KR20180043667A - Ink composition for digital textile printing, method of manufacturing the same and digital textile printing method using the same - Google Patents

Abstract

The present invention relates to an ink composition for digital textile printing, a manufacturing method thereof, and a digital textile printing method using the same. The ink composition for digital textile printing comprises a solvent, a dye and a paste resin. The paste resin includes gums, cellulose and a binder resin. The ink composition for digital textile printing including the paste resin can clearly print without limitation of a fiber. Also, the digital textile printing using the ink composition for digital textile printing is simple and eco-friendly without a pre-treatment and a post-treatment.

Description

TECHNICAL FIELD [0001] The present invention relates to a digital printing ink composition, a method for producing the same, and a digital printing method using the same. BACKGROUND ART < RTI ID = 0.0 >

The present invention relates to an ink composition for digital printing which enables clear printing without limitation of fiber types, a method for producing the ink composition, and a digital printing method in which the process is simplified using the ink composition.

The printing is a dyeing method in which the textile material such as textile, knitted fabric, carpet, yarn, sliver, etc. is partially dyed and the pattern is dyed, so that the dyed material can be dyed with various colors. There is a difference.

The dyeing theory is the same for both printing and submerged dyeing. The dyeing solution is dipped in a dyeing solution with water as a medium, and is uniformly salted. The printing is carried out by a suitable medium, such as a coloring agent such as a dye and a pigment, a chemical agent such as a dye and a flame retardant, It is a dyeing method in which an ink is formed with a printing paste and the dye is partly colored or discolored to form a pattern and a color.

The printing method was developed from the roller printing, screen printing to sublimation printing and digital printing.

Sublimation transfer printing is a process suitable for synthetic fiber printing such as polyester using disperse dyes and is completed through the textile designing step, the outputting step on transfer paper and the heat pressing step. It is necessary to use transfer paper and it is applicable to polyester fibers only.

Digital printing, which has been attracting attention in the printing industry, has the merit that all processes from design to printing can be done with digitalizer, so that coloring and elimination of process can be omitted.

The digital printing can be applied to both synthetic fibers and natural fibers, but it is disadvantageous that the kind of ink suitable for fibers is to be replaced.

In addition, there is a contradiction that separate preprocessing processes using chemicals in fabrics and post-treatment processes such as flushing and steam are indispensable for digital printing, which is an advantage of a simplified process with no finishing or no finishing. These pretreatment and post-treatment processes also cause environmental problems such as wastewater treatment and economic cost problems.

Accordingly, it is possible to print on various kinds of fibers, and it is necessary to develop a simple printing ink without pre-treatment and post-treatment.

An object of the present invention is to provide an ink composition for digital printing which can be printed clearly without limitation of fibers.

It is still another object of the present invention to provide a process for producing the ink composition for digital printing.

It is still another object of the present invention to provide a simple and eco-friendly digital printing method using the ink composition for digital printing.

In order to attain the above object, the present invention provides a ink composition for digital printing, which comprises a solvent, a dye and a fountain resin, wherein the fountain resin comprises gums, cellulose and a binder resin.

The gum may be any one selected from the group consisting of guar gum, tragacanth gum, and combinations thereof.

The cellulose may be any one selected from the group consisting of methylcellulose, carboxycellulose, carboxymethylcellulose, hydroxyethylcellulose, and combinations thereof.

The filler resin may include guar gum, tragacanth gum, carboxymethyl cellulose, and polyacrylate.

The present invention also relates to a method for manufacturing a semiconductor device, Stirring the solvent, gums, cellulose, and binder resin to prepare a filler resin; Confirming the physical properties of the material after the primary filtration; Stirring the dyestuff with the above-prepared filler resin; Secondary filtration; And a third step of filtering the membrane.

The present invention also provides a digital printing method using the ink composition for digital printing.

The ink composition for digital printing according to the present invention can print clearly without limitation of fibers.

The digital printing method using the ink composition for digital printing according to the present invention can omit the preprocessing and post-processing steps, and the process is simple and eco-friendly.

1 is a diagram illustrating an example of a digital printing method according to an embodiment of the present invention.
2 is a flowchart illustrating a digital printing method and a conventional printing method according to an embodiment of the present invention.
3 is a photograph showing printouts printed using an ink composition for digital printing according to an embodiment of the present invention.
4 is a photograph showing printouts printed using the ink composition for digital printing according to Comparative Examples 1 (A) and 1 (B) of the present invention.

Hereinafter, the present invention will be described in more detail.

The present invention relates to an ink composition for digital printing, wherein the ink composition for digital printing comprises a solvent, a dye and a filler resin, wherein the filler resin comprises gums, cellulose and a binder resin .

1) Resin Resin

The gum may be any one selected from the group consisting of guar gum, tragacanth gum, and combinations thereof.

When the gum simultaneously contains guar gum and tragacanth gum, the guar gum may be contained in a ratio of 1:10 to 10: 1 by weight of tragacanth gum.

The cellulose may be any one selected from the group consisting of methylcellulose, carboxycellulose, carboxymethylcellulose, hydroxyethylcellulose, and combinations thereof, and most preferably is carboxymethylcellulose.

Most preferably, the binder resin is a polyacrylate. However, the binder resin is preferably an acrylic resin such as a polyacrylate ester, a cellulose resin such as ethyl cellulose, an aliphatic or copolymer polyester resin, a vinyl resin such as polyvinyl butyral or polyvinyl acetate An olefin resin such as a resin, a polyurethane resin, a polyether and a urea resin, an alkyd resin, a silicone resin, a fluororesin, and a polyethylene, an epoxy resin such as a petroleum and a rosin resin, an epoxy resin, an unsaturated polyester resin, Acrylic resins having various structures such as ultraviolet ray or electron beam hardening type, ethylene-propylene rubber, styrene-butadiene rubber and the like can be used together.

Most preferably, the filler resin may be one comprising guar gum, tragacanth gum, carboxymethylcellulose, and polyacrylate.

The filler resin may be prepared by adding to a solvent and then stirring.

2) Solvent

The solvent may be selected from the group consisting of water, alcohols such as methanol, ethanol, isopropanol and butanol, glycols such as ethylene glycol and glycerin, acetates such as ethyl acetate, butyl acetate and carbitol acetate, diethyl ether, tetrahydrofuran, dioxane , Ketones such as methyl ethyl ketone and acetone, hydrocarbons such as hexane and heptane, aromatics such as benzene and toluene, and halogen-substituted solvents such as chloroform, methylene chloride and carbon tetrachloride, or mixed solvents thereof, and the like. Can be used. The solvent may be used as a mixed solvent by adding other additives.

3) Dye

The dye may be composed of several auxiliary colors such as cyan, magenta, yellow, and black. The dyes according to the invention may comprise one or more of the dyes listed below for each color.

Teal

Pigment: C.I. Pigment Blue 15; C.I. Pigment Blue 15: 1; C.I. Pigment Blue 15: 2; C.I. Pigment Blue 15: 3; C.I. Pigment Blue 15: 4; C.I. Pigment Blue 60; C.I. Pigment Blue 190; C.I. Pigment Blue 192; C.I. Pigment Blue 204; C.I. Pigment Blue 288

Disperse dye: C.I. Disperse Blue 14; C.I. Disperse Blue 19; C.I. Disperse Blue 56; C.I. Disperse Blue 60; C.I. Disperse Blue 72; C.I. Disperse Blue 79; C.I. Disperse Blue 87; C.I. Disperse Blue 134; C. I. Disperse Blue 148; C.I. Disperse Blue 165; C.I. Disperse Blue 180; C.I. Disperse Blue 183; C. I. Disperse Blue 326; C.I. Disperse Blue 354; C.I. Disperse Blue 359; C.I. Disperse Blue 360

Direct dye: C.I. Direct Blue 190; C.I. Direct Blue 191; C.I. Direct Blue 192

Natural Dyes: Anthocyanin

Sunhong

Pigment: C.I. Pigment Red 13; Pigment Red 48; Pigment Red 48: 1; C.I. Pigment Red 48: 2, CI Pigment Red 122; Pigment Red 184; C.I. Pigment Red 187; C.I. Pigment Red 202; C.I. Pigment Red 228; Pigment Violet19

Disperse dye: C.I. Disperse Red 54; C.I. Disperse Red 60; Disperse Red 86; C.I. Disperse Red 91; C. I. Disperse Red 92; C. I. Disperse Red 343; C.I. Disperse Red 356

Reactive dye: C.I. Reactive Red 21; C.I. Reactive Red 22; C.I. Reactive Red 23

Natural Dyes: Carmine A; Carmine B

yellow

Pigment: C.I. Pigment Yellow 27; C.I. Pigment Yellow 54; C.I. Pigment Yellow 109; C.I. Pigment Yellow 110; C.I. Pigment Yellow 150; Pigment Yellow 151; C.I. Pigment Yellow 154; C.I. Pigment Yellow 155

Disperse dye: C.I. Disperse Yellow 5; C.I. Disperse Yellow 42; C.I. Disperse Yellow 54; C.I. Disperse Yellow 64; Disperse Yellow 79; C.I. Disperse Yellow 82; Disperse Yellow 93; C.I. Disperse Yellow 119; C.I. Disperse 160

Direct dye: C.I. Direct Yellow 130; C.I. Direct Yellow 131; C.I. Direct Yellow 132

Acid dye: C.I. Acid Yellow 20; C.I. Acid Yellow 23

Natural Dyes: Flavonoid

black

Pigment: C.I. Pigment Black 7, C.I. Pigment Black 35, C.I. Pigment Black 41

Direct dye: Poly azo; Poly Phenol

Natural Dyes: Sepia color

White

Pigment: C.I. Pigment White 6, C.I. Pigment White 7, C.I. Pigment White 23

etc

Pigment Orange 36, CI Pigment Orange 43, CI Pigment Green 7, CI Pigment Green 36, Phthalocyanine, White Carbon, Lithopone, Zinc Oxide, Aluminum Oxide, Indium Tin Oxide, Gold, Silver, Chopper, Fe2O3, Lithium, Magnesium, Barium sulfide, CI Disperse Blue 56, CI Disperse Blue 60, CI Disperse Blue 72, CI Disperse Blue 359

4) Other additives

The ink composition for digital printing may further comprise an additive such as a known reducing agent, a surfactant, a wetting agent, a thixotropic agent or a leveling agent, if necessary.

Examples of the surfactant include anionic surfactants such as sodium lauryl sulfate, nonyl phenoxy-polyethoxyethanol, and nonionic surfactants such as FSN (product of Dupont) Surfactants, and cationic surfactants such as lauryl benzyl ammonium chloride, amphoteric surfactants such as lauryl betaine and cocobetin, and the like. As wetting or wetting dispersants there may be used compounds such as polyethylene glycols, the Surfinol series of Air Products, and the Tego wet series of Deguessa.

Examples of the padding or leveling agent include BYK series manufactured by BYK, Glide series manufactured by Degussa, EFKA 3000 series manufactured by EFKA, DS of Cognis, X (DSX) series can be used.

In addition, the ink composition for digital printing can be used by adding a reducing agent to facilitate firing, for example, hydrazine, acetic hydrazide, sodium or potassium borohydride, triosodium citrate, and methyl diethanolamine , Amine compounds such as dimethylamineborane, metal salts such as ferric chloride and ferrous lactate, hydrogen, hydrogen iodide, carbon monoxide, formaldehyde, aldehyde compounds such as acetaldehyde, glucose, ascorbic acid, salicylic acid, tannic acid tannic acid, pyrogallol, and organic compounds such as hydroquinone.

The above additives are added and stirred to prepare an ink composition for digital printing.

5) Properties

The ink composition for digital printing has a low viscosity.

The viscosity of the ink composition for digital printing is not particularly limited, but may be varied depending on the method and kind of the digital printing method. However, the viscosity is preferably about 0.1 to 1,000 cps, more preferably 1 to 100 cps Do. If it is lower than this range, a problem of bleeding of the ink may occur, and if it is higher than the range, ink is hardly discharged smoothly.

6) Manufacturing method

The present invention relates to a method for manufacturing a semiconductor device, A solvent, gums, cellulose, and a binder resin to prepare a porous resin; Confirming the physical properties of the material after the primary filtration; Stirring the dyestuff with the above-prepared filler resin; Secondary filtration; And a third step of filtering the membrane.

The step of confirming the physical properties of the material is carried out three times before starting the ink composition production, in the middle of the production, and after the completion of the production.

The types of the gums, cellulose, and binder resin are the same as those described in 1) above.

The method for producing the ink composition for digital printing includes a microfiltration process to remove impurities generated during the manufacturing process or to remove mixed impurities and to filter out particles having a predetermined size or more. In the primary and secondary filtration steps, a housing filter (0.45um), a paper filter (1.2um), a millipore filter (0.8um), etc. may be used as the filter. The tertiary membrane filtration step is performed by an ultra-precise membrane filter paper. The microfiltration process removes by-products and harmful substances from the ink.

The filtration can be further tested by the final plotter after confirming the property values after the first filtration, the second filtration and the third filtration. The plotter test is to output 2 ~ 18m per hour.

7) Digital printing method

The present invention also provides a digital printing method using the ink composition for digital printing according to the present invention.

Since the ink composition for digital printing has a drop on demand system in which ink is sprayed only on a necessary portion through nozzles, the system, plate making and coloring process are omitted, thereby reducing the amount of wastewater and waste water It is possible. Therefore, it is eco-friendly compared to digital printing process using existing ink. Specifically, the ink composition for digital printing can be applied regardless of kinds of natural fibers and synthetic fibers, and can be directly printed. Such fibers are characterized in that pretreatment such as washing with water, degreasing, primer treatment, heat treatment, oxidation or reduction treatment, and post treatment such as washing and drying are omitted.

An example of the discontinuous injection system is shown in Fig. In Fig. 1, reference numeral 10 denotes ink, reference numeral 11 denotes an ink drop, reference numeral 20 denotes a nozzle, reference numeral 30 denotes a heat or piezo element, reference numeral 40 denotes image data transmission, and reference numeral 50 denotes a fiber material.

The digital printing method using the ink composition for digital printing according to the present invention is shown in Fig. 2 in comparison with the conventional printing method and the conventional digital printing method.

According to FIG. 2, the conventional printing method requires a stage in which a film is printed after fabricating a textile, a plate and a plate are manufactured, a copper plate is printed, a dye is applied, and a drying step is required. In the conventional digital printing method, However, the digital printing method according to the present invention does not have a textile design plate or a copper plate manufacturing step, and the preprocessing and post-processing steps are omitted, so that a very simple process can be carried out.

As the process is simplified, it is possible to cope with short-term delivery, and there is no burden even if a small amount of product is produced after receiving an order, and there is an economical advantage that the fixed cost can be reduced. As the process is simplified, The amount of wastewater and waste water discharged from the wastewater is reduced.

Further, the digital printing method according to the present invention can perform direct printing without discriminating the material of the fiber, which is an object to be printed.

Even when direct printing is performed, there is no ink bleeding phenomenon, sharpness is improved, sharp prints can be printed, and various colors and patterns can be expressed.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

[Preparation Example 1: Preparation and printing of ink compositions for digital printing]

≪ Example 1 >

Wearing the raw materials and checking the physical properties. The certified raw materials were prepared by the necessary input units.

100 g of glycerin and 100 g of 1,4-butanediol were mixed with 400 g of distilled water to prepare a solvent. 100 g of guar gum (purchased from Sigam), tragacanth gum (purchased from Sigam), 100 g of polyacrylate (purchased from Sigam) and 100 g of carboxymethyl cellulose (purchased from Sigam) were added to the solvent, After stirring for 5 times, filtration was carried out. After filtration, the properties of the material were examined.

The milling dye (Milling Dye) was added to the filtered mixture, followed by secondary filtration and tertiary membrane filtration. The physical properties of the ink composition thus prepared were examined.

Without pretreatment and aftertreatment, into a digital dye base and printed on the fibers.

≪ Comparative Example 1 &

Reactive ink of InkTech was purchased and used.

Without preprocessing and aftertreatment, they were placed in a digital dye base and printed on polyester fibers.

≪ Comparative Example 2 &

The polyester fibers were prepared by pretreatment with a full treatment method.

Reactive Ink from InkTech was purchased, put into a digital printer, and printed on pretreated polyester fibers.

The post-treatment of removing the fiber of the output fiber and drying was performed.

[Experimental Example 1: Plotter Test]

After the ink was put in the plotter, 2m, 4m, 6m, 8m, 10m, 12m, 14m, 16m and 18m were outputted for 1 hour. The plotter test was performed in two passes.

There was no abnormality in the plotter test result.

[Experimental Example 2: Measurement of physical properties of ink composition for digital printing]

The physical properties of the raw materials, the intermediate properties, and the final properties of the raw materials in Example 1 were determined by measuring the Ph, Mv, S / T and Vis of the materials using a UV spectrometer.

As a result of measurement, the physical properties of the ink composition were Ph 8 to 9, Mv 50, S / T 2 to 3 and Vis 3 to 5, respectively.

[Experimental Example 3: Washing fastness]

The digital printing ink prepared in Example 1 was put into a digital textile printing machine and printed on a textile to test the washing fastness (KS K ISO 105-C06, A1S: 2014). The dyes showing blue, sunflower, yellow, and blue-green were used as the milling dyes of Preparation Example 1 and tested for color.

The test results are shown in Table 1 below.

Textiles / Dyestuffs blue Red yellow green acetate 4 4-5 4-5 3-4 if 3 3 4 3-4 nylon 3-4 4 4-5 4 polyester 4 4 4-5 4-5 acryl 4-5 4-5 4-5 4-5 fence 4-5 4 4-5 4-5 Wash fastness KS K ISO 105-C06, A1S: 2014
Test environment: temperature 20 ± 2 ℃, humidity 65 ± 4% RH
Detergent amount: 4 g / L (ECE standard detergent)
Time: 30 minutes
Temperature: 40 ° C
Liquid amount: 150 mL
Number of beads: 10
Acid treatment: Do not
Attached white cloth

Referring to Table 1, it was confirmed that when the ink composition prepared according to the present invention is used, it can be applied to various kinds of fibers and that the fastness of washing of each of the fibers is excellent.

[Experimental Example 4: Dyeability]

The dyestuffs of Preparation Example 1 were dyed with dyes representing blue, sunflower, yellow and cyan, and the results are shown in FIG.

In order to test the sharpness of the printing, the digital printing ink prepared in Example 1 and the ink of Comparative Example 1 were respectively put into a digital textile printing machine, and then a picture was printed on polyester fibers. This comparison is shown in FIG. Fig. 4 (A) shows the use of commercially available ink, and Fig. 4 (B) shows the use of the ink according to the present invention.

It was confirmed that the sharpness of Fig. 4 (B) using the ink according to the present invention is better.

[ Experimental Example  5: Evaluation of process efficiency]

The processing time of the digital printing process according to the present invention and the digital printing process according to the present invention are shown in Tables 2 and 3 below.

fair Comparative Example 2 Example 1 Benefit Pretreatment 500yd 2 hours 30 minutes none 2 hours and 30 minutes savings After treatment 500yd 2 hours 30 minutes none 2 hours and 30 minutes savings Post-processing 5 hours none Save 5 hours

fair Comparative Example 2 Example 1 Benefit 500yd average per day
SuSE City Use 1.5t of process none Reduction of 1.5 tons of processing After treatment Water used in the dyeing process releases into the waste water. 1.5t none Waste water savings

As shown in Tables 2 and 3, it was confirmed that the average 500 day processing time can be saved for 5 hours and the 1.5 t waste water can be saved when 500yd processing is performed on average per day.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

10: Ink
11: ink drop
20: Nozzle
30: Heat or piezo element
40: Transferring image data
50: Textile material

Claims (6)

Solvents, dyes and colourant resins,
Wherein the free-flowing resin comprises gums, cellulose, and a binder resin. The method according to claim 1,
Wherein the gum is any one selected from the group consisting of guar gum, tragacanth gum, and combinations thereof. The method according to claim 1,
Wherein the cellulose is any one selected from the group consisting of methylcellulose, carboxycellulose, carboxymethylcellulose, hydroxyethylcellulose, and combinations thereof. The method according to claim 1,
Wherein said refractory resin comprises guar gum, tragacanth gum, carboxymethylcellulose and polyacrylate. Confirming the physical properties of the material;
Stirring the solvent, gums, cellulose, and binder resin to prepare a filler resin;
Confirming the physical properties of the material after the primary filtration;
Stirring the dyestuff with the above-prepared filler resin;
Secondary filtration; And
Step for filtering the tertiary membrane
By weight based on the total weight of the ink composition. A digital printing method using the ink composition for digital printing according to any one of claims 1 to 4.

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