JPH0427197B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] This invention relates to an inorganic board such as asbestos slate.

[Background technology]

In order to improve the appearance of inorganic boards such as asbestos slate, which are mainly used for the interior and exterior of buildings,
Recently, the surface has been painted with a glossy finish, or joint-like grooves have been added to simulate the appearance of tiling or brickwork.

However, since conventional coatings are simply smooth, glossy surfaces, they lack depth and texture, and depending on the viewing direction, there are problems such as no glossiness at all.

Moreover, a smooth, glossy surface has the disadvantage that surrounding objects appear as sharp images, and the cosmetic effects of the surface itself, such as colors and patterns, are diminished.

[Purpose of the invention]

This invention was made in view of the above circumstances, and has depth, texture, and a sense of luxury, has a glossy appearance when viewed from any direction, and is easy to see surrounding objects as an image. It aims to provide no inorganic board.

[Disclosure of the invention]

In order to achieve the above object, the present invention provides an inorganic board on which a glossy coating film is formed, the coating film surface having fine and gentle coatings with a maximum depth of 5 to 300 μm at intervals of 5 to 30 mm. The gist of this product is an inorganic board that is characterized by a large number of undulating microscopic irregularities.

The present invention will be explained in detail below with reference to FIG. 1 and the second side showing one embodiment thereof. Note that in these figures, the unevenness is emphasized, but the actual unevenness is quite small.

As shown in these figures, the inorganic board A of this example has joint-like grooves 2 formed on the surface of the base 1, and is used to simulate the appearance of tiling. In this embodiment, the edges of the joint-like grooves 2 are tapered.
A glossy coating film 3 is formed on the surface including such joint-like grooves 2 .

As the base body 1, a normal base body is used. For example, asbestos slate, asbestos cement calcium silicate board, wood chip cement board, asbestos cement perlite board, pulp cement board, cement extrusion, etc. can be used.

As the coating film 3 applied and formed on the surface of the substrate 1, a coating film made of an ordinary organic or inorganic paint is used. As the organic paint, the usual ones used for this purpose are used, but among them, the ones shown below are preferable.
Can be mentioned.

Vinyl resin paint, acrylic resin paint, acrylic urethane resin paint, fluororesin paint, acrylic silicone resin paint, polyester resin paint, polyurethane resin paint, metal alkoxide paint, etc.

Examples of inorganic paints include (a) those that harden by crosslinking such as silicates, phosphates, silica sol, alumina sol, etc., (b) those that harden by cooling a melt such as solder glass, ( c) Those that harden due to the disappearance of organic side chains such as alkyl silicates and alkyl titanates.

The coating film 3 may be a single layer, or may have a multilayer structure including, for example, a primer layer, a colored layer, a top coat layer, etc. At that time, either inorganic or organic paint may be laminated. of course,
A combination of both is also possible.

The present invention is characterized in that the surface of the coating film 3 as described above is an uneven surface having minute irregularities that are fine and gently undulating. The uneven surface may be formed only in the plateau-like portion 4 surrounded by the joint-like grooves 2, or may be formed up to the bottom of the joint-like grooves 2, as in the embodiment shown in the figure. It's okay.

The fine and gently undulating minute irregularities have a period of irregularities (S in Fig. 2) at intervals of 5 to 30 mm and a depth (second interval).
In the figure, D) is formed with a thickness of 5 to 300 μm.

When such an uneven surface is formed on the surface of the coating film 3, the light incident on this surface is diffusely reflected by the uneven surface, as shown in FIG.

For this reason, the reflected light changes variously depending on the viewing direction, making it possible to obtain depth and texture that cannot be obtained with conventional smooth glossy surfaces, such as the texture of glazed tiles. It is also possible to enhance the glossiness. Visual depth and texture also lead to the apparent amount of paint being applied. At the same time, surrounding objects are prevented from appearing as sharp images.

In addition, in the case where joint-like grooves 2 are formed on the surface, the edges of the joint-like grooves 2 are tapered as in this embodiment, and at least the coating film on the tapered portion is also made into an uneven shape. This also has the effect of making the joint-like groove appear deeper than it actually is.

In order to make the surface of the coating film 3 an uneven surface having fine and gentle unevenness as described above, the surface of the base 1 itself should have such an uneven surface, or the inside of the coating film 3 should have such an uneven surface. What is necessary is to generate unevenness.

In order to make the surface of the base 1 itself uneven, for example, at the stage before and after the pressing process in the manufacturing process of the asbestos slate that is the base 1 illustrated in FIG.
What is necessary is to provide the base body 1 with an uneven shape. Examples of methods for imparting an uneven shape to the surface of the base 1 include the following methods.

An embossing is provided in a mold used in the pressing process, and the uneven shape of the embossing is transferred onto the surface of the base 1 at the same time as pressing.

After the pressing process, when the base body 1 is released from the press pressure, variations in the restoring force inside the base body 1 are used to generate irregularities.

Among the above methods, by using the same mold, it is possible to always reproduce a constant unevenness. On the other hand,
This method utilizes the differences in the restoring force of the constituent materials such as cement and asbestos contained in the base 1, and although the same uneven shape cannot be reproduced twice, it is possible to form natural unevenness. Therefore, these methods may be used depending on the purpose.

On the other hand, in order to generate unevenness inside the coating film, for example, solid components that become the source of the protrusions are dispersed.
A method using a so-called patterned paint, a method using a multilayer coating film including an intermediate coating layer, a primer layer, etc. that forms a pattern by a coating method, etc. are used.

Although the inorganic board of the present invention has been described so far only based on the above-mentioned embodiments, the present invention is not limited to the above-mentioned embodiments.

For example, in the above examples, the coating film formed on the surface of the substrate was a single layer, but as described above, the coating film may have a multilayer structure.

In the illustrated embodiment, the irregularities on the surface of the coating film are formed by the irregularities of the substrate itself, but they may also be generated within the coating film.

The inorganic board of this example had joint-like grooves formed on the surface of the base to simulate the appearance of tiling, but the joint-like grooves may not be provided.

In short, the surface of the coating film formed on the surface is 5
Other configurations are not particularly limited as long as the surface is a concavo-convex surface having a large number of fine, gently undulating minute concavities and convexities with a maximum depth of 5 to 300 μm at intervals of ~30 mm.

〔Effect of the invention〕

The inorganic board of this invention is as described above,
An inorganic board having a glossy coating formed on its surface, where the coating surface has a large number of fine, gently undulating minute irregularities with a maximum depth of 5 to 300 μm at intervals of 5 to 30 mm. Because it is a surface, it has depth, texture, and a sense of luxury, and it has a glossy appearance when viewed from any direction, and what is more, it does not capture the surrounding objects as an image.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the appearance of an embodiment of the inorganic board of the present invention, Fig. 2 is a partial sectional view of this embodiment, and Fig. 3 is an example of the manufacturing process of the substrate used in this embodiment. It is a process diagram. A... Inorganic board, 1... Substrate, 3... Paint film.

Claims (1)

[Scope of Claims] 1. An inorganic board on which a glossy coating film is formed, and the coating film surface has fine, gently undulating microscopic structures with a maximum depth of 5 to 300 μm at intervals of 5 to 30 mm. An inorganic board characterized by a large number of uneven surfaces. 2. A patent in which joint-like grooves are provided on the surface, and minute irregularities are formed on the surface of the paint film including the joint-like grooves, at least in a plateau-like portion surrounded by the joint-like grooves. An inorganic board according to claim 1. 3. The inorganic board according to claim 2, wherein the edges of the joint-like grooves are tapered.