JPS6320587B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a construction board with an uneven pattern, and more specifically, it involves applying foamed ink to the surface of a substrate 1 to form a desired pattern and then heating it. After foaming and heating, the photopolymerizable paint 5 is applied while crushing the foamed layer 2 obtained after foaming with a coater roll 4, and the photopolymerizable paint 5 is cured before the crushed foamed layer 2 is completely restored. The present invention relates to a method for producing a construction board with an uneven pattern.

Conventionally, the method of adding uneven patterns to architectural boards was to apply a predetermined pattern to the board using foam ink, heat and foam it to form a foam layer, and then apply a top coat to the foam layer by spraying, etc. .
However, this method has the drawback that due to the flexibility of the foam layer 2, the top coat layer may crack or peel when force is applied. FIGS. 5 and 6 show a conventional construction board with an uneven pattern and a sectional view thereof.

The present invention has been made in view of the above points, and its purpose is to prevent cracking or peeling of the coating film even if force is applied from the surface side of the coating film.
To provide a method for manufacturing a construction board with an uneven pattern having a very natural finished appearance characterized by light and dark shades and fine unevenness.

The present invention will be explained below with reference to examples shown in the figures.

The substrate 1 provided with the uneven pattern is as shown in FIG. 3, and is made of hard vinyl chloride resin, and is provided with connecting portions 3 that fit into each other on both sides thereof.

In the present invention, foaming ink is applied to the surface of the substrate 1 to form a desired pattern and then foamed by blowing hot air at 150°C, for example, to form an uneven foam layer 2 on the surface of the substrate 1. get what is given. Next, this is passed through a coater roll 4 as shown in FIGS. 1 and 2. The coater roll 4 applies the photopolymerizable paint 5 while crushing the foamed layer 2. Here, an acrylic urethane modified resin type paint was used as the photopolymerizable paint. The coater roll 4 (diameter 30 cm) rotates in reverse (for example, at a rotational speed of 3 rpm) in the direction a in which the substrate 1 is transported (indicated by an arrow in FIG. 2).
Here, the photopolymerizable paint 5 enters the area where the foam layer 2 is crushed. In other words, when the foamed layer 2 is crushed, the bubbles in the foamed layer 2 expand and the photopolymerizable paint 5 enters into the foamed layer 2. Next, before the crushed foam layer 2 has completely recovered, a photopolymerizable paint 5 is applied to the surface by irradiating ultraviolet rays.
is cured to obtain a final product having a coating film cross section as shown in FIG.

As the photopolymerizable paint used in the present invention, in addition to those based on acrylic urethane modified resins, for example, polyester modified resins, acrylic epoxy modified resins, etc. are used. The coating amount, ultraviolet irradiation amount, etc. may be appropriately determined depending on the paint used. In addition, as substrates used in the present invention, in addition to the substrate 1 used in the above embodiment,
There is no problem even if it is made of a wood board, plywood, metal plate, etc., or if it has a different shape.

As described above, in the method of the present invention, a foamed ink is applied to the surface of a substrate to form a desired pattern, and then heated and foamed, and the foamed layer obtained after heating and foaming is crushed with a coater roll to form a photopolymerizable paint. Since the paint is cured after being applied, the paint remains in the crushed foam layer and is cured.
As shown in Figure 4, the cured coating film has a structure that is anchored tightly to the foam layer, which makes it easier to absorb and disperse the force applied to the coating film to the foam layer below, and also improves the adhesion of the coating film. It also improves properties and prevents cracking and peeling. In addition, the curing reaction of photopolymerizable paints caused by ultraviolet rays occurs very quickly and in a short period of time, and the crushed foam layer is cured before it is completely restored, so there are some differences in the state of restoration of the foam layer. This results in a textured architectural board having a finished appearance with a natural appearance characterized by pale color shading and fine irregularities. Furthermore, since a photopolymerizable paint is used for surface coating, there is an advantage that no distortion occurs because no heat is applied to the architectural board during the curing of the paint.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the state of coating with a coater roll in the method of the present invention, FIG. 2 is an explanatory diagram of the coating process, and FIG.
The figure is a schematic cross-sectional view showing the state of adhesion of the coating film of the product obtained by the present invention. FIG. 5 is a schematic perspective view of a product obtained by the conventional method, and FIG. 6 is a sectional view thereof. 1...Substrate, 2...Foamed layer, 4...Coater roll, 5...Photopolymerizable paint.

Claims (1)

[Claims] 1 After applying foamed ink to the surface of the substrate to form a desired pattern, it is heated and foamed, and the foamed layer obtained after heating and foaming is crushed with a coater roll while a photopolymerizable paint is applied, and the crushed foam is crushed. A method for producing an architectural board with an uneven pattern, characterized by curing a photopolymerizable paint before the layer is completely restored.