JP2001087702A - Method for sealer treatment of inorganic board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel method for a sealer treatment which is capable of improving the adhesion property of a base material of an inorganic board and a coating material for finish coat. SOLUTION: In the method for the sealer treatment of the inorganic board which subjects the surface of the inorganic board to the sealer treatment before finish coating, a sealer coating material is applied wet on wet plural times on the surface of the inorganic board while its viscosity is gradually increased and thereafter the sealer coating material is held down by a sponge roll and the excess sealer coating material is removed by an air knife.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating a sealer of an inorganic plate. More specifically, the invention of this application relates to a base material of an inorganic plate used for an exterior material of a house or the like, and to a new method of treating a sealer of an inorganic plate capable of improving the adhesion to a paint for an overcoat.

[0002]

2. Description of the Related Art Conventionally, inorganic plates used for exterior materials of houses and the like are used for surface decoration and for improving nonflammability, chemical resistance, water resistance, weather resistance, dimensional stability and the like. It is painted on. Before coating, a sealer treatment is performed to apply a sealer coating on the surface of the inorganic base material before the top coating in order to enhance the adhesion between the top coating and the inorganic base material and the surface uniformity of the top coating. .
Using a coater such as a roller coater, a flow coater, or a spray, a clear paint adjusted to a constant viscosity is applied once as a sealer paint on the surface of the inorganic base material after curing and curing.

[0003]

However, the conventional sealer treatment method as described above often fails to provide the desired adhesion to the inorganic base material or the topcoat paint expected for the sealer treatment. That is, when the viscosity of the coating material for the sealer is low, the coating material is excessively impregnated into the inorganic base material, the surface after coating becomes porous, and the adhesion to the top coating material is reduced. In addition, when the viscosity of the sealer coating is high, the adhesion between the sealer coating and the top coating is improved, but the impregnation into the inorganic base material is insufficient, and the adhesion with the inorganic base material is reduced. I will.

[0004] The invention of this application has been made in view of the above circumstances, and solves the problems of the prior art.
It is an object of the present invention to provide a new sealer treatment method capable of improving the adhesion between a base material of an inorganic plate and a paint for an overcoat.

[0005]

Means for Solving the Problems The invention of this application is directed to an inorganic sealer treatment method for sealing the surface of an inorganic base material before overcoating, wherein the paint for the sealer is made of an inorganic material. The present invention provides a sealer treatment method for an inorganic plate, characterized in that the surface of a base material is coated a plurality of times while gradually increasing the viscosity (claim 1).

Further, the invention of the present application is directed to a method for treating a sealer of an inorganic plate, wherein the sealer paint is shower-coated on the entire surface of the inorganic base material, the sealer paint is pressed down with a sponge roll, and then the excess is sprayed with an air knife. Removing the sealer paint (claim 2);
The fact that the paint for the sealer is the same color as the paint for the top coat (claim 3) is provided as a preferred embodiment.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The method for treating a sealer of an inorganic plate according to the invention of the present application will be described in more detail with reference to the accompanying drawings. In the method for treating a sealer of an inorganic plate according to the invention of the present application, as described above, a sealer coating is applied to the surface of the inorganic base material plural times while gradually increasing the viscosity. By this coating, Fig. 1 <a>
As illustrated in the above, the surface of the inorganic base material (1) is coated with a low-viscosity sealer paint, and the impregnating property due to the low viscosity is exerted. Is formed. At this time, the surface of the impregnated layer (2) is still porous like the surface of the inorganic substrate (1). However, the pores on the surface of the impregnated layer (2) are, as exemplified in FIG. 1 <b>,
Next, it is filled with a medium-viscosity sealer paint to be coated, and an adhesion layer (3) is formed. The adhesion layer (3) adheres well to the inorganic substrate (1) due to the presence of the impregnation layer (2). Then, as illustrated in FIG. 1 <c>, a high-viscosity top-coating paint (4) applied on the adhesion layer (3)
Closely adheres to the adhesion layer (3). Thus, the adhesion between the coating material for the sealer, the inorganic base material (1), and the coating material for the top coat (4) is improved, and a good adhesion state is realized.

[0008] In the sealer treatment method for an inorganic plate of the present invention, a water-based emulsion paint can be used as a paint for the sealer. Although the viscosity is not particularly limited, for example, the value measured with a BM viscometer at 6 rpm before water dilution is about 80 to 150 poise, and this can be adjusted by appropriately diluting with water. For example, the viscosity can be adjusted by diluting the sealer paint to 1 with a weight ratio of water to about 0.5 to 2 for the dilution.

In the sealer treatment method for an inorganic plate of the present invention, when the sealer treatment is performed, as shown in FIG. 2, a shower coater (5) is used to coat the sealer coating (6) with an inorganic base material. Shower coating can be applied to the entire surface of the material (1), including the opening. Kiguchi can be painted at the same time by shower painting. After the shower coating, the sealer coating (6) coated with the sponge roll (7) can be pressed down.

By the pressing with the sponge roll (7), the sealer coating (6) is converted into the inorganic base material (1).
Satisfactorily impregnates the surface of the sealer and is effective for improving the adhesion, and the uniformity of application of the sealer coating (6) is improved. Insufficiency of impregnation of the sealer coating (6) and uneven coating are eliminated. Sponge roll (7) for sealer paint (6)
After pressing down, the excess sealer paint (6) can be removed using an air knife (8) and collected in a paint recovery booth (9).

As illustrated in FIG. 3, the paint pool (10) which is easily formed on the surface of the inorganic substrate (1) and at the tip of the tip is removed by air (11) blown out from an air knife (8). Is done. Paint pool (10)
The foaming, swelling, etc. caused by the above are prevented. Further, in the sealer treatment method for an inorganic plate of the invention of the present application, a pigment or the like can be mixed with the paint for the sealer to make the same color as the paint for the top coat. When the paint for the sealer and the paint for the top coat are the same color, the color of the inorganic base material does not appear as it is even if the thickness of the paint film for the top coat is reduced due to aging, and it is beautiful for a long time. Can be maintained. The concealability of the inorganic base material is improved.

Of course, the present invention is not limited to the above examples, and it goes without saying that various aspects can be taken in detail.

[0013]

EXAMPLES Examples 1 to 3 A paint for sealer (KPA sealer (water-based emulsion paint) manufactured by Kansai Paint) was diluted in a weight ratio of 0.5 to 2 with respect to 1 for the paint. While adjusting the viscosity, the surface of the inorganic base material was applied a plurality of times while gradually increasing the viscosity, and a sealer treatment was performed. The sealer treatment was performed according to the steps shown in FIG. 2, and the conditions were as shown in Table 1. Comparative Examples 1-2 The same paint as the sealer used in Examples 1-3 was diluted with paint 1 as water 1 and the viscosity was 50 poise.
Was adjusted. This sealer coating was applied to the surface of the inorganic base material by roll coating (Comparative Example 1) and spray coating (Comparative Example 2).

The state after the sealer treatment and the adhesion of the coating film were evaluated. The results are shown in Table 1.

[0015]

[Table 1] As is clear from the comparison between Examples 1 to 3 and Comparative Examples 1 and 2, the sealer coating method according to the invention of the present application impregnated the inorganic base material highly with the inorganic base material. Good adhesiveness. In addition, the adhesion to the top coating material is improved. When using a colored sealer paint, a colored layer is formed on the surface of the inorganic base material,
The concealability of the inorganic base material is enhanced.

[0016]

As described in detail above, according to the invention of this application, in the sealing treatment of the inorganic plate, the adhesion to the inorganic base material and the top coating material is improved.

[Brief description of the drawings]

FIG. 1 is a process cross-sectional view showing an outline of a sealer processing method for an inorganic plate of the present invention.

FIG. 2 is a process perspective view showing one embodiment of a sealer treatment method for an inorganic plate of the present invention.

FIG. 3 is a cross-sectional view of a main part showing removal of excess sealer paint by an air knife.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inorganic base material 2 Impregnation layer 3 Adhesion layer 4 Top coat paint 5 Shower coater 6 Sealer paint 7 Sponge roll 8 Air knife 9 Paint collection booth 10 Paint pool 11 Air

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // B05C 5/00 103 B05C 5/00 103 E04F 13/14 103 E04F 13/14 103A (72) Inventor Koichi Nishimura 1048 Kadoma Kadoma, Kadoma-shi, Osaka Matsushita Electric Works, Ltd. (72) Inventor Toru Osasayama 1048 Kadoma Kadoma, Kadoma-shi, Osaka Matsushita Electric Works F-term (reference) 2E110 AA14 AA47 AA57 AB04 AB22 BA02 BA12 BB04 BB05 BB18 GA29W GA32W GA33X GB11X GB42W 4D075 AC13 AC54 AC60 AE06 CA13 DA06 DB11 DC01 EA39 EB52 4F041 AA02 CA04 CA11 CA28 4F042 AA02 AA16 CC02 CC09 DD09 DD34 4G028 FA01

Claims (3)

[Claims] 1. A method for treating a surface of an inorganic substrate, wherein the surface of the inorganic substrate is subjected to a sealer treatment prior to the topcoating, wherein the coating for the sealer is applied a plurality of times while gradually increasing the viscosity on the surface of the inorganic substrate. A method for treating a sealer of an inorganic plate. 2. The inorganic plate according to claim 1, wherein the sealer paint is shower-coated on the entire surface of the inorganic base material, and then the sealer paint is pressed down with a sponge roll, and then the excess sealer paint is removed with an air knife. Sealer treatment method. 3. The method according to claim 1, wherein the paint for the sealer has the same color as the paint for the top coat.