KR101694726B1 - Pretreatment composition for digital textile printing - Google Patents

Abstract

The present invention relates to a composition for pretreating digital printing. In one embodiment, the composition for pretreatment for digital printing comprises 2 to 5% by weight of a glue, 6 to 12% by weight of a urea compound, 0.1 to 3% by weight of m-nitrobenzene sodium sulfate (MNBS) 0.5 to 3% by weight of ammonium sulfate and 80 to 91% by weight of water, wherein the adhesive agent is selected from the group consisting of carboxymethyl cellulose, carboxymethyl starch, guar gum and alginate, Based compound, and the urea-based compound includes at least one of urea and thiourea.

Description

Technical Field [0001] The present invention relates to a composition for pre-

The present invention relates to a composition for pretreating digital printing.

DTP (Digital Textile Printing) is a method of digitizing the entire process from design to printing, and printing using an inkjet printer with no printing. Generally, such a DTP system can be divided into designing, pre-processing, printing, and post-processing. The design is made through computer image processing. The sharpness and the quality of the image are controlled through pre- and post-processing to prevent bleeding of the ink and enhance color.

Such a digital printing technology has been attracting attention because, if the design is prepared, the product can be manufactured in only one to two hours by using inkjet printing technology. In addition, due to the rapidity of the technology, the width of the material has been diversified due to recent technological developments, and the ink and dye can be used almost unlimitedly. Also, the fiber material can be processed with all kinds of materials such as natural fiber and chemical fiber , Is currently attracting attention.

On the other hand, when a digital printing operation is performed on a fabric, ink is blurred due to the low viscosity of the ink jetted from the nozzles and the three-dimensional surface structure of the fabric, so that bright colors and patterns can not be developed. In the case of ordinary screen printing or roller printing, it is possible to prevent the bleeding phenomenon because the viscosity of the ink is increased by adding a thickener to the ink. In the case of digital printing, however, The method can not be applied.

Accordingly, when digital printing is performed, a method of preventing ink bleeding by pretreating the fabric to be printed as described above has been developed. That is, a pretreatment agent is used for the purpose of forming a clear pattern without ink spreading on the fabric before printing the fiber with a digital printer. However, in such a pretreatment process, a pretreatment agent for various fiber materials is required because of the characteristics that depend on the type of fiber and the ink used.

In connection with the pretreatment process, Korean Patent Laid-Open Publication No. 2006-0040928 (published on May 11, 2006) discloses a pretreatment composition for ink jet printing comprising an ultraviolet screening agent, an acrylic resin and a porous surface modifying silica containing a benzophenone- .

An object of the present invention is to provide a composition for pre-processing digital printing capable of digital printing having excellent color density.

Another object of the present invention is to provide a composition for pre-processing digital printing capable of digital printing having excellent color development and sharpness.

Another object of the present invention is to provide a composition for pretreating digital printing having excellent productivity and economy.

One aspect of the present invention relates to a composition for pretreating digital printing. In one embodiment, the composition for pretreatment for digital printing comprises 2 to 5% by weight of a glue, 6 to 12% by weight of a urea compound, 0.1 to 3% by weight of m-nitrobenzene sodium sulfate (MNBS) 0.5 to 3% by weight of ammonium sulfate and 80 to 91% by weight of water, wherein the adhesive agent is selected from the group consisting of carboxymethyl cellulose, carboxymethyl starch, guar gum and alginate, Based compound, and the urea-based compound includes at least one of urea and thiourea.

In another embodiment, the composition for pretreating digital print printing comprises 10 to 15% by weight of a synthetic resin, 8 to 13% by weight of a urea compound, 0.05 to 3% by weight of metanitrobenzene sodium sulfate, 0.1 to 7% by weight of sodium bicarbonate, 0.5 to 3% by weight of a penetration enhancer, and 68 to 77% by weight of water, wherein the penetration enhancer comprises at least one of polyethylene, polypropylene and polybutylene, the carboxymethyl cellulose, carboxymethyl cellulose, Wherein the urea-based compound comprises at least one of carboxymethyl starch, guar gum and alginate-based compounds, and the urea-based compound includes at least one of urea and thio urea.

In one embodiment, the composition for pretreating digital prints may have a viscosity of less than 180 cPs measured at 25 ° C.

In one embodiment, the pick-up rate of the composition for pretreating digital prints may be 70% or more.

In one embodiment, the composition for pretreating digital prints may further comprise at least one of an antibacterial agent, a glycol-based compound and an anti-bleeding agent.

In one embodiment, the urea and thiourea may be included in a weight ratio of 1: 0.5 to 1: 2.5.

By applying the composition for pretreatment of digital printing according to the present invention, it is possible to provide excellent color density, excellent coloring and sharpness, and excellent productivity and economy in digital printing.

FIG. 1 is a photograph showing silk fabrics printed by color after pretreatment by applying the pretreatment composition of the present invention and the comparative example of the present invention.
FIG. 2 is a photograph showing silk fabrics printed by color after pretreatment by applying the pretreatment composition of the present invention and the comparative example of the present invention.
FIG. 3 is a photograph showing a cotton fabric printed by color after pretreatment by applying the pretreatment composition of the present invention and the comparative example of the present invention.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

Composition for pretreatment of digital printing

One aspect of the present invention relates to a composition for pretreating digital printing.

In one embodiment of the present invention, the composition for pretreatment for digital printing comprises 2 to 5% by weight of a glue, 6 to 12% by weight of a urea compound, 0.1 to 3% by weight of m-nitrobenzene sodium sulfate (MNBS) 0.5 to 3% by weight of ammonium sulfate, and 80 to 91% by weight of water. The composition for pre-processing digital printing can be applied as a pretreatment agent for silk fabric digital printing.

Below. The components constituting the composition for pretreating digital prints will be described in detail.

Hoje

In the present invention, the rosin is used for dyeing a dye on a fiber, and is included to obtain a dye having high color and sharpness. In one embodiment, the adhesive agent comprises at least one of carboxymethyl cellulose, carboxymethyl starch, guar gum, and alginate compounds.

The carboxymethyl cellulose can be applied as a dye for reactive dyes and is excellent in hygroscopicity and is excellent in resistance to decomposition due to microorganisms and chemical factors while preventing moisture evaporation of the composition of the present invention.

The carboxymethyl starch is excellent in the color development and sharpness improvement of the printed fabric and the effect of improving the feel.

And can be applied as a foaming agent for guacanosilicic dyes, and is excellent in the color development and sharpness improvement of printed fabrics and the effect of improving touch feeling.

The alginate-based compound can be applied as a dye for reactive dyes, has excellent hygroscopicity, is easy to dry, and has excellent color development and sharpness at the time of digital printing. In one embodiment, the alginate compound may be sodium alginate.

The glue is contained in an amount of 2 to 5% by weight based on the total weight of the composition for pretreating the digital print. When the ratio is within the above range, it is possible to obtain a dyeing material excellent in color development and sharpness at the time of digital printing of a polyamide-based fabric or a silk fabric. If the content of the chelating agent is less than 2% by weight, desired color development and sharpness can not be obtained. If the content of the chelating agent is more than 5% by weight, the texture of the fabric after digital printing can be impaired. For example, 2 to 4% by weight. For example, 2 to 3% by weight. In a specific example, the rosin may be guar gum.

Urea system  compound

The urea compound enables the dye and the cosmetic component to dissolve in the digital print, and absorbs the condensed vapor during the heat to heat the dye on the textile during digital printing. By the addition of the urea-based compound, penetration of the acidic ink into the fabric during digital printing can be improved, and the effect of improving the color development and the sharpness can be obtained.

The urea-based compound includes at least one of urea and thio urea.

The urea compound is contained in an amount of 5 to 12% by weight based on the total weight of the composition for pretreating the digital print. When the silk fabric is in the above range, it is possible to obtain a dyeing material excellent in color development and sharpness upon digital printing of the silk fabric. If the urea compound is contained in an amount of less than 6% by weight, desired color development and sharpness can not be obtained. If the urea compound is contained in an amount exceeding 12% by weight, the touch feeling of the fabric after digital printing can be impaired. For example, 6 to 11% by weight. For example, 7 to 9% by weight.

In one embodiment, the urea compound may include urea and thiourea in a weight ratio of 1: 0.5-3. When the content is in the above range, the color fastness and sharpness are excellent, and washing fastness, light fastness and friction fastness can be excellent. For example, in a weight ratio of 1: 1.5 to 2.5.

Meta  Nitrobenzene sodium Sulfate

The m-nitrobenzene sodium sulfate (MNBS) decomposes in the process of dissolving the mother liquor component to form a reducing group, thereby preventing the dye from being reduced by the reducing power according to the pH in the mother liquor have.

In one embodiment, the metanitrobenzene sodium sulfate is included in an amount of 0.1 to 3% by weight based on the total weight of the composition for pretreating the digital print. When the content is in the above range, the reduction of the dye can be prevented, and the long-term storage property of the composition of the present invention can be excellent. When the content of metanitrobenzene sodium sulfate is less than 0.1% by weight, it is difficult to prevent reduction of the dye by the adhesive agent. When the content exceeds 3% by weight, the feeling of touch and fastness of the printed fabric may be lowered. For example, 0.1 to 2% by weight. For example, 0.3 to 2% by weight.

ammonium Sulfate

The ammonium sulfate is included for the purpose of adjusting the pH of the composition of the present invention and improving the fixability and coloring property of the dye upon digital printing.

The ammonium sulfate is contained in an amount of 0.5 to 3% by weight based on the total weight of the composition for pretreating the digital print. When included in the above range, the fixing property and coloring property of the dye can be excellent when digital printing is performed. When the ammonium sulfate is contained in an amount of less than 0.5% by weight, the fixability and the color developability of the sample deteriorate. When the ammonium sulfate is contained in an amount exceeding 3% by weight, fixability and coloring property of the dye may be deteriorated. For example, 0.5 to 2% by weight. For example, 0.5 to 1.5% by weight.

water

The water is included for uniform mixing and viscosity control of the components for the digital print pre-treatment. The water is contained in an amount of 80 to 91% by weight based on the total weight of the composition for pretreating the digital print. In the above range, the viscosity and the mixing property of the composition may be excellent. When the amount of water is less than 80% by weight, the viscosity of the composition for preprinting digital printing is excessively increased to deteriorate the color development of the dye. When the water content is more than 91% by weight, the fixability and coloring property of the dye may deteriorate during digital printing . For example, 82 to 89% by weight. For example from 84 to 88% by weight.

In one embodiment, the composition for pretreating digital prints may have a viscosity of less than 180 cPs measured at 20 ° C. In the above range, workability, fixability of dye and coloring property can be excellent. For example from 70 cPs to 180 cPs.

In one embodiment, the pick-up (or injection amount) of the composition for pretreating digital prints may be 70% or more. In a specific example, the digital print printing composition may be applied to a silk fabric at a picking rate of 70% or higher by a padding method, followed by drying to perform digital printing. In the above range, the color developability of the dye upon digital printing is excellent and the washing fastness, light fastness and friction fastness of the dye can be excellent. For example, the pick-up rate of the composition may be from 70% to 85%. Another example could be 80-85%.

In another embodiment of the present invention, the composition for pretreatment for digital print printing comprises a homogenate, a urea compound, metanitrobenzene sodium sulfate (MNBS), sodium bicarbonate, a penetration enhancer and water. More specifically, 10 to 15% by weight of a glue, 8 to 13% by weight of a urea compound, 0.05 to 3% by weight of metanitrobenzene sodium sulfate, 0.1 to 7% by weight of sodium bicarbonate, 0.5 to 3% by weight of a penetration enhancer And 68 to 77% by weight of water, wherein the penetration enhancer comprises at least one of polyethylene, polypropylene and polybutylene, and the adhesive agent is selected from the group consisting of carboxymethyl cellulose, carboxymethyl starch, Guar gum and alginate based compounds, and the urea based compound includes at least one of urea and thio urea.

The above-mentioned pastes may be the same as those described above. The adhesive agent may include at least one selected from the group consisting of carboxymethyl cellulose, carboxymethyl starch, guar gum and alginate.

The glue is contained in an amount of 10 to 15% by weight based on the total weight of the composition for pretreating the digital print. When included in the above range, a dyeing material excellent in color development and sharpness upon digital printing of cotton fabrics can be obtained. If it is contained in an amount of less than 10% by weight, the desired color developability and sharpness can not be obtained. If it exceeds 15% by weight, the feel of the fabric after digital printing can be impaired. For example, 11 to 14% by weight. For example 12 to 13% by weight. In the specific examples, carboxymethylcellulose may be used as the cosmetics.

As the urea compound, the same compounds as those described above can be used. The urea-based compound includes at least one of urea and thio urea.

The urea compound is contained in an amount of 8 to 13% by weight based on the total weight of the composition for pretreating digital prints. When included in the above range, a dyeing material excellent in color development and sharpness upon digital printing of cotton fabrics can be obtained. If the urea compound is contained in an amount of less than 8% by weight, desired color development and sharpness can not be obtained. If the urea compound is contained in an amount exceeding 13% by weight, the feel of the fabric after digital printing can be impaired. For example, 5 to 11% by weight. For example, 7 to 11% by weight.

In one embodiment, the urea compound may include urea and thiourea at a weight ratio of 1: 0.5 to 2.5. When the content is in the above range, the color fastness and sharpness are excellent, and washing fastness, light fastness and friction fastness can be excellent.

In one embodiment, the same metanilobenzene sodium sulfate as described above may be used. The methanitrobenzene sodium sulfate is contained in an amount of 0.05 to 3% by weight based on the total weight of the composition for pretreating the digital print. When the content is in the above range, the reduction of the dye can be prevented, and the long-term storage property of the composition of the present invention can be excellent. When the content of metanitrobenzene sodium sulfate is less than 0.05% by weight, it is difficult to prevent the reduction of the dye by the adhesive agent, and when it exceeds 3% by weight, the feeling of touch and fastness of the printed fabric may be lowered. For example, 0.1 to 2% by weight. For example, 0.3 to 2% by weight.

The sodium bicarbonate is included as a weak alkaline agent to adjust the pH of the present invention to improve the fixation of the dye upon printing printing of cotton fabrics.

The sodium bicarbonate is contained in an amount of 0.1 to 7% by weight based on the total weight of the composition for pretreating the digital print. When included in the above range, a dyeing material excellent in color development and sharpness upon digital printing of cotton fabrics can be obtained. If the sodium bicarbonate is contained in an amount of less than 0.1% by weight, desired color development and sharpness can not be obtained. If the sodium bicarbonate is contained in an amount exceeding 7% by weight, the feel of the fabric after digital printing can be impaired. For example, 1 to 6% by weight. For example, 3 to 5% by weight.

The penetration enhancer is included for the purpose of enhancing the permeability of the dye upon digital printing of cotton fabrics. In one embodiment, the penetration enhancer comprises at least one of polyethylene, polypropylene, and polybutylene. When the above-mentioned components are used, permeability of the dye can be improved upon digital printing of cotton fabrics.

The permeation enhancer is contained in an amount of 0.5 to 3% by weight based on the total weight of the composition for pretreating the digital print. When included in the above range, a dyeing material excellent in color development and sharpness upon digital printing of cotton fabrics can be obtained. If the urea compound is contained in an amount of less than 8% by weight, desired color development and sharpness can not be obtained. If the urea compound is contained in an amount exceeding 13% by weight, the feel of the fabric after digital printing can be impaired. For example, 5 to 11% by weight. For example, 5 to 9% by weight.

The water is contained in an amount of 68 to 77% by weight based on the total weight of the composition for pretreating digital print. In the above range, the viscosity and the mixing property of the composition may be excellent. When the water content is less than 68% by weight, the viscosity of the composition for pretreating digital prints is excessively increased to deteriorate the color developability of the dye. When the water content exceeds 77% by weight, the fixability and coloring property of the dye have. For example, from 69 to 76% by weight. For example, 70 to 75% by weight.

In one embodiment, the composition for pretreating digital prints may further comprise at least one of an antibacterial agent, a glycol-based compound and an anti-bleeding agent.

The antimicrobial agent is included for the purpose of antibacterial effect. The antimicrobial agent may include one or more of isopropyl alcohol, isopropyl myristate, and salicylic acid. The antimicrobial agent is contained in an amount of 0.1 to 5% by weight based on the total weight of the composition for pretreating the digital print. When included in the above range, antimicrobial activity of cotton fabrics upon digital printing is excellent, and deterioration of coloring property can be prevented. If the antimicrobial agent is contained in an amount of less than 0.1% by weight, desired antimicrobial activity can not be ensured. If the antimicrobial agent is contained in an amount exceeding 5% by weight, color development and texture of the fabric may be impaired after digital printing. For example, 0.1 to 3% by weight. For example, 0.1 to 2% by weight.

The glycol compound is included as a fixing agent for the purpose of improving the fixation and fastness of the dye upon digital printing. The glycol-based compound may include at least one of ethylene glycol, diethylene glycol, triethylene glycol, and tetraethylene glycol. In one embodiment, the glycol compound may be included in an amount of 0.1 to 5% by weight based on the total weight of the composition for pretreating the digital print. When the content is in the above range, the reduction of the dye can be prevented, and the long-term storage property of the composition of the present invention can be excellent. For example, 0.1 to 4% by weight. For example, 0.5 to 3% by weight.

The anti-bleeding agent is included for the purpose of preventing bleeding and ensuring image sharpness. The anti-bleeding agent may include at least one of didecyl ether, tridecyl ether, and tetradecyl ether. The anti-bleeding agent is contained in an amount of 0.1 to 5% by weight based on the total weight of the composition for pretreating the digital print. When included in the above range, bleaching at the time of digital printing of the cotton fabric can be prevented, and a dyeing product excellent in sharpness, color development and sharpness can be obtained. When the anti-bleeding agent is contained in an amount of less than 0.1% by weight, image clarity is deteriorated, bleeding phenomenon is difficult to prevent, and when the anti-bleeding agent is contained in an amount exceeding 5% by weight, the feel of the fabric after digital printing can be impaired. For example, 1 to 4% by weight. For example, 1 to 3% by weight.

In one embodiment, the glycol compound and the anti-bleeding agent may be contained in a weight ratio of 1: 0.1 to 5. When the content is in the above range, it is possible to obtain a dyeing material having excellent anti-bleeding effect, excellent antimicrobial effect, and excellent in sharpness, coloring property and sharpness. For example, in a weight ratio of 1: 0.5 to 2.5.

In one embodiment, the composition for pretreating digital prints may have a viscosity of less than 180 cPs measured at 20 ° C. In the above range, workability, fixability of dye and coloring property can be excellent. For example from 50 cPs to 130 cPs.

In one embodiment, the pick-up rate of the composition for pretreating digital prints may be at least 70%. In a specific example, the digital print printing composition may be applied to a cotton fabric by a padding method at a pick-up rate of 70% or more, followed by drying to perform digital printing. In the above range, the color developability of the dye upon digital printing is excellent and the washing fastness, light fastness and friction fastness of the dye can be excellent. For example, the pick-up rate of the composition may be from 70% to 85%. Another example could be 80-85%.

By applying the composition for pre-processing for digital printing according to the present invention, excellent color density, excellent color development and sharpness can be obtained in digital printing, excellent wash fastness, light fastness and friction fastness, and excellent productivity and economy.

Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. However, the following examples are provided to aid understanding of the present invention, and the scope of the present invention is not limited to the following examples. The contents not described here are sufficiently technically inferior to those skilled in the art, and a description thereof will be omitted.

Example  And Comparative Example

The components of the composition for pretreating digital printing used in Examples and Comparative Examples are as follows.

(1) Base (a): Guar gum was used. (B) Carboxymethylcellulose was used. Homopolymer (c): Carboxymethyl starch was used. (D): MP (manufactured by Huntsman) was used.

(2) Urea compound (a): Urea was used. Urea compound (b): thio urea was used.

(3) Penetration enhancer (a): Polyethylene was used. Penetration enhancer (b): Polypropylene was used.

(4) glycol compound: 4H, manufactured by SM Corporation.

(5) Tridecyl glycol was used as an anti-bleeding agent.

(One) For silk  Fabric digital printing

Pretreatment process: The silk fabric was subjected to padding treatment by applying the pretreatment compositions of Example 1 and Comparative Examples 1 to 7 prepared in the composition and viscosity according to the following Table 1, applying the pick-up rate shown in Table 1 below, And dried at 100 DEG C for 15 minutes.

Digital printing process: The silk fabrics to which the pretreatment compositions of Example 1 and Comparative Examples 1 to 7 were respectively applied were classified into black, yellow, red, sky, blue, (Konica Minolta Co., Ltd.) was used to print an image at 540 x 720 dpi resolution, using photoPRINT 4.0 as the software, and a digital inkjet printer , And images of the black, yellow, red, sky, blue, and orange at 100% concentration in the software, respectively.

The digital printed fabric was pre-dried for 10 minutes at a temperature of 85 DEG C and then steaming in a saturated steam at a temperature of 103 DEG C for 20 minutes using a steamer. The steamed fabric was washed, soaped and dried.

After pretreatment using the pretreatment compositions of Example 1 and Comparative Examples 1 to 7, printed silk fabrics are shown in FIGS. 1 and 2, respectively. Further, Example 1 and Comparative Examples 1 to 7 were irradiated with a light source D65 using a CCM (Computer Color Matching System, COLOR EYE (R) 100, Guetag Macbeth (TM) Color values and L (lightness) values were measured on the basis of printed silk fabrics and are shown in Tables 2 and 3 below. The color strength (swl) was calculated by measuring a similar chromaticity on the basis of Comparative Example 1, and the results are shown in Tables 2 and 3 below.

From the measured surface reflectance, the total K / S value (salt index) as the apparent color density was derived based on the Kubelka-Munk equation, and the results are shown in Table 4 below.

The dry and wet friction fastness tests were performed on the examples and comparative examples 1 to 7 by the CROCKMETER method using a friction rub tester (CM-5, Atlas Co., USA) according to ISO 105-X12. The rubbing fastness was evaluated by the contamination degree of the cotton used in the rubbing, and the results are shown in Tables 2 and 3 below.

Referring to the results of FIGS. 1 and 2 and Tables 2 to 4, the digital printed silk fabrics after application of the pretreatment composition according to Example 1 of the present invention exhibited the same results as those of Comparative Example 1 strength and K / S value were excellent. In Comparative Example 7, the color and build-up characteristics were good, but the touch feeling of the fabric was stiff compared to Example 1, and the touch feeling was lowered.

(2) digital prints for cotton fabrics

Pretreatment process: cotton fabric (raw paper) was scoured and sandblasted three times. The bleached cotton fabrics were each subjected to the padding treatment according to the following Table 5 and applied with the composition for the pretreatment of Example 2 and Comparative Examples 8 to 10 prepared under the composition and viscosity conditions shown in Table 5, Lt; 0 > C for 15 minutes.

Digital printing process: For the Example 2 and the Comparative Examples 8 to 10 in which the composition for the pretreatment was applied, black, yellow, red, sky, blue, and orange (DGI-F 200 reactive dye) with a 6-color digital printing dye (DGI-orange 20000, DGI-F 200 reactive dye) was used to print an image of 540 x 720 dpi. Using photoPRINT 4.0 as software, images of the black, yellow, red, sky, blue, and orange at the 100% Respectively.

The digital printed fabric was pre-dried for 10 minutes at a temperature of 85 DEG C and then steaming in a saturated steam at a temperature of 103 DEG C for 20 minutes using a steamer. The steamed fabric was washed, soaped and dried.

After pretreatment using the composition for pretreatment of Example 2 and Comparative Examples 8 to 10, printed cotton fabrics are shown in FIG. 1 and FIG. 2, respectively. In Example 2 and Comparative Examples 8 to 10, the color value and the L (brightness) value, and the wavelength of each wavelength band were measured in the same manner as in Example 1 on the basis of the printed cotton fabric to which the pretreatment agent of Comparative Example 8 was applied Were measured and are shown in Table 6 below. The K / S value as the apparent color density was derived from the measured surface reflectance in the same manner as in Example 1, and the results are shown in Table 7 below.

Further, the wet fastness to rubbing fastness test was carried out in the same manner as in Example 1 for Example 2 and Comparative Examples 8 to 10. The rubbing fastness was evaluated by the contamination degree of the cotton used in the rubbing, and the results are shown in Table 6 below.

Referring to the results of FIGS. 3, 6, and 7, the digital printed cotton fabric after applying the pretreatment composition according to Example 2 of the present invention was superior to Comparative Example 8 and Comparative Examples 9 to 10 And 90 ~ 100% of strength in most colors. The cotton fabric to which the pretreatment composition of Example 2 was applied had lightness and rubbing fastness characteristics superior to those of Comparative Examples 8 ~ 10.

Claims (6)

delete Wherein the composition comprises 10 to 15% by weight of a urethane resin, 8 to 13% by weight of a urea compound, 0.05 to 3% by weight of metanitrobenzene sodium sulfate, 0.1 to 7% by weight of sodium bicarbonate, 0.5 to 3% 68 to 77% by weight,
Wherein the permeation enhancer comprises at least one of polyethylene, polypropylene and polybutylene,
The adhesive agent may include at least one selected from the group consisting of carboxymethyl cellulose, carboxymethyl starch, guar gum and alginate compounds,
Wherein the urea-based compound comprises at least one of urea and thio urea.
The composition for pretreating digital printing according to claim 2, wherein the composition for pretreating digital printing has a viscosity measured at 25 캜 of 180 cPs or less.
The composition for pretreating digital print according to claim 2, wherein the pick-up ratio of the composition for pretreating digital print is 70% or more.
[3] The composition according to claim 2, wherein the composition for pretreatment for digital printing further comprises at least one of a glycol compound, an antibacterial agent and an anti-
Wherein the glycol-based compound contains at least one of ethylene glycol, diethylene glycol, triethylene glycol, and tetraethylene glycol,
Wherein the antimicrobial agent comprises at least one of isopropyl alcohol, isopropyl myristate, and salicylic acid,
Wherein the bleeding inhibitor comprises at least one of diglycyl ether, tridecyl ether and tetradecyl ether.
The composition for pretreating digital print according to claim 2, wherein the urea and thiourea are contained in a weight ratio of 1: 0.5 to 1: 2.5.

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