Adhesive liquid, image formation system, and image formation method

Abstract

To provide an adhesive liquid which is excellent in transferability of a printed layer and washing fastness of a printing medium after image transfer.SOLUTION: An adhesive liquid contains water, resin particles, an organic solvent, a crosslinking agent, and a surface active agent, wherein a weight change rate X before and after drying satisfies the following expression (1) or the following expression (2), and a storage elastic modulus E' at 110°C of a film after the adhesive liquid has been dried, before being heated and pressurized, is 5.4×106 Pa or less. A represents a weight ratio of the water in the total amount of the adhesive liquid, and B represents a weight ratio of the water and the organic solvent in the total amount of the adhesive liquid. Expression (1): X<A. Expression (2): A≤X<B.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present disclosure relates to an adhesive liquid, an imaging system, and an imaging method. [Background technology]

[0002] Patent Document 1 discloses an image forming method for forming an image on a transfer-receiving body (printing medium) using an intermediate transfer recording medium in which a printing layer and an adhesive layer are formed on a transfer medium. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-066789 Summary of the Invention [Problem to be solved by the invention]

[0004] It is conceivable that an inkjet printer forms a printing layer, such as a color print or a white print, on a transfer medium, and then a powder adhesive is applied to the printing layer by a device separate from the inkjet printer, and the applied powder is heated and melted to produce an intermediate transfer recording medium. In this case, heat and pressure are applied while the intermediate transfer recording medium and the printing medium are superimposed, and the transfer medium is peeled off, thereby transferring the printing layer formed on the transfer medium to the printing medium. Alternatively, it is conceivable that the powder adhesive is replaced with a liquid adhesive (adhesive liquid). In this case, the inkjet printer ejects ink and adhesive liquid onto the intermediate transfer recording medium, which is then dried to produce an intermediate transfer recording medium with an adhesive layer formed on the printing layer.

[0005] If the adhesive layer formed after drying is hard, there is a possibility that the printing layer will not transfer properly to the printing medium when the transfer medium is peeled off from the printing medium. Furthermore, the printing layer transferred to the printing medium may not be able to withstand the bending and folding forces that occur during washing, which may cause the image formed on the printing medium to crack.

[0006] Therefore, an object of the present disclosure is to provide an adhesive liquid, an image forming system, and an image forming method that provide good transferability of the print layer and good washing fastness of the print medium after image transfer. [Means for solving the problem]

[0007] In order to achieve the above object, the adhesive liquid of the present disclosure comprises: An adhesive liquid that is ejected from an ejection head onto ink on a transfer medium having an ink-receiving layer, and that adheres an image formed by the ink to the print medium by applying heat and pressure after drying, The composition includes water, resin particles, an organic solvent, a crosslinking agent, and a surfactant, The weight change rate X before and after drying satisfies the following formula (1) or the following formula (2), The storage modulus E' of the coating obtained by drying the adhesive solution at 110°C before the application of heat and pressure was 5.4 × 10 6 Pa or less. X A≦X In the formulas (1) and (2), A is the weight ratio of the water to the total amount of the adhesive liquid, In the formula (2), B is the weight ratio of the water and the organic solvent to the total amount of the adhesive liquid.

[0008] The image forming system of the present disclosure includes: an ink storage section; an ink ejection unit that ejects the ink stored in the ink storage unit onto a transfer medium by an inkjet method; an adhesive liquid storage section;​​ an adhesive liquid ejection unit that ejects the adhesive liquid stored in the adhesive liquid storage unit onto the ink on the transfer medium by an inkjet method; a drying unit that dries the transfer medium onto which the adhesive liquid has been ejected; a contact heating section that applies heat and pressure to adhere the image formed by the ink to a print medium after the drying; Equipped with the adhesive liquid contains water, resin particles, an organic solvent, a crosslinking agent, and a surfactant; The weight change rate X before and after drying satisfies the following formula (1) or the following formula (2), The storage modulus E' of the coating obtained by drying the adhesive solution at 110°C before the application of heat and pressure was 5.4 × 10 6 Pa or less. X A≦X In the formulas (1) and (2), A is the weight ratio of the water to the total amount of the adhesive liquid, In the formula (2), B is the weight ratio of the water and the organic solvent to the total amount of the adhesive liquid.

[0009] The image forming method of the present disclosure includes: The method includes an ink ejection step, an adhesive liquid ejection step, a drying step, and a contact heating step, the ink ejection step includes a step of ejecting ink onto a transfer medium by an inkjet method; the adhesive liquid ejection step includes a step of ejecting adhesive liquid onto the ink on the transfer medium by an inkjet method; the drying step includes a step of drying the transfer medium onto which the adhesive liquid has been ejected, the contact heating step includes applying heat and pressure to adhere the image formed by the ink to a print medium after the drying step; the adhesive liquid contains water, resin particles, an organic solvent, a crosslinking agent, and a surfactant; ​​The weight change rate X before and after drying satisfies the following formula (1) or the following formula (2), The storage modulus E' of the coating obtained by drying the adhesive solution at 110°C before the application of heat and pressure was 5.4 × 10 6 Pa or less. X A≦X In the formulas (1) and (2), A is the weight ratio of the water to the total amount of the adhesive liquid, In the formula (2), B is the weight ratio of the water and the organic solvent to the total amount of the adhesive liquid. [Effects of the Invention]

[0010] The adhesive liquid, image forming system, and image forming method of the present disclosure provide good transferability of the print layer and good wash fastness of the print medium after image transfer. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a schematic perspective view showing a configuration of an example of an image forming system of the present disclosure. [Figure 2] FIG. 2 is a plan view showing in perspective the internal structure of the image forming apparatus in the image forming system of the present disclosure. [Figure 3] FIG. 3 is a block diagram showing a schematic configuration of the image forming system of the present disclosure. [Figure 4] FIG. 4 is a block diagram showing an example of the configuration of the control unit of the image forming apparatus in the image forming system of the present disclosure. [Figure 5] FIG. 5 is a flowchart showing an example of steps in the image forming method of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0012] ​​An embodiment of the present disclosure will be described. However, the present disclosure is not limited to the following embodiment. In the following drawings, the same parts are denoted by the same reference numerals. Furthermore, the descriptions of the embodiments can be used interchangeably unless otherwise specified. Furthermore, the configurations of the embodiments can be combined unless otherwise specified.

[0013] First, the water, resin particles, organic solvent, crosslinking agent, and surfactant in the present disclosure will be described.

[0014] Examples of the water include ion-exchanged water and pure water. The content of the water relative to the total amount of the adhesive liquid (water ratio) is appropriately determined depending on the desired properties, etc. The water ratio may be, for example, the remainder of the other components. The water content is, for example, 5% by weight to 50% by weight, 5% by weight to 45% by weight, or 8% by weight to 40% by weight.

[0015] The resin particles may be contained in, for example, a resin emulsion. The resin emulsion is composed of, for example, the resin particles and a dispersion medium (e.g., water, etc.), and the resin particles are not dissolved in the dispersion medium but are dispersed with a specific particle diameter. The resin particles may be, for example, commercially available products. Examples of the resin particles include resin particles whose main component is polyurethane, polyacrylic acid, or polyacrylic acid ester. One type of resin particle may be used, or two or more types of resin particles may be used.

[0016] Examples of commercially available resin particles include "Takelac (registered trademark) WS6021" and "Takelac (registered trademark) W6110" manufactured by Mitsui Chemicals, Inc.; and "Movinyl (registered trademark) W6761" manufactured by Japan Coating Resins Co., Ltd.

[0017] In the adhesive liquid, the solid content of the resin particles (which can also be considered as the amount of active ingredient) relative to the total amount of the adhesive liquid is, for example, 20% by weight to 90% by weight, 30% by weight to 80% by weight, or 50% by weight to 70% by weight. Note that, for example, when a resin emulsion containing the resin particles is used, the "amount of active ingredient" refers to the amount of the resin particles themselves excluding a dispersion medium such as water.

[0018] Examples of the organic solvent include a wetting agent that prevents the adhesive liquid from drying on the nozzle surface of the ejection head, and a penetrating agent that adjusts the drying speed on the printing medium.

[0019] The wetting agent is not particularly limited and may include, for example, lower alcohols such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol, and tert-butyl alcohol; amides such as dimethylformamide and dimethylacetamide; ketones such as acetone; ketoalcohols such as diacetone alcohol; ethers such as tetrahydrofuran and dioxane; polyethers such as polyalkylene glycols; polyhydric alcohols such as alkylene glycol, glycerin, trimethylolpropane, and trimethylolethane; 2-pyrrolidone; N-methyl-2-pyrrolidone; and 1,3-dimethyl-2-imidazolidinone. Examples of the polyalkylene glycol include polyethylene glycol and polypropylene glycol. Examples of the alkylene glycol include ethylene glycol, propylene glycol, butylene glycol, diethylene glycol, triethylene glycol, dipropylene glycol, tripropylene glycol, thiodiglycol, and hexylene glycol. One type of wetting agent may be used, or two or more types of wetting agents may be used.

[0020] The content of the wetting agent in the total amount of the adhesive liquid is, for example, 0% by weight to 50% by weight, 3% by weight to 50% by weight, or 3% by weight to 20% by weight.

[0021] Examples of the penetrating agent include alkylene diols, glycol ether compounds, etc. Examples of the alkylene diols include 1,2-hexanediol, 1,2-heptanediol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol, 3-methyl-1,3-butanediol, 1,3-propanediol, 1,2-butanediol, 1,2-pentanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 2-methyl-2,4-pentanediol, and 3-methyl-1,5-pentanediol. Examples of the glycol ether compounds include ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol-n-propyl ether, diethylene glycol methyl ether, diethylene glycol ethyl ether, diethylene glycol-n-propyl ether, diethylene glycol-n-butyl ether, diethylene glycol-n-hexyl ether, triethylene glycol methyl ether, triethylene glycol ethyl ether, triethylene glycol-n-propyl ether, triethylene glycol-n-butyl ether, propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol-n-propyl ether, propylene glycol-n-butyl ether, dipropylene glycol methyl ether, dipropylene glycol ethyl ether, dipropylene glycol-n-propyl ether, dipropylene glycol-n-butyl ether, tripropylene glycol methyl ether, tripropylene glycol ethyl ether, tripropylene glycol-n-propyl ether, tripropylene glycol-n-butyl ether, etc. One type of penetrating agent may be used, or two or more types of penetrating agents may be used.

[0022] The content of the penetrant relative to the total amount of the adhesive liquid is, for example, 0% by weight to 20% by weight, 1% by weight to 20% by weight, or 1% by weight to 15% by weight.

[0023] Examples of the crosslinking agent include an oxazoline group-containing compound, a carbodiimide group-containing compound, an isocyanate group-containing compound, an aziridine group-containing compound, an epoxy group-containing compound, and an aqueous crosslinking agent obtained by imparting a hydrophilic segment to a polycarbodiimide resin.

[0024] The crosslinking agent may be, for example, a commercially available product, such as "Epocross (registered trademark) WS-700" manufactured by Nippon Shokubai Co., Ltd., which is an oxazoline group-containing water-soluble polymer, or "SU-268A" manufactured by Meisei Chemical Industry Co., Ltd., which is an aqueous crosslinking agent in which the isocyanate group is masked with a blocking agent.

[0025] As the surfactant, for example, commercially available products may be used, and specific examples of the surfactant include silicone-based surfactants and acetylene-based surfactants.

[0026] Examples of commercially available silicone surfactants include "Silface (registered trademark) SAG002," "Silface (registered trademark) SAG005," and "Silface (registered trademark) SAG503A," all manufactured by Nissin Chemical Industry Co., Ltd.

[0027] Examples of commercially available acetylene surfactants include "Olfine (registered trademark) E1004," "Olfine (registered trademark) E1008," and "Olfine (registered trademark) E1010" manufactured by Nissin Chemical Industry Co., Ltd.; "Surfynol (registered trademark) 440," "Surfynol (registered trademark) 465," and "Surfynol (registered trademark) 485" manufactured by Air Products and Chemicals, Inc.; and "Acetylenol (registered trademark) E40" and "Acetylenol (registered trademark) E100" manufactured by Kawaken Fine Chemicals Co., Ltd.

[0028] The surfactant may further contain other surfactants in addition to or instead of the silicone surfactant and the acetylene surfactant. Examples of the other surfactants include nonionic surfactants, anionic surfactants, and cationic surfactants. One type of surfactant may be used, or two or more types of wetting agents may be used.

[0029] The content of the surfactant in the total amount of the adhesive liquid is, for example, 0.1% by mass to 2% by mass, 0.3% by mass to 1.5% by mass, or 0.3% by mass to 0.5% by mass.

[0030] The adhesive liquid of the present disclosure may further contain conventionally known additives, such as a pH adjuster, a viscosity adjuster, a surface tension adjuster, and an anti-mold agent, if necessary.

[0031] Next, the adhesive liquid of the present disclosure will be specifically described.

[0032] The weight change rate X of the adhesive liquid before and after drying according to the present disclosure satisfies the following formula (1) or (2). X A≦X

[0033] In the formulas (1) and (2), A represents the weight ratio of water to the total amount of the adhesive liquid. That is, when the adhesive liquid of the present disclosure contains only water, resin particles, an organic solvent, a crosslinking agent, and a surfactant, A represents the weight ratio of water to the total weight of water, resin particles, an organic solvent, a crosslinking agent, and a surfactant. Therefore, when the adhesive liquid of the present disclosure further contains the additives, etc., A represents the weight ratio of water to the total weight of water, resin particles, an organic solvent, a crosslinking agent, a surfactant, and the additives, etc.

[0034] ​​Satisfying formula (1) means that even after the drying step in the image forming method of the present disclosure described below, the water and the high-boiling-point solvent contained in the organic solvent remain in the coating formed by drying the adhesive liquid (in a semi-dried state). For example, if the print medium to which an image formed with ink is to be adhered is fabric or the like, a semi-dried coating facilitates penetration of the coating between the fibers of the fabric. This improves the adhesion between the image and the print medium after the contact heating step described below. Therefore, when transferring the image to the print medium, even if the transfer medium described below is peeled off from the print medium, transfer defects are less likely to occur.

[0035] In the formula (2), B is the weight ratio of the water and the organic solvent to the total amount of the adhesive liquid. That is, when the adhesive liquid of the present disclosure contains only water, resin particles, an organic solvent, a crosslinking agent, and a surfactant, B in the formula (2) means the weight ratio of the water and the organic solvent to the total weight of the water, resin particles, the organic solvent, the crosslinking agent, and the surfactant. Therefore, when the adhesive liquid of the present disclosure further contains the additives, etc., B in the formula (2) means the weight ratio of the water and the organic solvent to the total weight of the water, resin particles, the organic solvent, the crosslinking agent, the surfactant, and the additives, etc.

[0036] Satisfying formula (2) above means that the high-boiling-point solvent contained in the organic solvent remains in the coating (semi-dried) even after the drying process in the image forming method of the present disclosure, which will be described later. It also means that the water contained in the adhesive liquid is in a sufficiently dried state. When the print medium is a fabric or the like, a semi-dried coating facilitates penetration between the fibers of the fabric. This improves the adhesion between the image and the print medium after the contact heating process, which will be described later. Furthermore, the coating is less likely to strike through the print medium than when formula (1) above is satisfied. That is, because the amount of penetration of the coating into the print medium is small, the coating is less likely to penetrate to the side opposite the printed surface of the print medium. Therefore, when the image is transferred to the print medium, the coating does not strike through the print medium, and transfer defects are less likely to occur even if the transfer medium is peeled off from the print medium.

[0037] As described above, the adhesive liquid of the present disclosure has a storage modulus E' of 5.4 x 10 at 110°C of the coating obtained by drying the adhesive liquid before the application of heat and pressure. 6 That is, the storage modulus E' of the coating at 110°C after the drying step and before the contact heating step is 5.4 × 10 Pa or less. 6 The upper limit of the storage modulus E' at 110°C is, for example, 5.0 × 10 6 Pa or less, 4.0×10 6 Pa or less, 3.5×10 6 Pa or less, or 3.0 x 10 6 The lower limit may be, for example, 7.0 × 10 5 Pa or higher, 8.0×10 5 Pa or higher, 9.0×10 5 Pa or more, 1.0×10 6 Pa or more, or 1.5 x 10 6 It may be more than Pa.

[0038] By satisfying the storage modulus E' at 110°C, for example, when the print medium is a fabric, the coating can easily penetrate between the fibers of the fabric. This improves adhesion between the image and the print medium after the contact heating step described below. Furthermore, even when the fabric on which the image is formed is washed, the formed image is less likely to crack, improving washing fastness.

[0039] The adhesive liquid of the present disclosure has a storage modulus E' of 8.1 x 10 at 25°C of a coating obtained by drying the adhesive liquid before applying the heat and pressure. 6 That is, the storage modulus E' of the coating at 25°C after the drying step and before the contact heating step is 8.1 × 10 6 The upper limit of the storage modulus E' at 25°C is, for example, 8.0 × 10 6 Pa or less, 7.0×10 6 Pa or less, or 6.5 x 10 6 The lower limit may be, for example, 2.0 × 10 6 Pa or more, 2.5×10 6 Pa or higher, 3.0×10 6 Pa or more, or 4.0 x 10 6 It may be more than Pa.

[0040] By satisfying the storage modulus E' at 25°C, for example, even when the fabric on which an image is formed is washed, the formed image is less likely to crack, thereby further improving washing fastness.

[0041] The ink for forming the image includes, for example, a coloring material, which may include, for example, a pigment, a dye, or the like.

[0042] The pigment is not particularly limited and may be, for example, carbon black, inorganic pigments, or organic pigments. Examples of carbon black include furnace black, lamp black, acetylene black, and channel black. Examples of inorganic pigments include titanium oxide, iron oxide-based inorganic pigments, and carbon black-based inorganic pigments. Examples of organic pigments include azo pigments such as azo lake pigments, insoluble azo pigments, condensed azo pigments, and chelate azo pigments; polycyclic pigments such as phthalocyanine pigments, perylene and perinone pigments, anthraquinone pigments, quinacridone pigments, dioxazine pigments, thioindigo pigments, isoindolinone pigments, and quinophthalone pigments; dye lake pigments such as basic dye lake pigments and acid dye lake pigments; nitro pigments; nitroso pigments; and aniline black daylight fluorescent pigments. Other pigments may also be used as long as they are dispersible in an aqueous phase. Specific examples of these pigments include, for example, CI Pigment White 1, 4, 5, 6, 7, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, and 28; CI Pigment Black 1, 6, and 7; CI Pigment Yellow 1, 2, 3, 12, 13, 14, 15, 16, 17, 55, 74, 78, 150, 151, 154, 180, 185, and 194; CI Pigment Orange 31 and 43; and CI Pigment Red 2, 3, 5, 6, 7, 12, 15, 16, 48, and 48. CI Pigment Violet 19 and 196; CI Pigment Blue 1, 2, 3, 15, 15:1, 15:2, 15:3, 15:4, 16, 22, and 60; CI Pigment Green 7 and 36; and solid solutions of these pigments.

[0043] The pigment may be dispersed in a solvent using a resin dispersant (also referred to as a resin-dispersed pigment). Examples of the resin dispersant include common polymer dispersants (also referred to as pigment-dispersing resins or resin dispersants), and these may be prepared in-house. Furthermore, in the adhesive liquid of the present disclosure, the pigment may be encapsulated in a polymer. Examples of the resin dispersant include those containing at least one of methacrylic acid and acrylic acid as a monomer, and commercially available products may be used. Examples of the resin dispersant include hydrophobic monomers such as styrene, styrene derivatives, vinyl naphthalene, vinyl naphthalene derivatives, and aliphatic alcohol esters of α,β-ethylenically unsaturated carboxylic acids; or block copolymers, graft copolymers, or random copolymers composed of two or more monomers selected from the group consisting of acrylic acid, acrylic acid derivatives, maleic acid, maleic acid derivatives, itaconic acid, itaconic acid derivatives, fumaric acid, and fumaric acid derivatives, or salts thereof. Examples of the commercially available products include "JONCRYL (registered trademark) 611," "JONCRYL (registered trademark) 60," "JONCRYL (registered trademark) 586," "JONCRYL (registered trademark) 687," "JONCRYL (registered trademark) 63," and "JONCRYL (registered trademark) HPD296" manufactured by Johnson Polymer Co., Ltd.; "Disperbyk190" and "Disperbyk191" manufactured by BYK-Chemie; and "Solsperse 20000" and "Solsperse 27000" manufactured by Zena Chemical.

[0044] The method for dispersing the pigment using the pigment dispersing resin may be, for example, a method of dispersing the pigment using a dispersing device. The dispersing device used for dispersing the pigment is not particularly limited as long as it is a general dispersing machine, and examples thereof include a ball mill, a roll mill, and a sand mill (e.g., a high-speed type).

[0045] The pigment may be a self-dispersing pigment. The self-dispersing pigment is, for example, one in which at least one hydrophilic functional group, such as a carbonyl group, a hydroxyl group, a carboxylic acid group, a sulfonic acid group, or a phosphate group, or a salt thereof, is chemically bonded to the pigment particle, either directly or via another group, thereby enabling dispersion in water without the use of a dispersant. The self-dispersing pigment may be one treated by methods described, for example, in JP-A-8-3498, JP-T-2000-513396, JP-T-2008-524400, JP-T-2009-515007, or JP-T-2011-515535. Both inorganic and organic pigments can be used as raw materials for the self-dispersing pigment. Examples of pigments suitable for the treatment include carbon blacks such as "MA8" and "MA100" manufactured by Mitsubishi Chemical Corporation. The self-dispersing pigment may also be a commercially available product. Examples of commercially available products include "CAB-O-JET (registered trademark) 200," "CAB-O-JET (registered trademark) 250C," "CAB-O-JET (registered trademark) 260M," "CAB-O-JET (registered trademark) 270Y," "CAB-O-JET (registered trademark) 300," "CAB-O-JET (registered trademark) 400," "CAB-O-JET (registered trademark) 450C," "CAB-O-JET (registered trademark) 465M," and "CAB-O-JET (registered trademark) 470Y" manufactured by Cabot Corporation; "BONJET (registered trademark) BLACK CW-2" and "BONJET (registered trademark) BLACK CW-3" manufactured by Orient Chemical Industry Co., Ltd.; and "LIOJET (registered trademark) WD BLACK 002C" manufactured by Toyo Ink Mfg. Co., Ltd.

[0046] The pigment may be one type of pigment or two or more types of pigments.

[0047] The dye is not particularly limited, and examples thereof include direct dyes, acid dyes, basic dyes, and reactive dyes. Specific examples of the dyes include CI Direct Black, CI Direct Blue, CI Direct Red, CI Direct Yellow, CI Direct Orange, CI Direct Violet, CI Direct Brown, CI Direct Green, CI Acid Black, CI Acid Blue, CI Acid Red, CI Acid Yellow, CI Acid Orange, CI Acid Violet, CI Basic Black, CI Basic Blue, CI Basic Red, CI Basic Violet, and CI Food Black. Examples of the CI Direct Black include CI Direct Black 17, 19, 32, 51, 71, 108, 146, 154, and 168. Examples of the CI Direct Blue include CI Direct Blue 6, 22, 25, 71, 86, 90, 106, and 199. Examples of the CI Direct Red include CI Direct Red 1, 4, 17, 28, 83, and 227. Examples of the CI Direct Yellow include CI Direct Yellow 12, 24, 26, 86, 98, 132, 142, and 173. Examples of the CI Direct Orange include CI Direct Orange 34, 39, 44, 46, and 60. Examples of the CI Direct Violet include CI Direct Violet 47 and 48. Examples of the CI Direct Brown include CI Direct Brown 109. Examples of the CI Direct Green include CI Direct Green 59. Examples of the CI Acid Black include CI Acid Black 2, 7, 24, 26, 31, 52, 63, 112, and 118. Examples of the CI Acid Blue include CI Acid Blue 9, 22, 40, 59, 90, 93, 102, 104, 117, 120, 167, 229, and 234.Examples of the CI Acid Red include CI Acid Red 1, 6, 32, 37, 51, 52, 80, 85, 87, 92, 94, 115, 180, 256, 289, 315, and 317. Examples of the CI Acid Yellow include CI Acid Yellow 11, 17, 23, 25, 29, 42, 61, and 71. Examples of the CI Acid Orange include CI Acid Orange 7 and 19. Examples of the CI Acid Violet include CI Acid Violet 49. Examples of the CI Basic Black include CI Basic Black 2. Examples of the CI Basic Blue include CI Basic Blue 1, 3, 5, 7, 9, 24, 25, 26, 28, and 29. Examples of the CI Basic Red include CI Basic Red 1, 2, 9, 12, 13, 14, and 37. Examples of the CI Basic Violet include CI Basic Violet 7, 14, and 27. Examples of the CI Food Black include CI Food Black 1 and 2.

[0048] The dye may be one type of dye or two or more types of dyes.

[0049] The ink may further contain conventionally known additives as needed, such as the resin particles, organic solvent, water, crosslinking agent, surfactant, pH adjuster, viscosity adjuster, surface tension adjuster, and antifungal agent.

[0050] The adhesive liquid is, for example, different from the ink and is used for purposes other than those of the ink. As described above, the ink contains, for example, the coloring material and is used to color the image. The adhesive liquid is ejected onto the ink ejected onto the transfer medium and is used to adhere the print medium and the image.

[0051] Next, the image forming system of the present disclosure will be described. The image forming system of the present disclosure may be a system including an ink storage unit, an ink discharge unit, an adhesive liquid storage unit, an adhesive liquid discharge unit, a drying unit (drying device), and a contact heating unit (heat bonding device), which are separate and independent units, or may be an integrated system including the ink storage unit, the ink discharge unit, the adhesive liquid storage unit, the adhesive liquid discharge unit, the drying unit, and the contact heating unit within a single housing.

[0052] Fig. 1 shows the configuration of an example of an image forming system of the present disclosure. Fig. 2 is a plan view perspectively showing the internal structure of the image forming apparatus 1 shown in Fig. 1. In Fig. 1 and Fig. 2, which will be described later, the front, rear, left, and right are as indicated by arrows in Figs. 1 and 2. The directions relating to the front and rear are the sub-scanning direction (transfer medium conveyance direction), and the directions relating to the left and right are the main scanning direction (head movement direction).

[0053] As shown in FIG. 1 , the image forming system 100 includes an image forming apparatus 1 including a liquid storage unit 10, a control unit 30, an operation panel 40, and a discharge mechanism 60, a drying device 70, and a contact heating device 80. The image forming apparatus 1 also includes a discharge unit 20 inside its housing. The discharge mechanism 60 discharges a roll of transfer medium F having an ink-receiving layer in the sub-scanning direction. The roll of transfer medium F may be, for example, a roll of film having a length of several meters or more wound into a roll. However, the configuration of the transfer medium F is not limited thereto. For example, a cut film cut to a predetermined size, such as A4 size or A3 size, may also be used as the transfer medium F. The ink-receiving layer of the transfer medium F is not particularly limited and may be one commonly used in the technical field of the present disclosure.

[0054] The image forming apparatus 1 is an inkjet printing apparatus that ejects droplets of the ink and adhesive liquid from an ejection unit 20 onto a transfer medium F. The ejection unit 20 is an inkjet head of a line head type or a serial head type. In the image forming apparatus 1, the droplets are ejected onto the transfer medium F based on image data to form an image.

[0055] The ejection liquid storage section 10 can store the ejection liquid. Examples of the ejection liquid include the ink and the adhesive liquid. However, the ejection liquid storage section 10 includes an ink storage section that can store the ejection liquid of the ink and an adhesive liquid storage section that can store the ejection liquid of the adhesive liquid, each of which is a separate component.

[0056] 2, the image forming apparatus 1 includes, for example, a plurality of serial head type ejection units 20, a platen 22, a plurality of tanks 11, a conveying unit 51, and a scanning unit 52. The ejection units 20, the platen 22, the tanks 11, the conveying unit 51, and the scanning unit 52 are housed within the image forming apparatus 1.

[0057] The ejection unit 20 includes an ink ejection unit (first head) 20a and an adhesive liquid ejection unit (second head) 20b. The ink ejection unit 20a ejects the ink stored in the ink storage unit onto a transfer medium F having an ink-receiving layer by an inkjet method. The ink ejection unit 20a may include a color head that ejects color inks and a white head that ejects white ink onto the color inks. The adhesive liquid ejection unit 20b ejects the adhesive liquid stored in the adhesive liquid storage unit onto the ink on the transfer medium F by an inkjet method. However, the ejection unit 20 in the image forming apparatus 1 is not limited to one in which the ink is ejected from the ink ejection unit 20a and the adhesive liquid is ejected from the adhesive liquid ejection unit 20b. The ejection unit 20 in the image forming apparatus 1 may, for example, eject the ink from at least one nozzle provided in one head and eject the adhesive liquid from another nozzle, i.e., one ejection unit may eject both the ink and the adhesive liquid.

[0058] 2, for example, the ink discharge unit 20a located in the front of the image forming apparatus 1 is the color head, and the ink discharge unit 20a located in the rear of the image forming apparatus 1 is the white head. When the ink discharge unit 20a includes the white head, for example, the white head is arranged in the sub-scanning direction relative to the color heads. Furthermore, although the white head is arranged in the main scanning direction relative to the adhesive liquid discharge unit 20b, it may also be arranged in the sub-scanning direction relative to the adhesive liquid discharge unit 20b. Furthermore, the color heads may also be arranged in the sub-scanning direction relative to the white head and the adhesive liquid discharge unit 20b. Furthermore, the ink discharge unit 20a may also be arranged in the main scanning direction relative to the adhesive liquid discharge unit 20b. When the ink discharge unit 20a is arranged in the main scanning direction relative to the adhesive liquid discharge unit 20b, for example, the color head, the white head, and the adhesive liquid discharge unit 20b may all be arranged in the main scanning direction, or the color head may be arranged in the main scanning direction relative to the adhesive liquid discharge unit 20b, and the white head may be arranged in the sub-scanning direction relative to the color head and the adhesive liquid discharge unit 20b.

[0059] The platen 22 supports the transfer medium F. The platen 22 defines the distance between the transfer medium F placed on the upper surface of the platen 22 and the ejection unit 20 placed opposite the transfer medium F. The tanks 11 are containers that store the ink or the adhesive liquid, and the number of tanks 11 may be the same as the number of types of the ink and the adhesive liquid. For example, the tanks 11 may have a first tank 11a that stores each of the color inks and white ink as the ink, and a plurality of second tanks 11b that store the adhesive liquid.

[0060] Examples of the color ink include cyan ink, yellow ink, magenta ink, black ink, red ink, green ink, and blue ink. Examples of the white ink include white ink.

[0061] The first tank 11a stores the ink and is connected to the ink discharge unit 20a via a first flow path 12a. The ink is supplied from the first tank 11a to the ink discharge unit 20a via the first flow path 12a. The second tank 11b stores the adhesive liquid and is connected to the adhesive liquid discharge unit 20b via the second flow path 12b. The adhesive liquid is supplied from the second tank 11b to the adhesive liquid discharge unit 20b via the second flow path 12b. The first flow path 12a and the second flow path 12b are formed of, for example, rubber tubes or plastic tubes.

[0062] The transfer medium F discharged by the discharge mechanism 60 is transported, for example, backward in the sub-scanning direction by the transport unit 51. The transport unit 51 has, for example, two pairs of transport rollers 54, a pair of presser members 53, and a transport motor (not shown). One set of transport rollers 54 and the other set of transport rollers 54 are arranged to sandwich the platen 22 in the sub-scanning direction. The transport rollers 54 of each set are arranged to sandwich the transfer medium F. A transport motor is connected to one of the transport rollers 54 of each set. The transport motor drives the transport rollers 54 to rotate around their axes, thereby transporting the transfer medium F supported by the platen 22 backward in the sub-scanning direction. Note that the transfer medium F may also be transported forward in the sub-scanning direction. When discharging the transfer medium F forward, the discharge mechanism 60 may, for example, return the transfer medium F discharged by the discharge mechanism 60 to the forward direction in the sub-scanning direction.

[0063] The scanning unit 52 has, for example, a carriage 71, a pair of guide rails 72, a scanning motor 73, an endless belt 74, and a pulley 75. The pair of guide rails 72 extend along the main scanning direction above the platen 22. The carriage 71 supports the discharge unit 20 and is supported by the guide rails 72 so as to be movable in the main scanning direction. The endless belt 74 is connected to the carriage 71 while extending in the main scanning direction, and is also connected to the scanning motor 73 via the pulley 75. When the scanning motor 73 is driven, the endless belt 74 operates, causing the carriage 71 to move back and forth in the main scanning direction along the guide rails 72. Therefore, the discharge unit 20 supported by the carriage 71 can move back and forth in the main scanning direction.

[0064] As shown in FIG. 1, an operation panel 40 having buttons 41 and a display unit 42 is provided at the front right end of the image forming apparatus 1. The display unit 42 is, for example, a liquid crystal display. The buttons are used to input an image formation start signal to the control unit 30. In addition to or instead of the buttons, the display unit 42, which is, for example, a touch panel, may accept user input and input the image formation start signal to the control unit 30. A discharge mechanism 60 and an opening 50 through which the roll-shaped transfer medium F discharged from the discharge mechanism 60 enters and leaves the housing of the discharge unit 20 are provided on the front wall of the housing.

[0065] FIG. 3 is a block diagram showing a schematic configuration of an image forming system 100 according to the present disclosure. First, a layered liquid layer L1 made of the ink ejected from the ink ejection unit 20a is formed on the transfer medium F. Next, a layered liquid layer L2 made of the adhesive liquid ejected from the adhesive liquid ejection unit 20b is formed on the liquid layer L1. The liquid layers L1 and L2 are then dried by a drying device 70, forming an image on the transfer medium F. The drying device 70 performs the drying process by, for example, heat drying, air drying, or a combination of these. The drying process by the drying device 70 forms an image on the transfer medium F. The image is transferred to a print medium M by a contact heating device 80, forming an image on the print medium M. After the drying process, the contact heating device 80 applies heat and pressure to adhere the image formed by the ink to the print medium. Specifically, the contact heating device 80 applies heat and pressure to transfer the image S1 on the transfer medium F, to which the dried adhesive liquid (hereinafter sometimes referred to as "adhesive S2") has been applied, to the print medium M. To this end, the contact heating device 80 has, for example, a lower iron 101, an upper iron 102, and a heater mounted within the upper iron 102. The print medium M is placed on the lower iron 101, and the transfer medium F is placed at a desired position on the print medium M. At this time, the transfer medium F is placed with the main surface on which the image has been formed facing downward (i.e., the main surface faces the print medium M). An example of the contact heating device 80 is a heat press device. In this state, the upper iron 102 descends, and the print medium M and transfer medium F are sandwiched between the lower iron 101 and the upper iron 102. The heater is then driven to heat the print medium M and transfer medium F. This melts the adhesive S2, and the image S1 on the transfer medium F is transferred to the printing medium M. The printing medium M may be, for example, fabric or paper, and is particularly required to have washing fastness after image formation.

[0066] FIG. 4 is a block diagram showing an example of the configuration of a control unit of the image forming apparatus 1 of the present disclosure. In the control unit 30, a central processing unit (e.g., a CPU (Central Processing Unit)) 37, a ROM (Read Only Memory) 38, a RAM (Random Access Memory) 39, an input interface 35, and an output interface 30 are electrically connected via a bus 31. A button 41 and the like are electrically connected to the input interface 35. The output interface 42 is electrically connected to the ejection unit 20, a conveyance unit 51, a scanning unit 52, a display unit (display) 42, and the like via drive circuits 81 to 84, respectively.

[0067] The CPU 37 performs various calculations and processes based on signals input by the buttons 41 and various programs and data in the ROM 38 and RAM 39. Then, the CPU 37 transmits data and the like to each component of the discharge unit 20 via the output interface 36. The RAM 39 is a readable / writable volatile storage device, and stores various calculation results and the like from the CPU 37.

[0068] The control unit 30 causes the ink ejection unit 20a to eject the ink, and also causes the adhesive ejection unit 20b to eject the adhesive.

[0069] When the control unit 30 acquires information about the transfer medium F, the control unit 30 may control the timing of ejecting the ink and the adhesive liquid in accordance with the acquired information.

[0070] The ink and adhesive liquid are ejected onto the transfer medium F using the image forming apparatus 1 of the present disclosure, for example, as follows. First, the ink is applied (ejected) onto the transfer medium F from the ink ejection unit 20a. Specifically, while the platen 22 and the ejection unit 20 are transported by the transport unit 51 and the scanning unit 52, the ink ejection unit 20a prints an image using the ink at an image formation location on the transfer medium F. At least one of the ROM 38 and RAM 39 of the control unit 30 of the image forming apparatus 1 stores, for example, various image data created by software and various data for each type of transfer medium F. When an operator instructs printing, the image data is sent to the ink ejection unit 20a via the output interface 36, and the ink ejection unit 20a ejects the ink based on the image data to print onto the transfer medium F held on the platen 22. Furthermore, the adhesive liquid ejection unit 20b ejects the adhesive liquid onto the ink on the transfer medium F held on the platen 22 based on the image data.

[0071] The image forming apparatus 1 may further include a storage unit (not shown). The storage unit is a memory accessible from the control unit 30 and includes RAM and ROM. The RAM temporarily stores various data such as image data created by the control unit 30. The ROM stores an image forming program, a printing program, predetermined data, and the like. The image forming program may be downloaded, for example, via a predetermined communication network and stored in the storage unit. Alternatively, the image forming program stored in a storage medium such as a CD-ROM or USB flash memory may be stored in the storage unit via a reading unit.

[0072] The image forming apparatus 1 is provided with a communication interface (not shown), and receives image data transmitted from other apparatuses via the communication interface.

[0073] In this state, the upper iron 102 descends, and the printing medium M and the transfer medium F are sandwiched between the lower iron 101 and the upper iron 102. The heater is then driven to heat the printing medium M and the transfer medium F. This melts the adhesive S2, and the image S1 on the transfer medium F is transferred to the printing medium M.

[0074] Next, the image forming method of the present disclosure will be described with reference to Fig. 5. Fig. 5 is a flowchart showing an example of the steps in the image forming method of the present disclosure. As described above, the method includes an ink ejection step, an adhesive liquid ejection step, a drying step, and a contact heating step.

[0075] The ink ejection step (S11) includes a step of ejecting the ink onto the transfer medium by an inkjet method. The ink ejection step (S11) is performed by, for example, the ink ejection unit 20a described above.

[0076] The adhesive liquid ejection step (S12) includes ejecting the adhesive liquid onto the ink on the transfer medium by an inkjet method. The adhesive liquid ejection step (S12) is performed, for example, by the adhesive liquid ejection unit 20b described above. The amount of adhesive liquid ejected is not particularly limited, but for example, if the printing medium is a fabric or the like, it is an amount that can sufficiently fill in the unevenness of the fabric. By ejecting the adhesive liquid in an amount that can sufficiently fill in the unevenness of the fabric, transfer defects are less likely to occur when the transfer medium is peeled off.

[0077] The drying step (S13) includes a step of drying the transfer medium onto which the adhesive liquid has been ejected. The drying step (S13) is performed, for example, by the drying section (drying device) 70 described above. The drying temperature in the drying step (S13) may be, for example, 100°C or less, 80°C or less, or 60°C or less. The drying time in the drying step (S13) may be, for example, 3.5 minutes or less, or 2 minutes or less. By setting the drying temperature and drying time as described above, excessive progress of the crosslinking reaction between the crosslinking agent and the resin particles is suppressed.

[0078] The contact heating step (S14) includes a step of applying heat and pressure after the drying to adhere the image formed by the ink to the print medium. The contact heating step (S14) is performed, for example, by the aforementioned contact heating unit (contact heating device) 80. The heating temperature in the contact heating step (S14) may be changed appropriately depending on, for example, the type of print medium. If the print medium is a cotton fabric, the heating temperature may be, for example, 185°C or less. If the print medium is a polyester fabric, the heating temperature may be, for example, 130°C or less. Setting the heating temperature depending on the type of print medium can prevent heat damage to the fibers that make up the fabric and removal of the dye (sublimation transfer) that occurs due to the heating.

[0079] The image forming method of the present disclosure can be implemented using, for example, the image forming system described above. However, the image forming method of the present disclosure is not limited to use with the image forming system described above. [Example]

[0080] Next, examples of the present disclosure will be described together with comparative examples. Note that the present disclosure is not limited or restricted by the following examples and comparative examples.

[0081] [Examples 1 to 9 and Comparative Examples 1 to 5] The components in Tables 1 and 2 were charged into a stirring vessel while rotating a stirrer and mixed together to obtain adhesive solutions of Examples 1 to 9 and Comparative Examples 1 to 5 containing the components in Tables 1 and 2.

[0082] For the adhesive solutions of Examples 1 to 9 and Comparative Examples 1 to 5, (a) measurement of storage modulus E', (b) evaluation of transferability, and (c) evaluation of washing fastness were carried out by the following methods.

[0083] (a) Measurement of storage modulus E' The adhesive solution was dropped onto a Teflon (registered trademark) petri dish and dried in a thermostatic chamber at 100°C for 6 hours to obtain a coating with an average thickness of 0.4 mm. The obtained coating was further cut into a rectangular shape with a width of 10 mm to prepare a test piece for measuring the storage modulus E'.

[0084] The prepared test specimen was placed in a dynamic viscoelasticity measuring device (TA Instruments "RSA-G2") at 20°C and then cooled to -60°C. After reaching -60°C, the dynamic viscoelasticity was measured under the following measurement conditions. The obtained measurement data were recorded as "storage modulus E' at 110°C and "storage modulus E' at 25°C." Measurement temperature range: -60℃~180℃ Heating rate: 2.5℃ / min Frequency: 1Hz ·Initial strain: 0.1% Clamp distance: 10mm

[0085] (b) Transferability evaluation Using a printer (Brother Industries, Ltd., "GTX Pro B"), inks (Brother Industries, Ltd., "GCX-4C02-1, GCX-4M02-1, GCX-4Y02-1, GCX-4K02-1, GCX-4W02") and adhesive solutions of the Examples and Comparative Examples were ejected onto a transfer medium (Schultz, "DTF Premium Film") using a printer (Brother Industries, Ltd., "GTX Pro B"). After ejecting the ink and adhesive solution, the adhesive solution was dried so that its weight change rate X satisfied condition 1 (the aforementioned formula (1)) or condition 2 (the aforementioned formula (2)), yielding an intermediate transfer recording medium. The intermediate transfer recording medium was then heat-pressed onto a cotton T-shirt (COTTON HERITAGE, Inc., "MC1082") at 185°C, 65 psi, and 300 seconds. After the cotton T-shirt and transfer medium had sufficiently cooled, the transfer medium was peeled off, and the image was transferred onto the cotton T-shirt. The transfer state after peeling off the transfer medium was judged according to the following criteria to evaluate the transferability: The weight change rate X was calculated based on the following formula (3). X = (Wb - Wc) / (Wb - Wa) × 100 (3) In the formula (3), Wa is the weight of the transfer medium, Wb is the weight of the transfer medium to which the ink and adhesive liquid have been applied before drying, Wc is the weight of the transfer medium to which the ink and adhesive liquid have been applied and after drying.

[0086] Transferability evaluation Evaluation criteria A: The image was transferred from the transfer medium to the T-shirt, and there was no bleed-through to the back of the T-shirt. B: The image was transferred from the transfer medium to the T-shirt, but there was bleed-through to the back of the T-shirt. C: The image was not transferred from the transfer medium to the T-shirt, or the image was missing due to poor transfer.

[0087] (c) Washing fastness evaluation A washing test was conducted on a cotton T-shirt with an image transferred thereto in the same manner as in "(b) Transferability Evaluation." The washing test was conducted for one cycle in accordance with the American standard AATCC 61 II A method. The image after washing was evaluated for washing fastness according to the following criteria.

[0088] Washing fastness evaluation Evaluation criteria A: The image was not peeled off or cracked. B: The image was not peeled off, but it was cracked. C: The image is peeling or cracked.

[0089] The compositions of the adhesive solutions of Examples 1 to 9 and Comparative Examples 1 to 5 and the evaluation results are shown in Tables 1 and 2.

[0090] [Table 1] [Table 2]

[0091] As shown in Table 1, in Examples 1 to 9, the transferability was "B" when condition 1 was satisfied, and "A" when condition 2 was satisfied, which were good. The washing fastness was also good, being "B" or higher. Furthermore, the storage modulus E' at 25°C was 8.1 × 10 6 Under the condition of 0.1 Pa or less, all the washing fastnesses were rated "A", which was particularly good.

[0092] On the other hand, as shown in Table 2, in Comparative Examples 1 to 5, the transferability was rated "C" under both Condition 1 and Condition 2. Furthermore, the washing fastness was also rated "C" in all cases.

[0093] A part or all of the present disclosure may be described as, but is not limited to, the following supplementary notes. (Appendix 1) An adhesive liquid that is ejected from an ejection head onto ink on a transfer medium having an ink-receiving layer, and that adheres an image formed by the ink to the print medium by applying heat and pressure after drying, The composition includes water, resin particles, an organic solvent, a crosslinking agent, and a surfactant, The weight change rate X before and after drying satisfies the following formula (1) or the following formula (2), The storage modulus E' of the coating obtained by drying the adhesive solution at 110°C before the application of heat and pressure was 5.4 × 10 6 The adhesive solution has a viscosity of 0.05 Pa or less. X A≦X In the formulas (1) and (2), A is the weight ratio of the water to the total amount of the adhesive liquid, In the formula (2), B is the weight ratio of the water and the organic solvent to the total amount of the adhesive liquid. (Appendix 2) Attachment 1. The adhesive liquid according to claim 1, wherein the weight change rate X satisfies the formula (2). (Appendix 3) ​​The storage modulus E' at 25°C of the coating obtained by drying the adhesive liquid before the application of the heat and pressure was 8.1 × 10 6 3. The adhesive solution according to claim 1 or 2, wherein the viscosity of the adhesive solution is equal to or less than 1 Pa. (Appendix 4) an ink storage section; an ink ejection unit that ejects the ink stored in the ink storage unit onto a transfer medium by an inkjet method; an adhesive liquid storage section; an adhesive liquid ejection unit that ejects the adhesive liquid stored in the adhesive liquid storage unit onto the ink on the transfer medium by an inkjet method; a drying unit that dries the transfer medium onto which the adhesive liquid has been ejected; a contact heating section that applies heat and pressure to adhere the image formed by the ink to a print medium after the drying; Equipped with the adhesive liquid contains water, resin particles, an organic solvent, a crosslinking agent, and a surfactant; The weight change rate X before and after drying satisfies the following formula (1) or the following formula (2), The storage modulus E' of the coating obtained by drying the adhesive solution at 110°C before the application of heat and pressure was 5.4 × 10 6 An image forming system characterized in that the image forming speed is 100 kJ / s or less. X A≦X In the formulas (1) and (2), A is the weight ratio of the water to the total amount of the adhesive liquid, In the formula (2), B is the weight ratio of the water and the organic solvent to the total amount of the adhesive liquid. (Appendix 5) The method includes an ink ejection step, an adhesive liquid ejection step, a drying step, and a contact heating step, the ink ejection step includes a step of ejecting ink onto a transfer medium by an inkjet method; the adhesive liquid ejection step includes a step of ejecting adhesive liquid onto the ink on the transfer medium by an inkjet method;​​ the drying step includes a step of drying the transfer medium onto which the adhesive liquid has been ejected, the contact heating step includes applying heat and pressure to adhere the image formed by the ink to a print medium after the drying step; the adhesive liquid contains water, resin particles, an organic solvent, a crosslinking agent, and a surfactant; The weight change rate X before and after drying satisfies the following formula (1) or the following formula (2), The storage modulus E' of the coating obtained by drying the adhesive solution at 110°C before the application of heat and pressure was 5.4 × 10 6 10. An image forming method, characterized in that the pressure is 0.01 Pa or less. X A≦X In the formulas (1) and (2), A is the weight ratio of the water to the total amount of the adhesive liquid, In the formula (2), B is the weight ratio of the water and the organic solvent to the total amount of the adhesive liquid. [Industrial Applicability]

[0094] As described above, according to the adhesive liquid, image forming system, and image forming method of the present disclosure, even when an intermediate transfer recording medium is produced using the adhesive liquid, the transferability of the printing layer and the washing fastness of the printing medium after image transfer are good. [Explanation of symbols]

[0095] 100 Image forming system 1. Image forming device 10 Discharge liquid storage section 20 Discharge part 30 Control Unit 40 Operation Panel 50 Opening 60 Unloading mechanism F Transfer medium​​

Claims

1. An adhesive liquid that is ejected from an ejection head onto ink on a transfer medium having an ink-receiving layer, and that adheres an image formed by the ink to the print medium by applying heat and pressure after drying, The composition includes water, resin particles, an organic solvent, a crosslinking agent, and a surfactant, The weight change rate X before and after drying satisfies the following formula (1) or the following formula (2), The storage modulus E' at 110°C of the coating obtained by drying the adhesive liquid before the application of heat and pressure was 5.4 × 10 ６ The adhesive liquid has a viscosity of 0.05 Pa or less. X<A (1) A≦X<B (2) In the formulas (1) and (2), A is the weight ratio of the water to the total amount of the adhesive liquid, In the formula (2), B is the weight ratio of the water and the organic solvent to the total amount of the adhesive liquid.

2. The adhesive liquid according to claim 1 , wherein the weight change rate X satisfies the formula (2).

3. The storage modulus E' of the coating obtained by drying the adhesive liquid at 25°C before the application of heat and pressure was 8.1 × 10 ６ 3. The adhesive liquid according to claim 1, wherein the viscosity is 0.05 Pa or less.

4. an ink storage section; an ink ejection unit that ejects the ink stored in the ink storage unit onto a transfer medium by an inkjet method; an adhesive liquid storage section; an adhesive liquid ejection unit that ejects the adhesive liquid stored in the adhesive liquid storage unit onto the ink on the transfer medium by an inkjet method; a drying unit that dries the transfer medium onto which the adhesive liquid has been ejected; a contact heating section that applies heat and pressure to adhere the image formed by the ink to a print medium after the drying; Equipped with the adhesive liquid contains water, resin particles, an organic solvent, a crosslinking agent, and a surfactant; The weight change rate X before and after drying satisfies the following formula (1) or the following formula (2), The storage modulus E' at 110°C of the coating obtained by drying the adhesive liquid before the application of heat and pressure was 5.4 × 10 ６ An image forming system characterized in that the image forming speed is 100 kJ / s or less. X<A (1) A≦X<B (2) In the formulas (1) and (2), A is the weight ratio of the water to the total amount of the adhesive liquid, In the formula (2), B is the weight ratio of the water and the organic solvent to the total amount of the adhesive liquid.

5. The method includes an ink ejection step, an adhesive liquid ejection step, a drying step, and a contact heating step, the ink ejection step includes a step of ejecting ink onto a transfer medium by an inkjet method; the adhesive liquid ejection step includes a step of ejecting adhesive liquid onto the ink on the transfer medium by an inkjet method; the drying step includes a step of drying the transfer medium onto which the adhesive liquid has been ejected, the contact heating step includes applying heat and pressure to adhere the image formed by the ink to a print medium after the drying step; the adhesive liquid contains water, resin particles, an organic solvent, a crosslinking agent, and a surfactant; The weight change rate X before and after drying satisfies the following formula (1) or the following formula (2), The storage modulus E' at 110°C of the coating obtained by drying the adhesive liquid before the application of heat and pressure was 5.4 × 10 ６ 2. An image forming method, wherein the image forming temperature is 1000 Pa or less. X<A (1) A≦X<B (2) In the formulas (1) and (2), A is the weight ratio of the water to the total amount of the adhesive liquid, In the formula (2), B is the weight ratio of the water and the organic solvent to the total amount of the adhesive liquid.

Images