JP3741540B2 - How to make a fiber-reinforced cement board - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a surface patterning method for a fiber-reinforced cement board.
[0002]
[Prior art]
Fiber reinforced cement boards are very widely used as building materials for exterior walls. Since these fiber-reinforced cement boards are as they are, the surface is smooth and the ground color is gray-white to gray-black, and the design is poor. Therefore, various colors or uneven patterns are given to the surface.
[0003]
By the way, lysine coating is known as a coating finish of an outer wall composed of these fiber-reinforced cement boards and the like.
This lysine coating is generally applied by spraying fine sand particles in the paint, and combined with the uneven surface design on the outer wall surface, it has a high-class design with a matte appearance where the fine sand particles are raised on the surface It is generally preferred as a thing.
[0004]
[Problems to be solved by the invention]
However, this lysine paint is difficult to produce in a factory-productive manner due to the nature of the paint, such as the blended sand particles, and the appearance of the finished product. There is a problem that a feeling of feeling and a natural base material cannot be obtained.
[0005]
Further, in the past, fiber reinforced cement boards that have been subjected to such lysine coating, particularly surface decoration with a non-uniform distribution of sand particles, have not been implemented at the factory.
[0006]
In view of the above problems, the present invention produces a surface texture full of lysine-like luxury with high efficiency in terms of factory production rather than on-site painting, and further provides a natural texture by distributing sand grains unevenly. This was made for the purpose of obtaining a surface patterning method for a fiber-reinforced cement board material.
[0007]
[Means for Solving the Problems]
That is, according to the surface patterning method of the fiber-reinforced cement board material of the invention of the first aspect, the first sealer coating is performed on the surface of the fiber-reinforced cement board material that has been pressed after the plate making and primary cured and cured, and before the coating film is dried. Particulate matter is sprayed and adhered unevenly, and after the sealer coating is dried, the fiber-reinforced cement board is autoclaved, and then a second sealer is applied to the surface. is there.
[0008]
According to this method, a lysine spray-like appearance substrate is formed on the surface of the fiber-reinforced cement board by the particulate matter adhered and fixed to the first sealer paint in a non-uniform distribution, and further, the surface is colored to give a high-quality lysine tone. It is excellent in feeling and can be industrially implemented with a cosmetic appearance that is similar to a natural stone due to the uneven distribution of sand grains.
[0009]
In addition, the fiber reinforced cement board in the above uses what was obtained by arbitrary manufacturing methods, such as an extrusion method, a papermaking method, a dry-type manufacturing method, and a casting method.
According to the invention of claim 2, the press is a concavo-convex pattern press in the above invention, and after the entire top coat is dried, only the convex pattern surface is coated by a roll coater.
[0010]
According to this invention, since only the convex surface is selectively coated, lysine-like makeup having the uniqueness of the convex surface can be easily implemented in industrial production.
According to a third aspect of the present invention, in the above invention, the particulate matter is colored particles, and the entire top coat is a clear coating.
[0011]
According to the present invention, a complicated pattern is obtained by particulate matter having different colors, and the colored pattern of these particulate matter appears as an appearance by the clear coating of the surface. A stone-like appearance pattern can be obtained by industrial means.
[0012]
Here, clear coating includes colorless and transparent as well as colored and transparent.
According to a fourth aspect of the present invention, a color pigment is added to the blended material of the fiber reinforced cement board in each of the above inventions.
[0013]
According to this invention, since the base material itself is also colored, a more complex color combination is obtained in addition to the color of the colored particles attached to the surface, and as a result, a pattern closer to the appearance of a real natural stone is obtained. Is obtained by industrial means.
[0014]
【Example】
Next, examples of the present invention will be described.
In addition, as a manufacturing method of the fiber reinforced cement board of this invention, arbitrary manufacturing methods, such as an extrusion molding method, a papermaking method, a dry-type manufacturing method, a casting method, can be applied, but what is called a flow-on molding method is demonstrated below.
Example 1
As shown in FIG. 1, a cement slurry 3 was supplied onto a felt belt 2 equipped with a suction dewatering device 1, and a fiber-reinforced cement board 4 having a thickness of 20 mm and a width of 450 mm was made while suction dewatering.
[0015]
The fiber-reinforced cement board 4 was cut every 3,000 mm with a cutter 5 and pressed with a press board 6 to smooth the surface. This fiber-reinforced cement board 4 was primarily cured at room temperature for 12 hours.
[0016]
As shown in FIG. 2, the fiber reinforced cement board 4 is transferred by a conveyor 7 and a first coater 9 of acrylic emulsion system is uniformly applied to the surface by a flow coater 8 at 50 g / m ² , and then the first sealer is applied. while 9 is not cured and dried, the maximum particle size in a sand sprayer 10 which is disposed a baffle plate 10a is 2mm or less, the particulate matter 11 consisting of sand having an average particle size of ^{1mm 600g / m 2 ~300g / m} 2 range The baffle plate 10a was reciprocated as indicated by the arrows so as to have a non-uniform distribution.
[0017]
Next, the sealer was dried and cured, and the particulate matter 11 was adhered and fixed.
Then, high temperature high pressure curing was performed for 8 hours by an autoclave, and the strength of the fiber reinforced cement board 4 main body was expressed.
[0018]
Then, an acrylic emulsion-based second sealer coating was performed on the entire surface, and after drying, a top coating was further applied and dried to obtain a product.
Example 2
A fiber-reinforced cement board 4 having a thickness of 20 mm and a width of 450 mm was formed in the same manner as in Example 1, and a natural stone-like uneven pattern 11A (FIG. 3 (a)) as shown in FIGS. Two kinds of uneven patterns of a joint groove-like joint pattern 11B (FIG. 3 (b)) were added. Thereafter, primary curing was performed.
[0019]
As shown in FIG. 4, the fiber reinforced cement board 1 is transported by a conveyor 7, and an acrylic emulsion-based sealer 9 is uniformly applied to the surface of the convex portion by a roll coater 8a at 50 g / m ² on the surface. Before drying and hardening, sand particles 6 having the same particle diameter as in Example 1 were sprayed on the surface in a non-uniform dispersion state using a sand spreader 5.
[0020]
Next, the paint is dried and subjected to high temperature and high pressure curing by an autoclave to express the plate material strength. After the acrylic second sealer paint is applied to the entire surface using a flow coater as in Example 1, it is dried and further overcoated and dried. Only the surface of the convex part was colored and coated with a roll coater.
Example 3
In the same manner as in Example 1, a fiber reinforced cement board 4 after primary curing in which particulate matter 6 is adhered and fixed on the surface in a non-uniform distribution is obtained, and thereafter, high-temperature and high-pressure curing is performed by an autoclave as in Example 1 to increase the strength of the board. As shown in FIG. 5, a brick-like joint groove pattern 11d having a width of 10 mm, a depth of 4 mm, a length of 50 mm, and a width of 150 mm was ground on the surface.
[0021]
Next, sealer coating and top coating were applied to the entire surface of the fiber reinforced cement board, the coating was dried, and only the convex surface was colored and coated with a roll coater to obtain a product.
Example 4
A fiber reinforced cement board product that is coated with a sealer on the entire surface and colored with a roll coater only on the convex parts after router processing, as in Example 3, except that a coloring material with a pigment added to the compounding material of the fiber reinforced cement board is used. Got.
When the surface of the fiber reinforced cement board 1 obtained in Examples 1 to 4 was observed, Examples 1 and 2 were smooth surfaces with a mottled lysine base or a natural stone-like decorative surface, and Example 3 was natural stone. Of the concavo-convex pattern of the wind or the concavo-convex pattern of the brick joint, the concave pattern portion is flat, and the surface of the convex pattern has a very high-grade appearance configuration based on the lysine-tone ground, and Example 4 was ground. The color of the surface of the concave pattern and the color of the surface of the convex pattern have a contrast and have a more excellent appearance configuration. Furthermore, the non-uniform distribution of sand grains gives a more realistic texture.
[0022]
Moreover, when the fiber reinforced cement board of each Example was cut | disconnected and the surface part was expanded and observed, the particulate matter 11 adheres to the surface of the fiber reinforced cement board 4 with the 1st sealer 9 as typically shown in FIG. Further, it was observed that the surface was covered and firmly held by the second sealer 13 and the top coating 14.
[0023]
【The invention's effect】
As described above, according to the method of the present invention, a lysine-like makeup surface obtained by spraying a paint compounded with fine sand particles can be mass-produced in a factory production, and lysine has been troublesome in conventional construction. The decorative face can be obtained industrially in large quantities and at low cost.
[0024]
Further, the adhered particles are surely held on the surface of the fiber reinforced cement board by the sealer and the top coat, and therefore, the particles are not easily peeled off and have an effect of maintaining a good appearance over a long period of time.
[Brief description of the drawings]
FIG. 1 is a side view showing a manufacturing process of a fiber-reinforced cement board according to the present invention.
FIG. 2 is a side view showing a painting process of the present invention.
FIG. 3 is an explanatory cross-sectional view of an embodiment of a concavo-convex press according to the present invention, where (a) shows a natural stone-like concavo-convex pattern and (b) shows a brick joint concavo-convex pattern.
FIG. 4 is a side view showing another painting process of the present invention.
FIG. 5 is a side view showing a method for forming another uneven pattern according to the present invention.
FIG. 6 is an enlarged cross-sectional view showing the adhering state of particulate matter on the fiber-reinforced cement board of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 3 ... Compound raw material of fiber reinforced cement board 4 ... Made fiber reinforced cement board 9 ... First sealer 10 ... Sand spreader 11 ... Particulate matter 11a ... Natural stone-like uneven pattern 11b ... Brick-like joint groove Pattern 13 ... Second sealer 14 ... Top coat

Claims (4)

A first sealer coating is applied to the surface of the fiber reinforced cement plate material that has been pressed and primarily cured after plate making, and the particulate matter is non-uniformly dispersed and adhered before the coating film is dried. A method for making a fiber-reinforced cement board, in which a fiber-reinforced cement board material is cured by autoclave, and then a second sealer is applied to the surface, followed by further overcoating after drying. The method for applying a fiber-reinforced cement board according to claim 1, wherein the press is a concavo-convex pattern press, and the entire surface is overcoated and dried, and then only the surface of the convex pattern is applied by a roll coater. 3. The method for making a fiber-reinforced cement board according to claim 1 or 2, wherein the particulate matter is colored particles, and the entire top coat is a clear paint. The cosmetic method for a fiber-reinforced cement board according to claim 1, 2, or 3, wherein a coloring pigment is added to the compounding material of the fiber-reinforced cement board.

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