JPS6295176A - Metallic coated sheet - Google Patents

Abstract

PURPOSE:To suppress the overbrightness of metallic coating and to improve the pearl effect under the fluorescent lamp in a room by coating the surface of a coated film of a solvent-type paint or a powder-type paint on the metallic sheet with a paint contg. mica powder and metallic powder. CONSTITUTION:The paint 6 contg. mica powder 7 and metallic powder 8 such as Al powder is coated on the surface of the coated film 5 of a solvent-type paint or a powder-type paint on the metallic coated sheet 4. Namely, a specific pearl clear paint incorporated with 0.1-3.0wt% mica powder having 10-100mmu particle diameter and 0.01-0.5wt% Al powder having 10-100mmu particle diameter is used. Consequently, the pearl effect under the fluorescent lamp in a room is improved, the overbrightness as in the conventional metallic paint consisting of Al powder alone can be suppressed, and high-grade painting having depth can be effectively applied.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method for coating metal, and particularly to a method for coating pearl-coated metal suitable for outer boxes and Uzuki of refrigerators.

[Background of the invention]

The surfaces of the outer boxes and enclosures of commercially available refrigerators are finished by electrostatic coating using a solvent-based paint such as acrylic resin or polyester resin, or by the curtain 70 coating method.

The electrostatic coating method is a method in which atomized solvent-based paint is applied to an object using static electricity, and is widely used for coating metal surfaces.

On the other hand, the Chikara-Ten 70-painting method is a method in which the paint is poured down from the paint head in a curtain-like manner, and then passed through a metal plate placed on a belt conveyor underneath. Used for surface coating.

However, these coated plates have the following drawbacks.

In other words, in the electrostatic coating method, unevenness of the coating film called yuzu skin occurs, and in the curtain 70-painting method, a smooth surface is obtained, but the surface roughness of the metal plate material appears in the painted appearance and the gloss is reduced. However, only a low-grade painted appearance can be obtained.

Therefore, in order to compensate for these defects, metallic paint containing aluminum powder or pearl paint containing mica powder is applied to the painted surface, but with metallic coating, each aluminum particle shines too much, and on the other hand, Pearl coatings containing mica powder lacked the characteristic pearl shine (pearl effect) when indoors under fluorescent light, and both lacked a sense of luxury.

Note that, for example, Japanese Patent Application Laid-Open No. 52-57277 is cited as related to this type of coating means.

[Purpose of the invention]

The purpose of the present invention is to develop a new coating method that suppresses the excessive shine of metallic coatings, which had the disadvantage of solvent-based coatings, and improves the pearl effect of indoor fluorescent lights, without impairing the original color tone of solvent-based coatings. It is about providing.

[Summary of the invention]

In other words, a special pearl clear, which is a mixture of mica powder and aluminum powder at a certain concentration, is applied to the coating surface of the metal coating plate.
It is coated using an 0-coater, electrostatic coating machine, hand-sprayed coating, etc., and then baked.

[Embodiments of the invention]

The details of the present invention will be explained below with reference to embodiments shown in the drawings. Fig. 1 is a perspective view of a refrigerator in which the present invention is implemented on the front surface of eggs. In the figure, 1 indicates the outer box, and 2.2' indicates the door. Both surfaces have been previously coated and baked with a solvent-based or powder-based synthetic resin paint, such as an acrylic resin paint or a polyester resin paint, by an electrostatic coating method, a curtain 70-painting method, or the like. 3.3' shows the state in which a clear paint containing a mixture of mica powder and aluminum powder according to the present invention is applied by electrostatic coating or curtain 70-coating, and is formed on the front surface of the door.

FIG. 2 is an enlarged cross-sectional view of the door. In the figure, 4 is a metal plate, 5 is a base color coating film, 6 is a special pearl coating film, 7 is a mica powder, and 8 is an aluminum powder.

In such a pearl coating film 6, the mica powder 7 and aluminum powder 8 in the paint have an optimal particle size and a mixing ratio of both so as not to impair the appearance (under indoor fluorescent lighting, the pearl effect can be maintained). It has been discovered that there is a region in which the best results are obtained.That is, mica powder with a particle size of 10 to 10Q7zm has a weight concentration of 0.
1-3.096, aluminum powder with a particle size of 10-100μm
．． By using a special pearl clear containing 01 to 0.5%, the pearl effect will be the best. In other words, the light incident from the outside of the sin is totally reflected by the aluminum powder and mica powder, and the secondary reflected light that interferes with each other becomes a mixed reflected light, resulting in an elegant pearl with no flimsy edges. It depends on whether you get the effect or not. On the other hand, if the amount of mica powder or aluminum powder is less than this, there will be less reflected light (and the pearl effect cannot be achieved. Especially under indoor fluorescent lighting, the pearl effect cannot be obtained.On the other hand, if the amount is too much) In this case, there is too much interference between the reflected light from the aluminum powder and the mica powder, which weakens the light and creates a pearl effect.Furthermore, the mica powder and aluminum powder aggregate, resulting in an eaves pattern. Also, if there is too much aluminum powder, the gloss will decrease, the color will become dark, and the product will look metallic, resulting in a loss of luxury.

In addition, in the present invention, since the pearl coating film is made by mixing a small amount of mica powder and aluminum powder with a transparent rear paint, the color tone of the base coating film is maintained as it is, and when viewed as a whole, the monochromatic color tone is not damaged. It has the advantage of producing a deep, high-grade pearl coating appearance that will never fade.

〔Effect of the invention〕

As explained above, the present invention provides a very good pearl effect under indoor fluorescent lighting compared to conventional pearl paints made only of mica powder, and also improves the metallic shine of conventional metallic paints made only of aluminum powder. It is very effective in suppressing rust and creating a deep, high-quality paint job.

In addition, by adding a small amount of aluminum powder, a pearl effect can be obtained without increasing the amount of expensive mica powder, which has the effect of reducing paint costs.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a refrigerator coated with the special pearl clear paint of the present invention, and FIG. 2 is an enlarged sectional view of the cross section of FIG. 1. l...outer box, 2.2'...door, 3.3'...special pearl coating on the front of the door, 4...metal plate, 5...base coating film, 6... Special pearl clear film, 7...mica powder, 8...aluminum powder.

Claims (1)

[Claims] A coated metal plate characterized in that a paint containing mica powder and metal powder is applied onto the coated surface of the metal plate coated with a solvent-based paint or a powder-type paint.