KR100662513B1 - Method of forming Color Pattern in Polymer Substrate - Google Patents

Abstract

A method of forming a color pattern in a polymeric material is disclosed. Pigments having a predetermined color are penetrated into the polymer material from the polymer material surface. The penetration of the dyes is carried out by a permeable dispersion solution in which the penetrant and the organic solvent are mixed. A yellow paint layer, a cyan paint layer or a magenta paint layer sequentially penetrate into the polymer material, and the penetrated paint layer is irradiated with a laser. The dye molecule having a specific absorption wavelength is broken by a laser having a specific wavelength, and the bond is broken and a color pattern is formed.

Description

Method of forming color pattern in polymer substrate}

1 is a cross-sectional view showing a state in which a pigment is formed on a surface of a polymer material according to the prior art.

2 is a cross-sectional view of a laminated structure in which a color pattern is formed according to a preferred embodiment of the present invention.

3 is a cross-sectional view of a laminated structure for explaining a process in which a predetermined pattern is formed inside a polymer material according to a preferred embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

200, 300: polymer material 220: paint layer

310: yellow paint layer 320: cyan paint layer

330: magenta paint layer

The present invention relates to a method of forming a color pattern on a polymer material.

Typically, the method of forming color in the polymer material is divided into two.

The first is a method of melting a polymer material together with a pigment and then molding and solidifying the polymer material. When the above method is used, only one color of the polymer material having a predetermined shape is expressed.

Second, a pigment and an adhesive are mixed with the molded and solidified polymer material surface and plotted on the polymer material surface. The above method can also implement only one color in the polymer material. In addition, depending on the external environment such as moisture, heat, etc., there is a problem that the film quality of the pigment and the adhesive is separated from the surface of the polymer material.

1 is a cross-sectional view showing a state in which a pigment is formed on a surface of a polymer material according to the prior art.

Referring to FIG. 1, the paint film 120 is formed on the surface of the polymer material 100. The paint film 120 includes a pigment 122 and an adhesive 124. That is, in the case of forming the film with only the pigment 122, the pigment 122 does not sufficiently adhere to the surface of the polymer material 100 and is easily separated from the surface of the polymer material 100. Thus, the pigment 122 is mixed with the adhesive 124 to prevent the pigment 122 from leaving the polymer material 100 surface. In addition, the mixed pigment 122 and the adhesive 124 is dissolved in an organic solvent to form a mixed liquid.

When the mixed solution is sprayed on the surface of the polymer material in a gaseous state or a liquid state, an organic solvent is volatilized, and a coating film 120 in which the pigment 122 and the adhesive 124 are mixed is formed on the surface of the polymer material 100.

However, the paint film 120 formed through the above-described process has a disadvantage in that it is easily peeled from the surface of the polymer material by temperature and mechanical external force. In addition, when moisture penetrates between the paint film 120 and the surface of the polymer material 100, this peeling phenomenon is further promoted. In order to compensate for the above-described disadvantages, a separate resin layer may be formed on the paint film 120 formed on the surface of the polymer material 100 to protect the paint film 120. However, the resin layer may protect the paint film 120 to some extent from mechanical external force due to external environmental factors, but cannot prevent the peeling of the paint film 120 due to temperature or moisture.

An object of the present invention for solving the above problems is to provide a method for penetrating the pigment into the polymer material, forming a pattern.

The present invention for achieving the above object, forming a permeable dispersion solution for penetrating the pigment into the polymeric material; Mixing the dye with the permeable dispersion solution; Penetrating the dye from the surface of the polymer material to a predetermined region to form a paint layer; And forming a pattern by irradiating the coating layer with a laser to form a pattern.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Example

2 is a cross-sectional view of a laminated structure in which a color pattern is formed according to a preferred embodiment of the present invention.

Referring to FIG. 2, the stacked structure in which the color pattern is formed includes the polymer material 200 and the paint layer 220 penetrated to a predetermined depth from the surface of the polymer material 200.

The polymer material 220 is classified into a natural polymer material and a synthetic polymer material, and the synthetic polymer material is synthetic resin or synthetic rubber.

The synthetic resin includes a thermosetting resin and a thermoplastic resin.

The thermosetting resin has a net-like structure, does not melt in the solvent and does not melt by heat. In addition, heat resistance and solvent resistance are generally good, and excellent mechanical strength can be obtained when filler is added. The thermosetting resins include phenol resins, urea resins, melanin resins, alkyd resins, polyester resins, silicone resins, epoxy resins, urethane resins, and fran resins.

Thermoplastic resins have the property of plastic deformation upon heating and reversibly hardening upon cooling. The thermoplastic resin has a chemical structure composed of linear or branched polymers. In addition, there is an advantage that it is efficiently processed by extrusion molding, injection molding, but the disadvantage is that the heat resistance, solvent resistance is weak compared to the thermosetting resin. Thermoplastic resins include acrylic resins, vinyl chloride resins, vinyl acetate resins, vinylacetyl resins, methylmethacryl resins, polystyrene resins, polyamide resins, and celluloid resins.

Synthetic rubber is butadiene rubber, styrene butadiene rubber, acrylonitrile butadiene rubber, chloroprene rubber, isoprene rubber, isobutylene isoprene rubber, ethylene propylene rubber, ethylene vinyl acetate rubber, chlorinated polyethylene rubber, chlorosulfonated Polyethylene rubber, acrylic rubber, ethylene acrylate rubber, fluorine rubber, silicone rubber or polyurethane.

The paint layer 220 in which the dye 222 penetrates into a predetermined region is formed from the surface of the polymer material 200 made of the above-described material.

First, a permeable dispersion solution is formed. The permeable dispersion solution is formed by mixing an organic solvent and a penetrant.

As the organic solvent, hydrocarbons, halogenated hydrocarbons, alcohols, aldehydes, ethers, esters, ketones, glycol ethers, hydrocarbon disulfides, cresols and water are used.

As the hydrocarbon system, aliphatic hydrocarbons, substituted hydrocarbons, aromatic hydrocarbons and the like are used. As the aliphatic hydrocarbon, gasoline, kerosene or normal hexane is used. In addition, cyclohexanol or methylcyclohexanol is used as a substituted hydrocarbon. Moreover, benzene, toluene, xylene, etc. are used as an aromatic hydrocarbon.

As the halogenated hydrocarbon used as the organic solvent, aliphatic hydrocarbon or aromatic hydrocarbon chloride may be used. Dichloromethane, chloroform or dichloroethane may be used as the aliphatic chloride hydrocarbon, and chlorobenzene, ortho-dichlorobenzene may be used as the aromatic hydrocarbon chloride.

As alcohols, butanol, 2 butanol, isobutyl alcohol, isopentyl alcohol or isopropyl alcohol is used.

In addition, ethers may be ethyl ether, dioxane or detrahydrobutane, and esters may be methyl acetate, ethyl acetate, propyl formate, isopropyl acetate, butyl acetate, isobutyl acetate, pentyl acetate or isopentyl acetate This can be used.

Acetone, methyl ethyl ketone, methyl butyl ketone, methyl isobutyl ketone may be used as ketones, and ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monoethyl ether acetate or ethylene glycol monobutyl are used as glycol ethers. Ethers and the like can be used.

The penetrant allows the pigment 222 to be dispersed in the organic solvent, and serves to control the volatilization of the organic solvent. In addition, the polymer particles 224 present on the surface of the polymer material 200 are swelled so that the pigment 222 easily penetrates into the polymer. As the penetrant, an acidic solution or an alkaline solution may be used.

Acid solutions used as penetrants include inorganic acid solutions such as hydrochloric acid, nitric acid, carbonic acid, sulfuric acid, and hydrofluoric acid, and organic acid solutions such as formic acid, formic acid, oxalic acid, hydrogen peroxide, acetone, malic acid, citric acid, acetic acid, butyric acid, palmitic acid, and tartaric acid. There is this.

In addition, alkaline solutions used as penetrants include sodium hydroxide solution, phosphate solution, potassium hydroxide solution, ammonium hydroxide solution, bicarbonate solution, silicate solution, borate solution, copper sulfate solution, aluminum sulfate solution, silver nitrate solution, sodium acetate solution, sodium carbonate solution, Ammonia water, sodium bicarbonate solution, sodium pyrodiate solution, sodium bicarbonate, sodium silicate solution and the like.

In addition, the acid solutions and alkaline solutions listed as penetrants are merely illustrative of the scope of application of the present invention, and any acid solution or basic solution other than the listed solutions may be used.

A permeable dispersion solution composed of a penetrant and an organic solvent is used as a surfactant (Surface-Active Agent) and reduces the interfacial tension of the polymer material 200. In addition, the penetrant swells the polymer particles 224 in the surface region of the polymer material 200 so that the pigment 222 easily penetrates into the polymer material 200.

The permeable dispersion solution formed as described above is mixed with the dye 222 to form a mixed solution. Various methods may be used to penetrate the pigment 222 into the polymer material 200.

First, a mixture of the permeable dispersion solution and the pigment is deposited on the surface of the polymer material 200. That is, the liquid mixed pressure liquid may be formed into vaporized or liquid particles and supplied to the surface of the polymer material. The organic solvent evaporates from the mixed solution supplied to the surface of the polymer material 200, the penetrant disperses the pigment, and reduces the surface tension of the surface of the polymer material. In addition, the pigment 222 penetrates from the surface of the polymer material 200 swelled by the penetrant to a predetermined region.

In addition, supplying the mixed solution to the surface of the polymer material 200 may drop the mixed solution onto the surface of the polymer material 200 and may be uniformly supplied to the entire surface by using a spin coating technique using rotational force. In addition, the dye 222 may be penetrated into a part of the surface of the polymer material 200 by using a mask having a pattern formed on the surface of the polymer material 200.

Second, a pigment is formed on the surface of the polymer material 200 in a film form, and a pigment penetrates from the surface of the polymer material 200 to a predetermined region by supplying a permeable dispersion solution on the film formed in the film form. The dye is dispersed in the organic solvent by the penetrant supplied to the dye and penetrated from the surface of the polymer material 200.

In addition to the two methods described above, dipping, roll coating, die coating techniques, and the like can be used.

In addition, when the dye 222 is penetrated into the polymer material 200 using the above-described methods, an electric field may be used or heat may be used to adjust the penetration time and the amount of penetration of the dye 222.

That is, the dye 222 may be infiltrated by increasing the temperature in order to shorten the penetration time and increase the amount of penetration than when the dye 222 penetrates at room temperature. In addition, an electric field in the vertical direction may be applied to the surface of the polymer material 222 in order to shorten the penetration time and increase the penetration amount, rather than the electric field is not applied. In addition, according to the embodiment, the dye 222 can be quickly penetrated into the polymer material 200 using a laser.

The pigment 222 penetrated from the surface of the polymer material 200 is a pigment or a dye.

The dyes include disperse dyes, direct dyes, bat dyes, reactive dyes, basic dyes, acid dyes and sulfide dyes.

In addition, the pigment is a white or colored powder which is not directly soluble in water, oil, etc., and is divided into an organic pigment and an inorganic pigment. The pigment is generally used as a printing ink, paints and coloring agents such as plastics and rubber.

The organic pigments include azo pigments, phthalocyanine pigments, dye lake pigments, condensed polycyclic pigments, nitrozo pigments, alizarin lake pigments, metal complex salts, aniline black pigments, alkali blue pigments, chemical fluorescent pigments, and phosphorescent pigments.

The azo pigments include insoluble pigments, azolake pigments, condensed azo pigments, metal salt azo pigments.

In addition, the phthalocyanine-based pigment is divided into a copper phthalocyanine pigment, a halogenated copper phthalocyanine pigment, a copper phthalocyanine lake pigment and the like depending on the kind of metal to be bonded.

Dye lake pigments are divided into acid dye lake pigments and basic dye lake pigments.

Condensed polycyclic pigments include anthraquinone pigments, thioindigo pigments, perinone pigments, perylene pigments, dioxazine pigments and isoindilinone pigments.

In addition, examples of the inorganic pigments include ceramic pigments.

As described above, the dye 222 may be easily penetrated into the polymer material 200. That is, the surface of the polymer material 200 is swollen by the permeable dispersion solution, and the dye 222 easily penetrates into the polymer material 200. Accordingly, the paint layer 220 in which the dye 222 and the polymer material 224 are mixed is formed in a predetermined region from the surface of the polymer material.

3 is a cross-sectional view of a laminated structure for explaining a process in which a predetermined pattern is formed inside a polymer material according to a preferred embodiment of the present invention.

Referring to FIG. 3, pigments having yellow, cyan and magenta colors are sequentially penetrated into the polymer material 300. Formation of the paint layer by penetration of the pigments is the same as described in FIG.

The yellow paint layer 310, the cyan paint layer 320, and the magenta paint layer 330 are sequentially formed in the polymer material 300. Each paint layer has a mixture of pigments and a polymer material.

The formation of the paint layer is adjustable by the order of penetration of the pigments, the penetration time and temperature, and the like. That is, the yellow color pigment may first penetrate and then penetrate in the order of cyan and magenta. Therefore, the paint layers 310, 320, and 330 having the colors of yellow, cyan and magenta are sequentially formed from the predetermined region of the polymer material 300. The order in which the paint layers 310, 320, and 330 are formed may be changed in various ways. That is, first, a paint layer having a color of cyan or magenta may be formed.

In addition, the paint layers may be mixed. That is, pigments having yellow, cyan and magenta colors do not appear as regular paint layers, but may be mixed in one film quality.

Subsequently, a laser is irradiated to the paint layers 310, 320, and 330 formed by penetrating pigments. Irradiation of the laser breaks the molecular bonds of the pigments of a particular color, preventing the pigment of the characteristic from having a unique color. Pigments with a yellow, cyan or magenta color have a unique absorption wavelength. Therefore, a laser having an absorption wavelength suitable for each pigment is irradiated to the pigments to selectively remove the pigments among the pigments of yellow, cyan or magenta.

For example, using a CO ₂ laser whose model name is KLT laser system XLT2436, the wavelength was set to 300 nm to 500 nm, the output power was adjusted to 60 W, and the laser was irradiated to the paint layer. You can see it destroyed. In addition, it can be seen that a variety of lasers can be used to selectively remove colors having color by adjusting wavelength and output power.

Therefore, a predetermined pattern may be formed on the preformed paint layers using a laser.

According to the present invention as described above, it is possible to penetrate the pigments having a plurality of colors into the polymer material, and to implement a predetermined pattern using a laser for the penetrated pigments. Therefore, the paint layer having a predetermined pattern from the polymer material does not peel off from the polymer material and can maintain a predetermined pattern for a long time.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Claims (10)

Forming a permeable dispersion solution for penetrating the pigment into the polymeric material; Mixing the dye with the permeable dispersion solution; Penetrating the dye from the surface of the polymer material to a predetermined region to form a paint layer; And Irradiating the coating layer with a laser to form a pattern. The method of claim 1, wherein the permeable dispersion solution is a mixture of an organic solvent and a penetrant. The method of claim 2, wherein the organic solvent is a hydrocarbon-based, halogenated hydrocarbon, alcohols, aldehydes, ethers, esters, ketones, glycol ethers, hydrocarbon disulfide, cresol or water to form a pattern in the polymer material, characterized in that Way. The method of claim 2, wherein the penetrant is an acidic solution, the acidic solution is hydrochloric acid, nitric acid, carbonic acid, sulfuric acid, hydrofluoric acid, formic acid, formic acid, oxalic acid, hydrogen peroxide, acetone, malic acid, citric acid, acetic acid, butyric acid, palmitic acid and A method of forming a pattern on a polymeric material, characterized in that any one or a mixture of the group consisting of tartaric acid. The method of claim 2, wherein the penetrant is an alkaline solution, the alkaline solution is sodium hydroxide, phosphoric acid, potassium hydroxide, ammonium hydroxide, bicarbonate, silicate, borate, copper sulfate, aluminum sulfate, silver nitrate, sodium acetate, sodium carbonate, ammonia water, hydrogen carbonate A method of forming a glyph in a polymeric material, characterized in that any one or a mixture of the group consisting of sodium, sodium pyrodioxide, sodium bicarbonate and sodium silicate. The method of claim 1, wherein the forming of the paint layer comprises: A method of forming a pattern on a polymer material, characterized by sequentially forming a yellow paint layer, a cyan paint layer, and a magenta paint layer. The method of claim 1, wherein the forming of the paint layer comprises: A method of forming a pattern on a polymeric material, characterized in that it is formed by mixing pigments having a color of yellow, cyan and magenta. The method of claim 1, wherein the wavelength of the laser is substantially the same as the absorption wavelength of the pigment having the color to be removed. The dye of claim 1, wherein the dye is a disperse dye, direct dye, bat dye, reactive dye, basic dye, acid dye, sulfide dye, azo pigment, phthalocyanine pigment, dye lake pigment, condensed polycyclic pigment, nitrozo pigment, A method for forming a pattern on a polymer material, which is an alizarin lake pigment, a metal complex salt, an aniline black pigment, an alkali blue pigment, a chemical fluorescence pigment or a photoluminescent pigment. The method of claim 1, wherein the mixing of the dye and the permeable dispersion solution, Applying said pigment to the surface of said polymeric material; And Supplying the permeable dispersion solution to the applied pigment.

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