CZ137695A3 - Process of applying surface layers for achieving the appearance of root wood imitation - Google Patents

Abstract

Surface coating processes for producing an imitation root timber effect comprise (A) (1) applying a layer of filler with a colour which determines the base shade of the final effect; (2) air-drying the filler coat; (3) preparing a soln. of scumble paste in water; (4) applying this soln. to the filler coat; (5) trickling or spotting alcohol, spirit, isopropanol, acetone, EtOAc, etc., onto the still-wet scumble coat to form the root timber pattern; (6) drying rapidly; (7) applying and drying opt. coloured clearcoat(s); and (8) applying clear topcoat(s); (B) (a) performing stages (1)-(4) as above; (b)(5) sprinkling salt grains on the still-wet scumble to form the pattern; and (c) performing stages (6)-(8) as above; (C) to produce the effect on glass, (1) cleaning and degreasing a glass plate, etc.; (2) coating with an adhesive clear varnish or transparent adhesive and drying this; (3) applying a scumble coat as in (A) and (B) stage (4); (4) forming the pattern as in (A)(5) and drying this; (5) coating with an acrylic scumble coloured to match the shade of the first scumble (3); (6) applying a primer paint coloured to match the ground colour of the imitation root timber layer; and (7) applying a coat(s) of protective varnish.

Description

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a method of applying surface layers to achieve the appearance of a root wood imitation.

BACKGROUND OF THE INVENTION

For environmental and environmental reasons, the use of natural root wood is increasingly restricted, for example in the manufacture of vehicles.

Irrespective of this, there is a great need for surface finishes corresponding to the root wood, for example on the surface of plastic products, on molded products and on products made by casting or injection molding.

It has previously been proposed that the plastic adhesive foils be printed on one side with an imitation of root wood, and these foils are then adhered to the surface of plastic or metal products, the appearance of which is thus optically improved. Problems with this process arise in particular when the curvature, corners and edges of complexly shaped plastic products are to be bonded. In addition, the described process requires extremely careful handling of the self-adhesive film, which implies high manual dexterity, so that automated production of complexly shaped articles is almost impossible.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide such a coating method for obtaining the appearance of a root wood imitation which permits both coating on complex structured and shaped surfaces and a rational automated production.

SUMMARY OF THE INVENTION

The problem is solved and the drawbacks of the known methods of this kind largely eliminate the method of applying the surface layers to achieve the appearance of the root wood imitation according to the invention, which is characterized in that the method consists of the following operations: the basic color tone of the later imitation; drying of the filler layer; preparing a water-based pasty glaze; applying a pasty glaze solution to the filler layer; dropping or spot-coating an alcohol, denatured alcohol, isopropanol, acetone, ethyl acetate or the like onto a still non-dried paste glaze layer to form a root wood pattern; rapid drying of existing layers; applying at least one transparent lacquer layer, optionally a tinted transparent lacquer, and drying it, and finally applying at least one transparent lacquer covering layer.

Another preferred variant of the method according to the invention is that the method consists of the following operations: applying a filler layer, wherein the color of the filler layer determines the base color tone of the later imitation; drying of the filler layer; preparing a water-based pasty glaze; applying a pasty glaze solution to the filler layer; locally depositing grains of salt on a still dry layer of dough glazing to form a root wood pattern; rapid drying of existing layers; applying at least one transparent lacquer layer, optionally a tinted transparent lacquer, and drying it, and finally applying at least one transparent lacquer covering layer.

To achieve a brownish texture of the root wood, the color of the filler layer is beige and at least the transparent lacquer layer is colored beige to brown.

It is preferred that the glazing cover is diluted so thin that the flow time through the container according to DIN is 10 to 18 seconds, preferably 12 to 15 seconds.

The dough glazing solution is applied by spraying or spraying, and after dripping or application of wood root imitation materials, the formed layers are rapidly dried in a continuous oven at a temperature of about 60 degrees C for about 2 minutes.

Instead of a pasty glaze, water-soluble casein paints may also be used.

It is advantageous here that the thickness of the paste glazing or the casein color layer is adjustable in the later color and the structure of the root wood imitation.

The paste glazing layer is preferably spray applied and the glazing layer is subsequently overcoated in order to achieve different layer thicknesses and structural distribution of the dissolved components in the paste glazing layer, thereby altering the appearance of the wood imitation.

and

Thus, the basic idea of the invention is that, in contrast to the known methods of forming a wood-like coating, a special spraying technique is used, which can also be applied in known coating lines.

According to the invention, after the application of the filler layer, which determines the base color tone of the later imitation layer, after a brief drying of the layer, by spraying or painting, a paste-like paste glaze is applied. Alcohol, isopropanol, acetone, ethyl acetate or the like are then applied to the still dough layer of the dough glazing by dropping or spot spraying, or grains of salt or coarse salt are applied to the still dough layer. In this operation of the method according to the invention, a texture that is typical of root wood is produced. The resulting structure is then quickly dried to a state in which it is possible to apply further layers of varnish. Prior to the application of the transparent lacquer coating, at least one color-tinted transparent lacquer, the color of which is chosen according to the color of the natural wood, can still be preferably applied. This coloring further emphasizes the plastic character and special structure of the root wood.

DETAILED DESCRIPTION OF THE INVENTION

The invention is further illustrated by the following non-limiting examples.

In a first embodiment, the starting material is a plastic material which is initially briefly surface etched and optionally also provided with a base layer. After drying, the filler is applied, the color tone of which determines the base tone of the wood imitation later formed. In the first embodiment, the base color tone of the filler is beige.

Simultaneously with a large amount of water, a brown, initially pasty or pasty glaze is mixed so that it is thin to the point that it flows through the DIN container in 12 to 18 seconds. The preparation of the pasty glaze is very important for the later created pattern of root wood imitation. The prepared pasty glaze is then sprayed or painted onto the filler layer.

Denaturated alcohol is freely sprayed or dripped irregularly before drying the dough layer. It is also possible to apply individual drops of denatured alcohol using a pipette.

It has been shown that instead of denatured alcohol or alcohol, gasoline, isopropanol, acetone, ethyl acetate and the like can also be dropped.

This dripping results in displacement of the components of the pasty glazing, resulting in a typical root wood structure.

The formation of said structure can be influenced by the amount of denatured alcohol applied and the like, as well as the degree of drying of the pasty glazing.

The described process is followed by drying the deposited layers, for example in a continuous furnace at 60 degrees C for about 2 minutes. It has proved to be advantageous if this drying process is carried out quickly and without interruption.

After drying, a tinted transparent lacquer is applied, for example a one-component transparent lacquer with a coloration, in order to further improve the character of the wood imitation. In a first embodiment, a brown paste glazing and a brown-tinted transparent lacquer layer are applied to said beige filler.

It turned out that gray tinting results in a cool rootwood tone, while brown tinting results in a warmwood tone.

Similarly, any color tone can be achieved, such as bright pink, dark pink, light or dark blue, yellow, orange, or intermediate-hue. Similarly, metallic paint and polychrome or opalescent coloring have been successfully tested.

For a more saturated coloration, a layer of tinted transparent lacquer can be applied three to five times. It should be noted at this point that the layers of the tinted transparent lacquer and the subsequently applied topcoats, which preferably consist of a two-component acrylic lacquer, substantially determine the durability of the surface thus obtained.

The application of the actual coating layer (s) is carried out in a manner known per se, whereby grinding is optionally carried out between the individual coatings. As a result, a substantially vitreous coating is formed which determines the corresponding exterior appearance of such coated articles.

It should be noted at this point that in addition to plastics, other materials, such as metals, can be surface-treated in the manner described above.

In a second embodiment, the preparation of the substrate and the application of the water-dilute paste glazing are carried out in the same manner as in the first example. Sprayed or dripped gasoline onto the Fresh Substrate, that is to say a still-dry layer of dough glazing, creates a marbled substrate. Immediately thereafter, alcohol or high-percentage alcohol is sprayed or dripped again dosed. All subsequent operations are then carried out analogously to the first embodiment.

In particular, the plastic effect of the wood imitation structure is achieved by the method of this second embodiment.

Generally, it can be noted that large drops of alcohol result in large patterns of the root pattern. The amount and / or distribution of these patterns can be specifically influenced by the amount of alcohol or the like applied on or in the corpus of the pasty glazing.

In a third embodiment, instead of a pasty glaze that is dissolved in water, a water color, for example Magiccolour, is painted or painted. The denatured alcohol is then dripped onto the prepared surface which has not yet dried up or, if necessary, applied by pipette or by other suitable means. In this case, the wood material structure is formed.

In the fourth embodiment, the procedure is the same as <

in the first exemplary embodiment, including the coating of the paste glaze, but instead of denatured alcohol or the like, the hitherto non-dried paste glaze layer is sprinkled with coarse salt.

In this case too, the structure of the root wood is formed, but it is finer. This structure is then further processed as described in connection with the first exemplary embodiment.

As a whole, the formation of a wood imitation pattern or wood-imitating structure can be said to be sprayed locally and irregularly with spot and irregular spots in the water-soluble, in particular paste-like layer of glazing, optionally with alcohol, gasoline, isopropanol, acetone, ethylene acetate or the like.

The rapid drying process is followed by further processing to improve the properties of the already existing structure and achieve sufficient durability. The method according to the exemplary embodiments has been successfully tested on various substrates, for example wood, wood substitutes, metals, plastics, polyester and the like. In order to ensure sufficient adhesion of the individual layers, in particular the filler layer, a basic surface treatment, selected according to the starting material, is nevertheless required.

It should also be noted that the application of the paste glazing or casein inks is carried out in a very thick layer, which results in a particularly uneven structure, which optically resembles the structure of natural root wood.

Claims (9)

PATENT CLAIMS What is claimed is: 1. A method of applying surface layers to achieve the appearance of an imitation root wood, comprising the steps of: applying a filler layer, wherein the color of the filler layer determines the base color tone of the later imitation; drying the filler layer; preparing a water-based pasty glaze; applying a pasty glaze solution to the filler layer; dripping or spot-coating an alcohol, denatured alcohol, isopropanol, acetone, ethyl acetate or the like onto a still non-dried layer of dough glazing to form a root wood pattern; rapid drying of existing layers; applying at least one transparent lacquer layer, optionally a tinted transparent lacquer, and drying it, and finally applying at least one transparent lacquer covering layer. 2. A method of applying surface layers to obtain the appearance of an imitation root wood, comprising the steps of: applying a filler layer, wherein the color of the filler layer determines the base color tone of the later imitation; drying the filler layer; preparing a water-based pasty glaze; applying a pasty glaze solution to the filler layer; locally applying grains of salt to a still non-dried layer of dough glazing to form a root wood pattern; rapid drying of existing layers; depositing at least one layer 10 transparent lacquer or tinted transparent lacquer and drying thereof and finally applying at least one transparent lacquer coating. Method according to claim 1 or 2, characterized in that the color of the filler layer is beige in order to achieve a brownish rootwood structure and at least the transparent lacquer layer is colored beige to brown. Method according to one of the preceding claims, characterized in that the coating glazing layer is diluted so thin that the flow time of the container according to DIN is 10 to 18 seconds, preferably 12 to 15 seconds. Method according to one of the preceding claims, characterized in that the dough glazing solution is applied by brushing or spraying. Method according to any one of the preceding claims, characterized in that after the dropping or application of the materials for imitating the root wood, the formed layers are rapidly dried in a continuous furnace at a temperature of about 60 degrees C for about 2 minutes. Method according to one of the preceding claims, characterized in that water-soluble casein dyes are used instead of the pasty glazing. A method according to any one of the preceding claims, characterized in that the thickness is pasty - 11 glazing or casein color layer is adjustable in later color and structure of the wood root imitation. Method according to claim 1 or 2, characterized in that the paste glazing layer is spray applied and the glazing layer is subsequently overcoated in order to achieve different layer thicknesses and structural distribution of the dissolved components in the paste glazing layer, thereby altering the appearance of wood imitation .