WO2020144042A1 - Application au rouleau de vernis sur des surfaces en bois - Google Patents

Application au rouleau de vernis sur des surfaces en bois Download PDF

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Publication number
WO2020144042A1
WO2020144042A1 PCT/EP2019/086364 EP2019086364W WO2020144042A1 WO 2020144042 A1 WO2020144042 A1 WO 2020144042A1 EP 2019086364 W EP2019086364 W EP 2019086364W WO 2020144042 A1 WO2020144042 A1 WO 2020144042A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
sealing layer
substrate
pores
application
Prior art date
Application number
PCT/EP2019/086364
Other languages
German (de)
English (en)
Inventor
Dirk Conrad
Marcel DÜLGE
Tim LOHRSTRÄTER
Didier NOREILLIE
Stefan Rose
Pawel Salamonowicz
Original Assignee
Hesse 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 Hesse Gmbh & Co. Kg filed Critical Hesse Gmbh & Co. Kg
Publication of WO2020144042A1 publication Critical patent/WO2020144042A1/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
    • 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
    • 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
    • B05D1/40—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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/02—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a matt or rough 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
    • 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
    • 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
    • B05D2203/00—Other substrates
    • B05D2203/20—Wood or similar material
    • 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
    • B05D2252/04—Sheets of definite length in a continuous process
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/04—Flooring or floor layers composed of a number of similar elements only of wood or with a top layer of wood, e.g. with wooden or metal connecting members

Definitions

  • the present invention relates to a method for applying paints to wooden surfaces with rollers.
  • Varnish can be applied to wooden surfaces (solid wood, veneered wood materials) using different methods. Both spraying, casting and rolling processes are known, particularly in the field of coating application on an industrial scale. Spraying methods are used most frequently, since all shapes and colors can be processed. Disadvantages such as high paint losses etc. are accepted.
  • spraying methods are used most frequently, since all shapes and colors can be processed. Disadvantages such as high paint losses etc. are accepted.
  • essentially flat and less shaped substrates pass through a paint curtain in order to ensure a uniform application of paint. This process is used, for example, to achieve high-quality, smooth topcoat applications, for example in the industrial manufacture of doors and furniture fronts.
  • Roller application processes are used in the coating of flat substrates. The paint is typically applied to the substrate using a rotating rubber roller (applicator roller).
  • the dosing takes place with the aid of a dosing roller and / or by adjusting the contact pressure of the rubber roller or the gap width between the dosing and application roller.
  • the coating application can be carried out in the same or opposite direction in the case of roller application processes. Both systems can also be used in combination.
  • the lacquer is applied to the substrate, so that in particular wood pores and veneer joints are filled.
  • the applied lacquer layer is optimally smoothed, so that high-quality, structure-free, smooth surfaces are obtained.
  • the object of the present invention is therefore to provide a method for coating substrates, in particular wood or wood materials, with open pores and / or structuring, in which the pore structure or the structuring remains optically visible even after coating, although the pores are sealed with a closed lacquer film and protected against the ingress of moisture or dirt or all areas of the structured surface are sealed with a closed lacquer film.
  • the present invention relates to the coating of substrates with open pores, whereby the pores are filled with lacquer in such a way that they meet the requirements for a lacquered wooden surface (for example DIN EN 68861-1 furniture surfaces, behavior in the event of chemical stress), but nevertheless optically open pore structure remains visible.
  • Figures 1 a) and 1 b) schematically show partial areas of a paint application device, suitable for performing the method according to the invention.
  • the invention provides a method for coating substrates (wood or wood materials) as defined in claim 1. Preferred configurations are specified in the subclaims and the description below. Possible applications are the coating of plate-shaped materials with a structured or pore-containing surface, such as parquet, veneered chipboard or fiber board (MDF or HDF board).
  • the wood material of the surface to be coated is preferably oak or ash.
  • the method according to the invention is particularly suitable for coating oak parquet and oak veneers.
  • a possible embodiment of the method for coating substrates with open pores and / or substrates with a structured surface can be the following
  • Process steps include: a) providing a substrate with open pores and / or a structured surface, b) applying a sealing layer, preferably by means of rollers A and / or B (as in a spatula or reversing machine) or b1) by only one roller A, this roller A particularly preferably has a Shore A hardness of 80 or less, or b2) by a combination of roller A with a Shore A hardness of 80 or less and then one
  • roller A and roller B Combination of roller A and roller B, c) partial removal of the sealing layer from the pores and / or from the structured surface by means of at least one roller C, and d) treatment of the sealing layer with a brush roller.
  • this method can include the following method steps: a) providing a substrate, in particular in the form of a carrier plate made of wood or wood-based material, with open pores and / or a structured surface.
  • a sealing layer can be applied to such a substrate.
  • the term “sealing layer” denotes, for example, a lacquer layer that completely protects the substrate, for example against the influence of water.
  • a formulation of a suitable composition is usually applied, which after an additional treatment, such as curing, gives the final sealing layer.
  • the metering of the material for the sealing layer can be carried out by the metering roller also shown in FIG. 1 a) (roller D in the figure to the left of roller A).
  • This roller A can be designed as specified in the claims, ie in accordance with one of the variants b), b1) and b2).
  • the sealing layer is preferably distributed by means of a roller B, as a result of which, in particular, the wetting of the wood pore down to the depth can be improved by excess sealing material.
  • this trowel roller B is shown to the right of the application roller. As shown schematically, this roller is preferably provided in the immediate vicinity of roller A. As an alternative or in addition, this roller can already serve to remove part of the applied material of the sealing layer.
  • a combination of application roller, roller A and B is also known as a spatula machine.
  • a reversing machine can also be used at this point.
  • This roller shown in Figure 1 b), is preferably designed as a smooth roller.
  • a metering roller can preferably be provided in combination with roller C, the application quantity of the material for the sealing layer being particularly preferably set such that only a minimal application is carried out, so that in total material is removed.
  • the direction of transport of the substrate is indicated by the arrow.
  • the brush roller is generally any roller with a highly structured surface and preferably material sections protruding from the surface. Brushes are particularly preferably arranged on the surface of the brush roller, and very particularly preferably the surface of the brush roller is formed exclusively from brushes.
  • a preferred brush roller is formed from a natural fiber material, in particular from sisal or as a sisal brush, and / or from a plastic material. f) curing the sealing layer, for example with UV light.
  • the amounts of material to be applied for the sealing layer depend on the viscosity of the lacquer, the feed speed of the rollers and / or the absorbency or porosity of the substrate. It is essential to use the roller C in order to remove material for the sealing layer which has penetrated into the pores before the hardening, in order to make the structure / open porosity visible without adversely affecting the sealing. In the context of the investigations leading to the present invention, it has been shown in this connection that the use of roller C is of particular importance (and not the amount of application that ultimately remains), since, for example, comparative investigations only with roller A and / or with roller A and B ( with the same remaining application quantity) does not show the effect according to the invention.
  • Suitable materials for providing a roller A with a Shore A hardness of less than 80, preferably less than 20, particularly preferably less than 10 are, for example, elastomers or thermoplastics, optionally adapted through the use of suitable additives, such as plasticizers, these preferably being applied Material for the sealing layer must not interfere, so as to result in a sufficiently soft surface.
  • the substrate provided is preferably made of oak or a wood material with a wooden surface made of oak, in particular veneer. Alternatively, it can also be ash or a surface made of ash, in particular veneer. Before the lacquer application, however, this can also preferably be subjected to any other surface treatment described here, such as a grinding treatment, for example raw wood sanding, in particular with a grain size of 120, 150 and / or 180.
  • the surface to be coated can also be coated with an adhesive primer or a Be treated beforehand.
  • a sealing layer in particular a UV-curing lacquer, preferably with a typical lacquer application quantity of 10-200 g / m 2 , particularly preferably 60 to 120 g / m 2
  • a spatula appliance roller A and spatula roller B
  • This application of material is also referred to here as the application of a material for the sealing layer.
  • the surface is coated with a lot of excess material (lacquer), so that the pore is sealed.
  • the second roller B ensures that a sufficient amount of the lacquer penetrates into the pores.
  • this second roller only serves to ensure the penetration of the material for the sealing layer into the pores of the substrate.
  • this treatment is preferably carried out in such a way that at the same time a certain amount of the applied lacquer is removed again. In this preferred embodiment, about 10% to 40%, preferably 15% to 25%, of the coating amount applied by roller A is removed again. This ensures sufficient wetting of the pores, but at the same time ensures the desired lively structure of the coated substrate.
  • Such a removal of part of the applied amount of lacquer can be carried out by a spatula roller, which is also particularly suitable for achieving the penetration of the material for the sealing layer into the pores.
  • the spatula roller is particularly preferably designed with suitable further devices in order to absorb the removed amount of lacquer or the removed material for the sealing layer and in particular to prevent it from coming into contact with the substrate again.
  • the amount of material to be applied for the sealing layer is as described above under b). This also applies to variant b2) according to the invention, in which the total application quantity is applied by the different rollers A and, if appropriate, also roller B.
  • the further, ie in addition to removal by roller B, partial removal of the sealing layer from the pores is preferably carried out by means of at least one roller, in particular a smooth roller C.
  • This is typically set such that it uses the same material, for example a UV-curing lacquer, how the application roller applies, but is set to the smallest or smallest possible application quantity. This effectively removes excess material from the pores and the pore Structure of the wood visible again.
  • a first amount of the material for the sealing layer has already been removed again by roller B
  • about 5% to 30% of the original application amount is preferably by means of roller C, in particular by roller A and particularly preferably 10% to 20 % away. If no material has been removed by roller B, the amount of material to be removed by roller C can also be higher. Suitable percentage values for this material removal are preferably 15% to 70% and particularly preferably 25% to 45%.
  • roller C In general, it is preferred that either 15% to 70% and particularly preferably 25% to 45% of the originally applied amount of material for the sealing layer is removed again by roller C alone or by rollers B and C together.
  • a second roller C can also be provided, it being possible for the amounts of material to be removed by the rollers C to be the same or different. If, for example, 2 rolls C are used, these are preferably set such that the percentage values for the material removal are cumulated as described above.
  • the rollers C can be adjusted so that the same amounts are removed by both and in particular by all the rollers C. However, it is also possible for different amounts to be removed. It is preferred if the first roller C removes more material than the second and / or each additional roller C.
  • sealing layer In addition to the sealing layer, further layers can also be applied, such as topcoat layers, effect lacquer layers, etc. These are preferred after complete curing applied to the sealing layer.
  • additional treatments An example of this is a matting treatment, which is preferably carried out before the layer has fully hardened. This is preferably carried out using a 172 nm excimer laser. This has the advantage that matting, which is based on the microstructuring of the surface of the treated layer, takes place without the use of matting additives.
  • matting treatment is suitable for materials, for example for the sealing layer, which are reactive towards the laser, for example acrylates, which show a crosslinking reaction with such a treatment.
  • Matting with an excimer laser also has the advantage that this step can be combined well with curing by UV radiation etc. Such matting also results in very reproducible, identical surface properties.
  • the matted surfaces obtained are often particularly pleasant with regard to their Haptic, advantageous with regard to anti-fingerprint properties and very good matting effect can be set with very low gloss levels.
  • the sealing layer is cured in a conventional manner, e.g. B. with UV light and preferably by means of a mercury lamp, especially with 80-
  • Lacquers of this type and thus curing with UV light are preferred, since a hard-wearing, solid lacquer film can be obtained very quickly. Curing can vary when using other types of lacquer; for example, thermally curing lacquers can be cured by means of IR radiation.
  • An adhesive primer (eg Hesse HUW 8831) with a coating quantity of 10-15 g / m 2 is applied to oak parquet (finished, sanded 180, dedusted), then it is completely dried.
  • a roller A applies a UV lacquer (for example Hesse UG 7328) at an application rate of 50 g / m 2 .
  • Using a spatula roller B removes 10-15 g, but at the same time ensures a good penetration depth of the applied lacquer into the pores, so that an application amount of 35-40 g / m 2 remains, which made the pore structure partially visible, but not yet a sufficient degree.
  • a further 5-10 g / m 2 are removed by using a smooth roller C, so that a coating amount of 30 g / m 2 remains.
  • the layer is then treated with a sisal roller.
  • the pore structure is then particularly clearly visible. This is followed by curing by UV radiation (3 Hg emitters with 80 W / cm) at 18 m / min feed. Doing so will be a high quality Obtain paint coating with the pores sealed but the pore structure visible as desired.
  • a comparative example with a paint application of 30 g / m 2 in a process without the use of a smooth roller (same amount of coating) showed an inadequate and uneven paint coating.
  • a reliable sealing of the pores could not be achieved and the open-pore structure was not evenly visible as desired.
  • a completely smooth lacquer film was obtained in some cases, which left no pore structure visible.
  • the sealed parquet was evaluated with regard to the sealing of the pores to ensure that the parquet treated in this way not only leaves the pore structure visible, but also enables a reliable and complete sealing.
  • test results showed no staining of the pore by methylene blue solution and no discoloration (wetting) of the wood after the water test, e.g. for 16 h. This proves reliable and complete sealing down to the depths of the pores.

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

Abstract

L'invention concerne un procédé de revêtement de substrats à pores ouverts et/ou de substrats pourvus d'une surface structurée.
PCT/EP2019/086364 2019-01-08 2019-12-19 Application au rouleau de vernis sur des surfaces en bois WO2020144042A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19150746.6 2019-01-08
EP19150746.6A EP3680028B1 (fr) 2019-01-08 2019-01-08 Application au rouleau des peinture sur surfaces en bois

Publications (1)

Publication Number Publication Date
WO2020144042A1 true WO2020144042A1 (fr) 2020-07-16

Family

ID=65010606

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/086364 WO2020144042A1 (fr) 2019-01-08 2019-12-19 Application au rouleau de vernis sur des surfaces en bois

Country Status (3)

Country Link
EP (1) EP3680028B1 (fr)
PL (1) PL3680028T3 (fr)
WO (1) WO2020144042A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1029380B1 (nl) * 2021-05-05 2022-12-05 Decospan Werkwijze voor het behandelen van houten panelen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005025826A1 (fr) * 2003-09-18 2005-03-24 Groupe Bob, Inc. Procede et systeme de production industrielle de planches en bois pre-huilees
DE102004007503B3 (de) * 2004-02-13 2005-09-29 3H-Lacke Lackfabrik Hammen Gmbh & Co. Kg Verfahren und Vorrichtung zur Beschichtung von Elementen aus natur- und/oder holzfaserhaltigen Werkstoffen mit Lacksystemen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4971126B2 (ja) * 2007-12-26 2012-07-11 富士フイルム株式会社 液体塗布装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005025826A1 (fr) * 2003-09-18 2005-03-24 Groupe Bob, Inc. Procede et systeme de production industrielle de planches en bois pre-huilees
DE102004007503B3 (de) * 2004-02-13 2005-09-29 3H-Lacke Lackfabrik Hammen Gmbh & Co. Kg Verfahren und Vorrichtung zur Beschichtung von Elementen aus natur- und/oder holzfaserhaltigen Werkstoffen mit Lacksystemen

Also Published As

Publication number Publication date
PL3680028T3 (pl) 2022-07-25
EP3680028A1 (fr) 2020-07-15
EP3680028B1 (fr) 2022-04-06

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