JPH062391B2 - Metal sprayed wood - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a metal sprayed wood having a metal sprayed film provided on the surface of a wood base material, and a synthetic resin film is interposed between the wood base material and the metal sprayed film. Thus, the adhesion of the metal sprayed film to the wood base material is improved.

[Conventional technology and its problems]

BACKGROUND ART Conventionally, a metal sprayed film is provided by spraying a metal such as aluminum on the surface of wood to improve the fire resistance and weathering resistance of wood and give a unique metallic appearance.

However, in such a metal sprayed wood, the surface of the metal sprayed film inevitably becomes a minute uneven surface due to the manufacturing method and is finished in a matte state. Therefore, when a glossy finish is required, the surface of the metal sprayed film must be polished by buffing to give a glossy finish. However, since the adhesion between the metal sprayed film and the wood is not sufficient, there is a problem that the metal sprayed film is peeled off due to frictional force during polishing work, and it is difficult to obtain a glossy surface. Further, since the adhesion of the metal sprayed film is insufficient, the metal sprayed film is easily peeled off even in normal use,
There was a lack of durability.

[Means for solving problems]

Therefore, in the present invention, a synthetic resin film is provided on the surface of the wood base material in advance, and a metal sprayed film is provided on the surface of the wood base material to improve the adhesion to the wood base material of the metal sprayed film, thereby solving the above-mentioned disadvantage I chose

FIG. 1 and FIG. 2 show an example of the metal sprayed wood of the present invention, in which reference numeral 1 is a wood base material. In this example, the wooden base material 1 has a flat plate shape, but is not limited to this, and a material processed into an arbitrary shape can also be used. The type of the wood base material 1 is not particularly limited, and natural wood moku wood, plywood, decorative plywood and the like are used. As the natural wood, tree species such as beech, oak, agathis, mahogany, sen, and spruce are used, but not limited to these, and generally wood having a small amount of tar component in wood is preferable. .

A synthetic resin film 2 is provided on the surface of the wooden base material 1, that is, the surface on which the metal sprayed film is provided. This synthetic resin film 2 is intended to improve the adhesion between the wood base material 1 and the metal spray coating, and has a thickness of 10 after applying a thermoplastic resin liquid or a thermosetting resin liquid to the wood base material 1 and drying it. ˜100 μm. As the thermoplastic resin liquid, an organic solvent solution or emulsion of acrylic resin, vinyl acetate resin or the like is used. Further, as the thermosetting resin liquid, an uncured resin liquid such as melamine resin, epoxy resin, polyurethane resin, or a resin solution obtained by diluting this with an organic solvent is used. These resin liquids have low viscosity,
It is preferable in terms of penetrability and adhesiveness to the wooden base material 1. In addition, ordinary synthetic resin paints for wood can be used as well.
For the coating, ordinary brush coating, spray coating, dipping or a method using a coater such as a roll coater, a flow coater, or a curtain coater is appropriately adopted. Drying is performed by air drying, forced drying using a heating furnace, an infrared heating device, or the like. When the thermosetting resin liquid is used to form the synthetic resin film 2, it is not necessary to intentionally crosslink and cure it, and it is sufficient to simply dry it.
This can be hardened by the heat of metal spraying in the next step,
In addition, the co-curing with metal spraying is preferable because the adhesion of the metal sprayed film is improved. Since this synthetic resin film 2 is a resin liquid that has penetrated into the base material 1 and solidified, it adheres and adheres well to the wood base material 1 without peeling.

A metal sprayed film 3 is formed on the synthetic resin film 2 by spraying a metal. The metal spraying is performed by using an arc spraying device, and is performed by spraying a wire material such as copper, aluminum, or zinc on the synthetic resin film 2 in a molten state at a high speed during the arc. The surface of the metal sprayed film 2 has a slight unevenness and has a matte finish. If the metal is copper, the sprayed film 3 has a red copper color, and if aluminum or zinc is used, a silver-white sprayed film 3 is obtained. can get. The interface between the metal sprayed film 3 and the synthetic resin film 2 is uneven as shown in an enlarged view in FIG. 2, and the metal sprayed film 3 and the synthetic resin film 2 are in a state of being interdigitated with each other. ing. This is because, at the time of metal spraying, high-speed metal particles are hit against the synthetic resin film 2, and the particles partially dissolve the synthetic resin film 2 and enter the inside. The metal sprayed film 3 and the synthetic resin film 2 are bonded to each other by such microscopic asperities, and as a result, the adhesion of the metal sprayed film 3 is improved. The thickness of the metal sprayed film 3 is arbitrarily determined according to the application of the metal sprayed wood and the like, but is usually in the range of 100 to 200 μm from the viewpoint of adhesion, economy and the like.

In addition to the wire material, the metal spraying is also performed by a powder method of melting and spraying metal powder. In actual work, JIS-H-8301 (aluminum spraying), JIS-H-9301 (aluminum spraying work standard), JIS-H-8300 (zinc spraying), JIS
It is convenient to refer to, for example, H-9300 (zinc spraying crude industry standard).

[Action]

In such a metal sprayed wood, since the synthetic resin film 2 adheres well to the surface of the wood base material 1 and the metal sprayed film 3 adheres well to the synthetic resin film 2, the metal sprayed film 3 is eventually synthesized. The resin film 2 is firmly adhered to the wood base material 1. Further, since the water content in the wooden base material 1 is blocked by the synthetic resin film 2, the metal resin film 3 is not corroded by this water content. Furthermore, it is possible to prevent cracks and dimensional changes caused by water movement due to a rapid temperature rise during metal spraying.

〔Example〕

80 to 1 on the surface of the beech plate material (1 cm x 50 cm x 50 cm)
After grinding with No. 00 abrasive paper, acrylic resin emulsion was applied and dried at 80 ° C. to form a synthetic resin film having a thickness of 50 μm. An aluminum wire was sprayed on this synthetic resin film at a current of 70 to 100 A, a voltage of 28 V, an air pressure of 0.5 MPa, and a spraying distance of 30 cm by using an arc spraying device, and an aluminum sprayed film having a thickness of 100 μm was provided. I got wood.

Next, the aluminum sprayed film of this aluminum sprayed wood was cut into crevices at 1 mm intervals, cellophane adhesive tape was applied from above, and peeled off to perform an adhesion test of the aluminum sprayed film. The residual ratio was 100/100 (n = 20), and nothing was taken by the cellophane adhesive tape, showing extremely excellent adhesion.

On the other hand, when a similar adhesion was performed on a beech material directly sprayed with aluminum without providing a synthetic resin film,
Residual rate of aluminum sprayed film is 30/100 to 50/1
The adhesion was extremely poor.

〔The invention's effect〕

As described above, the metal-melted wood of the present invention has the metal sprayed film provided on the surface of the wood base material through the synthetic resin film, and therefore the wood base material of the metal sprayed film is interposed by the synthetic resin film. The adhesion is extremely high.

Therefore, the metal sprayed wood of the present invention has excellent durability without the disadvantage that the metal sprayed film is easily peeled off in normal use. Also, even when the surface is glossy finish, the metal sprayed film does not peel off due to polishing,
The polishing work can be performed with confidence and a good glossy surface can be obtained.

[Brief description of drawings]

1 and 2 show an example of the metal sprayed wood of the present invention. FIG. 1 is a schematic sectional view, and FIG. 2 is an enlarged schematic sectional view of a main part of FIG. 1 ... Wood base material, 2 ... Synthetic resin film, 3 ... Metal sprayed film.

Claims (1)

[Claims] 1. A metal sprayed wood comprising a wood base material and a metal sprayed film provided on the surface of the wood base material via a synthetic resin film.