JPH0372983A - Manufacture of plate for construction - Google Patents

Abstract

PURPOSE:To manufacture a coated plate with natural superficial pattern of stone for construction on a natural uniform stone surface, particularly granite pattern is indicated by carrying out base coating of a coating material with opacifying properties, and then forming design coating with design pattern on the base coating and forming the top coating of a clear coating material over the pattern coating. CONSTITUTION:Base coating 2 of an opacifying coating material is applied on a base 1, and then a pattern coat 3 of design pattern is formed on the base 2, and a first top coat 4 over the color clear coating material is formed on the pattern coat 3. Then a second top coat 5 of colorless clear coating material is formed over the first top coat 4, and the surface of the second top coat 5 is ground and a mirror-surface is processed to manufacture a desired plate for construction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a method for manufacturing architectural boards that express the appearance of natural stone, and more specifically to a method for forming a surface pattern of natural stone, particularly granite pattern.

[Prior Art] In recent years, natural stone has been used as a building material due to its luxurious appearance.

However, when natural stone is used as a building material, it has disadvantages such as being expensive, heavy, easily broken, and difficult to construct. For this reason, the most widely used method for obtaining architectural boards with natural stone patterns is to print on the surface of the base material, but it has the following drawbacks.

■ Plate making and printing require time and expense.

■There are no variations in the pattern seen with natural stone, and only a uniform pattern can be expressed (only the same pattern is printed).

■If you want to vary the pattern, you will need many plates.

■Large sizes are not possible because only plate-sized pieces can be produced.

■Items with unevenness (embossed) on the base material cannot be used.

In order to solve this problem, the applicant for this patent previously filed Japanese Patent Application Nos. 63-177305 and 1983-177306.
No., Utility Application No. 1-20505, Japanese Patent Application No. 1-51525, Japanese Patent Application No. 1-51526, etc. In such a board, a base coat is applied to the surface of the substrate, a pattern coat is applied on the base coat, and a top coat such as a color clear paint is applied on the pattern coat to form a construction board.

[Objective to be Solved by the Invention [I] The above method can solve the disadvantages of printing, but there are the following problems. In other words, to express the texture of natural stone or artificial stone, the surface is polished to obtain a mirror surface. In addition, color clear paint is used for the Y-tub coat to create depth, but when finishing the top coat of color clear paint to a mirror finish, the amount of cover (amount of top coat of color clear paint)
Even if the amount of polishing is constant, there will be variations in the amount of polishing during polishing.
The disadvantage is that the thickness of the top coat of the color clear paint changes, resulting in color differences in surface appearance.

The present invention has been made in view of the above points, and the purpose of the present invention is to polish the surface using a color clear paint as a top coat in order to express natural stone or artificial stone. A construction board that can prevent surface color differences due to variations in the thickness of the clear paint top coat! ! ! We will provide you with a way to send the money.

Means for Solving 1BM 1 In order to achieve the above object, the method for manufacturing a construction board of the present invention is as follows:
A base coat 2 of a concealing paint is applied on the substrate 1,
Next, a pattern coat 3 with a pattern is formed on the base coat 2, a first top coat 4 of a colored clear paint is formed on the pattern foot 3, and a second top coat of a colorless clear paint is applied to the top of the first top foot 4. 5, and the surface of the second top coat 5 is polished to a mirror finish.

[Function] A second top coat 5 of a colorless clear paint is formed on the first top coat 4 of a color clear paint, and the surface of the second hard coat 5 is polished to reduce the thickness of the first top coat 4 of a color clear paint. The surface can be mirror-finished without changing the color, and color differences due to variations in the thickness of the color clear paint layer can be prevented.

[Example J The substrate 1 has a smooth surface, and the materials used include a calcium silicate board, an asbestos cement board, a gypsum puffer board, a gypsum board, an FRP board, a plywood board, and a wood board. On the surface of this substrate 1, a base coat 2 is formed using a concealing paint to form a coating film of the same color as the natural stone expressed. As a coating method for applying the base coat 2, roll coater 170-footer, spray coating, etc. may be used alone or in combination. The material for the base coat 2 is, for example, urethane enamel paint. Next, a pattern coat 3 is formed by applying a concealing paint onto the base coat 2 so as to form a pattern. A urethane-based enamel paint can be used as a paint for forming the handle 13. After applying the pattern coat 3 on the base coat 2 in this way, a color clear paint is applied on the pattern coat 3 to form a first top coat 4 in order to bring out the depth of natural stone. A colorless clear paint is applied to form a second top coat 5.

In other words, pattern coat 3 alone cannot express the deep transparency of natural stone, and pattern coat 3 is coated with color clear paint 1.
By applying the top coat 4 and the second top coat 5, which is a colorless clear paint, it has the effect of expressing a sense of depth.

The clear paint used to apply the first top coat 4 and the second) top coat 5 is, for example, a urethane-based clear paint. By the way, when first top coat 4 or #IJ2) bulge coat 5 is applied, foreign matter may adhere to the surface or air bubbles may be mixed in at the time of painting, making it impossible to obtain a good appearance with just painting (and pattern coat 3). 12) There is a problem that minute irregularities are formed on the surface of the top coat 5, making it impossible to obtain a smooth surface obtained by polishing natural stone.9 To solve this problem, the surface of the W42 top coat 5 is polished and the second top foot is polished. By making the surface of 5 smooth, the sense of depth can be improved. In order to effectively produce the fA effect, it is more effective to increase the thickness of the first top coat 4 and the second top coat 5, and it is also possible to apply clear paint multiple times, and polishing the surface is better with colorless paint. Since the second top coat 15 is a clear paint, the thickness of the first top coat 4, which is a color clear paint, does not change and color difference on the surface can be prevented.

[Effects of the Invention] As described above, the present invention applies a base coat of a concealing paint to a substrate, then forms a pattern coat on the base coat, and forms a top coat of a clear paint on the pattern coat. Because of this, it is possible to obtain architectural boards that express natural stone, especially granite patterns, which are not uniform, which cannot be expressed using the printing method (moderate variations occur due to the pattern coating, and each pattern is slightly different). Of course, the surface of the clear paint top coat is polished to a mirror finish, which improves the surface smoothness and brings it closer to the polished appearance of natural stone, improving the appearance. Since the color clear paint forms the first top coat of the color clear paint, the color clear paint further increases the sense of depth due to the change in color. A second top coat of colorless clear paint is formed on top of the coat, and the surface of the second top coat is polished to a mirror finish, so that the first coat of color clear paint can be coated without polishing the PISL coat of color clear paint. It is possible to make the thickness of TOPKO uniform and prevent color differences, making it possible to more closely approximate the appearance of natural stone or artificial stone.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of a construction board obtained by the method of manufacturing a construction board of the present invention, in which 1 is a substrate, 2 is a base coat, 3 is a pattern coat, 4 is a first top coat, and 5 is the second top coat.

Claims (1)

[Claims] [1] Apply a base coat of concealing paint on the substrate, then form a patterned pattern coat on the base coat,
Forming a first top coat of a color clear paint on the pattern coat, forming a second top coat of a colorless clear paint on the first top coat, and polishing the surface of the second top coat to give a mirror finish. A method for manufacturing a construction board characterized by: