Inkjet recording method

Abstract

The invention provides an ink jet recording method. A printed material obtained by the ink jet recording method has excellent print penetration resistance. An ink jet recording method includes: a treatment liquid attachment step of attaching a treatment liquid containing an organic acid and water to an arbitrary portion of a fabric by an ink jet method; a colored ink attachment step of attaching droplets of a colored ink composition containing a pigment, anionic first resin particles, and water to an arbitrary portion by an ink jet method; and a clear ink attachment step of attaching droplets of a clear ink composition containing anionic second resin particles and water to the arbitrary site by an ink jet method, in the treatment liquid attachment step, the amount of acidic groups derived from the organic acid attached to the arbitrary site is 4.5 mmol / m2 or more, and the amount of the acidic groups derived from the organic acid attached to the arbitrary site is 4.5 mmol / m2 or more. The shortest time difference [alpha] from the time when one of the colored ink composition and the treatment liquid composition adheres to an arbitrary site to the time when the other adheres to the arbitrary site is within 5 min.

Description

Technical Field

[0001] The present invention relates to an inkjet recording method. Background Art

[0002] Inkjet recording methods can record high-definition images using relatively simple equipment, and have achieved rapid development in various fields. Among these, various studies have been conducted on color development and durability. For example, Patent Document 1 discloses a method for producing printed materials, which aims to provide printed materials that suppress bleeding and exhibit excellent friction properties. The method comprises: applying ink containing a coloring material and water to a recording medium by inkjet printing; applying a treatment liquid A to the recording medium applied with the ink; and applying a treatment liquid B to the recording medium applied with the treatment liquid A, wherein the treatment liquid B contains a water-dispersible resin and the treatment liquid A contains a coagulant for agglomerating the water-dispersible resin in the treatment liquid B.

[0003] Patent Document 1: Japanese Patent Application Laid-Open No. 2022-180836

[0004] However, in the recording method using the conventional structure such as that disclosed in Patent Document 1, there is room for improvement in strike-through resistance and friction fastness of the resulting printed material. Summary of the Invention

[0005] The inkjet recording method of the present invention comprises: a treatment liquid attaching step of attaching a treatment liquid composition containing an organic acid and water to an arbitrary portion on a fabric by an inkjet method; a colored ink attaching step of attaching droplets of a colored ink composition containing a pigment, anionic first resin particles, and water to the arbitrary portion by an inkjet method; and a transparent ink attaching step of attaching droplets of a transparent ink composition containing anionic second resin particles and water to the arbitrary portion by an inkjet method, wherein in the treatment liquid attaching step, the amount of acidic groups derived from the organic acid attached to the arbitrary portion is 4.5 mmol / m 2 As described above, the shortest time difference |α| from when one of the colored ink composition and the treatment liquid composition adheres to the arbitrary portion to when the other adheres to the arbitrary portion is within 5 minutes. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 Table 1 shows the compositions of the treatment liquids used in Examples.

[0007] Figure 2 Table 2 shows the compositions of the colored ink compositions used in Examples.

[0008] Figure 3 Table 3 shows the compositions of the clear ink compositions used in Examples.

[0009] Figure 4 Table 4 shows the structure of each composition and recording method used in Examples, as well as the evaluation results thereof.

[0010] Figure 5 Table 5 shows the structure of each composition and recording method used in Examples, as well as the evaluation results thereof.

[0011] Figure 6 Table 6 shows the structure of each composition and recording method used in Examples, as well as the evaluation results thereof.

[0012] Figure 7 Table 7 shows the structure of each composition and recording method used in Comparative Examples, and the evaluation results thereof.

[0013] Figure 8 Table 8 shows the structures of the compositions and recording methods used in Examples and Comparative Examples, as well as the evaluation results thereof.

[0014] Figure 9 This is a diagram showing an example of a recording device used in the recording method of this embodiment.

[0015] Description of Reference Numerals

[0016] 1: Printer; 2: Fabric; 3: Inkjet head; 4: Slide; 5: Main scanning mechanism; 6: Platen roller; 7a, 7b, 7c, 7d, 7e, 7f: Liquid cartridge; 8: Timing belt; 9: Motor; 10: Guide shaft. DETAILED DESCRIPTION

[0017] Hereinafter, an embodiment of the present invention (hereinafter referred to as the "present embodiment") will be described in detail with reference to the accompanying drawings as needed. However, the present invention is not limited thereto and various modifications are possible without departing from the spirit and scope of the present invention. It should be noted that in the accompanying drawings, identical elements are denoted by identical reference numerals, and duplicate descriptions are omitted. Furthermore, positional relationships, such as up and down, left and right, are based on those shown in the accompanying drawings unless otherwise specified. Furthermore, dimensional ratios in the accompanying drawings are not limited to those shown.

[0018] Inkjet recording method

[0019] The inkjet recording method according to the present embodiment (hereinafter also referred to as the present recording method) includes: a treatment liquid attaching step of attaching a treatment liquid composition containing an organic acid and water to an arbitrary portion of a fabric by an inkjet method; a colored ink attaching step of attaching droplets of a colored ink composition containing a pigment, anionic first resin particles, and water to an arbitrary portion by an inkjet method; and a transparent ink attaching step of attaching droplets of a transparent ink composition containing anionic second resin particles and water to an arbitrary portion by an inkjet method. In the treatment liquid attaching step, the amount of the acidic group derived from the organic acid attached to the arbitrary portion is 4.5 mmol / m 2 As described above, the shortest time difference |α| from when one of the color ink composition and the treatment liquid composition adheres to the aforementioned arbitrary portion to when the other adheres to the arbitrary portion is within 5 minutes.

[0020] In recent years, research has been underway in inkjet pigment printing to utilize a single recording device to perform both the pre-treatment liquid process and the ink adhesion process, aimed at reducing ink bleeding and improving color development. Such methods simplify the process and eliminate waste liquid discharge. In particular, the wet-on-wet method, which eliminates the drying process between the treatment liquid adhesion process and the ink adhesion process, offers advantages in terms of device miniaturization and high speed.

[0021] In the treatment liquid, organic acids and polyvalent metal salts are used as coagulants to aggregate the ink. While polyvalent metal salts have strong cohesive forces, tending to produce records with improved color development and suppressed show-through, the resulting records tend to have reduced wet friction fastness. On the other hand, organic acids neutralize the anionic components of the ink, reducing their hydrophilicity, resulting in records with excellent wet friction fastness. Furthermore, the use of organic acids disrupts the dispersion of the anionic components, causing them to aggregate near the surface of the fabric, which has also been shown to improve color development to a certain extent. However, the cohesive force of the ink components, resulting from the disruption of dispersion by organic acids, is relatively weak, and this can sometimes cause the colorant to penetrate the fabric, allowing the ink to reach the backside (hereinafter referred to as "show-through").

[0022] The main cause of strike-through is not particularly limited, but it is presumed that the main cause is that the treatment liquid containing the organic acid dries before the ink lands, thereby reducing the effects of neutralization reaction and dispersion destruction by the acid.

[0023] Therefore, in the present invention, by allowing the treatment liquid containing a predetermined amount of an organic acid as a coagulant and the colored ink containing an anionic resin to adhere for less than 5 minutes, adhesion can be achieved using a wet-on-wet method. This allows the neutralization reaction with the organic acid to proceed smoothly, promoting coagulation, thereby suppressing print-through and further improving color development.

[0024] The main reason for this is that the treatment liquid and the ink adhere to each other in a short time and are easily mixed. Furthermore, the amount of acidic groups contained in the treatment liquid is 4.5 mmol / m 2 The above organic acids, when contained in the colored ink, contain anionic resins, which facilitate rapid aggregation reaction near the surface of the fabric. However, the main reason for this is not limited to the above reasons.

[0025] In the present invention, a clear ink containing an anionic resin is further added to the colored ink composition, and a film is formed from the clear ink composition by utilizing the effect of the organic acid in the reaction solution, thereby further improving the wet friction fastness.

[0026] In this specification, "arbitrary portion" refers to a region of the fabric to which the treatment liquid composition, the colored ink composition, and the clear ink composition are attached. In this arbitrary portion, layers formed of the above compositions may be attached in a partially or completely overlapping state.

[0027] This recording method is performed on fabrics. Examples of the raw materials of the fabrics include natural fibers such as cotton, linen, wool, and silk; synthetic fibers such as polypropylene, polyester, acetate, triacetate, polyamide, and polyurethane; and biodegradable fibers such as polylactic acid. Blends of these fibers are also possible.

[0028] The fabric preferably has hydroxyl groups. Examples of such fabrics include fabrics containing cellulose such as cotton and linen, and fabrics containing polyurethane. When the fabric has hydroxyl groups, a cross-linking reaction can occur between the acidic component contained in the treatment liquid composition described later and the hydroxyl groups of the fabric, tending to achieve improved color development due to thickening and aggregation, and improved frictional fastness due to enhanced adhesion between the fabric and the recording layer.

[0029] In this recording method, the order in which the treatment liquid adhesion step, the colored ink adhesion step, and the clear ink adhesion step are performed is not particularly limited. For example, as needed, the clear ink adhesion step may be performed after the treatment liquid adhesion step and the colored ink adhesion step are performed simultaneously, or the treatment liquid adhesion step may be performed followed by the colored ink adhesion step and the clear ink adhesion step.

[0030] It should be noted that the term "simultaneously" used herein means, for example, that the minimum time difference between the deposition of each composition at any location is within 1 second. Specifically, in an apparatus configuration, two or more inkjet heads are used, each having a nozzle array for discharging a treatment liquid, a nozzle array for discharging a colored ink, and a nozzle array for discharging a transparent ink. When two or more of the treatment liquid, colored ink, and transparent ink are discharged from each nozzle array while the inkjet head and the fabric are scanned relative to each other, the deposition is considered to be simultaneous, with virtually no order of deposition.

[0031] In this recording method, the shortest time difference |α| between the time when one of the colored ink composition and the treatment liquid composition adheres to any location and the time when the other adheres to any location is within 5 minutes. By setting the time difference |α| to within 5 minutes, the treatment liquid contacts the colored ink composition before drying, allowing a neutralization reaction to occur. This results in a printed product with excellent strike-through suppression, color development, and friction fastness. From a similar perspective, the time difference |α| is preferably within 1 minute, within 1 second, within 100 milliseconds, or within 10 milliseconds. The lower limit of the time difference |α| is not particularly limited, as it includes the case of substantially simultaneous adhesion as described above, but can be, for example, from 0 seconds to 1 millisecond.

[0032] In this recording method, the shortest time difference |β| from the time one of the colored ink composition and the clear ink composition adheres to any location on the fabric to the time the other adheres to any location on the fabric is preferably 1.0 sec to 5.0 sec, 1.5 sec to 4.5 sec, or 2.0 sec to 4.0 sec. When the time difference |β| falls within this range, frictional fastness tends to be further improved.

[0033] Hereinafter, each step and each composition included in this recording method will be described in detail.

[0034] 1. Treatment liquid adhesion process

[0035] The recording method includes a step of attaching a treatment liquid composition containing an organic acid and water to an arbitrary portion of a fabric by an inkjet method, wherein the amount of acidic groups derived from the organic acid attached to the arbitrary portion is 4.5 mmol / m 2 Specifically, the inkjet head can be used to spray droplets of the treatment liquid composition to any part of the fabric to make it adhere. It should be noted that the acidic group content in at least a part of the region where the treatment liquid composition is adhered is 4.5 mmol / m 2 It is sufficient to be above 4.5 mmol / m2 in the entire region. 2 above.

[0036] The amount of acidic groups derived from organic acids is preferably 6.0 to 60 mmol / m 2 10~50mmol / m 2 , 15~40mmol / m 2 By setting the amount of the acidic groups derived from organic acids attached to the fabric within the above range, the neutralization reaction with the ink composition proceeds easily, and the resulting printed fabric tends to have excellent friction fastness, color development, and strike-through resistance. It should be noted that the method for measuring the amount of the acidic groups derived from organic acids is not particularly limited, and for example, it can be measured using an acid-base titration method. Examples of the acidic groups derived from organic acids include the acidic groups derived from organic acids described below. Examples of the acidic groups include carboxyl groups and phosphate groups.

[0037] The amount X of the treatment liquid applied is preferably 5 to 90 g / m2 per unit area of ​​the recording region of the fabric. 2 10~80g / m 2 , 15~60g / m 2 , 17~30g / m 2 If the amount X of the treatment liquid applied is within the above range, the resulting printed product tends to have better friction fastness and strike-through resistance. It should be noted that in this specification, the amount of application and the amount of coating are the same value.

[0038] 1.1. Treatment fluid composition

[0039] The treatment liquid composition used in this recording method contains an organic acid and water. It should be noted that the treatment liquid is distinct from the colored ink composition used for coloring fabrics and the clear ink composition (overcoat liquid) used for protecting printed areas (described later). It is an auxiliary liquid used with these compositions. The treatment liquid can be used as long as it can aggregate or thicken the components of the colored ink composition and clear ink composition.

[0040] 1.1.1. Organic acids

[0041] The organic acid contained in the processing liquid of this recording method is preferably 5000 or less, 4000 or less, or 3000 or less. By setting the molecular weight of the organic acid within the above range, there is a tendency for better friction fastness, strike-through resistance, and color development. It should be noted that the organic acid can be used alone or in combination of two or more.

[0042] Specific examples of organic acids include lactic acid, succinic acid, phosphoric acid, polyacrylic acid, acetic acid, glycolic acid, malonic acid, malic acid, maleic acid, ascorbic acid, glutaric acid, fumaric acid, citric acid, tartaric acid, sulfonic acid, orthophosphoric acid, pyrrolidonecarboxylic acid, pyronecarboxylic acid, pyrrolecarboxylic acid, furancarboxylic acid, pyridinecarboxylic acid, coumaric acid, thiophenefuric acid, nicotinic acid, or derivatives of these compounds or salts thereof. Among these, from the viewpoint of improving strike-through resistance, color development, and friction fastness of printed materials, it is preferred to contain one or more selected from the group consisting of lactic acid, succinic acid, phosphoric acid, and polyacrylic acid.

[0043] The content of the organic acid is preferably 1.0-30.0% by mass, 1.5-20.0% by mass, 3.0-15.0% by mass, or 7.0-15.0% by mass relative to the total amount of the treatment liquid composition. When the organic acid content is within the above range, friction fastness, anti-printing properties, and color development properties tend to be improved.

[0044] 1.1.2. Organic solvents

[0045] The treatment liquid may contain an organic solvent. The organic solvent is not particularly limited as long as it is water-soluble, and examples thereof include polyvalent alcohols, glycol ethers, nitrogen-containing solvents, ethers, and cyclic esters. Of these, polyvalent alcohols are preferred from the perspective of further improving friction fastness, anti-print-through properties, and color development. It should be noted that the organic solvent may be used singly or in combination of two or more.

[0046] Polyvalent alcohols can be classified into, for example, polyols and alkanediols. Specific examples of polyol compounds include glycerol, ethylene glycol, propylene glycol, 1,2-propylene glycol, 1,2-butylene glycol, 1,3-propylene glycol, 1,4-butylene glycol, diethylene glycol, triethylene glycol, dipropylene glycol, and trimethylolpropane. To more effectively and reliably achieve the effects of the present invention, it is preferred that the treatment liquid contain at least one of glycerol or propylene glycol.

[0047] Specific examples of alkanediol compounds include 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, and 2-methylpentane-2,4-diol.

[0048] Specific examples of glycol ether compounds include 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-tert-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.

[0049] The content of the organic solvent is preferably 10-50 mass%, 15-45 mass%, or 20-40 mass% relative to the total amount of the treatment liquid composition. When the content of the organic solvent is within the above range, friction fastness, anti-printing properties, and color development tend to be better.

[0050] From the same viewpoint, the content of the multivalent alcohol or polyol is preferably 10 to 50% by mass, 15 to 45% by mass, or 20 to 40% by mass relative to the total amount of the treatment liquid composition.

[0051] 1.1.3. Surfactants

[0052] The treatment liquid may contain a surfactant. Examples of the surfactant include acetylene glycol-based surfactants, fluorine-based surfactants, and silicone-based surfactants, with acetylene glycol-based surfactants being preferred. By using an acetylene glycol-based surfactant, the effects of the present invention can be more effectively and reliably exerted. It should be noted that one surfactant may be used alone, or two or more surfactants may be used in combination.

[0053] Examples of the acetylene glycol-based surfactants include SURFYNOL 104, 104E, 104H, 104A, 104BC, 104DPM, 104PA, 104PG-50, 104S, 420, 440, 465, 485, SE, SE-F, 504, 61, DF37, CT111, CT121, CT131, CT136, TG, GA, and DF110D (all trade names, manufactured by Air Products Japan Co., Ltd.), and OLFINE B, Y, P, A, STG, SPC, E1004, E1010, PD-001, PD-002W, PD-003, PD-004, EXP.4001, EXP.4036, EXP.4051, AF-103, AF-104, AK-02, SK-14, AE-3 (all trade names, manufactured by Nissin Chemical Industry Co., Ltd.), ACETYLENOL E00, E00P, E40, E100 (all trade names, manufactured by Kawaken Fine Chemicals Co., Ltd.). From the viewpoint of more effectively and reliably exhibiting the effects of the present invention, OLFINE E1010 is preferably used.

[0054] The surfactant content is preferably 0.1-5.0 mass%, 0.5-3.0 mass%, or 0.8-2.0 mass% relative to the total amount of the treatment liquid composition. When the surfactant content in the treatment liquid is within the above range, the effects of the present invention can be more effectively and reliably achieved.

[0055] 1.1.4. Water

[0056] The treatment liquid contains water. As water, water from which ionic impurities have been removed as much as possible is preferred. Examples of such water include pure water such as ion-exchanged water, ultrafiltered water, reverse osmosis water, and distilled water, as well as ultrapure water.

[0057] The water content is preferably 30-90% by mass, more preferably 40-80% by mass, and even more preferably 50-75% by mass relative to the total amount of the treatment liquid composition. By setting the water content in the treatment liquid within the above range, the effects of the present invention can be more effectively and reliably exerted.

[0058] 1.1.5. Antimicrobial agents

[0059] The treatment liquid may also contain an antibacterial agent. Examples of such antibacterial agents include sodium benzoate, sodium pentachlorophenol, sodium 2-pyridinethiol-1-oxide, sodium sorbate, sodium dehydroacetate, 1,2-dibenzisothiazolin-3-one (trade names: Proxel CRL, Proxel BDN, Proxel GXL, Proxel XL2, Proxel TN, Proxel LV from Lonza Japan), and 4-chloro-3-methylphenol (e.g., Preventol CMK from Bayer). Proxel XL2 is preferred.

[0060] The content of the antimicrobial agent in the treatment liquid is preferably 0.01 to 1.0% by mass, more preferably 0.1 to 0.5% by mass, and even more preferably 0.2 to 0.4% by mass relative to the total amount of the treatment liquid composition. By adjusting the content of the antimicrobial agent within the above range, the effects of the present invention can be more effectively and reliably exerted.

[0061] 1.1.6. Other ingredients

[0062] The processing liquid used in the present recording method may contain various additives such as a pH adjuster, a metal sealant, a softener, a solubilizing agent, a viscosity adjuster, an ultraviolet absorber, an antioxidant, and an anticorrosive agent as components other than those mentioned above, as needed.

[0063] 2. Color ink adhesion process

[0064] This recording method includes a colored ink deposition step of depositing droplets of a colored ink composition containing a pigment, anionic first resin particles, and water onto arbitrary locations on a fabric. Specifically, the droplets of the colored ink composition can be deposited by ejecting them from an inkjet head onto arbitrary locations on the fabric. A pre-applied treatment liquid can be reacted with the colored ink at arbitrary locations on the fabric, or the treatment liquid can be reacted after the pre-applied colored ink has been applied.

[0065] In the present recording method, the amount Y of the color ink composition deposited per unit area in the recording area to which the color ink is deposited is preferably 10 g / m 2 By satisfying such a relationship, the obtained printed and dyed product has a tendency to have better friction fastness. From the same point of view, the adhesion amount Y is more preferably 10~45g / m 2 , 20~40g / m 2 , 17~80g / m 2 The adhesion amount Y per unit area of ​​the colored ink composition is 10 g / m 2 In the above case, sometimes the print through and fastness are disadvantageous. However, according to the present recording method, the adhesion amount Y per unit area of ​​the colored ink composition is 10 g / m 2In the above region, the amount of acidic groups derived from organic acids is 4.5 mmol / m 2 As described above, the strike-through resistance and the friction fastness can be improved.

[0066] 2.1. Colored ink composition

[0067] The colored ink composition contains a pigment, anionic first resin particles, and water. The anionic first resin particles in the colored ink composition react with the acidic component in the treatment liquid, reducing their affinity for water and causing them to aggregate near the surface. This results in improved friction fastness, color development, and strike-through resistance.

[0068] Pigments

[0069] Examples of pigments include azo pigments (e.g., azo lakes, insoluble azo pigments, condensed azo pigments, and chelated azo pigments), polycyclic pigments (e.g., phthalocyanine pigments, perylene pigments, perinone pigments, anthraquinone pigments, quinacridone pigments, dioxazine pigments, thioindigo pigments, isoindolinone pigments, and quinophthalone pigments), organic pigments such as nitro pigments, nitroso pigments, and aniline black; inorganic pigments such as carbon black (e.g., furnace black, heat lamp black, acetylene black, and channel black); metal oxides, metal sulfides, and metal chlorides; and extender pigments such as calcium carbonate and talc. Among these, carbon black is preferably used as an inorganic pigment to more effectively and reliably achieve the effects of the present invention. It should be noted that the pigments may be used alone or in combination of two or more.

[0070] The pigment is preferably a self-dispersible pigment. By containing a self-dispersible pigment, the neutralization reaction with the organic acid in the treatment liquid is facilitated, and the anti-printing property, friction fastness, and color development property tend to be improved.

[0071] Examples of carbon blacks include CI (Colour Index Generic Name) Pigment Black 1, 7, and 11. Commercially available carbon blacks include Mitsubishi Chemical's No. 2300, No. 900, MCF88, No. 33, No. 40, No. 45, No. 52, MA7, MA8, MA100, and No. 2200B; Columbia Carbon's Raven (registered trademark) 5750, 5250, 5000, 3500, 1255, and 700; CABOT's Rega1 (registered trademark) 400R, 330R, and 660R; Mogul (registered trademark) L; Monarch (registered trademark) 700, 800, 880, 900, 1000, 1100, 1300, and 1400; and Degussa's Color Black. FW1, FW2, FW2V, FW18, FW200, S150, S160, S170, Printex (registered trademark) 35, U, V, 140U, Special Black 6, 5, 4A, 4, etc. In addition, those prepared by the method described in the Examples described below are preferably used.

[0072] The content of the pigment in the colored ink is preferably 1-10% by mass, 2-8% by mass, or 3-7% by mass relative to the total amount of the colored ink composition. By keeping the pigment content within the above range, the effects of the present invention can be more effectively and reliably exerted. It should be noted that the pigment content in the above colored ink is based on the mass % of the pigment solids content.

[0073] 2.1.2. Anionic First Resin Particles

[0074] Examples of the anionic first resin particles include those whose constituent resins have anionic groups. Examples of the anionic groups include sulfonic acid groups, carboxyl groups, phosphoric acid groups, and hydroxyl groups. It should be noted that the resin particles are particles containing resin, and while both emulsion and solution forms can be used, emulsion forms are preferred from the perspective of suppressing increases in ink viscosity.

[0075] More specifically, examples of the anionic first resin particles include urethane resins, polycarbonate resins, (meth)acrylic resins, styrene resins, silicone resins, 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. Among these, urethane resins are preferred from the viewpoint of more effectively and reliably exhibiting the effects of the present invention.

[0076] Urethane resins are resins containing urethane bonds within their molecules. Examples of urethane resins include, in addition to urethane bonds, polyether-type urethane resins containing ether bonds in the main chain, polyester-type urethane resins containing ester bonds in the main chain, and polycarbonate-type urethane resins containing carbonate bonds in the main chain. Specific commercially available products include ETERNACOLLUW-1501F, UW-1527F, and UW-5002 (all trade names of Ube Industries, Ltd.), TAKELAC WS-5000, W-6061, W-6110, WS-5984, and WS-5100 (all trade names of Mitsui Chemicals, Inc.), PERMARIN UA-150, UA-200, and UCOAT UX-390 (all trade names of Sanyo Chemical Industries, Ltd.), and HYDRAN WLS-210 (all trade names of DIC Corporation). Among them, from the viewpoint of more effectively and reliably exhibiting the effects of the present invention, polycarbonate-type urethane resins are preferred, and UW-1527F is preferred as a commercially available product thereof.

[0077] The content of the anionic first resin particles in the colored ink is preferably 1-15% by mass, 3-10% by mass, or 5-7% by mass relative to the total amount of the colored ink composition. By adjusting the content of the anionic first resin particles within this range, the effects of the present invention can be more effectively and reliably achieved. It should be noted that the above content is based on the mass % of the solid content of the anionic first resin particles.

[0078] 2.1.3. Organic solvents

[0079] The colored ink may contain an organic solvent. The organic solvent is not particularly limited as long as it is water-soluble, and the same type as that used in the treatment liquid can be used. Polyvalent alcohols and glycol ethers are preferred.

[0080] The colored ink preferably contains glycerin as a polyvalent alcohol organic solvent and triethylene glycol monobutyl ether as a glycol ether organic solvent. By containing these compounds, the effects of the present invention can be more effectively and reliably exerted.

[0081] The content of the organic solvent in the colored ink is preferably 5-30% by mass, 10-25% by mass, or 15-20% by mass relative to the total amount of the colored ink composition. When the organic solvent content is within the above range, friction fastness, strike-through resistance, and color development tend to be more excellent.

[0082] From the same viewpoint, the content of the polyvalent alcohol is preferably 5-30% by mass or 10-25% by mass relative to the total amount of the colored ink composition, and the content of the glycol ether is preferably 0.5-5% by mass or 1-3% by mass relative to the total amount of the colored ink composition.

[0083] 2.1.4. pH adjusters

[0084] The colored ink composition may contain a pH adjuster. The pH adjuster is not particularly limited, and examples thereof include acids, bases, and appropriate combinations of weak acids and weak bases. Examples of such acids and bases include inorganic acids such as sulfuric acid, hydrochloric acid, and nitric acid, and inorganic bases such as lithium hydroxide, sodium hydroxide, potassium hydroxide, potassium dihydrogen phosphate, disodium hydrogen phosphate, potassium carbonate, sodium carbonate, sodium bicarbonate, and ammonia. Examples of the organic base include triethanolamine (TEA), diethanolamine, monoethanolamine, tripropanolamine, triisopropanolamine, diisopropanolamine, and tris(hydroxymethyl)aminomethane (THAM). Examples of the organic acid include adipic acid, citric acid, succinic acid, lactic acid, N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid (BES), 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES), morpholineethanesulfonic acid (MES), carbamoylmethyliminodiacetic acid (ADA), piperazine-1,4-bis(2-ethanesulfonic acid) (PIPES), N-(2-acetamido)-2-aminoethanesulfonic acid (ACES), choline chloride, N-tris(hydroxymethyl)methyl-2-aminoethanesulfonic acid (TES), acetamidoglycine, tris(hydroxymethyl)methylglycine, glycineamide, and N,N-bicine, as well as Good's buffers, phosphate buffers, citrate buffers, and Tris buffers. Among these, triethanolamine is preferred from the viewpoint of more effectively and reliably exhibiting the effects of the present invention.

[0085] The content of the pH adjuster in the colored ink is preferably 0.1-5 mass%, 0.3-3 mass%, or 0.5-1.5 mass% relative to the total amount of the colored ink composition. By setting the pH adjuster content within the above range, the effects of the present invention can be more effectively and reliably achieved.

[0086] Regarding the surfactant, antibacterial agent, water, and other components that may be contained in the colored ink, the same types as those used in the above-mentioned treatment liquid composition can be used within the same content range.

[0087] 3. Transparent ink adhesion process

[0088] This recording method includes a clear ink deposition step of depositing droplets of a clear ink composition containing anionic second resin particles and water onto arbitrary locations using an inkjet method. Specifically, the clear ink composition droplets can be deposited by jetting them onto arbitrary locations on the fabric using an inkjet head. The droplets can be deposited onto arbitrary locations on the fabric simultaneously with a treatment liquid or colored ink, or by mixing them with a pre-applied treatment liquid or colored ink. Depositing the clear ink composition provides excellent frictional fastness.

[0089] The adhesion amount Z of the transparent ink is preferably 5 to 50 g / m2 per unit area of ​​the recording area of ​​the cloth. 2 , 10~45g / m 2 , 20~40g / m 2 , 17~80g / m 2 When the amount Z of the transparent ink deposited is within the above range, the resulting printed product tends to have better friction fastness and strike-through resistance.

[0090] In this recording method, the amount X of the treatment liquid deposited per unit area, the amount Y of the colored ink composition deposited per unit area, and the amount Z of the clear ink composition deposited per unit area preferably satisfy the relationship of the following formula (1). Satisfying this relationship tends to result in a printed product with superior color development. From the same perspective, the value of (Y + Z) / X is preferably 1.2 or greater, and more preferably 1.4 or greater.

[0091] (Y+Z) / X≥1.1…(1)

[0092] In this recording method, it is preferred that the area A of the first region to which the treatment liquid adheres, the area B of the second region to which the colored ink composition adheres, and the area C of the third region to which the transparent ink composition adheres satisfy the relationship expressed by the following formula (2). Satisfying this relationship tends to result in a printed product having superior friction fastness, color development, and strike-through resistance.

[0093] C≥A≥B…(2)

[0094] 3.1. Transparent ink composition

[0095] The clear ink composition contains anionic second resin particles and water.

[0096] 3.1.1. Anionic Second Resin Particles

[0097] The anionic second resin particles contained in the clear ink composition are not particularly limited, and the same resin particles as the anionic first resin particles used in the above-mentioned colored ink composition can be used.

[0098] The content of the anionic second resin particles in the clear ink composition is preferably 3 to 30% by mass, 5 to 20% by mass, or 7 to 15% by mass relative to the total amount of the clear ink composition. By setting the content of the anionic second resin particles within the above ranges, the effects of the present invention can be more effectively and reliably achieved.

[0099] 3.1.2. Organic solvents

[0100] The transparent ink may also contain an organic solvent. The organic solvent is not particularly limited as long as it is water-soluble, and the same type of solvent used in the treatment liquid can be used. Polyvalent alcohols and glycol ethers are preferred.

[0101] The transparent ink preferably contains glycerin as a polyvalent alcohol organic solvent and triethylene glycol monobutyl ether as a glycol ether organic solvent. By containing these compounds, the effects of the present invention can be more effectively and reliably exerted.

[0102] The content of the organic solvent in the clear ink is preferably 5-40% by mass, 10-30% by mass, or 15-25% by mass relative to the total amount of the clear ink composition. When the organic solvent content is within these ranges, friction fastness, strike-through resistance, and color development tend to be improved.

[0103] From the same viewpoint, the content of the polyvalent alcohol is 5 to 40% by mass, preferably 10 to 30% by mass, and the content of the glycol ether is 0.5 to 5% by mass, preferably 1 to 3% by mass, relative to the total amount of the clear ink composition.

[0104] The surfactant, organic solvent antimicrobial agent, water, and other components that may be included in the clear ink can be used in the same content ranges as those used in the treatment liquid composition described above. Furthermore, the pH adjuster can be used in the same content ranges as those used in the colored ink composition described above.

[0105] 4. Other processes

[0106] This recording method may include steps other than the aforementioned treatment liquid deposition step, colored ink deposition step, and clear ink deposition step. For example, after the aforementioned steps, a step of heating the fabric may be included. The heating method is not particularly limited, and examples thereof include hot pressing, atmospheric steam deposition, high-pressure steam deposition, and thermosetting.

[0107] 5. Inkjet recording device

[0108] Reference Figure 9 , an example of an inkjet printing apparatus including an inkjet head that can be applied to the recording method according to this embodiment will be described.

[0109] The inkjet printing device used in the following description is a serial printer. This printer features a recording inkjet head mounted on a carriage that moves in a predetermined direction. The inkjet head moves with the carriage, ejecting droplets onto fabric. The inkjet printing device applicable to the recording method described in this embodiment is not limited to serial printers; a line printer may also be used. A line printer is a printer in which the inkjet head is wider than the width of the fabric and ejects droplets onto the fabric without moving the inkjet head.

[0110] An inkjet printing apparatus is an apparatus that performs printing by causing the droplets to land on fabric using an inkjet head as a liquid ejecting unit that ejects minute droplets of an ink composition and a processing liquid. Figure 9 This is a schematic perspective view showing an inkjet printing device used in the embodiment.

[0111] like Figure 9 As shown, in this embodiment, the printer 1 includes a control unit (not shown) that controls the operation of the inkjet head 3, carriage 4, main scanning mechanism 5, platen roller 6, and the entire printer 1. The carriage 4 mounts the inkjet head 3 and is removable from liquid cartridges 7a, 7b, 7c, 7d, 7e, and 7f that store the ink composition and processing liquid supplied to the inkjet head 3.

[0112] The main scanning mechanism 5 includes a timing belt 8 connected to the carriage 4, a motor 9 that drives the timing belt 8, and a guide shaft 10. The guide shaft 10 serves as a support member for the carriage 4 and is mounted in the scanning direction of the carriage 4, i.e., the main scanning direction MS. The carriage 4 is driven by the motor 9 via the timing belt 8 and is capable of reciprocating along the guide shaft 10. Thus, the main scanning mechanism 5 functions to reciprocate the carriage 4 in the main scanning direction MS.

[0113] The platen roller 6 has the function of conveying the printed fabric 2 in a sub-scanning direction SS, which is perpendicular to the main scanning direction MS, i.e., in the longitudinal direction of the fabric 2. Thus, the fabric 2 is conveyed in the sub-scanning direction SS. The carriage 4, on which the inkjet head 3 is mounted, is configured to reciprocate in the main scanning direction MS, which is substantially aligned with the width of the fabric 2. The inkjet head 3 is configured to scan relative to the fabric 2 in both the main scanning direction MS and the sub-scanning direction SS.

[0114] Liquid boxes 7a, 7b, 7c, 7d, 7e, and 7f are six independent liquid boxes. Liquid boxes 7a, 7b, 7c, 7d, 7e, and 7f can store ink compositions and processing liquids used in the recording method of this embodiment. These liquid boxes store ink compositions and processing liquids in colors such as black, cyan, magenta, yellow, white, and orange, respectively, and can be used in any combination. Figure 9In the embodiment, the number of liquid cartridges is 6, but not limited thereto. Liquid cartridges 7a, 7b, 7c, 7d, 7e, and 7f are provided with supply openings (not shown) at the bottom thereof for supplying the ink composition or treatment liquid contained in each liquid cartridge to the inkjet head 3.

[0115] The inkjet head 3 is a mechanism that, under the control of a control unit (not shown), ejects the ink composition and treatment liquid supplied from liquid cartridges 7a, 7b, 7c, 7d, 7e, and 7f from multiple nozzles onto the fabric 2, depositing them. The inkjet head 3 includes multiple nozzles that eject the ink composition and treatment liquid onto the surface of the fabric 2 facing the surface where the ink composition and treatment liquid adhere to the fabric 2. These multiple nozzles are arranged in a row, forming a nozzle array, with each nozzle array configured to correspond to the color of the ink composition and treatment liquid. Each color of ink composition and treatment liquid is supplied from each liquid cartridge to the inkjet head 3 and ejected as droplets from the nozzles by an actuator (not shown) within the inkjet head 3. The ejected droplets of ink composition and treatment liquid land on the fabric 2, forming an image, text, pattern, color, or other ink image on the printed area of ​​the fabric 2. Note that multiple inkjet heads 3 may be provided on the carriage 4.

[0116] Here, a piezoelectric element is used as the driving unit, i.e., the actuator, in the inkjet head 3, but the present invention is not limited to this embodiment. For example, an electromechanical transducer element that displaces a vibrating plate as an actuator through electrostatic attraction, or an electrothermal transducer element that ejects the ink composition as droplets using bubbles generated by heating, may also be used.

[0117] The inkjet head 3 includes a treatment liquid nozzle group that ejects a treatment liquid and an ink composition nozzle group that ejects an ink composition. The ejection nozzle group refers to the nozzle group used for recording during the recording process. During main scanning, if the image to be recorded exists in the area of ​​the fabric opposite the nozzle group, the nozzle group is capable of ejecting ink, etc., and is a continuous nozzle group in the sub-scanning direction SS. Therefore, while the nozzle group itself exists, nozzle groups not used for recording during the recording process are not included in the ejection nozzle group.

[0118] The printer 1 may also be provided with a drying mechanism and a heating mechanism (neither of which is shown in the figure). The drying mechanism and the heating mechanism are mechanisms for effectively drying the processing liquid and ink adhering to the fabric 2. The drying mechanism and the heating mechanism may be provided at any location where they can dry and heat the fabric 2, and their location is not particularly limited. In order to effectively dry the ink and processing liquid adhering to the fabric 2, for example, Figure 9 In the embodiment, the drying mechanism and the heating mechanism can be provided at positions facing the inkjet head 3 .

[0119] Examples of drying and heating mechanisms include a printing heater that heats the fabric 2 by contacting it with a heat source, a mechanism that irradiates infrared light or microwaves, electromagnetic waves with a maximum wavelength of approximately 2,450 MHz, or a drying mechanism that blows hot air. The fabric 2 is heated before or while droplets ejected from the nozzles of the inkjet head 3 adhere to the fabric 2. The control unit controls various heating conditions, such as heating timing, heating temperature, and heating time.

[0120] Alternatively, the drying mechanism and the heating mechanism may be provided downstream in the conveyance direction of the fabric 2. In this case, after the ink and processing liquid ejected from the nozzles adhere to the fabric 2 to form an image, the fabric 2 is heated. This improves the drying properties of the ink and processing liquid adhered to the fabric 2.

[0121] Example

[0122] Hereinafter, the present invention will be described in more detail using Examples and Comparative Examples. However, the present invention is not limited to the following Examples.

[0123] exist Figures 1 to 3 In the table, there are described Tables 1 to 3 showing the structures of the compositions of Examples and Comparative Examples.

[0124] 1. Preparation of each composition

[0125] According to the compositions listed in Tables 1 to 3, the components were added to a mixing tank, mixed and stirred, and then filtered through a membrane filter to obtain the respective treatment liquid compositions, colored ink compositions, and clear ink compositions. The numerical values ​​of the components listed in the tables represent percentages by mass based on the total mass of the respective compositions, unless otherwise specified.

[0126] The abbreviations used and details of the product ingredients are as follows.

[0127] 1.1. Treatment fluid composition

[0128] organic acids

[0129] ·DL-lactic acid

[0130] Succinic acid

[0131] Citric acid

[0132] Polyacrylic acid

[0133] organic acid salts

[0134] Calcium lactate

[0135] Polyvalent metal salts

[0136] Magnesium sulfate

[0137] organic solvents

[0138] ·glycerin

[0139] Propylene glycol

[0140] surfactants

[0141] OLFINE E1010 (trade name, acetylene glycol-based surfactant, manufactured by Nissin Chemical Industry Co., Ltd.)

[0142] antimicrobial agents

[0143] Proxel XL2 (trade name, manufactured by Lonza Japan)

[0144] water

[0145] Ion exchange water

[0146] 1.2. Colored ink

[0147] Anionic self-dispersing resin emulsion

[0148] Polycarbonate-based polyurethane (trade name "UW1527F", manufactured by UBE)

[0149] Nonionic self-dispersing resin emulsion

[0150] Non-reactive urethane resin (trade name "SUPER FLEX 500M", Daiichi Industrial Pharmaceutical)

[0151] Anionic self-dispersible pigments

[0152] 500 g of carbon black raw material powder (primary particle size = 18 nm, BET specific surface area = 180 m 2 / g, DBP absorption = 186 mL / 100 g) was added to 3750 g of ion-exchanged water and heated to 45°C while stirring in a dissolver. Then, while pulverizing in a sand mill using zirconia beads with a diameter of 0.8 mm, 30,000 g of an aqueous solution of sodium hypochlorite (effective chlorine concentration = 12%) was added dropwise over 3.5 hours at 45°C. The sand mill was then continued to pulverize for 30 minutes to obtain a reaction solution containing self-dispersible carbon black. The reaction solution was filtered through a 400-mesh metal mesh to separate the zirconia beads and unreacted carbon black from the reaction solution. A 5% aqueous potassium hydroxide solution was added to the separated reaction solution to adjust the pH to 7.5. Desalination and purification were performed using an ultrafiltration membrane until the liquid conductivity reached 1.5 mS / cm. Further desalination and purification were performed using an electrodialysis unit until the liquid conductivity reached 1.0 mS / cm. The solution was concentrated to a self-dispersible carbon black concentration of 17% by mass. The concentrate was centrifuged to remove coarse particles and filtered through a 0.6 μm filter. Ion-exchanged water was added to the resulting filtrate to dilute it to a concentration of 15% by mass of the self-dispersible carbon black, thereby dispersing the resultant to obtain a self-dispersible pigment dispersion.

[0153] Anionic resin dispersed pigments

[0154] To 15 parts by mass of carbon black, 10 parts by mass of an ammonium salt of a styrene-acrylic acid copolymer (weight-average molecular weight 10,000) as a dispersant and 55 parts by mass of ion-exchanged water were added and thoroughly mixed. The mixture was then dispersed in a sand mill (manufactured by Yaskawa Seisakusho Co., Ltd.) along with glass beads (1.7 mm diameter, 1.5 times the amount of the mixture) for 2 hours. After dispersion, the glass beads were removed to obtain a resin-dispersed pigment dispersion.

[0155] organic solvents

[0156] ·glycerin

[0157] Triethylene glycol monobutyl ether

[0158] surfactants

[0159] OLFINE E1010 (trade name, acetylene glycol-based surfactant, manufactured by Nissin Chemical Industry Co., Ltd.)

[0160] pH adjusters

[0161] Triethanolamine

[0162] antimicrobial agents

[0163] Proxel XL2 (trade name, manufactured by Lonza Japan)

[0164] water

[0165] Ion exchange water

[0166] 1.3. Transparent ink

[0167] Anionic self-dispersing resin emulsion

[0168] Polycarbonate-based polyurethane (trade name "UW1527F", manufactured by UBE)

[0169] Nonionic self-dispersing resin emulsion

[0170] Non-reactive urethane resin (trade name "SUPER FLEX 500M", Daiichi Industrial Pharmaceutical)

[0171] organic solvents

[0172] ·glycerin

[0173] Triethylene glycol monobutyl ether

[0174] surfactants

[0175] OLFINE E1010 (trade name, acetylene glycol-based surfactant, manufactured by Nissin Chemical Industry Co., Ltd.)

[0176] pH adjusters

[0177] Triethanolamine

[0178] antimicrobial agents

[0179] Proxel XL2 (trade name, manufactured by Lonza Japan)

[0180] water

[0181] Ion exchange water

[0182] 2. Printing and dyeing recording method

[0183] Using a modified PX-H8000 (manufactured by Seiko Epson Corporation), printing was performed on a 100% cotton, white, wide recording medium under the conditions listed in Tables 4 through 8 below. Multiple main scans (2, 4, 8, 12, or 16) were performed on the same scan area to form a solid pattern image on the A4-sized cloth recording medium. The printed materials for each example and comparative example were then produced by drying them in an oven at 160°C for 3 minutes. Note that a "solid pattern image" refers to an image in which dots are recorded on all pixels in the minimum recording unit area defined by the recording resolution (duty 100%).

[0184] The inkjet head used was a printhead assembly with 600 nozzles and a nozzle spacing of 600 dpi across the width of the recording medium. Furthermore, in each example, the nozzle group ejecting the treatment liquid and the nozzle group ejecting the colored ink composition had portions located in the same position in the sub-scanning direction, and the nozzle group ejecting the non-colored ink composition was located downstream of the nozzle group ejecting the colored ink composition in the sub-scanning direction. Thus, the treatment liquid and the colored ink composition were deposited on the same scanned area of ​​the fabric during the same main scan, while the non-colored ink composition was deposited on the same scanned area of ​​the fabric during a different main scan.

[0185] Figures 4 to 8 Tables 4 to 8 showing the structures of the compositions and recording methods of the examples and the evaluation results thereof are described in the table.

[0186] In Tables 4 to 8, the "simultaneous" discharge method indicates a simultaneous deposition process in which the treatment liquid composition and the colored ink composition are deposited on the same operating area of ​​the fabric using the same main scan. Furthermore, "post-dispensing" indicates that, after the simultaneous deposition process, a clear ink deposition process is performed in which a clear ink composition is deposited on the fabric side using a main scan different from the simultaneous deposition process.

[0187] In Tables 4 to 8, the recording areas indicate the following relationships: It should be noted that, unless otherwise specified in the table, the area is Type 1.

[0188] Recording area relationships

[0189] Type 1: The treatment liquid adhesion process and the clear ink adhesion process are performed on the same area, and the colored ink adhesion process is performed on a narrower area (the area that enters the treatment liquid and clear ink areas).

[0190] Type 2: The treatment liquid adhesion step, the color ink adhesion step, and the clear ink adhesion step are performed on the same areas.

[0191] Type 3: The colored ink adhesion process is performed on an area narrower than the area where the treatment liquid adhesion process is performed, and the clear ink adhesion process is performed on an area narrower than the area where the colored ink adhesion process is performed.

[0192] It should be noted that, although not recorded in the table, in Example 20, when the relationship of the recording areas is changed to Type 3, although the frictional robustness is worse than that of Example 20, an effect equivalent to the frictional robustness evaluation B described later can be obtained.

[0193] In Comparative Example 8 of Table 8, a 100% cotton white wide cloth was rolled using a roller at 27.6 g / m2 The treatment liquid 3 was evenly applied in an amount of 1000 ml. After application, the fabric was heated in an oven at 160°C for 2 minutes. The fabric was then transferred to the apparatus described above and the colored ink composition adhesion step and the clear ink composition adhesion step were performed in that order.

[0194] 3. Evaluation Method

[0195] 3.1. Anti-printing

[0196] The printed material obtained above was measured for the black OD value on the back side of the print using a fluorescence spectrophotometer ("FD-7", manufactured by Konica Minolta Inc.), and the degree of show-through was evaluated according to the following criteria. If the evaluation result is B or higher, show-through is considered to be suppressed, and contamination of the transport system can be prevented.

[0197] Evaluation Benchmarks

[0198] A: Maximum OD value is less than 0.46

[0199] B: Maximum OD value is 0.46 or more and less than 0.6

[0200] C: Maximum OD value is 0.6 or above

[0201] Color rendering

[0202] The black OD value of the printed surface of the obtained printed product was measured using a fluorescence spectrophotometer ("FD-7", manufactured by Konica Minolta Inc.), and the color rendering properties were evaluated according to the following criteria. When the evaluation result was B or higher, it can be said that good color rendering properties were obtained.

[0203] Evaluation Benchmarks

[0204] AAA: Maximum OD value is above 1.50

[0205] AA: Maximum OD value is 1.47 or more and less than 1.50

[0206] A: The maximum OD value is greater than 1.44 and less than 1.46

[0207] B: Maximum OD value is greater than 1.40 and less than 1.44

[0208] C: Maximum OD value is less than 1.40

[0209] 3.3. Frictional firmness

[0210] The printed textile obtained above was tested for friction fastness using the test method based on ISO105-X12, and the wet friction fastness was evaluated according to the following criteria: When the evaluation result was B or higher, it can be said that good wet friction fastness was obtained.

[0211] Evaluation Benchmarks

[0212] A: Friction firmness is above level 3

[0213] B: Friction firmness is above level 2-3 and less than level 3

[0214] C: Friction firmness is above level 2 and less than level 2-3

[0215] D: Friction firmness is less than level 2

[0216] 4. Evaluation results

[0217] As shown in Tables 4 to 8, an inkjet recording method includes: a treatment liquid attaching step of attaching a treatment liquid composition containing an organic acid and water to an arbitrary portion on a fabric by an inkjet method; a colored ink attaching step of attaching droplets of a colored ink composition containing a pigment, anionic first resin particles, and water to the arbitrary portion by an inkjet method; and a transparent ink attaching step of attaching droplets of a transparent ink composition containing anionic second resin particles and water to the arbitrary portion by an inkjet method. In the treatment liquid attaching step, the amount of acidic groups derived from the organic acid attached to the arbitrary portion is 4.5 mmol / m 2 As described above, the shortest time difference |α| from the time when one of the above-mentioned colored ink composition and the above-mentioned treatment liquid composition adheres to the above-mentioned arbitrary part to the time when the other one adheres to the above-mentioned arbitrary part is within 5 minutes. When recording is performed by the above-mentioned inkjet recording method, the anti-printing and friction fastness are excellent.

Claims

1. An inkjet recording method, characterized in that The inkjet recording method comprises: a treatment liquid attachment step of attaching a treatment liquid composition containing an organic acid and water to an arbitrary position on the fabric by an inkjet method; a colored ink attaching step of attaching droplets of a colored ink composition containing a pigment, anionic first resin particles, and water to the arbitrary portion by an inkjet method; and The clear ink attaching step is to attach droplets of a clear ink composition containing anionic second resin particles and water to the arbitrary portion by an inkjet method. In the treatment liquid attachment step, the amount of the acidic groups derived from the organic acid attached to the arbitrary portion is 4.5 mmol / m 2 above, The shortest time difference |α| from when one of the colored ink composition and the treatment liquid composition adheres to the arbitrary portion to when the other adheres to the arbitrary portion is within 5 minutes.

2. The inkjet recording method according to claim 1, wherein The time difference |α| is within 10 msec.

3. The inkjet recording method according to claim 1, wherein The shortest time difference |β| from when one of the colored ink composition and the clear ink composition adheres to the arbitrary portion to when the other adheres to the arbitrary portion is 1.0 sec or more and 5.0 sec or less.

4. The inkjet recording method according to claim 1, wherein The molecular weight of the organic acid is 5000 or less.

5. The inkjet recording method according to claim 1, wherein The pigment is a self-dispersing pigment.

6. The inkjet recording method according to claim 1, wherein The adhesion amount X of the treatment liquid per unit area, the adhesion amount Y of the colored ink composition per unit area, and the adhesion amount Z of the clear ink composition per unit area satisfy the relationship of the following formula (1): (Y+Z) / X≥1.1…(1).

7. The inkjet recording method according to claim 1, wherein In the recording area to which the colored ink is attached, the amount Y of the colored ink composition attached per unit area is 10 g / m 2 above.

8. The inkjet recording method according to claim 1, wherein The area A of the first region to which the treatment liquid adheres, the area B of the second region to which the colored ink composition adheres, and the area C of the third region to which the clear ink composition adheres satisfy the relationship of the following formula (2): C≥A≥B…(2).

Images