JPS6027586B2 - Method for manufacturing uneven pattern decorative material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a decorative material having an uneven pattern.
In particular, the present invention relates to a method of manufacturing a decorative material using a printing ink containing a heating foaming agent using a heating plate.

The conventional method for producing decorative materials with uneven patterns using printing ink containing a heat foaming agent uses a combination of normal printing ink and printing ink containing a heat foaming agent, and uses normal printing ink for the flat pattern areas and ink for the raised areas. The pattern area is heated by heating paper, plywood, vinyl chloride sheet, or a base material on which the printed paper is attached to plywood using a hot air dryer or IR dryer. This was a method in which only the printed areas of the printing ink containing a foaming agent were foamed to form convex areas.

In the conventional manufacturing method for such uneven pattern IQ materials, the heat transfer method is indirect through the air, so the heat transferred to the base material has large temperature unevenness. In addition, since air is passed through and heated gradually, the gas in the foaming agent easily evaporates, resulting in only a low foaming ratio, that is, a material with a small uneven pattern. In particular, when materials that require a large heat capacity, such as plywood or particle board, are used, temperature irregularities are large, the foaming effect is small, and the decorative material has a very uneven uneven pattern.
Furthermore, since the foamed portion is foamed freely in the air, it becomes a convex foamed shape as shown in FIG. 7, which causes problems such as sharp edges are missing in the uneven pattern. In addition, the paper is foamed using printing ink mixed with a heating foaming agent in advance to create uneven IQ paper.
Furthermore, when the textured paper is adhered to a substrate such as plywood using an adhesive, pressure is applied to the surface of the decorative paper, resulting in disadvantages such as crushing of the foamed convex portions of the decorative paper. The present invention solves the above-mentioned conventional drawbacks, and aims to produce sharp and uniform foamed areas with a high expansion ratio in a short period of time. A manufacturing method is provided.

That is, the present invention is characterized by using a heating plate instead of heating the secondary pot using an air layer, and by controlling the temperature and pressure of the platen, it is possible to completely and uniformly control foaming. There is. In the present invention, a substrate on which a desired pattern has been printed in advance with ordinary printing ink and printing ink containing a heating foaming agent is inserted between the heating plates of a flat plate press and then heated under pressure to uniformly generate a large amount of heat in a short time. It decomposes the foaming agent in the printing ink containing the foaming agent and softens the resin of the printing ink. Then, the pressing pressure of the hot platen is reduced to zero and the printing ink is held for 2 to 6 hours to foam the printing ink, and the upper surface of the foam layer is formed into a flat convex portion as shown in FIG. 4 by the hot platen of the press. The length of time for which the vertical pressure is maintained at zero is selected depending on the composition of the printing ink containing a foaming agent, the type of foaming agent, the amount added, etc., but according to the present invention, it is within the range of 2 to 6 times the current sand. Ta.

If the printing ink is heated for less than 2 seconds, the once-foamed printing ink will continue to foam a second time even after the hot disc is released, making it difficult to obtain the desired flat convex surface.

This is because if the printing ink is held for more than 6 degrees, the resin in the completely foamed printing ink is softened, so the foamed convex parts are likely to become wedged, making it difficult to obtain the desired flat convex surfaces.

Next, a finishing coat is applied using a transparent or colored transparent paint by a conventional method to obtain a gap material having an uneven pattern.

According to the present invention, all the above-mentioned conventional drawbacks are eliminated and '
a} Because the printing ink containing a foaming agent comes into direct contact with a heating plate that can supply a large amount of heat with little temperature variation, uniform foamed convex portions with a high foaming ratio can be obtained in a short time.

'b' Immediately before unplating, the compressive force is set to zero and held for 2 to 6 stages, so the upper surface of the foamed convexity becomes a flat surface in contact with the hot platen, resulting in a foamed convexity with a sharp uneven pattern. (c-
When printing on paper using a printing ink containing a foaming agent, it is possible to foam the paper at the same time as it is attached to a substrate material such as plywood, particle board, or calcium silicate board, improving work efficiency.

It has the following effects.

The base material in the present invention refers to 'a) sheet of paper, non-woven fabric, etc.'
o｝Organic board materials such as plywood and particle board with a base treatment, inorganic board materials such as gypsum board and Kical board with a base treatment, sheets such as paper and non-woven fabric, plywood, organic board materials such as particle board, gypsum board, and Kical board This refers to materials attached to inorganic plates such as aluminum plates, metal plates such as aluminum plates, galvanized iron plates, etc.

Further, the blowing agents used in the present invention include inorganic blowing agents such as sodium bicarbonate and calcium bicarbonate, and organic blowing agents such as azobisisoputyronitrile, benzenesulfonyl hydrazide and toluenesulfonyl hydrazide. The resins used in printing inks containing heating foaming agents include vinyl chloride resin, vinyl acetate resin, etc., which soften and foam easily when the ink is heated and the heating foaming agent decomposes, generating gas and foaming. Thermoplastic resins are suitable. Next, examples of the present invention will be described below.

Example 1 Vinyl chloride/vinyl acetate copolymer resin 10 parts (by weight) Coloring pigment 15 parts Sodium hydrate Solvent (methyl ethyl ketone/xylol) 12 parts Stabilizer 3 parts Printing ink 3 containing heat foaming agent made from the above formulation and ordinary Using the printing ink 2, gravure printing is performed on the surface of the paper 1 as shown in FIG. 1 to obtain decorative paper with a desired pattern.

Next, after inserting this I○o paper into a flat plate press, press and heat it (
Heating plate temperature 12 degrees 0, time 10 seconds, rolling pressure 5k9/ground)
After that, the pressure was set to zero and held for 5 seconds, and when the IQ crazy paper was removed from the disc, it was found that the decorative material (
Figure 2) was obtained. Example 2 Vinyl chloride/vinyl acetate copolymer resin 10 parts (weight) Coloring pigment 1 base azobisisobutyronitrile 25 parts Solvent (methyl ethyl ketone xylol) 10 parts Stabilizer 25 parts Heat foaming agent composed of the above formulation Using mixed printing ink 3 and ordinary printing ink 2, gravure printing is performed on the surface of paper 1 as shown in FIG. 1 to obtain IQ-hoko paper with a desired pattern.

The I○long paper was placed on the plywood base material 5 whose surface was coated with vinyl acetate adhesive 6 as shown in Fig. 3, and after being inserted into the flat plate press 7, it was heated under pressure (heating plate temperature 1290, time 13
After applying a dilution pressure of 5k9/min), the applied pressure was reduced to zero and held for 5 seconds. (Fig. 6) Then, the plywood is dismantled to obtain a plywood board (Fig. 4) with deep irregularities, a smooth upper surface of the convex portions, and a sharp and uniform pattern of irregularities. After this decorative plywood is cooled, It is coated with an aminoalkyd resin transparent paint using a flow coater, and dried to obtain a plywood board with a deeply uneven surface and a uniformly foamed uneven pattern as shown in Fig. 5.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a paper surface printed with normal printing ink and printing ink containing a heating foaming agent. FIG. 2 is a cross-sectional view of a printed pattern portion of printing ink mixed with a heating foaming agent, which is foamed. FIG. 3 is a sectional view of the printed pattern paper shown in FIG. 1 placed on plywood. FIG. 4 is a sectional view of the foamed and printed pattern paper of FIG. 3 in a state where the plywood base material is bonded. FIG. 5 is a sectional view showing the state shown in FIG. 4 coated with transparent paint. FIG. 6 is a cross-sectional view showing a pillow state in which the printing ink foams while the pressure is maintained at zero in Example 2. Figure 7 is a cross-sectional view of a conventional eq-drop board whose uneven pattern lacks sharpness. DESCRIPTION OF SYMBOLS 1...Paper, 2...Printed pattern part with normal printing ink, 3...Printed pattern part with printing ink mixed with heating foaming agent, 4...Transparent paint, 5...Plywood substrate, 6 ... Vinyl acetate resin adhesive, 7... Hot plate of flat plate press. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1 A base material printed with a desired pattern using ordinary printing ink and a printing ink containing a heating foaming agent is inserted as is or with another base material coated with adhesive on the surface between the hot discs of a flat plate press. Heat under pressure until it reaches a certain temperature, then reduce the pressure to zero and hold it for 2 to 60 seconds just before breaking the disc, then
The base material is unplated, and the printed pattern part with printing ink mixed with a heating foaming agent is made into a foamed convex part, and then the entire surface of the base material including the foamed convex part is finished with a transparent or colored transparent paint by a conventional method. A method for producing a decorative material with an uneven pattern having a uniform uneven pattern.