Processing method

Abstract

To provide a treatment method that achieves excellent friction fastness as well as excellent continuous ejection stability.SOLUTION: A treatment method according to an embodiment of the present disclosure includes: a first treatment agent bonding step of ejecting a first treatment agent which contains a pigment, first resin particles, water, and a first water-soluble organic solvent from an ink jet head so as to be bonded to a cloth; and a second treatment agent bonding step of spraying a second treatment agent which contains second resin particles, water, and a second water-soluble organic solvent from a nozzle front hole together with a heated gas to the cloth to which the first treatment agent has been bonded, so that the second treatment agent is also bonded thereto. The nozzle front hole has a temperature higher than a standard boiling point of the second water-soluble organic solvent by 50°C or more.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a processing method. [Background technology]

[0002] Inkjet recording methods are capable of recording high-resolution images using relatively simple equipment and have been rapidly developing in various fields. Among these methods, various studies have been conducted on improving the abrasion resistance of recording media when recording using pigment-containing inks. While abrasion resistance can be improved to some extent by increasing the content of components such as resin particles in the ink, this method tends to cause clogging of the inkjet head nozzles and makes it difficult to ensure continuous ejection stability. Therefore, a processing method has been proposed in which an image is formed by inkjet recording and then an overcoat liquid is applied on top of the image.

[0003] For example, Patent Document 1 discloses a method in which ink is applied to paper by an inkjet method, and then an overcoat liquid is sprayed onto the ink together with heated gas. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-175665 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in inkjet recording methods, images are also formed on fabrics as recording media, and therefore it is required to ensure excellent continuous ejection stability while also providing excellent abrasion fastness, particularly wet abrasion fastness, to fabrics. [Means for solving the problem]

[0006] One aspect of the processing method according to the present invention is to a first treatment agent application step of ejecting a first treatment agent containing a pigment, first resin particles, water, and a first water-soluble organic solvent from an inkjet head and applying the first treatment agent to the fabric; a second treatment agent adhering step of spraying a second treatment agent containing second resin particles, water, and a second water-soluble organic solvent from a nozzle tip end together with heated gas onto the fabric to which the first treatment agent has been adhered, thereby adhering the second treatment agent to the fabric, The temperature at the tip of the nozzle is higher than the normal boiling point of the second water-soluble organic solvent by 50° C. or more. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic perspective view showing an inkjet recording apparatus according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present invention will be described. The embodiments described below are examples of the present invention. The present invention is not limited to the following embodiments, and includes various modified forms that are implemented within the scope of the present invention. Note that not all of the configurations described below are necessarily essential configurations of the present invention.

[0009] 1. Processing Method A processing method according to one embodiment of the present invention includes: a first treatment agent application step of ejecting a first treatment agent containing a pigment, first resin particles, water, and a first water-soluble organic solvent from an inkjet head and applying the first treatment agent to the fabric; a second treatment agent adhering step of spraying a second treatment agent containing second resin particles, water, and a second water-soluble organic solvent from a nozzle tip end together with heated gas onto the fabric to which the first treatment agent has been adhered, thereby adhering the second treatment agent to the fabric; The temperature at the tip of the nozzle is higher than the normal boiling point of the second water-soluble organic solvent by 50° C. or more.

[0010] It has been known that the abrasion resistance of fabrics can be improved to some extent by increasing the content of components such as resin particles in the ink. However, in this case, the increased resin content in the ink makes it more likely for the inkjet head nozzles to clog, making it difficult to ensure stable continuous ejection.

[0011] Therefore, a post-treatment has been proposed in which, after the ink is applied to the fabric, a treatment agent (overcoat liquid) containing components such as resin particles is applied to the ink-adhered fabric. This post-treatment can improve the abrasion resistance that is insufficient with the ink alone, thereby ensuring the stability of continuous ink ejection. In this case, the overcoat liquid may contain a water-soluble organic solvent for moisturizing purposes, so that the nozzles can be continuously ejected without clogging even when the ink contains components such as resin particles. However, the water-soluble organic solvent added for moisturizing purposes has low volatility and therefore tends to remain on the fabric, resulting in insufficient drying of the fabric. The water-soluble organic solvent remaining on the fabric can adversely affect abrasion resistance. Furthermore, drying the fabric thoroughly at high temperatures for a long period of time can potentially damage the fabric.

[0012] As a result of intensive research by the present inventors, it has been possible to achieve excellent friction resistance while ensuring excellent continuous discharge stability by spraying the overcoat liquid together with heated gas at a temperature higher than the boiling point of the water-soluble organic solvent by a predetermined amount or more. This is presumably because the overcoat liquid can be applied to the fabric in a state in which the water-soluble organic solvent has volatilized to a certain extent, but the effects of the present invention are not limited to this.

[0013] Each step of the processing method according to this embodiment will be described below.

[0014] 1.1 First treatment agent application process The treatment method according to this embodiment includes a first treatment agent deposition step 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 deposited on a fabric.

[0015] Each component contained in the first treatment agent will be described below.

[0016] 1.1.1 First treatment agent 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 fabric when applied to the fabric, and corresponds to an inkjet ink composition.

[0017] 1.1.1.1 Pigments The first treatment agent contains a pigment, and examples of the pigment that can be used include inorganic pigments and organic pigments.

[0018] The inorganic pigment is not particularly limited, but examples thereof include carbon blacks such as furnace black, lamp black, acetylene black, and channel black; and white inorganic oxides such as iron oxide, titanium oxide, zinc oxide, and silica.

[0019] Examples of carbon blacks include CI (Colour Index Generic Name) Pigment Black 1, 7, and 11. Commercially available carbon blacks may be used, such as Mitsubishi Chemical Corporation's No. 2300, No. 900, MCF88, No. 33, No. 40, No. 45, No. 52, MA7, MA8, MA100, and No. 2200B, Columbia Carbon's Raven (registered trademark) 5750, 5250, 5000, 3500, 1255, and 700, CABOT's Rega1 (registered trademark) 400R, 330R, and 660R, Mogul (registered trademark) L, and Monarch (registered trademark) 700, 800, 880, 900, 1000, 1100, 1300, and 1400, and Degussa's Color Black Examples include FW1, FW2, FW2V, FW18, FW200, S150, S160, S170, Printex (registered trademark) 35, U, V, 140U, Special Black 6, 5, 4A, 4, etc.

[0020] Examples of organic pigments include quinacridone pigments, quinacridonequinone pigments, dioxazine pigments, phthalocyanine pigments, anthrapyrimidine pigments, anthanthrone pigments, indanthrone pigments, flavanthrone pigments, perylene pigments, diketopyrrolopyrrole pigments, perinone pigments, quinophthalone pigments, anthraquinone pigments, thioindigo pigments, benzimidazolone pigments, isoindolinone pigments, azomethine pigments, and azo pigments.

[0021] Specific examples of organic pigments include the following:

[0022] 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., and preferably, one or a mixture of two or more selected from the group consisting of CI Pigment Blue 15:3, 15:4, and 60 can be exemplified.

[0023] 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, and CI Pigment Violet 19. Preferred examples include one or a mixture of two or more pigments selected from the group consisting of CI Pigment Red 122, 202, and 209, and CI Pigment Violet 19.

[0024] Examples of yellow pigments include CI 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, and 185. Preferred examples include one or a mixture of two or more selected from the group consisting of CI Pigment Yellow 74, 109, 110, 128, 138, 150, and 180.

[0025] Pigments of other colors can also be used, such as orange pigments and green pigments.

[0026] The pigments may be used alone or in combination of two or more.

[0027] In order to improve the dispersibility of the pigment in the first treatment agent, it is preferable to subject the pigment to a surface treatment or to incorporate a dispersant or the like.

[0028] The surface treatment of a pigment refers to a physical or chemical treatment in which functional groups such as carbonyl groups, carboxyl groups, aldehyde groups, hydroxyl groups, sulfone groups, ammonium groups, and salts thereof are directly or indirectly bonded to the surface of the pigment.

[0029] The pigment to be surface-treated is preferably a carbon black, from the viewpoint of achieving even better ejection stability. Commercially available surface-treated pigments may be used, such as "Microjet CW1" and "Microjet CW2" manufactured by Orient Chemical Industry Co., Ltd., and "CAB-O-JET 200" and "CAB-O-JET 300" manufactured by Cabot Corporation.

[0030] When a dispersant is blended 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 its molecular structure. Such dispersants have the effect that the hydrophobic portion adsorbs to the surface of pigment particles and the hydrophilic portion orients toward the aqueous medium side of the first treatment agent. This effect tends to make it possible to more stably incorporate the pigment as a dispersion into the first treatment agent. Such dispersants are not particularly limited, but examples thereof include acrylic resins, styrene-acrylic resins such as styrene-(meth)acrylic acid copolymers and styrene-(meth)acrylic acid-(meth)acrylate copolymers, styrene-maleic acid resins, and salts thereof, formalin condensates of aromatic sulfonates, etc., and one or more selected from these groups can be used. Note that commercially available dispersants may also be used.

[0031] Alternatively, a method of imparting dispersibility by coating pigment particles with a resin or the like may be used. Examples of methods that can be used to coat pigment particles include acid precipitation, phase inversion emulsification, and mini-emulsion polymerization.

[0032] The pigment content can be adjusted appropriately depending on the application, but 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, even more 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. When the pigment content is within the above range, continuous ejection stability tends to be better.

[0033] 1.1.1.2 First resin particles The first treatment agent contains first resin particles, which can further improve the adhesion of an image formed by the pigment in the first treatment agent adhered to the fabric.

[0034] Examples of the first resin particles include 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, etc., and preferably resin particles made of one or more of these resins. These resin particles are often handled in the form of an emulsion, but may also be supplied in the form of a powder.

[0035] Urethane resin is a general term for resins containing urethane bonds. Examples of urethane resins that may be used include polyether-type urethane resins containing ether bonds in the main chain, polyester-type urethane resins containing ester bonds in the main chain, and polycarbonate-type urethane resins containing carbonate bonds in the main chain. Commercially available urethane resins may also be used, such as Superflex 460, 460s, 840, and E-4000 (trade names, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), Rezamin D-1060, D-2020, D-4080, D-4200, D-6300, and D-6455 (trade names, manufactured by Dainichiseika Color & Chemicals Mfg. Co., Ltd.), Takelac WS-6021, 6061, and W-512-A-6 (trade names, manufactured by Mitsui Chemicals Polyurethanes Inc.), Sancure 2710 (trade name, manufactured by Lubrizol), and Permarin UA-150 (trade name, manufactured by Sanyo Chemical Industries, Ltd.).

[0036] Acrylic resin is a general term for polymers obtained by polymerizing at least an acrylic monomer such as (meth)acrylic acid or a (meth)acrylic acid ester as one component. Examples include resins obtained from acrylic monomers and copolymers of acrylic monomers with other monomers. Examples include acrylic-vinyl resins, which are copolymers of acrylic monomers and vinyl monomers. Another example of a vinyl monomer is styrene.

[0037] Examples of acrylic monomers that can be used include acrylamide and acrylonitrile. Commercially available resin particles made from acrylic resins may be available, such as FK-854 (trade name, manufactured by Chuo Rika Kogyo Co., Ltd.), Movinyl 952B and 718A (trade names, manufactured by Japan Coating Resins Co., Ltd.), and Nipol LX852 and LX874 (trade names, manufactured by Zeon Corporation).

[0038] In this specification, the acrylic resin may be a styrene-acrylic resin, which will be described later. In addition, in this specification, the term "(meth)acrylic" means at least one of acrylic and methacrylic.

[0039] Styrene-acrylic resins are copolymers obtained from styrene monomer and (meth)acrylic monomer, and examples include styrene-acrylic acid copolymer, styrene-methacrylic acid copolymer, styrene-methacrylic acid-acrylic acid ester copolymer, styrene-α-methylstyrene-acrylic acid copolymer, and styrene-α-methylstyrene-acrylic acid-acrylic acid ester copolymer. The styrene-acrylic resin may be a commercially available product, such as 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, and 7610 (trade names, manufactured by BASF), Mowinyl 966A, 975N, and 6960 (trade names, manufactured by Japan Coating Resins Co., Ltd.), and Vinyblan 2586 (manufactured by Nissin Chemical Industry Co., Ltd.).

[0040] The polyolefin resin has an olefin such as ethylene, propylene, or butylene in its structural skeleton, and known polyolefin resins can be appropriately selected and used. Commercially available polyolefin resins can be used, such as Arrowbase CB-1200 and CD-1200 (trade names, manufactured by Unitika Ltd.).

[0041] The polyester resin is, for example, a resin such as polyethylene terephthalate (PET) obtained by polymerizing an alkanediol such as ethylene glycol and a polycarboxylic acid such as terephthalic acid through dehydration condensation, and is preferably a water-dispersible polyester resin. Commercially available products may be used as the resin particles of the polyester resin, such as Vylonal MD-1200, 1500, 2000, 1480, and 1985 (trade names, manufactured by Toyobo Co., Ltd.).

[0042] Although commercially available products are listed above, the first resin particles may be obtained by synthesis. The first resin particles may be used alone or in combination of two or more types.

[0043] From the viewpoint of improving the fastness to friction, the first resin particles are preferably resin particles containing a urethane resin, an acrylic resin, or a polyester resin. In particular, when the first resin particles contain a urethane resin, the fastness to friction tends to be further improved, which is preferable. Furthermore, when the first resin particles contain a urethane resin and the second resin particles contained in the second treatment agent described later also contain a urethane resin, the adhesion between the first treatment agent and the second treatment agent layer is improved by using the same type of resin, and the fastness to friction can be further improved.

[0044] The content of the first resin particles in the first treatment agent is preferably 3.0 to 15.0 mass %, more preferably 4.0 to 12.0 mass %, even more preferably 5.0 to 9.0 mass %, and particularly preferably 6.0 to 8.0 mass %, as solids content relative to the total amount of the first treatment agent. When the content of the first resin particles is within the above range, excellent continuous discharge stability is ensured while good rub fastness is likely to be achieved.

[0045] 1.1.1.3 Water The first treatment agent contains water.

[0046] The water is not particularly limited, but examples thereof include pure water such as ion-exchanged water, ultrafiltered water, reverse osmosis water, and distilled water, as well as ultrapure water from which ionic impurities have been removed as much as possible. Furthermore, using water sterilized by ultraviolet irradiation or the addition of hydrogen peroxide can prevent the growth of mold and bacteria when the first treatment agent is stored for a long period of time. This tends to further improve storage stability.

[0047] The water content is preferably 50% by mass or more, more preferably 55% by mass or more, even more preferably 60% by mass or more, particularly preferably 65% ​​by mass or more, more particularly preferably 70% by mass or more, and especially preferably 75% by mass or more, relative to the total amount of the first treatment agent. The upper limit of the water content is not particularly limited, but is preferably 90% by mass or less, more preferably 80% by mass or less, relative to the total amount of the first treatment agent.

[0048] 1.1.1.4 First water-soluble organic solvent The first treatment agent contains a first water-soluble organic solvent. One of the functions of the first water-soluble organic solvent is to improve the wettability of the first treatment agent to the fabric and to increase the moisture retention of the first treatment agent. The first water-soluble organic solvent can also function as a penetrant.

[0049] In this specification, "water-soluble" refers to a property in which the solubility in 100 g of water at 20°C is 0.1 g or more.

[0050] Examples of the first water-soluble organic solvent include esters, alkylene glycol ethers, cyclic esters, nitrogen-containing solvents, alcohols, polyhydric alcohols, etc. Examples of the nitrogen-containing solvent include cyclic amides and non-cyclic amides, etc. Examples of the non-cyclic amides include alkoxyalkylamides, etc.

[0051] Examples of esters include 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, Examples of the glycol monoacetates include propylene glycol monomethyl ether acetate, dipropylene glycol monomethyl ether acetate, and methoxybutyl acetate; and glycol diesters include ethylene glycol diacetate, diethylene glycol diacetate, propylene glycol diacetate, dipropylene glycol diacetate, ethylene glycol acetate propionate, ethylene glycol acetate butyrate, diethylene glycol acetate butyrate, diethylene glycol acetate propionate, diethylene glycol acetate butyrate, propylene glycol acetate propionate, propylene glycol acetate butyrate, dipropylene glycol acetate butyrate, and dipropylene glycol acetate propionate.

[0052] The alkylene glycol ethers may be monoethers or diethers of alkylene glycol, and alkyl ethers are preferred. Specific examples include 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. and alkylene glycol dialkyl ethers such as 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, and tripropylene glycol dimethyl ether.

[0053] Furthermore, among the alkylene glycols, diethers tend to dissolve or swell the first resin particles in the first treatment agent more easily than monoethers, and are therefore preferred in that they can further improve the abrasion resistance of the formed image.

[0054] Examples of cyclic esters include cyclic esters (lactones) such as β-propiolactone, γ-butyrolactone, δ-valerolactone, ε-caprolactone, 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-nonalactone, ε-nonalactone, and ε-decanolactone, as well as compounds in which the hydrogen atom of the methylene group adjacent to the carbonyl group of these cyclic esters is substituted with an alkyl group having 1 to 4 carbon atoms.

[0055] Examples of alkoxyalkylamides include 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, Examples include N-dimethylpropionamide, 3-n-propoxy-N,N-diethylpropionamide, 3-n-propoxy-N,N-methylethylpropionamide, 3-iso-propoxy-N,N-dimethylpropionamide, 3-iso-propoxy-N,N-diethylpropionamide, 3-iso-propoxy-N,N-methylethylpropionamide, 3-tert-butoxy-N,N-dimethylpropionamide, 3-tert-butoxy-N,N-diethylpropionamide, and 3-tert-butoxy-N,N-methylethylpropionamide.

[0056] Examples of cyclic amides include lactams, such as pyrrolidones such as 2-pyrrolidone, 1-methyl-2-pyrrolidone, 1-ethyl-2-pyrrolidone, 1-propyl-2-pyrrolidone, and 1-butyl-2-pyrrolidone, which are preferred in terms of accelerating the formation of a film on the resin particles, with 2-pyrrolidone being particularly preferred.

[0057] It is also preferable to use a compound represented by the following general formula (1) as the alkoxyalkylamide.

[0058] R 1 -O-CH2CH2-(C=O)-NR 2 R 3 ···(1)

[0059] In the above formula (1), R 1 represents an alkyl group having 1 to 4 carbon atoms, and R 2and R 3 each independently represents a methyl group or an ethyl group. The "alkyl group having 1 to 4 carbon atoms" can be a linear or branched alkyl group, such as a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, an isobutyl group, or a tert-butyl group. The compound represented by the above formula (1) may be used alone or in combination of two or more types.

[0060] The function of the compound represented by formula (1) is, for example, to improve the surface drying property and fixation property of the first treatment agent adhered to the fabric.

[0061] In addition, in the above formula (1), R 1 is more preferably a methyl group having one carbon atom. 1 The normal boiling point of the compound where R is a methyl group is 1 is lower than the normal boiling point of a compound in which the alkyl group has 2 to 4 carbon atoms. 1 When a compound in which R is a methyl group is used, the surface dryness of the adhesion area (particularly the surface dryness of an image recorded in a high-temperature, high-humidity environment) can be further improved in some cases.

[0062] When the compound represented by formula (1) is used, the content thereof is not particularly limited, but is about 5% by mass to 50% by mass, and preferably 8% by mass to 48% by mass, based on the total mass of the first treatment agent. When the content of the compound represented by formula (1) is within the above range, the fixability and surface dryness of the image (particularly the surface dryness when recorded in a high-temperature and high-humidity environment) can be further improved in some cases.

[0063] Examples of alcohols include compounds in which one hydrogen atom of an alkane has been substituted with a hydroxyl group. The alkane preferably has 10 or less carbon atoms, more preferably 6 or less, and even more preferably 3 or less. The alkane has 1 or more carbon atoms, preferably 2 or more. The alkane may be linear or branched. Examples of alcohols include methanol, ethanol, n-propyl alcohol, isopropyl alcohol, n-butanol, 2-butanol, tert-butanol, iso-butanol, n-pentanol, 2-pentanol, 3-pentanol, and tert-pentanol.

[0064] Polyhydric alcohols have two or more hydroxyl groups in the molecule and can be divided into, for example, alkanediols and polyols.

[0065] Examples of alkanediols include compounds in which an alkane is substituted with 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-butylene glycol (also known as 1,3-butanediol), 1,4-butanediol, 2,3-butanediol, 1,2-pentanediol, and 1,5-pentanediol. Examples of the methyl-1,5-pentanediol include 2-ethyl-1,3-hexanediol, 2-methyl-1,3-pentanediol, 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, and 2-methyl-2-propyl-1,3-propanediol.

[0066] Examples of polyols include condensates in which two or more molecules of alkanediols are intermolecularly condensed via the hydroxyl groups thereof, and compounds having three or more hydroxyl groups.

[0067] Examples of condensates in which two or more molecules of alkanediols are intermolecularly condensed via the hydroxyl groups thereof include dialkylene glycols such as diethylene glycol (standard boiling point 245°C) and dipropylene glycol, and trialkylene glycols such as triethylene glycol (standard boiling point 287°C) and tripropylene glycol.

[0068] The compound having three or more hydroxyl groups is a compound having an alkane or polyether structure as a backbone and having three or more hydroxyl groups. Examples of the compound having three or more hydroxyl groups include glycerin (normal boiling point 290°C), trimethylolethane, trimethylolpropane, 1,2,5-hexanetriol, 1,2,6-hexanetriol, pentaerythritol, and polyoxypropylenetriol.

[0069] Alkanediols and polyols can function mainly as penetrating solvents and / or moisturizing solvents, with alkanediols tending to have stronger penetrating solvent properties and polyols tending to have stronger moisturizing solvent properties.

[0070] The first water-soluble organic solvent may be used alone or in combination of two or more kinds.

[0071] The content of the first water-soluble organic solvent is preferably 2 to 20 mass %, more preferably 4 to 18 mass %, even more preferably 5 to 16 mass %, particularly preferably 7 to 14 mass %, and even particularly preferably 8 to 12 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 for a balanced improvement in rub fastness and continuous discharge stability to be achieved.

[0072] It is also preferable to set the content of the first water-soluble organic solvent having a standard boiling point of 180°C or higher, preferably 220°C or higher, more preferably 260°C or higher, and even more preferably 280°C or higher 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, the balance between moisture retention and drying properties tends to be better, and the friction resistance and continuous discharge stability tend to be better. The solvent having a standard boiling point of 180°C or higher will be described later.

[0073] 1.1.1.5 Surfactants The first treatment agent may further contain a surfactant. The surfactant has the function of reducing the surface tension of the first treatment agent and increasing its permeability into the fabric. Examples of the surfactant include nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants, and at least one of these can be used.

[0074] Examples of nonionic surfactants that can be used include acetylene glycol surfactants, fluorine surfactants, and silicone surfactants. The use of these surfactants tends to improve the wettability of fabrics with a relatively small amount of content. Commercially available acetylene glycol surfactants include Olfine E1010 (Nissin Chemical Industry Co., Ltd.).

[0075] When a surfactant is contained in the first treatment agent, the content thereof is preferably 0.01 to 1.0 mass %, more preferably 0.05 to 0.8 mass %, even more preferably 0.1 to 0.6 mass %, particularly preferably 0.15 to 0.5 mass %, and even particularly preferably 0.2 to 0.4 mass %, relative to the total amount of the first treatment agent. When the surfactant content is within the above range, continuous ejection stability may be improved.

[0076] 1.1.1.6 pH adjusters The first treatment agent may further contain a pH adjuster. Examples of pH adjusters include, but are not limited to, organic bases and inorganic bases. Examples of organic bases include alkanolamines such as triethanolamine, diethanolamine, monoethanolamine, and tri-isopropanolamine. Examples of inorganic bases that can be used include strong bases such as alkali metal or alkaline earth metal hydroxides, such as lithium hydroxide, potassium hydroxide, and calcium hydroxide.

[0077] When a pH adjuster is contained in the first treatment agent, the content thereof is preferably 0.01 to 1.0 mass %, more preferably 0.03 to 0.5 mass %, even more preferably 0.05 to 0.3 mass %, and particularly preferably 0.07 to 0.15 mass %, relative to the total amount of the first treatment agent. When the content of the pH adjuster is within the above range, the dispersion stability of the pigment is improved, and the continuous ejection stability may be further improved.

[0078] 1.1.1.7 Other ingredients The first treatment agent may further contain components such as antiseptics, antifungal agents, rust inhibitors, chelating agents, viscosity modifiers, antioxidants, and anti-mold agents, as required.

[0079] 1.1.2 Fabric Examples of the form of fabric used in the treatment method according to this embodiment include fabrics, clothing, and other accessories. Fabrics include woven fabrics, knitted fabrics, and nonwoven fabrics. Clothing and other accessories include sewn T-shirts, handkerchiefs, scarves, towels, carrier bags, cloth bags, curtains, sheets, bedspreads, wallpaper, and other furniture, as well as fabrics before and after cutting as parts before sewing. These forms include long rolls, cut to a specified size, and finished products.

[0080] The material constituting the fabric is not particularly limited, and examples thereof include natural fibers such as cotton, linen, wool, and silk; synthetic fibers such as polypropylene, polyester, acetate, triacetate, polyamide (e.g., nylon), and polyurethane; and biodegradable fibers such as polylactic acid, and blends of these fibers are also acceptable. For example, polyester fabrics are preferably fabrics made from polyester fibers alone (polyester) or a blend of polyester and cotton, and nylon fabrics are preferably fabrics made from nylon fibers alone (nylon) or a blend of nylon and cotton.

[0081] Polyester fibers are fibers synthesized, for example, by dehydration condensation of polyhydric alcohols and polycarboxylic acids. Preferred polyhydric alcohols include alkanediols, specifically ethylene glycol, 1,3-propanediol, 1,4-butanediol, and 1,4-cyclohexanedidimethanol. Examples of polycarboxylic acids include terephthalic acid and 2,6-naphthalenedicarboxylic acid. Examples of polyester fibers include 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-naphthalenedicarboxylic acid and ethylene glycol), and polybutylene naphthalate (condensation of 2,6-naphthalenedicarboxylic acid and 1,4-butanediol).

[0082] Nylon fibers include so-called n-nylon fibers synthesized by ring-opening polymerization of cyclic lactams, and so-called n,m-nylon fibers synthesized by polycondensation of dicarboxylic acids and diamines. Examples of n-nylon fibers include nylon 6 (ring-opening polymerization of ε-caprolactam), nylon 11 (ring-opening polymerization of undecane lactam), and nylon 12 (ring-opening polymerization of lauryllactam). Examples of n,m-nylon fibers include nylon 66 (condensation of adipic acid and hexamethylenediamine), nylon 610 (condensation of sebacic acid and hexamethylenediamine), nylon 6T (condensation of terephthalic acid and hexamethylenediamine), nylon 6I (condensation of isophthalic acid and hexamethylenediamine), nylon 9T (condensation of terephthalic acid and nonanediamine), and nylon M5T (condensation of terephthalic acid and methylpentadiamine).

[0083] From the viewpoint of more pronounced effects of the present invention, the fabric is preferably one selected from polyester and nylon. Fabrics selected from such materials are easily damaged by heat and cannot be dried at high temperatures for long periods of time. However, according to the treatment method of this embodiment, the second treatment agent is sprayed together with heated gas, which facilitates the evaporation of volatile components. Therefore, sufficient drying can be achieved without heating at high temperatures for long periods of time, and the fabric can have good friction fastness while reducing damage caused by heat.

[0084] The basis weight of the fabric is preferably 1.0 oz (ounce) or more and 10.0 oz or less, more preferably 2.0 oz or more and 9.0 oz or less, even more preferably 3.0 oz or more and 8.0 oz or less, and even more preferably 4.0 oz or more and 7.0 oz or less.

[0085] 1.1.3 Adhesion method In the first treatment agent application step, the first treatment agent is ejected from an inkjet head and applied to the fabric.

[0086] 1.1.3.1 Recording Device An inkjet recording apparatus equipped with an inkjet head that can be used in the first treatment agent application step will now be described with reference to FIG. 1. The inkjet recording apparatus is an apparatus that performs recording by ejecting minute droplets of an ink composition (first treatment agent) onto a recording medium such as fabric using an inkjet method, causing the droplets to land on the recording medium. FIG. 1 is a schematic perspective view showing an inkjet recording apparatus used in the first treatment agent application step according to this embodiment. In this embodiment, an on-carriage type printer in which an ink cartridge is mounted on a carriage will be described as an example of the inkjet recording apparatus. Note that the scale of each component in FIG. 1 is different from the actual scale in order to make each component large enough to be recognizable.

[0087] The printer 1 of this embodiment is what is known as a serial printer. A serial printer is a printer in which an inkjet head is mounted on a carriage that moves in a specific direction, and printing is performed while the inkjet head moves in conjunction with the movement of the carriage.

[0088] 1, the printer 1 has an inkjet head 3, a carriage 4, a main scanning mechanism 5, a platen roller 6, and a control unit (not shown) that controls the overall operation of the printer 1. The carriage 4 mounts the inkjet head 3, and ink cartridges 7a, 7b, 7c, 7d, 7e, and 7f that contain ink compositions to be supplied to the inkjet head 3 can be detachably attached to it.

[0089] 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 installed in the scanning direction (main scanning direction) of the carriage 4 as a support member for the carriage 4. The carriage 4 is driven by the motor 9 via the timing belt 8, and is capable of reciprocating along the guide shaft 10. As a result, the main scanning mechanism 5 has the function of reciprocating the carriage 4 in the main scanning direction.

[0090] The platen roller 6 has the function of transporting the fabric 2 on which recording is to be performed in a sub-scanning direction (the length direction of the fabric 2) that is perpendicular to the main scanning direction. Therefore, the fabric 2 is transported in the sub-scanning direction. In addition, the carriage 4 on which the inkjet head 3 is mounted can move back and forth in the main scanning direction, which is approximately the same as the width direction of the fabric 2, and the inkjet head 3 can scan relatively to the fabric 2 in the main scanning direction and the sub-scanning direction.

[0091] Ink cartridges 7a, 7b, 7c, 7d, 7e, and 7f are six independent ink cartridges. The ink cartridges 7a, 7b, 7c, 7d, 7e, and 7f can contain the first treatment agent of this embodiment. These ink cartridges contain individual first treatment agents of colors such as black, cyan, magenta, yellow, white, and orange, which can be used in any combination. While FIG. 1 shows six ink cartridges, this is not a limitation. A supply port (not shown) is provided at the bottom of each ink cartridge 7a, 7b, 7c, 7d, 7e, and 7f for supplying the first treatment agent contained in each ink cartridge to the inkjet head 3.

[0092] The inkjet head 3 has a nozzle surface (not shown) on the surface facing the fabric 2. On the nozzle surface, nozzle rows (not shown) consisting of a plurality of nozzles (not shown) are individually arranged corresponding to the first treatment agent of each color. The first treatment agent of each color is supplied to the inkjet head 3 from each ink cartridge and ejected as droplets from the nozzles by an actuator (not shown) within the inkjet head 3. The ejected droplets of the first treatment agent land on the fabric 2, forming an image, text, a pattern, color, etc. in a recording area of ​​the fabric 2.

[0093] Here, the inkjet head 3 uses a piezoelectric element as an actuator (driving means), but is not limited to this type. For example, an electromechanical conversion element that displaces a vibration plate as an actuator by electrostatic adsorption, or an electrothermal conversion element that ejects the first treatment agent as droplets by bubbles generated by heating may also be used.

[0094] In this embodiment, an on-carriage type printer 1 is used as an example of an inkjet recording device, but this is not limiting. For example, an off-carriage type printer in which an ink storage container such as an ink cartridge is not mounted on a carriage may also be used. Furthermore, the inkjet recording device used in the present invention is not limited to the serial printer described above, but may also be a line head printer in which the inkjet head is formed to be as wide as or wider than the width of the fabric 2 and performs recording without moving the inkjet head.

[0095] 1.1.3.2 Adhesion conditions, etc. In the first treatment agent application step, the maximum amount of the first treatment agent applied to the fabric is 1 mg / cm 2 More than 200mg / cm 2 and preferably 1 mg / cm 2 More than 30mg / cm 2 More preferably, 2 mg / cm or less 2 More than 25mg / cm 2 Less than 5 mg / cm, more preferably 2 More than 20mg / cm 2 Below 7 mg / cm, particularly preferably 2 More than 15mg / cm 2 In such a case, the color development of the recorded image is good, the drying property of the recorded image is good, bleeding of the image can be suppressed, and images such as pictures and letters can be recorded on the fabric with good reproducibility, which is preferable.

[0096] 1.2 Second treatment agent application process The treatment method according to this embodiment includes a second treatment agent adhering step in which a second treatment agent containing second resin particles, water, and a second water-soluble organic solvent is sprayed from a nozzle tip together with heated gas onto the fabric to which the first treatment agent has been adhered, thereby adhering the second treatment agent to the fabric, and the temperature of the nozzle tip is at least 50°C higher than the normal boiling point of the second water-soluble organic solvent.

[0097] Each component contained in the second treatment agent will be described below.

[0098] 1.2.1 Second treatment agent The second treatment agent contains at least second resin particles, water, and a second water-soluble organic solvent. The second treatment agent is applied to the fabric after the first treatment agent has been applied, and corresponds to a so-called post-treatment liquid or overcoat liquid.

[0099] 1.2.1.1 Second resin particles The second treatment agent contains second resin particles. The second resin particles have the function of significantly improving the friction fastness of the fabric when attached to the fabric. The second resin particles may be the same as the first resin particles described above. The second resin particles and the first resin particles may be the same type or different types.

[0100] From the viewpoint of improving the fastness to friction, the second resin particles are preferably resin particles containing a urethane resin, an acrylic resin, or a polyester resin. In particular, when the second resin particles contain a urethane resin, the fastness to friction tends to be further improved, which is preferable. Furthermore, when the second resin particles contain a urethane resin and the first resin particles contained in the first treatment agent also contain a urethane resin, the adhesion between the first treatment agent and the second treatment agent layer is improved by using the same type of resin, and the fastness to friction can be further improved.

[0101] The content of the second resin particles in the second treatment agent is preferably 3.0 to 20.0 mass %, more preferably 6.0 to 15.0 mass %, even more preferably 7.0 to 14.0 mass %, particularly preferably 8.0 to 12.0 mass %, and even more particularly preferably 9.0 to 11.0 mass %, based on the total amount of the second treatment agent, in terms of solids. When the content of the second resin particles is within the above range, particularly 6.0 to 15.0 mass %, good continuous ejection stability is ensured while improving rub fastness.

[0102] From the viewpoint of further improving rub fastness, the lower limit 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, even more preferably 7.0% by mass or more, particularly preferably 8.0% by mass or more, and even more particularly preferably 9.0% by mass or more, in terms of solids content relative to the total amount of the second treatment agent. From the viewpoint of ensuring good continuous discharge stability, the upper limit 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, even more preferably 14.0% by mass or less, particularly preferably 12.0% by mass or less, and even more particularly preferably 11.0% by mass or less, in terms of solids content relative to the total amount of the second treatment agent.

[0103] The content of the second resin particles relative to the total amount of the second treatment agent is preferably equal to or greater than the content of the first resin particles relative to the total amount of the first treatment agent, and more preferably greater than the content of the first resin particles relative to the total amount of the first treatment agent. Such a relationship tends to ensure good continuous ejection stability for both the first treatment agent and the second treatment agent, while also improving rub fastness.

[0104] The content of the second resin particles relative to the total amount of the second treatment agent is preferably at least 1.0% by mass higher, more preferably at least 2.0% by mass higher, and even more preferably at least 3.0% by mass higher, than the content of the first resin particles relative to the total amount of the first treatment agent. Meanwhile, the content of the second resin particles relative to the total amount of the second treatment agent is preferably at most 8.0% by mass higher, more preferably at most 6.0% by mass higher, and even more preferably at most 4.0% by mass higher, than the content of the first resin particles relative to the total amount of the first treatment agent. This relationship tends to ensure good continuous ejection stability for both the first treatment agent and the second treatment agent, while also improving rub fastness.

[0105] 1.2.1.2 Water The second treatment agent contains water. The water used in the second treatment agent is the same as that used in the first treatment agent.

[0106] The water content is preferably 55% by mass or more, more preferably 60% by mass or more, even more preferably 65% ​​by mass or more, particularly preferably 70% by mass or more, more particularly preferably 75% by mass or more, and especially preferably 80% by mass or more, relative to the total amount of the second treatment agent. The upper limit of the water content is not particularly limited, but is preferably 95% by mass or less, more preferably 90% by mass or less, relative to the total amount of the second treatment agent.

[0107] 1.2.1.3 Second water-soluble organic solvent The second treatment agent contains a second water-soluble organic solvent. The function of the second water-soluble organic solvent is, for example, to improve the moisture retention of the second treatment agent and thereby improve the continuous discharge stability. The second water-soluble organic solvent can be the same as the first water-soluble organic solvent described above, and may be used alone or in combination of two or more. Furthermore, the second water-soluble organic solvent and the first water-soluble organic solvent may be the same or different.

[0108] The second treatment agent preferably contains a second water-soluble organic solvent having an SP value of 9.0 to 11.0, more preferably a solvent having an SP value of 9.2 to 10.8, even more preferably a solvent having an SP value of 9.4 to 10.6, and particularly preferably a solvent having an SP value of 9.5 to 10.4. In the treatment method according to this embodiment, the second treatment agent is sprayed together with heated gas, and therefore, when the second treatment agent adheres to the fabric, the volatile components may decrease, resulting in reduced wettability. Even in such cases, by containing a solvent having an SP value within the above range, the wettability of the second treatment agent to the application surface can be improved, and a uniform application tends to be possible even with a relatively small application amount.

[0109] Here, the solubility parameter (SP value) will be explained. The SP value in the present invention is an SP value based on the Hansen method. The Hansen method classifies the SP value δ into three terms, and δ 2 =δd 2 +δp 2 +δh 2 δd, δp, and δh are solubility parameters corresponding to the dispersion force term, dipole-dipole force term, and hydrogen bond force term, respectively.

[0110] The unit of SP value is (cal / cm 3 ) 1 / 2 The SP value is a value proposed by Hansen (also called HSP) based on the idea that "two substances with similar intermolecular interactions are likely to dissolve in each other." In addition to being able to estimate by calculation, it can also be found experimentally and empirically, and many of these values ​​are described in various literature. In this embodiment, the SP value can be a value derived using the calculation software Hansen-Solubility HSPiP.

[0111] Examples of the second water-soluble organic solvent and its SP value based on the Hansen method include, but are not limited to, methanol (SP value: 14.84), ethanol (SP value: 11.8), 2-propanol (SP value: 12.7), n-propyl alcohol (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), glycerin (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), ethylenediaminetetraacetic acid (EPS) (SP value: 14.8 ... Chill 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 monoisopropyl 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: 1 0.0), 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).

[0112] Among the solvents exemplified above, one or more of diethylene glycol monobutyl ether (SP value: 9.5) and 2-methyl-1,3-pentanediol (SP value: 10.3) are more preferable, as they tend to have a better balance of moisturizing properties and drying properties, and to have better friction resistance and continuous ejection stability.

[0113] The content of the second water-soluble organic solvent relative 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, even more preferably 5.0% by mass or more, and particularly preferably 7.0% by mass or more. While the upper limit is not particularly limited, it is preferably 20.0% by mass or less, more preferably 15.0% by mass or less, even more 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, it tends to be possible to achieve a balanced improvement in friction fastness and continuous discharge stability.

[0114] It is also preferable that the content of the second water-soluble organic solvent having a standard boiling point of 180°C or higher be within the above range. The upper limit of the standard boiling point is not particularly limited, but is preferably 300°C or lower, more preferably 270°C or lower, even more preferably 240°C or lower, particularly preferably 210°C or lower, and even more particularly preferably 190°C or lower. The lower limit of the standard boiling point may be 220°C or higher, 260°C or higher, or 280°C or higher. When the content of the second water-soluble organic solvent having a standard boiling point equal to or higher than a specific value is within the above range, and particularly when the content of the second water-soluble organic solvent having a standard boiling point of 180°C or higher relative to the total amount of the second treatment agent is 5.0% by mass or higher, the balance between moisture retention and drying properties tends to be better, and the friction resistance and continuous discharge stability tend to be better.

[0115] Examples of solvents with a standard boiling point of 180°C or higher include 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- Examples include 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), and glycerin (290°C). The numbers in parentheses indicate standard boiling points.

[0116] 1.2.1.4 Other ingredients The second treatment agent may further contain, as necessary, components such as a pH adjuster, a surfactant, an antiseptic / anti-fungal agent, a rust inhibitor, a chelating agent, a viscosity adjuster, an antioxidant, an anti-fungal agent, etc. The types and amounts of the pH adjuster and surfactant may be the same as those of the first treatment agent described above.

[0117] From the viewpoint of ensuring excellent abrasion resistance, the second treatment agent preferably contains substantially no pigment. "Substantially no pigment" means that the second treatment agent contains no pigment at all, or the pigment content is less than 0.1 mass % relative to the total amount (100 mass %) of the second treatment agent.

[0118] 1.2.2 Adhesion method In the second treatment agent application step, the second treatment agent is sprayed from the nozzle tip together with heated gas onto the fabric to which the first treatment agent has been applied, thereby adhering the second treatment agent to the fabric, and the temperature of the nozzle tip is at least 50°C higher than the normal boiling point of the second water-soluble organic solvent. The nozzle tip refers to, for example, the nozzle tip region corresponding to the boundary between the inside and outside of the nozzle hole.

[0119] Here, when two or more second water-soluble organic solvents are used in combination, the normal boiling point of the second water-soluble organic solvent refers to the normal boiling point of a mixed solution of two or more second water-soluble organic solvents, calculated from the following general formula (2):

number

[0120] In the above general formula (2), BP ave is the normal boiling point of a mixed solution of two or more second water-soluble organic solvents, and M i is the mass ratio of the second water-soluble organic solvent i to 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), and BP i is the normal boiling point of the second water-soluble organic solvent i, and n is an integer of 2 or more.

[0121] In the second treatment agent application step, the temperature at the nozzle tip is at least 50° C. higher than the normal boiling point of the second water-soluble organic solvent, preferably at least 60° C. higher, more preferably at least 70° C. higher, even more preferably at least 80° C. higher, particularly preferably at least 90° C. higher, even particularly preferably at least 100° C. higher, and especially preferably at least 110° C. higher. When the temperature at the nozzle tip is at least the above-mentioned specific value higher than the normal boiling point of the second water-soluble organic solvent, the second treatment agent tends to be applied to the fabric in a state in which the second water-soluble organic solvent has more volatilized, resulting in better rub fastness.

[0122] The temperature of the nozzle tip can be measured, for example, using a thermocouple or thermography. The temperature of the nozzle tip is preferably 180°C or higher, more preferably 210°C or higher, even more preferably 240°C or higher, particularly preferably 270°C or higher, even more particularly preferably 300°C or higher, and even more preferably 330°C or higher. The upper limit of the temperature of the nozzle tip is not particularly limited, but may be, for example, 450°C or lower, preferably 400°C or lower, and more preferably 380°C or lower.

[0123] In one embodiment of the second treatment agent application process, the temperature at the nozzle tip may be at least 50°C higher than the normal boiling point of the second water-soluble organic solvent having the highest normal boiling point, more preferably at least the specified value higher than the normal boiling point of the second water-soluble organic solvent having the highest normal boiling point.

[0124] In one embodiment of the second treatment agent adhesion step, the temperature of the heated gas immediately before contacting with the second treatment agent may be at least 50°C higher than the normal boiling point of the second water-soluble organic solvent, more preferably at least the above-mentioned specific value higher than the normal boiling point of the second water-soluble organic solvent.

[0125] The nozzle for spraying the second treatment agent and the heated gas is not particularly limited, and examples thereof include a single-fluid nozzle for spraying one fluid and a two-fluid nozzle for spraying two fluids. The second treatment agent deposition step may involve spraying the second treatment agent and the heated gas from separate single-fluid nozzles. In this case, the nozzle for spraying the second treatment agent is designated as a first nozzle, and the nozzle for spraying the heated gas is designated as a second nozzle. The temperature of the tip of the first nozzle and / or the tip of the second nozzle may be set to a temperature 50°C or more higher than the normal boiling point of the second water-soluble organic solvent. More preferably, the temperature of the tip of the second nozzle is set to a temperature 50°C or more higher than the normal boiling point of the second water-soluble organic solvent. This makes it difficult for the liquid (second treatment agent) to heat up inside the first nozzle, preventing clogging and improving continuous discharge stability.

[0126] In the treatment method according to this embodiment, the second treatment agent application step is preferably performed by spraying from a sprayer equipped with a two-fluid nozzle. Spraying the second treatment agent and heated gas using a two-fluid nozzle can reduce the size of the spray droplets, accelerating the volatilization of volatile components such as water and the second water-soluble organic solvent (particularly the volatilization until they adhere to the fabric). Furthermore, a two-fluid nozzle can spray at higher pressure, making it easier to reduce the size of the spray droplets. Furthermore, a two-fluid nozzle can mix the second treatment agent and heated gas before spraying, which allows the second treatment agent to be heated more efficiently than when a single-fluid nozzle is used, where the second treatment agent and heated gas are mixed after spraying, and thus more likely to accelerate the volatilization of the volatile components. Therefore, the second treatment agent can be applied to the fabric in a state where the volatile components have been more volatilized, resulting in even better abrasion fastness.

[0127] The material of the nozzle is not particularly limited, but examples thereof include brass, stainless steel, and plastic. Among these, stainless steel is preferred from the viewpoint of superior wear resistance and corrosion resistance.

[0128] The nozzle pressure can be adjusted as appropriate, but when spraying a liquid, it is preferably 0.10 MPa or less, more preferably 0.08 MPa or less, and even more preferably 0.05 MPa or less. When spraying a gas, it is preferably 0.1 to 0.7 MPa, more preferably 0.2 to 0.6 MPa, and even more preferably 0.3 to 0.5 MPa. Note that the nozzle pressure refers to the pressure just before the fluid flows into the nozzle.

[0129] The amount of spray liquid can be adjusted as appropriate, but is preferably 1 to 20 mL / min, more preferably 3 to 18 mL / min, even more preferably 5 to 16 mL / min, and even more preferably 7 to 14 mL / min. The amount of spray air can be adjusted as appropriate, but is preferably 9 to 200 L / min.

[0130] The average diameter of the droplets sprayed from the nozzle is preferably 30 μm or less, more preferably 25 μm or less, even more preferably 20 μm or less, and particularly preferably 15 μm or less, in terms of Sauter mean particle diameter D 32 is the diameter d i particles of n i When there are particles, the average diameter is calculated using the following general formula (3). D 32 =(Σn i ·d i 3 ) / (Σn i ·d i 2 ) ···(3)

[0131] In the second treatment agent application step, the amount of the second treatment agent applied is preferably 1 to 10 g per A4 size (210 mm x 297 mm), more preferably 2 to 8 g, and even more preferably 3 to 7 g. When the amount applied is within the above range, better rub fastness tends to be achieved.

[0132] The surface temperature of the fabric in the second treatment agent application step is preferably 100 to 150°C, more preferably 100 to 140°C, even more preferably 100 to 130°C, and particularly preferably 100 to 120°C. In this embodiment, the second treatment agent is sprayed together with heated gas, so the temperature can be within the above range even if heating of the fabric using a platen heater or the like is omitted or weakened. Furthermore, when the surface temperature of the fabric in the second treatment agent application step is within the above range, volatilization of volatile components is more easily promoted, and the friction fastness tends to be better.

[0133] In the treatment method according to this embodiment, the interval between the first treatment agent application step and the second treatment agent application step is preferably 3.0 seconds or more, more preferably 3.5 seconds or more, even more preferably 4.0 seconds or more, and particularly preferably 5.0 seconds or more. The upper limit is not particularly limited, but is preferably 10.0 seconds or less, more preferably 9.0 seconds or less, and even more preferably 8.0 seconds or less. The interval between the first treatment agent application step and the second treatment agent application step refers to, for example, the time from when application of the first treatment agent to the fabric is complete until the second treatment agent is applied to the area where the first treatment agent has been applied. When the interval between the first treatment agent application step and the second treatment agent application step is within the above range, particularly 3.0 seconds or more, the second treatment agent can be applied in a drier state, which tends to further reduce bleeding. In particular, when a pretreatment step is performed on the fabric, the second treatment agent can be applied after the components of the first treatment agent have agglomerated, further reducing bleeding.

[0134] 1.3 Drying process The treatment method according to this embodiment may include a drying step in which the surface temperature of the fabric is heated to 140°C to 160°C after the second treatment agent application step. The surface temperature of the fabric is more preferably 145°C to 160°C, even more preferably 150°C to 160°C, and particularly preferably 155°C to 160°C. In the treatment method according to this embodiment, the second treatment agent is sprayed together with heated gas, which facilitates the evaporation of volatile components. Therefore, even if the heating temperature in the drying step is mild, such as within the above range, sufficient drying can be achieved and good friction fastness can be achieved. The drying step may be natural drying without heating the fabric.

[0135] In another embodiment, the method may include a drying step of heating the surface temperature of the fabric to 100° C. to 140° C. after the second treatment agent application step. This temperature range is preferable because it is less likely to impose a thermal load on fabrics containing chemical fibers such as nylon and polyester.

[0136] 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, the treatment method according to this embodiment tends to promote the evaporation of volatile components, so that even with such a heating time, good friction fastness can be easily obtained and the thermal load on the fabric can be further reduced.

[0137] When heating is performed in the drying step, the heating method is not particularly limited, and examples thereof include a heat press method, an atmospheric pressure steam method, a high pressure steam method, and a Thermofix method. An example of a heat source for heating is an infrared ray (lamp).

[0138] 1.4 Pretreatment liquid application process The processing method according to the present embodiment may include a pre-treatment liquid application step of applying a pre-treatment liquid that aggregates components of the first treatment agent to the fabric before applying the first treatment agent to the fabric, in order to improve the color development of the pigment in the recorded matter.

[0139] Examples of methods for applying the pretreatment liquid to a fabric include a method of immersing the fabric in the pretreatment liquid (dip coating), a method of applying the pretreatment liquid using a roll coater or the like (roller coating), a method of spraying the pretreatment liquid using a spray device or the like (spray coating), and a method of spraying the pretreatment liquid by an inkjet method (inkjet coating), and any of these methods may be used.

[0140] The pretreatment liquid may contain at least a cationic compound and water. The cationic compound functions to aggregate components of the first treatment agent, such as the pigment and first resin particles. The cationic compound is not particularly limited, but examples thereof include metal salts, acids, and cationic organic compounds. Examples of cationic organic compounds that can be used include cationic resins (cationic polymers) and cationic surfactants. Among these, polyvalent metal salts are preferred as metal salts, and cationic resins are preferred as cationic organic compounds. Examples of acids include organic acids and inorganic acids, with organic acids being preferred. Other components of the pretreatment liquid may be the same as the components other than the pigment that may be contained in the first treatment agent described above.

[0141] 1.5 Other processes The treatment method according to this embodiment may include, for example, a primary heating step of heating the fabric before, simultaneously with, or immediately after the first treatment agent application step.

[0142] 2. Working Example The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. Unless otherwise specified, "%" below is based on mass.

[0143] 2.1 Preparation of the first and second treatment agents The components were placed in a container to obtain the compositions shown in Tables 1 and 2 below, mixed and stirred for 2 hours with a magnetic stirrer, and then filtered through a membrane filter with a pore size of 5 μm to obtain first and second treatment agents according to the examples and comparative examples. The numerical values ​​relating to the amounts in Tables 1 and 2 below indicate mass %, and ion-exchanged water was added so that the total mass of each treatment agent became 100 mass %.

[0144] The pigment used in the first treatment agent was a pigment dispersion (pigment solid content 20% by mass, resin solid content 5% by weight) prepared by dispersing CW-1, a self-dispersing pigment manufactured by Orient Chemical Co., Ltd., in ion-exchange water and adjusting the concentration.

[0145] [Table 1]

[0146] [Table 2]

[0147] The following is a supplementary explanation of the descriptions in Tables 1 and 2 above. The spraying device used was a sprayer equipped with a two-fluid nozzle, Mini Atomize Nozzle MMA-10 (manufactured by Everloy Shoji Co., Ltd.) The "temperature at the nozzle tip" indicates the temperature of the heated air immediately before it was mixed with the coating liquid (second treatment agent) in the nozzle. "SP value" is the SP value based on the Hansen method, and the unit is [(cal / cm 3 ) 1 / 2 ].

[0148] 2.2 Printing conditions Using an inkjet printer (PX-G930, manufactured by Seiko Epson Corporation), the first treatment agent was ejected from the inkjet head by the inkjet method and printed onto the fabrics shown in each of the examples in Tables 1 and 2. The print pattern had a resolution of 1440 × 1440 dpi.

[0149] 2.3 Spray conditions After printing was completed, heated air and each of the second treatment agents (coating liquids) listed in Tables 1 and 2 above were sent to a two-fluid Mini Atomized Nozzle MMA-10 (manufactured by Everloy Shoji Co., Ltd.) used as a spray nozzle (sprayer), and the coating liquid was sprayed onto the printed surface of the recording medium from a position 20 cm away from the recording medium in a vertical direction to apply the coating liquid. The scanning speed of the spray nozzle (the relative speed between the recording medium and the spray nozzle) was adjusted so that the amount of coating liquid applied was 5 g per A4 size. However, in Comparative Example 1, spraying of the second treatment agent was not performed. The time from the completion of printing until the coating liquid was applied is referred to as the "treatment interval" and is listed in Tables 1 and 2 above.

[0150] The heated air was generated using a hot air generator HAP4020 (manufactured by Hakko Electric Co., Ltd.), and the temperature just before it was mixed with the coating liquid in the spray nozzle was measured using a 0.2 mm wire diameter K-type thermocouple (manufactured by Three High Co., Ltd.) with a welded tip, and this is recorded as the "nozzle tip temperature" in Tables 1 and 2 above. The set temperature of the hot air generator was adjusted so that the air temperature reached the desired value. The flow rate of the coating liquid to the spray nozzle was adjusted to 10 mL / min. Furthermore, after the coating of the coating liquid was completed, the recording medium was heated using a conveyor dryer at the drying temperature and for the time shown in Tables 1 and 2 above, to obtain the printed matter of each example.

[0151] 2.4 Evaluation Method For each example and comparative example, evaluation tests were carried out on wet rub fastness, continuous ejection stability and bleeding. The methods and evaluation criteria used will be described below.

[0152] 2.4.1 Wet rubbing fastness The printed fabrics obtained above were evaluated using a gray scale according to the following evaluation criteria in accordance with the wet test specified in JIS L 0849, "Test method for color fastness to rubbing." The test was performed using the crock meter method. The evaluation was performed by visually determining the staining grade in accordance with Clause 10 (Determination of color fastness) of JIS L 0801, which is cited in JIS L 0849. When the evaluation is B or higher, it can be said that good wet rub fastness is obtained. (Evaluation criteria) AA: Abrasion resistance exceeds grade 4 A: Rub resistance is grade 3 B: Rub resistance is grade 2-3 (intermediate grade) C: Friction resistance is second grade D: Rub fastness is less than grade 2

[0153] 2.4.2 Continuous discharge stability The spray nozzle was operated continuously under the above spraying conditions. The time during which continuous operation was possible was evaluated according to the following evaluation criteria. Note that if the evaluation was B or higher, it can be said that good discharge stability was obtained. (Evaluation criteria) A: The spray nozzle can be operated continuously for more than 3 hours. B: Spray nozzle can be operated continuously for less than 3 hours and for more than 2 hours C: The spray nozzle cannot be operated continuously for more than 2 hours.

[0154] 2.4.3 Bleeding The printed materials of each example obtained above were visually inspected for bleeding at the boundary between the recorded image area and the unrecorded white area, and evaluated according to the following evaluation criteria. A rating of B or higher indicates a good effect. (Evaluation criteria) AA: No bleeding A: There is slight bleeding, but it is not visible to the naked eye. B: Slight bleeding can be visually confirmed, but not a problem. C: There is a problem with the bleeding being noticeable even to the naked eye.

[0155] 2.5 Evaluation Results The evaluation results are shown in Tables 1 and 2 above.

[0156] As can be seen from Tables 1 and 2 above, in each example, which includes a first treatment agent adhesion step 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 adhered to a fabric, and a second treatment agent adhesion step in which a second treatment agent containing second resin particles, water, and a second water-soluble organic solvent is sprayed from the nozzle tip together with heated gas onto the fabric to which the first treatment agent has adhered, and adhered to the fabric, and the temperature of the nozzle tip is at least 50°C higher than the normal boiling point of the second water-soluble organic solvent, all of the examples had excellent friction resistance and continuous ejection stability.

[0157] Comparing Example 1 with Comparative Example 1, when the second treatment agent was not used, the wet rub fastness was poor.

[0158] Comparing Example 1 and Comparative Example 2, even when the second treatment agent was used, if the second water-soluble organic solvent was not contained, the continuous discharge stability was poor.

[0159] Comparing Example 1 with Comparative Example 3, when the temperature at the nozzle tip was not at least 50°C higher than the normal boiling point of the second water-soluble organic solvent, the wet rub fastness was poor.

[0160] The results of Examples 1, 2 and 3 showed that, regardless of the type of second water-soluble organic solvent, when the temperature at the nozzle tip was 50°C or more higher than the normal boiling point of the second water-soluble organic solvent, the wet rub fastness was excellent.

[0161] From the results of Examples 1 and 4 to 7, when both the first resin particles and the second resin particles contained a urethane resin, the wet rub fastness was superior.

[0162] The results of Examples 1, 8 and 9 show that when the content of the second resin particles in the second treatment agent is within a predetermined range, a good balance between wet rub fastness and continuous discharge stability can be achieved.

[0163] The results of Examples 1 and 10 to 14 show that when the second treatment agent contains a second water-soluble organic solvent having an SP value within a predetermined range, the wet rub fastness is superior.

[0164] The results of Examples 1 and 15 show that when drying is carried out at a predetermined temperature or higher in the drying step after the second treatment agent application step, wet rubbing fastness is superior.

[0165] The results of Examples 1 and 16 showed that bleeding was less likely to occur when the interval between the first treatment agent application step and the second treatment agent application step was a predetermined time or longer.

[0166] The results of Examples 1 and 17 show that good wet friction fastness can be obtained even when the fabric contains chemical fibers and cannot be dried at high temperatures for a long period of time.

[0167] The following can be derived from the above-described embodiment.

[0168] One aspect of the processing method is a first treatment agent application step of ejecting a first treatment agent containing a pigment, first resin particles, water, and a first water-soluble organic solvent from an inkjet head and applying the first treatment agent to the fabric; a second treatment agent adhering step of spraying a second treatment agent containing second resin particles, water, and a second water-soluble organic solvent from a nozzle tip end together with heated gas onto the fabric to which the first treatment agent has been adhered, thereby adhering the second treatment agent to the fabric, The temperature at the tip of the nozzle is higher than the normal boiling point of the second water-soluble organic solvent by 50° C. or more.

[0169] In one embodiment of the above processing method, The first resin particles may contain a urethane resin.

[0170] In any one of the above processing methods, The second resin particles may contain a urethane resin.

[0171] In any one of the above processing methods, The content of the second resin particles relative to the total amount of the second treatment agent may be 6.0 to 15.0% by mass.

[0172] In any one of the above processing methods, The content of the second resin particles relative to the total amount of the second treatment agent may be greater than the content of the first resin particles relative to the total amount of the first treatment agent.

[0173] In any one of the above processing methods, The content of the second water-soluble organic solvent relative to the total amount of the second treatment agent may be 5.0 mass % or more.

[0174] In any one of the above processing methods, The content of the second water-soluble organic solvent having a normal boiling point of 180° C. or higher relative to the total amount of the second treatment agent may be 5.0 mass % or higher.

[0175] In any one of the above processing methods, The second treatment agent may contain a solvent having an SP value of 9.0 to 11.0 from among the second water-soluble organic solvents.

[0176] In any one of the above processing methods, After the second treatment agent application step, a drying step of heating the surface of the fabric to a temperature of 140°C to 160°C may be provided.

[0177] In any one of the above processing methods, The second treatment agent application step may be carried out by spraying from a sprayer equipped with a two-fluid nozzle.

[0178] In any one of the above processing methods, The surface temperature of the fabric may be 100 to 150°C in the second treatment agent application step.

[0179] In any one of the above processing methods, The fabric may be any one selected from polyester and nylon.

[0180] In any one of the above processing methods, The interval between the first treatment agent application step and the second treatment agent application step may be 3.0 seconds or more.

[0181] The present invention is not limited to the above-described embodiments, and various modifications are possible. For example, the present invention includes configurations that are substantially the same as the configurations described in the embodiments, such as configurations with the same functions, methods, and results, or configurations with the same purpose and effects. The present invention also includes configurations in which non-essential parts of the configurations described in the embodiments are replaced. The present invention also includes configurations that achieve the same effects or purposes as the configurations described in the embodiments. The present invention also includes configurations in which publicly known technology is added to the configurations described in the embodiments. [Explanation of symbols]

[0182] 1... printer, 2... fabric, 3... inkjet head, 4... carriage, 5... main scanning mechanism, 6... platen roller, 7a, 7b, 7c, 7d, 7e, 7f... ink cartridges, 8... timing belt, 9... motor, 10... guide shaft

Claims

1. a first treatment agent application step of ejecting a first treatment agent containing a pigment, first resin particles, water, and a first water-soluble organic solvent from an inkjet head and applying the first treatment agent to the fabric; a second treatment agent adhering step of spraying a second treatment agent containing second resin particles, water, and a second water-soluble organic solvent from a nozzle tip end together with heated gas onto the fabric to which the first treatment agent has been adhered, thereby adhering the second treatment agent to the fabric; The temperature at the nozzle tip opening is at least 50°C higher than the normal boiling point of the second water-soluble organic solvent.

2. The method according to claim 1 , wherein the first resin particles contain a urethane resin.

3. The treatment method according to claim 1 or 2, wherein the second resin particles contain a urethane resin.

4. 4. The treatment method according to claim 1, wherein the content of the second resin particles relative to the total amount of the second treatment agent is 6.0 to 15.0% by mass.

5. 5. The treatment method according to claim 1, wherein a content of the second resin particles relative to a total amount of the second treatment agent is greater than a content of the first resin particles relative to a total amount of the first treatment agent.

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

7. 7. The treatment method according to claim 1, wherein the content of the second water-soluble organic solvent having a normal boiling point of 180°C or higher relative to the total amount of the second treatment agent is 5.0 mass% or higher.

8. 8. The processing method according to claim 1, wherein the second processing agent contains the second water-soluble organic solvent having an SP value of 9.0 to 11.

0.

9. 9. The treatment method according to claim 1, further comprising, after the second treatment agent application step, a drying step of heating the surface of the fabric to a temperature of 140°C to 160°C.

10. The treatment method according to claim 1 , wherein the second treatment agent application step is performed by spraying from a sprayer equipped with a two-fluid nozzle.

11. The treatment method according to any one of claims 1 to 10, wherein the surface temperature of the fabric in the second treatment agent application step is 100 to 150°C.

12. The method according to any one of claims 1 to 11, wherein the fabric is one selected from polyester and nylon.

13. 13. The treatment method according to claim 1, wherein an interval between the first treatment agent application step and the second treatment agent application step is 3.0 seconds or more.

Images