JPS5941793B2 - Decorative board manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a decorative board that has both three-dimensional effect and design.

To explain the present invention with reference to the drawings, as shown in FIG. 1, a uniform opaque base coating film 2 is provided on the surface of a base material 1 which has been subjected to a base treatment as necessary, and a gravure offset coating is applied on the base coating film 2. An arbitrary pattern layer 3 is provided by a printing method, a transparent resin coating 4 having a specular reflectance of 60% or more is applied on the pattern layer 3 by an arbitrary coating method, this is dried, and then the transparent resin coating 4 is applied by an arbitrary coating method. A transparent ink layer 5 is formed by applying a desired pattern on the coating film 4 using a transparent or colored transparent ink imparted with thixotropy using a screen printing method. This method of manufacturing a decorative board consists of a step of drying the layer while leaving the unevenness without leveling.

The surface treatment applied to the base material 1 is, for example, degreasing treatment, chemical conversion treatment, etc. in the case of a steel plate.

In order to provide a uniform opaque base coating layer 2, a opaque base paint is applied and dried, but since the purpose of this process is to obtain a smooth and uniform base surface, the coating method is as follows: A flow coater, a spray coater, etc. are preferable because they can provide as smooth a finish as possible. As the type of paint, polyester-based, acrylic-based, urethane-based, phenolic resin-based, and epoxy-based can be used. Next, pattern layer 3
can be printed in two or more colors as required. For the purpose of protecting the ink of this pattern layer 3, a transparent coating is applied to provide a transparent resin coating film 4. As the transparent resin, polyester, acrylic, urethane, and vinyl chloride resins can be used. Silicone-based or wax-based surface lubricants that would inhibit adhesion with the screen ink in the next process cannot be added to transparent paints, but as long as they do not inhibit the coating properties. , I can't stand it at all. Further, the surface gloss of the transparent coating film needs to have a specular reflectance of at least 40% or more, preferably 60% or more, in order to create a difference in gloss from the surface of the screen ink to be applied next. In addition, as for the coating method, a smooth finish is required like the base coating, but in this case, the coating film thickness does not need to be as thick as the base coating film 2, so in addition to flow coater, spray coater, gravure offset coater, roll coater etc. etc. can also be used. Next, transparent ink layer 5
For screen printing to provide an ink, a water-based acrylic resin-based transparent or colored transparent ink is used as the ink. Unlike regular oil-based screen inks, this ink is rich in thixotropy, and the surface does not level even after printing, and the unevenness of the screen texture remains on the ink surface. For example, manufactured by Toyo Ink Manufacturing Co., Ltd. This applies to acrylic emulsion ink (trade name: Riotone ink). In general, the rougher the screen mesh, the thicker the ink film and the rougher the finish, while the finer the screen mesh, the more delicate the finish is, although it lacks three-dimensionality. Usually, 200 meshes/inch to 30 meshes/inch is considered to be a practical range. The present invention has the above structure and is a special painting method for base materials such as steel plates and plywood, and has a unique expressive effect.

That is, after delicate printing is performed on the base coating film 2 using a gravure offset printing method, a transparent coat with a certain degree of gloss is applied, and a thixotropic transparent ink based on water-based acrylic resin is applied on top of this using a screen printing method. Since raised printing is performed and the gauze grains are left behind, the areas where the Riotone ink is applied become matte due to the gauze grains, and the areas where the Riotone ink is not applied are glossy due to the transparent coating layer. That is, because the specular reflectance of the transparent resin coating 4 and the transparent ink layer 5 formed by screen printing is high, and because the colored transparent ink forming the transparent ink layer 5 is thixotropic, there is no leveling after printing, and the screen gauze is not leveled. The effect is that the eyes are expressed as they are, and the surface condition has a cross-matte effect. Below are examples of the invention. (Example) An electrogalvanized steel sheet having a thickness of 0.5 mm was subjected to a chemical conversion treatment, and then washed with water and dried.

5μ of an epoxy resin primer coat was applied and dried. Next, 15μ of a brown base paint of thermosetting acrylic resin was applied using a flow coater and dried. The leather pattern was then printed using a gravure offset printing machine.
The ink used was alkyd-based. Furthermore, about 7 μm of a polyester transparent paint was applied using a gravure offset coater and dried. The surface gloss was 80. Next, a 60-mesh polyester screen with a gauze thickness of 300 μm was used as the screen plate, and an acrylic emulsion ink (trade name: Riotone) manufactured by Toyo Ink Manufacturing Co., Ltd. was used as the ink to create a tile-like abstract pattern. was printed. The viscosity of the ink is 8000
It was set as 0CPS. When dried in an oven at 180°C for 10 minutes, the areas to which the Riotone ink was applied showed unique unevenness, while the other areas were smooth, resulting in a decorative steel sheet with a very three-dimensional effect.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the manufacturing method of the present invention. 1...Base material, 2...Base coating film, 3.
...Picture layer, 4...Transparent resin coating film, 5.
...Transparent ink layer.

Claims (1)

[Claims] 1 A uniform opaque base coating layer 2 is provided on the surface of the base material 1 which has been subjected to a base treatment as necessary, an arbitrary pattern layer 3 is provided on the base coating layer 2, and an arbitrary pattern layer 3 is provided on the pattern layer 3. The specular reflectance is 6
A transparent resin coating film 4 of 0% or more is applied by any coating method, and an arbitrary pattern is printed on the transparent resin coating film 4 using a transparent or colored transparent ink imparted with thixotropy using a screen printing method. A method for manufacturing a decorative board, which comprises a step of applying a transparent ink layer 5 by twisting.