JP2873111B2 - Coloring method of plate material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for coloring a plate material. More particularly, the present invention relates to a method for coloring a plate material which improves appearance quality, has no coloring unevenness, and can prevent thinning of a coating film due to aging.

[0002]

2. Description of the Related Art Conventionally, as a building interior material, a plate material which has been subjected to a colored coating or the like has been used, and various measures have been taken for the colored coating. Usually, in such a colored coating, as shown in FIG. 4, for example, an untreated plate (artificial or natural)
To a plate or the like that is attached to the base material (a) by a vacuum press or the like.
An undercoat sealer coating (c) and a sanding sealer coating (d) are applied, and after polishing, a colored coating (e) is applied.

[0003]

However, in the case of such a conventional colored coating method, since the untreated plate (a) is applied after being adhered to the substrate (a),
The paint has to be painted many times due to the inhalation of paint into tissue defects such as blemishes and pinholes, and the paint has to be painted many times due to the thinness. The coloring unevenness was caused, and even in one plate, the variation in coloring among the plate materials was large. In addition, there is a drawback that the thinning of the coating film due to a change with time after the completion of coating is inevitable. For this reason, it has been difficult to improve the quality of the colored plate material product by the conventional method. The present invention has been made in view of the above circumstances, improves the disadvantages of the conventional plate material coloring coating method, improves the appearance quality, has no coloring unevenness, and prevents the coating film from becoming thin. The purpose is to provide a new coloring method that can be used.

[0004]

In order to solve the above-mentioned problems, the present invention provides an undercoat sealer treatment for a sheet-like plate material, a UV sanding sealer coating to form a cured coating film, and then a coloring and surface coating. After that, a sheet-like plate material is attached to a base material, and further a finish coloring is performed.

[0005] The present invention also provides the above method,
It is preferable that the UV cured coating film is polished and subjected to a surface coating treatment after being colored and applied, and that the UV sanding sealer coating and the curing and drying treatments are repeated a plurality of times, and that the final coloring be so-called mirror-finished. Also as an aspect. Hereinafter, examples are shown along the drawings, and the coating method of the present invention will be described in more detail.

[0006]

FIG. 1 shows an example of one step of a coating method according to the present invention. For example, as shown in FIG. 1, in the case of colored coating of a board to which a board is attached, (a) first, a board (1) made of artificial wood or natural wood is used, and a backing sheet or the like is used. Place it on the base plate (2) with or without sticking. When a backing sheet is used, Japanese paper, nonwoven fabric and the like can be used, and in particular, Japanese paper of about 30 to 40 g / m ² can be suitably used.

At this time, the attachment plate (1) and the backing sheet can be integrated by flat plate pressing or the like, and the pressing conditions are a temperature of 90 to 100 ° C., a pressure of 7 to 10 kg / c.
m ² and the processing time can be about 2 to 3 minutes. As the adhesive, a vinyl acetate resin type, a urethane resin type, or the like can be used at a coating amount of about 5 to ²⁰ g / m ² . (B) Then, the surface of the obtained attached plate is subjected to an undercoat sealer treatment by a suitable means such as a roll coater coating device (3), a flow coater, a spray or the like, and then a UV sanding sealer (4) is applied.

By applying the undercoat sealer treatment and the UV sanding sealer (4) coating, the adhesion of the UV-cured film is improved, a uniform and smooth surface is formed, and the paint is sucked into the attached plate. It prevents thinning and enables uniform pattern expression, and also suppresses uneven coloring and changes with time of the coating film. The UV-cured coating film forming plate material as a semi-finished product can be stored as it is.

FIG. 2 shows this process in more detail as a process block diagram. As the undercoat sealer treatment, it is particularly preferable to use a urethane sealer treatment.
It is preferred to paint at a rate of ５5 g / m ² . After drying it, U is added, preferably at a rate of 5 to ²⁰ g / m ^2.
V sanding sealer (4) Paint.

As the UV sanding sealer (4), a polyester UV sanding sealer or the like can be suitably used. For the above-mentioned undercoat sealer treatment and UV sanding sealer (4) coating, the required treatment by means of a roll coater, hand spray, etc.
Although the coating can be performed, when a roll coater is used, a smooth surface can be more easily formed, which is effective in suppressing coloring unevenness.

As shown in FIG. 2, the UV sanding sealer (4) coating is preferably repeated a plurality of times as a series of processes for forming a cured coating film by a UV curing and drying treatment. More specifically, it is preferable to repeat it two or three times. By such a UV sanding sealer coating and the curing and drying treatment, a coating film having good surface smoothness is formed. With this coating film, the occurrence of uneven coloring in the colored coating is suppressed, and the final finishing of color matching is also made more efficient and easier. (C) Subsequent to the processes (a) and (b), as shown in FIG. 1, a colorant paint (5) is applied. Also in this case, the surface of the attached plate (1) is colored by a means such as a roll coater coating device (3).

For the colored coating, for example, a urethane paint having a predetermined color tone with a paint or the like is preferably used.
At this time, the coating amount is usually preferably about 3 to ²⁰ g / m ² . The colored coating preferably has a coloring degree of 50 to 80% of the final product plate. In addition, at the time of the colored coating, as shown in FIG. 2, it is desirable that the surface of the UV-cured coating film formed in the step (b) is polished in advance. For example, # 400, # 60
It is processed by a level sander of about 0, # 800 or the like, and / or polishing by a triple buff or the like.

In this colored coating, it is more effective to use a roll coater for coating. (D) On the surface of the colored attachment plate (1),
Apply a surface coat of clear paint (6). Also in this case, appropriate means such as a roll coater coating device (3) is employed.

For the clear coating at this time, urethane clear, polyclear, or the like can be used.
The coating amount can be 30 g / m ² . After the completion of the clear coating, drying is performed to obtain a required colored coated sheet-like plate. (E) As shown in FIG. 1, the sheet-like plate member made of the colored plate (1) and the like colored and coated as described above is then disposed and integrated with the base material (7) by a vacuum press.

The pressing conditions at this time are generally at a temperature of about 90 to 100 ° C., or in this case, an adhesive such as a vinyl acetate resin or a urethane resin is applied in an amount of 5 to 20%.
g / m ² . Also in this case, the adhesive strength is greatly improved by using an adhesive having excellent solvent resistance, such as urethane emulsion and aqueous vinyl urethane. The coating amount can be generally about 6 to 10 g / m ² .

In order to improve the adhesive strength between the attachment plate (1) and the base material (7), it is effective to further perform a flat plate press treatment. The pressing conditions at this time can be a temperature of 90 to 100 ° C., a pressure of 7 to 10 kg / m ² , and a time of about 2 to 3 minutes. Thereby, the adhesive strength is greatly improved. (F) Subsequently, the color finish is performed. This finish process can be performed, for example, according to the mirror finish procedure shown in FIG. That is, first, the surface of the attached plate (1) is colored by spray coating or the like. As the paint at this time, for example, an appropriate paint such as a urethane-based paint can be used.
%, More preferably about 20 to 30%.

Subsequently, clear coating is performed again. 10-50 g /
applying a coating of m ² ratio of about. The coated surface thus obtained is polished by, for example, a level sander of about # 400, # 600, # 800, etc., and further subjected to, for example, about five reciprocations by a triple buff.

In the method of the present invention as described above,
Sheet-like sheet material such as unprocessed attached plate as in the conventional method
It can be applied to sheet-like sheet material without directly applying it to the substrate and painting.
Primer sealer treatment, UV sanding sealer and
After applying colored coating and surface coating,
To absorb paint on sheet-like plate materials such as conventional
And control the movement of attached plates and coatings after painting.
It can be minimized, especially in the case of mirror finish.
It can effectively prevent uneven coloring and thinning of the film.
You. Because it is possible to cure well,
Prevents lightening of wood and coatings due to color unevenness and aging
You. In addition, the UV Sande
Forming a cured coating with a ring sealer, surface smoothness
Color unevenness and color variation are effective.
As a result, a high quality plate material can be obtained. In addition,
By using a solvent-resistant adhesive in the method described in
The adhesion to the substrate is greatly improved. <Example of painting> Plate with artificial precious wood, for example, 0.3mm thick
The water-based vinyl urethane adhesive through Japanese paper backing sheet
At the same time, they are integrated by flat plate pressing. When pressing a flat plate
Temperature is 95 ° C, pressure 8kg / m^Two, Pressurization time 2 minutes,
8 g / m of adhesive applied ^TwoAnd

Subsequently, on the surface of the obtained attached sheet,
An undercoat urethane sealer was applied at a coating amount of 4 g / m ² , and after drying, a polyester-based UV sanding sealer was applied twice so as to have a coating amount of 20 g / m ² . The obtained cured film was colored by applying a colorant-containing urethane paint at a rate of 5 g / m ² .
Further, after polishing with a level sander, urethane clear was applied at a coating amount of 20 g / m ² and dried.

The coloring at this time was adjusted to 80% of the finish. Next, the colored coated sheet board is
At a temperature of 98 ° C. and a pressure of 4 kg / m ² , the medium was vacuum-pressed on a medium-density fiberboard (MDF) having a thickness of 18 mm for 3 minutes and integrated.
At this time, aqueous vinyl urethane was applied at a coating amount of 6 g / m ² . After the completion of the vacuum press, the plate was further subjected to a flat plate press treatment at a temperature of 100 ° C. and a pressure of 7 kg / cm ² for 2 minutes.

Next, urethane coloring was applied so as to give a final coloring of 20%, and then polyclear coating. The obtained coated surface was polished with a # 400, # 600, and # 800 level sander, and subjected to five reciprocal buffs with a triple buff to form a mirror surface. The adhesive strength of the attached plate to the substrate was improved, there was no coloring unevenness, and the coating film was prevented from being thin.

For example, as described above, the coloring coating method of the present invention is excellent in the effect of improving the surface smoothness of a plate material and suppressing coloring unevenness, as described above. This is also clear from the comparison of coating shown in Table 1. That is, as shown in Table 1, as is clear from the comparison between the embodiment of the present invention, Comparative Example 1 in which a sanding sealer treatment other than the UV sanding sealer was performed, and Comparative Example 2 in which the sanding sealer treatment itself was not performed. In the method of the present invention, results far superior to those of the conventional method were obtained in the evaluation of surface smoothness and color variation.

[0023]

[Table 1]

[0024]

According to the present invention, as described in detail above, a coating process of a plate material in which coloring unevenness and unevenness are suppressed, the thinning of a coating film is suppressed, and final color matching is easy is realized. The quality of the obtained colored plate material is extremely good.

[Brief description of the drawings]

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

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

FIG. 3 is a block diagram showing a finish coloring step.

FIG. 4 is a process perspective view illustrating a conventional coating method.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 attached board 2 boards 3 roll coater coating equipment 4 UV sanding sealer 5 colorant paint 6 clear paint 7 base

Continuation of the front page (51) Int.Cl. ⁶ identification code FI B05D 5/06 B05D 5/06 BG 7/24 301 7/24 301T (58) Field surveyed (Int.Cl. ⁶ , DB name) B05D 1/00-7/26 B27D 5/00

Claims (6)

(57) [Claims] 1. An undercoat sealer treatment is applied to a sheet-like plate material, a cured coating film is formed by applying a UV sanding sealer, and then, after coloring and surface coating, the sheet-like plate material is attached to a base material and further subjected to finish coloring. Characteristic coloring method of plate material. 2. The method according to claim 1, wherein the UV-cured coating film is polished and colored and then subjected to a surface coating treatment. 3. The method of claim 1 or 2, wherein the UV sanding sealer coating and the curing and drying treatment are repeated a plurality of times. 4. The colored coating method according to claim 1, wherein the coating is performed by a roll coater. 5. The colored coating on the cured coating film has a coloring degree of 50 to 80% of the final product sheet material.
Coloring method for plate materials. 6. The method of claim 1, 2, 3, 4 or 5, wherein the finish coloring is a mirror finish such as coloring, clear coating, polishing and buffing.