JPH06285424A - Method for coating wood surface - Google Patents

Abstract

PURPOSE:To obtain a method for coating a wood surface on which any fine pattern can easily and positively be formed on an industrial scale by forming a curable resin layer on part of the wood surface, coating the wood surface where the curable resin layer is formed, and separating the curable resin layer after coating to coat the wood surface. CONSTITUTION:First a relief printing 18 which forms a curable resin layer showing a pattern or a figure is formed on part of the surface of a wood 10 as a method for coating the wood surface. Next, a coating material is spread on the wood surface of the projecting surface side of the relief printing 18 to form a coated layer 20. Further, the curable resin layer 12 is separated, so that a pattern or a figure shown by the curable resin layer 12 is reflected on the non-coated part 22 (recessed part) of the wood surface S. After this produced, the non-coated part 22 is filled with a prepared undercoat adjustment agent, and at the same time, an undercoat adjustment agent layer 24 is formed on the coated layer 20. Further additionally, a finish coating is applied to form a finish coat layer 26 and thus the wood surface S is coated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a painting method for decorating and beautifying wood surfaces such as wooden furniture and wooden structures. More specifically, it is possible to easily and surely apply a fine decorative painting on a wood surface on an industrial scale. A coating method that can be applied.

[0002]

2. Description of the Related Art Wood has long been used as a material for various articles including furniture such as chests of drawers, dining tables, cupboards, desks, and wooden structures.

[0003] The surface of this wood is widely coated for the purpose of protecting the wood from the influence of the outside world such as sunlight and air, giving a beautiful appearance by coloring and gloss, and preventing insects.

Here, the coating means spreading the paint on the surface of the object, and the paint is fluid at room temperature and solidifies and adheres to the surface of the object by spreading it on the surface of the object and drying it. To form a coating film, including powder coatings.

[0005] The painting of the surface of this wood, brush, roller,
It is performed by various coating methods such as electrostatic coating, air spray, roll coater, and dip coating.

In these coating methods, in order to decorate and beautify the surface of wood, the following pretreatment steps and means have been adopted.

That is, in order to effectively utilize the grain of the wood surface for beautification, sand particles are blown with a jet of compressed air or steam (sand blast) to float the hard portion of the wood surface (floating structure). ) Was performed as a pretreatment.

This floating structure utilizes the property that the part of the wood grain formed in summer (Natsume) is soft and easy to grind, whereas the part formed in winter (Winter eye) is hard and difficult to grind. That is, the winter eyes stand out and the wood grain looks beautiful.

Further, engraving a wood surface to form a relief pattern is also widely performed as a pretreatment.

It is also widely practiced to use a plurality of paints containing different coloring pigments to express a pattern such as color coding and gradation on the surface of wood so as to draw a picture.

[0011]

However, the decoration and beautification of the wood surface in the above-mentioned conventional coating method has various problems as described below.

That is, in the floating technique by sandblasting, the patterns of the summer and winter patterns appearing on the untreated wood surface are inevitably reflected in the floated grain pattern, so only the grain pattern is available. There was a problem that it could not be expressed, and essentially any arbitrary grain pattern or other pattern could not be expressed.

In the engraving method, the engraving and engraving directions are limited by the properties of the wood itself, such as the thickness of the wood, the grain direction and hardness, and the manual work requires labor and time and is uniform. There is a problem that it is difficult to mass-produce wooden products with a simple relief pattern, and it is difficult to express a complicated and fine pattern in the case of machine engraving.

Further, in the case where decoration or beautification is performed by a sandblasting floating technique or engraving, when the wood grain pattern or the relief pattern formed on the wood surface becomes tired and it is desired to change the pattern, the surface is made thin. There is a problem in that it is not easy to change to a completely different pattern because it is often difficult to scrape the surface further depending on the thickness of the wood, even if the pattern is shaved, and the grain pattern does not change much.

Further, in the method of using a plurality of paints containing different color pigments, a fine pattern can be expressed by using a brush or a brush, but since it is a fine manual work, labor, concentration and time are required. However, there is a problem in that it is difficult to mass-produce uniform-patterned wood products.

The present invention has been made in view of the above circumstances, and provides a method for coating a wood surface, which can easily and reliably apply an arbitrary fine pattern on an industrial scale.

[0017]

In order to solve the above problems, the present invention provides a step of forming a cured resin layer on a part of the surface of wood and a step of coating the surface of the wood on which the cured resin layer is formed. And a step of peeling off the cured resin layer after the coating, the method further comprising coating the surface of the wooden material.

Further, the present invention provides the step of forming a cured resin layer on a part of the surface of wood in the above-mentioned method for coating a surface of wood, in which a photocurable resin layer formed on the surface of the base film is subjected to a negative film. After irradiating light to cure the photocurable resin in the exposed portion, the base film is attached to the wood surface, and a hard resin layer is formed by colliding the hard particles with the base film. This solves the above-mentioned problems.

Further, according to the present invention, a glass plate, a negative film, a cover film, a photocurable resin and a base film are laminated in this order, and light is irradiated from the glass plate side to obtain an image of the negative film. Form a mask film by exposing the photocurable resin to light to cure the photocurable resin in the exposed area and then peeling the cover film from the negative film while the photocurable resin layer and the base film are laminated. And the mask film is attached to the wood surface from the base film side, the cover film is peeled off and the metal particles are collided with the exposed photocurable resin layer to expose the uncured resin portion to the underlying base film. And a step of forming a cured resin layer on the surface of the wood by desorbing it,
After coating the wood surface on which the cured resin layer is formed, the cured resin layer peeling step of peeling the cured resin layer together with the underlying base film, and a wood surface coating method characterized by coating the wood surface from The above problems are solved by providing them.

[0020]

In the coating method of the wood surface according to the present invention,
Since a cured resin layer is formed on part of the surface of wood,
During coating, the paint does not adhere to the surface of the wood on which the cured resin layer is formed, and the paint adheres only to the surface of the wood on which the cured resin layer is not formed.

The photocurable resin layer formed on the surface of the base film is irradiated with light in accordance with the image formed on the negative film, and only the exposed portion is cured, and the image on the negative film is reversed in black and white. A positive image is formed on the base film by the cured resin portion and the uncured portion.

Next, when the hard particles collide with the photocurable resin layer on the base film attached to the surface of the wood, the resin which has not been exposed and remains uncured and the base film of the lower layer are separated from the surface of the wood. The exposed and cured portion and the underlying base film remain on the wood surface and a cured resin layer is formed on the wood surface.

The base film prevents the cured resin and the surface of the wood from adhering and fixing, and facilitates the peeling of the cured resin layer from the surface of the wood.

The glass plate supports a soft negative film,
The cover film prevents the negative film and the photocurable resin layer from adhering to each other during light irradiation and prevents damage and stains on the negative film.

Further, the cover film facilitates peeling from the negative film after light irradiation, and protects the positive type image formed on the base film from damage due to an unexpected impact during movement or transportation. .

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a wood surface coating method according to the present invention will be described in more detail with reference to the drawings.

FIG. 1 is a manufacturing process drawing of a mask film used in the wood surface coating method according to the present invention, FIG. 2 is a process drawing showing an embodiment of the wood surface coating method according to the present invention, and FIG. ) Is a side view during light irradiation in the mask film manufacturing process, FIG. 3B is a side view after light irradiation in the same process, and FIG. 4A is a process of attaching the mask film to the wood surface. A side view, FIG. 4B is a side view of a process of colliding the metal particles with the exposed photocurable resin layer by peeling off the cover film, and FIG. 5A is a metal particle on the photocurable resin layer. FIG. 5B is a side view after the step of hitting the body, FIG. 5B is a side view after the coating step of the wood surface on which the cured resin layer is formed, and FIG. 6A is a base film below the cured resin layer. 6B is a side view after the step of peeling with, and FIG. Side view after processing a modifier,
FIG. 6C is a side view after the top coat is applied after the same process.

The essential part of the present invention is to form a cured resin layer 12 on a part of the surface S of the wood 10, and to coat the surface S of the wood on which the cured resin layer 12 is formed.
The step of peeling off the cured resin layer 12 after the coating is to coat the wood surface.

That is, as shown in FIG. 5 (a), first, a cured resin layer 12 expressing patterns, figures, etc. is formed on a part of the surface S of the wood 10 to form a relief plate 18, then Figure 5
As shown in (b) of FIG.
A coating layer 20 is formed by spreading the paint on the surface of the wood, and as shown in FIG. 6 (a), the cured resin layer 12 is peeled off so that the pattern / figure represented by the cured resin layer 12 is formed on the wood surface. It is reflected in the non-coating portion 22 (concave portion) of S, and thereafter, as shown in FIG. 6B, the undercoating agent is treated to fill the non-coating portion 22 (concave portion) and the coating film. A base conditioner layer 24 is formed on the layer 20, and as shown in FIG. 6C, a top coat is applied to form a top coat layer 26.
By forming the, the surface S of wood is coated.

The wood 10 used here is softwood (pine, cedar, cypress, etc.), hardwood (buna, zelkova, duck, etc.).
It is a broad concept that includes wood such as oriental timber (teak, lauan, mahogany, etc.) and processed materials such as fiber boards (fiber board, particle board, etc.) that mainly use these plant fibers. The material may be a material or a perforated material, and the shape thereof may be plate-like (may be grained or plate-like) or rod-like, and may be plywood or veneer.

The curable resin forming the curable resin layer 12 may be any resin having a strength such that the shape, pattern and the like are not destroyed during coating, and may be a thermoplastic resin as well as a photocurable resin or a thermosetting resin. Also, any material having a certain strength near room temperature may be used.

Further, the cured resin layer 12 is formed on the wood surface S.
It is desirable to form it through a material (base film 14) having a weak adhesive force with the wood surface S so that it can be easily peeled off.

An example in which the cured resin layer 12 is formed on a part of the wood surface using a photocurable resin will be described below with reference to the process charts of FIGS. 1 and 2.

In this forming step, the photocurable resin layer 32 formed on the surface of the base film 30 is irradiated with light through the negative film 34 to cure the photocurable resin in the exposed portion, and then,
It is a step of adhering the base film 30 to the wood surface S and causing the hard particles 36 to collide with the base film 30 to form the cured resin layer 12.

This process will be described in detail. First, referring to FIG.
(A), a glass plate 38, a negative film 34, a cover film 33, a photocurable resin 32,
The base film and the base film are sequentially laminated.

The glass plate 38 may be made of any light-transmissive material, and for example, transparent glass, quartz glass, Pyrex or the like can be used. As an alternative to the glass plate 38, a light-transmissive polymer material such as methacrylic acid-based material can be used. It is also possible to use transparent glass and the like.

The negative film 34 is printed with a negative image corresponding to the pattern, figure, etc. expressed on the surface S of wood, and is laminated with a light-transmitting polymer such as polyester.

In FIGS. 3A and 3B, the black-painted portion of the negative film 34 is the light non-transmissive portion 34a, and the non-colored portion is the light transmissive portion 34b.

A vaseline layer 35 can be provided between the negative film 34 and the glass plate 38 to prevent displacement of the negative film 34 and facilitate peeling after irradiation with light.

The cover film 33 may be any light-transmissive material, and for example, a polymer material such as polyester, polyethylene, or polyvinylidene chloride, which can be easily formed into a film, can be used.

The base film 30 may be any material capable of forming a film such as cellophane or polyethylene.
Preferably, the material is a light-transmissive material, and as will be described later, the adhesive force with the wood surface S is such that displacement does not occur at the time of collision of the metal particles, and the portion where the metal particles 46 collide is desorbed. The cured resin layer 12 is easily peeled off.

The photocurable resin 32 includes a photosensitive resin which is hardened and insolubilized by light, and a photosensitive resin which is changed from a liquid to a solid by light, and is made of, for example, a cellulosic polymer, polyvinyl alcohol, nylon or the like. A mixture of a photopolymerization initiator and a polyfunctional acrylate monomer using molecules as a binder (composition example 1), or a liquid resin such as an unsaturated polyester or an acrylate oligomer mixed with a photopolymerization initiator (composition example 2) Is used.

An example of the composition is shown below.

Composition Example 1 Hydroxyethyl methacrylate 100 parts by weight Ethylene glycol dimethacrylate 5 parts by weight Polyvinyl alcohol (saponification degree 80 to 90%, molecular weight 400 to 600) 100 parts by weight benzoin isopropyl ether 3 parts by weight p-methoxyphenol 0. 3 parts by weight Blue dye 5 parts by weight Composition Example 2 Copolymer of adipic acid: fumaric acid: polyethylene glycol (molecular weight 500 to 600) = 0.5: 0.5: 1 100 parts by weight Acrylic acid 20 parts by weight Acrylamide 35 parts by weight Parts benzoin methyl ether 3 parts by weight p-phenylenediamine 0.2 parts by weight Composition Example 3 Condensation polymer of p-diazodiphenylamine and paraformaldehyde (diazo resin, p-toluenesulfonate) 10 parts by weight 2-ethylhydroxymethacrylate Copolymer of vinyl acetate and methyl methacrylate 20 parts by weight Ethylene glycol monomethyl ether 150 to 600 parts by weight Blue dye 7 parts by weight The photocurable resin 32 as shown in the above composition example, the base film 30 and the cover. Although it is interposed between the films 33, when a liquid resin as shown in Composition Example 2 is used, the frame 31 (even if integrated with the base film 30 and the cover film 33 to prevent liquid leakage) is used. Good)
Is convenient, and in the case of Composition Example 3, a thin film is formed by coating on the surface of the base film 30 or the surface of the cover film 33 to form a sandwich structure.

The thickness of the layer of the photocurable resin 32 is such that the wood surface S on which the cured resin layer 12 is formed can be easily coated.
The thickness may be such that the peeling step of the cured resin layer 12 after the coating is easy, and it depends on the coating method, etc. mm or less is desirable, especially 1 mm for brush coating
The following are preferred.

It is also preferable to mix a colored dye such as blue into the photo-curable resin so that the cured portion 32b and the uncured portion 3 will be described later.
It is preferable because the boundary with 2a is clearly visible.

Next, after laminating as described above, as shown in FIG. 3A, light is irradiated from the glass plate 38 side to expose the photocurable resin 32 according to the image of the negative film 34. The photocurable resin 32 in the exposed portion is cured.

The light irradiation is performed by using a light source 40 that emits light in a wavelength range required for curing the photocurable resin 32. Generally, a UV light source or a high pressure mercury lamp is used. In some cases, it is possible to illuminate with sunlight, and in the case of expressing sharper patterns, figures, etc.,
Laser light can also be used.

This light irradiation is carried out so that light is incident in a direction perpendicular to the surface of the negative film 34 as much as possible in order to sharply express patterns, figures and the like. The photocurable resin is exposed, that is, the photocurable resin portion corresponding to the light transmitting portion 34b of the negative film is exposed, and the photocurable resin portion corresponding to the light opaque portion 34a is not exposed. Photocurable resin 3
2 hardens.

As a result, the pattern of 32
A hardened portion 32b and a non-hardened portion 32a in which a figure or the like is expressed are generated.

Next, the cover film 33 is peeled from the negative film 34 while the 32 layers of the photocurable resin and the base film 30 are laminated, and the mask film 42 having a three-layer structure is formed.
And

Since the mask film is manufactured by such a process, the mask film can be mass-produced on an industrial scale, like the photoresist in the electronics field and the photosensitive resin relief plate in the relief printing field.

The mask film is its base film 3
The surface of 0 and the surface S of wood are pasted,
As shown in FIG. 4 (a), this sticking is performed by the curing portion 32b.
It may be carried out by pressure bonding with rollers 44 and 45 so that the shape and pattern of the product are not broken, and an adhesive or the like may be used, but it has high releasability from the surface of the wood, and metal particles in the next step. It is desirable that the displacement does not occur at the time of collision.

When cellophane is used as the base film 30, the purpose can be sufficiently achieved by pressure bonding with rollers 44 and 45.

Before the mask film 42 is attached to the wood surface S, it is desirable that the wood surface S be finished smooth with abrasive paper or the like for the later-described painting.

Next, the cover film 33 of the mask film 42 is peeled off, and as shown in FIG. 4B, the photocurable resin 32 layer is exposed, and the metal particles 46 are made to collide with this.

As the metal particles 46, metals such as stainless steel and aluminum are used as spherical bodies having a diameter of several mm or less, but the pattern or figure to be expressed is fine or a sharp drawing line is required. In this case, it is desirable that the size is such that it can reach the wood surface S in conformity with the distance between the hardened portion 32b and the uncured portion 32a, and it is also desirable that the particle diameter be uniform.

For example, if the distance between the hardened portion 32b and the uncured portion 32a is about 1 mm, 0.1 to 0.5 mm.
Any diameter may be used.

Further, the collision of the metal particles 46 may be carried out by injecting them with compressed air or the like, or they may be struck by utilizing mechanical pressure such as the rotational force of a motor, and depending on the case, they may be freely hit. It may be a collision by dropping, and an appropriate means is selected depending on the speed and material of the metal particles 46 at the time of collision, the strength and material of the wood, etc., and the shape and pattern of the hardened part 32b is destroyed by the collision. It is difficult to remove the uncured portion 32a.

In the present embodiment, when the photocurable resin of Composition Example 1 is used to express a pattern in which the distance between the hardened portion 32b and the uncured portion 32a is about 1 mm on the surface of the taro material. Then, a stainless steel ball having a diameter of about 0.3 mm was made to collide with the surface of the taro wood at a speed of 2 m / s by utilizing the centrifugal force generated by the rotation of the motor to form the convex plate 18.

Instead of the metal particles 46, a hard synthetic resin such as polytetrafluoroethylene can be used.

Due to the collision of the metal particles 46, the uncured resin portion, that is, the uncured portion 32a is scraped and detached, and the base film 30 below it is also detached, so that the cured resin layer 12 is formed on the wood surface S. .

Further, by the collision of the metal particles 46, the floating process can be carried out at the same time as in the conventional sandblasting.

After that, the wood surface S is painted as described above. The paint includes water-based paints such as emulsion paints and water-soluble resin paints, oil paints (hardening paints, compounding paints), Oily paints such as oily enamel, alkyd resin paints, aminoalkyd resin paints, unsaturated polyester resin paints, epoxy resin paints, polyurethane resin paints, acrylic resin paints, synthetic resin paints such as vinyl resin paints, cellulose paints, alcohol paints, powders Body paint,
Various paints such as inorganic paints can be used, and those containing a coloring pigment are desirable.

As the coating method, various coating methods such as electrostatic coating, air spraying, roll coater, dip coating and the like are adopted, including a method of coating using a brush or a roller.

After this coating step, when the cured resin layer 12 is peeled off together with the base film 30 thereunder to obtain the state shown in FIG. 6 (a), the non-coating portion 22 (recess) has a pattern / figure. Expressed.

This peeling is carried out while pulling up the end of the base film 30. If the base film 30 is strongly adhered,
It may be peeled off while applying heat with a dryer or the like so that the painted surface is not damaged.

After that, as shown in FIG. 6 (b), a base adjusting agent such as a sanding sealer, a synthetic resin emulsion clearer, a vinyl type sealer, an epoxy type sealer, etc. is used so that a thick film is not formed. Then, a non-coating portion 22 (recessed portion) is filled with the sealer and the undercoating agent layer 24 is formed on the coating layer 20.

Further, after that, the surface of the undercoating agent layer 24 is lightly polished to adjust the substrate, and as shown in FIG. 6 (c), finish coating is performed with a clear lacquer or the like to form the top coating layer 26. Form.

These painted woods are provided for various purposes, for example, wooden furniture such as a closet, a desk, a bookshelf, and the like.
Used to decorate structures such as wooden doors.

Through the series of steps described above, painting is performed on the wood surface S in which desired patterns, figures, etc. are expressed.

According to this coating method, on the wood surface S,
Since it is possible to express finely detailed and sharply drawn patterns / figures, and to be able to ride in line work, it is possible to express uniform patterns / figures on the wood surface with good reproducibility on an industrial scale.

Further, when the pattern / figures and the like expressed on the wood surface become tired, the coating film layer 20, the undercoat adjusting layer 24, the top coating layer 26 and the wood surface are thinly shaved and the desired pattern is re-created. The pattern can be easily changed by performing the above-mentioned series of steps using a negative film on which figures and the like are printed.

Although the present invention has been described based on the embodiments, the present invention is not limited to these.

For example, it is not necessary to use a photocurable resin for forming the cured resin layer 12, and a mixture of an o-naphthoquinonediazide sulfonic acid esterified with a novolak resin as a photosensitizer is mixed with an m-cresol type novolak resin. It is possible to use the cured resin layer 12 and the like, and the cured resin layer 12 can be formed by a configuration in which the exposed portion is not cured but is dissolved and removed by an aqueous solution of sodium carbonate or the like (in this case, a positive film is used). It may be formed.

Further, a glass plate, a negative film, a cover film, a photocurable resin, and a base film,
Although laminated in order, it is possible to interpose a material (such as Vaseline) that does not adversely affect the formation of the cured resin layer between the layers, and the bag-shaped base film is filled with the photocurable resin. As the above, the same material as the base film can be interposed between the cover film and the photocurable resin.

[0077]

EFFECTS OF THE INVENTION Since the method for coating a wood surface according to the present invention is constructed as described above, it has the following effects.

(1) Since the shape / pattern of the cured resin layer formed on the wood surface corresponds to the pattern / figure etc. expressed on the wood surface, it is inevitably / essentially not limited to the wood grain pattern, but any It has an excellent effect that a pattern can be expressed.

(2) It is not affected by the properties of the wood itself such as the thickness, grain direction and hardness of the wood, and it is possible to mass-produce wood products with a uniform pattern / figure without labor and time, and it is complicated. It has an excellent effect that mass-produced wood products with fine patterns can be mass-produced on an industrial scale.

(3) Even if the pattern / figure formed on the wood surface becomes tired, it is possible to easily change it to a completely different pattern / figure, etc., simply by thinly scraping the wood surface and applying the same painting process. It has an excellent effect.

[Brief description of drawings]

FIG. 1 is a manufacturing process drawing of a mask film used in a method for coating a wood surface according to the present invention.

FIG. 2 is a process drawing showing an embodiment of a method for coating a wood surface according to the present invention.

FIG. 3A is a side view during light irradiation in the mask film manufacturing process. (B) is a side view after light irradiation in the same process.

FIG. 4A is a side view of a step of attaching a mask film to a wood surface. (B) is a side view of a step of peeling the cover film and colliding the metal particles with the exposed photocurable resin layer.

FIG. 5A is a side view after the step of colliding the metal particles with the photocurable resin layer. (B) is a side view after the coating process of the wood surface on which the cured resin layer was formed.

FIG. 6A is a side view after the step of peeling the cured resin layer together with the underlying base film. (B) is a side view after processing the ground control agent after the same process. (C) is a side view after the top coat is applied after the same treatment.

[Explanation of symbols]

 S Wood surface 10 Wood 12 Cured resin layer 14 Base film 18 Letterpress 20 Coating layer 22 Non-coating part 24 Base adjustment layer 26 Top coat paint layer 30 Base film 31 Form 32 Photocurable resin 32a Uncured part 32b Cured part 33 cover film 34 negative film 34a light non-transmissive part 34b light transmissive part 38 glass plate 40 light source 42 mask film 44 roller 45 roller 46 metal particle

Claims (3)

[Claims] 1. A step of forming a cured resin layer on a part of the surface of wood, a step of coating the surface of the wood on which the cured resin layer is formed, and a step of peeling off the cured resin layer after the coating. A method of painting a wood surface, which comprises painting the wood surface from a wood. 2. The step of forming a curable resin layer on a part of the surface of wood comprises irradiating the photocurable resin layer formed on the surface of the base film with light through a negative film to expose the photocurable resin in the exposed area. The step of forming a cured resin layer by adhering the base film to a wood surface after curing and causing a hard granule to collide with the base film, wherein the hard resin layer is formed. How to paint. 3. A glass plate, a negative film, a cover film, a photocurable resin, and a base film, which are laminated in this order and are irradiated with light from the glass plate side to be photocurable according to the image of the negative film. A step of forming a mask film by exposing the resin to cure the photocurable resin in the exposed portion, and then peeling the cover film from the negative film while the photocurable resin layer and the base film are laminated,
The mask film is attached to the wood surface from the base film side, the cover film is peeled off and the metal particles are collided with the exposed photocurable resin layer to separate the uncured resin portion together with the underlying base film. Thus, the step of forming a cured resin layer on the surface of the wood, the step of coating the surface of the wood on which the cured resin layer is formed, and the step of removing the cured resin layer together with the underlying base film from the cured resin layer, A method for painting a wood surface, which comprises painting the surface.