JPS61271066A - Method for coating wooden plate - Google Patents

Abstract

PURPOSE:To obtain a beautiful wooden plate without pinholes, etc., by sticking tissue paper on the surface of a sended wooden plate with a transparent adhesive, applying a highly transparent paint thereon and transparentizing the tissue paper. CONSTITUTION:When natural grain patterns and wooden feeling are provided to a wooden plate, the surface of the wooden plate is firstly sanded and smoothed, then tissue paper is stuck on the surface by using a highly transparent adhesive such as an acrylic emulsion, the adhesive is infiltrated into the lower layer part of the tissue paper and the plate is sufficiently dried. A highly transparent paint is successively coated on the surface, the paint is infiltrated into the upper layer part of the tissue paper to transparentize the tissue paper and the upper surface of the tissue paper is coated with the paint layer. Consequently, the coated film is not damaged by the resin oozing out from the inside of a wooden material and a beautiful wooden plate without any pinholes and cells and having wooden feeling is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of painting a wood board, such as a veneer or decorative plywood, which beautifully expresses the natural wood grain pattern and wood texture of the board.

(Conventional technology) Currently, veneer and veneer decorative plywood are widely used as building materials and furniture boards because they emphasize the beauty of natural wood. A commonly used painting method is to apply a wiping colored paint or not, then apply a highly transparent paint, such as an acrylic urethane clear resin, to the surface of the button, and express wood grain patterns etc. through this transparent paint layer. However, when painting a wooden board with oil seeping out on the surface, the hardening of the paint in that area may increase (l) depending on the paint that has not hardened in that area. A sinking phenomenon compared to other parts (!!!
Therefore, in the former case, the boards cannot be stacked, making it impossible to keep them as a souvenir from the factory, and in the latter case, the paint in the sink areas may lose its beauty and cause uneven coating. there were.

Also, if fat oozes out from inside the wood after painting, there is a risk that tiny particles will leak into the paint in that area.

In order to prevent paint deterioration or uneven coating due to the leakage of fat, general furniture manufacturing factories apply anti-grease sheets (pure urethane resin) to the surface of wooden boards, and then However, since the oil-proof sheets in this case require 4 to 5 hours to dry, this coating method is inappropriate for factories that mass produce wood boards.

The surface of the wood board has large and small irregularities, and even if you apply a wiping coating or sanding thoroughly, a completely smooth surface cannot be obtained, and the coating film causes pinholes. However, bubbles were sometimes generated.

(Problems to be Solved by the Invention) The present invention uses such a conventional painting method that directly expresses the wood grain pattern, so that the 'm1s is not attacked by the fat seeping from inside the wood board, and pinholes and The purpose is to provide a beautiful wood board that does not have the appearance of air bubbles and impair its wood feel.

(Means for solving gate opening) In order to achieve the above object, the present invention applies wiping coating to the surface of a wooden board or sands it to make the surface as smooth as possible. Attach tissue paper to the surface using a highly transparent adhesive. This thin paper uses special paper that becomes transparent with adhesive or ffam paint. Further, the adhesive is applied in a semi-dry state so that the adhesive permeates only the lower layer of the thin paper. After this is dried, a highly transparent paint is applied to the surface of the thin paper, and a portion of this paint is allowed to seep into the parts of the thin paper where the adhesive has not permeated, making the entire attached paper transparent. It is.

(Function) With wood boards painted in this way, the adhesive and paint seep through the thin paper, and the natural wood grain pattern of the wood board is expressed. This prevents the lubricant from leaking into the paint, thereby preventing deterioration of the paint. Furthermore, the formation of bottle holes and air bubbles can be prevented by pasting the thin paper.

(5j! Example) Next, an example of the method for coating a wooden board according to the present invention will be described.

A veneer decorative plywood using naph veneer was used as a wood board, and it was sanded with a wide belt sander of 320 to 600 rows for 2 to 3 [NI sanding], and then coated with alcohol, V-based S color paint, reverse coater, roll coater. - Apply colored paint or wiping coating at a coating amount of 10 to 20 f/go using a coating machine such as a wiping machine. After drying "320"
-800 Wide Peel A/) Sand 2 to 3 times with a sander, leaving the paint in the recesses on the surface, and remove the paint on the entire surface so as not to spoil the appearance. Apply a highly transparent acrylic emulsion (aqueous) adhesive to the smooth surface using a reverse coater at a coating amount of 55±25 f/ld, and cut at a temperature of 120 to 150°C. ±10
Semi-dry at a speed of m7', then heat the special thin paper (also known as transparent paper) of 1c14fβ. Fuminate at 120-150°C using pressure cuffs - 10 or more pressure rolls, and dry thoroughly until the moisture content becomes 12% or less. Next, this surface base coating, intermediate coating, and finishing coating are sequentially applied. For base coating, a colored or non-colored acrylic urethane resin is applied at a coating amount of 20±10 f/wl using a roll coater, and after setting for 1 to 2 minutes, it is heated to 10°C.
Force dry for 72-3 minutes. The intermediate coating equipment uses a roll coater, and acrylic urethane sanding sheets (2
Apply liquid at a coating rate of 90±20 f/g, set for 6 minutes, and force dry for 6 minutes. Repeat the above intermediate coating twice, increasing the total coating amount to 140~2001/
Let it be d. After drying, the back surface is sanded with a wide belt sander of 320-500 mm, and the final coating is applied.For the final coating, use a roll coater or sprayer and apply acrylic urethane clear (2-component type or 1-component type) at 45 mm. ±201/go(5
The coating was applied at a coating weight of ~65 f/a), 6 minutes of 7 minutes of coating, and 6 minutes of forced drying to complete the entire coating.

In some cases, the base coating is omitted and an intermediate coat and a finishing coat are applied on the thin paper.

(Effects) As described in detail above, the method of painting wooden boards according to the present invention can be applied even if grease is generated on the wooden board or after painting due to the use of special thin paper. In addition, since there is no need to apply an anti-grease sealer coating like in the past, forced drying can significantly shorten the coating time, and therefore the production line of plywood factories etc. It has the effect of being able to be painted. Also, by using thin paper, the surface of the wooden board becomes even smoother, and the formation of bubbles and bubbles can be prevented.

Furthermore, the permeation of the paint into the tissue paper has the characteristic that the coated surface is strengthened and cracks are less likely to occur.

Application agent: Hisashi Matsumoto

Claims (1)

[Claims] After sanding the surface of the wooden board, apply a thin paper using a highly transparent adhesive, allowing the adhesive to seep into the lower layer of the thin paper, and after drying thoroughly, apply a highly transparent adhesive to the surface. A method for painting a wood board, comprising applying a paint to the thin paper, making the thin paper transparent by penetrating the upper layer of the thin paper, and covering the upper surface of the thin paper with a paint layer.