JPH07304246A - Production of decorative sheet - Google Patents

Abstract

PURPOSE:To form a sharp recessed part on the surface of a decorative sheet by performing the heating of a chemical agent generating decomposing gas by heating and the drying and curing of paint and allowing the paint applied to a printing pattern to protrude by the decomposing gas generated in this process and grinding the formed protruding part before subjecting the coated surface to thermal press treatment. CONSTITUTION:After a printing pattern is applied to a substrate 1 using ink 2 mixed with a chemical agent generating decomposing gas by heating, paint prepared by mixing an unsaturated polyester resin and isocyanate is applied to the substrate 1. Next, the whole is heated to temp. decomposing the chemical agent suddenly to perform the decomposition of the chemical agent and the drying and curing of the paint and the paint applied on the printing pattern is allowed to protrude by the decomposing gas generated in this process. After the protruding part is ground, the surface of the substrate is subjected to thermal press treatment to obtain a decorative sheet having a sharp recessed part 3 formed on the surface thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a decorative sheet.

[0002]

2. Description of the Related Art As shown in Japanese Patent Publication No. 51-49246, when printing on a substrate, decomposition gas is generated by chemically reacting with an acidic curing catalyst of an overcoat paint of an acidic curable resin in the ink. Printing with ink mixed with chemicals, after coating the top coating of an acid curable resin using an acid curing catalyst, it is dried and cured, and at the same time raised the top coating with decomposition gas to form a convex portion by the ink, It was manufactured by grinding this convex portion.

[0003]

According to the method of the prior art described above, it is possible to manufacture a decorative plate having a concave portion which is synchronized with the printed pattern, but the tip convex portion of the portion raised by decomposition gas is ground to form a concave portion. As a result, the edge of the recess actually rises as shown in FIG. 2, and it is difficult to say that the recess is sharp.

[0004]

In order to solve the above-mentioned problems, the present invention provides a print pattern on a substrate after using an ink containing a chemical agent that generates a decomposition gas by heating, Apply a paint mixed with unsaturated polyester resin and isocyanate to the above and heat it at a temperature at which the drug rapidly decomposes to decompose the drug and dry-cure the paint. The coating applied to the swelling is raised, the convex portion is ground, and then the surface is subjected to a heat pressing treatment. In the method, a decomposition gas is generated by reacting with the acid-curable catalyst. After printing a pattern on a substrate using an ink mixed with a chemical, a coating composition obtained by adding an aminoalkyd resin and an acid catalyst to an unsaturated polyester resin is mixed and applied onto the substrate. Decomposition of the drug and drying and curing of the paint at a temperature above the speed at which the curing reaction of fat is rapidly accelerated, the paint applied on the printed pattern is raised by the decomposition gas generated in this process, and after grinding this convex part, The method is characterized in that the surface is subjected to a heat pressing treatment, and in the claim 3, a printed pattern is formed on the substrate by using an ink mixed with an agent that reacts with an acid-curable catalyst to generate a decomposition gas. After that, paint on which aminoalkyd resin is mixed with alkyd resin and acidic catalyst is applied on top of this, the drug is decomposed and the paint is dried and hardened at high temperature, and the decomposition gas generated in this process is applied on the printed pattern. The method was characterized in that the coating material was raised, the convex portion was ground, and then the surface was subjected to hot pressing.

As the substrate, a paper or synthetic paper having a weight of about 20 to 80 g / m ² or a synthetic resin film having a thickness of about 0.05 to 0.5 mm is used, and a weight of 23 to 3 is particularly preferable.
A thin paper of 0 g / m ² is preferably used. The reason is that not only is the price low, but the surface is smooth and printing is excellent.

A base color layer is formed on the substrate. The base color layer is a basic color of the decorative sheet, and is printed and formed on the entire surface by using a normal gravure ink by a gravure printing device or the like. A base pattern layer is formed on the base color layer as needed. The base pattern layer is the pattern of the actual decorative sheet and may be formed in 2 to 4 layers to complicate the pattern.

Next, a concave portion is formed by a foaming process. Here, as the foaming treatment method,

[0008] A printed pattern is formed on a substrate using an ink mixed with a chemical agent that generates a decomposed gas by heating, and then a paint obtained by mixing an unsaturated polyester resin and an isocyanate with a saturated polyester resin is applied onto the substrate. The chemical is decomposed and the coating is dried and hardened by heating at a temperature at which the chemical is rapidly decomposed. The decomposed gas generated in this process raises the coating applied on the printed pattern and grinds the convex portion.

An ink containing an agent which reacts with an acid catalyst of an acid-curable resin to generate a decomposition gas is used to form a printed pattern on a substrate, and then an unsaturated alkyd resin and an acid are mixed with an unsaturated polyester resin. Applying a coating with a catalyst added and mixed, dry and cure at a temperature or higher that accelerates the curing reaction of the unsaturated polyester resin rapidly, and raise the coating applied on the printed pattern by decomposition gas generated in this process, The convex portion is ground.

An ink containing an agent which reacts with an acid catalyst of an acid-curable resin to generate a decomposition gas is used to form a print pattern on a substrate, and then an alkyd resin and an acid catalyst are added to an aminoalkyd resin. The additive-mixed paint is applied, dried and cured at a high temperature, the decomposed gas generated in this process raises the paint applied on the printed pattern, and this convex portion is ground.

Methods such as

On the surface of the substrate formed by these methods, the edge of the recess is raised as shown in FIG.
This surface is subjected to hot pressing to form a smooth ridge on the edge of the recess. A press board and a press roll are used as the pressing device. Pressure is 1 to 5 kg / cm ² , temperature is 1
It may be about 00 to 180 ° C.

[0013]

According to the present invention, after the concave portion is formed, it is subjected to the thermal compression treatment so that the edge portion 4 of the concave portion 3 is formed as shown in FIG.
Since the swelling portion can be formed smoothly as shown in FIG. 1, it is possible to obtain a decorative sheet having a sharp concave portion.

Specific examples of the present invention will be described below.

[0015]

【Example】

(Example 1) A natural color gravure ink was printed on the entire surface of a thin paper of 25 g / m ² using a gravure printing machine to form a base color layer. 1 pearl pigment on the ink
2% by weight was added to print a natural color gravure ink which is brighter than the above-mentioned base color layer and has a color closer to white, and a natural color gravure ink which is darker than this wood grain base pattern. On this, a conduit groove pattern was printed in a wood grain pattern with a brown color ink comprising 50 parts by weight of a cellulose resin, 30 parts by weight of a pigment, 50 parts by weight of a solvent, and 40 parts by weight of DPT. On top of this, amino alkyd resin 100
Parts by weight, 15 parts by weight of alkyd resin, acidic catalyst (50%
(Solution) 10 parts by weight of solvent added to the entire surface 1
After applying 5 g / m ^2, it was heated and dried at 140 ° C. for 20 seconds to generate decomposition gas, and the channel groove pattern portion was raised in a convex shape. After this was cured, the convex portion was ground with a # 150 buff roll to form a concave portion, which was heat-pressed with a hot press roll at a pressure of 3 kg / cm ² and a temperature of 110 ° C. to obtain a desired decorative sheet. . The concave portion formed by the foaming treatment on the surface of the decorative sheet obtained by this method had a smooth bulge at the edge and was finished extremely sharply.

(Example 2) A dark color gravure ink was printed on the entire surface of a synthetic paper of 32 g / m ² using a gravure printing machine to form a base color layer. A dark color gravure ink, which is lighter in white than the ground color layer, and a dark color gravure ink, which is darker than the wood grain ground pattern, were printed thereon. On this, a conduit groove pattern was printed in a wood grain pattern with a dark color ink containing 50 parts by weight of a cellulose resin, 30 parts by weight of a pigment, 50 parts by weight of a solvent, and 40 parts by weight of toluenesulfonyl hydrazide. On this, 150 parts by weight of saturated polyester resin, 100 parts by weight of unsaturated polyester resin, 50 parts by weight of isocyanate,
Further, a coating material containing an appropriate amount of a solvent was applied on the entire surface in an amount of 15 g / m ² and then heated and dried at 210 ° C. for 30 seconds to generate a decomposition gas, and the channel groove pattern portion was raised in a convex shape. After curing this, the convex portion was ground with a # 150 buff roll to form a concave portion, and the pressure was 3 kg / cm with a hot press roll.
^{2. The} decorative sheet was obtained by heat pressing at 110 ° C. The concave portion formed by the foaming treatment on the surface of the decorative sheet obtained by this method had a smooth bulge at the edge and was finished extremely sharply.

(Example 3) An ivory color gravure ink was printed on the entire surface of a thin paper of 25 g / m ² using a gravure printing machine to form a base color layer. 12% by weight of a pearl pigment was added to the ink, and an ivory-colored gravure ink having a whiter color which was lighter than the undercolored layer was used as a wood grain background pattern. On top of this, 50 parts by weight of cellulose resin, 30 parts by weight of pigment, 50 parts by weight of solvent, DP
It was printed in a grain shape of wood with an ivory color ink composed of T40 parts by weight. On top of this, unsaturated polyester resin 50
15 parts by weight, 40 parts by weight of melamine alkyd resin, 10 parts by weight of acidic catalyst (50% solution), 5 parts by weight of silicone resin solution and 15 g / m ^{2 of} an appropriate amount of solvent added to the entire surface, and then 170 ° C. for 20 seconds. It was heated and dried to generate decomposition gas, and the conduit groove pattern portion was raised in a convex shape. After this was hardened, the convex portion was ground with a # 150 buff roll to form a concave portion, and the pressure was 3 kg / cm ² with a hot press roll.
A hot pressing process was performed at a temperature of 110 ° C. to obtain a desired decorative sheet. The concave portion formed by the foaming treatment on the surface of the decorative sheet obtained by this method has a smooth ridge on the edge,
It was extremely sharp.

[0018]

According to the present invention, after the recess is formed,
By performing the heat-pressing process, the edge of the recess can be made to have a smooth bulge, so that a decorative sheet having a sharp recess can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of a decorative sheet according to the present invention.

FIG. 2 is a cross-sectional view of a conventional decorative sheet.

[Explanation of symbols]

 1 Base 2 Ink 3 Recess 4 Edge

Claims (3)

[Claims] 1. A printing pattern is formed on a substrate by using an ink mixed with a chemical agent that generates a decomposition gas when heated, and then a coating material to which an unsaturated polyester resin and an isocyanate are added and mixed is applied onto the substrate. Is heated at a temperature at which it rapidly decomposes to decompose the chemicals and dry and harden the paint, and the decomposition gas generated in this process raises the paint applied on the printed pattern, grinds the convex parts, and then the surface A method for producing a decorative sheet, which comprises performing a heat pressing process. 2. A printed pattern is formed on a substrate by using an ink mixed with a chemical agent which generates a decomposition gas by reacting with an acid curable catalyst, and then an unsaturated alkyd resin and an aminoalkyd resin and an acid catalyst are formed thereon. Is added and mixed, and the composition is decomposed and the coating is dried and cured at a temperature or higher that accelerates the curing reaction of the unsaturated polyester resin rapidly,
A method for producing a decorative sheet, characterized in that the paint applied on a printed pattern is raised by the decomposed gas generated in this process, the convex portion is ground, and then the surface is subjected to hot pressing. 3. A printed pattern is formed on a substrate by using an ink mixed with a chemical agent that reacts with an acid-curable catalyst to generate a decomposition gas, and then an alkyd resin and an acid catalyst are added to an aminoalkyd resin. Apply the mixed paint, decompose the drug at high temperature and dry-cure the paint, raise the paint applied on the printed pattern by the decomposition gas generated in this process, grind the convex parts, and then clean the surface. A method for producing a decorative sheet, which comprises performing a heat pressing process.