JP2001301084A - Inorganic decorative panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inorganic decorative panel excellent in physical strength, bonding and pulling-out strength or the like. SOLUTION: The inorganic decorative panel is constituted by bonding inorganic plates through an adhesive layer. The penicil hardness of the adhesive layer is 5B-4H and the thickness thereof is 30-300 μm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative plate obtained by laminating inorganic plates used for building interiors and the like via an adhesive.

[0002]

2. Description of the Related Art Conventionally, when a thick inorganic plate is used as a non-combustible plate for a cabinet, a kitchen member or the like, there has been a problem in workability and handling due to weight factors. In order to solve this problem, the thickness of the inorganic plate may be reduced.However, the physical strength of the plate, such as being peeled or crushed, is reduced, or a dowel, a nail, or a screw for joining the inorganic plate is used. However, when the door is attached to the inorganic plate with a hinge or the like, the joint pull-out resistance of screws or the like is reduced. on the other hand,
If an inorganic plate having a small specific gravity is used, the weight of the panel can be reduced even if the thickness is large. However, in this case, the same problem as described above occurs.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a decorative board which is excellent in physical strength, joint pull-out strength and the like.

[0004]

Means for Solving the Problems In order to solve the above problems, the present inventors have conducted intensive studies. As a result, by laminating two or more inorganic plates via an adhesive layer, the physical strength of the panel and the joint pull-out are obtained. It has been found that the resistance can be improved.

[0005] That is, the present invention provides an inorganic decorative board characterized in that an inorganic board is adhered via an adhesive layer. The adhesive layer may have at least one layer.

The adhesive for forming the adhesive layer should have a pencil hardness of 5B or more from the viewpoint of increasing the bond pull-out resistance, and should have a pencil hardness of 4H or less from the viewpoint of the physical strength of the adhesive layer itself. . Especially, it is more preferable that the pencil hardness is 3B or more and H or less. By using the above-mentioned adhesive, for example, when the door is fixed to the inorganic decorative plate with screws, the thread pull-out resistance of the thread part is reduced by the adhesiveness of the adhesive layer by the thread part penetrating the adhesive layer. It can be improved.

[0007] Further, when fixing with a joining member having no thread portion, such as a dowel, a nail, or the like, the members penetrate the adhesive layer so that the contact area between the adhesive layer and the member is increased. By increasing the value, it is possible to improve the joint pull-out strength.

In each case, the adhesive layer having a predetermined contact area with the joining member improves the physical strength, the resistance to pulling out the joint and the like, but the thickness of the adhesive layer is not limited to the joining member. The thickness may be 30 μm or more from the point of contact area with the substrate, but may be 300 μm or less from the viewpoint of economy. From the viewpoint of both characteristics, the range of 50 to 200 μm is particularly preferable.

Hereinafter, the inorganic decorative board according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view of a cross section of an inorganic decorative board 1 according to the present invention, in which two inorganic boards 2 are laminated and adhered via an adhesive layer 3, and a decorative layer 4 is provided on at least one side. It is what it was. FIG. 2 is a schematic view of a cross section of the inorganic decorative plate in a case where the adhesive layer 3 has two layers.

FIG. 3 is a schematic view showing a state in which a pair of surfaces of the inorganic decorative board 1 having the adhesive layer 3 according to the present invention are joined together by a dowel 6 which is a joining member. FIG. 4 is a schematic view showing a state in which a pair of lip faces of the inorganic decorative board 1 having the adhesive layer 3 according to the present invention are joined together by a dowel 6 serving as a joining member.

FIG. 5 is a schematic cross-sectional view showing a state in which the cut ends shown in FIG. 4 are joined by dowels, and FIG.
FIG. 3 is a schematic cross-sectional view showing a state in which the front surfaces of the inorganic decorative plates having two adhesive layers as shown in FIG. 2 are joined by dowels. Even in the case of joining the cut surfaces, the contact area between the dowel and the adhesive layer, which are the joining members, is large, so that the joint pull-out resistance can be increased. If necessary, two layers can be formed as shown in FIG. The contact area can be further increased by forming the adhesive layer as described above.

The type of the inorganic plate that can be used in the present invention is not particularly limited.
Examples include a volcanic glassy multilayer board, a slate board, a gypsum board, and a gypsum slag board.

The surface of these inorganic plates that contacts the decorative layer or the surface that contacts the adhesive layer may be provided with a sealer,
A base material treatment such as a sealing sealer or polishing may be performed.

The adhesive which can be used in the present invention is not particularly limited. For example, rubber-based, epoxy resin-based, urea resin-based, vinyl acetate resin-based, EVA resin-based, urethane-modified vinyl resin-based adhesives can be used. Adhesives such as urethane-modified vinyl resin type and hot melt type are exemplified. In particular, in order to increase the joint pull-out resistance, the pencil hardness of the adhesive should be in the range of 5B to 4H, and in particular, 3B to H can be suitably used.

The decorative layer can be formed by a known and commonly used cosmetic method, and examples thereof include urethane coating, polyester coating, decorative paper application, and plastic sheet application.

[0016]

EXAMPLES (Example 1) As an inorganic plate, specific gravity 0.7,
Two pieces of volcanic glassy multi-layer board base material having a size of 300 × 300 mm in length × width and thicknesses of 6 mm and 9 mm were prepared.
After applying a moisture-curable urethane sealer to one side, drying and further applying an epoxy-based UV-curable resin, irradiating with UV and curing, the surface is coated with abrasive paper (# 400). The surface was polished with a belt sander to smooth the surface. Subsequently, a colored urethane-based paint was applied and dried with hot air to obtain inorganic decorative plates having a thickness of 6 mm and 9 mm.

On the back of the obtained 6 mm inorganic decorative plate,
Curable vinyl acetate emulsion adhesive Y with pencil hardness F
F-100T (manufactured by Konishi Co., Ltd.) was applied at a rate of 200 g / m ² , and was placed so that the back surface of a 9 mm-thick inorganic decorative board was in contact with the adhesive, and was then pressed down to a total thickness of about 15 mm ( An inorganic decorative plate having an adhesive layer thickness of about 100 μm) was obtained.

(Comparative Example 1) Both sides of a volcanic vitreous multilayer plate having a specific gravity of 0.7, vertical and horizontal dimensions of 300 × 300 mm and a thickness of 15 mm were subjected to makeup in the same manner as in Example 1, An inorganic decorative board having a thickness of 15 mm was obtained.

Hereinafter, each test method of the inorganic decorative board of Example 1 and Comparative Example 1 will be described. (Bending strength) According to JIS A 5908-1994 bending strength test.

(Surface holding force for wood screws) JIS A 590
8-1994 Same as the wood screw retention test.

(Kokiguchi wood screw holding force) JIS A 59
08-1994 Perform the test according to the wood screw holding force test, and screw the wood screw into the wood opening.

(Surface dowel joint pull-out strength) From the inorganic decorative plates of Example 1 and Comparative Example 1, width (a) × length (b)
× A test piece having a thickness (c) of 50 x 50 x 15 mm was cut out. 7.8mm diameter, 12mm depth on the decorative surface of the test piece
The dowel hole was drilled. As shown in FIG. 3, a dowel having a diameter of 8 mm and a length of 30 mm was used, and a vinyl acetate resin-based emulsion adhesive # 5320 was applied to both the dowel and the dowel hole of the test piece.
(Manufactured by Sekisui Chemical Co., Ltd.) was applied and joined. 24
After a lapse of time, the tensile strength tester STROGRAPH
Using R (manufactured by Toyo Seiki Seisaku-sho, Ltd.), the wire was pulled at a load speed of about 2 mm per minute in a direction perpendicular to the bonding surface, and the maximum load at the time of pulling was defined as the dowel bonding pulling strength.

(Kikuguchi dowel joint pull-out strength) From the inorganic decorative boards of Example 1 and Comparative Example 1, width (a) × length (b)
× A test piece having a thickness (c) of 50 x 50 x 15 mm was cut out. 7.8 mm in diameter and 12 mm in depth
The dowel hole was drilled. As shown in FIG. 4, using a dowel having a diameter of 8 mm and a length of 30 mm, a vinyl acetate resin-based emulsion adhesive # 5320 was applied to both the dowel and the dowel hole of the test piece and joined. After a lapse of 24 hours, a tensile strength tester STROGRAPHR was used to pull in a direction perpendicular to the joint surface at a load rate of about 2 mm per minute, and the maximum load at the time of pulling was defined as the dowel joint pulling strength.

The results of the above tests are summarized in Table 1.

[0025]

[Table 1]

From the results shown in Table 1, it can be seen that any of the bending strength, the surface wood screw holding force, the wood edge wood screw holding force, the surface dowel joint pull-out strength, and the wood edge dowel joint pull strength of the inorganic decorative board according to the present invention of Example 1 are shown. It can be seen that the characteristics are also superior to those of the inorganic decorative board of Comparative Example 1.

[0027]

According to the present invention, it is possible to provide a decorative board excellent in physical strength, joint pull-out strength and the like.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an embodiment of an inorganic decorative board according to the present invention.

FIG. 2 is a schematic sectional view showing an embodiment of the inorganic decorative plate according to the present invention.

FIG. 3 is a schematic view showing a state in which a pair of surfaces of an inorganic decorative plate according to the present invention are joined together by a dowel as a joining member.

FIG. 4 is a schematic view showing a state in which a pair of wooden faces of the inorganic decorative board according to the present invention are joined together by a dowel as a joining member.

FIG. 5 is a schematic view showing a bonding cross section shown in FIG. 4;

FIG. 6 is a schematic diagram showing a bonding cross section when the number of adhesive layers is two.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inorganic decorative board 2 Inorganic board 3 Adhesive layer 4 Decorative layer 5 Inorganic decorative board 6 Dowel

Claims (4)

[Claims] 1. An inorganic decorative plate comprising an inorganic plate adhered via an adhesive layer. 2. The inorganic decorative board according to claim 1, wherein at least one adhesive layer is provided. 3. An adhesive forming the adhesive layer has a pencil hardness of 5B or more and 4H or less.
Or the inorganic decorative board according to 2. 4. The inorganic decorative board according to claim 1, wherein said adhesive layer has a thickness of 30 to 300 μm.