JPH1149589A - Decorative plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to prevent the dissipation of design layers which are formed to distribute unevenly on the surface of an inorg. plate by using a coating material contg. a specific ratio of inorg. pigments and forming a protective layer on these design layers. SOLUTION: This decorative plate is obtd. by forming a waterproof sealer layer 4 on the front surface of the inorg. plate 1, forming a ground surface layer 5 on its front surface, partially forming the design layers 2 thereon so as to distribute unevenly by using the coating material contg. 60 to 90 wt.% inorg. pigments and coating the surfaces of the design layers 2 and the ground surface layer 5 with the protective layer 3. The inorg. plate 1 is obtd. by molding a cement compsn. formed by dispersing solid contents contg. cement, silica component, reinforcing fibers, etc., into water, to a planar form and curing and hardening the molding. The design layers 2 are the layers of 3 to 10 μm in thickness formed by applying the coating material, which is prepd. by compounding the inorg. pigments selected from titanium oxide, iron oxide, cobalt oxide, etc., with a base coating material, such as acrylic emulsion coating material, etc., on the ground surface layer and drying the coating. The protective layer 5 is a clear coating material and is a resin coating material layer of 5 to 20 μm in thickness which assures the adhesion property to the ground surface layer 5 and the design layers 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative board used for a building material used outdoors such as an exterior material, and more particularly to a surface coating of a decorative board.

[0002]

2. Description of the Related Art A decorative plate has been proposed in which a pattern layer is formed over the entire surface of a ceramic-based inorganic plate such as a cement plate or the like to apply a makeup. This pattern layer is formed of a thin coating film of about several μm, and is formed by applying a paint prepared by blending an inorganic pigment and curing a resin component in the paint. In addition, in such a decorative board, the surface of the picture layer is clear (transparent) with a coating film.
A protective layer is formed, and the protective layer prevents the picture layer from being damaged or damaged.

[0003]

However, in the decorative plate of the above-mentioned conventional example, since the picture layer is formed with a paint containing less than 60% by weight of an inorganic pigment, it is irradiated with sunlight (ultraviolet rays). As a result, there is a problem in that the picture layer is deteriorated such as whitening due to the deterioration of the inorganic pigment or the resin component, and the picture layer is lost. Therefore, the compounding amount of the inorganic pigment is 6
It is conceivable to reduce the deterioration of the picture layer by forming the picture layer using a paint of 0 weight or more. In this case, the paint layer and the inorganic plate or There was a problem that the adhesion between the picture layer and the protective layer was low and the pattern layer was peeled off.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and a decorative plate capable of preventing the disappearance of the picture layer and preventing the peeling of the picture layer and the protective layer and improving the weather resistance. It is intended to provide.

[0005]

The decorative plate according to the first aspect of the present invention is a decorative plate having a pattern layer 2 formed on the surface of an inorganic plate 1 and a protective layer 3 formed on the surface of the pattern layer 2. Further, the pattern layer 2 is formed so as to be unevenly distributed on the surface of the inorganic plate 1 using a paint containing 60 to 90% by weight of the whole inorganic pigment.

[0006]

Embodiments of the present invention will be described below. As shown in FIG. 1, the decorative plate of the present invention has an inorganic plate 1
A waterproof sealer layer 4 is formed on the surface of the waterproof sealer layer 4 and a base layer 5 is formed on the surface of the waterproof sealer layer 4. The pattern layer 2 is partially formed on the surface of the base layer 5 while being unevenly distributed. The protective layer 3 is provided so as to cover the surface of the formation 5.

The inorganic plate 1 is an arbitrary one which has been conventionally used as an exterior material such as an outer wall, and a cement composition is prepared by dispersing a solid containing cement, a silica component and reinforcing fibers in water. Then, the cement composition is formed into a plate shape by an arbitrary forming method such as a papermaking method or a press method, cured by curing such as autoclave curing, and then dried.

The waterproof sealer layer 4 is provided for ensuring the waterproofness of the inorganic plate 1 and for flattening the surface of the inorganic plate 1. For example, an acrylic emulsion paint can be used. The base layer 5 is for hiding the inorganic plate 1 and the waterproof sealer layer 4, for securing the adhesion (adhesion) between the picture layer 2 and the waterproof sealer layer 4, and for protecting the protective layer 3.
It is provided to ensure the adhesion (adhesion) of the waterproof sealer layer 4 and the like, and for example, an acrylic emulsion paint, an acrylic silicone resin paint, a fluororesin paint, an inorganic paint, or the like can be used. Those obtained by coloring these paints with a pigment or the like can be used.

For the picture layer 2, a paint prepared by blending an inorganic pigment with a base paint such as an acrylic emulsion paint, an acrylic silicone resin paint, a fluororesin paint, or an inorganic paint can be used. It is preferable to use a paint obtained by blending an inorganic pigment with a fluorine resin paint, an inorganic paint, or the like having a high content. As the inorganic pigment, titanium oxide, cobalt oxide, iron oxide, or the like can be used.

The paint for forming the picture layer 2 contains 60 to 90% by weight of an inorganic pigment based on the whole. If the content of the inorganic pigment (PWC: pigment content) is less than 60% by weight, the amount of the resin component in the paint for forming the picture layer 2 becomes too large, and this resin component is irradiated by the sunlight for a long time. The pattern layer 2 may be lost due to deterioration and whitening, and the pattern layer 2 and a protective layer 3 described later may be separated due to deterioration of the resin component. If the content of the inorganic pigment exceeds 90% by weight, the resin component in the paint for forming the picture layer 2 becomes too small, and the adhesion between the picture layer 2 and the protective layer 3 is reduced. There is a possibility that the protective layer 3 may peel off.

The content of the inorganic pigment is 60 to 90% by weight.
By doing so, it is possible to prevent the pattern layer 2 from bleeding when the paint for forming the protective layer 3 is applied,
A sharp picture layer 2 can be formed. Further, by setting the content of the inorganic pigment to 60 to 90% by weight, the penetration of the paint of the protective layer 3 into the pattern layer 2 is increased, and
And the protective layer 3 can be firmly integrated, and the adhesion between the picture layer 2 and the protective layer 3 can be increased. In order to prevent the deterioration of the picture layer and the peeling of the picture layer and the protective layer over a long period, the content of the inorganic pigment in the paint is preferably 75 to 90% by weight.

The protective layer 3 is preferably made of a clear (transparent) paint, and is preferably made of the same paint as the underlayer 5 and the picture layer 2 in order to secure the adhesion to the underlayer 5 and the picture layer 2. For example, an acrylic emulsion paint, an acrylic silicone resin paint, a fluororesin paint, an inorganic paint, or the like can be used. When forming a decorative board using the above-mentioned materials, first, a coating material for forming the waterproof sealer layer 4 is applied to the entire surface of the inorganic board 1 using a roll coater or a spray, and then dried. The waterproof sealer layer 4 is formed. Next, a coating material for forming the base layer 5 is applied to the entire surface of the waterproof sealer layer 4 using a roll coater, a spray, or the like, and dried to form the base layer 5. The film thickness of this paint can be set to 5 to 20 μm in order to cover the inorganic plate 1 and the waterproof sealer layer 4. The drying condition is a temperature of 50 to 80.
° C and the time can be set to 5 to 10 minutes.

Next, a paint for forming the picture layer 2 is partially applied to the surface of the underlayer 5 using a roll coater or a spray so as to form a picture so as to form a picture, and then dried. The picture layer 2 is formed. The thickness of the paint varies with the pattern to be formed, but can be set to 3 to 10 μm. The drying condition is a temperature of 50 to 80.
° C and the time can be set to 5 to 10 minutes. next,
A paint for forming the protective layer 3 is applied to the entire surface of the base layer 5 (the portion where the pattern layer 2 is not formed) and the entire surface of the pattern layer 2 using a roll coater or a spray so as to form a pattern. By drying this, the protective layer 3
To form The thickness of this paint can be set to 5 to 20 μm to protect the picture layer 2. The drying conditions can be set at a temperature of 50 to 80 ° C. and a time of 5 to 15 minutes. Thus, the decorative board of the present invention can be formed.

In the decorative plate of the present invention, as described above, the pattern layer 2 is unevenly distributed on the underlayer 5 on the surface of the inorganic plate 1 using a paint containing an inorganic pigment in an amount of 60 to 90% by weight. Thus, the pattern layer 2 is formed with a paint having an inorganic pigment content of 60 to 90% by weight.
Of the picture layer 2 can be prevented. In addition, since the pattern layer 2 is unevenly formed and partially formed on the surface of the underlayer 5, the protective layer 3 containing no pigment and having a high resin component and the pigment are not contained or the pigment content is reduced. The base layer 5 having a small amount of resin component can be directly adhered to the base layer 5, and the separation of the protective layer 3 from the base layer 5 on the surface of the inorganic plate 1 can be prevented. By preventing peeling, the pattern layer 2 covered with the protective layer 3 can be prevented from peeling from the underlayer 5, and the pattern layer 2 is coated with a paint having an inorganic pigment content of 60% by weight or more. Is formed, the occurrence of peeling of the pattern layer 2 and the base layer 5 can be reduced.

[0015]

The present invention will be described below in detail with reference to examples. (Examples 1 to 5 and Comparative Examples 1 to 3) The waterproof sealer layer 4 was formed by applying an acrylic emulsion paint to the entire surface of the inorganic plate 1 composed of cement, fly ash, silica powder and pulp fiber and drying it. Formed. Next, the coatings shown in Tables 1 and 2 were applied to the entire surface of the waterproof sealer layer 4 with a flow coater to a thickness of 15 μm,
The underlayer 5 was formed by drying under the condition of 5 minutes. Next, the paints shown in Tables 1 and 2 were applied to the surface of the base layer 5 by spraying to a thickness of 5 μm and dried at 60 ° C. for 7 minutes to form the picture layer 2. Next, the coating material shown in Tables 1 and 2 was applied to the entire surface of the underlayer 5 and the surface of the picture layer 2 by a flow coater to a film thickness of 10 μm.
The protective layer 3 was formed by drying at 5 ° C. for 5 minutes. Thus, a decorative plate was formed.

The acrylic paints in Tables 1 and 2 include:
The thing made from Dai Nippon Paint was used. As the acrylic silicone paint, a paint manufactured by Dainippon Ink and Chemicals was used.
Further, as the inorganic paint, one made by Matsushita Electric Works, Ltd. was used. As the fluorine paint, a paint made by Dainippon Paint was used. The decorative plates of Examples 1 to 5 and Comparative Examples 1 to 3 were irradiated with ultraviolet light for 800 hours, and the color change (color difference ΔE) of the picture layer 2 was measured. Further, the presence or absence of peeling of the protective layer 3 was observed. The symbol ◎ indicates that the pattern layer 2 had a color change of 2.5 or less and the protective layer 3 did not peel off, and the symbol ◎ indicates that the pattern layer 2 had a color change of 3.5 or less and did not peel the protective layer 3. ○
When the color change of the picture layer 2 exceeds 3.5 or the protection layer 3
Was marked with a mark x. The results are shown in Tables 1 and 2.

[0017]

[Table 1]

[0018]

[Table 2]

As is clear from Tables 1 and 2, in Examples 1 to 5, the color change of the picture layer 2 was small and there was no peeling of the protective layer 3, but in Comparative Examples 1 and 3, the peeling of the protective layer 3 was not. And the change in the color of the picture layer 2 could not be measured.
Although no peeling of the protective layer 3 was observed, the change in the color of the picture layer 2 was large.

[0020]

As described above, the invention according to the first aspect of the present invention is a decorative plate having a pattern layer formed on the surface of an inorganic plate and a protective layer formed on the surface of the pattern layer, the inorganic plate comprising: The above-mentioned pattern layer is formed unevenly on the surface of the inorganic plate using a paint containing 60 to 90% by weight of the whole, so that the pattern layer is formed with a paint having an inorganic pigment content of 60 to 90% by weight. Thus, the deterioration of the pattern layer can be reduced, the disappearance of the pattern layer can be prevented, and the pattern layer is unevenly formed and formed on the surface of the inorganic plate, whereby the protective layer and the inorganic plate are brought into close contact with each other to form the pattern layer. And the occurrence of peeling of the protective layer can be reduced, and the weather resistance can be increased.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an example of an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 inorganic plate 2 picture layer 3 protective layer

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tsukuo Hoguchi 1048 Kazumasa Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Inventor Osamu Otsubo 1048 Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Works Co., Ltd.

Claims (1)

[Claims] 1. A decorative plate having a pattern layer formed on the surface of an inorganic plate and a protective layer formed on the surface of the pattern layer, wherein the pattern is formed by using a paint containing 60 to 90% by weight of the whole inorganic pigment. A decorative plate comprising a layer formed unevenly on the surface of an inorganic plate.