JP2023011121A - Ink for inkjet ink, method for manufacturing printed matter, and apparatus for manufacturing printed matter - Google Patents

Abstract

To provide ink for inkjet which enables formation of an image having excellent scratch resistance against various recording media while securing an appropriate viscosity region of ink.SOLUTION: Ink for inkjet contains water, an organic solvent, a resin and reactive oil.SELECTED DRAWING: None

Description

The present invention relates to an inkjet ink, a method for producing printed matter, and an apparatus for producing printed matter.

In recent years, inkjet printers have been used not only for home use, but also for industrial use such as cloth, plastic film, wallpaper, and window film.

Attempts have been made to improve the scratch resistance of ink coatings on a wide range of media when ink coatings are often formed using water-based inks.
For example, a printing step of forming a printing layer on a substrate by a waterless lithographic printing method using an aqueous ink composition, a coating step of applying an ultraviolet curable varnish composition on the printing layer, and coating on the printing layer and an ultraviolet irradiation step of curing the UV-curable varnish composition to form an overcoat layer (see, for example, Patent Document 1).

An object of the present invention is to provide an inkjet ink capable of forming an image having excellent scratch resistance on various recording media while ensuring an appropriate viscosity range of the ink.

The inkjet ink of the present invention as a means for solving the above problems contains water, an organic solvent, a resin, and a reactive oil.

According to the present invention, it is possible to provide an inkjet ink capable of forming an image having excellent scratch resistance on various recording media while ensuring an appropriate ink viscosity range.

FIG. 1 is a perspective explanatory view showing an example of the printed matter manufacturing apparatus of the present invention. FIG. 2 is a perspective explanatory view showing an example of the main tank in the printed matter manufacturing apparatus of the present invention.

(Inkjet ink)
The inkjet ink of the present invention contains water, an organic solvent, a resin, and a reactive oil, and optionally other components.

In the prior art, a varnish made of an ultraviolet curable material is used, and there is a problem that it is difficult to dry the varnish by the drying method (thermal drying) of water-based inkjet printing. In addition, since the conventional technology is offset printing, there is a problem that it is not guaranteed whether the ink ejection property (ink viscosity, particle size) peculiar to inkjet printing can be achieved.
The inkjet ink of the present invention can solve the above problems. Furthermore, according to the present invention, the coating film can be formed by combining the printing process and the coating process after drying the coating film.

<Reactive oil>
The reactive oil preferably has an iodine value of 130 or more as measured according to JIS K 0070-1992 and is a drying oil that solidifies by oxidative polymerization. The iodine value is an index representing the amount of unsaturated fatty acids in the reaction oil. When the reactive oil is such a drying oil, the scratch resistance of the formed image can be improved. The iodine value is preferably 130 or more, more preferably 130 or more and less than 240. When the iodine value is 130 or more, curing of the ink coating film can be accelerated, and scratch resistance can be improved.
The iodine value can be measured according to JIS K 0070-1992. Another method for measuring the iodine value is the Wiis-cyclohexane method.
The method for measuring the iodine value by the Wiis-cyclohexane method is performed as follows.
First, the inkjet ink is centrifugally filtered by a centrifugal separator (Optima MAX-XP, 150,000 rpm, 0.5 hr). The amount of halogen that reacts with 100 g of the ink (sample) obtained by centrifugal filtration is converted to the number of grams of iodine, and the reactive oil in the ink is measured by measuring the number of carbon-carbon double bonds contained in the sample. The iodine value of can be measured.

The reactive oil is not particularly limited as long as it has an iodine value of 130 or more, and can be appropriately selected according to the purpose. , iodine value: 132), grape seed oil (product name: grape seed oil, manufactured by FUJIFILM Wako Pure Chemical Industries, Ltd., iodine value: 135), sunflower seed oil (product name: sunflower seed oil, FUJIFILM Wako Pure Chemical Industries, Ltd. Co., Ltd., iodine value: 137), linseed oil (linseed oil, manufactured by Nacalai Tesque Co., Ltd., iodine value: 190), poppy oil (product name: poppy oil, manufactured by Holbein Painting Materials Co., Ltd., iodine value: 132), tung oil (Product name: Tung oil, manufactured by Yoneyama Pharmaceutical Co., Ltd., iodine value: 232), walnut oil (product name: domestic walnut oil, manufactured by Yamanaka Yuten, iodine value: 147), perilla oil (product name: domestic perilla oil, manufactured by Yamanaka Yuten, iodine value: 215). These may be used individually by 1 type, and may use 2 or more types together.

The content of the reactive oil is preferably 0.05% by mass or more, more preferably 0.05% by mass or more and 10% by mass or less, relative to the total amount of the ink. When the content of the reactive oil is 0.05% by mass or more, the image (coating film) can be easily cured.

<Organic solvent>
The organic solvent used in the present invention is not particularly limited, and any water-soluble organic solvent can be used. Examples thereof include polyhydric alcohols, ethers such as polyhydric alcohol alkyl ethers and polyhydric alcohol aryl ethers, nitrogen-containing heterocyclic compounds, amides, amines, and sulfur-containing compounds.
Examples of water-soluble organic solvents include ethylene glycol, diethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2 , 3-butanediol, 3-methyl-1,3-butanediol, triethylene glycol, polyethylene glycol, polypropylene glycol, 1,2-pentanediol, 1,3-pentanediol, 1,4-pentanediol, 2, 4-pentanediol, 1,5-pentanediol, 1,2-hexanediol, 1,6-hexanediol, 1,3-hexanediol, 2,5-hexanediol, 1,5-hexanediol, glycerin, 1 , 2,6-hexanetriol, 2-ethyl-1,3-hexanediol, ethyl-1,2,4-butanetriol, 1,2,3-butanetriol, 2,2,4-trimethyl-1,3 - Polyhydric alcohols such as pentanediol and petriol, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, tetraethylene glycol monomethyl ether, propylene glycol monoethyl ether, etc. Polyhydric alcohol alkyl ethers, polyhydric alcohol aryl ethers such as ethylene glycol monophenyl ether and ethylene glycol monobenzyl ether, 2-pyrrolidone, N-methyl-2-pyrrolidone, N-hydroxyethyl-2-pyrrolidone, 1, Nitrogen-containing heterocyclic compounds such as 3-dimethyl-2-imidazolidinone, ε-caprolactam, γ-butyrolactone, formamide, N-methylformamide, N,N-dimethylformamide, 3-methoxy-N,N-dimethylpropionamide , 3-butoxy-N,N-dimethylpropionamide and other amides, monoethanolamine, diethanolamine, triethylamine and other amines, dimethylsulfoxide, sulfolane, thiodiethanol and other sulfur-containing compounds, propylene carbonate, ethylene carbonate, and the like. be done.
It is preferable to use an organic solvent having a boiling point of 250° C. or less because it not only functions as a wetting agent but also provides good drying properties.

Polyol compounds having 8 or more carbon atoms and glycol ether compounds are also preferably used.
Specific examples of polyol compounds having 8 or more carbon atoms include 2-ethyl-1,3-hexanediol and 2,2,4-trimethyl-1,3-pentanediol.
Specific examples of glycol ether compounds include polyhydric alcohol alkyls such as ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, tetraethylene glycol monomethyl ether, and propylene glycol monoethyl ether. Ethers; polyhydric alcohol aryl ethers such as ethylene glycol monophenyl ether, ethylene glycol monobenzyl ether, and the like. These may be used individually by 1 type, and may use 2 or more types together.

The content of the organic solvent is preferably 5% by mass or more and 40% by mass or less, more preferably 5% by mass or more and 30% by mass or less, relative to the total amount of the ink. When the content of the organic solvent is 5% by mass or more, the moisture retaining property of the ink can be improved, and thus the ejection stability can be improved. Further, when the content of the organic solvent is 40% by mass or less, the drying property of the image (coating film) can be improved when forming the image (coating film). Abrasion resistance can be improved.

<Resin>
The type of resin contained in the ink is not particularly limited and can be appropriately selected according to the purpose. Examples include butadiene-based resins, vinyl chloride-based resins, acrylic-styrene-based resins, and acrylic-silicone-based resins.
Resin particles made of these resins may also be used. Ink can be obtained by mixing resin particles in a resin emulsion state in which water is dispersed as a dispersion medium with a material such as a coloring material or an organic solvent. As the resin particles, appropriately synthesized ones may be used, or commercially available products may be used. These may be used singly or in combination of two or more resin particles. Among these, at least one of acrylic resin particles and polyurethane resin particles is preferable.

The volume average particle diameter of the resin particles is not particularly limited and can be appropriately selected according to the intended purpose. 200 nm or less is more preferable, and 10 nm or more and 100 nm or less is particularly preferable.
The volume average particle diameter can be measured, for example, using a particle size analyzer (Nanotrack Wave-UT151, manufactured by Microtrack Bell Co., Ltd.).

The content of the resin is not particularly limited and can be appropriately selected according to the purpose. However, from the viewpoint of fixability and storage stability of the ink, the content is 1% by mass or more and 30% by mass or less based on the total amount of the ink. is preferable, and 5% by mass or more and 20% by mass or less is more preferable.

The particle size of the solid content in the ink is not particularly limited and can be appropriately selected according to the purpose. is preferably 20 nm or more and 1000 nm or less, more preferably 20 nm or more and 150 nm or less.
The solid content includes resin particles, pigment particles, thickener polymer particles, and the like. The particle size can be measured using a particle size analyzer (Nanotrack Wave-UT151, manufactured by Microtrack Bell Co., Ltd.).

<Water>
The water is not particularly limited and can be appropriately selected according to the purpose. Examples thereof include pure water such as ion-exchanged water, ultrafiltrated water, reverse osmosis water, distilled water, and ultrapure water. . The content of water in the ink is not particularly limited and can be appropriately selected according to the purpose. % or more and 60 mass % or less is more preferable.

<Other ingredients>
The other components are not particularly limited and can be appropriately selected depending on the intended purpose. be done.

<<coloring material>>
The coloring material is not particularly limited, and pigments and dyes can be used.
An inorganic pigment or an organic pigment can be used as the pigment. These may be used individually by 1 type, and may use 2 or more types together. Mixed crystals may also be used.
Examples of pigments that can be used include black pigments, yellow pigments, magenta pigments, cyan pigments, white pigments, green pigments, orange pigments, glossy color pigments such as gold and silver, and metallic pigments.
As inorganic pigments, in addition to titanium oxide, iron oxide, calcium carbonate, barium sulfate, aluminum hydroxide, barium yellow, cadmium red, and chrome yellow, carbon black produced by known methods such as contact method, furnace method, thermal method, etc. can be used.
Organic pigments include azo pigments, polycyclic pigments (e.g., phthalocyanine pigments, perylene pigments, perinone pigments, anthraquinone pigments, quinacridone pigments, dioxazine pigments, indigo pigments, thioindigo pigments, isoindolinone pigments, quinoflurone pigments, etc.). , dye chelates (eg, basic dye chelates, acid dye chelates, etc.), nitro pigments, nitroso pigments, aniline black, and the like. Among these pigments, those having good affinity with the solvent are preferably used. In addition, resin hollow particles and inorganic hollow particles can also be used.
Specific examples of pigments for black include carbon blacks (C.I. Pigment Black 7) such as furnace black, lamp black, acetylene black and channel black, or copper and iron (C.I. Pigment Black 11). , metals such as titanium oxide, and organic pigments such as aniline black (C.I. Pigment Black 1).
Further, for color, C.I. I. Pigment yellow 1, 3, 12, 13, 14, 17, 24, 34, 35, 37, 42 (yellow iron oxide), 53, 55, 74, 81, 83, 95, 97, 98, 100, 101, 104 , 108, 109, 110, 117, 120, 138, 150, 153, 155, 180, 185, 213, C.I. I. Pigment Orange 5, 13, 16, 17, 36, 43, 51, C.I. I. Pigment Red 1, 2, 3, 5, 17, 22, 23, 31, 38, 48:2 (Permanent Red 2B (Ca)), 48:3, 48:4, 49:1, 52:2, 53: 1, 57:1 (brilliant carmine 6B), 60:1, 63:1, 63:2, 64:1, 81, 83, 88, 101 (red red), 104, 105, 106, 108 (cadmium red), 112, 114, 122 (quinacridone magenta), 123, 146, 149, 166, 168, 170, 172, 177, 178, 179, 184, 185, 190, 193, 202, 207, 208, 209, 213, 219, 224, 254, 264, C.I. I. Pigment Violet 1 (rhodamine lake), 3, 5:1, 16, 19, 23, 38, C.I. I. Pigment Blue 1, 2, 15 (phthalocyanine blue), 15:1, 15:2, 15:3, 15:4 (phthalocyanine blue), 16, 17:1, 56, 60, 63, C.I. I. Pigment Green 1, 4, 7, 8, 10, 17, 18, 36 and the like.

As dyes, acid dyes, direct dyes, reactive dyes, and basic dyes can be used without particular limitation, and may be used singly or in combination of two or more.
Examples of the dye include C.I. I. Acid Yellow 17, 23, 42, 44, 79, 142, C.I. I. Acid Red 52, 80, 82, 249, 254, 289, C.I. I. Acid Blue 9,45,249, C.I. I. Acid Black 1, 2, 24, 94, C.I. I. Food Black 1, 2, C.I. I. Direct Yellow 1, 12, 24, 33, 50, 55, 58, 86, 132, 142, 144, 173, C.I. I. Direct Red 1, 4, 9, 80, 81, 225, 227, C.I. I. Direct Blue 1, 2, 15, 71, 86, 87, 98, 165, 199, 202, C.I. I. Directed Black 19, 38, 51, 71, 154, 168, 171, 195, C.I. I. Reactive Red 14, 32, 55, 79, 249, C.I. I. Reactive Black 3, 4, 35 and the like.

The content of the coloring material in the ink is preferably 0.1% by mass or more and 15% by mass or less, more preferably 1% by mass or more and 10% by mass or less, from the viewpoints of improving image density, good fixability and ejection stability. preferable.

In order to disperse the pigment in the ink, a method of introducing a hydrophilic functional group into the pigment to make it a self-dispersing pigment, a method of coating the surface of the pigment with a resin and dispersing it, a method of dispersing using a dispersant, etc.
As a method of making a self-dispersing pigment by introducing a hydrophilic functional group into a pigment, for example, a self-dispersing pigment that is dispersible in water by adding a functional group such as a sulfone group or a carboxyl group to a pigment (for example, carbon). etc. can be used.
As a method for dispersing the pigment by coating the surface of the pigment with a resin, a method in which the pigment is encapsulated in microcapsules and dispersible in water can be used. This can be rephrased as a resin-coated pigment. In this case, all the pigments mixed in the ink need not be coated with a resin, and uncoated pigments or partially coated pigments may be dispersed in the ink as long as the effects of the present invention are not impaired. may be
Examples of the method of dispersing using a dispersant include a method of dispersing using a known low-molecular-weight dispersant and high-molecular-weight dispersant typified by surfactants.
As the dispersant, it is possible to use, for example, anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, etc. depending on the pigment.
RT-100 (nonionic surfactant) manufactured by Takemoto Oil & Fat Co., Ltd. and sodium naphthalenesulfonate formalin condensate can also be suitably used as a dispersant.
A dispersing agent may be used individually by 1 type, or may use 2 or more types together.

-Pigment Dispersion-
Inks can be obtained by mixing materials such as water and organic solvents with pigments. Ink can also be produced by mixing a pigment, water, a dispersant, and the like to form a pigment dispersion, and then mixing materials such as water and an organic solvent.
The pigment dispersion is obtained by mixing and dispersing water, a pigment, a pigment dispersant, and optionally other components, and adjusting the particle size. Dispersion should be carried out using a disperser.
The particle diameter of the pigment in the pigment dispersion is not particularly limited, but the dispersion stability of the pigment is improved, and the image quality such as ejection stability and image density is improved. 500 nm or less is preferable, and 20 nm or more and 150 nm or less is more preferable. The particle size of the pigment can be measured using a particle size analyzer (Nanotrack Wave-UT151, manufactured by Microtrack Bell Co., Ltd.).
The content of the pigment in the pigment dispersion is not particularly limited and can be appropriately selected according to the purpose. % or more and 50 mass % or less is preferable, and 0.1 mass % or more and 30 mass % or less is more preferable.
The pigment dispersion is preferably degassed by filtering coarse particles with a filter, a centrifugal separator, or the like, if necessary.

[Preparation of pigment dispersion]
In order to disperse the pigment and obtain an ink, there are a method of introducing a hydrophilic functional group into the pigment to make it a self-dispersing pigment, a method of coating the surface of the pigment with a resin for dispersion, and a method of dispersing using a dispersant. method, etc.

-Self-dispersing pigment-
As a method of making a self-dispersing pigment by introducing a hydrophilic functional group into a pigment, for example, a method of adding a functional group such as a sulfone group or a carboxyl group to a pigment (for example, carbon) to make it dispersible in water. is mentioned.

-Resin coated pigment-
As a method of coating the surface of a pigment with a resin and dispersing it, there is a method of encapsulating the pigment in microcapsules to make it dispersible in water. This can be rephrased as a resin-coated pigment. In this case, all the pigments mixed in the ink need not be coated with a resin, and uncoated pigments or partially coated pigments may be dispersed in the ink as long as the effects of the present invention are not impaired. may be

<<Surfactant>>
Any of silicone surfactants, fluorine surfactants, amphoteric surfactants, nonionic surfactants, and anionic surfactants can be used as surfactants.
The silicone-based surfactant is not particularly limited and can be appropriately selected depending on the purpose. Among them, those that do not decompose even at high pH are preferable. Those having an oxyethylene group or a polyoxyethylene polyoxypropylene group are particularly preferred because they exhibit good properties as water-based surfactants. As the silicone-based surfactant, a polyether-modified silicone-based surfactant can also be used, and examples thereof include compounds in which a polyalkylene oxide structure is introduced into the side chain of the Si portion of dimethylsiloxane.
Examples of fluorine-based surfactants include perfluoroalkylsulfonic acid compounds, perfluoroalkylcarboxylic acid compounds, perfluoroalkylphosphoric acid ester compounds, perfluoroalkylethylene oxide adducts, and perfluoroalkyl ether groups in side chains. Polyoxyalkylene ether polymer compounds are particularly preferred due to their low foaming properties. Examples of the perfluoroalkylsulfonic acid compound include perfluoroalkylsulfonic acid and perfluoroalkylsulfonate. Examples of the perfluoroalkylcarboxylic acid compounds include perfluoroalkylcarboxylic acids and perfluoroalkylcarboxylic acid salts. As the polyoxyalkylene ether polymer compound having a perfluoroalkyl ether group in a side chain, a sulfate ester salt of a polyoxyalkylene ether polymer having a perfluoroalkyl ether group in a side chain, and a perfluoroalkyl ether group in a side chain Examples thereof include salts of polyoxyalkylene ether polymers. Counter ions of salts in these _{fluorosurfactants} include Li, Na, K, _NH4 , _NH3CH2CH2OH , _{NH2 ( CH2CH2OH} ) ₂ , and _{NH ( CH2CH2OH} ). ₃ and the like.
Examples of amphoteric surfactants include laurylaminopropionate, lauryldimethylbetaine, stearyldimethylbetaine, lauryldihydroxyethylbetaine and the like.
Nonionic surfactants include, for example, polyoxyethylene alkylphenyl ethers, polyoxyethylene alkyl esters, polyoxyethylene alkylamines, polyoxyethylene alkylamides, polyoxyethylene propylene block polymers, sorbitan fatty acid esters, polyoxyethylene sorbitan Examples include fatty acid esters and ethylene oxide adducts of acetylene alcohol.
Examples of anionic surfactants include polyoxyethylene alkyl ether acetate, dodecylbenzene sulfonate, laurate, polyoxyethylene alkyl ether sulfate and the like.
These may be used individually by 1 type, or may use 2 or more types together.

The silicone-based surfactant is not particularly limited and can be appropriately selected depending on the intended purpose. Examples include polydimethylsiloxane modified at both chain ends, and polyether-modified silicone-based surfactants having polyoxyethylene groups or polyoxyethylene-polyoxypropylene groups as modifying groups exhibit excellent properties as water-based surfactants. preferable.
As such a surfactant, an appropriately synthesized one may be used, or a commercially available product may be used. Commercially available products are available from, for example, BYK Chemie Co., Ltd., Shin-Etsu Chemical Co., Ltd., Dow Corning Toray Silicone Co., Ltd., Nihon Emulsion Co., Ltd., Kyoeisha Chemical Co., Ltd., and the like.
The above polyether-modified silicone-based surfactant is not particularly limited and can be appropriately selected according to the purpose. For example, a polyalkylene oxide structure represented by the following general formula (S-1) Examples include those introduced into the side chain of the Si portion of dimethylpolysiloxane.

（但し、一般式（Ｓ－１）式中、ｍ、ｎ、ａ、及びｂは、それぞれ独立に、整数を表し、Ｒは、アルキレン基を表し、Ｒ’は、アルキル基を表す。）

(However, in general formula (S-1), m, n, a, and b each independently represent an integer, R represents an alkylene group, and R' represents an alkyl group.)

Commercially available products can be used as the above polyether-modified silicone-based surfactants. -1906EX (manufactured by Nippon Emulsion Co., Ltd.), FZ-2105, FZ-2118, FZ-2154, FZ-2161, FZ-2162, FZ-2163, FZ-2164 (manufactured by Dow Corning Toray Silicone Co., Ltd.), BYK -33, BYK-387 (manufactured by BYK-Chemie Co., Ltd.), TSF4440, TSF4452, TSF4453 (manufactured by Toshiba Silicon Co., Ltd.) and the like.

As the fluorosurfactant, a fluorine-substituted compound having 2 to 16 carbon atoms is preferable, and a fluorine-substituted compound having 4 to 16 carbon atoms is more preferable.
Examples of fluorine-based surfactants include perfluoroalkyl phosphate ester compounds, perfluoroalkyl ethylene oxide adducts, and polyoxyalkylene ether polymer compounds having perfluoroalkyl ether groups in side chains.
Among these, a polyoxyalkylene ether polymer compound having a perfluoroalkyl ether group in a side chain is preferable because of its low foamability, and is represented by either the following general formula (F-1) or general formula (F-2). fluorosurfactants are particularly preferred.

上記一般式（Ｆ－１）で表される化合物において、水溶性を付与するためにｍは０～１０の整数が好ましく、ｎは０～４０の整数が好ましい。

In the compound represented by the general formula (F-1), m is preferably an integer of 0 to 10 and n is preferably an integer of 0 to 40 in order to impart water solubility.

[General formula (F-2)]
_{CnF2n +} -CH2CH(OH) _{CH2 -} O-( _CH2CH2O ) _{a -} Y
In the compound represented by the general formula (F-2), Y is H, or C _m F _2m+1 and m is an integer of 1 to 6, or CH ₂ CH(OH)CH ₂ —C _m F _2m+1 and m is an integer from 4 to 6, or C _p H _2P+1 where p is an integer from 1 to 19; n is an integer of 1-6. a is an integer from 4 to 14;
Commercially available products may be used as the fluorosurfactant.

Examples of commercially available products include Surflon S-111, S-112, S-113, S-121, S-131, S-132, S-141, and S-145 (all manufactured by Asahi Glass Co., Ltd.); Fleurard FC-93, FC-95, FC-98, FC-129, FC-135, FC-170C, FC-430, FC-431 (both manufactured by Sumitomo 3M); Megafac F-470, F -1405, F-474 (both manufactured by DIC Corporation); Zonyl TBS, FSP, FSA, FSN-100, FSN, FSO-100, FSO, FS-300, UR, Capstone FS-30, FS-31, FS-3100, FS-34, FS-35 (all manufactured by Chemours); FT-110, FT-250, FT-251, FT-400S, FT-150, FT-400SW (all , manufactured by Neos Co., Ltd.), Polyfox PF-136A, PF-156A, PF-151N, PF-154, PF-159 (manufactured by Omnova), Unidyne DSN-403N (manufactured by Daikin Industries, Ltd.), etc. Among these, FS-3100, FS-34, FS-300 manufactured by Chemours, and Neos Co., Ltd. are excellent in terms of remarkably improving good print quality, particularly color development, permeability to paper, wettability, and level dyeing. FT-110, FT-250, FT-251, FT-400S, FT-150, FT-400SW manufactured by Omnova, Polyfox PF-151N manufactured by Omnova, and Unidyne DSN-403N manufactured by Daikin Industries, Ltd. are particularly preferred. .

The content of the surfactant in the ink is not particularly limited and can be appropriately selected according to the purpose. % or more and 5 mass % or less is preferable, and 0.05 mass % or more and 5 mass % or less is more preferable.

<< Defoamer >>
The antifoaming agent is not particularly limited, and examples thereof include silicone antifoaming agents, polyether antifoaming agents, and fatty acid ester antifoaming agents. These may be used individually by 1 type, or may use 2 or more types together. Among these, silicone-based antifoaming agents are preferred because of their excellent foam breaking effect.

<< Antiseptic antifungal agent >>
The antiseptic and antifungal agent is not particularly limited, and examples thereof include 1,2-benzisothiazolin-3-one.

<<Antirust agent>>
The rust inhibitor is not particularly limited, and examples thereof include acidic sulfites and sodium thiosulfate.

<<pH adjuster>>
The pH adjuster is not particularly limited as long as it can adjust the pH to 7 or higher, and examples thereof include amines such as diethanolamine and triethanolamine.

The physical properties of the ink are not particularly limited and can be appropriately selected depending on the intended purpose. For example, viscosity, surface tension, pH and the like are preferably within the following ranges.
The viscosity of the ink at 25° C. is preferably 6 mPa·s or more and 13 mPa·s or less from the viewpoint of improving print density and character quality and obtaining good ejection properties. When the ink viscosity at 25° C. is 6 mPa·s or more and 13 mPa·s or less, the print density and image quality are improved, and good ejection properties are obtained. Here, the viscosity can be measured using, for example, a rotational viscometer (RE-80L manufactured by Toki Sangyo Co., Ltd.). Measurement conditions are 25° C., standard cone rotor (1°34′×R24), sample liquid volume 1.2 mL, rotation speed 50 rpm, 3 minutes.
The surface tension of the ink is preferably 35 mN/m or less, more preferably 32 mN/m or less at 25° C., from the viewpoint that the ink is appropriately leveled on the recording medium and the drying time of the ink is shortened.
The pH of the ink is preferably from 7 to 12, more preferably from 8 to 11, from the viewpoint of preventing corrosion of metal members in contact with the liquid.

<Recording medium>
The recording medium is not particularly limited, and plain paper, glossy paper, special paper, cloth, and the like can be used.
The non-permeable substrate is a substrate having a surface with low water permeability and low absorbency, and includes materials that do not open to the outside even if there are many cavities inside. , refers to a substrate having a water absorption of 10 mL/m ² or less from the start of contact to 30 msec ^1/2 in the Bristow method.
As the impermeable substrate, for example, plastic films such as vinyl chloride resin films, polyethylene terephthalate (PET) films, polypropylene, polyethylene and polycarbonate films can be suitably used.
In addition, it is not limited to those used as general recording media, and wallpaper, floor materials, building materials such as tiles, cloth for clothing such as T-shirts, textiles, leather, etc. can be used as appropriate. Ceramics, glass, metal, etc. can also be used by adjusting the configuration of the path for conveying the recording medium.

(printed matter)
The printed material of the present invention has a recording medium and an ink layer containing the solid content of the ink of the present invention on the recording medium.
The solid content in the ink includes resin particles, pigment particles, polymer particles of a thickener, and the like.
The printed material of the present invention has an image formed on a recording medium using the ink of the present invention.
A printed matter can be obtained by printing with a printing apparatus and a printing method.

(Printed Matter Manufacturing Method and Printed Matter Manufacturing Apparatus)
The method for producing a printed matter of the present invention includes an ejection step of ejecting an inkjet ink containing water, an organic solvent, a resin, and a reactive oil, and further includes other steps as necessary.
An apparatus for producing a printed matter has a storage section for storing inkjet ink containing water, an organic solvent, a resin, and a reactive oil, and an ejection means for ejecting the inkjet ink. and have other means.

The printed matter manufacturing method of the present invention can be preferably implemented by the printed matter manufacturing apparatus of the present invention, the ejection step can be preferably performed by the ejection means, and the other steps can be performed by the other means. It can be carried out more preferably.

<Ejection process and ejection means>
The ejection step is a step of ejecting an inkjet ink containing water, an organic solvent, a resin, and a reactive oil.
The ejection means is means for ejecting an inkjet ink containing water, an organic solvent, a resin, and a reactive oil.

The inkjet ink is the same as the inkjet ink of the present invention.

In the printed matter manufacturing apparatus, the inkjet ink is stored in the storage unit that stores the ink.
The container is not particularly limited as long as it is conventionally used for containing ink for inkjet, and can be appropriately selected according to the purpose. Examples thereof include ink cartridges.

The method for ejecting the inkjet ink is not particularly limited and can be appropriately selected according to the purpose. Examples thereof include a method of applying energy to the inkjet ink to eject the ink.
Examples of the energy include thermal energy and mechanical energy. Examples of energy generating devices include heating devices, pressurizing devices, piezoelectric elements, vibration generating devices, ultrasonic oscillators, and lights. A thermal actuator that utilizes a phase change due to film boiling of a liquid using an electrothermal conversion element such as, a shape memory alloy actuator that uses a metal phase change due to a temperature change, an electrostatic actuator that uses an electrostatic force, and the like.

<Other steps and other means>
The other steps are not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include an image forming step and a heating step.
The other means are not particularly limited and can be appropriately selected according to the purpose. Examples thereof include image forming means and heating means.

<<Image forming step and image forming means>>
The image forming step is a step of ejecting the ink to form an image.
The image forming means is means for forming an image by ejecting the ink.
It should be noted that the image in the present invention means not only characters, symbols, and figures, but also those expressed on a recording medium using ink.
Examples of the image forming means include various recording devices using an inkjet recording method, such as printers, facsimile machines, copiers, printer/fax/copier complex machines, and three-dimensional modeling apparatuses.
In the present invention, the image forming means and image forming process may be referred to as a recording apparatus and recording method.
The recording apparatus and the recording method refer to an apparatus capable of ejecting ink, various treatment liquids, and the like onto a recording medium, and a method of performing recording using the apparatus. A recording medium means a medium to which ink or various processing liquids can adhere even temporarily.
This recording apparatus can include not only a head portion for ejecting ink, but also means for feeding, conveying, and discharging a recording medium, and other devices called pre-processing devices and post-processing devices. .
The recording apparatus and recording method may have heating means used in the heating process and drying means used in the drying process.

<<Heating step and heating means>>
The heating step is a step of heating the image.
The heating means is means for heating the image.
The heating step is not particularly limited as long as the image can be heated together with the recording medium on which the image is printed, and can be appropriately selected according to the purpose.
The heating temperature is not particularly limited and can be appropriately selected depending on the intended purpose. The upper limit of the drying temperature during recording is not particularly limited, and can be appropriately selected according to the intended purpose. Furthermore, from the viewpoint of the wettability of the ink to the substrate, the temperature is preferably 90° C. or lower. The drying temperature before and after recording is not particularly limited and can be appropriately selected according to the purpose.
The heating means is not particularly limited, can be appropriately selected according to the purpose, and can be one integrated with the recording apparatus having the image forming means.

<Recording device, recording method>
The ink of the present invention can be suitably used for various inkjet recording apparatuses, such as printers, facsimile machines, copiers, printer/facsimile/copier complex machines, stereolithography machines, and the like.
In the present invention, a recording apparatus and a recording method refer to an apparatus capable of ejecting ink, various treatment liquids, and the like onto a recording medium, and a method of performing recording using the apparatus. A recording medium means a medium to which ink or various processing liquids can adhere even temporarily.
This recording apparatus can include not only a head portion for ejecting ink, but also means for feeding, conveying, and discharging a recording medium, and other devices called pre-processing devices and post-processing devices. .
The recording apparatus and recording method may have heating means used in the heating process and drying means used in the drying process. The heating means and drying means include, for example, means for heating and drying the printing surface and the back surface of the recording medium. The heating means and drying means are not particularly limited, but for example, hot air heaters and infrared heaters can be used. Heating and drying can be performed before, during, or after printing.
Also, the recording apparatus and recording method are not limited to those that visualize significant images such as characters and graphics with ink. For example, it includes those that form patterns such as geometric patterns, and those that form three-dimensional images.
In addition, unless otherwise specified, the recording apparatus includes both a serial type apparatus in which the ejection head is moved and a line type apparatus in which the ejection head is not moved.
Furthermore, this recording device can be used not only as a desktop type, but also as a wide recording device that can print on A0 size recording media, and for example, can use continuous paper wound into a roll as a recording medium. A continuous feed printer is also included.
An example of a recording apparatus will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a perspective explanatory view of the device. FIG. 2 is a perspective explanatory view of the main tank. An image forming apparatus 400 as an example of a recording apparatus is a serial image forming apparatus. A mechanical unit 420 is provided inside the exterior 401 of the image forming apparatus 400 . Each ink container 411 of the main tank 410 (410k, 410c, 410m, 410y) for each color of black (K), cyan (C), magenta (M), and yellow (Y) is packed with, for example, an aluminum laminated film. It is formed by a member L. The ink containing portion 411 is housed, for example, in a container case 414 made of plastic. Thus, the main tank 410 is used as an ink cartridge for each color.
On the other hand, a cartridge holder 404 is provided on the far side of the opening when the cover 401c of the apparatus main body is opened. A main tank 410 is detachably attached to the cartridge holder 404 . As a result, each ink discharge port 413 of the main tank 410 communicates with the ejection head 434 for each color via the supply tube 436 for each color, and ink can be ejected from the ejection head 434 onto the printing medium.

This recording apparatus can include not only a portion that ejects ink, but also devices called pre-processing devices and post-processing devices.
As an aspect of the pre-treatment device and the post-treatment device, a liquid containing a treatment liquid and a post-treatment liquid in the same manner as in the case of inks such as black (K), cyan (C), magenta (M), and yellow (Y) There is a mode in which a storage section and a liquid ejection head are added, and the treatment liquid and the post-treatment liquid are ejected by an inkjet recording method.
As another aspect of the pre-treatment device and the post-treatment device, there is an aspect in which a pre-treatment device and a post-treatment device using a method other than the inkjet recording method, such as a blade coating method, a roll coating method, and a spray coating method, are provided.

It should be noted that the method of using the ink is not limited to the ink jet recording method, and can be widely used. In addition to the inkjet recording method, for example, a blade coating method, a gravure coating method, a bar coating method, a roll coating method, a dip coating method, a curtain coating method, a slide coating method, a die coating method and a spray coating method can be used.

The use of the ink of the present invention is not particularly limited and can be appropriately selected according to the intended purpose. Furthermore, it can be used not only as an ink to form two-dimensional characters and images, but also as a three-dimensional modeling material for forming a three-dimensional three-dimensional image (three-dimensional object).
A known three-dimensional modeling apparatus for forming three-dimensional objects can be used, and is not particularly limited. be able to. The three-dimensional object includes a three-dimensional object obtained by applying ink repeatedly. It also includes a molded product obtained by processing a structure obtained by applying ink onto a base material such as a recording medium. The molded product is, for example, a sheet-shaped or film-shaped recorded matter or structure that has been subjected to molding such as heat stretching or punching.・Suitably used for applications where molding is performed after the surface is decorated, such as electronic equipment, meters for cameras, and operation panels.

In the present invention, the terms image formation, recording, printing, and printing are all synonymous.

The terms recording medium, medium, and printed material are all synonymous.

Examples of the present invention will be described below, but the present invention is not limited to these examples. In the following examples, unless otherwise specified, the inks were prepared and evaluated under the conditions of a room temperature of 25° C. and a relative humidity of 60% RH.

(Preparation Example 1 of Pigment Dispersion)
<Preparation of black pigment dispersion (dispersant dispersion type)>
After premixing a mixture having the following formulation, the mixture was circulated and dispersed for 7 hours in a disk-type bead mill (KDL type by Shinmaru Enterprises, media: zirconia balls with a diameter of 0.3 mm) to obtain a black pigment dispersion.
[Prescription]
・Carbon black (trade name: Monarch800, manufactured by Cabot): 15 parts by mass ・Anionic surfactant (Pionin A-51-B, manufactured by Takemoto Oil Co., Ltd.): 2 parts by mass ・Ion-exchanged water: 83 parts by mass

(Preparation Example 2 of Pigment Dispersion)
<Preparation of cyan pigment dispersion (dispersant dispersion type)>
In Pigment Dispersion Preparation Example 1, the same procedure as in Pigment Dispersion Preparation Example 1 was performed, except that the carbon black was changed to Pigment Blue 15:3 (trade name: LIONOL BLUE FG-7351, manufactured by Toyo Ink Co., Ltd.). to obtain a cyan pigment dispersion.

(Preparation Example 3 of pigment dispersion)
<Preparation of Magenta Pigment Dispersion (Dispersant Dispersion Type)>
A magenta pigment was prepared in the same manner as in Pigment Dispersion Preparation Example 1, except that carbon black was changed to Pigment Red 122 (trade name: Toner Magenta EO02, manufactured by Clariant Japan Co., Ltd.). A dispersion was obtained.

(Preparation Example 4 of Pigment Dispersion)
<Preparation of yellow pigment dispersion (dispersant dispersion type)>
In Preparation Example 1 of Pigment Dispersion, in the same manner as in Preparation Example 1 of Pigment Dispersion, except that carbon black was changed to Pigment Yellow 74 (trade name: Fast Yellow 531, manufactured by Dainichiseika Kogyo Co., Ltd.). A yellow pigment dispersion was obtained.

(Preparation Example 5 of pigment dispersion)
<Preparation of black pigment dispersion (resin-coated type)>
<<Preparation of polymer solution>>
After sufficiently replacing the inside of a 1 L flask equipped with a mechanical stirrer, thermometer, nitrogen gas inlet tube, reflux tube, and dropping funnel with nitrogen gas, 11.2 g of styrene, 2.8 g of acrylic acid, and 12.0 g of lauryl methacrylate were added. , 4.0 g of polyethylene glycol methacrylate, 4.0 g of styrene macromer, and 0.4 g of mercaptoethanol were mixed and heated to 65°C. Next, styrene 100.8 g, acrylic acid 25.2 g, lauryl methacrylate 108.0 g, polyethylene glycol methacrylate 36.0 g, hydroxylethyl methacrylate 60.0 g, styrene macromer 36.0 g, mercaptoethanol 3.6 g, azobismethyl valero. A mixed solution of 2.4 g of nitrile and 18 g of methyl ethyl ketone was dropped into the flask over 2.5 hours. After dropping, a mixed solution of 0.8 g of azobismethylvaleronitrile and 18 g of methyl ethyl ketone was dropped into the flask over 0.5 hours. After aging at 65° C. for 1 hour, 0.8 g of azobismethylvaleronitrile was added and further aged for 1 hour. After completion of the reaction, 364 g of methyl ethyl ketone was added into the flask to obtain 800 g of a polymer solution having a concentration of 50% by mass.
<<Preparation of Pigment-Containing Polymer Fine Particle Dispersion>>
After sufficiently stirring 28 g of the obtained polymer solution, 42 g of carbon black (trade name: Monarch800, manufactured by Cabot Corporation), 13.6 g of 1 mol/L potassium hydroxide aqueous solution, 20 g of methyl ethyl ketone, and 13.6 g of deionized water, , and kneaded using a roll mill to obtain a paste.
The obtained paste was poured into 200 g of pure water and stirred thoroughly, and then methyl ethyl ketone and water were distilled off using an evaporator. Pressure filtration was carried out using a filter to obtain a black pigment dispersion (resin dispersion type) containing 15% by mass of pigment and 20% by mass of solid content.

(Preparation Example 6 of pigment dispersion)
<Preparation of cyan pigment dispersion (resin-coated type)>
In Pigment Dispersion Preparation Example 5, the same procedure as in Pigment Dispersion Preparation Example 5 was performed, except that carbon black was changed to Pigment Blue 15:3 (trade name: LIONOL BLUE FG-7351, manufactured by Toyo Ink Co., Ltd.). , a cyan pigment dispersion (resin dispersion type) having a pigment concentration of 15% by mass and a solid content of 20% by mass was obtained.

(Preparation Example 7 of pigment dispersion)
<Preparation of magenta pigment dispersion (resin-coated type)>
In Pigment Dispersion Preparation Example 5, the pigment concentration was adjusted in the same manner as in Pigment Dispersion Preparation Example 5, except that the carbon black was changed to Pigment Red 122 (trade name: Toner Magenta EO02, manufactured by Clariant Japan Co., Ltd.). A magenta pigment dispersion (resin dispersion type) having a solid content of 15% by mass and a solid content of 20% by mass was obtained.

(Preparation Example 8 of pigment dispersion)
<Preparation of yellow pigment dispersion (resin-coated type)>
In the same manner as in Pigment Dispersion Preparation Example 5, except that carbon black was changed to Pigment Yellow 74 (trade name: Fast Yellow 531, manufactured by Dainichiseika Kogyo Co., Ltd.). As a result, a yellow pigment dispersion (resin dispersion type) having a pigment concentration of 15% by mass and a solid content of 20% by mass was obtained.

(Examples 1 to 32 and Comparative Examples 1 to 5)
<Ink production>
Each material was mixed and stirred according to the ink formulations shown in Tables 1 to 5, and filtered through a polypropylene filter having an average pore size of 1.0 μm to produce each ink. In addition, content of resin is solid content concentration (mass %).
Next, the "viscosity of the ink" was measured as follows for each of the obtained inks. The results are shown in Tables 1-5.

<Viscosity of ink at 25°C>
The viscosity of each ink was measured using a rotary viscometer (manufactured by Toki Sangyo Co., Ltd., RE-80L). Measurement conditions were as follows: 25° C., standard cone rotor (1°34′×R24), sample liquid volume 1.2 mL, number of revolutions 50 rpm, 3 minutes.

[Image formation]
The prepared cyan ink, magenta ink, yellow ink, and black ink are combined in the combinations shown in Tables 1 to 5, respectively, and filled into the ink storage container of a modified inkjet recording apparatus (VC-60000, manufactured by Ricoh Co., Ltd.). Image formation was performed under the following conditions.
-Image forming conditions-
・Image forming speed: 50 m/min ・Resolution: 1200 dpi×1200 dpi
• Image: Solid images of black, cyan, magenta, and yellow were superimposed and formed.
・Base material: PVC film (product name: GIY11Z5, manufactured by Lintec Corporation), PET film (product name: Viewful UV TP-188, manufactured by Kimoto Co., Ltd.), cotton broadcloth (product name: cotton broadcloth natural, manufactured by Nisshinbo Co., Ltd.) )
-Drying conditions-
・Preheat temperature: 55℃
・Temperature during image formation: 55°C
・Drying temperature (heating after image formation): 80°C

Next, various characteristics were evaluated according to the following methods and evaluation criteria. The results are shown in Tables 1-5.

<Scratch resistance test>
The image forming portion was rubbed 25 times with a cotton cloth under a load of 200 g, and the state of the cotton cloth and the image was visually observed and evaluated according to the following evaluation criteria.
[Evaluation criteria]
◎: No problem on both cotton cloth and image ○: Cotton cloth is colored, but no more than conspicuous image △: Cotton cloth is colored, image abnormality is immediately visible (base material is not exposed)
×: The cotton cloth is colored and the base material is exposed

<Drying time (drying property)>
After forming an ink coating film on polyethylene terephthalate (PET) (Kimoto TP188, manufactured by Kimoto Co., Ltd.) (70 mm × 150 mm) with a bar coater at room temperature (25 ° C.), place the coating film on a hot plate at 80 ° C. and dry. The time required for up to was measured and evaluated according to the following criteria.
Whether or not it is dried is determined by placing a 2 cm × 2 cm PET (Kimoto TP180, manufactured by Kimoto Co., Ltd.) on the ink coating film, applying a constant load and allowing it to stand for 10 seconds, and then applying a 2 cm × 2 cm PET ( Kimoto TP180 (manufactured by Kimoto Co., Ltd.) was peeled off, and the ink coating film was defined as dry at the point when there was no show-through.
-Evaluation conditions-
Base material: PET (Kimoto TP180, manufactured by Kimoto Co., Ltd.)
Coating film formation method: wire bar linear, diameter (Φ) 0.3 mm
Coating drying method: Hot plate 55°C
Load: blocking jig (load: 103 g/cm ² )
[Evaluation criteria]
〇: Dry within 3 minutes ×: Dry for longer than 3 minutes

<Ejection reliability>
The prepared cyan ink, magenta ink, yellow ink, and black ink are combined in the combinations shown in Tables 1 to 5, respectively, and filled into the ink storage container of a modified inkjet recording apparatus (VC-60000, manufactured by Ricoh Co., Ltd.). After continuous ejection for 45 minutes, ejection reliability was evaluated based on the following evaluation criteria.
[Evaluation criteria]
◎: Disturbance or failure of ejection is not observed at all ○: Disturbance or failure of ejection from 5 nozzles or less but recovers quickly △: Disturbance or failure of ejection from 10 nozzles or less ×: Disturbed ejection or failure of ejection there is

Detailed contents of each component in Tables 1 to 5 are as follows.
[resin]
・ Acrylic resin (A): Product name: Mowinyl 6969D, manufactured by Japan Coating Resin Co., Ltd., volume average particle size 110 nm, solid content concentration 42%
・ Acrylic resin (B): Product name: Mowinyl 6899D, manufactured by Japan Coating Resin Co., Ltd., volume average particle size 100 nm, solid content concentration 46%
・ Urethane resin (C): Product name: W6110, manufactured by Mitsui Chemicals, Inc., volume average particle size 90 nm, solid content concentration 33%
・ Urethane resin (D): Product name: Superflex 210, manufactured by Daiichi Kogyo Co., Ltd., volume average particle diameter 40 nm, solid content concentration 35%
[Plastic organic solvent]
3-Methoxy-N,N-dimethylpropionamide, trade name: Equamid M-100, manufactured by Idemitsu Kosan Co., Ltd. 3-butoxy-N,N-dimethylpropionamide, trade name: KJCBPA (registered trademark)-100, Manufactured by KJ Chemicals Co., Ltd. [Water-soluble organic solvent]
・PG: propylene glycol, trade name: propylene glycol, manufactured by Kurimoto Pharmaceutical Co., Ltd. ・3-methyl-1,3-butanediol, trade name: isoprene glycol, manufactured by Kuraray Co., Ltd. [reactive oil]
・Flaxseed oil, product name: linseed oil, manufactured by Nacalai Tesque Co., Ltd., paulownia oil, product name: paulownia oil, manufactured by Yoneyama Pharmaceutical Co., Ltd., poppy oil, product name: poppy oil, manufactured by Holbein Art Materials Co., Ltd., cottonseed oil, product name: Cottonseed oil, manufactured by Wako Pure Chemical Industries, Ltd. The Wiiss-cyclohexane method was used to determine that the above material was a drying oil. Specifically, the inkjet ink is subjected to centrifugal filtration using a centrifuge (Optima MAX-XP, 150,000 rpm, 0.5 hr). The amount of halogen that reacts with 100 g of the ink (sample) obtained by centrifugal filtration is converted to the number of grams of iodine, and the reactive oil in the ink is measured by measuring the number of carbon-carbon double bonds contained in the sample. was measured for iodine value.
[Surfactant]
・ Polysiloxane surfactant: Product name: BYK-348, manufactured by BYK-Chemie Japan Co., Ltd.

Embodiments of the present invention are, for example, as follows.
<1> An inkjet ink characterized by containing water, an organic solvent, a resin, and a reactive oil.
<2> The inkjet ink according to <1>, wherein the reactive oil has an iodine value of 130 or more as measured in accordance with JIS K 0070-1992 and is a drying oil that solidifies by oxidative polymerization. Ink.
<3> The inkjet ink according to <2>, wherein the content of the drying oil is 0.05% by mass or more and 10% by mass or less.
<4> The inkjet ink according to any one of <1> to <3>, wherein the content of the organic solvent is 5% by mass or more and 40% by mass or less.
<5> The inkjet ink according to any one of <1> to <4>, wherein the viscosity at 25°C is 6 mPa·s or more and 13 mPa·s or less.
<6> A method for producing a printed matter, comprising an ejection step of ejecting an inkjet ink containing water, an organic solvent, a resin, and a reactive oil.
<7> The method for producing a printed matter according to <6>, further comprising an image forming step of forming an image by ejecting the inkjet ink.
<8> The method for producing a printed matter according to <7>, further including a heating step of heating the image.
<9> a container for containing an inkjet ink containing water, an organic solvent, a resin, and a reactive oil;
and ejecting means for ejecting the inkjet ink.

According to the inkjet ink according to any one of <1> to <5>, the method for producing printed matter according to <6> to <8>, and the apparatus for producing printed matter according to <9>, conventional It is possible to solve the problems in and achieve the object of the present invention.

400 Image forming apparatus 401 Exterior of image forming apparatus 401c Cover of apparatus main body 404 Cartridge holder 410 Main tank 410k, 410c, 410m, 410y For black (K), cyan (C), magenta (M), and yellow (Y) main tank 411 ink storage unit 413 ink discharge port 414 storage container case 420 mechanism unit 434 ejection head 436 supply tube

Japanese Patent Application Laid-Open No. 2017-109420

Claims (9)

An inkjet ink comprising water, an organic solvent, a resin, and a reactive oil. 2. The inkjet ink according to claim 1, wherein the reactive oil has an iodine value of 130 or more as measured in accordance with JIS K 0070-1992 and is a drying oil that is solidified by oxidative polymerization. 3. The inkjet ink according to claim 2, wherein the content of the drying oil is 0.05% by mass or more and 10% by mass or less. The inkjet ink according to any one of claims 1 to 3, wherein the content of the organic solvent is 5% by mass or more and 40% by mass or less. The inkjet ink according to any one of claims 1 to 4, wherein the viscosity at 25°C is 6 mPa·s or more and 13 mPa·s or less. 1. A method for producing a printed matter, comprising an ejection step of ejecting an inkjet ink containing water, an organic solvent, a resin, and a reactive oil. 7. The method of manufacturing a printed matter according to claim 6, further comprising an image forming step of forming an image by ejecting the inkjet ink. 8. The method of manufacturing a printed matter according to claim 7, further comprising a heating step of heating the image. a storage unit that stores an inkjet ink containing water, an organic solvent, a resin, and a reactive oil;
and ejecting means for ejecting the inkjet ink.

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