KR20110121482A - Method for painting - Google Patents

Abstract

The present invention relates to a dry coating method, but the conventional wet coating method has a disadvantage of making a substance harmful to the human body and the environment, but the present invention by making the pores on the surface of the base material and by infiltrating and accepting the vaporized dye in the pores after sublimation. The present invention relates to a dry coating method that maintains the effect of painting for a long time while preventing harmful substances from occurring to humans and the environment.

Description

Dry coating method to paint the surface of material {METHOD FOR PAINTING}

The present invention relates to a coating method for imparting color to metals, nonferrous metals, and plastic materials.

The present invention relates to a coating method for imparting color to metals, nonferrous metals, and plastic materials, and does not emit harmful substances to humans and the environment, as in coating by wet coating methods using conventional paints and inks, and various colors according to materials. It relates to an environmentally friendly dry coating method that can be implemented.

Conventionally, methods such as wet coating, plating, and vacuum deposition have been used to impart durability and color to metals, nonferrous metals, plastics, etc. Among them, wet coating methods have been generally used. 1 shows a conventional wet coating method. The method of wet coating is to wet the primer 11 on the base material 10 by spraying or dipping, and to proceed with the color coating layer 12 by color painting using color coating by the method of color spraying or dipping. The upper protective coating layer 13 is formed by this. To paint. At this time, the thermal curing or UV curing process is added for drying and curing after each painting, and the paint used according to each curing method is urethane, acrylic, epoxy, etc., which is harmful to human body and environment for the coating process of spraying or dipping. Since paints diluted in various solvents containing thinner, benzene, toluene and the like are used, many substances harmful to the human body and the environment are released during the coating process or during the drying and curing processes.

Republic of Korea Patent Registration No. 10-0320600 'Painting method' is a predetermined color to form a color base on the coating after coating the color coating on the first coating layer on the work to form an intermediate coating layer and drying the intermediate coating layer A method of applying on a color base layer with a wet apparatus has been disclosed to apply a color paint of the coating and to form a brightener base layer. However, since the coating method also includes a wet method, there is still a possibility that a harmful substance is released.

The present invention proposes a dry coating method for imparting color to various materials without directly using a solvent harmful to a human body or the environment to prevent environmental pollution.

In order to achieve the object as described above, there is provided a dry method for coating the surface of the material, the method comprising the steps of forming a pretreatment layer on the surface of the material; And a third step of heating the pretreatment layer to form pores and accommodating vaporized dye in the pores; and a fourth step of closing the pores by cooling the pretreatment layer.

The pretreatment layer may be any one of anodizing, epoxy, urethane, and a coating layer of a polyester-based polymer material.

The second step is performed at 100 to 300 degrees Celsius and the heating of the third step may be to heat the pretreatment layer 100 to 250 degrees Celsius.

 The fourth step may be to close the pores of the pretreatment layer to form a protective layer to protect the received color dye.

The coating method as described above has the effect of maintaining the effect of the coating for a long time without generating substances harmful to the human body or the environment during or after completion of the process.

1 is a view showing a conventional coating method
2 is a flow chart showing a coating method according to the present invention.
3 and 4 show the concept of a coating method according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Figure 2 is a flow chart showing the order of the dry coating according to the present invention, Figures 3 and 4 is a view showing the concept of the coating according to the present invention. In the present invention, in order to give color to the metal, nonferrous metal, plastic, etc. in an environmentally friendly manner, a dye vaporized by heat is used without using a wet method. The dye vaporized by heat is deposited on the surface of the object to be colored by evaporation without passing through the liquid from the solid, and then cooled to solid again to realize the required color. It is a material that is transferred and used as heat.

 In the present invention, by using the characteristics of the transfer dye material, an anodizing treatment of epoxy, urethane, polyester-based material that can easily penetrate the dye or the first material, such as metal, non-ferrous metal, plastic, etc. The dye is impregnated into the substrate coated with the polymer material, and the dry coating method does not generate harmful by-products to the human body and the environment compared to the conventional wet coating method.

As shown in FIG. 3, the pretreatment layer 24 is formed on the base material 10 to be painted. As described above, the pretreatment layer is coated on the surface of the base material 10 by using an anodizing treatment so as to penetrate the dye well or using a polymer material such as epoxy, urethane, and polyester. The thickness of the pretreatment layer will vary depending on the color to be implemented and is typically formed at about 5-30 micrometers. If it is less than this, it is difficult to form voids, and if it is thicker than this, it may not be too thick because the color may appear cloudy due to the thickness of the pretreatment layer.

Thereafter, the dye 21 of the color to be painted is vaporized. The dye is placed on the heater 20 so that the dye can be directly vaporized by receiving heat generated from the heater. To this end, the heater is heated to a temperature of 100 degrees Celsius to 300 degrees Celsius.

While the dye is vaporized, another heater is placed on the opposite side where the pretreatment layer is formed on the base material, thereby heating the heater. The heat generated from the heater is about 100 to 250 degrees Celsius to the pretreatment layer formed on the base material. Since the base material is formed between the pretreatment layer and the heater, the temperature is lower than the temperature of the dye. In addition, since the bonding force of the polymer material constituting the pretreatment layer is higher than that of the dye, vaporization does not occur like the dye, but as the gap between the polymer materials constituting the pretreatment layer increases, small pores 23 are formed. That is, by installing a heater behind the base material to heat the pretreatment layer, voids are formed in the pretreatment layer, and vaporized dye penetrates into the pores to impart color to the surface of the material. When forming the pretreatment layer with epoxy, urethane, or polyester-based polymer material, it is recommended to proceed as low as possible in order to avoid damaging the base material. Sufficient voids are formed to receive the dye. In general, a temperature above the glass transition temperature of the material is required. For example, the polyester pretreatment layer is suitable for 160 to 210 degrees.

If the vaporized dye is penetrated into the pores of the pretreatment layer and the color is coated to a desired degree, the coating is completed when the pretreatment layer is cooled to room temperature to close the generated pores.

Figure 4 is to form a pretreatment layer through which the dye can penetrate the surface of the material, and then impart color by penetrating the vaporized dye in the same manner as described above and imparting color. This prevents the dye from being damaged easily and keeps the color for a long time. Such a method is environmentally friendly compared to the wet method since the dye vaporized during the process is solidified by cooling after the painting process is in progress, so that no by-products harmful to the environment or the human body are generated.

10: Base material 11: Primer
12: coating layer 13: protective coating layer
20: heater 21,22: dye
23: void 24: pretreatment layer
25: Painting layer

Claims (4)

As a dry coating method for painting the surface of the material,
Forming a pretreatment layer on the surface of the material;
A second step of vaporizing the dye used for painting by heating;
A third step of heating the pretreatment layer to form voids and accommodating vaporized dye in the voids;
A fourth step of closing the gap by cooling the pretreatment layer;
Including,
Dry coating method to paint the surface of the material The dry coating method of claim 1, wherein the pretreatment layer is any one of an anodizing, epoxy, urethane, and polyester coating layers. The method of claim 2, wherein the second step is performed at 100 ° C. to 300 ° C., and the heating of the third step is to heat the pretreatment layer to 100 ° C. to 250 ° C. Dry coating method The dry coating method of claim 3, wherein the dye penetrates into the pretreatment layer to protect the coated layer from the protective layer formed while the pores are closed.

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