JPS5944112B2 - Manufacturing method of painted board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The object of the invention of this application is to provide a method for manufacturing a coated plate that is less likely to absorb porous materials and has good surface properties.

If a scaly pigment is used when painting a porous material, it has the effect of preventing paint from being sucked in.

At this time, the larger the diameter of the scales, the greater the effect, but the disadvantage is that the surface becomes rough. In the present invention, in order to prevent this, a surface finish with good surface properties was obtained with a small amount of coating by applying a paint containing a scale pigment smaller than that mixed in the base paint. The method for manufacturing the coated plate according to the invention of this application is as follows.

When painting porous materials, the scale-like pigment is mixed into the paint, and the coating layer is divided into two or more layers, and the particle size of the scale-like pigment contained in the upper layer is smaller than that of the lower layer. The gist of this paper is a method of manufacturing a coated board, which is characterized in that it is used.

In the invention of this application, porous materials include plywood,
Wooden boards such as particle board, insulation board, hardboard, inorganic boards such as calcium carbonate board, calcium silicate board, asbestos slate board, lightweight concrete board, pulp cement board, mortar board, etc.

Scaly pigments are scaly metal pieces such as mica, glass flakes (scaly glass), and aluminum.

The present invention will be described in detail below with reference to Examples thereof. Example 1 A paint consisting of 100 parts by weight of white acrylic urethane enamel mixed with 10 parts by weight of mica powder (3o mesh) was applied onto a mortar layer with a thickness of 207 nm using a roll coater (coating amount: 40 V/Trl).

Leave this at room temperature for 1 minute, then add mica powder (325 mesh) to 100 parts by weight of the same white acrylic urethane enamel.
A paint (top coat) containing 15 parts by weight of 15 parts by weight was applied using a flow coater (coating amount: 60 y/m'') and dried at 60°C for 2 minutes to obtain a white coated board with good surface properties.
Those using mesh mica have a rough surface and 3
In the case of using 25 mesh, partial suction was observed.

Example 2 A paint consisting of 100 parts by weight of red amino alkyd paint mixed with 15 parts by weight of mica powder (50 mesh) was applied to a 9m7n insulation board using a roll coater (coating amount: 50y/771"). 400～
Dry at 80°C for 20 minutes, then spray 100 parts by weight of clear amino alkyd paint with 20 parts by weight of glass flakes (220 mesh) (top coat) at 40V.
/m'' and dried at 400 to 70°C for 30 minutes to obtain a coated plate with good surface properties.

When the same amount of paint was applied and 50 mesh mica powder was used for both the top coat and undercoat, the surface became rough and spraying was difficult. In order to obtain the same surface condition by using 50 mesh of mica powder for the undercoat and not using glass flakes for the clear topcoat, it was necessary to apply a clear coating amount of 657/I.

The present invention has the following effects based on the above-mentioned constituent elements.

Since the base coat contains a large scale pigment, it has a remarkable effect of preventing the paint from being sucked into the base material, and the top coat also contains a scale pigment, so the unevenness of the base material can be completely eliminated. It can be hidden.

Claims (1)

[Claims] 1 When painting porous materials, the scale-like pigment is mixed into the paint, and the coating layer is applied in two or more layers, and the particle size of the scale-like pigment contained in the upper layer is smaller than that of the lower layer. A method for manufacturing a painted board, characterized by using a painted board.