KR100309222B1 - A method making an enamel and construction meterials thereof - Google Patents

Abstract

The present invention relates to a low-temperature enamel manufacturing method and to a building exterior material manufactured by the same, more specifically, in the surface treatment of a building exterior material consisting of iron, aluminum, copper, stainless steel and other steel sheet material, polyester and inorganic By applying electrostatic method on the surface of the exterior material by electrostatic method and firing, drying and fusion under low temperature atmosphere, it is possible to obtain uniformity of coating and improve quality and durability. It prevents peeling from occurring and meets the flatness, smoothness, impact resistance and durability of the panel surface forming the exterior materials, and secures a variety of colors and gloss, thereby further enhancing the beauty of building exterior materials, and greatly improving productivity. Low temperature enamel manufacturing method and construction manufactured thereby It is intended to provide the exterior material for the feature.

Description

Method for manufacturing low temperature enamel and architectural exterior material manufactured thereby {A METHOD MAKING AN ENAMEL AND CONSTRUCTION METERIALS THEREOF}

The present invention relates to a low-temperature enamel manufacturing method and to a building exterior material manufactured by the same, more specifically, in the surface treatment of a building exterior material consisting of iron, aluminum, copper, stainless steel and other steel sheet material, polyester and inorganic Is applied to the surface of the exterior material by the electrostatic method and fired, dried and fused under low temperature atmosphere to obtain uniformity of coating and improve quality and durability. It prevents peeling from occurring and meets the flatness, smoothness, impact resistance and durability of the panel surface forming the exterior materials, and secures a variety of colors and gloss, thereby further enhancing the beauty of building exterior materials, and greatly improving productivity. Low temperature enamel manufacturing method and construction manufactured thereby It is about exterior materials.

In general, among the various types of metal enamel, especially steel enamel is widely used as a building material, especially because of the advantage that the base material steel sheet is cheaper and easier to purchase than other metals.

Conventional iron enamel has the advantages of high strength and high strength, but due to the disadvantage that rust corrosion or whitening easily occurs, it is used by applying the inorganic glass on both sides of the steel sheet.

At this time, the inorganic glass material is mainly composed of inorganic material which is mainly melted at high temperature such as silicon dioxide, aluminum oxide, titanium dioxide, barium oxide, etc. Done.

Since the production of the inorganic enamel is carried out at a high temperature of 800 ° C. or higher, as described above, the smoothness due to thermal expansion of the material decreases during firing, and the coating layer is damaged or peeled when the impact is weak. It is extremely difficult to maintain smoothness due to the warpage of the iron enamel itself due to high temperature firing, and due to the different expansion coefficients between the steel plate and the mineral, cracking occurs in the coating film, and external moisture penetrates the surface of the cracked steel sheet. Corrosion such as rust occurs.

In particular, when used as a building exterior material, the corrosion of iron due to rust occurs when acid rain is applied, which causes staining or discoloration of the surface of enamel products, and these problems have lung defects that drastically shorten the life of the product. It was a big issue for the industry to become.

The present invention has been researched and created to fundamentally solve all the problems of the prior art as described above, the object of providing the surface of the building exterior material consisting of iron, aluminum, copper, stainless steel and other plate materials In the treatment, the coating material of polyester and inorganic material is applied to the surface of the exterior material by using the electrostatic method, etc., and the quality and durability are improved by firing, drying and fusion at low temperature, so that the coating layer is damaged or peeled off even under impact and bending. It is to provide a method for producing a low temperature enamel so that this does not occur.

Another object of the present invention is to provide a manufacturing method of the low-temperature enamel to meet the flatness and smoothness, impact resistance, durability of the panel surface constituting the exterior material, thereby providing a building exterior material that is more beautiful.

Still another object of the present invention is to provide a method for producing the low-temperature enamel, which can greatly contribute to productivity improvement.

1 is a manufacturing process diagram of the present invention,

Figure 2 is a surface portion of the building exterior packaging material obtained by the manufacturing process of the present invention

Enlarged cross section.

<Explanation of symbols for the main parts of the drawings>

DESCRIPTION OF SYMBOLS 1 Plate 2 Zinc phosphate coating layer 3 Resin layer

4: inorganic layer 5: glossy layer

In order to achieve the above object, the present invention provides a method for producing the following low-temperature enamel.

That is, the present invention is a resin (C, B polyester); 55 to 65 wt% of a curing agent (T, G, I, C); 6-4 wt%, Inorganic Pigment; 35 to 25 wt%, a diffusion agent (SiO ₂ etc); 3,5-5,5 wt%, an additive (Anti Oxident PTFE Benzoin); A first step of obtaining a coating agent by mixing 0,5 wt%;

A second step of washing the material by spraying or immersing an acid or alkaline aqueous solution and then degreasing, washing with water and performing surface etching with alkaline solution, followed by washing with water sequentially;

A third step which is a pretreatment step of the surface of the material to be coated with zinc phosphate on the surface of the material washed by the second step, washed with water, and subjected to chromate washing;

A fourth step of applying the coating agent obtained by the first step to the surface of the material pretreated by the third step using an electrostatic method;

Provided is a low-temperature enamel manufacturing method in which a series of manufacturing steps for firing heat-treated for 10 to 15 minutes by putting the material coated with the coating agent in the fourth step into a firing furnace maintaining 250 ~ 280 ℃.

In this case, when the mixing amount of the resin in the mixing process, which is the first step, is 55 wt% or less, the hardness becomes strong, and when it is 65 wt% or more, the hardness is too weak, causing a problem of damage during external impact.

In addition, when the mixing amount of the inorganic pigment is less than 25wt%, there is a problem that the hardness is weakened and broken at the time of impact, and if it is more than 35wt%, the hardness is not only strong but also the delay of the firing time, the problem that the desired object can be obtained only when the firing temperature is increased. There was.

Preferably resin; Curing agent in an amount of about 60 wt%; 5 wt%, an inorganic pigment is added in an amount of about 30wt%, and a diffusion agent; 4,5 wt%, additives; It was found that the addition and mixing of 0,5 wt% was excellent in the heat treatment (fusion effect) during low temperature drying, that is, under low temperature atmosphere, and was not broken or peeled off even under impact and bending.

In addition, when the firing temperature in the firing process is 250 ℃ or less, the time required for firing is excessive and localized phenomena occur, so that the coating state is poor. When the firing temperature is higher than 280 ℃, the coating layer is easily damaged by overheating. Occurred.

It was found that the preferred firing temperature at this time was excellent in fusion effect when maintaining a low temperature atmosphere around 260 ° C, and maintains an excellent enamel layer that has a long life without being damaged or peeled off by external factors such as impact and bending. .

Building exterior material manufactured by such a low temperature enamel manufacturing method of the present invention as shown in Figure 2, the accompanying drawings,

The zinc phosphate coating layer 2, the resin layer 3, the inorganic layer 4, and the gloss layer 5, which are taken by a pretreatment step, are formed on the surface of the plate 1 composed of iron, aluminum, and the like having a predetermined thickness. It is deposited in the form of a coating film while maintaining a constant thickness.

The present invention is because there is no use of glass materials, so that the health of the user and the workforce put into the manufacturing process is no problem at all, there is no risk of fire, high productivity with a minimum number of people, and various colors And gloss can be secured, double the merchandise and reliability of the product.

In particular, the building exterior material manufactured by the manufacturing method of the present invention is resistant to scratches, impacts, and abrasion, uniform coating, mechanical durability, namely adhesion, elongation, wear resistance and corrosion resistance as well as gloss The effect of preservation rate, color safety and corrosion resistance is excellent.

According to the present invention, in the surface treatment of a building exterior material consisting of iron, aluminum, copper, stainless steel and other plate materials, a coating agent comprising a polyester and inorganic material is applied to the surface of the exterior material using an electrostatic method or the like and It improves the quality and durability by firing, drying, and sintering, and provides low temperature enamel manufacturing method that prevents coating layer from being damaged or peeling even under impact and bending. It is obvious that this invention is very advantageous invention that can meet the impact resistance and durability, and the beautifulness can not only provide the building construction material which has been further increased but also contribute to the productivity improvement.

Claims (2)

Resin (C, B polyester); 55 to 65 wt% of a curing agent (T, G, I, C); 6 to 4 wt%, Inorganic Pigment; 35 to 25 wt%, a diffusion agent (SiO ₂ etc); 3,5-5,5 wt%, an additive (Anti Oxident PTFE Benzoin); A first step of obtaining a coating agent by mixing 0,5 wt%; A second step of washing the material by spraying or immersing an acid or alkaline aqueous solution and then degreasing, washing with water and performing surface etching with alkaline solution, followed by washing with water sequentially; A third step which is a pretreatment step of the surface of the material to be coated with zinc phosphate on the surface of the material washed by the second step, washed with water, and subjected to chromate washing; A fourth step of applying the coating agent obtained by the first step to the surface of the material pretreated by the third step using an electrostatic method; A method of manufacturing a low temperature enamel in which a series of manufacturing steps are sequentially performed by putting a material coated with a coating agent in the fourth step into a firing furnace maintaining 250 to 280 ° C. for 10 to 15 minutes. The zinc phosphate coating layer 2, the resin layer 3, the inorganic layer 4, and the gloss layer 5, which are taken by a pretreatment step, are formed on the surface of the plate 1 composed of iron, aluminum, and the like having a predetermined thickness. A building exterior material obtained by the manufacturing method of a low temperature enamel, characterized in that the film is deposited in the form of a coating film while maintaining a constant thickness.