JP2000070840A - Decoration of inorganic building material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the outer appearance decoration of cubic appearance by applying coloring silica sand spray or spatter coating on an inorganic building material surface with recessed and projected patterns on its surface to carry out a uniform spot coating and then so coating only the surfaces of the projected patterns as to provide a color difference from the recessed section color is of the specified rate or more. SOLUTION: The whole of surfaces of recessed and projected patterns 2b, a 2 on the surface of an inorganic building material 1 is coated uniformly by a substrate coloring coating material 3. In the case patterns are formed by coloring silica sand 4, the coloring silica sand 4 is sprayed and made to adhere before the coating material 3 is dried, while in the case a sprayer or a bell type coater is used for the spatter shape coating, spot-like patterns are formed by respective coating materials when the coating material 3 is dried. Also, the surfaces of projected patterns 2a are so coated with a coating material 5 as to provide a color difference of 3 or more from the spot-like patterns on the recessed sections 2b by using a coating roll when the coating material 3 and the spot-like patterns are dried.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for applying a makeup to an inorganic building material, and more particularly to a method for applying a makeup to an inorganic building material when its surface is spot-painted by spraying colored silica sand or sputter coating.

[0002]

2. Description of the Related Art Inorganic building materials such as fiber reinforced cement boards are widely used as building plates for exterior walls.

[0003] If these inorganic building materials are left as they are, the surface is smooth, the ground color is gray white to gray black, and the design is poor.
Various colors or uneven patterns are applied to the surface. As these makeup methods, a spot pattern is applied by spraying colored silica sand or spatter coating on the surface of the convex part of the inorganic plate with the uneven pattern, expressing a complex color pattern by combining the appearance of natural stone style and the spot pattern There is.

[0004]

However, in the above-mentioned makeup method, when the area of the concave portion of the uneven pattern is smaller than the surface area of the convex portion, such as a brick joint pattern, the surface of the convex portion can be observed from a distance. There is a problem that the color is too conspicuous and the pattern of the concave portion is difficult to recognize, and the entire surface is observed as a mere smooth surface, so that the colored uneven pattern at the corner cannot be used at all.

It is considered that such a problem can be solved by increasing the height difference between the concave portion and the convex portion of the concave-convex pattern so as to enhance the shadow, but it is only necessary to form a deep concave groove. Not only does a thick mold need to be added to increase the cost, but also the thickness of the inorganic plate becomes thicker and bulkier,
There is a problem that it is unsuitable as a building material.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a cosmetic method for an inorganic building material in which, when a spot pattern is formed on an inorganic building material having a concavo-convex pattern, a pattern difference between a concave portion and a convex portion is clearly recognized. It was done as.

[0007]

That is, according to the present invention, there is provided a method for applying a decorative material to an inorganic building material, wherein the surface of the inorganic building material having an uneven pattern is uniformly spot-painted by spraying colored silica sand or sputter coating, and then only the surface of the convex portion is coated. The coating is performed so that the color of the recess and the color difference ΔE are 3 or more.

According to the present invention, of the spot coating on the surface of the inorganic plate showing the concavo-convex pattern, only the surface of the convex portion is painted again to suppress the lightness and color tone of the convex portion, thereby reducing the color difference between the concave portion and the concave portion. Since ΔE3 or more, the color difference between the concave portion and the convex portion becomes clear, and the concave and convex pattern becomes conversely prominent even when observed from a remote distance, so that the concave portion pattern is well recognized.

[0009]

Next, an embodiment of the present invention will be described.
FIG. 1 is an enlarged sectional view of a main part of an inorganic wallboard painted according to the steps of the method of the present invention.

[0010] The inorganic building material applied to the method of the present invention may have any uneven pattern on its surface, for example, a fillet-like uneven pattern that appears on the surface when natural stone is broken, a geometric uneven pattern, or a brick joint-like uneven pattern. A patterned material is used, and as a method for producing the inorganic plate, a plate press or a roll press before curing and curing of a plate material formed by an arbitrary method such as an extrusion method, a papermaking method, a dry method, a casting method, etc. An uneven pattern is formed on the surface by curing, and after curing and hardening, a pattern formed by grinding using a router or the like is used.

Then, in the method of applying a makeup to an inorganic building material of the present invention, first, the entire surface of the uneven pattern 2 is uniformly coated on the surface of the inorganic building material 1 with a paint 3 of a base color. When the pattern is formed with the colored silica sand 4, the colored silica sand 4 is scattered and attached before the paint 3 is dried, and when the paint 3 is dried in a spattered state by spraying or a bell type coating machine, A spot-like pattern is given by each paint (not shown).

When the paint 3 and the speckled pattern 4 are dried, the surface of the convex pattern 2a is removed by a coating roll.
The paint 5 is applied so that the color difference ΔE with respect to the spot pattern in the concave portion 2b becomes 3 or more.

As the coating 5, a coating is used which suppresses the brightness and color tone by colored silica sand or sputter coating and makes the unevenness of coating on the surface of the projections inconspicuous. For example, it is coated with an enamel or a color clear coating.

In the above, the color difference ΔE is a numerical representation of a color difference, and is a scale (L value) representing a change from white to black and a scale (L value) representing a change from red to green. a
Value) and the difference between the target colors (indicated by subscripts 1 and 2) of the scale (b value) representing the change from yellowish to blueish, respectively, to obtain the sum, as shown below. The root value of this sum is defined as a color difference ΔE.

[0015]

(Equation 1)

The larger the value of ΔE, the greater the color difference. Incidentally, when ΔE is 0 to 0.5, the color difference is extremely small, and it is difficult for ordinary people other than specialists to distinguish the difference. When ΔE is 0.5 to 1.5, the color difference is small and the color difference is very small. At ordinary people other than homes, the difference is barely discernable, and between 1.5 and 3.0 the difference is quite noticeable and 3.0.
In the above, the difference is clearly distinguished, and as ΔE increases, the color difference gradually increases, and the difference can be easily distinguished.

Therefore, the case where the color difference ΔE is 3 or more refers to the case where the difference in brightness and color is the minimum limit that anyone can clearly recognize. As described above, according to the method for decorating an inorganic building material of the present invention, when a uniform spot-like pattern is applied to the concave portion and the convex portion, the convex portion is rolled to suppress the color tone of the surface pattern and the coloring for suppressing the brightness. As a result, the color of the concave portion becomes relatively conspicuous, and the makeup with the concave portion emphasized can be obtained. Embodiment Next, an embodiment of the present invention will be described. Example 1 An enamel paint was applied to the entire surface of an inorganic wall plate in which brick joints having a width of 10 mm and a depth of 4 mm were formed on the surface of a fiber-reinforced cement board at intervals of 15 cm × 7 cm and a depth of 4 mm and a depth of 4 mm. Before the paint was dried and hardened, colored silica sand was sprayed and adhered, and then dried and hardened in this state to fix the colored silica sand.

Further, a transparent clear paint was applied to the entire surface so that the color of the colored silica sand and the color of the base paint could be observed from the surface, and at the same time, a protective layer of the colored silica sand was formed. After drying and curing the clear coating, apply a color clear coating only to the convex surface by a roll coater,
By this coating, the brightness and color of the surface of the convex portion were suppressed so that the color difference ΔE between the surface of the convex portion and the inner surface of the concave portion became 3 or more.

Example 2 An undercoat was applied to the entire surface of the same inorganic wallboard as in Example 1 with an enamel paint, and the enamel paint was dried and cured, followed by a sputter-like coating using a bell type spray coater.

After drying the sputter coating, a transparent clear coating was applied to the entire surface so that the colors of the sputter coating and the base coating could be observed from the surface, and at the same time, a protective layer of the sputter coating was formed.

After the clear coating is dried, a color clear paint is applied only to the surface of the convex portion by a roll coater, and the color difference ΔE between the surface of the convex portion and the inner surface of the concave portion is adjusted to 3 or more by this coating. Brightness and color were suppressed.

Example 3 Colored makeup was carried out in the same manner as in Example 2 except that sputter coating was performed using a sprayer instead of the bell type spray coater of Example 2.

Comparative Example 1 An inorganic plate material was obtained by omitting the step of applying a color clear paint only to the surface of the convex portion using a roll coater, which is the final step in the coloring cosmetic process of Example 1.

Comparative Example 2 An inorganic plate material was obtained by omitting the step of applying a color clear paint only to the surface of the convex portion using a roll coater, which is the final step in the coloring cosmetic process of Example 2.

Visual sensory tests of Examples 1 to 3 and Comparative Examples 1 and 2 were carried out.
In all three, when observed from a position 20 m away under the sunshine condition, vertical and horizontal joints were clearly observed.

On the other hand, in each of Comparative Examples 1 and 2, the joints were hidden by the color of the surface of the projections under the same conditions, and the joints could not be clearly observed unless they approached a distance of about 5 m on average. Was.

In particular, the above tendency was stronger in lighter colors with lighter brightness.

[0028]

As described above, according to the method for decorating an inorganic building material of the present invention, the spot pattern in the concave portion among the concave and convex patterns is made more conspicuous than the surface of the convex portion. It is possible to make the appearance makeup with outstanding and three-dimensional appearance.

Further, the uneven surface of the colored silica sand and the spatter can be made inconspicuous with the color clear paint or the like on the surface of the convex portion, so that the appearance of the entire inorganic wall plate can be improved.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part of an inorganic plate material coated by a method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inorganic building material 2 Concavo-convex pattern 2a Convex part 2b Concave part 3 Base paint 4 Colored sand grain 5 Painting of convex part surface

Claims (1)

[Claims] 1. An inorganic building material having an uneven pattern on its surface is uniformly spot-painted by spraying colored silica sand or sputter coating, and then only the convex surface is coated so that the color of the concave portion and the color difference ΔE are 3 or more. Characteristic method of making inorganic building materials.