Inkjet processing liquid, inkjet printing device, and inkjet printing method

Abstract

The invention relates to an ink jet processing liquid, an ink jet printing device and an ink jet printing method. The processing liquid for ink jet contains: emulsified particles containing silicone oil; and an aqueous medium, in which the silicone oil contains an ionic group-containing silicone oil and an unmodified silicone oil.

Description

[0001] This application is a divisional application of PCT / JP2022 / 032479 application with application number: 202280029377.2, application date: 2022.8.30, and invention name: "Inkjet processing liquid, inkjet printing device and inkjet printing method". Technical Field

[0002] The present invention relates to an inkjet processing liquid, an inkjet printing device and an inkjet printing method. Background Art

[0003] In the inkjet printing method, for example, an ink containing a pigment is used. In order to improve the color fastness to rubbing of a printed object (hereinafter sometimes referred to as a printed object) on which an image is formed, the ink containing a pigment is sometimes used together with a post-treatment liquid.

[0004] Meanwhile, conventionally, a transport roller for an inkjet recording device is known (see, for example, Patent Document 1). In the transport roller described in Patent Document 1, a treatment liquid containing one or both of fullerene and a fullerene derivative is applied to the surface of the transport roller.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Publication No. 2013-75524 Summary of the invention

[0008] The first aspect of the present invention relates to an inkjet treatment liquid comprising: emulsified particles containing silicone oil; and an aqueous medium, wherein the silicone oil contains ionic group-containing silicone oil and unmodified silicone oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a side view showing an example of an inkjet printing apparatus according to a second embodiment of the present invention.

[0010] Description of Reference Numerals

[0011] 1: recording head, 1a: first recording head, 1b: second recording head, 1c: third recording head, 1d: fourth recording head, 2: processing head, 3: mounting table, 10: inkjet printing device, P: printing object DETAILED DESCRIPTION

[0012] In recent years, in inkjet printing technology, it is required to further improve the color fastness to rubbing of printed materials. It can be inferred that the color fastness to rubbing of printed materials varies depending on the concentration of silicone oil contained in the treatment liquid, the amount of treatment liquid ejected, etc. For example, in the case where the amount of treatment liquid ejected is small, it can be inferred that if the concentration of silicone oil is too low, the color fastness to rubbing of printed materials may be affected. Therefore, from the perspective of adjusting the concentration of silicone oil, it is advisable to understand the conditions of the characteristics of the inkjet treatment liquid that can produce printed materials with excellent color fastness to rubbing.

[0013] Here, it can be inferred that the color fastness to rubbing of printed materials also varies according to the type of silicone oil contained in the treatment solution. Therefore, from the viewpoint of the type of silicone oil, it is appropriate to understand the conditions for the characteristics of the inkjet treatment solution that can produce printed materials with excellent color fastness to rubbing.

[0014] In addition, the color fastness to rubbing includes the color fastness to dry rubbing and the color fastness to wet rubbing. Depending on the type of silicone oil contained in the treatment liquid, it is often possible to produce a printed article that is specifically used for one of the types and has excellent color fastness to rubbing. Therefore, it is required to produce an inkjet treatment liquid that can produce a printed article that has excellent color fastness to dry rubbing and color fastness to wet rubbing. In addition, it is more preferred if the inkjet treatment liquid can also suppress the deterioration of the touch of the printed article.

[0015] The inkjet treatment liquid of the present invention can suppress the deterioration of the touch of printed materials, and can produce printed materials having excellent color fastness to dry rubbing and color fastness to wet rubbing.

[0016] Next, the embodiments of the present invention will be described. In addition, in this specification, unless otherwise specified, the volume median particle size (D 50 ) is the median particle size measured using a laser diffraction / scattering particle size distribution measuring device ("LA-950" manufactured by Horiba, Ltd.). 50 ". Unless otherwise specified, the "main component" of a material refers to the component with the largest content in the material based on mass. Unless otherwise specified, the "specific gravity" refers to the specific gravity at 25°C. Acrylic acid and methacrylic acid are sometimes collectively referred to as "(meth)acrylic acid". Each component described in this specification may be used alone or in combination of two or more.

[0017] [First embodiment: inkjet treatment liquid]

[0018] Next, the inkjet treatment liquid (hereinafter also referred to as the treatment liquid) according to the first embodiment of the present invention is described. The treatment liquid according to the first embodiment includes emulsified particles and an aqueous medium. The emulsified particles are dispersed in the aqueous medium of the treatment liquid. That is, the treatment liquid according to the first embodiment is an emulsion, more specifically, an oil-in-water (O / W) emulsion.

[0019] The treatment liquid involved in the first embodiment is suitable for use in, for example, an inkjet printing device and an inkjet printing method described later. The treatment liquid involved in the first embodiment is, for example, a treatment liquid for post-processing. Specifically, after an image is formed in an image forming area of ​​a printing object using ink, the treatment liquid involved in the first embodiment is used to post-process the image forming area.

[0020] <Emulsified particles>

[0021] The emulsified particles contained in the treatment liquid contain silicone oil. The silicone oil contains ionic group-containing silicone oil and unmodified silicone oil. In other words, the treatment liquid contains ionic group-containing silicone oil, unmodified silicone oil and an aqueous medium, and the ionic group-containing silicone oil and the unmodified silicone oil are dispersed in the treatment liquid in a state of being contained in the emulsified particles.

[0022] In the inkjet treatment liquid involved in the first embodiment, the emulsified particles containing silicone oil can be classified into three types. Specifically, they can be classified into: emulsified particles containing only ionic group-containing silicone oil as silicone oil; emulsified particles containing only unmodified silicone oil as silicone oil; and emulsified particles containing both ionic group-containing silicone oil and unmodified silicone oil as silicone oil. In more detail, the emulsified particles contained in the treatment liquid may include: first emulsified particles containing ionic group-containing silicone oil, and second emulsified particles containing unmodified silicone oil. Alternatively, the emulsified particles contained in the treatment liquid may include: emulsified particles containing both ionic group-containing silicone oil and unmodified silicone oil (hereinafter also referred to as "third emulsified particles"). Alternatively, the emulsified particles contained in the treatment liquid may include: first emulsified particles containing ionic group-containing silicone oil, second emulsified particles containing unmodified silicone oil, and third emulsified particles containing both ionic group-containing silicone oil and unmodified silicone oil. Among these, from the viewpoint of being able to produce printed articles with more excellent wet rubbing color fastness, the emulsified particles preferably include: first emulsified particles containing ionic group-containing silicone oil, and second emulsified particles containing unmodified silicone oil. By making the silicone oil contained in the emulsified particles contain both ionic group-containing silicone oil and unmodified silicone oil, the following first to fifth advantages are obtained.

[0023] The first advantage is explained. Silicone oil has the effect of reducing friction. By post-treating the printed object with a treatment liquid, the image formed on the printed object is coated with silicone oil, and the friction coefficient of the surface of the printed object is reduced. As a result, even if the image formed on the printed object is rubbed, it is difficult to fade, and a printed object with excellent color fastness to dry friction and color fastness to wet friction can be produced. In addition, by being coated with silicone oil that has the effect of reducing friction, the friction between the yarns of the printed object is reduced. As a result, the hardening of the printed object caused by image formation is alleviated, and the deterioration of the touch of the printed object is suppressed.

[0024] The second advantage is explained. Silicone oil has water resistance. By post-treating the printed object with a treatment liquid, the printed object is coated with water-resistant silicone oil, and the surface of the printed object is given water resistance. As a result, even if the image formed on the printed object is rubbed in a wet state, it is difficult to fade, and a printed object with excellent wet rubbing color fastness can be produced.

[0025] The third advantage is explained. It can be inferred that since the ionic group-containing silicone oil has an ionic group, an ionic bond is formed between the ionic group and the printing object, and between the ionic group and the polymer, ink and / or adhesive of the pretreatment liquid sprayed onto the printing object. By forming an ionic bond, the ionic group-containing silicone oil is difficult to be washed away by water from the printing object, the polymer of the pretreatment liquid, the ink adhesive and / or the ink. As a result, a printed object with excellent wet rubbing color fastness can be produced.

[0026] The fourth advantage is described. Since the silicone oil containing an ionic group has an ionic group, the emulsified particles containing the silicone oil containing an ionic group are appropriately dispersed in the aqueous medium of the treatment liquid. Such a treatment liquid can be appropriately ejected from the treatment head of the inkjet printing device. When the treatment liquid is ejected from the treatment head, the amount of treatment liquid used is reduced compared to the case where the printed material is immersed in the treatment liquid. Therefore, it is difficult for the printed object to become hard, and the deterioration of the touch of the printed material is suppressed. In addition, when the treatment liquid is ejected from the treatment head, silicone oil with a high viscosity can be used compared to the case where ink containing silicone oil as a base oil is ejected from the recording head. Therefore, printed materials with excellent color fastness to friction can be produced.

[0027] The fifth advantage is explained. By including both the ionic group-containing silicone oil and the unmodified silicone oil in the treatment liquid, the color fastness to dry rubbing and the color fastness to wet rubbing of the printed material are excellent. Specifically, first, as described in the third advantage above, by including the ionic group-containing silicone oil, a printed material with excellent color fastness to wet rubbing can be produced. Moreover, by including the unmodified silicone oil having higher smoothness and film durability than the ionic group-containing silicone oil, a printed material with excellent color fastness to dry rubbing can be produced. The first to fifth advantages are explained above.

[0028] The content percentage of silicone oil in the treatment liquid is preferably 5% by mass or more and 15% by mass or less. By making the content percentage of silicone oil 5% or more, the deterioration of the touch of the printed material is further suppressed, and a printed material with better color fastness to friction can be produced. By making the content percentage of silicone oil 15% or less, the ejection of the treatment liquid from the processing head of the inkjet printing device can be improved. In addition, although it also depends on the content ratio of the unmodified silicone oil in the treatment liquid relative to the silicone oil containing ionic groups, by making the content percentage of silicone oil 15% or less, the excessive increase of the ionic group amount of the silicone oil containing ionic groups contained in the silicone oil is suppressed. As a result, it is possible to prevent the surface of the printed object from being difficult to be given appropriate waterproofness, and it is possible to suppress the reduction of the color fastness to friction of the printed material. In particular, if the content percentage of silicone oil is within this concentration range, although it also depends on the content ratio of the unmodified silicone oil in the treatment liquid relative to the silicone oil containing ionic groups, a printed material with excellent color fastness to friction can be produced.

[0029] The content percentage of the silicone oil in the treatment liquid is preferably 7% by mass or more, more preferably 9% by mass or more, and further preferably 10% by mass or more. In addition, the content percentage of the silicone oil in the treatment liquid is preferably 14% by mass or less, and more preferably 13% by mass or less. In particular, by setting the content percentage of the silicone oil in the treatment liquid to be within the range of 10% by mass or more and 13% by mass or less, a printed article having both better color fastness to dry rubbing and better color fastness to wet rubbing can be produced.

[0030] The content percentage of silicone oil in the treatment liquid refers to the percentage of the mass of silicone oil relative to the mass of the treatment liquid. In addition, in this specification, the content percentage of silicone oil refers to the percentage of the total mass of ionic group-containing silicone oil and unmodified silicone oil relative to the mass of the treatment liquid.

[0031] The viscosity of silicone oil is preferably 500 mm 2 / s (mm 2 / sec) or more. If the viscosity of silicone oil is 500mm 2 / s or more, the silicone oil is difficult to be separated from the printed material due to friction, and a printed material with better dry friction fastness and wet friction fastness can be produced. In addition, as mentioned above, the treatment liquid involved in the first embodiment can be ejected from the treatment head of the inkjet printing device. When the treatment liquid is ejected from the treatment head, the amount of treatment liquid used is reduced compared to the case where the printed material is immersed in the treatment liquid. Therefore, even if 500mm is used in the treatment liquid, 2 When the viscosity of the silicone oil is high, the printed object is less likely to become hard, and the deterioration of the touch of the printed object is further suppressed.

[0032] The upper limit of the viscosity of the silicone oil is not particularly limited. For example, the viscosity of the silicone oil is preferably 100,000 mm2 / s or less, more preferably 6000mm 2 / s or less. The viscosity of silicone oil can be, for example, from 500 mm 2 / s、700mm 2 / 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 / s is within the range of 2 values ​​selected from the group consisting of.

[0033] The viscosity of silicone oil refers to the kinematic viscosity at 25°C. In the present specification, the viscosity of silicone oil described above refers to the viscosity of silicone oil contained in one emulsified particle. Specifically, when one emulsified particle contains one silicone oil, the viscosity of the silicone oil mentioned above refers to the viscosity of the one silicone oil. For example, when the first emulsified particle contains one ionic group-containing silicone oil and the second emulsified particle contains one unmodified silicone oil, the viscosity of the silicone oil mentioned above refers to the viscosity of the one ionic group-containing silicone oil or the viscosity of the one unmodified silicone oil. Alternatively, when one emulsified particle contains two or more silicone oils, the viscosity of the silicone oil mentioned above refers to the viscosity of the mixture of the two or more silicone oils. For example, when one emulsified particle contains both one ionic group-containing silicone oil and one unmodified silicone oil, the viscosity of the silicone oil mentioned above refers to the viscosity of the mixture of the one ionic group-containing silicone oil and the one unmodified silicone oil. In addition, the conditions for the viscosity of the silicone oil described above refer to the conditions being satisfied by all types of emulsified particles contained in the treatment liquid.

[0034] The viscosity of the ionic group-containing silicone oil contained in the treatment liquid according to the first embodiment is preferably 500 mm 2 / s or more. By making the viscosity of the ionic group-containing silicone oil 500mm 2 When the viscosity of the silicone oil containing an ionic group is above 1000 mm / s, the silicone oil is unlikely to be separated from the printed material due to friction, and a printed material having excellent color fastness to wet friction can be produced. 2 In addition, the upper limit of the viscosity of the ionic group-containing silicone oil is not particularly limited, and the viscosity of the ionic group-containing silicone oil is more preferably 100,000 mm 2 / s or less, more preferably 6000mm 2 / s or less.

[0035] In addition, the viscosity of the unmodified silicone oil contained in the treatment liquid according to the first embodiment is preferably 300 mm 2 / s or more. By making the viscosity of the unmodified silicone oil 300mm 2 / s or more, the silicone oil is less likely to be detached from the printed material due to friction, and a printed material with particularly excellent dry friction color fastness can be produced. The viscosity of the unmodified silicone oil is more preferably 500 mm 2 / s or more, more preferably 1000mm 2 In addition, the upper limit of the viscosity of the unmodified silicone oil is not particularly limited, and the viscosity of the unmodified silicone oil is more preferably 100000 mm 2 / s or less, more preferably 6000mm 2 / s or less.

[0036] The viscosity of the silicone oil is measured according to the method described in JIS (Japanese Industrial Standards) Z8803: 2011 (Method for measuring viscosity of liquids). Alternatively, for example, the viscosity of the silicone oil can be measured by extracting the silicone oil from the treatment liquid with toluene, washing and drying the silicone oil to separate the silicone oil from the treatment liquid.

[0037] The average particle size of the emulsified particles (dispersed particle size in the aqueous medium) is preferably 100 nm or more and 250 nm or less. By setting the average particle size of the emulsified particles to 100 nm or more and 250 nm or less, the inkjet processing liquid according to the first embodiment further suppresses the deterioration of the touch of the printed material, can produce a printed material with better color fastness to friction, and has excellent ejection properties from the processing head of the inkjet printing device.

[0038] Specifically, by setting the average particle size of the emulsified particles to be above 100 nm, the color fastness to friction, especially the color fastness to wet friction, of the printed material can be prevented from decreasing. On the other hand, by setting the average particle size of the emulsified particles to be below 250 nm, the ejection property of the treatment liquid from the treatment head can be improved.

[0039] Furthermore, the average particle size of the emulsified particles is more preferably 100 nm or more and 160 nm or less. Alternatively, the average particle size of the emulsified particles may be, for example, within a range of two values ​​selected from the group consisting of 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.

[0040] In this specification, when the treatment liquid contains two or more emulsified particles with different average particle sizes (for example, two or more emulsified particles selected from the group consisting of first emulsified particles containing ionic group-containing silicone oil, second emulsified particles containing unmodified silicone oil, and third emulsified particles containing both ionic group-containing silicone oil and unmodified silicone oil), "the average particle size of the emulsified particles is within a specific range" means "the average particle size of each of the two or more emulsified particles is within a specific range". In addition, when the treatment liquid contains two or more emulsified particles with different average particle sizes, the smaller the difference in the average particle size of each emulsified particle, the better. For example, the average particle size of the first emulsified particles containing ionic group-containing silicone oil and the average particle size of the second emulsified particles containing unmodified silicone oil are both more preferably within the range of 100 nm to 160 nm.

[0041] The average particle size of the emulsified particles refers to the harmonic mean particle size calculated based on the scattered light intensity standard based on the cumulant method (also called the cumulant average particle size). The average particle size of the emulsified particles is measured according to the method described in ISO 13321:1996 (Particle size analysis-Photon correlation spectroscopy).

[0042] In addition, the emulsified particles may also contain components other than silicone oil. However, when the emulsified particles contain only silicone oil, it is possible to more reliably produce a printed material having excellent color fastness to rubbing, and it is possible to more reliably suppress the deterioration of the touch of the printed material.

[0043] As mentioned above, the silicone oil contained in the emulsified particles includes silicone oil containing ionic groups and unmodified silicone oil. In addition, it is also possible that the first emulsified particles contain silicone oil containing ionic groups, and the second emulsified particles, which are other types of emulsified particles, contain unmodified silicone oil. Alternatively, it is also possible that one type of emulsified particle contains both silicone oil containing ionic groups and unmodified silicone oil. The following describes silicone oil containing ionic groups and unmodified silicone oil.

[0044] (Silicone oil containing ionic groups)

[0045] Ionic group-containing silicone oil is a modified silicone oil, more specifically, an ionic group-modified silicone oil. Examples of the ionic group-modified silicone oil include silicone oils in which an ionic group is introduced into a side chain and silicone oils in which an ionic group is introduced into a terminal group.

[0046] The modified silicone oil having an ionic group introduced into a side chain has 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).

[0047]

[0048] The * in formula (1a) represents a dangling bond to the silicon atom in the repeating unit represented by formula (1b) or (1c). The * in formula (1d) represents a dangling bond to the oxygen atom in the repeating unit represented by formula (1b) or (1c). R in formula (1c) 1 The ionic group in the group containing an ionic group is preferably an amino group, a carboxyl group, a phenolic hydroxyl group or a silanol group.

[0049] The modified silicone oil having an ionic group introduced into 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).

[0050]

[0051] The * in formula (2a) represents a dangling bond bonded to the silicon atom in the repeating unit represented by formula (2b). The * in formula (2c) represents a dangling bond bonded to the oxygen atom in the repeating unit represented by formula (2b). 2 And R in formula (2c) 3 Each independently represents a group containing an ionic group. As the ionic group in the group containing an ionic group, an amino group, a carboxyl group, a phenolic hydroxyl group or a silanol group is preferred.

[0052] The ionic group-containing silicone oil preferably contains at least one selected from the group consisting of amino-modified silicone oil, carboxyl-modified silicone oil, phenol-modified silicone oil and silanol-modified silicone oil. In addition, the ionic group-containing silicone oil is more preferably at least one selected from the group consisting of these. In addition, the ionic group-containing silicone oil is more preferably one of these. Amino-modified silicone oil, carboxyl-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 an ionic group. Among these, the ionic group-containing silicone oil is more preferably a carboxyl-modified silicone oil.

[0053] In order to properly disperse the emulsified particles containing the ionic group-containing silicone oil in the 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 mol of the functional group (ionic group). The functional group equivalent of the ionic group-containing silicone oil can be, for example, within the range of two values ​​selected from the group consisting of 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.

[0054] When one emulsified particle contains ionic group-containing silicone oil, or when one emulsified particle contains both ionic group-containing silicone oil and unmodified silicone oil, the content percentage of the ionic group-containing silicone oil relative to the total mass of the silicone oil contained in the emulsified particles is preferably greater than 30 mass % and less than 100 mass %, more preferably greater than 40 mass % and less than 100 mass %, and particularly preferably 100 mass %.

[0055] (Unmodified silicone oil)

[0056] By making the treatment liquid contain not only the ionic group-containing silicone oil but also the unmodified silicone oil, the color fastness to dry rubbing can be improved. In addition, when one kind of emulsified particles contains both the ionic group-containing silicone oil and the unmodified silicone oil, the viscosity of the silicone oil can also be adjusted. Specifically, the unmodified silicone oil preferably contains dimethyl polysiloxane, more preferably dimethyl polysiloxane.

[0057] When one type of emulsified particles contains unmodified silicone oil, or when one type of emulsified particles contains both ionic group-containing silicone oil and unmodified silicone oil, the content percentage of the unmodified silicone oil relative to the total mass of the silicone oil contained in the emulsified particles is preferably 50 mass % or more and 100 mass % or less, more preferably 50 mass % or more and 70 mass % or less, and further preferably 50 mass % or more and 60 mass % or less.

[0058] The silicone oil contained in the emulsified particles is preferably a combination of carboxyl-modified silicone oil and dimethylpolysiloxane. In this case, the first emulsified particles may contain carboxyl-modified silicone oil, and the second emulsified particles may contain dimethylpolysiloxane. Alternatively, one type of emulsified particles may contain both carboxyl-modified silicone oil and dimethylpolysiloxane. Among these, from the viewpoint of being able to produce printed materials with better wet friction color fastness, it is preferred that the first emulsified particles contain carboxyl-modified silicone oil, and the second emulsified particles contain dimethylpolysiloxane.

[0059] The content ratio of the unmodified silicone oil in the treatment liquid to the ionic group-containing silicone oil is preferably 0.33 or more and 3 or less. By setting the content ratio of the unmodified silicone oil within this range, the deterioration of the touch of the printed material can be more reliably suppressed, and the printed material with excellent color fastness to dry friction and color fastness to wet friction can be more reliably produced. The content ratio of the unmodified silicone oil to the ionic group-containing silicone oil is more preferably 0.33 or more and 1 or less. By setting the content ratio of the unmodified silicone oil within this range, the printed material with better color fastness to wet friction can be produced.

[0060] <Aqueous medium>

[0061] The aqueous medium contained in the treatment liquid is a medium with water as the main component. The aqueous medium can act as a solvent or as a dispersion medium. As specific examples of the aqueous medium, water or a mixed solution of water and a polar solvent can be cited. As examples of polar solvents contained in the aqueous medium, methanol, ethanol, isopropanol, butanol and methyl ethyl ketone can be cited. The percentage content of water in the aqueous medium is preferably 90% by mass or more, and particularly preferably 100% by mass. Relative to the mass of the treatment liquid, the percentage 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.

[0062] <Other ingredients>

[0063] The treatment liquid may contain components other than the emulsified particles containing silicone oil (including ionic group-containing silicone oil and unmodified silicone oil) and the aqueous medium (hereinafter sometimes referred to as other components) as needed. Examples of other components include acids, bases, polyols, and dispersants.

[0064] (acid)

[0065] When the ionic group-containing silicone oil has anionic groups, the treatment liquid preferably contains an acid. The acid promotes the ionization of the anionic groups, and the emulsified particles containing the ionic group-containing silicone oil are appropriately dispersed in an aqueous medium. As the acid, for example, strong acids and weak acids can be listed. As strong acids, for example, hydrochloric acid, p-toluenesulfonic acid and sulfuric acid can be listed. As weak acids, for example, benzoic acid and acetic acid can be listed. In order to promote the ionization of the anionic groups possessed by the silicone oil, a strong acid is preferably used as the acid. Specifically, hydrochloric acid, p-toluenesulfonic acid or sulfuric acid is more preferred. When the treatment liquid contains an acid, the percentage of the acid content converted into an acid amount at a concentration of 1 mol / L relative to the mass of the treatment liquid is preferably greater than 1% by mass and less than 5% by mass.

[0066] (Alkali)

[0067] When the ionic group-containing silicone oil has a cationic group, the treatment liquid preferably contains a base. The base promotes the ionization of the cationic group, and the emulsified particles containing the ionic group-containing silicone oil are appropriately dispersed in an aqueous medium. As the base, for example, sodium hydroxide can be cited. When the treatment liquid contains a base, the content percentage of the base converted into a base amount at a concentration of 1 mol / L relative to the mass of the treatment liquid is preferably 1% by mass or more and 5% by mass or less.

[0068] (Polyol)

[0069] By making the treatment liquid contain a polyol, the viscosity of the treatment liquid is appropriately adjusted. The polyol is preferably a diol or a triol. As the diol, for example, a diol compound can be mentioned. More specifically, ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol and tetraethylene glycol can be mentioned. As the triol, for example, glycerol can be mentioned. When the treatment liquid contains a polyol, the content percentage of the polyol relative to the mass of the treatment liquid is preferably 10 mass % or more and 40 mass % or less, more preferably 15 mass % or more and 35 mass % or less.

[0070] (Dispersant)

[0071] As the dispersant, for example, surfactants, resin dispersants and polysaccharides can be cited. However, it is preferred that the treatment liquid does not contain a dispersant and the emulsified particles are dispersed in the treatment liquid. As mentioned above, the emulsified particles containing the silicone oil containing an ionic group are appropriately dispersed in an aqueous medium. Therefore, even in the absence of a dispersant, the dispersed state of the emulsified particles can be maintained. The dispersant often has a hydrophilic group. When the treatment liquid does not contain a dispersant having a hydrophilic group, the wet rubbing color fastness of the printed material treated with the treatment liquid is further improved.

[0072] <Method for producing treatment liquid>

[0073] An example of a method for producing a treatment liquid is described. First, a homogenizer is used to mix and emulsify ionic group-containing silicone oil, an aqueous medium, and components added as needed (for example, an acid or a base, and a polyol). Thus, first emulsified particles containing ionic group-containing silicone oil are dispersed in the aqueous medium to obtain a first treatment liquid. Secondly, a homogenizer is used to mix and emulsify unmodified silicone oil, an aqueous medium, and components added as needed (for example, an acid or a base, and a polyol). Thus, second emulsified particles containing unmodified silicone oil are dispersed in the aqueous medium to obtain a second treatment liquid. Finally, by mixing the first treatment liquid and the second treatment liquid, a treatment liquid containing first emulsified particles containing ionic group-containing silicone oil and second emulsified particles containing unmodified silicone oil can be produced.

[0074] In order to make the emulsification proceed well, a first raw material emulsion containing the first emulsified particles and a second raw material emulsion containing the second emulsified particles may be prepared in advance, and the first raw material emulsion and the second raw material emulsion, an aqueous medium, and a polyol added as needed are mixed to obtain a treatment liquid. The raw material emulsion contains, for example, an ionic group-containing silicone oil or an unmodified silicone oil, a portion of the aqueous medium, and an acid or alkali added as needed. When the raw material emulsion is manufactured, the emulsification time is, for example, more than 5 minutes and less than 1 hour. The emulsification temperature is, for example, more than 5°C and less than 40°C. The content percentage of the raw material emulsion relative to the mass of the treatment liquid is, for example, more than 15% by mass and less than 50% by mass.

[0075] Another example of a method for producing a treatment liquid is described. First, an ionic group-containing silicone oil, an unmodified silicone oil, an aqueous medium, and components added as needed (e.g., an acid or a base, and a polyol) are mixed and emulsified using a homogenizer. Thus, emulsified particles containing both the ionic group-containing silicone oil and the unmodified silicone oil are dispersed in the aqueous medium. Finally, a treatment liquid containing emulsified particles containing both the ionic group-containing silicone oil and the unmodified silicone oil can be produced.

[0076] In this example, in order to make the emulsification proceed well, a raw material emulsion containing emulsified particles containing both ionic group-containing silicone oil and unmodified silicone oil may be prepared in advance, and the raw material emulsion, aqueous medium, and polyol added as needed are mixed to obtain a treatment liquid. The raw material emulsion contains, for example, ionic group-containing silicone oil, unmodified silicone oil, a portion of the aqueous medium, and an acid or alkali added as needed. The emulsification time, emulsification temperature, and content percentage of the raw material emulsion when preparing the raw material emulsion are the same as those in the above-mentioned manufacturing example.

[0077] In addition, if the average particle size of the emulsified particles contained in the treatment liquid is to be adjusted, for example, a surfactant such as polyoxyethylene alkyl ether may be added in an appropriately adjusted amount and mixed when preparing the treatment liquid or the raw material emulsion. Specifically, by increasing the amount of surfactant added, the average particle size of the emulsified particles can be further reduced.

[0078] [Second embodiment: inkjet printing device]

[0079] Below, refer to Figure 1 The inkjet printing device 10 according to the second embodiment of the present invention will be described. Figure 1 The components are mainly schematically shown. The size, number, etc. of the components shown in the figures can be changed as appropriate. Figure 1 It is a side view showing the main part of the inkjet printing apparatus 10 as an example of the inkjet printing apparatus according to the second embodiment. Figure 1 The inkjet printing device 10 shown in FIG. 1 is a flat-bed inkjet printing device.

[0080] The inkjet printing device 10 according to the second embodiment uses the treatment liquid according to the first embodiment to treat the printing object P. Since the treatment liquid according to the first embodiment is used, the inkjet printing device 10 can produce a printed object having excellent color fastness to dry rubbing and color fastness to wet rubbing, and can suppress the deterioration of the touch of the printed object for the same reasons as described in the first embodiment.

[0081] Figure 1 The inkjet printing apparatus 10 shown in FIG. 1 includes a recording head 1, a processing head 2, and a mounting table 3. The recording head 1 includes a first recording head 1a, a second recording head 1b, a third recording head 1c, and a fourth recording head 1d.

[0082] The recording head 1 ejects ink toward an image forming area of ​​a printing object P. The first recording head 1a, the second recording head 1b, the third recording head 1c, and the fourth recording head 1d of the recording head 1 eject inks of different colors (e.g., yellow ink, magenta ink, cyan ink, and black ink), respectively. The recording head 1 is not particularly limited, and examples thereof include a piezoelectric head and a thermal inkjet head.

[0083] The processing head 2 discharges a processing liquid toward at least the image forming region of the printing object P. The processing liquid is the processing liquid according to the first embodiment. The processing head 2 is not particularly limited, and examples thereof include a piezoelectric head and a thermal inkjet head.

[0084] The printing object P is placed on the stage 3. A recording head 1 and a processing head 2 are arranged above the stage 3 so as to eject ink and a processing liquid onto the printing object P. The stage 3 is driven by a motor (not shown) to move in a direction from the recording head 1 toward the processing head 2 (for example, Figure 1 The printing object P on the mounting table 3 is transported by the horizontal movement of the mounting table 3.

[0085] The printing object P may be a woven fabric or a knitted fabric. Examples of the printing object P include cotton cloth, silk cloth, linen cloth, acetate cloth, rayon cloth, nylon cloth, polyurethane cloth, and polyester cloth.

[0086] When making a printed object, first, the stage 3 on which the printing object P is placed moves horizontally, and the printing object P is transported to a position facing the recording head 1. Ink is ejected from the recording head 1 to the image forming area of ​​the printing object P. In this way, an image is formed in the image forming area of ​​the printing object P using the ink. After the ink is ejected, the stage 3 on which the printing object P is placed moves further horizontally, and the printing object P is transported to a position facing the processing head 2. A processing liquid is ejected from the processing head 2 to at least the image forming area of ​​the printing object P. In this way, a processing film is formed on the image formed in the image forming area of ​​the printing object P using the processing liquid.

[0087] The processing head 2 may also spray the processing liquid only to the image forming area of ​​the printing object P. Alternatively, the processing head 2 may spray the processing liquid to an area wider than the image forming area of ​​the printing object P, or may spray the processing liquid to the entire surface of the printing object P. In order to reduce the amount of processing liquid used to suppress the deterioration of the touch of the printed object, it is preferred that the processing head 2 sprays the processing liquid only to the image forming area of ​​the printing object P. And, based on the same reason, it is more preferred that the processing head 2 sprays the processing liquid only to the area in the image forming area where the ink is sprayed by the recording head 1. Since the processing head 2 can accurately control the spraying position of the processing liquid, it is possible to spray the processing liquid only to the area after the ink has been sprayed. In order to accurately control the spraying position of the processing liquid, it is preferred that the distance between the processing head 2 and the printing object P is greater than 1 mm and less than 5 mm. In addition, in order to efficiently perform post-processing using the processing liquid, it is preferred that only the processing liquid is sprayed from the processing head 2.

[0088] After the treatment liquid is ejected from the treatment head 2 toward the printing object P, the mounting table 3 on which the printing object P is mounted further moves horizontally to transport the printing object P to a position facing the heating unit (not shown). The printing object P is heated by the heating unit, and the ink and the treatment liquid are dried. The heating temperature is, for example, not less than 120° C. and not more than 180° C. The heating time is, for example, not less than 1 minute and not more than 10 minutes. The volatile components contained in the ink and the treatment liquid evaporate by heating, thereby promoting the fixation of the ink and the treatment liquid on the printing object P. As a result, a printed object can be produced, that is, a printing object P after an image is formed using ink and treated with the treatment liquid.

[0089] The inkjet printing apparatus 10 according to the second embodiment has been described above. However, the inkjet printing apparatus of the present invention is not limited to the above-described inkjet printing apparatus 10, and may be modified as shown in the following modified examples, for example.

[0090] Regarding the first modified example, the inkjet printing apparatus 10 may include a sprayer for spraying the processing liquid instead of the processing head 2 for ejecting the processing liquid.

[0091] Regarding the second modification, the treatment using the treatment liquid may be performed by immersing the printing object P in a tank storing the treatment liquid. In the case of immersion, the discharge amount of the treatment liquid described later in the third embodiment corresponds to the application amount of the treatment liquid.

[0092] Regarding the third modification, in the above-described embodiment, the mounting table 3 is moved horizontally. However, the recording head 1 and the processing head 2 may be moved horizontally in a state where the mounting table 3 is fixed.

[0093] Regarding the fourth variation, the stage 3 may be horizontally moved along the conveying direction of the print object P, or the recording head 1 and the processing head 2 may be horizontally moved, and the recording head 1 and the processing head 2 may be horizontally moved in a direction parallel to the conveying direction of the print object P.

[0094] Regarding the fifth modification, the number of the recording heads 1 may be 1 to 3 or 5 or more.

[0095] The sixth modification may be a non-flatbed inkjet printing apparatus. As long as the recording head 1 and the processing head 2 are provided, the effect of using the processing liquid according to the first embodiment can be obtained regardless of the type of the inkjet printing apparatus.

[0096] [Third embodiment: inkjet printing method]

[0097] Next, continue to refer to Figure 1 The inkjet printing method according to the third embodiment of the present invention is described. The inkjet printing method according to the third embodiment forms an image on the image forming area of ​​the printing object P using the processing liquid according to the first embodiment. In addition, the inkjet printing method according to the third embodiment forms an image on the image forming area of ​​the printing object P using the inkjet printing device 10 according to the second embodiment. Since the inkjet printing method according to the third embodiment uses the processing liquid according to the first embodiment, it is possible to produce a printed article having excellent color fastness to dry rubbing and color fastness to wet rubbing for the same reasons as described in the first embodiment, and it is possible to suppress the deterioration of the touch of the printed article.

[0098] The inkjet printing method according to the third embodiment includes an inkjet step and a treatment step. In the inkjet step, ink is ejected from the recording head 1 to the image forming area of ​​the printing object P. In the treatment step, a treatment liquid is ejected from the treatment head 2 to at least the image forming area of ​​the printing object P. The treatment liquid is the treatment liquid according to the first embodiment. The treatment step is performed, for example, after the inkjet step. The inkjet printing method may also include a heating step as required.

[0099] In the ink jetting step, the ink jetting amount to the printing object P is, for example, 5 g / m 2 Above and 40g / m 2 the following.

[0100] In the treatment step, the amount of treatment liquid ejected to the printing object P is, for example, 10 g / m 2 Above and 120g / m 2 In order to improve the color fastness to dry rubbing, the treatment liquid spraying amount is preferably 15g / m 2 Above and 30g / m 2 In order to improve not only the color fastness to dry rubbing but also the color fastness to wet rubbing, the treatment liquid spraying amount is more preferably 17 g / m 2 Above and 25g / m 2 Below. Above, refer to Figure 1 The inkjet printing method according to the third embodiment has been described.

[0101] [Ink used in the second and third embodiments]

[0102] The following describes the ink used in the second embodiment and the third embodiment. The ink contains, for example, a pigment and an aqueous medium. If necessary, the ink may also contain at least one selected from the group consisting of a surfactant, a polyol, and binder resin particles.

[0103] (pigment)

[0104] The pigment is dispersed in an aqueous medium, for example. From the viewpoint of obtaining an ink having excellent image density, hue, and color stability, the D 50 The diameter is preferably 30 nm to 250 nm, and more preferably 70 nm to 160 nm.

[0105] Examples of pigments include yellow pigments, orange pigments, red pigments, blue pigments, violet pigments, 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 violet pigments include CI Pigment Violet (19, 23, and 33). Examples of black pigments include CI Pigment Black (7).

[0106] The content percentage of the pigment relative to the mass of the ink is preferably 1% by mass or more and 12% by mass or less, and more preferably 1% by mass or more and 7% by mass or less. By making the content percentage of the pigment 1% by mass or more, the image density of the printed material produced can be increased. In addition, by making the content percentage of the pigment 12% by mass or less, an ink with high fluidity can be obtained.

[0107] (Aqueous medium)

[0108] The aqueous medium contained in the ink has the same meaning as the aqueous medium contained in the treatment liquid described in the first embodiment. The content percentage of the aqueous medium relative to the mass of the ink is preferably 5 mass % to 70 mass %, more preferably 40 mass % to 60 mass %.

[0109] (Surfactant)

[0110] By making the ink contain a surfactant, the wettability of the ink to the printed object is improved. As surfactants, for example, anionic surfactants, cationic surfactants, nonionic surfactants and amphoteric surfactants can be listed. 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 acetylene glycol ethylene oxide adduct. The HLB value of the surfactant is preferably greater than 3 and less than 20, more preferably greater than 6 and less than 16, and further preferably greater than 7 and less than 10. The HLB value of the surfactant is calculated, for example, by the Griffin method and according to the formula "HLB value = 20×(sum of the formula weights of the hydrophilic part) / molecular weight". In order to suppress image offset while increasing image concentration, the content percentage of the surfactant relative to the mass of the ink is preferably greater than 0.1 mass % and less than 5.0 mass %, and more preferably greater than 0.5 mass % and less than 2.0 mass %.

[0111] (Polyol)

[0112] By making the ink contain a polyol, the viscosity of the ink is appropriately adjusted. The polyol contained in the ink has the same meaning as the polyol contained in the treatment liquid described in the first embodiment. In the case where the ink contains a polyol, in order to appropriately adjust the viscosity of the ink, the content percentage of the polyol relative to the mass of the ink is preferably 5 mass % or more and 60 mass % or less, and more preferably 20 mass % or more and 50 mass % or less.

[0113] (Binder resin particles)

[0114] The binder resin particles exist in a state of being dispersed in an aqueous medium. The binder resin particles function as a binder for bonding the printing object and the pigment. Therefore, by making the ink contain the binder resin particles, a printed object with excellent pigment fixability can be obtained.

[0115] As the resin contained in the binder resin particles, polyurethane resin, (meth) acrylate resin, styrene-(meth) acrylate resin, styrene-maleic acid copolymer, vinyl naphthalene-(meth) acrylic acid copolymer and vinyl naphthalene-maleic acid copolymer can be listed. As the resin contained in the binder resin particles, polyurethane resin is preferred. The content percentage of the polyurethane resin in the binder resin particles is preferably 80% by mass or more, more preferably 100% by mass.

[0116] The content percentage of the binder resin relative to the mass of the ink is preferably 1% by mass or more and 20% by mass or less, and more preferably 2% by mass or more and 10% by mass or less. If the content percentage of the binder resin particles is 1% by mass or more, a printing object with excellent pigment fixability can be obtained. On the other hand, if the content percentage of the binder resin particles is 20% by mass or less, the ink can be stably ejected onto the printing object.

[0117] (additive)

[0118] The ink may further contain known additives (more specifically, a dissolution stabilizer, an anti-drying agent, an antioxidant, a viscosity adjuster, a pH adjuster, an antifungal agent, etc.) as necessary.

[0119] (Ink manufacturing method)

[0120] The ink is produced by mixing the pigment, the aqueous medium, and components added as needed (eg, a surfactant, a polyol, and binder resin particles) using a mixer, for example, and the mixing time is, for example, 1 minute to 30 minutes.

[0121] [Summary of the Invention]

[0122] The first aspect of the present invention relates to an inkjet treatment liquid comprising: emulsified particles containing silicone oil; and an aqueous medium, wherein the silicone oil contains ionic group-containing silicone oil and unmodified silicone oil.

[0123] The inkjet treatment liquid can suppress the deterioration of the touch of printed materials and can produce printed materials with excellent color fastness to dry rubbing and color fastness to wet rubbing.

[0124] In the inkjet treatment liquid, the emulsified particles may include: first emulsified particles containing the ionic group-containing silicone oil, and second emulsified particles containing the unmodified silicone oil.

[0125] By having this structure, it is possible to produce printed materials with particularly excellent color fastness to wet rubbing.

[0126] Alternatively, in the inkjet treatment liquid, the emulsified particles may include: emulsified particles containing both the ionic group-containing silicone oil and the unmodified silicone oil.

[0127] By having this structure, it is possible to more reliably suppress the deterioration of the touch of the printed material, and it is possible to more reliably produce a printed material with excellent color fastness to dry friction and color fastness to wet friction.

[0128] In the inkjet treatment liquid, a content ratio of the unmodified silicone oil to the ionic group-containing silicone oil in the inkjet treatment liquid may be 0.33 or more and 1 or less.

[0129] By having this structure, it is possible to more reliably suppress the deterioration of the touch of the printed material, and it is possible to more reliably produce a printed material with excellent color fastness to dry friction and color fastness to wet friction.

[0130] In the inkjet treatment liquid, the viscosity of the ionic group-containing silicone oil can be 500 mm 2 / s or more.

[0131] By having this structure, silicone oil is difficult to be separated from the printed material due to friction, and a printed material with excellent both dry friction color fastness and wet friction color fastness, especially excellent wet friction color fastness, can be produced.

[0132] In the inkjet treatment liquid, the ionic group-containing silicone oil may contain at least one selected from the group consisting of carboxyl-modified silicone oil, amino-modified silicone oil, phenol-modified silicone oil, and silanol-modified silicone oil.

[0133] By making the ionic group-containing silicone oil contain at least one selected from the group consisting of these, it is possible to more reliably suppress the deterioration of the touch of the printed material, and more reliably produce printed materials with excellent dry friction color fastness and wet friction color fastness, especially excellent wet friction color fastness.

[0134] In the inkjet treatment liquid, the viscosity of the unmodified silicone oil can be 300 mm 2 / s or more.

[0135] By having this structure, silicone oil is difficult to be separated from the printed material due to friction, and a printed material with excellent both dry friction color fastness and wet friction color fastness, especially excellent dry friction color fastness, can be produced.

[0136] In the inkjet treatment liquid, the unmodified silicone oil may contain dimethylpolysiloxane.

[0137] By making the unmodified silicone oil contain dimethylpolysiloxane, it is possible to more reliably suppress the deterioration of the touch of the printed material, and more reliably produce a printed material having excellent both dry rubbing color fastness and wet rubbing color fastness, especially excellent dry rubbing color fastness.

[0138] The inkjet processing liquid can be used for textile printing.

[0139] By using the inkjet treatment liquid for printing, the effect of suppressing the deterioration of the touch of the printed object and the effect of excellent color fastness to rubbing can be more effectively exerted.

[0140] The inkjet printing device involved in the second aspect of the present invention includes: a recording head that sprays ink toward an image forming area of ​​a printing object; and a processing head that sprays a processing liquid toward at least the image forming area of ​​the printing object, wherein the processing liquid is the inkjet processing liquid involved in the first aspect of the present invention.

[0141] Since the inkjet printing apparatus uses the inkjet treatment liquid according to the first aspect of the present invention, it is possible to produce printed materials with suppressed deterioration of touch and to produce printed materials with excellent color fastness to dry rubbing and color fastness to wet rubbing.

[0142] The inkjet printing method involved in the third aspect of the present invention includes: an inkjet step of spraying ink from a recording head toward an image forming area of ​​a printing object; and a processing step of spraying a processing liquid from a processing head toward at least the image forming area of ​​the printing object, wherein the processing liquid is the inkjet processing liquid involved in the first aspect of the present invention.

[0143] Since the inkjet printing method uses the inkjet treatment liquid according to the first aspect of the present invention, it is possible to produce printed materials with suppressed deterioration of touch and to produce printed materials with excellent color fastness to dry rubbing and color fastness to wet rubbing.

[0144] Example

[0145] Hereinafter, the present invention will be further described in detail by way of examples, but the present invention is not limited to these examples.

[0146] In this example, various printed articles were prepared by changing the types and content ratios of the ionic group-containing silicone oil and the unmodified silicone oil in the inkjet treatment liquid, and the color fastness to rubbing and the degree of suppression of tactile deterioration of the printed articles were evaluated.

[0147] [Method for preparing treatment solution]

[0148] The treatment liquid (A-1) and the treatment liquid (A-2) used in this evaluation test were prepared by the method described below. The content percentage of the silicone oil was rounded off to the first decimal place.

[0149] <Preparation of Treatment Solution (A-1)>

[0150] First, a raw material emulsion A contained in the treatment liquid (A-1) was prepared. Specifically, an unmodified silicone oil (specifically, dimethyl polysiloxane) (“KF96-3000cs” manufactured by Shin-Etsu Chemical Co., Ltd., viscosity: 3000 mm 2 / s, specific gravity: 0.97) 180 g and phenol-modified silicone oil ("KF2201" manufactured by Shin-Etsu Chemical Co., Ltd., viscosity: 97 m 2 / s, specific gravity: 0.99, functional group equivalent: 1474g / mol) 120g was mixed to obtain a viscosity of 1000mm 2 / s of mixture MD. 300g of mixture MD, 600g of ion exchange water, and 100g of sodium hydroxide aqueous solution (concentration 1 mol / L) were placed in a beaker. The contents of the beaker were stirred at a speed of 10000rpm for 15 minutes using a homogenizer ("ULTRA-TURRAX T25" manufactured by IKA) and allowed to stand for 30 minutes. Next, the contents of the beaker were filtered with a 120-mesh stainless steel filter to obtain a raw emulsion A. Emulsified particles containing both unmodified silicone oil and phenol-modified silicone oil are dispersed in the raw emulsion A. The average particle size of the emulsified particles contained in the raw emulsion A is 160nm.

[0151] Next, a treatment liquid (A-1) was prepared using the raw material emulsion A prepared as described above. Specifically, 33.30 g of the raw material emulsion A (content percentage of a mixture of phenol-modified silicone oil and unmodified silicone oil: 30% by mass), 33.35 g of ion exchange water, and 33.35 g of propylene glycol were mixed to obtain a treatment liquid (A-1). In the treatment liquid (A-1), the content percentage (total) of the phenol-modified silicone oil and the unmodified silicone oil was 10% by mass.

[0152] <Preparation of Treatment Solution (A-2)>

[0153] First, a raw material emulsion B contained in the treatment liquid (A-2) was prepared. Specifically, an unmodified silicone oil (specifically, dimethyl polysiloxane) (“KF96-3000cs” manufactured by Shin-Etsu Chemical Co., Ltd., viscosity: 3000 mm 2 / s, specific gravity: 0.97) 180 g and silanol-modified silicone oil ("KF9701" manufactured by Shin-Etsu Chemical Co., Ltd., viscosity: 60 mm 2 / s, specific gravity: 0.977, functional group equivalent: 1500g / mol) 120g was mixed to obtain a viscosity of 1200mm 2 / s of mixture ME. 300g of mixture ME, 600g of ion exchange water, and 100g of sodium hydroxide aqueous solution (concentration 1mol / L) were placed in a beaker. The contents of the beaker were stirred at a speed of 10000rpm for 15 minutes using a homogenizer ("ULTRA-TURRAX T25" manufactured by IKA) and allowed to stand for 30 minutes. Next, the contents of the beaker were filtered with a 120-mesh stainless steel filter to obtain a raw emulsion B. Emulsified particles containing both unmodified silicone oil and silanol-modified silicone oil are dispersed in the raw emulsion B. The average particle size of the emulsified particles contained in the raw emulsion B is 220nm.

[0154] Next, a treatment liquid (A-2) was prepared using the raw material emulsion B prepared as described above. Specifically, the treatment liquid (A-2) was obtained in the same manner as the treatment liquid (A-1) except that the raw material emulsion A (content percentage of a mixture of phenol-modified silicone oil and unmodified silicone oil: 30% by mass) was changed to the raw material emulsion B (content percentage of a mixture of silanol-modified silicone oil and unmodified silicone oil: 30% by mass). In the treatment liquid (A-2), the content percentage (total) of the silanol-modified silicone oil and the unmodified silicone oil was 10% by mass.

[0155] The types of raw material emulsions in the treatment liquids (A-1) and (A-2), the preparation methods of the treatment liquids, the types of silicone oils and their content percentages, and the viscosities of the silicone oils are summarized in Table 1 below.

[0156]

[0157] In Table 1 and Table 3 described below, the meanings of the terms are as follows. "Amount" indicates the content percentage of the silicone oil in the treatment liquid. "wt%" indicates mass%. "Viscosity" indicates the viscosity of the silicone oil. When the emulsified particles contain two or more silicone oils, "viscosity" indicates the viscosity of the mixture of the two or more silicone oils (since the "treatment liquid preparation method" described below is "i").

[0158] Furthermore, in the above-mentioned Table 1 and the later-described Table 3, "i" in "method for preparing treatment liquid" indicates a preparation method of mixing ionic group-containing silicone oil and unmodified silicone oil from the preparation stage of raw material emulsion. Therefore, in this preparation method, the treatment liquid finally obtained is a treatment liquid containing emulsified particles containing both ionic group-containing silicone oil and unmodified silicone oil. On the other hand, "ii" in "method for preparing treatment liquid" shown only in the later-described Table 3 indicates a preparation method of preparing raw material emulsions of ionic group-containing silicone oil and unmodified silicone oil in advance, and then mixing the two emulsions. Therefore, in this preparation method, the treatment liquid finally obtained is a treatment liquid containing first emulsified particles containing ionic group-containing silicone oil and second emulsified particles containing unmodified silicone oil.

[0159] As shown in Table 1, both the treatment liquid (A-1) and the treatment liquid (A-2) contain emulsified particles containing silicone oil containing ionic group-containing silicone oil and unmodified silicone oil, and an aqueous medium.

[0160] [Measurement methods of various physical properties]

[0161] The average particle size of the emulsified particles in the raw material emulsion and the viscosity of the silicone oil are measured by the method described below.

[0162] <Measurement of Average Particle Diameter of Emulsified Particles>

[0163] The average particle size of the emulsified particles was measured using a laser diffraction particle size distribution measuring device ("ZETASIZER NANO ZS" manufactured by Malvern Instruments Ltd.) in accordance with the method described in ISO 13321:1996 (Particle size analysis-Photon correlation spectroscopy). The average particle size of the emulsified particles was measured using a measurement sample obtained by diluting the treatment liquid or the raw material emulsion (in the case of mixing two different raw material emulsions) 1000 times with water. In addition, the average particle size of the emulsified particles contained in the raw material emulsion and the average particle size of the emulsified particles contained in the treatment liquid were approximately the same as each other.

[0164] <Measurement of Viscosity of Silicone Oil>

[0165] The viscosity of the silicone oil was measured in accordance with the method described in JIS Z8803:2011 (Method for measuring viscosity of liquids) at a temperature of 25° C. The viscosity of the silicone oil was measured using an Ubbelohde viscometer described in “6.2.3 Ubbelohde viscometer” of JIS Z8803:2011.

[0166] [Evaluation method]

[0167] Using each of the prepared treatment solutions, the color fastness to rubbing and the degree of inhibition of tactile deterioration of various printed articles were evaluated. Specifically, evaluation ink was prepared, and evaluation printed articles were prepared using the evaluation ink and each of the treatment solutions, and the color fastness to rubbing and the degree of inhibition of tactile deterioration of the evaluation printed articles were evaluated. The following describes the details of the method for preparing the evaluation ink, the method for preparing the evaluation printed article, and various evaluation methods.

[0168] <Method for preparing evaluation ink>

[0169] Ink a used for evaluation of the treatment liquid was prepared by the method shown below.

[0170] (How to make ink a)

[0171] 125 g of ion exchange water and 2 g of nonionic surfactant ("SURFYNOL (registered trademark) 440 manufactured by Nissin Chemical Industry Co., Ltd., content: acetylene glycol ethylene oxide adduct) were placed in a 1L 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 Pigment Co., Ltd., content: CI Pigment 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., content: polyurethane dispersion, solid content concentration: 38% by mass) were added to the flask in sequence. The contents of the flask were stirred for 10 minutes to obtain ink a.

[0172] <Method for preparing printed material for evaluation>

[0173] Printed articles for evaluation were produced using the inks and treatment liquids shown in Table 2. For example, in the evaluation of Example 1-1 in Table 2, treatment liquid (A-1) and ink a were used.

[0174] As the printing object, a broad-width cotton cloth (manufactured by Seisen Co., Ltd., size: A4 size, warp and weft cotton yarn number: 40 / 1, warp yarn density: 130 strands / inch, weft yarn density: 75 strands / inch, unit area weight: 122 g / m 2). An inkjet printer ("Colorio (registered trademark) PX-045A" manufactured by Seiko Epson Corporation) was used to prepare the print for evaluation. The first ink chamber of the first ink cartridge was filled with ink. The second ink chamber of the second ink cartridge was filled with a treatment liquid. The first ink cartridge and the second ink cartridge were installed in the inkjet printer. In addition, the ink filled in the first ink chamber was ejected from the recording head of the inkjet printer. The treatment liquid filled in the second ink chamber was ejected from the treatment head of the inkjet printer.

[0175] Use an inkjet printer to eject ink from the recording head onto the printed object, with the ink ejection amount reaching 20 g / m 2 Next, using an inkjet printer, a treatment liquid is ejected from a treatment head toward the printing object, and the amount of treatment liquid ejected is set to 20 g / m 2 In this way, a treatment film having the same size as the solid image was formed on the solid image of the ink using the treatment liquid. Next, the printed object was heated at 160° C. for 3 minutes to dry the ink and the treatment liquid, thereby obtaining a printed object for evaluation.

[0176] <Evaluation of color fastness to rubbing>

[0177] The solid image formed on the evaluation printed material was rubbed with a rubbing white cotton cloth according to the dry test and wet test of the friction tester II type (Gakushin type) method described in JIS L-0849:2013 (Test method for color fastness to rubbing). The coloring degree of the rubbing white cotton cloth after rubbing was evaluated according to the "Criteria for determination of color change and fading" described in Article 10 (Determination of color fastness) of JIS L-0801:2011 (General rules for color fastness test methods). The coloring degree of the rubbing white cotton cloth was evaluated in 9 levels (level 1, level 1 to 2, level 2, level 2 to 3, level 3, level 3 to 4, level 4, level 4 to 5, and level 5 in descending order of the degree of contamination). The smaller the coloring degree of the rubbing white cotton cloth (closer to level 5), the better the color fastness to rubbing. The color fastness to dry rubbing and the color fastness to wet rubbing were evaluated according to the following criteria and the coloring degree of the rubbing white cotton cloth after the rubbing test. In addition, the determination result of the dry test is taken as the color fastness to dry rubbing, and the determination result of the wet test is taken as the color fastness to wet rubbing. The cases evaluated as A and B are considered to be qualified, and the cases evaluated as C are considered to be unqualified. The determined color fastness to rubbing and the evaluation results are summarized in Table 2 described below.

[0178] (Evaluation criteria for color fastness to dry rubbing)

[0179] Evaluation A: The color fastness to dry rubbing is grade 4 or higher.

[0180] Evaluation B: Color fastness to dry rubbing is level 3 to 4.

[0181] Evaluation C: Color fastness to dry rubbing is grade 3 or less.

[0182] (Evaluation criteria for color fastness to wet rubbing)

[0183] Evaluation A: Color fastness to wet rubbing is grade 3 or higher.

[0184] Evaluation B: Color fastness to wet rubbing is level 2 to 3.

[0185] Evaluation C: Color fastness to wet rubbing is grade 2 or less.

[0186] <Evaluation of the degree of suppression of deterioration in touch>

[0187] The unused printed object was folded in half along the warp (length direction), and the distance (loop height) between the lower fabric and the upper fabric of the fold was measured. The measured loop height of the unused printed object was set as the loop height before printing. Next, the area where the solid image of the evaluation print was formed was folded in half along the warp (length direction), and the loop height was measured. The measured loop height of the evaluation print was set as the loop height after printing. The loop height change rate before and after printing (unit: %) was calculated according to the formula "loop height change rate = 100 × loop height after printing / loop height before printing". The lower the loop height change rate, the less hard and swollen the printed object is after printing, which indicates that the deterioration of the touch of the printed object has been suppressed. Based on the loop height change rate, whether the deterioration of the touch of the printed object has been suppressed is evaluated according to the following criteria. The cases evaluated as A and B are considered qualified, and the cases evaluated as C are considered unqualified. The measured loop height change rate and the evaluation results of the degree of suppression of tactile deterioration are summarized in Table 2 described below.

[0188] (Evaluation criteria for the degree of suppression of deterioration in tactile feel)

[0189] Evaluation A: The change rate of the ring height is 125% or less.

[0190] Evaluation B: The change rate of the ring height is more than 125% and less than 130%.

[0191] Evaluation C: The change rate of the ring height exceeds 130%.

[0192]

[0193] In the above Table 2 and the later described Table 3, the meanings of the terms are as follows. "Touch" indicates the evaluation of the degree of suppression of the deterioration of the touch of the printed material. "Height" indicates the rate of change of the ring height before and after printing. "1-2", "2-3", "3-4" and "4-5" in the rubbing color fastness column respectively indicate that the coloring degree of the rubbing white cotton cloth is 1 to 2, 2 to 3, 3 to 4, and 4 to 5.

[0194] [Investigation]

[0195] As shown in Table 2, the color fastness to dry rubbing, the color fastness to wet rubbing, and the degree of suppression of tactile deterioration of the printed articles produced using the treatment liquid (A-1) and the treatment liquid (A-2) were all evaluated as A or B. Regarding the color fastness to rubbing, the color fastness to dry rubbing was particularly excellent. Therefore, it was determined that the inkjet treatment liquid of the present embodiment, which includes the treatment liquid (A-1) and the treatment liquid (A-2), can produce a printed article having excellent color fastness to dry rubbing and color fastness to wet rubbing, and can suppress the deterioration of the tactile deterioration of the printed article.

[0196] 3. Evaluation test of the combination of ionic group-containing silicone oil and unmodified silicone oil, their content ratio, and the color fastness to rubbing when the preparation method of the treatment liquid is changed

[0197] In this test, various printed articles were produced by changing the combination of ionic group-containing silicone oil and unmodified silicone oil contained in the treatment solution, their content ratio, and the preparation method of the treatment solution. Then, the color fastness to rubbing of the various printed articles produced was evaluated.

[0198] [Method for preparing treatment solution]

[0199] In this experiment, treatment solutions were used that varied the combination of carboxyl-modified silicone oil, amino-modified silicone oil, and unmodified silicone oil (dimethylpolysiloxane), their content ratios, and the method for preparing the treatment solution. The following describes the detailed methods for preparing treatment solutions (B-1) to (B-5), and treatment solutions (C-1) and (C-2) used in this experiment.

[0200] <Preparation of Treatment Solution (B-1)>

[0201] First, two kinds of raw material emulsions contained in the treatment liquid (B-1) were prepared. Specifically, first, 300 g of carboxyl-modified silicone oil ("X-22-3701E" manufactured by Shin-Etsu Chemical Co., Ltd., viscosity: 2000 mm 2 / s, specific gravity: 0.98, functional group equivalent: 4000g / mol), 570g ion exchange water, 50g sodium hydroxide aqueous solution (concentration: 1mol / L) and 80g surfactant (polyoxyethylene alkyl ether) were placed in a beaker. The contents of the beaker were stirred at a speed of 10000rpm for 15 minutes using a homogenizer ("ULTRA-TURRAX T25" manufactured by IKA) and left to stand for 30 minutes. Next, the contents of the beaker were filtered with a 120-mesh stainless steel filter to obtain a first raw material emulsion. The first emulsified particles containing carboxyl-modified silicone oil are dispersed in the first raw material emulsion. The average particle size of the first emulsified particles containing carboxyl-modified silicone oil is 102nm.

[0202] Next, 300 g of unmodified silicone oil (specifically, dimethyl polysiloxane) (“KF96-3000cs” manufactured by Shin-Etsu Chemical Co., Ltd., viscosity: 3000 mm 2 / s, specific gravity: 0.97), 610g of ion exchange water, and 90g of surfactant (polyoxyethylene alkyl ether) were placed in a beaker. The contents of the beaker were stirred at a speed of 10000rpm for 15 minutes using a homogenizer ("ULTRA-TURRAX T25" manufactured by IKA) and left to stand for 30 minutes. Next, the contents of the beaker were filtered with a 120-mesh stainless steel filter to obtain a second raw material emulsion. The second emulsified particles containing unmodified silicone oil are dispersed in the second raw material emulsion. The average particle size of the second emulsified particles containing unmodified silicone oil is 115nm.

[0203] Next, a treatment liquid (B-1) was prepared using the first raw material emulsion and the second raw material emulsion prepared as described above. Specifically, 25 g of the first raw material emulsion (content percentage of carboxyl-modified silicone oil: 30% by mass), 8.33 g of the second raw material emulsion (content percentage of unmodified silicone oil: 30% by mass), 33.32 g of ion exchange water, and 33.35 g of propylene glycol were mixed to obtain a treatment liquid (B-1). In the treatment liquid (B-1), the content percentage of carboxyl-modified silicone oil was 7.5% by mass, and the content percentage of unmodified silicone oil was 2.5% by mass.

[0204] <Preparation of Treatment Solution (B-2)>

[0205] In the preparation of the treatment liquid (B-2), when the first raw material emulsion and the second raw material emulsion were finally mixed, the amount of the first raw material emulsion (content percentage of carboxyl-modified silicone oil: 30% by mass) was changed to 16.67 g, and the amount of the second raw material emulsion (content percentage of unmodified silicone oil: 30% by mass) was changed to 16.67 g. The treatment liquid (B-2) was obtained in the same manner as the treatment liquid (B-1). The content percentage of the carboxyl-modified silicone oil in the treatment liquid (B-2) was 5% by mass, and the content percentage of the unmodified silicone oil was 5% by mass.

[0206] <Preparation of Treatment Solution (B-3)>

[0207] In the preparation of the treatment liquid (B-3), when the first raw material emulsion and the second raw material emulsion were finally mixed, the first raw material emulsion (content percentage of carboxyl-modified silicone oil: 30 mass %) was changed to 8.33 g, and the second raw material emulsion (content percentage of unmodified silicone oil: 30 mass %) was changed to 25 g. The treatment liquid (B-3) was obtained in the same manner as the treatment liquid (B-1). The content percentage of the carboxyl-modified silicone oil in the treatment liquid (B-3) was 2.5 mass %, and the content percentage of the unmodified silicone oil was 7.5 mass %.

[0208] <Preparation of Treatment Solution (B-4)>

[0209] First, a raw material emulsion contained in the treatment liquid (B-4) was prepared. Specifically, 150 g of unmodified silicone oil (specifically, dimethyl polysiloxane) ("KF96-3000cs" manufactured by Shin-Etsu Chemical Co., Ltd., viscosity: 3000 mm 2 / s, specific gravity: 0.97), 150 g of carboxyl-modified silicone oil ("X-22-3701E" manufactured by Shin-Etsu Chemical Co., Ltd., viscosity: 2000 mm 2 / s, specific gravity: 0.98, functional group equivalent: 4000g / mol), 610g ion exchange water, 10g sodium hydroxide aqueous solution (concentration: 1mol / L) and 90g surfactant (polyoxyethylene alkyl ether) were placed in a beaker. The contents of the beaker were stirred at a speed of 10000rpm for 15 minutes using a homogenizer ("ULTRA-TURRAX T25" manufactured by IKA) and left to stand for 30 minutes. Next, the contents of the beaker were filtered with a 120-mesh stainless steel filter to obtain a raw emulsion. Emulsified particles containing both carboxyl-modified silicone oil and unmodified silicone oil are dispersed in the raw emulsion. The average particle size of the emulsified particles containing both carboxyl-modified silicone oil and unmodified silicone oil is 110nm.

[0210] Next, a treatment liquid (B-4) was prepared using the raw material emulsion prepared as described above. Specifically, 33.33 g of the raw material emulsion (content percentage of a mixture of carboxyl-modified silicone oil and unmodified silicone oil: 30% by mass), 33.32 g of ion exchange water, and 33.35 g of propylene glycol were mixed to obtain a treatment liquid (B-4). In the treatment liquid (B-4), the content percentage of the carboxyl-modified silicone oil was 5% by mass, and the content percentage of the unmodified silicone oil was 5% by mass.

[0211] <Preparation of Treatment Solution (B-5)>

[0212] In the preparation of the treatment liquid (B-5), when preparing the first raw material emulsion, amino-modified silicone oil was used instead of carboxyl-modified silicone oil. Specifically, first, 300 g of amino-modified silicone oil ("KF-864" manufactured by Shin-Etsu Chemical Co., Ltd., viscosity: 1700 mm 2 / s, specific gravity: 0.98, functional group equivalent: 3800g / mol), 600g ion exchange water, and 100g hydrochloric acid (concentration: 1mol / L) were placed in a beaker. Then, the contents of the beaker were stirred at a speed of 10000rpm for 15 minutes using a homogenizer ("ULTRA-TURRAX T25" manufactured by IKA) and left to stand for 30 minutes. Next, the contents of the beaker were filtered with a 120-mesh stainless steel filter to obtain a first raw material emulsion. Emulsified particles of amino-modified silicone oil are dispersed in the first raw material emulsion. The average particle size of the emulsified particles contained in the first raw material emulsion is 150nm. In addition to using the raw material emulsion containing amino-modified silicone oil prepared in this way as the first raw material emulsion, a treatment liquid (B-5) was obtained in the same manner as the treatment liquid (B-2). In the treatment liquid (B-5), the content percentage of amino-modified silicone oil is 5% by mass, and the content percentage of unmodified silicone oil is 5% by mass.

[0213] <Preparation of Treatment Solution (C-1)>

[0214] In the preparation of the treatment liquid (C-1), only the first raw material emulsion prepared in the treatment liquid (B-1) was used to prepare the treatment liquid. Specifically, 33.33 g of the first raw material emulsion (content percentage of carboxyl-modified silicone oil: 30% by mass), 33.32 g of ion exchange water, and 33.35 g of propylene glycol were mixed to obtain the treatment liquid (C-1). In the treatment liquid (C-1), the content percentage of the carboxyl-modified silicone oil was 10% by mass.

[0215] <Preparation of Treatment Solution (C-2)>

[0216] In the preparation of the treatment liquid (C-2), only the second raw material emulsion prepared in the treatment liquid (B-1) was used to prepare the treatment liquid. Specifically, 33.33 g of the second raw material emulsion (content percentage of unmodified silicone oil: 30% by mass), 33.32 g of ion exchange water, and 33.35 g of propylene glycol were mixed to obtain the treatment liquid (C-2). In the treatment liquid (C-2), the content percentage of the unmodified silicone oil was 10% by mass.

[0217] Next, printed materials for evaluation were prepared using the prepared treatment liquids (B-1) to (B-5), treatment liquids (C-1), and treatment liquids (C-2), and the color fastness to rubbing thereof was evaluated.

[0218] <Method for preparing printed articles for evaluation of Examples 2-1 to 2-5 and Comparative Examples 2-1 to 2-2>

[0219] Regarding the preparation of printed articles of Examples 2-1 to 2-5 and Comparative Examples 2-1 to 2-2, evaluation printed articles were prepared by the same method as the method for preparing evaluation printed articles described in 1. above, except for the following changes. Specifically, the first ink chamber of the first ink cartridge was filled with the above-mentioned ink a, and the second ink chamber of the second ink cartridge was filled with any one of the treatment liquids (B-1) to (B-5) and (C-1) to (C-2) shown in Table 3 below. The method for preparing the ink used was the same as the method described in 1. above. In each of the Examples and Comparative Examples, the ejection amount of the treatment liquid was set to the amount shown in Table 3 below. In addition, the ejection amount of the ink was 20 g / m 2 .

[0220] <Evaluation of color fastness to rubbing>

[0221] The printed articles of Examples 2-1 to 2-5 and Comparative Examples 2-1 and 2-2 were evaluated by the same method as the evaluation of color fastness to rubbing described in 1. The evaluation results of the printed articles of each Example and each Comparative Example are summarized in Table 3 described below.

[0222] The types and contents of the ionic group-containing silicone oil and unmodified silicone oil used in each of the Examples and Comparative Examples, the preparation method of the treatment liquid, and the evaluation results of the color fastness to rubbing are summarized in Table 3 below.

[0223]

[0224] [Investigation]

[0225] As shown in Table 3 above, regardless of the preparation method of the treatment liquid, the color fastness to dry friction and the color fastness to wet friction of Examples 2-1 to 2-5 using the treatment liquid (B-1) to the treatment liquid (B-5) containing both ionic group-containing silicone oil and unmodified silicone oil as silicone oil are excellent. It can be speculated that this is because: by containing ionic group-containing silicone oil, ionic bonds are formed by ionic groups, and the oil is difficult to be washed away by water. At the same time, by containing unmodified silicone oil, the smoothness and film durability are further improved. On the other hand, the printed material of Comparative Example 2-1 using the treatment liquid (C-1) containing only ionic group-containing silicone oil has poor color fastness to dry friction. In addition, the printed material of Comparative Example 2-2 using the treatment liquid (C-2) containing only unmodified silicone oil has significantly poor color fastness to wet friction.

[0226] In addition, regarding the method for preparing the treatment liquid, "ii" can produce printed materials with better color fastness to wet friction. The preparation method of "ii" is to prepare the raw material emulsions of the ionic group-containing silicone oil and the unmodified silicone oil in advance, and then mix the two emulsions to finally obtain the method for preparing the treatment liquid. In other words, the emulsified particles in the treatment liquid have better color fastness to wet friction by including first emulsified particles containing ionic group-containing silicone oil and second emulsified particles containing unmodified silicone oil. In addition, in the range where the content ratio of the unmodified silicone oil to the ionic group-containing silicone oil is greater than 1 / 3 and less than 1 (about 0.33 and less than 1), printed materials with better color fastness to wet friction can be produced.

[0227] The embodiments and examples disclosed this time are illustrative in all points and should not be construed as limiting. The scope of the present invention is indicated by the claims rather than the above description, and includes all modifications within the meaning and scope equivalent to the claims.

[0228] Industrial Applicability

[0229] The processing liquid, inkjet printing device and inkjet printing method according to the present invention can be used to form printed objects.

Claims

1. An inkjet treatment liquid, characterized in that Include: Emulsified particles containing silicone oil; and an aqueous medium, wherein The silicone oil includes ionic group-containing silicone oil and unmodified silicone oil.

2. The inkjet treatment liquid according to claim 1, characterized in that The emulsified particles include first emulsified particles containing the ionic group-containing silicone oil and second emulsified particles containing the unmodified silicone oil.

3. The inkjet treatment liquid according to claim 1, characterized in that The emulsified particles include: emulsified particles containing both the ionic group-containing silicone oil and the unmodified silicone oil.

4. The inkjet treatment liquid according to any one of claims 1 to 3, characterized in that In the inkjet treatment liquid, a content ratio of the unmodified silicone oil to the ionic group-containing silicone oil is 0.33 or more and 1 or less.

5. The inkjet treatment liquid according to any one of claims 1 to 4, characterized in that The viscosity of the ionic group-containing silicone oil is 500 mm 2 / s or more.

6. The inkjet treatment liquid according to any one of claims 1 to 5, characterized in that The ionic group-containing silicone oil contains at least one selected from the group consisting of carboxyl-modified silicone oil, amino-modified silicone oil, phenol-modified silicone oil, and silanol-modified silicone oil.

7. The inkjet treatment liquid according to any one of claims 1 to 6, characterized in that The viscosity of the unmodified silicone oil is 300 mm 2 / s or more.

8. The inkjet treatment liquid according to any one of claims 1 to 7, characterized in that The unmodified silicone oil contains dimethyl polysiloxane.

9. The inkjet treatment liquid according to any one of claims 1 to 8, characterized in that For printing.

10. An inkjet printing device, characterized in that include: A recording head ejects ink toward an image forming area of ​​a printed object; as well as A processing head ejects a processing liquid toward at least the image forming area of ​​the printing object, wherein The treatment liquid is the inkjet treatment liquid according to any one of claims 1 to 9.

11. An inkjet printing method, characterized in that include: An ink jetting step of jetting ink from a recording head toward an image forming area of ​​a printed object; as well as A processing step of ejecting a processing liquid from a processing head toward at least the image forming area of ​​the printing object, wherein: The treatment liquid is the inkjet treatment liquid according to any one of claims 1 to 9.

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