JPH03193164A - Coating of woody material - Google Patents

Abstract

PURPOSE:To contrive the simplification of coating process and prevent a reduction in the thickness of coating film with the passage of time after completion of the coating by a method wherein a veneer is precoated and specular gloss coating is applied to a substrate after bonding the attaching plate thereto. CONSTITUTION:A veneer 1 is precoated to form a coating film 7. After bonding the veneer 1 to a substrate 8, a specular gloss coating is applied thereto. As a result, this method permits the simplification of the coating process and the prevention of a reduction in the thickness of the coating film with the passage of time after completion of the coating.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method for coating wood materials.

More specifically, the present invention relates to a mirror coating method for wood materials that simplifies the coating process and prevents thinning of the coating film due to changes over time.

(Prior Art) Wooden materials coated with a mirror finish have been used as interior materials for buildings and the like, and a number of various ideas have been devised to achieve the mirror finish.

Usually, in mirror painting of wood materials, for example, wood grain mirror painting, as shown in Figure 2, an untreated board (artificial or natural) (A) is attached to the base material (B). Afterwards, it was painted (1) and clear coated (1), and polished and puffed to form a mirror surface (E).

(Problem to be solved by the invention) However, in such a conventional mirror painting method, since the untreated plate (A) is painted after being pasted on the base material (B), there are problems such as blurring and pin spots. In the case of boards with many structural defects such as holes, especially in the case of artificial wood boards, the paint may be absorbed into the board significantly, making it necessary to paint over and over again, leading to an increase in the number of coats. The drawback was that the paint film was noticeably thinned due to changes over time after painting was completed.

For this reason, there is a limit to productivity improvement, and it has been difficult to maintain product quality.

This invention was made in view of the above-mentioned circumstances, and it is possible to improve the drawbacks of the conventional mirror painting method for wood materials, simplify the painting process, and reduce the change over time after painting. The purpose is to provide a new coating method that can prevent thinning of the paint film due to

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a method for painting wood materials, which is characterized by pre-painting a board, applying a light coating to a base material, and then applying a mirror finish. provide.

In addition, in the above method, the present invention also provides preliminary coating by attaching the attached plate to the base plate and/or pasting the attached plate to paper or a sheet, and the use of ultraviolet curable (UV) paint as the paint for preliminary coating. ) The preferred embodiment is to use paint.

(Function) In the method of the present invention, unlike the conventional method, an untreated plate is not directly pasted to the base material and painted, but the plate is pre-coated and then applied to the base material. This simplifies the entire painting process, suppresses the suction of paint into the panel, and reduces the number of times of painting.

As a result, productivity is greatly improved.

In addition, since sufficient curing is possible with this preliminary coating, it is possible to suppress changes in the wood material and the coating film due to changes over time after the coating is completed, and to prevent thinning of the coating film.

(Example) Hereinafter, the coating method of the present invention will be explained in more detail with reference to the drawings.

FIG. 1 shows an example of a step in the coating method of the present invention. For example, as shown in FIG. 1, (a) A preliminary coating is applied to a board (1) made of artificial wood or natural wood.

In this case, for example, a board with a thickness of about 0.2 to several inches (1
) is pasted on the base plate (3) with or without paper or sheet-like material (2). At this time, the attachment plate (1) is pasted on the base plate (3) through paper or sheet form, specifically Japanese paper, etc., and then hand-layed or coated roll (4), doctor roll (5), backup roll (6 ), etc. The coating is applied using a roll coating device.

The presence of Japanese paper or the like makes it easier to handle the attached plate (1) and is useful for preventing cracking when it is attached to the next base material.

By applying such preliminary coating to the attached plate (1), the number of times of coating required in conventional coating after pasting to the base material can be reduced, and the coating process can be simplified.

In addition, since sufficient curing is possible, thinning of the coating film after mirror painting can be prevented.

Defects such as sunken edges and pinholes on the mounting board (1) can also be effectively treated by this preliminary coating. A coating (7) is formed.

(b) Next, the plate (1) is peeled off from the base plate (3) and pasted onto a base material (8), such as medium density fiberboard (MDF), using an adhesive. Of course, there is no particular limitation on the type of base material (8).

In this state, regular mirror painting is applied.

For example, mirror painting can be applied as the next step.

(c) The surface of the coating film (7) formed by preliminary coating is colored and coated to a predetermined color tone that matches the intended use of the wood material.

A colored coating film (9) is formed using a paint containing a coloring agent such as a dye or pigment, such as a urethane paint.

Needless to say, there are no particular restrictions on the paint or coating method.

(d) Clear coating film (10
) to form. Forms a coating film (10) that is hard and has excellent wear resistance and weather resistance.

Polyester paints are particularly suitable.

(e) Furthermore, polishing with a level sander etc.
Apply a puff finish.

In such a painting process, it is also effective to use an ultraviolet curable (UV) paint for the preliminary coating of the mounting board (1).By applying this UV paint, it is more effective to shorten the drying time and reduce the number of times of painting. It can be made into something.

Of course, the invention is not limited to the above examples. Various specific aspects are possible for detailed processes, including mirror painting.

(Effects of the Invention) According to the present invention, as explained in detail above, l) the painting process can be simplified;

It is possible to prevent paint from being sucked into the plated plate, and it is possible to reduce the number of times of painting and improve productivity, for example by reducing the number of times of clear painting from three times to one or two times in the past.

2) It is possible to prevent thinning of the paint film due to changes over time after painting is completed.

Since the pre-painted state can be sufficiently cured, changes in the wood material, paint film, etc. after painting is completed can be minimized.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view illustrating the process of this invention. FIG. 2 is a process perspective view showing a conventional method. 1...Tsuki board 2...Paper/sheet-like material 3...stand board 4...Coating roll 5...Doctor roll 6...Backup roll

Claims (4)

[Claims] (1) A method for painting wood materials, which is characterized by pre-painting a board, pasting it on a base material, and then painting it to a mirror finish. (2) Claim (1) in which the attached plate is attached to the base plate and pre-painted.
) Painting method described. (3) The coating method according to claim (1) or (2), wherein the preliminarily coated plate is pasted onto paper or a sheet. (4) Claim (1) of preliminary coating with ultraviolet curable paint
) Painting method described.