JPS5944429B2 - Manufacturing method of uneven pattern decorative board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a decorative board having an uneven pattern. cloth,
Alternatively, use impregnated paper or cloth obtained by impregnating and drying a thermosetting resin solution and fixing the microcapsule dye on the surface of the impregnated paper or cloth using a thermosetting resin adhesive, and place it on any base material. Then, by placing a forming plate on which an arbitrary uneven pattern can be applied in advance, and heating and pressurizing it according to the usual method for decorative boards,
The present invention relates to a method for manufacturing a decorative board with an uneven pattern in which the microcapsule dye is destroyed by using a slight pressure difference between the concave and convex parts of the decorative board, and the uneven pattern matches the shade of color.

Conventionally, methods for matching the color or light and shade with the uneven pattern of uneven patterned decorative boards include producing a decorative board with an uneven pattern by heating and pressing, and then coloring the concave or convex areas by painting, or A plurality of sheets of patterned paper were laminated together with a forming plate having an uneven pattern, and the convex portions of the uneven patterned decorative board obtained by heating and pressing were ground to reveal the color of the underlying layer.

However, with these conventional methods, the manufacturing process is long, requires a lot of effort, and tends to cause poor coating or grinding, which inevitably increases costs, and furthermore, the surface performance of the uneven pattern is poor. It also had a number of drawbacks, such as the need to apply transparent paint to improve its appearance.

The present invention has been made in view of these drawbacks of the conventional methods, and provides a simple method for manufacturing a decorative board in which the uneven pattern matches the shade of color.

First, the method for fixing the microcapsule dye to the surface of impregnated paper/cloth is as follows: (mix the microcapsule dye in a 1χ thermosetting resin solution and disperse it uniformly with a stirrer, etc.)
Next, a method of impregnating overlay paper, monochromatic pattern paper, cloth, etc. and drying it. (2) Applying a thermosetting resin adhesive to the surface of the impregnated paper that has been previously impregnated with a thermosetting resin and drying, and then applying the microcapsule dye. and (3) coating the surface of impregnated paper with a thermosetting resin and drying it with a heat-wetting resin adhesive mixed with the microcapsule dye. Either method can be adopted. It is possible.

Here, thermosetting resin and thermosetting resin adhesive are:
Thermosetting resins such as melamine resins, polyester resins, phenolic resins, diallyl phthalate resins, and urea resins, and thermosetting resin adhesives such as melamine resins, urea resins, and phenolic resins can be used.

In addition, microcapsule dyes have an outer diameter of several tens to several hundreds.
Dye pigment powder or liquid is contained in micron-granulated gelatinous capsules, and the amount of microcapsule dye fixed on the surface of thermosetting resin-impregnated paper is determined by the desired amount of decorative laminate. It can be used arbitrarily depending on the pattern, the difference in shading, etc.

The paper/cloth impregnated with the microcapsule dye prepared as described above is placed on multiple sheets of thermosetting resin-impregnated base material, or on plywood, particle board, hardboard, inorganic board, etc., and then an arbitrary uneven pattern is prepared in advance. A decorative board with an uneven pattern is created by placing a molded plate such as a coated aluminum plate, stainless steel plate, or plastic plate, inserting it into a press and molding it under heat and pressure to integrate it according to the usual method for decorative boards. is obtained.

A slight pressure difference occurs between the pressure per area between the concave portions and the convex portions of the concavo-convex pattern decorative board obtained during this molding.

As mentioned above, microcapsule dyes are granules in which the dye powder or liquid is wrapped in a gelatinous coating, so it is natural that the capsules will be destroyed by this pressure, and furthermore, the concave and convex portions of the decorative board will be destroyed. Due to this pressure difference, the degree of destruction will vary between parts.

In other words, the number of microcapsule dye particles that are destroyed increases in the recesses where the pressure is high, and the thermosetting resin, which was impregnated and dry, melts and flows when heated and pressurized, so the dye becomes wet. As the color develops, the surface area of the granular dye increases, resulting in a very bright color.

Furthermore, since the number of microcapsule dye particles destroyed in the convex portions where the pressure is low is smaller than that in the concave portions, the concave portions are not very vivid and the surface area of the particles is not very large.

The uneven patterned decorative board obtained as described above can change the color or shade of the concave and convex parts at the same time as heating and pressing, which simplifies the process and makes it cheaper. The degree of destruction of the microcapsule dye differs depending on the shape, and it is a cosmetic product that can obtain natural colors and shading that match the shape, and maintain the surface hardness and other properties inherent to thermosetting resin decorative boards. It is a decorative board.

Next, examples will be shown.

[Example 1] 1 part of red microcapsule dye was mixed and dispersed in 100 parts of melamine resin liquid, and this was mixed and dispersed at 130 f/? ? Z
When the pale yellow plain titanium paper of No. 2 was impregnated and dried at a temperature of 110°C for 5 minutes, the impregnation rate was 120 with red particles scattered on the surface.
% (dry resin amount 1.2 times the weight of the paper) was obtained.

Next, five sheets of kraft paper with a thickness of 0.2% impregnated with cresol resin liquid and dried were placed as a base material, and the decorative paper having the microcapsule dye on its surface was placed, and a stainless steel plate with an uneven pattern was placed on top of it. The template was placed and heated and pressed for 40 minutes at a temperature of 160°C and a pressure of 120 m/cwt using a press machine for manufacturing laminates. When the template was cooled and taken out, the entire surface of the concave part was red, and the convex part was A beautiful uneven decorative board with red spots dotted on a pale yellow background was obtained.

[Example 2] Melamine resin liquid was heated to 130 f? A solution prepared by mixing 0.5 parts of green microcapsule liquid with vinyl acetate resin adhesive was applied to the surface of 7 m2 of white titanium paper with an impregnation ratio of 120, which had been impregnated and dried. A white impregnated paper with green spots scattered on the surface was obtained.

A 3% thick plywood board was placed under this decorative paper, and a stainless steel molding plate with an uneven pattern was placed on top of these laminates, and then heated at a temperature of 130°C and a pressure of 18K using a press machine for manufacturing laminates.
After heating and pressurizing with ti/crA for 40 minutes, when cooled and taken out, the entire surface of the concave part was a bright green color, and the white surface of the convex part was dotted with green spots, making it a beautiful uneven surface. I got decorative plywood.

Claims (1)

[Claims] 1 Impregnated paper/cloth obtained by impregnating and drying using a thermosetting resin solution in which microcapsule dye is mixed and dispersed, or thermosetting resin on the surface of impregnated paper/cloth obtained by impregnating and drying a thermosetting resin solution. Using impregnated paper or cloth that fixes the microcapsule dye through an adhesive, place it on an arbitrary base material, and then place a molding plate on which an arbitrary uneven pattern can be applied in advance, following the usual method for decorative boards. A method for manufacturing a decorative board with an uneven pattern, characterized by heating and pressurizing it.