Inkjet recording method and inkjet ink set

Abstract

To provide an inkjet recording method that enables obtaining recorded matter having excellent color development and touch.SOLUTION: An inkjet recording method comprises: a first discharge process of discharging a first ink on a fabric, the first ink not including a coloring material or including 0.1 mass% or less of the same and including polyester particles having a glass transition temperature of 0°C or higher; a second discharge process of discharging a second ink on a fabric, the second ink not including a coloring material or including 0.1 mass% or less of the same and including a cross-linking agent; and a third discharge process of discharging a third ink on a fabric, the third ink including a sublimable coloring material, where the discharge quantity, X, of the first ink is 0.60 mg / cm2 or less in terms of solid content and the discharge quantity, Y, of the second ink is 0.15 mg / cm2 or less in terms of solid content.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an inkjet recording method and an inkjet ink set.

Background Art

[0002] The inkjet recording method can record high-definition images with a relatively simple device and has been rapidly developed in various fields. In the inkjet recording method, a processing liquid may be used for recording. For example, Patent Document 1 describes a processing liquid composition used by attaching it to a fabric, which contains polyester particles having a glass transition temperature of 40°C or higher, a crosslinking agent, and water, and the fabric contains fibers having a hydroxyl group, and a processing liquid composition for dye resist printing is described.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the inkjet recording method, it is difficult to achieve both color development property and texture in the obtained recorded matter. For example, when a pretreatment liquid is applied to a fabric in a non-demand manner such as roller coating, the texture of the non-coated surface tends to be inferior. There is a demand for an inkjet recording method capable of obtaining a recorded matter excellent in color development property and texture.

Means for Solving the Problems

[0005] The inkjet recording method of the present invention includes a first ejection step of ejecting a first ink containing polyester particles that do not contain a coloring material or contain 0.1% by mass or less and have a glass transition temperature of 0°C or higher onto a fabric, a second ejection step of ejecting a second ink that does not contain a coloring material or contains 0.1% by mass or less and contains a crosslinking agent onto the fabric, and a third ejection step of ejecting a third ink containing a sublimable coloring material onto the fabric. The ejection amount X of the first ink is 0.60 mg / cm 2 or less in terms of solid content, and the ejection amount Y of the second ink is 0.15 mg / cm 2 or less in terms of solid content.

[0006] The inkjet ink set of the present invention includes a first ink, a second ink, and a third ink used in the inkjet recording method of the present invention.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Modes for Carrying Out the Invention

[0008] Hereinafter, embodiments of the present invention (hereinafter referred to as "the present embodiment") will be described in detail with reference to the drawings as necessary. However, the present invention is not limited to this, and various modifications are possible without departing from the gist thereof.

[0009] 1. Inkjet Recording Method The inkjet recording method of the present embodiment includes a first ejection step of ejecting a first ink containing polyester particles that do not contain a coloring material or contain 0.1% by mass or less and have a glass transition temperature of 0°C or higher onto a fabric, a second ejection step of ejecting a second ink that does not contain a coloring material or contains 0.1% by mass or less and contains a crosslinking agent onto the fabric, and a third ejection step of ejecting a third ink containing a sublimable coloring material onto the fabric. The ejection amount X of the first ink is 0.60 mg / cm 2is as follows, and the discharge amount Y of the second ink is 0.15 mg / cm in terms of solid content 2 or less.

[0010] The inkjet recording method of this embodiment can obtain a recording material excellent in color developability and texture. According to the inkjet recording method of this embodiment, cotton can be dyed using a sublimation dye. By applying polyester particles and a crosslinking agent on demand, the pretreatment liquid is applied only to the printed surface, so the non-printed surface can maintain the texture of the original fabric. Also, by separating the first ink and the second ink, the color developability and texture can be arbitrarily controlled, so a fabric that meets the required performance can be obtained.

[0011] 1.1. First discharge step The first discharge step is a step of discharging a first ink containing polyester particles that do not contain a coloring material or contain 0.1 mass% or less thereof and have a glass transition temperature of 0°C or higher onto a fabric. In the first discharge step, the first ink is discharged onto the fabric by an inkjet method.

[0012] The discharge amount X of the first ink is 0.60 mg / cm in terms of solid content 2 or less. Thereby, a recording material excellent in texture tends to be obtained. From the above viewpoints, the discharge amount X of the first ink is preferably 0.55 mg / cm or less in terms of solid content, 2 more preferably 0.50 mg / cm or less, 2 even more preferably 0.45 mg / cm or less, 2 and most preferably 0.40 mg / cm or less. The discharge amount X of the first ink is more preferably 0.05 mg / cm or more in terms of solid content from the viewpoint of obtaining a recording material excellent in color developability, 2 even more preferably 0.10 mg / cm or more, 2 and most preferably 0.15 mg / cm or more.

[0013] The discharge amount X of the first ink is 0.03 mg / cm or more and 0.50 mg / cm or less in terms of solid content 2 in terms of solid content. 2The following are also preferable.

[0014] 1.1.1. First Ink The first ink contains no coloring material or contains 0.1 mass% or less thereof, contains polyester particles having a glass transition temperature of 0°C or higher, and may contain, if necessary, a humectant, a penetrant, a surfactant, water, and the like. Further, it preferably contains no crosslinking agent or contains 0.1 mass% or less thereof. By containing no crosslinking agent or containing 0.1 mass% or less thereof, it becomes easier to arbitrarily control the color development property and the texture, and it becomes easier to obtain a fabric that meets the required performance.

[0015] 1.1.1.1. Polyester Particles The first ink contains polyester particles having a glass transition temperature of 0°C or higher. By including polyester particles having a glass transition temperature of 0°C or higher in the first ink, a recording material having sufficient color development property and excellent fading resistance can be obtained.

[0016] The polyester particles have a glass transition temperature of 0°C or higher. Thereby, when the fabric to which the first ink is attached is subjected to resist printing, a recording material having more sufficient color development property, fading resistance, and fastness can be obtained. From the above viewpoints, the glass transition temperature of the polyester particles is preferably 20°C or higher, more preferably 40°C or higher, and even more preferably 60°C or higher. The glass transition temperature of the polyester particles may be, for example, 180°C or lower, 150°C or lower, or 120°C or lower.

[0017] In the present embodiment, the glass transition temperature of the polyester particles can be measured, for example, by a differential scanning calorimeter (hereinafter also referred to as "DSC").

[0018] The polyester particles are not particularly limited as long as the glass transition temperature is 0°C or higher. The polyester particles have, for example, structural units derived from polyvalent carboxylic acids and structural units derived from polyhydric alcohols.

[0019] Examples of the 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. Examples of the salts include potassium salts, sodium salts, calcium salts, and magnesium salts.

[0020] Examples of the 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 dimethylol ethyl sulfonate, potassium dimethylol ethyl sulfonate, and potassium dimethylolpropionate.

[0021] The polyester particles preferably contain hydroxyl groups, carboxyl groups, sulfonic acid groups, and sodium salts thereof. These groups may be contained singly or in combination of two or more in the polyester particles.

[0022] The sulfonic acid group-containing polyester particles have, for example, structural units derived from a polyvalent carboxylic acid, structural units derived from a polyhydric alcohol, and structural units derived from a sulfonic acid-containing aromatic monomer. Examples of the sulfonic acid-containing aromatic monomer include 5-sulfoisophthalic acid, sulfoterephthalic acid, 4-sulfophthalic acid, 4-sulfonaphthalene-2,7-dicarboxylic acid, and 4-sulfo-1,8-naphthalenedicarboxylic anhydride, and salts thereof. As the salt, the above may be referred to, and a sodium salt is preferable.

[0023] By the polyester particles containing these groups, the polyester particles can react well with a crosslinking agent, and the adhesion to a fabric containing a fiber having a hydroxyl group becomes good. Therefore, it becomes possible to obtain a recording material having more sufficient color developability, color fading resistance, and fastness.

[0024] Since it has more sufficient color developability and more excellent color fading resistance, it is preferable that the polyester particles contain a hydrophobic portion such as an aromatic group in its structure.

[0025] The polyester particles can be obtained, for example, by appropriately selecting one or more from the above polyvalent carboxylic acid, polyhydric alcohol, and, if necessary, sulfonic acid-containing aromatic monomer, and synthesizing them by a conventional polycondensation reaction.

[0026] As such polyester particles, commercially available products can also be used. Examples of the commercially available products include Plascote (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 (above, trade names, manufactured by Gohsei Chemical Industry Co., Ltd.); Bayronal (registered trademark) MD-1200, MD-1500, and MD-2000 (above, trade names, manufactured by Toyobo Co., Ltd.).

[0027] The polyester particles may be used alone or in combination of two or more.

[0028] Since a recording material having more sufficient coloring property, fading and discoloration resistance, and fastness can be obtained, the content of the polyester particles is preferably 1.0% by mass to 50.0% by mass, more preferably 5.0% by mass to 40.0% by mass, and still more preferably 10.0% by mass to 35.0% by mass in terms of solid content based on the total amount of the first ink.

[0029] 1.1.1.2. Colorant The first ink contains no colorant or contains 0.1% by mass or less, and preferably contains no colorant. The colorant is not particularly limited, but a disperse dye is preferred. Disperse dyes are usually colorants that form particles and are dispersed by a dispersant in a dispersion medium. Also, disperse dyes are usually nonionic dyes having a hydrophilic group and an appropriate polar group. The disperse dyes may be used alone or in combination of two or more.

[0030] Examples of the disperse dyes include C.I. Disperse Yellow, C.I. Disperse Red, C.I. Disperse Blue, C.I. Disperse Orange, C.I. Disperse Violet, C.I. Disperse Green, C.I. Disperse Brown, and C.I. Disperse Black.

[0031] 1.1.1.3. Humectant The humectant is not particularly limited as long as it is generally used in inkjet inks, and a high-boiling organic solvent may be used. The boiling point of the humectant is preferably 180°C or higher, more preferably 200°C or higher. By having the boiling point within the above range, good water retention and wettability can be imparted to the first ink.

[0032] The humectant is not particularly limited. For example, ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, pentamethylene glycol, trimethylene glycol, 2-butene-1,4-diol, 2-ethyl-1,3-hexanediol, 2-methyl-2,4-pentanediol, tripropylene glycol, polyethylene glycol with a number average molecular weight of 2000 or less, 1,3-propylene glycol, isopropyl glycol, isobutylene glycol, glycerin, meso-erythritol, and pentaerythritol can be mentioned.

[0033] 1.1.1.4. Penetrant The penetrant is not particularly limited as long as it is generally used in inks for inkjet. By using a penetrant, the ink can quickly penetrate into the fabric, and a recording material with less bleeding of the image can be obtained.

[0034] The penetrant is not particularly limited. For example, 1,2-pentanediol and 1,2-hexanediol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,7-heptanediol, and 1,8-octanediol can be mentioned.

[0035] 1.1.1.5. Surfactant The surfactant will be described in detail together in the third ink.

[0036] 1.1.2. Fabric The fabric according to this embodiment is not particularly limited, but preferably contains fibers having a hydroxyl group. When it contains fibers having a hydroxyl group, the hydroxyl group, the crosslinking agent, and the polyester particles having a glass transition temperature of 0°C or higher strongly bond to the hydroxyl group of the fabric, resulting in excellent color development and fastness. Examples of fibers having a hydroxyl group include natural fibers such as cotton, hemp, wool, and silk; synthetic fibers such as polypropylene, polyester, acetate, triacetate, polyamide, and polyurethane, which have a hydroxyl group in their structure; biodegradable fibers such as polylactic acid, etc. Further, the fibers having a hydroxyl group may be blended fibers of these. Simply, a recording material having more sufficient color developability, color fading and discoloration resistance, and fastness, having good texture, and further having reduced yellowing can be obtained. Therefore, as the fabric, cotton is preferable.

[0037] Examples of the form of the fabric include woven fabrics, knitted fabrics, non-woven fabrics, cloths, and clothing and other ornaments. Clothing and other ornaments include T-shirts, handkerchiefs, scarves, towels, tote bags, cloth bags, curtains, sheets, bed covers, and furniture such as wallpaper after sewing; cloths before and after cutting as parts before sewing. These forms include long ones wound in a roll shape, those cut to a predetermined size, and those in a product shape.

[0038] 1.2. Second discharging step The second discharging step is a step of discharging a second ink that does not contain a coloring material or contains 0.1% by mass or less of a coloring material and contains a crosslinking agent onto the fabric. In the second discharging step, the second ink is discharged onto the fabric by an inkjet method.

[0039] The discharge amount Y of the second ink is 0.15 mg / cm in terms of solid content 2 or less. Thereby, a recording material excellent in texture tends to be obtained. From the above viewpoints, the discharge amount Y of the second ink is preferably 0.13 mg / cm in terms of solid content 2 or less, more preferably 0.115 mg / cm 2 or less, and even more preferably 0.80 mg / cm 2 or less.

[0040] The discharge amount Y of the second ink is 0.01 mg / cm in terms of solid content 20.115 mg / cm or less 2 It is also preferably below the above value.

[0041] Further, with respect to the discharge amount X (mg / cm 2 ) of the first ink in terms of solid content, the ratio (Y / X) of the discharge amount Y (mg / cm 2 ) of the second ink in terms of solid content is preferably 0.05 or more and 4.00 or less, more preferably 0.08 or more and 2.00 or less, and even more preferably 0.10 or more and 1.00 or less, from the viewpoint of achieving both color development property and texture.

[0042] 1.2.1. Second Ink The second ink contains no coloring material or contains 0.1 mass% or less thereof, contains a crosslinking agent, and may contain, if necessary, a humectant, a penetrant, a surfactant, and water. Further, it is preferably free of polyester particles having a glass transition temperature of 0°C or higher or contains 0.1 mass% or less thereof. By being free of polyester particles having a glass transition temperature of 0°C or higher or containing 0.1 mass% or less thereof, it becomes easier to arbitrarily control the color development property and texture, and it becomes easier to obtain a fabric that meets the required performance. 1.2.1.1. Crosslinking Agent By including a crosslinking agent in the second ink, crosslinkability can be imparted, and polyester particles, a coloring material, and a fabric can be bound together. Therefore, a recording material having sufficient color development property and excellent color fading resistance while also having excellent fastness can be obtained.

[0043] As the crosslinking agent, it can be appropriately selected from known crosslinking agents and may be one that starts a crosslinking reaction at room temperature or one that starts a crosslinking reaction by heat. Examples of such crosslinking agents include crosslinking agents having self-crosslinkability, compounds having a plurality of functional groups that react with an unsaturated carboxylic acid component in the molecule, and metals having polyvalent coordination sites.

[0044] Since a recording material having more sufficient color development property, fading property, and fastness can be obtained, it is preferable that the crosslinking agent contains an isocyanate group and / or an oxazoline group.

[0045] As the crosslinking agent containing an isocyanate group, a crosslinking agent containing a blocked isocyanate group is preferable. Examples of the crosslinking agent containing an isocyanate group include, for example, a water-dispersible (blocked) polyisocyanate. Note that (blocked) polyisocyanate means polyisocyanate and / or blocked polyisocyanate.

[0046] Examples of the water-dispersible polyisocyanate include those obtained by dispersing a polyisocyanate imparted with hydrophilicity by a polyethylene oxide chain in water with an anionic dispersant or a nonionic dispersant.

[0047] Examples of the polyisocyanate include diisocyanates such as hexamethylene diisocyanate and isophorone diisocyanate; derivatives (modified products) of polyisocyanates such as trimethylolpropane adducts, biuret bodies, and isocyanurate bodies of these diisocyanates. These polyisocyanates may be used alone or in combination of two or more.

[0048] The water-dispersible blocked polyisocyanate is obtained by blocking the isocyanate groups 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.

[0049] As such a crosslinking agent containing an isocyanate group, commercially available products can also be used. Examples of commercially available products include Fixer #100ECO, #104EA, #220, 70ECO, #70, #410, and #400 (above are product names, Murayama Chemical Laboratory Co., Ltd.); Elastron (registered trademark) BN-11, BN-27, BN-69, and BN-77 (above are product names, Daiichi Kogyo Seiyaku Co., Ltd.).

[0050] Examples of the crosslinking agent containing an oxazoline group 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), 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, and oxazoline ring-containing polymers. These oxazoline group-containing compounds may be used alone or in combination of two or more.

[0051] Since it is possible to more firmly bind polyester particles, coloring materials, and fabrics, and a recording material having more excellent fastness can be obtained, a water-soluble oxazoline group-containing compound is preferred as the oxazoline group-containing compound.

[0052] As such a crosslinking agent containing an oxazoline group, commercially available products can also be used. Examples of commercially available products include Epocros (registered trademark) K-2010, K-2020, K-2030, K-2035E, WS-300, WS-500, and WS-700 (above are product names, Nippon Shokubai Co., Ltd.).

[0053] The crosslinking agent may be used alone or in combination of two or more kinds.

[0054] Since a recording material having more sufficient color development property, fading and discoloration resistance, and fastness can be obtained, the content of the crosslinking agent is preferably 0.1 to 15.0% by mass, more preferably 2.0 to 13.0% by mass, and even more preferably 5.0 to 10.0% by mass in terms of solid content based on the total amount of the second ink.

[0055] 1.2.1.2. Colorant The second ink contains no colorant or contains 0.1% by mass or less, and preferably contains no colorant. The colorant is not particularly limited, but a disperse dye is preferred. Details such as specific examples and preferred specific examples of the disperse dye are the same as those of the disperse dye described in the section of 1.1.1.2. Disperse dye above.

[0056] 1.2.1.3. Other components Examples of the humectant and penetrant in the second ink are the same as those exemplified in the first ink. Also, the surfactants will be described in detail in the third ink.

[0057] 1.3. Third ejection step The third ejection step is a step of ejecting the third ink containing the sublimable colorant onto the fabric.

[0058] 1.3.1. Third ink The third ink contains a sublimable colorant and may contain a dispersant, a surfactant, a humectant, a water-soluble organic solvent, and water as necessary. Here, the "sublimable colorant" refers to a colorant having the property of subliming by heating. As the sublimable colorant, a sublimable dye is preferred.

[0059] 1.3.1.1. Sublimable colorant As sublimable dyes, specifically, C.I. Disperse Yellow 3, 7, 8, 23, 39, 51, 54, 60, 71, and 86; C.I. Disperse Orange 1, 1:1, 5, 20, 25, 25:1, 33, 56, and 76; C.I. Disperse Brown 2; C.I. Disperse Red 11, 50, 53, 55, 55:1, 59, 60, 65, 70, 75, 93, 146, 158, 190, 190:1, 207, 239, and 240; C.I. Vat Red 41; C.I. Disperse Violet 8, 17, 23, 27, 28, 29, 36, and 57; C.I. Disperse Blue 14, 19, 26, 26:1, 35, 55, 56, 58, 64, 64:1, 72, 72:1, 81, 81:1, 91, 95, 108, 131, 141, 145, and 359; C.I. Solvent Blue 36, 63, 105, and 111, etc. may be mentioned.

[0060] In this embodiment, since better dyeability can be obtained and a recording material having sufficient color developability can be obtained, cyan dyes, red dyes, and yellow dyes are preferred, and red dyes are more preferred. Since even better dyeability can be obtained and a recording material having sufficient color developability can be obtained, as the red dye, C.I. Disperse Red 60 is even more preferred.

[0061] From the viewpoint of more effectively and surely achieving the operational effects of this embodiment, the content of the coloring material is preferably 0.05 to 20% by mass based on the total amount of the third ink.

[0062] In the third discharging step, the third ink is discharged onto the fabric. Further, the third discharging step may include a step of further discharging the third ink onto the region where the third ink has adhered.

[0063] The discharge amount Z of the third ink is preferably 0.10 mg / cm 2 to 10.00 mg / cm 2 or less, more preferably 0.50 mg / cm 2 to 5.00 mg / cm 2 or less, and even more preferably 1.00 mg / cm 2 to 3.00 mg / cm2 It is more preferable that it is as follows. When the discharge amount Z of the third ink is within the above range, the color development property becomes better. Also, the rubbing fastness of the image is excellent, and there is a tendency that the aggregation unevenness is not conspicuous.

[0064] In the third discharge step, it is preferable to heat when the third ink is adhered to the fabric. Thereby, for example, a clearer image can be recorded on the fabric.

[0065] Examples of the heating method include a heat press method, an atmospheric pressure steam method, a high pressure steam method, and a thermofix method. Examples of the heat source for heating include warm air, infrared rays, and microwaves.

[0066] In heating, it is preferable that the surface temperature of the heated fabric is 60 to 180°C. When the surface temperature is within the above range, damage to the inkjet head and the fabric can be reduced, and the ink is likely to uniformly wet and spread on the fabric and is likely to penetrate. The surface temperature can be measured using, for example, a non-contact thermometer (trade name "IT2-80", manufactured by Keyence Corporation).

[0067] As the heating time, for example, it is preferably 5 seconds or more and 5 minutes or less. When the heating time is within the above range, it is possible to sufficiently heat the fabric while reducing damage to the inkjet head and the fabric.

[0068] 1.3.1.2. Dispersant The third ink may contain a dispersant. When the third ink contains a dispersant, the dispersibility of the disperse dye is excellent, and the clogging resistance of the third ink is excellent. Examples of the dispersant include sodium naphthalene sulfonate-formalin condensate and resin. Sodium naphthalene sulfonate-formalin condensate is a compound obtained by condensing a sulfonated product having a naphthalene ring in the molecule with formalin, or a salt thereof. The dispersant may be used alone or in combination of two or more.

[0069] Since it has better dispersibility, it is preferable that the dispersant contains a resin. Examples of the resin include urethane resins, styrene-acrylic resins, acrylic resins, fluorene resins, polyolefin resins, rosin-modified resins, terpene resins, polyester resins, polyamide resins, epoxy resins, vinyl chloride resins, vinyl chloride-vinyl acetate copolymers, and ethylene-vinyl acetate resins. Among them, urethane resins and styrene-acrylic resins are preferable as the resin from the viewpoint of excellent clogging resistance, and styrene-acrylic resins are more preferable.

[0070] The urethane resin is not particularly limited as long as it has a urethane bond in the molecule. Examples of the urethane resin include polyether-type urethane resins containing an ether bond in the main chain, polyester-type urethane resins containing an ester bond in the main chain, and polycarbonate-type urethane resins containing a carbonate bond in the main chain, in addition to the urethane bond. The urethane resin may be used alone or in combination of two or more.

[0071] Commercially available products can also be used as the urethane resin. Examples of the commercially available products include, for example, Takelac (registered trademark) W6110 (trade name) manufactured by Mitsui Chemicals, Inc., Acrit (registered trademark) WBR-022U (trade name) manufactured by Dainippon Fine Chemical Co., Ltd., Permalin (registered trademark) UX-368T (trade name), Upren (registered trademark) UXA-307 (trade name), and Eucote (registered trademark) UWS-145 (trade name) manufactured by Sanyo Chemical Industries, Ltd., and Solsperse (registered trademark) 47000 (trade name) manufactured by Lubrizol Corporation.

[0072] Examples of styrene acrylic resins include styrene-acrylic acid copolymers, styrene-methacrylic acid copolymers, styrene-methacrylic acid-acrylic acid ester copolymers, styrene-α-methylstyrene-acrylic acid copolymers, and styrene-α-methylstyrene-acrylic acid-acrylic acid ester copolymers. These copolymers may have any form of random copolymer, block copolymer, alternating copolymer, and graft copolymer.

[0073] Commercially available products can also be used as the styrene acrylic resin. Examples of commercially available products include, for example, Joncryl® 67 (trade name) manufactured by BASF Japan Ltd., and Solsperse® 43000 (trade name) manufactured by Lubrizol Corporation.

[0074] From the viewpoint of more effectively and surely achieving the effects of this embodiment, the content of the dispersant is preferably 3.0 to 20.0% by mass based on the total amount of the third ink.

[0075] 1.3.1.3. Water-soluble organic solvent The third ink may contain a water-soluble organic solvent. 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; glycol monoethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene glycol monomethyl ether, 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, iso-propyl 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.

[0076] From the viewpoint of more effectively and surely achieving the operational effects of this embodiment, the content of the water-soluble organic solvent is preferably 5 to 30% by mass based on the total amount of the third ink.

[0077] 1.3.2. Surfactant It is preferable that at least one of the first ink, the second ink, and the third ink contains a surfactant. Examples of the surfactant include acetylene glycol-based surfactants, fluorine-based surfactants, and silicone-based surfactants. The surfactant may be used alone or in combination of two or more.

[0078] Examples of the acetylene glycol-based 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. As the acetylene glycol-based surfactant, commercially available products can also be used. Examples of commercially available products include the Olefin (registered trademark) 104 series (product name), D series and E series (product name) manufactured by Nissin Chemical Industry Co., Ltd., and the Surfynol (registered trademark) series (product name) manufactured by Air Products and Chemicals, Inc.

[0079] Examples of the fluorine-based surfactant include perfluoroalkyl sulfonates, perfluoroalkyl carboxylates, perfluoroalkyl phosphates, perfluoroalkyl ethylene oxide adducts, perfluoroalkyl betaines, and perfluoroalkyl amine oxide compounds. As the fluorine-based surfactant, commercially available products can also be used. Examples of commercially available products include S-144 (product name) and S-145 (product name) manufactured by Asahi Glass Co., Ltd.

[0080] Examples of the silicone-based surfactant include polysiloxane-based compounds and polyether-modified organosiloxanes. As the silicone-based surfactant, commercially available products can also be used. Examples of commercially available products include 306, 307, 333, 341, 345, 346, 347, 348, and 349 (above, product names) of the BYK (registered trademark) series manufactured by BYK-Chemie Japan Co., Ltd., and 503A (above, product name) of the Silface (registered trademark) SAG series manufactured by Nissin Chemical Industry Co., Ltd.

[0081] From the viewpoint of more effectively and surely exhibiting the effects of the present embodiment, the content of the surfactant is preferably 0.1 to 5.0% by mass based on the total amount of the third ink.

[0082] 1.3.3. Water At least one of the first ink, the second ink, and the third ink may contain water. From the viewpoint of more effectively and reliably achieving the effects of the present embodiment, the water content is preferably 30 to 80% by mass based on the total amount of the third ink.

[0083] 1.3.4. Other Components At least one of the first ink, the second ink, and the third ink may contain various additives such as a humectant, a penetrant, a solubilizing agent, a viscosity modifier, a pH adjuster, an antioxidant, a preservative, a fungicide, a corrosion inhibitor, and a chelating agent for capturing metal ions that affect dispersion. The additives may be used alone or in combination of two or more.

[0084] The third ink and the first ink and / or the second ink are ejected in the same pass, or It is preferable to eject the third ink in a pass after the first ink and / or the second ink. In the present embodiment, the "pass" is a unit of the relative movement path between the inkjet head and the fabric, and means a path of one section when the relative movement of the inkjet head with respect to the fabric is divided into one-directional linear movements from an arbitrary coordinate to the next coordinate.

[0085] 1.4. Dry Heat Treatment Step The inkjet recording method of the present embodiment preferably further includes a dry heat treatment step. The inkjet recording method of the present embodiment may include a dry heat treatment step of dry heat treating the first ink, the second ink, and the third ink adhered to the fabric after the first ejection step, the third ejection step, and the third ejection step.

[0086] Examples of the heating method include a heat press method, an atmospheric pressure steam method, a high pressure steam method, and a thermofix method. Examples of the heat source for heating include infrared rays (lamps). Further, the heating temperature is preferably, for example, 180°C or lower. Thereby, even if the fabric is pre-colored with a dye, for example, sublimation of the dye due to heat drying can be suppressed, and fading of the fabric base color can be suppressed. Further, the lower limit of the heating temperature may be such that a medium such as moisture contained in the ink volatilizes, and is preferably 100°C or higher.

[0087] The inkjet recording method of the present embodiment may include a cleaning step, if necessary, after discharging each ink onto the fabric. By including the cleaning step, components contained in each ink that is not adhered to the fabric can be removed.

[0088] 2.1. Inkjet Ink Set The inkjet ink set of the present embodiment includes the above-described first ink, the above-described second ink, and the above-described third ink used in the inkjet recording method of the present embodiment.

Examples

[0089] Hereinafter, the present invention will be described more specifically using examples and comparative examples. The present invention is not limited in any way by the following examples.

[0090] 1. Preparation Method of First Ink A 37.5 parts by mass of Vyloner MD-2000 (manufactured by Toyobo Co., Ltd., active ingredient 40%, glass transition temperature 67°C) as an aqueous dispersion of polyester resin, 17.0 parts by mass of triethylene glycol as a humectant, 3.0 parts by mass of 1,2-hexanediol as a penetrant, 0.1 part by mass of Silface SAG503A as a surfactant, and 42.4 parts by mass of pure water were mixed, stirred for 60 minutes using a stirrer, and then filtered through a membrane filter with a pore size of 8.0 μm to obtain the first ink A.

[0091] 2. Preparation Method of First Ink B As a water dispersion of polyester resin, 40.0 parts by mass of Plaskote Z-3310 (manufactured by Gohsei Chemical Industry Co., Ltd., active ingredient 25%, glass transition temperature -20 °C), 17.0 parts by mass of triethylene glycol as a humectant, 3.0 parts by mass of 1,2-hexanediol as a penetrant, 0.1 part by mass of Silface SAG503A as a surfactant, and 42.4 parts by mass of pure water were mixed, stirred for 60 minutes using a stirrer, and then filtered through a membrane filter with a pore size of 8.0 μm to obtain the first ink B.

[0092] 3. Method for preparing the second ink 7.5 parts by mass of Fixer #104EA (manufactured by Murayama Chemical Laboratory Co., Ltd., active ingredient 27%) as a compound containing a blocked isocyanate structure, 17.0 parts by mass of triethylene glycol as a humectant, 3.0 parts by mass of 1,2-hexanediol as a penetrant, 0.1 part by mass of Silface SAG503A as a surfactant, and 72.4 parts by mass of pure water were mixed, stirred for 60 minutes using a stirrer, and then filtered through a membrane filter with a pore size of 8.0 μm to obtain the second ink.

[0093] 4. Method for preparing the third ink 15.0 parts by mass of C.I. Disperse Red 60 as a disperse dye, 15.0 parts by mass of an acrylic-styrene copolymer resin (Solsperse 43000, manufactured by Lubrizol Corporation), 0.1 part by mass of Orfin D-10PG (manufactured by Nisshin Chemical Industry Co., Ltd.), and 70.0 parts by mass of pure water were dispersed using a paint shaker with 0.3 mm zirconia beads to obtain a dye dispersion. 40.0 parts of the obtained dye dispersion, 20 parts of glycerin as a humectant, 5.0 parts of propylene glycol, and 0.1 part of Silface SAG503A as a surfactant were mixed, stirred for 60 minutes, and then filtered through a membrane filter with a pore size of 8.0 μm to obtain the third ink.

[0094] 5. Printing method, printing and dyeing method The first inks A and B, the second ink, and the third ink were each printed on cotton broadcloth #4000 (manufactured by Nisshinbo) with an area of 1 cm × 1 cm using a printer PM-G930 (manufactured by Seiko Epson) at an arbitrary ratio described in each example and comparative example in FIG. 1 or FIG. 2. Thereafter, drying was performed in an oven at 120° C. for 2 minutes, and then pressing was performed using a heat press AF-54TEN (manufactured by Asahi Fiber) at 180° C. for 200 seconds. Excess dye was removed with running water and air-dried for one day to obtain a record.

[0095] 6. Evaluation 6.1. Evaluation Method for Color Development The recording surface of the obtained record was measured using a spectro densitometer FD-7 (manufactured by Konica Minolta) under the conditions of a light D65 light source and a viewing angle of 2 degrees, and the OD value was measured. When the evaluation result is B or higher, it can be said that the color development is excellent. The results are shown in FIG. 1 or FIG. 2.

[0096] AA: The OD value after printing was 1.2 or more. A: The OD value after printing was 1.1 or more and less than 1.2. B: The OD value after printing was 0.95 or more and less than 1.1. C: The OD value after printing was 0.8 or more and less than 0.95. D: The OD value after printing was less than 0.8.

[0097] 6.2. Texture According to the production of the above record, after producing a record to which the ink adhered, the texture of the obtained record was evaluated by a sensory test. Specifically, for the obtained record, five arbitrary judges judged whether it was "not inferior to the original texture of the fabric" or "the printed matter is rough and the original texture of the fabric is impaired", and evaluated the texture according to the following evaluation criteria. When the evaluation result is B or higher, it can be said that the texture is excellent. The results are shown in FIG. 1 or FIG. 2. A: Four or more judges answered that it was "not inferior to the original texture of the fabric". B: Three judges answered that it was "not inferior to the original texture of the fabric". C: There was one or two judges who answered that it was "not inferior to the original texture of the fabric". D: There were zero judges who answered that it was "not inferior to the original texture of the fabric".

[0098] An inkjet recording method including a first discharging step of discharging a first ink onto a fabric, a second discharging step of discharging a second ink onto the fabric, and a third discharging step of discharging a third ink onto the fabric, wherein the discharge amount X of the first ink is 0.60 mg / cm2 or less in terms of solid content, and the discharge amount Y of the second ink is 0.15 mg / cm2 or less in terms of solid content, was able to obtain a recording material excellent in color development and texture. On the other hand, Comparative Examples 1 to 3 in which the first ink discharging step, the second ink discharging step, or the third ink discharging step was not performed were inferior in color development. The discharge amount of the second ink was 0.15 mg / cm 2 Comparative Example 4 which was not as follows, and the discharge amount of the first ink was 0.60 mg / cm 2 Comparative Examples 5 to 7 which were not as follows were inferior in texture. Comparative Example 8 in which a fourth ink containing polyester particles having a glass transition temperature of less than 0°C was discharged onto the fabric instead of the first ink discharging step was inferior in color development.

Claims

1. A first ejection step of ejecting a first ink containing polyester particles that do not contain a coloring material or contain 0.1% by mass or less thereof and have a glass transition temperature of 0°C or higher onto a fabric; A second ejection step of ejecting a second ink that does not contain a coloring material or contains 0.1% by mass or less thereof and contains a crosslinking agent onto the fabric; A third ejection step of ejecting a third ink containing a sublimable coloring material onto the fabric, and The discharge amount X of the first ink is 0.60 mg / cm in terms of solid content 2 or less, The discharge amount Y of the second ink is 0.15 mg / cm in terms of solid content 2 or less, an inkjet recording method.

2. The third ink and the first ink and / or the second ink are ejected in the same pass, or The third ink is ejected in a pass after the first ink and / or the second ink. The inkjet recording method according to Claim 1.

3. The discharge amount X of the first ink is 0.03 mg / cm in terms of solid content 2 or more and 0.50 mg / cm 2 or less. The inkjet recording method according to claim 1

4. The discharge amount Y of the second ink is 0.01 mg / cm in terms of solid content 2 or more and 0.115 mg / cm 2 or less. The inkjet recording method according to claim 1

5. The ratio (Y / X) of the discharge amount Y (mg / cm 2 ) in terms of solid content of the second ink to the discharge amount X (mg / cm 2 ) in terms of solid content of the first ink is 0.05 or more and 4.00 or less. The inkjet recording method according to claim 1.

6. The inkjet recording method according to Claim 1, wherein at least one of the first ink, the second ink, and the third ink contains a surfactant.

7. The inkjet recording method according to Claim 1, further having a dry heat treatment step.

8. An inkjet ink set including the first ink, the second ink, and the third ink, which is used in the inkjet recording method according to any one of Claims 1 to 7.

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