JP2008266466A - Inkjet ink and method for dyeing composite fiber product therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ink which is an inkjet ink containing both a disperse dye and a water-soluble dye and exhibiting excellent stability and to provide a method for dyeing a composite fiber product therewith. <P>SOLUTION: The ink comprises one or more disperse dyes, one or more water-soluble dyes, and one or more dispersants, wherein the difference between the inorganicity/organicity ratio of the dispersant and that of the disperse dye is 0-1, and the difference between the inorganicity/organicity ratio of the dispersant and that of the water-soluble dye is 2 or larger. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an inkjet ink containing a disperse dye and a water-soluble dye, and a dyeing method for dyeing a composite fiber product composed of two or more kinds of fibers using this ink.

  When dyeing a composite material in which two or more kinds of fibers are blended, it is necessary to use a dye suitable for each fiber. Examples of the composite fibers include polyester-based synthetic fibers, acetate fibers such as diacetate and triacetate, cellulose fibers such as cotton and rayon, and polyamide fibers such as nylon. In the case of dyeing by inkjet, dyeing can be performed by using a plurality of heads separately containing two or more dyes, for example, reactive ink and dispersed ink.

  However, if the number of heads is doubled, there are problems such as an increase in the size and cost of the printer. On the other hand, if the number of heads, that is, the number of inks, is dyed, the dot granularity of the dyed matter increases and the expressive power decreases. There is a problem.

  On the other hand, when an ink containing two or more kinds of dyes is used at the same time, since many types (colors and densities) of ink can be used in a limited number of heads, the dot granularity is reduced, The color gamut becomes wider and the expressive power is improved.

  In response to the above problems, for example, Patent Document 1 (Japanese Patent Laid-Open No. 10-330661) discloses an anionic oligomer dispersion having a functional group as a dispersant for a disperse dye in a disperse dye ink for ink jet printing used in an ink jet printing system. The water-soluble high-boiling organic solvent in the ink has a surface tension of 46 dyne / cm or more and the inorganic / organic value is 2 to 6, and the water-soluble high-boiling organic solvent is used in the ink. Disperse dye inks having a viscosity of 10 cp or less at 25 ° C. are disclosed.

  However, when the dispersant described in Patent Document 1 is used, it is possible to produce an ink of a disperse dye alone, but when a water-soluble dye is included, the dispersion system collapses and stability cannot be obtained. Occurs. That is, in an ink containing a water-soluble dye and a disperse dye at the same time, disperse dye particles are likely to become unstable, and thus improvement of stability is an important issue.

  On the other hand, when a general dispersant is used, there is a problem that the dispersed particles cause agglomeration, resulting in poor filtration and sedimentation, and the ink becomes unstable.

As described above, in the prior art, an ink that contains a water-soluble dye and a disperse dye at the same time and has sufficient stability has not been obtained.
JP-A-10-330661

  The present invention has been made in view of the above, and provides an ink-jet aqueous ink containing a water-soluble dye, a disperse dye, and a dispersant for dispersing the disperse dye, and exhibiting excellent stability. With the goal. It is another object of the present invention to provide a method for dyeing a composite fiber product composed of two or more kinds of fibers using this ink.

  The ink-jet ink of the present invention is an ink comprising one or more disperse dyes, one or more water-soluble dyes, and one or more dispersants. In order to solve the above problems, the difference between the inorganic / organic value of the dispersant and the inorganic / organic value of the disperse dye is 0 to 1, and the inorganic / organic property of the dispersant. The difference between the value and the inorganic / organic value of the water-soluble dye is 2 or more.

  In the above ink, the inorganic / organic value of the dispersant is preferably 0.7 to 2.5.

  The method for dyeing a composite fiber product of the present invention comprises a composite fiber product containing one or more fibers that can be dyed with a disperse dye and one or more fibers that can be dyed with a water-soluble dye. On the other hand, it shall dye | stain by providing the above-mentioned inkjet ink of this invention.

  According to the present invention, as described above, the difference between the inorganic / organic value (IOB value) of the disperse dye contained and the inorganic / organic value of the dispersant is 0 to 1, and the water-soluble dye By using a dispersant in which the difference between the inorganic / organic value and the inorganic / organic value of the dispersant is 2 or more, it is possible to provide an inkjet ink having improved ink dispersion stability and continuous ink ejection properties. . Therefore, a product with improved expressive power can be obtained in the dyeing of a composite fiber product composed of two or more kinds of fibers, in particular, the dyeing of a complicated color pattern.

  When the difference between the IOB value of the disperse dye and the IOB value of the dispersant exceeds 1, or when the difference between the IOB value of the dispersant and the IOB value of the water-soluble dye is less than 2, the disperse dye particles aggregate and discharge clogs. Will be caused. This is because the dispersing agent that is adsorbed and stabilized by the disperse dye has affinity for the water-soluble dye side, so that it dissociates from the disperse dye and the disperse dye particles aggregate from the separated part. it is conceivable that. When the difference between the IOB value of the dispersant and the IOB value of the disperse dye is in the range of 0 to 1 and the difference between the IOB value of the water-soluble dye is 2 or more, the dispersion system in which the water-soluble dye and the disperse dye are present Since the dispersant selectively adsorbs to the disperse dye, it is considered that the disperse dye is dispersed and stabilized even in a system in which a water-soluble dye is present, the ink stability is improved, and the ejection property is also stabilized.

The inorganic / organic value (IOB value) in the present invention was calculated based on the method described in Norihiko Kuroki and “Dyeing Theory Chemistry”, pages 66 to 70, published by Tsuji Shoten (Table 3.3 “ Using numerical values of inorganic groups, etc., numerical values were obtained according to “Examples of calculation”). The organic value is 20 for one carbon atom, the inorganic value is 100 for one hydroxyl group, and based on these, organic values such as other substituents and inorganic values are determined. In the present invention, the sulfonic acid group of the dye was calculated as SO ₃ Na. Further, the oxyethylene group was treated specially, and calculation was performed with an inorganic value of 75 and an organic value of 40.

  In the inkjet ink of the present invention, as described above, the difference between the inorganic / organic value of the dispersant and the inorganic / organic value of the disperse dye is set to 0 to 1, and the inorganic / organic property of the dispersant. The difference between the value and the inorganic / organic value of the water-soluble dye is set to 2 or more. Preferably, the difference between the inorganic / organic value of the dispersant and the inorganic / organic value of the disperse dye is set to 0 to 0.9, and the inorganic / organic value of the dispersant and the inorganic property of the water-soluble dye / The difference from the organic value is set to 2.7 or more.

  The chemical structure of the disperse dye used in the present invention is not particularly limited. Examples thereof include heterocyclic azo dyes such as those, anthraquinone dyes, quinophthalone, nitro, coumarin, methine, and aminoketone-based condensed dyes.

  Specific examples of disperse dyes are specifically shown in C.I. I. Disperse Yellow 3, 5, 7, 9, 13, 23, 24, 30, 42, 54, 56, 60, 64, 65, 71, 74, 79, 82, 83, 85, 86, 88, 90, 91 , 93, 98, 99, 100, 102, 105, 114, 119, 122, 124, 134, 135, 141, 143, 149, 160, 163, 169, 170, 172, 183, 186, 192, 211, 232 , 237, 242, etc., C.I. I. Disperse Orange 1, 3, 5, 13, 21, 25, 29, 30, 31, 37, 44, 45, 47, 49, 53, 54, 55, 56, 57, 60, 61, 62, 73, 76 96, 118, 148, etc., C.I. I. Disperse Red 1, 4, 5, 7, 11, 13, 15, 17, 19, 43, 50, 53, 54, 55, 58, 60, 65, 72, 73, 74, 76, 82, 86, 88 , 90, 91, 92, 96, 105, 106, 108, 110, 111, 117, 118, 121, 122, 126, 127, 128, 131, 132, 134, 135, 137, 145, 146, 152, 153 , 166, 167, 167: 1,169,177,179,181,183,184,185,188,189,190,191,192,199,200,201,202,203,205,206,207,210 , 221, 224, 225, 227, 229, 239, 240, 258, 283, 288, 296, 302, 303, 310, 311, 3 23,328,362, etc., C.I. I. Disperse violet 1, 4, 8, 26, 27, 28, 29, 33, 35, 38, 40, 43, 46, 48, 50, 51, 54, 56, 57, 93, etc. I. Disperse Blue 3, 7, 14, 16, 20, 21, 27, 35, 43, 44, 54, 55, 56, 58, 60, 64, 72, 73, 77, 79, 79: 1, 81, 82 83, 87, 91, 93, 94, 95, 96, 102, 106, 108, 113, 115, 118, 128, 130, 139, 142, 143, 146, 148, 149, 153, 154, 158, 165 , 171,179,181,183,185,186,187,190,197,198,200,201,205,207,214,224,225,257,258,266,268,270,281,284,291 , 301, 315, 330, 354, 358 and the like. These disperse dyes may be used individually by 1 type, or may be used in combination of 2 or more type.

  The disperse dye has a strong affinity for polyester fiber or acetate fiber to be dyed, and has an inorganic / organic value of 0.6 to 1.5 so that the dyeing is good. Is preferred. If this value is too high, the affinity for cellulosic fibers or polyamide fibers that are dyed with water-soluble dyes will increase, and contamination of these fibers will increase.

  Next, as the water-soluble dye, any of reactive dyes, acid dyes and direct dyes can be used, but reactive dyes are most preferable.

  The reactive dye is not particularly limited in its chemical structure or reactive group. Examples of the chemical structure include pyrazolone azo, benzene azo, naphthalene azo, pyridone azo, J acid azo, H acid azo, and K acid azo. , Anthraquinone, metal complex monoazo, formazan, phthalocyanine, disazo, azine, dioxazine, and the like. Examples of the reactive group include a vinylsulfone type, a dichlorotriazine type, a monochlorotriazine type, a monofluorotriazine type, a trichloropyrimidine type, and a polyfunctional type such as vinylsulfone + monochlorotriazine type.

  Specific examples of reactive dyes are specifically shown in C.I. I. Reactive Yellow 2, 3, 13, 15, 17, 25, 37, 85, etc., C.I. I. Reactive orange 5, 12, 13, 16, 30, 64, etc., C.I. I. Reactive Red 3: 1, 21, 22, 24, 33, 81, C.I. I. Reactive violet 2, 4, 5 etc., C.I. I. Reactive blue 2, 5, 7, 15, 19, 49, and the like.

  Although any reactive group of the reactive dye can be used, it is preferably a low-reactive group such as a monochlorotriazine group because it is less susceptible to the pH of the aqueous solution and is less likely to react with other drugs. .

  The chemical structure of the acid dye is not particularly limited. Examples include monoazo series such as pyrazolone azo and benzene azo, anthraquinone series such as quinizarin and bromamine, polyazo series, triallylmethane series, xanthene series, nitro series, metal Examples include complex salt type.

  The chemical structure of the direct dye is not particularly limited, and examples thereof include polyazo series, tolidine series, dianisidine azo series, stilbene azo series, thiazole azo series, diaminodiphenylamine azo series, and di-J acid azo series.

  These water-soluble dyes may be used alone or in combination of two or more. When two or more types are used, as long as the requirements of the inorganic / organic values stipulated in the present invention are satisfied, for example, two or more different reactive dyes belonging to the same category may be used. You may use in the combination of what belongs to different classifications, such as dye.

  When the water-soluble dye has an inorganic / organic value close to that of the disperse dye, the disperse dye particles become unstable because the disperse dye is attracted from the disperse dye by increasing the affinity with the disperser. On the other hand, if it is too high, the affinity for water will be high, and the dye that remains unfixed on the dyed cloth will be easily moved by water, causing soaping contamination and poor wet fastness. Therefore, it is preferable to use a water-soluble dye having an inorganic / organic value of 4.0 to 6.7.

  The water-soluble dye may be dissolved in a significant amount in the ink of the present invention, and a part of the water-soluble dye may be dispersed without being dissolved.

  Next, examples of the dispersant used in the present invention include polyoxyethylene alkyl ether, polyoxyethylene alkyl allyl ether, polyoxyethylene polycyclic phenyl ether, and alkylbenzene sulfonate.

  Naphthalene sulfonate Na formalin condensate, lignin sulfonate, etc. are often used to disperse disperse dyes, both of which show a difference in inorganic / organic values of less than 2 with water-soluble dyes, In the ink containing the sexual dye at the same time, it is separated from the disperse dye and the stability is lowered. Therefore, the dispersed particles become unstable, causing aggregation and ejection clogging.

  The dispersant is preferably nonionic or anionic, and may be used in a mixture of nonionic and anionic. When the nonionic dispersant is adsorbed to the particles, the molecular chains of the dispersant are sterically hindered when the particles approach each other, preventing aggregation of the particles. On the other hand, in the case of an anionic dispersant, when adsorbed on the particles, the particle surface becomes charged, charges of the same sign repel each other and prevent aggregation of the particles. In addition, even when they are used as a mixture, steric repulsion due to non-ions and electrical repulsion due to anions occur, and the dispersion state is stabilized.

  The inorganic / organic value of the dispersant is preferably 0.7 to 2.5, and more preferably 0.8 to 2.0. One type of dispersant may be used alone, or a plurality of types of dispersants may be used. However, when any one or two of the above-mentioned disperse dyes, water-soluble dyes, and dispersants are used, or two or more of them are used, the inorganic / The difference in organic value is set to the above-mentioned range. However, it does not depart from the gist of the present invention, and it is within the scope of the present invention even if it contains a small amount of other dyes as long as the effect to be obtained by the present invention is obtained.

  The mixing ratio (weight ratio) of the dispersant for the ink of the present invention is preferably 0.4 to 0.7, assuming that the disperse dye is 1. When the blending ratio of the dispersant is less than 0.4, it cannot be adsorbed to the entire dispersed dye particles present in the water-soluble dye, the dispersed particles exhibit aggregation, and the coarsened particles exhibit sedimentation properties. As a result, the discharge performance is lowered. When the blending ratio exceeds 0.7, the dispersant present without adsorbing to the dispersed particles in the ink precipitates and aggregates, whereby the stability of the ink is lowered. Further, the addition amount of the dispersant in the disperse dye ink is preferably 0.1 to 15% by weight, and more preferably 0.5 to 10% by weight.

  It is preferable to add a solid or liquid wetting agent to the ink of the present invention.

  Examples of solid wetting agents include hydroxypropyl-β-cyclodextrin, trimethylolethane, trimethylolpropane, caprolactam, urea, etc., monosaccharides such as pentose, hexose, polysaccharides such as disaccharides or trisaccharides, or These derivatives include sugar alcohols, reduced derivatives such as deoxy acid, oxidized derivatives such as aldonic acid and uronic acid, dehydrated derivatives of saccharides, amino acids, thiosaccharides, and the like.

  The liquid wetting agent is preferably a high-boiling and low-volatile polyhydric alcohol compound. Examples include ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, triethylene glycol, and polytriethylene glycol. Or (mono or poly) lower such as diethylene glycol (mono or di) methyl ether, triethylene glycol (mono or di) methyl ether, polyethylene glycol (mono or di) methyl ether, dipropylene glycol (mono or di) methyl ether Alkylene glycol (mono or di) alkyl ethers, preferably (mono or poly) lower alkylene glycol (mono or di) lower alkyl ethers S and, 1,3-butanediol, 1,5-pentanediol, glycerol, 1,2,6-hexanetriol, and the like.

  The said wetting agent can be used individually by 1 type or in combination of 2 or more types. The addition amount of these wetting agents is preferably 0.1 to 15% by weight of the disperse dye ink, and more preferably 0.5 to 10% by weight.

  Further, a preservative can be added to the ink of the present invention.

  Preservatives used in the ink include sodium o-phenylphenol, methyl p-hydroxybenzoate, Na-2-pyridinethiol-1-oxide, hexahydro-1,3,5-tris-s-triazine, tetrachloroiso In addition to phthalonitrile and Zn-2-pyridinethiol-1-oxide, 5-chloro-2-methyl-4-isothiazolin-3-one, 2-methyl-4-isothiazolin-3-one, 1,2-benz And isothiazoline-based compounds such as isothiazoline.

  In addition, a pH adjuster, a chelating agent, a thickener, a fluidity improver, an electrical conductivity adjuster, an antioxidant, an ultraviolet absorber, an infrared absorber, an antifoaming agent, etc. may be added as necessary. .

  As a disperser for converting a disperse dye into a disperse ink, various dispersers such as a conventionally known ball mill, sand mill, roll mill, line mill, and sand grinder can be used.

  The average particle size of the disperse dye in the disperse ink is preferably 0.01 to 0.35 μm, and more preferably 0.02 to 0.3 μm.

  A metal element exhibiting a high salting-out power may be present in the ink, but the amount is preferably as small as possible. Examples of the metal element exhibiting high salting-out power include Na, K, Li, Ca, and Mg elements. This is because when these elements are large, water molecules are taken away from the dispersant in the ink, the dispersant cannot be dissolved, precipitation occurs, and the dispersed particles gradually agglomerate, resulting in a decrease in ink physical properties.

  The composite fiber product to which the dyeing method of the present invention is applied is a fabric composed of two or more kinds of fibers, and its structure may be any of woven fabric, knitted fabric, nonwoven fabric, braided string, and the like, and is particularly limited. Although not intended, woven fabrics and knitted fabrics are particularly preferable. In addition, as for materials, polyester materials such as polyethylene terephthalate and polybutylene terephthalate, polyamide materials such as 6 nylon and 66 nylon, cellulose materials such as rayon, cupra, cotton, hemp and lyocell, acetate materials such as diacetate and triacetate Polyurethane materials, wool, silk, and the like. Among them, composite fabrics of polyester materials and cellulose materials, and composite fabrics of polyester materials and polyamide materials are used for a wide range of applications.

  In order to dye the composite fiber product, a dye suitable for the constituting fiber is used. Typical examples include disperse dyes for polyester materials and acetate materials, acid dyes and reactive dyes for polyamide materials, reactive dyes and direct dyes for cellulose materials, and acid dyes and reactive dyes for wool, silk, etc. Can be mentioned. For the above-mentioned preferred composite fabric, a combination of a disperse dye and an acid dye is used for a composite fabric of a polyester material and a cellulose material for a composite fabric of a polyester material and a cellulose material, and for a composite fabric of a polyester material and a polyamide material. Alternatively, a combination of a disperse dye and a reactive dye is a preferable dye combination.

  The dyeing method of the present invention can be performed according to the conventional ink jet dyeing method except that the ink of the present invention described above is used.

  As for the ink jet recording method, on-demand methods such as a charge modulation method, a micro dot method, a charge ejection control method, a continuous method such as an ink mist method, a piezo method, a bubble jet (registered trademark) method, and an electrostatic suction method. Any of them can be adopted.

  After the ink is ejected onto the fabric, the fabric may be dried before the heat treatment described below. Drying conditions are preferably 20 to 60 ° C. and a humidity of 60% or less. In addition, for example, it is preferable to apply wind at a wind speed of 150 to 200 m / min to the fabric.

  The printed fabric is further subjected to heat treatment for the purpose of coloring and fixing the dye, and wet heat treatment is preferably used. The wet heat conditions in this case are determined by the dye used and the fabric material. As a guideline, for example, polyester fiber / cellulosic fiber is about 150-180 ° C., and polyester fiber / polyamide fiber is about 150- The treatment is preferably performed at a temperature of 170 ° C. for about 5 to 30 minutes.

  Thereafter, the fabric after the heat treatment is washed for the purpose of removing unfixed dyes, wetting agents and the like. At that time, not only water at room temperature, but also warm water and hot water, adding detergents, reducing agents, auxiliaries such as alkaline substances, and using mechanical frying together, further cleaning performance Improvement can be expected.

  EXAMPLES Hereinafter, although the Example of this invention is given with a comparative example and this invention is demonstrated in more detail, this invention is not limited by a following example. In the examples and comparative examples, “%” represents “% by weight”.

[Example 1]
(Disperse dye ink)
A liquid mixture having the following composition was wet-pulverized with a sand mill for 10 hours in the presence of glass beads to form fine particles, and then the glass beads were removed by suction filtration to prepare an ink-jet disperse dye ink.

CI Disperse Yellow114 (IOB = 1.24) 3.0 wt%
Diethylene glycol 5.0% by weight
Dispersant 1 (IOB = 1.70) 2.0% by weight
Sun Eye Back IT20 (Anti-preservative, Sanai Oil Co., Ltd.) 0.1% by weight
Pure water remaining

(Reactive dye ink)
Each component was mixed and stirred at the blending ratio shown above, and then filtered to prepare an inkjet reactive dye ink.

CI Reactive Yellow2 (IOB = 4.70) 10.0% by weight
Diethylene glycol dimethyl ether 2.0% by weight
Sun Eye Back IT20 0.1% by weight
Pure water remaining

  The reactive dye ink and disperse dye ink prepared above were blended at a ratio of 1: 1, stirred at room temperature for 1 hour, and then filtered to prepare an inkjet ink.

[Example 2]
An inkjet ink was prepared in the same manner as in Example 1 except that the following formulation was used.

(Disperse dye ink)
CI Disperse Blue165 (IOB = 0.93) 3.0 wt%
Diethylene glycol 5.0% by weight
Dispersant 2 (IOB = 0.97) 1.5% by weight
Sun Eye Back IT20 0.1% by weight
Pure water remaining

(Reactive dye ink)
CI Reactive Blue49 (IOB = 4.40) 10.0% by weight
Diethylene glycol dimethyl ether 2.0% by weight
Sun Eye Back IT20 0.1% by weight
Pure water remaining

[Example 3]
An inkjet ink was prepared in the same manner as in Example 1 except that the following formulation was used.

(Disperse dye ink)
CI Disperse Red167: 1 (IOB = 0.93) 2.5 wt%
Diethylene glycol 5.0% by weight
Dispersant 3 (IOB = 1.00) 1.5% by weight
Sun Eye Back IT20 0.1% by weight
Pure water remaining

(Reactive dye ink)
CI Reactive Red24 (IOB = 5.10) 10.0% by weight
Urea 3.0% by weight
Sun Eye Back IT20 0.1% by weight
Pure water remaining

[Example 4]
An inkjet ink was prepared in the same manner as in Example 1 except that the following formulation was used.

(Disperse dye ink)
CI Disperse Yellow114 (IOB = 1.24) 3.0 wt%
Diethylene glycol 5.0% by weight
Dispersant 4 (IOB = 1.85) 2.0% by weight
Sun Eye Back IT20 0.1% by weight
Pure water remaining

(Reactive dye ink)
CI Reactive Yellow13 (IOB = 5.60) 10.0% by weight
Urea 3.0% by weight
Sun Eye Back IT20 0.1% by weight
Pure water remaining

[Example 5]
An inkjet ink was prepared in the same manner as in Example 1 except that the following formulation was used.

(Disperse dye ink)
CI Disperse Blue165 (IOB = 0.93) 3.0 wt%
Diethylene glycol 5.0% by weight
Dispersant 5 (IOB = 1.10) 1.8% by weight
Sun Eye Back IT20 0.1% by weight
Pure water remaining

(Reactive dye ink)
CI Reactive Blue19 (IOB = 4.20) 40.0% by weight
Urea 3.0% by weight
Sun Eye Back IT20 0.1% by weight
Pure water remaining

[Comparative Example 1]
An inkjet ink was prepared in the same manner as in Example 1 except that the following formulation was used.

(Disperse dye ink)
CI Disperse Blue165 (IOB = 0.93) 3.0 wt%
Diethylene glycol 5.0% by weight
Dispersant 6 (IOB = 3.70) 3.0% by weight
Sun Eye Back IT20 0.1% by weight
Pure water remaining

(Reactive dye ink)
CI Reactive Blue49 (IOB = 4.40) 10.0% by weight
Diethylene glycol dimethyl ether 2.0% by weight
Sun Eye Back IT20 0.1% by weight
Pure water remaining

[Comparative Example 2]
An inkjet ink was prepared in the same manner as in Example 1 except that the following formulation was used.

(Disperse dye ink)
CI Disperse Yellow114 (IOB = 1.24) 3.0 wt%
Diethylene glycol 5.0% by weight
Dispersant 7 (IOB = 5.50) 3.0% by weight
Sun Eye Back IT20 0.1% by weight
Pure water remaining

(Reactive dye ink)
.I. Reactive Yellow13 (IOB = 5.60) 10.0% by weight
Ethylene glycol dimethyl ether 2.0% by weight
Nyeback IT20 0.1% by weight
Pure water remaining

[Comparative Example 3]
An inkjet ink was prepared in the same manner as in Example 1 except that the following formulation was used.

(Disperse dye ink)
CI Disperse Red167: 1 (IOB = 0.93) 2.5% by weight
Diethylene glycol 5.0% by weight
Dispersant 8 (IOB = 5.48) 3.0% by weight
Sun Eye Back IT20 0.1% by weight
Pure water remaining

(Reactive dye ink)
CI Reactive Red22 (IOB = 4.30) 40.0% by weight
Diethylene glycol dimethyl ether 2.0% by weight
Sun Eye Back IT20 0.1% by weight
Pure water remaining

[Comparative Example 4]
An inkjet ink was prepared in the same manner as in Example 1 except that the following formulation was used.

(Disperse dye ink)
CI Disperse Blue60 (IOB = 1.49) 3.0 wt%
Diethylene glycol 5.0% by weight
Dispersant 9 (IOB = 1.10) 2.0% by weight
Sun Eye Back IT20 0.1% by weight
Pure water remaining

(Reactive dye ink)
CI Reactive Blue15 (IOB = 2.40) 10.0% by weight
Urea 3.0% by weight
Sun Eye Back IT20 0.2% by weight
Pure water remaining

[Comparative Example 5]
An inkjet ink was prepared in the same manner as in Example 1 except that the following formulation was used.

(Disperse dye ink)
CI Disperse Red167: 1 (IOB = 0.93) 2.5 wt%
Diethylene glycol 5.0% by weight
Dispersant 10 (IOB = 2.40) 2.0% by weight
Sun Eye Back IT20 0.1% by weight
Pure water remaining

(Reactive dye ink)
CI Reactive Red24 (IOB = 5.10) 10.0% by weight
Urea 3.0% by weight
Sun Eye Back IT20 0.1% by weight
Pure water remaining amount Table 1 shows the dye CI No., inorganic / organic value, reactive dye reactive group, dispersant ionicity, disperse dye and dispersant content for the dye inks of the above Examples and Comparative Examples. Show.

  Each ink dye was evaluated for ink stability and continuous ejection. The results are shown in Table 2.

[Ink stability]
Each ink was allowed to stand at room temperature for 30 days, and the ink physical properties were measured and evaluated according to the following contents.

<Sedimentation>
The ink was placed in a 100 ml graduated cylinder and allowed to stand at room temperature for 24 hours, and the density ratio of the upper and lower parts was calculated as (lower density / upper density) × 100% of the ink in the cylinder. The ink concentration was measured by the absorbance at the peak wavelength of the ink using an ultraviolet-visible spectrophotometer UV-1700 (manufactured by Shimadzu Corporation).

<Filterability (aggregate)>
300 g of ink was added to ADVANTEC high purity filter paper No. Using 5A, suction filtration was performed, and after the entire amount of ink was filtered, the presence or absence of a residue on the filter paper was visually determined according to the following criteria.
○: No residue △: There is residue and can be filtered ×: Cannot be filtered

<Granularity>
The particle size (average particle size) was measured using Microtrac UPA.

[Continuous discharge]
The prepared ink was continuously discharged under the following conditions to evaluate nozzle clogging and flying state.

Discharge device: On-demand type serial scanning recording device Drive voltage: 150V
Pulse width: 10μs
Nozzle diameter: 50 μm
Frequency: 5kHz
Printing time: 60 min

  A total of 100 nozzles were used, and the number of clogged nozzles and the number of nozzles with poor flight status were measured.

Claims (3)

An ink comprising one or more disperse dyes, one or two or more water-soluble dyes, and one or more dispersants,
The difference between the inorganic / organic value of the dispersant and the inorganic / organic value of the disperse dye is 0 to 1, and the inorganic / organic value of the dispersant and the inorganic / organic of the water-soluble dye An ink-jet ink, wherein the difference from the property value is 2 or more.   The inkjet ink according to claim 1, wherein the dispersant has an inorganic / organic value of 0.7 to 2.5.   The composite fiber product containing one or more kinds of fibers dyeable with a disperse dye and one or more kinds of fibers dyeable with a water-soluble dye, according to claim 1 or 2. A method for dyeing a composite fiber product, characterized by dyeing ink jet ink.