JPH06277617A - Method for coating ultraviolet curable resin coating and coating film to be used said method - Google Patents

Abstract

PURPOSE:To perform rapidly coating on-site without using a clean room by a method wherein a semi-cured face of a UV-cured coating layer on a film is brought into tight contact with a face to be coated and then, the semi-cured coating layer is completely cured by irradiating it with UV rays from another face of the film and then, the film is removed. CONSTITUTION:The surface of a coating layer 2 of a UV-curable coating formed on a transparent film 1 is irradiated with UV rays with about 1/3 to 2/3 of the amt. being necessary for complete curing of this coating layer to cure halfly the coating layer. Under the condition where the face of the semi-cured coating layer 21 on the film 10 is brought into contact with the face 31 to be coated of a coating object 3, another face of the film is pressed by means of a roller R to adhere tightly the face of the semi-cured coating layer on the face to be coated. Then, after the semi-cured coating layer is irradiated with UV rays from another face of this coating film 10 so as to cure completely the semi-cured coating layer, the transparent film is removed. A flat face of the transparent film is reproduced as it is on the face to be coated to form a mirror face cured coating layer 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for coating an ultraviolet-curable resin coating material and a coating film used in the method, and particularly to a new coating material suitable for coating plate-like materials used for manufacturing furniture and furniture. It provides technical means.

[0002]

2. Description of the Related Art As is well known, mainly plate-like materials used in the production of high-grade furniture and high-quality furniture are coated with various paints, but paints such as lacquer and lacquer are used. In view of the fact that it takes a long time to dry and cure, in recent years, a coating method (generally referred to as "UV coating") in which an ultraviolet curable resin coating is used to cure the coating in a short time by UV irradiation. Has been used).

A typical aspect of the coating method conventionally used for coating the material with an ultraviolet curable resin coating material is as follows. That is, in an environment where dust and dirt are avoided such as in a clean room, for example, the plate surface of a plate-like material made of lauan plywood is directly or after optionally subjected to a base treatment or a coloring treatment, a commercially available undercoat. UV-curable resin paint for spraying is applied by spraying with a spray gun or brushing with a paint brush, and a commercially available UV irradiator (for example, "Saran UV hand device": product name: manufactured by Saran International Co., Ltd.) ) Is used to irradiate ultraviolet rays for a time of 2 seconds (usually about 10 to 60 seconds) to cure and form the undercoat film surface, enhance the texture and fix the paint applied to the film surface. In order to ensure stability, increase the surface area of the coating surface by sanding the undercoat coating surface with paper (sandpaper) or sand blasting to form fine irregularities. In,
Using a commercially available UV curable resin coating for intermediate coating, in exactly the same manner as above, to form a sanding-processed intermediate coating film surface, and finally by spraying or brushing a commercially available UV coating curable coating for top coating. It is a method of coating, irradiating with ultraviolet rays to dry and cure to form a top coating film surface, and if necessary, further polishing processing to form a mirror surface coating surface. In the above coating method, the UV-curable resin coating material for intermediate coating may be directly applied without using the UV-curable resin coating material for undercoating.・ Sanding may be repeated several times.

[0004]

The UV-curable resin coating material has the advantage that it can be dried and cured easily in a short time. However, since its form is liquid, it goes without saying that
When painting, a spray gun, a brush for painting, etc. are indispensable, and there is a problem that painting cannot be done without such a painting tool. In addition, not only UV-curable resin paints but also general paints, it is necessary to avoid dust and dirt when painting high-grade furniture and high-quality furniture, and for this reason, clean room cleaning There is also a problem that it cannot be painted unless it is in such a working environment. Further, since high-grade furniture and high-quality furniture are required to enhance the texture of the painted surface to give a high-class feeling, in the industry, the undercoat / curing / sanding process-intermediate coating / curing / sanding process-top coating is required. -Each step of curing is indispensable, and it is necessary to perform sanding many times until the required product is completed. However, the sanding process has a problem that it takes a lot of time and requires many years of skill. Therefore, it is possible to make full use of the advantage of shortening the drying and curing time of the ultraviolet curable resin coating material. I can't
It takes a lot of time to complete the product and causes a shortage of coating workers, which makes the cost of this type of product very high.

The present inventor has realized the idea of making a film of an ultraviolet curable resin paint into a film while carrying out research and trial production for many years with the technical problems of solving the above-mentioned problems, and realized it. As a result, we succeeded in solving all of the problems.

[0006]

The above technical problems can be solved by the present invention as follows. That is, the present invention is a method for coating an ultraviolet-curable resin coating material, wherein the ultraviolet-curable resin coating material used for coating an object to be coated is spread on one surface of a transparent film to form a coating layer, and the coating layer is Approximately 1/3 to 2 of the UV dose required to completely cure the paint layer
A film with a semi-cured paint layer is prepared by semi-curing the paint layer by irradiating it with ultraviolet rays at a dose of 3/3, and the semi-cured paint layer side of this film is applied to the coated surface of the coating object. In the contact state, the other surface of the film is pressed by a roller or the like to bring the semi-cured coating layer surface into close contact with the surface to be coated,
Then, the semi-cured coating layer is completely cured by irradiating ultraviolet rays from the other surface of the film, and then the film is removed to form a cured coating layer on the surface to be coated. Method for coating type resin paint, paint film used for the method, and

In the method of coating a UV-curable resin coating material, a UV-curable resin coating material for top coating used for coating an object to be coated is spread on one surface of a transparent film to form a coating layer for top coating. A layer is irradiated with ultraviolet rays at a dose of about 1/3 to 2/3 of the amount of UV irradiation required to completely cure the coating layer, and the coating layer is semi-cured to form a semi-cured top coating layer. After that, the UV-curable resin coating for internal use is spread on the surface of the semi-cured top coating layer to form an internal coating layer, and the ultraviolet rays necessary for completely curing the coating layer are applied to the internal coating layer. The operation of irradiating ultraviolet rays with an irradiation amount of about 1/3 to 2/3 of the irradiation amount to semi-cure the coating layer to form a semi-cured internal coating layer is performed once or multiple times to obtain a semi-cured top coat. Prepare a film in which a paint layer for paint and a semi-cured interior paint layer are laminated Then, while the semi-cured coating layer surface of this film is in contact with the surface to be coated of the object to be coated, the other surface of the film is pressed by a roller or the like to bring the semi-cured coating layer surface into close contact with the surface to be coated, Next, ultraviolet rays are irradiated from the other surface of the film to completely cure all the semi-cured coating layers, and then the film is removed to form a cured coating layer on the coated surface. A method for applying a curable resin paint and a paint film used for the method.

The structure of the present invention will be described in more detail as follows. First, the object to be coated in the present invention is various materials such as wood, plastics material, and metal material used for various purposes, and the surface to be coated is processed smoothly, and the object to be coated is The surface is preferably a horizontal surface, but a curved surface can also be used. A particularly preferable object is a plate-shaped material that is commonly used for manufacturing furniture and furniture.

Next, various materials and equipment used in the present invention will be described. The UV-curable resin coating material may be a commercially available product, and various UV-curable resin coating materials which are transparent or colored for undercoating, intermediate coating and top coating are manufactured by a manufacturer such as Dainippon Ink Industry Co., Ltd., Since it is on the market, it can be easily obtained according to the purpose of use. The term “internal UV curable resin coating material” in the present specification means a UV curable resin coating material for undercoating and / or a UV curable resin coating material for intermediate coating.

As the transparent film, various commercially available plastic films, cellophane, etc. can be used, and various thicknesses are commercially available. Among them, the thickness is within the range of about 20 to 200 μm. What is necessary is just to obtain and use. When a plastic film is used, polypropylene, polyester, polyethylene and polycarbonate films are suitable.

In carrying out the present invention, two types of transparent film having a required thickness selected and obtained, which are roughened and have a smooth surface, are prepared. The former has a thickness of about 1
A transparent plastic film of 00 μm to 200 μm is suitable. The former rough surface processing is optimally performed by the well-known sandblasting method, and fine irregularities are formed on the film surface with a grain size selected from the range of 80 to 240 mesh. For the latter, one having a surface as smooth as possible may be selected from the commercially available products.

Various types of ultraviolet irradiators used for irradiating ultraviolet rays are commercially available, so that the required ones can be easily selected and obtained. The above-mentioned "Saran UV hand device" is sold as an ultraviolet curable resin coating material. Because it is
If this is selected, it is convenient for handling.

As the roller, a commercially available hard rubber roller or a hard plastic roller may be used. The roller width is appropriately selected according to the area of the surface to be coated. A commercially available rubber spatula may be used instead of the roller.

Now, the present invention is carried out by the following modes using the above materials and equipment. In addition, FIGS. 1 to 7 used for description are vertical cross-sectional explanatory views schematically showing typical embodiments.

A. Preparation of paint film: (1) First, a required UV-curable resin paint used for painting an object to be painted is selected, and the paint is spread on a required transparent film 1 to form a paint layer 2 (Fig. 2). The thickness of the paint layer 2 is preferably selected from the range of about 10 to 300 μm, and it is convenient to use a spray gun for paint for spreading. When the transparent film 1 is very thin, the transparent film 1 is spread on a cardboard, a plywood board or the like while the periphery of the film is temporarily fixed, and the transparent film 1 to be described later is
The coating layer may be semi-cured by the operation of (2) and then the film may be removed. When the final coated surface of the object to be coated has a matte finish, the rough surface of a transparent film (made of plastics) with a grain size of 180 to 240 mesh and roughened by sandblasting When a resin paint layer is formed to give a mirror finish,
An ultraviolet curable resin paint layer for topcoat is formed on a smooth surface of a transparent film having a smooth surface.

When it is necessary to apply an intermediate coat or a top coat after forming an undercoat or an intermediate coat film layer on the surface to be coated of an object to be coated, roughening is performed by a sandblast method with a grain size of about 80 mesh for the undercoat. UV-curable resin coating layer for undercoating is formed on the rough surface of the applied transparent film, and UV-curable for intermediate coating on the rough surface of the transparent film that has been roughened by sandblasting with a grain size of 120 to 160 mesh for intermediate coating. A resin paint layer is formed.

(2) Next, the surface of the coating layer 2 of the transparent film 1 on which the coating layer 2 has been formed is irradiated with an amount of about 1/3 to 2/3 of the ultraviolet ray irradiation amount required for completely curing the coating layer. The coating layer is semi-cured by irradiating ultraviolet rays in a certain amount. The irradiation amount can be easily controlled by the irradiation time.

That is, a part of the transparent film 1 on which the paint layer 2 is formed is cut out to obtain a sample for measuring the dose, and this sample is placed at a position a certain distance from the light source of the ultraviolet irradiator V, and the paint layer surface The composition is irradiated with ultraviolet rays and the time from the start of irradiation to the time when the coating layer is completely cured is measured to determine the irradiation time required for complete curing (hereinafter referred to as “complete curing time”). Then, the distance from the surface of the coating layer 2 of the transparent film 1 on which the coating layer 2 is formed to the light source of the ultraviolet irradiator V is set to a distance equal to the constant distance,
By irradiating the surface of the paint layer 2 with ultraviolet rays V ₁ for a time corresponding to about 1/3 to 2/3 of the complete curing time previously obtained,
The paint layer may be semi-cured (see FIG. 2). In addition,
The “semi-cured” in the present invention means a state in which the paint layer is in a gelled state and is hardened to such an extent that the paint does not stick to the finger even if the surface is touched with a finger.

The rough surface 111 of the transparent film 11 having a rough surface according to the present invention or the transparent film 12 having a smooth surface
UV-curable resin coating layer spread on the smooth surface 121 of
21 is a UV-curable resin coating characterized in that it is in a semi-cured state by being irradiated with ultraviolet rays at an irradiation amount of about 1/3 to 2/3 of the ultraviolet irradiation amount necessary for completely curing the coating layer. The paint film 10 used in the painting method is prepared by the above-described operation (see FIG. 1). 1A shows the case where the transparent film 11 having a roughened surface is used, and b shows the case where the transparent film 12 having a smooth surface is used.

B. Coating of coating object: (1) First, with the semi-cured coating layer 21 surface of the coating film 10 prepared in A above in contact with the coating surface 31 of the coating object 3, the other surface of the coating film 10 is a roller. By pressing with R, the surface of the semi-cured coating layer is brought into close contact with the surface to be coated (see FIG. 3). The surface 31 to be coated of the object 3 to be coated may be provided with a base treatment layer or a color treatment layer 311 by a conventional method, if necessary.

When the paint film 10 is brought into contact with the surface 31 to be coated, the paint film is cut according to the shape and area of the surface to be coated. It is important that the semi-cured coating layer 21 is sufficiently spread on the surface to be coated by pressing the roller R evenly from the other surface of the coating film 10 which is brought into contact with the surface to be coated 31. In this case, the coated surface 31 is preferably a horizontal surface, but even if the coated surface is a curved surface, if the transparent film 1 is thin (usually 100 μm or less),
The paint film 10 can be attached to the curved surface. In addition, even if the surface 31 to be painted is positioned in the oblique direction or the vertical direction,
If the paint film 10 is pressed against the surface to be painted and brought into contact with it, the paint film will not fall off, so that the pressing work by the roller R can be performed. 3A shows the case where the transparent film 11 having a roughened surface is used, and b shows the case where the transparent film 12 having a smooth surface is used.

(2) Next, after irradiating the other side of the coating film 10 having the semi-cured coating layer adhered to the surface 31 to be coated with ultraviolet rays until the semi-cured coating layer is completely cured, the transparent film is removed. For example, the cured coating layer 22 is formed on the surface to be coated (see FIG. 4). 4A shows the case where a transparent film having a roughened surface is used, and b shows the case where a transparent film having a smooth surface is used. In addition,
The distance from the other surface of the paint film 10 to the light source of the ultraviolet irradiator at the time of irradiation may be equal to the distance when the complete curing time is obtained in A- (2), but if the distance is made shorter. Irradiation efficiency can be improved.

In this case, if a transparent film having a roughened surface is used, as shown in a in FIG.
On the 22 side, the rough surface of the transparent film is reproduced as it is, and if the rough surface is formed by the sandblast method,
The matte painted surface 221 is the same as the rough surface formed by sanding the painted surface by the conventional sandblasting method. Further, when a transparent film having a smooth surface is used, as shown by b in FIG. 4, the smooth surface of the transparent film is reproduced as it is on the surface 22 of the cured coating layer.
22.

When it is necessary to form the intermediate coating film layer on the upper surface of the cured coating film layer 22 having the matte coating surface 221, as described in A- (1). A transparent film on which an ultraviolet curable resin coating layer for intermediate coating is formed is
A coating film layer 22 having a semi-cured coating layer by the operation of (2) and having the matte coating surface 221 is used.
When it is necessary to form an overcoating coating layer on the upper surface of the above as an intermediate coating film layer, the transparent film 12 on which the ultraviolet curing resin coating material layer for overcoating described in A- (1) is formed is
The paint layer is semi-cured by the operation of (2). And the semi-cured paint layer of these paint films
21 side is brought into contact with the matte coating side 221, B- (1),
By performing the same operation as (2) (see FIG. 5), a desired coating layer can be formed.

Furthermore, the present invention can take the following embodiments. That is, the UV curable resin for internal use is formed on the surface of the coating layer of the coating film on which the coating layer for semi-curing top coating in which the UV-curable resin coating for top coating is in a semi-cured state is formed by the operations of A- (1) and (2). A-using resin paint
By performing the same operations as in (1) and (2) to form a semi-cured interior coating layer, a coating film in which a semi-cured top coating composition layer and a semi-cured interior coating layer are laminated (see FIG. 6).
Reference) is prepared and the same operation as B- (1) and (2) is performed using this to form a laminated cured coating film layer on the coated surface of the object to be coated. The semi-cured interior coating layer can be formed into a plurality of layers by repeating the same operations as in A- (1) and (2).

In FIG. 6, the rough surface 111 or the transparent surface having a smooth surface of the transparent film 11 according to the present invention, which is prepared by repeating the same operation as A- (1) and (2), is prepared. The UV-curable resin coating layer for top coating spread on the smooth surface 121 of the film 12 has a UV irradiation amount of about 1/3 to 2/3 of the UV irradiation amount required to completely cure the coating layer. The internal UV-curable resin coating material that has been irradiated to form the top coating material layer 211 that is in a semi-cured state and that has been spread on the surface of the coating material layer is exposed to the ultraviolet rays necessary to completely cure the coating material. The structure of the paint film 100 used for the coating method of the UV-curable resin paint, which forms the semi-cured interior paint layer 212 by being irradiated with UV rays at an irradiation amount of about 1/3 to 2/3 Indicated. 6A shows the case where the transparent film 11 having a roughened surface is used, and b shows the case where the transparent film 12 having a smooth surface is used.

In FIG. 7, the above-mentioned paint film 100 was used to
A mode in which the cured coating layer 220 is formed on the surface 31 to be coated of the object 3 to be coated by the same operation as in (1) and (2) is shown. 7A shows the case where a transparent film having a roughened surface is used, and b shows the case where a transparent film having a smooth surface is used. In this case as well, the cured coating layer 220 has a matte coating surface when a transparent film having a roughened surface is used, as described in B- (2).
221 and a mirror-coated surface 222 when a transparent film having a smooth surface is used.

In any of the above-mentioned paint films having the semi-cured paint layer according to the present invention formed thereon, a well-known peelable film is placed on the paint layer surface and temporarily attached,
Convenient for handling and cutting when not in use. The storage location should be cool and dark.

[0029]

The feature of the present invention is that the ultraviolet curable resin coating used for coating the object to be coated is spread on the transparent film in advance to form a coating layer, and the coating layer is irradiated with ultraviolet rays to be semi-exposed. A semi-cured paint layer is placed as a cured paint layer, and the semi-cured paint layer is completely cured by irradiating ultraviolet rays from the other surface of the transparent film while the semi-cured paint layer is in close contact with the surface of the object to be coated during coating. The point is that a cured coating layer is formed by. The UV-curable resin coating material cures almost in proportion to the amount of UV irradiation and reaches a completely cured state, but if the UV irradiation is stopped before it reaches the completely cured state, the progress of curing also stops at that point. By controlling the irradiation amount, the progress of curing can be stopped in the required curing state. Then, when the ultraviolet curable resin coating material in the required curing state is irradiated with ultraviolet rays again, curing proceeds from the curing state to reach the complete curing state.

The present invention utilizes the above-mentioned phenomenon, and the ultraviolet ray irradiation necessary for completely curing the coating layer of the ultraviolet curable resin coating material used for the coating object formed on one surface of the transparent film is applied. The coating film is prepared by irradiating the coating layer with ultraviolet rays at a dose of about 1/3 to 2/3 of the dose. If the irradiation dose is less than about 1/3, the surface of the coating layer is sticky, and if you touch it with your fingers, it will be difficult to handle.If the irradiation dose exceeds about 2/3, the coating material will be difficult to handle. It is difficult to obtain the required fluidity for the layer. As a result of numerous experiments conducted by the inventor of the present invention, when the irradiation dose was about 1/3 to 2/3, as shown in Examples and Comparative Examples below, the handling and fluidity were both satisfactory. It has been confirmed that the paint layer in the cured state can be formed.

Naturally drying type paints such as lacquer, lacquer, and enamel begin to dry and harden immediately after being applied. However, the paint film whose coating layer is semi-cured is irradiated again with ultraviolet rays. The progress of curing has stopped until it reaches the end, and it has fluidity. Therefore, when the coating layer surface of the coating film is brought into contact with the surface to be coated of the object to be coated, the other surface of the film is pressed by a roller or the like to bring the coating layer surface into close contact with the surface to be coated. Since the contact surface of the fluid coating material layer with the film surface is also pressed and closely adhered, the contact surface has the same shape as the film surface (fine rough surface or smooth surface). In this state, the coating layer is completely cured by irradiating ultraviolet rays from the other side of the transparent film, and then the film is removed, and the morphology of the film surface is reproduced on the cured coating layer surface as if it were transferred. . Peeling between the coating surface and the film surface after curing by UV irradiation is easy because the coating surface is cured, and the form reproduced on the cured coating surface (fine rough surface or smooth surface) Surface) is not damaged. In the present invention, when a transparent film having a roughened surface is used, the transparency of the film is lower than that before the roughened surface, but the transparency of ultraviolet rays necessary for completely curing the paint layer is reduced. There is no hindrance.

Further, in the present invention, since the surface of the object to be coated is coated with the film covered, the influence of dust and dust can be avoided as much as possible. Then, since the coating layer is completely cured by irradiating the coating layer with ultraviolet rays while covering the film, it is possible to contain the odor generated during curing of the ultraviolet ray curable resin coating material. In addition, when the object to be coated is wood such as lauan wood, spraying or brushing the surface to be coated with lacquer or lacquer causes the paint to get into the wood grain, resulting in a dent on the surface of the coating film. It is well known that the coating layer is pressed by a roller or the like evenly from the top of the film to adhere the coating layer. In the process of pressing and spreading, the dents are automatically replenished with paint, so that partial pits are not formed.

[0033]

EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples. Example 1 Preparation of paint film: First, 50 μm in thickness with smooth surface
m transparent polyester film (Torel mirror: product name: manufactured by Toray Industries, Inc.) UV-curable resin coating (overhard coat 440UV: product name: distributor Saran International Co., Ltd.) Co., Ltd.) was sprayed with a spray gun for painting to form a paint layer having a thickness of about 20 μm. 30 cm from the light source of the ultraviolet irradiation device (Saran UV hand device: product name: Saran International Co., Ltd.)
Place it in the released position, irradiate the coating layer surface with ultraviolet rays until the coating layer is completely cured, and measure the irradiation time from the start of irradiation to the time of complete curing, and the complete curing time is about 60 seconds. Met. Next, the film on which the coating layer is formed is placed at a position 100 cm away from the light source of the ultraviolet irradiator (described above), and the coating layer surface is irradiated with ultraviolet rays for 20 seconds to semi-cure the coating layer and top coat it. A paint film (a) for paint was prepared. For comparison, when the irradiation time was 15 seconds, the paint layer surface was sticky and the paint adhered when touched with a finger.

Further, a transparent film made of polyester with a smooth surface and a thickness of 188 μm (Torel Miller: trade name: manufactured by Toray Industries, Inc.) is subjected to sandblasting (grain size 180 mesh) to make a rough surface with fine irregularities. The film was sprayed onto the rough surface with a UV-curable resin coating for overcoating (overhard coat 440UV: trade name: distributor Saran International Co., Ltd .: manufacturer Dainippon Ink and Machinery Co., Ltd.) in the same manner as above. Thickness about 20μ
A m 2 paint layer was formed. The complete curing time of this paint layer,
It was about 60 seconds as determined in the same manner as above. Next, the coating layer surface of the film having the coating layer formed thereon was irradiated with ultraviolet rays for 20 seconds in the same manner as described above to semi-cure the coating layer to prepare a coating film (b) for top coating. For comparison, when the irradiation time was 15 seconds, the paint layer surface was sticky and the paint adhered when touched with a finger.

An ultraviolet curable resin coating for undercoating (undercoat 260UV: trade name: sales) is used on the rough surface of the film except that the surface is roughened by sandblasting with a grain size of 120 mesh. Former Saran International Co., Ltd. (manufacturer, Dainippon Ink and Machinery Co., Ltd.) was sprayed in the same manner as above, and the thickness was about 100.
A paint layer of μm was formed. The complete cure time of this paint layer was determined in the same manner as above and was about 70 seconds.
Next, the coating layer surface of the film on which the coating layer was formed was irradiated with ultraviolet rays for 40 seconds in the same manner as described above to semi-cure the coating layer to prepare a coating film (c) for intermediate coating.
For comparison, when the irradiation time was 30 seconds, the paint layer surface was sticky and the paint adhered when touched with a finger. It should be noted that a peelable film (EKR78-D-BC) is formed on each semi-cured paint layer surface of each of the paint films (a) to (c) obtained here.
PE: product number: manufactured by Lintec Co., Ltd.) was temporarily attached.

Coating of the object to be coated: Lauan plywood which has been subjected to a base treatment and a coloring (mahogany color) treatment according to a conventional method is used as an object to be coated, and peeled off using the above-mentioned coating film (a) on the 5th day from the preparation date. Of the semi-cured paint layer except for the flexible film, the plate surface of the coating object is contacted, the other surface of this paint film is uniformly pressed by a hard rubber roller, and then the other surface of the paint film and an ultraviolet irradiator. The distance from the light source (same as above) was set to 15 cm and ultraviolet rays were irradiated for 25 seconds to completely cure the semi-cured coating layer, and then the film was peeled off to form a cured coating layer. The smooth surface of the film used was reproduced exactly as it was on the surface of this coating layer, and the surface of the coating film, which is generally called mirror finish, was finished.

Also, a semi-cured coating composition is prepared by using a lauan plywood which has been colored (black) treated according to a conventional method as an object to be coated and using the coating film (c) on the 7th day from the preparation date, excluding the peelable film. Contact the layer surface to the plate surface of the coating object,
A hard coating layer was formed in the same manner as above except that the other side of this paint film was uniformly pressed with a hard rubber roller, and then the ultraviolet irradiation time was 35 seconds. It was confirmed by visual observation using a magnifying glass that the fine ruggedness of the film used was reproduced exactly as it was on the surface of this coating layer, and that it had the appearance of being subjected to conventional sanding.

Then, using the coating film (b) on the 7th day from the date of preparation, except for the peelable film, the semi-cured coating layer surface is brought into contact with the cured coating film layer surface, and the other surface of this coating film is applied. After pressing uniformly with a hard rubber roller, except that the ultraviolet irradiation time was 25 seconds, in the same manner as above,
A cured coating layer was formed. It was confirmed in the same manner as above that the fine unevenness of the film used was reproduced as it was on the surface of the coating layer. The cured coating film layer surface obtained here was in the same level as the state of the coating film surface called so-called "matte finish" with so-called "depth" in high-end furniture.

Example 2 Preparation of paint film: First, a thickness 120 with a smooth surface.
A UV-curable resin coating for overcoating (overhard coat 440UV: described above) was sprayed onto a smooth surface of a transparent transparent polyester film (Torel mirror: same as above) having a thickness of about 15 μm in the same manner as in Example 1. A topcoat paint layer was formed. When the complete curing time of this top coating composition layer was determined in the same manner as in Example 1, it was about 60 seconds. Next, the coating layer surface of the film having the above coating layer formed thereon is irradiated with ultraviolet rays for 20 seconds to semi-cure the coating layer in the same manner as in Example 1, and then the coating layer surface is subjected to intermediate coating. UV curable resin coating (undercoat 260UV: above) for
Approximately 100μ thick by spraying with a spray gun for painting
A paint layer for intermediate coating of m 3 was formed. When the complete curing time of this intermediate coating material layer was determined in the same manner as in Example 1, it was 70 seconds. Next, ultraviolet rays are applied to the coating layer surface of the film having the above-mentioned intermediate coating layer formed thereon for 40 seconds to semi-cure the coating layer in the same manner as in Example 1 to semi-cure the coating layer for semi-curing and semi-curing. A paint film (d) in which a paint layer for intermediate coating was laminated was prepared.

The topcoat paint film (b) prepared in Example 1 was removed from the peelable film on the third day from the preparation date, and the semi-cured (topcoat) paint layer surface was coated with an intermediate-coating UV-curable film. Resin coating (Undercoat 260UV: above)
Spraying was carried out in the same manner as above to form an intermediate coating material layer having a thickness of 150 μm. When the complete curing time of this intermediate coating material layer was determined in the same manner as in Example 1, it was about 100 seconds.
Next, ultraviolet rays are applied to the coating layer surface of the film having the above-mentioned intermediate coating layer formed thereon for 55 seconds in the same manner as in Example 1 to semi-cure the coating layer and to semi-cure it. A paint film (e) in which a paint layer for intermediate coating was laminated was prepared. A peelable film (described above) was temporarily attached to each semi-cured coating layer surface of each of the coating films (d) and (e) obtained here.

Coating of object to be coated: According to a conventional method, Lauan plywood which has been subjected to a base treatment and a coloring (mahogany color) treatment is used as an object to be coated, and the coating film (d) on the third day from the preparation date is used. Except for the peelable film, the semi-cured intermediate coating material coating layer surface is brought into contact with the plate surface of the coating object, and the other surface of this coating film is uniformly pressed by a hard rubber roller, and then the other surface of the coating film. The distance from the light source of the ultraviolet irradiator (same as above) was set to 15 cm, and ultraviolet rays were irradiated for 35 seconds to completely cure all the semi-cured coating layers, and then the film was peeled off to form a cured coating layer. The smooth surface of the film used was reproduced exactly as it was on the surface of this coating layer, and it had the same high quality as the state of the coating surface, which is called mirror finish in high-end furniture.

A lauan plywood which has been colored (black) -treated according to a conventional method is used as an object to be coated, and the above-mentioned coating film (e) on the third day from the preparation date is used, except for the peelable film, and a semi-cured intermediate coating. The coating layer surface is brought into contact with the plate surface of the coating object, and the other surface of the coating film is uniformly pressed with a hard rubber roller, and then the ultraviolet irradiation time is set to 45 seconds. A membrane layer was formed. It was confirmed by visual observation using a magnifying glass that the fine unevenness of the film used was reproduced as it was on the surface of the coating layer. The cured coating film layer surface obtained here was in the same level as the state of the coating film surface called so-called "matte finish" with so-called "depth" in high-end furniture.

[0043]

According to the present invention as described above, the following effects can be obtained. (1) On-site coating can be performed easily and quickly without using a clean room. (2) When performing on-site painting, the paint can be transported to the site very easily. (3) Even if the surface to be coated is located diagonally or vertically,
Since there is no "dripping" of the paint, the painting work can be done very easily. (4) The coating work can be performed without being affected by the odor generated during the curing of the ultraviolet curable resin coating material. (5) Rough surface processing, which has the same effect as the sanding processing, which is indispensable for painting furniture and furniture, can be easily and quickly performed without requiring any skill. (6) It is possible to deal with the case where either a matte finish or a mirror finish is required for the finished coating film surface of the product. (7) Even when a material such as lauan wood having wood grain is targeted, the coating film surface does not have a dent. (8) If necessary, the formation of the internal coating film layer and the formation of the top coating film layer can be carried out simultaneously. (9) The paint film can be stocked and placed and used as needed. (10) The cost of painting work can be significantly reduced. Therefore, it can be said that the industrial applicability of the present invention is extremely high.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional explanatory view schematically showing an embodiment of a paint film according to the present invention.

FIG. 2 is a vertical cross-sectional explanatory view schematically showing the manufacturing process of the paint film according to the present invention.

FIG. 3 is a vertical cross-sectional explanatory view schematically showing an embodiment of a coating method according to the present invention.

FIG. 4 is an explanatory longitudinal sectional view schematically showing an embodiment of a coating method according to the present invention.

FIG. 5 is an explanatory longitudinal sectional view schematically showing an embodiment of the coating method according to the present invention.

FIG. 6 is an explanatory longitudinal sectional view schematically showing an embodiment of the paint film according to the present invention.

FIG. 7 is a vertical cross-sectional explanatory view schematically showing an embodiment of the coating method according to the present invention.

[Explanation of symbols]

1 Transparent Film 10 Paint Film According to the Present Invention
100 Paint Film According to the Present Invention 11 Transparent Film with Roughened Surface 111 Rough Surface 12 Transparent Film with Smooth Surface 121 Smooth Surface 2 Paint Layer 21 Paint Layer in Semi-Cured State 211
Semi-cured topcoat paint layer 212 Semi-cured interior paint layer 22 Cured coating layer 220 Cured coating layer 221 Matte coated surface 222 Mirror coated surface 3 Coating object 31 Painted surface 311 Treatment layer
V UV irradiator V ₁ UV R roller

Claims (6)

[Claims] 1. A method for coating an ultraviolet-curable resin paint, wherein an ultraviolet-curable resin paint used for coating an object to be coated is spread on one surface of a transparent film to form a paint layer, and the paint layer is formed on the paint layer. A film having a semi-cured coating layer is prepared by semi-curing the coating layer by irradiating the coating layer with ultraviolet rays at an irradiation amount of about 1/3 to 2/3 of the ultraviolet irradiation amount required to completely cure the layer. While the semi-cured coating layer surface of this film is in contact with the surface to be coated of the object to be coated, the other surface of the film is pressed by a roller or the like to bring the semi-cured coating layer surface into close contact with the surface to be coated, and then An ultraviolet curing type characterized by forming a cured coating layer on the surface to be coated by removing ultraviolet rays from the other surface of the film to completely cure the semi-cured coating layer and then removing the film. How to paint resin paint. 2. A method for coating an ultraviolet curable resin coating material, wherein an ultraviolet curable resin coating material for top coating used for coating an object to be coated is spread on one surface of a transparent film to form a coating layer for top coating, and this top coating is formed. Coating layer for semi-curing by irradiating the coating layer with ultraviolet rays at an irradiation amount of about 1/3 to 2/3 of the ultraviolet irradiation amount required for completely curing the coating layer. After the formation of the coating composition, a UV-curable resin coating material for internal application is spread on the surface of the semi-cured top coating material layer to form an internal coating layer, which is necessary to completely cure the internal coating layer. The operation of irradiating with an ultraviolet ray at an irradiation amount of about 1/3 to 2/3 of the appropriate ultraviolet irradiation amount to semi-cure the coating layer to form a semi-cured internal coating layer is performed once or several times, Prepare a film in which a cured topcoat paint layer and a semi-cured interior paint layer are laminated. Then, while the semi-cured coating layer surface of this film is in contact with the surface to be coated of the object to be coated, the other surface of the film is pressed by a roller or the like to bring the semi-cured coating layer surface into close contact with the surface to be coated, Next, ultraviolet rays are irradiated from the other surface of the film to completely cure all the semi-cured coating layers, and then the film is removed to form a cured coating layer on the coated surface. How to apply curable resin paint. 3. The ultraviolet ray according to claim 1, wherein the ultraviolet-curable resin coating material is spread on the rough surface of the roughened transparent film or the smooth surface of the transparent film having a smooth surface to form a coating layer. How to apply curable resin paint. 4. A topcoat paint layer is formed by spreading an ultraviolet-curable resin coating material for topcoating on the rough surface of a roughened transparent film or a smooth surface of a transparent film having a smooth surface. 2. The method for coating an ultraviolet curable resin paint according to 2. 5. An ultraviolet-curable resin coating layer spread on a rough surface of a roughened transparent film or on a smooth surface of a transparent film having a smooth surface to completely cure the coating layer. The coating film used in the coating method of the ultraviolet curable resin coating composition according to claim 1, wherein the coating film is irradiated with ultraviolet rays at an irradiation amount of about 1/3 to 2/3 of the necessary ultraviolet irradiation amount and is in a semi-cured state. . 6. A UV-curable resin coating layer for topcoat, which is spread on the rough surface of a roughened transparent film or the smooth surface of a transparent film having a smooth surface, to completely cure the coating layer. It is irradiated with ultraviolet rays at an irradiation amount of about 1/3 to 2/3 of the ultraviolet irradiation amount required to form a semi-cured topcoat paint layer, and it is spread on the paint layer surface. The internal UV curable resin coating is about 1/3 to 2/3 of the UV irradiation required to completely cure the coating.
The paint film used in the method for coating a UV-curable resin paint according to claim 2, wherein the paint film for internal use is formed in a semi-cured state by being irradiated with ultraviolet rays at a certain irradiation amount.