JPS6073940A - Decorative board and its production - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Conventionally, in order to form a transparent layer by coating the surface of a substrate with ceramics, a long period of high temperature was required, as exemplified by the above-mentioned drug. 1. There was a thermal spraying method as a ceramic coating that was practically carried out at room temperature.
The resulting coating layer was opaque and lacked aesthetic appeal in terms of color.

As a result of intensive research into creating a transparent ceramic coating layer even under an atmosphere of room temperature, the inventor of the present invention, Tyu, found that by reducing the size of the ceramic powder to be used below a certain level, the above-mentioned He completed this invention knowing that all the drawbacks of the conventional technology could be overcome.

This invention will be explained in detail below using examples.

In the drawing, the base materials are plywood, hardboard, particle board, steel plate, and aluminum plate.

Board materials such as asbestos cement board, pulp cement board, calcium silicate board 1 gypsum board, etc.
Base painting, sealer painting, thin paper pasting.

Patterns can be printed on board materials that have been treated with a base treatment such as pasting with resin-impregnated paper, or on the surface of board materials that have undergone a base treatment.

All kinds of materials can be used, including board materials that have been subjected to a decorative treatment such as pasting with decorative paper, decorative sheets such as decorative paper, decorative cloth, and decorative synthetic resin sheets. Reference numeral 2 denotes a transparent layer, which is formed by welding ceramic powder having a particle size of 6 μm or less on its surface.

Transparent layer 2f made of ceramic powder! f: To form on the surface of the base material 1, a technique of thermally spraying ceramic powder is used. The thermal spraying method is gas powder spraying.

Gas explosion thermal spraying and plasma thermal spraying are known, but gas explosion thermal spraying is the most suitable for this invention. However, it is of course possible to use gas powder spraying or plasma spraying.

It is necessary that the particle size of the ceramic powder used in this invention is 6 μm or less. Preferably it is 1μ or less. This is because if the sludge is too large, even if the ceramic powder welds to each other on the surface after thermal spraying to form a layer, many voids remain, and due to these voids, the material becomes cloudy instead of transparent. It is from. It goes without saying that even if the particles have a particle size of 6 μm or less, some particles with a particle size exceeding 6 μm may be present as long as a substantially desired transparent layer can be obtained.

In addition, the ceramic powders used are mullite, α
- Powders such as alumina and 7-lyca are common, but are not limited thereto.

Furthermore, if colored powder is mixed into ceramic powder and then thermally sprayed, a colored transparent layer of ceramics can be obtained, and the surface properties of the decorative material can be varied.

In addition, in order to adjust the transparency of the ceramic transparent layer, ceramic particles having a particle size exceeding 3μ are mixed in at 0.1 to 50"% by weight, preferably 0.1 to 20% by weight of the entire ceramic powder to be thermally sprayed. It's okay.

In addition, in order to impart functions such as hydrophilicity and release properties to the decorative material, a small amount of synthetic resin powder such as Teflon or polyethylene may be mixed in depending on the function.

Since this aA is constructed as described above, it has abrasion resistance, scratch resistance, and water resistance on the surface of any base material.

It is also possible to provide a decorative material that has a transparent layer with excellent chemical resistance.

[Example 1] Stainless steel (SUS-27) with a thickness of 111III
1. Apply about 100% of a-alumina powder with a particle size of 1μ or less onto the surface using an acetylene-oxygen gas explosion spraying machine.
When sprayed to a film thickness of 0μ, a transparent ceramic film with a smooth surface was obtained.

[Comparative Example 1] Thermal spraying was carried out under the same conditions as in Example 1, except that α-alumina with a particle size of about 5μ was used instead of α-alumina with a particle size of 7μ or less, and the surface condition was better than that in Example 1. Only a rough, cloudy ceramic film was obtained.

:Example 2] A very small amount of colored powder (iron oxide yellow and carbon black) was applied to the surface of a reinforced plastic bathtub with a thickness of about 3 am using a plasma spraying machine on alumina powder with a particle size of 1 to 3 μm. When thermal sprayed to a film thickness of approximately 200 μm, a ceramic film with a smooth surface and deep pale yellow color was obtained.

[Example 6] Green glass powder with a particle size of 2 to 6 μm was sprayed onto the surface of a 6 mm thick calcium silicate plate using a gas spraying machine to a film thickness of approximately 40 μm, resulting in a smooth surface. A transparent ceramic film colored pale green was obtained.

Example 4 After bonding a veneer of precious wood to the surface of a particle board with a thickness of 20 m, a 7-ethylene-oxygen gas explosion type thermal spraying machine was used to spray mullite powder and particles with a particle size of 1 to 2 μm. When a very small amount (5% by weight of the total) of mullite powder with a diameter of 5 to 10 microns was thermally sprayed to a film thickness of about 60 microns, a translucent ceramic film with a slightly rough surface was obtained.

[Example 5] On the surface of a steel plate with a thickness of 110 + 11, a-
By spraying alumina powder and a very small amount of Teflon powder, approx.
When the film thickness was set to 00 μm, a ceramic film with a smooth and water-repellent surface was obtained.

[Brief explanation of drawings]

The drawing is a sectional view showing an embodiment of the present invention. In the drawings, 1 indicates a base material and 2 indicates a transparent layer. Patent applicant Hyota Sangyo Co., Ltd.

Claims (1)

[Scope of Claims] (1) A decorative material in which ceramic powder having a particle size of 3 μm or less is welded to each other on the surface of a base material to form a transparent layer. (2) The decorative material according to claim 1, wherein the transparent layer is a colored transparent layer. (3) The decorative material according to claim 1, wherein the transparent #8J layer is semitransparent. (4) The decorative material according to claim 1, wherein a synthetic resin is mixed in the transparent layer. (5) A method for producing a decorative material, which comprises spraying ceramic powder having a particle size of 6 μm or less onto the surface of a base material using a thermal spraying method to form a transparent layer on the entire surface. (6) Claim 5, characterized in that ceramic powder with a particle size of 6μ or less is mixed with a coloring agent and then thermally sprayed.
Method for manufacturing the decorative material described in Section 1. (A method for producing a decorative material according to claim 5, characterized in that a small amount of ceramic particles having a particle size of more than 6μ is mixed into a ceramic powder having a particle size of less than 6 μm and thermally sprayed. 6.) A method for producing a decorative material according to claim 5, characterized in that a synthetic resin powder is mixed into a ceramic powder having a particle size of 6 μm or less and thermally sprayed.