JPH0434461B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a decorative board used for walls, ceilings, floors, etc. of houses, and is a decorative board with a veneer having a plurality of parallel grooves. Regarding the manufacturing method.

[Prior Art] Conventionally, the method for forming narrow grooves on the surface of a decorative board is to attach a decorative sheet such as a decorative board, synthetic resin film, or veneer to a wooden substrate such as plywood or particle board using a commonly used adhesive. After adhering to the surface of an inorganic substrate such as a calcium silicate board or a gypsum board to create a decorative board, multiple thin grooves are cut from the surface of the decorative board parallel to the long sides of the board using a cutter saw. Next, the inside of the narrow groove is painted in a desired color, or short fibers are flocked, and after pasting thin paper tape, colored paint is applied as an undercoat, or after undercoating, the narrow groove is cut and narrowed. The method used was to apply makeup to the grooves and then apply a final coat of paint.

By the way, since the processing of the narrow groove involves cutting down to the substrate as described above, the groove is at least 3 mm or more, preferably 44 mm.
Unless a relatively thick substrate with a thickness of mm or more is used, it is not possible to achieve a uniform depth and width and to give a three-dimensional appearance to the decorative board.

Furthermore, in the case of decorative boards made of plywood or particle board, the thickness of the top veneer that makes up the plywood and the chip layer on the surface that makes up the particle board are very thin, only about 0.5 to 1.0 mm. When cutting is performed to form the grooves, the core veneer in which the fiber direction of the veneer is perpendicular to the longitudinal direction of the decorative laminate and the very rough surface of the core layer chips are exposed. If wood is cut in a direction perpendicular to its fiber direction, the cut end will be fluffy and the cut surface will not be beautiful. Therefore, when the core board of plywood or the chip of the core layer of particle board is cut with a cutter or saw, that part becomes fluffy, and the inside of the narrow grooves of the decorative board end up with an extremely unsightly finish. In addition, the core veneers of plywood are of lower quality than the front veneers, so veneers with rougher colors and textures are often joined together, and in such cases, the inside of the grooves Due to the need to unify the color tone, there are problems such as the extremely labor-intensive process required to manufacture decorative boards, such as applying a large amount of dark paint to the grooves and pasting thin paper tape. Ta.

Furthermore, according to experiments conducted by the inventors, an embossing roll or an embossing plate having a plurality of small convex portions directly parallel to the surface of the decorative laminate to which the decorative sheet is attached and which has not been subjected to an undercoat. Even if multiple narrow groove recesses are press-fitted by pressing with As a result, the boundary between the narrow groove recess and the flat surface appears to be raised.

[Problems to be Solved by the Invention] This invention solves the above-mentioned problems related to the groove processing of conventional decorative laminates, and provides a decorative laminate pasted with a decorative sheet having narrow grooves and recesses that make the decorative laminate look beautiful and three-dimensional. The purpose of this invention is to provide a method for manufacturing the same.

[Means for Solving the Problems] In order to achieve the above object, the present invention applies a colored paint to the surface of a decorative board having a decorative sheet adhered to the top surface of the substrate, and then coats the surface of the decorative board. A decorative board characterized by applying a transparent or colored transparent top coat after forming a plurality of thin grooves by pressing with an embossing roll or an embossing plate having a plurality of parallel small convex parts. It pertains to the manufacturing method.

[Function] Hereinafter, the function of the present invention will be explained in detail with reference to the accompanying drawings.

FIG. 1 is an exemplary side schematic diagram illustrating steps for carrying out the method of the invention.

Reference numeral 1 denotes a decorative board, in which a veneer as a decorative sheet 2 is adhered on a substrate 3 in a line pattern with an adhesive. Note that the decorative sheet 2 is made of thin paper with a weight in the range of about 17 to 50 g/m ² or a synthetic resin film with a thickness of about 0.07 to 0.1 mm, and various wood grain patterns or abstract patterns are printed on the surface. You can use natural or artificial veneers of wood, zelkova, zelkova, cherry tree, oak, etc. with a thickness of about 0.2 to 1.0 mm. The thickness of the board 3 is
Refers to wooden substrates such as plywood, particle board, hardboard, MDF, etc., and inorganic substrates such as calcium silicate board, gypsum board, gypsum slag board, calcium carbonate board, asbestos fiber board, and glass fiber board, etc. with a thickness of approximately 2.0 to 12 mm. .

Adhesives for attaching the decorative sheet 2 to the substrate 3 include commonly used vinyl acetate resin emulsion type adhesives, EVA resin adhesives, urea resins, melamine resins, phenol resins, etc.
It is a rubber-based adhesive.

As shown in FIG. 1, the entire surface of the decorative board 1 is coated with a colored paint 4.

Colored paint 4 includes lacquer, polyurethane,
A commonly used colored opaque paint such as amino alkyd or polyester is applied by applying it smoothly using a commonly used roll coater or by rubbing it into the recesses of the decorative sheet using a sponge roll.
The coating amount of the colored paint 4 is about 20 to 50 g/m ² .

Then, after drying the undercoated decorative board 1, the surface of the decorative board 1 is pressed with an embossing roll 7 having a plurality of parallel small protrusions 6 as shown in FIG. A groove recess 8 is press-fitted into the surface of the decorative board 1.

Note that the narrow groove recessed portion 8 may be formed using an embossing plate.

The shape of the embossing roll 7 is as shown in Fig. 2.
Roll 7 has a height of about 0.5 to 2.0 mm and an opening angle of about 60 mm.
A V-shaped convex portion 4 with an angle of about 120 degrees is used, and the thickness is about 100 to 70 degrees of the thickness of the decorative board 1.
It is preferable to apply a pressing force that is sufficient to pass between the embossing roll 7 and the feed roll 9, which are set at an interval of 50%, since the decorative sheet 2 will not be torn and the three-dimensional appearance of the decorative surface will be emphasized.

Furthermore, if the small convex portions 6 of the embossing roll 7 are subjected to various mesh processing, the molded fine groove concave portions 8
Minute irregularities are formed in the grooves, and the irregularities diffusely reflect light to create a matte state inside the narrow groove recesses 8, and together with the undercoating colored paint 4, the depth of the narrow groove recesses 8 is further emphasized.

Furthermore, the embossing roll 7 and the small convex portions 6 of the embossing board
If you make it possible to heat it to around 150-500℃,
This is preferable because the surfaces of the decorative sheet 2 and the substrate 1 are plasticized, making it easier to form the narrow grooves 8.

Next, after narrow grooves 8 are formed on the surface of the decorative board 1, a transparent paint is applied as a top coat 10 to the entire surface.
As with the undercoat, the top coat 10 may be a transparent paint such as lacquer, polyurethane, aminoalkyd, polyester, etc., or may be colored and transparent by adding a dye or a transparent pigment to the paint.

The coating amount may be about 30 to 100 g/m ² .

The decorative board manufactured through the above process is the third
It will look like the figure.

[Example] Next, examples of this invention will be described.

A 12 mm thick, 30.3 cm wide, 180 cm long plywood surface is covered with a 0.3 mm thick veneer veneer pasted onto a brickwork pattern.The entire surface of the decorative board is coated with blackish brown paint based on 13 parts by weight of amino alkyd resin transparent paint. After adding 7 parts by weight of the pigment and diluting it with 80 parts by weight of a solvent, use a sponge roll to apply the coloring agent, and then use a stay roll to slide the coloring agent on the flat part into the channel concavity of the veneer and flatten it at the same time. Scrape off the colorant from the area to emphasize the wood grain pattern, then insert it into the dryer and dry at 50~60℃ for 5~
Dry for about 10 minutes.

Next, a metal embossing roll having a small convex part that matches the joint part of the veneer veneer is used to press the veneer veneer to form a thin groove with a width of 1 mm and a depth of 0.5 mm. Apply 80g/ ^m2 of transparent amino alkyd resin paint to the entire surface using a flow coater.
It was applied to a certain degree and then dried in a dryer to obtain a decorative board in which the wood grain pattern and narrow grooves were beautifully emphasized over the entire surface of the decorative board.

[Effects of the Invention] Since the decorative board of the present invention is manufactured by the method described above, it cannot be used in cases where the material of the core board or core layer is coarse, such as plywood or particle board, or where substrates of different colors are used. Since narrow grooves are formed on the surface of the veneered decorative board so that the surface is covered with the veneer and pushed into the board, the core board and core layer chips are not exposed on the surface of the decorative board, and the fuzz inside the grooves is eliminated. It is possible to manufacture beautiful veneered decorative boards with no difference in color or difference in color.

After the surface of the decorative board is coated with colored paint, the narrow grooves are formed, so the boundary between the flat part of the decorative board and the recesses does not shine, creating beautiful narrow grooves with rich three-dimensional spaces. In addition, there is no need to perform groove coating on the narrow groove recesses as in the conventional method, and the manufacturing process can be simplified.

By using the method of the present invention, fine grooves can be formed even on thin decorative boards with a thickness of less than 3 mm, which could not be processed with fine grooves in the past.

It has the following effects.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing an exemplary process for carrying out the method of the present invention, and FIG. 2 is a cross-sectional view showing a state in which narrow grooves are formed using an embossing roll. FIG. 3 is a sectional view showing a decorative board according to an embodiment of the present invention. 1... Decorative board, 2... Decorative sheet, 3... Substrate, 4... Colored undercoat, 5... Painting device, 6
...Small convex portion of embossing roll, 7... Embossing roll, 8... Narrow groove recess, 9... Feeding roll, 10...
...Top coat paint, 11...Drying device.

Claims (1)

[Claims] 1. After undercoating the surface of the decorative board with the decorative sheet adhered to the upper surface of the substrate with a colored paint, the surface of the decorative board is then pressed with an embossing roll or embossing board having a plurality of parallel small convex portions. A method for producing a decorative board, which comprises press-fitting a plurality of narrow grooves and then applying a transparent or colored transparent top coat.