JP6830025B2 - Manufacturing method of painted building materials - Google Patents

Description

The present invention relates to a method for producing a painted building material.

In buildings such as houses, the surface side of exterior materials (and thus building materials) such as exterior wall materials and roofing materials may be painted for the purpose of improving design. Some exterior materials have a fine uneven pattern on the surface thereof. Patent Document 1 discloses a coating method when coating the surface of an exterior material having such an uneven pattern. In the coating method of Patent Document 1, a transparent paint containing a pigment is applied to the entire surface of the base material, and then the pigment in the paint is settled in a recess by utilizing the settling property of the pigment. Specifically, the pigment contained in the paint on the convex portion moves (settles) to the concave portion side, so that only the transparent layer is present on the convex portion. In this case, the ground color of the base material is exposed through the transparent layer in the convex portion, while the pigment is precipitated and the color of the pigment appears in the concave portion. Therefore, it is possible to add color contrast (for example, shading) between the concave portion and the convex portion, and as a result, it is possible to give a feeling of shading and improve the design.

Tokukousho 40-14990

However, in the coating method of Patent Document 1, since the ground color of the base material appears in the convex portion, there is a problem that the variation in coloring is lacking.

The present invention has been made in view of the above circumstances, and provides a method for producing a painted building material, which can improve the design by giving a feeling of shading and can enhance the variation of coloring. It is the main purpose.

In order to solve the above problems, the method for producing a painted building material of the first invention is a method for manufacturing a painted building material by painting a base material having irregularities on the surface thereof, and is a method for manufacturing a painted building material of the base material. A first coating step of applying an opaque first colored paint to the surface, a first drying step of forming a first coating layer on the surface of the base material by drying the first colored paint, and the first coating. A second coating step of applying a transparent or translucent second colored paint to the surface of the layer, and a second drying of forming a second coating layer on the surface of the first coating layer by drying the second colored paint. The second coating step is characterized in that a second colored coating material having a viscosity of 15 to 100 mPa · S is used.

According to the present invention, when a base material having an uneven surface is coated, an opaque first colored paint is first applied to the surface of the base material, and the applied first colored paint is dried. A first coating layer is formed on the surface of the base material. In this case, the surface of the first coating layer is formed with irregularities corresponding to the irregularities on the surface of the base material. Next, a transparent or translucent second colored paint is applied to the surface of the first coating layer, and the applied second colored paint is dried to form a second coating layer on the surface of the first coating layer. Will be done. In the second coating step, a second colored paint having a viscosity of 15 to 100 mPa · S is used. In this case, when the second colored paint is applied to the surface of the first coating layer having irregularities, the second colored paint is easily flowed from the convex portion to the concave portion on the surface of the first coating layer. Can be done. Therefore, the thickness of the second colored paint (and thus the thickness of the second coating layer) can be reduced on the convex portion and increased on the concave portion, and as a result, the second colored layer (or translucent colored layer) is formed. 2 It is possible to make the coating layer appear thin (light) on the convex portion and dark on the concave portion. Therefore, in this case, it is possible to add light and shade according to the unevenness of the first coating layer (and by extension, the base material), thereby giving a feeling of shading.

Further, since the second coating layer is transparent or translucent, while the first coating layer is an opaque coloring layer, the ground color of the base material does not appear on the surface of the second coating layer. Further, since the second coating layer is a transparent coloring layer (or a translucent coloring layer), in this case, the color obtained by combining the color of the first coating layer and the color of the second coating layer is the color of the second coating layer. It will appear as a surface color. Thereby, the surface color of the second coating layer can be determined by adjusting each color of the first coating layer and the second coating layer, and as a result, the variation of coloring can be enhanced. Therefore, from the above, it is possible to improve the design by giving a feeling of shading, and it is possible to increase the variation of coloring.

The method for producing a coated building material according to the second invention is characterized in that, in the first invention, the pigment contained in the first colored paint is a pigment having a lighter color than the pigment contained in the second colored paint. And.

According to the present invention, since the pigment of the first colored paint is a pigment having a lighter (lighter) color than the pigment of the second colored paint, the first coating layer formed by using the first colored paint is lighter. It can be a colored layer of color. Here, in the above-described configuration in which the second coating layer is a transparent coloring layer (or a translucent coloring layer), the smaller the thickness of the second coating layer, the more the color of the first coating layer appears on the surface of the second coating layer. It will be easier. For this reason, when the first coating layer is a light-colored colored layer, the portion of the second coating layer where the thickness is reduced, in other words, the portion on the convex portion of the first coating layer (and thus the base material) is a concave portion. Compared to the upper part, the light color of the first coating layer is more likely to appear on the surface of the second coating layer. As a result, it is possible to add more shades on the concave portion and the convex portion of the base material, and as a result, it is possible to give a more shaded feeling.

The method for producing a coated building material according to the third invention is characterized in that, in the second invention, the pigment of the first colored paint is a white pigment.

According to the present invention, since the pigment of the first coloring paint is a white pigment, the first coating layer can be a particularly pale white coloring layer. As a result, it is possible to further add shading on the concave portion and the convex portion of the base material, and as a result, it is possible to further give a feeling of shading.

In the method for producing a coated building material according to the fourth invention, in any one of the first to third inventions, in the first coating step, the first colored paint having a viscosity of 40 mPa · S or more is used. It is a feature.

According to the present invention, in the first coating step, a paint having a viscosity of 40 mPa · S or more is used as the first colored paint. In this case, when the first colored paint is applied to the surface of the base material, the first colored paint can be prevented from flowing from the convex portion to the concave portion on the surface of the base material. The thickness (and thus the thickness of the first coating layer) can be made relatively uniform on each of the concave portion and the convex portion. Therefore, it is possible to easily form irregularities on the surface of the first coating layer according to the irregularities on the surface of the base material. As a result, the thickness of the second coating layer is made smaller on the convex portion of the first coating layer and larger on the concave portion, thereby giving a shade on the concave portion and the convex portion to give a feeling of shading. The effect can be surely obtained.

A vertical sectional view showing an outer wall material. The figure for demonstrating the painting method.

Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. Note that FIG. 1 is a vertical cross-sectional view showing the outer wall material. In FIG. 1, for convenience, the thickness of the coating layer is shown to be larger than the actual thickness.

As shown in FIG. 1, the outer wall material 10 is a rectangular flat plate-shaped base material 11, a first coating layer 12 formed on the surface of the base material 11, and a first coating layer 12 formed on the surface of the first coating layer 12. 2 The coating layer 13 is provided. The base material 11 is made of a ceramic siding board, and a large number of fine irregularities (concavo-convex patterns) are formed on the surface (base surface) thereof. As the base material 11, it is not always necessary to use a ceramic siding board, and other ceramic materials such as an extruded cement board and ALC may be used. Further, a wood-based material such as plywood, a resin-based material such as vinyl chloride, and a metal material such as a stainless steel plate may be used. The outer wall material 10 corresponds to a painted building material.

The first coating layer 12 is formed by applying an opaque first colored paint 16 to the surface of the base material 11. The first coloring paint 16 contains a resin liquid (resin component) and a pigment. In this case, as the resin liquid, for example, a resin liquid containing an acrylic resin, a urethane resin, a polyester resin, a silicon resin, an alkyl resin, or the like can be used. Further, as the pigment (coloring pigment), pigments such as white, gray (gray), blue, red, and light blue can be used. However, it is preferable to use a pigment having a lighter (lighter) color than the pigment of the second coloring paint 17, which will be described later, and more preferably a white pigment. As described above, since the first coating layer 12 is formed by using the opaque first coloring paint 16, the first coating layer 12 is formed as an opaque coloring layer.

The second coating layer 13 is formed by applying a transparent second colored paint 17 to the surface of the first coating layer 12. The second colored paint 17 is a color clear paint containing a resin liquid (resin component) and a pigment. As the resin liquid, a resin liquid containing an acrylic resin, a urethane resin, a polyester resin, a silicon resin, an alkyl resin, or the like can be used as in the case of the first colored paint 16. Further, as the pigment (coloring pigment), a pigment such as beige, gray (gray), or brown can be used. However, preferably, as the pigment, it is preferable to use a pigment having a darker color than the pigment of the first coloring paint 16. As described above, since the second coating layer 13 is formed by using the transparent second colored coating material 17, the second coating layer 13 is formed as a transparent colored layer.

As the second coloring paint 17, it is not always necessary to use a transparent one, and a translucent one may be used.

The first coating layer 12 and the second coating layer 13 are formed by, for example, spray coating. However, the coating method is not limited to spray coating, and other methods such as roll coating may be used. Further, the outer wall material 10 has a two-layer structure in which only two coating layers, the first coating layer 12 and the second coating layer 13, are formed.

Next, a coating method (coating procedure) for coating the base material 11 will be described with reference to FIG. FIG. 2 is a diagram for explaining such a coating method.

When painting the base material 11, for example, the base material 11 is laid down on a belt conveyor (placed on the belt conveyor). In this case, the base material 11 is laid on the belt conveyor with its surface facing upward (see FIG. 2A).

At the time of painting, first, a first painting step (first coating step) of applying the first colored paint 16 to the surface of the base material 11 is performed. In this step, the first colored paint 16 having a viscosity of 40 mPa · s or more is used. In this case, when the first colored paint 16 is applied to the surface of the base material 11, the first colored paint 16 can be prevented from flowing from the convex portion to the concave portion on the surface of the base material 11. Therefore, as shown in FIG. 2B, the thickness t1 of the first colored paint 16 on the concave portion and the thickness t2 of the first colored paint 16 on the convex portion on the surface of the base material 11 are relatively uniform ( In other words, it is possible to make it easier (to a relatively close size). In this case, since the first colored paint 16 is applied with a relatively uniform thickness over the entire surface of the base material 11, the surface of the first colored paint 16 is made uneven according to the unevenness of the surface of the base material 11.

Next, a first drying step of drying the first colored paint 16 applied to the surface of the base material 11 is performed. In this step, the base material 11 is placed in a drying furnace and the first colored paint 16 is dried. By this step, the water contained in the first colored coating material 16 is removed and the coating material 16 is solidified, and as a result, the first coating layer 12 is formed on the surface of the base material 11. Further, the surface of the first coating layer 12 is formed with irregularities corresponding to the irregularities on the surface of the base material 11.

Next, a second coating step (second coating step) of applying the second colored paint 17 to the surface of the first coating layer 12 is performed. In this step, the second colored paint 17 having a viscosity of 15 to 100 mPa · s is used. In this case, when the second colored paint 17 is applied to the surface of the first coating layer 12, the second colored paint 17 can easily flow from the convex portion to the concave portion on the surface of the first coating layer 12. it can. Therefore, as shown in FIG. 2C, the thickness t3 of the second colored paint 17 on the concave portion can be made larger than the thickness t4 of the second colored paint 17 on the convex portion (t3> t4). ).

By the way, since the viscosity of the second colored paint 17 is 15 mPa · s or more, the second colored paint 17 is made easy to flow from the convex portion to the concave portion, but the predetermined thickness is reached on the convex portion. The second colored paint 17 can be retained. Therefore, the second colored paint 17 can be reliably applied over the entire surface of the first coating layer 12.

Further, by adjusting the viscosity of the second colored paint 17 within the above numerical range, it is possible to adjust the magnitude of each thickness t3 and t4 of the second colored paint 17. Specifically, if the viscosity of the second colored paint 17 is reduced, the second colored paint 17 can more easily flow from the convex portion to the concave portion on the surface of the first coating layer 12. Therefore, in this case, on the concave portion. The thickness t3 of the second colored paint 17 can be made larger, and the thickness t4 of the second colored paint on the convex portion can be made smaller. That is, in this case, the difference (t3-t4) between the thicknesses t3 and t4 can be made larger.

On the other hand, if the viscosity of the second colored paint 17 is increased, it becomes difficult for the second colored paint 17 to flow from the convex portion to the concave portion on the surface of the first coating layer 12, so that in this case, the second colored paint 17 is on the concave portion. The thickness t3 of the colored paint 17 can be made smaller, and the thickness t4 of the second colored paint on the convex portion can be made larger. That is, in this case, the difference (t3-t4) between the thicknesses t3 and t4 can be made smaller. By adjusting the viscosity of the second colored paint 17 in this way, it is possible to adjust the respective thicknesses t3 and t4 of the second colored paint 17.

Next, a second drying step of drying the second colored paint 17 applied to the first coating layer 12 is performed. In this step, as in the first drying step, for example, the base material 11 is placed in a drying furnace to dry the second colored paint 17. When the second colored paint 17 is solidified by this step, the second coating layer 13 is formed on the surface of the first coating layer 12.

Here, as described above, the second colored paint 17 is applied so that its thickness is large on the concave portion on the surface of the first coating layer 12 and small on the convex portion in the previous step (second coating step). Therefore, the thickness of the second coating layer 13 formed by the main drying step is similarly large on the concave portion and small on the convex portion. Specifically, the thickness of the second coating layer 13 is t3 on the concave portion and t4 on the convex portion (t3> t4), which is the same as the thickness of the second colored paint 17.

As described above, since the thickness of the second coating layer 13 is large on the concave portion and small on the convex portion, the second coating layer 13 composed of the transparent colored layer is thick on the concave portion and thin (light) on the convex portion. You will be able to see it. Therefore, in this case, it is possible to add shading according to the unevenness of the first coating layer 12 (and by extension, the base material 11), thereby giving a feeling of shading.

Further, as described above, by adjusting the viscosity of the second colored paint 17, the thickness t3 of the second colored paint 17 on the concave portion (that is, the thickness t3 of the second coating layer 13) and the second on the convex portion. Since it is possible to adjust the thickness t4 of the two colored paint 17 (that is, the thickness t4 of the second coating layer 13), in this case, the viscosity of the second colored paint 17 is adjusted to perform the second coating. By adjusting the respective viscosities t3 and t4 of the layer 13, it is possible to adjust the degree of shading (difference in shading) of the second coating layer 13. Specifically, by reducing the viscosity of the second colored paint 17 and increasing the difference (t3-t4) between the thicknesses t3 and t4 of the second coating layer 13, the degree of shading of the second coating layer 13 can be increased. It can be made larger. Further, the degree of shading of the second coating layer 13 is reduced by increasing the viscosity of the second colored coating material 17 and reducing the difference (t3-t4) between the thicknesses t3 and t4 of the second coating layer 13. Is possible.

The viscosity of the second colored paint 17 is preferably 15 to 100 mPa · s, more preferably 15 to 100 mPa · s, in order to appropriately add light and shade (contrast) in the second coating layer 13 (not too large and not too small). Is preferably 25 to 50 mPa · s.

According to the configuration of the present embodiment described in detail above, the following excellent effects can be obtained.

By coating the base material 11 having irregularities by the coating method described above, it is possible to give a feeling of shadow. Further, while the second coating layer 13 is a transparent coloring layer, the first coating layer 12 is an opaque coloring layer, so that the ground color of the base material 11 is on the surface of the second coating layer 13. It never appears. Further, since the second coating layer 13 is a transparent colored layer, in this case, the color obtained by combining the color of the first coating layer 12 and the color of the second coating layer 13 is the surface of the second coating layer 13. It will appear as a color. As a result, the surface color of the second coating layer 13 can be determined by adjusting the colors of the first coating layer 12 and the second coating layer 13, and as a result, the variation in coloring can be enhanced. Therefore, from the above, it is possible to improve the design by giving a feeling of shading, and it is possible to increase the variation of coloring.

Further, by making the pigment contained in the first colored paint 16 a lighter (lighter) pigment than the pigment contained in the second colored paint 17, the first coating layer formed by using the first colored paint 16 is formed. 12 can be a light-colored colored layer. In this case, the portion of the second coating layer 13 whose thickness is reduced, that is, the portion on the convex portion on the surface of the first coating layer 12 (and thus the base material 11), is compared with the portion on the concave portion. The pale color of the first coating layer 12 tends to appear on the surface of the second coating layer 13. For this reason, it is possible to add more shading on the concave portion and the convex portion of the base material 11, and as a result, it is possible to further give a feeling of shading.

Further, by making the pigment of the first coloring paint 16 white, the first coating layer 12 can be made a particularly pale white coloring layer. As a result, it is possible to further add shading on the concave portion and the convex portion of the base material 11, and as a result, it is possible to further give a feeling of shading.

The present invention is not limited to the above embodiment, and may be implemented as follows, for example.

-In the above embodiment, the first colored paint 16 has a viscosity of 40 mPa · s or more, but the first colored paint 16 does not necessarily have to have such a viscosity. For example, when the unevenness of the surface of the base material 11 is large (in other words, the depth of the concave portion is deep), when the first colored paint 16 is applied to the surface of the base material 11, the first colored paint 16 is convex. Since it is easy to flow from the portion side to the recess side, in such a case, it is not necessary to use the first colored paint 16 having a viscosity in the above range. That is, even if a first colored paint 16 having such a viscosity is not used, unevenness corresponding to the unevenness of the surface of the base material 11 is formed on the surface of the first colored paint 16.

-In the above embodiment, the present invention is applied to the outer wall material 10 as a building material, but the present invention may be applied to other building materials such as an inner wall material and a roof material. The present invention can be applied regardless of the type of building material as long as the base material having irregularities on the surface (building base material) is coated.

Hereinafter, the present invention will be described with reference to specific examples, but the present invention is not limited to the following examples.

As a base material, a ceramic siding board was used. Many fine irregularities are formed on the surface of this base material.

As the first colored paint, an enamel paint (manufactured by Nippon Paint) was used without dilution. Further, as the first coloring paint, a white paint containing a white pigment was used, and its viscosity was 100 mPa · s. This viscosity was measured at 20 ° C. using a B-type viscometer.

As the second colored paint, a color clear paint (manufactured by Nippon Paint) diluted at a dilution rate of 40 to 70% was used. Further, as the second coloring paint, a paint containing a gray pigment was used, and the viscosity thereof was 30 mPa · s. This viscosity was measured at 20 ° C. using a B-type viscometer.

When painting the base material 11, first, the first colored paint was spray-coated on the surface of the base material at a coating amount of 150 to 200 g / m2 (first coating step). Next, the applied first colored paint was dried in a drying oven under a temperature condition of 80 ° C. for 10 minutes (first drying step). Next, the second colored paint was sprayed onto the surface of the first coating layer formed by the above drying at a coating amount of 100 to 150 g / m2 (second coating step). Next, the applied second colored paint was dried in a drying oven under a temperature condition of 90 ° C. for 10 minutes (second drying step). As a result, the second coating layer was formed on the surface of the first coating layer, and the outer wall material was manufactured.

The surface of the manufactured outer wall material (second coating layer) is shaded according to the unevenness of the base material, thereby giving a feeling of shading. As a result, the design is improved.

Further, when the thicknesses of the first coating layer and the second coating layer were measured for the outer wall material after coating, the thickness of the first coating layer was 30 to 50 μm (t1) on the concave portion of the substrate, and the substrate was formed. It was 15 to 25 μm (t2) on the convex portion of. The thickness of the second coating layer was 25 to 40 μm (t3) on the concave portion of the base material and 3 to 10 μm (t4) on the convex portion of the base material.

10 ... Exterior wall material as a painted building material, 11 ... Base material, 12 ... First coating layer, 13 ... Second coating layer, 16 ... First colored paint, 17 ... Second colored paint.

Claims (3)

It is a manufacturing method of a painted building material that manufactures a painted building material by painting a base material having an uneven surface.
A first coating step of applying an opaque first colored paint to the surface of the base material, and
A first drying step of forming a first coating layer on the surface of the base material by drying and solidifying the first colored paint.
A second coating step of applying a transparent or translucent second colored paint to the surface of the first coating layer, and
A second drying step of forming a second coating layer on the surface of the first coating layer by drying and solidifying the second colored coating material is provided.
In the first coating step, as the first coloring paint, a paint having a viscosity of 40 mPa · S or more is used.
A method for producing a painted building material, which comprises using a second colored paint having a viscosity of 15 to 100 mPa · S in the second painting step. The first coloring paint contains a resin liquid and a pigment, and comprises.
The second coloring paint contains a resin liquid and a pigment, and comprises.
The method for producing a coated building material according to claim 1 , wherein a pigment having a lighter color than the pigment of the second colored paint is used as the pigment of the first colored paint. The method for producing a coated building material according to claim 2, wherein the pigment of the first coloring paint is a white pigment.

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