JPH0126880B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention provides a painting having cracks in a mesh pattern,
The present invention relates to a method for producing a decorative plate in the form of a ceramic plate that is rich in elegance and expresses patterns.

Conventionally, this type of decorative board has been widely used for interior decoration of buildings, and is manufactured by the following method.

That is, as shown in FIG.
Alternatively, a base coat 2 is formed on the surface of the base coat 2 after coloring, or an original image member 3 on which a picture, pattern, or color is printed or the like is adhered to the surface of the substrate 1 using an adhesive, as shown in FIG. 1B. , a base coat 2 is formed on the surface thereof, and then a starch glue solution is uniformly applied to the surface of both base coats 2, and the starch glue solution is dried to form a cracking layer 4 with mesh-like cracks 5 appearing on the entire surface. Form. These cracks 5 also reach the base coat 2. Thereafter, if desired, the coloring material 6 is rubbed on the surface of the cracking layer 4 and penetrated into the cracks 5 to emphasize the cracks, and then the excess coloring material 6 on the surface of the cracking layer 4 is wiped off with a cloth or the like. 6 is dried, a transparent top coat 7 is further formed on the surface of the cracking layer 4, and the decorative board A,
Complete A′.

At this time, as the substrate 1, gypsum board, asbestos board, flame retardant board, wood board, board plywood, metal plate, slate, etc. are used, and as the synthetic resin emulsion or paint used for the base coat 2, vinyl acetate, its polymer, styrene, etc. are used. - Mainly water-dispersed emulsions of synthetic resins that form relatively flexible films, such as butadiene copolymers, vinyl chloride-vinylidene chloride copolymers, butadiene-acrylonitrile copolymers, acrylic copolymers, etc., or those synthetic resins. Paint is used as a raw material. The cracking layer 4 is formed using an aqueous solution of starch glue, and the coloring material 6 is oil paint, oil-based paint (containing pigment), dye, or the like. Furthermore, as the top coat 7, a transparent coating suitable for the purpose of use as a decorative board is selected from among lacquer, varnish and other various paints, and water glass.

In the conventional decorative plates A and A' manufactured using the materials and manufacturing methods described above, the width of the colored cracks in the cracking layer 4 further widens, as shown in FIG. Changes over time called ``lag'' occur, such as cracks appearing in certain places. This "backward" 8 further progresses and grows into a crack that reaches the surface of the top coat 7. Therefore, in the conventional decorative boards A and A', cracking layer 4 is directly affected by the external atmosphere (effects of temperature, humidity, etc.) due to cracks in top coat 7, and not only does the cracking progress further. , the starch repeatedly swells and dries, causing the insect-eating phenomenon B shown in Figure 2 B, which not only discolors this part and significantly reduces its aesthetic value, but also causes the laminated structure to peel off. It had Furthermore, conventional decorative board A,
A′ is due to the crack in top coat 7 mentioned above.
Not only was it not used at all for the exterior of buildings, but even for interior applications, its use was restricted in harsh environments with high temperatures, such as baths, and its scope of use was extremely narrow and its versatility was poor.

Therefore, as a result of various studies aimed at obtaining a decorative board that maintains aesthetic value for a long period of time and is rich in versatility by eliminating the "backward" that causes the above-mentioned drawbacks, the present inventor has found that the above-mentioned "backward" This phenomenon can be caused by various factors such as drying atmospheric conditions and coloring materials on the cracking layer, effects during top coat application, effects of residual stress during curing of the top coat, effects of residual stress in the cracking layer, etc. I solved it. However, among the above factors, the influence of . is relatively small, and even if these factors were resolved, it was not possible to completely stop the company from falling behind.

The present inventors have discovered that by solving the above factors, it is possible to completely stop "lag behind" and have completed the present invention.

As mentioned above, when manufacturing decorative plates A and A',
The coloring material 6 is rubbed into the cracks 5 formed in the cracking layer 4, but the degree of the cracks 5 must be kept to an aesthetically desirable level. In this way, in the conventional manufacturing method, instead of waiting for the cracking layer 4 to fully develop cracks 5, the cracking layer 4 is fixed with the top coat 7 in the middle, so internal stress inevitably remains in the cracking layer 4. It is further increased by the curing reaction of the top coat (see Figure 1).

The above-mentioned factor is that the cracking layer 4 causes "backward" over time due to this residual stress.

In the present invention, after rubbing a coloring material into the cracks formed in the cracking layer, an instant adhesive is applied to the surface of the cracking layer and dried to firmly prevent the movement of the cracking layer (the movement that causes "backward"). It is an attempt to fix it.

That is, the present invention provides painting directly onto a plain color or surface;
A transparent film-forming synthetic resin emulsion or paint is applied and dried on a substrate that has a pattern, color, etc. applied to it, or has an original image material showing a painting, pattern, color, etc. on its surface adhered using an adhesive. A starch glue solution was applied to the surface of the base coat, dried to form a cracking layer with moderate cracks on the entire surface, and a desired coloring material was rubbed into the cracks of the cracking layer. The decorative board is manufactured by wiping off the excess colorant, then applying an instant adhesive to the surface of the cracking layer and drying it to form a protective coat that fixes the cracked state of the cracking layer. .

At this time, it is desirable to select an instant adhesive that forms the protective coat with a small volumetric shrinkage during curing (drying) in order to reduce the influence of the aforementioned lag factors. There is an adhesive.

In the above process, the base coat, cracking layer, and colored part are formed using the same material methods as in the past, and if necessary, a protective coat is formed using the above-mentioned instant adhesive material, and then a transparent paint or the like is further applied. A top coat layer may also be formed.

Since the above-mentioned instant adhesive overcomes the residual stress of the cracking layer and more firmly fixes the cracking layer, according to the present invention, it can be used for a long time without causing any deterioration over time such as "backward" or delamination. It is possible to obtain a highly versatile decorative board that retains its aesthetic value over a period of time and can also be used for exterior purposes.

Furthermore, since the cracking layer is quickly fixed with the instant adhesive, it is possible to accurately detect the most desirable cracking state. For this reason, high quality products can be stably supplied without variations in quality due to cracking progressing during the fixing work of the cracking layer.

Examples are shown below.

An adhesive consisting of a water-dispersed emulsion of vinyl acetate is applied to the surface of an aluminum plate (substrate) and dried to form a thin film layer (base coat). After that, an aqueous solution of starch glue is uniformly applied and heated at 80°C.
This glue layer (cracking layer) is dried for about 15 minutes.
A network of cracks appeared on the surface.

Next, rub oil paint (coloring material) onto the glue layer and let it penetrate into the cracks, wipe off the excess paint remaining on the glue layer surface with a cloth, and then apply a cyanoacrylate-based instant adhesive to the glue layer. A protective coat was formed by coating and drying and fixing, and a top coat was formed by spraying a transparent two-component polyurethane paint on top, and changes over time were observed.

All of these decorative boards exhibited no changes over time such as "backing" of the cracking layer or delamination, maintained their aesthetic value for a long period of time, and could be widely used for interior and exterior applications.

[Brief explanation of drawings]

FIGS. 1A and 1B are cross-sectional views of a conventional decorative board, FIG. 1...Substrate, 2...Base coat, 3...Original drawing member, 4...Cracking layer, 5...Crack,
6...coloring material, 7...protective coat, 8...behind.

Claims (1)

[Scope of Claims] 1. A film on a plain substrate or a substrate on which a painting, pattern, color, etc. is directly applied, or on which an original image member showing a painting, pattern, color, etc. is adhered to the surface using an adhesive. formable synthetic resin emulsion,
Alternatively, a transparent paint is applied and dried to form a base coat, and a starch glue solution is applied to the surface of the base coat and dried to form a cracking layer with moderate cracks on the entire surface, and cracks in the cracking layer are formed. After rubbing the desired coloring material inside, the excess coloring material was wiped off, and then an instant adhesive was applied to the surface of the cracking layer and dried to form a protective coat that fixed the cracked state of the cracking layer. A method for producing a distinctive decorative board. 2. The method for manufacturing a decorative board according to claim 1, characterized in that an instant adhesive is applied and dried to form a protective coat layer, and then a top coat is further formed with a transparent paint or the like.