Inkjet treatment liquid, inkjet textile printing device, and inkjet textile printing method

Abstract

SOLUTION: An inkjet treatment liquid contains emulsified particles containing a silicone oil, and an aqueous medium, wherein the silicone oil includes an ionic group-containing silicone oil and a non-denatured silicone oil.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a processing liquid for inkjet, an inkjet printing apparatus, and an inkjet printing method.

Background Art

[0002] In an inkjet printing method, for example, an ink containing a pigment is used. In order to improve the rubbing fastness of a printing target (hereinafter sometimes referred to as a printed matter) on which an image is formed, the ink containing a pigment may be used together with a post-treatment liquid.

[0003] On the other hand, conventionally, a conveyance roller for an inkjet recording apparatus is known (see, for example, Patent Document 1). In the conveyance roller described in Patent Document 1, a processing liquid containing one or both of fullerene and a fullerene derivative is applied to the surface of the conveyance roller.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

[0005] The processing liquid for inkjet according to the first aspect of the present disclosure includes emulsified particles containing silicone oil and an aqueous medium, where the silicone oil includes an ionic group-containing silicone oil and a non-modified silicone oil.

Brief Description of the Drawings

[0006] [Figure 1] FIG. 1 is a side view showing an example of an inkjet printing apparatus according to the second embodiment of the present disclosure.

Modes for Carrying Out the Invention

[0007] In recent years, there has been a growing demand for further improvements in the rubbing fastness of printed materials in inkjet textile printing technology. The rubbing fastness of printed materials is expected to vary depending on factors such as the concentration of silicone oil contained in the processing solution and the amount of processing solution discharged. For example, if the amount of processing solution discharged is small, it is expected that if the concentration of silicone oil is too low, it may affect the rubbing fastness of the printed material. Therefore, it would be desirable to know the characteristics of an inkjet processing solution that can produce printed materials with excellent rubbing fastness from perspectives other than adjusting the concentration of silicone oil.

[0008] Here, it is assumed that the friction fastness of the printed material will also change depending on the type of silicone oil contained in the processing solution. Therefore, it would be preferable to know the characteristics of an inkjet processing solution that can produce printed materials with excellent friction fastness, from the perspective of the type of silicone oil.

[0009] Furthermore, friction fastness can be categorized into dry friction fastness and wet friction fastness. Depending on the type of silicone oil contained in the processing solution, it is often possible to produce printed materials with excellent friction fastness in one of these two aspects. Therefore, there is a need for an inkjet processing solution that can produce printed materials with excellent dry and wet friction fastness. Moreover, it would be even preferable if the inkjet processing solution could also suppress the deterioration of the tactile feel of the printed material.

[0010] The inkjet processing solution of this disclosure can suppress a decrease in the tactile feel of printed materials and can produce printed materials with excellent dry and wet rubbing fastness.

[0011] Embodiments of this disclosure will be described below. In this specification, the median diameter (D) is used. 50 The measured value of ) is the median diameter measured using a laser diffraction / scattering particle size distribution analyzer (LA-950, manufactured by Horiba, Ltd.), unless otherwise specified. Hereafter, the volume median diameter will be referred to as "D 50It may be stated as "[main component] of the material." Unless otherwise specified, the "main component" of the material means the component that is present in the greatest quantity by mass. Unless otherwise specified, "specific gravity" means the specific gravity at 25°C. Acrylic and methacrylic may be collectively referred to as "(meth)acrylic." Each component described herein may be used individually or in combination of two or more.

[0012] [First Embodiment: Inkjet Processing Solution] The following describes the inkjet processing solution (hereinafter also referred to as the processing solution) according to the first embodiment of this disclosure. The processing solution according to the first embodiment includes emulsion particles and an aqueous medium. The emulsion particles are dispersed in the aqueous medium of the processing solution. That is, the processing solution according to the first embodiment is an emulsion, and more specifically, an oil-in-water (O / W) type emulsion.

[0013] The processing solution according to the first embodiment is suitably used, for example, in an inkjet printing apparatus and an inkjet printing method described later. The processing solution according to the first embodiment is, for example, a processing solution for post-processing. Specifically, after an image is formed in the image-forming area of ​​the object to be printed with ink, the image-forming area is post-processed with the processing solution according to the first embodiment.

[0014] <Emulsified particles> The emulsified particles contained in the processing solution contain silicone oil. The silicone oil includes ionic group-containing silicone oil and unmodified silicone oil. In other words, the processing solution contains ionic group-containing silicone oil, unmodified silicone oil, and an aqueous medium, and the ionic group-containing silicone oil and unmodified silicone oil are dispersed in the processing solution while contained within the emulsified particles.

[0015] In the inkjet processing solution according to this first embodiment, the emulsion particles containing silicone oil can be classified into three types. Specifically, they can be classified into emulsion particles containing only ionic group-containing silicone oil, emulsion particles containing only unmodified silicone oil, and emulsion particles containing both ionic group-containing silicone oil and unmodified silicone oil. More specifically, the emulsion particles contained in the processing solution may include first emulsion particles containing ionic group-containing silicone oil and second emulsion particles containing unmodified silicone oil. Alternatively, the emulsion particles contained in the processing solution may include emulsion particles containing both ionic group-containing silicone oil and unmodified silicone oil (hereinafter also referred to as "third emulsion particles"). Alternatively, the emulsion particles contained in the processing solution may include first emulsion particles containing ionic group-containing silicone oil, second emulsion particles containing unmodified silicone oil, and third emulsion particles containing both ionic group-containing silicone oil and unmodified silicone oil. Of these, from the viewpoint of being able to produce printed materials with superior wet friction fastness, it is preferable that the emulsion particles include first emulsion particles containing ionic group-containing silicone oil and second emulsion particles containing unmodified silicone oil. By including both ionic group-containing silicone oil and unmodified silicone oil in the emulsion particles, the following first to fifth advantages can be obtained.

[0016] Let me explain the first advantage. Silicone oil has a friction-reducing effect. When the printing target is post-treated with the processing solution, the image formed on the printing target is coated with silicone oil, reducing the coefficient of friction of the surface of the printing target. As a result, even if the image formed on the printing target is rubbed, color fading is less likely to occur, and it is possible to produce printed materials with excellent dry and wet friction fastness. In addition, by being coated with silicone oil, which has a friction-reducing effect, friction between the threads of the printing target is reduced. As a result, stiffness of the printing target caused by image formation is reduced, and the deterioration of the tactile feel of the printed material is suppressed.

[0017] Let me explain the second advantage. Silicone oil is water-repellent. By post-treating the printing target with the processing solution, the printing target is coated with water-repellent silicone oil, imparting water repellency to the surface of the printing target. As a result, even when the image formed on the printing target is rubbed in a wet state, color fading is less likely to occur, and a printed material with excellent wet friction fastness can be produced.

[0018] Let me explain the third advantage. It is presumed that because the ionic group-containing silicone oil has ionic groups, ionic bonds are formed between the ionic groups and the object to be printed, and between the ionic groups and the polymer, ink, and / or binder of the pretreatment solution discharged onto the object to be printed. Due to the formation of ionic bonds, the ionic group-containing silicone oil is less likely to be washed away by water from the object to be printed, the polymer of the pretreatment solution, the ink binder, and / or the ink. As a result, printed materials with excellent wet friction fastness can be produced.

[0019] Let me explain the fourth advantage. Because the ionic group-containing silicone oil has ionic groups, emulsion particles containing the ionic group-containing silicone oil are suitably dispersed in the aqueous medium of the processing solution. Such a processing solution can be suitably discharged from the processing head of an inkjet printing apparatus. When the processing solution is discharged from the processing head, the amount of processing solution used is reduced compared to when the printing material is immersed in the processing solution. Therefore, stiffness is less likely to occur in the printing material, and a decrease in the tactile feel of the printed material is suppressed. In addition, when the processing solution is discharged from the processing head, a silicone oil with higher viscosity can be used compared to when ink containing silicone oil as a base oil is discharged from the recording head. Therefore, it is possible to produce printed materials with excellent friction fastness.

[0020] Let me explain the fifth advantage. By including both ionic group-containing silicone oil and unmodified silicone oil in the processing solution, the printed material exhibits excellent dry and wet rubbing fastness. Specifically, as mentioned in the third advantage above, including ionic group-containing silicone oil makes it possible to produce printed material with excellent wet rubbing fastness. In addition, by including unmodified silicone oil, which has higher lubricity and film durability compared to ionic group-containing silicone oil, it is possible to produce printed material with excellent dry rubbing fastness as well. The first to fifth advantages have now been explained.

[0021] The silicone oil content in the processing solution is preferably 5% by mass or more and 15% by mass or less. A silicone oil content of 5% by mass or more further suppresses the deterioration of the tactile feel of the printed material and allows for the production of printed materials with superior friction fastness. A silicone oil content of 15% by mass or less allows for good discharge of the processing solution from the processing head of the inkjet printing apparatus. Furthermore, depending on the ratio of unmodified silicone oil to ionic group-containing silicone oil in the processing solution, a silicone oil content of 15% by mass or less suppresses an excessive increase in the amount of ionic groups in the ionic group-containing silicone oil. As a result, it prevents difficulty in imparting appropriate water repellency to the surface of the printed material and suppresses a decrease in the friction fastness of the printed material. In particular, if the silicone oil content is within this concentration range, depending on the ratio of unmodified silicone oil to ionic group-containing silicone oil in the processing solution, printed materials with superior friction fastness can be produced.

[0022] The content rate of silicone oil in the treatment liquid is preferably 7% by mass or more, more preferably 9% by mass or more, still more preferably 10% by mass or more. Further, the content rate of silicone oil in the treatment liquid is preferably 14% by mass or less, more preferably 13% by mass or less. In particular, by setting the content rate of silicone oil in the treatment liquid within the range of 10% by mass or more and 13% by mass or less, a printing dyed product excellent in both dry friction fastness and wet friction fastness can be produced.

[0023] The content rate of silicone oil in the treatment liquid means the percentage of the mass of silicone oil with respect to the mass of the treatment liquid. In the present specification, the content rate of silicone oil means the percentage of the total mass of an ionic group-containing silicone oil and a non-modified silicone oil with respect to the mass of the treatment liquid.

[0024] The viscosity of the silicone oil is preferably 500 mm 2 / s (that is, mm 2 / second) or more. When the viscosity of the silicone oil is 500 mm 2 / s or more, it becomes difficult for the silicone oil to desorb from the printed dyed product due to friction, and a printed dyed product excellent in dry friction fastness and wet friction fastness can be produced. Further, as already described, the treatment liquid according to the first embodiment can be discharged from the treatment head of an inkjet printing apparatus. When the treatment liquid is discharged from the treatment head, the amount of the treatment liquid used is reduced as compared with the case where the printed dyed product is immersed in the treatment liquid. Therefore, even when a silicone oil having a high viscosity of 500 mm 2 / s or more is used in the treatment liquid, it is difficult to cause roughness on the printing object, and a decrease in the tactile sensation of the printed dyed product is more suppressed.

[0025] The upper limit of the viscosity of the silicone oil is not particularly limited. The viscosity of the silicone oil is preferably, for example, 100000 mm 2 / s or less, and preferably 6000 mm 2 / s or less. The viscosity of the silicone oil is, for example, 500 mm 2 / s, 700 mm2 / s, 900mm 2 / s, 1000mm 2 / s, 1100mm 2 / s, 1200mm 2 / s, 1500mm 2 / s, 1700mm 2 / s, 1800mm 2 / s, 2000mm 2 / s, 3000mm 2 / s, 5700mm 2 / s, and 6000mm 2 The range may be within two values ​​selected from the group consisting of / s.

[0026] The viscosity of the silicone oil refers to the kinematic viscosity at 25°C. In this specification, the viscosity of the silicone oil as described above refers to the viscosity of the silicone oil contained in one emulsion particle. Specifically, if one emulsion particle contains one type of silicone oil, the viscosity of the silicone oil refers to the viscosity of that one type of silicone oil. For example, if the first emulsion particle contains one type of ionic group-containing silicone oil and the second emulsion particle contains one type of unmodified silicone oil, the viscosity of the silicone oil refers to the viscosity of the ionic group-containing silicone oil or the unmodified silicone oil. Alternatively, if one emulsion particle contains two or more types of silicone oil, the viscosity of the silicone oil refers to the viscosity of the mixture of those two or more silicone oils. For example, if one emulsion particle contains both one type of ionic group-containing silicone oil and one type of unmodified silicone oil, the viscosity of the silicone oil refers to the viscosity of the mixture of the ionic group-containing silicone oil and the unmodified silicone oil. Furthermore, the viscosity requirements for the silicone oil mentioned above refer to the fact that all types of emulsion particles contained in the processing solution satisfy these requirements.

[0027] Furthermore, the viscosity of the ionic group-containing silicone oil contained in the processing liquid according to this first embodiment is 500 mm. 2It is preferable that the viscosity of the ionic group-containing silicone oil is 500 mmHg or higher. 2 By having a viscosity of 1 / s or higher, the silicone oil is less likely to detach from the printed material due to friction, and in particular, printed materials with excellent wet friction fastness can be produced. The viscosity of the ionic group-containing silicone oil is 1000 mm². 2 It is even more preferable that the viscosity is 100,000 mm² or higher. Furthermore, there is no particular upper limit to the viscosity of the ionic group-containing silicone oil, but the viscosity of the ionic group-containing silicone oil is 100,000 mm². 2 It is more preferable that it be less than or equal to / s, and 6000mm 2 It is even more preferable that the time is less than or equal to / s.

[0028] Furthermore, the viscosity of the unmodified silicone oil contained in the processing liquid according to this first embodiment is 300 mm. 2 It is preferable that the viscosity of the unmodified silicone oil is 300 mm² or higher. 2 A viscosity of 500 mm² or higher makes it difficult for the silicone oil to detach from the printed material due to friction, and in particular, it is possible to produce printed materials with excellent dry friction fastness. The viscosity of the unmodified silicone oil is 500 mm². 2 It is more preferable that it be 1000mm or more / s. 2 It is even more preferable that the viscosity is 100,000 mm² or higher. Furthermore, there is no particular upper limit to the viscosity of the unmodified silicone oil, but the viscosity of the unmodified silicone oil is 100,000 mm². 2 It is more preferable that it be less than or equal to / s, and 6000mm 2 It is even more preferable that the time is less than or equal to / s.

[0029] The viscosity of silicone oil is measured in accordance with the method described in JIS (Japanese Industrial Standards) Z8803:2011 (Method for measuring the viscosity of liquids). For example, the viscosity of silicone oil can be measured by separating it from the processing solution by extracting it with toluene, washing it, and drying it.

[0030] The average particle size of the emulsion particles (dispersed particle size in an aqueous medium) is preferably between 100 nm and 250 nm. By having an average particle size of 100 nm or more and 250 nm or less, the inkjet processing solution according to this first embodiment further suppresses the deterioration of the tactile feel of the printed material, enables the production of printed materials with superior friction fastness, and provides excellent discharge from the processing head of the inkjet printing apparatus.

[0031] Specifically, by making the average particle size of the emulsified particles 100 nm or more, it is possible to prevent a decrease in the friction fastness of the printed material, especially the wet friction fastness. On the other hand, by making the average particle size of the emulsified particles 250 nm or less, it is possible to improve the discharge performance of the processing liquid from the processing head.

[0032] Furthermore, it is more preferable that the average particle diameter of the emulsion particles be between 100 nm and 160 nm. Alternatively, the average particle diameter of the emulsion particles may be within the range of two values ​​selected from the group consisting of, for example, 100 nm, 105 nm, 110 nm, 115 nm, 120 nm, 125 nm, 130 nm, 135 nm, 140 nm, 145 nm, 150 nm, 155 nm, 160 nm, 170 nm, 180 nm, 190 nm, 200 nm, 210 nm, 220 nm, and 250 nm.

[0033] In this specification, when the processing solution contains two or more emulsion particles with different average particle sizes (for example, two or more emulsion particles selected from the group consisting of first emulsion particles containing ionic group-containing silicone oil, second emulsion particles containing unmodified silicone oil, and third emulsion particles containing both ionic group-containing silicone oil and unmodified silicone oil), "the average particle size of the emulsion particles is within a specific range" means "the average particle size of each of the two or more emulsion particles is within a specific range." Furthermore, when the processing solution contains two or more emulsion particles with different average particle sizes, it is preferable that the difference between the average particle sizes of each emulsion particle is smaller. For example, it is more preferable that the average particle size of the first emulsion particles containing ionic group-containing silicone oil and the average particle size of the second emulsion particles containing unmodified silicone oil are both within the range of 100 nm to 160 nm.

[0034] The average particle size of emulsified particles refers to the harmonic mean particle size (also called the cumulant mean particle size) calculated based on scattered light intensity using the cumulant method. The average particle size of emulsified particles is measured in accordance with the method described in ISO 13321:1996 (Particle size analysis - Photon correlation spectroscopy).

[0035] Furthermore, the emulsified particles may contain components other than silicone oil. However, if the emulsified particles contain only silicone oil, it is possible to more reliably produce printed materials with excellent friction fastness and to more reliably suppress the deterioration of the tactile feel of the printed materials.

[0036] As already mentioned, the silicone oil contained in the emulsion particles includes ionic group-containing silicone oil and unmodified silicone oil. It is also possible that the first emulsion particles contain ionic group-containing silicone oil, while the second emulsion particles, which are a different type of emulsion particle, contain unmodified silicone oil. Alternatively, one type of emulsion particle may contain both ionic group-containing silicone oil and unmodified silicone oil. The following describes ionic group-containing silicone oil and unmodified silicone oil.

[0037] (Ionic group-containing silicone oil) Silicone oils containing ionic groups are modified silicone oils, and more specifically, ionic group-modified silicone oils. Examples of ionic group-modified silicone oils include modified silicone oils in which ionic groups are introduced into the side chains, and modified silicone oils in which ionic groups are introduced into the terminal groups.

[0038] Modified silicone oils in which ionic groups are introduced into the side chains have a first terminal group represented by the following formula (1a), a repeating unit represented by the following formula (1b), a repeating unit represented by the following formula (1c), and a second terminal group represented by the following formula (1d).

[0039] [ka]

[0040] In formula (1a), * indicates a bond to a silicon atom in the repeating unit represented by formula (1b) or (1c). In formula (1d), * indicates a bond to an oxygen atom in the repeating unit represented by formula (1b) or (1c). In formula (1c), R 1 The symbol represents a group containing an ionic group. Preferred ionic groups include amino groups, carboxyl groups, phenolic hydroxyl groups, or silanol groups.

[0041] A modified silicone oil in which an ionic group is introduced to the terminal group has a first terminal group represented by the following formula (2a), a repeating unit represented by the following formula (2b), and a second terminal group represented by the following formula (2c).

[0042] [ka]

[0043] In formula (2a), * indicates a bond to the silicon atom in the repeating unit represented by formula (2b). In formula (2c), * indicates a bond to the oxygen atom in the repeating unit represented by formula (2b). In formula (2a), R 2 , and R in equation (2c) 3 Each of these independently represents a group containing an ionic group. Preferred ionic groups include amino groups, carboxyl groups, phenolic hydroxyl groups, or silanol groups.

[0044] The ionic group-containing silicone oil preferably contains at least one selected from the group consisting of amino-modified silicone oil, carboxy-modified silicone oil, phenol-modified silicone oil, and silanol-modified silicone oil. Furthermore, it is more preferable that the ionic group-containing silicone oil is at least one selected from the group consisting of these. Moreover, it is more preferable that the ionic group-containing silicone oil is one of these. Amino-modified silicone oil, carboxy-modified silicone oil, phenol-modified silicone oil, and silanol-modified silicone oil each have an amino group, a carboxyl group, a phenolic hydroxyl group, and a silanol group as ionic groups, respectively. Of these, the ionic group-containing silicone oil is more preferably a carboxy-modified silicone oil.

[0045] To suitably disperse emulsion particles containing ionic group-containing silicone oil in an aqueous medium, the functional group equivalent of the ionic group-containing silicone oil is preferably 1000 g / mol or more and 5500 g / mol or less. The functional group equivalent is the molecular weight per 1 mole of functional group (ionic group). The functional group equivalent of the ionic group-containing silicone oil may be within the range of two values ​​selected from the group consisting of, for example, 1000 g / mol, 1200 g / mol, 1474 g / mol, 1490 g / mol, 1500 g / mol, 2000 g / mol, 3800 g / mol, 3900 g / mol, 4000 g / mol, 5000 g / mol, 5200 g / mol, and 5500 g / mol.

[0046] When one type of emulsion particle contains an ionic group-containing silicone oil, or when one type of emulsion particle contains both an ionic group-containing silicone oil and an unmodified silicone oil, the content of the ionic group-containing silicone oil relative to the total mass of silicone oil contained in the emulsion particle is preferably 30% by mass or more and 100% by mass or less, more preferably 40% by mass or more and 100% by mass or less, and particularly preferably 100% by mass.

[0047] (Undenatured silicone oil) By further including not only ionic group-containing silicone oil but also unmodified silicone oil in the processing solution, the dry friction fastness can be improved. Furthermore, when both ionic group-containing silicone oil and unmodified silicone oil are contained in a single type of emulsion particle, the viscosity of the silicone oil can also be adjusted. Specifically, the unmodified silicone oil preferably contains dimethylpolysiloxane, and more preferably dimethylpolysiloxane.

[0048] When one type of emulsion particle contains unmodified silicone oil, or when one type of emulsion particle contains both ionic group-containing silicone oil and unmodified silicone oil, the content of unmodified silicone oil relative to the total mass of silicone oil contained in the emulsion particle is preferably 50% by mass or more and 100% by mass or less, more preferably 50% by mass or more and 70% by mass or less, and even more preferably 50% by mass or more and 60% by mass or less.

[0049] The silicone oil contained in the emulsion particles is preferably a combination of carboxy-modified silicone oil and dimethylpolysiloxane. In this case, the first emulsion particle may contain carboxy-modified silicone oil and the second emulsion particle may contain dimethylpolysiloxane. Alternatively, one type of emulsion particle may contain both carboxy-modified silicone oil and dimethylpolysiloxane. Of these, it is preferable that the first emulsion particle contains carboxy-modified silicone oil and the second emulsion particle contains dimethylpolysiloxane, from the viewpoint of being able to produce a printed material with superior wet rubbing fastness.

[0050] The ratio of unmodified silicone oil to ionic group-containing silicone oil in the processing solution is preferably 0.33 to 3. By setting the ratio of unmodified silicone oil within this range, the deterioration of the tactile feel of the printed material can be more reliably suppressed, and printed materials with excellent dry and wet rubbing fastness can be produced more reliably. The ratio of unmodified silicone oil to ionic group-containing silicone oil is even more preferably 0.33 to 1. By setting the ratio of unmodified silicone oil within this range, printed materials with even better wet rubbing fastness can be produced.

[0051] <Aqueous medium> The aqueous medium contained in the processing solution is a medium whose main component is water. The aqueous medium may function as a solvent or as a dispersion medium. Specific examples of the aqueous medium include water or a mixture of water and a polar solvent. Examples of polar solvents contained in the aqueous medium include methanol, ethanol, isopropyl alcohol, butanol, and methyl ethyl ketone. The water content in the aqueous medium is preferably 90% by mass or more, and particularly preferably 100% by mass. The content of the aqueous medium is preferably 50% by mass or more and 90% by mass or less, and more preferably 55% by mass or more and 70% by mass or less, relative to the mass of the processing solution.

[0052] <Other ingredients> The processing solution may, if necessary, contain emulsified particles containing silicone oil (including ionic group-containing silicone oil and unmodified silicone oil) and components other than the aqueous medium (hereinafter sometimes referred to as "other components"). Examples of other components include acids, bases, polyols, and dispersants.

[0053] (acid) If the ionic group-containing silicone oil also has anionic groups, the treatment solution preferably contains an acid. The acid promotes the ionization of the anionic groups, allowing the emulsion particles containing the ionic group-containing silicone oil to disperse favorably in the aqueous medium. Examples of acids include strong acids and weak acids. Examples of strong acids include hydrochloric acid, p-toluenesulfonic acid, and sulfuric acid. Examples of weak acids include benzoic acid and acetic acid. To promote the ionization of the anionic groups in the silicone oil, a strong acid is preferred. Specifically, hydrochloric acid, p-toluenesulfonic acid, or sulfuric acid are more preferred. If the treatment solution contains an acid, the acid content, converted to the amount of acid at a concentration of 1 mol / L, is preferably 1% by mass or more and 5% by mass or less relative to the mass of the treatment solution.

[0054] (base) If the ionic group-containing silicone oil also contains cationic groups, the treatment solution preferably contains a base. The base promotes the ionization of the cationic groups, allowing the emulsion particles containing the ionic group-containing silicone oil to disperse favorably in the aqueous medium. Examples of bases include sodium hydroxide. When the treatment solution contains a base, the base content, converted to the amount of base at a concentration of 1 mol / L, is preferably 1% by mass or more and 5% by mass or less relative to the mass of the treatment solution.

[0055] (Polyol) The viscosity of the treatment solution is suitably adjusted by including a polyol in the treatment solution. Diols or triols are preferred as polyols. Examples of diols include glycol compounds. More specifically, examples include ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, and tetraethylene glycol. Examples of triols include glycerin. When the treatment solution contains a polyol, the polyol content is preferably 10% to 40% by mass, and more preferably 15% to 35% by mass, relative to the mass of the treatment solution.

[0056] (Dispersant) Examples of dispersants include surfactants, resin dispersants, and polysaccharides. However, it is preferable that the emulsion particles are dispersed in the treatment solution without the treatment solution containing a dispersant. As already mentioned, emulsion particles containing ionic group-containing silicone oil disperse well in aqueous media. Therefore, even if a dispersant is not included, the dispersion state of the emulsion particles can be maintained. Dispersants often have hydrophilic groups. By not including a dispersant with hydrophilic groups in the treatment solution, the wet rubbing fastness of the printed material treated with the treatment solution is further improved.

[0057] <Method for producing the treatment solution> An example of a method for producing a treatment solution is described below. First, an ionic group-containing silicone oil, an aqueous medium, and components added as needed (e.g., an acid or base, and a polyol) are mixed and emulsified using a homogenizer. In this way, first emulsion particles containing the ionic group-containing silicone oil are dispersed in the aqueous medium to obtain a first treatment solution. Next, an unmodified silicone oil, an aqueous medium, and components added as needed (e.g., an acid or base, and a polyol) are mixed and emulsified using a homogenizer. In this way, second emulsion particles containing the unmodified silicone oil are dispersed in the aqueous medium to obtain a second treatment solution. Finally, by mixing the first and second treatment solutions, a treatment solution containing first emulsion particles containing the ionic group-containing silicone oil and second emulsion particles containing the unmodified silicone oil can be produced.

[0058] To facilitate emulsification, a first raw material emulsion containing first emulsifying particles and a second raw material emulsion containing second emulsifying particles may be prepared in advance. The first and second raw material emulsions may then be mixed with an aqueous medium and, if necessary, a polyol to obtain a processing solution. The raw material emulsion may contain, for example, an ionic group-containing silicone oil or an unmodified silicone oil, a portion of the aqueous medium, and, if necessary, an acid or a base. In the preparation of the raw material emulsion, the emulsification time is, for example, 5 minutes to 1 hour. The emulsification temperature is, for example, 5°C to 40°C. The content of the raw material emulsion is, for example, 15% to 50% by mass relative to the mass of the processing solution.

[0059] Another example of a method for producing the treatment solution is described below. First, an ionic group-containing silicone oil, a non-modified silicone oil, an aqueous medium, and optionally added components (e.g., an acid or base, and a polyol) are mixed and emulsified using a homogenizer. In this way, emulsified particles containing both the ionic group-containing silicone oil and the non-modified silicone oil are dispersed in the aqueous medium. Finally, a treatment solution containing emulsified particles containing both the ionic group-containing silicone oil and the non-modified silicone oil can be produced.

[0060] In this example as well, in order to facilitate emulsification, a raw material emulsion containing emulsifying particles that include both ionic group-containing silicone oil and unmodified silicone oil may be prepared in advance, and the raw material emulsion may be mixed with an aqueous medium and, if necessary, a polyol to obtain a processing solution. The raw material emulsion may contain, for example, ionic group-containing silicone oil, unmodified silicone oil, a portion of the aqueous medium, and, if necessary, an acid or base. The emulsification time and emulsification temperature during the preparation of the raw material emulsion, as well as the content of the raw material emulsion, are the same as in the production example described above.

[0061] To adjust the average particle size of the emulsion particles contained in the processing solution, for example, a surfactant such as polyoxyethylene alkyl ether can be added and mixed in an appropriately adjusted amount during the preparation of the processing solution or raw material emulsion. Specifically, the average particle size of the emulsion particles can be made smaller by increasing the amount of surfactant added.

[0062] [Second Embodiment: Inkjet Printing Apparatus] Next, an inkjet printing apparatus 10 according to the second embodiment of this disclosure will be described with reference to Figure 1. For ease of understanding, Figure 1 schematically shows each component. The size, number, etc. of each component shown may be changed as appropriate. Figure 1 is a side view showing the main parts of an inkjet printing apparatus 10, which is an example of an inkjet printing apparatus according to the second embodiment. The inkjet printing apparatus 10 shown in Figure 1 is a flatbed type inkjet printing apparatus.

[0063] The inkjet printing apparatus 10 according to the second embodiment processes the object to be printed P using the processing solution according to the first embodiment. Because the processing solution according to the first embodiment is used, for the same reasons as described in the first embodiment, the inkjet printing apparatus 10 can produce printed materials with excellent dry rubbing fastness and wet rubbing fastness, and can suppress a decrease in the tactile feel of the printed material.

[0064] The inkjet printing apparatus 10 shown in Figure 1 comprises a recording head 1, a processing head 2, and a mounting table 3. The recording head 1 has a first recording head 1a, a second recording head 1b, a third recording head 1c, and a fourth recording head 1d.

[0065] The recording head 1 ejects ink onto the image forming area of ​​the print target P. The first recording head 1a, second recording head 1b, third recording head 1c, and fourth recording head 1d of the recording head 1 each eject ink of a different color (for example, yellow ink, magenta ink, cyan ink, and black ink). The recording head 1 is not particularly limited, but examples include a piezo type head and a thermal inkjet type head.

[0066] The processing head 2 discharges a processing solution onto at least the image-forming region of the printing target P. The processing solution is the processing solution according to the first embodiment. The processing head 2 is not particularly limited, but examples include a piezo type head and a thermal inkjet type head.

[0067] The printing target P is placed on the mounting table 3. A recording head 1 and a processing head 2 are positioned above the mounting table 3 so that ink and processing liquid can be dispensed onto the printing target P. Driven by a motor (not shown), the mounting table 3 moves horizontally in the direction from the recording head 1 to the processing head 2 (for example, to the left in Figure 1). As the mounting table 3 moves horizontally, the printing target P on the mounting table 3 is transported.

[0068] The fabric to be printed P may be woven or knitted. Examples of fabrics to be printed P include cotton, silk, linen, acetate, rayon, nylon, polyurethane, and polyester.

[0069] In the preparation of a printed material, first, the mounting platform 3 on which the material to be printed P is placed moves horizontally, and the material to be printed P is transported to a position facing the recording head 1. Ink is ejected from the recording head 1 into the image forming area of ​​the material to be printed P. In this way, an image is formed on the image forming area of ​​the material to be printed P by the ink. After the ink is ejected, the mounting platform 3 on which the material to be printed P is placed moves horizontally again, and the material to be printed P is transported to a position facing the processing head 2. Processing liquid is ejected from the processing head 2 into at least the image forming area of ​​the material to be printed P. In this way, a processing film is formed on the image formed on the image forming area of ​​the material to be printed P by the processing liquid.

[0070] The processing head 2 may dispense the processing liquid only to the image-forming area of ​​the print target P. Alternatively, the processing head 2 may dispense the processing liquid over an area wider than the image-forming area of ​​the print target P, or it may dispense the processing liquid over the entire surface of the print target P. To reduce the amount of processing liquid used and suppress the deterioration of the tactile feel of the printed material, it is preferable for the processing head 2 to dispense the processing liquid only to the image-forming area of ​​the print target P. Furthermore, for the same reason, it is even more preferable for the processing head 2 to dispense the processing liquid only to the area within the image-forming area where ink has been dispensed by the recording head 1. Since the processing head 2 can accurately control the position where the processing liquid is dispensed, it is possible to dispense the processing liquid only to the area where ink has been dispensed. In order to accurately control the position where the processing liquid is dispensed, it is preferable that the distance between the processing head 2 and the print target P is 1 mm or more and 5 mm or less. In addition, in order to efficiently carry out post-processing with the processing liquid, it is preferable that only the processing liquid is dispensed from the processing head 2.

[0071] After the processing liquid is discharged from the processing head 2 to the printing target P, the mounting table 3 on which the printing target P is placed moves horizontally further to transport the printing target P to a position facing the heating unit (not shown). The heating unit heats the printing target P, drying the ink and processing liquid. The heating temperature is, for example, between 120°C and 180°C. The heating time is, for example, between 1 minute and 10 minutes. Heating causes volatile components contained in the ink and processing liquid to evaporate, promoting the fixation of the ink and processing liquid to the printing target P. As a result, a printed product is produced in which an image is formed by the ink and the printing target P is processed by the processing liquid.

[0072] The inkjet printing apparatus 10 according to the second embodiment has been described above. However, the inkjet printing apparatus of this disclosure is not limited to the inkjet printing apparatus 10 described above, and can be modified as shown in the following modifications, for example.

[0073] Regarding the first modification, the inkjet printing apparatus 10 may be equipped with a spray for dispensing the processing liquid instead of a processing head 2 for ejecting the processing liquid.

[0074] Regarding the second modification, the treatment with the treatment solution may be carried out by immersing the object to be printed P in a tank in which the treatment solution is stored. When immersion is performed, the amount of treatment solution discharged, as described later in the third embodiment, corresponds to the amount of treatment solution applied.

[0075] Regarding the third modification, in the above-described embodiment, the mounting base 3 moved horizontally, but the recording head 1 and processing head 2 may move horizontally while the mounting base 3 is fixed.

[0076] Regarding the fourth modification, the mounting table 3 may move horizontally in the transport direction of the object to be printed P, or the recording head 1 and processing head 2 may move horizontally, and the recording head 1 and processing head 2 may also move horizontally in a direction perpendicular to the transport direction of the object to be printed P.

[0077] Regarding the fifth modified example, the number of recording heads 1 may be 1 to 3 or 5 or more.

[0078] Regarding the sixth modification, the inkjet printing apparatus may not be a flatbed type. As long as it is equipped with a recording head 1 and a processing head 2, the effects of using the processing liquid according to the first embodiment can be obtained regardless of the type of inkjet printing apparatus.

[0079] [Third Embodiment: Inkjet Printing Method] Next, with reference to Figure 1, the inkjet printing method according to the third embodiment of this disclosure will be described. The inkjet printing method according to the third embodiment uses the processing solution according to the first embodiment to form an image in the image-forming area of ​​the printing target P. The inkjet printing method according to the third embodiment also uses the inkjet printing apparatus 10 according to the second embodiment to form an image in the image-forming area of ​​the printing target P. Because the inkjet printing method according to the third embodiment uses the processing solution according to the first embodiment, for the same reasons as described in the first embodiment, it is possible to produce a printed material with excellent dry rubbing fastness and wet rubbing fastness, and to suppress a decrease in the tactile feel of the printed material.

[0080] The inkjet printing method according to the third embodiment includes an ink ejection step and a processing step. In the ink ejection step, ink is ejected from the recording head 1 onto the image forming area of ​​the printing target P. In the processing step, a processing liquid is ejected from the processing head 2 onto at least the image forming area of ​​the printing target P. The processing liquid is the processing liquid according to the first embodiment. The processing step is performed, for example, after the ink ejection step. The inkjet printing method may further include a heating step as needed.

[0081] In the ink ejection process, the amount of ink ejected to the printing target P is, for example, 5 g / m². 2 More than 40g / m 2 The following applies:

[0082] In the processing step, the amount of processing solution discharged to the object to be printed P is, for example, 10 g / m². 2 More than 120g / m 2 The following applies (including when applied by coating): To particularly improve dry friction fastness, the discharge rate of the treatment solution is 15 g / m². 2 More than 30g / m 2 Preferably, the following conditions apply: In order to particularly improve wet friction fastness in addition to dry friction fastness, the discharge rate of the treatment solution is 17 g / m². 2 More than 25g / m 2 The following is more preferable. The inkjet printing method according to the third embodiment has been described above with reference to Figure 1.

[0083] [Inks used in the second and third embodiments] Next, the inks used in the second and third embodiments described above will be explained. The inks include, for example, a pigment and an aqueous medium. The inks may further contain, if necessary, at least one selected from the group consisting of surfactants, polyols, and binder resin particles.

[0084] (Pigment) Pigments exist dispersed in an aqueous medium, for example. From the viewpoint of obtaining an ink with excellent image density, hue, and color stability, the D of the pigment 50 The wavelength is preferably between 30 nm and 250 nm, and more preferably between 70 nm and 160 nm.

[0085] Examples of pigments include yellow, orange, red, blue, purple, and black pigments. Examples of yellow pigments include CI Pigment Yellow (74, 93, 95, 109, 110, 120, 128, 138, 139, 151, 154, 155, 173, 180, 185, and 193). Examples of orange pigments include CI Pigment Orange (34, 36, 43, 61, 63, and 71). Examples of red pigments include CI Pigment Red (122 and 202). Examples of blue pigments include CI Pigment Blue (15, more specifically 15:3). Examples of purple pigments include CI Pigment Violet (19, 23, and 33). Examples of black pigments include CI Pigment Black (7).

[0086] The pigment content is preferably 1% to 12% by mass, and more preferably 1% to 7% by mass, relative to the mass of the ink. A pigment content of 1% by mass or more improves the image density of the printed material. Furthermore, a pigment content of 12% by mass or less yields an ink with high fluidity.

[0087] (aqueous medium) The aqueous medium contained in the ink is the same as the aqueous medium contained in the processing solution described in the first embodiment. The content of the aqueous medium is preferably 5% by mass or more and 70% by mass or less, and more preferably 40% by mass or more and 60% by mass or less, relative to the mass of the ink.

[0088] (Surfactants) The inclusion of a surfactant in the ink improves the wettability of the ink to the printing surface. Examples of surfactants include anionic surfactants, cationic surfactants, nonionic surfactants, and amphoteric surfactants. The surfactant contained in the ink is preferably a nonionic surfactant. The nonionic surfactant is preferably a surfactant having an acetylene glycol structure, and more preferably an acetylenediol ethylene oxide adduct. The HLB value of the surfactant is preferably 3 to 20, more preferably 6 to 16, and even more preferably 7 to 10. The HLB value of the surfactant can be calculated, for example, by the Griffin method using the formula "HLB value = 20 × (sum of formula weights of hydrophilic parts) / molecular weight". In order to improve image density while suppressing image offset, the surfactant content is preferably 0.1% to 5.0% by mass, and more preferably 0.5% to 2.0% by mass, relative to the mass of the ink.

[0089] (Polyol) The viscosity of the ink is suitably adjusted by the inclusion of a polyol. The polyol contained in the ink is the same as the polyol contained in the processing solution described in the first embodiment. When the ink contains a polyol, in order to suitably adjust the viscosity of the ink, the polyol content is preferably 5% by mass or more and 60% by mass or less, and more preferably 20% by mass or more and 50% by mass or less, relative to the mass of the ink.

[0090] (Binder resin particles) Binder resin particles exist dispersed in an aqueous medium. These particles function as a binder, binding the printing target and the pigment. Therefore, by including binder resin particles in the ink, it is possible to obtain printed materials with excellent pigment fixation.

[0091] Examples of resins contained in the binder resin particles include urethane resin, (meth)acrylic resin, styrene-(meth)acrylic resin, styrene-maleic acid copolymer, vinylnaphthalene-(meth)acrylic acid copolymer, and vinylnaphthalene-maleic acid copolymer. Urethane resin is preferred as the resin contained in the binder resin particles. The content of urethane resin in the binder resin particles is preferably 80% by mass or more, and more preferably 100% by mass.

[0092] The binder resin content is preferably 1% to 20% by mass, and more preferably 2% to 10% by mass, relative to the mass of the ink. When the binder resin particle content is 1% by mass or more, a printing target with excellent pigment fixation can be obtained. On the other hand, when the binder resin particle content is 20% by mass or less, the ink can be stably dispensed onto the printing target.

[0093] (Additives) The ink may further contain known additives as needed (more specifically, dissolving stabilizers, drying inhibitors, antioxidants, viscosity modifiers, pH adjusters, and fungicides, etc.).

[0094] (Ink manufacturing method) Ink is manufactured, for example, by mixing pigment, an aqueous medium, and optionally added components (e.g., surfactants, polyols, and binder resin particles) using a stirrer. The mixing time is, for example, between 1 minute and 30 minutes.

[0095] [Summary of this disclosure] The inkjet processing solution relating to the first aspect of this disclosure comprises an emulsion containing silicone oil and an aqueous medium. The silicone oil includes ionic group-containing silicone oil and unmodified silicone oil.

[0096] This inkjet processing solution suppresses the deterioration of the tactile feel of printed materials and enables the production of printed materials with excellent dry and wet rubbing fastness.

[0097] In the inkjet processing solution described above, the emulsion particles may include first emulsion particles containing the ionic group-containing silicone oil and second emulsion particles containing the unmodified silicone oil.

[0098] This configuration makes it possible to produce printed materials with particularly excellent wet rubbing fastness.

[0099] Alternatively, in the inkjet processing solution described above, the emulsion particles may include emulsion particles containing both the ionic group-containing silicone oil and the unmodified silicone oil.

[0100] This configuration allows for more reliable suppression of the deterioration of the tactile feel of the printed material, and more reliable production of printed materials with excellent dry and wet rubbing fastness.

[0101] In the aforementioned inkjet processing solution, the ratio of the unmodified silicone oil to the ionic group-containing silicone oil in the inkjet processing solution may be 0.33 or more and 1 or less.

[0102] This configuration allows for more reliable suppression of the deterioration of the tactile feel of the printed material, and more reliable production of printed materials with excellent dry and wet rubbing fastness.

[0103] In the aforementioned inkjet processing solution, the viscosity of the ionic group-containing silicone oil is 500 mm². 2 / s or longer is also acceptable.

[0104] This configuration makes it difficult for silicone oil to detach from the printed material due to friction, and allows for the production of printed materials with excellent dry and wet friction fastness, particularly in terms of wet friction fastness.

[0105] In the inkjet processing solution described above, the ionic group-containing silicone oil may include at least one selected from the group consisting of carboxy-modified silicone oil, amino-modified silicone oil, phenol-modified silicone oil, and silanol-modified silicone oil.

[0106] By including at least one ionic group-containing silicone oil selected from the group consisting of these, the deterioration of the tactile feel of the printed material can be more reliably suppressed, and printed materials with excellent dry rubbing fastness and wet rubbing fastness, especially wet rubbing fastness, can be produced more reliably.

[0107] In the aforementioned inkjet processing solution, the viscosity of the unmodified silicone oil is 300 mm. 2 / s or longer is also acceptable.

[0108] This configuration makes it difficult for silicone oil to detach from the printed material due to friction, and allows for the production of printed materials with excellent dry and wet friction fastness, particularly in terms of dry friction fastness.

[0109] In the aforementioned inkjet processing solution, the unmodified silicone oil may also contain dimethylpolysiloxane.

[0110] By including dimethylpolysiloxane in the unmodified silicone oil, the deterioration of the tactile feel of the printed material can be more reliably suppressed, and printed materials with excellent dry and wet rubbing fastness, especially dry rubbing fastness, can be produced more reliably.

[0111] The aforementioned inkjet processing solution may also be used for textile printing.

[0112] By using the aforementioned inkjet processing solution for textile printing, the effects of suppressing the deterioration of tactile feel and achieving excellent friction fastness on the printed material can be more effectively demonstrated.

[0113] An inkjet printing apparatus according to the second aspect of this disclosure comprises a recording head that ejects ink onto an image forming area of ​​a printing target, and a processing head that ejects a processing liquid onto at least the image forming area of ​​the printing target, The aforementioned processing solution is an inkjet processing solution relating to the first aspect of this disclosure.

[0114] Because this inkjet printing apparatus uses an inkjet processing solution relating to the first aspect of this disclosure, it is possible to produce printed materials with suppressed deterioration of tactile feel, and to produce printed materials with excellent dry and wet rubbing fastness.

[0115] An inkjet printing method relating to the third aspect of this disclosure includes an ink ejection step of ejecting ink from a recording head onto an image forming area of ​​a printing target, and a processing step of ejecting a processing liquid from a processing head onto at least the image forming area of ​​the printing target, The aforementioned processing solution is an inkjet processing solution relating to the first aspect of this disclosure.

[0116] Because this inkjet printing method uses an inkjet processing solution relating to the first aspect of this disclosure, it is possible to produce printed materials with suppressed deterioration of tactile feel, and to produce printed materials with excellent dry and wet rubbing fastness. [Examples]

[0117] The present disclosure will be further described below with reference to examples, but the present disclosure is not limited in any way by these examples.

[0118] In this example, various printed materials were prepared by changing the type and content ratio of ionic group-containing silicone oil and unmodified silicone oil in the inkjet processing solution, and the suppression of the reduction in friction fastness and tactile feel of the printed materials was evaluated.

[0119] [Method for preparing the treatment solution] The treatment solutions (A-1) and (A-2) used in this evaluation test were prepared by the method described below. The silicone oil content was calculated by rounding to the first decimal place.

[0120] <Preparation of treatment solution (A-1)> First, raw material emulsion A, which is contained in the processing solution (A-1), was prepared. Specifically, 180g of unmodified silicone oil (specifically dimethylpolysiloxane) (Shin-Etsu Chemical Co., Ltd. "KF96-3000cs", viscosity: 3,000mm) was used. 2 (L / s, specific gravity: 0.97), and 120 g of phenol-modified silicone oil (Shin-Etsu Chemical Co., Ltd. "KF2201", viscosity: 97 m / s). 2 Mix (s, specific gravity: 0.99, functional group equivalent: 1,474 g / mol) and adjust viscosity to 1,000 mm². 2 A mixture MD was obtained at a concentration of / s. 300 g of mixture MD, 600 g of deionized water, and 100 g of aqueous sodium hydroxide solution (concentration 1 mol / L) were placed in a beaker. The contents of the beaker were stirred for 15 minutes at a rotation speed of 10,000 rpm using a homogenizer (IKA "Ultra-Turrax T25"), and then allowed to stand for 30 minutes. The contents of the beaker were then filtered through a 120-mesh stainless steel filter to obtain raw material emulsion A. Raw material emulsion A contained dispersed emulsion particles containing both unmodified silicone oil and phenol-modified silicone oil. The average particle size of the emulsion particles contained in raw material emulsion A was 160 nm.

[0121] Next, treatment solution (A-1) was prepared using the raw material emulsion A prepared as described above. Specifically, 33.30 g of raw material emulsion A (content of a mixture of phenol-modified silicone oil and unmodified silicone oil: 30% by mass), 33.35 g of deionized water, and 33.35 g of propylene glycol were mixed to obtain treatment solution (A-1). In treatment solution (A-1), the total content of phenol-modified silicone oil and unmodified silicone oil was 10% by mass.

[0122] <Preparation of treatment solution (A-2)> First, raw material emulsion B, which is contained in the processing solution (A-2), was prepared. Specifically, 180g of unmodified silicone oil (specifically dimethylpolysiloxane) (Shin-Etsu Chemical Co., Ltd. "KF96-3000cs", viscosity: 3,000mm) was used. 2 (L / s, specific gravity: 0.97), and 120 g of silanol-modified silicone oil (Shin-Etsu Chemical Co., Ltd. "KF9701", viscosity: 60 mm²). 2 Mix ( / s, specific gravity: 0.977, functional group equivalent: 1,500 g / mol) to a viscosity of 1,200 mm². 2 A mixture ME was obtained at a concentration of / s. 300 g of mixture ME, 600 g of deionized water, and 100 g of sodium hydroxide aqueous solution (concentration 1 mol / L) were placed in a beaker. The contents of the beaker were stirred for 15 minutes at a rotation speed of 10,000 rpm using a homogenizer (IKA "Ultra-Turrax T25"), and then allowed to stand for 30 minutes. The contents of the beaker were then filtered through a 120-mesh stainless steel filter to obtain raw material emulsion B. Raw material emulsion B contained dispersed emulsion particles containing both unmodified silicone oil and silanol-modified silicone oil. The average particle size of the emulsion particles contained in raw material emulsion B was 220 nm.

[0123] Next, treatment solution (A-2) was prepared using raw material emulsion B prepared as described above. Specifically, treatment solution (A-2) was obtained in the same manner as treatment solution (A-1), except that raw material emulsion A (content of a mixture of phenol-modified silicone oil and unmodified silicone oil: 30% by mass) was changed to raw material emulsion B (content of a mixture of silanol-modified silicone oil and unmodified silicone oil: 30% by mass). In treatment solution (A-2), the total content of silanol-modified silicone oil and unmodified silicone oil was 10% by mass.

[0124] The types of raw material emulsions, the method of preparing the processing solutions, the types and content of silicone oils, and the viscosity of the silicone oils for processing solutions (A-1) and (A-2) are summarized in Table 1 below.

[0125] [Table 1]

[0126] In Table 1 and Table 3 shown later, the meanings of each term are as follows: "Quantity" indicates the content of silicone oil in the processing solution. "wt%" indicates mass percent. "Viscosity" indicates the viscosity of the silicone oil. If the emulsion particles contain two or more types of silicone oil, "viscosity" indicates the viscosity of the mixture of the two or more types of silicone oil (because the "method of preparing the processing solution" described below is "i").

[0127] Furthermore, in Table 1 above and Table 3 below, "i" in "Method for preparing the processing solution" refers to a method in which ionic group-containing silicone oil and unmodified silicone oil are mixed from the raw material emulsion preparation stage. Therefore, in this method, the final processing solution obtained will contain emulsion particles containing both ionic group-containing silicone oil and unmodified silicone oil. On the other hand, in Table 3 below only, "ii" in "Method for preparing the processing solution" refers to a method in which raw material emulsions of ionic group-containing silicone oil and unmodified silicone oil are prepared separately, and then both emulsions are mixed. Therefore, in this method, the final processing solution obtained will contain first emulsion particles containing ionic group-containing silicone oil and second emulsion particles containing unmodified silicone oil.

[0128] As shown in Table 1 above, both processing solution (A-1) and processing solution (A-2) contain emulsified particles containing silicone oil and an aqueous medium, and the silicone oil includes ionic group-containing silicone oil and unmodified silicone oil.

[0129] [Measurement methods for each physical property] The average particle size of the emulsion particles in the raw material emulsion and the viscosity of the silicone oil were measured by the method described below.

[0130] <Measurement of average particle size of emulsified particles> The average particle size of the emulsion particles was measured using a laser diffraction particle size distribution analyzer (Malvern's "Zetasizer Nano ZS") in accordance with the method described in ISO 13321:1996 (Particle size analysis - Photon correlation spectroscopy). For the measurement of the average particle size of the emulsion particles, a sample was used in which the processing solution or the raw material emulsion (when two different raw material emulsions are mixed) was diluted 1000 times with water. The average particle size of the emulsion particles contained in the raw material emulsion and the average particle size of the emulsion particles contained in the processing solution are approximately the same.

[0131] <Measuring the viscosity of silicone oil> The viscosity of the silicone oil was measured in an environment of 25°C in accordance with the method described in JIS Z8803:2011 (Method for measuring the viscosity of liquids). An Ubbelohde viscometer, as described in "6.2.3 Ubbelohde Viscometer" of JIS Z8803:2011, was used to measure the viscosity of the silicone oil.

[0132] [Evaluation Method] The suppression of the reduction in friction fastness and tactile feel of various printed materials was evaluated using each prepared treatment solution. Specifically, evaluation inks and evaluation printed materials were prepared using these evaluation inks and each treatment solution, and the suppression of the reduction in friction fastness and tactile feel was evaluated. The details of the preparation method for the evaluation inks, the preparation method for the evaluation printed materials, and the various evaluation methods are described below.

[0133] <Method for preparing evaluation ink> Ink a, used for evaluating the processing solution, was prepared by the method described below.

[0134] (Method for preparing ink a) 125 g of deionized water and 2 g of nonionic surfactant (Surfinol® 440, manufactured by Nisshin Chemical Industry Co., Ltd., contents: acetylene glycol ethylene oxide adduct) were placed in a 1 L three-necked flask equipped with a stirring blade. While stirring the contents of the flask, 165 g of propylene glycol, 100 g of black pigment dispersion (AE2078F, manufactured by Sanyo Shikiso Co., Ltd., contents: CIPigment Black 7, solid content concentration: 20% by mass), and 108 g of binder resin particle dispersion (Superflex 470, manufactured by Daiichi Kogyo Seiyaku Co., Ltd., contents: polyurethane dispersion, solid content concentration: 38% by mass) were added to the flask in order. The contents of the flask were stirred for 10 minutes to obtain ink a.

[0135] <Method for preparing printable samples for evaluation> Evaluation prints were prepared using the inks and processing solutions shown in Table 2 below. For example, processing solution (A-1) and ink a were used to evaluate Example 1-1 in Table 2.

[0136] The fabric to be printed is cotton broadcloth (manufactured by Irozome Co., Ltd., size: A4, warp and weft cotton count: 40 / 1, warp density: 130 threads / inch, weft density: 75 threads / inch, weight: 122g / m²). 2 An inkjet printer (Seiko Epson Corporation's "Colorio® PX-045A") was used to prepare the evaluation prints. Ink was filled into the first ink chamber of the first cartridge. Processing solution was filled into the second ink chamber of the second cartridge. The first and second cartridges were installed in the inkjet printer. The ink filled into the first ink chamber is ejected from the inkjet printer's recording head. The processing solution filled into the second ink chamber is ejected from the inkjet printer's processing head.

[0137] Using an inkjet printer, the ink ejection rate is 20 g / m². 2 In this manner, ink was ejected from the recording head onto the printing target to form a solid image of ink. Next, using an inkjet printer, the ejection rate of the processing solution was 20 g / m² as described above. 2 The processing solution was discharged from the processing head onto the object to be printed. In this way, a processing film the same size as the solid image was formed on the solid image of the ink by the processing solution. Next, the object to be printed was heated at 160°C for 3 minutes to dry the ink and processing solution, and an evaluation print was obtained.

[0138] <Evaluation of frictional hardness> The solid image formed on the evaluation print was rubbed using a white cotton cloth for friction, according to the dry and wet tests of the Type II (JSPS type) friction test machine described in JIS L-0849:2013 (Test method for color fastness to friction). The degree of discoloration of the white cotton cloth for friction after friction was evaluated in accordance with the "criteria for determining discoloration" described in Clause 10 (Determination of color fastness) of JIS L-0801:2011 (General rules for test method for color fastness). The degree of discoloration of the white cotton cloth for friction was judged on a 9-point scale (in descending order of degree of staining: Grade 1, Grade 1-2, Grade 2, Grade 2-3, Grade 3, Grade 3-4, Grade 4, Grade 4-5, and Grade 5). The lower the degree of discoloration of the white cotton cloth for friction (closer to Grade 5), the better the color fastness. From the degree of discoloration of the white cotton cloth for friction after the friction test, the dry color fastness and wet color fastness were evaluated according to the following criteria. The result of the dry test described above was defined as the dry rubbing fastness, and the result of the wet test described above was defined as the wet rubbing fastness. A rating of A or B was considered a pass, and a rating of C was considered a fail. The determined rubbing fastness and its evaluation results are summarized in Table 2 below.

[0139] (Evaluation criteria for dry friction fastness) Rating A: Dry friction fastness is grade 4 or higher. Rating B: Dry friction fastness is grade 3-4. Rating C: Dry friction fastness is grade 3 or lower.

[0140] (Evaluation criteria for wet friction fastness) Rating A: Wet abrasion fastness is Grade 3 or higher. Rating B: Wet abrasion fastness is grade 2-3. Rating C: Wet abrasion fastness is 2nd grade or lower.

[0141] <Evaluation regarding the suppression of the decline in tactile sensation> An unused printable object was folded in half along the warp threads (lengthwise), and the distance between the lower and upper layers of fabric at the fold (loop height) was measured. The measured loop height of the unused printable object was defined as the loop height before printing. Next, the region where the solid image of the evaluation print was formed was folded in half along the warp threads (lengthwise), and the loop height was measured. The measured loop height of the evaluation print was defined as the loop height after printing. The percentage change in loop height before and after printing (in %) was calculated according to the formula "Percentage change in loop height = 100 × Loop height after printing / Loop height before printing". A lower percentage change in loop height indicates that the printable object does not harden or swell after printing, thus suppressing the deterioration of the tactile feel of the printable object. Based on the percentage change in loop height, whether or not the deterioration of the tactile feel of the printable object was suppressed was evaluated according to the following criteria. A rating of A or B was considered a pass, and a rating of C was considered a fail. The measured rate of change in loop height and the evaluation results regarding the suppression of tactile degradation are summarized in Table 2 below.

[0142] (Evaluation criteria for suppressing the decline in tactile sensation) Evaluation A: The rate of change in loop height is 125% or less. Evaluation B: The rate of change in loop height is between 125% and 130%. Evaluation C: The rate of change in loop height exceeds 130%.

[0143] [Table 2]

[0144] In Table 2 above and Table 3 below, the meanings of each term are as follows: "Tactile feel" indicates an evaluation of the suppression of the deterioration of the tactile feel of the printed material. "Height" indicates the rate of change in loop height before and after printing. In the column for friction fastness, "1-2", "2-3", "3-4", and "4-5" indicate the degree of coloring of the white cotton cloth used for friction as grades 1-2, 2-3, 3-4, and 4-5, respectively.

[0145] [Consideration] As shown in Table 2 above, the dry rubbing fastness, wet rubbing fastness, and suppression of deterioration in tactile feel of the printed materials produced using processing solution (A-1) and processing solution (A-2) were all evaluated as A or B. Regarding rubbing fastness, the dry rubbing fastness was particularly excellent. Therefore, it is determined that the inkjet processing solution in this embodiment, which includes processing solution (A-1) and processing solution (A-2), can produce printed materials with excellent dry rubbing fastness and wet rubbing fastness, and can suppress deterioration in the tactile feel of the printed materials.

[0146] 3. Evaluation test of friction fastness when the combination of ionic group-containing silicone oil and non-modified silicone oil, their content ratios, and the preparation method of the treatment solution are changed. In this study, various printed materials were prepared by varying the combination of ionic group-containing silicone oil and unmodified silicone oil contained in the processing solution, their respective content ratios, and the method of preparing the processing solution. Subsequently, the rubbing fastness of the various printed materials was evaluated.

[0147] [Method for preparing the treatment solution] In this study, we used treatment solutions with varying combinations of carboxy-modified silicone oil, amino-modified silicone oil, and unmodified silicone oil (dimethylpolysiloxane), their respective content ratios, and the method of preparing the treatment solution. The detailed preparation methods for treatment solutions (B-1) to (B-5), as well as treatment solutions (C-1) and (C-2), used in this study are described below.

[0148] <Preparation of treatment solution (B-1)> First, two raw material emulsions contained in the processing solution (B-1) were prepared. Specifically, 300g of carboxy-modified silicone oil (Shin-Etsu Chemical Co., Ltd. "X-22-3701E", viscosity: 2,000mm) was prepared. 2570 g of deionized water (600 g / mol, specific gravity: 0.98, functional group equivalent: 4,000 g / mol), 50 g of sodium hydroxide aqueous solution (concentration: 1 mol / L), and 80 g of surfactant (polyoxyethylene alkyl ether) were placed in a beaker. The contents of the beaker were stirred for 15 minutes at a rotation speed of 10,000 rpm using a homogenizer (IKA "Ultra-Turrax T25"), and then allowed to stand for 30 minutes. Next, the contents of the beaker were filtered through a 120-mesh stainless steel filter to obtain the first raw material emulsion. This first raw material emulsion contained dispersed first emulsion particles containing carboxy-modified silicone oil. The average particle size of the first emulsion particles containing carboxy-modified silicone oil was 102 nm.

[0149] Next, 300g of unmodified silicone oil (specifically, dimethylpolysiloxane) (Shin-Etsu Chemical Co., Ltd. "KF96-3000cs", viscosity: 3,000mm) 2 610 g of deionized water (600 s, specific gravity: 0.97) and 90 g of surfactant (polyoxyethylene alkyl ether) were placed in a beaker. The contents of the beaker were stirred for 15 minutes at a rotation speed of 10,000 rpm using a homogenizer (IKA "Ultra-Turrax T25") and then allowed to stand for 30 minutes. Next, the contents of the beaker were filtered through a 120-mesh stainless steel filter to obtain a second raw material emulsion. The second raw material emulsion contained dispersed second emulsion particles containing unmodified silicone oil. The average particle size of the second emulsion particles containing unmodified silicone oil was 115 nm.

[0150] Next, a treatment solution (B-1) was prepared using the first and second raw material emulsions prepared as described above. Specifically, 25 g of the first raw material emulsion (carboxy-modified silicone oil content: 30% by mass), 8.33 g of the second raw material emulsion (unmodified silicone oil content: 30% by mass), 33.32 g of deionized water, and 33.35 g of propylene glycol were mixed to obtain treatment solution (B-1). In treatment solution (B-1), the carboxy-modified silicone oil content was 7.5% by mass, and the unmodified silicone oil content was 2.5% by mass.

[0151] <Preparation of treatment solution (B-2)> In preparing treatment solution (B-2), the method was the same as for treatment solution (B-1), except that during the final mixing of the first and second raw material emulsions, the amount of the first raw material emulsion (containing carboxy-modified silicone oil: 30% by mass) was changed to 16.67 g, and the amount of the second raw material emulsion (containing unmodified silicone oil: 30% by mass) was also changed to 16.67 g. Treatment solution (B-2) contained 5% by mass of carboxy-modified silicone oil and 5% by mass of unmodified silicone oil.

[0152] <Preparation of treatment solution (B-3)> In preparing treatment solution (B-3), the method was the same as for treatment solution (B-1), except that during the final mixing of the first and second raw material emulsions, the amount of the first raw material emulsion (containing carboxy-modified silicone oil: 30% by mass) was changed to 8.33 g, and the amount of the second raw material emulsion (containing unmodified silicone oil: 30% by mass) was changed to 25 g. Treatment solution (B-3) was obtained using the same method as for treatment solution (B-1). In treatment solution (B-3), the content of carboxy-modified silicone oil was 2.5% by mass, and the content of unmodified silicone oil was 7.5% by mass.

[0153] <Preparation of treatment solution (B-4)> First, the raw material emulsion contained in the processing solution (B-4) was prepared. Specifically, 150g of unmodified silicone oil (specifically, dimethylpolysiloxane) (Shin-Etsu Chemical Co., Ltd. "KF96-3000cs", viscosity: 3,000mm) was used. 2 (L / s, specific gravity: 0.97), 150g of carboxy-modified silicone oil (Shin-Etsu Chemical Co., Ltd. "X-22-3701E", viscosity: 2,000mm) 2 610 g of deionized water (1 mol / L sodium hydroxide solution, 0.98 saturates, 4,000 g / mol functional group equivalent), 10 g of sodium hydroxide aqueous solution (1 mol / L concentration), and 90 g of surfactant (polyoxyethylene alkyl ether) were placed in a beaker. The contents of the beaker were stirred for 15 minutes at a rotation speed of 10,000 rpm using a homogenizer (IKA "Ultra-Turrax T25"), and then allowed to stand for 30 minutes. The contents of the beaker were then filtered through a 120-mesh stainless steel filter to obtain the raw material emulsion. The raw material emulsion contained dispersed emulsion particles containing both carboxy-modified silicone oil and unmodified silicone oil. The average particle size of the emulsion particles containing both carboxy-modified and unmodified silicone oil was 110 nm.

[0154] Next, treatment solution (B-4) was prepared using the raw material emulsion prepared as described above. Specifically, 33.33 g of the above raw material emulsion (content of a mixture of carboxy-modified silicone oil and unmodified silicone oil: 30% by mass), 33.32 g of deionized water, and 33.35 g of propylene glycol were mixed to obtain treatment solution (B-4). In treatment solution (B-4), the content of carboxy-modified silicone oil was 5% by mass, and the content of unmodified silicone oil was 5% by mass.

[0155] <Preparation of treatment solution (B-5)> In the preparation of the processing solution (B-5), amino-modified silicone oil was used instead of carboxy-modified silicone oil when preparing the first raw material emulsion. Specifically, 300g of amino-modified silicone oil (Shin-Etsu Chemical Co., Ltd. "KF-864", viscosity: 1,700mm) was first used. 2 600 g of deionized water and 100 g of hydrochloric acid (concentration: 1 mol / L) were placed in a beaker. The contents of the beaker were then stirred for 15 minutes at a rotation speed of 10,000 rpm using a homogenizer (IKA "Ultra-Turrax T25") and allowed to stand for 30 minutes. Next, the contents of the beaker were filtered through a 120-mesh stainless steel filter to obtain the first raw material emulsion. The first raw material emulsion contained dispersed emulsion particles of amino-modified silicone oil. The average particle size of the emulsion particles contained in the first raw material emulsion was 150 nm. Treatment solution (B-5) was obtained by the same method as treatment solution (B-2), except that the raw material emulsion containing amino-modified silicone oil prepared in this way was used as the first raw material emulsion. In the processing solution (B-5), the content of amino-modified silicone oil was 5% by mass, and the content of unmodified silicone oil was 5% by mass.

[0156] <Preparation of treatment solution (C-1)> In the preparation of treatment solution (C-1), only the first raw material emulsion prepared in treatment solution (B-1) was used. Specifically, 33.33 g of the first raw material emulsion (carboxy-modified silicone oil content: 30% by mass), 33.32 g of deionized water, and 33.35 g of propylene glycol were mixed to obtain treatment solution (C-1). In treatment solution (C-1), the carboxy-modified silicone oil content was 10% by mass.

[0157] <Preparation of treatment solution (C-2)> In the preparation of treatment solution (C-2), only the second raw material emulsion prepared in treatment solution (B-1) was used. Specifically, 33.33 g of the second raw material emulsion (content of unmodified silicone oil: 30% by mass), 33.32 g of deionized water, and 33.35 g of propylene glycol were mixed to obtain treatment solution (C-2). In treatment solution (C-2), the content of unmodified silicone oil was 10% by mass.

[0158] Next, evaluation prints were prepared using the prepared treatment solutions (B-1) to (B-5), as well as treatment solutions (C-1) and (C-2), and their rubbing fastness was evaluated.

[0159] <Method for preparing evaluation prints for Examples 2-1 to 2-5 and Comparative Examples 2-1 to 2-2> Regarding the preparation of the printed materials for Examples 2-1 to 2-5 and Comparative Examples 2-1 to 2-2, the evaluation printed materials were prepared using the same method as the method for preparing the evaluation printed materials described in Section 1 above, except for the following changes. Specifically, the first ink chamber of the first cartridge was filled with ink a, and the second ink chamber of the second cartridge was filled with one of the processing solutions (B-1) to (B-5) and processing solutions (C-1) to (C-2) shown in Table 3 below. The method for preparing the inks used is the same as the method described in Section 1 above. In each example and comparative example, the discharge amount of the processing solution was set to the amount shown in Table 3 below. The ink discharge amount was 20 g / m². 2 That's what I decided.

[0160] <Evaluation of frictional hardness> The printed materials of Examples 2-1 to 2-5 and Comparative Examples 2-1 to 2-2 were evaluated using the same method as the evaluation of rubbing fastness described in Section 1 above. The evaluation results for the printed materials of each example and comparative example are summarized in Table 3 below.

[0161] The types of ionic group-containing silicone oils and non-modified silicone oils used in each example and comparative example, their content, the method of preparing the treatment solution, and the results of the friction fastness evaluation are summarized in Table 3 below.

[0162] [Table 3]

[0163] [Consideration] As shown in Table 3 above, regardless of the method of preparing the processing solution, Examples 2-1 to 2-5, which used processing solutions (B-1) to (B-5) containing both ionic group-containing silicone oil and unmodified silicone oil as silicone oil, showed excellent dry and wet rubbing fastness. This is presumed to be because the inclusion of ionic group-containing silicone oil forms ionic bonds due to the ionic groups, making the oil less likely to be washed away by water, while the inclusion of unmodified silicone oil further enhances the slipperiness and durability of the film. On the other hand, the printed material of Comparative Example 2-1, which used processing solution (C-1) containing only ionic group-containing silicone oil, showed inferior dry rubbing fastness. Furthermore, the printed material of Comparative Example 2-2, which used processing solution (C-2) containing only unmodified silicone oil, showed significantly inferior wet rubbing fastness.

[0164] Furthermore, regarding the method for preparing the processing solution, method "ii" was able to produce printed materials with particularly superior wet rubbing fastness. The method for "ii" involves preparing separate raw material emulsions of ionic group-containing silicone oil and unmodified silicone oil beforehand, then mixing both emulsions to finally obtain the processing solution. In other words, the emulsion particles in the processing solution contained both a first emulsion particle containing ionic group-containing silicone oil and a second emulsion particle containing unmodified silicone oil, resulting in superior wet rubbing fastness. In addition, when the ratio of unmodified silicone oil to ionic group-containing silicone oil was in the range of 1 / 3 to 1 (approximately 0.33 to 1), printed materials with superior wet rubbing fastness could be produced.

[0165] The embodiments and examples disclosed herein should be understood in all respects to be illustrative and not restrictive. The scope of this disclosure is defined by the claims rather than by the foregoing description, and all modifications within the meaning and scope equivalent to the claims are intended. [Industrial applicability]

[0166] The processing solution, inkjet printing apparatus, and inkjet printing method relating to this disclosure can be used to form printed materials. [Explanation of symbols]

[0167] 1: Recording head 1a: First recording head 1b: Second recording head 1c: Third recording head 1d: 4th recording head 2: Processing head 3: Mounting platform 10: Inkjet printing equipment P: Printing target

Claims

1. A method for producing a first treatment liquid in which first emulsified particles containing an ionic group-containing silicone oil are dispersed in an aqueous medium by mixing and emulsifying an ionic group-containing silicone oil with at least an aqueous medium; mixing and emulsifying the non-modified silicone oil with at least an aqueous medium to obtain a second treatment liquid in which second emulsified particles containing the non-modified silicone oil are dispersed in the aqueous medium; mixing the first treatment liquid and the second treatment liquid.

2. A method for producing a first raw material emulsion containing first emulsified particles by mixing and emulsifying an ionic group-containing silicone oil with at least an aqueous medium; mixing and emulsifying the unmodified silicone oil with at least an aqueous medium to produce a second raw emulsion containing second emulsified particles; mixing the first raw emulsion, the second raw emulsion, and an aqueous medium.

3. A method of emulsifying an ionic group-containing silicone oil and an unmodified silicone oil by mixing them with at least an aqueous medium; and dispersing emulsified particles containing both the ionic group-containing silicone oil and the unmodified silicone oil in the aqueous medium to obtain a treatment liquid containing emulsified particles containing both the ionic group-containing silicone oil and the unmodified silicone oil.

4. A set comprising an inkjet treatment liquid and an ink containing a pigment, The inkjet treatment liquid includes emulsified particles containing silicone oil and an aqueous medium, The silicone oil comprises an ionic group-containing silicone oil and an unmodified silicone oil.

5. The set according to claim 4 , wherein the emulsion particles include first emulsion particles containing the ionic group-containing silicone oil and second emulsion particles containing the unmodified silicone oil.

6. The set according to claim 4 , wherein the emulsified particles include emulsified particles containing both the ionic group-containing silicone oil and the unmodified silicone oil.

7. The set according to claim 4 , wherein the content ratio of the unmodified silicone oil to the ionic group-containing silicone oil in the inkjet treatment liquid is 0.33 or more and 1 or less.

8. The viscosity of the ionic group-containing silicone oil is 500 mm ２ The set according to claim 4, wherein the ratio is equal to or greater than 1 / s.

9. The set according to claim 4, wherein the ionic group-containing silicone oil comprises at least one selected from the group consisting of carboxy-modified silicone oil, amino-modified silicone oil, phenol-modified silicone oil, and silanol-modified silicone oil.

10. The viscosity of the unmodified silicone oil is 300 mm ２ The set according to claim 4, wherein the ratio is equal to or greater than 1 / s.

11. The set of claim 4 , wherein the unmodified silicone oil comprises dimethylpolysiloxane.

12. The set according to any one of claims 4 to 11, which is for textile printing.

13. A printed product in which an image is formed by ejecting ink from a recording head onto an image forming area of ​​a printing target, and a treatment film is formed by ejecting inkjet treatment liquid from a treatment head, The inkjet treatment liquid includes emulsified particles containing silicone oil and an aqueous medium, The silicone oil includes an ionic group-containing silicone oil and a non-modified silicone oil.

14. A printed material as described in Claim 13, wherein the emulsified particles include first emulsified particles containing the ionic group-containing silicone oil and second emulsified particles containing the non-modified silicone oil.

15. A printed material as described in Claim 13, wherein the emulsified particles include emulsified particles containing both the ionic group-containing silicone oil and the unmodified silicone oil.

16. A printed material as described in Claim 13, wherein the content ratio of the unmodified silicone oil to the ionic group-containing silicone oil in the inkjet treatment liquid is 0.33 or more and 1 or less.

17. The printed material according to claim 13, wherein the viscosity of the ionic group-containing silicone oil is 500 mm 2 / s or more.

18. A printed material as described in Claim 13, wherein the ionic group-containing silicone oil includes at least one selected from the group consisting of carboxy-modified silicone oil, amino-modified silicone oil, phenol-modified silicone oil and silanol-modified silicone oil.

19. The printed material according to claim 13, wherein the viscosity of the non-modified silicone oil is 300 mm 2 / s or more.

20. A printed material described in any one of claims 13 to 19, wherein the non-modified silicone oil contains dimethylpolysiloxane.

21. a recording head that ejects ink onto an image forming area of ​​a textile printing target, a processing head that ejects a treatment liquid onto at least the image forming area of ​​the textile printing target, and a cartridge filled with the treatment liquid; The inkjet printing apparatus, wherein the treatment liquid is an inkjet treatment liquid containing emulsified particles containing a silicone oil, which includes an ionic group-containing silicone oil and a non-modified silicone oil, and an aqueous medium.

22. an ink ejection step of ejecting ink from a recording head onto an image formation area of ​​a textile printing target, and a processing step of ejecting a processing liquid from a processing head onto at least the image formation area of ​​the textile printing target, The inkjet printing method, wherein the treatment liquid is an inkjet treatment liquid containing emulsified particles containing a silicone oil, which includes an ionic group-containing silicone oil and a non-modified silicone oil, and an aqueous medium.

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