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
  • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
  • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
  • B05D5/061—Special surface effect
• • 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
  • B05D1/00—Processes for applying liquids or other fluent materials
  • B05D1/30—Processes for applying liquids or other fluent materials performed by gravity only, i.e. flow coating
  • B05D1/305—Curtain coating
• • 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
  • B05D1/40—Distributing applied liquids or other fluent materials by members moving relatively to surface
• • 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
  • B05D2503/00—Polyurethanes
• • 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
  • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
  • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
  • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
  • B05D3/065—After-treatment
  • B05D3/067—Curing or cross-linking the coating
• • 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
  • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
  • B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
• • 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

Definitions

• the present invention relates to a method for producing a seamless high-gloss surface on at least part of an optionally coated carrier surface with an adjacent edge of an article, as well as objects obtainable in this way.
• a likewise known method provides that wood-based panels, such as MDF or HDF boards are coated with paper, preferably so-called melamine papers, which are applied with melamine resin to the plate, wherein a directly coated carrier plate is produced.
• the melamine papers are pressed with highly polished press plates.
• the quality of these glossy surfaces can not be compared with painted surfaces or foils in terms of gloss, depth and surface calmness.
• these plates can be further processed in direct postforming.
• the present invention is therefore based on the object to provide a more efficient method for producing seamless high-gloss surfaces in the surface and edge, wherein the above-mentioned disadvantages are avoided.
• the present invention also offers the possibility to achieve plain or printed surfaces, which can be continued seamlessly in all degrees of gloss on the edge of workpieces.
• the invention offers the possibility to deform even with high-gloss coated melamine surfaces in the direct postforming process.
• step (a) and / or (a1)) based on a polyurethane as a primer on a raw MDF / HDF board creates a homogeneous, opaque and highly flexible coating which, if necessary, in combination with a transparent coating to be applied in the subsequent step (steps (a) and (a1)) improves the conditions such that a high gloss surface and narrow area (edge) can be produced by direct postforming without breaking.
• the colored reactive polyurethane-based melt is preferably a commercially available polyurethane-based reactive melt which preferably reacts and cures by the moisture of the surrounding air.
• this reactive melt is water and solvent-free, which is now used in the context of "HotCoating" technology for the refinement of surfaces.
• the colored reactive polyurethane-based melt can, in combination with a likewise colored lacquer, represent the decorative single-colored layer or as a primer for a coloring by e.g. Digital printing act.
• Another aspect of the present invention is the subject of having a high gloss surface on at least a portion of a support surface obtainable by the method of the invention.
• the support surface may be uncoated or already have a coating. In the latter case, step (a) is performed on the surface of the coating. Without such a coating step (a) takes place directly on the surface of the carrier layer.
• the lacquer layer is applied in step (c) and / or step (a3) prior to complete curing of the enamel.
• the paint in step (c) or (a3) is UV-curing.
• the coating of the support surface serves as a decorating, covering, uni-colored layer on preferably raw wood-based panels.
• the coating of the support surface serves as opaque, uni-colored primer with printing.
• the lacquer layer to be applied in step (c) comprises a UV-curable high-gloss lacquer which is applied via a creasing roller or curtain coater.
• the coating to be applied in step (a) is applied directly to one with melamine paper coated carrier plate applied.
• step (b) and / or (a2) applied reactive melt is smoothed by a counter to the direction of rotation of the applicator roll encircling smoothing roller.
• the smoothing roller rotates at a rotational speed in the range of 1-30m / min, preferably 1-6 m / min.
• At least one further lacquer layer comprising a UV-curing lacquer, is applied by means of a roller, by means of spraying or by means of ink-jet.
• step (c) a lacquer intermediate grinding is carried out between the optionally several lacquer layers of step c.
• Such intermediate lacquer sanding is also possible before step (a5).
• the support surface made of wood or woody material.
• the support surface provides an element surface of a furniture or piece of furniture or interior fitting.
• the reactive polyurethane-based enamel ((a) / (a1)) is preferably a commercially available polyurethane-based reactive enamel, which normally reacts with the aid of the moisture present in the ambient air and hardens.
• this reactive melt is free of water and solvent.
• the preferably water- and solvent-free reactive melt layer is usually applied to the surface to be coated at a temperature of at least 100 ° C, about 100 ° C to 150 ° C, preferably 120 ° C to 150 ° C. Normally, about 20 to 150 g of reactive melt can be applied per square meter of surface to be coated.
• the reactive melt usually has a density of about 1.1 g / m 2 and a BROOKFIELD viscosity at 120 ° C in the range of about 2000 mPas to 30,000 mPas, preferably 4,000 mPas to 10,000 mPas. It is advantageous to apply the reactive melt layer under exclusion of air and shielding from atmospheric moisture to prevent premature Ausreagieren.
• the layer can, for example, be doctored, rolled, sprayed or by means of a nozzle or Slot nozzle can be applied. Even in the cured state, the reactive melt layer still has a certain residual elasticity.
• the reactive melt layer has a thickness in the range of 20 microns to 150 microns, more preferably from 80 microns to 100 microns
• the staining of the enamel may be carried out by methods known to those skilled in the art.
• conventional dyes and pigments are used.
• a white base color can be obtained by titanium dioxide.
• the lacquer used ((c) / (a3)) can be any lacquer which advantageously hardens quickly in order to allow the premature further processing or packaging of the articles after the coating as early as possible.
• 2-component polyurethane paints nitro paints or water-based paints may be mentioned.
• UV-curing paints are used.
• This widespread coating system can be applied to the objects by roller application or spray application.
• the subsequent curing process can be done with UV light or UV lamps. Due to the viscosity and the UV curing, only approx. 10 to 20 ⁇ m thick layers can be applied with each coating application, which is why it is usually necessary to have several paint jobs.
• the varnish layer in multiple layers. Preferably, however, this is applied in one layer. This is usually sufficient because a reactive melt is already applied as part of the coating. However, in particular lacquer interpolations, there is a multi-layered application.
• the resist layer preferably has only a thickness in the range of 5 ⁇ m to 25 ⁇ m, more preferably 5 ⁇ m to 10 ⁇ m.
• An improvement in the surface properties of the reactive melt layer can be achieved by smoothing the reactive melt layer after application to the (partial) surface of the article ((b) / (a2)). This is not always mandatory, but it is preferred in the context of the present invention.
• the smoothing by means of a smoothing roll, for example a steel roll directly after the applicator roll, or a smoothing belt, which may optionally be provided with a polyurethane coating.
• the support surfaces of the objects are surfaces of furniture or interior fittings.
• the optionally coated support surface may be made of wood or a wood-like material, iron, non-ferrous metal, plastic, paper, cardboard, papier mache or a mineral substance at least partially.
• the printing in step (a5) can be done by conventional methods. These are known to the person skilled in the art. Preferably, digital printing is used.
• step (d) the adjacent edge coating is done in the postforming direct process to obtain a seamless surface around the support surface as well as the edge. This method is well established and familiar to the person skilled in the art.
• Postforming in general involves the subsequent (post) deformation of an already applied surface coating of material boards along an edge profile.
• the surface material is left over the profiled edge during the coating of the material plate and glued on in a downstream process by a postforming machine (cycle and classical continuous process).
• Postforming parts are used wherever wood-based materials and their edges are exposed to particularly high levels of exposure to moisture, chemicals and mechanical stress. Examples are bathroom and kitchen furniture.
• the starting material generally consists of unprofiled, coated plates without supernatant of the surface material.
• the machine profiles the deformation area itself, exposing as much of the coating material as needed to coat the edge. Subsequently, the supernatant is beaten around the edge profile.
• One of the advantages of the direct process is that a machine can be used for multiple operations, shortening in-house transport routes, thereby reducing the risk of damage and simplifying work organization.
• the starting material used are preferably already coated or uncoated plates. Possible surface materials are HPL laminates, CPL laminates> 0.4 mm, polyester or postformable melamine direct coating and veneers.
• Manufacturers of machines for direct postforming in the passage up to 20 m / min are, for example, Homag, Germany; IDM, Italy or IMA, Germany.

Landscapes

• Application Of Or Painting With Fluid Materials (AREA)
• Laminated Bodies (AREA)

Priority Applications (1)

Applications Claiming Priority (1)

Publications (2)

Family

ID=50828667

Family Applications (1)

Country Status (4)

Cited By (2)

Citations (3)

• 2013
  • 2013-05-03 DE DE201310208159 patent/DE102013208159A1/de not_active Withdrawn
• 2014
  • 2014-04-28 EP EP14166176.9A patent/EP2799155B1/fr active Active
  • 2014-04-28 PL PL14166176T patent/PL2799155T3/pl unknown
  • 2014-04-28 ES ES14166176.9T patent/ES2668698T3/es active Active

Patent Citations (3)

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