Inkjet composition ink assembly, inkjet recording method and inkjet recording device

Abstract

An inkjet composition assembly, an inkjet recording method, and an inkjet recording apparatus are provided, all exhibiting excellent wet rubbing fastness and the texture of the recorded material. The inkjet composition assembly comprises a processing liquid composition and a first ink composition, wherein the processing liquid composition contains an acid and water as a coagulant to coagulate components in the first ink composition, and the first ink composition contains a crosslinking agent having crosslinking groups and / or resin particles having crosslinking groups, an alkali, and water.

Description

Technical Field

[0001] This invention relates to an inkjet ink composition, an inkjet recording method, and an inkjet recording apparatus. Background Technology

[0002] Inkjet recording methods, capable of recording high-resolution images with relatively simple devices, have seen rapid development in various aspects. Among these, various studies have been conducted on inkjet recording methods for fabrics. For example, Patent Document 1 describes a transparent ink composition for inkjet printing, aimed at providing a transparent ink composition for inkjet printing that improves rubbing fastness without damaging the texture of the fabric. This transparent ink composition contains resin particles, a lubricant, and water, wherein the resin particles are urethane resin with crosslinking groups, and the dried coating of the transparent ink composition has a Young's modulus of 5–70 MPa.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent document 1: Japanese Patent Application Publication No. 2019-157071.

[0006] Research has been conducted on improving the friction fastness of recorded materials, starting with the inkjet composition described in Patent Document 1. Summary of the Invention

[0007] The inkjet composition of the present invention comprises a processing liquid composition and a first ink composition, wherein the processing liquid composition contains an acid and water as a coagulant for coagulating the components in the first ink composition, and the first ink composition contains a crosslinking agent having crosslinking groups and / or resin particles having crosslinking groups, an alkali, and water.

[0008] The inkjet recording method of the present invention includes: a treatment liquid adhesion step, wherein a treatment liquid composition is ejected by an inkjet method to adhere to a fabric; and a first ink adhesion step, wherein a first ink composition is ejected by an inkjet method to adhere to a fabric, wherein the treatment liquid composition comprises an acid and water as a coagulant for coagulating the components in the first ink composition, and the first ink composition comprises a crosslinking agent having crosslinking groups and / or resin particles having crosslinking groups, an alkali, and water.

[0009] The inkjet recording apparatus of the present invention comprises: an inkjet head that ejects liquid by inkjet method and adheres it to a fabric; and a control unit that controls the ejection of the liquid, wherein the control unit performs: a treatment liquid adhesion step, ejecting a treatment liquid composition by inkjet method and adhering it to the fabric; and a first ink adhesion step, ejecting a first ink composition by inkjet method and adhering it to the fabric, wherein the treatment liquid composition comprises an acid and water as a coagulant for coagulating components in the first ink composition, and the first ink composition comprises a crosslinking agent having crosslinking groups and / or resin particles having crosslinking groups, an alkali, and water. Attached Figure Description

[0010] Figure 1 An example of the recording device used in this embodiment is shown.

[0011] Figure 2 Table 1 shows the components of the treatment liquid used in the examples.

[0012] Figure 3 Table 2 shows the components of the ink compositions used in the examples.

[0013] Figure 4 Table 3 shows the components of the ink compositions used in the examples.

[0014] Figure 5 Table 4 shows the components of the inkjet composition used in the examples and their evaluation results.

[0015] Figure 6 Table 5 shows the components of the inkjet composition used in the examples and their evaluation results.

[0016] Figure 7 Table 6 shows the components of the inkjet composition used in the examples and their evaluation results.

[0017] Figure 8 Table 7 shows the components of the inkjet composition used in the examples and their evaluation results.

[0018] Explanation of reference numerals in the attached figures

[0019] 1: Recording device; 2: Inkjet head; 3: Carriage; P: Recording medium; 4: Carriage moving mechanism; 5: Media delivery mechanism; 6: Control unit; 10: Ink receiving unit; 20: Ink supply pipe. Detailed Implementation

[0020] The following is an appendix as needed. Figure 1 The embodiments of the present invention (hereinafter referred to as "the present embodiments") will be described in detail, but the present invention is not limited thereto and various modifications are possible without departing from its spirit.

[0021] 1. Inkjet composition

[0022] The inkjet composition of this embodiment includes a processing liquid composition and a first ink composition. The processing liquid composition contains an acid and water as a coagulant to coagulate the components in the first ink composition. The first ink composition contains a crosslinking agent having crosslinking groups (hereinafter referred to as "crosslinking agent") and / or resin particles having crosslinking groups (hereinafter referred to as "crosslinking resin particles"), an alkali, and water.

[0023] By including crosslinking agents or crosslinking resin particles in the ink composition, the wet rubbing fastness of the recorded material can be improved. However, when conventional treatment liquid compositions containing polyvalent metal salts as coagulants are used in combination with ink compositions containing crosslinking agents or crosslinking resin particles, polyvalent metal ions interact with functional groups such as carboxyl groups to form bonds. Due to the steric hindrance of these bonds, the crosslinking reaction of the crosslinking agents or crosslinking resin particles is hindered, reducing the effect of improving wet rubbing fastness. The use of monovalent metal salts as coagulants has also been considered, but monovalent metal salts reduce cohesive strength and decrease the color development of the obtained recorded material. Therefore, it is difficult to use metal salts to improve wet rubbing fastness. In addition, it is speculated that when the ink composition contains crosslinking agents or crosslinking resin particles, the aforementioned bonds are formed between them and conventional coagulants such as polyvalent metal salts. This effect can sometimes make the coating of the ink composition harder, resulting in a deterioration in the texture of the recorded material.

[0024] In contrast, this embodiment uses a treatment liquid composition containing an acid as a coagulant. The acid interacts with the functional groups in the crosslinking agent or crosslinking resin particles in a multivalent manner, or it can cause the ink composition to coagulate without hindering the crosslinking reaction, thus improving wet rubbing fastness and texture.

[0025] The components of the inkjet composition in this embodiment will be described in detail below.

[0026] 1.1. First ink composition

[0027] The first ink composition in this embodiment comprises a crosslinking agent having crosslinking groups and / or resin particles having crosslinking groups, an alkali, and water. By having a crosslinking agent or resin particles having crosslinking groups in the first ink composition, a crosslinking reaction occurs on the recording medium, thereby improving the wet rubbing fastness of the obtained coating film.

[0028] 1.1.1. Resin particles

[0029] In this embodiment, the resin particles are particles containing resin, and can be either in emulsion form or powder form. From the viewpoint of suppressing the viscosity increase of the first ink composition, it is preferable to use resin particles in an emulsion form.

[0030] As for resin particles, there are no particular limitations, but examples include urethane resins, acrylic resins (including styrene acrylic resins), fluorene resins, polyolefin resins, rosin-modified resins, terpene resins, polyester resins, polyamide resins, epoxy resins, vinyl chloride resins, vinyl chloride-vinyl acetate copolymers, and ethylene vinyl acetate resins, etc.

[0031] 1.1.1.1. Resin particles with crosslinking groups

[0032] In this embodiment, the first ink composition preferably comprises resin particles having crosslinking groups. In this embodiment, a crosslinking group refers to a group capable of forming a crosslinked structure through a reaction. It can also be a group that forms a crosslinked structure by reacting with each other, such as groups that form a crosslinked structure by reacting with functional groups different from the crosslinking groups. There are no particular limitations on the crosslinking group, but examples include oxazoline groups, carbodiimide groups, isocyanate groups, terminal isocyanate groups, silanol groups, amide groups, and hydrazide groups. Among these, oxazoline groups, carbodiimide groups, and terminal isocyanate groups are preferred. Using these resin particles with crosslinking groups tends to improve wet rubbing fastness and texture. These resin particles with crosslinking groups can be used alone or in combination of two or more.

[0033] There are no particular limitations on the method for obtaining resin particles with crosslinking groups. They can be obtained by polymerization of monomers with crosslinking groups, by polymerization reactions accompanying the formation of crosslinking groups, or by reacting a crosslinking agent with the resin particles. Furthermore, commercially available resin particles with crosslinking groups can also be used.

[0034] The terminated isocyanate group is a functional group formed by chemically protecting the isocyanate group with a terminating agent or the like. Commercially available resin particles containing terminated isocyanate groups include, for example, TAKELAC WS-5984 (manufactured by Mitsui Chemicals) and ETERNACOLL UW-1501F (manufactured by UBE Corporation).

[0035] The silanol group is not particularly limited, but examples include triethoxysilyl, trimethoxysilyl, and tri(2-methoxyethoxy)silyl groups. Commercially available resin particles containing silanol groups include, for example, TAKELAC WS-4022 (a trade name manufactured by Mitsui Chemicals Co., Ltd.).

[0036] The content of resin particles with crosslinking groups in the first ink composition is preferably 1-15% by mass, 3-12% by mass, 3-11% by mass, 5-10% by mass, or 6-10% by mass relative to the total amount of the first ink composition. By keeping the content of resin particles with crosslinking groups within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0037] 1.1.1.2. Resin particles without crosslinking groups

[0038] The first ink composition in this embodiment may comprise resin particles that do not have crosslinking groups. Examples of resin particles that do not have crosslinking groups include polyolefin resins such as polyethylene and polypropylene; polyvinyl chloride resins; non-crosslinked polyurethane resins; polyester resins; and silicone resins. Commercially available non-crosslinked polyurethane resins include, for example, HYDRAN WLS-213 (a non-crosslinked polyurethane resin, trade name manufactured by DIC). These resin particles that do not have crosslinking groups may be used alone or in combination of two or more.

[0039] The content of resin particles without crosslinking groups in the first ink composition is preferably 1 to 15% by mass, 3 to 12% by mass, 3 to 11% by mass, 5 to 10% by mass, and 6 to 9.5% by mass relative to the total amount of the first ink composition. By keeping the content of resin particles with crosslinking groups within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0040] 1.1.2. Crosslinking agents with crosslinking groups

[0041] In this embodiment, the first ink composition preferably includes a crosslinking agent having crosslinking groups. The crosslinking agent having crosslinking groups in this embodiment is not particularly limited, but examples include isocyanate-based crosslinking agents, terminal isocyanate-based crosslinking agents, oxazoline-based crosslinking agents, aziridine-based crosslinking agents, dihydrazide-based crosslinking agents, and carbodiimide-based crosslinking agents. Preferably, these crosslinking agents include one or more selected from the group consisting of oxazoline-based crosslinking agents, carbodiimide-based crosslinking agents, and terminal isocyanate-based crosslinking agents. Using these crosslinking agents tends to improve wet rubbing fastness and texture. These crosslinking agents can be used alone or in combination of two or more.

[0042] End-capped isocyanate crosslinking agents are compounds formed by chemically protecting isocyanate groups with end-capping agents or the like. As end-capped isocyanate crosslinking agents, crosslinking agents formed by reacting aliphatic polyisocyanates, alicyclic polyisocyanates, aromatic aliphatic polyisocyanates, and aromatic polyisocyanates with end-capping agents can be used. Commercially available products can be used as end-capped isocyanate crosslinking agents; for example, MEIKANATE TP-10 (manufactured by Meisei Chemical Industry Co., Ltd.) is a commercially available product.

[0043] There are no particular limitations on oxazoline-based crosslinking agents, but examples include polymers homopolymerized from olefinic unsaturated monomers containing oxazoline groups, such as 2-isopropenyl-2-oxazoline and 2-vinyl-2-oxazoline, as well as polymers copolymerized from the aforementioned unsaturated monomers with other unsaturated monomers. Commercially available oxazoline-based crosslinking agents can be used, such as EPOCROS WS-700, EPOCROS K-2010E, EPOCROS K-2020E, and EPOCROS K-2035E (trade names manufactured by Nippon Shokubai Co., Ltd.).

[0044] There are no particular limitations on the use of carbodiimide-based crosslinking agents, but compounds containing two or more carbodiimide groups in one molecule can be listed as examples. Commercially available products can be used as carbodiimide-based crosslinking agents, such as CARBODILITE E-02 and CARBODILITE E-05 (trade names manufactured by Nisshinbo Chemical Co., Ltd.).

[0045] The content of the crosslinking agent relative to the total amount of the first ink composition is preferably 0.1 to 15% by mass, 0.3 to 10% by mass, 0.5 to 5% by mass, 1 to 4% by mass, and 1.5 to 3.5% by mass. By keeping the content of the crosslinking agent within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0046] 1.1.3. Color materials

[0047] The first ink composition in this embodiment contains a colorant, and the content of the colorant is greater than 0.1% relative to the total amount of the first ink composition, thus it can be colored. Since the first ink composition is a colored ink containing a colorant, it can be used as an inkjet composition group with a smaller coating amount in a simpler process without the need for further use of other ink compositions.

[0048] The colorant used in this embodiment is not particularly limited, but pigments and dyes are examples, with pigments being preferred. The inclusion of pigments in the first ink composition enhances the effect of this embodiment. These colorants can be used individually or in combination of two or more.

[0049] 1.1.3.1. Pigments

[0050] As for pigments, there are no particular limitations, but examples include organic pigments and inorganic pigments. Examples of organic pigments include azo pigments, polycyclic pigments, nitro pigments, nitroso pigments, and aniline black. Examples of inorganic pigments include titanium dioxide, iron oxide, and carbon black. Examples of carbon black include carbon black manufactured by known methods such as the contact process, furnace process, and thermal process.

[0051] As for carbon black, examples include CI (Colour Index Generic Name) Pigment Black 1, 7 and 11. Commercially available carbon blacks can be used, such as No. 2300, No. 900, MCF88, No. 33, No. 40, No. 45, No. 52, MA7, MA8, MA100, No. 2200B (trade name manufactured by Mitsubishi Chemical Corporation), Raven 5750, 5250, 5000, 3500, 1255, 700 (trade name manufactured by Columbia Carbon), Rega1 400R, 330R, 660R, MogulL, Monarch 700, 800, 880, 900, 1000, 1100, 1300, 1400 (trade name manufactured by CABOT Corporation), Pigment Black FW1, FW2, FW2V, FW18, FW200, S150, S160, S170, and Printex. 35, U, V, 140U, Special Black 6, 5, 4A, 4 (Product name manufactured by Degussa).

[0052] The pigment can be a self-dispersible pigment that disperses itself without the use of a dispersant, or a resin-dispersible pigment dispersed by a dispersant, but a self-dispersible pigment is preferred. By including a self-dispersible pigment in the first ink composition, it is easier to react with the treatment liquid composition and easier to improve wet rubbing fastness. The self-dispersible pigment can be prepared, for example, by the method described in the examples below.

[0053] The content of the colorant relative to the total amount of the first ink composition is preferably greater than 0.1%, and is 1 to 10% by mass, 2 to 9% by mass, 2 to 7% by mass, 3 to 6% by mass, or 4.5 to 8% by mass. By keeping the content of the colorant within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0054] The ink composition includes colorant, the content of which is greater than 0.1% relative to the total amount of the first ink composition. In the case of a colored ink composition, the total content of resin components in the first ink composition is preferably 3 to 8% by mass relative to the total amount of the first ink composition. More preferably, it is 3.5 to 7% by mass, 3.5 to 6% by mass, or 4 to 6% by mass. With the total content of resin components within the above range, there is a tendency to further improve wet rubbing fastness and texture. Furthermore, the total content of resin components refers to the total content of resin particles having crosslinking groups, resin particles without crosslinking groups, and resin components other than resin particles.

[0055] In another embodiment, the content of the colorant in the first ink composition is 0.1% by mass or less relative to the total amount of the first ink composition, and it can be a transparent ink. The appropriate amount of crosslinking agent and crosslinking resin particles varies depending on the type of fabric. By using a transparent ink with a predetermined content of colorant, the amount of crosslinking agent and crosslinking resin particles can be changed according to the type of fabric without changing the hue. Thus, regardless of the type of fabric, there is a tendency to further improve wet rubbing fastness and texture.

[0056] When the first ink composition is a transparent ink, it is preferable to also use the second ink composition, which will be described later.

[0057] By employing this structure, the amount of crosslinking agent or crosslinking resin particles in the ink film can be adjusted by the amount of the first ink composition, which is a transparent ink, and the amount of colorant in the ink film can be adjusted by the second ink composition. Therefore, for example, when using cotton, which easily improves wet rubbing fastness, as a recording medium, reducing the amount of crosslinking agent or crosslinking resin particles can further improve the texture; conversely, when using polyester, which is difficult to improve wet rubbing fastness, increasing the amount of crosslinking agent or crosslinking resin particles can further improve wet rubbing fastness. Thus, by using the first ink composition and the second ink composition, the amount of crosslinking agent or crosslinking resin particles and the amount of colorant in the ink film can be independently adjusted, allowing for adjustments to wet rubbing fastness and texture depending on the type of recording medium.

[0058] The content of the colorant is 0.1% or less relative to the total amount of the first ink composition. In the case of transparent ink, the total content of the resin component in the first ink composition is preferably 5 to 15% by mass relative to the total amount of the first ink composition. More preferably, it is 8 to 13% by mass, 8.5 to 12% by mass, or 8.5 to 11% by mass. With the total content of the resin component within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0059] 1.1.4. Organic solvents

[0060] The first ink composition may contain an organic solvent. There are no particular limitations on the organic solvent, but examples include monools, polyols, glycol ethers, nitrogen-containing solvents, ethers, and esters. These organic solvents may be used alone or in combination of two or more.

[0061] Polyols include, for example, diols and triols. Specifically, examples include ethylene glycol, propylene glycol, 1,2-propanediol, 1,2-butanediol, 1,3-propanediol, 1,4-butanediol, diethylene glycol, triethylene glycol, dipropylene glycol, trimethylolpropane, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, 1,6-hexanediol, 2-methyl-2,4-pentanediol, 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 glycerol.

[0062] Specific compounds that are glycol ethers include, for example, triethylene glycol monobutyl ether, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, ethylene glycol monomethyl ether acetate, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, diethylene glycol monotert-butyl ether, 1-methyl-1-methoxybutanol, 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, propylene glycol monobutyl ether, dipropylene glycol monobutyl ether, 3-methoxy-3-methyl-1-butanol, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol dimethyl ether, and diethylene glycol diethyl ether.

[0063] The content of organic solvent in the first ink composition is preferably 1 to 25% by mass, 10 to 20% by mass, or 12 to 15% by mass relative to the total amount of the first ink composition. By keeping the content of organic solvent within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0064] 1.1.5. Surfactants

[0065] Water-based pigment ink compositions may contain surfactants. Examples of surfactants include acetylenic diol surfactants, fluorinated surfactants, and silicone surfactants. These surfactants may be used alone or in combination of two or more.

[0066] There are no particular limitations on the types of surfactants that can be classified as alkynyldiols, but examples include the olefinic adducts of 2,4,7,9-tetramethyl-5-decyn-4,7-diol and 2,4,7,9-tetramethyl-5-decyn-4,7-diol, as well as the olefinic adducts of 2,4-dimethyl-5-decyn-4-ol and 2,4-dimethyl-5-decyn-4-ol. Commercially available alkynyldiol surfactants include, for example, SURFYNOL 465 (a trade name manufactured by Nissin Chemical Industries, Ltd.).

[0067] There are no particular limitations on what constitutes a fluorinated surfactant, but examples include perfluoroalkyl sulfonates, perfluoroalkyl carboxylates, perfluoroalkyl phosphates, perfluoroalkyl ethylene oxide adducts, perfluoroalkyl betaines, and perfluoroalkyl amine oxide compounds.

[0068] As an organosilicon surfactant, there are no particular limitations, but examples include polysiloxane compounds and polyether-modified organosilicon compounds.

[0069] The surfactant content in the first ink composition is preferably 0.01 to 5% by mass, 0.1 to 3% by mass, and 0.3 to 1% by mass relative to the total amount of the first ink composition. By keeping the surfactant content within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0070] 1.1.6. Alkali

[0071] The first ink composition contains an alkali. This inhibits the reaction between the crosslinking agent and the crosslinking resin particles, further improving the ink's storage stability and ejection reliability. By contacting this ink composition with a processing liquid composition on a recording medium, the crosslinking reaction between the crosslinking agent and the crosslinking resin particles is carried out using the acidity of the processing liquid composition.

[0072] There are no particular limitations on what constitutes a base, but both organic and inorganic bases can be listed. Examples of organic bases include triethanolamine, diethanolamine, monoethanolamine, tripropanolamine, triisopropanolamine, diisopropanolamine, and trihydroxymethylaminomethane. Examples of inorganic bases include metal hydroxides such as lithium hydroxide, sodium hydroxide, and potassium hydroxide; potassium dihydrogen phosphate, disodium hydrogen phosphate, potassium carbonate, sodium carbonate, sodium bicarbonate, and ammonia. These bases can be used alone or in combination of two or more.

[0073] The alkali content in the first ink composition is preferably 0.01 to 5% by mass, 0.1 to 3% by mass, and 0.5 to 2% by mass relative to the total amount of the first ink composition. By keeping the alkali content within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0074] 1.1.7. Water

[0075] The first ink composition in this embodiment contains water. Preferably, the water is water from which ionic impurities are largely removed; examples of such water include pure water such as ion-exchanged water, reverse osmosis water, and distilled water, as well as ultrapure water.

[0076] The water content relative to the total amount of the first ink composition is preferably 40-99% by mass, 50-95% by mass, 60-90% by mass, 65-85% by mass, or 70-80% by mass. By keeping the water content within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0077] 1.1.8. Other ingredients

[0078] Other than those mentioned above, the ingredients may include, for example, various additives such as chelating agents, softeners, solubilizers, viscosity modifiers, UV absorbers, antioxidants, and corrosion inhibitors, as needed.

[0079] 1.2. Treatment liquid composition

[0080] The processing liquid composition in this embodiment is a composition used to adhere to a recording medium, containing acid and water as a coagulant to coagulate components in the first ink. In the inkjet composition group, the processing liquid composition may be one type or more types.

[0081] The pH of the treatment solution composition is preferably 1.5–7.0, 2.0–6.5, 3–6, or 3.5–5. By keeping the pH within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0082] 1.2.1.Acid

[0083] The processing liquid composition in this embodiment contains an acid. The acid, acting as a coagulant, has a coagulant effect on the ink composition. Furthermore, since it does not bond with the functional groups of the crosslinking agents or crosslinking resin particles contained in the ink composition, the resulting ink film does not become overly hard and has a good texture. Moreover, since it does not hinder the crosslinking reaction of the crosslinking agents or crosslinking resin particles, it further improves wet rubbing fastness. Examples of acids include organic acids and inorganic acids, with organic acids being preferred. These acids can be used alone or in combination of two or more.

[0084] As organic acids, there are no particular limitations, but examples include lactic acid, malonic acid, citric acid, adipic acid, succinic acid, malic acid, levulinic acid, glutaric acid, polyacrylic acid, acetic acid, glycolic acid, maleic acid, ascorbic acid, fumaric acid, tartaric acid, sulfonic acid, orthophosphoric acid, pyrrolidone carboxylic acid, pyranone carboxylic acid, pyrrolic carboxylic acid, furan carboxylic acid, pyridine carboxylic acid, coumaric acid, thiophene carboxylic acid, and nicotinic acid. As inorganic acids, there are no particular limitations, but examples include sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid, and acidic salts such as sodium monohydrogen phosphate.

[0085] The acid content in the treatment liquid composition is preferably 1-30% by mass, 3-20% by mass, 4-15% by mass, 5-15% by mass, 5-12% by mass, or 8-12% by mass relative to the total amount of the treatment liquid composition. By keeping the acid content within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0086] Furthermore, the processing liquid composition preferably does not contain polyvalent metal salts. When the processing liquid composition contains polyvalent metal salts, the polyvalent metal salts form bonds with the crosslinking agents or crosslinking resin particles contained in the ink composition through multivalent interactions, creating steric barriers. Therefore, this can sometimes hinder the crosslinking reaction of the crosslinking agents or crosslinking resin particles, reducing the effect of improving wet rubbing fastness. Therefore, by not containing polyvalent metal salts, there is a tendency to further improve wet rubbing fastness. In addition, when bonds are formed between polyvalent metal salts and crosslinking agents or crosslinking resin particles due to multivalent interactions, there is a tendency to make the ink coating formed on the recording medium too hard, resulting in a deterioration in the texture of the recorded object. Therefore, by not containing polyvalent metal salts, there is a tendency to further improve the texture of the recorded object.

[0087] From this perspective, the content of the polyvalent metal salt relative to the total amount of the treatment liquid composition is preferably 2% by mass or less, 1% by mass or less, 0.5% by mass or less, 0.1% by mass or less, or 0% by mass or less. With the content of the polyvalent metal salt within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0088] 1.2.2. Alkali

[0089] The processing liquid composition may contain an alkali. Examples of alkalis include those exemplified as an alkali in the first ink composition.

[0090] The alkali content in the treatment liquid composition is preferably 0.1 to 10% by mass, 0.2 to 5% by mass, and 0.5 to 3% by mass relative to the total amount of the treatment liquid composition. By keeping the alkali content within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0091] 1.2.3. Organic solvents

[0092] In this embodiment, the processing liquid composition may contain an organic solvent. Examples of organic solvents used in the processing liquid composition include those exemplified as organic solvents in the first ink composition.

[0093] The content of organic solvent in the treatment liquid composition is preferably 1-50% by mass, 10-40% by mass, 20-35% by mass, or 19-27% by mass relative to the total amount of the treatment liquid composition. By keeping the content of organic solvent within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0094] 1.2.4. Surfactants

[0095] In this embodiment, the processing liquid composition may contain a surfactant. Examples of surfactants used in the processing liquid composition include those exemplified as surfactants in the first ink composition.

[0096] The surfactant content in the treatment liquid composition is preferably 0.01 to 5% by mass, 0.1 to 3% by mass, and 0.3 to 1% by mass relative to the total amount of the treatment liquid composition. By keeping the surfactant content within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0097] 1.2.5. Water

[0098] In this embodiment, the processing liquid composition contains water. Water used in the processing liquid composition can be exemplified by, for example, water used in the first ink composition.

[0099] The water content in the treatment liquid composition is preferably 50-99% by mass, 55-90% by mass, or 60-75% by mass relative to the total amount of the treatment liquid composition. By keeping the water content within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0100] 1.2.6. Other ingredients

[0101] Other than those mentioned above, the ingredients may include, for example, various additives such as resin particles, pH adjusters, chelating agents, softeners, solubilizers, viscosity modifiers, UV absorbers, antioxidants, and corrosion inhibitors, as needed.

[0102] 1.3. Second ink composition

[0103] The inkjet composition assembly of this embodiment may include a second ink composition. The second ink composition may contain pigment, resin particles, alkali, and water. Therefore, the amount of crosslinking agent or crosslinking resin particles in the ink film can be adjusted by the amount of the first ink composition, and the amount of pigment in the ink film can be adjusted by the second ink composition. Thus, for example, when using cotton, which easily improves wet rubbing fastness, as a recording medium, reducing the amount of crosslinking agent or crosslinking resin particles can further improve the texture; when using polyester, which is difficult to improve wet rubbing fastness, increasing the amount of crosslinking agent or crosslinking resin particles can further improve the wet rubbing fastness. In this way, by using the first ink composition and the second ink composition, the amount of crosslinking agent or crosslinking resin particles and the amount of pigment can be independently adjusted in the ink film, allowing for adjustment of wet rubbing fastness and texture depending on the type of recording medium.

[0104] In the case where the inkjet composition group of this embodiment includes a second ink composition, the first ink composition is preferably the transparent ink described above. Therefore, the effects described above can be easily obtained.

[0105] 1.3.1. Resin particles

[0106] The second ink composition in this embodiment includes resin particles. Examples of resin particles in the second ink composition include those having crosslinking groups and those not having crosslinking groups, as exemplified in the first ink composition.

[0107] 1.3.1.1. Resin particles with crosslinking groups

[0108] In this embodiment, the second ink composition may comprise resin particles having crosslinking groups. Examples of resin particles having crosslinking groups in the second ink composition include those exemplified as resin particles having crosslinking groups in the first ink composition.

[0109] The content of resin particles with crosslinking groups in the second ink composition is preferably 1-15% by mass, 2-10% by mass, 3-9% by mass, 3-8% by mass, 4-7% by mass, or 4-6% by mass relative to the total amount of the second ink composition. By keeping the content of resin particles with crosslinking groups within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0110] 1.3.1.2. Resin particles without crosslinking groups

[0111] In this embodiment, the second ink composition may comprise resin particles that do not have crosslinking groups. Examples of resin particles without crosslinking groups in the second ink composition include those exemplified in the first ink composition.

[0112] The content of resin particles without crosslinking groups in the second ink composition is preferably 1-15% by mass, 2-10% by mass, 3-9% by mass, 3-8% by mass, 4-7% by mass, and 4-6% by mass relative to the total amount of the second ink composition. By keeping the content of resin particles without crosslinking groups within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0113] The total content of resin components in the second ink composition is preferably 1 to 15% by mass, 2 to 10% by mass, 3 to 8% by mass, and 4 to 6% by mass relative to the total amount of the second ink composition. By keeping the total content of resin particles within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0114] 1.3.2. Crosslinking agents with crosslinking groups

[0115] In this embodiment, the second ink composition may contain a crosslinking agent having crosslinking groups. Examples of crosslinking agents used in the first ink composition include those described above.

[0116] The content of the crosslinking agent in the second ink composition is preferably 0.1 to 10% by mass, 0.5 to 5% by mass, and 1 to 3% by mass relative to the total amount of the second ink composition. By keeping the content of the crosslinking agent within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0117] 1.3.3. Color materials

[0118] In this embodiment, the second ink composition includes a colorant. Examples of colorants used in the first ink composition can be cited as examples of the colorants used in the second ink composition.

[0119] The content of the colorant relative to the total amount of the second ink composition is preferably 0.1 to 15% by mass, 1 to 10% by mass, and 3 to 7% by mass. By keeping the content of the colorant within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0120] 1.3.4. Alkali

[0121] In this embodiment, the second ink composition contains an alkali. Examples of alkalis that can be used as the alkali in the second ink composition include, for example, those described above.

[0122] The alkali content in the second composition is preferably 0.1 to 5% by mass, 0.3 to 4% by mass, and 0.5 to 3% by mass relative to the total amount of the second ink composition. By keeping the alkali content within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0123] 1.3.5. Organic solvents

[0124] In this embodiment, the second ink composition may contain an organic solvent. Examples of organic solvents used in the first ink composition include those described above.

[0125] The content of organic solvent in the second ink composition is preferably 1 to 25% by mass, 10 to 20% by mass, or 12 to 15% by mass relative to the total amount of the second ink composition. By keeping the content of organic solvent within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0126] 1.3.6. Surfactants

[0127] In this embodiment, the second ink composition may contain a surfactant. Examples of surfactants used in the first ink composition include those found in the second ink composition.

[0128] The surfactant content in the second ink composition is preferably 0.01 to 5% by mass, 0.1 to 3% by mass, and 0.3 to 1% by mass relative to the total amount of the second ink composition. By keeping the surfactant content within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0129] 1.3.7. Water

[0130] In this embodiment, the second ink composition contains water. Water used in the second ink composition can be exemplified by the water used in the first ink composition.

[0131] The water content in the second ink composition is preferably 40-99% by mass, 50-95% by mass, 60-90% by mass, 65-85% by mass, or 70-80% by mass relative to the total amount of the second ink composition. By keeping the water content within the above range, there is a tendency to further improve wet rubbing fastness and texture.

[0132] 1.3.8. Other ingredients

[0133] Other than those mentioned above, the ingredients may include, for example, various additives such as resin particles, pH adjusters, chelating agents, softeners, solubilizers, viscosity modifiers, UV absorbers, antioxidants, and corrosion inhibitors, as needed.

[0134] 2. Preparation methods of the treatment liquid composition and the ink composition

[0135] As a method for preparing the treatment liquid composition and the ink composition, for example, it can be prepared by mixing the components in any order and removing impurities or foreign matter by filtration as needed. As a method for mixing the components, it is possible to add the components sequentially to a container equipped with a stirring device such as a mechanical stirrer or a magnetic stirrer and then stir and mix them. As a filtration method, examples include centrifugal filtration and filter filtration.

[0136] In this embodiment, the inkjet ink composition group may include other compositions, such as other ink compositions.

[0137] 3. Recording media

[0138] As the recording medium for this embodiment, paper, film, cloth, metal, glass, and polymers can be used, for example. Among these, cloth is preferred, as the effect of this embodiment is more significant when recording images on cloth.

[0139] There are no particular limitations on the materials used to make fabrics, but examples include natural and synthetic fibers such as silk, cotton, wool, nylon, polyester, and rayon. Fabrics can be made from a single type of fiber or a blend of two or more fibers. Fabrics can be made from the fibers listed above in any form, such as woven fabrics, knitted fabrics, or non-woven fabrics.

[0140] 4. Recording Method

[0141] The inkjet recording method according to this embodiment includes: a treatment liquid adhesion step, in which a treatment liquid composition is ejected by an inkjet method to adhere to a fabric; and a first ink adhesion step, in which a first ink composition is ejected by an inkjet method to adhere to a fabric, wherein the treatment liquid composition contains an acid and water as a coagulant for coagulating the components in the first ink composition, and the first ink composition contains a crosslinking agent having crosslinking groups and / or resin particles having crosslinking groups, an alkali, and water.

[0142] Preferably, the first ink composition and the treatment liquid composition are applied to at least the same area on the fabric through the first ink application step and the treatment liquid application step.

[0143] In addition, there is no particular restriction on the order of the first ink adhesion process and the treatment liquid adhesion process. They can be performed simultaneously, or the treatment liquid adhesion process can be performed first, or the first ink adhesion process can be performed first.

[0144] When the first ink application process and the treatment liquid application process are performed simultaneously, it is preferable that the first ink application process and the treatment liquid application process are performed by scanning the same area of ​​the fabric and applying the first ink composition and the treatment liquid composition.

[0145] Here, "scanning" refers to moving the inkjet head relative to the recording area on the fabric. In this case, the inkjet head can be moved relative to the fabric, or the fabric can be moved relative to the inkjet head. Alternatively, the relative positional relationship between the inkjet head and the fabric can be changed by moving both of them.

[0146] Furthermore, the inkjet head can be mounted on a carriage, for example. The inkjet head can be moved by moving the carriage, which is also known as inkjet head movement.

[0147] According to the recording method of this embodiment, a first ink composition containing a treatment liquid composition comprising an acid as a coagulant and a crosslinking agent and / or resin particles having crosslinking groups can be used for recording, thereby obtaining a recorded object with excellent wet rubbing fastness and texture.

[0148] 4.1. Processing liquid adhesion procedure

[0149] The inkjet recording method according to this embodiment includes a process of spraying a processing liquid composition from a recording head and adhering it to a fabric. The processing liquid composition contains acid and water as a coagulant to coagulate components in a first ink composition. The processing liquid composition described above, which is part of the inkjet composition group of this embodiment, may also be used as the processing liquid composition of this embodiment.

[0150] The preferred amount of the treatment solution composition in the treatment solution adhesion process is 5–50 g / m³. 2 10~40g / m 2 20~30g / m 2 By ensuring the amount of the treatment liquid composition adheres within the aforementioned range, it is possible to obtain recordings with excellent wet rubbing fastness and texture.

[0151] 4.2. First Ink Adhesion Process

[0152] The inkjet recording method according to this embodiment includes a first ink composition adhesion step, in which a first ink composition is ejected by inkjet printing and adhered to a fabric. The first ink composition comprises a crosslinking agent having crosslinking groups and / or resin particles having crosslinking groups, an alkali, and water. As the first ink composition of this embodiment, the aforementioned first ink composition, which is part of the inkjet composition group of this embodiment, can be used. The first ink adhesion step can be performed simultaneously with the processing liquid adhesion step, or it can be performed before the processing liquid adhesion step.

[0153] The preferred amount of the first ink composition I0 in the first ink adhesion process is 15 to 70 g / m³. 2 More preferably, it is 20–60 g / m³. 2 30~50g / m 2 By ensuring that the amount of the first ink composition adheres within the aforementioned range, it is possible to obtain a recording material with excellent wet rubbing fastness and texture.

[0154] 4.3. Second Ink Adhesion Process

[0155] The inkjet recording method according to this embodiment may include a second ink adhesion step, in which a second ink composition is ejected by inkjet printing and adhered to a fabric. The second ink composition may contain a colorant, resin particles, alkali, and water. By including such a second ink adhesion step, the amount of colorant can be further adjusted using the second ink composition after the amount of crosslinking agent or crosslinking resin particles is adjusted using the first ink composition. As the second ink composition of this embodiment, the aforementioned second ink composition, which is part of the second ink composition group of the inkjet composition of this embodiment, can be used.

[0156] There is no particular restriction on the order of the second ink application process and the first ink application process. They can be performed simultaneously, or the second ink application process can be performed first, or the first ink application process can be performed first.

[0157] Preferably, the second ink application step is performed before the first ink application step. When the first ink composition is the aforementioned transparent ink, performing the second ink application step before the first ink application step can result in good rubbing fastness.

[0158] Furthermore, it is preferable to apply the first ink composition and the second ink composition to at least the same area of ​​the fabric through the first ink application process and the second ink application process.

[0159] The preferred amount of the second ink composition I1 in the second ink adhesion process is 10 to 50 g / m³. 2 More preferably, it is 20–45 g / m³. 2 30~42g / m 2 By ensuring that the amount of the second ink composition adheres within the aforementioned range, it is possible to obtain a recording material with excellent wet rubbing fastness and texture.

[0160] In this embodiment, the amount of the first ink composition can vary depending on the type of fabric being recorded. Depending on the type of fabric, the amount of crosslinking agent with crosslinking groups and resin particles with crosslinking groups affects the wet rubbing fastness differently. Therefore, by varying the amount of the treatment liquid composition based on the type of fabric, there is a tendency to achieve better wet rubbing fastness and texture. For example, when recording on cotton, which tends to have relatively good wet rubbing fastness, reducing the amount of the first ink composition reduces the amount of crosslinking agent with crosslinking groups and resin particles with crosslinking groups, resulting in a better texture of the recorded material. Conversely, when recording on polyester, which tends to have relatively poor wet rubbing fastness, increasing the amount of the first ink composition increases the amount of crosslinking agent with crosslinking groups and resin particles with crosslinking groups, resulting in better wet rubbing fastness of the recorded material.

[0161] 5. Inkjet recording device

[0162] The inkjet recording apparatus of this embodiment includes: an inkjet head that ejects liquid by inkjet method and adheres it to a fabric; and a control unit that controls the ejection of the liquid. The control unit performs: a treatment liquid adhesion step that ejects a treatment liquid composition by inkjet method and adheres it to a fabric; and a first ink adhesion step that ejects a first ink composition by inkjet method and adheres it to a fabric. The treatment liquid composition includes an acid and water as a coagulant to coagulate the components in the first ink composition. The first ink composition includes a crosslinking agent having crosslinking groups and / or resin particles having crosslinking groups, an alkali, and water.

[0163] According to the recording apparatus of this embodiment, a first ink composition containing a treatment liquid composition comprising an acid as a coagulant and a crosslinking agent and / or resin particles having crosslinking groups can be used for recording, thereby obtaining a recording with excellent wet rubbing fastness and texture.

[0164] Figure 1 This is a perspective view showing the structure of the recording device in this embodiment. Figure 1 The recording device 1 shown is a serial printer, but the recording device in this embodiment can also be a line printer. A serial printer is a printer in which a head unit is mounted on a carriage that moves along the main scanning direction (the horizontal and width direction of the recording medium), and droplets are ejected from a nozzle onto the recording medium as the carriage moves. A line printer, on the other hand, is a printer in which the head is fixed and the recording medium moves along the sub-scanning direction (the vertical and transport direction of the recording medium), thereby ejecting droplets from a nozzle on the head in conjunction with this movement.

[0165] like Figure 1 As shown, the recording apparatus 1 includes: a carriage 3 on which an inkjet head 2 is mounted; a carriage moving mechanism 4 that moves the carriage 3 along the width direction of the recording medium P; and a media transport mechanism 5 that transports the recording medium P along the media transport direction. Additionally, the recording apparatus 1 includes a control unit 6 that controls the overall operation of the recording apparatus 1. Furthermore, the aforementioned width direction of the recording medium refers to the main scanning direction (head scanning direction). The aforementioned media transport direction refers to the sub-scanning direction (the direction orthogonal to the main scanning direction).

[0166] As the recording device 1 according to this embodiment, an example is a so-called off-frame printer in which an ink receiving section 10 is installed in the housing of the recording device 1 and ink is supplied to the inkjet head 2 via an ink supply pipe 20, but it is not limited to this. For example, a so-called on-frame printer in which ink cartridges are mounted on a carriage can be used. In addition, a line printhead printer without a carriage can also be used.

[0167] The control unit 6 controls the liquid ejection operation, liquid delivery operation, and maintenance operation. For example, it outputs a drive signal to the inkjet head 2 to control the ink ejection onto the recording medium. The control unit 6 may be composed of processing circuits such as a CPU (Central Processing Unit) or FPGA (Field Programmable Gate Array) and storage circuits such as semiconductor memory. In particular, in this embodiment, the control unit performs: a processing liquid adhesion process, in which the processing liquid composition is ejected by inkjet printing and adhered to the fabric; and a first ink adhesion process, in which the first ink composition is ejected by inkjet printing and adhered to the fabric. A second ink adhesion process may also be performed, in which a second ink composition different from the first ink composition is adhered to the fabric.

[0168] In this embodiment, the control unit can vary the treatment liquid composition for the fabric depending on its type. Depending on the type of fabric, the amount of crosslinking agent and crosslinking resin particles applied has different effects on wet rubbing fastness. Therefore, by varying the amount of treatment liquid composition applied according to the type of fabric, there is a tendency to achieve better wet rubbing fastness and texture. For example, when recording on cotton, which tends to have relatively good wet rubbing fastness, reducing the amount of the first ink composition reduces the amount of crosslinking agent and crosslinking resin particles applied, resulting in a better texture of the recorded material. Conversely, when recording on polyester, which tends to have relatively poor wet rubbing fastness, increasing the amount of the first ink composition increases the amount of crosslinking agent and crosslinking resin particles applied, resulting in better wet rubbing fastness of the recorded material.

[0169] Example

[0170] The present invention will now be described in more detail using examples and comparative examples. The present invention is not limited to the following examples.

[0171] exist Figures 2-4 Tables 1 to 3, which show the composition of each composition of the examples and comparative examples, are described in the document.

[0172] 1. Preparation of each composition

[0173] Each component was added to a mixing tank in the manner described in Tables 1-3, mixed and stirred, and then filtered through a membrane filter to obtain the ink composition and treatment liquid composition of each example. Furthermore, unless otherwise specified, the values ​​of each component shown in the tables represent mass percentages. Additionally, the content values ​​in the tables represent the mass percentage of the solid component of the active ingredient.

[0174] Details of the abbreviations or product ingredients used in the treatment fluid composition are as follows.

[0175] acid: Citric acid glutaric acid H3PO4 (phosphoric acid) NaH2PO4·H2O (sodium dihydrogen phosphate hydrate) Alkali: KOH (potassium hydroxide) Organic solvents: glycerin 1,2-Hexanediol Surfactants: SURFYNOL 465 (acetylenic diol, manufactured by Nissin Chemical Industry Co., Ltd.) water: pure water Details of the abbreviations or product ingredients used in the ink composition are as follows.

[0176] pigment: Bk Pigment Dispersion: Pigments prepared using the following methods.

[0177] Resin particles: HYDRAN WLS-213 (non-crosslinked polyurethane resin, trade name manufactured by DIC) TAKELAC WS-5984 (a resin with capped isocyanate groups, manufactured by Mitsui Chemicals Co., Ltd.) ETERNACOLL UW-1501F (a resin with capped isocyanate groups, manufactured by UBE Corporation) TAKELAC WS-4022 (trade name manufactured by Mitsui Chemicals Co., Ltd.) Crosslinking agent: CARBODILITE E-02 (Carbodiimide crosslinking agent, trade name manufactured by Nisshinbo Chemical Co., Ltd.) CARBODILITE E-05 (Carbodiimide crosslinking agent, trade name manufactured by Nisshinbo Chemical Co., Ltd.) MEIKANATE TP-10 (terminated isocyanate crosslinking agent, trade name manufactured by Mingcheng Chemical Industry Co., Ltd.) EPOCROS WS-700 (Oxazoline-based crosslinking agent, trade name manufactured by Nippon Shokubai Co., Ltd.) EPOCROS K-2010E (Oxazoline-based crosslinking agent, trade name manufactured by Nippon Shokubai Co., Ltd.) EPOCROS K-2020E (Oxazoline-based crosslinking agent, trade name manufactured by Nippon Shokubai Co., Ltd.) EPOCROS K-2035E (Oxazoline-based crosslinking agent, trade name manufactured by Nippon Shokubai Co., Ltd.) Organic solvents: glycerin 1,2-Hexanediol Surfactants: SURFYNOL 465 (Alkyne diol; manufactured by Nissin Chemical Industries, Ltd.) Alkali: Triethanolamine water: pure water Preparation of Bk Pigment Dispersions 500g of carbon black raw material powder prepared by furnace method (primary particle size = 18nm, BET specific surface area = 180m²) 2 (DBP absorption = 186 mL / 100 g) was added to 3750 g of deionized water. The liquid was stirred in a dissolver while being heated to 45°C. While pulverizing the resulting mixture using a sand mill with 0.8 mm diameter zirconia beads, 30000 g of an aqueous solution of sodium hypochlorite (effective chlorine concentration = 12%) was added dropwise at 45°C for 3.5 hours. After the addition, the mixture was further pulverized in a sand mill for 30 minutes to obtain a self-dispersible carbon black dispersion. This dispersion was filtered through a 400 μm pore size metal mesh to remove the zirconia beads and unreacted carbon black. A 5% potassium hydroxide aqueous solution was added to the filtrate to adjust the pH to 7.5, and then the solution was subjected to ultrafiltration membrane desalination and purification until the conductivity of the dispersion was 1.5 mS / cm. Next, electrodialysis was used for desalination and purification until the conductivity of the liquid was 1.0 mS / cm. After purification, the solution was concentrated until the concentration of self-dispersible carbon black reached 17% by mass. The resulting concentrate was centrifuged to remove coarse particles and then filtered using a 0.6 μm filter. Next, deionized water was added to the filtered concentrate to dilute it until the concentration of self-dispersible carbon black reached 15% by mass, thus obtaining the Bk dispersed pigment dispersion.

[0178] 2. Printing Method

[0179] Using a modified ML-8000 printer (a trade name manufactured by Seiko Epson), printing was performed on 100% white cotton plain cloth (#4000, manufactured by Nisshinbo) and polyester cloth, with the processing liquid composition and ink composition being sprayed from the beginning in the same pass. Multiple main scans (2, 4, 8, 12, or 16 scans) were performed on the same scanning area, forming a full-page image of 20cm × 5cm on the cloth used as the recording medium. After image formation, the images were dried in an oven at 160°C for 5 minutes, thereby producing the recordings of each embodiment and comparative example. The ink composition and processing liquid composition, and their adhesion amounts, are shown in Tables 4 to 7. It should be noted that "full-page image" refers to an image in which dots are uniformly formed across the entire surface of the recording area (main scan direction × sub-scan direction: 20cm × 5cm) with the coating amounts of each liquid as described above. In addition, the inkjet head uses the following head unit, in which the distance between nozzles in the sub-scanning direction is 600 dpi, and two head chips are arranged along the sub-scanning direction, so that the nozzle length is 2 inches.

[0180] 3. Evaluation Methods

[0181] 3.1. Wet rubbing fastness

[0182] The recordings obtained by the above printing method were rubbed 10 times with a load of 9N on the image using a Crock meter FI-306 (manufactured by TESTER Industries, Inc.). Then, the optical density (OD) of the black in the printed image was measured using a colorimeter FD-7 (manufactured by Konica Minolta Corporation) via Status E on the ink-contaminated areas of the white cloth, and evaluated according to the following criteria.

[0183] When the recorded cotton fabric is rated A or above and the recorded polyester fabric is rated B or above, it can be considered that particularly good results have been obtained.

[0184] Evaluation Criteria

[0185] SS: Black has an OD of less than 0.18.

[0186] S: Black has an OD greater than 0.18 and less than 0.25.

[0187] A: Black has an OD greater than 0.25 and less than 0.32.

[0188] B: Black has an OD greater than 0.32 and less than 0.40.

[0189] C: The OD of black is greater than 0.40

[0190] 3.2. Texture of the recorded object

[0191] The texture of the printed material obtained by the above-described printing method was evaluated through sensory evaluation. Specifically, five random judges were allowed to touch the printed material and were asked to provide either a response that was "not inferior to the original feel of the fabric" or "the printed fabric is stiff and detracts from the original feel of the fabric." The evaluation was then conducted based on the following criteria.

[0192] It should be noted that even with a C rating, it can still be used in practice.

[0193] Evaluation Criteria

[0194] S: Five judges answered "It feels no less than the original fabric."

[0195] A: There are 3 to 5 judges who answered "It is no less than the original feel of the fabric".

[0196] B: There are more than one but fewer than three judges who answered "It is no less than the original feel of the fabric".

[0197] C: 0 judges answered "It feels no less than the original fabric".

[0198] 4. Evaluation Results

[0199] As shown in Tables 1 to 6, when the following inkjet composition is used, the wet rubbing fastness and texture of the obtained record are excellent. The inkjet composition comprises a processing liquid composition and a first ink composition. The processing liquid composition contains an acid and water as a coagulant to coagulate the components in the first ink composition. The first ink composition contains a crosslinking agent having crosslinking groups and / or resin particles having crosslinking groups, an alkali, and water.

Claims

1. An inkjet composition comprising a processing liquid composition and a first ink composition, The treatment liquid composition contains acid and water as a coagulant to coagulate the components in the first ink composition. The first ink composition comprises a crosslinking agent having crosslinking groups and / or resin particles having crosslinking groups, alkali, and water.

2. The inkjet composition according to claim 1, wherein, The first ink composition comprises resin particles that do not have crosslinking groups.

3. The inkjet composition according to claim 1, wherein, The first ink composition is a colored ink in which the content of the colorant is greater than 0.1% by mass relative to the total amount of the first ink composition.

4. The inkjet composition according to claim 1, wherein, The first ink composition is a transparent ink in which the content of the colorant is less than 0.1% by mass relative to the total amount of the first ink composition.

5. The inkjet composition according to claim 1, wherein, It also contains a second ink composition, The second ink composition comprises colorant, resin particles, alkali, and water.

6. The inkjet composition according to claim 5, wherein, The second ink composition further comprises a crosslinking agent having crosslinking groups.

7. The inkjet composition according to claim 3, wherein, The total content of the resin component in the first ink composition is 3% to 8% by mass relative to the total amount of the first ink composition.

8. The inkjet composition according to claim 4, wherein, The total content of the resin component in the first ink composition is 5% to 15% by mass relative to the total amount of the first ink composition.

9. The inkjet composition according to claim 1, wherein, The crosslinking agent comprises one or more selected from the group consisting of oxazoline-based crosslinking agents, carbodiimide-based crosslinking agents, and end-capped isocyanate-based crosslinking agents.

10. An inkjet recording method, comprising: In the treatment liquid adhesion process, the treatment liquid composition is sprayed out by inkjet printing so that it adheres to the fabric. as well as In the first ink adhesion step, the first ink composition is sprayed out using an inkjet method, causing it to adhere to the fabric. The treatment liquid composition contains acid and water as a coagulant to coagulate the components in the first ink composition. The first ink composition comprises a crosslinking agent having crosslinking groups and / or resin particles having crosslinking groups, alkali, and water.

11. The inkjet recording method according to claim 10, wherein, The adhesion amount I0 of the first ink composition in the first ink adhesion process is 15 g / m. 2 ~70g / m 2 .

12. The inkjet recording method according to claim 10, wherein, It also includes a second ink adhesion step, which involves spraying the second ink composition by inkjet printing and adhering it to the fabric. The second ink composition contains colorant, resin particles, alkali, and water.

13. The inkjet recording method according to claim 12, wherein, The amount of the second ink composition I1 in the second ink adhesion process is 10 g / m 2 ~50g / m 2 .

14. An inkjet recording apparatus comprising: an inkjet head that ejects liquid by an inkjet method and adheres it to a fabric; and a control unit that controls the ejection of the liquid. The control unit performs: The treatment liquid adhesion process involves spraying a treatment liquid composition onto a fabric using an inkjet printer; and... In the first ink adhesion step, the first ink composition is sprayed out using an inkjet method, causing it to adhere to the fabric. The treatment liquid composition contains acid and water as a coagulant to coagulate the components in the first ink composition. The first ink composition comprises a crosslinking agent having crosslinking groups and / or resin particles having crosslinking groups, alkali, and water.

15. The inkjet recording apparatus according to claim 14, wherein, The control unit adjusts the amount of the first ink composition applied to the fabric according to the type of fabric.

Images