JPS6010789B2 - Painted wooden products and their surface finishing methods - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to wooden painted products such as counters and doors, and a surface finishing method thereof.

Conventionally, this type of wooden painted product has had a coating film formed of polyurethane resin, lacquer, etc. on the upper surface of an intermediate coating layer of polyester resin or polyurethane resin.

However, because the coating film formed from the polyurethane resin or lacquer has low hardness, it has the disadvantage that it is easily scratched by cardboard during transportation, or by simply moving tableware or the like on top of it.

In addition, the conventional surface finishing method involves applying a polyester resin or polyurethane resin paint, and after this intermediate coat is naturally cured, a polyurethane resin paint or lacquer is applied and allowed to naturally cure, which improves productivity and improves productivity. Workability was poor.

Therefore, the object of the present invention is to eliminate the above-mentioned drawbacks, further increase surface hardness, and improve productivity and workability.

The basic structure of the present invention is to apply an ultraviolet curable acrylate resin paint to the top surface of the intermediate coating layer, and irradiate it with an ultraviolet lamp to form a hard acrylate resin coating on the painted surface. be.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In the figure, A is a wooden product such as a counter or a door, and on its surface a, a color stopper layer 1 made of polyurethane resin, an undercoat layer 2 made of polyurethane resin, a color stopper layer 3 made of transparent polyurethane resin, An intermediate coating layer 4 made of a polyester resin or a polyurethane resin and an overcoat layer 5 made of an ultraviolet curable acrylate resin are sequentially laminated.

That is, to explain the process according to the steps, first, as shown in FIG. 1, the surface a of a wooden product A such as a counter or a door is polished into a flat surface using a file or the like, and then a colored filler layer 1 is formed. This filler colored layer 1 is filled with the wood holes b exposed on the surface a of the wooden product A by applying a polyurethane resin paint, and is colored so that the wood grains appear clearly. Next, as shown in Figure 2, following the first step of the filler colored layer, a polyurethane resin paint is applied as the undercoat layer 2 to give it a tub color that is almost the same color as the finished product. After the second step, as shown in FIG. 3, a transparent polyurethane resin paint is applied to form a color stopper layer 3 to prevent the paint of the undercoat layer 2 from lifting.

After the above three color fixing steps, a polyester resin or polyurethane resin paint is applied as an intermediate coating layer 4 to give a solid feel. At this time, the paint for the intermediate coating layer 4 is
As shown in the figure, by applying the coating horizontally on the upper surface, a so-called mirror finish 6, in which the surface of the finished product becomes mirror-like, is formed.

Moreover, by applying the coating to an even thickness as shown in FIG. 5, a so-called semi-open finish 7 is obtained. Next, after the paint for the intermediate coat layer 4 has hardened, its surface is polished smooth to make it easier for the paint for the top coat layer 5 to adhere to it.

As shown in FIGS. 6 and 7, the top coat layer 5 is formed by applying an ultraviolet curable acrylate resin paint to a uniform thickness by spraying or curtain coating. And finally the 8th
As shown in the drawings and FIG. 9, the coating material of the top coat layer 5 is irradiated for several seconds with an ultraviolet lamp 8 of an appropriate wattage, for example, an 8 skin/skin type.

As a result, hard ruts 5' of the acrylate resin coating are formed on the painted surface of the wooden product A. As described above, the present invention has an overcoat layer made of ultraviolet curable acrylate resin on the top surface of the intermediate coat layer of polyester resin or polyurethane resin, so it can be formed using conventional polyurethane resin or lacquer. The hardness of the coating film is improved from, for example, pencil hardness of about 4 days to about 7 days, and as the hardness increases, it becomes less likely to be scratched and stain resistance improves. Furthermore, since the acrylate resin has high adhesion to the polyester resin or polyurethane resin of the intermediate coating layer, a strong coating film can be formed.

In addition, in this surface finishing method, an ultraviolet-curable acrylate resin paint is applied to the top coat of the surface of the wooden product and cured by irradiating it with an ultraviolet lamp, resulting in higher productivity than the conventional natural curing method. and workability is improved.

[Brief explanation of the drawing]

The drawings show embodiments of the wooden painted product and surface finishing method of the present invention, and FIGS. 1 to 9 are longitudinal sectional views showing the present invention step by step. In the figure, A...wood product, 4...intermediate coat layer, 5...top coat layer, 5'...paint film, 8...
...UV lamp. Figure 1 Figure 2 Figure 3 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Scope of Claims] 1. Wooden painted products such as counters and doors, comprising an intermediate coating layer of polyester resin or polyurethane resin and a tough top coating layer of ultraviolet curable acrylate resin provided on the upper surface thereof. 2. When painting wooden products such as counters and doors, apply a polyester resin or polyurethane resin paint as an intermediate coat, then apply an ultraviolet curing acrylate resin paint to the coated surface, and irradiate it with an ultraviolet lamp. A method for finishing the surface of a painted wooden product, characterized by forming a coating film of acrylate resin.