KR102116078B1 - Manufacturing method of eco-friendly ink for digital priting using natural pigment - Google Patents

Abstract

The present invention relates to a method for manufacturing an eco-friendly ink for digital printing using natural color, comprising: enzymatically treating a vegetable natural dye to decompose glycosides and obtain a high purity extract (S10); Removing the sugar component by converting it into alcohol by treating the extract with yeast and obtaining a natural color (S20); First filtering the obtained natural color with a filter to separate the particle size into nanoparticles of 500 nm or less (S30); 10 to 30% by weight of separated natural color, 30 to 50% by weight of water, 15 to 45% by weight of anti-settling agent, 1 to 3% by weight of antifoaming agent, 1 to 3% by weight of thickener, and 1 to 5% of acidity regulator %, Preparing an ink by mixing and stirring 1 to 3% by weight of a preservative (S40); And secondly filtering the prepared ink with a filter to separate the particle size into nanoparticles of 500 nm or less and obtaining a final ink (S50); nanoized having effective physical properties for digital printing using natural dyes as it comprises It is characterized by being able to manufacture eco-friendly ink.

Description

Manufacturing method of eco-friendly ink for digital printing using natural color {MANUFACTURING METHOD OF ECO-FRIENDLY INK FOR DIGITAL PRITING USING NATURAL PIGMENT}

The present invention relates to a method for manufacturing an eco-friendly ink for digital printing using natural color, and more specifically, by using natural color extracted from natural vegetable dyes to construct an eco-friendly ink having nano-particulated properties suitable for DTP. It relates to a technology that produces a digital printing material that is harmless to humans and harmless to a human body different from a conventional chemical dye.

In general, digital textile print is a convergence technology that combines digital printing technology with printing technology to produce a printed fabric of desired design and color by printing fabric and printing ink using computer and DTP software. do.

Conventional analog printing technology is not only difficult to guarantee consistent quality because the method of dye mixing, printing screen production, etc. is made by hand, but also chemicals such as various treatment agents in the repeated washing process for heat treatment and dye settling of the printing fabric. As it is released, it causes serious environmental pollution problems.

On the other hand, digital printing is a technology that has recently been in the spotlight because it has the advantage of being able to shorten and quickly reduce the complicated printing process in the related art and relatively reduce environmental pollution problems.

Digital printing is largely done by pre-processing, printing, and post-processing. Looking at the schematic configuration with reference to conventionally known techniques, Korean Patent Registration No. 10-1502730 applies a coating agent for pre-treatment to the surface of the fabric for output to coat it. The pre-processing process, the output process of injecting the pre-treated fabric into a digital printing machine and spraying the dye to print the image, and processing the fabric on which the image is printed to fix the dye, wash the unfixed dye and residual foreign substances, and then dry it. It constitutes a digital printing method including a post-treatment process.

On the other hand, the ink used in the conventional digital printing has a chemical dye as a main component, for example, looking at the composition of the printing ink known from Korean Patent No. 10-0578668, monochloro (1,3,5) triazine group, Diglo (1,3,5) triazine group, trichloro (1,3,5) triazine group, vinylsulfone group, sulfatoethyl sulfone group, acrylamide group, ethyleneimine group, azide group, sulfone Ethyleneimine group, trichloropyrimidine group, monochlorodifluoropyrimidine group, chlorobenzothiazole group, dichloropyridazone group, dichloropyridazine group, dichloroquinozaline group, epoxy group or 3-carboxypyridiniotri Inkjet printing for textile printing containing 0.5 to 10% by weight of a reactive dispersion dye having a molecular weight of 800 or less having at least one reactor selected from the azine group and an organic solvent satisfying one or more of the following conditions as a solvent for dissolving the dye: Make up ink.

As another example, Korean Patent Registration No. 10-0949416 constitutes an inkjet printing ink for textile materials composed of a chlorine atom or a bromine atom, and a disperse dye having a chemical composition including a benzoyl group, a cyanoethyl group, an alkyl group, and a phenyl group.

Korean Registered Patent No. 10-1502730 (2015.03.13) Korean Registered Patent No. 10-0578668 (2006.05.12) Korean Registered Patent No. 10-0949416 (2010.03.24) Korean Patent Publication No. 10-2015-0090896 (2015.08.06)

In the digital printing ink to which the prior art is applied, a chemical dye having a chemical composition including trichloro, chlorine, and bromate is generally used.

However, since digital printing also involves a process of removing unfixed dyes with water in a post-treatment process, contamination is inevitable due to the release of chemical dyes.

In addition, in the case of a product in which the ink made of a conventional chemical dye is printed with a DTP method on a textile material or the like, the possibility that chemical residues can be continuously and minutely detected even in the process of use cannot be excluded, which may have a harmful effect on the human body. It implies

In addition, when a general natural dye is used as the ink for DTP, it is difficult to realize the standard color of CMYK, which is the basic color for digital printing, and it is inevitable that the occurrence of smearing or lumping peculiar to natural dye is inevitable, or the printing quality is deteriorated. It is not suitable for use as an ink for DTP due to problems such as easily deteriorating and causing damage.

Therefore, it is urgent to develop an eco-friendly ink having physical and chemical properties required for DTP dyes while minimizing the use of chemical compositions harmful to the human body or the environment.

Therefore, in the present invention, the present invention was solved to solve the problems of the prior art as described above.

Degrading the glycosides by enzymatic treatment with vegetable natural dyes to obtain a high purity extract (S10);

Removing the sugar component by converting it into alcohol by treating the extract with yeast and obtaining a natural color (S20);

First filtering the obtained natural color with a filter to separate the particle size into nanoparticles of 500 nm or less (S30);

10 to 30% by weight of the separated natural color, 30 to 50% by weight of water, 15 to 45% by weight of anti-settling agent, 1 to 3% by weight of antifoaming agent, 1 to 3% by weight of thickener, and 1 to 5 of acidity regulator Preparing an ink by mixing and stirring 1% to 3% by weight of preservatives (S40); And

The second step of filtering the prepared ink with a filter to separate the particle size into nanoparticles of 500 nm or less and obtaining a final ink (S50); thereby producing nanoized eco-friendly ink having effective physical properties for digital printing. With DTP, it is possible to achieve the goal of producing high-quality, eco-friendly digital prints.

The present invention has an advantage of manufacturing an eco-friendly ink having physical and chemical properties suitable for DTP by using natural pigment extracted from natural dyes to solve the problems of the conventional DTP ink made of chemical dyes.

Therefore, the present invention significantly improves the stability, durability, and color fastness of the ink as it is made to produce nano-inks suitable for DTP using natural pigments, while soft and natural, unique to natural pigments when digitally printed using natural and synthetic fibers. It is possible to provide eco-friendly ink capable of expressing elegant colors or fine patterns.

In particular, the present invention can replace the conventional DTP ink made of a chemical dye, and can be used as it is in an existing method of use, as well as problems such as damage to the printer nozzle or deterioration of print quality due to smearing or aggregation of dye particles and generation of sediment. It has an effect that can be prevented.

In addition, the present invention can not only minimize the occurrence of contamination caused by chemical dyes in the post-treatment process of DTP prints, but also prints produced using the ink of the present invention also exclude the possibility of detecting chemical residues harmful to the human body. By doing so, it has the advantage of being manufactured with a printed fabric of safe natural color without skin irritation.

1 is a schematic flow diagram of a method for manufacturing an eco-friendly ink for digital printing using natural color according to the present invention.

Hereinafter, the configuration and operation according to a preferred embodiment of the method for manufacturing an eco-friendly ink for digital printing using the natural color of the present invention will be described in detail with reference to the accompanying drawings. In the following description, detailed descriptions of parts that can be easily implemented by those skilled in the art may be omitted. In addition, the following description is to describe the preferred embodiment for the present invention, the present invention is not limited by the following examples, it is natural that various modifications can be provided within the scope of the scope of the present invention. will be.

1 is a schematic flowchart of a method for manufacturing an eco-friendly ink for digital printing using natural color according to the present invention.

The method for manufacturing eco-friendly ink for digital printing using natural color to which the technology of the present invention is applied is configured to produce eco-friendly ink of physical properties suitable for DTP using natural color extracted from natural vegetable dyes, and is pollution-free and different from conventional chemical dyes. Note that it is related to a technology for producing a digital print that is harmless to the human body.

For this, the method of manufacturing an eco-friendly ink for digital printing using the natural color of the present invention comprises the steps of obtaining a high purity extract from natural dyes (S10), obtaining a natural color (S20), and separating it into primary natural color nanoparticles. It comprises a step (S30), ink preparation step (S40), and separating the secondary ink nanoparticles to obtain an environmentally friendly ink for final DTP (S50).

The high-purity extract obtaining step (S10) is a step of decomposing a glycoside and extracting a high-purity extract by enzymatically treating a vegetable natural salt that is a raw material of a natural color.

Natural dyes have a dye component among vegetable, animal, and mineral natural products. In the present invention, they are easier to collect and supply raw materials than animal and mineral dyes, and in particular, vegetable natural dyes that can exhibit various functional benefits beneficial to the human body depending on the characteristics of the material. Use

Vegetable natural dyes can be used by extracting dye components from the roots, stems, leaves, flowers, and fruits of plants, and there are hundreds of natural dyes in the plant world.

In the present invention, as a vegetable natural dye having a pigment component as close as possible to the CMYK color for DTP, for example, the blue (C) dye, the red (M) dye safflower, pine, freckle, and yellow (Y) dye Yellow wall, gardenia, turmeric, hwangnyeon, hwawawa, purple dyes such as self-grown, blueberry, grape, brown dyes persimmon, cloves, chestnut, crown, mulberry, black dyes baejaja, buckthorn, etc. To use. Black may be produced by mixing the red-based root and C, M, Y. Since digital printing printers generally use 6 colors, 8 colors, and 12 colors, various color values can be derived from the dyes and combinations thereof.

The dye components contained in vegetable natural dyes, such as indican contained in indigo leaf, genipine contained in gardenia, anthocyanin contained in grapes, and tannin contained in persimmon exist in the form of pigment glycosides, acid, It is hydrolyzed by alkali or proteolytic enzymes and separated from sugars.

Therefore, in the step of obtaining the high-purity extract (S10), a high-purity extract is extracted by treating an enzyme reacting with a corresponding glycoside with a natural dye of a desired color.

For example, the blue-based (C) side extracts a high-purity extract enriched in pigment components by hydrolyzing the fibrin tissue, other proteins, and fat components contained in the vegetable celestial salt material by treating the glucose-degrading enzyme. Red-based (M) safflower is polychromatic, so first, the red pigment required for organic solvent is layer-separated and then hydrolyzed by treating amylase and protease-based enzymes. Since the yellow (Y) gardenia has monochromaticity, it extracts high-purity extracts for each color by hydrolysis by treating cellulase or hemicellulase-based enzymes.

The step of obtaining the natural color (S20) is a step of treating the high-purity extract with yeast to convert the sugar component into alcohol to remove the natural color.

Since the high-purity extract extracted as described above contains polysaccharide components such as glucose, it is subjected to a fermentation process in which Saccharomyces-based yeasts having strong alcohol fermentation power are added and the yeast is activated and deactivated over several days to months. Through the fermentation process, a selective catalytic action is induced on the polysaccharide contained in the high-purity extract, which is converted to alcohol such as methanol and ethanol to be removed and natural color is obtained. More specific enzymes and catalytic reaction mechanisms for each yeast will be confirmed through conventional well-known techniques and will be omitted below.

On the other hand, the primary nanoparticle separation step of separating the natural pigment particles (S30) is a step of first filtering the natural pigment obtained as above with a filter to separate the particle size into nanoparticles of 500 nm or less.

The natural color obtained as described above is dissolved after adding water and a solvent at a certain ratio to form a desired color value and physical properties. In particular, in order to manufacture with a digital printing ink as in the present invention, print quality is reduced or printed. The dissolution of aggregates or sediments, which are the main causes of device failure, should be excluded.

In particular, by nano-saturating the natural pigment particles used in DTP inks, the pre- and post-processing process for digital printing is significantly shortened, and the application width of textile materials is greatly expanded, as well as in color quality, color fastness, and durability of ink. Significant qualitative improvement can be achieved.

Therefore, in this step (S30), a natural filter obtained as described above is primarily filtered through a nanofilter made of carbon nanotubes, nanofibers, or a membrane filter to separate only natural pigments composed of particles of 500 nm or less.

The ink preparation step (S40) comprises 10 to 30% by weight of separated natural color, 30 to 50% by weight of water, 15 to 45% by weight of anti-settling agent, 1 to 3% by weight of antifoaming agent, and 1 to 3% by weight of thickener Wow, it is a step of preparing an ink by mixing and stirring 1 to 5% by weight of an acidity regulator and 1 to 3% by weight of a preservative.

The anti-settling agent is added to suppress the formation of aggregates or sediments that may be generated during long-term use and improve the flowability of the ink even through the first filtration as described above. The anti-settling agent uses one selected from propylene glycol, ethylene glycol, diethylene glycol, and glycerin, and if it is out of the above range, it shortens the life of the ink or printing device or significantly decreases DTP printing quality due to smearing or clumping phenomenon. Can, so comply with that scope.

The antifoaming agent is added to prevent deterioration of print quality due to the presence of air bubbles or pinholes that may occur in the ink coating film during printing and drying. It is appropriate to use an alcohol-based organic solvent such as ethanol.

The thickener is added to increase and stabilize the viscosity and adsorption properties of the ink. The thickener uses one selected from carrageenan, chitosan, alginic acid, guar gum, and carboxymethylcellulose.

The carrageenan (or carrageenan) is a viscous polymer material of acidic polysaccharide extracted from red algae and chitosan is a material of basic polysaccharide extracted from crustaceans. Alginic acid is an acidic polysaccharide material extracted from seaweed and guar gum is a neutral polysaccharide material extracted from the endosperm of guar seeds, and can be selected by considering the type and dissolution characteristics of the dye used in natural color.

When the amount of the thickener added is outside the above range, the flowability of the ink may be degraded, making it unsuitable for the ink properties for the digital printing apparatus, or when the ink absorption and adsorption power is relatively low compared to paper, the pattern cannot be expressed. Can, so comply with that scope.

The acidity adjusting agent adjusts the pH of the ink using an acid or alkali agent such as sodium hydroxide. In the present invention, since it is configured to produce an eco-friendly ink for printing DTP containing a plant natural color, since there is a difference in pH to effectively express each color of CMYK according to the type of dye, alkali or acid according to the type and color of the dye The acidity is adjusted by treatment.

The preservative is added to prevent the ink containing natural color from being deteriorated by microorganisms or fungi. The preservative is configured to minimize the use of harmful chemicals using one selected from sodium benzoate, sodium diacetate, parahydroxybenzoic acid ester, golden extract, peony root extract, and grapefruit extract.

On the other hand, the second nanoparticle separation step (S50) is a step of secondarily filtering the ink prepared with the above components with a filter to separate the particle size into nanoparticles of 500 nm or less and obtain the final ink.

Although the nanoparticles of the natural pigment particles were made through the primary nanoparticle separation step (S30) described above, physical properties of the ink may be changed due to the additives added in the step (S40) of preparing the ink. Therefore, in this step (S50), the ink prepared as described above is filtered again through a nano filter made of carbon nanotubes, nanofibers, etc., thereby obtaining a final eco-friendly ink nano-sized below 500 nm.

The method of using the ink produced according to the method for manufacturing an eco-friendly ink for digital printing using natural color according to the present invention as described above will refer to the well-known digital printing technology. Hereinafter, the effects of the present invention will be described. same.

First, the present invention is to prepare an environmentally friendly ink having physical and chemical properties suitable for DTP using natural pigments extracted from vegetable natural dyes.

Accordingly, the present invention is to provide an eco-friendly ink capable of expressing a soft, natural and elegant color expression or fine patterns unique to natural colors when digitally printed using natural fibers and synthetic fibers compared to conventional chemical dyes.

In particular, as the present invention is made to manufacture nano-ink suitable for DTP, it can replace the conventional DTP ink made of chemical dyes and use it as it is, as well as significantly improve the stability, durability, and color fastness of ink. It is effective to prevent problems such as damage to the printer nozzle or deterioration of print quality due to smearing or aggregation of dye particles and generation of sediment.

Accordingly, the problems of the DTP ink made of the conventional chemical dyes are minimized, for example, the occurrence of contamination caused by the chemical dyes, and the printed matter produced by the DTP method using the ink of the present invention also detects chemical residues harmful to the human body. There are various advantages, such as making it possible to manufacture a safer natural dye printing fabric by excluding the possibility.

Not applicable.

Claims (2)

Degrading the glycosides by enzymatic treatment of vegetable natural dyes and obtaining a high purity extract (S10);
Removing the sugar component by converting it into alcohol by treating the extract with yeast and obtaining a natural color (S20);
First filtering the obtained natural color with a filter to separate the particle size into nanoparticles of 500 nm or less (S30);
10 to 30% by weight of the separated natural color, 30 to 50% by weight of water, 15 to 45% by weight of anti-settling agent, 1 to 3% by weight of antifoaming agent, 1 to 3% by weight of thickener, and 1 to 5 of acidity regulator Preparing an ink by mixing and stirring 1% to 3% by weight of preservatives (S40); And
Secondary filtration of the prepared ink with a filter, separating the particle size into nanoparticles of 500 nm or less and obtaining a final ink (S50); manufacturing eco-friendly ink for digital printing using natural color, comprising: Way. According to claim 1,
The anti-settling agent uses one selected from propylene glycol, ethylene glycol, diethylene glycol, and glycerin,
The thickener uses one selected from carrageenan, chitosan, alginic acid, guar gum, carboxymethylcellulose,
The preservative is a sodium benzoate, sodium diacetate, parahydroxybenzoic acid ester, golden extract, peony root extract, grapefruit extract using a natural color, characterized in that one selected from the use of natural dyes eco-friendly ink manufacturing method.

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