JP2010150453A - Ink set for inkjet printing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ink set for inkjet printing that can provide a printed textile excellent not only in washing fastness but also in rubbing fastness in printing of substrates comprised of various fibers. <P>SOLUTION: The ink set for inkjet printing is a combination of a pigment, a water-dispersible resin whose coating elongation is 400-1,000% and coating strength is 20-50 N/mm<SP>2</SP>, a water-containing ink for inkjet, and an over coating agent whose coating elongation is 100-400%. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an ink set for textile printing ink jet and a method for producing a textile print.

  As a method for printing images such as letters, pictures, designs, etc. on fabrics such as textiles and non-woven fabrics, in addition to the screen printing method and roller printing method, in recent years, printing that can be processed substantially non-plate by image processing with a computer. Inkjet methods are attracting attention.

  As coloring materials for textile printing inks, there are dyes and pigments. In the case of using a dye, in addition to good color development, there is an advantage that the dyeing fastness is high because the dye is dyed by utilizing the reaction with the functional group of the fiber. However, there is a problem that it is necessary to select a dye according to the type of fiber because the light resistance of the dye itself is low. Furthermore, pre-treatment for suppressing bleeding, and post-treatment such as a steaming process for fixing the dye and a washing process for washing the unfixed dye are necessary, and these work burdens are generated and water pollution occurs. And the problem of causing high costs remains.

  On the other hand, when a pigment is used, there are advantages such as high light resistance, compatibility with a plurality of fiber types, and elimination of a color material removal step, and the simplicity is preferred over dyes.

  In the pigment ink, a binder component for fixing the pigment is required. In the case of the screen method, the fastness can be ensured by increasing the amount of the resin used as the binder, but in the case of the ink jet method, the amount of the resin added is limited from the viewpoint of ink viscosity and dischargeability. There remains a problem with robustness.

Patent Document 1 discloses a method in which printing on a fabric is repeated a plurality of times, and temporary heating and fixing are performed at least once while the printing is repeated a plurality of times, and then the main heating and fixing are performed after the final printing. The purpose of this method is to obtain a white inkjet image that gives strong washing fastness and is excellent in visibility to a dark fabric. However, due to an increase in processes such as multiple printing and heat fixing in the middle, problems remain in terms of productivity. Improvements are also needed in the fastness to friction, especially wet fastness.
JP 2005-161583 A

  The present invention provides a printing ink-jet ink set and a method for producing a printed material, which can provide a printed material that is excellent not only in washing fastness but also in friction fastness in a printed material composed of various fibers. This is the issue.

One aspect of the present invention, the pigment is a film elongation of 400% to 1000%, and the ink-jet ink comprising water-dispersible resin film strength is ^{20N / mm 2 ~50N / mm 2} , and the water An ink set for textile printing inkjet, which is a combination with an overcoat agent containing a resin having a film elongation of 100% to 400%.

  Another aspect of the present invention is a method for producing a printed material including the following steps: (1) a step of printing a fabric with the above-mentioned ink-jet ink by an ink-jet recording method, and (2) the above-mentioned overcoat agent. Applying to the fabric.

  According to the ink set for textile printing ink jet and the method for producing a textile print of the present invention, it is possible to provide a printed article excellent in not only the fastness to washing but also the fastness to friction in a printed material composed of various fibers. .

  Hereinafter, embodiments according to the present invention will be described, but the examples in the present embodiment do not limit the present invention.

  The textile ink jet ink set of the present invention is a combination of an ink jet ink (hereinafter sometimes simply referred to as “ink”) and an overcoat agent.

The ink of the present invention, the pigment is a film elongation of 400% to 1000%, and film strength are compositions comprising ^20N / mm ^{2 ~50N} / mm 2 in which a water-dispersible resin, and water.

  In order to ensure washing and friction fastness with respect to a base material that easily stretches such as a fabric, the ease of stretching of the ink film, that is, the film elongation is important. That is, since the ink film has an elongation that can expand and contract following the expansion and contraction of the fabric, the ink film can be prevented from being broken and cracked, and washing and friction fastness can be ensured. On the other hand, if the elongation of the resin is too large, the adhesion of the ink film to the substrate decreases, and the washing / friction fastness decreases, which is not preferable. This is presumably because the viscosity of the ink film becomes too strong to exert a sufficient anchor effect on the fiber surface.

  From such a viewpoint, the film elongation of the water dispersible resin is preferably in the range of 400% to 1000%. Furthermore, the film elongation of the water-dispersible resin is more preferably 500% to 1000%, and still more preferably 600% to 1000%.

Regarding the strength of the ink film, the film strength of the resin is important. When the film strength is 20 N / mm ² or more, the ink film can be prevented from being scraped by frictional force, and the fastness to friction can be increased. On the other hand, when the film strength exceeds 50 N / mm ² , the film becomes too hard when the ink film is formed, and the texture is lowered. The film strength is ^further more preferably ^{20N / mm 2 ~40N / mm 2} , and still more preferably ^{20N / mm 2 ~35N / mm 2} .

  The water-dispersible resin may be a self-emulsifying type into which a hydrophilic component necessary for stably dispersing in water is introduced, or may be water-dispersible by using an external emulsifier.

  The type of the water-dispersible resin is not particularly limited as long as it has the above-described film elongation and film strength. For example, an acrylic resin, an acrylic-styrene resin, a urethane resin, a vinyl acetate resin, Acrylic-vinyl acetate resin and the like, and combinations of two or more thereof can be used.

  Specifically, for example, Superflex 460, 460s, 470, 610, 700 in Superflex series manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Adekabon titer HUX-380 in Adekabon titer series manufactured by Adeka Co., Ltd. 290K, 290H, Takelac W-512A6 manufactured by Mitsui Chemicals Polyurethanes, etc. These are water-dispersible resins having a urethane skeleton. These resins can be used alone or in combination of two or more.

  The content of the water-dispersible resin (when the water-dispersible resin other than the resin having the physical properties defined in the present invention is included, the total amount including them) is 0.5 to 2. A range of 5 is preferable. Thereby, the compounding effect of water-dispersible resin can be exhibited appropriately. That is, if the mass ratio is less than 0.5 with respect to Pigment 1, sufficient washing / friction fastness may not be ensured. On the other hand, if it exceeds 2.5, the viscosity of the ink is affected and printability may be hindered.

  Furthermore, the content of the water-dispersible resin is preferably 30% by mass or less, and preferably 15% by mass with respect to the total amount of ink from the viewpoint of avoiding clogging of the head after leaving the ink and ensuring ease of return. More preferably, it is more preferably 10% by mass or less.

  As the pigment, those generally used in the technical field can be arbitrarily used. A white pigment is used for white ink, and a color pigment other than white is used for color ink.

  Specific examples of the white pigment include inorganic pigments such as titanium oxide, zinc white, zinc sulfide, antimony oxide, and zirconium oxide. Besides the inorganic pigment, hollow resin fine particles or polymer fine particles can also be used.

  The average particle size of the pigment is preferably 100 nm to 500 nm. When the average particle diameter of the pigment is less than 100 nm, the hiding power tends to be insufficient, and when it exceeds 500 nm, the ejection stability tends to be insufficient.

  Of these, titanium oxide is preferably used from the viewpoint of hiding power. Similarly, the average particle diameter of titanium oxide is preferably 100 nm to 500 nm. When titanium oxide is used, it is preferable to use one that has been surface-treated with alumina or silica in order to suppress the photocatalytic action. The surface treatment amount is preferably about 5 to 20% by weight in the pigment.

  Examples of color pigments include azo, condensed polycyclic, nitro, and nitroso organic pigments (brilliant carmine 6B, lake red C, watching red, disazo yellow, phthalocyanine blue, phthalocyanine green, alkali blue, aniline black, and the like. ), Metals such as cobalt, iron, chromium, zinc, lead, titanium, vanadium, manganese, nickel, metal oxides and sulfides, and inorganic pigments such as ocher, ultramarine, and bitumen, furnace carbon black, lamp black, Carbon blacks such as acetylene black and channel black can be used.

  Any one of these pigments may be used alone, or two or more may be used in combination.

  The pigment content (solid content) varies depending on the type of pigment used, but is preferably 1 to 30% by mass in the ink from the viewpoint of ensuring necessary color development. It is more preferable that it is mass%-15 mass%.

  In order to stably disperse the pigment in the ink, it is preferable to use a pigment dispersant represented by a polymer dispersant or a surfactant.

  As the polymer dispersant, for example, as a commercial product, Solsperse series (Solsperse 20000, 27000, 41000, 41090, 43000, 44000) manufactured by Nippon Lubrizol Co., Ltd., Johncrill series (Johncrill 57, manufactured by Johnson Polymer Co., Ltd.) 60, 62, 63, 71, 501), polyvinyl pyrrolidone K-30, K-90 manufactured by Daiichi Kogyo Seiyaku Co., Ltd. and the like.

  Examples of the surfactant include anionic surfactants such as the Kao Corporation Demall series (Demol N, RN, NL, RNL, T-45), and Kao Corporation Emulgen series (Emulgen A-60, A). Nonionic surfactants such as -90, A-500, B-40, L-40, 420).

  These pigment dispersants can be used in combination of two or more.

  The blending amount in the ink when a pigment dispersant is used varies depending on the type and is not particularly limited, but is generally 0.005 to 0.000 based on the pigment 1 in terms of mass ratio of the active ingredient (solid content). It is preferably used in the range of 5.

  Furthermore, a self-dispersing pigment whose surface is modified with a hydrophilic functional group can also be used. Examples of commercially available products include CAB-O-JET series (CAB-O-JET200, 300, 250C, 260M, 270C) manufactured by Cabot Corporation, CW-1, CW-2 manufactured by Orient Chemical Co., Ltd., and the like.

  You may use the microencapsulated pigment which coat | covered the pigment with resin.

  The water contained in the ink is not particularly limited, but water with few impurities, such as pure water such as ion exchange water and distilled water, and ultrapure water, is preferable. From the viewpoint of viscosity adjustment, water is preferably contained in the ink in an amount of 20% by mass to 80% by mass, and more preferably 30% by mass to 70% by mass.

  The ink of the present invention preferably contains a water-soluble organic solvent that is liquid at room temperature and can be dissolved in water, from the viewpoints of viscosity adjustment and moisturizing effect. Examples of such water-soluble organic solvents include ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, pentaethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, and other glycols, glycerin, acetins, Glycol derivatives such as triethylene glycol monomethyl ether, triethylene glycol monobutyl ether, tetraethylene glycol monomethyl ether, tetraethylene glycol dimethyl ether, tetraethylene glycol diethyl ether, triethanolamine, 1-methyl-2-pyrrolidone, β-thioglycol, Sulfolane and the like can be used. These water-soluble organic solvents can be used alone or in combination of two or more.

  The water-soluble organic solvent is preferably contained in the ink in an amount of 1% by mass to 80% by mass, and more preferably 10% by mass to 60% by mass, from the viewpoints of viscosity adjustment and a moisturizing effect.

  In the ink of the present invention, in addition to the above-mentioned components, a wetting agent (humectant), a surface tension adjusting agent (surfactant), an antifoaming agent, a fixing agent, and a pH adjusting agent within the range not impairing the effects of the present invention. , Antioxidants, preservatives and the like can be optionally contained.

  As the wetting agent, polyhydric alcohols can be used.

  As the surface tension adjusting agent, anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, or polymer-based, silicone-based, and fluorine-based surfactants may be used. it can.

  By blending this surfactant, it is preferable because ink can be stably ejected by an ink jet method and ink permeation can be appropriately controlled. The amount added varies depending on the type of surfactant, but is preferably in the range of 0.1% by mass to 10% by mass in the ink. When a large amount of the surfactant is added beyond this range, the surface tension of the ink is lowered, and as a result, the penetration of the ink on the fabric becomes too fast, and there is a possibility of hiding the concealability and color developability.

  Specifically, as an anionic surfactant, Kao Corporation Emar series (Emar 0, 10, 2F, 40, 20C), Neopelex series (Neopelex GS, G-15, G-25, G- 65), Pelex series (Pelex OT-P, TR, CS, TA, SS-L, SS-H), demole series (demole N, NL, RN, MS) and the like.

  Examples of the cationic surfactant include Acetamine series (Acetamine 24, 86) manufactured by Kao Corporation, Coatamine series (Coatamine 24P, 86P, 60W, 86W), Sanizol series (Sanisol C, B-50), and the like. Is mentioned.

  Nonionic surfactants include acetylene glycol surfactants such as Surfynol series (Surfinol 104E, 104H, 420, 440, 465, 485) manufactured by Air Products, and Emulgen series (Emulgen 102KG manufactured by Kao Corporation). , 103, 104P, 105, 106, 108, 120, 147, 150, 220, 350, 404, 420, 705, 707, 709, 1108, 4085, 2025G) and the like. It is done.

  Examples of the amphoteric surfactants include the Amphitol series (Amphithol 20BS, 24B, 86B, 20YB, 20N) manufactured by Kao Corporation.

  In order to adjust the viscosity and pH of the ink, an electrolyte can be added to the ink. Examples of the electrolyte include sodium sulfate, potassium hydrogen phosphate, sodium citrate, potassium tartrate, and sodium borate, and two or more kinds may be used in combination. Sulfuric acid, nitric acid, acetic acid, sodium hydroxide, potassium hydroxide, ammonium hydroxide, triethanolamine, and the like can also be used as an ink thickening aid or pH adjuster.

  By blending an antioxidant, it is possible to prevent the ink components from being oxidized and improve the storage stability of the ink. As the antioxidant, for example, L-ascorbic acid, sodium L-ascorbate, sodium isoascorbate, potassium sulfite, sodium sulfite, sodium thiosulfate, sodium dithionite, sodium pyrosulfite can be used.

  By blending a preservative, the ink can be prevented from being spoiled and the storage stability can be improved. Examples of the preservative include 5-chloro-2-methyl-4-isothiazolin-3-one, 2-methyl-4-isothiazolin-3-one, 2-n-octyl-4-isothiazolin-3-one, and 1 Isothiazolone preservatives such as 1,2-benzisothiazolin-3-one; triazine preservatives such as hexahydro-1,3,5-tris (2-hydroxyethyl) -s-triazine; 2-pyridinethiol sodium-1- Pyridine / quinoline preservatives such as oxide and 8-oxyquinoline; Dithiocarbamate preservatives such as sodium dimethyldithiocarbamate; 2,2-dibromo-3-nitrilopropionamide, 2-bromo-2-nitro-1,3 -Propanediol, 2,2-dibromo-2-nitroethanol, 1,2-dibromo-2,4-dicyano Brominated organic preservatives such as Tan; p-hydroxybenzoate, p- hydroxybenzoate ethyl, potassium sorbate, sodium dehydroacetate, can be used salicylic acid.

  The viscosity of the ink can be adjusted as appropriate, but is preferably 1 to 30 mPa · s, for example, from the viewpoint of ejection properties. This viscosity is the ink viscosity at 10 Pa when the shear stress is increased from 0 Pa at a rate of 0.1 Pa / s at 23 ° C.

  Next, the overcoat agent of the present invention will be described.

  The overcoat agent of the present invention is a composition containing a resin having a film elongation of 100% to 400%.

  The overcoat agent of the present invention is used for applying to the printing surface including at least the printing area after printing the above-described ink on the substrate.

  The ink of the present invention can improve the fastness of washing and friction to some extent by using only the ink, but it can further improve the fastness of friction by protecting the printing surface with the above-described overcoat agent.

  The film elongation of the overcoat agent is preferably 100% to 400%, and more preferably 150% to 350%. By being 400% or less, it is possible to prevent the ink film from being scraped by a frictional force, and to improve the fastness to friction. On the other hand, if it is less than 100%, the flexibility of the ink film is deteriorated and the texture may be lowered. Also, if the overcoat film has an excessively low film elongation, when the ink film expands and contracts with the fabric, the overcoat film cannot follow and expand and contract, and the ink film breaks and cracks. is there. Therefore, it is preferably 100% or more.

  By using such an ink and an overcoat agent, washing and friction fastness can be ensured from fabrics of all kinds to fabrics. For example, since cotton is a single fiber, there are many gaps between the fibers, and since it has an OH group, it easily retains moisture and easily penetrates the pigment. On the other hand, since polyester is a long fiber, there are few gaps between fibers, and it is difficult for a pigment to permeate and it is difficult to obtain strong washing fastness. Polyester is also a property in which the fiber itself is difficult to absorb water. According to the ink of the present invention, the ink can be firmly fixed even on a fabric made of fibers such as polyester that is difficult to penetrate, and the overcoat agent of the present invention is applied to the ink film. Therefore, it is possible to ensure the fastness to washing and friction. Of course, the present invention can be effectively applied to cotton, and the same applies to other fibers.

  The overcoat agent is preferably water based from the viewpoints of environmental load and safety. In addition, the resin used for the overcoat agent is preferably a water-dispersible resin from the viewpoint of water resistance. In this case, the overcoat agent contains a water acidic resin and water. The water-dispersible resin may be a self-emulsifying type into which a hydrophilic component necessary for stably dispersing in water is introduced, or may be water-dispersible by using an external emulsifier.

  The resin of the overcoat agent is not particularly limited in view of the object of the present invention as long as it has the above film elongation. For example, acrylic resin, acrylic-styrene resin, urethane resin, vinyl acetate resin, acrylic- A vinyl acetate resin etc. and these 2 or more types of combinations can be used. Specifically, Superflex 150, 410, 420, 650, E2500, R5002 in the Superflex series manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Takerak W615, W6010, W405, W635, WS5100, etc. manufactured by Mitsui Chemical Polyurethane Co., Ltd. , And combinations thereof.

  The content of the resin is preferably 1% by mass to 60% by mass and more preferably 3% by mass to 40% by mass with respect to the total amount of the overcoat agent in order to appropriately exhibit the effect. If it is added in a large amount exceeding 60% by mass, it becomes difficult to uniformly apply to the fabric, and there is a risk of reducing the commercial properties of the finished printed product.

  Although it does not specifically limit as water, Water with few impurities, such as pure water, such as ion-exchange water and distilled water, and ultrapure water, is preferable. The water content is not particularly limited and is preferably adjusted as appropriate from the viewpoint of viscosity adjustment.

  A water-soluble organic solvent can be added to the overcoat agent from the viewpoint of viscosity adjustment and a moisturizing effect. As such a water-soluble organic solvent, those similar to those blended in the ink can be used.

  In the overcoat agent of the present invention, additives generally blended in inks such as preservatives, viscosity adjusting agents, antioxidants, surfactants and the like may be optionally added. As such additives, the same additives as those blended into the ink can be used.

  Next, a method for producing a printed product using the ink of the present invention will be described. As the cloth, a cloth made of any natural or synthetic fiber such as cotton, silk, wool, hemp, nylon, polyester, rayon, or the like can be used. The ink of the present invention can provide a printed printed matter having high washing and friction fastness to fabrics of various materials.

  The method for producing a printed product of the present invention includes (1) a step of printing a fabric with the above-described ink-jet ink by an inkjet recording method, and (2) a step of applying the above-described overcoat agent to the fabric.

  In step (1), printing is performed by an ink jet recording method. The ink jet printer to be used may be of any method such as a piezo method, an electrostatic method, or a thermal method, and ink droplets are ejected from an ink jet head based on a digital signal. Can be allowed to adhere to the fabric to which the pretreatment agent has been applied.

  If the fabric is a dark color, the color developability of the ink may be reduced. Therefore, by first printing the white ink on the printed portion on the fabric and overlaying the color ink on the printed portion, it is possible to obtain a printed material with good color developability. On the other hand, for the case where the fabric is white, it is possible to obtain a printed matter having excellent color developability simply by printing the color ink. Excellent texture and breathability.

The amount of ink applied is not particularly limited, but it is preferably 500 g / m ² or less per unit area of the fabric from the viewpoint of texture.

  In step (2), the above-described overcoat agent is applied to the fabric on which the ink has been printed in step (1).

  The method for applying the overcoat agent to the fabric is not particularly limited, and any method such as a spray method, a dipping method, a pad method, or a coating method can be used, and an ink jet recording method or a screen printing method can be used. Good.

  The overcoat agent is applied to at least an area where ink is printed on the fabric. You may apply | coat to the fabric whole surface containing a printing area | region.

The coating amount of the overcoating agent is per unit area of the fabric ^is preferably ^{1g / m 2 ~500g / m 2} , and more preferably ^{10g / m 2 ~100g / m 2} . By being in this range, it is possible to achieve both improvement in fastness and suppression of texture reduction.

  After the printing step in step (1) and after application of the overcoat agent in step (2), it is preferable to perform a heat treatment at about 100 ° C. to 180 ° C. on the fabric. By heat treatment after the step (1), the ink can be dried and a water-dispersible resin can be formed to form a strong ink film. The heat treatment after the step (2) is for forming a strong ink film by forming a resin film, and also for drying the water when the overcoat agent contains water.

  In the step (1), when printing white ink and color ink, it is only necessary to perform heat treatment after color ink printing.

  The heat treatment conditions are not particularly limited. For example, both the heat treatment after step (1) and the heat treatment after step (2) are preferably performed at 160 ° C. for about 60 seconds.

  EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to these.

  Using the components shown in Table 1, inks and overcoat agents of Examples and Comparative Examples were prepared. In Table 1, self-dispersing pigment CW-2 (solid content 15%) manufactured by Orient Chemical Industry Co., Ltd. was used as the self-dispersing pigment. Surfactor 465 manufactured by Air Products was used as the surfactant (used as a surface tension adjusting agent). Ethylene glycol and glycerin were manufactured by Wako Pure Chemical Industries, Ltd. Table 2 shows water-dispersible resins used for the ink and overcoat agent.

  With respect to the film elongation and film strength of the water-dispersible resin of the ink and the film elongation of the resin of the overcoat agent, each physical property was measured according to the following procedure. The results are shown in Table 1.

<Coating strength>
A water-dispersible resin is applied onto the polytetrafluoroethylene sheet so that the film thickness after drying is 500 μm, dried at room temperature for 15 hours, and further dried at 80 ° C. for 6 hours and 120 ° C. for 20 minutes. After performing, it peeled from the sheet | seat and produced the water-dispersible resin film.

  Using a Tensilon universal testing machine RTC-1225A (manufactured by Orientec Co., Ltd.), the obtained resin film was subjected to a tensile test at a measurement temperature of 20 ° C. and a measurement speed of 200 mm / min to measure the breaking strength, that is, the film strength.

<Film elongation>
A water-dispersible resin film is prepared in the same manner as the film strength measurement, and the resin film is stretched under the same measurement conditions and the length of the resin film stretched until it breaks is measured. Expressed as:

<Preparation of color (black) ink>
Each component was mixed so as to have the composition shown in Table 1 (both are expressed in solid content), and coarse particles were removed with a 5 μm membrane filter to prepare black inks of Examples and Comparative Examples.

  <Preparation of overcoat agent>

  Each component was mixed so that it may become the mixing | blending shown in Table 1 (both are displayed by the amount of solid content), and the overcoat agent of the Example and the comparative example was prepared.

<Production of printed matter>
Using each of the obtained inks and the overcoat agent, textile printing was performed as follows.

  As the fabric, a white T-shirt of 100% cotton was used in Example 1, and a white T-shirt of 100% polyester was used in the other Examples and Comparative Examples.

  Ink was introduced into a textile printer “MMP813BT” manufactured by Mastermind, solid printing of 1440 dpi × 720 dpi and 80 mm × 80 mm was performed on the fabric with black ink, and heat treatment was performed at 160 ° C. for 1 minute.

Next, an overcoat agent was applied using an air spray so as to be 60 g / m ² with respect to the printed matter, and heat treatment was performed at 160 ° C. for 1 minute.

  In addition, as Comparative Example 1, a material without an overcoat agent was produced, and the others were produced in the same manner as described above.

  The obtained printed matter was evaluated as follows. The results are also shown in Table 1.

<Washing fastness>
Using a fully automatic washing machine ASW-45A1 manufactured by Sanyo Electric Co., Ltd., each printed material was washed 10 times, and the presence or absence of ink peeling was visually observed.
○: No ink peeling ×: Ink peeling

<Friction fastness>
The test was conducted using a type I tester according to the method defined in JIS L0849. Dry friction was tested according to the dry test specified in JIS L0849, and wet friction was tested according to the wet test specified in JIS L0849, and evaluated using a contaminated gray scale.
A: Grade 4-5 to Grade 5: Grade 3-4 to Grade 4: Grade 2-3 to Grade 3 x: Grade 2 or lower

  As shown in Table 1, with the inks of the examples, strong washing fastness and friction fastness were obtained. On the other hand, with the ink of the comparative example, sufficient fastness could not be obtained. From these comparative examples, it was found that the film elongation and film strength of the water-dispersible resin of the ink and the film elongation of the resin of the overcoat agent are important.

Claims (3)

Pigment, an inkjet ink containing a water-dispersible resin, and the water is film elongation is 400% to 1000%, and the film strength of ^{20N / mm 2 ~50N / mm 2} ,
It is a combination with an overcoat agent containing a resin having a film elongation of 100% to 400%.
Ink set for textile printing inkjet.   The textile ink jet ink set according to claim 1, wherein the resin of the overcoat agent is a water-dispersible resin, and the overcoat agent further contains water. A method for producing a printed product comprising the following steps:
(1) A step of printing a fabric with the ink jet ink described in claim 1 or 2 by an ink jet recording method, and (2) a step of applying the overcoat agent described in claim 1 or 2 to the fabric.