pour le revetement electrostatique d'articles non conducteurs par des vernis en poudre WO1995031293A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU26136/95A AU2613695A (en) 1994-05-17 1995-05-17 Method of electrostatically applying powder coating to non-conducting objects

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944417172 DE4417172A1 (de) 1994-05-17 1994-05-17 Verfahren zur elektrostatischen Pulverbeschichtung nichtleitender Gegenstände
DEP4417172.2 1994-05-17

Publications (1)

Publication Number Publication Date
WO1995031293A1 true WO1995031293A1 (fr) 1995-11-23

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ID=6518234

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/001876 WO1995031293A1 (fr) 1994-05-17 1995-05-17 Procede pour le revetement electrostatique d'articles non conducteurs par des vernis en poudre

Country Status (3)

Country Link
AU (1) AU2613695A (fr)
DE (1) DE4417172A1 (fr)
WO (1) WO1995031293A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19629499C2 (de) * 1996-07-22 1999-04-22 Fraunhofer Ges Forschung Verfahren zur elektrostatischen Erzeugung eines Mehrschichtaufbaus
DE19742298A1 (de) * 1997-09-25 1999-04-22 Fek Haustuerfuellungen Gmbh Türfüllung
CN115318597A (zh) * 2022-08-15 2022-11-11 索菲亚家居股份有限公司 一种木质基材表面涂装方法

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US6270853B1 (en) * 1997-06-20 2001-08-07 Raytheon Company Electrostatic powder coating of electrically non-conducting substrates
ATE221419T1 (de) * 1998-06-10 2002-08-15 Tyrolia Freizeitgeraete Verfahren zum pulverlackieren von bauteilen
DE10032558B4 (de) * 2000-07-05 2014-10-23 Volkswagen Ag Verfahren zum elektrostatischen Beschichten von Fahrzeuganbauteilen, danach hergestelltes Fahrzeuganbauteil und dessen Verwendung
DE10206593A1 (de) * 2002-02-15 2003-09-18 Wilhelm Oberbuchner Verfahren zur Aufbereitung von elektrisch nicht leitenden Oberflächen eines Kernmaterials zur Pulverlackbeschichtung
DE10340763B4 (de) * 2003-09-02 2008-08-28 Ritto Gmbh & Co. Kg Frontplatte für eine Türstation
DE102006017603A1 (de) 2006-04-12 2007-10-25 Geze Gmbh Abschlusselement sowie Verfahren zur Herstellung eines Abschlusselements
AT504712A1 (de) 2006-12-21 2008-07-15 Steyr Daimler Puch Ag Verfahren zur herstellung einer zusatzpanzerung
ITTO20120981A1 (it) * 2012-11-13 2014-05-14 Itt Italia Srl Metodo ed impianto per la verniciatura a polvere di elementi elettricamente non conduttivi, in particolare pastiglie freno

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GB1198462A (en) * 1966-09-27 1970-07-15 Hommel Company O Method of Electrostatic Application of Vitreous Frit Coatings to Glass and Other Ceramic Materials
DE1571125A1 (de) * 1961-03-06 1970-11-26 Ransburg Electro Coating Corp Verfahren zum elektrostatischen UEberziehen von Gegenstaenden
US3741793A (en) * 1971-08-12 1973-06-26 Electro Coating Corp Method of electrostatically coating hollow articles
FR2293989A1 (fr) * 1974-12-13 1976-07-09 Duco Sa Procede de revetement de substrats non conducteurs au moyen de produits filmogenes
EP0114252A1 (fr) * 1982-12-16 1984-08-01 Fulgurit GmbH & Co. Kommanditgesellschaft Installation de peinture par pulvérisation électrostatique
EP0381286A2 (fr) * 1989-02-02 1990-08-08 Beta Ricerche E Sviluppi S.A.S. Di Bernasconi E C. Procédé et appareil de revêtement par voie électrostatique, en particulier pour les matériaux non conducteurs
WO1992015404A1 (fr) * 1991-03-01 1992-09-17 S.L. Electrostatic Technology, Inc. Procede de depot de poudre pour revetement electrostatique, en vue de produire des stratifies pour plaquettes a circuits imprimes et similaires
WO1992022912A1 (fr) * 1991-06-12 1992-12-23 Henkel Corporation Composition et procede permettant d'ameliorer la conductivite superficielle de surfaces thermoplastiques_________________________
EP0534512A1 (fr) * 1991-09-03 1993-03-31 General Motors Corporation Procédé pour revêtir électrostatiquement substrats non-conducteurs

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FR1360336A (fr) * 1963-03-28 1964-05-08 Sames Mach Electrostat Procédé de revêtement de surfaces
JP2916967B2 (ja) * 1992-06-15 1999-07-05 日本ポリウレタン工業株式会社 架橋ポリウレタンエラストマーの製造方法

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Publication number Priority date Publication date Assignee Title
DE1571125A1 (de) * 1961-03-06 1970-11-26 Ransburg Electro Coating Corp Verfahren zum elektrostatischen UEberziehen von Gegenstaenden
GB1198462A (en) * 1966-09-27 1970-07-15 Hommel Company O Method of Electrostatic Application of Vitreous Frit Coatings to Glass and Other Ceramic Materials
US3741793A (en) * 1971-08-12 1973-06-26 Electro Coating Corp Method of electrostatically coating hollow articles
FR2293989A1 (fr) * 1974-12-13 1976-07-09 Duco Sa Procede de revetement de substrats non conducteurs au moyen de produits filmogenes
EP0114252A1 (fr) * 1982-12-16 1984-08-01 Fulgurit GmbH & Co. Kommanditgesellschaft Installation de peinture par pulvérisation électrostatique
EP0381286A2 (fr) * 1989-02-02 1990-08-08 Beta Ricerche E Sviluppi S.A.S. Di Bernasconi E C. Procédé et appareil de revêtement par voie électrostatique, en particulier pour les matériaux non conducteurs
WO1992015404A1 (fr) * 1991-03-01 1992-09-17 S.L. Electrostatic Technology, Inc. Procede de depot de poudre pour revetement electrostatique, en vue de produire des stratifies pour plaquettes a circuits imprimes et similaires
WO1992022912A1 (fr) * 1991-06-12 1992-12-23 Henkel Corporation Composition et procede permettant d'ameliorer la conductivite superficielle de surfaces thermoplastiques_________________________
EP0534512A1 (fr) * 1991-09-03 1993-03-31 General Motors Corporation Procédé pour revêtir électrostatiquement substrats non-conducteurs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19629499C2 (de) * 1996-07-22 1999-04-22 Fraunhofer Ges Forschung Verfahren zur elektrostatischen Erzeugung eines Mehrschichtaufbaus
DE19742298A1 (de) * 1997-09-25 1999-04-22 Fek Haustuerfuellungen Gmbh Türfüllung
CN115318597A (zh) * 2022-08-15 2022-11-11 索菲亚家居股份有限公司 一种木质基材表面涂装方法

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Publication number Publication date
DE4417172A1 (de) 1995-11-23
AU2613695A (en) 1995-12-05

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