JPH06321666A - Decorating method of rough surface of ceramic plate - Google Patents

Abstract

PURPOSE:To provide a decorating method of a rugged surface of a ceramic plate so that the water resistance of the surface is made more complete and the surface shows natural appearance and controlling of a coating liquid in the coating process is made easy. CONSTITUTION:A permeable water-absorption preventing agent 2 is applied and permeated on the recessed surface of a ceramic plate 1 having a rugged pattern, and then a weather-resistant clear coating material 3 is applied only on the projected surface 1A. This clear coating liquid 3 is a fluororesin-based, acryl urethane-based or alkoxide material-based and added with a pigment having same color as that of the ceramic plate material in a dry state by 0.5-5%, or no addition of the pigment. Then the whole surface of the ceramic plate is coated with the clear coating liquid without addition of pigment 3A. By this method, the base color can be developed with the clear coating liquid, while the recessed part and projected part shows difference of color density, thereby, deterioration of the coating film due to UV rays is hardly recognized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for making uneven surface of a ceramic plate material.

[0002]

2. Description of the Related Art Heretofore, ceramic plate materials made of fiber reinforced cement have been very widely used as exterior wall boards. The seed wall plate having the same shape can be mass-produced at low cost, and consumes almost no natural resources such as wood, so that it is advantageous from the viewpoint of nature protection. By the way, since these ceramic board materials have surface water absorbency, if they are left as they are, the waterproofing effect is not sufficient, so in the conventional case, the surface makeup is performed with waterproof paints of various colors for the purpose of suppressing surface water absorbency and at the same time imparting designability. Was being done. Further, in order to further impart the design property of the surface of the ceramic plate material, for example, it is also performed to form a brick-like or tile-like uneven joint pattern on the surface and paint the joint and the convex surface separately. There is.

[0003]

[Problems of the prior art] However, the appearance of the exterior wall plate gradually deteriorates due to fading deterioration due to the influence of ultraviolet rays and dirt due to the adhesion of floating dust, and the design of the outer wall as a whole deteriorates early. There was such a problem.
Then, when such deterioration occurs, the waterproof function is gradually impaired, and there is a problem that the deterioration due to freezing and thawing is further promoted in a region where the backside of the wallboard has permeated with water and mold develops.

Further, in the case of a plate material having a brickwork-like or tiled-like uneven joint pattern formed on its surface, it is necessary to separately paint the convex surface and the joint portion, and in the coating process, paint or the like is used to avoid color mixing. There was a problem that management became complicated.
Furthermore, in recent years, the texture of natural materials such as natural stone has tended to be preferred as the appearance of the outer wall from the artificial coloring, and it is difficult to produce such an appearance with the above-mentioned colored coating. there were.

[0005]

SUMMARY OF THE INVENTION In view of the above problems, the present invention can make the surface water-resistant more complete and give a natural appearance, and can easily control the paint in the painting process. The present invention has been made for the purpose of providing a method for making uneven surface of a ceramic plate material which can be

[0006]

Means for Solving the Problems That is, the method for making uneven surface of a ceramic plate material of the present invention is to apply a penetrating water-absorption inhibitor only to the convex surface of the ceramic plate material having an uneven pattern on the surface. After the impregnation, a fluorine-based resin, acrylic urethane or alkoxide-based weather-resistant clear coating containing 0.5 to 5% of a pigment that matches the color of the ceramic-based plate material when dried is applied only to the convex surface after coating. Applying the weather-resistant clear coating containing no pigment and then applying the clear coating containing the above-mentioned pigment on the entire surface of the ceramic plate material again, and omitting the application of the clear coating containing the above-mentioned pigment, and preventing the permeation of water absorption only on the convex surface It is characterized in that the agent is applied and impregnated, and after the coating, the weather-resistant clear coating material containing no pigment is applied to the entire surface of the ceramic plate material.

[0007]

[Function] The method for making uneven surface of the ceramic plate according to the present invention is
The texture of the ceramic base material itself, that is, in the case of a fiber reinforced cement board, the color peculiar to cement hydrate, the state of efflorescence due to the precipitation of calcium, and the appearance of the mixed aggregate as it is. It was made to appear.

The surface of the convex portion of the ceramic plate material is first coated and impregnated with a penetrating water absorption inhibitor to suppress surface water absorption. A silane-based impregnating agent or an acrylic resin-based or polyurethane resin-based sealer is used as the penetrating water absorption inhibitor. Since these penetrating water-absorption inhibitors are impregnated on the surface of the convex portion of the surface of the ceramic plate material, the ceramic plate material loses its surface water absorbency only at the convex portion at the time of applying the sealer.

After the sealer coating, 0.5 to 5% of a pigment that matches the color of the ceramic plate material at the time of drying is added only to the surface of the convex-concave pattern of the fluorine-containing resin, acrylic urethane or alkoxide type weather resistance. By applying clear clear coating, the surface of the convex portion and the joint portion are color-coded. The reason why the amount of the above pigment is 0.5 to 5% is that if it is less than 0.5%, clear color coding cannot be performed, and if it is more than 5%, it becomes conspicuous when the pigment is deteriorated by ultraviolet rays or the like.

Finally, the entire surface of the plate material is made water resistant by re-applying the weather-resistant clear paint containing no pigment on the entire surface of the ceramic plate material. Since no clear pigment for coloring is used in this clear, there is no problem of fading due to ultraviolet rays.
In the present invention, it is possible to omit the clear coating containing the pigment. In this case, since the penetrating water-absorption preventing agent is not applied to the concave portion, water permeates to form a so-called “wet color”, which is a natural two-tone color.

[0011]

Embodiments of the present invention will be described below.

Example 1 A fiber-reinforced cement board 1 having a thickness of 1.5 cm, a length of 45 cm and a width of 45 cm, and a brick-like joint groove having a depth of 4 mm at intervals of 5 × 8 cm on the surface was press-molded, and after curing and curing, A silane-based impregnating agent (trade name: Knit Seal manufactured by Dainippon Paint Co., Ltd.) as a penetrating water absorption inhibitor 2 was applied to only the surface of the convex portion by a roll coater at 200 g / m ² and dried.

Next, 110 g / m ² of a fluorine resin coating (trade name: V Clon Clear manufactured by Dainippon Paint Co., Ltd.) was used as a clear coating 3 in which 2% of a light gray pigment was added only to the convex surface 1A of the plate material surface. It was applied with a roll coater and dried. Next, after drying the coating film on the surface 1A of the convex portion, the clear paint 3A containing no pigment was applied to the entire surface of the plate material 1.

Example 2 The application of the clear paint 3 containing the pigment used in Example 1 was omitted, and the clear paint containing no pigment was immediately applied to the entire surface of the plate 1 immediately after applying the water absorption inhibitor 2 on the surface of the convex portion. Was applied to.

Example 3 A polyurethane resin type impregnating agent was used in place of the silane type impregnating agent of the penetrating water absorption inhibitor 2 used in Example 1, and an inorganic type coating was used as the clear coatings 3 and 3A. A surface makeup was applied in the same manner as in Example 1.

[Comparative Example] On the surface of the fiber-reinforced cement plate 1 of the same size used in Example 1, a silane-based impregnating agent was applied at 200 g / m ² as in Example 1 and dried, and then on the surface. Ivory pigmented enamel paint is applied to the entire surface at 130 g / m ² , then gray pigmented enamel paint is applied only on the convex surface 1 A with a roll coater to 30 g / m ² for surface makeup. It was

When the test plate of Example 1 was observed, as shown in FIG. 1, the permeable water-absorption inhibitor 2 penetrated into the convex surface of the substrate 1 and a coating film of clear coating 3 was formed on the convex surface. Furthermore, clear paint 3A that does not contain pigment on the entire surface
It was observed to be painted on.

The appearance of the joint is clear paint 3
It was a natural stone-like appearance in which the wet color of dark color by A and the surface of the convex portion became a light gray dry ground color and were separately painted clearly. On the other hand, in the comparative example, the background color was not observed at all due to the ivory and gray coloring.

Next, a UV weather resistance test was conducted on the examples 1 to 3 and the comparative example with a sunshine weather meter. The examples 1 to 3 showed no change in appearance after 3000 hours, but the comparative example After 1,000 hours, fading was observed, and the chalking phenomenon occurred on the entire surface of the coating film, fading to the extent that the original color could not be seen.

[0020]

As described above, the method for making uneven surface of ceramic board according to the present invention directly expresses the natural appearance of the ceramic board itself, and moreover, the surface of the convex part of the board is permeable to water absorption. Since the clear coatings 3 and 3A having good weather resistance are applied after being impregnated with the inhibitor 2, there is almost no change in appearance due to deterioration of the pigment due to ultraviolet rays, and even if it occurs, the change in color is achromatic. Since it stays within the range, it is hardly noticeable and retains the appearance of natural stone for a long time. Furthermore, in the method for making uneven surface of ceramic plate according to the present invention, the use of pigment is clear coating 3 applied to the surface of the convex portion.
Therefore, there is little danger of color mixing, and even if it occurs, there is little difference from the background color, so that it has various effects that it is less noticeable and that makeup with good quality can be easily implemented.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of an essential part of an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ceramic-based plate material 1A ... Convex surface 2 ... Permeable water-absorption inhibitor 3 ... Clear paint with pigment 3A ... Clear paint without pigment

Claims (2)

[Claims] 1. A permeable water-absorption inhibitor is applied and impregnated only on the convex surface of a ceramic plate material having an uneven surface, and the ceramic plate material is dried only on the convex surface after coating. 0.5 to 5% of a pigment that matches the color of Fluorocarbon resin-based, acrylic urethane-based or alkoxide-based weather-resistant clear coating is applied, and then the above-mentioned weather-resistance that does not include pigment on the entire surface of the ceramic plate A method for applying a rough surface to a ceramic plate material, which comprises applying a clear paint having a certain amount of color. 2. The weather resistance not containing a pigment on the entire surface of the ceramic board after coating, by impregnating the surface of the ceramic board having an uneven surface with a penetrating water-absorption inhibitor. A method for applying a rough surface to a ceramic plate material, which comprises applying a clear coating having properties.