Inkjet composition ink set, inkjet recording method, and inkjet recording apparatus

Abstract

This invention provides an inkjet composition set that exhibits excellent wet friction fastness and a superior texture for recorded materials. [Solution] An inkjet composition set comprising a processing liquid composition and a first ink composition, wherein the processing liquid composition contains an acid as a flocculant for flocculating the components in the first ink composition, and water, and the first ink composition contains a crosslinking agent having a crosslinking group and / or resin particles having a crosslinking group, a base, and water.

Description

[Technical Field]

[0001] The present invention relates to an inkjet composition ink set, an inkjet recording method, and an inkjet recording apparatus. [Background technology]

[0002] Inkjet recording methods are rapidly developing in various fields because they enable the recording of high-resolution images with relatively simple equipment. Among these, various studies have been conducted on inkjet recording methods for use on fabrics. For example, Patent Document 1 describes an inkjet clear ink composition, an inkjet ink set, and an inkjet printing method that can improve friction fastness without impairing the texture of the fabric, and the clear ink composition contains resin particles, a lubricant, and water, wherein the resin in the resin particles is a urethane resin having crosslinkable groups, and the dried coating film of the clear ink composition has a Young's modulus of 5 to 70 MPa. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2019-157071 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] Studies are underway to improve the friction fastness of recorded materials, including the inkjet composition described in Patent Document 1. [Means for solving the problem]

[0005] The present invention provides an inkjet composition set comprising a processing liquid composition and a first ink composition, wherein the processing liquid composition comprises an acid as a flocculant for agglomerating components in the first ink composition and water, and the first ink composition comprises a crosslinking agent having crosslinkable groups and / or resin particles having crosslinkable groups, a base and water.

[0006] The inkjet recording method of the present invention comprises a processing liquid adhesion step of ejecting a processing liquid composition by an inkjet method and adhering it to a fabric, and a first ink adhesion step of ejecting a first ink composition by an inkjet method and adhering it to a fabric, wherein the processing liquid composition comprises an acid as a flocculant for agglomerating the components in the first ink composition, and water, and the first ink composition comprises a crosslinking agent having a crosslinking group and / or resin particles having a crosslinking group, a base, and water.

[0007] The present invention provides an inkjet recording apparatus comprising an inkjet head that ejects a liquid by an 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 processing liquid adhesion step of ejecting a processing liquid composition by an inkjet method and adhering it to a fabric, and a first ink adhesion step of ejecting a first ink composition by an inkjet method and adhering it to a fabric, wherein the processing liquid composition contains an acid as a flocculant for agglomerating the components in the first ink composition, and water, and the first ink composition contains a crosslinking agent having a crosslinking group and / or resin particles having a crosslinking group, a base, and water. [Brief explanation of the drawing]

[0008] [Figure 1] An example of a recording device used in this embodiment is shown. [Figure 2] Table 1 shows the composition of the treatment solution used in the examples. [Figure 3] Table 2 shows the composition of the ink composition used in the examples. [Figure 4] Table 3 shows the composition of the ink composition used in the examples. [Figure 5] Table 4 shows the composition of the inkjet composition set used in the examples and its evaluation results. [Figure 6] Table 5 shows the composition of the inkjet composition set used in the examples and the evaluation results thereof. [Figure 7] Table 6 shows the composition of the inkjet composition set used in the example and its evaluation results. [Figure 8] Table 7 shows the composition of the inkjet composition set used in the examples and its evaluation results. [Modes for carrying out the invention]

[0009] The embodiments of the present invention (hereinafter referred to as "these embodiments") will be described in detail below, with reference to the drawings as necessary. However, the present invention is not limited thereto, and various modifications are possible without departing from its essence.

[0010] 1. Inkjet composition set The inkjet composition set of this embodiment is an inkjet composition set comprising a processing liquid composition and a first ink composition, wherein the processing liquid composition contains an acid as a flocculant for flocculating the components in the first ink composition, and water, and the first ink composition contains a crosslinking agent having a crosslinkable group (hereinafter also simply referred to as "crosslinking agent") and / or resin particles having a crosslinkable group (hereinafter also referred to as "crosslinkable resin particles"), a base, and water.

[0011] By including a crosslinking agent or crosslinkable resin particles in the ink composition, the wet rubbing fastness of the recording can be improved. However, when a conventional treatment liquid composition containing a polyvalent metal salt as a flocculant is used in combination with an ink composition containing a crosslinking agent or crosslinkable resin particles, the polyvalent metal ions and functional groups such as carboxy groups interact polyvalently to form bonds. Due to the steric hindrance of these bonds, the crosslinking reaction of the crosslinking agent or crosslinkable resin particles is inhibited, and the effect of improving the wet rubbing fastness is reduced. Although it is conceivable to use a monovalent metal salt as a flocculant, the monovalent metal salt has low flocculation power, and the color development property of the obtained recording is reduced. Therefore, it has been difficult to improve the wet rubbing fastness using a metal salt. In addition, when a crosslinking agent or crosslinkable resin particles are included in the ink composition, the coating film of the ink composition becomes harder due to the action presumably forming the above-described bonds with a conventional flocculant such as a polyvalent metal salt, and the texture of the recording may deteriorate.

[0012] In contrast, in the present embodiment, a treatment liquid composition containing an acid as a flocculant is used. The acid can aggregate the ink composition without polyvalently interacting with the functional groups in the crosslinking agent or crosslinkable resin particles or inhibiting the crosslinking reaction, so that the wet rubbing fastness and texture can be improved.

[0013] Hereinafter, each component included in the inkjet composition set in the present embodiment will be described in detail.

[0014] 1.1. First Ink Composition The first ink composition in the present embodiment includes a crosslinking agent having a crosslinkable group and / or resin particles having a crosslinkable group, a base, and water. By having a crosslinking agent having a crosslinkable group or resin particles having a crosslinkable group in the first ink composition, a crosslinking reaction proceeds on the recording medium, and the wet rubbing fastness of the obtained coating film is improved.

[0015] 1.1.1. Resin Particles In this embodiment, the resin particles are particles containing a resin, and either emulsion-state or powder-state resin particles can be used. From the perspective of suppressing the increase in viscosity of the first ink composition, it is preferable to use resin particles in an emulsion state.

[0016] The resin particles are not particularly limited. For example, 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 can be mentioned.

[0017] 1.1.1.1. Resin particles having a crosslinkable group In this embodiment, the first ink composition preferably contains resin particles having a crosslinkable group. In this embodiment, the crosslinkable group is a group capable of forming a crosslinked structure by reaction. It may be a group that reacts between crosslinkable groups to form a crosslinked structure, or a group that reacts with a functional group different from the crosslinkable group to form a crosslinked structure. The crosslinkable group is not particularly limited. For example, oxazoline group, carbodiimide group, isocyanate group, blocked isocyanate group, silanol group, amide group, and hydrazide group can be mentioned. Among these, the crosslinkable group is preferably an oxazoline group, a carbodiimide group, and a blocked isocyanate group. By using resin particles having these crosslinkable groups, the wet friction fastness and texture tend to be further improved. These resin particles having crosslinkable groups are used alone or in combination of two or more.

[0018] The method for obtaining resin particles having a crosslinkable group is not particularly limited. It may be obtained by polymerizing a monomer having a crosslinkable group, or by a polymerization reaction involving a reaction in which a crosslinkable group is generated, or by reacting a crosslinking agent with resin particles. Also, commercially available products may be used as the resin particles having a crosslinkable group.

[0019] A blocked isocyanate group is a functional group in which an isocyanate group is chemically protected by a blocking agent or the like. Examples of commercially available resin particles having blocked isocyanate groups include Takelac WS-5984 (product name of Mitsui Chemicals, Inc.) and ETERNACOLL UW-1501F (product name of UBE Corporation).

[0020] The silanol group is not particularly limited, but examples include the triethoxysilyl group, the trimethoxysilyl group, and the tris(2-methoxyethoxy)silyl group. A commercially available resin particle having a silanol group is, for example, Takelac WS-4022 (product name of Mitsui Chemicals).

[0021] The content of crosslinkable resin particles 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 10% by mass, relative to the total amount of the first ink composition. By keeping the content of crosslinkable resin particles within the above range, wet friction fastness and texture tend to be further improved.

[0022] 1.1.1.2. Resin particles that do not have crosslinking groups The first ink composition in this embodiment may contain 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. A commercially available example of a non-crosslinked polyurethane resin is Hydran WLS-213 (non-crosslinked polyurethane resin, product name of DIC Corporation). These resin particles that do not have crosslinking groups may be used individually or in combination of two or more types.

[0023] 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, wet friction fastness and texture tend to be further improved.

[0024] 1.1.2. Crosslinking agents having crosslinking groups In this embodiment, the first ink composition may also preferably contain a crosslinking agent having a crosslinking group. The crosslinking agent having a crosslinking group in this embodiment is not particularly limited, but examples include isocyanate-based crosslinking agents, blocked isocyanate-based crosslinking agents, oxazoline-based crosslinking agents, aziridine-based crosslinking agents, dihydrazide-based crosslinking agents, and carbodiimide-based crosslinking agents. In particular, the crosslinking agent preferably contains one or more selected from the group consisting of oxazoline-based crosslinking agents, carbodiimide-based crosslinking agents, and blocked isocyanate-based crosslinking agents. Using these crosslinking agents tends to further improve wet friction fastness and texture. These crosslinking agents may be used individually or in combination of two or more.

[0025] Blocked isocyanate crosslinking agents are compounds in which isocyanate groups are chemically protected by a blocking agent or the like. Blocked isocyanate crosslinking agents used include isocyanate crosslinking agents such as aliphatic polyisocyanates, alicyclic polyisocyanates, aromatic aliphatic polyisocyanates, and aromatic polyisocyanates, which are reacted with a blocking agent. Commercially available blocked isocyanate crosslinking agents may also be used, for example, Meikanate TP-10 (product name of Meisei Chemical Industry Co., Ltd.).

[0026] The oxazoline crosslinking agent is not particularly limited, but examples include polymers obtained by homopolymerizing oxazoline group-containing ethylenically unsaturated monomers such as 2-isopropenyl-2-oxazoline and 2-vinyl-2-oxazoline, and polymers obtained by copolymerizing the above unsaturated monomer with other unsaturated monomers. Commercial oxazoline crosslinking agents may also be used, and examples of such commercial products include Epocross WS-700, Epocross K-2010E, Epocross K-2020E, and Epocross K-2035E (product names of Nippon Shokubai Co., Ltd.).

[0027] The carbodiimide crosslinking agent is not particularly limited, but examples include compounds containing two or more carbodiimide groups in one molecule. Commercially available carbodiimide crosslinking agents may also be used, such as Carbodilite E-02 and Carbodilite E-05 (product names of Nisshinbo Chemical Co., Ltd.).

[0028] The crosslinking agent content 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, relative to the total amount of the first ink composition. By setting the crosslinking agent content within the above range, wet friction fastness and texture tend to be further improved.

[0029] 1.1.3. Colorants In this embodiment, the first ink composition contains a colorant, and the colorant content is more than 0.1% of the total amount of the first ink composition, and may be colored. Because the first ink composition is a colored ink containing a colorant, there is no need to use another ink composition, and it can be used as an inkjet composition set with a simpler process and a smaller coating amount.

[0030] The colorants in this embodiment are not particularly limited, but include pigments and dyes, and are preferably pigments. The effects of this embodiment become more pronounced when the first ink composition contains a pigment. These colorants can be used individually or in combination of two or more.

[0031] 1.1.3.1. Pigments The pigments are not particularly limited, 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 those produced by known methods such as the contact method, furnace method, and thermal method.

[0032] Examples of carbon blacks include CI (Colour Index Generic Name) Pigment Blacks 1, 7, and 11. Commercially available carbon blacks can be used, for example: No.2300, No.900, MCF88, No.33, No.40, No.45, No.52, MA7, MA8, MA100, No.2200B (product names from Mitsubishi Chemical Corporation), Raven 5750, 5250, 5000, 3500, 1255, 700 (product names from Columbia Carbon Corporation), Rega1 400R, 330R, 660R, Mogul L, Monarch 700, 800, 880, 900, 1000, 1100, 1300, 1400 (product names from CABOT Corporation), Color Black FW1, FW2, FW2V, FW18, FW200, S150, S160, S170, Printex 35, U, V, 140U, SpecialBlack Examples include 6, 5, 4A, and 4 (product names from Degussa).

[0033] The pigment may be a self-dispersing pigment that disperses on its own without the use of a dispersant, or a resin-dispersed pigment that disperses with a dispersant, but a self-dispersing pigment is preferred. The inclusion of a self-dispersing pigment in the first ink composition facilitates the reaction with the processing liquid composition, and improves wet friction fastness. The self-dispersing pigment can be prepared, for example, by the method described in the examples below.

[0034] The colorant content is preferably more than 0.1% of the total amount of the first ink composition, 1 to 10% by mass, 2 to 9% by mass, 2 to 7% by mass, 3 to 6% by mass, and 4.5 to 8% by mass. When the colorant content is within the above range, wet friction fastness and texture tend to be further improved.

[0035] When the first ink composition contains a colorant, and the colorant content exceeds 0.1% of the total amount of the first ink composition, the total content of resin components in the first ink composition is preferably 3 to 8% by mass, more preferably 3.5 to 7% by mass, 3.5 to 6% by mass, and 4 to 6% by mass, relative to the total amount of the first ink composition. When the total content of resin components is within the above range, wet friction fastness and texture tend to be further improved. The total content of resin components refers to the sum of the content of resin particles having crosslinkable groups, resin particles without crosslinkable groups, and resin components other than resin particles.

[0036] In another embodiment, the first ink composition may be a clear ink, having a colorant content of 0.1% by mass or less relative to the total amount of the first ink composition. The appropriate amount of crosslinking agent and crosslinkable resin particles to adhere varies depending on the type of fabric. By using a clear ink with a colorant content below a predetermined level, the amount of crosslinking agent and crosslinkable resin particles to adhere can be changed according to the type of fabric without changing the color. This tends to improve wet abrasion fastness and texture, regardless of the type of fabric. If the first ink composition is a clear ink, it is preferable to also use the second ink composition described later. With this configuration, the amount of crosslinking agent or crosslinkable resin particles in the ink coating can be adjusted by the amount of the first ink composition, which is a clear ink, and the amount of colorant in the ink coating can be adjusted by the second ink composition. For example, when using cotton as the recording medium, which is easy to improve wet friction fastness, the texture can be further improved by reducing the amount of crosslinking agent or crosslinkable resin particles attached, and when using polyester, which is difficult to improve wet friction fastness, the wet friction fastness can be further improved by increasing the amount of crosslinking agent or crosslinkable resin particles attached. In this way, by using the first ink composition and the second ink composition, the amount of crosslinking agent or crosslinkable resin particles and the amount of colorant in the ink coating can be adjusted independently, and the wet friction fastness and texture can be adjusted depending on the type of recording medium.

[0037] When the colorant content is 0.1% or less of the total amount of the first ink composition, and it is a clear ink, the total content of the resin component in the first ink composition is preferably 5 to 15% by mass, more preferably 8 to 13% by mass, 8.5 to 12% by mass, and 8.5 to 11% by mass, relative to the total amount of the first ink composition. When the total content of the resin component is within the above range, wet friction fastness and texture tend to be further improved.

[0038] 1.1.4. Organic Solvents The first ink composition may contain an organic solvent. The organic solvent is not particularly limited, but examples include monoalcohols, polyhydric alcohols, glycol ethers, nitrogen-containing solvents, ethers, and esters. These organic solvents may be used individually or in combination of two or more.

[0039] Examples of polyhydric alcohols include diol compounds and triol compounds. 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 glycerin.

[0040] Specific compounds of 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 mono-t-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.

[0041] The content of the organic solvent in the first ink composition is preferably 1 to 25% by mass, 10 to 20% by mass, and 12 to 15% by mass, relative to the total amount of the first ink composition. By keeping the content of the organic solvent within the above range, wet friction fastness and texture tend to be further improved.

[0042] 1.1.5. Surfactants Water-based pigment ink compositions may contain surfactants. Examples of surfactants include acetylene glycol-based surfactants, fluorine-based surfactants, and silicone-based surfactants. These surfactants may be used individually or in combination of two or more.

[0043] The acetylene glycol-based surfactant is not particularly limited, but examples include 2,4,7,9-tetramethyl-5-decine-4,7-diol and alkylene oxide adducts of 2,4,7,9-tetramethyl-5-decine-4,7-diol, as well as 2,4-dimethyl-5-decine-4-ol and alkylene oxide adducts of 2,4-dimethyl-5-decine-4-ol. A commercially available acetylene glycol-based surfactant is, for example, Surfinol 465 (trade name of Nisshin Chemical Industry Co., Ltd.).

[0044] Examples of fluorinated surfactants include perfluoroalkyl sulfonates, perfluoroalkyl carboxylates, perfluoroalkyl phosphate esters, perfluoroalkyl ethylene oxide adducts, perfluoroalkyl betaines, and perfluoroalkylamine oxide compounds.

[0045] Silicone-based surfactants are not particularly limited, but examples include polysiloxane compounds and polyether-modified organosiloxanes.

[0046] 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 setting the surfactant content within the above range, wet friction fastness and texture tend to improve.

[0047] 1.1.6. Bases The first ink composition contains a base. This suppresses the reaction between the crosslinking agent and the crosslinkable resin particles, thereby further improving the storage stability and ejection reliability of the ink. When such an ink composition comes into contact with the processing liquid composition on a recording medium, the crosslinking reaction between the crosslinking agent and the crosslinkable resin particles proceeds due to the acid in the processing liquid composition.

[0048] Examples of bases include organic and inorganic bases, although they are not particularly limited. Examples of organic bases include triethanolamine, diethanolamine, monoethanolamine, tripanolamine, triisopropanolamine, diisopropanolamine, and trishydroxymethylaminomethane. 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 individually or in combination of two or more.

[0049] The base 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 base content within the above range, wet friction fastness and texture tend to improve.

[0050] 1.1.7.Water The first ink composition in this embodiment contains water. Preferably, the water is one from which ionic impurities have been removed as much as possible. Examples of such water include pure water such as ion-exchanged water, reverse osmosis water, and distilled water, as well as ultrapure water.

[0051] The water content 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 first ink composition. By keeping the water content within the above range, the wet friction fastness and texture tend to improve.

[0052] 1.1.8. Other Ingredients In addition to the above-mentioned components, various additives such as chelating agents, softening agents, solubilizers, viscosity modifiers, ultraviolet absorbers, antioxidants, and corrosion inhibitors may be included as needed.

[0053] 1.2. Processing liquid composition The processing liquid composition in this embodiment is used by adhering it to a recording medium and contains an acid as a coagulant for agglomerating the components in the first ink, and water. In the inkjet composition set, there may be one processing liquid composition or two or more compositions.

[0054] The pH of the treatment solution composition is preferably 1.5 to 7.0, 2.0 to 6.5, 3 to 6, or 3.5 to 5. Keeping the pH within the above range tends to further improve wet friction fastness and texture.

[0055] 1.2.1. Acids The processing liquid composition in this embodiment contains an acid. The acid, acting as a flocculant, has a flocculating effect on the ink composition and does not bond with the functional groups of the crosslinking agent or crosslinkable resin particles contained in the ink composition. As a result, the resulting ink coating does not become too hard, and a good texture is achieved. Furthermore, since it does not inhibit the crosslinking reaction of the crosslinking agent or crosslinkable resin particles, wet friction fastness is also further improved. Examples of acids include organic acids and inorganic acids, with organic acids being preferred. These acids can be used individually or in combination of two or more.

[0056] Examples of organic acids include, but are not limited to, 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, orthophosphate, pyrrolidone carboxylic acid, pyrrone carboxylic acid, pyrrole carboxylic acid, furanic acid, pyridine carboxylic acid, coumaric acid, thiophene carboxylic acid, and nicotinic acid. Examples of inorganic acids include, but are not limited to, sulfuric acid, hydrochloric acid, nitric acid, and phosphoric acid, as well as acidic salts of sodium monohydrogen phosphate.

[0057] The acid content in the treatment solution composition is preferably 1 to 30% by mass, 3 to 20% by mass, 4 to 15% by mass, 5 to 15% by mass, 5 to 12% by mass, and 8 to 12% by mass, relative to the total amount of the treatment solution composition. By keeping the acid content within the above range, wet friction fastness and texture tend to improve further.

[0058] Furthermore, it is preferable that the processing liquid composition does not contain polyvalent metal salts. If the processing liquid composition contains polyvalent metal salts, the polyvalent metal salts and the crosslinking agent or crosslinkable resin particles contained in the ink composition form bonds through polyvalent interactions, causing steric hindrance. As a result, the crosslinking reaction of the crosslinking agent or crosslinkable resin particles may be inhibited, and the effect of improving wet friction fastness may decrease. Therefore, by not including polyvalent metal salts, wet friction fastness tends to be further improved. In addition, if bonds are formed between the polyvalent metal salts and the crosslinking agent or crosslinkable resin particles due to polyvalent interactions, the ink coating film formed on the recording medium tends to become too hard, resulting in a poor texture of the recorded material. Therefore, by not including polyvalent metal salts, the texture of the recorded material tends to be further improved.

[0059] From this perspective, the polyvalent metal salt content is preferably 2% by mass or less, 1% by mass or less, 0.5% by mass or less, 0.1% by mass or less, and 0% by mass or less, relative to the total amount of the treatment solution composition. When the polyvalent metal salt content is within the above range, wet friction fastness and texture tend to be further improved.

[0060] 1.2.2. Bases The processing solution composition may contain a base. Examples of bases include those exemplified as the base in the first ink composition.

[0061] The base content in the treatment solution composition is preferably 0.1 to 10% by mass, 0.2 to 5% by mass, or 0.5 to 3% by mass, relative to the total amount of the treatment solution composition. By keeping the base content within the above range, wet friction fastness and texture tend to improve further.

[0062] 1.2.3. Organic Solvents In this embodiment, the processing liquid composition may contain an organic solvent. Examples of the organic solvent in the processing liquid composition include those exemplified as the organic solvent in the first ink composition.

[0063] The content of the organic solvent in the treatment solution composition is preferably 1 to 50% by mass, 10 to 40% by mass, 20 to 35% by mass, and 19 to 27% by mass, relative to the total amount of the treatment solution composition. Keeping the organic solvent content within these ranges tends to further improve wet friction fastness and texture.

[0064] 1.2.4. Surfactants In this embodiment, the processing solution composition may contain a surfactant. Examples of surfactants in the processing solution composition include those exemplified as surfactants in the first ink composition.

[0065] The surfactant content in the treatment solution 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 solution composition. By setting the surfactant content within the above range, wet friction fastness and texture tend to improve further.

[0066] 1.2.5.Water In this embodiment, the processing liquid composition includes water. Examples of water in the processing liquid composition include the water in the first ink composition.

[0067] The water content in the treatment solution composition is preferably 50-99% by mass, 55-90% by mass, or 60-75% by mass, relative to the total amount of the treatment solution composition. Keeping the water content within these ranges tends to further improve wet friction fastness and texture.

[0068] 1.2.6. Other Ingredients In addition to the above-mentioned components, various additives such as resin particles, pH adjusters, chelating agents, softeners, solubilizers, viscosity modifiers, UV absorbers, antioxidants, and corrosion inhibitors may be included as needed.

[0069] 1.3. Second Ink Composition The inkjet composition set of this embodiment may also include a second ink composition. The second ink composition may contain a colorant, resin particles, a base, and water. This allows the amount of crosslinking agent or crosslinkable resin particles in the ink film to be adjusted by the amount of the first ink composition applied, and the amount of colorant in the ink film to be adjusted by the second ink composition. For example, when using cotton as the recording medium, which is easy to improve wet friction fastness with, the texture can be further improved by reducing the amount of crosslinking agent or crosslinkable resin particles applied, and when using polyester, which is difficult to improve wet friction fastness with, the wet friction fastness can be further improved by increasing the amount of crosslinking agent or crosslinkable resin particles applied. In this way, by using the first ink composition and the second ink composition, the amount of crosslinking agent or crosslinkable resin particles and the amount of colorant can be adjusted independently in the ink film, and the wet friction fastness and texture can be adjusted depending on the type of recording medium. If the inkjet composition set of this embodiment includes a second ink composition, the first ink composition is preferably the clear ink described above. This makes it easier to obtain the effects described above.

[0070] 1.3.1. Resin particles The second ink composition in this embodiment contains resin particles. Examples of resin particles in the second ink composition include those exemplified in the first ink composition as resin particles having crosslinkable groups and resin particles not having crosslinkable groups.

[0071] 1.3.1.1. Resin particles having crosslinkable groups In this embodiment, the second ink composition may contain resin particles having crosslinkable groups. Examples of resin particles having crosslinkable groups in the second ink composition include those exemplified as the resin particles having crosslinkable groups in the first ink composition.

[0072] The content of crosslinkable resin particles in the second ink composition is preferably 1 to 15% by mass, 2 to 10% by mass, 3 to 9% by mass, 3 to 8% by mass, 4 to 7% by mass, and 4 to 6% by mass, relative to the total amount of the second ink composition. By keeping the content of crosslinkable resin particles within the above range, wet friction fastness and texture tend to be further improved.

[0073] 1.3.1.2. Resin particles that do not have crosslinking groups In this embodiment, the second ink composition may contain resin particles that do not have crosslinking groups. Examples of resin particles having crosslinking groups in the second ink composition include those exemplified as resin particles that do not have crosslinking groups in the first ink composition.

[0074] The content of resin particles without crosslinking groups in the second ink composition is preferably 1 to 15% by mass, 2 to 10% by mass, 3 to 9% by mass, 3 to 8% by mass, 4 to 7% by mass, and 4 to 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, wet friction fastness and texture tend to be further improved.

[0075] 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, wet friction fastness and texture tend to be further improved.

[0076] 1.3.2. Crosslinking agents having crosslinking groups In this embodiment, the second ink composition may contain a crosslinking agent having crosslinkable groups. Examples of the crosslinking agent for the processing liquid composition include those exemplified as the crosslinking agent for the first ink composition.

[0077] The crosslinking agent content 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 crosslinking agent content within the above range, wet friction fastness and texture tend to improve.

[0078] 1.3.3. Colorants In this embodiment, the second ink composition includes a colorant. Examples of the colorant in the second ink composition include those exemplified as the colorant in the first ink composition.

[0079] The colorant content is preferably 0.1 to 15% by mass, 1 to 10% by mass, and 3 to 7% by mass, relative to the total amount of the second ink composition. By keeping the colorant content within the above range, wet friction fastness and texture tend to improve.

[0080] 1.3.4. Bases In this embodiment, the second ink composition contains a base. Examples of the base include those exemplified as the base of the second ink composition.

[0081] The base 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 base content within the above range, the wet friction fastness and texture tend to improve further.

[0082] 1.3.5. Organic Solvents In this embodiment, the second ink composition may contain an organic solvent. Examples of the organic solvent in the second ink composition include those exemplified as the organic solvent in the first ink composition.

[0083] The content of the organic solvent in the second ink composition is preferably 1 to 25% by mass, 10 to 20% by mass, and 12 to 15% by mass, relative to the total amount of the second ink composition. By keeping the content of the organic solvent within the above range, wet friction fastness and texture tend to be further improved.

[0084] 1.3.6. Surfactants In this embodiment, the second ink composition may contain a surfactant. Examples of surfactants in the second ink composition include those exemplified as surfactants in the first ink composition.

[0085] 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 setting the surfactant content within the above range, wet friction fastness and texture tend to improve.

[0086] 1.3.7.Water In this embodiment, the second ink composition contains water. Examples of the water in the second ink composition include those exemplified as the water in the first ink composition.

[0087] 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, the wet friction fastness and texture tend to improve.

[0088] 1.3.8. Other Ingredients In addition to the above-mentioned components, various additives such as resin particles, pH adjusters, chelating agents, softeners, solubilizers, viscosity modifiers, UV absorbers, antioxidants, and corrosion inhibitors may be included as needed.

[0089] 2. Method for preparing the processing solution composition and the ink composition The processing liquid composition and ink composition can be prepared, for example, by mixing each component in any order and removing impurities and foreign matter by filtration or other means as necessary. A method for mixing the components is to sequentially add each component to a container equipped with a stirring device such as a mechanical stirrer or a magnetic stirrer, and then stir and mix them. Filtration methods include centrifugal filtration and filter filtration.

[0090] In this embodiment, the inkjet ink composition set may also include other compositions, for example, other ink compositions.

[0091] 3. Recording media For the recording medium of this embodiment, for example, paper, film, cloth, metal, glass, and polymer can be used. Among these, cloth is preferred, and the effects of this embodiment become more pronounced when recording images on cloth.

[0092] The materials that make up the fabric are not particularly limited and include, for example, natural fibers such as silk, cotton, wool, nylon, polyester, and rayon, as well as synthetic fibers. The fabric may be made from one type of fiber or from a blend of two or more types of fibers. The fabric may be made from the fibers listed above in any form, such as woven fabric, knitted fabric, or nonwoven fabric.

[0093] 4. Recording Method The inkjet recording method according to this embodiment includes a processing liquid attachment step of ejecting a processing liquid composition by an inkjet method and adhering it to a fabric, and a first ink attachment step of ejecting a first ink composition by an inkjet method and adhering it to a fabric, wherein the processing liquid composition includes an acid as a flocculant for agglomerating the components in the first ink composition, and water, and the first ink composition includes a crosslinking agent having a crosslinking group and / or resin particles having a crosslinking group, a base, and water. It is preferable that the first ink composition and the processing liquid composition are applied to at least the same area on the fabric through the first ink application step and the processing liquid application step. Furthermore, the order of the first ink application process and the processing liquid application process is not particularly limited; they may be performed simultaneously, the processing liquid application process may be performed first, or the first ink application process may be performed first. When the first ink application step and the processing liquid application step are performed simultaneously, it is preferable that the first ink application step and the processing liquid application step are performed by applying the first ink composition and the processing liquid composition to the same area of ​​the fabric with the same scan.

[0094] Here, "scanning" refers to moving the inkjet head relative to the recording area on the fabric. In this case, the inkjet head may move relative to the fabric, or the fabric may move relative to the inkjet head. Furthermore, the relative positional relationship between the inkjet head and the fabric may change as both move. The inkjet head can be mounted on a carriage, for example. The inkjet head may be moved as the carriage moves; in this case as well, it is the movement of the inkjet head.

[0095] According to the recording method of this embodiment, recording can be performed using a treatment liquid composition containing an acid as a flocculant and a first ink composition containing a crosslinking agent having crosslinking groups and / or resin particles having crosslinking groups, thereby obtaining a recording with excellent wet friction fastness and texture.

[0096] 4.1. Processing liquid application process The inkjet recording method according to this embodiment includes a processing liquid composition attachment step in which a processing liquid composition is ejected from a recording head and attached to a fabric, the processing liquid composition comprising an acid as a flocculant for agglomerating the components in the first ink composition, and water. As the processing liquid composition of this embodiment, the processing liquid composition described above as the processing liquid composition of the inkjet composition set of this embodiment may be used.

[0097] The amount of treatment liquid composition applied during the treatment liquid application step is preferably 5 to 50 g / m².2 It is 10-40 g / m 2 It is 20-30 g / m 2 Therefore, by keeping the amount of the processing liquid composition within the above range, it is possible to obtain a record with excellent wet friction fastness and texture.

[0098] 4.2. First Ink Application Process The inkjet recording method according to this embodiment includes a first ink composition attachment step in which a first ink composition is ejected by an inkjet method and attached to a fabric, the first ink composition comprising a crosslinking agent having a crosslinkable group and / or resin particles having a crosslinkable group, a base, and water. As the first ink composition in this embodiment, the one described above as the first ink composition of the inkjet composition set of this embodiment may be used. The first ink attachment step may be performed simultaneously with the processing liquid attachment step, or before the processing liquid attachment step.

[0099] The amount of the first ink composition applied in the first ink application step, I0, is preferably 15 to 70 g / m². 2 More preferably, 20-60 g / m² 2 It is 30-50 g / m 2 Therefore, by ensuring that the amount of the first ink composition adheres within the above range, a recording material with excellent wet friction fastness and texture can be obtained.

[0100] 4.3. Second Ink Application Process The inkjet recording method according to this embodiment may include a second ink attachment step in which a second ink composition is ejected by an inkjet method and adhered to a fabric, and the second ink composition may contain a colorant, resin particles, a base, and water. By including such a second ink attachment step, the amount of crosslinking agent or crosslinkable resin particles to be attached can be adjusted by the first ink composition, and then the amount of colorant to be attached can be further adjusted by the second ink composition. As the second ink composition in this embodiment, the one described above may be used as the second ink composition in the inkjet composition set of this embodiment. The order of the second ink adhesion step and the first ink adhesion step is not particularly limited, and they may be performed simultaneously, or the second ink adhesion step may be performed first, or the first ink adhesion step may be performed first. It is also preferable to perform the second ink adhesion step prior to the first ink adhesion step. When the first ink composition is the above-described clear ink, by performing the second ink adhesion step prior to the first ink adhesion step, the friction fastness can be made good. Also, it is preferable that the first ink composition and the second ink composition are adhered to at least the same region on the fabric by the first ink adhesion step and the second ink adhesion step.

[0101] The adhesion amount I1 of the second ink composition in the second ink adhesion step is preferably 10 to 50 g / m 2 and more preferably 20 to 45 g / m 2 and still more preferably 30 to 42 g / m 2 By the adhesion amount of the second ink composition being within the above range, a recording material excellent in wet friction fastness and texture can be obtained.

[0102] In the present embodiment, the adhesion amount of the first ink composition may vary depending on the type of fabric to be recorded. Depending on the type of fabric, the contribution of the adhesion amount of the crosslinking agent having a crosslinkable group and the resin particles having a crosslinkable group to the wet friction fastness is different. Therefore, by varying the adhesion amount of the treatment liquid composition according to the type of fabric, there is a tendency that the wet friction fastness and the texture can be made more excellent. For example, when recording on cotton, which is relatively easy to have good wet friction fastness, by reducing the amount of the first ink composition, the adhesion amount of the crosslinking agent having a crosslinkable group and the resin particles having a crosslinkable group can be reduced, and there is a tendency that the texture of the recording material can be made better. For example, when recording on polyester, which is relatively likely to have poor wet friction fastness, by increasing the amount of the first ink composition, the adhesion amount of the crosslinking agent having a crosslinkable group and the resin particles having a crosslinkable group can be increased, and there is a tendency that the wet friction fastness of the recording material can be made better.

[0103] 5. Inkjet recording apparatus The inkjet recording apparatus in this embodiment comprises 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 a processing liquid adhesion step of ejecting a processing liquid composition by an inkjet method and adhering it to a fabric, and a first ink adhesion step of ejecting a first ink composition by an inkjet method and adhering it to a fabric. The processing liquid composition contains an acid as a flocculant for agglomerating the components in the first ink composition, and water, and the first ink composition contains a crosslinking agent having a crosslinking group and / or resin particles having a crosslinking group, a base, and water.

[0104] According to the recording device of this embodiment, recording can be performed using a treatment liquid composition containing an acid as a coagulant and a first ink composition containing a crosslinking agent having crosslinking groups and / or resin particles having crosslinking groups, thereby obtaining a recording with excellent wet friction fastness and texture.

[0105] Figure 1 is a perspective view showing the configuration of the recording device in this embodiment. The recording device 1 shown in Figure 1 is a serial printer, but the recording device in this embodiment may be a line printer. A serial printer is a device in which a head unit is mounted on a carriage that moves in the main scanning direction (horizontal direction, width direction of the recording medium), and droplets are ejected from nozzles onto the recording medium as the carriage moves. A line printer is a device in which the head is fixed and the recording medium is moved along the sub-scanning direction (vertical direction, transport direction of the recording medium), and droplets are ejected from the nozzles of the head in conjunction with this movement.

[0106] As shown in Figure 1, the recording device 1 includes a carriage 3 on which an inkjet head 2 is mounted, a carriage movement mechanism 4 that moves the carriage 3 in the recording medium width direction of the recording medium P, and a media feeding mechanism 5 that transports the recording medium P in the recording medium feeding direction. The recording device 1 also includes a control unit 6 that controls the operation of the entire recording device 1. The recording medium width direction refers to the main scanning direction (head scanning direction). The media feeding direction refers to the sub-scanning direction (direction perpendicular to the main scanning direction).

[0107] In this embodiment, the recording device 1 is exemplified as a so-called off-carriage type printer, in which the ink storage unit 10 is mounted on the housing of the recording device 1 and ink is supplied to the inkjet head 2 via the ink supply pipe 20. However, it is not limited to this. For example, a so-called on-carriage type printer, in which the ink cartridges are mounted on a carriage, may be used. It may also be used in a linehead type printer that does not have a carriage.

[0108] The control unit 6 controls liquid ejection, liquid supply, and maintenance operations. For example, it outputs a drive signal to the inkjet head 2 to control ink ejection to the recording medium. The control unit 6 may be composed of, for example, a processing circuit such as a CPU (Central Processing Unit) or FPGA (Field Programmable Gate Array) and a storage circuit such as a semiconductor memory. In particular, in this embodiment, the control unit performs a processing liquid adhesion step in which a processing liquid composition is ejected by an inkjet method and adhered to the fabric, and a first ink adhesion step in which a first ink composition is ejected by an inkjet method and adhered to the fabric. A second ink adhesion step may be performed in which a second ink composition, different from the first ink composition, is further adhered to the fabric.

[0109] In this embodiment, the control unit may vary the treatment liquid composition applied to the fabric depending on the type of fabric. The amount of crosslinking agent and crosslinkable resin particles adhering to the fabric contributes to the wet friction fastness differently depending on the type of fabric. Therefore, varying the amount of treatment liquid composition applied depending on the type of fabric tends to improve both wet friction fastness and texture. For example, when recording on cotton, which tends to have relatively good wet friction fastness, reducing the amount of the first ink composition tends to reduce the amount of crosslinking agent and crosslinkable resin particles adhering to it, thereby improving the texture of the recorded material. For example, when recording on polyester, which tends to have relatively poor wet friction fastness, increasing the amount of the first ink composition tends to increase the amount of crosslinking agent and crosslinkable resin particles adhering to it, thereby improving the wet friction fastness of the recorded material. [Examples]

[0110] The present invention will be described more specifically below using examples and comparative examples. The present invention is not limited in any way by the following examples.

[0111] Figures 2 to 4 are shown in Tables 1 to 3, which illustrate the composition of each composition in the examples and comparative examples.

[0112] 1. Preparation of each composition Each example of ink composition and processing liquid composition was obtained by placing each component into a mixing tank to achieve the composition shown in Tables 1-3, mixing and stirring, and then filtering through a membrane filter. Unless otherwise specified, the numerical values ​​for each component in the tables represent mass percent. Furthermore, in the tables, the numerical values ​​for each content represent the mass percent of the solid content of the active ingredient.

[0113] The abbreviations and product component details used in the processing solution composition are as follows: [acid] • Citric acid • Glutaric acid • H3PO4 (phosphate) • NaH2PO4·H2O (Sodium dihydrogen phosphate hydrate) [base] • KOH (potassium hydroxide) [Organic solvents] Glycerin · 1,2-Hexanediol [Surfactants] • Surfinol 465 (acetylene glycol, manufactured by Nisshin Chemical Industry Co., Ltd.) [water] ·Pure water

[0114] The abbreviations and product component details used in the ink composition are as follows: [Pigments] • Bk pigment dispersion: The following method was used to prepare the dispersion. [Resin particles] • Hydran WLS-213 (non-crosslinked polyurethane resin, DIC Corporation product name) • Takelac WS-5984 (a resin containing blocked isocyanate groups, a product name manufactured by Mitsui Chemicals, Inc.) • ETERNACOLL UW-1501F (a resin containing blocked isocyanate groups, a product name manufactured by UBE Corporation) • Takerack WS-4022 (product name manufactured by Mitsui Chemicals, Inc.) [Crosslinking agent] • Carbodilite E-02 (Carbodiimide-based crosslinking agent, product name manufactured by Nisshinbo Chemical Co., Ltd.) • Carbodilite E-05 (Carbodiimide-based crosslinking agent, product name manufactured by Nisshinbo Chemical Co., Ltd.) • Meikanate TP-10 (block isocyanate-based crosslinking agent, product name manufactured by Meisei Chemical Industry Co., Ltd.) • Epocross WS-700 (Oxazoline-based crosslinking agent, product name manufactured by Nippon Shokubai Co., Ltd.) • Epocross K-2010E (Oxazoline-based crosslinking agent, product name manufactured by Nippon Shokubai Co., Ltd.) • Epocross K-2020E (Oxazoline-based crosslinking agent, product name manufactured by Nippon Shokubai Co., Ltd.) • Epocross K-2035E (Oxazoline-based crosslinking agent, product name manufactured by Nippon Shokubai Co., Ltd.) [Organic solvents] Glycerin · 1,2-Hexanediol [Surfactants] • Surfinol 465 (acetylene glycol, manufactured by Nisshin Chemical Industry Co., Ltd.) [base] Triethanolamine [water] ·Pure water

[0115] [Preparation of Bk pigment dispersion] 500g of raw carbon black powder prepared by the furnace method (primary particle size = 18nm, BET specific surface area = 180m²) 2 A carbon black solution (186 mL / g, DBP absorption rate = 186 mL / 100 g) was added to 3750 g of deionized water. This liquid was heated to 45°C while being stirred with a dissolver. The resulting mixture was ground using a sand mill with 0.8 mm diameter zirconia beads, and 30,000 g of an aqueous solution of sodium hypochlorite (effective chlorine concentration = 12%) was added dropwise over 3.5 hours at 45°C. After addition, the mixture was further ground using a sand mill for 30 minutes to obtain a self-dispersing carbon black dispersion. This dispersion was filtered through a wire mesh with a pore size of 400 μm to remove the zirconia beads and unreacted carbon black. A 5% aqueous solution of potassium hydroxide was added to the filtrate to adjust the pH to 7.5, and then desalted and purified the dispersion using an ultrafiltration membrane until the conductivity of the dispersion was 1.5 mS / cm. Subsequently, further desalting and purification were performed using an electrodialysis apparatus until the conductivity of the liquid was 1.0 mS / cm. After purification, the treatment solution was concentrated until the concentration of self-dispersing carbon black reached 17% by mass. The resulting concentrate was subjected to a centrifuge to remove coarse particles and filtered through a 0.6 μm filter. Next, deionized water was added to the filtered concentrate, and it was diluted until the concentration of self-dispersing carbon black reached 15% by mass to obtain a Bk-dispersed pigment dispersion.

[0116] 2.Printing method Using a modified ML-8000 printer (product name manufactured by Seiko Epson Corporation), printing was performed on 100% cotton white broadcloth (#4000, manufactured by Nisshinbo Co., Ltd.) and polyester fabric by ejecting the processing liquid composition and ink composition from the head in the same pass. Multiple main scans (2, 4, 8, 12, or 16) were performed on the same scanning area to form a 20cm x 5cm solid pattern image on the recording medium (fabric). After image formation, the recordings for each example and comparative example were produced by heating in an oven at 160°C for 5 minutes and drying. The ink composition, processing liquid composition, and their adhesion amounts are shown in Tables 4 to 7. A "solid pattern image" refers to an image in which dots are uniformly formed across the entire recording area (main scanning direction x sub-scanning direction: 20cm x 5cm) so that the application amount of each liquid matches the values ​​above. The inkjet head used was a head unit with a nozzle distance of 600 dpi in the sub-scanning direction, and two head chips arranged in the sub-scanning direction with a nozzle length of 2 inches.

[0117] 3. Evaluation Method 3.1. Wet friction fastness For the recording obtained using the above printing method, a clock meter FI-306 (product name manufactured by Tester Sangyo Co., Ltd.) was used to rub a cotton cloth (white cotton cloth) over the image of the recording 10 times with a load of 9N. Next, the optical density of black in the printed image (hereinafter also referred to as "OD") was measured using a colorimeter FD-7 (product name manufactured by Konica Minolta Corporation) in the ink-contaminated area of ​​the cotton cloth, with a Status E, and evaluated according to the following criteria. If the recorded results for cotton fabrics are rated A or higher, and the recorded results for polyester fabrics are rated B or higher, it can be said that particularly good results have been achieved. (Evaluation Criteria) SS: Black OD is 0.18 or less S: Black OD is above 0.18 and below 0.25 A: Black OD is above 0.25 and below 0.32. B: Black OD is above 0.32 and below 0.40 C: Black OD is over 0.40

[0118] 3.2. Texture of the records The texture of the records obtained using the above printing method was evaluated by sensory evaluation. Specifically, five random judges were asked to touch the records and provide either a response that "it is comparable to the original feel of the fabric" or "the printed fabric is stiff and the original feel of the fabric is compromised," and these responses were evaluated according to the following criteria. Even though it received a C rating, it was still usable in practice. (Evaluation Criteria) S: Five judges responded that the fabric had "no inferiority to its original texture." A: Three to five judges responded that the fabric had "no inferiority to its original texture." B: Between 1 and 3 judges responded that the fabric's texture was "indistinguishable from the original fabric's texture." C: Zero judges responded that the fabric had "no inferiority to its original texture."

[0119] 4. Evaluation Results Tables 1 to 6 show that when an inkjet composition set comprising a processing liquid composition and a first ink composition is used, wherein the processing liquid composition contains an acid as a flocculant for agglomerating the components in the first ink composition, and water, and the first ink composition contains a crosslinking agent having crosslinkable groups and / or resin particles having crosslinkable groups, a base, and water, the resulting recorded material exhibits excellent wet friction fastness and texture. [Explanation of Symbols]

[0120] 1...Printer, 2...Inkjet head, 3...Carriage, P...Recording medium, 4...Carriage movement mechanism, 5...Media feeding mechanism, 6...Control unit, 10...Liquid container, 20...Liquid supply pipe,

Claims

1. An inkjet composition set comprising a processing liquid composition and a first ink composition, The processing liquid composition comprises an acid as a flocculant for flocculating the components in the first ink composition, and water. The first ink composition comprises a crosslinking agent having a crosslinking group and / or resin particles having a crosslinking group, a base, and water. Inkjet composition set.

2. The first ink composition includes resin particles that do not have crosslinking groups. The inkjet composition set according to claim 1.

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

4. The first ink composition is a clear ink in which the colorant content is 0.1% by mass or less relative to the total amount of the first ink composition. The inkjet composition set according to claim 1.

5. The second ink composition further comprises The second ink composition comprises a colorant, resin particles, a base, and water. The inkjet composition set according to claim 1.

6. The second ink composition further comprises a crosslinking agent having a crosslinkable group. The inkjet composition set according to claim 5.

7. 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. The inkjet composition set according to claim 3.

8. 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. The inkjet composition set according to claim 4.

9. The aforementioned crosslinking agent includes one or more selected from the group consisting of oxazoline-based crosslinking agents, carbodiimide-based crosslinking agents, and blocked isocyanate-based crosslinking agents. The inkjet composition set according to claim 1.

10. A process comprising: a process of applying a processing liquid composition to a fabric by ejecting it using an inkjet method; The process includes a first ink application step, in which a first ink composition is ejected by an inkjet method and attached to the fabric, The processing liquid composition comprises an acid as a flocculant for flocculating the components in the first ink composition, and water. The first ink composition comprises a crosslinking agent having a crosslinking group and / or resin particles having a crosslinking group, a base, and water. Inkjet recording method.

11. The amount I0 of the first ink composition applied in the first ink application step is 15 to 70 g / m². 2 That is, The inkjet recording method according to claim 10.

12. The process includes a second ink application step in which a second ink composition is ejected by an inkjet method and attached to the fabric, The second ink composition contains a colorant, resin particles, a base, and water. The inkjet recording method according to claim 10.

13. The amount I1 of the second ink composition applied in the second ink application step is 10 to 50 g / m². 2 That is, The inkjet recording method according to claim 12.

14. An inkjet head that ejects liquid using the inkjet method and adheres it to the fabric, The system comprises a control unit for controlling the discharge of the liquid, An inkjet recording device, The control unit, A process comprising: a process of applying a processing liquid composition to a fabric by ejecting it using an inkjet method; The first ink application step is performed, in which the first ink composition is ejected by an inkjet method and attached to the fabric. The processing liquid composition comprises an acid as a flocculant for flocculating the components in the first ink composition, and water. The first ink composition comprises a crosslinking agent having a crosslinking group and / or resin particles having a crosslinking group, a base, and water. Inkjet recording device.

15. The control unit varies the amount of the first ink composition that adheres to the fabric depending on the type of fabric. The inkjet recording apparatus according to claim 14.

Images