JP3194839B2 - Surface patterning method for fiber reinforced cement board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for texturing a surface of a fiber reinforced cement board.

[0002]

2. Description of the Related Art Fiber-reinforced cement boards are very widely used as building boards for exterior walls. If these fiber reinforced cement boards are left as they are, the surface is smooth and the ground color is gray white to gray black and poor in design, so that various colors or uneven patterns are applied to the surface. By the way, a lysine paint is known as a paint finish for an outer wall composed of these fiber reinforced cement boards and the like. This lysine paint is generally mixed with fine sand in the paint and spray painted.
In combination with the design of the uneven pattern on the outer wall surface, the fine sand mixed is generally preferred as having a matt high-grade design that emerges on the surface.

[0003]

However, this lysine paint is difficult to produce in a factory production due to the nature of the paint such as sand particles to be blended and the appearance of the finished appearance. There is a problem that I cannot get. Therefore, at present, fiber reinforced cement boards having such a surface finish as lysine paint finish have not been implemented in factory production.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a surface pattern of a fiber-reinforced cement board material capable of producing a high-quality lysine-like surface makeup in a factory production rather than on-site painting. The purpose is to obtain a mounting method.

[0005]

That is, in the method of patterning the surface of a fiber-reinforced cement board according to the present invention, a sealer coating is applied to the surface of the fiber-reinforced cement board, and colored sand particles are uniformly dispersed before the coating film is dried and hardened. Then, apply a desired color to the surface of the scattered sand particles fixed by the sealer, and blow off the paint by spraying air onto the surface of the coated paint before the paint is dried and hardened. The method is characterized in that a part or the whole is exposed, and then the paint is dried.

In a second aspect of the present invention, a sealer coating is performed by a roll coater only on a convex pattern surface of a fiber reinforced cement plate material having an irregular pattern on its surface, and colored sand particles are uniformly dispersed before the coating film is dried and hardened. Then, apply any color to the entire surface of the fiber reinforced cement board material and blow off the paint by spraying air on the painted surface before drying and curing, and part or all of the fixed colored sand particles. And then drying the paint.

In a third aspect of the present invention, a sealer coating is applied to the surface of the fiber-reinforced cement board, and before the coating film is dried and hardened, the colored sand particles are uniformly scattered and adhered and dried. Grind the pattern, apply any color to the surface of the processed plate material, blow out the paint by blowing air before drying and curing, exposing a part or all of the fixed colored sand particles, and then drying the paint It is characterized by the following.

[0008]

The lysine paint mixes fine sand particles in the paint and sprays the same to make the sandy surfaces uneven on the surface of the paint film, thereby forming a matte surface. In order to obtain this appearance, in the present invention, the surface of the fiber reinforced cement board obtained by any method such as extrusion molding, papermaking, dry manufacturing, casting, etc. is coated with a sealer, and before the coating is dried and hardened. These sand particles are adhered and fixed by uniformly spraying the colored sand particles and curing the sealer coating. As a result, an uneven ground surface is formed on the surface of the fiber reinforced cement board by sand grains giving a lysine-like appearance.

This fiber reinforced cement board is provided with a lysine-like base surface but is not yet colored. Therefore, the surface of the fiber reinforced cement board is colored by painting in an arbitrary color. After this coating, before the coating is dried and hardened, air is blown to the coating surface to blow off the coating to expose a part or all of the fixed colored sand particles. By this step, the surface of the sand grains has no or thin coating film, and the cement base portion has a lysine-like high-grade appearance to which the paint adheres. Then, the paint is dried to produce a product.

In the case of the second invention, a cosmetic in which the uneven pattern and the lysine paint are combined is obtained, and the roll coater is applied only to the convex surface of the fiber reinforced cement plate material whose surface has been previously formed with the uneven pattern by die or grinding. Before the paint is dried and hardened, the colored sand particles are evenly dispersed and the sealer coating is cured to adhere and fix these sand particles. At this time, the colored sand particles are selectively adhered and fixed only to the surface of the convex portion, the surface of the convex portion has a lysine-like ground, and the surface of the concave pattern has no ground.

The colored coating is applied to the fiber-reinforced cement board in the steps of coating and spraying air in the same manner as in the above invention. According to this method, the surface of the sand on the surface of the convex portion has no or little paint, and the paint is applied to the cement base portion, and the surface of the concave pattern has a separately applied surface makeup with the paint applied. And the decorative cement board which has the pattern of the non-ground where the convex part surface is a lysine base ground and the concave part surface is smooth among the concave and convex patterns. In the paint application step prior to the air injection step, sealer coating is performed again before the paint application as needed.

[0012] The method of the third invention relates to a decorative method of a decorative cement board having a pattern of a plain surface having a convex surface of lysine-finished ground and a smooth concave surface as in the second invention.
Similar to the invention of the invention, the surface of the cement plate is uniformly ground with a lysine-like ground by a sealer coating, and then the surface of the cement board is ground to an arbitrary pattern to form an uneven pattern. Thereafter, as in the second invention, the colored coating is performed in the steps of paint application and air injection.

In the third aspect of the present invention, the design effect obtained by grinding the surface of the fiber reinforced cement board by grinding is a tile joint or a brick-like joint groove pattern. Further, in the paint application step prior to the air injection step, sealer coating is performed as necessary, which is the same as the above-described invention.

[0014]

Next, an embodiment of the present invention will be described. 1 to 5 are process diagrams for explaining an embodiment of the present invention.

[Example 1] By a fourdrinier method, a thickness of 20 mm,
A fiber-reinforced cement board 1 having a width of 450 mm and a length of 3,000 mm was molded and cured to obtain a plain fiber-reinforced cement board. As shown in FIG. 1, this fiber reinforced cement board 1 is transferred by a conveyor 2 and an acrylic emulsion sealer 4 is coated on the surface thereof by a coating apparatus 3 of a flow coater and a roll coater.
It is applied uniformly at 50 g / m ² and then the average particle size is 1 mm with a knurled roll 5 on the surface before the sealer 4 is dried and cured.
Of colored sand particles 6 was uniformly sprayed at a ratio of 500 g / m ² . Next, the sealer was dried and hardened by passing through the heating unit 7, and the scattered sand particles 6 were adhered and fixed. Next, as shown in FIG. 2, the same acrylic emulsion-based sealer 9 'and macril emulsion paint 9 are applied to the surface from a flow coater 8'8.
Immediately thereafter, the sealer 9 'and the paint 9 are left on the portion 1A without sand particles by the air blower 10 as shown in FIG. The air pressure was adjusted by adjusting the injection pressure to remove the air. Then, the sealer 9 'paint 9 is dried,
Got the product.

[Example 2] By the Fourdrinier method, a thickness of 20 mm,
A fiber-reinforced cement board 1 having a width of 450 mm and a length of 3,000 mm is formed, and while it is not yet cured, the surface thereof is pressed by a flat plate press as shown in FIG.
Each of the two types of uneven patterns of B was applied by a flat plate press. Thereafter, curing and curing were performed to obtain a plain fiber-reinforced cement board.

The fiber reinforced cement board 1 is transported by a conveyor 2 and an acrylic emulsion sealer 4 is uniformly applied on the surface only by a roll coater at 50 g / m ² to only the convex surface.
Next, before the sealer 4 is not dried and hardened, 500 g / m ² of colored sand particles 6 having an average particle diameter of 1 mm
Was sprayed uniformly. Next, after the scattered sand particles on the surface of the plate material 1 were removed by an air blow or a suction device, the particles were sent to the heating unit 7 to dry and harden the sealer, and the scattered sand particles 6 were adhered and fixed only to the surface of the convex pattern. Next, as shown in FIG. 2, an acrylic emulsion-based sealer 9 'and an acrylic emulsion-based paint 9 are applied to the surface by a flow coater 8'8. Immediately thereafter, an air blower 10 is used to coat the surface as shown in FIG. Sealer 9 'on cement base 1A
The spray pressure was adjusted so that the paint 9 remained, and the paint on the surface portion 6A of the attached sand particles 6 was removed.
Thereafter, the sealer 9 'and the paint 9 were dried to obtain a product.

Example 3 A fiber reinforced cement board 1 having colored sand particles 6 adhered and fixed to the surface was obtained in the same manner as in Example 1.
On the surface, as shown in FIG.
Brick-like joint groove patterns 11B, 11B having a depth of 4 mm, a vertical length of 50 mm and a horizontal width of 150 mm were ground. Thereafter, sealer coating, top coating and air blowing were performed in the same manner as in Example 2, and the coating was dried to obtain a product.

Fiber reinforced cement board 1 obtained in Examples 1 to 3
When the surface of Example 1 was observed, the surface of Example 1 had a smooth decorative surface entirely made of lysine, and Examples 2 and 3 had a concave portion of a natural stone-like irregular pattern or a brick joint-like irregular pattern with no ground. The convex pattern surface has a very high quality appearance configuration having a lysine plain ground as a base, and both of which are based on a lysine plain ground.

[0020]

As described above, according to the method of the present invention, it is possible to mass-produce a lysine-like decorative surface obtained by spray-coating a paint containing sand particles in a factory production manner, and the conventional construction is troublesome. Lysine-like decorative surface can be obtained in large quantities and at low cost. Also, when the method of the present invention is carried out, the coating apparatus which has been conventionally used can be used as it is, so that there is an effect that the method is easy to carry out.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a sealer coating and sand particle dispersing step of the present invention.

FIG. 2 is an explanatory view showing a painting and air blowing process of the present invention.

FIG. 3 is an enlarged cross-sectional view of the fiber reinforced cement board after the air blow of the present invention is performed.

FIG. 4 is a cross-sectional view of a main part showing an example of a pressed pattern with surface irregularities according to the present invention.

FIG. 5 is a cross-sectional view of a main part showing an example of a surface uneven grinding pattern of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Unhardened fiber reinforced cement board 2 ... Conveyor 3 ... Coating equipment, such as a flow coater and a roll coater 4 ... Sealer 5 ... Knurl roll 6 ... Colored sand 7 ... Heating part 8 ... Flow coater 9 ... Paint 10 ... Air blower 11A … Natural stone-like irregularities 11B… Brick-like joint groove pattern

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) C04B 41/00-41/72 B05D 1/00-7/26

Claims (3)

(57) [Claims] 1. A sealer coating is applied to the surface of a fiber reinforced cement board, and before the coating film is dried and hardened, the colored sand particles are uniformly dispersed and adhered to the surface, and then dried, and then the surface of the dispersed sand particles fixed by the sealer is coated with an arbitrary color. Before the paint is dried and cured, the paint is sprayed with air on the paint surface to blow off the paint to expose a part or all of the fixed colored sand particles,
After that, the paint is dried. 2. A sealer coating is applied by a roll coater only on the convex pattern surface of the fiber reinforced cement plate material having an uneven pattern on its surface, and colored sand particles are uniformly dispersed and adhered before the coating film is dried and hardened. Drying, then apply an arbitrary color to the entire surface of the fiber reinforced cement board, and blow off the paint by blowing air to the painted surface before the paint is dried and hardened to expose part or all of the fixed colored sand particles. And thereafter drying the paint. 3. A sealer coating is applied to the surface of the fiber-reinforced cement board, and before the coating film is dried and hardened, the colored sand particles are uniformly scattered and adhered and dried. Then, applying an arbitrary color to the surface of the processed plate material, blowing air before the paint is dried and hardened to blow off the paint to expose a part or all of the fixed colored sand particles, and then dry the paint. A surface patterning method for a fiber reinforced cement board material, characterized by comprising: