Aqueous inkjet ink composition, recording method, and recording device

Abstract

To provide an aqueous inkjet ink composition capable of reducing carbon dioxide emissions while exhibiting excellent recording quality.SOLUTION: An aqueous inkjet ink composition comprises a colorant that is at least one selected from biomass-derived raw materials and recycled materials, or a binder resin that is at least one selected from biomass-derived raw materials and recycled materials, and an organic solvent that is at least one selected from biomass-derived raw materials and recycled materials.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a water-based inkjet ink composition, a recording method, and a recording apparatus. [Background technology]

[0002] Inkjet recording methods are capable of recording high-resolution images using relatively simple equipment and have been rapidly developing in various fields. In recent years, environmental issues have become a concern, and environmentally friendly inks have been developed by using materials derived from natural products. As an example of an ink using materials derived from natural products, Patent Document 1 discloses an inkjet ink composition containing water, a plant-derived carbonized colorant, and a lignin resin, with the aim of providing an ink composition that has excellent color development properties while also exhibiting excellent ejection reliability, such as redispersibility and clogging recovery properties. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-167623 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, as in Patent Document 1, there is still room for improvement in the effect of reducing carbon dioxide (CO2) in ink compositions in which only a portion of the raw materials are changed to plant-derived materials. [Means for solving the problem]

[0005] The aqueous inkjet ink composition of the present invention contains a colorant that is one or more of biomass-derived raw materials and recycled materials, or a binder resin that is one or more of biomass-derived raw materials and recycled materials, and an organic solvent that is one or more of biomass-derived raw materials and recycled materials.

[0006] The recording method of the present invention comprises a step of ejecting the above-described water-based inkjet ink composition from an inkjet head and depositing it onto a recording medium.

[0007] The recording apparatus of the present invention comprises the above-described water-based ink-jet ink composition and an ink-jet head having nozzles for ejecting the water-based ink-jet ink composition onto a recording medium. [Brief explanation of the drawings]

[0008] [Figure 1] Table 1 shows the compositions used in the examples and the evaluation results thereof. [Figure 2] FIG. 2 is a diagram illustrating an example of a recording apparatus used in the recording method of the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention (hereinafter referred to as "the present embodiment") will be described in detail with reference to the drawings as necessary, but the present invention is not limited to this, and various modifications are possible without departing from the spirit of the present invention. In the drawings, the same elements are given the same reference numerals, and redundant explanations will be omitted. Furthermore, positional relationships such as up, down, left, and right will be based on the positional relationships shown in the drawings unless otherwise specified. Furthermore, the dimensional ratios of the drawings are not limited to those shown in the drawings.

[0010] 1. Water-based inkjet ink composition The aqueous inkjet ink composition according to this embodiment (hereinafter also simply referred to as the "ink composition") contains a colorant that is one or more types of biomass-derived raw materials and recycled materials (hereinafter also simply referred to as "biomass-derived raw materials, etc."), or a binder resin that is one or more types of biomass-derived raw materials and recycled materials, and an organic solvent that is one or more types of biomass-derived raw materials and recycled materials.

[0011] In recent years, due to concerns about environmental issues, reducing the environmental impact has become an important issue in ink development. Inks made with petroleum-derived synthetic materials emit large amounts of carbon dioxide (CO2) during the manufacturing process and disposal, so the development of inks made with biomass-derived materials and recycled materials has been considered. For example, plant charcoal, such as bamboo charcoal and wood charcoal, can be used as biological colorants as raw materials for such inks. Furthermore, the use of recycled materials, in which some or all of the binder resin used in a product is recovered, separated, and reused, is also being considered.

[0012] Therefore, the present invention provides an aqueous inkjet ink composition that exhibits good recording quality while significantly reducing carbon dioxide emissions by containing one or more biomass-derived raw materials and recycled materials as colorant and binder resin components, and further containing an organic solvent that is one or more biomass-derived raw materials and recycled materials. The reason for this is not particularly limited, but although the organic solvent accounts for a larger proportion of the content in the ink composition than the other components, even when the ink composition contains an organic solvent that is not a core component of the ink composition and is one or more biomass-derived raw materials and recycled materials, the impact on quality can be suppressed, making it possible to maintain recording quality, particularly storage stability, redispersibility, ejection stability, and color development, while significantly reducing carbon dioxide emissions. However, the reason for this is not limited to the above.

[0013] In this specification, "biomass-derived raw materials" refers to raw materials derived from living organisms such as plants and animals, rather than petroleum-derived raw materials. Also, in this specification, "recycled materials" refers to materials that have been used as products and are recovered and reused in part or in whole.

[0014] In the ink composition, it is preferable that the above-mentioned colorant or binder resin is one or more of biomass-derived raw materials and recycled materials based on sorting management, and that the above-mentioned organic solvent is one or more of biomass-derived raw materials and recycled materials based on the mass balance method. Since colorants and binder resins are core components used in most inks, they are required to have high functionality and quality. Preparation using biomass-derived raw materials or recycled materials requires advanced technology to resolve issues such as the inclusion of metal impurities and maintain quality. Furthermore, the content of these components in ink compositions is relatively low, limiting their contribution to reducing carbon dioxide emissions. Therefore, using the above-mentioned colorant or binder resin, as well as the organic solvent, tends to result in an ink composition with excellent recording quality while further reducing carbon dioxide emissions.

[0015] In this specification, "separation management" refers to the use of only accurately separated materials, and the use of raw materials and materials that have been managed in this manner allows the content of the target active ingredient to be accurately determined, which tends to result in an ink composition with even better recording quality. Specific examples of separation management include the identity preservation method and the segregation method. From the perspective of maintaining recording quality, it is preferable to use raw materials and materials that have been separated and managed for components that are added in relatively small amounts to the ink composition.

[0016] The "mass balance method" is a method for guaranteeing the content of biomass-derived or recycled materials in the final product by including biomass-derived raw materials as part of the final product during the production of raw materials or materials and managing the amount of biomass-derived raw materials used. A third-party certified organization guarantees the content of biomass-derived raw materials. Because multiple raw materials with the same components can be mixed without separating them into a single type, large-scale production is possible, and large quantities of products tend to be readily available. When using organic solvents containing biomass-derived raw materials produced based on this mass balance method, the ink composition contains a relatively high proportion of organic solvent, making it less susceptible to the effects of the input amount than components containing small amounts of coloring materials, binder resins, etc., and therefore tends to produce ink compositions that reduce carbon dioxide emissions while maintaining excellent recording quality.

[0017] Components that may be contained in the ink composition according to this embodiment and a production method thereof will be described in detail below.

[0018] 1.1.Colorants The ink composition may contain one or more coloring materials selected from biomass-derived raw materials, and may contain coloring materials that are not biomass-derived raw materials or recycled materials, as necessary. The coloring materials are not particularly limited and may include pigments, dyes, and the like. From the viewpoint of more effectively and reliably achieving the effects of the present invention, it is preferable to use one or more coloring materials selected from biomass-derived raw materials. One coloring material may be used alone, or two or more coloring materials may be used in combination.

[0019] The content of the coloring material is preferably 0 to 10% by mass, 0.5 to 8% by mass, or 3 to 7% by mass relative to the total amount of the ink composition. By keeping the content of the coloring material within the above range, the ink composition tends to have better recording quality while reducing carbon dioxide emissions.

[0020] The content of the colorant, which is one or more types of biomass-derived raw materials, is preferably 0 to 10 mass %, 0.5 to 8 mass %, or 3 to 7 mass %, relative to the total amount of the ink composition. By keeping the content of the colorant within the above range, the ink composition tends to have better recording quality while reducing carbon dioxide emissions.

[0021] 1.1.1.Pigments Examples of pigments include inorganic pigments and organic pigments. Examples of inorganic pigments include titanium oxide and iron oxide, as well as carbon black produced by known methods such as the contact method, furnace method, and thermal method. Examples of organic pigments include azo pigments (including azo lakes, insoluble azo pigments, condensed azo pigments, and chelate azo pigments), polycyclic pigments (such as phthalocyanine pigments, perylene pigments, perinone pigments, anthraquinone pigments, and quinophthalone pigments), nitro pigments, nitroso pigments, and aniline black. It is preferable for pigments to be made from biomass-derived raw materials.

[0022] Specific examples of pigments include black pigments such as carbon black. Examples of carbon black include, but are not limited to, furnace black, lamp black, acetylene black, and channel black (CI Pigment Black 7). Commercially available carbon black products include "Carbon Black #2650," "#2600," "#2300," "#2200," "#1000," "#980," "#970," "#960," "#950," "#900," "#850," "MCF88," "#55," "#52," "#50," "#47," "#45," "#45L," "#44," "#33," "#32," and "#30" (all manufactured by Mitsubishi Chemical Corporation), "MONARCH800," "-4630," "-430," "-900," "-1100," "-1300," "-1400," "REAGAL400R," "-660R," and "MOUGAL Examples of suitable inks include "Printex-L" (all manufactured by Cabot Corporation), "Printex-95", "-90", "-85", "-75", "-55", "-45", "-300", and "-Nature" (all manufactured by Orion Engineered Carbon Corporation), and "Raven-5000ULTRAIII", "-7000", "-5750", "-5250", "-2500URTRA", "-2000", "-1500", "-1255", "-1250", "-1200", "-1190URTRA", "-1170", and "-1020" (all manufactured by Columbian Chemical). Among these, PRINTEX-Nature is preferred from the viewpoint of more effectively and reliably achieving the effects of the present invention.

[0023] Examples of white pigments include CI Pigment White 6, 18, and 21, as well as white inorganic pigments such as titanium oxide, zinc oxide, zinc sulfide, antimony oxide, magnesium oxide, and zirconium oxide. In addition to these white inorganic pigments, white organic pigments such as white hollow resin particles and polymer particles can also be used.

[0024] Examples of pigments used in yellow inks include CI Pigment Yellow 1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 14, 16, 17, 24, 34, 35, 37, 53, 55, 65, 73, 74, 75, 81, 83, 93, 94, 95, 97, 98, 99, 108, 109, 110, 113, 114, 117, 120, 124, 128, 129, 133, 138, 139, 147, 151, 153, 154, 167, 172, and 180.

[0025] Examples of pigments used in magenta inks include CI Pigment Red 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 21, 22, 23, 30, 31, 32, 37, 38, 40, 41, 42, 48(Ca), 48(Mn), 57(Ca), 57:1, 88, 112, 114, 122, 123, 144, 146, 149, 150, 166, 168, 170, 171, 175, 176, 177, 178, 179, 184, 185, 187, 202, 209, 219, 224, and 245, and CI Pigment Violet. Examples include 19, 23, 32, 33, 36, 38, 43, and 50.

[0026] Examples of pigments used in cyan inks include CI Pigment Blue 1, 2, 3, 15, 15:1, 15:2, 15:3, 15:34, 15:4, 16, 18, 22, 25, 60, 65, and 66, and CI Vat Blue 4 and 60.

[0027] The ink composition preferably contains a colorant having a color index number and is a yellow ink, a magenta ink, or a cyan ink. Such ink compositions tend to reduce carbon dioxide emissions while also providing excellent recording quality.

[0028] Pigments used in color inks other than magenta, cyan, and yellow are not particularly limited, but examples thereof include CI Pigment Green 7 and 10, CI Pigment Brown 3, 5, 25, and 26, and CI Pigment Orange 1, 2, 5, 7, 13, 14, 15, 16, 24, 34, 36, 38, 40, 43, and 63.

[0029] Examples of pearl pigments include pigments having pearlescent or interference luster, such as titanium dioxide-coated mica, fish scale foil, and bismuth oxychloride. Examples of metallic pigments include particles of aluminum, silver, gold, platinum, nickel, chromium, tin, zinc, indium, titanium, copper, or other elements, or alloys thereof.

[0030] In order to apply the above-mentioned pigments to aqueous inkjet ink compositions, it is necessary to stably disperse and maintain the pigments in water. Methods for achieving this include dispersing the pigments in a dispersant resin such as a water-soluble resin and / or a water-dispersible resin (hereinafter, pigments dispersed by this method will also be referred to as "resin-dispersed pigments"), dispersing the pigments in a surfactant such as a water-soluble surfactant and / or a water-dispersible surfactant (hereinafter, pigments dispersed by this method will also be referred to as "surfactant-dispersed pigments"), and chemically or physically introducing hydrophilic functional groups onto the pigment particle surfaces to make them dispersible and / or soluble in water without a dispersant such as a resin or surfactant (hereinafter, pigments dispersed by this method will also be referred to as "surface-treated pigments").

[0031] The ink composition is preferably a colored ink composition containing one or more colorants selected from biomass-derived raw materials, and the colorant is a surface-treated pigment or a resin-dispersed pigment. Such a colored ink composition tends to reduce carbon dioxide emissions and provide even better recording quality.

[0032] Examples of hydrophilic functional groups of the surface-treated pigment include -OM, -COOM, -CO-, -SO3M, -SON2NH3, -RSO3M, -PO3HM, -PO3M3, -SONHCOR, -NH3, and -NR3 (wherein M represents a hydrogen atom, an alkali metal, ammonium, or organic ammonium, and R represents an alkyl group having 1 to 12 carbon atoms, an optionally substituted phenyl group, or an optionally substituted naphthyl group). These functional groups are physically and / or chemically introduced onto the pigment particle surface by grafting directly and / or via other groups. Examples of polyvalent groups include alkylene groups having 1 to 12 carbon atoms, phenylene groups having optionally substituted, and naphthylene groups having optionally substituted.

[0033] Various known surface treatment methods can be used to graft functional groups or salts thereof onto the surface of pigment particles directly or via polyvalent groups. For example, a method of treating commercially available oxidized carbon black with ozone or sodium hypochlorite solution to further oxidize the carbon black and make the surface more hydrophilic (e.g., JP-A-7-258578, JP-A-8-3498, JP-A-10-120958, JP-A-10-195331, JP-A-10-237349), a method of treating carbon black with 3-amino-N-alkyl-substituted pyridinium bromide (e.g., JP-A-10-195360, JP-A-10-3306), and a method of treating carbon black with 3-amino-N-alkyl-substituted pyridinium bromide (e.g., JP-A-10-237349). 65), a method of dispersing an organic pigment in a solvent in which the organic pigment is insoluble or poorly soluble, and introducing sulfonic groups onto the pigment particle surface using a sulfonating agent (for example, JP-A-8-283596, JP-A-10-110110, and JP-A-10-110111), a method of dispersing an organic pigment in a basic solvent that forms a complex with sulfur trioxide, and adding sulfur trioxide to treat the surface of the organic pigment, thereby introducing sulfonic groups or sulfoneamino groups (for example, JP-A-10-110114).

[0034] The functional group grafted to one pigment particle may be of a single type or of multiple types. The type and degree of grafting of the functional group may be appropriately determined taking into consideration the dispersion stability in the ink, color density, drying properties at the front face of the inkjet head, etc.

[0035] Dispersant resins used in resin-dispersed pigments include polyvinyl alcohols, polyvinylpyrrolidones, polyacrylic acid, acrylic acid-acrylonitrile copolymers, vinyl acetate-acrylate copolymers, acrylic acid-acrylate copolymers, styrene-acrylic acid copolymers, styrene-methacrylic acid copolymers, styrene-methacrylic acid-acrylate copolymers, styrene-α-methylstyrene-acrylic acid copolymers, styrene-α-methylstyrene-acrylic acid-acrylate copolymers, styrene-maleic acid copolymers, styrene-maleic anhydride copolymers, vinylnaphthalene-acrylic acid copolymers, vinylnaphthalene-maleic acid copolymers, vinyl acetate-maleic acid ester copolymers, vinyl acetate-crotonic acid copolymers, vinyl acetate-acrylic acid copolymers, and salts thereof. Among these, copolymers of monomers with hydrophobic functional groups and monomers with hydrophilic functional groups, and polymers composed of monomers with both hydrophobic and hydrophilic functional groups, are particularly preferred. The copolymers can be random copolymers, block copolymers, alternating copolymers, or graft copolymers.

[0036] Examples of the salt include salts with basic compounds such as ammonia, ethylamine, diethylamine, triethylamine, propylamine, isopropylamine, dipropylamine, butylamine, isobutylamine, diethanolamine, triethanolamine, tri-isopropanolamine, aminomethylpropanol, morpholine, etc. The amount of these basic compounds added is not particularly limited as long as it is equal to or greater than the neutralization equivalent of the dispersant resin.

[0037] The molecular weight of the dispersant resin is preferably in the range of 1,000 to 100,000, or 3,000 to 10,000, in terms of weight average molecular weight. When the molecular weight is in the above range, stable dispersion of the colorant in water is obtained, and viscosity control when applied to an ink composition tends to be easier.

[0038] Specific examples of commercially available dispersant resins described above include BYK2015 (trade name, manufactured by BYK Japan Co., Ltd.), JONCRYL 67, JONCRYL 678, JONCRYL 586, JONCRYL 611, JONCRYL 680, JONCRYL 682, JONCRYL 683, and JONCRYL 690 (all trade names, manufactured by BASF Japan Co., Ltd.).

[0039] Examples of surfactants used in surfactant-dispersed pigments include anionic surfactants such as alkanesulfonates, α-olefinsulfonates, alkylbenzenesulfonates, alkylnaphthalenesulfonates, acylmethyltaurates, dialkylsulfosuccinates, alkyl sulfates, sulfated olefins, polyoxyethylene alkyl ether sulfates, alkyl phosphates, polyoxyethylene alkyl ether phosphates, and monoglycerite phosphates; amphoteric surfactants such as alkylpyridinium salts, alkylamino acid salts, and alkyldimethylbetaines; and nonionic surfactants such as polyoxyethylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene alkyl esters, polyoxyethylene alkylamides, glycerin alkyl esters, and sorbitan alkyl esters.

[0040] The ink composition may contain a colorant derived from plant charcoal as a biomass-derived raw material. Examples of plant charcoal-derived colorants that can be used include binchotan charcoal, bamboo charcoal, activated charcoal, white charcoal, black charcoal, shaped charcoal, sawdust charcoal, plum charcoal, activated charcoal, mangrove charcoal, and coconut shell charcoal. From the viewpoint of further improving the storage stability of the ink composition while reducing carbon dioxide emissions, binchotan charcoal is preferred.

[0041] The ink composition is preferably a black ink containing vegetable charcoal or a chromatic ink containing a coloring material other than vegetable charcoal. By using such an ink composition, carbon dioxide emissions can be reduced while the ink composition is capable of expressing a variety of colors and tends to have excellent recording quality.

[0042] The content of the colorant derived from vegetable charcoal is preferably 0 to 10 mass%, 0.5 to 8 mass%, or 3 to 7 mass%, relative to the total amount of the ink composition. By setting the content of the colorant derived from vegetable charcoal within the above range, the effects of the present invention tend to be more effectively and reliably achieved.

[0043] The ink composition is preferably a black ink containing carbon black, which is a recycled material. Such black ink tends to reduce carbon dioxide emissions while also providing excellent recording quality.

[0044] The content of the pigment is preferably 0 to 10 mass %, 0.5 to 8 mass %, or 3 to 7 mass %, relative to the total amount of the ink composition. By keeping the content of the pigment within the above range, the effects of the present invention tend to be more effectively and reliably achieved.

[0045] 1.1.2.Dye The dye is an organic coloring component that dissolves in water, and examples thereof include common inkjet dyes classified in the Color Index as acid dyes, direct dyes, reactive dyes, vat dyes, sulfur dyes, or food dyes, as well as natural dyes such as indigo, shikonin, safflower dyes, turmeric dyes, gardenia dyes, and annatto dyes. Of these, indigo is preferred from the viewpoint of more effectively and reliably achieving the effects of the present invention.

[0046] Specific examples of yellow dyes among inkjet dyes include CI Acid Yellow 1, 3, 11, 17, 19, 23, 25, 29, 36, 38, 40, 42, 44, 49, 59, 61, 70, 72, 75, 76, 78, 79, 98, 99, 110, 111, 127, 131, 135, 142, 162, 164, and 165, and CI Direct Yellow 1, 8, 11, 12, and 24. 26, 27, 33, 39, 44, 50, 58, 85, 86, 87, 88, 89, 98, 110, 132, 142, 144, CI Reactive Yellow 1, 2, 3, 4, 6, 7, 11, 12, 13, 14, 15, 16, 17, 18, 22, 23, 24, 25, 26, 27, 37, 42, CI Food Yellow 3, 4, CI Solvent Yellow 15, 19, 21, 30, 109.

[0047] Examples of red dyes include CI Acid Red 1, 6, 8, 9, 13, 14, 18, 26, 27, 32, 35, 37, 42, 51, 52, 57, 75, 77, 80, 82, 85, 87, 88, 89, 92, 94, 97, 106, 111, 114, 115, 117, 118, 119, 129, 130, 131, and 133. , 134, 138, 143, 145, 154, 155, 158, 168, 180, 183, 184, 186, 194, 198, 209, 211, 215, 219, 249, 252, 254, 262, 265, 274, 282, 289, 303, 317, 320, 321, 322, CI Direct Red 1, 2, 4, 9, 1 1, 13, 17, 20, 23, 24, 28, 31, 33, 37, 39, 44, 46, 62, 63, 75, 79, 80, 81, 83, 84, 89, 95, 99, 113, 197, 201, 218, 220, 224, 225, 226, 227, 228, 229, 230, 231, CI Reactive Red 1, 2, 3, 4, 5, 6 , 7, 8, 11, 12, 13, 15, 16, 17, 19, 20, 21, 22, 23, 24, 28, 29, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 45, 46, 49, 50, 58, 59, 63, 64, CI Solubilize Red 1, CI Food Red 7, 9, 14.

[0048] Examples of blue dyes include CI Acid Blue 1, 7, 9, 15, 22, 23, 25, 27, 29, 40, 41, 43, 45, 54, 59, 60, 62, 72, 74, 78, 80, 82, 83, 90, 92, 93, 100, 102, 103, 104, 112, 113, 117, 120, 126, 127, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 1, 138, 140, 142, 143, 151, 154, 158, 161, 166, 167, 168, 170, 171, 182, 183, 184, 187, 192, 199, 203, 204, 205, 229, 234, 236, 249, CI Direct Blue 1, 2, 6, 15, 22, 25, 41, 71, 76, 77, 78, 80 , 86, 87, 90, 98, 106, 108, 120, 123, 158, 160, 163, 165, 168, 192, 193, 194, 195, 196, 199, 200, 201, 202, 203, 207, 225, 226, 236, 237, 246, 248, 249, CI Reactive Blue 1, 2, 3, 4, 5, 7, 8, 9, 13, 14, 15, 17, 18, 19, 20, 21, 25, 26, 27, 28, 29, 31, 32, 33, 34, 37, 38, 39, 40, 41, 43, 44, 46, CI Solubilize Bat Blue 1, 5, 41, CI Bat Blue 29, CI Food Blue 1, 2, CI Basic Blue 9, 25, 28, 29, 44.

[0049] Examples of black dyes include CI Acid Black 1, 2, 7, 24, 26, 29, 31, 48, 50, 51, 52, 58, 60, 62, 63, 64, 67, 72, 76, 77, 94, 107, 108, 09, 110, 112, 115, 118, 119, 121, 122, 131, 132, 139, 140, 155, 156, 157, 158, 159, 191, and CI Direct Black 17, 19, 22, 32, 38, 51, 56, 62, 71, 74, 75, 77, 94, 105, 106, 107, 108, 112, 113, 117, 118, 132, 133, 146, 154, 168, CI Reactive Black 1, 3, 4, 5, 6, 8, 9, 10, 12, 13, 14, 18, CI Solubilize Bat Black 1, and C.I. Food Black 2.

[0050] The content of the dye is preferably 0 to 10 mass %, 0.5 to 8 mass %, or 1 to 6 mass %, relative to the total amount of the ink composition. By setting the content of the dye within the above range, the effects of the present invention tend to be more effectively and reliably achieved.

[0051] 1.2.Binder resin Examples of binder resins include polyester resins, polyurethane resins, acrylic resins, fluororesins, and natural resins. These binder resins are often handled in emulsion form, i.e., resin dispersions, but may also be supplied in powder form. From the viewpoint of more effectively and reliably achieving the effects of the present invention, it is preferable to use one or more types of raw materials derived from biomass. One type of binder resin may be used alone, or two or more types may be used in combination.

[0052] The ink composition preferably contains one or more binder resins selected from the group consisting of polyester resins, polyurethane resins, and acrylic resins. The ink composition contains such binder resins, which tends to reduce carbon dioxide emissions and further improve the quality of recording with the ink composition.

[0053] The binder resin preferably contains one or more resins selected from the group consisting of polyester-based resins and urethane-based resins, and more preferably contains a polyester-based resin.

[0054] Examples of polyester resins include resins having structural units derived from polycarboxylic acids and structural units derived from polyhydric alcohols.

[0055] Examples of the polycarboxylic acid include terephthalic acid, isophthalic acid, orthophthalic acid, phthalic acid, 4,4'-diphenyldicarboxylic acid, 2,5-naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, 2-potassium sulfoterephthalic acid, 5-sodium sulfoisophthalic acid, adipic acid, azelaic acid, sebacic acid, dodecanedicarboxylic acid, glutaric acid, succinic acid, trimellitic acid, trimesic acid, pyromellitic acid, trimellitic anhydride, phthalic anhydride, succinic anhydride, and p-hydroxybenzoic acid, as well as salts thereof. Examples of the salts include potassium salts, sodium salts, calcium salts, and magnesium salts.

[0056] Examples of the polyhydric alcohol include ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, 1,3-propanediol, 1,3-butylene glycol, 1,4-butanediol, 1,6-hexanediol, 2-methyl-1,5-pentanediol, neopentyl glycol, 1,4-cyclohexanedimethanol, p-xylylene glycol, bisphenol A-ethylene glycol adduct, diethylene glycol, triethylene glycol, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, polytetramethylene oxide glycol, dimethylolpropionic acid, glycerin, trimethylolpropane, sodium dimethylolethylsulfonate, potassium dimethylolethylsulfonate, and potassium dimethylolpropionate.

[0057] The sulfonic acid group-containing polyester resin has, for example, a structural unit derived from a polycarboxylic acid, a structural unit derived from a polyhydric alcohol, and a structural unit derived from a sulfonic acid group-containing aromatic monomer. Examples of the sulfonic acid group-containing aromatic monomer include 5-sulfoisophthalic acid, sulfoterephthalic acid, 4-sulfophthalic acid, 4-sulfonaphthalene-2,7-dicarboxylic acid, and 4-sulfo-1,8-naphthalenedicarboxylic anhydride, as well as salts thereof. The salts may be selected from those listed above, with sodium salts being preferred.

[0058] The polyester resin containing these groups allows the polyester resin to react well with a crosslinking agent, preferably a compound containing an isocyanate group, and improves the binding property with a fabric, preferably a fabric containing a fiber having a hydroxyl group, thereby making it possible to obtain a printed textile having a better balance of washing fastness and texture, as well as better color development and dry cleaning resistance.

[0059] The polyester resin can be obtained by, for example, appropriately selecting one or more of the above-mentioned polycarboxylic acids, polyhydric alcohols, and, if necessary, sulfonic acid group-containing aromatic monomers, and synthesizing them through a conventional polycondensation reaction.

[0060] Commercially available polyester resins may also be used, including, for example, Eliteal (registered trademark) KA-5071S, KT-8803, KT-9204, KT-8701, KT-8904, and KT-0507 (all trade names, Unitika Ltd., polyester resin emulsions); Hitec (registered trademark) SN-2002 (trade name, Toho Chemical Industry Co., Ltd., polyester resin emulsion); and Pluscoat (registered trademark). Examples of suitable acrylic acid include Vylonal (registered trademark) Z-221, Z-446, Z-561, Z-565, RZ-570, Z-592, Z-687, Z-690, Z-730, Z-760, RZ-105, RZ-570, and RZ-760 (all trade names, manufactured by GOO Chemical Industry Co., Ltd.); and Vylonal (registered trademark) MD-1200, MD-1500, and MD-2000 (all trade names, manufactured by Toyobo Co., Ltd.). Among these, MD-2000 is preferred from the viewpoint of more effectively and reliably achieving the effects of the present invention.

[0061] Urethane resin is a general term for resins containing urethane bonds. Examples of urethane resins include polyether urethane resins containing ether bonds in the main chain in addition to urethane bonds, polyester urethane resins containing ester bonds in the main chain, and polycarbonate urethane resins containing carbonate bonds in the main chain. Commercially available urethane resins may also be used, such as BKP-N10 (manufactured by Technos Japan Co., Ltd.), Superflex (registered trademark) 460, 460s, 840, and E-4000 (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.), Rezamin (registered trademark) D-1060, D-2020, D-4080, D-4200, D-6300, and D-6455 (manufactured by Dainichiseika Color & Chemicals Mfg. Co., Ltd.), Takelac (registered trademark) W-6061, WS-6021, and W-512-A-6 (manufactured by Mitsui Chemicals, Inc.), Sancure (registered trademark) 2710 (manufactured by Lubrizol), and Permarin (registered trademark) UA-150 (manufactured by Sanyo Chemical Industries, Ltd.). Among these, BKP-N10 is preferred for achieving the effects of the present invention more effectively and reliably.

[0062] Examples of acrylic resins include homopolymers or copolymers of (meth)acrylic acid, (meth)acrylic acid esters, acrylonitrile, cyanoacrylate, acrylamide, olefin, styrene, silicone, rosin, terpene, epoxy, polyester, vinyl acetate, vinyl chloride, vinyl alcohol, vinyl ether, vinylpyrrolidone, vinylpyridine, vinylcarbazole, vinylimidazole, and vinylidene chloride.

[0063] Other commercially available emulsion products include, for example, Vinyblan (registered trademark) 150, 603, 745, and 1245L (manufactured by Nissin Chemical Industry Co., Ltd.), Danfix (registered trademark) MM11 (manufactured by Nissin Chemical Industry Co., Ltd.), Senka Antiflick (registered trademark) CX-2 (manufactured by Senka Co., Ltd.), Mowinyl (registered trademark) 966A (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.), and Microgel (registered trademark) E- 1002, E-5002 (manufactured by Nippon Paint Co., Ltd.), Boncoat (registered trademark) 4001, 5454 (manufactured by DIC Corporation), SAE1014 (manufactured by Zeon Corporation), Saivinol (registered trademark) SK-200 (manufactured by Saiden Chemical Industries, Ltd.), Joncryl (registered trademark) 7100, 390, 711, 511, 7001, 632, 741, 450, 840, 74J, HRC-1645J, 734, 852, 7600, 775, 537J, 1535, PDX-7630A, 352J, 352D, PDX-7145, 538J, 7640, 7641, 631, 790, 780, 7610 (manufactured by BASF), NK Binder R-5HN (manufactured by Shin-Nakamura Chemical Co., Ltd.), Sancure 2710 (manufactured by The Lubrizol Group, Inc.), Parmarin (registered trademark) UA-150 (manufactured by Sanyo Chemical Industries, Ltd.) , Superflex (registered trademark) 460, 470, 610, 700 (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.), NeoRez (registered trademark) R-9660, R-9637, R-940 (manufactured by Kusumoto Chemicals Co., Ltd.), Adeka Bontiter (registered trademark) HUX-380, 290K (manufactured by ADEKA Corporation), Takelac (registered trademark) W-605, W-635, WS-6021 (manufactured by Mitsui Chemicals, Inc.).

[0064] The binder resin may be synthesized by a conventional method.

[0065] The content of the binder resin is preferably 0 to 10% by mass, 0.5 to 8% by mass, or 2 to 6% by mass relative to the total amount of the ink composition. By keeping the content of the binder resin within the above range, carbon dioxide emissions tend to be reduced while the quality of recording with the ink composition tends to be further improved.

[0066] The content of the binder resin, which is one or more types of biomass-derived raw materials, is preferably 0 to 10 mass %, 0.5 to 8 mass %, or 2 to 6 mass %, relative to the total amount of the ink composition. By keeping the content of the binder resin within the above range, carbon dioxide emissions tend to be reduced, while the quality of recording with the ink composition tends to be further improved.

[0067] 1.3.Organic Solvents The ink composition contains one or more organic solvents derived from biomass. Examples of the organic solvent include alkanediols, polyols, glycol ethers, alkanolamine solvents, nitrogen-containing solvents, esters, and cyclic esters. One organic solvent may be used alone, or two or more organic solvents may be used in combination.

[0068] The ink composition is preferably a colored ink composition that contains one or more organic solvents that are one or more types of biomass-derived raw materials, etc., including one or more types of polyols and glycol ethers, and that contains one or more colorants that are one or more types of biomass-derived raw materials, etc. By using such a colored ink composition, there is a tendency for the quality of recording using the ink composition to be further improved while reducing carbon dioxide emissions.

[0069] Examples of alkanediols include 1,2-alkanediols such as ethylene glycol, propylene glycol, 1,2-propanediol, 1,2-butanediol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, 1,3-propanediol, 1,4-butanediol, and 1,6-hexanediol. Alkanediols are excellent in enhancing the wettability of the ink composition to the recording medium, thereby achieving uniform wetting, and in acting as a penetrating solvent for the recording medium. Among these, 1,2-alkanediols are particularly preferred because of their excellent penetrating solvent properties. Furthermore, among the above, 1,2-hexanediol is preferred from the viewpoint of achieving the effects of the present invention more effectively and reliably.

[0070] Examples of polyols include diethylene glycol, triethylene glycol, propylene glycol, 2-ethyl-2-methyl-1,3-propanediol, 2-methyl-2-propyl-1,3-propanediol, 2-methyl-1,3-propanediol, 2,2-dimethyl-1,3-propanediol, 3-methyl-1,3-butanediol, 2-ethyl-1,3-hexanediol, 3-methyl-1,5-pentanediol, 2-methylpentane-2,4-diol, and glycerin. These polyols may be used alone or in combination. Polyols have excellent moisturizing properties. Among these, glycerin, triethylene glycol, and propylene glycol are preferred from the viewpoint of more effectively and reliably achieving the effects of the present invention.

[0071] The glycol ethers may be monoethers or diethers of alkylene glycols, and alkyl ethers are preferred. Specific examples include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, triethylene glycol monobutyl ether, tetraethylene glycol monomethyl ether, tetraethylene glycol monoethyl ether, tetraethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, tripropylene glycol monobutyl ether, and propylene glycol monomethyl ether. and alkylene glycol dialkyl ethers such as ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dibutyl ether, diethylene glycol methyl ethyl ether, diethylene glycol methyl butyl ether, triethylene glycol dimethyl ether, triethylene glycol diethyl ether, triethylene glycol dibutyl ether, triethylene glycol methyl butyl ether, tetraethylene glycol dimethyl ether, tetraethylene glycol diethyl ether, tetraethylene glycol dibutyl ether, propylene glycol dimethyl ether, propylene glycol diethyl ether, dipropylene glycol dimethyl ether, dipropylene glycol diethyl ether, and tripropylene glycol dimethyl ether.These can control the wettability of the ink composition to a recording medium, etc. Among these, triethylene glycol monobutyl ether is preferred from the viewpoint of more effectively and reliably achieving the effects of the present invention.

[0072] Alkanolamine solvents are compounds having an alkane skeleton with a hydroxyl group and an amino group. Examples of alkanolamine solvents include triethanolamine, tripropanolamine, triisopropanolamine, and tributanolamine. Among these, triethanolamine is preferred from the viewpoint of more effectively and reliably achieving the effects of the present invention.

[0073] Examples of nitrogen-containing solvents include N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, N-vinyl-2-pyrrolidone, 2-pyrrolidone, N-butyl-2-pyrrolidone, and 5-methyl-2-pyrrolidone. These can be used alone or in combination of two or more. Nitrogen-containing solvents act as good dissolving agents for resins, enabling printed matter to be obtained with excellent abrasion resistance and preventing clogging of inkjet heads and nozzles.

[0074] Examples of the nitrogen-containing solvent include alkoxyalkylamides, such as 3-methoxy-N,N-dimethylpropionamide, 3-methoxy-N,N-diethylpropionamide, 3-methoxy-N,N-methylethylpropionamide, 3-ethoxy-N,N-dimethylpropionamide, 3-ethoxy-N,N-diethylpropionamide, 3-ethoxy-N,N-methylethylpropionamide, 3-n-butoxy-N,N-dimethylpropionamide, 3-n-butoxy-N,N-diethylpropionamide, 3-n-butoxy-N,N-methylethylpropionamide, 3-n- Examples include propoxy-N,N-dimethylpropionamide, 3-n-propoxy-N,N-diethylpropionamide, 3-n-propoxy-N,N-methylethylpropionamide, 3-iso-propoxy-N,N-dimethylpropionamide, 3-iso-propoxy-N,N-diethylpropionamide, 3-iso-propoxy-N,N-methylethylpropionamide, 3-tert-butoxy-N,N-dimethylpropionamide, 3-tert-butoxy-N,N-diethylpropionamide, and 3-tert-butoxy-N,N-methylethylpropionamide.

[0075] Examples of esters include glycol monoacetates such as ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, diethylene glycol monomethyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, dipropylene glycol monomethyl ether acetate, and methoxybutyl acetate; Examples of the glycol diesters include ethylene glycol diacetate, propylene glycol diacetate, dipropylene glycol diacetate, ethylene glycol acetate propionate, ethylene glycol acetate butyrate, diethylene glycol acetate butyrate, diethylene glycol acetate propionate, diethylene glycol acetate butyrate, propylene glycol acetate propionate, propylene glycol acetate butyrate, dipropylene glycol acetate butyrate, and dipropylene glycol acetate propionate.

[0076] The organic solvent, which is one or more of the biomass-derived raw materials contained in the ink composition, preferably includes one or more selected from the group consisting of glycerin, triethylene glycol, 1,2-hexanediol, and triethylene glycol monobutyl ether. By preparing such an ink composition, carbon dioxide emissions tend to be reduced while the quality of recording using the ink composition is further improved.

[0077] The content of the organic solvent is preferably 1 to 20 mass %, 2 to 18 mass %, 3 to 15 mass %, or 3.5 to 13.5 mass % relative to the total amount of the ink composition. By keeping the content of the organic solvent within the above range, carbon dioxide emissions tend to be reduced, while the quality of recording with the ink composition tends to be further improved.

[0078] The content of the organic solvent, which is one or more types of biomass-derived raw materials, is preferably 1 to 20 mass %, 2 to 18 mass %, 3 to 15 mass %, or 3.5 to 13.5 mass %, relative to the total amount of the ink composition. By keeping the content of the organic solvent within the above range, carbon dioxide emissions tend to be reduced, while the quality of recording with the ink composition tends to be further improved.

[0079] 1.4. Cyclic amide compounds Examples of cyclic amides include lactams, such as pyrrolidones such as 2-pyrrolidone, 1-methyl-2-pyrrolidone, 1-ethyl-2-pyrrolidone, 1-propyl-2-pyrrolidone, and 1-butyl-2-pyrrolidone. From the viewpoint of more effectively and reliably achieving the effects of the present invention, it is preferable to use one or more types of raw materials derived from biomass. As the cyclic amide compound, one type may be used alone, or two or more types may be used in combination.

[0080] The ink composition preferably contains a binder resin that is one or more types of biomass-derived raw materials, etc., and an organic solvent that is one or more types of biomass-derived raw materials, etc., including one or more types of polyols and glycols, or a cyclic amide compound that is one or more types of biomass-derived raw materials, etc. By forming such an ink composition, the amount of carbon dioxide emissions tends to be reduced, while the quality of recording using the ink composition tends to be further improved.

[0081] The content of the cyclic amide compound is preferably 0 to 5 mass %, 0.1 to 3 mass %, or 0.3 to 1 mass %, relative to the total amount of the ink composition. By setting the content of the cyclic amide compound within the above range, the amount of carbon dioxide emissions tends to be reduced, while the quality of recording by the ink composition tends to be further improved.

[0082] 1.5. Metal elements The ink composition may contain a biomass-derived raw material, and therefore may contain a metal element. Examples of the metal element include Ca, Mg, Mn, Fe, Al, Si, Cr, Ni, Sr, and Ba. The metal element may be derived from the biomass-derived raw material, or may be added separately.

[0083] The ink composition preferably contains one or more elements A selected from the group consisting of Ca, Mg, Mn, Fe, Cr, Al, and Zn as metal elements, with the total content of the elements A being 5 to 750 ppm relative to the total amount of the ink composition. By including the metal elements A in the above total content, the ink composition tends to have even better recording quality while reducing carbon dioxide emissions. From the same viewpoint, the total content of the metal elements A is more preferably 10 to 500 ppm, and more preferably 50 to 400 ppm, relative to the total amount of the ink composition.

[0084] The ink composition preferably contains at least one element B selected from Ca and Mg as a metal element, with the total content of element B being 4 to 550 ppm relative to the total amount of the ink composition. By including metal element B in the above total content, the ink composition tends to have better recording quality while reducing carbon dioxide emissions. From the same viewpoint, the total content of metal element B is more preferably 10 to 450 ppm, and more preferably 20 to 300 ppm, relative to the total amount of the ink composition.

[0085] The ink composition preferably contains one or more elements C selected from the group consisting of Mn, Fe, Cr, Al, and Zn as metal elements, and the total content of the elements C is 1 to 200 ppm relative to the total amount of the ink composition. By including the metal elements C in the above total content, the ink composition tends to have even better recording quality while reducing carbon dioxide emissions. From the same viewpoint, the total content of the metal elements C is more preferably 5 to 150 ppm, and more preferably 10 to 100 ppm, relative to the total amount of the ink composition.

[0086] The method for determining the mass of the metal element in the ink composition is not particularly limited, and examples thereof include inductively coupled plasma optical emission spectroscopy (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS).

[0087] Dispersants Examples of dispersants include lignin sulfonates, modified lignin, lecithin, lecithin derivatives, enzyme-treated lecithin, saponin, plant sterols, glycerin fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene glycerin fatty acid esters, sucrose fatty acid esters, sorbitan fatty acid esters, propylene glycol fatty acid esters, and polyoxyethylene alkyl ethers. Among these, lignin sulfonates are preferred from the viewpoint of more effectively and reliably achieving the effects of the present invention. As dispersants, one type may be used alone, or two or more types may be used in combination.

[0088] The weight-average molecular weight of the lignin sulfonate is, for example, from 1,000 to 80,000. From the viewpoint of further improving the storage stability and / or ejection stability of the ink composition, the weight-average molecular weight of the lignin sulfonate is preferably from 3,000 to 70,000, more preferably from 5,000 to 60,000, even more preferably from 10,000 to 50,000, still more preferably from 15,000 to 40,000, and particularly preferably from 20,000 to 35,000.

[0089] The lignin sulfonate or a derivative thereof is not particularly limited, and examples of the product names include Pearlex NP (manufactured by Nippon Paper Industries Co., Ltd.), Pearlex DP (manufactured by Nippon Paper Industries Co., Ltd.), Vanilex N (manufactured by Nippon Paper Industries Co., Ltd.), 471038-100G (manufactured by Sigma-Aldrich), New Calgen WG-4 (manufactured by Takemoto Oil & Fat Co., Ltd.), and Sunex P252 (manufactured by Nippon Paper Industries Co., Ltd.) Among these, Pearlex NP is preferred from the viewpoint of more effectively and reliably achieving the effects of the present invention.

[0090] The content of the dispersant is preferably 0 to 20 mass %, 3 to 10 mass %, or 4 to 8 mass % relative to the total amount of the ink composition. By keeping the content of the dispersant within the above range, carbon dioxide emissions tend to be reduced while the recording quality tends to be even better.

[0091] 1.7.Surfactants Examples of surfactants include nonionic surfactants, cationic surfactants, anionic surfactants, and amphoteric surfactants. Among these, nonionic surfactants are preferred. Furthermore, from the viewpoint of more effectively and reliably achieving the effects of the present invention, it is preferable to use a surfactant that is one or more types of raw materials derived from biomass. One type of surfactant may be used alone, or two or more types may be used in combination.

[0092] The ink composition preferably further contains one or more of cyclic amides and surfactants, which are biomass-derived or recycled materials. By preparing such an ink composition, carbon dioxide emissions tend to be reduced while the recording quality is further improved.

[0093] The nonionic surfactant is not particularly limited, but examples thereof include ethers of polyalkylene oxides, higher aliphatic acid esters, and higher aliphatic amides.

[0094] Here, "higher" means 9 or more carbon atoms, preferably 9 to 30 carbon atoms, and more preferably 12 to 20 carbon atoms. Furthermore, "aliphatic" means non-aromatic, and includes chain aliphatics and cyclic aliphatics. Chain aliphatics may contain carbon-carbon double bonds, but do not contain triple bonds.

[0095] Polyalkylene oxide ethers are substances having an ether bond formed by bonding an aliphatic group, aryl group, or the like to the ether oxygen at the terminal of the polyalkylene oxide skeleton. Polyalkylene oxides are composed of repeating alkylene oxides. Examples of polyalkylene oxides include polyethylene oxide, polypropylene oxide, and combinations thereof. When used in combination, the order of these is not limited and may be random. The average number of moles of alkylene oxide added (n) is not particularly limited, but is preferably 5 to 50, more preferably 10 to 40. The aliphatic group in polyalkylene oxide ethers is preferably a higher aliphatic group. The terms "higher" and "aliphatic" are defined above. The aliphatic group may be branched or linear. The aryl group in polyalkylene oxide ethers is not particularly limited, but examples include polycyclic aryl groups such as phenyl and naphthyl. The aliphatic and aryl groups may be substituted with functional groups such as hydroxyl and ester groups. The polyalkylene oxide ethers may be compounds having a plurality of polyalkylene oxide chains in the molecule, and the number of polyalkylene oxide skeletons in the molecule is preferably 1 to 3.

[0096] The ethers of polyalkylene oxide are not particularly limited, but examples thereof include polyoxyethylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene alkyl glucosides, polyoxyalkylene glycol alkyl ethers, polyoxyalkylene glycol ethers, and polyoxyalkylene glycol alkylphenyl ethers.

[0097] Higher aliphatic acid esters are esters of higher aliphatic acids. The higher aliphatic is as defined above, and may be substituted with, for example, a hydroxyl group or other functional group, or may have a branched structure. The structure of the alcohol residue of higher aliphatic acid esters may be a cyclic or chain organic group, and the number of carbon atoms is preferably 1 to 30, more preferably 2 to 20, and even more preferably 3 to 10. The higher aliphatic acid esters may be a composite type having a polyalkylene oxide skeleton.

[0098] The higher aliphatic acid esters are not particularly limited, but examples thereof include sucrose fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, sorbitan fatty acid esters, and polyoxyalkylene acetylene glycols.

[0099] Higher aliphatic amides are amides of higher aliphatic groups. Higher aliphatic groups are as defined above, and may be substituted with, for example, hydroxyl groups or other functional groups, or may have a branched structure. Higher aliphatic amines or amides may be hybrid types having a polyalkylene oxide backbone.

[0100] The higher aliphatic amides are not particularly limited, but examples thereof include aliphatic alkylamides, fatty acid alkanolamides, and alkylolamides.

[0101] Commercially available nonionic surfactants include, for example, Adekatall TN-40, TN-80, TN-100, LA-675B, LA-775, LA-875, LA-975, LA-1275, and OA-7 (all product names, manufactured by ADEKA Corporation), CL-40, CL-50, CL-70, CL-85, CL-95, CL-100, CL-120, CL-140, CL-160, CL-200, and CL-400 (all product names, manufactured by Sanyo Chemical Industries, Ltd.), Noigen XL-40, -41, -50, -60, -6190, -70, -80, -100, -140, -160, -160S, -400, -400D, and -1000, and Noigen TDS-30, -50, -70, -80, -100, -120, -200D, -500F, Noigen EA-137, -157, -167, -177, -197D, DKS NL-30, -40, -50, -60, -70, -80, -90, -100, -110, -180, -250, Noigen ET-89, -109, -129, -149, -159, -189, Noigen ES-99D, -129D, -149D, -169D, Sorgen TW-20, -60, -80V, -80DK, Ester F-160, -140, -110, -90, -70 (all product names, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), Latemul PD-450, PD-420, PD-430, PD-430S, Rheodor TW-L106, TW-L120, TW-P120, TW-S106V, TW-S120V, TW-S320V, TW-O106V, TW-O120V, TW-O320V, Rheodor 430V, 440V, 460V, Rheodor Super SP-L10, TW-L120, Emanon 1112, 3199V, 4110V, 3299RV, 3299V, Emulgen Examples include 109P, 1020, 123P, 130K, 147, 150, 210P, 220, 306P, 320P, 350, 404, 408, 409PV, 420, 430, 1108, 1118S-70, 1135S-70, 1150S-60, 4085, A-60, A-90, A-500, and B-66 (all product names, manufactured by Kao Corporation), Sorbon T-20, Sorbon S-10E, and Pegnol 24-0 (all product names, manufactured by Toho Chemical Industry Co., Ltd.).As a biomass-derived raw material for the nonionic surfactant, it is preferable to use a bio-based product such as Genapol LA 050 SG Vita.

[0102] The cationic surfactant is not particularly limited, but examples thereof include primary, secondary, and tertiary amine salt compounds, alkylamine salts, dialkylamine salts, aliphatic amine salts, benzalkonium salts, quaternary ammonium salts, quaternary alkylammonium salts, alkylpyridinium salts, sulfonium salts, phosphonium salts, onium salts, imidazolinium salts, etc. Specific examples of the cationic surfactant include hydrochlorides and acetates of laurylamine, coconut amine, rosinamine, etc., lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, benzyltributylammonium chloride, benzalkonium chloride, dimethylethyllaurylammonium ethyl sulfate, dimethylethyloctylammonium ethyl sulfate, trimethyllaurylammonium hydrochloride, cetylpyridinium chloride, cetylpyridinium bromide, dihydroxyethyllaurylamine, decyldimethylbenzylammonium chloride, dodecyldimethylbenzylammonium chloride, tetradecyldimethylammonium chloride, hexadecyldimethylammonium chloride, and octadecyldimethylammonium chloride.

[0103] The anionic surfactant is not particularly limited, but examples thereof include higher fatty acid salts, soaps, α-sulfofatty acid methyl ester salts, linear alkylbenzene sulfonates, alkyl sulfate salts, alkyl ether sulfate salts, monoalkyl phosphate salts, α-olefin sulfonates, alkylbenzene sulfonates, alkylnaphthalene sulfonates, naphthalene sulfonates, alkanesulfonates, polyoxyethylene alkyl ether sulfate salts, sulfosuccinates, and polyoxyalkylene glycol alkyl ether phosphate salts.

[0104] The amphoteric surfactant is not particularly limited, but examples thereof include amino acid-based alkylamino fatty acid salts, betaine-based alkylcarboxyl betaines, and amine oxide-based alkylamine oxides.

[0105] The content of the surfactant is preferably 0 to 3 mass %, 0.01 to 2 mass %, or 0.05 to 1 mass %, relative to the total amount of the ink composition. By keeping the content of the surfactant within the above range, the recording quality of the ink composition tends to be maintained while reducing carbon dioxide emissions.

[0106] 1.8.Water The ink composition of this embodiment is a water-based ink composition containing water. The water-based ink composition is an ink composition that contains at least water as the main solvent component of the ink.

[0107] The water content is preferably 50 to 98% by mass or less based on the total amount of the ink, The water content is 60 to 95% by mass, and 70 to 92% by mass. When the water content is within the above range, the storage stability tends to be excellent.

[0108] 1.9.Other Ingredients The ink composition may contain components other than those described above, such as a dissolution aid, a viscosity adjuster, a pH adjuster, an antioxidant, a preservative, an antifungal agent, a corrosion inhibitor, and a chelating agent for capturing metal ions that affect dispersion.

[0109] The ink composition may contain a chelating agent as needed. The ink composition containing a chelating agent tends to have excellent storage stability. From the viewpoint of more effectively and reliably achieving the effects of the present invention, it is preferable to use one or more raw materials derived from biomass. The chelating agent is not particularly limited, and examples thereof include ethylenediaminetetraacetate, edetate di-salt, pyrophosphate, hexametaphosphate, citric acid, tartaric acid, gluconic acid, and the like. One type of chelating agent may be used alone, or two or more types may be used in combination.

[0110] The ink composition may contain a pH adjuster as needed. Examples of pH adjusters include inorganic acids (e.g., sulfuric acid, hydrochloric acid, nitric acid, etc.), inorganic bases (e.g., lithium hydroxide, sodium hydroxide, potassium hydroxide, ammonia, etc.), and organic acids (e.g., adipic acid, citric acid, succinic acid, etc.). From the viewpoint of more effectively and reliably achieving the effects of the present invention, it is preferable to use one or more types of raw materials derived from biomass. Note that one type of pH adjuster may be used alone, or two or more types may be used in combination.

[0111] The ink composition may contain a preservative, if necessary. Examples of preservatives include sodium benzoate, sodium pentachlorophenol, sodium 2-pyridinethiol-1-oxide, sodium sorbate, sodium dehydroacetate, 1,2-dibenzisothiazolin-3-one, and 4-chloro-3-methylphenol (such as Preventol CMK from Bayer). From the viewpoint of more effectively and reliably achieving the effects of the present invention, it is preferable to use one or more types of raw materials derived from biomass. Note that the preservatives may be used alone or in combination of two or more types.

[0112] The content of each of the above other components is preferably 0 to 10% by mass, 0 to 5% by mass or less, and 0 to 3% by mass, relative to the total amount of the ink composition.

[0113] 2. Inkjet recording method The inkjet recording method according to this embodiment includes a step of ejecting the inkjet ink composition from a predetermined inkjet head and depositing the ink onto a recording medium. The inkjet recording method may further include a step of transporting the recording medium, and the depositing step and the transporting step may be performed simultaneously.

[0114] 3. Inkjet recording device The inkjet recording apparatus of the present embodiment includes the ink composition described above and an inkjet head having a nozzle that ejects the ink composition onto a recording medium, and preferably further includes a supply flow path that distributes the ink composition and is connected to the inkjet head, and a filter unit provided in the supply flow path of the inkjet head.

[0115] An example of an inkjet recording apparatus that can be used in this embodiment is shown in Figure 2. The inkjet recording apparatus according to this embodiment will be described in further detail with reference to Figure 2. In the XYZ coordinate system shown in Figure 2, the X direction indicates the length direction of the recording medium, the Y direction indicates the width direction of the recording medium in the transport path within the recording apparatus, and the Z direction indicates the height direction of the apparatus.

[0116] As an example, the recording device 10 is a line-type inkjet printer capable of high-speed, high-density printing. The recording device 10 includes a feed unit 12 that stores recording media P such as paper, a conveyance unit 14, a belt conveyance unit 16, a recording unit 8, an Fd (face-down) discharge unit 20 as an "discharge unit," an Fd (face-down) placement unit 22 as a "placement unit," a reversing path unit 24 as a "reversing conveyance mechanism," an Fu (face-up) discharge unit 26, and an Fu (face-up) placement unit 28.

[0117] The feeding unit 12 is disposed at the bottom of the recording device 10. The feeding unit 12 includes a feeding tray 30 that stores recording media P, and a feeding roller 32 that sends out the recording media P stored in the feeding tray 30 to the transport path 11.

[0118] The recording medium P stored in the feed tray 30 is fed by a feed roller 32 along the conveying path 11 to the conveying unit 14. The conveying unit 14 includes a conveying drive roller 34 and a conveying driven roller 36. The conveying drive roller 34 is driven to rotate by a drive source (not shown). In the conveying unit 14, the recording medium P is nipped between the conveying drive roller 34 and the conveying driven roller 36 and conveyed to the belt conveying unit 16 located downstream of the conveying path 11.

[0119] The belt conveying section 16 includes a first roller 38 located upstream on the conveying path 11, a second roller 40 located downstream, an endless belt 42 rotatably attached to the first roller 38 and the second roller 40, and a support 44 that supports the upper section 42a of the endless belt 42 between the first roller 38 and the second roller 40.

[0120] The endless belt 42 is driven by the first roller 38 or the second roller 40, which is driven by a drive source (not shown), so as to move from the +X direction to the −X direction in the upper section 42a. Therefore, the recording medium P conveyed from the conveying unit 14 is further conveyed downstream of the conveying path 11 in the belt conveying unit 16.

[0121] The recording unit 8 includes a line-type inkjet head 48 and a head holder 46 that holds the inkjet head 48. The recording unit 8 may also be a serial type in which the inkjet head is mounted on a carriage that moves back and forth in the Y-axis direction. The inkjet head 48 is disposed so as to face the upper section 42a of the endless belt 42 that is supported by a support 44. The inkjet head 48 ejects ink toward the recording medium P as the recording medium P is transported in the upper section 42a of the endless belt 42, thereby performing recording. The recording medium P is transported downstream of the transport path 11 by the belt transport unit 16 while recording is being performed.

[0122] A first branching section 50 is provided downstream of the conveying path 11 of the belt conveying unit 16. The first branching section 50 is configured to be switchable between the conveying path 11 that conveys the recording medium P to the Fd discharge unit 20 or the Fu discharge unit 26 and a reversing path 52 of the reversing path unit 24 that reverses the recorded side of the recording medium P and conveys the recording medium P again to the recording unit 8. The recording medium P that is switched to the reversing path 52 by the first branching section 50 and conveyed has its recorded side reversed during the conveying process on the reversing path 52, and is conveyed again to the recording unit 8 so that the side opposite to the initially recorded side faces the inkjet head 48.

[0123] A second branch section 54 is further provided downstream of the first branch section 50 along the conveying path 11. The second branch section 54 is configured to be able to switch the conveying direction of the recording medium P so that the recording medium P is conveyed toward the Fd discharge section 20 or the recording medium P is conveyed toward the Fu discharge section 26.

[0124] The recording medium P transported from the second branching section 54 toward the Fd discharge section 20 is discharged from the Fd discharge section 20 and placed on the Fd placement section 22. At this time, the recording medium P is placed so that the recorded surface faces the Fd placement section 22. Also, the recording medium P transported from the second branching section 54 toward the Fu discharge section 26 is discharged from the Fu discharge section 26 and placed on the Fu placement section 28. At this time, the recording medium P is placed so that the recorded surface faces away from the Fu placement section 28.

[0125] 4. Recording Media The recording medium used in this embodiment is not particularly limited, and examples thereof include absorbent recording media, low absorbent recording media, and non-absorbent recording media, with absorbent recording media being preferred.

[0126] Examples of absorbent recording media include plain paper such as electrophotographic paper, which has high ink permeability, and inkjet paper (paper specifically for inkjet printing, which has an ink absorbing layer made of silica particles or alumina particles, or an ink absorbing layer made of a hydrophilic polymer such as polyvinyl alcohol (PVA) or polyvinylpyrrolidone (PVP)), as well as art paper, coated paper, and cast paper, which are used in general offset printing and have relatively low ink permeability.

[0127] Examples of low-absorbency recording media and non-absorbency recording media include films and plates of plastics such as polyvinyl chloride, polyethylene, polypropylene, polyethylene terephthalate (PET), polycarbonate, polystyrene, polyurethane, etc.; plates of metals such as iron, silver, copper, aluminum, etc.; or metal plates and plastic films manufactured by vapor deposition of these various metals, and alloy plates such as stainless steel and brass; and recording media in which a plastic film such as polyvinyl chloride, polyethylene, polypropylene, polyethylene terephthalate (PET), polycarbonate, polystyrene, polyurethane, etc. is adhered (coated) to a paper substrate.

[0128] 5. Recordings The recorded matter of this embodiment is obtained by applying the ink composition described above to a recording medium. The recorded matter of this embodiment using the ink composition described above is excellent in recording quality while reducing carbon dioxide emissions, and is therefore an excellent sustainable environmentally friendly measure. [Example]

[0129] The present invention will be described in more detail below using examples and comparative examples, but the present invention is not limited to the following examples.

[0130] In FIG. 1, Table 1 shows the composition of each ink composition of the examples and comparative examples and the evaluation results thereof.

[0131] 1. Preparation of Ink Composition Each component was placed in a mixing tank, mixed and stirred, and filtered through a membrane filter to obtain the inkjet ink composition shown in Table 1. The numerical values ​​for each component shown in each example in the table represent % by mass unless otherwise specified. In addition, the solid content in the table represents % by mass of the solid content.

[0132] The abbreviations and product ingredients used in Table 1 are detailed below, with "B-" meaning that the material is made from biomass-derived raw materials and "R-" meaning that the material is made from recycled materials. Products described as mass balance products are those manufactured using the mass balance method. [Colorant] B-Bk Binchotan (fine powdered binchotan, manufactured by Kiriya Chemical Co., Ltd.) B-Bk CB (PRINTEX Nature, manufactured by Orion Engineered Carbons Co., Ltd.) BC Indigo (indigo dye, manufactured by Hilcos Co., Ltd.) Bk CB (Carbon Black #30B, manufactured by Mitsubishi Chemical Corporation) C Indigo (indigo dye, manufactured by JADECHEM Co., Ltd.)

[0133] <Surface treatment of pigments> 20 g of each pigment was mixed with 150 g of ion-exchanged water and heated to 50°C while stirring with a dissolver. Next, 222 g of aqueous sodium hypochlorite solution (12% available chlorine concentration) was added dropwise over 3.5 hours at a temperature of 50-60°C. Immediately thereafter, 3 mm diameter glass beads were added and the mixture was stirred at 50°C for 30 minutes to obtain a reaction liquid containing surface-modified carbon black. This reaction liquid was filtered through a 400-mesh wire mesh to separate the glass beads, unreacted carbon black, and the reaction liquid. A 5% aqueous sodium hydroxide solution was added to the separated reaction liquid to adjust the pH to 7.5, followed by desalting and purification using an ultrafiltration membrane. The resulting concentrate was further concentrated to a pigment concentration of 17% to obtain a concentrate. The resulting concentrate was centrifuged to remove coarse particles and then filtered through a 0.6 μm filter. Ion-exchanged water was added to the filtrate to prepare a pigment dispersion with a pigment content of 10%, which was then used to produce an ink composition.

[0134] [Binder resin] B-Polyester (Biomass Vylonal MD-2000, manufactured by Toyobo MC Co., Ltd.) R-Polyester (Recycled Vylonal MD-2000, manufactured by Toyobo MC Co., Ltd.) B-urethane (biomass BKP-N10, manufactured by Technos Japan Co., Ltd.) Polyester (Vylonal MD-2000, manufactured by Toyobo MC Co., Ltd.) Urethane (BKP-N10, manufactured by Technos Japan Co., Ltd.) [Dispersant] B-Lignosulfonic acid sodium (Biomass Pearlex NP, manufactured by Nippon Paper Industries Co., Ltd.) [Surfactants] β-Lauryl alcohol ethoxylate (biomass Genapol LA 050 SG Vita, Clariant) Lauryl alcohol ethoxylate (ADEKA Toll LA-975, manufactured by ADEKA Corporation) [Polyols and glycol ether solvents] B-glycerin (vegetable glycerin, manufactured by NOF Corporation) B-TEG (biomass triethylene glycol, manufactured by Nippon Refine Co., Ltd.) B-BTG (biomass triethylene glycol monobutyl ether, mass balance product) B-PG (Bio-Propylene Glycol, manufactured by OLEON Co., Ltd.) Glycerin (Glycerin, manufactured by Kanto Chemical Co., Ltd.) TEG (triethylene glycol, manufactured by Nippon Shokubai Co., Ltd.) BTG (triethylene glycol monobutyl ether, manufactured by Nippon Nyukazai Co., Ltd.) PG (propylene glycol, manufactured by Kanto Chemical Co., Ltd.) [Polyhydric alcohol solvent] B-1.2-HD (biomass 1,2-hexanediol, manufactured by Toyo Gosei Co., Ltd.) 1.2-HD (1,2-hexanediol, manufactured by Toyo Gosei Co., Ltd.) [Alkanolamine solvents] B-TEA (biomass triethanolamine, mass balance product) TEA (triethanolamine, manufactured by Nippon Shokubai Co., Ltd.) [Cyclic amide compounds] R-ε-caprolactam (recycled ε-caprolactam, manufactured by Toray Industries, Inc.) ε-caprolactam (ε-caprolactam, manufactured by Toray Industries, Inc.) [water] ·Pure water

[0135] In the above, B-BTG is synthesized using bio-derived butanol, and B-TEA is obtained by pyrolyzing biomass naphtha to obtain ethylene, oxidizing the ethylene to obtain ethylene oxide, and synthesizing ethylene oxide and ammonia.

[0136] 2. Evaluation Method 2.1. Redispersibility The ink compositions immediately after preparation were placed in sealed glass containers and allowed to stand at 60°C for 5 days. The average particle diameters (D50) of these ink compositions were then measured and compared with the average particle diameter of the ink composition immediately after preparation. A particle size distribution analyzer (ELSZ-1000, manufactured by Otsuka Electronics Co., Ltd.) was used to measure the particle diameters. The average particle diameter in the ink was interpreted as being due to colorant particles and was treated in the same manner as the average particle diameter of the colorant. (Evaluation criteria) A: The viscosity change rate was less than 10% B: The rate of change in viscosity was 10% or more but less than 20% C: The viscosity change rate was 20% or more but less than 30% D: The viscosity change rate was 30% or more.

[0137] 2.2. Storage stability The ink compositions immediately after preparation were placed in a sealed glass container and left to stand at 60°C for 5 days, after which the viscosities of these ink compositions were measured and compared with the viscosity of the ink composition immediately after preparation. The viscosity was measured using a rheometer (trade name "MCR-306", manufactured by Anton Paar) at 25°C and a shear rate of 10 [s -1 ] to 1000[s -1 The viscosity was measured by increasing the shear rate to 200. The evaluation criteria were as follows: (Evaluation criteria) A: The viscosity change rate was less than 10% B: The rate of change in viscosity was 10% or more but less than 20% C: The viscosity change rate was 20% or more but less than 30% D: The viscosity change rate was 30% or more.

[0138] 2.3.Discharge stability Each ink composition was filled into an ink cartridge of a recording device (PX-H6000, manufactured by Seiko Epson Corporation), and a solid pattern was printed on an A4 size sheet at a resolution of 1440 dpi horizontally and 720 dpi vertically at a duty of 100%. After printing 50 sheets in succession, the number of nozzle clogs was counted. In this specification, "Duty" is a value calculated by the following formula. Duty (%) = Actual print dot count / (vertical resolution x horizontal resolution) x 100 (In the formula, "number of dots when printing" is the number of dots when printing per unit area, and "vertical resolution" and "horizontal resolution" are the resolutions per unit area. Also, "Duty 100%" means the maximum ink weight of a single color per unit pixel. (Evaluation criteria) A: There were 9 or fewer nozzles missing. B: 10 or more but 19 or less nozzles were missing C: Nozzle missing was 20 or more and 29 or less D: 30 or more nozzles were missing

[0139] 2.4.Color development Each of the prepared ink compositions was filled into an ink cartridge for an inkjet printer "PX-S840" (product name, manufactured by Seiko Epson Corporation). As a recording medium, A4 size (210 mm x 297 mm) copy paper "Xerox P Paper" (product name, manufactured by Fuji Xerox Co., Ltd., basis weight 64 g / m 2 A sheet of paper (88 μm thick) was prepared. A solid pattern was printed on the recording medium at a print duty of 100%. After printing, the optical density (hereinafter also referred to as "OD value") was measured using a colorimeter "Xrite i1" (product name, manufactured by Xrite Corporation), and the color development was evaluated according to the following evaluation criteria. (Evaluation criteria) A: The maximum OD value is 1.0 or more. B: The maximum OD value is 0.8 or more and less than 1.0 C: The maximum OD value is 0.6 or more and less than 0.8. D: The maximum OD value is less than 0.6.

[0140] 2.5.Metal element content Mass analysis of each metal component in the ink was performed using an ICP-OES (G8015AA, Agilent Technologies, Inc.). The total content of each of the elements classified as metal elements A, B, and C was calculated and is shown in Table 1.

[0141] 2.6. Substitution rate from fossil fuels In the ink composition, the substitution rate (S), which is the rate at which fossil fuel-derived materials are replaced with biomass-derived raw materials or recycled materials, was calculated using the following formula (1) and evaluated according to the following evaluation criteria. Here, biomass-derived raw materials and recycled materials were considered to be biomass-derived raw materials or recycled materials if at least one of the materials used in their production was biomass-derived or recycled. S [%] = Biomass-derived raw materials and recycled materials [g] / Total mass of components other than water in the ink composition [g] × 100 (1) (Evaluation criteria) A: 100% B: 65% or more but less than 100% C: Less than 65%

[0142] 3. Evaluation Results The composition of the ink used in each example and the evaluation results are shown in Table 1. Table 1 shows that when recording is performed using an aqueous inkjet ink composition containing a colorant that is one or more of biomass-derived raw materials and recycled materials, or a binder resin that is one or more of biomass-derived raw materials and recycled materials, and an organic solvent that is one or more of biomass-derived raw materials and recycled materials, good recording quality can be obtained while reducing carbon dioxide emissions. [Explanation of symbols]

[0143] 10...recording device, 11...transport path, 12...feed section, 14...transport section, 16...belt transport section, 18...recording section, 20...Fd discharge section, 22...Fd placement section, 24...reversal path section, 26...Fu discharge section, 28...Fu placement section, 30...feed tray, 32...feed roller, 34...transport drive roller, 36...transport driven roller, 38...first roller, 40...second roller, 42...endless belt, 42a...upper section of endless belt, 44...support, 46...head holder, 48...inkjet head, 50...first branch section, 52...reversal path, 54...second branch section, 56...discharge roller pair, 64...discharge drive roller, 68...drive shaft, 76...placement surface, 78...convex section, 80...first urging member, 82...second urging member, 84, 86...support shaft, P...recording medium.

Claims

1. a coloring material that is one or more of a biomass-derived raw material and a recycled material, or a binder resin that is one or more of a biomass-derived raw material and a recycled material; and an organic solvent that is one or more of a biomass-derived raw material and a recycled material, Aqueous inkjet ink compositions.

2. the colorant or the binder resin is one or more of a biomass-derived raw material and a recycled material based on separation management, The organic solvent is at least one of a biomass-derived raw material based on a mass balance method and a recycled material. The water-based ink-jet ink composition of claim 1 .

3. the organic solvent includes at least one of polyols and glycol ethers, a colored ink composition containing the colorant, The water-based ink-jet ink composition of claim 1 .

4. a colored ink composition containing the colorant, The colorant is a surface-treated pigment or a resin-dispersed pigment. The water-based ink-jet ink composition of claim 1 .

5. The coloring material is a black ink containing vegetable charcoal or a chromatic ink containing a coloring material other than vegetable charcoal. The water-based ink-jet ink composition of claim 1 .

6. The black ink contains carbon black, which is a recycled material, as the coloring material. The water-based ink-jet ink composition of claim 1 .

7. Contains the colorant, the colorant has a Color Index number; Yellow ink, magenta ink, or cyan ink, The water-based ink-jet ink composition of claim 1 .

8. the binder resin; and the organic solvent or cyclic amide compound containing one or more of polyols and glycols. The water-based ink-jet ink composition of claim 1 .

9. Contains the binder resin, The binder resin includes at least one resin selected from the group consisting of a polyester resin, a polyurethane resin, and an acrylic resin. The water-based ink-jet ink composition of claim 1 .

10. the organic solvent includes one or more selected from the group consisting of glycerin, triethylene glycol, 1,2-hexanediol, and triethylene glycol monobutyl ether; The water-based ink-jet ink composition of claim 1 .

11. Further containing one or more of cyclic amides and surfactants, which are biomass-derived raw materials or recycled materials, The water-based ink-jet ink composition of claim 1 .

12. Contains one or more elements A selected from the group consisting of Ca, Mg, Mn, Fe, Cr, Al, and Zn; the total content of the element A is 10 to 500 ppm relative to the total amount of the water-based inkjet ink composition; The water-based ink-jet ink composition of claim 1 .

13. Contains one or more elements B selected from Ca and Mg, the total content of the element B is 10 to 450 ppm relative to the total amount of the water-based inkjet ink composition; The water-based ink-jet ink composition of claim 1 .

14. Contains one or more elements C selected from the group consisting of Mn, Fe, Cr, Al, and Zn; the total content of the element C is 5 to 150 ppm relative to the total amount of the water-based inkjet ink composition; The water-based ink-jet ink composition of claim 1 .

15. A method comprising a step of ejecting the water-based inkjet ink composition according to any one of claims 1 to 14 from an inkjet head and depositing it on a recording medium. Inkjet recording method.

16. The water-based inkjet ink composition according to any one of claims 1 to 14, an inkjet head having a nozzle for ejecting the water-based inkjet ink composition onto a recording medium, Inkjet recording device.

17. a supply flow path through which the aqueous inkjet ink composition flows and which is connected to the inkjet head; a filter unit provided in the supply flow path of the inkjet head, The inkjet recording apparatus according to claim 16.

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