EP0930105B1 - Verfahren zum Lackieren von Holz- oder Holzfaserngegenständen, lackierter Holzfaserngegenstand, und Lackierbedarf - Google Patents

Verfahren zum Lackieren von Holz- oder Holzfaserngegenständen, lackierter Holzfaserngegenstand, und Lackierbedarf Download PDF

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Publication number
EP0930105B1
EP0930105B1 EP99200076A EP99200076A EP0930105B1 EP 0930105 B1 EP0930105 B1 EP 0930105B1 EP 99200076 A EP99200076 A EP 99200076A EP 99200076 A EP99200076 A EP 99200076A EP 0930105 B1 EP0930105 B1 EP 0930105B1
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EP
European Patent Office
Prior art keywords
manufactured article
primer
varnish
stage
varnishing
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EP99200076A
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English (en)
French (fr)
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EP0930105A1 (de
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Alessandro Lucchini
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LUCCHINI, ALESSANDRO
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Individual
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Priority claimed from EP98830223A external-priority patent/EP0933141A1/de
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Priority to EP99200076A priority Critical patent/EP0930105B1/de
Priority to SI9930189T priority patent/SI0930105T1/xx
Publication of EP0930105A1 publication Critical patent/EP0930105A1/de
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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
    • 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
    • B05D7/06—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 to wood
    • B05D7/08—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 to wood using synthetic lacquers or varnishes

Definitions

  • the present invention relates to a method for varnishing manufactured articles made of wood or wood fibre.
  • Wood and wood substitutes such as, for example, MDF (Medium Density Fibreboard), LDF (Light Density Fibreboard), Trupan®, wood pulp, etc., are generally subjected to a varnishing process based on four main stages consisting of a pretreatment, the application of a primer, rubbing down and the final stage of varnishing.
  • the term pretreatment is understood to refer to all the operations which precede the application of the primer to the manufactured article. These operations vary based on the type of material being treated, its general condition, the type of finishing which it is desired to produce and the level of quality which it is desired to achieve.
  • MDF Medium Density Fibreboard
  • LDF Light Density Fibreboard
  • Trupan® wood pulp, etc.
  • the term pretreatment is understood to refer to all the operations which precede the application of the primer to the manufactured article. These operations vary based on the type of material being treated, its general condition, the type of finishing which it is desired to produce and the level of quality which it is desired to achieve.
  • MDF
  • the application of primer envisages at least two different passages to be carried out using liquid varnish, the aim of which is to stabilize the material for the purpose of the subsequent finishing stage. Between the various operations of applying the primer comes a stage of gentle rubbing down, the aim of which is to remove the surface imperfections of the manufactured article prior to the subsequent application.
  • varnishes can be used at this stage and are chosen depending on the type of application (by spraying, by dusting, with a roller, etc.) and depending on the type of material and/or passivation used. In general, these varnishes do not need conductivity properties, and the usual passivation temperature of the material is about 40°-80°C.
  • the actual varnishing stage determines the final appearance of the article; in the usual varnishing processes, varnishes diluted in solvents are used, these having various properties depending on the uses for which the manufactured article is intended or the type of application chosen.
  • the varnishing method described hereinabove requires the application of at least three coats (two applications of primer and the top coat, which is also diluted with solvent), and up to a maximum of seven coats.
  • the large consumption of material substantially increases the production costs of the finished product, and at the same time gives rise to environmental problems which can mainly be brought down to the evaporation of large quantities of solvent and to the disposal of the product once it has become unusable.
  • German patent application DE 19622921 A1 discloses a method of varnishing a wood substrate with powdered varnishes comprising steps b), c) and d) as defined in appended claim 1, and wherein the powdered varnishes have a polymerization temperature of 140°C or less. No preheat treatment of the wood substrate is however described.
  • the problem underlying the present invention is thus to provide a method for varnishing manufactured articles made of wood or wood fibre, which overcomes the abovementioned problems.
  • a method for varnishing a manufactured article made of wood or wood fibre comprising a first stage of rubbing down the surface of the said manufactured article, characterized in that it comprises the following successive stages of:
  • the varnishing method according to the invention requires a treatment of the manufactured article which differs from that proposed in conventional methods and which takes the form of simplification or replacement of some of the traditional operating stages.
  • the first condition for the method is the rubbing-down of the manufactured article, since its initial surface state is of considerable importance if a high-quality final result is to be obtained.
  • the manufactured article is preheated. This stage, which is not present in traditional methods involving finishing with a liquid varnish, can be carried out using conventional kilns.
  • the final preheating temperature of the manufactured article depends on the type of material being considered and its thickness. In general, especially as regards materials composed of wood fibre, such as MDF, low thicknesses show greater surface hardness and this allows the preheating temperature of the material to be reduced. Preferably, the preheating temperature of the manufactured article is maintained in the region from 100 to 200°C.
  • An air temperature about 10-15°C greater than that required by the material used is maintained inside the kiln, in order to ensure that the manufactured article reaches the preset temperature.
  • the residence time in the kiln depends considerably on the dimensions of the manufactured article, on its composition and, lastly, on its degree of humidity; for the same material and thickness, a higher percentage of humidity generally requires a longer residence time in the kiln or, when this is not possible, a higher air temperature in the kiln.
  • Trupan® boards 30 mm in thickness were subjected to temperatures of about 160°C for periods of between 10 and 20 minutes, giving excellent results.
  • the same times, but with temperatures of about 120°C, were applied to Fantoni Plaxil 100 MDF boards, while longer times (30 min) but even lower temperatures (about 100°C) were applied to manufactured articles made of wood.
  • the residence time in the preheating kiln is less than or equal to 40 minutes.
  • the application of electrically conductive primer after preheating the manufactured article is an essential stage and ensures a high-quality result for the powder-varnishing.
  • the primer can be applied, for example, by immersion, by spraying or with a roller.
  • the powdered varnishes are applied using specific devices which charge the powder either positively (triboelectric guns, which charge the powder by direct friction) or negatively (corona-effect guns).
  • the use of both devices necessarily requires the presence of a support which has specific electrical conductivity properties, this being a property which is not present in wood or in wood substitutes in the natural state.
  • the primer which is used in the method according to the invention must thus be stable at high temperatures (up to 250°C) and must have electrical conductivity properties. On applying it, the manufactured article becomes much less sensitive to temperature changes, since the primer inhibits, at least partially, any formation of cracks on its surface.
  • the electrical conductivity properties acquired by the manufactured article treated with the primer described above allow powdered varnishes to be applied by conventional methods, thus simplifying the method as a whole.
  • the electrically conductive primer is applied to the manufactured article while it is still hot, having a temperature of not more than 180°C; this approach helps the primer to penetrate into the fibres of the manufactured article, thus making it easier to stabilize its outer surface, and at the same time makes it possible to dispense with intermediate cooling apparatus.
  • the primer is applied to the manufactured article which is at a temperature ranging from 40 to 80°C.
  • an essential feature of the primer is its electrical conductivity.
  • the minimum value of electrical conductivity necessary for the primer to allow a good coverage of the powdered varnish on the wooden substrate can vary from a primer to another and it is generally difficult to be measured.
  • a qualitative test for verifying the electrical conductivity of the primer is therefore used (electrical conductivity test, ECT), which is based on the varnishing of a wooden substrate of reference in standard conditions by using different primers.
  • the electrically conductive primer can be commercially available as a finished product or can be prepared by mixing in suitable proportions a varnish with a conductive component.
  • a varnish with a conductive component.
  • An example of a conductive component which can be used is powdered graphite.
  • the amounts of varnish and conductive component which have to be mixed to form a suitable primer can be determined by using the electrical conductivity test, as it will be examplified below.
  • the treatment envisages a first layer of primer on the manufactured article, which has been rubbed down beforehand, and, optionally, which is still at the temperature of the preceding preheating operation. If necessary, after primer has been applied, the manufactured article is again heated in order to bring it to temperature prior to the subsequent application.
  • This intermediate heating stage is preferably carried out at temperatures ranging from 100 to 200°C.
  • the primer is applied prediluted so as to allow it to penetrate more deeply into the manufactured article, thus optimizing the operation.
  • this primer can be applied, independently from one layer to another, in pure or dilute form.
  • the dilution of the primer varies either according to the type of material which is to be treated or according to its method of application. Generally, the more compact the material, the lower the percentage of solvent which needs to be added to the base primer. For some materials, such as, for example, MDF Fantoni Plaxil 100, it can also be observed that by decreasing the thickness of the manufactured article, the required dilution is reduced.
  • the dilution also depends on the means used to apply the primer; for the same material at the same temperature, application with a roller generally requires a lower dilution than an application by spraying.
  • the manufactured article has to undergo a heating stage.
  • This operation must, however, be carried out by methods different to those applied in the preceding preheating stage, since the purpose of this new heat treatment is not only to dry the surface of the manufactured article, but also to prepare it for application of the film of powder and the subsequent polymerization of this powder.
  • the manufactured article is treated at temperatures of between 130°C and 200°C, depending on the type of firing required by the particular powder used, and for periods of up to 40 min, while remaining both chemically and structurally stable.
  • the manufactured article has to be freed of any final traces of moisture and of chemical products which might appear at the surface during the polymerization of the powder, thereby giving rise to bubbles, making the manufactured article fall short of the specificities required for varnishing (discontinuity of the surface of the film of powder, microbubbles, etc.).
  • the kiln temperature and the related residence time therein of the manufactured article depend closely on the type and dimensions of the manufactured article, and on the firing time of the varnishing powder chosen. However, the principle of reducing as much as possible the temperatures to which the manufactured article must be subjected remains valid, so as to minimize the stresses inflicted on the material.
  • the next and final rubbing-down is carried out, if required. After rubbing down, the manufactured article is ready for the powder-varnishing and the final polymerization.
  • the choice of the type of varnishing powder automatically defines the polymerization cycle; it is possible to choose from among many categories of powders, not only based on the type of conditions which the manufactured article must face (internal, external, attacking atmospheres, etc.), but also based on the type of polymerization which it is desired to use.
  • the powders which can be used for the varnishing stage are of conventional type; the optimum choice of the type of powder depends on many different factors which come down to the nature of the manufactured article.
  • Powders with moderate polymerization temperatures and times are preferably used, so as to reduce the thermal stresses to which the manufactured article is subjected. It should also be pointed out that these polymerization parameters influence not only the powder-varnishing stage, but also the preceding stages associated therewith.
  • a low polymerization temperature of the powder makes it possible to reduce both the maximum heating temperature of the primer and the preheating temperature of the board.
  • the powders which can be used in the method according to the invention have to form a film of high elasticity, high direct and indirect impact strength and high resistance to chemical and atmospheric agents.
  • the kind of electrically conductive primer which is used can influence the adhesiveness of the powdered varnish - which can be measured by using the Cross-Cut Test (ISO test 2409) - in particular in all those applications in which the wooden substrate may be subjected to mechanical wear and tear.
  • the primer coded 0073/C from the company TECNOCOLOR s.r.l., having a Gt 0/5 B score (ISO test 2409).
  • the heat treatments are carried out in hot-air kilns, thus minimizing any deformations which the manufactured article suffers by gradually increasing the temperature.
  • the present invention also provides a varnished manufactured article as depicted in claims 18-24.
  • the primers used are those from the company IVLA Polimeri S.p.A. (code PA1095), from the company Servimétal France (Graphital Standard) and from the company TECNOCOLOR s.r.l. (code 0073/C), and the said film of varnish has an impact strength of at least 1.5 Nm (ECCA test T5), a drawing of at least 3 mm (ISO test-1520) and a bending of at least 3 mm (ISO test 1519).
  • a further aspect of this invention is the provision of a kit as depicted in claims 25 and 26.
  • the powder-varnishing method according to the invention makes it possible, compared with conventional techniques using liquid varnishes, to reduce substantially the use of pollutants, such as varnishes and solvents.
  • it is generally sufficient to apply a maximum of two coats of primer, which is optionally diluted, whereas in a traditional method, anywhere from a minimum of three applications of liquid varnishes (two coats of primer and the top coat, which is also diluted with solvent) up to a maximum of seven are needed.
  • the production plants used to carry out the method according to the invention also make it possible to recover up to 97% of the powder used, which can then be returned into the productive cycle.
  • the remaining 3% is extracted using suitable absolute filters which purify the air by purely mechanical means, i.e. without the use of chemical substances of any type.
  • thermosetting powders makes it possible in most cases to dispense with the sanding operations required in conventional methods. This leads in itself to a reduction in the production costs, but is even more important for the fact that it is thus possible to carry out an entirely automated process without the need for restarting; the manufactured article can thus be coupled, in raw form, to a suitable transporter and released after completion of the polymerization, after a fixed time. In this way, the production is substantially rationalized.
  • the cost of the powdered varnish may be comparable to that of traditional liquid varnish, but the yield is higher as a result of the lower level of consumption and the efficiency of the recovery systems.
  • the method according to the invention also makes it possible to transfer onto supports made of wood or of wood fibres any type of finishing which is normally available on a metal support.
  • any type of finishing which is normally available on a metal support.
  • this makes it possible to enjoy the typical advantages of a powder-varnishing, such as, for example, increased resistance of the manufactured article to chemical and mechanical stresses, to wear and to atmospheric agents.
  • Substrate of reference MDF Fantoni Plaxil 100 or Trupan®, 300x300x14 mm board.
  • the board has two 2 mm diameter holes at the two opposed extremities in order to be hooked to the transporter. 2 mm diameter iron hooks are used.
  • a stable contact between the board and the hooks is essential in order to allow the grounding of the conductive surface of the board.
  • the board must be vertical during application of the powdered varnish.
  • the test is positive when the board is uniformly covered by a powdered varnish layer.
  • the primer is not sufficiently conductive, the formation of a discontinuous powder layer is observed, with zones of the surface which are only covered by a very thin layer of varnish or are not covered at all. In case of doubt, the insufficient covering of the board can be easily recognized after the polymerization step which is performed by heating.
  • Varnish used for the primer code 0100/C, TECNOCOLOR s.r.l.
  • Conductive component code 0101/C, TECNOCOLOR s.r.l. (containing graphite powder)
  • graphite powder as such can also be conveniently used.
  • the varnish and the conductive component were mixed in various amounts in order to establish the right proportions to give a good result in the application of the powdered varnish.
  • the composition of the primer was tested using the electrical conductivity test described above. The following table summarizes the results obtained:
  • the primers having the compositions of items 5, 6 and 7 are suitable for performing the method of the present invention.
  • the composition of item 6 corresponds to the commercial primer coded 0073/C from the company TECNOCOLOR s.r.l.
  • the cross-cut test for determining the adhesiveness of the varnish on the finished product is performed by creating on the varnished surface with a comb tool a cross-cut area.
  • the distance between the grooves depends on the thickness of the varnish film: thickness of film distance between grooves ⁇ 60 micron 1 mm 60-120 micron 2 mm > 120 micron 3 mm
  • the surface is then 5-times brushed in diagonal direction.
  • An adhesive strip is adhered to the cross-cut surface and is then removed by tear.
  • a primer for being suitably used for varnishing products which expect to have high mechanical wear and tear, must have a score of at least Gt 2/3 B in this test.
  • primer 0073/C (TECNOCOLOR s.r.l.) Gt 0/5 B primer PA1095 (ILVA Polimeri S.p.A.) Gt 2/3 B primer Graphital Standard (Servimetal France) Gt 2/3 B
  • the primer was applied using a common manual gun with a bucket, with an inlet air pressure limited to 3.5 atm. and a spray nozzle 1.2 mm in diameter.
  • a solvent from the company ILVA Polimeri S.p.A., code TZ 50 was used to dilute the primer PA1095 (when necessary), while rainwater was used to dilute the Graphital Standard.
  • a squared and rubbed-down Trupan® board with dimensions of 30x300x300 (mm) was preheated to a temperature of 160°C for a period of 10 min.
  • the primer prediluted to 15% was applied, by low-pressure spraying, to the board at a temperature of 150°C.
  • a second layer of pure primer was applied (by low-pressure spraying) but only on the edges of the board, which at this point had reached a temperature of 100°C.
  • the product thus obtained was heated to a temperature of 185°C for a period of 20 min and, after returning to a temperature of 120°C, was varnished with a powdered varnish (epoxy polyester, Grigio Raggrinzato Metallizzato Pulverlac code 2220203501), which was polymerized at 180°C for a period of 22 min.
  • the product thus obtained had good surface uniformity and excellent covering of the edges.
  • a squared and rubbed-down Trupan® board with dimensions of 30x300x300 (mm) was preheated to a temperature of 160°C for a period of 10 min.
  • the primer prediluted to 20% was applied, by low-pressure spraying, to the board at a temperature of 150°C.
  • the product thus obtained was heated to 160°C for a period of 5 min and then a second layer of primer was applied (by low-pressure spraying) but only on the edges of the board, which at this point had reached a temperature of 150°C.
  • the product thus obtained was heated to a temperature of 190°C for a period of 20 min, sanded down (light, 1000 particles/cm 2 grain) and, after returning to a temperature of 135°C, was then varnished with a powdered varnish (Nero Opaco Matt liscio Arsonsisi, code B140N00). The powder was finally polymerized at 185°C for a period of 22 min.
  • the product thus obtained had good surface uniformity and excellent covering of the edges.
  • a Fantoni Plaxil 100 MDF board with dimensions 10x300x300 (mm) was preheated to a temperature of 170°C for a period of 15 min.
  • the pure primer was applied, with a roller, to the board at a temperature of 160°C.
  • the product thus obtained was heated to a temperature of 165°C for a period of 20 min, sanded down (light, 1000 pti/cm 2 grain) and, after returning to a temperature of 110°C, was then varnished with a powdered varnish (epoxy polyester, Grigio Raggrinzato Metallizzato, Pulverlac code 2220203501).
  • the powder was finally polymerized at 160°C for a period of 35 min.
  • the product thus obtained had good surface uniformity and excellent covering of the edges.
  • a parallelepiped of beech with dimensions of 50x50x400 mm was preheated to a temperature of 110°C for a period of 30 min.
  • the primer prediluted to 25% was applied, by low-pressure spraying, to the product at a temperature of 105°C.
  • the product thus obtained was heated to 130°C for a period of 5 min and a second layer of primer diluted to 10% was then applied (by low-pressure spraying), the manufactured article at this point having reached a temperature of 120°C.
  • the product thus obtained was heated to a temperature of 190°C for a period of 20 min and, after returning to a temperature of 120°C, was varnished with a powdered varnish (epoxidic, Grigio Basalto Liscio Opaco, Europolveri, code 604.8.5611).
  • the powder was finally polymerized at 185°C for a period of 22 min.
  • the product thus obtained had good surface uniformity.
  • a parallelepiped of Trupan® with dimensions of 130x85x30 mm was preheated to a temperature of 160°C for a period of 5 min.
  • the prediluted primer (1:4 (vol) primer:rainwater) at a temperature of 70°C was applied, by partial immersion for 120 sec, to the manufactured article at a temperature of 150°C.
  • the product thus obtained was heated to 160°C for a period of 10 min and was then sanded down lightly with a cloth of 800 particles/cm 2 grain.
  • the product at a temperature of 120°C, was varnished a first time with a powdered varnish (Herberts, Rosso BT AT Senza Piombo, code 12.00.7115), heated in an kiln to 160°C for 3 min and then cooled to 130°C, at which temperature a second coat of powder was applied.
  • a powdered varnish Herberts, Rosso BT AT Senza Piombo, code 12.00.7115
  • the powder was finally polymerized at 160°C for a period of 20 min.
  • the product thus obtained had an excellent surface finish.
  • a parallelepiped of Trupan® with dimensions of 130x85x30 mm was preheated to a temperature of 160°C for a period of 15 min.
  • the prediluted primer (1:4 (vol) primer:rainwater) with a temperature of 70°C was applied, by partial immersion for 180 sec, to the product at a temperature of 150°C.
  • the product thus obtained was heated to 160°C for a period of 15 min and then sanded down lightly with a cloth of 800 particles/cm 2 grain.
  • the product at a temperature of 120°C, was varnished with a powdered varnish (Herberts, Rosso BT AT Senza Piombo, code 12.00.7115).
  • the powder was finally polymerized at 160°C for a period of 20 min.
  • the product thus obtained had a good surface finish.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)

Claims (26)

  1. Verfahren zum Lackieren eines aus Holz oder Holzfasern hergestellten Gegenstandes, bei dem in einem ersten Schritt die Oberfläche des hergestellten Gegenstandes abgeschliffen wird, enthaltend die folgenden, aufeinanderfolgenden Schritte:
    a) gleichmäßiges Vorheizen des hergestellten Gegenstandes;
    b) Aufbringen einer oder mehrerer Schichten einer elektrisch leitfähigen Grundierung auf die Oberfläche des hergestellten Gegenstandes;
    c) Erhitzen des hergestellten Gegenstandes;
    d) Lackieren des hergestellten Gegenstandes mit einem Pulverlack.
  2. Verfahren nach Anspruch 1, bei dem die Grundierung eine elektrische Leitfähigkeit hat, die ausreichend ist, um es dem Pulverlack zu ermöglichen, eine homogene Schicht auf dem hergestellten Gegenstand, wie mit dem ECT-Test ermittelt, zu bilden.
  3. Verfahren nach den Ansprüchen 1 oder 2, bei dem das Vorheizen bis zu einer Temperatur ausgeführt wird, die im Bereich zwischen 100 und 200°C liegt.
  4. Verfahren nach den Ansprüchen 1 bis 3, bei dem das Vorheizen des hergestellten Gegenstandes für eine Zeitdauer ausgeführt wird, die kürzer oder gleich 40 Minuten ist.
  5. Verfahren nach einem der vorhergehenden Ansprüche, bei dem die Grundierung auf den hergestellten Gegenstand aufgebracht wird, der eine Temperatur von unterhalb oder gleich 180°C hat.
  6. Verfahren nach Anspruch 5, bei dem die Grundierung auf den hergestellten Gegenstand aufgebracht wird, der eine Temperatur im Bereich zwischen 40 und 80°C hat.
  7. Verfahren nach einem der vorhergehenden Ansprüche, bei dem die Grundierung ausgewählt ist aus PA1095 von der Firma ILVA Polimeri S.p.A., Graphital Standard von der Firma Servimétal (Frankreich) und 0073/C von der Firma Tecnocolor s.r.l..
  8. Verfahren nach einem der vorhergehenden Ansprüche, bei dem im Schritt b) eine oder mehrere der Schichten aus reiner oder verdünnter Grundierung unabhängig voneinander aufgebracht werden.
  9. Verfahren nach einem der vorhergehenden Ansprüche, bei dem eine einzige Grundierungsschicht im Schritt b) aufgebracht wird.
  10. Verfahren nach einem der Ansprüche 1 bis 8, bei dem zwei oder mehr Grundierungsschichten im Schritt b) aufgebracht werden.
  11. Verfahren nach Anspruch 10, bei dem im Schritt b) ein Zwischenheizschritt zwischen zwei Grundierungsaufbringungen eingefügt wird.
  12. Verfahren nach Anspruch 11, bei dem der Zwischenheizschritt bei einer Temperatur ausgeführt wird, die im Bereich zwischen 100 und 200°C liegt.
  13. Verfahren nach einem der vorhergehenden Ansprüche, bei dem der Heizschritt des hergestellten Gegenstandes bei einer Temperatur stattfindet, die im Bereich zwischen 130°C und 200°C liegt.
  14. Verfahren nach einem der vorhergehenden Ansprüche, bei dem der Heizschritt für eine Zeitdauer ausgeführt wird, die kürzer oder gleich 40 Minuten ist.
  15. Verfahren nach einem der vorhergehenden Ansprüche, bei dem die Schritte des Vorheizens und des Heizens des hergestellten Gegenstandes in einem Ofen mit Luft ausgeführt werden.
  16. Verfahren nach einem der vorhergehenden Ansprüche, bei dem im Schritt d) zwei Schichten aus Pulverlack aufgebracht werden.
  17. Verfahren nach einem der vorhergehenden Ansprüche, bei dem die Grundierung derart ist, daß sie eine Klebkraft des Pulverlacks auf dem hergestellten Gegenstand von wenigstens Gt 2/3 B, wie mit dem ISO-Test 2409 bestimmt, ermöglicht.
  18. Hergestellter Gegenstand, enthaltend eine Basis aus MDF oder Trupan®, wobei die Basis weiterhin in der gegebenen Reihenfolge enthält: eine oder mehrere Schichten aus einer elektrisch leitfähigen Grundierung und einen Film aus einem polymerisierten Pulverlack, wobei der Lack eine Polymerisationsthemeratur hat, die zwischen 150°C und 190°C liegt.
  19. Hergestellter Gegenstand nach Anspruch 18, bei dem die Grundierung eine elektrische Leitfähigkeit hat, die ausreichend ist, um es dem Pulverlack zu ermöglichen, eine homogene Schicht auf dem hergestellten Gegenstand, wie mit ECT-Test bestimmt, zu bilden.
  20. Hergestellter Gegenstand nach Anspruch 19, bei dem die Grundierung ausgewählt ist aus PA1095 von der Firma ILVA Polimeri S.p.A., Graphital Standard von der Firma Servimétal (Frankreich) und 0073/C von der Firma Tecnocolor s.r.l..
  21. Hergestellter Gegenstand nach den Ansprüchen 18 bis 20, bei dem der Lackfilm eine Schlagfestigkeit von wenigstens 1,5 Nm (ECCA-Test T5) hat.
  22. Hergestellter Gegenstand nach den Ansprüchen 18 bis 21, bei dem der Lackfilm einen Zug von wenigstens 3 mm (ISO-Test 1520) hat.
  23. Hergestellter Gegenstand nach den Ansprüchen 18 bis 22, bei dem der Lackfilm eine Biegung von wenigstens 3 mm (ISO-Test 1519) hat.
  24. Hergestellter Gegenstand nach den Ansprüchen 18 bis 23, bei dem die Grundierung derart ist, daß sie eine Klebkraft des Pulverlacks auf dem hergestellten Gegenstand von wenigstens Gt 2/3 B, wie mit dem ISO-Test 2409 bestimmt, ermöglicht.
  25. Lacksatz, enthaltend eine elektrisch leitfähige Grundierung und einen Pulverlack, wobei der Lack eine Polymerisationstemperatur hat, die zwischen 150°C und 190°C liegt, wobei die Grundierung ausgewählt ist aus PA1095 von der Firma ILVA Polimeri S.p.A., Graphital Standard von der Firma Servimétal (Frankreich) und 0073/C von der Firma Tecnocolor s.r.l..
  26. Lacksatz nach Anspruch 25, bei dem die Grundierung derart ist, daß sie eine Klebkraft des Pulverlacks auf dem hergestellten Gegenstand von wenigstens Gt 2/3 B, wie mit dem ISO-Test 2409 bestimmt, ermöglicht.
EP99200076A 1998-01-16 1999-01-13 Verfahren zum Lackieren von Holz- oder Holzfaserngegenständen, lackierter Holzfaserngegenstand, und Lackierbedarf Expired - Lifetime EP0930105B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP99200076A EP0930105B1 (de) 1998-01-16 1999-01-13 Verfahren zum Lackieren von Holz- oder Holzfaserngegenständen, lackierter Holzfaserngegenstand, und Lackierbedarf
SI9930189T SI0930105T1 (en) 1998-01-16 1999-01-13 Method for varnishing manufactured articles made of wood or wood fibre, varnished article made of wood fibre, and varnishing kit

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
EP98830012 1998-01-16
EP98830012 1998-01-16
EP98830223 1998-04-14
EP98830223A EP0933141A1 (de) 1998-01-16 1998-04-14 Verfahren zum Firnissen von Holz- oder Holzfaserngegenständen
EP98202962 1998-09-04
EP98202962 1998-09-04
EP99200076A EP0930105B1 (de) 1998-01-16 1999-01-13 Verfahren zum Lackieren von Holz- oder Holzfaserngegenständen, lackierter Holzfaserngegenstand, und Lackierbedarf

Publications (2)

Publication Number Publication Date
EP0930105A1 EP0930105A1 (de) 1999-07-21
EP0930105B1 true EP0930105B1 (de) 2002-11-06

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EP99200076A Expired - Lifetime EP0930105B1 (de) 1998-01-16 1999-01-13 Verfahren zum Lackieren von Holz- oder Holzfaserngegenständen, lackierter Holzfaserngegenstand, und Lackierbedarf

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EP (1) EP0930105B1 (de)
AT (1) ATE227169T1 (de)
DE (1) DE69903757T2 (de)
ES (1) ES2187114T3 (de)
SI (1) SI0930105T1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2229913B1 (es) * 2003-07-11 2006-02-16 Industrias Mova, S.A. Procedimiento de aplicacion de lacas protectoras sobre mobiliario de rattan y dispositivo para su puesta en practica.
CN113546828A (zh) * 2021-07-26 2021-10-26 东风柳州汽车有限公司 一种水性漆车身喷涂工艺

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2992139A (en) * 1958-05-02 1961-07-11 Desoto Chemical Coatings Inc Method for electrostatic spraying of non-conductors
AU1727270A (en) * 1969-09-18 1971-08-05 Ransburg Electro Coating Corp Pretreatment coating composition for electrostatic spraying including activable pigment and method.
FR2293989A1 (fr) * 1974-12-13 1976-07-09 Duco Sa Procede de revetement de substrats non conducteurs au moyen de produits filmogenes
GB2024658A (en) * 1978-07-07 1980-01-16 Shaw J G Coating of compressed board materials
SE442832B (sv) * 1980-05-23 1986-02-03 Bjorn Von Tell Sett att fylla ut ytojemnheter i treprodukter med ridabeleggning
US5273787A (en) * 1992-04-03 1993-12-28 Macmillan Bloedel Limited Method of protecting wood surfaces and a wood product produced thereby
DE19536844C1 (de) * 1995-10-02 1997-04-10 Bayer Ag Verfahren zur elektrostatischen Lackierung von nicht leitfähigen Oberflächen
DE19622921C3 (de) * 1996-06-07 2003-09-18 Basf Coatings Ag Verfahren zur Herstellung eines Schichtstoffes und dessen Verwendung

Also Published As

Publication number Publication date
ATE227169T1 (de) 2002-11-15
ES2187114T3 (es) 2003-05-16
SI0930105T1 (en) 2003-04-30
DE69903757D1 (de) 2002-12-12
DE69903757T2 (de) 2003-07-17
EP0930105A1 (de) 1999-07-21

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