WO2019074400A1 - Method for producing an artistic decorative coating on the surface of flat cork panels - Google Patents

Abstract

The invention relates to a manual method for producing decorative images allowing multi-coloured and/or multi-toned surfaces to be produced on the surfaces of flat cork panels and also flat panels having a front surface made of a cork material, and can be used in the field of interior decoration. The invention includes applying a dye, and drying between applications, wherein a decorative coating is produced on a pre-cleaned and polished surface of a cork board by consecutively applying a dye and applying a shear force to the damp dye coating using hand tools to produce an image, wherein the dye used is a water-based wood stain on an acrylate base, and, after application of the dye, drying is carried out for 0.5-3 hours at an ambient temperature of 20°С - 25°С and a humidity of no more than 65%.

Description

 METHOD OF OBTAINING ART

 DECORATIVE COATING ON THE SURFACE OF FLAT PANEL PANELS

 The invention relates to a manual method of obtaining decorative images, allowing to obtain multi-color and / or multi-colored surfaces on the surfaces of flat cork panels, as well as flat panels, the front surface of which is made of cork material and can be applied in the field of interior decoration.

 Prior art

 At present, when finishing buildings and interior premises, environmentally friendly materials are in demand. One of these materials is a cork, which has a number of positive properties, such as sound insulation, elasticity, durability.

 Cork material does not cause allergic conditions, does not accumulate substances harmful to humans, cork coatings are not adapted for the life of insects.

 Cork, or cork oak bark has unique properties, due to the fact that it is ~ 90%, consists of air enclosed in airtight cavities made of durable and elastic material, retains its elasticity and recoverability under heavy loads, even in hostile environments.

 The cork structure is similar to honeycombs from millions of multi-layered cells (approximately 40 million per cm3) that are not permeable to water and filled with a gaseous mixture of nitrogen and oxygen.

 Chemical composition of cork:

• suberin (about 43%) - is responsible for elasticity and adhesive properties; • lignin (about 30%) - is responsible for the density of the plug;

 • polysaccharides (about 10%) - determine the topography of the cork structure;

• tannins (8%) - responsible for color;

 • ceroids (5%) - provide water resistance.

 Cork oak bark is a natural material that contains tannin, the concentration of which is never exactly the same, therefore, despite the use of special substances as a barrier that blocks tannin, paint penetration into cork veneer does not always occur evenly, and the result depends largely on natural factors affecting cork oak during the period of formation of the bark.

 Cork panels are made of crushed bark granules, pressed into blocks at temperatures above 350 ° C without adding glue, then cooled with steam and then stabilized for at least two weeks, and only then are they cut into panels of various thicknesses. Cork oak bark contains a natural binder - suberin.

 Cork panels can be pressed into blocks with a large-pore cork or a small-cored cork with the application of the top layer in the form of natural cork veneer with a thickness of 0.4-1.0 mm.

 The top cork layer in the form of cork veneer with a thickness of up to 3 mm may also contain laminated plates, where the middle layer is MDF, chipboard, fiberboard, fiber board, polymer layer and bottom cork layer.

There are enough materials to apply a decorative image to which is problematic. These include cork material. The application of a decorative image on such a material is traditionally carried out with preliminary preparation of the surface for the subsequent application of a decorative image. It is possible to apply a decorative coating on the surface of the cork in various ways.

 Known methods of coating the surface of cork material using UV printing.

 A known method of manufacturing a floor panel (RF patent N ° 2529239 from 09.02.2012, convention priority: 02.22.2011, DE 10201 1012015.7, publ. 05.27.2014) containing a base plate, cork layer, primer and decorative layer. The method consists in the fact that for the formation of soil a cork layer is applied with a liquid lacquer system with a fraction of volatile components of a maximum of 10% by volume and a decorative layer is applied and / or rolled over the soil.

 Before applying the lacquer system for the formation of soil cork layer is heated to a temperature of 40-60 ° C, mostly to about 50 ° C.

 Printing decor occurs through the printing device, which is sent along the surface and can be made in the form of a printing cylinder.

 The known method of applying a decorative layer on the cork surface is long. The decorative layer is applied to the cork surface by means of printing cylinders and on a previously applied primer layer.

There is a method of applying UV printing on the surface of flat cork panels (RF patent N ° 2592342 dated 03.06.2015), which includes carrying out a preliminary stage of preparing a graphic composition using a processor and appropriate software, and printing a multi-color image on panels using an inkjet printer having heads with nozzles emitting microdroplets of the desired color onto the surface to be printed, and the processor controls the printer, while Printing is carried out by applying to the surface of the cork panel a semi-priming layer, which is formed by applying the first layer of printing with double the volume of white ink with the print head extended relative to the other printing heads, with successive drawing of the double volume of color ink to obtain a decorative printing layer.

 Known methods of applying a decorative image using UV printing are complex, and they also involve applying a coating layer to the material to be polymerized, which negatively affects the environmental properties of the material.

 Known decorative board and method of its manufacture according to patent EP0294825 from 1987.06.12 publ. 1988.12.14

 The decorative board contains a cork board formed from a chipped cork bound by a binder resin and a coating layer formed on said cork board formed by applying an opaque coating material containing a resin component and a pigment on the cork board to create a marble pattern according to the difference in the absorbent abilities of different parts of the specified base.

 The resin used is preferably acrylic or urethane resin.

 A disadvantage of the known solutions is also the deterioration of the environmental properties of the material.

 DISCLOSURE OF INVENTION

The present invention is to develop a manual method of applying decorative images, allowing to obtain multi-color and / or multi-colored decorative surfaces on the surfaces of flat cork panels, as well as flat panels, the front surface of which is made of cork material in large quantities, without resorting to a complex method of printing or time-consuming manual drawing while maintaining the environmental properties of the material to be coated.

 The technical result is to simplify the process, reduce the cost of the finished product and preserve the ecological properties of the material, as well as ensure the production of any decorative surfaces, including imitation of natural wood texture, bamboo texture, canvas (linen fabric - pattern of coarse linen threads) on the finished product .

 The technical result is achieved by the fact that the method of obtaining an artistic decorative coating on the surface of flat cork panels includes painting, interoperative drying, while the decorative coating is carried out on the previously cleaned and ground surface of the cork board by applying the dye and applying a shift to the wet coating of the dye by hand tools to obtain an image , waterborne acrylic based stain is used as a dye, while drying after application of the dye was carried out for 0.5-3 hours at temperatures between 18 ° C -35 ° C and humidity not more than 65%.

 By imitation is meant reproduction of the texture and color of valuable wood or other materials on the surface of less valuable materials.

The dye is designed to completely visually smooth the surface of the cork panel. This means that both the color and the texture of the cork panel surface are covered with a dye and a new surface is created, unlike the original one. Any decorative effect is created solely due to the characteristics of the paint layer (color, gloss, texture, etc.). The decorative effect is created by combining the characteristics of the cork surface onto which the product is applied and the properties of the product itself.

 In the claimed technical solution, a water-borne liquid stain on an acrylate basis with a density of 1, 0-1, 1 kg / l, which is an environmentally friendly dye, is used as a dye.

 This stain quickly dries, has good air and vapor permeability.

 High pigment content provides richer colors and greater opacity.

 Reducing the content of the binder and (or) pigment allows to achieve opposite properties - lighter translucent shades.

 A water dispersion of acrylates is used as a binder. Liquid water-borne stain on an acrylate basis is applied with a roller. This method provides a more uniform application than with a brush, helping to avoid stains.

The approximate consumption of a liquid water-borne stain on an acrylate basis on the first layer is approximately 150-200 ml / m2. The drying time of a water-borne acrylic-based stain directly depends on the temperature and humidity of the surrounding air.

At an ambient temperature of + 20 ° C and a humidity of 65%, the drying time is 0.5-3 hours. The implementation of the invention

 To obtain a coating that simulates the natural texture of wood, a water-borne acrylic-based stain is used as a dye, hand tools: a paint roller,

b a brush from an artificial bristle, a brush from a natural bristle, a metal comb with wide or narrow teeths, a rubber rocker (rub) (figure 1) for imitation of texture of a tree, having an arched surface with semicircular / semi-oval concentric recesses made on it.

Example 1

 Wood texture imitation:

 To create a coating, the first layer of dye is applied to the pre-cleaned and sanded surface of the cork board - liquid water-borne stain on an acrylate basis with a density of 1, 0-1, 1 kg / l with a paint roller and immediately a pattern is applied over the layer of dye, for which the whole rocker plane is slowly applied and in a continuous motion pulled over a wet surface, rocking the rocker back and forth. Simultaneous pulling with swaying with application of shear force to the paint - stain creates elongated oval traces. The position of the remaining track depends on the position of the rocker. Thus, it is possible to change the distance between the oval tracks.

 Next, the surface is brushed with natural bristles, causing narrow winding strips, imitating continuously stretching wood fibers.

 After applying the coating layer, the board is naturally dried from 1, 5 to 3 hours at ambient temperature within (+ 20 ° С - 25 ° С) and humidity not more than 65%.

Perhaps a similar re-application of the same pattern in the same technique to the first pattern obtained, depending on the desired wood imitation of a particular type of wood and texture color. The color of the stain is chosen accordingly for imitation of a certain type of wood.

 Quantitative use of the dye is determined empirically, based on the conditions for the preparation of the tone palette of the dye.

 On the surface of the cork material get a realistic picture imitating the texture of wood.

 After complete drying, a protective varnish is applied with a clear water-based varnish.

 The sample is presented in figure 2.

Example 2

 Bamboo texture imitation:

 To create a coating on the previously cleaned and sanded surface of the cork board, the first layer of dye-liquid stain is applied with a paint roller. Pirtti Panel Stain stain was used as a dye. With a comb, across the entire width of the board, flat strips are made imitating the stretching bamboo fibers, allowed to dry, then swept along the surface with a brush, simulating thinner stretching bamboo fibers and dried naturally from 1,5 to 3 hours at ambient temperature within (+ 20 ° C - 25 ° C) and humidity not more than 65%.

 The sample is shown in FIG.

Example 3

 Imitation of canvas texture (bulk braid)

To create a coating on the previously cleaned and sanded surface of the cork board, the main first layer of the dye is applied - a liquid stain with a paint roller. Pirtti Panel Stain stain was used as a dye. The comb across the entire width of the board spend smooth stripes. After drying for the conduct of perpendicular to the strip held the same flat strip.

 To create a volume, they change the color of the base, superimposing a layer of a different color on a layer of one color after combing. Checkered two-color pattern (or ornament) is obtained by crossing the threads of two colors. At the same time, when the threads intersect, it turns out a cell of a different shade.

 Thus, they achieve the visual effect of linen fabric. The pattern of weave of coarse linen threads is so believable that it gives the impression of a real canvas.

 Samples are shown in photo 4.

Example 4

 Imitation of aged wood:

 To obtain the visual effect of aged wood on the surface of the cork panel, select the cork panel that already has “flaws”: sinks, notches. Conduct consistently the same methods of applying the dye, as in the method of imitation of wood texture (example 1). After that, the surface of the sand in certain places, creating the effect of wear.

 Samples are shown in photo 5.

Example 5

The cork contains tannin, which, when released, causes staining on the painted surface. To obtain a high-quality coating, before applying a light-colored coating layer (Examples 1-4) to the cork, a water-based varnish layer was applied. This prevented the appearance of stains on the painted surface. A decorative image that imitates with a high degree of accuracy the natural texture of wood, the texture of bamboo and canvas, as well as the pattern or color formed on its surface simply with the formation of a coating layer with a water-borne acrylic paint on a corkboard will be widely used.

 Decorative coating, obtained by the present invention, is simple to apply and environmentally friendly.

Yu

Claims

CLAIM  1. The method of obtaining artistic decorative coatings on the surface of flat cork panels, including staining, interoperational drying, characterized in that the decorative 5, the coating is carried out on the previously cleaned and sanded surface of the cork board by applying the dye sequentially and applying a shift to the wet dye coating using hand-held tools to obtain an image, using a water-soluble stain on an acrylate basis, while drying after applying the dye is carried out within 1-3 hours at ambient temperature within 20 ° С -25 ° С and humidity not more than 65%.  2. The method of obtaining artistic decorative coating on the surface of flat cork panels according to claim 1, characterized in that 15 before applying a layer of dye of light colors apply a layer of clear water-based varnish.  3. A method of obtaining an artistic decorative coating on the surface of flat cork panels according to claim 1, characterized in that a rubber eraser (rocker) is used as hand tools, 20 brush, comb.  4. A method of obtaining an artistic decorative coating on the surface of flat cork panels according to claim 1, characterized in that Pirtti Panel Stain stain is used as a dye.  5. The method of obtaining artistic decorative coating on 5 surfaces of flat cork panels according to claim 1, characterized in that the coating layer is applied repeatedly. 5. The method of obtaining artistic decorative coating on the surface of flat cork panels according to claim 1, characterized in that after complete drying of the applied coating, a protective lacquering is applied with a clear water-based varnish.