JPS6227384A - Method of painting inorganic board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a coating method for improving the frost damage resistance of an inorganic board.

[Background technique? l! ] Conventionally, paint is applied directly to the inorganic board, but there are many uneven coatings on the surface and edges, and there are especially unpainted areas on the edges. Water had entered the painted area and caused frost damage. Therefore, it was necessary to apply several coats of undercoating and topcoating to prevent uneven coating, resulting in poor painting workability.

[Object of the invention] The present invention has been made in view of the above circumstances, and its purpose is to form a mu layer that becomes a uniform protective film over the entire surface of an inorganic board before painting. To obtain an inorganic decorative board with improved frost damage resistance by preventing water from entering the non-W1 board even if there are uneven coatings or unpainted areas, and to improve the workability of painting.

[Disclosure of the Invention] The method for forming an inorganic board of the present invention includes immersing the inorganic board 1 in a resin liquid bath 2, impregnating it with resin 83, and heating it to form a resin layer on the surface of the inorganic board 1 to the inside. 4 is formed, and then a paint 5 is applied to the inorganic board 1 to form a coating film 6. With this configuration, the above object can be achieved. That is, after forming the resin layer 4 on the surface of the inorganic board 1 that extends to the inside, the paint 5 is applied to the surface of the inorganic board 1, so even if there are uneven coatings or unpainted areas, water will not infiltrate. It is possible to prevent frost damage and improve frost damage resistance, and since there is no problem with frost damage resistance even if there are uneven coatings or unpainted areas, painting workability can be significantly improved. .

The present invention will now be described with reference to the accompanying drawings. Examples of the inorganic board 1 include asbestos slate, wood wool cement board, asbestos cement perlite board, pulp cement board, and decorative asbestos cement board. This inorganic board 1 is first immersed in a resin liquid tank 2 and impregnated with 100% fat liquid 3 (
Figure 1). The shape of the inorganic plate 1 may be either a plate-like one 1a or a tile-like one 11I. As the resin liquid 3, for example, acrylic resin emulsion (acrylic resin and water in a blending ratio of 0 to 10) can be used. The immersion time is about 10 to 60 seconds. After the inorganic board 1 is impregnated with the resin liquid 3 in this way, it is heated in the dryer 8 at a temperature higher than the melting temperature, for example, about 80° C., for about 20 minutes to reach the inside of the inorganic board 1. A resin layer 4 is formed (FIG. 2). This resin layer 4 is inside, If! 14a is 50-200μm external/14b
is preferably about 5-20 Iw. If the outer layer 4b is too thick, the next paint film 6 will swell.

Next, inorganic board 1 is still hot! ! ! Then, use this heat as preheat to apply the paint 5 to the inorganic board 1 using a 70-coater 7 or the like! ! *Figure 3), coating film 6
The inorganic decorative board A is manufactured by forming the following.

Next, examples of the present invention will be specifically described, but the present invention is not limited to the following examples.

(Example) A fiber cement board was immersed for 30 seconds in a resin bath containing acrylic resin Emalnosyn with a solid content concentration of 10% by weight, and then heated at a temperature of 80°C for 20 minutes to form an inner layer of 80 μm and an outer layer of 10 μm. Form 04 fat layer L, then 70-
Apply 85 g/m2 of paint with a coater, 80℃, 30
Heat it for a minute and bake it to form a coating film, and the inorganic decorative board is
I sent one. The frost damage resistance of this inorganic decorative board was measured (^
(00 cycles to STM Happo) The results were good with no delamination or cracking. (Comparative example) For comparison, the actual JIA product was used except that no resin layer was formed.
In the same way as in the example, namely N & Visemet plates.

- After preheating at C for 20 minutes, 85 g/m2 of paint was applied using a 70-coater, and then heated and baked at a temperature of 80°C for 30 minutes to form a coating film to produce an inorganic decorative board. The frost damage resistance of this inorganic decorative board was measured (^STM
00 cycles) Occurrence of delamination and cracking was observed. This is thought to be due to uneven coating or water intrusion from unpainted areas.

[Effect of the invention 1] In the present invention, the resin layer is formed on the surface of the inorganic board and extends to the inside, and then the paint is applied. (The oil layer can prevent the infiltration of paint and improve frost damage resistance. Even if there are uneven coatings or unpainted areas, there is no problem with frost damage resistance.) Work efficiency can be significantly improved.

[Brief explanation of drawings]

Figure 1! @Figure 2 and Figure 3 are explanatory diagrams showing the process of the present invention, Figures 4 (a) and (b) are cross-sectional views showing the inorganic plate in Figure 2, and Figures 5 (,) and (b) are the same as above. 1 is a cross-sectional view showing an inorganic decorative board obtained by the method, in which 1 is an inorganic board, 2 is a resin liquid tank, 3 is a resin liquid, 4 is a resin layer, 5 is a paint, and 6 is a coating film.

Claims (1)

[Claims] (1) The inorganic board is immersed in a resin liquid bath, impregnated with the resin liquid, and then heated to form a resin layer on the surface of the inorganic board that extends to the inside.Then, paint is applied to the inorganic board to form a coating film. A method for painting an inorganic board, characterized by forming.