Printing method

Abstract

To provide a printing method capable of favorably printing on various fabrics, and capable of obtaining a printed fabric excellent in color development, and feeling.SOLUTION: A printing method incudes: a pretreatment liquid-attaching process of attaching a pretreatment liquid onto a fabric; a thermal transfer process of thermally transferring an image by facing a transfer medium formed with the image by a sublimation transfer inkjet ink containing a disperse dye and water to the fabric attached with the pretreatment liquid, where the pretreatment liquid includes a polyester resin, a cross-linking agent, and water, and the pretreatment liquid is attached onto the fabric by the pretreatment liquid-attaching process so that the product of a water absorbability [s] of the fabric obtained by a precipitation method JIS L 1907:2010 7.1.3 and a coating build-up [g / m2] of the polyester resin onto the fabric is 8.0[sg / m2] or more and 16.0[sg / m2] or less.SELECTED DRAWING: None

Description

[Technical field]

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

[0002] A textile printing method in which a sublimation dye is heated and transferred to a natural fiber product is used, for example, as a method for dyeing fabrics.

[0003] For the purpose of efficiently applying transfer printing, a method of treating a natural fiber product with a pretreatment liquid prior to the transfer of a sublimation dye has been investigated.

[0004] More specifically, a method has been proposed in which a hot-melt polyester resin having a glass transition point of 0°C or less is dissolved in a solvent selected from the group consisting of aromatic ethers and aromatic alcohols, the solution is dispersed in water, the resulting aqueous dispersion is applied to a natural fiber product, and after drying, the surface of the natural fiber product to which the resin is applied is brought into contact with a patterned surface of transfer paper on which a pattern is expressed with a sublimation dye, and the resulting material is heated to transfer the pattern (see Patent Document 1). Patent Document 1 states that the amount of polyester resin applied to the natural fiber product is 1 to 5 g / m2 in terms of solid content. 2 It is stated that it is acceptable to have a certain degree of [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2002-235288 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, Patent Document 1 has a problem in that, depending on the type of fiber, it is not possible to achieve both color development and texture. [Means for solving the problem]

[0007] The present invention has been made to solve the above-mentioned problems, and can be realized as the following application examples.

[0008] A textile printing method according to an application example of the present invention includes a pretreatment liquid application step of applying a pretreatment liquid to a fabric, a thermal transfer step of thermally transferring the image by placing a transfer medium on which an image has been formed using a sublimation transfer ink containing a disperse dye and water, and the fabric on which the pretreatment liquid has been applied, facing each other; The pretreatment liquid contains a polyester resin, a crosslinking agent, and water, JIS L 1907:2010 7.1.3 The water absorbency [s] of the fabric obtained by the sedimentation method and the adhesion amount [g / m 2 ] is 8.0 [s g / m 2 ] or more than 16.0[s·g / m 2 In the pretreatment liquid application step, the pretreatment liquid is applied to the fabric so that: [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a table showing the compositions of the pretreatment solutions prepared in Preparation Examples A1 to A6. [Diagram 2] FIG. 2 is a table showing the composition of the sublimation transfer inkjet ink prepared in Preparation Example B1. [Diagram 3] FIG. 3 is a table showing the types of pretreatment liquids, fabric conditions, and amounts of polyester resin adhered to the fabric [g / m2] in Examples 1 to 16. [Figure 4] FIG. 4 is a table summarizing the types of pretreatment liquids, fabric conditions, and amounts of polyester resin adhered to the fabric [g / m2] in Examples 17 to 22 and Comparative Examples 1 to 9. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Preferred embodiments of the present invention will now be described in detail. [1] Printing method First, the textile printing method of the present invention will be described.

[0011] The textile printing method of the present invention includes a pretreatment liquid application step of applying a pretreatment liquid to a fabric, and a thermal transfer step of thermally transferring the image by placing a transfer medium on which an image has been formed by a sublimation transfer inkjet ink containing a disperse dye and water, and the fabric on which the pretreatment liquid has been applied, facing each other. The pretreatment liquid contains a polyester resin, a crosslinking agent, and water. The water absorption [s] of the fabric obtained by the sedimentation method according to JIS L 1907:2010 7.1.3 and the amount of the polyester resin applied to the fabric [g / m 2 ] is 8.0 [s g / m 2 ] or more than 16.0[s·g / m 2 In the pretreatment liquid application step, the pretreatment liquid is applied to the fabric so that the water absorbency [s] of the fabric determined by the sedimentation method is smaller, the water absorbency is higher.

[0012] With this configuration, it is possible to suitably print various types of fabric, and to obtain printed products with excellent color development and texture.

[0013] On the other hand, if the above conditions are not met, satisfactory results will not be obtained. For example, if the pretreatment liquid application step is omitted and a disperse dye is directly transferred to a fabric that has not been pretreated with a pretreatment liquid, the color development of the resulting printed textile may not be sufficiently excellent, depending on the type of fabric.

[0014] If the pretreatment liquid does not contain a crosslinking agent, the color development of the resulting printed textile cannot be made sufficiently excellent, and the fastness of the printed textile will be inferior.

[0015] Furthermore, if the product of the water absorbency of the fabric and the amount of polyester resin attached to the fabric is less than the lower limit, the color development of the resulting printed textile cannot be made sufficiently excellent.

[0016] Furthermore, if the product of the water absorbency of the fabric and the amount of polyester resin attached to the fabric exceeds the upper limit, the texture of the resulting printed textile cannot be made sufficiently excellent.

[0017] In addition, in "JIS L 1907:2010 7.1.3 Sedimentation Method", the following equipment and tools are used: A water tank large enough that the test piece does not come into contact with it, a stopwatch capable of measuring 0.5 seconds, water specified in A1 to A4 of Table 1 (type and quality) of Annex 1 of JIS K 0050, and water temperature of 20°C ± 2°C.

[0018] In addition, in "JIS L 1907:2010 7.1.3 Sedimentation Method", the following procedure is carried out. That is, three test pieces measuring 10 mm x 10 mm are taken from the sample, and then the test pieces are floated in a tank of water with the measurement surface facing down, and the time until the test pieces become wet and start to sink in the water is measured to the nearest second with a stopwatch. If the test pieces do not sink after 60 seconds or more, it is determined that they do not sink. However, if one of the three test pieces does not sink, one more test piece is taken and the same test is carried out. The test results are expressed as the average time until the test pieces become wet and start to sink in the water, rounded to an integer according to Rule B (rounding method) of JIS Z 8401, for three test pieces or four pieces including the additional one that have sunk within 60 seconds. However, if two or more of the three test pieces or four pieces including the additional one do not sink, the sample is judged not to sink within 60 seconds. For samples with clearly different front and back sides or samples with clearly different processing, each front and back side shall be tested and the average value of these shall be used as the value of water absorption.

[0019] [1-1]Fabric Fabrics are fabrics made by shaping fibers into knitted fabrics, woven fabrics, nonwoven fabrics, and the like.

[0020] Examples of woven fabrics include plain weave, twill weave, satin weave, varied plain weave, varied twill weave, varied satin weave, variegated weave, patterned weave, single layer weave, double weave, multi-layer weave, warp pile weave, weft pile weave, and leno weave.

[0021] The fabric may be processed into clothing and other accessories, etc. Examples of clothing and other accessories include sewn T-shirts, handkerchiefs, scarves, towels, carrier bags, cloth bags, curtains, sheets, bed covers, wallpaper, and other furniture items.

[0022] The fabric may be processed into clothing and other accessories, etc. Examples of clothing and other accessories include sewn T-shirts, handkerchiefs, scarves, towels, carrier bags, cloth bags, curtains, sheets, bed covers, wallpaper, and other furniture items.

[0023] Examples of fibers constituting the fabric include natural fibers such as cotton, hemp, wool, silk, leather, and wood; synthetic fibers such as polypropylene, polyester, acetate, triacetate, polyamide, acrylic, and polyurethane; and biodegradable fibers such as polylactic acid. Blends of two or more of these fibers may also be used.

[0024] Among them, the fabric preferably contains fibers made of a material having a hydroxyl group.

[0025] In this way, the crosslinking agent contained in the pretreatment liquid reacts with the hydroxyl groups, so that the polyester resin dyed with the disperse dye can be more firmly held on the fabric. As a result, the fastness of the printed material, particularly the fastness to washing and the fastness to dry cleaning, can be improved. The texture, color development, etc. of the printed material can also be improved. Examples of fibers made of materials having hydroxyl groups include cellulose fibers such as cotton, rayon, and hemp.

[0026] The fabric preferably has a basis weight of, for example, 1.0 oz or more and 10.0 oz or less. This allows better recording on the fabric.

[0027] The fabric may be a fabric that has been colored with a dye in advance. The pretreatment liquid used in the present invention is less likely to leave treatment marks, so that even fabrics that have been colored in advance can be used. In other words, even if the fabric is colored, it is possible to perform textile printing with reduced treatment marks, and the quality and commercial value of the printed textile product can be improved compared to conventional methods.

[0028] Examples of dyes with which the fabric is pre-colored include water-soluble dyes such as acid dyes and basic dyes, disperse dyes used in combination with dispersants, reactive dyes, solvent dyes, etc. When cotton fabric is used as the fabric, it is preferable to use a disperse dye or reactive dye suitable for dyeing cotton, and it is more preferable to use a disperse dye.

[0029] Due to the differences in the above conditions, the water absorbency of the fabric, i.e., the water absorbency [s] of the fabric determined by the sedimentation method in JIS L 1907:2010 7.1.3, differs.

[0030] [1-2] Pretreatment liquid application process In the pretreatment liquid application step, a pretreatment liquid containing a polyester resin, a crosslinking agent, and water is applied to the fabric.

[0031] In the pretreatment liquid application step, the water absorption of the fabric [s] obtained by the sedimentation method according to JIS L 1907:2010 7.1.3 and the amount of the polyester resin applied to the fabric [g / m 2 ] is 8.0 [s g / m 2 ] or more than 16.0[s·g / m 2 ] The pretreatment liquid is applied to the fabric so as to result in the following.

[0032] As described above, in the present invention, the water absorption rate [s] of the fabric obtained by the sedimentation method according to JIS L 1907:2010 7.1.3 and the adhesion amount [g / m 2 ] of the polyester resin to the fabric are 2 ] is 8.0 [s g / m 2] or more than 16.0[s·g / m 2 In the pretreatment liquid application step, the pretreatment liquid is applied to the fabric so that the water absorption rate [s] of the fabric and the amount of the polyester resin applied to the fabric [g / m 2 It is preferable that the product of the water absorption capacity [s] of the fabric and the amount of the polyester resin attached to the fabric [g / m 2 ] is 8.1 [s g / m 2 ] or more than 15.8[s·g / m 2 ] or less, and 8.1 [s·g / m 2 ] or more than 14.0[s·g / m 2 ] or less, and 8.1 [s·g / m 2 ] or more than 13.6[s·g / m 2 ] or less is even more preferable. This allows the above-mentioned effects of the present invention to be more pronounced.

[0033] [1-2-1] Pretreatment solution Next, the pretreatment liquid will be described in detail.

[0034] [1-2-1-1] Polyester The pretreatment liquid contains a polyester resin.

[0035] Among various resins, the use of polyester resin can improve the fastness of the printed material, particularly the fastness to washing and dry cleaning, etc. Furthermore, the texture, color development, etc. of the printed material can be improved.

[0036] The polyester resin is a resin having a structural unit derived from a polyvalent carboxylic acid and a structural unit derived from a polyhydric alcohol.

[0037] Examples of polyvalent carboxylic acids include terephthalic acid, isophthalic acid, orthophthalic acid, phthalic acid, 4,4'-diphenyldicarboxylic acid, 2,5-naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, 2-potassium sulfoterephthalic acid, 5-sodium sulfoisophthalic acid, adipic acid, azelaic acid, sebacic acid, dodecanedicarboxylic acid, glutaric acid, succinic acid, trimellitic acid, trimesic acid, pyromellitic acid, trimellitic anhydride, phthalic anhydride, succinic anhydride, p-hydroxybenzoic acid, and salts thereof, and one or more selected from these can be used in combination. Examples of salts include potassium salts, sodium salts, calcium salts, magnesium salts, and the like.

[0038] Examples of polyhydric alcohols include ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, 1,3-propanediol, 1,3-butylene glycol, 1,4-butanediol, 1,6-hexanediol, 2-methyl-1,5-pentanediol, neopentyl glycol, 1,4-cyclohexanedimethanol, p-xylylene glycol, bisphenol A-ethylene glycol adduct, diethylene glycol, triethylene glycol, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, polytetramethylene oxide glycol, dimethylolpropionic acid, glycerin, trimethylolpropane, sodium dimethylolethylsulfonate, potassium dimethylolethylsulfonate, and potassium dimethylolpropionate. One or more selected from these may be used in combination.

[0039] The polyester resin preferably contains a hydroxy group, a carboxy group, a sulfonic acid group, and a sodium salt thereof.

[0040] Examples of sulfonic acid group-containing polyester resins include those having a constituent unit derived from a polyvalent carboxylic acid, a constituent unit derived from a polyhydric alcohol, and a constituent unit derived from a sulfonic acid group-containing aromatic monomer.

[0041] Examples of sulfonic acid group-containing aromatic monomers include 5-sulfoisophthalic acid, sulfoterephthalic acid, 4-sulfophthalic acid, 4-sulfonaphthalene-2,7-dicarboxylic acid, 4-sulfo-1,8-naphthalenedicarboxylic anhydride, and salts thereof, and one or more selected from these may be used in combination. Examples of salts include potassium salts, sodium salts, calcium salts, magnesium salts, etc., with sodium salts being preferred.

[0042] When the polyester resin contains the functional group, the polyester resin can react more favorably with the crosslinking agent, and the binding property to the fabric is improved. As a result, the fastness of the printed material, particularly the fastness to washing and the fastness to dry cleaning, can be improved. In addition, the texture, color development, etc. of the printed material can be improved. Such an effect is more remarkable when the crosslinking agent is an isocyanate group-containing compound or when the fabric contains fibers composed of a material having a hydroxyl group.

[0043] The polyester resin can be obtained by, for example, appropriately selecting one or more of the above-mentioned polyvalent carboxylic acids, polyhydric alcohols, and, if necessary, sulfonic acid group-containing aromatic monomers, and subjecting them to a conventional polycondensation reaction.

[0044] As such polyester resin, commercially available products can also be used. Examples of commercially available products include Eliteaire (registered trademark) KA-5071S, KT-8803, KT-9204, KT-8701, KT-8904, and KT-0507 (all trade names, manufactured by Unitika Ltd., polyester resin emulsion); Hi-Tec (registered trademark) SN-2002 (trade name, manufactured by Toho Chemical Industry Co., Ltd., polyester resin emulsion); Pluscoat (registered trademark) Z-221, Z-446, Z-561, Z-565, RZ-570, Z-592, Z-687, Z-690, Z-730, Z-760, RZ-105, RZ-570, and RZ-760 (all trade names, manufactured by GOO Chemical Industry Co., Ltd.); and Vylonal (registered trademark) MD-1200, MD-1500, and MD-2000 (all trade names, manufactured by Toyobo Co., Ltd.).

[0045] The glass transition point of the polyester resin is preferably 25°C or higher, more preferably 35°C or higher and 90°C or lower, and even more preferably 45°C or higher and 80°C or lower.

[0046] This makes it possible to reduce molecular motion of the polyester resin in the temperature range in which the printed material obtained by the printing method of the present invention is used, and to more suitably retain the disperse dye in the polyester resin, thereby improving the color development of the printed material and more suitably suppressing fading over time.

[0047] The polyester resin may be contained in the pretreatment liquid in any form, for example, in a dissolved state, but is preferably contained in a particulate, dispersed state.

[0048] The content of the polyester resin in the pretreatment liquid is preferably from 1.0 to 20.0% by mass, more preferably from 2.0 to 15.0% by mass, and even more preferably from 2.0 to 10.0% by mass.

[0049] This allows the fastness, texture, and color development of the printed product to be more suitably balanced.

[0050] [1-2-1-2] Crosslinking agent The pretreatment liquid contains a crosslinking agent.

[0051] This makes it possible to impart crosslinking properties to the pretreatment liquid, and to favorably bind the polyester resin, the disperse dye, and the fabric, thereby making it possible to obtain a printed item with excellent color development and fastness.

[0052] The crosslinking agent can be appropriately selected from known crosslinking agents, and may be one that starts crosslinking reaction at room temperature or one that starts crosslinking reaction by heat. Examples of such crosslinking agents include a crosslinking agent having self-crosslinking properties, a compound having a plurality of functional groups in the molecule that react with an unsaturated carboxylic acid component, and a metal having a polyvalent coordination site, and the like. The crosslinking agent is preferably one or more selected from the group consisting of an isocyanate group-containing compound and an oxazoline group-containing compound, and more preferably an isocyanate group-containing compound.

[0053] This allows the fastness, texture, and color development of the printed product to be more suitably balanced.

[0054] Examples of isocyanate group-containing compounds include water-dispersible (blocked) polyisocyanates. The (blocked) polyisocyanate means polyisocyanate and / or blocked polyisocyanate. These isocyanate group-containing compounds may be used alone or in combination of two or more.

[0055] Examples of water-dispersible polyisocyanates include those in which polyisocyanates to which hydrophilicity has been imparted by polyethylene oxide chains are dispersed in water with an anionic dispersant or a nonionic dispersant.

[0056] Examples of polyisocyanates include diisocyanates such as hexamethylene diisocyanate and isophorone diisocyanate; and derivatives (modified products) of polyisocyanates such as trimethylolpropane adducts, biuret products, and isocyanurates of these diisocyanates. The polyisocyanates may have an isocyanurate skeleton in their structure. These polyisocyanates may be used alone or in combination of two or more.

[0057] The water-dispersible blocked polyisocyanate is obtained by blocking the isocyanate group of the water-dispersible polyisocyanate with a blocking agent. Examples of the blocking agent include diethyl malonate, ethyl acetoacetate, ε-caprolactam, butanone oxime, cyclohexanone oxime, 1,2,4-triazole, dimethyl-1,2,4-triazole, 3,5-dimethylpyrazole, and imidazole. These blocking agents may be used alone or in combination of two or more.

[0058] The crosslinking agent is preferably an isocyanate group-containing compound having an isocyanurate skeleton in its structure, and more preferably a water-dispersible polyisocyanate having an isocyanurate skeleton in its structure. The isocyanate group-containing compound having an isocyanurate skeleton has at least three crosslinking points in its molecule, so that it can provide better adhesion between the polyester resin and the fabric. As a result, it is possible to provide a better balance between the fastness, texture, and color development of the printed material.

[0059] As such an isocyanate group-containing compound, commercially available products can be used, such as Fixer #100ECO, #104EA, #220, 70ECO, #70, #410, and #400 (all trade names, manufactured by Murayama Chemical Laboratory Co., Ltd.); Elastron (registered trademark) BN-11, BN-27, BN-69, and BN-77 (all trade names, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.).

[0060] Examples of oxazoline group-containing compounds include compounds having two or more oxazoline groups in the molecule. Examples of such oxazoline group-containing compounds include 2,2'-bis(2-oxazoline), 2,2'-methylene-bis(2-oxazoline), 2,2'-ethylene-bis(2-oxazoline), 2,2'-trimethylene-bis(2-oxazoline), 2,2'-tetramethylene-bis(2-oxazoline), 2,2'-hexamethylene-bis(2-oxazoline), 2,2'-octamethylene-bis(2-oxazoline), 2,2'-ethylene-bis(4,4'-dimethyl-2-oxazoline), and the like. ), 2,2'-p-phenylene-bis(2-oxazoline), 2,2'-m-phenylene-bis(2-oxazoline), 2,2'-m-phenylene-bis(4,4'-dimethyl-2-oxazoline), bis(2-oxazolinylcyclohexane)sulfide, bis(2-oxazolinylnorbornane)sulfide, oxazoline ring-containing polymers, and the like can be used alone or in combination of two or more selected from these, but it is preferable to contain a water-soluble oxazoline group-containing compound.

[0061] This allows the fastness, texture, and color development of the printed product to be more suitably balanced.

[0062] As such an oxazoline group-containing compound, commercially available products can be used, such as EPOCROS (registered trademark) K-2010, K-2020, K-2030, K-2035E, WS-300, WS-500, and WS-700 (all trade names, manufactured by Nippon Shokubai Co., Ltd.).

[0063] The crosslinking agent may be used alone or in combination of two or more kinds. The content of the crosslinking agent in the pretreatment liquid is preferably from 0.1% by mass to 5.0% by mass, and more preferably from 0.5% by mass to 3.0% by mass.

[0064] This makes it possible to achieve a more suitable balance between fastness, texture, and color development of the printed material when various types of fabric are used.

[0065] [1-2-1-3]Water The pretreatment liquid contains water.

[0066] Water is a component that mainly imparts fluidity to the pretreatment liquid. After the pretreatment liquid is applied to the fabric, most of the water evaporates and dissipates.

[0067] Examples of water include pure water such as ion-exchanged water, ultrafiltered water, reverse osmosis water, distilled water, and ultrapure water from which ionic impurities have been removed as much as possible. Water sterilized by ultraviolet irradiation, addition of hydrogen peroxide, or the like is preferable because it can suppress the growth of mold and bacteria when the pretreatment solution is stored for a long period of time.

[0068] The water content in the pretreatment liquid is preferably from 30.0 to 98.0% by mass, more preferably from 35.0 to 96.0% by mass, and even more preferably from 40.0 to 94.0% by mass.

[0069] This can suppress an increase in the viscosity of the pretreatment liquid, improving the workability when applying the pretreatment liquid to the fabric and the drying property after application, and also improving affinity for fabrics containing fibers having hydroxyl groups.

[0070] [1-2-1-4] Organic solvents The pretreatment liquid may further contain an organic solvent. This improves the permeability of the pretreatment liquid into the fabric, resulting in better color development.

[0071] Examples of the organic solvent include glycerin, glycol, glycol ether, nitrogen-containing solvents, esters, cyclic esters, monools, etc., and one or more selected from these may be used in combination. However, one or more selected from the group consisting of glycols, glycol ethers, and nitrogen-containing solvents are preferred.

[0072] This allows the fastness, texture, and color development of the printed product to be more suitably balanced.

[0073] The boiling point of the organic solvent is preferably 100°C or higher, more preferably 110°C or higher and 300°C or lower, and even more preferably 120°C or higher and 289°C or lower.

[0074] This allows the fastness, texture, and color development of the printed product to be more suitably balanced.

[0075] In this specification, unless otherwise specified, the boiling point means the boiling point at a standard atmospheric pressure of 1013.25 hPa, i.e., the standard boiling point.

[0076] The SP value of the organic solvent is preferably 13.5 or less, more preferably 7.0 or more and 13.0 or less, and even more preferably 8.0 or more and 12.5 or less.

[0077] This makes it possible to improve the compatibility between the organic solvent and the disperse dye contained in the sublimation transfer inkjet ink, and therefore the disperse dye can be more suitably dissolved in the organic solvent remaining near the fabric during the thermal transfer process, and the polyester resin can be more suitably dyed near the fabric, resulting in a better balance of fastness, texture, and color development of the printed material.

[0078] In this specification, the SP value refers to a solubility parameter based on the Hansen method, and is also called the Hansen SP value. The Hansen method classifies the SP value δ into three terms and calculates it as δ2 = δd2 + δp2 + δh2. δd, δp, and δh are solubility parameters corresponding to the dispersion force term, dipole-dipole force term, and hydrogen bond force term, respectively. The units of the SP value and the Hansen SP value are (cal / cm 3 ) 1 / 2 As the Hansen SP value, for example, a value derived using calculation software Hansen-Solubility HSPiP may be used.

[0079] Examples of glycols include ethylene glycol, triethylene glycol (SP value: 13.5, standard boiling point: 287°C), 1,2-hexanediol (SP value: 12.1, standard boiling point: 170°C), diethylene glycol (SP value: 12.1, standard boiling point: 245°C), dipropylene glycol (SP value: 12.1, standard boiling point: 231°C), 1,3-butanediol (SP value: 11.6, standard boiling point: 207°C), 1,6-hexanediol (SP value: 12.3, standard boiling point: 250°C), tetraethylene glycol (SP value: 12.3, standard boiling point: 314°C), and 2-ethyl-1,3-hexanediol (SP value: 11.3, standard boiling point: 244°C).

[0080] Examples of glycol ethers include dipropylene glycol monomethyl ether (SP value: 10.1, standard boiling point: 188°C), dipropylene glycol dimethyl ether (SP value: 8.4, standard boiling point: 171°C), triethylene glycol monobutyl ether (SP value: 10.0, standard boiling point: 278°C), ethylene glycol diethyl ether (SP value: 8.3, standard boiling point: 189°C), ethylene glycol monoethyl ether (SP value: 10.5, standard boiling point: 135°C), ethylene glycol monophenyl ether (SP value: 11.5, standard boiling point: 245°C), ethylene glycol monobutyl ether (SP value: 10.5, standard boiling point: 135°C), ethylene glycol monophenyl ether (SP value: 11.5, standard boiling point: 245°C), and ethylene glycol monobutyl ether (SP value: 10.5, standard boiling point: 135°C). ether (SP value: 9.5, standard boiling point: 171°C), ethylene glycol monobenzyl ether (SP value: 10.9, standard boiling point: 256°C), ethylene glycol monomethyl ether (SP value: 11.4, standard boiling point: 124°C), diethylene glycol monoethyl ether (SP value: 10.2, standard boiling point: 202°C), diethylene glycol monobutyl ether (SP value: 10.0, standard boiling point: 231°C), triethylene glycol monomethyl ether (SP value: 10.5, standard boiling point: 248°C), propylene glycol monomethyl ether (SP value: 10.0, standard boiling point: 121°C), and the like.

[0081] Examples of nitrogen-containing solvents include 2-pyrrolidone (SP value: 11.5, standard boiling point: 245°C), dimethylformamide (SP value: 12.2, standard boiling point: 153°C), N-methyl-2-pyrrolidone (SP value: 11.2, standard boiling point: 202°C), and aniline (SP value: 11.6, standard boiling point: 184°C).

[0082] Examples of esters include ethylene glycol diacetate (SP value: 10.0, standard boiling point: 190°C), ethylene glycol monomethyl ether acetate (SP value: 9.2, standard boiling point: 145°C), diethylene glycol monobutyl ether acetate (SP value: 8.5, standard boiling point: 246°C), allyl acetate (SP value: 9.2, standard boiling point: 103°C), and butyl acetate (SP value: 8.5, standard boiling point: 126°C).

[0083] Examples of cyclic esters include ε-caprolactone (SP value: 10.1, normal boiling point: 241° C.).

[0084] Examples of monools include methanol, ethanol, 1-butanol (SP value: 11.3, standard boiling point: 118°C), 2-ethyl-1-hexanol (SP value: 9.5, standard boiling point: 185°C), and 3-buten-1-ol (SP value: 11.0, standard boiling point: 114°C).

[0085] Among the above, the organic solvent preferably contains one or more selected from the group consisting of triethylene glycol, dipropylene glycol monomethyl ether, dipropylene glycol dimethyl ether, triethylene glycol monobutyl ether, and 2-pyrrolidone.

[0086] This allows the fastness, texture, and color development of the printed product to be more suitably balanced.

[0087] The content of the organic solvent in the pretreatment liquid is preferably 5.0% by mass or more, more preferably 5.0% by mass or more and 70.0% by mass or less, even more preferably 10.0% by mass or more and 55.0% by mass or less, and most preferably 15.0% by mass or more and 45.0% by mass or less.

[0088] This allows the fastness, texture, and color development of the printed product to be more suitably balanced.

[0089] [1-2-1-5] Other ingredients The pretreatment liquid may further contain components other than those described above. Hereinafter, such components will be referred to as "other components" in this section.

[0090] Examples of other components include surfactants, dissolution aids, viscosity adjusters, pH adjusters, antioxidants, preservatives, fungicides, corrosion inhibitors, and chelating agents.

[0091] Examples of preservatives include sodium pentachlorophenol, sodium 2-pyridinethiol-1-oxide, and 1,2-dibenzinethiazolin-3-one.

[0092] As the preservative, commercially available products can be used, such as CRL, BND, GXL, XL-2, and TN (all trade names) of the Proxel (registered trademark) series manufactured by Lonza Japan.

[0093] However, the content of other components in the pretreatment liquid is preferably 10.0% by mass or less, more preferably 7.0% by mass or less, and even more preferably 5.0% by mass or less.

[0094] [1-2-1-6] Other conditions It is preferable that the pretreatment liquid satisfies the following conditions.

[0095] [1-2-1-6-1] Viscosity The viscosity of the pretreatment liquid at 20° C. is preferably 1.5 mPa·s or more and 100 mPa·s or less.

[0096] This makes it possible to improve the coatability, such as the ease with which the pretreatment liquid spreads, when the pretreatment liquid is applied to the fabric.

[0097] The viscosity of the pretreatment liquid is measured, for example, using a viscoelasticity tester MCR-300 (manufactured by Pysica). More specifically, the viscosity can be measured by adjusting the temperature of the pretreatment liquid to 20°C and reading the shear viscosity [mPa s] at a shear rate of 200 [1 / s].

[0098] [1-2-1-6-2]Surface tension The surface tension of the pretreatment liquid at 25° C. is preferably 30 mN / m or more and 50 mN / m or less.

[0099] This allows the wettability and permeability of the pretreatment liquid into the fabric to be more appropriate, and also allows the pretreatment liquid to be more uniformly absorbed by the fabric, so that the occurrence of uneven application of the pretreatment liquid, i.e., differences in the amount of applied pretreatment liquid, can be more effectively suppressed.

[0100] The surface tension of the pretreatment liquid can be measured, for example, using an automatic surface tensiometer CBVP-Z (manufactured by Kyowa Interface Science Co., Ltd.) More specifically, the surface tension can be measured by reading the surface tension when a platinum plate is wetted with the pretreatment liquid in an environment of 25° C.

[0101] [1-2-1-7] Preparation method of pretreatment liquid The pretreatment liquid can be prepared by mixing the components in any order.

[0102] The mixture may be subjected to a process such as filtration as necessary to remove impurities and foreign matter.

[0103] The components may be mixed, for example, by sequentially adding the components to a vessel equipped with a stirring device such as a mechanical stirrer, a magnetic stirrer, etc., and stirring and mixing the components. Examples of the filtration method include centrifugal filtration and filter filtration.

[0104] [1-2-2] Adhesion conditions Examples of methods for applying the pretreatment liquid to a fabric include a dip coating method in which the fabric is immersed in the pretreatment liquid, a roller coating method in which the pretreatment liquid is applied using a mangle roller, a roll coater, or the like, a spray coating method in which the pretreatment liquid is sprayed using a spray device, or the like, and an inkjet coating method in which the pretreatment liquid is sprayed by an inkjet method. One or a combination of two or more selected from these methods can be used, but the roller coating method is preferred.

[0105] This increases the degree of freedom in designing the amount of pretreatment liquid applied, reduces problems during application, and enables the pretreatment liquid to be applied more uniformly to the fabric.

[0106] The amount of pretreatment liquid applied per unit area of ​​the fabric is 0.02 g / cm 2 More than 0.5g / cm 2 It is preferable that the density is 0.02 g / cm or less. 2 More than 0.3g / cm 2 More preferably, it is:

[0107] This allows the pretreatment liquid to be applied more uniformly to the fabric, and allows aggregation unevenness in the image on the printed product to be more effectively suppressed, thereby improving color development.

[0108] [1-3] Thermal transfer process In the thermal transfer process, a transfer medium on which an image has been formed using a sublimation transfer inkjet ink containing a disperse dye and water is placed opposite a fabric to which the pretreatment liquid has been applied in the pretreatment liquid application process described above, and the image is thermally transferred.

[0109] As a result, the disperse dye is transferred to the fabric that has been treated in the pretreatment liquid application step, and a printed item is obtained.

[0110] In this process, the transfer medium on which an image is formed by the sublimation transfer inkjet ink may be heated while facing the fabric to which the pretreatment liquid is applied. In this process, it is more preferable to heat the transfer medium and the fabric treated in the pretreatment liquid application process while they are in close contact with each other. This allows, for example, a clearer image to be recorded, i.e., dyed, on the fabric treated in the pretreatment liquid application process.

[0111] Examples of the heating method include steaming with steam, heat pressing with dry heat, thermosol, HT steamer with superheated steam, HP steamer with pressurized steam, etc., with dry heat being preferred.

[0112] This allows the fastness, texture, and color development of the printed product to be more suitably balanced.

[0113] The heating temperature in this step is preferably 160°C or higher and 220°C or lower, and more preferably 190°C or higher and 210°C or lower.

[0114] This makes it possible to reduce the energy required for transfer and improve the productivity of the printed matter, as well as the color development of the printed matter.

[0115] The heating time depends on the heating temperature, but is preferably from 30 seconds to 120 seconds, and more preferably from 40 seconds to 90 seconds.

[0116] This makes it possible to reduce the energy required for transfer and improve the productivity of the printed matter, as well as the color development of the printed matter.

[0117] The amount of sublimation ink that adheres to the fabric by transfer is 1.5 mg / cm per unit area of ​​the fabric. 2 More than 6.0mg / cm 2 It is preferable that:

[0118] This improves the color development of the image transferred to the fabric, while ensuring the drying properties of the sublimation transfer inkjet ink attached to the fabric, thereby reducing the occurrence of bleeding in the image.

[0119] The transfer medium used in the thermal transfer process has an image formed thereon by a sublimation inkjet ink containing a disperse dye and water.

[0120] An image is formed on a transfer medium by ejecting a sublimation transfer inkjet ink onto the transfer medium by an inkjet method.

[0121] [1-3-1] Transfer media As the transfer medium on which an image is formed by the sublimation transfer inkjet ink, for example, paper such as plain paper, a recording medium provided with an ink receiving layer, etc. can be used. The recording medium provided with the ink receiving layer is called, for example, inkjet paper, coated paper, etc. Among them, paper provided with an ink receiving layer containing inorganic particles such as silica is preferable. This makes it possible to obtain a transfer medium as an intermediate recording material in which the occurrence of bleeding on the recording surface is suppressed during the process in which the sublimation transfer inkjet ink applied to the transfer medium dries. Furthermore, with such a medium, the disperse dye is more easily retained on the surface of the recording surface, and the sublimation of the disperse dye can be more efficiently performed in the thermal transfer process.

[0122] [1-3-2] Sublimation inkjet ink The sublimation ink-jet inks used to form images on the transfer medium include disperse dyes and water.

[0123] When forming an image on a transfer medium, a plurality of types of sublimation inkjet inks may be used. This makes it possible, for example, to widen the color gamut that can be expressed.

[0124] [1-3-2-1] Disperse dye Dye-sublimation inkjet inks contain disperse dyes. This provides excellent color development to the fabric.

[0125] In the sublimation transfer inkjet ink, the disperse dye is usually in the form of particles and dispersed in the dispersion medium. The disperse dye is usually a non-ionic dye having a hydrophilic group and a moderate polar group. The disperse dye may be used alone or in combination of two or more kinds.

[0126] Examples of disperse dyes include CI Disperse Yellow, CI Disperse Red, CI Disperse Blue, CI Disperse Orange, CI Disperse Violet, CI Disperse Green, CI Disperse Brown, and CI Disperse Black.

[0127] More specifically, for example, CI Disperse Yellow 3, 7, 8, 23, 39, 51, 54, 60, 71, 86; CI Disperse Red 11, 50, 53, 55, 55:1, 59, 60, 65, 70, 75, 93, 146, 158, 190, 190:1, 207, 239, 240; CI Disperse Blue 14, 19, 26, 26:1, 35, 5 5, 56, 58, 64, 64:1, 72, 72:1, 81, 81:1, 91, 95, 108, 131, 141, 145, 359; CI Disperse Orange 1, 1:1, 5, 20, 25, 25:1, 33, 56, 76; CI Disperse Violet 8, 17, 23, 27, 28, 29, 36, 57; and CI Disperse Brown 2.

[0128] In the present invention, cyan dyes, red dyes, and yellow dyes are preferred because they provide better dyeability to the fabric to which the pretreatment liquid is attached, and a printed product having sufficient color development is obtained. As the cyan dye, CI Disperse Blue 359 is more preferred because they provide even better dyeability and a printed product having sufficient color development is obtained. As the red dye, CI Disperse Red 60 is more preferred. As the yellow dye, CI Disperse Yellow 54 is more preferred.

[0129] The content of the disperse dye in the sublimation transfer inkjet ink is preferably 0.05% by mass or more and 20% by mass or less.

[0130] [1-3-2-2]Water Dye-sublimation inkjet inks contain water.

[0131] Water is the main component that imparts fluidity to the sublimation inkjet ink. After the sublimation inkjet ink is applied to the transfer medium, most of the water evaporates and dissipates.

[0132] Examples of water include pure water such as ion-exchanged water, ultrafiltered water, reverse osmosis water, distilled water, and ultrapure water from which ionic impurities have been removed as much as possible. Water sterilized by ultraviolet irradiation, addition of hydrogen peroxide, or the like is preferred because it can suppress the growth of mold and bacteria when the sublimation transfer inkjet ink is stored for a long period of time.

[0133] The water content in the sublimation transfer inkjet ink is preferably 30.0% by mass or more and 80.0% by mass or less.

[0134] [1-3-2-3] Dispersants The sublimation ink-jet ink may further comprise a dispersant.

[0135] This improves the dispersibility of the disperse dye, and improves the storage stability of the sublimation transfer inkjet ink and the ejection stability by the inkjet method.

[0136] Examples of dispersants include sodium naphthalenesulfonate-formaldehyde condensates and resins.

[0137] Sodium naphthalenesulfonate-formaldehyde condensation product is a compound or its salt obtained by formalin condensation of a sulfonated compound having a naphthalene ring in the molecule. The dispersant may be used alone or in combination of two or more kinds.

[0138] When a resin is contained as a dispersant, examples of the resin include urethane-based resins, styrene-acrylic resins, acrylic resins, fluorene-based resins, polyolefin-based resins, rosin-modified resins, terpene-based resins, polyester-based resins, polyamide-based resins, epoxy-based resins, vinyl chloride-vinyl chloride-vinyl acetate copolymers, ethylene-vinyl acetate-based resins, and the like. One or a combination of two or more selected from these can be used, and among these, urethane-based resins and styrene-acrylic resins are preferred, with styrene-acrylic resins being more preferred.

[0139] This further improves the dispersibility of the disperse dye, and further improves the storage stability of the sublimation transfer inkjet ink and the ejection stability by the inkjet method.

[0140] The urethane resin is not particularly limited as long as it is a resin having a urethane bond in the molecule. For example, the urethane resin includes a polyether type urethane resin having an ether bond in the main chain other than the urethane bond, a polyester type urethane resin having an ester bond in the main chain, and a polycarbonate type urethane resin having a carbonate bond in the main chain. The urethane resin may be used alone or in combination of two or more types.

[0141] As the urethane-based resin, commercially available products can be used, such as Takelac (registered trademark) W6110 (product name) manufactured by Mitsui Chemicals, Inc., Acrit (registered trademark) WBR-022U (product name) manufactured by Taisei Fine Chemical Co., Ltd., Permarin (registered trademark) UX-368T (product name), Euprene (registered trademark) UXA-307 (product name), and U-coat (registered trademark) UWS-145 (product name) manufactured by Sanyo Chemical Industries, Ltd., and Solsverse (registered trademark) 47000 (product name) manufactured by Lubrizol Corporation.

[0142] Examples of styrene-acrylic resins include styrene-acrylic acid copolymers, styrene-methacrylic acid copolymers, styrene-methacrylic acid-acrylate copolymers, styrene-α-methylstyrene-acrylic acid copolymers, styrene-α-methylstyrene-acrylic acid-acrylate copolymers, etc. These copolymers may have any of the forms of random copolymers, block copolymers, alternating copolymers, and graft copolymers.

[0143] As the styrene-acrylic resin, commercially available products can be used, such as JONCRYL (registered trademark) 67 (product name) manufactured by BASF Japan Ltd. and Solsverse (registered trademark) 43000 (product name) manufactured by Lubrizol Corporation.

[0144] The content of the dispersant in the sublimation transfer inkjet ink is preferably 3.0% by mass or more and 8.0% by mass or less.

[0145] [1-3-2-4] Surfactants The sublimation inkjet ink may further contain a surfactant.

[0146] Examples of the surfactant include acetylene glycol surfactants, fluorine-based surfactants, silicone-based surfactants, etc. The surfactants may be used alone or in combination of two or more kinds.

[0147] Examples of the acetylene glycol surfactant include 2,4,7,9-tetramethyl-5-decyne-4,7-diol and its alkylene oxide adducts, and 2,4-dimethyl-5-decyne-4-ol and its alkylene oxide adducts.

[0148] The acetylene glycol surfactant may be a commercially available product, such as Olfine (registered trademark) 104 series (product name) and E series (product name) manufactured by Nissin Chemical Industry Co., Ltd., or Surfynol (registered trademark) series (product name) manufactured by Air Products and Chemicals Inc.

[0149] Examples of the fluorine-based surfactant include perfluoroalkyl sulfonates, perfluoroalkyl carboxylates, perfluoroalkyl phosphates, perfluoroalkyl ethylene oxide adducts, perfluoroalkyl betaines, and perfluoroalkyl amine oxide compounds.

[0150] As the fluorine-based surfactant, commercially available products can also be used, such as S-144 (trade name) and S-145 (trade name) manufactured by Asahi Glass Co., Ltd.

[0151] Examples of silicone surfactants include polysiloxane compounds and polyether-modified organosiloxanes.

[0152] As the silicone surfactant, commercially available products can be used, such as BYK (registered trademark) series 306, 307, 333, 341, 345, 346, 347, 348, and 349 (all trade names) manufactured by BYK Japan.

[0153] The content of the surfactant in the sublimation transfer inkjet ink is preferably 0.5% by mass or more and 5.0% by mass or less.

[0154] [1-3-2-5] Water-soluble organic solvents The sublimation transfer inkjet ink may further contain a water-soluble organic solvent.

[0155] Examples of the water-soluble organic solvent include glycerin; glycols such as ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, 1,3-propanediol, 1,2-butanediol, 1,2-pentanediol, 1,2-hexanediol, 1,4-butanediol, 1,5-pentanediol, and 1,6-hexanediol; ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, and propylene glycol monomethyl ether. Examples of the glycol monoethers include propylene glycol monoethyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, and triethylene glycol monomethyl ether; nitrogen-containing solvents such as 2-pyrrolidone, N-methyl-2-pyrrolidone, and N-ethyl-2-pyrrolidone; and alcohols such as methanol, ethanol, n-propyl alcohol, isopropyl alcohol, n-butanol, 2-butanol, tert-butanol, iso-butanol, n-pentanol, 2-pentanol, 3-pentanol, and tert-pentanol. The water-soluble organic solvent may be used alone or in combination of two or more kinds.

[0156] Glycerin, glycols, and glycol monoethers can function primarily as penetrating solvents and humectants. Glycol monoethers tend to have stronger penetrating solvent properties, while glycerin and glycols tend to have stronger humectant properties.

[0157] The content of the water-soluble organic solvent in the sublimation transfer inkjet ink is preferably 5.0% by mass or more and 30.0% by mass or less.

[0158] [1-3-2-6] Other ingredients The sublimation transfer inkjet ink may further contain components other than those described above. Hereinafter, such components will be referred to as "other components" in this section.

[0159] Examples of other components include dissolution aids, viscosity adjusters, pH adjusters, antioxidants, preservatives, fungicides, corrosion inhibitors, and chelating agents.

[0160] However, the content of other components in the sublimation transfer inkjet ink is preferably 10.0% by mass or less, more preferably 7.0% by mass or less, and even more preferably 5.0% by mass or less.

[0161] [1-3-3] Preparation method of sublimation inkjet ink The sublimation transfer inkjet ink can be prepared by mixing the disperse dye, water, and, if necessary, other ingredients in any order.

[0162] The mixture may be subjected to a process such as filtration as necessary to remove impurities and foreign matter.

[0163] The components may be mixed, for example, by sequentially adding the components to a vessel equipped with a stirring device such as a mechanical stirrer, a magnetic stirrer, etc., and stirring and mixing the components. Examples of the filtration method include centrifugal filtration and filter filtration.

[0164] [2] Textile printing Next, the printed matter according to the present invention will be described. The printed textile according to the present invention is produced by using the above-mentioned textile printing method according to the present invention.

[0165] The printed textile product according to the present invention has excellent color development and texture. In particular, since the printing method of the present invention can suitably print various fabrics, the printed textile product according to the present invention can exhibit excellent color development while making use of the texture, texture, etc. of various fabrics.

[0166] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these.

[0167] For example, the textile printing method of the present invention may further include other steps in addition to the above-mentioned pretreatment liquid application step and thermal transfer step, such as a pretreatment step carried out on the fabric before the pretreatment liquid application step, an intermediate treatment step carried out between the pretreatment liquid application step and the thermal transfer step, and a posttreatment step carried out after the thermal transfer step. EXAMPLES

[0168] Next, specific examples of the present invention will be described, but the present invention is not limited to the following examples.

[0169] [3] Preparation of pretreatment solution (Preparation example A1) The components were placed in a mixing tank and mixed and stirred for 2 hours using a stirrer. After that, the mixture was filtered through a membrane filter with a pore size of 5 μm to obtain a pretreatment liquid with the composition shown in Figure 1.

[0170] (Preparation examples A2 to A6) A pretreatment liquid was prepared in the same manner as in Preparation Example A1, except that the types and amounts of the components used were adjusted to obtain the composition shown in FIG.

[0171] In FIG. 1, the numerical values ​​of each component indicate the content in mass %. The components shown in FIG. 1 are as follows:

[0172] (polyester resin) KT-8803: Solid content of Elitail (registered trademark) KT-8803 (product name, manufactured by Unitika Ltd., solid content: 30% by mass, glass transition temperature Tg: 65°C) KT-8701: Solid content of Elitail (registered trademark) KT-8701 (product name, manufactured by Unitika Ltd., solid content: 30 mass, glass transition temperature Tg: 15°C)

[0173] (Crosslinking agent) #220: Solid content of Fixer #220 (product name, manufactured by Murayama Chemical Laboratory, isocyanate group-containing compound with an isocyanurate skeleton in the structure, solid content: 40% by mass) K-2035E: Epocross (registered trademark) K-2035E (product name, manufactured by Nippon Shokubai Co., Ltd., oxazoline group-containing compound, solid content: 40% by mass)

[0174] [4] Preparation of sublimation inkjet ink (Preparation example B1) The components were placed in a mixing tank and mixed and stirred for 2 hours using a stirrer. After that, the mixture was filtered through a membrane filter with a pore size of 1 μm to obtain a sublimation transfer inkjet ink with the composition shown in Figure 2.

[0175] In FIG. 2, the numerical values ​​of each component indicate the content in mass %. The components shown in FIG. 2 are as follows:

[0176] (disperse dye) DB359: CI Disperse Blue 359 (commercial product)

[0177] (Surfactant) BYK(R)-348: BYK(R)-348 (trade name, silicone surfactant, manufactured by BYK Japan)

[0178] [5] Manufacturing of printed materials Example 1 Using the pretreatment liquid prepared in Preparation Example A1, a fabric having a pretreatment liquid attached thereto was obtained as follows. That is, cotton fabric having a water absorbency of 0.9 [s] was immersed in the pretreatment liquid, and the amount of polyester resin contained in the pretreatment liquid attached to the fabric was 10 [g / m 2 The pretreatment liquid was applied to the fabric using a mangle roller so that the fabric was heated at a temperature of 200° C. and a pressure of 4.2 N / cm using a heat press machine TP-608M (trade name, manufactured by Taiyo Seiki Co., Ltd.). 3 The cloth was dried under the conditions of 100° C. to obtain a cloth having the pretreatment liquid adhered thereto.

[0179] On the other hand, a transfer medium on which an image was formed by the sublimation inkjet ink prepared in Preparation Example B1 was obtained as follows. That is, the sublimation inkjet ink was filled into the cartridge of an inkjet printer PX-G930 (product name, manufactured by Seiko Epson Corporation). Then, the ink was applied to the surface of the coated paper (TRANSJET Sportline1254 (product name), manufactured by Chem Paper Co., Ltd.) as the transfer medium, on which a coating layer was provided, at a resolution of 720 dpi x 720 dpi, with an ink ejection amount of 12 mg / inch at 100% duty. 2 An image having a solid pattern was formed by applying the ink under the conditions of (a) to (c) above. This resulted in a transfer medium on which an image was formed by the sublimation transfer inkjet ink.

[0180] The surface of the transfer medium on which the image was formed was placed opposite the fabric to which the pretreatment liquid was applied, and the two were then heated at a temperature of 200° C. and a pressure of 4.2 N / cm using a heat press machine TP-608M (trade name, manufactured by Taiyo Seiki Co., Ltd.). 3 The dye was thermally transferred under the conditions of 100 s, 60 s to obtain a printed item.

[0181] (Examples 2 to 22) The type of pretreatment liquid, the fabric conditions, and the amount of polyester resin attached to the fabric [g / m 2 A printed item was produced in the same manner as in Example 1, except that the color of the dye was changed to that shown in Figs.

[0182] (Comparative Examples 1 to 9) The type of pretreatment liquid, the fabric conditions, and the amount of polyester resin attached to the fabric [g / m 2 A printed item was produced in the same manner as in Example 1, except that the color of the dye was changed to that shown in FIG.

[0183] [6] Evaluation The printed products according to the above-mentioned respective Examples and Comparative Examples were evaluated as follows.

[0184] [6-1] Color development For each of the printed textiles in each of the above examples and comparative examples immediately after production, the OD value of the recorded surface of the printed textile, i.e., the surface that faced the transfer medium when the printed textile was produced, was measured using a spectrodensitometer FD-7 (manufactured by Konica Minolta) under conditions of a D65 light source and a viewing angle of 2 degrees, and evaluated according to the following criteria.

[0185] A: The OD value of the recording surface is 1.1 or more. B: The OD value of the recording surface is 1.0 or more and less than 1.1. C: The OD value of the recording surface is 0.9 or more and less than 1.0. D: The OD value of the recording surface is 0.8 or more and less than 0.9. E: The OD value of the recording surface is less than 0.8.

[0186] [6-2] Texture The texture of the printed textiles according to each of the Examples and Comparative Examples was evaluated by a sensory test. Specifically, five judges randomly evaluated the obtained printed textiles as "comparable to the original tactile feel of the fabric" or "the printed textile is stiff and the original tactile feel of the fabric is impaired," and the texture was evaluated based on the results and the following evaluation criteria. If the evaluation result is B or higher, it can be said that the texture is excellent.

[0187] A: Five judges answered that it was comparable to the original feel of the fabric. B: Four judges answered that the feel was comparable to the original feel of the fabric. C: Three judges answered that the feel was comparable to that of the original fabric. D: Two or one judges answered that the feel was comparable to the original feel of the fabric. E: None of the judges answered that the feel was comparable to the original feel of the fabric.

[0188] [6-3] Fading over time The D65 light source was continued to be irradiated for an additional 24 hours after the OD value measurement in [6-1] above.

[0189] After that, the OD value of each of these printed items was measured under the same conditions as described in [6-1] above.

[0190] The OD value measured in [6-1] above was defined as OD0, and the OD value measured immediately after continuing to expose the sample to light from the D65 light source for an additional 24 hours after the OD value measurement in [6-1] above was defined as OD1. The fading rate over time [%], expressed as {(OD1 / OD0)-1} x 100, was calculated and evaluated according to the following criteria.

[0191] A: The fading rate over time is -1% or more. B: The rate of fading over time is -2% or more and less than -1%. C: The fading rate over time is -4% or more and less than -2%. D: The fading rate over time is -6% or more and less than -4%. E: The fading rate over time is less than -6%.

[0192] These results are shown together in FIG. 3 and FIG. 4 together with the production conditions of the printed products according to each of the Examples and Comparative Examples.

[0193] In addition, in Figs. 3 and 4, "F1" is a cotton T-shirt fabric with a water absorbency of 0.9[s]. "F2" is a cotton T-shirt fabric with a water absorbency of 1.3[s]. A cotton broadcloth fabric with a water absorbency of 5.4[s] was designated as "F3."

[0194] As is clear from Figures 3 and 4, excellent results were obtained in each of the Examples, whereas satisfactory results were not obtained in each of the Comparative Examples.

[0195] In addition, printed items were produced in the same manner as in each of the above Examples, except that the content of the crosslinking agent in the pre-treatment liquid was changed in various ways within the range of 0.1 mass % or more and 5.0 mass % or less, and the same evaluations as above were carried out on these items, and the same results as above were obtained.

Claims

1. a pretreatment liquid application step of applying a pretreatment liquid to the fabric; a thermal transfer step of thermally transferring an image formed on a transfer medium using a sublimation transfer ink containing a disperse dye and water to the fabric having the pretreatment liquid applied thereto, the thermal transfer step being performed by placing the fabric face-to-face with the transfer medium on which an image has been formed using a sublimation transfer ink containing a disperse dye and water, The pretreatment liquid contains a polyester resin, a crosslinking agent, and water, JIS L 1907: 2010 7.1.3 The water absorbency [s] of the fabric obtained by the sedimentation method and the adhesion amount [g / m] of the polyester resin to the fabric ２ ] is 8.0 [s g / m ２ ] or more 16.0 [s・g / m ２ In the pretreatment liquid application step, the pretreatment liquid is applied to the fabric so that:

2. The textile printing method according to claim 1, wherein the polyester resin has a glass transition point of 25° C. or higher.

3. The textile printing method according to claim 1 or 2, wherein the crosslinking agent is an isocyanate group-containing compound.

4. The textile printing method according to claim 1 , wherein the pretreatment liquid further contains an organic solvent.

5. The textile printing method according to claim 1 or 2, wherein the fabric contains fibers made of a material having a hydroxyl group.

6. The textile printing method according to claim 1 or 2, wherein a content of the polyester resin in the pretreatment liquid is 1.0% by mass or more and 20.0% by mass or less.

7. The textile printing method according to claim 1 or 2, wherein a content of the crosslinking agent in the pretreatment liquid is from 0.1% by mass to 5.0% by mass.

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