Treatment method

Abstract

The present application provides a treatment method capable of ensuring excellent continuous ejection stability while also achieving excellent rub fastness. One embodiment of the present application relates to a treatment method including: a first treatment agent attachment process in which a first treatment agent containing a pigment, first resin particles, water, and a first water-soluble organic solvent is ejected from an inkjet head and attached to a cloth; and a second treatment agent attachment process in which a second treatment agent containing second resin particles, water, and a second water-soluble organic solvent is sprayed from a nozzle tip port together with heated gas toward the cloth to which the first treatment agent is attached and is attached to the cloth, the temperature of the nozzle tip port being a temperature of 50°C or more higher than the normal boiling point of the second water-soluble organic solvent.

Description

TECHNICAL FIELD

[0001] The present application relates to a treatment method. BACKGROUND

[0002] An inkjet recording method can record a high-definition image with a relatively simple device, and has been rapidly developed in various aspects. Among them, various studies have been conducted on improving the rub fastness of a recording medium in recording using an ink containing a pigment. Although the rub fastness can be improved to some extent by increasing the content of a resin particle or the like in the ink, in this case, clogging of nozzles of an inkjet head is likely to occur, and it is thus difficult to ensure continuous ejection stability. Therefore, for example, a treatment method in which an image is formed by an inkjet recording method, and an overcoat liquid is applied thereon has been proposed.

[0003] For example, Patent Literature 1 discloses a method in which, after an ink is applied to paper by an inkjet method, an overcoat liquid is sprayed together with heated gas thereon.

[0004] Patent Literature 1: Japanese Patent Application Laid-Open No. 2020-175665

[0005] However, in an inkjet recording method, an image is also formed on a cloth as a recording medium. Therefore, it is required that the rub fastness, particularly wet rub fastness, on a cloth be excellent while ensuring excellent continuous ejection stability. SUMMARY

[0006] One aspect of the treatment method according to the present application includes:

[0007] a first treatment agent application step of applying a first treatment agent containing a pigment, a first resin particle, water, and a first water-soluble organic solvent from an inkjet head to a cloth; and

[0008] a second treatment agent application step of applying a second treatment agent containing a second resin particle, water, and a second water-soluble organic solvent to the cloth on which the first treatment agent is applied, together with heated gas from a nozzle tip port, and

[0009] The temperature of the nozzle tip port is a temperature of 50°C or higher than the normal boiling point of the second water-soluble organic solvent. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a schematic perspective view showing an inkjet recording device according to an embodiment.

[0011] EXPLANATION OF REFERENCE NUMERALS

[0012] 1: printer; 2: cloth; 3: inkjet head; 4: carriage; 5: main scanning mechanism; 6: platen roller; 7a, 7b, 7c, 7d, 7e, 7f: ink cartridge; 8: timing belt; 9: motor; 10: guide shaft. DETAILED DESCRIPTION

[0013] Hereinafter, embodiments of the present application will be described. The embodiments described below illustrate examples of the present application. The present application is not limited to any of the embodiments described below, and includes various modifications implemented within the scope of the present application without changing the gist of the present application. Note that the configurations described below are not necessarily all essential configurations of the present application.

[0014] 1. Processing method

[0015] The processing method according to an embodiment of the present application includes:

[0016] a first treatment agent application step of applying a first treatment agent containing a pigment, first resin particles, water, and a first water-soluble organic solvent to the cloth from an inkjet head; and

[0017] a second treatment agent application step of applying a second treatment agent containing second resin particles, water, and a second water-soluble organic solvent to the cloth on which the first treatment agent is applied, together with a heated gas from a nozzle tip port, and applying the second treatment agent to the cloth,

[0018] The temperature of the nozzle tip port is a temperature of 50°C or more higher than the normal boiling point of the second water-soluble organic solvent.

[0019] At present, it is known that the rub fastness of a cloth can be improved to some extent by increasing the content of components such as resin particles in ink. However, in this case, since the content of resin in the ink increases, the inkjet head is likely to be clogged, and it is difficult to ensure continuous ejection stability.

[0020] Therefore, a post-treatment of applying a treatment agent (overcoat liquid) containing components such as resin particles to the cloth on which the ink is applied is performed after the ink is applied to the cloth. By performing such a post-treatment, the rub fastness, which is insufficient when only the ink is present, can be improved, and thus the continuous ejection stability of the ink can be ensured. At this time, in order to stably and continuously eject even when components such as resin particles are contained in the overcoat liquid without causing clogging of the nozzle, a water-soluble organic solvent is sometimes contained for moisturizing. However, the water-soluble organic solvent contained for moisturizing is likely to remain on the cloth because of low volatility, and further, is likely to cause insufficient drying of the cloth. Due to the influence of such a water-soluble organic solvent remaining on the cloth, there is a defect that the rub fastness decreases. In addition, it is likely that the cloth is damaged by drying the cloth at a high temperature for a long time.

[0021] As a result of the deep research by the present inventors, it was found that by spraying the overcoat liquid together with a heating gas whose temperature is higher than the boiling point of the water-soluble organic solvent by a prescribed temperature or more, it is possible to ensure excellent continuous spraying stability while achieving excellent rub fastness. It is presumed that this is because the overcoat liquid is able to adhere to the cloth in a state where the water-soluble organic solvent has evaporated to some extent, and the effects of the present invention are not limited to this.

[0022] Next, each process included in the treatment method according to the present embodiment will be described.

[0023] 1.1 First treatment agent adhering process

[0024] The treatment method according to the present embodiment includes a first treatment agent adhering process in which a first treatment agent containing a pigment, first resin particles, water, and a first water-soluble organic solvent is sprayed from an inkjet head and adhered to a cloth.

[0025] Next, each component included in the first treatment agent will be described.

[0026] 1.1.1 First treatment agent

[0027] The first treatment agent contains at least a pigment, first resin particles, water, and a first water-soluble organic solvent. The first treatment agent has a function of forming an image on a cloth by adhering to the cloth, and corresponds to an inkjet ink composition.

[0028] 1.1.1.1 Pigment

[0029] The first treatment agent is a substance containing a pigment. As the pigment, for example, inorganic pigments, organic pigments can be used.

[0030] The inorganic pigment is not particularly limited, and examples include carbon black such as furnace black, lamp black, acetylene black, and channel black; and white inorganic oxides such as iron oxide, titanium oxide, zinc oxide, and silicon dioxide.

[0031] Examples of carbon black products include CI (Colour Index Generic Name) Pigment Black 1, 7, and 11. Commercially available carbon black products include: Mitsubishi Chemical's No. 2300, No. 900, MCF88, No. 33, No. 40, No. 45, No. 52, MA7, MA8, MA100, and No. 2200B; Columbia Carbon's Raven (registered trademark) 5750, 5250, 5000, 3500, 1255, and 700; CABOT's Regal (registered trademark) 400R, 330R, 660R, Mogul (registered trademark) L, and Monarch (registered trademark) 700, 800, 880, 900, 1000, 1100, 1300, and 1400; and Degussa's Color Black. FW1, FW2, FW2V, FW18, FW200, S150, S160, S170, Printex (registered trademark) 35, U, V, 140U, SpecialBlack 6, 5, 4A, 4, etc.

[0032] Examples of organic pigments include: quinacridone pigments, quinacridone quinone pigments, dioxazine pigments, phthalocyanine pigments, anthraquinone pigments, anthraquinone pigments, indigo anthraquinone pigments, flavanone pigments, perylene pigments, diketopyrrolopyrrole pigments, pyrene pigments, quinophthalone pigments, aminoanthraquinone pigments, thioindigo pigments, benzimidazolone pigments, isoindolinone pigments, azomethyl alkaloid pigments, or azo pigments, etc.

[0033] The following substances can be listed as specific examples of organic pigments.

[0034] Examples of cyan pigments include: CI Pigment Blue 1, 2, 3, 15:3, 15:4, 15:34, 16, 22, 60, etc.; CI Vat Blue 4, 60, etc. Preferably, one or more mixtures of the group consisting of CI Pigment Blue 15:3, 15:4 and 60 can be selected.

[0035] Examples of magenta pigments include CI Pigment Red 5, 7, 12, 48(Ca), 48(Mn), 57(Ca), 57:1, 112, 122, 123, 168, 184, 202, CI Pigment Violet 19, etc. Preferably, one or more mixtures of the group consisting of CI Pigment Red 122, 202 and 209, and CI Pigment Violet 19 can be selected.

[0036] As yellow pigments, C.I. Pigment Yellow 1, 2, 3, 12, 13, 14C, 16, 17, 73, 74, 75, 83, 93, 95, 97, 98, 119, 110, 114, 128, 129, 138, 150, 151, 154, 155, 180, 185, etc. can be exemplified, and preferably, one or a mixture of two or more selected from the group consisting of C.I. Pigment Yellow 74, 109, 110, 128, 138, 150, and 180 can be exemplified.

[0037] Pigments of other colors can also be used. For example, orange pigments, green pigments, etc. can be exemplified.

[0038] The pigments can be used singly or in combination of two or more.

[0039] It is to be noted that, in order to improve the dispersibility of the pigments in the first treatment agent, it is preferable to apply a surface treatment to the pigments or incorporate a dispersant, etc.

[0040] The surface treatment of the pigments refers to a treatment in which a functional group such as a carbonyl group, a carboxyl group, an aldehyde group, a hydroxyl group, a sulfone group, an ammonium group, and a salt thereof is directly or indirectly bonded to the surface of the pigments by physical or chemical treatment.

[0041] As the pigments to which the surface treatment is applied, carbon black is preferable from the viewpoint of more excellent jetting stability. The pigments to which the surface treatment is applied can be used as commercially available products, and for example, "Micro Jet CW1", "Micro Jet CW2" manufactured by Orient Chemical Industries, Ltd., "CAB-O-JET 200", "CAB-O-JET 300" manufactured by Cabot Corporation, etc. can be exemplified.

[0042] In the case where a dispersant is incorporated into the first treatment agent, it is preferable to use a dispersant having a hydrophobic portion (hydrophobic group) and a hydrophilic portion (hydrophilic group) in the molecular structure. Such a dispersant has an action in which the hydrophobic portion is adsorbed to the particle surface of the pigments and the hydrophilic portion is oriented toward the aqueous medium side of the first treatment agent. This action makes it possible to more stably contain the pigments as a dispersion in the first treatment agent.

[0043] Such a dispersant is not particularly limited, and for example, an acrylic resin, a styrene-(meth)acrylic acid copolymer, a styrene-(meth)acrylic acid-(meth)acrylate copolymer, a styrene-maleic acid resin, a salt thereof, a formalin condensate of an aromatic sulfonic acid salt, etc. can be exemplified, and one or more selected from the above group can be used. It is to be noted that the dispersant can be used as a commercially available product.

[0044] In addition, a method of imparting dispersibility by covering the pigment particles with a resin or the like can also be used. As a method of covering the pigment particles, acid separation, phase inversion emulsification, microemulsion polymerization, or the like can be used.

[0045] The content of the pigment can be appropriately adjusted depending on the use, and is preferably 0.1% by mass or more and 17.0% by mass or less, more preferably 0.2% by mass or more and 15.0% by mass or less, further preferably 1.0% by mass or more and 10.0% by mass or less, and particularly preferably 2.0% by mass or more and 5.0% by mass or less, relative to the total amount of the first treatment agent. If the content of the pigment is within the above range, there is a tendency that the continuous jetting stability is more excellent.

[0046] 1.1.1.2 First Resin Particles

[0047] The first treatment agent is a substance containing the first resin particles. The first resin particles can further improve the adhesion of the image caused by the pigment in the first treatment agent adhered to the cloth.

[0048] As the first resin particles, resin particles containing urethane resin, acrylic resin (including styrene acrylic resin), fluorene resin, polyolefin resin, rosin-modified resin, terpene resin, polyester resin, polyamide resin, epoxy resin, vinyl chloride resin, vinyl chloride-vinyl acetate copolymer, ethylene-vinyl acetate resin, and the like can be exemplified, and resin particles composed of one or two or more of these resins are preferable. These resin particles are often used in the form of an emulsion, but can also be supplied in the form of a powder.

[0049] The urethane resin refers to a general term for resins having urethane bonds. The urethane resin can use polyether urethane resin having ether bonds in the main chain in addition to urethane bonds, polyester urethane resin having ester bonds in the main chain, polycarbonate urethane resin having carbonate bonds in the main chain, and the like. In addition, commercially available products can be used as the urethane resin, and SUPERFLEX 460, 460s, 840, E-4000 (trade name, manufactured by the First Industrial Co., Ltd.), RESAMINE D-1060, D-2020, D-4080, D-4200, D-6300, D-6455 (trade name, manufactured by the Dai-Nippon Ink and Chemicals, Inc.), TAKELAC WS-6021, 6061, W-512-A-6 (trade name, manufactured by the Mitsui Chemicals Polyurethanes, Inc.), SUNCURE 2710 (trade name, manufactured by the Lubrizol Corporation), PERMARIN UA-150 (trade name, manufactured by the Sanyo Chemical Industries, Ltd.), and the like can be exemplified.

[0050] The acrylic resin is a general term for a polymer obtained by polymerizing at least a (meth)acrylic acid, a (meth)acrylic ester, or the like as a component, and examples thereof include a resin obtained from an acrylic monomer, a copolymer of an acrylic monomer and another monomer, and the like. Examples of the acrylic resin include an acrylic-vinyl resin as a copolymer of an acrylic monomer and a vinyl monomer, and the like. As the vinyl monomer, examples include styrene and the like.

[0051] As the acrylic monomer, acrylamide, acrylonitrile, or the like can also be used. The resin particles using the acrylic resin as a raw material can use a commercially available product, and examples thereof include FK-854 (trade name, manufactured by Central Glass Co., Ltd.), MOWINYL 952B, 718A (trade name, manufactured by Japan Coating Resin Co., Ltd.), Nipol LX852, LX874 (trade name, manufactured by Japan Zeon Co., Ltd.), and the like.

[0052] Note that, in the present specification, the acrylic resin can be a styrene-acrylic resin described later. In addition, in the present specification, the expression "(meth)acrylic acid" means at least one of acrylic acid and methacrylic acid.

[0053] The styrene-acrylic resin is a copolymer obtained from a styrene monomer and a (meth)acrylic monomer, and examples thereof include a styrene-acrylic copolymer, a styrene-methacrylic copolymer, a styrene-methacrylic-acrylate copolymer, a styrene-a-methylstyrene-acrylic copolymer, a styrene-a-methylstyrene-acrylic-acrylate copolymer, and the like. The styrene-acrylic resin can use a commercially available product, and examples thereof include JONCRYL 62J, 7100, 390, 711, 511, 7001, 632, 741, 450, 840, 74J, HRC-1645J, 734, 852, 7600, 775, 537J, 1535, PDX-7630A, 352J, 352D, PDX-7145, 538J, 7640, 7641, 631, 790, 780, 7610 (trade names, manufactured by BASF), MOWINYL 966A, 975N, 6960 (trade names, manufactured by Japan Coating Resin Co., Ltd.), VINYBLAN 2586 (manufactured by Nippon Shokubai Co., Ltd.), and the like.

[0054] The polyolefin resin is a substance having an olefin such as ethylene, propylene, or butene on a structural skeleton, and a publicly known substance can be appropriately selected. The polyolefin resin can use a commercially available product, and examples thereof include ARROWBASE CB-1200, CD-1200 (trade names, manufactured by UNITIKA Co., Ltd.), and the like.

[0055] The polyester-based resin refers to a resin such as polyethylene terephthalate (PET) obtained by dehydration condensation and polymerization of an alkylene glycol such as ethylene glycol and a polycarboxylic acid such as terephthalic acid, and is preferably a water-dispersible polyester resin. The resin particles of the polyester-based resin can use a commercially available product, and examples include VYLONAL MD-1200, 1500, 2000, 1480, 1985 (trade name, manufactured by Toyobo Co., Ltd.), and the like.

[0056] Note that, although the above lists commercially available products, the first resin particles can also be obtained by synthesis. The first resin particles can be used alone or in combination with two or more kinds.

[0057] From the viewpoint of improving the rubbing fastness, the first resin particles are preferably resin particles containing urethane resin, acrylic resin, or polyester-based resin. In particular, in the case where the first resin particles are particles containing urethane resin, there is a tendency to be able to further improve the rubbing fastness, and thus is preferable. In addition, in the case where the first resin particles contain urethane resin and the second resin particles contained in the second treating agent described later also contain urethane resin, the adhesion between the first treating agent and the second treating agent layer is improved because they are the same kind of resin, and thus the rubbing fastness can be further significantly improved.

[0058] The content of the first resin particles in the first treating agent is preferably 3.0 to 15.0% by mass, more preferably 4.0 to 12.0% by mass, further preferably 5.0 to 9.0% by mass, and particularly preferably 6.0 to 8.0% by mass, based on the total amount of the first treating agent in terms of solid content. When the first resin particles are within the above range, there is a tendency to be able to ensure excellent continuous jetting stability while having good rubbing fastness.

[0059] 1.1.1.3 Water

[0060] The first treating agent is a substance containing water.

[0061] The water is not particularly limited, and examples include pure water such as ion exchange water, ultrafiltration water, reverse osmosis water, and distilled water; and water such as ultrapure water from which ionic impurities are removed as much as possible. In addition, when water subjected to sterilization by irradiation of ultraviolet rays or addition of hydrogen peroxide or the like is used, in the case where the first treating agent is stored for a long period of time, it is possible to prevent the generation of fungi or bacteria. Thus, there is a tendency to be able to further improve the storage stability.

[0062] The content of water is preferably 50% by mass or more, more preferably 55% by mass or more, further preferably 60% by mass or more, particularly preferably 65% by mass or more, more particularly preferably 70% by mass or more, and particularly preferably 75% by mass or more, relative to the total amount of the first treatment agent. In addition, the upper limit of the content of water is not particularly limited, and is preferably 90% by mass or less, more preferably 80% by mass or less, relative to the total amount of the first treatment agent.

[0063] 1.1.1.4 First water-soluble organic solvent

[0064] The first treatment agent is a substance containing a first water-soluble organic solvent. As one of the functions of the first water-soluble organic solvent, it is possible to cite: improvement of the wettability of the first treatment agent to the cloth; and improvement of the moisture retention of the first treatment agent. In addition, the first water-soluble organic solvent can also function as a penetrant.

[0065] Note that, in the present specification, "water-soluble" means having a solubility of 0.1 g or more in, for example, 100 g of water at 20°C.

[0066] As the first water-soluble organic solvent, it is possible to cite: esters, alkylene glycol ether, cyclic esters, nitrogen-containing solvents, alcohols, polyhydric alcohols, and the like. As the nitrogen-containing solvents, it is possible to cite: cyclic amides, acyclic amides, and the like. As the acyclic amides, it is possible to cite: alkoxyalkyl amides, and the like.

[0067] As the esters, it is possible to cite: glycol monoacetates such as ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, diethylene glycol monomethyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, and dipropylene glycol monomethyl ether acetate; methoxybutyl acetate; diol diacetates such as ethylene glycol diacetate, diethylene glycol diacetate, propylene glycol diacetate, and dipropylene glycol diacetate; ethylene glycol acetopropionate, ethylene glycol acetobutyrate, diethylene glycol acetobutyrate, diethylene glycol acetopropionate, propylene glycol acetopropionate, propylene glycol acetobutyrate, and dipropylene glycol acetobutyrate.

[0068] As the alkylene glycol ether, only a mono- or di-ether of an alkylene glycol is necessary, and an alkyl ether is preferred. As specific examples, the following can be listed: ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, triethylene glycol monobutyl ether, tetraethylene glycol monomethyl ether, tetraethylene glycol monoethyl ether, tetraethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, tripropylene glycol monobutyl ether, and the like alkylene glycol monoalkyl ethers; and ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dibutyl ether, diethylene glycol methyl ethyl ether, diethylene glycol methyl butyl ether, triethylene glycol dimethyl ether, triethylene glycol diethyl ether, triethylene glycol dibutyl ether, triethylene glycol methyl butyl ether, tetraethylene glycol dimethyl ether, tetraethylene glycol diethyl ether, tetraethylene glycol dibutyl ether, propylene glycol dimethyl ether, propylene glycol diethyl ether, dipropylene glycol dimethyl ether, dipropylene glycol diethyl ether, tripropylene glycol dimethyl ether, and the like alkylene glycol dialkyl ethers.

[0069] Further, as the above alkylene glycol, the di-ether has a tendency to more easily dissolve or swell the first resin particles in the first treatment agent than the mono-ether, and can more improve the rub fastness of the formed image, and is therefore preferred.

[0070] As the cyclic ester, the following can be listed: β-propiolactone, γ-butyrolactone, δ-valerolactone, ε-hexanolactone, β-butyrolactone, β-valerolactone, γ-valerolactone, β-hexanolactone, γ-hexanolactone, δ-hexanolactone, β-heptanolactone, γ-heptanolactone, δ-heptanolactone, ε-heptanolactone, γ-octanolactone, δ-octanolactone, ε-octanolactone, δ-nonanolactone, ε-nonanolactone, ε-decanolactone, and the like cyclic esters (lactones), and compounds in which the hydrogen of the methylene adjacent to the carbonyl group of these is substituted with an alkyl group having 1 to 4 carbon atoms.

[0071] As the alkoxylalkylamide, for example, 3-methoxy-N,N-dimethylpropionamide, 3-methoxy-N,N-diethylpropionamide, 3-methoxy-N,N-methylethylpropionamide, 3-ethoxy-N,N-dimethylpropionamide, 3-ethoxy-N,N-diethylpropionamide, 3-ethoxy-N,N-methylethylpropionamide, 3-n-butoxy-N,N-dimethylpropionamide, 3-n-butoxy-N,N-diethylpropionamide, 3-n-butoxy-N,N-methylethylpropionamide, 3-n-propoxy-N,N-dimethylpropionamide, 3-n-propoxy-N,N-diethylpropionamide, 3-n-propoxy-N,N-methylethylpropionamide, 3-isopropoxy-N,N-dimethylpropionamide, 3-isopropoxy-N,N-diethylpropionamide, 3-isopropoxy-N,N-methylethylpropionamide, 3-t-butoxy-N,N-dimethylpropionamide, 3-t-butoxy-N,N-diethylpropionamide, 3-t-butoxy-N,N-methylethylpropionamide, and the like can be exemplified.

[0072] As the cyclic amide, lactam such as 2-pyrrolidone, 1-methyl-2-pyrrolidone, 1-ethyl-2-pyrrolidone, 1-propyl-2-pyrrolidone, 1-butyl-2-pyrrolidone, and the like pyrrolidones, and the like can be exemplified. Among these, in terms of promoting the coating of the resin particles, these substances are preferred, and particularly, 2-pyrrolidone is more preferred.

[0073] Further, as the alkoxylalkylamide, a compound represented by the following general formula (1) is also preferably used.

[0074] R 1 -O-CH2CH2-(C=O)-NR 2 R 3 …(1)

[0075] In the above formula (1), R 1 represents an alkyl group having 1 or more and 4 or less carbon atoms, R 2 and R 3 each independently represent a methyl group or an ethyl group. The "alkyl group having 1 or more and 4 or less carbon atoms" can be a linear or branched alkyl group, for example, a methyl group, an ethyl group, a n-propyl group, an isopropyl group, a n-butyl group, a sec-butyl group, an isobutyl group, a t-butyl group. The compound represented by the above formula (1) can be used singly or two or more kinds can be used in combination.

[0076] As the function of the compound represented by formula (1), for example, improvement of the surface dryness and fixing property of the first treating agent attached to the cloth can be exemplified.

[0077] Further, in the above formula (1), R 1 is more preferably a methyl group having 1 carbon atom. In the above formula (1), R 1The standard boiling point of methyl compounds and R 1 The standard boiling point of alkyl compounds with 2 or more but less than 4 carbon atoms is lower. Therefore, in the above formula (1), when using R... 1 When the compound is methyl, it may be able to further improve the surface dryness of the adhesion area (especially the surface dryness when recording in a high temperature and high humidity environment).

[0078] When using the compound represented by the above formula (1), the content of the compound relative to the total mass of the first processing agent is not particularly limited, and is about 5% by mass or more and 50% by mass or less, preferably 8% by mass or more and 48% by mass or less. By keeping the content of the compound represented by the above formula (1) within the above range, it may be possible to further improve the fixing properties and surface drying properties of the image (especially the surface drying properties when recording in a high temperature and high humidity environment).

[0079] Examples of alcohols include compounds in which one hydrogen atom of an alkane is replaced by a hydroxyl group. Preferably, the alkane has 10 or fewer carbon atoms, more preferably 6 or fewer, and even more preferably 3 or fewer. The alkane has 1 or more carbon atoms, preferably 2 or more. Alkanes can be straight-chain or branched-chain. Examples of alcohols include methanol, ethanol, n-propanol, isopropanol, n-butanol, 2-butanol, tert-butanol, isobutanol, n-pentanol, 2-pentanol, 3-pentanol, and tert-pentanol.

[0080] Polyols are alcohols that have two or more hydroxyl groups in their molecules. Polyols can be classified into, for example, alkyldiols and polyols.

[0081] Alkanediols refer to compounds in which, for example, alkanes are replaced by two hydroxyl groups. Examples of alkanediols include: ethylene glycol (also known as ethane-1,2-diol), propylene glycol (also known as propane-1,2-diol, standard boiling point 189°C), 1,2-butanediol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, 1,3-propanediol, 1,3-butanediol (also known as 1,3-butanediol), 1,4-butanediol, 2,3-butanediol, and 1,2-pentanediol. Alcohols, 1,5-pentanediol, 2,4-pentanediol, 2-methyl-1,3-propanediol, 3-methyl-1,3-butanediol, 3-methyl-1,5-pentanediol, 2-ethyl-1,3-hexanediol, 2-methyl-1,3-pentanediol, 3-methyl-1,5-pentanediol, 2-methylpentane-2,4-diol, 1,6-hexanediol, 2-ethyl-2-methyl-1,3-propanediol, 2-methyl-2-propyl-1,3-propanediol, etc.

[0082] As the polyhydric alcohol, there can be mentioned, for example, a condensate of 2 or more hydroxyl groups of an alkylene glycol which are condensed with each other intermolecularly, a compound having 3 or more hydroxyl groups, and the like.

[0083] As the condensate of 2 or more hydroxyl groups of an alkylene glycol which are condensed with each other intermolecularly, there can be mentioned, for example, diethylene glycol (standard boiling point 245°C), dipropylene glycol, and the like, triethylene glycol (standard boiling point 287°C), tripropylene glycol, and the like, and the like.

[0084] The compound having 3 or more hydroxyl groups is a compound having 3 or more hydroxyl groups with an alkane and a polyether structure as a skeleton. As the compound having 3 or more hydroxyl groups, there can be mentioned, for example, glycerin (standard boiling point 290°C), trimethylol ethane, trimethylol propane, 1,2,5-hexanetriol, 1,2,6-hexanetriol, pentaerythritol, polyoxypropylene triol, and the like.

[0085] The alkylene glycol and the polyhydric alcohol can function mainly as a penetration solvent and / or a moisturizing solvent. Note that the alkylene glycol has a strong tendency to have the property of a penetration solvent, and the polyhydric alcohol has a strong tendency to have the property of a moisturizing solvent.

[0086] The first water-soluble organic solvent can be used singly or in combination of two or more.

[0087] The content of the first water-soluble organic solvent is preferably 2 to 20% by mass, more preferably 4 to 18% by mass, further preferably 5 to 16% by mass, particularly preferably 7 to 14% by mass, and more particularly preferably 8 to 12% by mass, relative to the total amount of the first treatment agent. When the content of the first water-soluble organic solvent is within the above range, there is a tendency that the rubbing fastness and the continuous ejection stability can be improved in balance.

[0088] In addition, it is also preferable that the content of a solvent having a standard boiling point of 180°C or higher, preferably 220°C or higher, more preferably 260°C or higher, and further preferably 280°C or higher, in the first water-soluble organic solvent is within the above range. When the content of the first water-soluble organic solvent having a standard boiling point of a specific value or higher is within the above range, there is a tendency that the balance between the moisturizing property and the dryness is more excellent, and the rubbing fastness and the continuous ejection stability are more excellent. Note that the solvent having a standard boiling point of 180°C or higher is described later.

[0089] 1.1.1.5 Surfactants

[0090] The first treating agent can further contain a surfactant. The surfactant has a function of reducing the surface tension of the first treating agent to improve the penetration into the cloth. As the surfactant, at least one of a nonionic surfactant, an anionic surfactant, a cationic surfactant, and an amphoteric surfactant can be used.

[0091] As the nonionic surfactant, an acetylene glycol surfactant, a fluorine surfactant, a silicone surfactant, or the like can be used. By using these surfactants, there is a tendency that the wettability to the cloth can be improved with a small content. Note that, as the acetylene glycol surfactant, for example, OLFINE E1010 (Nisshin Chemical Co., Ltd.) or the like can be used.

[0092] In the case where the first treating agent contains the surfactant, the content of the surfactant with respect to the total amount of the first treating agent is preferably 0.01 to 1.0% by mass, more preferably 0.05 to 0.8% by mass, further preferably 0.1 to 0.6% by mass, particularly preferably 0.15 to 0.5% by mass, and more particularly preferably 0.2 to 0.4% by mass. When the content of the surfactant is within the above range, the continuous discharge stability can be more excellent.

[0093] 1.1.1.6 pH adjustor

[0094] The first treating agent can further contain a pH adjustor. As the pH adjustor, there is no particular limitation, and for example, an organic base, an inorganic base can be used. As the organic base, for example, an alkanolamine such as triethanolamine, diethanolamine, monoethanolamine, triisopropanolamine, or the like can be used. As the inorganic base, a strong base such as lithium hydroxide, potassium hydroxide, calcium hydroxide, or the like can be used as a hydroxide of an alkali metal or an alkaline earth metal.

[0095] In the case where the first treating agent contains the pH adjustor, the content of the pH adjustor with respect to the total amount of the first treating agent is preferably 0.01 to 1.0% by mass, more preferably 0.03 to 0.5% by mass, further preferably 0.05 to 0.3% by mass, and particularly preferably 0.07 to 0.15% by mass. When the content of the pH adjustor is within the above range, the dispersion stability of the pigment can be improved, and the continuous discharge stability can be more excellent.

[0096] 1.1.1.7 Other components

[0097] The first treating agent can further contain, as needed, a preservative and a mildew preventive agent, a rust preventive agent, a chelating agent, a viscosity modifier, an antioxidant, an antifungal agent, or the like.

[0098] 1.1.2 Cloth

[0099] As the form of the cloth used in the processing method according to the present embodiment, for example, cloth, clothes, and other apparel can be given. The cloth includes woven fabric, knitted fabric, nonwoven fabric, and the like. The clothes and other apparel include sewn T-shirts, handkerchiefs, scarves, towels, handbags, cloth bags, curtains, bed sheets, bed covers, wallpaper, and the like, which are furniture, and cloth before and after cutting, which is a component before sewing. As the form thereof, for example, a long object wound in a roll shape, an object cut to a predetermined size, an object in a product shape, and the like can be given.

[0100] The material constituting the cloth is not particularly limited, and for example, natural fibers such as cotton, hemp, wool, silk, synthetic fibers such as polypropylene, polyester, acetate, triacetate, polyamide (for example, nylon), polyurethane, and degradable fibers such as polylactic acid, and the like, and a blend of these can be given. For example, as the polyester cloth, a cloth formed of a polyester fiber monomer (polyester) or a blend of polyester and cotton is preferable, and as the nylon cloth, a cloth formed of a nylon fiber monomer (nylon) or a blend of nylon and cotton is preferable.

[0101] The polyester fiber is, for example, a fiber synthesized by dehydration condensation of a polyhydric alcohol and a polycarboxylic acid. As the polyhydric alcohol, an alkylene glycol is preferable, and specifically, for example, ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,4-cyclohexanedimethanol, and the like can be given. As the polycarboxylic acid, for example, terephthalic acid, 2,6-naphthalene dicarboxylic acid, and the like can be given. As the polyester fiber, for example, polyethylene terephthalate (condensation of terephthalic acid and ethylene glycol), polytrimethylene terephthalate (condensation of terephthalic acid and 1,3-propanediol), polybutylene terephthalate (condensation of terephthalic acid and 1,4-butanediol), polyethylene naphthalate (condensation of 2,6-naphthalene dicarboxylic acid and ethylene glycol), polybutylene naphthalate (condensation of 2,6-naphthalene dicarboxylic acid and 1,4-butanediol), and the like can be given.

[0102] The nylon fiber has a fiber of n-nylon synthesized by ring-opening polymerization of a cyclic lactam and a fiber of n,m-nylon synthesized by polycondensation of a dicarboxylic acid and a diamine. As the fiber of n-nylon, for example, nylon 6 (ε-caprolactam ring-opening polymerization), nylon 11 (undecanolactam ring-opening polymerization), nylon 12 (dodecanolactam ring-opening polymerization), and the like can be given. As the fiber of n,m-nylon, for example, nylon 66 (condensation of adipic acid and hexamethylene diamine), nylon 610 (condensation of sebacic acid and hexamethylene diamine), nylon 6T (condensation of terephthalic acid and hexamethylene diamine), nylon 6I (condensation of isophthalic acid and hexamethylene diamine), nylon 9T (condensation of terephthalic acid and nonanediamine), nylon M5T (condensation of terephthalic acid and methylpentanediamine), and the like can be given.

[0103] From the viewpoint of making the effects of the present application more remarkable, the cloth is preferably any one selected from the group consisting of polyester and nylon. Cloth selected from this material is damaged by heat and cannot be dried for a long time at high temperature. However, according to the treatment method according to the present embodiment, the second treatment agent is sprayed together with the heated gas, so the volatilization of the volatile component is easily promoted. Therefore, even if high-temperature long-time heating is not applied, sufficient drying can be performed, and even for the above cloth, the rubbing fastness can be made good while reducing damage caused by heat.

[0104] The cloth preferably has a grammage of 1.0 oz or more and 10.0 oz or less, more preferably 2.0 oz or more and 9.0 oz or less, further preferably 3.0 oz or more and 8.0 oz or less, further more preferably 4.0 oz or more and 7.0 oz or less.

[0105] 1.1.3 Attachment method

[0106] The first treatment agent attachment step is a step of spraying the above first treatment agent from an inkjet head and attaching it to the cloth.

[0107] 1.1.3.1 Recording device

[0108] Here, with reference to Figure 1 , an inkjet recording device provided with an inkjet head that can be used in the first treatment agent attachment step will be described. The inkjet recording device is a device that performs recording by dropping droplets of an ink composition (first treatment agent) on a recording medium such as a cloth by an inkjet method. Figure 1 is a schematic perspective view showing an inkjet recording device used in the first treatment agent attachment step according to the present embodiment. In the present embodiment, as the inkjet recording device, a printer of a carriage type in which ink cartridges are mounted on a carriage will be described. Note that, Figure 1 In, each component is made to be recognizable in size, and thus the dimensions of each component are different from actual dimensions.

[0109] The printer 1 of the present embodiment is a printer called a so-called serial printer. The serial printer refers to a printer in which an inkjet head is mounted on a carriage that moves in a prescribed direction, and the inkjet head performs printing while moving with the movement of the carriage.

[0110] As shown in Figure 1 , the printer 1 has an inkjet head 3, a carriage 4, a main scanning mechanism 5, a platen roller 6, and a control section (not shown) that controls the operation of the entire printer 1. The carriage 4 mounts the inkjet head 3, and is detachably housed ink cartridges 7a, 7b, 7c, 7d, 7e, 7f that supply an ink composition to the inkjet head 3.

[0111] The main scanning mechanism 5 has a timing belt 8 connected to the carriage 4, a motor 9 that drives the timing belt 8, and a guide shaft 10. The guide shaft 10 is provided as a support member of the carriage 4 along a scanning direction (main scanning direction) of the carriage 4. The carriage 4 is driven by the motor 9 via the timing belt 8 and is movable back and forth along the guide shaft 10. Thus, the main scanning mechanism 5 has a function of moving the carriage 4 back and forth along the main scanning direction.

[0112] The platen roller 6 has a function of conveying the recording fabric 2 along a sub scanning direction (length direction of the recording fabric 2) orthogonal to the above-described main scanning direction. Thus, the recording fabric 2 is conveyed along the sub scanning direction. In addition, the carriage 4 on which the inkjet head 3 is mounted is movable back and forth along the main scanning direction substantially coinciding with the width direction of the recording fabric 2, and the inkjet head 3 can relatively scan the recording fabric 2 in the main scanning direction and the sub scanning direction.

[0113] The ink cartridges 7a, 7b, 7c, 7d, 7e, 7f are six independent ink cartridges. The ink cartridges 7a, 7b, 7c, 7d, 7e, 7f can accommodate the first treating agent of the present embodiment. The first treating agents of the respective ink cartridges show colors of black, cyan, magenta, yellow, white, orange, and the like, and can be used in any combination. Although Figure 1 The number of ink cartridges is six, but is not limited thereto. The bottom of each of the ink cartridges 7a, 7b, 7c, 7d, 7e, 7f is provided with a supply port (not shown) for supplying the first treating agent accommodated in each ink cartridge to the inkjet head 3.

[0114] The inkjet head 3 has a nozzle face (not shown) on a face opposite to the recording fabric 2. Nozzle rows (not shown) each composed of a plurality of nozzles (not shown) are arranged on the nozzle face in correspondence with the respective colors of the first treating agent. The first treating agent of each color is supplied from each ink cartridge to the inkjet head 3 and is ejected from the nozzles as droplets by actuators (not shown) in the inkjet head 3. The droplets of the first treating agent after ejection fall on the recording fabric 2 and form images, texts, patterns, colors, and the like on the recording region of the recording fabric 2.

[0115] Here, a piezoelectric element is used as the actuator (driving device) in the inkjet head 3, but the form is not limited thereto. For example, an electromechanical conversion element that causes a vibration plate as the actuator to displace by electrostatic adsorption, or an electrothermal conversion element that causes the first treating agent to be ejected as droplets by a bubble generated by heating can be used.

[0116] Note that, although the printer 1 of the carriage type is exemplified as the inkjet recording apparatus in the present embodiment, the present application is not limited thereto. For example, a printer of the carriage-less type in which an ink container such as an ink cartridge is not mounted on a carriage can also be used. In addition, the inkjet recording apparatus used in the present application is not limited to the serial printer described above, and a line head printer in which an inkjet head is formed to be equal to or wider than the width of the cloth 2 so that recording is performed without moving the inkjet head can also be used.

[0117] 1.1.3.2 Attachment conditions and the like

[0118] In the first treatment agent attachment process, the maximum amount of the first treatment agent that can be attached to the cloth can be 1 mg / cm 2 200 mg / cm 2 Hereinafter, 1 mg / cm 2 30 mg / cm 2 Hereinafter, further preferably 2 mg / cm 2 25 mg / cm 2 More preferably, 5 mg / cm 2 20 mg / cm 2 Particularly preferably, 7 mg / cm 2 15 mg / cm 2 Hereinafter. In such a case, the color development of the recorded image is good, and the drying property of the recorded image is good, and the bleeding of the image can be suppressed, and in addition, it is possible to record an image such as a picture and a character on the cloth with good reproducibility, and thus it is preferable.

[0119] 1.2 Second treatment agent attachment process

[0120] The treatment method according to the present embodiment includes a second treatment agent attachment process in which a second treatment agent containing second resin particles, water, and a second water-soluble organic solvent is sprayed from a nozzle tip port together with a heated gas toward the cloth to which the first treatment agent is attached, and is attached to the cloth, the temperature of the nozzle tip port being a temperature of 50°C or more higher than the normal boiling point of the second water-soluble organic solvent.

[0121] Next, each component contained in the second treatment agent will be described.

[0122] 1.2.1 Second treatment agent

[0123] The second treatment agent contains at least the second resin particles, water, and the second water-soluble organic solvent. The second treatment agent is attached to the cloth to which the first treatment agent is attached, and corresponds to a so-called post-treatment liquid or an outer coating liquid.

[0124] 1.2.1.1 Second resin particles

[0125] The second treatment agent contains second resin particles. The second resin particles have a function of significantly improving rubbing fastness by being attached to the cloth. The same substance as the first resin particles described above can be used as the second resin particles. In addition, the second resin particles and the first resin particles can be the same or different.

[0126] From the viewpoint of improving rubbing fastness, the second resin particles are preferably resin particles containing urethane resin, acrylic resin, and polyester resin. In particular, in the case where the second resin particles are particles containing urethane resin, there is a tendency that rubbing fastness can be further improved, and thus the second resin particles are preferred. In addition, in the case where the second resin particles contain urethane resin and the first resin particles contained in the first treatment agent described above also contain urethane resin, the adhesion between the first treatment agent and the second treatment agent layer is improved because the same kind of resin is used, and further, rubbing fastness can be more significantly improved.

[0127] As the content of the second resin particles in the second treatment agent, the content of the second resin particles is preferably 3.0 to 20.0% by mass, more preferably 6.0 to 15.0% by mass, further preferably 7.0 to 14.0% by mass, particularly preferably 8.0 to 12.0% by mass, and more particularly preferably 9.0 to 11.0% by mass, based on the total amount of the second treatment agent in terms of solid content. When the second resin particles are within the above range, particularly 6.0 to 15.0% by mass, there is a tendency that rubbing fastness can be further improved while ensuring good continuous jetting stability.

[0128] In addition, the lower limit value of the content of the second resin particles in the second treatment agent is preferably 3.0% by mass or more, more preferably 6.0% by mass or more, further preferably 7.0% by mass or more, particularly preferably 8.0% by mass or more, and more particularly preferably 9.0% by mass or more, based on the total amount of the second treatment agent in terms of solid content, from the viewpoint of being able to further improve rubbing fastness. The upper limit value of the content of the second resin particles in the second treatment agent is preferably 20.0% by mass or less, more preferably 15.0% by mass or less, further preferably 14.0% by mass or less, particularly preferably 12.0% by mass or less, and more particularly preferably 11.0% by mass or less, based on the total amount of the second treatment agent in terms of solid content, from the viewpoint of being able to ensure good continuous jetting stability.

[0129] The content of the second resin particles with respect to the total amount of the second treatment agent is preferably the same as or more than the content of the first resin particles with respect to the total amount of the first treatment agent. In the case where there is such a correlation, there is a tendency that rubbing fastness can be further improved while maintaining good continuous jetting stability in both the first treatment agent and the second treatment agent.

[0130] The content of the second resin particles with respect to the total amount of the second treatment agent is preferably more than 1.0 mass% more than the content of the first resin particles with respect to the total amount of the first treatment agent, more preferably more than 2.0 mass%, further preferably more than 3.0 mass%. On the other hand, the content of the second resin particles with respect to the total amount of the second treatment agent is preferably 8.0 mass% or less, more preferably 6.0 mass% or less, further preferably 4.0 mass% or less, more than the content of the first resin particles with respect to the total amount of the first treatment agent. In the presence of such a correlation, both the first treatment agent and the second treatment agent have a tendency to make the friction fastness even better while ensuring good continuous jetting stability.

[0131] 1.2.1.2 Water

[0132] The second treatment agent contains water. The water used for the second treatment agent is the same as the first treatment agent described above.

[0133] The content of the water is preferably 55 mass% or more, more preferably 60 mass% or more, further preferably 65 mass% or more, particularly preferably 70 mass% or more, more particularly preferably 75 mass% or more, further particularly preferably 80 mass% or more, with respect to the total amount of the second treatment agent. In addition, the upper limit of the content of the water is not particularly limited, and is preferably 95 mass% or less, more preferably 90 mass% or less, with respect to the total amount of the second treatment agent.

[0134] 1.2.1.3 Second water-soluble organic solvent

[0135] The second treatment agent is a substance containing a second water-soluble organic solvent. As the function of the second water-soluble organic solvent, for example, it can be cited that it can improve the moisture retention of the second treatment agent, and make the continuous jetting stability good. The second water-soluble organic solvent can use the same substance as the first water-soluble organic solvent described above, and one kind alone or two or more kinds in combination can be used. In addition, the second water-soluble organic solvent and the first water-soluble organic solvent can be the same or different.

[0136] The second treatment agent preferably contains a solvent having an SP value of 9.0 to 11.0 in the second water-soluble organic solvent, more preferably a solvent having an SP value of 9.2 to 10.8, further preferably a solvent having an SP value of 9.4 to 10.6, particularly preferably a solvent having an SP value of 9.5 to 10.4. In the treatment method according to the present embodiment, since the second treatment agent is sprayed together with the heated gas, when the second treatment agent adheres to the cloth, the volatile component can be reduced, and the wettability can be lowered. Even in such a case, by containing a solvent having an SP value in the above range, the second treatment agent has a tendency to make the wettability to the coated surface good, and be able to be uniformly coated even with a small amount of coating.

[0137] Here, solubility parameters (SP values) are explained. The SP values in the present application are SP values based on the Hansen method. The Hansen method classifies SP values δ into three terms and is shown as δ = δd + δp + δh 2 2 2 2 wherein δd, δp, δh are solubility parameters corresponding to dispersion, dipole, and hydrogen bonding terms, respectively.

[0138] In addition, the unit of the SP value is (cal / cm 3 ) 1 / 2 The SP value is based on the insight that "two substances similar in their intermolecular interactions will readily dissolve in each other," and is a value proposed by Mr. Hansen (also referred to as HSP). In addition to being able to be predicted by calculation, it can also be obtained by experiment or experience, and various documents describe this value. In the present embodiment, the SP value can use a value derived using the calculation software Hansen-Solubility HSPiP.

[0139] ​​​The following second water-soluble organic solvents are provided as examples, but are not limited thereto. Methanol (SP value: 14.84), ethanol (SP value: 11.8), 2-propanol (SP value: 12.7), n-propanol (SP value: 11.8), 1,3-butanediol (SP value: 14.47), 1,4-butanediol (SP value: 12.1), 1,2-hexanediol (SP value: 12.2), 2-methyl-1,3-pentanediol (SP value: 10.3), butoxypropanol (SP value: 8.9), dipropylene glycol (SP value: 12.9), triethylene glycol (SP value: 13.8), 2-ethyl-1,3-hexanediol (SP value: 11.6), tetraethylene glycol (SP value: 12.6), glycerol (SP value: 16.5), hexane (SP value: 7.45), cyclohexane (SP value: 8.40), 3,5,5-trimethyl-2-cyclohexen-1-one (SP value: 8.87), xylene (SP value: 8.95), ethylbenzene (SP value: 8.93), γ-butyrolactone (SP value: 14.8), 2-pyrrolidone (γ-butyrolactam) (SP value: 14.2), butyl acetate (SP value: 8.70), ethyl octanoate (SP value: 8.3), 3-methoxybutyl acetate (SP value: 8.71), oleic acid (SP value: 8.69), dodecyl acrylate (SP value: 8.63), diethyl ether (SP value: 7.82), ethyl propyl ether (SP value: 8.8), ethylene glycol monomethyl ether (SP value: 11.4), ethylene glycol mono-isopropyl ether (SP value: 9.2), ethylene glycol monobutyl ether (SP value: 9.8), ethylene glycol diethyl ether (SP value: 8.6), diethylene glycol monomethyl ether (SP value: 10.7), diethylene glycol monobutyl ether (SP value: 9.5), diethylene glycol monoisobutyl ether (SP value: 8.7), diethylene glycol dimethyl ether (SP value: 9.4), diethylene glycol ethyl methyl ether (SP value: 8.3), diethylene glycol diethyl ether (SP value: 8.1), diethylene glycol isopropyl methyl ether (SP value: 7.9), diethylene glycol butyl methyl ether (SP value: 8.1), diethylene glycol dibutyl ether (SP value: 7.7), propylene glycol monomethyl ether (SP value: 10.4), propylene glycol n-propyl ether (SP value 9.8), propylene glycol n-butyl ether (SP value: 9.7), propylene glycol monophenyl ether (SP value: 9.4), dipropylene glycol monomethyl ether (SP value: 9.6), dipropylene glycol monoethyl ether (SP value: 10.9), dipropylene glycol n-propyl ether (SP value: 9.5), dipropylene glycol n-butyl ether (SP value: 9.4), dipropylene glycol dimethyl ether (SP value: 7.88), triethylene glycol monomethyl ether (SP value: 10.5), triethylene glycol monobutyl ether (SP value: 10.0), triethylene glycol dimethyl ether (SP value: 8.7), triethylene glycol butyl methyl ether (SP value: 8.0), tripropylene glycol monomethyl ether (SP value: 9.1), tripropylene glycol n-butyl ether (SP value: 9.3), tripropylene glycol dimethyl ether (SP value: 7.4) tetraethylene glycol dimethyl ether (SP value: 8.7), ethylene glycol monomethyl ether acetate (SP value: 8.96), ethylene glycol monoethyl ether acetate (SP value: 8.91), ethylene glycol monobutyl ether acetate (SP value: 8.85), diethylene glycol monobutyl ether acetate (SP value: 8.94), dipropylene glycol monomethyl ether acetate (SP value: 8.6).

[0140] Of the solvents in the above examples, any one or more of diethylene glycol monobutyl ether (SP value: 9.5), 2-methyl-l,3-pentanediol (SP value: 10.3) are more preferable, and have a more excellent balance of moisturizing property and dryness, and a tendency to have more excellent rubbing fastness and continuous ejection stability.

[0141] The content of the second water-soluble organic solvent with respect to the total amount of the second treatment agent is preferably 1.0% by mass or more, more preferably 3.0% by mass or more, further preferably 5.0% by mass or more, and particularly preferably 7.0% by mass or more. The upper limit is not particularly limited, and is preferably 20.0% by mass or less, more preferably 15.0% by mass or less, further preferably 13.0% by mass or less, and particularly preferably 10.0% by mass or less. When the content of the second water-soluble organic solvent is within the above range, particularly 5.0% by mass or more, there is a tendency to be able to improve the rubbing fastness and the continuous ejection stability in balance.

[0142] In addition, it is preferable to make the content of a solvent having a standard boiling point of 180°C or more within the above range. The upper limit of the standard boiling point is not particularly limited, and is preferably 300°C or less, more preferably 270°C or less, further preferably 240°C or less, particularly preferably 210°C or less, more particularly preferably 190°C or less. In addition, the lower limit of the standard boiling point can be 220°C or more, 260°C or more, or 280°C or more. When the content of the second water-soluble organic solvent having a standard boiling point of a specific value or more is within the above range, particularly when the content of a solvent having a standard boiling point of 180°C or more in the second water-soluble organic solvent is 5.0% by mass or more with respect to the total amount of the second treatment agent, there is a tendency to have a more excellent balance of moisturizing property and dryness, and more excellent rubbing fastness and continuous ejection stability.

[0143] As the solvent having a standard boiling point of 180°C or higher, for example, 1,2-butanediol (194°C), propylene glycol (189°C), 1,2-pentanediol (210°C), 1,2-hexanediol (224°C), 1,2-heptanediol (227°C), 1,3-propanediol (210°C), 1,3-butanediol (230°C), 1,4-butanediol (230°C), 1,5-pentanediol (242°C), 1,6-hexanediol (250°C), 2-ethyl-2-methyl-1,3-propanediol (226°C), 2-methyl-2-propyl-1,3-propanediol (230°C), 2-methyl-1,3-propanediol (214°C), 2,2-dimethyl-1,3-propanediol (210°C), 3-methyl-1,3-butanediol (203°C), 2-ethyl-1,3-hexanediol (244°C), 3-methyl-1,5-pentanediol (250°C), 2-methylpentane-2,4-diol (197°C), diethylene glycol (245°C), dipropylene glycol (232°C), triethylene glycol (287°C), glycerol (290°C), and the like can be exemplified. Note that the numerical values in parentheses indicate the standard boiling point.

[0144] 1.2.1.4 Other components

[0145] The second treating agent can further contain, as needed, a pH adjusting agent, a surfactant, a preservative and a mold-proof agent, a rust preventive, a chelating agent, a viscosity adjusting agent, an antioxidant, an antifungal agent, and the like. Note that the kind and content of the pH adjusting agent and the surfactant can be the same as those of the aforementioned first treating agent.

[0146] Note that, from the viewpoint of ensuring excellent rubbing fastness, the second treating agent preferably substantially contains no pigment. By "substantially contains no pigment" is meant that the second treating agent contains no pigment at all or the content of the pigment is less than 0.1 mass% relative to the total amount (100 mass%) of the second treating agent.

[0147] 1.2.2 Attachment method

[0148] The second treating agent attachment step sprays the second treating agent toward the cloth to which the first treating agent has been attached together with a heated gas from a nozzle front port having a temperature of 50°C or higher than the standard boiling point of the second water-soluble organic solvent. Note that the nozzle front port refers to, for example, the nozzle front region corresponding to the position of the boundary between the inside and the outside of the nozzle hole.

[0149] In the case where two or more kinds of second water-soluble organic solvents are used in combination, the standard boiling point of the second water-soluble organic solvent refers to the standard boiling point in a mixed solution of two or more kinds of second water-soluble organic solvents calculated according to the following general formula (2).

[0150]

[0151] In General Formula (2) above, BP ave is the standard boiling point of the mixed solution of two or more second water-soluble organic solvents, M i is the mass ratio of the second water-soluble organic solvent i in the total amount of the second water-soluble organic solvents (mass of the second water-soluble organic solvent i / total mass of all the second water-soluble organic solvents), BP i is the standard boiling point of the second water-soluble organic solvent i, and n is an integer of 2 or more.

[0152] In the second-treatment-agent-attaching step, the temperature of the nozzle tip port is a temperature of 50°C or more higher than the standard boiling point of the second water-soluble organic solvent, preferably a temperature of 60°C or more higher, more preferably a temperature of 70°C or more higher, particularly preferably a temperature of 80°C or more higher, particularly preferably a temperature of 90°C or more higher, more particularly preferably a temperature of 100°C or more higher, and further more preferably a temperature of 110°C or more higher. When the temperature of the nozzle tip port is a temperature of 50°C or more higher than the standard boiling point of the second water-soluble organic solvent, the second water-soluble organic solvent has a tendency to attach the second treatment agent to the cloth in a further volatilized state, and further more excellent rubbing fastness can be obtained.

[0153] The temperature of the nozzle tip port can be measured by, for example, a thermocouple or a thermal imager. The temperature of the nozzle tip port is preferably 180°C or more, more preferably 210°C or more, further more preferably 240°C or more, particularly preferably 270°C or more, more particularly preferably 300°C or more, and further more preferably 330°C or more. The upper limit of the temperature of the nozzle tip port is not particularly limited, and can be, for example, 450°C or less, preferably 400°C or less, and more preferably 380°C or less.

[0154] As one embodiment of the second-treatment-agent-attaching step, the temperature of the nozzle tip port can be a temperature of 50°C or more higher than the standard boiling point of the solvent having the highest standard boiling point among the second water-soluble organic solvents, and more preferably a temperature of 50°C or more higher than the standard boiling point of the solvent having the highest standard boiling point among the second water-soluble organic solvents.

[0155] As one embodiment of the second-treatment-agent-attaching step, the temperature of the heated gas immediately before the contact with the second treatment agent can be a temperature of 50°C or more higher than the standard boiling point of the second water-soluble organic solvent, and more preferably a temperature of 50°C or more higher than the standard boiling point of the second water-soluble organic solvent.

[0156] The nozzle for spraying the second treatment agent and the heating gas is not particularly limited, and examples thereof include a single-fluid nozzle for spraying one fluid and a dual-fluid nozzle for spraying two fluids. Note that the second treatment agent attaching step can separately spray the second treatment agent and the heating gas from independent single-fluid nozzles. In this case, the nozzle for spraying the second treatment agent can be used as the first nozzle, the nozzle for spraying the heating gas can be used as the second nozzle, and the temperature of the front end port of the first nozzle and / or the front end port of the second nozzle can be set to a temperature of 50°C or more higher than the normal boiling point of the second water-soluble organic solvent. More preferably, the temperature of the front end port of the second nozzle is set to a temperature of 50°C or more higher than the normal boiling point of the second water-soluble organic solvent, so that the liquid (second treatment agent) is less likely to be heated inside the first nozzle, and thus clogging can be prevented and continuous ejection stability can be improved.

[0157] In the treatment method according to the present embodiment, the second treatment agent attaching step is more preferably performed by spraying from a sprayer provided with a dual-fluid nozzle. By spraying the second treatment agent and the heating gas using a dual-fluid nozzle, the spray droplet size can be made smaller, and the volatilization of the volatile components such as water and the second water-soluble organic solvent (particularly, until the volatile components are attached to the fabric) can be promoted. In addition, since a dual-fluid nozzle can spray at a higher pressure, the spray droplet size can be easily made smaller. In addition, since a dual-fluid nozzle can spray after mixing the second treatment agent and the heating gas, the second treatment agent can be heated more efficiently compared to the case where the second treatment agent and the heating gas are mixed after being sprayed using a single-fluid nozzle, and the volatilization of the volatile components can be further promoted. Thus, the second treatment agent can be attached to the fabric in a state where the volatile components are more volatilized, and thus the rubbing fastness can be improved.

[0158] The material of the nozzle is not particularly limited, and examples thereof include brass, stainless steel, and plastic. Among them, stainless steel is preferable in terms of superior rubbing wear resistance and corrosion resistance.

[0159] The nozzle pressure can be appropriately adjusted. In the case of spraying a liquid, the pressure is preferably 0.10 MPa or less, more preferably 0.08 MPa or less, and further preferably 0.05 MPa or less. In the case of spraying a gas, the pressure is preferably 0.1 to 0.7 MPa, more preferably 0.2 to 0.6 MPa, and further preferably 0.3 to 0.5 MPa. Note that the nozzle pressure refers to the pressure at a portion just before the fluid flows into the nozzle.

[0160] The spray liquid amount can be appropriately adjusted, and is preferably, for example, 1 to 20 mL / min, more preferably 3 to 18 mL / min, more preferably 5 to 16 mL / min, and further preferably 7 to 14 mL / min. In addition, the spray air amount can be appropriately adjusted, and is preferably, for example, 9 to 200 L / min.

[0161] The average diameter of the liquid droplets sprayed from the nozzle, measured as the Sauter mean particle diameter, is preferably 30 μm or less, more preferably 25 μm or less, further preferably 20 μm or less, and particularly preferably 15 μm or less. Note that the Sauter mean particle diameter D 32 is the average diameter calculated from the following general formula (3) in the case where particles having diameters d i have n i .

[0162] D 32 = (Σn i · d i 3 ) / )Σn i · d i 2 )…(3)

[0163] In the second-treatment-agent-attaching step, the coating amount of the second treatment agent is preferably 1 to 10 g per A4 size (210 mm x 297 mm), more preferably 2 to 8 g, and further preferably 3 to 7 g. When the coating amount is within the above range, there is a tendency that the rubbing fastness can be made more favorable.

[0164] In the second-treatment-agent-attaching step, the surface temperature of the cloth is preferably 100 to 150°C, more preferably 100 to 140°C, further preferably 100 to 130°C, and particularly preferably 100 to 120°C. In the present embodiment, since the second treatment agent is sprayed together with the heated gas, the above temperature range can be achieved even in the case where the heating of the cloth based on the platen heater or the like is omitted or weakened. Also, when the surface temperature of the cloth in the second-treatment-agent-attaching step is within the above range, there is a tendency that the volatilization of the volatile component is more easily promoted, and the rubbing fastness becomes more favorable.

[0165] In the treatment method according to the present embodiment, the interval between the first treatment agent adhering step and the second treatment agent adhering step is preferably 3.0 seconds or more, more preferably 3.5 seconds or more, further preferably 4.0 seconds or more, and particularly preferably 5.0 seconds or more. There is no particular limitation on the upper limit, and for example, it is preferably 10.0 seconds or less, more preferably 9.0 seconds or less, and further preferably 8.0 seconds or less. In addition, the interval between the first treatment agent adhering step and the second treatment agent adhering step refers to, for example, the time from when the adhering of the first treatment agent to the cloth is completed until the second treatment agent is adhered to the region to which the first treatment agent is adhered. When the interval between the first treatment agent adhering step and the second treatment agent adhering step is within the above range, particularly 3.0 seconds or more, the first treatment agent can adhere to the second treatment agent in a drier state, and thus the tendency of bleeding is more reduced. Particularly, in the case where the cloth is subjected to the pretreatment step, the second treatment agent can be adhered after the components of the first treatment agent are further condensed, and thus the bleeding is further reduced.

[0166] 1.3 Drying Step

[0167] The treatment method according to the present embodiment can also include, after the second treatment agent adhering step, a drying step of heating the surface temperature of the cloth to 140°C to 160°C. The surface temperature of the cloth is more preferably 145°C to 160°C, further preferably 150°C to 160°C, and particularly preferably 155°C to 160°C. In the treatment method according to the present embodiment, since the second treatment agent is sprayed together with the heated gas, the volatilization of the volatile component is easily promoted. Therefore, even if the heating temperature in the drying step is as mild as the above range, drying can be sufficiently performed, and the rubbing fastness is good. Note that the drying step can also be natural drying without heating the cloth.

[0168] In addition, as another embodiment, a drying step of heating the surface temperature of the cloth to 100°C to 140°C can also be included after the second treatment agent adhering step. If the temperature range is this size, the application of heat load to the cloth including, for example, chemical fibers such as nylon and polyester is not easy, and thus it is preferable.

[0169] The heating time in the drying step is preferably 1 to 5 minutes, more preferably 2 to 4 minutes, and particularly preferably 2 to 3 minutes. As described above, in the treatment method according to the present embodiment, the volatilization of the volatile component is easily promoted, and thus even with such a heating time, good rubbing fastness is easily obtained, and the heat load to the cloth can be further reduced.

[0170] In the case where heating is performed in the drying step, the heating method is not particularly limited, and for example, heat press method, atmospheric pressure steam method, high-pressure steam method, and heat fixation method can be given. In addition, as a heat source for heating, for example, infrared rays (lamp) can be given.

[0171] 1.4 Pretreatment liquid attaching step

[0172] In order to improve the color development of the pigments of the recording material, the treatment method according to the present embodiment can also include a pretreatment liquid attaching step, that is, a step of attaching a pretreatment liquid for coagulating the components of the first treatment agent to the cloth before the first treatment agent is attached to the cloth.

[0173] As a method of attaching the pretreatment liquid to the cloth, for example, a method of dipping the cloth in the pretreatment liquid (dip coating), a method of applying the pretreatment liquid by a roll coater or the like (roll coating), a method of spraying the pretreatment liquid by a spraying device or the like (spray coating), a method of spraying the pretreatment liquid by an inkjet method (inkjet coating), and the like can be listed, and any method can be used.

[0174] The pretreatment liquid can be a substance containing at least a cationic compound and water. The cationic compound has a function of coagulating the components of the pigments, the first resin particles, and the like of the first treatment agent. The cationic compound is not particularly limited, and metal salts, acids, cationic organic compounds, and the like can be listed, and cationic resins (cationic polymers), cationic surfactants, and the like can be used as the cationic organic compounds. Among them, a polyvalent metal salt is preferable as the metal salt, and a cationic resin is preferable as the cationic organic compound. As the acid, organic acids, inorganic acids, and the like can be listed, and an organic acid is preferable. Note that the other components of the pretreatment liquid can be the same as the other components than the pigments that can be contained in the above-described first treatment agent.

[0175] 1.5 Other steps

[0176] The treatment method according to the present embodiment can also include, for example, a one-time heating step of heating the cloth immediately before, at the same time as, or immediately after the first treatment agent attaching step.

[0177] 2. Examples

[0178] Hereinafter, the present application will be described more specifically by examples, but the present application is not limited to these examples. Hereinafter, unless otherwise specified, "%" is a mass standard.

[0179] 2.1 Preparation of first treatment agent and second treatment agent

[0180] Each component was charged into a container so as to become the composition of the following Tables 1 and 2, and after mixing and stirring for 2 hours with an electromagnetic stirrer, filtration was performed with a membrane filter having a pore diameter of 5 μm, thereby obtaining the first treatment agent and the second treatment agent according to the examples and comparative examples. The values related to the amounts in the following Tables 1 and 2 indicate mass %, and ion exchange water was added so that the total mass of each treatment agent becomes 100 mass %.

[0181] Note that, in the case of the pigment used in the first treatment agent, a pigment dispersion (pigment solid content 20 mass%, resin solid content 5 mass%) prepared by previously dispersing CW-1 manufactured by Orient Chemical Industries, Ltd. as a self-dispersible pigment in ion-exchange water and adjusting the concentration was used.

[0182] Table 1

[0183]

[0184] Table 2

[0185]

[0186] The above Tables 1 to 2 are supplemented as follows.

[0187] The spray device used was a MINIATOMIZE NOZZLES MMA-10 (manufactured by EVERLOY Corporation) sprayer equipped with a two-fluid nozzle. The "temperature of the port at the front of the nozzle" records the temperature of the heated air immediately before mixing with the coating liquid (second treatment agent) in the nozzle.

[0188] The "SP value" is the SP value based on the Hansen method, with units of [(cal / cm 3 ) 1 / 2 ].

[0189] 2.2 Printing conditions

[0190] The cloth and fabric described in each of the examples of the above Tables 1 to 2 were printed by ejecting the first treatment agent from the inkjet head by the inkjet method using an inkjet printer (PX-G930: manufactured by Seiko Epson Corporation). The printing pattern was at a resolution of 1440 x 1440 dpi.

[0191] 2.3 Spray conditions

[0192] After printing was complete, heated air and each of the second treatment agents (coating liquid) described in the above Tables 1 to 2 were supplied to the two-fluid nozzle MINIATOMIZE NOZZLES MMA-10 (manufactured by EVERLOY Corporation) as a shower nozzle (sprayer), and the recording medium was sprayed from the printing surface at a position 20 cm apart in the vertical direction from the shower nozzle, and the coating liquid was applied. At this time, the scanning speed of the shower nozzle (relative speed of the recording medium to the shower nozzle) was adjusted so that the application amount of the coating liquid would be 5 g per A4 size. However, in Comparative Example 1, spraying of the second treatment agent was not performed. Note that the time from the start of printing until the application of the coating liquid was described as the "treatment interval" in the above Tables 1 to 2.

[0193] The heated air was generated by a hot air generator HAP4020 (manufactured by Eight Photo Machine Co., Ltd.), and the temperature immediately before mixing with the coating liquid in the spray nozzle was measured by a K-type thermocouple (manufactured by THREE HIGHT Co., Ltd.) of a front-welded type with a wire diameter of 0.2 mm, and is described as "temperature at the tip of the nozzle" in Tables 1 and 2 above. At this time, the set temperature of the hot air generator was adjusted so that the air temperature reached the target value. In addition, the liquid delivery amount to the spray nozzle was adjusted to 10 mL / min.

[0194] Further, after the coating of the coating liquid was completed, the recording medium was heated using a conveyor belt type dryer at the drying temperature and time described in Tables 1 and 2 above, thereby obtaining the printed matter of each example.

[0195] 2.4 Evaluation method

[0196] In each of the examples and comparative examples, evaluation tests of wet rubbing fastness, continuous ejection stability, and bleeding were performed. Hereinafter, the method and judgment criteria thereof will be described.

[0197] 2.4.1 Wet rubbing fastness

[0198] Each of the printed matters obtained above was evaluated using a gray scale according to the following evaluation criteria in accordance with the wet test prescribed in JIS L 0849 "Test method for color fastness to rubbing". Note that the test was performed by a rub meter method. The evaluation was performed by visually judging the staining grade according to the tenth article of JIS L 0801 cited in JIS L 0849 (judgment of color fastness).

[0199] In the case where the evaluation was B or more, it can be considered that good wet rubbing fastness was obtained.

[0200] Evaluation criteria

[0201] AA: rubbing fastness of 4 or more;

[0202] A: rubbing fastness of 3;

[0203] B: rubbing fastness of 2-3 (intermediate level);

[0204] C: rubbing fastness of 2;

[0205] D: rubbing fastness of less than 2.

[0206] 2.4.2 Continuous ejection stability

[0207] The spray nozzles were continuously operated under the above spray conditions. Evaluation was performed in accordance with the following evaluation criteria based on the continuous operation time. Note that in the case of evaluation of B or more, it was considered that good discharge stability was obtained.

[0208] Evaluation Criteria

[0209] A: The spray nozzles were continuously operated for 3 hours or more;

[0210] B: The spray nozzles were continuously operated for less than 3 hours and 2 hours or more;

[0211] C: The spray nozzles were not continuously operated for 2 hours or more.

[0212] 2.4.3 Bleeding

[0213] For the printed matter of each of the above examples, bleeding at the boundary between the recorded area of the image and the unrecorded white background was evaluated by visual observation in accordance with the following evaluation criteria. Note that in the case of evaluation of B or more, it was considered that good effects were obtained.

[0214] Evaluation Criteria

[0215] AA: No bleeding;

[0216] A: There was a slight amount of bleeding, but it could not be observed by visual observation;

[0217] B: A slight amount of bleeding could be confirmed by visual observation, but it was at a level that was not problematic;

[0218] C: Bleeding was significantly visible by visual observation, and it was at a level that would cause a problem.

[0219] 2.5 Evaluation Results

[0220] The evaluation results are shown in Tables 1 and 2 above.

[0221] From Tables 1 and 2 above, each of the examples had: a first treatment agent adhering step of adhering a first treatment agent containing a pigment, first resin particles, water, and a first water-soluble organic solvent from an inkjet head to a cloth; and a second treatment agent adhering step of adhering a second treatment agent containing second resin particles, water, and a second water-soluble organic solvent to the cloth on which the first treatment agent was adhered together with a heated gas from a nozzle tip, the temperature of the nozzle tip being a temperature of 50°C or more higher than the normal boiling point of the second water-soluble organic solvent, and in each of the examples, both rubbing fastness and continuous discharge stability were excellent.

[0222] Comparison of Example 1 and Comparative Example 1 showed that, in the case where the second treatment agent was not used, wet rubbing fastness was poor.

[0223] The comparison between Example 1 and Comparative Example 2 shows that, even when the second treating agent is used, the continuous ejection stability is poor when the second water-soluble organic solvent is not contained.

[0224] The comparison between Example 1 and Comparative Example 3 shows that, when the temperature of the front port of the nozzle is not a temperature that is 50°C or more higher than the normal boiling point of the second water-soluble organic solvent, the wet rubbing fastness is poor.

[0225] According to the results of Examples 1, 2 to 3, when the temperature of the front port of the nozzle is a temperature that is 50°C or more higher than the normal boiling point of the second water-soluble organic solvent, the wet rubbing fastness is excellent regardless of the kind of the second water-soluble organic solvent.

[0226] According to the results of Examples 1, 4 to 7, when both the first resin particles and the second resin particles contain urethane resin, the wet rubbing fastness is more excellent.

[0227] According to the results of Examples 1, 8 to 9, when the content of the second resin particles in the second treating agent is within the prescribed range, the wet rubbing fastness and the continuous ejection stability are both good.

[0228] According to the results of Examples 1, 10 to 14, when the second treating agent contains a second water-soluble organic solvent having an SP value within the prescribed range, the wet rubbing fastness is more excellent.

[0229] According to the results of Example 1, 15, when drying is performed at a temperature of 60°C or more in the drying step after the second treating agent attaching step, the wet rubbing fastness is more excellent.

[0230] According to the results of Example 1, 16, when the interval between the first treating agent attaching step and the second treating agent attaching step is 30 minutes or more, bleeding is less likely to occur.

[0231] According to the results of Example 1, 17, even when the cloth contains chemical fibers and high-temperature long-time drying cannot be performed, good wet rubbing fastness can be obtained.

[0232] The following is derived from the above-described embodiments.

[0233] One aspect of the treatment method includes:

[0234] a first treating agent attaching step in which a first treating agent containing a pigment, first resin particles, water, and a first water-soluble organic solvent is ejected from an inkjet head and attached to a cloth; and

[0235] A second treatment agent containing second resin particles, water, and a second water-soluble organic solvent is sprayed from a nozzle tip port together with a heated gas toward the cloth to which the first treatment agent is attached, and is attached to the cloth.

[0236] The temperature of the nozzle tip port is a temperature of 50°C or more higher than the normal boiling point of the second water-soluble organic solvent.

[0237] In one aspect of the treatment method described above,

[0238] The first resin particles can contain urethane resin.

[0239] In any aspect of the treatment method described above,

[0240] The second resin particles can contain urethane resin.

[0241] In any aspect of the treatment method described above,

[0242] The content of the second resin particles with respect to the total amount of the second treatment agent can be 6.0 to 15.0 mass%.

[0243] In any aspect of the treatment method described above,

[0244] The content of the second resin particles with respect to the total amount of the second treatment agent can be more than the content of the first resin particles with respect to the total amount of the first treatment agent.

[0245] In any aspect of the treatment method described above,

[0246] The content of the second water-soluble organic solvent with respect to the total amount of the second treatment agent can be 5.0 mass% or more.

[0247] In any aspect of the treatment method described above,

[0248] The content of a solvent having a normal boiling point of 180°C or more in the second water-soluble organic solvent with respect to the total amount of the second treatment agent can be 5.0 mass% or more.

[0249] In any aspect of the treatment method described above,

[0250] The second treatment agent can contain a solvent having a SP value of 9.0 to 11.0 in the second water-soluble organic solvent.

[0251] In any aspect of the treatment method described above,

[0252] The treatment method can include a drying process of heating the surface temperature of the cloth to 140°C to 160°C after the second treatment agent attachment process.

[0253] In any of the above-described processing methods,

[0254] The second treatment agent attaching process can be performed by spraying from a sprayer equipped with a two-fluid nozzle.

[0255] In any of the above-described processing methods,

[0256] The surface temperature of the cloth in the second treatment agent attaching process can be 100 to 150°C.

[0257] In any of the above-described processing methods,

[0258] The cloth can be any selected from among polyester and nylon.

[0259] In any of the above-described processing methods,

[0260] The interval between the first treatment agent attaching process and the second treatment agent attaching process can be 3.0 seconds or more.

[0261] The present application is not limited to the above-described embodiments, and can have various modifications. For example, the present application includes a configuration substantially the same as the configuration described in the embodiments, for example, a configuration in which the function, method, and result are the same, or a configuration in which the purpose and effect are the same. In addition, the present application also includes a configuration in which a non-essential part of the configuration described in the embodiments is replaced. In addition, the present application also includes a configuration that can achieve the same effects as the configuration described in the embodiments or a configuration that achieves the same purpose. In addition, the present application also includes a configuration in which a publicly known technology is added to the configuration described in the embodiments.

Claims

1. A treatment method characterized by comprising: a first treatment agent adhering process of adhering a first treatment agent to a cloth, the first treatment agent containing a pigment, a first resin particle, water, and a first water-soluble organic solvent; and a second treatment agent adhering process of adhering a second treatment agent to the cloth, the second treatment agent containing a second resin particle, water, and a second water-soluble organic solvent, a temperature of a nozzle tip of the second treatment agent adhering process is a temperature of 50°C or more higher than a normal boiling point of the second water-soluble organic solvent, the second treatment agent adhering process is performed by spraying from a sprayer equipped with a two-fluid nozzle.

2. The treatment method according to claim 1, characterized in that the first resin particle contains an urethane resin.

3. The treatment method according to claim 1, characterized in that the second resin particle contains an urethane resin.

4. The treatment method according to claim 1, characterized in that a content of the second resin particle with respect to a total amount of the second treatment agent is 6.0 to 15.0 mass%.

5. The treatment method according to claim 1, characterized in that a content of the second resin particle with respect to a total amount of the second treatment agent is more than a content of the first resin particle with respect to a total amount of the first treatment agent.

6. The treatment method according to claim 1, characterized in that a content of the second water-soluble organic solvent with respect to a total amount of the second treatment agent is 5.0 mass% or more.

7. The treatment method according to claim 1, characterized in that a content of a solvent having a normal boiling point of 180°C or more in the second water-soluble organic solvent with respect to a total amount of the second treatment agent is 5.0 mass% or more.

8. The treatment method according to claim 1, characterized in that the second treatment agent contains a solvent having a SP value of 9.0 to 11.0 in the second water-soluble organic solvent.

9. The treatment method according to claim 1, characterized in that the treatment method comprises, after the second treatment agent adhering process, a drying process of heating a surface temperature of the cloth to 140°C to 160°C.

10. The treatment method according to claim 1, characterized in that a surface temperature of the cloth in the second treatment agent adhering process is 100°C to 150°C.

11. The treatment method according to claim 1, characterized in that the cloth is any one selected from the group consisting of a polyester and a nylon.

12. The treatment method according to any one of claims 1 to 11, characterized in that an interval between the first treatment agent adhering process and the second treatment agent adhering process is 3.0 seconds or more. ​

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