JP6202474B2 - Inkjet ink composition for textile printing - Google Patents

Description

  The present invention relates to an inkjet ink composition for textile printing.

The inkjet recording method is capable of recording high-definition images with a relatively simple device.
Rapid development in various areas. For example, Patent Document 1 discloses an improved gradation feeling (single color separation) having a mixed color portion of the formed image, excellent ink dispersion stability, color reproducibility of the formed image, and image storage stability. In order to provide an ink set for ink jet recording with good quality, it is composed of at least yellow ink, magenta ink and cyan ink, and each color ink contains water, a water-soluble organic solvent, a disperse dye and a dispersant. In the ink set for ink-jet recording contained therein, an ink set for ink-jet recording is disclosed in which the same dispersant is used for each color ink.

JP 2004-285218 A

However, when using disperse dyes, disperse dyes are precipitated due to temperature changes in the storage environment of the ink composition, resulting in a decrease in storage stability, and disperse dyes are precipitated due to drying of the ink composition near the nozzle opening. However, there is a problem in that intermittent characteristics (inhibition of nozzle missing after carriage idle running) are deteriorated.

In addition, when the disperse dye is a sublimation dye, there is a problem that bleeding occurs in the obtained recorded matter if the drying time of the intermediate recording medium is shortened in order to improve the recording speed.

SUMMARY An advantage of some aspects of the invention is that it provides an inkjet ink composition for textile printing that is excellent in storage stability and intermittent characteristics.

The present inventors diligently studied to solve the above problems. As a result, the inventors have found that the above problems can be solved by using naphthalene sulfonate and lignin sulfonate together at a predetermined mass ratio, and have completed the present invention.

That is, the present invention is as follows.
[1]
A disperse dye and a dispersant,
The dispersant comprises naphthalene sulfonate and lignin sulfonate;
The mass ratio of lignin sulfonate to naphthalene sulfonate is 10 / 100-7.
5/100,
The content of the dispersant is 5.0 to 13% by mass.
Inkjet ink composition for textile printing.
[2]
The inkjet ink composition for textile printing according to the above item [1], wherein the disperse dye contains a sublimable dye having a molecular weight of 380 or less.
[3]
The inkjet ink composition for textile printing according to the above item [1] or [2], wherein the disperse dye contains a sublimable dye having a molecular weight of 350 or less.
[4]
The inkjet ink composition for textile printing according to any one of [1] to [3], wherein a content of the disperse dye is 2.0 to 12% by mass.
[5]
The mass ratio of the lignin sulfonate to the naphthalene sulfonate is 30
The inkjet ink composition for textile printing according to any one of [1] to [4], which is / 100 to 50/100.
[6]
Any one of the preceding items [1] to [5], wherein the content of the dispersant is 8.5 to 11% by mass.
The inkjet ink composition for textile printing described in the item.

DESCRIPTION OF EMBODIMENTS Hereinafter, a mode for carrying out the present invention (hereinafter referred to as “the present embodiment”) will be described in detail. However, the present invention is not limited to this, and various modifications can be made without departing from the gist thereof. Is possible.

[Inkjet ink composition for textile printing]
The inkjet ink composition for textile printing of the present embodiment includes a disperse dye and a dispersant,
The dispersant includes naphthalene sulfonate and lignin sulfonate, the mass ratio of lignin sulfonate to naphthalene sulfonate is 10/100 to 75/100, and the content of the dispersant is 5.0 to 13% by mass.

[Disperse dye]
Although it does not specifically limit as a yellow disperse dye, For example, C.I. I. Disperse
Yellow 3, 4, 5, 7, 9, 13, 23, 24, 30, 33, 34, 42, 44
49, 50, 51, 54, 56, 58, 60, 63, 64, 66, 68, 71, 74,
76, 79, 82, 83, 85, 86, 88, 90, 91, 93, 98, 99, 100,
104, 108, 114, 116, 118, 119, 122, 124, 126, 135,
140, 141, 149, 160, 162, 163, 164, 165, 179, 180,
182, 183, 184, 186, 192, 198, 199, 202, 204, 210,
211, 215, 216, 218, 224, 227, 231, 232 and the like.

Although it does not specifically limit as an orange disperse dye, For example, C.I. I. Disperse
Orange 1, 3, 5, 7, 11, 13, 17, 20, 21, 25, 29, 30, 3
1, 32, 33, 37, 38, 42, 43, 44, 45, 46, 47, 48, 49, 50
53, 54, 55, 56, 57, 58, 59, 61, 66, 71, 73, 76, 78,
80, 89, 90, 91, 93, 96, 97, 119, 127, 130, 139, 142
Etc.

Although it does not specifically limit as a red disperse dye, For example, C.I. I. Disperse
Red1, 4, 5, 7, 11, 12, 13, 15, 17, 27, 43, 44, 50, 52
53, 54, 55, 56, 58, 59, 60, 65, 72, 73, 74, 75, 76,
78, 81, 82, 86, 88, 90, 91, 92, 93, 96, 103, 105, 10
6, 107, 108, 110, 111, 113, 117, 118, 121, 122, 12
6, 127, 128, 131, 132, 134, 135, 137, 143, 145, 14
6, 151, 152, 153, 154, 157, 159, 164, 167, 169, 17
7, 179, 181, 183, 184, 185, 188, 189, 190, 191, 19
2, 200, 201, 202, 203, 205, 206, 207, 210, 221, 22
4, 225, 227, 229, 239, 240, 257, 258, 277, 278, 27
9, 281, 288, 298, 302, 303, 310, 311, 312, 320, 32
4, 328 and the like.

Although it does not specifically limit as a violet disperse dye, For example, C.I. I. Disper
se Violet 1, 4, 8, 23, 26, 27, 28, 31, 33, 35, 36, 3
8, 40, 43, 46, 48, 50, 51, 52, 56, 57, 59, 61, 63, 69
77 and the like.

Although it does not specifically limit as a green disperse dye, For example, C.I. I. Disperse
Green9 etc. are mentioned.

Although it does not specifically limit as a brown disperse dye, For example, C.I. I. Disperse
Brown1,2,4,9,13,19 etc. are mentioned.

Although it does not specifically limit as a blue disperse dye, For example, C.I. I. Disperse
Blue3, 7, 9, 14, 16, 19, 20, 26, 27, 35, 43, 44, 54,
55, 56, 58, 60, 62, 64, 71, 72, 73, 75, 79, 81, 82, 8
3, 87, 91, 93, 94, 95, 96, 102, 106, 108, 112, 113,
115, 118, 120, 122, 125, 128, 130, 139, 141, 142,
143, 146, 148, 149, 153, 154, 158, 165, 167, 171,
173, 174, 176, 181, 183, 185, 186, 187, 189, 197,
198, 200, 201, 205, 207, 211, 214, 224, 225, 257,
259, 267, 268, 270, 284, 285, 287, 288, 291, 293,
295, 297, 301, 315, 330, 333 and the like.

Although it does not specifically limit as a black disperse dye, For example, C.I. I. Disperse
Black1, 3, 10, 24 etc. are mentioned.

(Sublimation dye)
The disperse dye preferably contains a sublimable dye. Here, the “sublimation dye” is a dye having a property of sublimation by heating. Conventionally, dyeing of a recording medium using sublimation transfer has been widely performed. As a dyeing method using such sublimation transfer, for example, after performing printing by an inkjet method using an ink containing a sublimation dye on a sheet-like intermediate transfer medium such as paper, the intermediate transfer medium is used as a recording medium. And by sublimation transfer by heating, or printing by an ink jet method using an ink composition on an ink receiving layer of a recording medium (film product etc.) provided with a peelable ink receiving layer, There is a method of heating as it is, performing sublimation diffusion dyeing on the recording medium on the lower layer side, and then peeling the ink receiving layer. In this embodiment, even if the disperse dye contains a sublimation dye, the occurrence of bleeding in the obtained recorded matter is suppressed, and the effect of excellent bleeding resistance is obtained.

Although it does not specifically limit as a sublimation dye, For example, C.I. I. Disperse Ye
llow 3, 7, 8, 23, 39, 51, 54, 60, 71, 86; C.I. I. Disp
erse Orange 1, 1: 1, 5, 20, 25: 1, 33, 56, 76; I
. Disperse Brown 2; C.I. I. Disperse Red 11, 50
53, 55, 55: 1, 59, 60, 65, 70, 75, 93, 146, 158, 19
0, 190: 1, 207, 239, 240; I. Bad Red 41; C.I. I. D
isperse Violet 8, 17, 23, 27, 28, 29, 36, 57;
I. Disperse Blue 14, 19, 26, 26: 1, 35, 55, 56, 58
, 60, 64, 64: 1, 72, 72: 1, 81, 81: 1, 91, 95, 108, 13
1, 141, 145; I. Solvent Blue 36, 63, 105, 111
C. I. Solvent Violet 13 etc. are mentioned.

The molecular weight of the disperse dye is preferably 380 or less, and more preferably 350 or less. The lower limit of the molecular weight of the disperse dye is not particularly limited, but is preferably 270 or more. A dye having a low molecular weight has a relatively high solubility in the ink composition.
It is difficult to ensure storage stability. In particular, when the storage environment of the ink composition becomes high temperature,
The solubility of the low molecular weight dye in the ink composition is further increased, and when the storage environment of the ink composition returns to room temperature, the dissolved dye recrystallizes to generate foreign matter. Such foreign matters cause ink jet nozzle clogging and the like, and lower the ejection stability. Therefore, the present invention is particularly useful when a disperse dye having a molecular weight of 380 or less is used.
Further, when a sublimation dye is used as the disperse dye, the molecular weight is 380 or less,
The sublimation property of the sublimation dye is improved, and the color developability of the obtained recorded product tends to be more excellent.

The content of the disperse dye is preferably 2.0 to 12% by mass, more preferably 2.0 to 10% by mass, and further preferably 2.0 to 7% by mass with respect to the total amount of the ink composition. 5% by mass. When the content of the disperse dye is 2.0% by mass or more, the color developability of the obtained recorded matter tends to be further improved. Further, when the disperse dye content is 7.5% by mass or less, the ejection stability and the storage stability tend to be further improved.

[Dispersant]
The dispersant includes naphthalene sulfonate and lignin sulfonate. Naphthalene sulfonate is particularly excellent in storage stability in a storage environment from room temperature to low temperature. On the other hand,
Lignin sulfonate is particularly excellent in storage stability in a storage environment from room temperature to high temperature. The ink composition of the present embodiment includes both naphthalene sulfonate and lignin sulfonate, thereby exhibiting high storage stability in a wide temperature range.

Moreover, when using only a naphthalene sulfonate or only a lignin sulfonate, it is necessary to increase the addition amount in order to ensure storage stability. However, when the amount of naphthalene sulfonate or lignin sulfonate added is increased, there is a problem that intermittent characteristics are deteriorated. On the other hand, the ink composition of this embodiment exhibits high intermittent characteristics by including both naphthalene sulfonate and lignin sulfonate.

Although it does not specifically limit as a naphthalenesulfonic acid salt, For example, naphthalenesulfonic acid sodium salt, naphthalenesulfonic acid alkali metal salts, such as lithium and potassium, and naphthalenesulfonic acid ammonium salt are mentioned. Naphthalene sulfonate may be used alone or in combination of two or more.

Although it does not specifically limit as a lignin sulfonate, For example, lignin sulfonate sodium salt, lignin sulfonate alkali metal salts, such as lithium and potassium, and lignin sulfonate ammonium salt are mentioned. A lignin sulfonate may be used individually by 1 type, and may use 2 or more types together.

The mass ratio of lignin sulfonate to naphthalene sulfonate (lignin sulfonate / naphthalene sulfonate) is 10/100 to 75/100, preferably 30
/ 100 to 50/100. When the mass ratio of lignin sulfonate to naphthalene sulfonate is 10/100 or more, the storage stability tends to be further improved.
Moreover, when the mass ratio of lignin sulfonate to naphthalene sulfonate is 75/100 or less, the intermittent characteristics tend to be further improved.

The content of the dispersant is 5.0 to 13% by mass, preferably 7.0 to 12% by mass, and more preferably 8.5 to 11% by mass with respect to the total amount of the ink composition. . When the content of the dispersant is 5.0% by mass or more, the storage stability tends to be further improved. Moreover, it exists in the tendency for an intermittent characteristic to improve more because content of a dispersing agent is 13 mass% or less.

(water)
The ink composition may contain water. Although it does not specifically limit as water, For example, it is preferable to use pure water, such as ion-exchange water, ultrafiltration water, reverse osmosis water, distilled water, or ultrapure water. In particular, water obtained by sterilizing these waters by ultraviolet irradiation or addition of hydrogen peroxide tends to prevent generation of mold and bacteria over a long period of time.

The water content is preferably 55 to 85% by mass, more preferably 60 to 80% by mass, and still more preferably 65 to 75% by mass with respect to the total amount of the ink composition.

(Humectant)
The ink composition may further contain a humectant. By including the humectant, the ejection stability tends to be further improved. As such a humectant, a compound used as a water-soluble organic solvent in a normal ink can be used, for example, lower alcohols such as ethanol or propanol; glycerin, ethylene glycol, diethylene glycol, triethylene glycol, Tetraethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monobutyl ether, or triethylene glycol monobutyl ether, 1,3-propanediol 1,4-butanediol, 1,2-
Hexanediol, 1,5-pentanediol, 1,6-hexanediol, 1,2,6
-Polyols such as hexanetriol or pentaerythritol, and derivatives thereof such as ethers or esters thereof; lactams such as 2-pyrrolidone, N-methyl-2-pyrrolidone, or ε-caprolactam; thiourea, ethyleneurea, or 1 And ureas such as 3-dimethylimidazolidinones; and sugars such as maltitol, sorbitol, gluconolactone, or maltose. In addition, a moisturizer may be used individually by 1 type, or may use 2 or more types together.

The content of the humectant is preferably 5.0 to 25% by mass, more preferably 7.5 to 22.5% by mass, and further preferably 10 to 20% by mass with respect to the total amount of the ink composition. %
It is. When the content of the humectant is within the above range, the ejection stability tends to be further improved.

(Surfactant)
The ink composition may further contain a surfactant. The surfactant is not particularly limited, and examples thereof include acetylene glycol surfactants, fluorine surfactants, and polysiloxane surfactants.

Among these, polysiloxane surfactants are more preferable because the solubility in the ink composition is increased and foreign matters are less likely to be generated in the ink composition.

Although it does not specifically limit as an acetylene glycol type surfactant, For example, 2, 4,
Alkylene oxide adducts of 7,9-tetramethyl-5-decyne-4,7-diol and 2,4,7,9-tetramethyl-5-decyne-4,7-diol, and 2,4-dimethyl- One or more selected from alkylene oxide adducts of 5-decyn-4-ol and 2,4-dimethyl-5-decyn-4-ol are preferred. Although it does not specifically limit as a commercial item of acetylene glycol-type surfactant, For example, E series (A product made by Air Products Japan (Inc)) (Surfinol 465), such as Olfine 104 series and Olfine E1010, Surfynol 61 (Nissin Chemi
cal Industry CO., Ltd.)). One acetylene glycol surfactant may be used alone, or two or more acetylene glycol surfactants may be used in combination.

The fluorosurfactant is not particularly limited. For example, perfluoroalkyl sulfonate, perfluoroalkyl carboxylate, perfluoroalkyl phosphate, perfluoroalkyl ethylene oxide adduct, perfluoroalkyl betaine, perfluoroalkyl betaine, A fluoroalkylamine oxide compound is mentioned. Although it does not specifically limit as a commercial item of a fluorochemical surfactant, For example, S-144, S-145 (Asahi Glass Co., Ltd. product);
FC-170C, FC-430, Florard-FC4430 (manufactured by Sumitomo 3M Limited)
FSO, FSO-100, FSN, FSN-100, FS-300 (manufactured by Dupont); FT-250, 251 (manufactured by Neos Co., Ltd.) and the like. A fluorine-type surfactant may be used individually by 1 type, and may use 2 or more types together.

Examples of silicone surfactants include polysiloxane compounds and polyether-modified organosiloxanes. Although it does not specifically limit as a commercial item of a silicone type surfactant, Specifically, BYK-306, BYK-307, BYK-333, BYK-34
1, BYK-345, BYK-346, BYK-347, BYK-348, BYK-34
9 (trade name, manufactured by Big Chemie Japan Co., Ltd.), KF-351A, KF-352
A, KF-353, KF-354L, KF-355A, KF-615A, KF-945,
KF-640, KF-642, KF-643, KF-6020, X-22-4515, K
F-6011, KF-6012, KF-6015, KF-6017 (above trade names, manufactured by Shin-Etsu Chemical Co., Ltd.) and the like.

The content of the surfactant is preferably 0.20 to 1.4% by mass, more preferably 0.40 to 1.2% by mass, and still more preferably 0.000% by mass with respect to the total amount of the ink composition. 60 ~
1.0% by mass. When the content of the surfactant is within the above range, the wettability to the intermediate transfer medium is increased and the penetrability of the ink composition tends to be more excellent.

(Other additives)
The ink composition may further include an antifungal agent, an antiseptic, an antioxidant, an ultraviolet absorber,
A chelating agent, an oxygen absorbent, a pH adjuster (for example, triethanolamine, adipic acid, potassium hydroxide), a solubilizing agent, and other various additives that can be used in ordinary inks may be included. In addition, various additives may be used individually by 1 type, or may use 2 or more types together.

〔Recording method〕
Next, an example of a method for recording a recorded matter using the ink composition of the present embodiment will be described.
The recording method when the disperse dye is not a sublimable dye is not particularly limited.
There is a method of obtaining a recorded matter by attaching the ink composition of the present embodiment to a recording medium by an inkjet method.

In addition, the recording method when the disperse dye is a sublimation dye is not particularly limited. For example, an ink attachment step of attaching the ink composition of the present embodiment to an intermediate transfer medium by an inkjet method, and an ink composition A drying step of drying the intermediate transfer medium to which the ink composition is attached, and a transfer step of heating the intermediate transfer medium to which the ink composition is attached to transfer the sublimation dye constituting the ink composition onto the recording medium. Is mentioned. Hereinafter, each step of the recording method when the disperse dye is a sublimable dye will be described in detail.

(Ink adhesion process)
In the ink attaching step, the ink composition of the present embodiment is attached to the intermediate transfer medium by an inkjet method. The ink composition can be ejected by an ink jet method using a known ink jet recording apparatus. As a discharging method, a piezo method, a method of discharging ink by bubbles generated by heating the ink, or the like can be used.
Among these, the piezo method is preferable from the viewpoint of difficulty in altering the ink composition.

In the ink attaching step, an ink composition other than the ink composition of the present embodiment may be used.
Thereby, for example, the color gamut that can be expressed can be made wider.

(Intermediate transfer medium)
The intermediate transfer medium is not particularly limited, and for example, paper such as plain paper, a recording medium provided with an ink receiving layer (referred to as ink jet dedicated paper, coated paper, or the like) can be used. Among these, paper having an ink receiving layer made of inorganic fine particles such as silica is preferable. This makes it possible to obtain an intermediate transfer medium in which bleeding or the like is suppressed in the process of drying the ink composition adhering to the intermediate transfer medium. Further, in the subsequent transfer process, the sublimation dye can be sublimated more smoothly. It tends to progress.

(Drying process)
The drying step is a step of drying the intermediate transfer medium to which the ink composition is attached. Although depending on the drying temperature, the drying time is preferably 20 minutes or less at room temperature, more preferably 10 minutes or less, and even more preferably 5 minutes or less.

(Transfer process)
Thereafter, the intermediate transfer medium to which the ink composition is adhered is heated to transfer the sublimation dye constituting the ink composition to the recording medium. Thereby, a recorded matter is obtained.

The heating temperature in this step is preferably 160 ° C. or higher and 220 ° C. or lower, and is 170 ° C. or higher and 200 ° C.
The following is more preferable. When the heating temperature is within the above range, the energy required for transfer can be reduced, and the productivity of recorded matter tends to be superior. Further, the color development of the obtained recorded matter tends to be more excellent.

Although the heating time in this step depends on the heating temperature, it is preferably 30 seconds or longer and 90 seconds or shorter.
More preferably, it is at least 80 seconds. When the heating time is within the above range, energy required for transfer can be reduced, and the productivity of recorded matter tends to be excellent. Further, the color development of the obtained recorded matter tends to be more excellent.

In addition, this step can also be performed by heating the surface of the intermediate transfer medium to which the ink composition is attached while facing the recording medium at a predetermined interval. It can also be performed by heating in a state where these are in close contact with each other. Among these, it is preferable to perform the heating by heating the intermediate transfer medium and the recording medium in close contact with each other. Thereby, the energy required for the transfer can be reduced, and the productivity of recorded matter tends to be superior. Further, the color development of the obtained recorded matter tends to be more excellent.

(Recording medium)
Although it does not specifically limit as a recording medium, For example, a cloth (hydrophobic fiber cloth etc.), a resin (plastic) film, paper, glass, a metal, ceramics etc. are mentioned. Further, as the recording medium, a material having a three-dimensional shape such as a sheet shape, a spherical shape or a rectangular parallelepiped shape may be used.

When the recording medium is a fabric, the fiber constituting the fabric is not particularly limited.
Examples thereof include polyester fiber, nylon fiber, triacetate fiber, diacetate fiber, polyamide fiber, and a blended product using two or more of these fibers. Moreover, you may use the blended products of these with regenerated fibers, such as rayon, or natural fibers, such as cotton, silk, and wool.

In addition, when the recording medium is a resin (plastic) film, the resin (plastic) film that can be used is not particularly limited. For example, a polyester film, a polyurethane film, a polycarbonate film, a polyphenylene sulfide film,
Examples thereof include a polyimide film and a polyamideimide film. Resin (plastic)
The film may be a laminate in which a plurality of layers are laminated, or may be composed of a gradient material in which the composition of the material changes in a gradient manner.

In addition, the ink composition of the present embodiment can be suitably used in sublimation transfer without using an intermediate transfer medium. Sublimation transfer without using an intermediate transfer medium is not particularly limited. For example, the ink composition of the present embodiment is applied to an ink receiving layer of a recording medium (film product or the like) provided with a peelable ink receiving layer by an inkjet method. The step of adhering the material and the recording medium provided with the ink receiving layer to which the ink composition is attached are heated as they are, from the ink receiving layer,
Examples thereof include a method having a step of sublimation diffusion dyeing on the recording medium on the lower layer side and a step of separating the ink receiving layer from the recording medium to obtain a recorded matter.

Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples. The present invention is not limited in any way by the following examples.

[Material for ink composition]
The main materials for the ink compositions used in the following examples and comparative examples are as follows.
[Disperse dye]
C. I. Dispers Red 60
C. I. Solvent Violet 13
C. I. Dispers Blue 60
[Dispersant]
Naphthalenesulfonic acid sodium salt Lignin sulfonic acid sodium salt [humectant]
Glycerin (surfactant)
BYK348 (silicone surfactant, manufactured by BASF)

[Preparation of ink composition]
Each material was mixed with the composition shown in Table 1 below, and stirred sufficiently to obtain each ink composition. In Table 1 below, the numerical unit is mass%, and the total is 100.0 mass%.

[Storage stability]
The ink composition passed through a membrane filter (JCWP04700) having a diameter of 10 μm was put in a sample bottle and allowed to stand at 60 ° C. for 1 week. Thereafter, the storage stability was evaluated based on the state of occurrence of foreign matters when passing through a metal filter (area 0.8 mm ² , thickness 10 μm) having a diameter of 10 μm. The evaluation criteria are shown below.
(Evaluation criteria)
A: The number of foreign matters was 2/10 mL or less.
B: 3-10 particles / 10 mL of foreign matters were generated.
C: 11 foreign matters or 10 mL or more were generated.

[Intermittent characteristics]
The ink composition obtained above was filled in an ink cartridge and mounted on an ink jet printer (PX-H6000, manufactured by Seiko Epson Corporation). Then, using a printer driver, the ink composition was filled in the printer head, and it was confirmed that there was no clogged nozzle and normal recording was possible.

After the carriage is driven for 5.0 seconds without ink being ejected, the intermediate transfer medium (Tr
ink droplets were ejected onto ansjetSportsline9310 (Cham Paper). The operating environment of the printer was 23 ° C. and 50 RH%. The number of nozzles in which nozzle omission occurred was measured, and the intermittent characteristics were evaluated according to the following evaluation criteria.
A: No nozzle missing.
B: Nozzle omission occurred at 0% to 10% or less of the entire nozzle.
C: Nozzle omission occurred when the total nozzle exceeded 10%.

[Bleed resistance]
Inkjet printers (PX-H6000, manufactured by Seiko Epson Corporation) were each filled with the obtained ink composition, and it was confirmed that they could be ejected from inkjet nozzles. Using this ink jet printer (PX-H6000, manufactured by Seiko Epson Corporation), each ink composition was adhered to each intermediate recording medium to record a patch. The size and shape of the patch is 3c
m × 3 cm square.

After recording on each intermediate recording medium, each intermediate recording medium was left for 5 minutes in an environment of 23 ° C. and 50 RH%. Thereafter, the surface of each intermediate recording medium on which the patch is recorded is heated to 200 ° C. for 60 seconds with the recording medium (Amina manufactured by Toray Industries, Inc.) facing each other, and included in the ink composition. Each disperse dye was transferred to a recording medium to obtain each recorded matter. Each recorded matter had a recording surface corresponding to the patch of the intermediate recording medium.

In the same manner as described above, a recorded matter was also produced when the standing time was 10 minutes and 120 minutes. The bleed on the recording surface corresponding to the patch of each recorded matter was visually observed, and bleeding was evaluated according to the following evaluation criteria.
(Evaluation criteria)
A: No bleeding occurred even when left for 5 minutes.
B: Bleeding occurred when the standing time was 5 minutes, but no bleeding occurred when the standing time was 10 minutes.
C: Bleeding occurred when the standing time was 10 minutes, but no bleeding occurred when the standing time was 120 minutes. Alternatively, bleeding occurred even when the standing time was 120 minutes.

Claims (6)

A disperse dye and a dispersant,
The dispersant comprises naphthalene sulfonate and lignin sulfonate;
The mass ratio of lignin sulfonate to naphthalene sulfonate is 10 / 100-7.
5/100,
The content of the dispersant is 5.0 to 13% by mass.
Inkjet ink composition for textile printing. The inkjet ink composition for textile printing according to claim 1, wherein the disperse dye contains a sublimable dye having a molecular weight of 380 or less. The inkjet ink composition for textile printing according to claim 1 or 2, wherein the disperse dye contains a sublimation dye having a molecular weight of 350 or less. The inkjet ink composition for textile printing according to any one of claims 1 to 3, wherein a content of the disperse dye is 2.0 to 12% by mass. The mass ratio of the lignin sulfonate to the naphthalene sulfonate is 30
The inkjet ink composition for textile printing according to any one of claims 1 to 4, which is / 100 to 50/100. The inkjet ink composition for textile printing according to any one of claims 1 to 5, wherein the content of the dispersant is 8.5 to 11% by mass.