KR100699283B1 - Embodiment method of color pattern for a three-dimensional curved surface - Google Patents

Abstract

A method for forming color patterns on a three-dimensional curved surface is provided to simplify the print process of a three-dimensional curved resin molded article and cut down the cost by excluding a transfer process and to secure high print quality by forming the color patterns by directly developing the three-dimensional curved surface. The method for forming color patterns on a three-dimensional curved surface comprises the steps of: applying and drying first photographic emulsion(11) on a three-dimensional object(10); bringing a masking film of the firstly selected color chosen from yellow, magenta, and cyan masking films, into contact with the object, exposing the film to the light, and then cleaning the film; depositing the colorant of the firstly selected color by spraying and drying the colorant on the firstly etched film and then separating the residual emulsion part; applying and drying second photographic emulsion(13) on the object; bringing the masking film of the secondly selected color chosen from the yellow, magenta, and cyan masking films, into contact with the object coated with the second photographic emulsion, exposing the film to the light, and then cleaning the film; depositing the colorant of the correspondent color by spraying and drying the colorant on the secondly etched film and then separating the residual emulsion part; applying and drying third photographic emulsion on the object; bringing the masking film of the third color into contact with the object coated with the third photographic emulsion, exposing the film to the light, and then cleansing the film; and depositing the colorant of the third color by spraying and drying the colorant on the thirdly etched film and then separating the residual emulsion part. The yellow, magenta, and cyan masking films perfectly correspond to the curved surface of the three-dimensional object by vacuum-pressing and forming a soft vinyl bag.

Description

Embodiment method of color pattern for a three-dimensional curved surface}

1 is a process flowchart of a method for implementing a 3D curved color pattern according to the present invention.

2 is a cross-sectional view illustrating a process of depositing color pigments on a coating film according to the present invention.

* Explanation of symbols for main parts of drawings *

10: subject 11,13: photosensitizer

12,14: pigmentation layer 15: red layer

The present invention prevents discoloration and erasure of color patterns embodied in a printed object by directly depositing water-soluble pigments of yellow, magenta, and cyan colors on the surface of a plastic molding having a three-dimensional thermoplastic resin or a thermosetting resin. It relates to a method of implementing a three-dimensional (3D) curved color pattern in a simple manner.

When a predetermined pattern is embodied on a printed object having a three-dimensional curved surface, a pattern is usually printed on a pad of a silicon material, a rubber material, or a metal material, and then a pressure is transferred to correspond to the curved surface of the printed material.

In the conventional curved printing technique, when a predetermined pattern is transferred to a metal pad, the pattern is corroded to be engraved to a certain depth on a flat metal plate surface to form an intaglio, and the printing ink is applied to the entire surface of the metal plate. The ink is left only in the recessed part which is engraved by pushing the surface of the metal plate, and then pressurized pad made of elastic material such as silicone or rubber on the surface of the metal plate transfers the ink having the predetermined pattern remaining in the recessed part to the pad. By pressing the transfer again along the curved surface of the printed object, the desired pattern can be printed on the printed object having the 3D curved surface.

However, the surface printing of the printed object according to the conventional curved printing technique is that the printing ink is applied to the surface of the printed object with a certain thickness, so that it is easily peeled off by external friction or causes a change in color over time. do.

The problems such as damage and discoloration of the printing surface due to frictional force could be partially covered by coating a transparent protective layer on the surface after 3D curved printing, but the protective coating layer is also applied on the printed pattern of the printed object, so that external force is applied. After a while or over time, the protective layer loses its function, and thus, the printed pattern of the printed object has a limited lifetime.

In particular, the surface pattern printing on the 3D curved object by the conventional printing method is a complicated process because it goes through a series of transfer process, and also shows the disadvantage that can not expect the accurate color pattern printing.

The present invention is to solve the problems of the prior art as described above, an object of the present invention is to directly deposit a water-soluble pigment on the surface of a plastic molding, such as a three-dimensional thermoplastic resin or thermosetting resin to remove various color patterns that are not erased or discolored The present invention provides a method of implementing a three-dimensional curved color pattern that can be implemented on a 3D curved printed object.

Another object of the present invention is to form a full color pattern directly on the surface of the printed object to obtain a high-quality printing quality can increase the value of the product, the cost can be reduced according to the simplified process and free from any curved surface It is to provide a three-dimensional (3D) curved color pattern implementation method that can represent a high-resolution full color pattern.

The method of implementing the 3D curved color pattern of the present invention for achieving the above object is a step of coating and drying the first photosensitive emulsion on the subject, the primary photosensitive emulsion is coated and dried on the subject color-decomposed yellow, magenta And a first etching step of exposing and washing the masking film of the first selected color among the cyan color masking films, and spraying and drying the dye of the first selected color on the first etched coating film to dry the corresponding dye. Depositing the remaining emulsion part after depositing, coating and drying the second photosensitive emulsion on the subject, and yellow, magenta, and cyan color primary color-decomposed to the coated and dried subject. The second etching step of exposing and washing the masking film of the second selected color of the masking film of the film, and the pigment of the second selected color on the second etched coating film Coating and drying to deposit the pigment, and then removing the remaining emulsion part; coating and drying the tertiary photosensitive emulsion on the subject; and subjecting the third photosensitive emulsion to the coated and dried subject. In the yellow, magenta, and cyan color masking film, the third etching step of exposing and washing the masking film of the remaining color in close contact, and the pigment of the remaining color on the third etched coating film are sprayed and dried to apply the dye. And depositing the remaining emulsion portion after deposition, and optionally subjecting the top coating to protect the yellow, magenta and cyan pigmented layers of the coating film.

The three primary colors of light are red, blue and green, and the three complementary colors of light (three primary colors of light) are magenta (complementary colors of green light) and cyan (red light). Complementary color) and yellow (complementary color of blue light).

The cyan is made of a mixture of green light and blue light, which are the remaining three primary colors except for red light, and magenta is made of a mixture of red light and blue light, which is the remaining three primary colors except green light, and yellow is made of the red and green light of the remaining three primary colors except blue light. It is made of a mixture.

The three primary colors and the three complementary colors of light show that the mixing of the three primary colors of the light is an additive mixture, which produces white light during the same rate mixing, and the mixing of the three primary colors of the color produces a black color when the same ratio mixing is a subtractive mixing. Each of the three primary colors of light (red-cyan, green-magenta, blue-yellow) absorbs the three primary colors, so cyan blocks red light, magenta blocks green light, and yellow blue. Retards penetration.

The three primary colors of magenta, cyan, and yellow are the most basic colors, and they have unique colors that cannot be mixed with any color. When these three primary colors are combined, all three colors can be made. Mixing together to create different colors is called subtraction mixing.

By using the characteristics of the three primary colors of the above color can express the desired color pattern, in the present invention, based on this theory, the water-soluble pigment penetrates the inside of the object permanent 3D curved full color without fear of wear or discoloration Disclosed is a direct printing technique of a pattern.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a process flowchart of a method for implementing a 3D curved color pattern according to the present invention, and FIG. 2 is a process cross-sectional view for explaining a process of depositing color pigments on a coating film according to the present invention.

As referred to herein, the primary photosensitive emulsion 11 is first coated on the subject 10, which is a plastic molded article such as a thermoplastic resin or a thermosetting resin having a 3D curved shape.

The primary photosensitive emulsion 11 applied to the subject 10 is dried in a tunnel-type dark room.

A masking film of the first selected color (for example, yellow) among the masking films of yellow, magenta, and cyan color, which have been primary color separated for the color pattern to be printed on the subject, is closely adhered to the molded object, and then exposed using ultraviolet light or the like. After washing, the first photosensitive emulsion (photoresist) is washed.

Here, the forming process is preceded to completely adhere the masking film to the 3D curved object, which is formed by using a vacuum soft vinyl bag (eg, TPU ^{(Temperature Polyurethane)} bag). A vacuum pressing process is performed so that the masking film is completely adhered along the curved surface, and through this process, a masking film formed in the same shape as the object can be made and UV exposure is performed for etching using the masking film.

The masking film formed by the vacuum compression method is completely adhered along the curved surface of the object having the 3D curved surface, thereby preventing contamination of the color pattern implementation.

In particular, prior to the forming of the masking film for each color, a pattern is formed by decomposing the color patterns to be implanted into the corresponding printed matter by primary colors using laser and screen techniques.

After the first etching process through the exposure and washing process to the primary photosensitive emulsion, the dye of the first selected color (for example, yellow) is sprayed onto the etched coating film, and then heated and dried to correspond to the surface of the subject. Deposit the pigment.

The pigment of the first selected color used at this time does not contain a resin as a water-soluble pigment, and includes a penetrant, a surfactant, a dispersant, and the like which promote the penetration into the subject. In addition, heating is carried out in the IR oven to deposit the pigment.

By this process, the pigment deposition layer 12 of the first color (for example, yellow) is produced.

Thereafter, the remaining emulsion portion is removed after pigmentation of the first color.

Subsequently, a pigmentation process of the second color (eg magenta) of the same process as above is carried out.

The second photoresist 13, which is a photoresist, is coated and dried on the subject 10 on which the pigment of the first color is deposited.

Next, the second photosensitive agent 13 is coated and dried on a subject to which the masking film of the second selected color (for example, magenta) among the masking films of yellow, magenta and cyan color, which have been primary color-decomposed, is exposed and exposed and washed. Second etching is performed.

The pigment of the second selected color (for example magenta) is spray-coated and heated on the coating film which has undergone the above secondary etching process to form a pigmentation layer 14 for the color.

The pigment of the second selected color is also a water-soluble pigment which does not contain a resin component as in the first one, and contains a penetrant and a surfactant for promoting the penetration into the subject.

At this time, the third color formed by mixing them on the subject 10 of the portion where the pigmentation layer 12 of the first color (yellow) and the pigmentation layer 14 of the second color (magenta) overlap. A color (eg, red layer 15) is produced.

Thereafter, the remaining emulsion portion is removed after pigmentation of the second color.

Next, after coating and drying the tertiary photosensitive emulsion on the subject, the masking film of the third selected color (for example, cyan) among the masking films of yellow, magenta and cyan color previously decomposed primary colors is exposed and exposed and washed. 3rd etching is performed.

The coating film formed by the above-described third etching is spray-coated and heat-dried a pigment of the third selected color (for example, cyan) to form a pigmentation layer for that color.

The dye of the 3rd selected color is also a water-soluble pigment | dye which does not contain a resin component similarly to the 1st and 2nd.

Accordingly, the color pattern by mixing the pigment layer of the first color (yellow), the pigment layer of the second color (magenta) and the pigment layer of the third color (cyan) on the printed body having a 3D curved surface. Is implemented.

Thereafter, the remaining emulsion portion is removed after the third color pigmentation, and top coat is performed to protect the dye layer expressing the color pattern. The top coat is a selective process and performs a function of a protective layer to protect the color patterns generated by the mixing of each color pigment.

As described above, the present invention can directly implement various color patterns that are not erased or discolored by infiltrating a water-soluble pigment on the surface of a 3D curved plastic molding molded with a thermoplastic resin or a thermosetting resin, thus eliminating a separate transfer process. The unique effect of simplifying the printing process and reducing the cost of 3D curved resin molding is shown.

In addition, the present invention forms a color pattern on the 3D curved surface of the object by the direct development method, so that high quality printing quality can be obtained, thereby increasing the value of the product.

In addition, the present invention, unlike the conventional curved surface printing method is a relatively simple process and enables the implementation of a free high-resolution color pattern on any curved surface.

Claims (3)

Coating and drying the primary photosensitive emulsion on the three-dimensional object, and firstly selecting a masking film of yellow, magenta, and cyan color obtained by primary color separation of the primary photosensitive agent coated and dried on the coated object. A first etching step of exposing and washing the color masking film in close contact, a step of spray coating and drying a pigment of the first selected color on the first etched coating film and depositing the dye to remove the remaining emulsion part; And coating a second photosensitive emulsion on the subject, followed by drying, and masking a second selected color among yellow, magenta, and cyan color masking films of which the second photosensitive agent is coated and dried on the coated subject. The second etching step of closely contacting the film, exposing and washing the film, and spraying and drying the pigment of the second selected color on the second etched coating film to immerse the dye. After removing the remaining emulsion part, coating the subject with a tertiary photosensitive emulsion and drying the coated emulsion, and yellow, magenta and cyan color-decomposed to the coated and dried subject. The third etching step of exposing and washing the masking film of the remaining color in close contact with the masking film of the color, and spraying and applying the dye of the third color to the third etched coating film and dried to deposit the corresponding pigment and remaining emulsion part Forming a color pattern on the three-dimensional object through the step of removing the film, the masking film of the yellow, magenta and cyan color of the primary color separation of the pattern using a soft vinyl bag to match the curved surface of the three-dimensional object Three-dimensional curved color pattern implementation method characterized in that the vacuum compression forming. The method of claim 1, wherein the yellow, magenta, and cyan color pigments are water-soluble dyes that do not contain a resin. The method of claim 1, wherein the soft vinyl bag is TPU white.

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