JP3753495B2 - Surface patterning method for fiber reinforced cement board - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fiber-reinforced cement board and a surface patterning method thereof.
[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 paint is known as a paint finish of the outer wall composed of these fiber-reinforced cement boards and the like.
This lysine paint is usually sprayed with fine sand mixed in the paint, and combined with the uneven surface design of the outer wall surface, it has a high-class design with a matte appearance that the mixed fine sand is raised on the surface It is generally preferred as a thing.
[0004]
[Problems to be solved by the invention]
However, this ricin paint is difficult to produce in a factory-productive manner due to the nature of the paint, such as sand particles, and the appearance of the finished product. There is.
[0005]
Therefore, in the past, the fiber-reinforced cement board having such a surface finish like a lysine paint finish has not been implemented so far in terms of factory production.
In addition, since it is spray coating, there is a problem that sand particles contained in the paint are scattered around the coating and the surroundings are seriously fouled, and the entire sand particles exposed on the coating film surface are securely fixed to the coating film. However, there was a problem that incompletely fixed sand particles may fall due to rubbing or the like.
[0006]
In view of the above problems, the present invention provides a fiber-reinforced cement board with a surface finish full of lysine-like luxury, and the surface of the fiber-reinforced cement board material that can be produced with high efficiency for factory production rather than on-site painting It was made for the purpose of obtaining a patterning method.
[0011]
[Means for Solving the Problems]
That is, in the method for surface-patterning a fiber-reinforced cement board according to the first aspect of the invention, the surface of the fiber-reinforced cement board is subjected to sealer coating immediately after primary curing and has residual heat during curing, and the coating film is dried. Prior to curing, the particulate matter is uniformly sprayed and adhered , dried and cured using the residual heat to adhere and fix the particulate matter , and then the fiber reinforced cement board material is cured and the strength of the fiber reinforced cement board material The sealer coating is dried and cured, and after a predetermined joint shape is cut, the entire surface is coated again with a sealer, dried, and then overcoated on the entire surface.
[0012]
That is, when a lysine-like surface pattern is applied to the surface of a fiber reinforced cement board obtained by an arbitrary method such as an extrusion method, a papermaking method, a dry method, or a casting method, the fiber reinforced cement plate is molded and then subjected to primary curing. Then, the surface is coated with a sealer while the residual heat is present, and the particulate matter is uniformly sprayed before the paint is dried and cured, and then the sealer coating is cured using the residual heat. As a result, the particulate matter is adhered and fixed, and at the same time, the heat is effectively utilized.
[0013]
And the uneven surface by the particulate matter which gives the lysine-like appearance is formed in the surface of a fiber reinforced cement board by the said process.
This fiber-reinforced cement board has a lysine-like ground surface but is not yet colored.
[0014]
Therefore, the fiber reinforced cement board is again cured by autoclave to increase the strength of the fiber reinforced cement board and to dry and cure the sealer coating.
After that, various colors are applied and colored.
[0015]
By this process, the surface of the fiber reinforced cement board has a lysine-like high-quality appearance in which fine particulate matter is uniformly dispersed.
[0017]
In addition to the inorganic particles such as colored sand particles, synthetic resin particles such as polystyrene beads and polyethylene beads can be used as the particulate matter.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described.
In addition, since it is more convenient to explain from a manufacturing method for convenience, it describes as follows.
[0019]
1 to 5 are process diagrams for explaining an embodiment of the present invention.
[Example 1]
A fiber reinforced cement board 1 having a thickness of 20 mm, a width of 450 mm, and a length of 3,000 mm was formed by a long net-making method, and subjected to primary curing with saturated steam.
[0020]
Next, the fiber reinforced cement board 1 with residual heat is taken out from the autoclave and transferred with a conveyor 2 as shown in FIG. 1, and an acrylic emulsion type sealer 4 is applied to the surface by a flow coater and roll coater coating device 3 at 100 g / m. It was uniformly applied at ^2, then as the sealer 4 is the ratio sand or polyethylene beads 6 of 100 g / m ² of an average particle size of 1mm in maximum particle diameter of 2mm or less by knurling roll 5 on the surface in less cured dry regular After spraying, the sealer was dried and cured using the residual heat, and the sand particles 6 were adhered and fixed.
[0021]
Thereafter, the fiber reinforced cement board 1 was subjected to main curing by an autoclave, and the same acrylic emulsion paint 8 was applied to the surface by a flow coater 7 as shown in FIG. 2 and dried in a drying furnace 9 to obtain a product.
[0022]
When the cross section of the product surface was observed, as shown in FIG. 3, the surface of the particulate material 6 of sand particles or polyethylene beads fixed by the sealer 4 was uniformly applied to the surface of the coating layer 8, and the coating layer 8 on the surface was coated with the coating. It was confirmed that the particulate matter 6 having a diameter larger than the film thickness was fixed in a uniformly dispersed state.
[Example 2]
A fiber-reinforced cement board 1 with a thickness of 20 mm, a width of 450 mm, and a length of 3,000 mm was formed by the long net paper making method, and a natural stone-like concavo-convex pattern 11A and brick as shown in FIG. Two kinds of concave / convex patterns of the joint-like joint groove pattern 11B were each applied by a flat plate press. The fiber reinforced cement board was subjected to primary curing with saturated steam in the same manner as in Example 1.
[0023]
The fiber reinforced cement board 1 with residual heat taken out from the autoclave is transferred by the conveyor 2, and the acrylic emulsion type sealer 4 is uniformly applied to the surface of the convex part by a roll coater on the surface at 100 g / m ² , and then the sealer 4 Before drying and curing, sand particles 6 having the same particle diameter as in Example 1 were uniformly sprayed on the surface with a knurling roll 5 so as to have a ratio of 100 g / m ² .
[0024]
Subsequently, the paint was dried using residual heat to remove the sand particles 6 scattered in the concave pattern on the surface of the plate 1, and then the main curing was performed by an autoclave as in Example 1.
Thereafter, as shown in FIG. 2, an acrylic emulsion paint 8 was applied to the surface by a flow coater 7 and dried in a drying furnace 9 to obtain a product.
[0025]
When the cross section of the product surface was observed, as shown in FIG. 5, the particulate matter 6 adhered only to the convex pattern 1A, and the appearance of the pattern was such that the particulate matter 6 did not adhere at all in the joint grooves.
[0026]
Further, it is observed that the central portion of the convex pattern 1A is uniformly coated on the surface of the particulate material 6 of sand particles or polyethylene beads fixed by the sealer 4 and has a lysine-like surface pattern due to the irregularities of the particulate material 6. It was.
[Comparative example]
A fiber reinforced cement board 1 having a thickness of 20 mm, a width of 450 mm, and a length of 3,000 mm was formed by the long net paper-making method in the same manner as in Example 1, and primary curing was performed by an autoclave.
[0027]
Next, the fiber reinforced cement board 1 was taken out from the autoclave, and was stored in the same manner as in Example 1 after storage until there was no residual heat.
When the time required for completion of Example 1 was compared with the method of the present invention, a time reduction of 30 minutes to 1 hour was obtained in the drying process.
Moreover, when the fiber reinforced cement board having the surface lysine-like surface pattern obtained in Examples 1 and 2 was constructed at an actual construction site, the construction period was shortened by 2 to 3 days compared to the lysin-like pattern on-site spraying construction. became.
[0028]
【The invention's effect】
As described above, according to the inventions of claims 1 and 2, the outer wall cosmetic construction, which conventionally required at least two to three days, can be performed only by attaching the fiber reinforced cement board, and the construction period is significantly shortened. Become. In addition, since the particulate matter giving a lysine-like appearance is completely surrounded by the coating film, the fixing state is uniformly stable, and therefore, it has an effect of preventing peeling due to abrasion.
[0029]
Further, according to the method of the invention of claim 3, a lysine-like decorative surface obtained by spraying a paint composition containing fine sand particles can be mass-produced in a factory production, and further, residual heat during primary curing is used. The sealer drying process can be shortened and the production efficiency can be improved.
[0030]
Furthermore, according to the invention of claim 4 or claim 5, it is possible to prevent various adverse effects due to irregularities caused by the particulate matter, in particular, breakage of the surface protective paper, and therefore, it is possible to facilitate storage and transportation.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a sealer coating and a particulate matter spraying process of the present invention.
FIG. 2 is an explanatory view showing a painting and drying process of the present invention.
FIG. 3 is an enlarged cross-sectional view of a fiber-reinforced cement board material that has been subjected to the method of the present invention.
FIG. 4 is a cross-sectional view of an essential part showing an example of a surface uneven press pattern of the present invention.
FIG. 5 is an enlarged cross-sectional view of a fiber-reinforced cement board material that has been subjected to the method of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Uncured fiber reinforced cement board 2 ... Conveyor 3 ... Coating apparatus 4 such as a flow coater and a roll coater ... Sealer 5 ... Knurled roll 6 ... Particulate matter 7 ... Flow coater 8 ... Paint
11A ... Natural stone-like uneven pattern
11B ... Brick-like joint groove pattern

Claims (1)

Immediately after primary curing, apply sealer to the surface of fiber reinforced cement board material that has residual heat during curing, and evenly disperse and adhere particulate matter before drying and hardening of the coating , and use the residual heat Dry and harden to fix and fix the particulate matter , and then fully cure the fiber reinforced cement board material to increase the strength of the fiber reinforced cement board material and dry and cure the sealer coating. A method for patterning a surface of a fiber-reinforced cement board, characterized in that a sealer coating is applied to the surface, followed by drying and then a top coating.

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