Image formation methods

Abstract

To provide an image formation method which is capable of forming an image having good friction fastness without impairing feeling of a fabric.SOLUTION: An image formation method includes the steps of: preparing a fabric to which a coagulant adheres; applying aqueous ink containing a pigment, a first resin, and water onto the fabric to which the coagulant adheres; and applying a coat liquid containing a second resin and water onto the applied aqueous ink. The second resin is aggregated by the coagulant, the content the second resin in the coat liquid is smaller than the content of the first resin in the aqueous ink, and an amount of the coat liquid adhering onto the fabric is larger than an amount of the aqueous ink adhering onto the fabric.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an image forming method. [Background technology]

[0002] Inkjet printing, which forms an image on fabric using an inkjet system, is a technique that simplifies the process and is easier to handle small lots than screen printing and the like, and can provide printed products at low cost.

[0003] Dye inks are the most commonly used inks for inkjet textile printing. With dye inks, the dye adheres to the fibers of the fabric, making it easy to obtain highly fixed images. However, they require heating for dyeing and a process to wash away any unadsorbed dye. Therefore, the use of pigment inks, which eliminate these processes, is being considered.

[0004] Pigment inks typically contain pigment, resin particles (binder resin), and water. Images formed with such pigment inks exhibit high color development because the pigment particles tend to be exposed near the surface of the fabric, but tend to have low friction fastness. In particular, for textile printing applications, friction fastness that can suppress color fading and color transfer due to friction is required.

[0005] In response to this, studies have been conducted to improve the abrasion resistance by coating the surface of a pigment ink layer applied to a fabric with a transparent coating liquid. For example, Patent Document 1 discloses a textile printing method in which a pigment ink containing a pigment and a first resin is applied to a fabric, and then a coating liquid containing a second resin and water is applied onto the applied pigment ink. This document states that by reducing the content of the first resin in the ink, inkjet ejection stability can be improved, while by increasing the content of the second resin in the coating liquid relative to the content of the first resin in the ink, fixation can be ensured.

[0006] Patent Document 2 discloses an inkjet recording method in which a colored ink is applied to a recording medium and then a transparent treatment ink is applied. This document states that by making the viscosity of the transparent treatment ink lower than that of the colored inks, ejection stability by inkjet printing can be improved, and by increasing the number of droplets of the transparent treatment ink ejected relative to the number of droplets of the colored inks, coverage can be ensured.

[0007] Patent Document 3 discloses an inkjet printing method in which an ink composition containing a pigment and resin particles is applied to a fabric, and then a coating composition containing resin particles and water is applied onto the applied ink composition. It also discloses that the content of resin particles in the coating composition is less than the content of resin particles in the ink composition, and that the coating amount of the coating composition is greater than the coating amount of the ink composition. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-71957 [Patent Document 2] Japanese Patent Application Laid-Open No. 2014-104621 [Patent Document 3] Japanese Patent Application Publication No. 2019-99790 Summary of the Invention [Problem to be solved by the invention]

[0009] In textile printing using such pigment inks, from the viewpoint of improving color development and minimizing damage to the texture of the fabric, it is desirable to thicken the ink or coating liquid near the surface of the fabric so that the components contained in the ink or coating liquid do not penetrate deep into the fabric. For this reason, a process (pretreatment) may be performed in which a flocculant is applied to the fabric in advance to thicken the pigment contained in the ink or the resin particles contained in the coating liquid on the fabric.

[0010] However, when a coating liquid is applied after applying an ink onto a fabric with such a flocculant attached, the resin particles contained in the coating liquid tend to aggregate excessively, making it difficult to wet and spread. As a result, the surface of the ink layer cannot be sufficiently covered with the coating liquid, and sufficient friction resistance cannot be obtained. If the content of resin particles in the coating liquid is increased in order to obtain sufficient friction resistance, the fabric may become hard and the texture may be impaired.

[0011] The present invention has been made in view of the above problems, and has as its object to provide an image forming method capable of forming an image with good abrasion fastness without impairing the texture of the fabric. [Means for solving the problem]

[0012] The above problem can be solved by the following configuration.

[0013] The image forming method of the present invention includes the steps of preparing a fabric having an aggregating agent attached thereto, applying an aqueous ink containing a pigment, a first resin, and water onto the fabric having the aggregating agent attached thereto, and applying a coating liquid containing a second resin and water onto the applied aqueous ink, wherein the second resin is aggregable by the aggregating agent, the content of the second resin in the coating liquid is less than the content of the first resin in the aqueous ink, and the amount of the coating liquid adhering to the fabric is greater than the amount of the aqueous ink adhering to the fabric. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide an image forming method capable of forming an image having good resistance to friction without impairing the texture of the fabric. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a schematic diagram showing the configuration of an image forming apparatus used in the image forming method of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] The inventors have discovered that the above problem can be solved by making the amount of resin (second resin) contained in the coating liquid less than the amount of resin (first resin) contained in the ink, and by making the amount of coating liquid adhering to the fabric greater than the amount of ink adhering to the fabric.

[0017] That is, by reducing the amount of the second resin contained in the coating liquid, the reaction rate between the coagulant present on the fabric or ink layer and the second resin can be reduced. This prevents the coating liquid applied to the ink layer from excessively thickening, making it easier to wet and spread. Furthermore, by applying a large amount of coating liquid with a low content of the second resin (increasing the amount of applied liquid), the surface of the ink layer can be sufficiently covered with the coating liquid, resulting in a thin, uniform coating of the second resin on the surface of the ink layer. This allows for sufficient improvement in abrasion resistance without impairing the texture of the fabric. Note that the amounts of the first resin and second resin contained in these liquids, as well as the amount of applied liquid, are all amounts by mass.

[0018] On the other hand, if the amount of the second resin contained in the coating liquid is reduced, the reaction rate between the second resin and the aggregating agent will decrease, and there is a risk that the coating liquid will penetrate into the interior of the fabric. If the coating liquid penetrates into the interior of the fabric, the second resin will tend to bond the fibers inside the fabric, making the fabric more likely to become hard and damaging the texture. To address this issue, the penetration of the coating liquid into the interior of the fabric can be suppressed by ensuring that the amount of the ink-derived first resin attached to the fabric is at least a certain amount, or by specifying the type of the first resin (particularly its Tg). The image forming method of the present invention will be described in detail below.

[0019] 1. Image forming method The image forming method of the present invention includes the steps of: 1) preparing a fabric having a flocculant attached thereto; 2) applying a water-based ink (hereinafter simply referred to as "ink") containing a pigment, a first resin, and water onto the fabric having the flocculant attached thereto; and 3) applying a coating liquid containing a second resin and water onto the applied ink.

[0020] 1) A process of preparing a fabric to which a flocculant is attached The fabric having the flocculant attached thereto can be obtained by any method. For example, the fabric having the flocculant attached thereto can be obtained by applying a pretreatment liquid containing the flocculant to the fabric.

[0021] <Fabric> The type of fiber contained in the fabric is not particularly limited, and may be natural fiber or chemical fiber. Examples of natural fibers include cotton, linen, wool, silk, etc. Examples of chemical fibers include synthetic cellulose, rayon, vinylon, nylon, acrylic, polyurethane, polyester, acetate, etc. Among these, the fabric preferably contains natural fiber or synthetic cellulose fiber, and more preferably cotton or synthetic cellulose fiber.

[0022] The fabric may contain two or more types of fibers. For example, the fabric may contain natural fibers or synthetic cellulose fibers and other fibers (e.g., polyester fibers). In this case, the ratio of natural fibers or synthetic cellulose fibers to the fibers constituting the fabric may be preferably 35% by mass or more, more preferably 50% by mass or more.

[0023] The fabric may be made from these fibers in any form such as woven fabric, nonwoven fabric, knitted fabric, etc.

[0024] <Pretreatment> The pretreatment liquid is applied to at least a portion of the surface of the fabric. The pretreatment liquid may be applied to the entire surface of the fabric, or may be applied selectively to only the area to be dyed.

[0025] The pretreatment liquid contains an aggregating agent. The aggregating agent aggregates the pigment in the ink, making it easier to thicken the ink on the fabric, and also aggregates or precipitates the second resin in the coating liquid, thickening the coating liquid on the ink layer. This makes it difficult for the ink or coating liquid to penetrate into the fabric, allowing it to be retained near the surface of the fabric. The mechanism for aggregating or precipitating the pigment or second resin is not particularly limited, and may be an electrical reaction (reaction between anionic groups and cationic groups) or an action due to a change in pH.

[0026] The flocculant includes one or more selected from the group consisting of polyvalent metal salts, organic acids, and cationic polymers.

[0027] The polyvalent metal compound is not particularly limited, but examples thereof include titanium compounds, chromium compounds, copper compounds, cobalt compounds, strontium compounds, barium compounds, iron compounds, aluminum compounds, calcium compounds, and magnesium compounds, and preferably aluminum compounds, calcium compounds, magnesium compounds, or salts thereof.

[0028] Specific examples of polyvalent metal compounds include calcium carbonate such as heavy calcium carbonate and light calcium carbonate, chalk, kaolin, calcined clay, talc, calcium nitrate, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate, aluminum silicate, calcium silicate, magnesium silicate, synthetic silica, aluminum hydroxide, alumina, sericite, white carbon, saponite, calcium montmorillonite, sodium montmorillonite, and bentonite. For example, from the viewpoint of good solubility in water, calcium nitrate or calcium chloride is preferred, and calcium nitrate is more preferred.

[0029] Examples of cationic polymers include cationic urethane resins, cationic olefin resins, allylamine resins, polyethyleneimine, etc. These polymers may have, as cationic functional groups, primary, secondary, or tertiary amino groups, pyridine groups, imidazole groups, benzimidazole groups, triazole groups, benzotriazole groups, pyrazole groups, benzopyrazole groups, etc.

[0030] The cationic urethane resin may be a commercially available product, and examples thereof include Hydran CP-7010, CP-7020, CP-7030, CP-7040, CP-7050, CP-7060, and CP-7610 (trade names, manufactured by Dainippon Ink and Chemicals, Inc.); Superflex 600, 610, 620, 630, 640, and 650 (trade names, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.); and Urethane Emulsion WBR-2120C and WBR-2122C (trade names, manufactured by Taisei Fine Chemical Co., Ltd.).

[0031] The cationic olefin resin has an olefin such as ethylene or propylene in its structural skeleton, and known cationic olefin resins can be used. Commercially available cationic olefin resins can be used, such as Arrowbase CB-1200 and CD-1200 (trade names, manufactured by Unitika Ltd.).

[0032] Examples of allylamine-based resins include polyallylamine hydrochloride, polyallylamine amidosulfate, allylamine hydrochloride-diallylamine hydrochloride copolymer, allylamine acetate-diallylamine acetate copolymer, allylamine acetate-diallylamine acetate copolymer, allylamine hydrochloride-dimethylallylamine hydrochloride copolymer, allylamine-dimethylallylamine copolymer, polydiallylamine hydrochloride, polymethyldiallylamine acetate, etc. Commercially available allylamine-based resins include, for example, PAA-HCL-01, PAA-HCL-03, and PAA-HCL-05 (trade names, manufactured by Nittobo Medical Co., Ltd.).

[0033] Examples of commercially available polyethyleneimine include Epomin (registered trademark) P-1000 manufactured by Nippon Shokubai Co., Ltd.

[0034] The organic acid may be a carboxylic acid having 1 to 6 carbon atoms. Examples of the organic acid include acetic acid, propionic acid, pantothenic acid, ascorbic acid, citric acid, malic acid, lactic acid, tartaric acid, succinic acid, gluconic acid, and the like.

[0035] The pretreatment liquid may contain water, a water-soluble organic solvent, a surfactant, a pH adjuster, a preservative, a chelating agent, a resin, etc., depending on the pretreatment method.

[0036] The method for applying the pretreatment liquid is not particularly limited, and may be any of a spray method, a mangle method (a pad method), a coating method, and an inkjet method. For example, when the pretreatment liquid application step and the ink application step are performed online, the inkjet method is preferred.

[0037] The amount of the coagulant attached to the fabric is, for example, 5 to 120 g / cm 2 is preferably 20 to 60 g / cm 2 When the amount of the aggregating agent applied is within the above range, the aggregating agent tends to be present relatively uniformly on the fabric, making it difficult for the ink to penetrate into the interior of the fabric.

[0038] Next, the pretreatment liquid applied to the fabric is dried. The drying method is not particularly limited, and may be hot air, a hot plate, or heating with a heat roller. Heat drying is preferred from the viewpoint of sufficiently removing the solvent component in a short time. The drying temperature may be 100 to 130°C.

[0039] 2) Ink application process Next, ink is applied onto the fabric to which the coagulant has been attached. The method for applying the ink is not particularly limited, but is preferably an inkjet method.

[0040] <Ink> The ink includes a pigment, a first resin, and water.

[0041] (pigment) The pigment is not particularly limited, but may be, for example, an organic pigment or an inorganic pigment having the following numbers listed in the Color Index:

[0042] Examples of orange or yellow pigments include CI Pigment Orange 31, CI Pigment Orange 43, CI Pigment Yellow 12, CI Pigment Yellow 13, CI Pigment Yellow 14, CI Pigment Yellow 15, CI Pigment Yellow 17, CI Pigment Yellow 74, CI Pigment Yellow 83, CI Pigment Yellow 93, CI Pigment Yellow 94, CI Pigment Yellow 128, CI Pigment Yellow 138, CI Pigment Yellow 151, CI Pigment Yellow 154, CI Pigment Yellow 155, CI Pigment Yellow 180, CI Pigment Yellow 185, and CI Pigment Yellow 213.

[0043] Examples of red or magenta pigments include Pigment Red 3, 5, 19, 22, 31, 38, 43, 48:1, 48:2, 48:3, 48:4, 48:5, 49:1, 53:1, 57:1, 57:2, 58:4, 63:1, 81, 81:1, 81:2, 81:3, 81:4, 88, 104, 108, 112, 122, 123, 144, 146, 149, 166, 168, 169, 170, 177, 178, 179, 184, 185, 208, 216, 226, 257, Pigment Violet 3, 19, 23, 29, 30, 37, 50, 88, and Pigment Orange 13, 16, 20, and 36.

[0044] Examples of blue or cyan pigments include Pigment Blue 1, 15, 15:1, 15:2, 15:3, 15:4, 15:6, 16, 17-1, 22, 27, 28, 29, 36, 60.

[0045] Examples of green pigments include Pigment Green 7, 26, 36, and 50. Examples of yellow pigments include Pigment Yellow 1, 3, 12, 13, 14, 17, 34, 35, 37, 55, 74, 81, 83, 93, 94, 95, 97, 108, 109, 110, 137, 138, 139, 153, 154, 155, 157, 166, 167, 168, 180, 185, and 193.

[0046] Examples of black pigments include Pigment Black 7, 28, and 26.

[0047] From the viewpoint of improving dispersibility in the ink, the pigment is preferably further dispersed with a pigment dispersant, which will be described later.

[0048] The pigment may also be a self-dispersing pigment. A self-dispersing pigment is a pigment particle whose surface is modified with a group having a hydrophilic group, and has pigment particles and hydrophilic groups bonded to the surface. Examples of the hydrophilic group include a carboxyl group, a sulfonic acid group, and a phosphorus-containing group. Examples of the phosphorus-containing group include a phosphate group, a phosphonic acid group, a phosphinic acid group, a phosphite group, and a phosphate group.

[0049] Examples of commercially available self-dispersing pigments include Cabot Corporation's Cab-0-Jet (registered trademark) 200K, 250C, 260M, and 270V (sulfonic acid group-containing self-dispersing pigments), Cab-0-Jet (registered trademark) 300K (carboxylic acid group-containing self-dispersing pigments), and Cab-0-Jet (registered trademark) 400K, 450C, 465M, 470V, and 480V (phosphate group-containing self-dispersing pigments).

[0050] From the viewpoint of enabling the formation of high-density images, the content of the pigment is, for example, preferably 0.3 to 10% by mass, and more preferably 0.5 to 3% by mass, relative to the ink.

[0051] (First resin) The first resin is a binder resin. The first resin is preferably a water-dispersible resin (resin particles). The water-dispersible resin may be a self-dispersible resin particle (self-dispersible resin particle) into which a hydrophilic component necessary for stable dispersion in water is introduced, or may be a resin particle that becomes water-dispersible by the use of an external emulsifier.

[0052] From the viewpoint of not impairing the texture of the fabric, the water-dispersible resin is preferably, for example, a urethane-based, styrene-acrylic-based, polycarbonate-based, (meth)acrylic-based, or vinyl chloride-vinyl acetate-based resin, and from the viewpoint of flexibility, a urethane-based or (meth)acrylic-based resin is more preferred.

[0053] The urethane resin may be any of polyether urethane resin, polyester urethane resin, and polycarbonate urethane resin. Commercially available urethane resins include ETERNACOLL UW-1501F and UW-5002 (trade names manufactured by Ube Industries, Ltd.), TAKELAC WS-5000, W-6061, W-6110, WS-5984, and WS-5100 (trade names manufactured by Mitsui Chemicals, Inc.), PERMARINE UA-150, UA-200, and U-COAT UX-390 (trade names manufactured by Sanyo Chemical Industries, Ltd.), and HYDRAN WLS-210 (trade name manufactured by DIC Corporation).

[0054] The (meth)acrylic resin is a polymer containing a structural unit derived from alkyl (meth)acrylate, and preferably a polymer containing alkyl acrylate as a main component. This is because alkyl acrylate polymers have a lower glass transition temperature (Tg) and are more flexible than alkyl methacrylate polymers, and therefore are less likely to impair the texture of fabrics during inkjet printing. Note that (meth)acrylic is a concept that includes both methacrylic and acrylic.

[0055] The number of carbon atoms in the alkyl group of the alkyl acrylate is, for example, 4 to 8. Examples of such alkyl acrylates include butyl acrylate, pentyl acrylate, hexyl acrylate, heptyl acrylate, and 2-ethylhexyl acrylate, with butyl acrylate being preferred.

[0056] The polymer containing alkyl acrylate as a main component may further contain structural units derived from other monomers than alkyl acrylate. Examples of the other monomers include alkyl methacrylate, (meth)acrylamide, functional group-containing alkyl (meth)acrylate (e.g., hydroxyalkyl (meth)acrylate), aromatic ring-containing (meth)acrylate, styrene, etc., preferably alkyl methacrylate, more preferably methyl methacrylate.

[0057] The content of structural units derived from alkyl acrylate is preferably 60% by mass or more, more preferably 70% by mass or more, and even more preferably 80% by mass or more, based on all structural units of the polymer.

[0058] These water-dispersible resins may further have an anionic group such as a carboxyl group, a sulfo group, or a hydroxy group, from the viewpoint of improving the storage stability of the ink or improving the reactivity with the flocculant contained in the pretreatment liquid.

[0059] The average particle size of the water-dispersible resin is preferably 30 to 200 nm, more preferably 50 to 120 nm, from the viewpoint of improving ejection properties, for example, by inkjet. The average particle size is the average value of primary particle sizes. The average particle size of the resin particles in the resin dispersion can be measured as the dispersed particle size (Z average) using, for example, a Zataizer Nano S90 manufactured by Melvern.

[0060] The glass transition temperature (Tg) of the first resin is preferably low from the viewpoint of preventing deterioration of the texture of the fabric, and is, for example, −25° C. or lower, preferably −25 to −50° C. The Tg of the resin can be measured by differential scanning calorimetry in accordance with JIS K7121 at a temperature rise rate of 10° C. / min.

[0061] Furthermore, in order to avoid impairing the texture of the fabric even when the amount of the first resin applied is increased, it is preferable that the first resin be a relatively flexible resin. Therefore, it is preferable that the Tg of the first resin is equal to or lower than that of the second resin. For example, it is preferable that the first resin contains a (meth)acrylic resin with a Tg of −35° C. or lower.

[0062] The content of the first resin in the ink is preferably greater than the content of the second resin in the coating liquid. A relatively high content of the first resin in the ink not only facilitates sufficient fixation of the ink to the fabric, but also makes it more difficult for the coating liquid to penetrate into the interior of the fabric.

[0063] Specifically, the content of the first resin in the ink is preferably 10 to 35% by mass relative to the ink. If the content of the first resin is 10% by mass or more, not only can the fixation of the ink to the fabric be sufficiently improved, but also the coating liquid can be made less likely to penetrate into the interior of the fabric. From the same perspective, the content of the first resin is more preferably 15 to 35% by mass relative to the ink, and even more preferably 20 to 28% by mass.

[0064] (Other ingredients) The ink may further contain other components such as a water-soluble organic solvent, a pigment dispersant, a surfactant, an antiseptic, an antifungal agent, and a pH adjuster, as required.

[0065] Examples of the water-soluble organic solvent include alcohols (e.g., methanol, ethanol, propanol, pentanol, hexanol, cyclohexanol, benzyl alcohol), polyhydric alcohols (e.g., ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, glycerin, compounds represented by formula (1)), polyhydric alcohol ethers (e.g., ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol monophenyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether), ethanolamine, N-ethyldiethanolamine, morpholine, N-ethylmorpholine, ethylenediamine, diethylenediamine, triethylenetetramine), amides (e.g., formamide, N,N-dimethylformamide, N,N-dimethylacetamide), heterocycles (e.g., 2-pyrrolidone, N-methyl-2-pyrrolidone, N-cyclohexyl-2-pyrrolidone, 2-oxazolidone, 1,3-dimethyl-2-imidazolidine), sulfoxides (e.g., dimethyl sulfoxide), sulfones (e.g., sulfolane). [ka] (In formula (1), R 11 represents an ethylene glycol group or a propylene glycol group, x, y, and z are all positive integers, and x+y+z=3 to 30.

[0066] In particular, from the viewpoint of facilitating the ink penetration into the interior of the fabric and enhancing ejection properties from the inkjet recording head, it is preferable that the ink does not easily increase in viscosity upon drying. Therefore, it is preferable that the ink contains a high-boiling-point solvent having a boiling point of 200°C or higher.

[0067] High boiling point solvents having a boiling point of 200°C or higher include polyols and polyalkylene oxides having a boiling point of 200°C or higher, preferably polyols having a boiling point of 200°C or higher, more preferably glycerin.

[0068] The content of the water-soluble organic solvent is not particularly limited, but from the viewpoint of, for example, ejection performance from an inkjet recording head, it is preferably 10 to 40% by mass, and more preferably 20 to 35% by mass, of the ink. The total amount of water and the water-soluble organic solvent is not particularly limited, but it is preferably, for example, 50 to 90% by mass, and more preferably 60 to 85% by mass, of the ink.

[0069] The pigment dispersant is present in the ink so as to surround the surface of the pigment particle or is adsorbed to the surface of the pigment particle to form a pigment dispersion and disperse the pigment well. The pigment dispersant is preferably a polymer dispersant, more preferably an anionic polymer dispersant. The anionic polymer dispersant is a polymer dispersant having a hydrophilic group such as a carboxylic acid group, a phosphorus-containing group, or a sulfonic acid group, and is preferably a polymer dispersant having a carboxylic acid group.

[0070] The polymer dispersant having a carboxylic acid group may be a polycarboxylic acid or a salt thereof. Examples of polycarboxylic acids include (co)polymers of monomers selected from acrylic acid or its derivatives, maleic acid or its derivatives, itaconic acid or its derivatives, and fumaric acid or its derivatives, and salts thereof. Examples of other monomers that may form the copolymer include styrene and vinylnaphthalene.

[0071] The anionic group equivalent of the anionic polymer dispersant can be, for example, 1.1 to 3.8 meq / g, from the viewpoint of sufficiently dispersing pigment particles. When the anionic group equivalent is within the above range, high pigment dispersibility is easily obtained without increasing the molecular weight of the anionic polymer dispersant. The anionic group equivalent can be determined from the acid value; the acid value can be measured in accordance with JIS K0070.

[0072] The weight average molecular weight (Mw) of the polymer dispersant can be, for example, 5,000 to 30,000. If the Mw of the polymer dispersant is 5,000 or more, the pigment particles can be dispersed sufficiently, and if it is 30,000 or less, the ink does not become too viscous. The Mw of the polymer dispersant can be measured by the same method as above.

[0073] The content of the polymer dispersant is such that the pigment particles are sufficiently dispersed, and is, for example, 20 to 100% by mass, preferably 25 to 60% by mass, based on the pigment.

[0074] The surfactant can reduce the surface tension of the ink and increase the wettability of the ink to the fabric. The type of surfactant is not particularly limited, but can be, for example, an acetylene glycol surfactant, a silicone surfactant, or a fluorine surfactant.

[0075] Examples of the preservative or antifungal agent include aromatic halogen compounds (eg, Preventol CMK), methylene dithiocyanate, halogen-containing nitrogen-sulfur compounds, 1,2-benzisothiazolin-3-one (eg, PROXEL GXL), and the like.

[0076] Examples of pH adjusters include citric acid, sodium citrate, hydrochloric acid, and sodium hydroxide.

[0077] The viscosity of the ink at 25°C is not particularly limited as long as it provides good ejection properties using an inkjet system, but is preferably 3 to 20 mPa·s, and more preferably 4 to 12 mPa·s. The viscosity of the ink can be measured at 25°C using an E-type viscometer.

[0078] The surface tension of the ink at 25°C is not particularly limited, but from the viewpoint of ensuring sufficient wetting and spreading on the fabric, it is preferably greater than the surface tension of the coating liquid at 25°C. Specifically, the surface tension of the ink at 25°C is preferably 35 to 45 mN / m. The surface tension of the ink can be measured at 25°C by the Wilhelmy method using a surface tensiometer in accordance with JIS K2241.

[0079] The amount of the first resin attached to the fabric was 1.5 g / m 2 When the amount of the first resin adhered is in the above range, not only can the fixation of the ink to the fabric be improved, but also the coating liquid can be made less likely to penetrate into the interior of the fabric. From the same viewpoint, the amount of the first resin adhered is preferably 2.5 g / m or more. 2 More preferably, it is 2.5 to 6 g / m or more. 2 The amount of the first resin attached can be adjusted by the content of the first resin in the ink and the amount of ink attached.

[0080] Between this step and the step of applying the coating liquid, a step of drying and fixing the ink applied to the fabric by heating (drying and fixing step) may be further carried out. This increases the water repellency of the surface of the ink layer, and therefore, when the coating liquid is applied, it is possible to further prevent the coating liquid from penetrating into the interior of the fabric.

[0081] 3) A process of applying a coating liquid Next, a coating liquid is applied onto the ink layer of the fabric.

[0082] <Coating liquid> The coating liquid contains a second resin and water.

[0083] (Second resin) The second resin is a binder resin of the coating liquid, and is preferably a water-dispersible resin (resin particles). The second resin contains a resin that aggregates with an aggregating agent, preferably a water-dispersible resin having a group that reacts with the aggregating agent. For example, when the aggregating agent is a polyvalent metal compound (a compound having a cationic group), the second resin preferably contains a water-dispersible resin having an anionic group. The anionic group refers to a carboxyl group, a sulfo group (sulfonic acid group), a hydroxy group, etc.

[0084] The water-dispersible resin having an anionic group may be the same as the water-dispersible resin as the first resin, except that it has an anionic group. That is, the second resin preferably contains a urethane-based, styrene-acrylic-based, polycarbonate-based, (meth)acrylic-based, or vinyl chloride-vinyl acetate-based resin having an anionic group, and from the viewpoints of flexibility and feel to the skin, it is more preferable that the second resin contains a urethane-based resin having an anionic group.

[0085] The anionic group equivalent weight of the water-dispersible resin having an anionic group is not particularly limited, but may be in the same range as the anionic group equivalent weight of the pigment dispersant contained in the ink. The anionic group equivalent weight can be measured by the same method as above.

[0086] The Tg and average particle size range of the second resin can be the same as those of the first resin, respectively. In particular, the Tg of the second resin can be equal to or higher than that of the first resin, for example, the Tg of the second resin can be higher than -25°C; the difference between the Tg of the second resin and the first resin can be, for example, 10°C or more.

[0087] (Other ingredients) The coating liquid may further contain other components, as necessary, such as a water-soluble organic solvent, a surfactant, a preservative, an antiseptic, a pH adjuster, etc. The water-soluble organic solvent, surfactant, preservative, antiseptic, and pH adjuster may be the same as those described above.

[0088] <Application of coating liquid> The method for applying the coating liquid is not particularly limited, and may be any of a spray method, a mangle method (pad method), a coating method, and an inkjet method, as in the method for applying the pretreatment liquid. For example, when the ink application step and the method for applying the coating liquid are performed online, the inkjet method is preferred.

[0089] As described above, in the present invention, 1) the content of the second resin in the coating liquid is made smaller than the content of the first resin in the ink. By reducing the content of the second resin in the coating liquid, the reaction rate between the second resin and the aggregating agent on the ink layer can be appropriately reduced. This makes it difficult for the coating liquid to thicken excessively on the ink layer, making it easier for the coating liquid to wet and spread on the ink layer. Specifically, the content of the second resin in the coating liquid is preferably 0.5 times or less, and more preferably 0.1 to 0.3 times, the content of the first resin in the ink.

[0090] The content of the second resin in the coating liquid is preferably 1 to 15% by mass relative to the coating liquid. When the content of the second resin is 1% by mass or more, the second resin can easily cover the entire surface of the ink layer, making it easier to sufficiently improve rub fastness. When the content of the second resin is 15% by mass or less, the aggregation rate of the second resin caused by the aggregating agent becomes slower, making it easier for the coating liquid to wet and spread on the ink layer. From the same perspective, the content of the second resin is more preferably 3 to 8% by mass relative to the coating liquid.

[0091] The content of the second resin in the coating liquid or the amount of the second resin attached to the fabric may be adjusted depending on the amount of the aggregating agent attached to the fabric. That is, the second resin contained in the coating liquid reacts with the aggregating agent on the fabric or the ink layer to aggregate, which tends to thicken the coating liquid. Therefore, when the amount of aggregating agent attached to the fabric is large, it is preferable to reduce the content of the second resin in the coating liquid and increase the amount of the second resin attached to the fabric.

[0092] As described above, 2) the amount of coating liquid adhered to the fabric is greater than the amount of ink adhered to the fabric. A larger amount of coating liquid adheres to the fabric, making it easier for the coating liquid to cover the entire surface of the ink layer, thereby making it easier to obtain sufficient abrasion resistance. Specifically, the amount of coating liquid adhered to the fabric is preferably 1.4 times or more, and more preferably 1.5 to 2 times, the amount of ink adhered to the fabric.

[0093] Specifically, the amount of coating liquid applied to the fabric is 10 to 100 g / m 2 When the amount of coating liquid applied to the fabric is within the above range, not only is it easier to improve the resistance to friction, but the texture of the fabric is also less likely to be impaired. From the same viewpoint, the amount of coating liquid applied to the fabric is preferably 20 to 50 g / m 2 It is more preferable that:

[0094] The amount of coating liquid adhered to the fabric can be adjusted by the same method as above. For example, when the coating liquid is applied by an inkjet method, the amount per droplet (droplet amount), the number of ejected droplets, the ejection waveform, the ejection voltage, etc. For example, when the ink application step and the coating liquid application step are each performed by an inkjet method, the droplet amount of the coating liquid is preferably greater than the droplet amount of the ink.

[0095] The amount of the second resin attached is preferably less than the amount of the first resin attached, for example, 0.1 to 3 g / m 2 It is preferable that the density is 0.3 to 1.0 g / m 2 When the amount of the second resin attached is equal to or greater than the lower limit, the resistance to friction is more likely to be improved, and when it is equal to or less than the upper limit, the texture of the fabric is less likely to be impaired.

[0096] The surface tension of the coating liquid at 25°C is not particularly limited, but from the viewpoint of allowing the coating liquid to sufficiently wet and spread easily on the ink layer, it is preferably smaller than the surface tension of the ink at 25°C. Specifically, the surface tension of the coating liquid at 25°C is preferably 30 to 40 mN / m. The surface tension of the coating liquid can be adjusted, for example, by the content of the second resin, the solvent composition, the presence or absence of a surfactant, etc.

[0097] In the above embodiment, the wetting and spreading properties of the coating liquid vary depending on the amount of ink adhered, so the amount of coating liquid adhered may be adjusted depending on the amount of ink adhered. For example, from the viewpoint of prioritizing abrasion resistance, it is preferable to increase the amount of coating liquid adhered when the amount of ink adhered is large.

[0098] Furthermore, since the wettability of the ink or coating liquid on the fabric varies depending on the temperature and humidity of the atmosphere, the amount of ink or coating liquid applied may be adjusted depending on the temperature and humidity of the atmosphere. For example, when the humidity of the atmosphere is high, the wettability of the ink or coating liquid on the fabric increases, so it is preferable to reduce the amount of ink applied.

[0099] Furthermore, since the wettability of the ink or coating liquid on the fabric varies depending on the moisture content of the fabric, the amount of ink or coating liquid applied may be adjusted depending on the moisture content of the fabric. For example, when the moisture content of the fabric is high, the wettability of the ink or coating liquid on the fabric increases, so it is preferable to reduce the amount of ink or coating liquid applied.

[0100] Furthermore, the degree of deterioration in the texture of a fabric due to the application of a coating liquid also varies depending on the thickness of the fabric and the thickness of the fibers. Therefore, the amount of coating liquid applied may be adjusted depending on the thickness of the fabric and the thickness of the fibers. For example, when the thickness of the fabric is thick or the thickness of the fibers is thick, the amount of coating liquid applied may be increased.

[0101] The image-formed product obtained by the image-forming method of the present invention comprises, in this order, a fabric to which a flocculant is attached, an ink layer containing a pigment and a first resin, and a coating layer containing a second resin.

[0102] In the present invention, it is preferable that 95% by volume or more of the second resin derived from the coating liquid is distributed closer to the ink layer than to the center in the thickness direction of the fabric. The distribution state of the second resin can be confirmed by cutting the image-formed product along the thickness direction and observing the obtained cut surface with an optical microscope.

[0103] As described above, the distribution state of the second resin can be adjusted by the pretreatment of the fabric, the amount of the coagulant attached, the amount and type of the first resin (derived from the ink) attached, etc. For example, if the amount of the coagulant attached or the amount of the first resin attached is increased, the second resin is more likely to be distributed toward the ink layer side than in the center of the fabric in the thickness direction.

[0104] 2. Image forming equipment FIG. 1A is a schematic diagram showing an outline of an image forming apparatus according to one embodiment of the present invention, and FIG. 1B is an image diagram of dots when printed by the image forming apparatus of FIG. 1A.

[0105] Image forming apparatus 100 has a head carriage 110 equipped with a plurality of inkjet recording heads that eject ink droplets onto fabric 130, and a drying unit 120. In Fig. 1A, head carriage 110 and drying unit 120 are arranged in this order from the upstream side along the transport direction of fabric 130 (the direction of arrow X in the figure).

[0106] The head carriage 110 includes, for example, an inkjet recording head 111 that ejects a pretreatment liquid, an inkjet recording head 112 that ejects ink, and an inkjet recording head 113 that ejects a coating liquid. For convenience, only one inkjet recording head 112 that ejects ink is shown in Fig. 1A, but four inkjet recording heads 112 may be mounted, one for each of the four colors, and yellow, magenta, cyan, and black ink may be ejected from nozzles (not shown) of each inkjet recording head 112.

[0107] The droplet volumes of the pretreatment liquid ejected from the inkjet recording head 111, the ink ejected from the inkjet recording head 112, and the coating liquid ejected from the inkjet recording head 113 are preferably each 10 to 50 pL. For example, the droplet volume (d3) of the coating liquid is preferably greater than the droplet volume (d1) of the pretreatment liquid and the droplet volume (d2) of the ink, particularly the droplet volume (d2) of the ink (see FIG. 1B). Specifically, the droplet volumes of the pretreatment liquid and the ink are more preferably 20 to 30 pL, and the droplet volume of the coating liquid is more preferably 30 to 50 pL. This is to increase the coverage of the surface of the ink layer with the coating liquid. The droplet volume and deposition amount of each liquid are adjusted by a control unit (not shown) controlling the inkjet recording heads 111, 112, and 113.

[0108] The drying unit 120 can be a known dryer such as a hot air dryer that blows hot air or an irradiator that irradiates infrared rays or ionizing radiation.

[0109] In the image forming apparatus 100, the fabric 130 is transported below the head carriage 110. Next, droplets of a pretreatment liquid are ejected from the inkjet recording head 111 mounted on the head carriage 110 to apply the pretreatment liquid to the fabric 130. Next, droplets of ink are ejected from the inkjet recording head 112 to apply the ink. Next, droplets of a coating liquid are ejected from the inkjet recording head 113 to apply the coating liquid. Thereafter, the image formed on the fabric 130 is dried by, for example, blowing temperature-controlled air from the drying unit 120.

[0110] In the image forming apparatus 100 according to the above embodiment, an example has been shown in which the pretreatment liquid, ink, and coating liquid are applied and then dried all at once, but a drying step may be performed between each of the pretreatment liquid application step, ink application step, and coating liquid application step.

[0111] In the above embodiment, the steps of applying a pretreatment liquid, applying an ink, and applying a coating liquid are performed continuously online, but the steps of applying a pretreatment liquid and applying a coating liquid may be performed offline. In this case, the steps of applying a pretreatment liquid and applying a coating liquid may be performed by a method other than the inkjet method, such as a dipping method or a mangle method.

[0112] Furthermore, the image forming apparatus 100 according to the above embodiment may be configured to adjust the amount of coating liquid applied in accordance with the amount of ink applied. For example, the image forming apparatus 100 may be configured to have an image acquisition unit (not shown) for acquiring the amount of ink applied, and the control unit may adjust the amount of coating liquid applied based on the acquired data on the amount of ink applied.

[0113] Furthermore, the image forming apparatus 100 according to the above embodiment may be configured to adjust the amount of ink or coating liquid applied depending on the temperature and humidity of the atmosphere and the moisture content of the fabric. For example, the image forming apparatus 100 may be configured to have a sensor (not shown) that acquires the temperature and humidity of the atmosphere, the moisture content of the fabric, etc., and the control unit may be configured to adjust the amount of ink or coating liquid applied based on the acquired data on the temperature and humidity of the atmosphere and the moisture content of the fabric. [Example]

[0114] The present invention will be described below with reference to examples, which should not be construed as limiting the scope of the present invention.

[0115] 1. Preparation of pretreatment liquid, ink, and coating liquid 1-1. Preparation of pretreatment solution <Preparation of pretreatment solution 1> A pretreatment liquid (containing 5% by mass of flocculant) was prepared by mixing 5% by mass of Epomin P-1000 (registered trademark) (polyethyleneimine) manufactured by Nippon Shokubai Co., Ltd. as a flocculant, 40% by mass of ethylene glycol as a solvent, and the remainder, ion-exchanged water, so that the total amount was 100% by mass.

[0116] <Preparation of pretreatment solution 2> Pretreatment liquid 2 (flocculant content: 5% by mass) was prepared in the same manner as pretreatment liquid 1, except that lactic acid was used as the flocculant.

[0117] 1-2. Ink preparation <Preparation of Ink 1> (Preparation of pigment dispersion) CAB-O-JET (registered trademark) 465M (pigment dispersion) manufactured by Cabot Corporation was added as a magenta pigment and premixed, and then dispersed using a sand grinder filled with 0.5 mm zirconia beads at a volume ratio of 50%, to obtain a magenta pigment dispersion with a pigment concentration of 3 mass%.

[0118] (Preparation of First Resin Dispersion) A surfactant solution prepared by dissolving 2.52 g of anionic surfactant (sodium dodecylbenzenesulfonate: SDS) and 0.58 g of sodium carbonate in 553 g of ion-exchanged water was placed in a separable flask equipped with a stirrer, a temperature sensor, a condenser, and a nitrogen introducing device, and the internal temperature was raised to 80°C while stirring at a stirring speed of 330 rpm under a nitrogen stream. On the other hand, 160 g of n-butyl acrylate (BA) and 27.5 g of methyl methacrylate (MMA) were dissolved to prepare a monomer solution. Next, a solution was prepared by dissolving 0.07 g of a polymerization initiator (potassium persulfate: KPS) in 2.66 g of ion-exchanged water and heated to 80°C. The monomer solution prepared above was added dropwise to this solution over 60 minutes with stirring. After the dropwise addition was completed, the solution was heated and stirred for an additional 120 minutes and then cooled to 40°C to obtain an aqueous dispersion (first resin dispersion) of acrylic resin 1 (BA / MMA = 90 / 10 mass ratio, Tg: -30°C, average particle size 80 nm).

[0119] (Ink Preparation) Next, the following components were mixed to a total of 100 parts by mass to obtain ink 1. The pigment dispersion liquid prepared above: 8.7 parts by mass (solid content 23 parts by mass) The first resin dispersion liquid prepared above: 60 parts by mass (solid content 30 parts by mass) Propylene glycol: 20 parts by mass Glycerin: 10 parts by mass Ion-exchanged water: Remaining

[0120] <Preparation of Inks 2 and 4> Inks 2 and 4 were prepared in the same manner as Ink 1, except that the amount of the first resin dispersion was changed so that the content of the first resin would be the value shown in Table 1.

[0121] <Preparation of Ink 3> Ink 3 was prepared in the same manner as Ink 1, except that the aqueous dispersion of acrylic resin 1 was changed to an aqueous dispersion of urethane resin (Takelac W6061, manufactured by Mitsui Chemicals, Inc., Tg: -20°C) and the content of urethane resin was changed to the amount shown in Table 1.

[0122] The surface tensions of inks 1 to 4 were measured by the following method.

[0123] <Surface tension measurement> The surface tension of the resulting ink was measured at 25° C. using a Wilhelmy surface tensiometer manufactured by Kyowa Interface Science Co., Ltd. in accordance with JIS K2241.

[0124] [Table 1]

[0125] 1-3. Preparation of coating solution <Preparation of Coating Solution 1> Aqueous dispersion of urethane resin (second resin dispersion, manufactured by Mitsui Chemicals, Takelac W6061, Tg: -20°C): equivalent to 0.5 parts by mass of solids Propylene glycol: 20 parts by mass Glycerin: 10 parts by mass Ion-exchanged water: Remaining

[0126] <Preparation of Coating Solutions 2 to 5> Coating liquids 2 to 5 were prepared in the same manner as coating liquid 1, except that the blending amount of the second resin dispersion was changed so that the content of the second resin would be the value shown in Table 2.

[0127] The surface tensions of the coating solutions 1 to 5 were measured in the same manner as above.

[0128] [Table 2]

[0129] 2. Image formation and evaluation <Tests 1-23> (1) Pretreatment The fabric used was cotton broadcloth 40 (100% cotton). Next, an inkjet printer having an inkjet recording head A for the pretreatment liquid, an inkjet recording head B for the ink, and an inkjet recording head C for the coating liquid (all Konica Minolta heads KM1024iMAE) was prepared as an image forming apparatus. The pretreatment liquid shown in Table 3 was then ejected from the nozzles of inkjet recording head A to form a solid image on the fabric. Specifically, an image including a fine line grid, gradation, and solid areas was formed at 720 dpi in the main scanning direction and 720 dpi in the sub-scanning direction. dpi represents the number of ink droplets (dots) per 2.54 cm. The ejection frequency was 22.4 kHz, and the droplet volume (d1) of the pretreatment liquid was 25 pL. The fabric to which the pretreatment liquid had been applied was then dried in a dryer at 150°C.

[0130] (2) Applying ink Next, the inks shown in Table 3 were ejected from the nozzles of the inkjet recording head B of the image forming apparatus to form solid images (ink layers) on the pretreated fabric. The ink application conditions were the same as above, except that the ink droplet volume (d2) was 45 pL and the ink deposition amount was the amount shown in Table 3. Thereafter, the ink-coated fabric was dried in a dryer at 150°C for 3 minutes.

[0131] (3) Applying coating liquid Next, the coating liquid shown in Table 3 was ejected from the nozzles of the inkjet recording head C of the image forming apparatus to form a solid image (coating layer) on the ink layer of the fabric. The conditions for applying the coating liquid were the same as above, except that the droplet volume (d3) of the coating liquid was 25 pL and the amount of the coating liquid attached was the amount shown in Table 3. Then, the substrate was dried in a dryer at 150°C for 3 minutes to obtain an image-formed product.

[0132] <Evaluation> The wetting and spreading of the coating liquid used in Tests 1 to 23, and the rubbing fastness and texture of the resulting image-formed products were evaluated by the following methods.

[0133] (1) Wetting and spreading The degree of wetting and spreading of the coating liquid was observed using an optical microscope to measure the coverage of the coating liquid in a dry state when inkjet coated at a resolution of 720 x 720 dpi. To evaluate the wetting and spreading, a small amount of cyan pigment dispersion was added to the coating liquid to make it easier to observe. The evaluation was based on the following criteria: ○: There are no gaps between the dots, and the entire ink dot is completely covered △: There are gaps between the dots in places ×: There are gaps between the dots If it was △ or better, it was judged to be good.

[0134] (2) Rubbing resistance (dry rubbing resistance) The dry rub fastness of the resulting image-formed product was evaluated using a crock meter (rubbing tester) in accordance with ISO 105 X-19:2020 (JIS L 0849). The staining gray scale based on JIS 0805 was used as the evaluation cloth, and the grade was determined and evaluated according to the following index. A score of 2 to 3 or higher was considered acceptable.

[0135] (3) Texture The texture of the image-formed product and the fabric was evaluated sensorily by touching with the fingers, based on the following criteria. ◎: Maintains the original softness of the fabric to a high degree 〇: Maintains the original softness of the fabric △: The original softness of the fabric has been lost and it has become a little hard, but there is no problem in practical use. ×: The fabric is stiffer than it should be, and the texture of the fabric is lost. If it was △ or better, it was judged to be good.

[0136] The evaluation results of tests 1 to 23 are shown in Table 3.

[0137] [Table 3]

[0138] As shown in Table 3, the image-formed products (Examples) of Tests 1 to 3, 6 to 10, 13 to 15, 16 to 19 and 21 all had good wetting and spreading of the coating liquid, and exhibited good rub fastness and texture.

[0139] In particular, it can be seen that the texture improves by appropriately increasing the amount of the first resin attached (comparison of Tests 8 and 17). This is presumably because the first resin derived from the ink is more flexible than the second resin derived from the coating liquid, and therefore the effect of suppressing the deterioration of texture due to penetration of the coating liquid into the interior of the fabric is greater than the deterioration of texture due to an increase in the amount of the first resin attached.

[0140] In contrast, Tests 4 and 5, in which the content of the second resin in the coating liquid was equal to or greater than the content of the first resin in the ink, showed inferior texture. Tests 11 and 12, in which the amount of coating liquid applied was equal to or less than the amount of ink applied, showed inferior rub fastness. Test 20, in which fabric not treated with a flocculant was used, showed that although the ink and coating liquid spread relatively well, they easily penetrated into the fabric, causing the fabric to harden and impairing the texture. Furthermore, because the ink did not flocculate and penetrated into the fabric, it was found that the pigment was less likely to remain on the surface of the fabric, and there was no problem with rub fastness itself. [Industrial Applicability]

[0141] According to the present invention, it is possible to provide an image forming method capable of forming an image having good resistance to friction without impairing the texture of the fabric. [Explanation of symbols]

[0142] 100 Image forming device 110 Head carriage 111, 112, 113 Inkjet recording head 120 Dryer 130 Fabric

Claims

1. Providing a fabric having a flocculant attached thereto; applying a water-based ink containing a pigment, a first resin, and water onto the fabric to which the flocculant has been attached; applying a coating liquid containing a second resin and water onto the applied water-based ink; Including, the flocculant comprises a cationic polymer or an organic acid; the second resin is agglomerated by the aggregating agent and includes a water-dispersible resin having an anionic group; the content (mass%) of the second resin in the coating liquid is less than the content (mass%) of the first resin in the water-based ink, the amount (g / m 2 ) of the coating liquid adhered to the fabric is 1.4 to 2 times the amount (g / m 2 ) of the water-based ink adhered to the fabric; Image forming method.

2. the content of the second resin in the coating liquid is 0.5 times or less the content of the first resin in the water-based ink; The image forming method according to claim 1 .

3. The content of the second resin in the coating liquid is 1 to 15% by mass with respect to the coating liquid. The image forming method according to claim 1 or 2.

4. the content of the first resin in the water-based ink is 10 to 35% by mass relative to the water-based ink; The image forming method according to any one of claims 1 to 3.

5. The amount of the coating liquid applied to the fabric is 10 to 100 g / m ２ That is, The image forming method according to any one of claims 1 to 4.

6. The amount of the first resin attached to the fabric is 2.5 g / m ２ That's all. The image forming method according to any one of claims 1 to 5.

7. The glass transition temperature Tg of the first resin is lower than the glass transition temperature Tg of the second resin. The image forming method according to any one of claims 1 to 6.

8. the first resin contains a (meth)acrylic resin having a glass transition temperature Tg of −25° C. or lower; The image forming method according to any one of claims 1 to 7.

9. The second resin includes a urethane-based resin. The image forming method according to any one of claims 1 to 8.

10. the surface tension of the coating liquid at 25°C is lower than the surface tension of the water-based ink at 25°C; The image forming method according to any one of claims 1 to 9.

11. The amount of the coating liquid adhered to the fabric is adjusted according to the amount of the flocculant adhered to the fabric. The image forming method according to any one of claims 1 to 10.

12. the water-based ink and the coating liquid are applied by an inkjet method, the droplet volume (pL) of the coating liquid is greater than the droplet volume (pL) of the water-based ink; The image forming method according to any one of claims 1 to 11.

Images