KR100864113B1 - Surface coating method of using one component paint - Google Patents

Abstract

A surface coating method using one-component paint is provided to make a coating film printed on a panel, flexible and firm by increasing attachment property, antifouling property, chemical resistance, and wear resistance of the one-component paint by urethane acrylate included in the one-component paint. A surface coating method using one-component paint comprises the steps of: attaching a pattern sheet made of an LPM(Low Pressure Melamine Impregnated Paper), on a wood or metal panel by using urea resin(S1); polishing the pattern sheet attached on the panel, by a sanding machine using a sandpaper of No.180~280(S10); printing one-component paint on the panel by using a silk printer, a roller, or a brush, mixing the one-component paint and pearl ink at the weight percent of 10:1, and printing various shapes of images by using the silk printer, the roller, or the brush, wherein one-component paint consists of urethane acrylate of 35~50wt.%, methacrylate of 35~45wt.%, an initiator of 10~15wt.%, and a silicone additive of 5wt.%(S20); and spraying transparent paint on the panel in a curtain cotton method and then, finishing coating the surface by hardening the panel while exposing the panel to ultraviolet rays(S30).

Description

Surface coating method of using one component paint}

The present invention relates to a surface coating method using a one-part coating, and more particularly, by attaching a shape paper impregnated with melamine resin to a panel, and printing the surface coating by printing a one-part paint on the panel having the shape paper attached thereto. It relates to a surface coating method using a one-component paint that can be excellent in the adhesiveness of each paint printed on the panel and does not need to add a curing agent such as thinner, which can harden the paint printed on the panel in an environmentally friendly and fast time.

In general, a method of coating a panel such as wood or metal materials is formed by printing a formica paint or an ultraviolet paint on the panel to harden it to form a undercoat, and by printing a paint such as UV paint and formica paint on the upper side of the undercoat. A layer, a top coat layer, etc. were formed.

Here, to print a paint (commonly referred to as a two-component paint) to which a curing agent (for example, thinner, etc.) is added to quickly cure the formica paint used to form the undercoat, the middle coat, the top coat, and the like. When the curing agent added to the paint printed on the panel was volatilized, the paint printed on the panel was cured.

Further, as shown in Patent Registration No. 10-443057, a sheet of impregnated melamine resin (for example, HPM (high pressure melamine sheet) or LPM (low pressure melamine impregnated paper: low pressure melamine impregnation) The sheet is impregnated with urea resin, and heat press-molded with a press to attach a shape sheet to the panel.

Then, the phenolic resin impregnated liquid was impregnated with the phenolic resin on the upper side of the paper to prepare the phenolic resin impregnated paper, and then the upper surface of the phenolic resin impregnated paper was not printed with a paint such as an ultraviolet paint, and impregnated with the melamine resin and the phenolic resin. One impregnated paper was printed by hot pressing using a press in a plurality of layers such as forming a middle and top coat layer.

However, after applying low-pressure melamine impregnated paper or high-pressure melamine impregnated paper to the panel and pressing-molded with a press, the sheet paper impregnated with melamine resin and phenolic resin is again coated with the melamine resin and the phenolic resin without printing UV paint or formica paint. Since it was necessary to form a plurality of layers, such as to form, as the work process for attaching a plurality of layers of sheet paper to the panel is complicated and accordingly, there was a problem that the manufacturing cost increases.

In addition, the sheet paper attached to the panel is attached only by the phenol resin or the urea resin, and when a certain time passes, the adhesive strength of the resin is lowered, and the sheet attached to the panel is peeled off.

In addition, the impregnated melamine resin in the shape paper, and the impregnated phenolic resin and epoxy resin impregnation liquid or polyester resin impregnation liquid with a gypsum added to the shape paper as shown in Patent Registration No. 10-443058, and then heats with a press Press molding and glass reinforced plastics were used.

However, the work process for applying gypsum and glass-reinforced plastic to the shape paper impregnated with the melamine resin as described above has a problem that the work takes a long time.

In addition, in place of the high pressure melamine impregnation paper or the low pressure melamine impregnation paper attached to the panel as disclosed in Patent Publication No. 10-2008-6663, impregnated with a phenolic melamine co-condensation resin to the shape paper to be used, and the melamine resin on the shape paper again After mixing and impregnating the synthetic sheet paper to the panel, and pressing the synthetic sheet paper by press, spraying the UV paint containing unsaturated polyester resin, acrylic resin and acrylate to the upper side of the paper and exposed to the ultraviolet lamp Cured and used.

However, when attaching a synthetic sheet of paper instead of a sheet of paper attached to the panel, there is a problem that the manufacturing cost is increased because the process for forming the synthetic sheet of paper is complicated.

When the low pressure melamine impregnated paper or the high pressure melamine impregnated paper is attached to the panel as described above, the adhesiveness of the paint such as ultraviolet paint is limited to the upper side of the high pressure melamine impregnated paper or the low pressure melamine impregnated paper, so that various resins cannot be used without printing the paint. There was a problem that should print the shape paper.

On the other hand, as shown in No. 10-2008-6663, without the low-pressure melamine-impregnated paper or the high-pressure melamine-impregnated paper to be attached to the panel, in order to print paints such as UV paint, it was necessary to manufacture a synthetic sheet paper that must go through several processes. In order to increase the fixation, the unsaturated polyester resin in the ultraviolet paint printed on the upper side of the synthetic sheet paper was changed in color over time, the reaction time of the unsaturated polyester resin is slow the unsaturated polyester resin There was a problem that the curing time of the blended coating is long.

The present invention for solving the above problems after attaching the low-pressure melamine impregnated paper or high-pressure melamine impregnated paper to a panel such as wood and metal, silk printing without the need to form a middle layer, a top coat layer, etc. on the upper side of the panel When printing a one-part paint containing urethane acrylate, methacrylate, initiator, and silicone-based additives on the panel by using an apparatus, a brush, a roller, etc., a curing agent for curing the one-part paint does not need to be added. The work process for curing one-component paints is reduced, and the working time can be reduced accordingly, and eco-friendly panels can be manufactured without adding a hardener such as thinner.

In addition, the urethane acrylate of the one-component paint has excellent adhesion, contamination resistance, chemical resistance, and abrasion resistance of the one-component paint printed on the panel, resulting in a flexible and strong coating film printed on the panel, and the methacrylate of the urethane acrylate. Reduced viscosity improves the properties of the urethane acrylate, has no smell and toxicity than the acrylate, convenient for the operator to work, and initiators and additives to improve the flatness and reactivity of the one-component type paint printed on the panel .

In addition, by using a sanding machine, the surface of the pattern paper printed on the panel to constantly polish the surface of the paper and to print the one-component paint and transparency to the upper side of the paper, to improve the smoothness of the surface of the finished panel coating.

Surface coating method using the one-component paint of the present invention for achieving the above object is a molding step of impregnating the shape of the melamine resin impregnated with urea resin on a panel such as wood or metal and heat press molding by pressing After the molding step, the surface polishing step of polishing the shape paper attached to the panel with a sanding machine using paper sandpaper of 180 ~ 280 times, and urethane acrylate 35 ~ 50 weight by using a silk printing apparatus or a roller and a brush on the panel %, Methacrylate is 35 to 45% by weight, initiator is 10 to 15% by weight, silicone-based additives printed one-component paint consisting of 5% by weight, after printing the one-component paint, the one-component paint Emulsion ink is blended at a weight ratio of 10: 1, and images of various shapes are printed using a silk printing apparatus or a roller and a brush. It is characterized by the completion step of completing the surface coating by spraying the transparent coating in a manner and curing while exposed to ultraviolet light.

In addition, the forming step (S1) is characterized in that the pressurized paper attached to the panel by using a press for 25 to 35 seconds at a pressure of 120 ~ 180kgf / ㎠ at 110 ~ 200 ℃.

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As described above, the surface coating method using the one-part paint of the present invention is attached to the panel of low pressure melamine impregnation paper or high pressure melamine impregnation paper on a panel such as wood and metal material, and then the middle layer, the top coat layer, etc. are placed on the upper side of the panel. When printing a one-component paint containing urethane acrylate, methacrylate, initiator, and silicone-based additives on the panel by using a silk printing device, a brush, a roller, etc., it is necessary to cure the one-component paint. The addition of a hardener does not require a work process for curing a one-component paint, as well as a reduction in working time, and there is no need to add a hardener such as a thinner, thereby producing an environmentally friendly panel.

In addition, urethane acrylate, methacrylate, initiator, and silicone-based additives added to the one-component paint improve the adhesion of each coating film of the paint printed on the panel to prevent the coating film printed on the panel from peeling off. Even if this passes, there is an advantage in that the color of the coating film is prevented from being changed and the surface of the coating film printed on the panel can be smoothed.

In addition, the time for curing the one-component paint is shorter than that of commonly used ultraviolet paint, which shortens the curing time of the one-component paint and the transparent paint on the panel, as well as a curing agent such as a thinner for curing the one-component paint. When printing and curing one-component paints on the panel, there is no need to add lamps, which reduces the odors and toxicities that occur, and thus makes it easier for workers to work and reduce the environmental pollution caused by toxicities. There is an advantage to reduce.

In addition, by using a sanding machine to print the shape paper printed on the panel to a constant surface of the paper and to print a one-component paint and transparency to the upper side of the paper, there is an advantage that the smooth surface of the panel surface is finished surface coating.

Surface coating method using the one-part coating of the present invention for achieving the above object is a molding step (S1) and the forming step of attaching the shape paper formed by low-pressure melamine impregnated to a panel such as wood or metal material After step (S1), the surface polishing step (S10) for polishing the shape paper attached to the panel with a sanding machine using paper sandpaper of 180 ~ 280, and urethane acrylate 35 using a silk printing apparatus or a roller and a brush on the panel ~ 50% by weight, methacrylate is 35 to 45% by weight, initiator is 10 to 15% by weight, silicone-based additives printed one-component paint consisting of 5% by weight, and after printing the one-component paint, Pearl ink is mixed in a one-component paint in a weight ratio of 10: 1, and images of various shapes are printed using a silk printing apparatus or a roller and a brush. The printing step (S20), and after the printing step (S20), the curtain on the panel Cotton room The cured coating while ejecting the transparent and exposed to ultraviolet light consists of a complete step (S30) to complete the surface coating.

Hereinafter will be described the most preferred embodiment of the present invention.

First, a low pressure melamine impregnated paper (lmp) generally used for panels such as wood and metal to be painted by the user is printed by using a press. (S1)

Here, low-pressure melamine impregnated paper is a gravure printing on paper (one of the concave plate printing by the photo-making method, which represents the degree of light and dark, such as photographs and pictures according to the thin and thick ink layer, suitable for multi-color printing, high-speed, large-scale printing It is suitable, and the printing method used for the printing of cellophane, vinyl, tin, etc.) to make a shape paper, and is a molding resin sheet impregnated with the melamine resin in the shape paper.

In addition, when printing the pattern paper on the panel, it is preferable to form the pattern paper by heat press for 25 to 35 seconds at a pressure of 120 ~ 180kgf / ㎠ at 110 ~ 200 ℃.

Thereafter, the panel on which the paper is printed is placed on a sanding machine to polish the surface of the paper.

At this time, the abrasive paper used in the sanding machine is generally used sandpaper (cloth or paper coated with a soft powder such as diamond steel, glass powder, quartz, etc., used to wipe the rust of the iron or to polish the porridge of the object). The surface of the pattern paper printed on the panel is polished by using No. 180 ~ 280 (the higher the number, the smaller and softer the particle size).

Then, a one-component paint mixed with urethane acrylate, methacrylate, initiator, and silicone-based additives is printed on the entire panel by using a silk printing apparatus, a roller, or a brush on the entire panel on which the pattern paper is printed. (S20)

In addition, the shape paper before the melamine resin is impregnated to use a shape paper formed by 50 ~ 110g weight.

The reason for using the shaped paper formed in the 50 ~ 110g weight as described above is to ensure that the melamine resin is optimally impregnated in the shape paper when the melamine resin is impregnated in the paper.

In addition, the one-component paint may be blended in various% ratios of urethane acrylate, methacrylate, initiator, silicone-based additives, but the urethane acrylate 35 to 50% by weight, the monomer is 35 to 45% by weight, the initiator 10 to 15% by weight, silicone-based additives are blended in 5% by weight so that each paint exhibits optimal properties.

Here, the urethane acrylate (the oligomer has various kinds, but in the present invention, the urethane acrylate is used) is an isocyanate (used for plastic, adhesives, etc.) group and a hydroxyl group of the monomer (a monovalent group represented by -OH, an organic substance It is also called a hydroxyl group and is a compound that exists as a free radical having a short lifespan by discharge of high temperature steam, but is usually stabilized in the bond state with other atoms: Hydroxyl), and the isocyanate has no benzene ring. It is the simplest of HDI (Hexamethylene Diisocynate) or methyl group (It is the case of removing one hydrogen atom of methane or combining with other substituent). It is a hydroxyl group in highly reactive Isophorone Diisocynate. By reacting with methacrylate to impart If it is cured while being excellent in complexing, staining resistance, chemical resistance and abrasion resistance, the coating film becomes flexible and strong.

In addition, the methacrylate (methacrylate: one of the monomers) uses isobonyl methacrylate (IBMA) or hydroxyethyl methacrylate (hydroxyethyl methacrylate: HEMA), and has a methyl (methyl) group Because of its low smell and toxicity, it has excellent water resistance (resistance against moisture).

In addition, when the urethane acrylate and methacrylate are blended, the methacrylate lowers the viscosity of the urethane acrylate, thereby improving the adhesion of the urethane acrylate, and a comprehensive inhibitor, an anti-film agent, an internal and external drying agent. When added, the color of the urethane acrylate does not change, and when bonding other materials (Silane coupling agent: different adhesion strength is significantly changed depending on polarity, nonpolarity, affinity and repulsion, etc. The functional silanes have organic functional groups that combine with organic materials and hydrolyzable groups that react with inorganic materials in the same molecule to combine organic materials and inorganic materials. It is used to improve the properties, etc. It also improves the slipping, leveling, wetting, water resistance and adhesion of paints. Hitting can be added to is added to improve the pre-processing of the pigment) to be more excellent in the surface property of the coated film that is printed on the adhesive, and the panel of the low-pressure melamine impregnated paper and attached to the panel.

In addition, the initiator is a substance that forms an active radical in a medium containing a monomer (a substance having a small molecular weight as a unit constituting a polymer compound or a compound) to cause a polymerization reaction, such as benzoyl peroxide, avin, etc. It absorbs energy.

The silicon-based additive is an additive generally used to remove bubbles or the like generated on the surface of the coating film printed on the panel or to improve the surface quality of the coating film.

After attaching the low pressure melamine-impregnated paper to the panel as described above and printing the one-component paint, the one-component paint provides excellent adhesion between the low-pressure melamine-impregnated paper and the one-component paint and the transparent paint to be described later. Even after this, each paint and the low-pressure melamine impregnated paper will not be peeled off the panel, and the curing time of the one-component paint and the transparent paint can be reduced.

Meanwhile, the low pressure melamine-impregnated paper is attached to the panel, and after the one-component paint is printed, the paint containing the one-component paint and the pearl ink in a ratio of 10: 1 to the upper portion of the one-component paint is applied to the silk printing apparatus, brush, Insert images of various shapes using a roller or the like.

Here, it is obvious that the pearl ink printed on the panel is made of various colors.

Then, when the pattern paper and the one-component paint is printed on the panel, the transparent paint is sprayed on the upper side of the panel while the panel is placed and moved in the apparatus for spraying the transparent paint in the curtain cotton method.

Before the one-component paint is cured, the transparent UV paint is printed.

The panel is then exposed to UV lamps and cured to complete the work.

Here, the transparent paint printed on the panel is firmly adhered to the paper by the one-component paint and exhibits a high gloss effect.

In addition, when the UV paint, which is a transparent paint, is exposed to the UV lamp, it is cured by a one-component paint for 5 to 10 seconds, thereby reducing work time and work process for curing the UV paint.

In addition, since the pattern paper printed on the panel was polished using a sanding machine, the one-component paint and the transparent UV paint printed on the panel were printed flat.

Although the above-described embodiment has been described with respect to the most preferred embodiment of the present invention, it is not limited to the above embodiment, and it is understood that various modifications are possible within the scope without departing from the technical spirit of the present invention. It is obvious to one with ordinary knowledge.

1 is a flow chart showing the working process of the surface coating method using a one-part coating of the present invention.

Claims (5)

In the surface coating method using a one-component paint comprising a molding step (S1) for attaching the shape paper formed by low-pressure melamine impregnated paper to a panel such as wood or metal using urea resin, After the forming step (S1), the surface polishing step (S10) for polishing the shape paper attached to the panel with a sanding machine using paper sandpaper of 180 ~ 280 times; The panel is composed of 35 to 50% by weight of urethane acrylate, 35 to 45% by weight of methacrylate, 10 to 15% by weight of an initiator, and 5% by weight of an silicone-based additive using a silk printing device or a roller and a brush. Printing one-component paint, printing the one-component paint, mixing pearl ink in a weight ratio of 10: 1 to the one-component paint, and printing images of various shapes by using a silk printing apparatus or a roller and a brush. (S20); After the printing step (S20), the surface coating method using a one-component paint, characterized in that the complete step (S30) to complete the surface coating by spraying a transparent coating on the panel in a curtain cotton method and exposed to ultraviolet rays. . The method of claim 1, wherein the forming step (S1) is a one-component type characterized in that the pressing on the form paper attached to the panel at a pressure of 120 ~ 180kgf / ㎠ at 110 ~ 200 ℃ for 25 ~ 35 seconds using a press Surface coating method using paint. delete delete delete

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