JPH0957713A - Method for wiping coating of thin veneer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the attractiveness of a pattern and improve the yield by wiping a coating film generated by a foundation coat excepting an embossed recessed part in the wiping of the surface of a thin veneer to which the foundation coat is applied, and applying a finishing of a different color from the foundation coat to the surface of the thin veneer. SOLUTION: A thin veneer 1 is embossed by an embossing device 7 including a base 7A and an embossing means 7B such as an embossing roll or an embossing plate. After the embossing step, the thin veneer 1 is set on a base board 9, and a foundation coat is applied to the surface of the thin veneer 1 to form a coat 3. After the step to apply the foundation coat, the coating film 3 generated by the foundation coat is wiped by a blade 10, and the coating film 3 is allowed to remain only in the embossed, recessed part 1A of the thin veneer 1, while the coating film 3 on the other part is wiped by the blade 10. After the wiping step, a finishing is applied to the surface of the thin veneer 1 to form the coating film. Thus it is possible to perform a wiping coating process without generating cracks or fissures in the thin veneer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiping coating method for a thin veneer used for a surface decorative material such as furniture.

[0002]

2. Description of the Related Art For example, the surface of a thin veneer used for a surface decorative material such as furniture is coated with a wood grain pattern. To apply such a coating to a thin veneer, the surface of the thin veneer is embossed with a wood pattern, then an undercoat is applied to the surface, and the surface of the veneered thin veneer is wiped. Then, the coating film formed by the undercoating is wiped off except for the embossed recesses, and a topcoating different in color from the undercoating is applied from the above. In this way, the color of the coating film of the topcoat and the color of the coating film of the undercoat overlap at the location of the embossed recesses on the surface of the thin veneer, making the color different from the other locations, and the grain pattern rises.

[0003]

However, since the conventional thin veneer has a thin thickness of approximately 0.5 to 0.8 mm, the embossing pressure is not uniform even when the substrate supporting the thin veneer is slightly uneven during embossing. As a result, it is difficult to make a rough pattern on the whole as a whole, and the embossing pressure may cause cracks in the thin veneer to split, and even slight unevenness of the substrate that supports the thin veneer during wiping. As a result, the wiping pressure becomes non-uniform, and the coating film from the undercoat remains on the areas other than the embossed recesses, causing uneven coating.
The wiping pressure may split the thin veneer. Further, the thin veneer may be subjected to a decolorizing treatment with a weak acid aqueous solution, but even in that case, the thin veneer may be split.

[0004]

As a means for solving the above-mentioned conventional problems, the present invention is a step 1 of attaching a cushioning backing sheet (2) to a thin veneer (1) and embossing the surface thereof. ． Step of applying an undercoat coating to the surface of the embossed thin veneer (1) 2. 2. Wiping the surface coated with the undercoat to remove the embossed recesses (1A) and wipe off the coating film (3) formed by the undercoat. The wiped thin veneer
(1) A step of applying a top coat different in color from the undercoat on the surface. The present invention provides a wiping coating method for a thin veneer (1) including steps 1, 2, 3, and 4 described above.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1, a cushioning backing sheet (2) is adhered to the back surface of a thin veneer (1) with an adhesive. As the adhesive, a vinyl acetate adhesive, an acrylic adhesive, a synthetic rubber adhesive, a vinyl acetate-ethylene adhesive, a phenol adhesive, a urea adhesive, a synthetic resin adhesive such as a melamine adhesive, Alternatively, a mixed adhesive of two or more kinds of the synthetic resin adhesives, for example, a mixed adhesive of a vinyl acetate adhesive and a melamine adhesive is used. The thin veneer (1) is a thin slice of wood and usually has a thickness of 0.5 to 0.8 mm. The backing sheet (2) has a cushioning property and is, for example, a non-woven fabric, a fiber knitted fabric, a plastic sheet, a plastic foam sheet or the like, and the thickness thereof is usually 0.2 to 0.4 mm. The thin veneer (1) is, if necessary, treated with a diluted weak acid aqueous solution such as acetic acid to dissolve and remove the resin component contained in the thin veneer (1). Decolorize the veneer (1). In this case, since the thin veneer (1) is reinforced by the backing sheet (2), the thin veneer (1) is not cracked or split by the decoloring treatment.

The thin veneer (1) is embossed with, for example, a wood grain pattern by an embossing device (7) including a base (7A) and embossing means (7B) such as an embossing roll and an embossing die plate. Even if the surface of the base (7A) of the embossing device (7) is not completely smooth and there are slight irregularities, such irregularities are due to the thickness of the backing sheet (2) of the thin veneer (1). It is absorbed by the change, and the embossing pressure is distributed almost evenly on the surface of the thin veneer (1), so that a clear embossing is applied as a whole. Further, as described above, since the embossing pressure is evenly distributed, stress concentration points do not occur, and the thin veneer (1) is prevented from cracking or splitting. Usually, the depth of the embossed recess (1A) by the embossing treatment is about 0.3 to 0.4 mm.

After the embossing step 1, the thin veneer (1) is set on the substrate (9), and the surface of the thin veneer (1) is coated with an undercoat as shown in FIG. A film (3) is formed. As the paint used for the coating, acrylic resin paint, styrene resin paint, vinyl acetate resin paint, vinyl chloride resin paint, styrene-butadiene resin paint, urethane resin paint, epoxy resin paint, melamine resin paint, alkyd resin paint, etc. Synthetic resin paint, nitrocellulose,
Cellulose resin paints such as cellulose acetate butyrate are used. The coating material may be either solution type or emulsion type.

After the undercoating step 2, the coating film (3) of the undercoating is wiped by a blade (10) as shown in FIG. 3, and only in the embossed recess (1A) of the thin veneer (1). The coating film (3) is left, and the coating film (3) at other places is wiped off by the blade (10). Even if the surface of the substrate (9) is not completely smooth in the wiping step 3 and there are slight irregularities, such irregularities are caused by a change in the thickness of the backing sheet (2) of the thin veneer (1). It is absorbed and the wiping pressure is evenly distributed on the surface of the thin veneer (1), and as a result, the coating film (3) except the embossed recess (1A) is completely wiped off by the blade (10). Moreover, since the wiping pressure is not partially concentrated, the thin veneer (1) is prevented from cracking or splitting.

After the wiping step 3, the thin veneer (1)
Apply a top coat on the surface of the film as shown in Fig. 4 (4)
The paint used for the overcoating is the same as the paint used for the undercoating, and a different color from the undercoating is used. For example, the color of the undercoat paint is black and the color of the overcoat paint is brown.

The decorative veneer (5) is manufactured in this manner. In the decorative veneer (5), the color of the coating film (4) of the top coat and the undercoating of the embossed recess (1A) are changed. The color of the coating film (3) overlaps, and for example, a wood grain pattern (6) appears to float on the surface.

As shown in FIG. 5, the decorative veneer (5) is laminated on the surface of a substrate (9) such as plywood, hard board, medium density fiberboard, etc. Used for door surface materials. In this case, the decorative veneer
Since (5) is adhered to the substrate (9) via the backing sheet (2), the adhesive strength can be improved by the backing sheet (2).

[0012]

In the present invention, since wiping coating can be performed on a thin veneer without causing cracks or splits,
A decorative veneer with a very clear pattern and high design is manufactured with good yield.

[Brief description of drawings]

 1 to 5 show an embodiment of the present invention.

1] Illustration of embossing process

[Fig. 2] Illustration of undercoating process

FIG. 3 is an explanatory diagram of a wiping process.

[Figure 4] Illustration of the top coating process

FIG. 5 is a partial perspective view of a surface decorative material.

[Explanation of symbols]

 1 Thin veneer 1A Embossed recess 2 Backing sheet 3 Base coat 4 Top coat 5 Veneer 6 Wood pattern 7 Embossing device 10 Blade

Claims (1)

[Claims] 1. A step of attaching a cushioning backing sheet to a thin veneer and embossing the surface thereof. 1. A step of applying an undercoat on the surface of the embossed thin veneer. 2. A step of wiping the surface on which the undercoat coating is applied to remove embossed recesses and wipe off the coating film by the undercoat coating. 3. A step of applying a top coat different from the base coat on the surface of the wiped thin veneer. Wiping coating method for thin veneer consisting of the above steps 1, 2, 3, 4