JPS5944111B2 - Painted board manufacturing method - 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 board that can prevent paint from being sucked into a porous substrate.

In the conventional method, even if a synthetic resin sealer is applied, it is difficult to prevent suction sufficiently.

Pasting paper, impregnated paper, cloth, etc. requires a large number of steps and is time-consuming. In addition, when used on the floor, if a heavy load is stretched, the paper may peel or the adhesive layer may be destroyed.
Paper, etc. may peel off. The invention of this application has succeeded in eliminating the above-mentioned conventional drawbacks, and the method for manufacturing a coated plate of the present invention is as follows. On the surface of the porous substrate,
The gist of the present invention is a method for producing a coated board, which is characterized in that a paint containing short fibers is applied, and then a paint containing a flaky pigment is applied.

In the invention of this application, the porous substrate includes wood, plywood, particle board, calcium silicate board, mortar, etc.

Fibers include asbestos, rock wool, wood fibers, glass fibers, Tetoron, rayon, polyamide, vinylon, acrylic, and other synthetic resin fibers.

The above-mentioned glass fibers and synthetic resin fibers have the advantage that they tend to have a uniform length, and can be easily aligned to about 0.2 mm when spray painting. Scale-like pigments are scale-like metal pieces such as mica, glass flakes (scale-like glass), and aluminum.

The mechanism for preventing paint from being sucked in in this invention is to first apply a paint containing only short fibers to the surface of a porous substrate, and then apply a paint containing scale pigments to the surface of the porous substrate. If so, it may not adapt to irregularities on the surface of the substrate, such as changes in the shape of conduit grooves on the surface of plywood, and the paint will be sucked into the substrate through the gaps, making it impossible to obtain very satisfactory results.

However, short fibers easily adapt to the irregularities of the substrate, preventing the paint from penetrating, and the flaky pigment applied later gets caught in the network of fibers, completely preventing penetration. Hereinafter, the present invention will be described in detail by citing one example of its implementation.

Example A mixture of 100 parts of clear urethane emulsion paint and 10 parts of glass fiber (1-size type, length 10 mm) (viscosity: 150 cps) was applied to a calcium silicate board (6 wtm) using a roll coater at 30 V/m. It was applied and dried at 50°C for 30 minutes.

On top of this, 100 parts of white acrylic lacquer paint mixed with 35 parts of glass flakes (average particle size, 40 μ) was applied using a flow coater (viscosity, 200 cps, coating amount 100 V/m"). Drying was carried out at 70°C for 40 minutes. All "parts" are parts by weight. The present invention has the following effects based on the above-mentioned constituent elements.

(1) Although the painting process is carried out twice, short fibers can be used to reliably form a mesh, the flake-like pigment can be used effectively, and paint can be prevented from being absorbed.

Claims (1)

[Claims] 1. A method for producing a coated board, which comprises applying a paint containing short fibers to the surface of a porous substrate, and then applying a paint containing a flaky pigment.