JPH04349975A - Color coating of plate material - Google Patents

Abstract

PURPOSE:To eliminate color variations and irregularities, to prevent visible coat shrinkage and to make final color matching easy by applying an undercoat sealer to a plate material, then applying a UV sanding sealer to form a cured coat and coloring the coat. CONSTITUTION:An undercoat sealer is applied to a plate material 3 consisting of a face plate 1 and a base 2 using a roll coater 4, then a UV sanding sealer 5 is applied to form a cured coat. After that, a coloring agent paint 6 is applied and a clear paint 7 is applied. As a result, color variations and color irregularities are brought under control and also visible coat shrinkage is prevented. In addition, final color matching can be made easy.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a method for coloring plate materials. More specifically, the present invention relates to a method for coloring a plate material, which improves the appearance quality, eliminates uneven coloring, and prevents the paint film from fading due to changes over time.

0002

BACKGROUND OF THE INVENTION Conventionally, plate materials coated with colored coatings have been used as interior materials for buildings, and various improvements have been made to the colored coatings for this purpose. Normally, in such color painting, as shown in Figure 3 for the board pasted board material, an untreated board (artificial or natural) (A) is pasted onto the base material (B) using a vacuum press or the like, Undercoat sealer paint (C) and sanding sealer paint (D) have been applied, and after polishing, colored paint (E) has been applied.

0003

[Problems to be Solved by the Invention] However, in the case of such conventional colored coating methods, the paint may be sucked into tissue defects such as eye spots and pinholes, and the eyes may fade, so it is necessary to apply multiple coats. Also, because the surface smoothness of the board is insufficient, uneven coloring occurs after painting, and there is large variation in coloring even on a single board and between each board. It became. Furthermore, there is a drawback that the paint film inevitably fades due to changes over time after completion of painting. For this reason, it has been difficult to improve the quality of colored board products using conventional methods.

[0004] This invention was made in view of the above circumstances, and aims to improve the shortcomings of the conventional board coloring method, improve the appearance quality, eliminate uneven coloring, and reduce the appearance of the paint film. The purpose of the present invention is to provide a new coloring coating method that can also prevent this.

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention is characterized in that a plate material is treated with an undercoat sealer, coated with a UV sanding sealer to form a cured film, and then colored. To provide a method for coloring and painting board materials. In addition, in the above method, the present invention provides preferable embodiments such as performing surface coating treatment after polishing and coloring the UV cured coating film, and repeating UV sanding sealer coating and curing drying treatment multiple times. There are some too.

[0006] Hereinafter, the coating method of the present invention will be explained in more detail by showing examples along with the drawings.

[0007]

EXAMPLE FIG. 1 shows an example of one step of the coating method of the present invention. For example, FIG. 1 shows the colored coating of a plate material to which a veneer is attached. In the case of this coating,
(a) First, a board (1) made of artificial wood or natural wood is placed on a base plate or base material (2) via a backing sheet or the like. When using a backing sheet, Japanese paper, nonwoven fabric, etc. can be used, especially 30~
Japanese paper having a weight of about 40 g/m2 can be suitably used.

[0008] At this time, the mounting plate (1) and the backing sheet can be integrated by flat plate pressing, etc., and the pressing conditions are a temperature of 90 to 100°C and a pressure of 7 to 10°C.
kg/cm2, and the processing time can be about 2 to 3 minutes. As the adhesive, a vinyl acetate resin type, urethane resin type, etc. can be used in a coating amount of about 5 to 20 g/m2.

[0009] The attached plate (1) provided with the backing sheet etc. can then be placed and integrated with the base plate or base material (2) by vacuum pressing. The pressing conditions at this time are generally a temperature of 90 to 100°C, and at that time, an adhesive such as vinyl acetate resin or urethane resin is used at a coating amount of about 5 to 20 g/m2. be able to.

In this case, the adhesive strength can be greatly improved by using an adhesive having excellent solvent resistance such as urethane emulsion or water-based vinyl urethane. The amount of application is generally 6~
It can be set to 10g/m2. (b) Next, the surface of the plate material (3) consisting of the obtained plate (1) and base plate or base material (2) is coated with appropriate means such as a roll coater coating device (4), a flow coater, or a sprayer. An undercoat sealer treatment is applied by using UV sanding sealer (5).

[0011] By applying this undercoat sealer treatment and UV sanding sealer (5) painting, a uniform and smooth surface of the UV cured film is formed, preventing the paint from being absorbed into the plate, preventing the eyes from fading, and creating a uniform pattern expression. It also prevents uneven coloring and changes in the paint film over time. The UV-cured coating film-forming board material as a semi-finished product can also be stored as is.

[0012] A support plate may be used during the undercoat sealer treatment and the UV sanding sealer (5) application. Further, FIG. 2 shows this process in more detail as a process block diagram. As an undercoat sealer treatment,
In particular, it is preferable to treat with a urethane sealer.
Preferably, the coating is applied at a rate of g/m2. After drying this, preferably at a rate of 5 to 20 g/m2,
Apply V-sanding sealer paint.

As the UV sanding sealer, a polyester UV sanding sealer or the like can be suitably used. For the above-mentioned undercoat sealer treatment and UV sanding sealer painting, the necessary treatment and painting can be performed by means such as a roll coater or hand spray, but when using a roll coater, it is easier to form a smooth surface. This is effective in suppressing uneven coloring.

Furthermore, as shown in FIG. 2, it is preferable that the application of the UV sanding sealer (5) be repeated multiple times as a series of processes including the formation of a cured coating film by UV curing and drying treatment. More specifically, it is preferable to repeat the process 2 to 3 times. A coating film with good surface smoothness is formed by such UV sanding sealer coating and its curing and drying treatment. This coating suppresses the thinning of the coating and the unevenness of coloring in the colored coating, and also makes the final finishing process of color matching more efficient and easier. (c) Following the treatments in (a) and (b) above, a colorant paint (6) is applied as shown in FIG. In this case as well, the roll coater coating device (4) is applied to the surface of the board (3).
) or other means.

[0015] For the colored coating, for example, a urethane-based paint that has a predetermined color tone is preferably used. The amount of coating at this time is usually preferably about 3 to 20 g/m2. Furthermore, when applying colored coating, as shown in FIG. 2, it is desirable to previously polish the surface of the UV-cured coating film formed in step (b). For example, the surface is treated with a level sander of about #400, #600, or #800, and/or by polishing with a triple buff.

[0016] Also in this color coating, it is more effective to use a roll coater. (d) The surface of the colored board (3) is then coated with
Apply clear paint (7). Also in this case, appropriate means such as a roll coater coating device (4) are employed.

[0017] For the clear coating at this time, urethane clear, polyclear, etc. can be used. For example, when using a urethane-based clear paint, it is usually
The coating amount can be 30 g/m2. After this clear coating is completed, it is dried to obtain the required colored painted board material. For example, the colored coating method of the present invention, which consists of the above steps (a), (b), (c), and (d), has the effect of improving the surface smoothness of the board material and suppressing uneven coloring, as described above. This is also clear from the coating comparison results shown in Table 1.

That is, as shown in Table 1, it is clear from the comparison between the examples of the present invention, Comparative Example 1 which was treated with a sanding sealer other than UV sanding sealer, and Comparative Example 2 which was not subjected to sanding sealer treatment itself. In the method of this invention, surface smoothness,
Furthermore, much better results than conventional methods were obtained in evaluating color variation.

[0019]

[Table 1]

[0020]

[Effects of the Invention] As explained in detail above, the present invention realizes a coating process for plate materials that suppresses coloring unevenness and variation, suppresses fading of the coating film, and facilitates final color matching. The quality of the obtained colored plate material is extremely good.

[Brief explanation of drawings]

FIG. 1 is a process sectional view illustrating the method of the present invention.

FIG. 2 is a block diagram illustrating the undercoat sealer treatment and UV sanding sealer coating process of the present invention.

FIG. 3 is a process perspective view illustrating a conventional painting method.

[Explanation of symbols]

１　　　　　board 2 Base plate or base material 3 Plate material 4 Roll coater painting equipment 5 UV sanding sealer 6 Colorant paint 7 Clear paint

Claims (5)

[Claims] [Claim 1] The plate material is treated with an undercoat sealer, and the U
A method for coloring board materials, which comprises applying a V-sanding sealer to form a cured film, and then coloring the material. 2. The method for coloring a plate material according to claim 1, wherein a surface coating treatment is performed after the UV-cured coating film is polished and colored. 3. The method for coloring a plate material according to claim 1 or 2, wherein the UV sanding sealer coating and the curing and drying treatment are repeated multiple times. 4. The coloring coating method according to claim 1, 2 or 3, wherein the coating treatment is carried out using a roll coater. 5. The method of coloring and coating a board material according to claim 1, 2, 3 or 4, wherein the coloring method is applied to a sheet material such as a board or a board material in which such sheet material is attached to a base material.