JP4712245B2 - Blur painting method for building board - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a building material board blur coating method, and more particularly to a coating method suitable for an exterior building material board made of a cement-based mixed material.
[0002]
[Prior art]
In recent years, ceramic-based building material boards have been widely used for exterior building materials with excellent design, and products with an uneven pattern or pattern imitating natural stone on the outer wall surface have been commercialized. In addition, in order to reduce costs, proposals have been made to improve design by devising the painting method.
[0003]
This type of building material board is formed into a predetermined shape by pouring a slurry-like cementitious mixed material into a mold, suction dehydrating on a filter cloth and applying a patterning process, etc., and curing (curing) and After performing a drying process or a grooving process as needed, it is painted.
[0004]
Then, for example, a base layer of a water-soluble paint is applied and formed on the entire board surface by, for example, a roll coating method, and after the base layer is dried, a paint having a color different from that of the base layer only on the convex surface or only in a specific area. The tile surface shape or a specific pattern can be applied. However, with this method, it has been difficult to finish a state in which the color is shaded or mixed with a natural stone, a high-quality brick, or a tile.
[0005]
In addition, attempts have been made to improve design properties by irregularly depositing paint droplets on a lower coating surface using a spray nozzle or the like. However, with this method, it was not possible to finish a state of mixed colors or a state close to natural stone, high-grade bricks, tiles, or the like.
[0006]
In order to solve such a problem of the prior art, the applicant of the present application has proposed a painting method capable of performing painting of a plurality of colors in which color shades and mixing methods are close to natural (Japanese Patent Application No. Hei 10). -20701).
[0007]
However, even in this coating method, blurring did not become irregular where there were no irregularities on the board surface, and it was not possible to finish it close to natural stone, high-grade bricks, tiles, or the like. In addition, when paint droplets were applied to the surface of the board on which moisture did not adhere using a spray nozzle, a spray pattern remained, making it difficult to obtain natural blur and a high-class feeling.
[0008]
An object of the present invention is to solve the above-described problems of the prior art and to realize a painting method capable of performing painting of a plurality of colors, in which color shades and mixing methods are close to natural.
[0009]
[Means for Solving the Problems]
The present invention
(A) After coating the board surface with a paint, immediately after spraying particles with a particle size of 0.01 to 5 mm on the board surface, and further overcoating with the paint to form an undercoat layer,
(B) attaching moisture to the surface of the undercoat layer,
(C) A plurality of paint drops of water-dilutable paint different in color from the undercoat layer are attached to the surface;
(D) forming a blurred area in which paint is diffused in the periphery of a plurality of irregularly shaped paint adhesion areas;
The present invention provides a method for blur coating a building material board.
As an embodiment,
(E) After coating the board surface with a paint containing particles having a particle size of 0.01 to 5 mm to form an undercoat layer,
(B) attaching moisture to the surface of the undercoat layer,
(C) A plurality of paint drops of water-dilutable paint different in color from the undercoat layer are attached to the surface;
(D) forming a blurred area in which paint is diffused in the periphery of a plurality of irregularly shaped paint adhesion areas;
The present invention provides a method for blur coating a building material board.
As an embodiment,
On the surface, use a board with an uneven pattern with a pitch of unevenness of 50 mm or less in advance and a height from the bottom of the uneven valley to the top of 0.3 mm or more.
It provides a method of blurring the building material board.
As an embodiment,
Moisture is previously attached to the board surface, and then the undercoat layer is formed.
It provides a method of blurring the building material board.
[0010]
According to such a configuration, the paint droplets that are sufficiently large to allow the dispersed water-dilutable paint droplets to diffuse into the prescribed range when the undercoat layer containing particles of a prescribed particle size is in a wet state. Therefore, the water-dilutable paint droplets diffuse and the boundary line with the lower paint layer becomes ambiguous, and the irregular-shaped paint region is blurred.
[0011]
In addition, after the board surface is primed with at least one color paint containing particles of a predetermined particle size, a plurality of paint droplets having a different color from the undercoat layer are attached to the surface of the undercoat layer in a state where moisture is adhered to the surface. To form a blurred area where paint diffused around the area where multiple irregular-shaped paints are attached, or the surface of the paint area where multiple paint droplets of different colors were applied to the board surface completely. Before drying, the next paint droplets are sequentially attached to the surface, and when a blur area in which the paints of the plurality of colors diffuse to each other is formed at the periphery of a plurality of irregularly shaped paint adhesion areas, It is possible to obtain subtle shades that reflect the colors and the paint colors of each other.
[0012]
Furthermore, when a concavo-convex pattern having an uneven pitch of 50 mm or less and a height from the valley bottom to the top of the concavo-convex of 0.3 mm or more is attached to the surface of the board in advance, a plurality of painted parts including a blurred paint region; Combined with the uneven surface of the board, a more natural and elegant painted surface can be obtained. In addition, the board surface is preliminarily moistened (for example, water droplets are sprayed onto the cured and hardened board to wet the surface), and then the surface is primed with a paint that can be diluted with water. After coating with a paint containing particles having a particle size of .01 to 5 mm to form an undercoat layer, or immediately after coating the board surface with a paint, particles having a particle size of 0.01 to 5 mm are sprayed on the board surface. After the undercoating layer is formed by recoating with a paint, the undercoating layer can be colored.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described.
FIG. 1 and FIG. 2 are diagrams for explaining an embodiment of a building material board blur coating method according to the present invention, and are sectional views of a building material board 10 in which an undercoat layer 12 is formed on the surface of a board body 11.
[0014]
First, a process before painting the undercoat layer 12 will be described.
When forming the building material board 10 as a ceramic-type exterior material used for the outer wall, a slurry-like cement-based mixed material is poured into a mold or supplied in layers on a filter cloth, which is a known method ( For example, refer to Japanese Examined Patent Publication No. 56-33129) and after suction dehydration, it is formed into a predetermined board shape, subjected to curing (curing) and drying process or grooving processing as necessary, and then the undercoat layer 12 is applied. It has become so.
[0015]
Specifically, for example, a slurry-like cementitious mixed material is layered and sucked and dehydrated, and then an uneven pattern is attached if necessary, and the surface of the building material board 10 has an uneven pitch L (see FIG. 2) of 50 mm or less in advance. And the uneven | corrugated pattern whose height (depth d shown in FIG. 2) from the valley bottom part of an unevenness | corrugation to the top part is 0.3 mm or more is attached.
[0016]
When painting the undercoat layer 12 of the building material board 10, first, for example, a monochromatic base is coated on at least one surface side of the board body 11 using an application means such as a flow coater (or a spray nozzle or the like). Immediately thereafter, particles 13 having a particle diameter of 0.01 to 5 mm are sprayed on the board surface, and then heated for a predetermined time by a normal heating and drying means to forcibly dry or naturally dry. After drying, overcoating is further performed with the same coating material, and then heated for a predetermined time by a normal heating and drying means for forced drying, or naturally dried to form the undercoat layer 12.
[0017]
It is also possible to adopt a method in which the undercoating is performed, the particles 13 are sprayed immediately thereafter, and then the same coating or different coatings are applied without drying. With this method, the time required for the process can be shortened.
As another method, a method in which the undercoat layer is formed by applying the surface of the board with a paint containing particles having a particle diameter of 0.01 to 5 mm may be employed. In this case, the painting process is only required once and the time required for the process can be shortened.
[0018]
The paint used for the undercoat layer 12 can be, for example, an acrylic emulsion paint that is a water-soluble paint, an acrylic silicone paint, or an acrylic urethane paint that is a solvent-based paint. The viscosity of the paint varies depending on the coating method (flow coater application, spray application, etc.) and is adjusted to an optimum value.
[0019]
As the particles 13 dispersed on the undercoat layer 12 and included in the undercoat layer 12 and the particles 13 included in the coating material to be applied, inorganic particles or organic particles generally called aggregates can be used. Specifically, for example, silica powder, methyl methacrylate resin, and the like can be used. The particle size of the particles 13 needs to be in the range of 0.01 to 5 mm. This is because when the particle size is less than 0.01 mm, the blurring becomes small and becomes a problem, and when the particle size exceeds 5 mm, the image becomes hardly blurred.
[0020]
The amount of particles 13 dispersed on the undercoat layer 12 and included in the undercoat layer 12 and the amount of particles 13 included in the coating material to be applied, that is, the sprayed weight per unit area of the board 10 is 1 to 200 g per unit area of the board. / M ² is preferable, and 10 to 70 g / m ² is more preferable. This is because if the amount of the particles 13 is less than 1 g / m ² per unit area of the board, moisture flows and becomes inconvenient. On the other hand, if it exceeds 200 g / m ² , the blur of the paint does not spread.
[0021]
Next, moisture is adhered to the coated surface of the board 10 where the undercoat layer 12 is dried so that the amount of adhesion per unit area becomes substantially constant, and the substrate 10 is made wet. The amount of moisture adhering at this time is preferably 5 to 120 g / m ² , more preferably 50 to 70 g / m ² . When the amount of water adhering is less than 5 g / m ² , the formation of a blurred region due to paint smearing becomes insufficient at the time of coating using paint droplets, which will be described later, and the amount of water adhering is more than 120 g / m ^2. This is because the paint flows down from the board 1.
[0022]
The method for adhering water is arbitrary, but water is applied by a spraying method using a spray gun 23 shown in FIG. 3, a flow coater, or the like so that the entire painted surface of the board 10 is evenly wetted as much as possible. An application method for adhesion is conceivable.
[0023]
Next, a predetermined number of paint drops of paint of the first color that can be diluted with water are attached to the surface of the board 10 in a wet state to form a large number (a plurality) of irregularly shaped coating areas on the surface of the board 10. The water-dilutable paint refers to a paint that can be diluted with water and whose fluidity is enhanced by the water dilution, such as a water-soluble paint, an emulsion paint, and a water-dispersible paint. Further, this water-dilutable paint has a color different from that of the paint used for the base coating.
[0024]
The particle size of the first color paint droplets is, for example, 0.01 to 5 mm. The paint droplet may have a larger diameter. The coating method may be any method as long as it becomes paint droplets, but generally spray coating, for example, coating using a coating nozzle 25 as shown in FIG. 4 is suitable.
[0025]
The adhesion area of the first color paint droplets supplied as described above to the surface of the board 10 in the wet state maintains substantially the coating concentration at the time of supply at the center and adheres to the board 10 at the periphery. It is lightly diffused over a predetermined range while being mixed with water, and the boundary line with the base (undercoat layer) becomes ambiguous. That is, as shown in FIG. 5, the irregular coating region 16 (paint adhesion region) with the paint droplets is in a shaded state, and a blur region 16 a in which blur is applied to the peripheral portion is formed.
[0026]
Next, the board 10 in such a first-color blurred coating state is heated in a paint baking tank 26 (see FIG. 4) for a predetermined time to be forcibly dried. Of course, natural drying in a stable environment may be used.
[0027]
Next, in the same manner as described above, after the moisture is attached on the painted surface of the board 10 so that the amount of adhesion per unit area is almost constant, the surface of the wet board 10 is wetted. A water-dilutable paint drop of a second color different in color from the first color is attached to form a large number (a plurality) of irregularly coated areas on the surface of the board 10. At this time, the particle size of the paint droplet is, for example, 0.01 to 5 mm. The paint adhering area on the board 10 keeps the concentration at the time of supply at the central part, and in the peripheral part it is mixed with the water adhering to the board 10 and diffuses lightly over a predetermined range to blur. It becomes a state. Therefore, for example, as shown in FIG. 6, a coating region 17 (paint adhesion region) having a blur region 17a in the peripheral portion thereof is formed.
[0028]
Next, the board 10 coated with the second color is forcibly dried by heating for a predetermined time by means similar to the baking tank 26 (see FIG. 4) for baking the paint.
[0029]
In this embodiment, as shown in FIG. 5 and FIG. 6, the water-dilutable paint droplets diffuse on the wet-painted board 10, and the boundary line with the lower paint layer 12 becomes ambiguous, resulting in an irregular shape. Since the coating areas 16 and 17 are in a state where the peripheral portions thereof are blurred, a large number of irregularly shaped coating areas 16 and 17 have natural color shades and should be applied with excellent design. Can do.
[0030]
In addition, after the surface of the board 10 is undercoated with at least one color paint, a plurality of paint droplets having different colors from the undercoat layer are attached to the surface of the undercoat layer 12 in a state where moisture is adhered to the surface. Since the blurred region 16a in which the paint is diffused is formed in the periphery of the coating region 16 having an indefinite shape, the background color and the light paint color are mixed in the blurred region 16a. Can be painted.
[0031]
In addition, a plurality of paint droplets having different colors are applied to the surface of the board 10 on the previously painted area 16 at a predetermined timing (the next paint droplet may be attached before the surface is completely dried). A paint drop of different colors is attached to form the next coating region 17, and the plurality of colors of paint diffuse in the periphery of a plurality of irregularly shaped coating regions 16 and 17 (paint adhesion region). Since the regions 16a and 17a are formed, it is possible to obtain a delicate color that reflects not only the background color but also the mutual paint color in the blurred region.
[0032]
Furthermore, the water-dilutable paint droplets supplied onto the lower ground of the board 10 in a wet state are made to be sufficiently larger than the spray droplet diameter of a normal spray method and scattered to make a sharp and elegant coating. The state can be obtained.
[0033]
In FIG. 2, the surface of the board 10 is previously provided with an uneven pattern having an uneven pitch L of 50 mm or less and a height d from the valley bottom to the top of the unevenness of 0.3 mm or more. A plurality of painted portions including the regions 16a and 17a and the uneven surface shape (undulated state) of the board 10 combine to obtain a more natural pattern shape and obtain a magnificent painted surface. By the way, when the height d from the valley bottom to the top of the unevenness is less than 0.3 mm or the pitch L of the unevenness exceeds 50 mm, the pattern of the painted area by the paint droplets is too wide and mixed with other colors. In some cases, the design tends to deteriorate due to color mixing. Therefore, it is preferable that the pitches and depths of the concaves and convexes are in the above ranges so that such a phenomenon does not occur.
[0034]
In the above example, the underlying layer is the single color undercoat layer 12, but it may be a multicolor undercoat layer. In addition, when the undercoating is performed, the surface of the board 10 is preliminarily moistened with water (for example, water droplets are sprayed on the cured and hardened board to wet the surface), and the surface is then primed with a paint that can be diluted with water. That is, the surface is applied with a paint containing particles having a particle size of 0.01 to 5 mm to form an undercoat layer, or immediately after the board surface is applied with the paint, the surface of the board is 0.01 to 5 mm. The undercoat layer may be formed by spraying particles having a particle size and then overcoating with a paint to form a paint layer having color unevenness (color shading) corresponding to the uneven shape of the board surface. In this way, it is possible to obtain a high-quality coating appearance that reflects the color, shading, blurring, and the like of the undercoat layer and the blurred coating region formed in irregular large and small spots on the undercoat layer.
[0035]
【The invention's effect】
According to the present invention, a plurality of paint droplets of a paint that can be diluted with water after the moisture is attached to the surface of the board that has been primed as a coating film containing particles having a particle size of 0.01 to 5 mm and before the surface is dried. Is attached to the surface, forming a blurred area where paint is diffused in the periphery of a plurality of irregularly shaped paint adhering areas, so that a large number of irregularly shaped painted areas have natural color shading, and design characteristics Excellent coating can be performed.
[0036]
In addition, if a blur area is formed by diffusing a plurality of paint droplets with different colors from the base layer around the irregular paint adhesion area, the base color and the light paint color are mixed in the blur area. This makes it possible to paint more naturally and with better design.
[0037]
Further, before the surface of the painted area where a plurality of paint droplets of different colors are applied first is completely dried, the next paint droplet is sequentially adhered to the surface, and the peripheral areas of the plurality of irregularly shaped paint adhesion areas are If a blur area where paints of a plurality of colors are diffused to each other is formed, it is possible to obtain a subtle hue reflecting the background color and the mutual paint color in the blur area.
[0038]
In addition, if an uneven pattern with an uneven pitch of 50 mm or less and a height from the valley bottom to the top of the unevenness of 0.3 mm or more is attached to the board surface in advance, the undercoat layer may be colored or shaded, It is possible to obtain a more natural and elegant painted surface by naturally forming a blurred painted region corresponding to the uneven shape on the painted part.
[Brief description of the drawings]
FIG. 1 is a sectional view of a building material board according to the present invention.
FIG. 2 is a cross-sectional view of a building material board according to the present invention.
FIG. 3 is an explanatory diagram of a method of spraying water on a building material board using a spray gun.
FIG. 4 is an explanatory diagram of a method for painting a building material board according to the present invention.
FIG. 5 is an explanatory diagram of a coating state (in the case of a single color) in blur coating according to an embodiment.
FIG. 6 is an explanatory diagram of a coating state (in the case of multiple colors) in blur coating according to an embodiment.
[Explanation of symbols]
10: Building material board 11: Board body 12: Undercoat layer (underlayer)
13: Particles 16, 17: Paint area (paint adhesion area)
16a, 17a: Blur area 23: Water jet nozzle 25: Paint nozzle 26: Baking tank

Claims (4)

(A) After the surface of the board is applied with a paint, particles having a particle size of 0.01 to 5 mm are sprayed on the surface of the board and further coated with a paint to form an undercoat layer.
(B) attaching moisture to the surface of the undercoat layer,
(C) A plurality of paint drops of water-dilutable paint different in color from the undercoat layer are attached to the surface;
(D) forming a blurred area in which paint is diffused in the periphery of a plurality of irregularly shaped paint adhesion areas;
A method of blur painting a building material board. (E) After coating the board surface with a paint containing particles having a particle size of 0.01 to 5 mm to form an undercoat layer,
(B) attaching moisture to the surface of the undercoat layer,
(C) A plurality of paint drops of water-dilutable paint different in color from the undercoat layer are attached to the surface;
(D) forming a blurred area in which paint is diffused in the periphery of a plurality of irregularly shaped paint adhesion areas;
A method of blur painting a building material board. On the surface, use a board with an uneven pattern with an uneven pitch of 50 mm or less in advance and a height from the bottom of the uneven valley to the top of 0.3 mm or more.
The building material board blur coating method according to claim 1, wherein the building material board is blurred. Moisture is previously attached to the board surface, and then the undercoat layer is formed.
The blur coating method for a building material board according to any one of claims 1 to 3, characterized in that:

Images