JP2019217759A - Inkjet printing apparatus, inkjet printing method, and glossiness control method of printed image - Google Patents

Abstract

An ink jet printing apparatus capable of coping with gloss control of both a matte tone and a glossy tone. An ink jet printing apparatus includes: an ink storage unit that stores ink; a discharge head that discharges ink to form a print layer; and a heating unit that heats an object to be printed. A non-aqueous clear ink containing an organic solvent and an organic solvent. Means for setting the temperature of the printing material in the mat printing area to be printed in the matte gloss printing mode when the non-aqueous clear ink is applied to the printing material to Tmatte (° C.), and the gloss when the non-aqueous clear ink is applied to the printing material Assuming that the temperature of the printing medium in the gloss print area to be printed in the glossy print mode is Tgloss (° C.), atte> Tgloss, an ink jet printing apparatus for heating to meet. [Selection diagram] None

Description

  The present invention relates to an inkjet printing apparatus, an inkjet printing method, and a method for controlling glossiness of a printed image.

  Non-permeable recording media such as plastic films are used to improve durability such as light resistance, water resistance, and abrasion resistance in packaging materials such as advertisements, signboards, and other foodstuffs, beverages, and daily necessities. Various inks for use in such non-permeable recording media have been developed.

As such an ink, for example, a solvent-based ink using an organic solvent as a solvent, an ultraviolet curable ink containing a polymerizable monomer as a main component, and the like are widely used. However, there is a concern that the solvent-based ink may affect the environment due to evaporation of the organic solvent. In the UV-curable ink, the choice of polymerizable monomers to be used may be limited from the viewpoint of safety.
Therefore, an ink set including a water-based ink that has a low environmental load and can be directly recorded on a non-permeable recording medium has been proposed.

On the other hand, an inkjet recording apparatus having a gloss control function has been developed.
For example, a liquid ejecting head that can eject ink containing thermoplastic resin particles from a nozzle toward a landing target, and a heating unit that heats ink droplets that have landed on the landing target, and the heating unit includes the ink unit. There has been proposed a liquid ejecting apparatus that controls the degree of film formation on the surface of the ink droplet by heating at a film formation control temperature corresponding to the minimum film formation temperature at which film formation on the surface of the droplet starts (for example, Patent Reference 1).

  SUMMARY OF THE INVENTION It is an object of the present invention to provide an ink jet printing apparatus capable of coping with both gloss control of matte tone and glossy tone.

An inkjet printing apparatus of the present invention as a means for solving the above-mentioned problems, an ink storage unit for storing ink, a discharge head for discharging the ink to form a print layer, a heating unit for heating a printing target, Wherein the ink is a non-aqueous clear ink containing a resin and an organic solvent, and the inkjet printing apparatus provides a matte gloss print mode and a glossy gloss, which are print modes for imparting a matte gloss. A glossy print mode, which is a printing mode in which the non-aqueous clear ink adheres to the print medium, and the heating means _sets the temperature of the print medium in the mat print area to be printed in the mat gloss print mode as T _matte (° C). And a gloss mark to be printed in a glossy gloss print mode when the non-aqueous clear ink is attached to a print substrate. When the temperature of the substrate region and _{T gloss (℃),} heated so as to satisfy the following _{equation, T matte>} T _gloss, a.

  According to the present invention, it is possible to provide an ink jet printing apparatus capable of coping with both matte and glossy gloss control.

FIG. 1 is a diagram illustrating an example of an image forming apparatus that performs the image forming method of the present invention. FIG. 2 is a perspective explanatory view showing an example of a main tank of the image forming apparatus of FIG.

(Inkjet printing apparatus and inkjet printing method)
An inkjet printing apparatus according to the present invention is an inkjet printing apparatus including an ink storage unit that stores ink, a discharge head that discharges ink to form a print layer, and a heating unit that heats a print target. Is a non-aqueous clear ink containing a resin and an organic solvent, and the inkjet printing apparatus performs a matte gloss print mode that is a print mode that provides matte gloss and a gloss gloss print mode that is a print mode that provides glossy gloss. The heating means _sets the temperature of the printing material in the mat printing area to be printed in the mat glossy printing mode when the non-aqueous clear ink is adhered to the printing material to T _matte (° C.), and _applies the non-aqueous clear ink to the printing material. The temperature of the printing medium in the gloss print area to be printed in the gloss gloss print mode when attaching is set to T _{gloss. Assuming} that the temperature is (° C.), heating is performed so as to satisfy the following equation: T _matte > T _gloss , and other means are provided as necessary.

An inkjet printing apparatus according to the present invention is an inkjet printing apparatus including an ink storage unit that stores ink, a discharge head that discharges ink to form a print layer, and a heating unit that heats a print target. Is a non-aqueous clear ink containing a resin and an organic solvent, and the inkjet printing apparatus performs a matte gloss print mode that is a print mode that provides matte gloss and a gloss gloss print mode that is a print mode that provides glossy gloss. When the temperature of the heating unit in the matte glossy printing mode is HT _matte (° C.) and the temperature of the heating unit in the gloss glossy printing mode is HT _gloss (° C.), the following formula is satisfied: HT _matte > HT _gloss Further, other means are provided as necessary.

The inkjet printing method of the present invention is an inkjet printing method including a printing step of providing a print layer by ejecting ink on a print target, and a heating step of heating the printed print target, wherein the ink is a resin, And a non-aqueous clear ink containing an organic solvent, and the inkjet printing method has a matte gloss print mode that is a print mode that gives matte gloss and a glossy print mode that is a print mode that gives glossy gloss. In the process, the temperature of the printing material in the mat printing area to be printed in the matte gloss printing mode when the non-aqueous clear ink is applied to the printing material is T _matte (° C.), and the non-aqueous clear ink is applied to the printing material. The temperature of the printing medium in the gloss print area to be printed in the gloss gloss print mode is defined as T _gloss (° C.). And heating to satisfy the following equation: T _matte > T _gloss , and further include other steps as necessary.

The ink-jet printing method of the present invention is an ink-jet printing method including a printing step of ejecting ink to a printing material to form a printing layer and a heating step of heating the printed printing material by a heating unit, wherein the ink is used. , A resin, and an organic solvent. The inkjet printing method has a matte gloss print mode, which is a print mode for imparting matte gloss, and a glossy print mode, which is a print mode for imparting glossy gloss. Then, _assuming that the temperature of the heating means in the matte glossy print mode is HT _matte (° C.) and the temperature of the heating means in the glossy glossy print mode is HT _gloss (° C.), the following equation is satisfied: HT _matte > HT _gloss Other steps are included as necessary.

2. Description of the Related Art Conventionally, in an inkjet recording apparatus using a clear ink (UV clear ink) that is cured by irradiation of ultraviolet rays, a gloss control method capable of controlling gloss in a matt or glossy tone by controlling the amount of irradiation has been proposed. .
However, the problem is that UV clear ink has a strong odor, and the odor remains in the printed matter, which is not suitable for printed matter for indoor use. For this reason, the installation place of the inkjet printing apparatus also needs an environment in which air can be exhausted, and the installation place is limited. Further, the UV clear ink requires an ultraviolet irradiation device, and has a problem that the size and cost of the device are increased.

  In the inkjet printing apparatus and inkjet printing method of the present invention, in the prior art of Patent Document 1, a film corresponding to the minimum film forming temperature at which film formation of the surface of an ink droplet is started by heating means using a color ink containing a color material is started. The gloss is adjusted by controlling the degree of film formation on the surface of the ink droplets by heating at the control temperature, but the color ink containing the color material is more sufficient than the clear ink containing no color material. It is based on the finding that a gloss difference cannot be obtained, and gloss control of both matte and glossy colors cannot be handled.

The inkjet printing apparatus and the inkjet printing method of the present invention use a non-aqueous clear ink containing a resin and an organic solvent, and perform gloss control in both gloss and mat by controlling the heating temperature. When matte gloss is applied, printing is performed at a higher temperature during printing than in the glossy mode. Because the printing temperature is high, the non-aqueous clear ink containing resin suppresses the spread and spread of dots, suppresses coalescence of adjacent dots, and forms dots with a high dot ball height (pile height). You. These dots form surface irregularities and give matt luster.
On the other hand, when gloss glossing is performed, printing is performed at a lower temperature than in the matte gloss mode. Since the temperature at the time of printing is low, the non-aqueous clear ink containing resin promotes wet spreading of dots and coalescence of adjacent dots, forms a smooth surface, and imparts gloss gloss.

Therefore, the inkjet printing apparatus of the present invention uses a non-aqueous clear ink containing a resin and an organic solvent, and is a matte gloss print mode which is a print mode for imparting matte gloss and a gloss gloss which is a print mode for imparting glossy gloss. A printing mode, wherein the heating means _sets the temperature of the printing material in a mat printing area to be printed in the mat glossy printing mode when the non-aqueous clear ink adheres to the printing material to T _matte (° C.) _Assuming that the temperature of the printing medium in the gloss printing area to be printed in the gloss gloss printing mode when attached to the printing medium is T _gloss (° C.), heating is performed so as to satisfy the following expression: T _matte > T _gloss . The temperature of the heating means in the matte glossy printing mode is HT _matte (° C.) _Assuming that the temperature of the heating means in the printing mode is HT _gloss (° C.), by satisfying the following expression, HT _matte > HT _gloss , it is possible to cope with both the gloss control in the matte tone and the glossy tone.

The heating means of the inkjet printing apparatus of the present invention heats the printing medium so that the temperature of the printing material satisfies the following equation: T _matte > T _gloss , and heats the printing medium to satisfy the following equation: T _matte −T _gloss ≧ 10 ° C. The heating is preferably performed so as to satisfy the following formula: T _matte −T _gloss ≧ 20 ° C. Further, as the temperature HT (° C.) of the heating means, assuming that the temperature of the heating means in the matte gloss print mode is HT _matte (° C.) and the temperature of the heat means in the gloss gloss print mode is HT _gloss (° C.), , HT _matte > HT _gloss , preferably HT _matte > HT _gloss ≧ 10 ° C., more preferably HT _matte > HT _gloss ≧ 20 ° C.
Accordingly, in the matte gloss print mode, the heating temperature is increased to suppress the spread of the dots, so that dots having a high pile height are formed, and a surface with large irregularities is formed. On the other hand, in the gloss gloss print mode, the heating temperature is lowered to promote the spread of wet dots, and a smooth surface can be formed by coalescence of adjacent dots.
The temperature HT (° C.) of the heating means is not particularly limited and can be appropriately selected depending on the purpose. For example, a set temperature of the heating means can be used.

The temperature T _matte (° C.) of the printing material in the printing section in the matte gloss print mode is preferably 50 ° C. or higher, more preferably 50 ° C. or higher and 80 ° C. or lower.
The temperature T _gloss (° C.) of the printing material in the printing section in the gloss glossy printing mode is preferably 70 ° C. or less, more preferably 60 ° C. or less.
The HT _matte (° C.) of the temperature of the heating means in the matte gloss print mode is preferably 50 ° C. or higher, more preferably 50 ° C. or higher and 80 ° C. or lower.
The HT _gloss (° C.) of the temperature of the heating means in the gloss gloss print mode is preferably 70 ° C. or less, more preferably 60 ° C. or less.
With such a temperature range, a large change in glossiness can be realized in each print mode using the non-aqueous clear ink.
The temperature of the printing medium in the printing unit is measured, for example, by installing a thermocouple on a recording medium as the printing medium and directly measuring the temperature of the recording medium, measuring the temperature of a heater that heats the recording medium, and measuring the temperature of the recording medium. And a method in which the temperature around the recording medium is measured in a non-contact manner with a radiation type thermometer or the like to obtain the recording medium temperature.

In the present invention, _assuming that the print rate of a mat print image to be printed in the _matte gloss print mode is D _matte and the print rate of a gloss print image to be printed in the gloss gloss print mode is D _gloss , the following equation is obtained: D _gloss > D _matte Is more preferably satisfied, and the following formula is satisfied: D _gloss -D _matte > 10%.
The higher the printing rate, the more easily the smooth surface is formed. Therefore, an image having a high printing rate is used in the gloss gloss print mode. On the other hand, in the matte gloss print mode, if the printing rate is high, coalescence of adjacent dots occurs, and it is difficult to form surface irregularities.
Here, the printing rate means the following. Printing rate (%) = number of dots printed by clear ink / (vertical resolution × horizontal resolution) × 100
(However, in the above formula, “the number of dots printed with clear ink” is the number of dots where clear ink is actually printed per unit area, and “vertical resolution” and “horizontal resolution” are the resolutions per unit area, respectively. In the case where clear ink is superimposed and printed so as to be at the same dot position, “the number of printed dots of clear ink” is represented by the total number of dots actually printed with clear ink per unit area.)
The printing rate of 100% means the maximum ink weight of a single color for a pixel.

<Ink storage section>
The ink storage unit stores the ink.
The ink storage section is not particularly limited as long as it can store ink, and examples thereof include an ink storage container and an ink tank.
The ink container contains the ink in a container, and further includes other members appropriately selected as necessary.
The container is not particularly limited and, depending on the purpose, its shape, structure, size, material, and the like can be appropriately selected.For example, an aluminum laminated film, an ink bag formed of a resin film, or the like can be used. Those having at least are mentioned.
Examples of the ink tank include a main tank and a sub tank.

<Discharge head>
The ejection head ejects ink to form a print layer.
The ejection head has a nozzle plate, a pressure chamber, and a stimulus generation unit.

-Nozzle plate-
The nozzle plate has a nozzle substrate and an ink-repellent film on the nozzle substrate.

−Pressure chamber−
The pressurizing chamber is a plurality of individual flow paths that are arranged individually corresponding to the plurality of nozzle holes provided in the nozzle plate, and communicates with the nozzle holes, an ink flow path, a pressurized liquid chamber, It may be called a pressure chamber, a discharge chamber, a liquid chamber, or the like.

-Stimulus generation means-
The stimulus generating means is a means for generating a stimulus to be applied to the ink.
The stimulus in the stimulus generation means is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include heat (temperature), pressure, vibration, and light. These may be used alone or in combination of two or more. Among these, heat and pressure are preferred.
Examples of the stimulus generating means include a heating device, a pressing device, a piezoelectric element, a vibration generating device, an ultrasonic oscillator, and a light. As the stimulus generating means, specifically, a piezoelectric actuator such as a piezoelectric element, a thermal actuator using an electrothermal conversion element such as a heating resistor to utilize a phase change due to ink film boiling, and a metal phase change due to a temperature change And an electrostatic actuator using electrostatic force.

When the stimulus is “heat”, thermal energy corresponding to a recording signal is applied to the ink in the ink ejection head using, for example, a thermal head. A method may be used in which bubbles are generated in the ink by the thermal energy, and the ink is ejected as droplets from the nozzle holes of the nozzle plate by the pressure of the bubbles.
When the stimulus is “pressure”, for example, the piezoelectric element bends by applying a voltage to the piezoelectric element bonded to a position called the pressure chamber in the ink flow path in the ink ejection head. . Thereby, there is a method in which the volume of the pressure chamber is contracted, and the ink is ejected as droplets from the nozzle holes of the ink ejection head.
Among these, the piezo method in which a voltage is applied to the piezo element to fly the ink is preferable.

<Heating means>
The heating means heats the printing substrate.
The heating unit includes a unit for heating and drying the printing surface or the back surface of the recording medium as the printing medium, and includes, for example, an infrared heater, a hot air heater, and a heating roller. These may be used alone or in combination of two or more.

The method of drying the recording medium as a printing medium is not particularly limited and can be appropriately selected depending on the purpose. For example, a heated fluid such as hot air may be used as a drying unit on the recording medium to which the ink is applied. , A method in which the recording medium with the ink applied thereto is brought into contact with a heating member to heat by heat transfer, and a method in which the recording medium to which the ink is applied by irradiating energy rays such as infrared rays and far infrared rays. And the like.
The heating can be performed before printing, during printing, and / or after printing.
Heating before and during printing makes it possible to print on a heated medium, and heating after printing makes it possible to dry printed matter.
The heating time is not particularly limited as long as the surface temperature of the recording medium can be controlled to a desired temperature, and can be appropriately selected depending on the purpose.
The control of the heating time is preferably performed by controlling the transport speed of a recording medium as a printing medium.

<Ink>
As the ink, a non-aqueous clear ink is used.
The clear ink means a colorless and transparent ink substantially containing no coloring material.
The non-aqueous clear ink means a clear ink containing an organic solvent as a solvent, and does not substantially contain water.
The non-aqueous clear ink preferably contains an organic solvent and a resin, preferably contains a surfactant, and further contains other components as necessary.

<< Resin >>
The resin is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include a polyurethane resin, a polyester resin, an acrylic resin, a vinyl acetate resin, a styrene resin, a butadiene resin, a styrene-butadiene resin, and a vinyl chloride resin. Acryl-styrene resin, acryl-silicone resin and the like.
When producing the ink, it is preferable to add it as resin particles composed of these resins. The resin particles may be added to the ink in the state of a resin emulsion in which water is used as a dispersion medium. As the resin particles, appropriately synthesized ones or commercially available ones may be used. These may be used alone or in combination of two or more resin particles.

  Further, non-aqueous emulsion-type polymer particles can also be used as the resin. The non-aqueous emulsion-type polymer particles are a dispersion in which particles of a polyurethane resin, an acrylic resin, an acrylic polyol resin, and the like are stably dispersed in an organic solvent. For example, examples of the polyurethane resin include “Samprene IB-501” and “Samprene IB-F370” manufactured by Sanyo Chemical Industries, Ltd. Examples of the acrylic polyol resin include "N-2043-60MEX" and "N-2043-AF-1" manufactured by Harima Chemicals, Inc.

  The content of the resin contained in the non-aqueous clear ink is preferably 9% by mass or more, more preferably 9% by mass or more and 25% by mass or less. When the content of the resin is 9% by mass or more, mat gloss and gloss gloss can be controlled with a small amount of clear ink. On the other hand, when the content of the resin exceeds 25% by mass, the ejection stability of the ink may be reduced.

Matte gloss is realized by forming isolated dots having a high height (pile height) of dot spheres and providing irregularities on the surface.
When the content of the resin in the clear ink is large, it is preferable because dots having a high pile height are easily formed and a mat gloss is easily imparted.
On the other hand, gloss gloss imparts smoothness by filling unevenness on the surface with clear ink to form a smooth surface. In order to fill the surface irregularities with the clear ink, it is preferable that the content of the resin in the clear ink is large because the surface irregularities can be filled with a small amount of the clear ink and gloss gloss can be easily imparted.

<< Organic solvent >>
Examples of the organic solvent include polar organic solvents such as alcohols (eg, methyl alcohol, ethyl alcohol, propyl alcohol, butyl alcohol, isopropyl alcohol, and fluorinated alcohol), ketones (eg, acetone, methyl ethyl ketone, and cyclohexanone). Carboxylic acid esters (eg, methyl acetate, ethyl acetate, propyl acetate, butyl acetate, methyl propionate, ethyl propionate, etc.), or ethers (eg, diethyl ether, dipropyl ether, alkylene glycol ether compounds) , Tetrahydrofuran, or dioxane). These may be used alone or in combination of two or more.

  Among them, the organic solvent preferably contains one or more alkylene glycol ether compounds which are liquid at normal temperature and normal pressure.

  The alkylene glycol ether compound is an ethylene glycol based on methyl, n-propyl, i-propyl, n-butyl, i-butyl, hexyl, 2-ethylhexyl aliphatic, double-bonded allyl and phenyl groups. There are ethers and propylene glycol ethers, which are colorless, have little odor, and have both ether and hydroxyl groups in the molecule. . Further, there are a monoether type in which only one hydroxyl group is substituted and a diether type in which both hydroxyl groups are substituted, and these can be used in combination of plural kinds.

  In particular, it is preferable that the organic solvent contains at least one selected from an alkylene glycol diether compound, an alkylene glycol monoether compound, and a lactone compound.

  Examples of the alkylene glycol monoether compound include, for example, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether, ethylene glycol monohexyl ether, ethylene glycol monophenyl ether, diethylene glycol monomethyl ether, and diethylene glycol monomethyl ether. Ethyl ether, diethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, triethylene glycol monobutyl ether, tetraethylene glycol monomethyl ether, tetra Ethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, dipropylene glycol monomethyl ether, and dipropylene glycol monoethyl ether. These may be used alone or in combination of two or more.

  Examples of the alkylene glycol diether compound include, for example, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dibutyl ether, triethylene glycol dimethyl ether, triethylene glycol diethyl ether, triethylene glycol diether. Butyl ether, tetraethylene glycol dimethyl ether, tetraethylene glycol diethyl ether, tetraethylene glycol dibutyl ether, propylene glycol dimethyl ether, propylene glycol diethyl ether, dipropylene glycol dimethyl ether, dipropylene glycol diethyl Such as ether, and the like. These may be used alone or in combination of two or more.

Examples of the lactone compound include γ-butyrolactone, δ-valerolactone, ε-caprolactone, and the like.
Other non-aqueous solvents include, for example, lactic acid ester, propylene glycol monomethyl ether acetate (PMA), 2-butoxyethyl acetate (BMGAC), propylene diglycol acetate (PGDA), dipropylene glycol dimethyl ether (DMM), 3-methoxy- Examples include n-butyl-acetate (MBA), 1-butoxy-2-propanol (PNB), 2-octanone, and the like.

  The content of the organic solvent in the non-aqueous clear ink is not particularly limited and can be appropriately selected depending on the intended purpose. Is preferably, and more preferably 20% by mass or more and 60% by mass or less.

<Surfactant>
The non-aqueous clear ink preferably contains a surfactant.
By adding a surfactant to the ink, the surface tension is reduced, and the penetration of the ink droplet into the recording medium after the ink droplet lands on the recording medium, such as paper, becomes faster, so that feathering and color bleeding are reduced. Can be.
Surfactants are classified into nonionic, anionic and amphoteric according to the polarity of the hydrophilic group.
Further, they are classified into fluorine-based, silicone-based, acetylene-based, and the like according to the structure of the hydrophobic group.
In the present invention, a fluorine-based surfactant is mainly used, but a silicone-based surfactant and an acetylene-based surfactant may be used in combination.
The content of the surfactant is preferably 2% by mass or less, more preferably 0.05% by mass or more and 2% by mass or less, and further preferably 0.1% by mass or more and 2% by mass or less. By setting the content of the surfactant to 2% by mass or less, a large reduction in glossiness can be obtained in the matte gloss print mode.

As the surfactant, any of a silicone-based surfactant, a fluorine-based surfactant, an amphoteric surfactant, a nonionic surfactant, and an anionic surfactant can be used.
The silicone surfactant is not particularly limited and can be appropriately selected depending on the purpose. Among them, those which do not decompose even at high pH are preferable, and examples thereof include side-chain-modified polydimethylsiloxane, both-end-modified polydimethylsiloxane, one-end-modified polydimethylsiloxane, and both-chain-end both-end modified polydimethylsiloxane. Those having an oxyethylene group or a polyoxyethylene polyoxypropylene group are particularly preferred because they exhibit good properties as an aqueous surfactant. Further, as the silicone-based surfactant, a polyether-modified silicone-based surfactant can also be used, and examples thereof include a compound in which a polyalkylene oxide structure is introduced into the side chain of the Si portion of dimethylsiloxane.
Examples of the fluorine-based surfactant include a perfluoroalkylsulfonic acid compound, a perfluoroalkylcarboxylic acid compound, a perfluoroalkylphosphate compound, a perfluoroalkylethylene oxide adduct, and a perfluoroalkylether group in the side chain. Polyoxyalkylene ether polymer compounds are particularly preferred because of their low foaming properties. Examples of the perfluoroalkylsulfonic acid compound include perfluoroalkylsulfonic acid, perfluoroalkylsulfonic acid salt, and the like. Examples of the perfluoroalkylcarboxylic acid compound include perfluoroalkylcarboxylic acid and perfluoroalkylcarboxylic acid salt. Examples of the polyoxyalkylene ether polymer compound having a perfluoroalkyl ether group in a side chain include a sulfate salt of a polyoxyalkylene ether polymer having a perfluoroalkyl ether group in a side chain, and having a perfluoroalkyl ether group in a side chain. Salts of a polyoxyalkylene ether polymer are exemplified. The counter ions of the salts in these fluorinated surfactants include Li, Na, K, NH ₄ , NH ₃ CH ₂ CH ₂ OH, NH ₂ (CH ₂ CH ₂ OH) ₂ , and NH (CH ₂ CH ₂ OH) _{3 and the} like.
Examples of the amphoteric surfactant include lauryl aminopropionate, lauryl dimethyl betaine, stearyl dimethyl betaine, lauryl dihydroxyethyl betaine, and the like.
Examples of the nonionic surfactant include polyoxyethylene alkyl phenyl ether, polyoxyethylene alkyl ester, polyoxyethylene alkylamine, polyoxyethylene alkyl amide, polyoxyethylene propylene block polymer, sorbitan fatty acid ester, polyoxyethylene sorbitan Fatty acid esters and ethylene oxide adducts of acetylene alcohol are exemplified.
Examples of the anionic surfactant include polyoxyethylene alkyl ether acetate, dodecylbenzene sulfonate, laurylate, and polyoxyethylene alkyl ether sulfate.
These may be used alone or in combination of two or more.

The silicone-based surfactant is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include side chain-modified polydimethylsiloxane, both-terminal-modified polydimethylsiloxane, one-terminal-modified polydimethylsiloxane, and one-terminal-modified polydimethylsiloxane. Polydimethylsiloxane modified at both ends of the chain and the like, and polyoxyethylene group as a modifying group, and a polyether-modified silicone surfactant having a polyoxyethylene polyoxypropylene group exhibit particularly good properties as an aqueous surfactant, so preferable.
As such a surfactant, an appropriately synthesized one may be used, or a commercially available product may be used. Commercially available products can be obtained from, for example, Big Chemie Co., Ltd., Shin-Etsu Chemical Co., Ltd., Dow Corning Toray Silicone Co., Ltd., Nippon Emulsion Co., Ltd., Kyoeisha Chemical Co., Ltd.
The polyether-modified silicone-based surfactant is not particularly limited and may be appropriately selected depending on the purpose. For example, a polyalkylene oxide structure represented by the following general formula (S-1) may be used. Those introduced into the side chain of the dimethylpolysiloxane in the Si portion are exemplified.

[General formula (S-1)]
(In the formula (S-1), m, n, a, and b each independently represent an integer, R represents an alkylene group, and R ′ represents an alkyl group.)

  As the above-mentioned polyether-modified silicone-based surfactant, commercially available products can be used. For example, KF-618, KF-642, KF-643 (manufactured by Shin-Etsu Chemical Co., Ltd.), EMALEX-SS-5602, SS -1906EX (manufactured by Japan Emulsion Co., Ltd.), FZ-2105, FZ-2118, FZ-2154, FZ-2161, FZ-2162, FZ-2163, FZ-2164 (manufactured by Dow Corning Toray Silicone Co., Ltd.), BYK -33, BYK-387 (manufactured by Big Chemie), TSF4440, TSF4452, and TSF4453 (manufactured by Toshiba Silicon Corporation).

As the fluorine-based surfactant, a fluorine-substituted compound having 2 to 16 carbon atoms is preferable, and a fluorine-substituted compound having 4 to 16 carbon atoms is more preferable.
Examples of the fluorine-based surfactant include a perfluoroalkyl phosphate ester compound, a perfluoroalkyl ethylene oxide adduct, and a polyoxyalkylene ether polymer compound having a perfluoroalkyl ether group in a side chain. Among these, a polyoxyalkylene ether polymer compound having a perfluoroalkyl ether group in the side chain is preferable because of low foaming property, and is particularly represented by the following general formulas (F-1) and (F-2). Fluorinated surfactants are preferred.

[General formula (F-1)]
In the compound represented by the formula (F-1), m is preferably an integer of 0 to 10, and n is preferably an integer of 0 to 40 in order to impart water solubility.

[General formula (F-2)]
_{C n F 2n + 1- CH 2} CH (OH) CH 2 -O- (CH 2 CH 2 O) a -Y
In the compound represented by the general formula (F-2), Y is H, or _C m _{F 2m + 1} with m is an integer of 1 to 6, or _{CH 2 CH (OH) CH 2} -C m F 2m + 1 m is P is an integer of 1 to 19, or an integer of 4 to 6 or C _p H _{2p + 1} . n is an integer of 1 to 6. a is an integer of 4 to 14.

A commercially available product may be used as the above-mentioned fluorine-based surfactant.
Examples of commercially available products include Surflon S-111, S-112, S-113, S-121, S-131, S-132, S-141, and S-145 (all manufactured by Asahi Glass Co., Ltd.); Fullard FC-93, FC-95, FC-98, FC-129, FC-135, FC-170C, FC-430, FC-431 (all manufactured by Sumitomo 3M Limited); Megafac F-470, F -1405, F-474 (all manufactured by DIC Corporation); Zonyl TBS, FSP, FSA, FSN-100, FSN, FSO-100, FSO, FS-300, UR, Capstone FS-30, FS-31, FS-3100, FS-34, FS-35 (all manufactured by Chemours); FT-110, FT-250, FT-251 FT-400S, FT-150, FT-400SW (all manufactured by Neos Co., Ltd.), Polyfox PF-136A, PF-156A, PF-151N, PF-154, PF-159 (manufactured by OMNOVA), Unidyne DSN -403N (manufactured by Daikin Industries, Ltd.). Among these, FS-3100, FS-34, FS-300, and Neos Co., Ltd. manufactured by Chemours Co., Ltd., from the viewpoint of significantly improving good print quality, particularly color development, permeability to paper, wettability, and levelness. FT-110, FT-250, FT-251, FT-400S, FT-150, FT-400SW manufactured by Omnova, Polyfox PF-151N manufactured by OMNOVA, and Unidyne DSN-403N manufactured by Daikin Industries, Ltd. are particularly preferable.

  The non-aqueous clear ink may contain, as necessary, an antifoaming agent, an antiseptic / antifungal agent, a rust inhibitor, a pH adjuster, and the like as other components.

-Antifoaming agent-
The defoaming agent is not particularly limited, and examples thereof include a silicone-based defoaming agent, a polyether-based defoaming agent, and a fatty acid ester-based defoaming agent. These may be used alone or in combination of two or more. Among these, silicone-based antifoaming agents are preferred because of their excellent foam breaking effect.

-Antiseptic / antifungal agent-
The antiseptic / antifungal agent is not particularly limited, and examples thereof include 1,2-benzisothiazolin-3-one.

-Rust inhibitor-
The rust inhibitor is not particularly limited, and examples thereof include acidic sulfites and sodium thiosulfate.

-PH adjuster-
The pH adjuster is not particularly limited as long as the pH can be adjusted to 7 or more, and examples thereof include amines such as diethanolamine and triethanolamine.

The physical properties of the non-aqueous clear ink are not particularly limited and can be appropriately selected depending on the purpose. For example, the viscosity, surface tension, pH, and the like are preferably in the following ranges.
The viscosity of the non-aqueous clear ink at 25 ° C. is preferably from 5 mPa · s to 30 mPa · s, and more preferably from 5 mPa · s to 25 mPa · s, from the viewpoints of improving print density and character quality and obtaining good ejection properties. s or less is more preferable. Here, for the viscosity, for example, a rotary viscometer (RE-80L, manufactured by Toki Sangyo Co., Ltd.) can be used. As measurement conditions, measurement can be performed at 25 ° C. with a standard cone rotor (1 ° 34 ′ × R24), a sample liquid amount of 1.2 mL, a rotation speed of 50 rpm, and 3 minutes.
The surface tension of the nonaqueous clear ink is preferably 35 mN / m or less, more preferably 32 mN / m or less at 25 ° C., from the viewpoint that the ink is suitably leveled on the recording medium and the drying time of the ink is shortened. .
The pH of the non-aqueous clear ink is preferably from 7 to 12, and more preferably from 8 to 11, from the viewpoint of preventing corrosion of the metal member in contact with the liquid.

<Printed material>
The material to be printed is not limited to those used as recording media, and for example, building materials such as wallpaper, flooring materials, tiles, cloth for clothing such as T-shirts, textiles, and leather can be used as appropriate. By adjusting the configuration of the path for transporting the recording medium, ceramics, glass, metal, or the like can be used as the print target.
The recording medium is not particularly limited, and plain paper, glossy paper, special paper, cloth, and the like can be used. However, a good image can be formed even by using a non-permeable base material.
The non-permeable substrate is a substrate having a surface with low water permeability and low absorptivity, and includes a material that does not open to the outside even if there are many cavities inside, and more quantitatively. In the Bristow method, it refers to a base material having a water absorption of 10 mL / m ² or less from 30 msec ^1/2 after the start of contact.
As the non-permeable substrate, for example, a plastic film such as a vinyl chloride resin film, a polyethylene terephthalate (PET) film, an acrylic resin film, a polypropylene film, a polyethylene film, and a polycarbonate film can be suitably used.

In the present invention, in the matte gloss print mode, it is preferable to use a printing material having a high glossiness. A printed material having a higher glossiness is preferable because the matte gloss effect by the clear ink is easily emphasized.
On the other hand, in the gloss gloss print mode, it is preferable to use a printing material having low gloss. A printing material having a low glossiness is preferable because the glossy gloss effect by the clear ink is easily emphasized.
Therefore, the glossiness of the substrate used in the matt gloss print mode and _{G matte,} the gloss of the substrate and _{G gloss} used in gloss gloss print mode, the following _equation, it is preferable to satisfy the _{G matte>} G _gloss,, It is more preferable to satisfy the following formula: G _matte -G _gloss ≧ 100.

(Method of controlling glossiness of print image)
A printing step of forming a printing layer by ejecting ink on a printing object,
A heating step of heating the printed substrate,
A gloss control method for a print image including:
The ink is a resin, and a non-aqueous clear ink containing an organic solvent,
The method for controlling the glossiness of a print image includes a matte gloss print mode that is a print mode that provides matte gloss and a gloss gloss print mode that is a print mode that provides glossy gloss.
When printing in the matte gloss print mode, perform control to increase the heating temperature,
When printing in the gloss gloss print mode, control is performed to lower the heating temperature.

(Printed matter)
The printed material of the present invention is a printed material having a printed layer on the printed material,
The printing layer comprises a clear ink layer containing a resin,
The printed matter has a mat print image to be printed in a matte gloss print mode, and a gloss print image to be printed in a gloss gloss print mode,
A gloss difference (Ga−Gb) between the 60 ° gloss Ga of the gloss print image and the 60 ° gloss Gb of the printing medium used in the gloss gloss print mode is 20 or more;
The gloss difference (Gc-Gd) between the 60 ° gloss Gc of the matte printed image and the 60 ° gloss Gd of the printing medium used in the matte gloss print mode is −20 or less.
An image can be formed by an inkjet printing apparatus and an inkjet printing method to obtain a printed material.

<Recording device and recording method>
In the following description of the recording apparatus and the recording method, a case will be described in which black (K) ink, cyan (C) ink, magenta (M) ink, and yellow (Y) ink are used. In addition, a non-aqueous clear ink may be used.
The non-aqueous clear ink used in the present invention can be suitably used in various recording apparatuses using an ink jet recording system, for example, a printer, a facsimile apparatus, a copying apparatus, a combined printer / fax / copier machine, and a three-dimensional printing apparatus.
Unless particularly limited, the inkjet printing apparatus includes both a serial type apparatus that moves the ejection head and a line type apparatus that does not move the ejection head.
Further, the ink jet printing apparatus includes not only a desktop type but also a wide recording apparatus, and a continuous printer which can use, for example, continuous paper wound in a roll shape as a recording medium.
In the present invention, a recording device and a recording method are a device capable of ejecting ink and various processing liquids to a recording medium, and a method of performing recording using the device. The recording medium means a medium to which ink and various processing liquids can be attached even temporarily.
This recording apparatus can include not only a head portion for discharging ink, but also means for feeding, transporting, and discharging a recording medium, and other devices referred to as a pre-processing device and a post-processing device. .
Further, the recording apparatus and the recording method are not limited to those in which a significant image such as a character or a graphic is visualized by ink. For example, those that form patterns such as geometric patterns and the like that form three-dimensional images are also included.
Further, the recording apparatus includes both a serial type apparatus that moves the ejection head and a line type apparatus that does not move the ejection head, unless otherwise limited.
Furthermore, this recording apparatus can use not only a desktop type but also a wide recording apparatus that enables printing on an A0 size recording medium, for example, a continuous paper wound in a roll shape can be used as the recording medium. It also includes a simple continuous printer.
An example of the recording apparatus will be described with reference to FIGS. FIG. 1 is an explanatory perspective view of the recording apparatus. FIG. 2 is a perspective explanatory view of the main tank. The image forming apparatus 400 as an example of the recording apparatus is a serial type image forming apparatus. A mechanism section 420 is provided inside an exterior 401 of the image forming apparatus 400. Each ink storage section 411 of the main tank 410 (410k, 410c, 410m, 410y) for each color of black (K), cyan (C), magenta (M), and yellow (Y) is made of, for example, an aluminum laminate film or the like. It is formed by a packaging member. The ink storage unit 411 is stored in a storage container case 414 made of, for example, plastics. Thus, the main tank 410 is used as an ink cartridge for each color.
On the other hand, a cartridge holder 404 is provided behind the opening when the cover 401c of the apparatus main body is opened. The main tank 410 is detachably mounted on the cartridge holder 404. Thus, the ink discharge ports 413 of the main tank 410 and the discharge heads 434 for the respective colors communicate with each other via the supply tubes 436 for the respective colors, and the ink can be discharged from the discharge heads 434 to the recording medium.

The recording apparatus can include not only a portion for discharging ink but also a device called a pre-processing device or a post-processing device.
As one mode of the pre-processing device and the post-processing device, as in the case of inks such as black (K), cyan (C), magenta (M), and yellow (Y), a liquid having a pre-processing liquid and a post-processing liquid There is a mode in which a pre-treatment liquid and a post-treatment liquid are ejected by an ink jet recording method by adding a storage section and a liquid ejection head.
As another embodiment of the pre-processing device and the post-processing device, there is a mode in which a pre-processing device and a post-processing device other than the ink jet recording method, for example, by a blade coating method, a roll coating method, and a spray coating method are provided.

  The method of using the ink is not limited to the ink jet recording method, but can be widely used. In addition to the ink jet recording method, for example, a blade coating method, a gravure coating method, a bar coating method, a roll coating method, a dip coating method, a curtain coating method, a slide coating method, a die coating method, a spray coating method and the like can be mentioned.

The use of the ink is not particularly limited and can be appropriately selected depending on the purpose. For example, the ink can be applied to printed matter, paint, coating material, base material, and the like. Further, it can be used not only to form two-dimensional characters and images using ink, but also as a three-dimensional modeling material for forming a three-dimensional three-dimensional image (three-dimensional object).
As the three-dimensional modeling device for modeling the three-dimensional molded object, a known three-dimensional modeling device can be used, and is not particularly limited. For example, a device including an ink storage unit, a supply unit, a discharge unit, a drying unit, and the like is used. be able to. The three-dimensional object includes a three-dimensional object obtained by, for example, over-coating ink. Further, a molded product obtained by processing a structure obtained by applying ink on a base material such as a recording medium is also included. The molded product is obtained by subjecting a recording material and a structure formed in a sheet shape or a film shape to a molding process such as a heat stretching process and a punching process. -It is suitably used for applications such as electronic equipment, meters such as cameras, panels of operation units, etc., which are formed after decorating the surface.

  Further, image forming, recording, printing, printing and the like in the terms of the present invention are all synonymous.

  A recording medium, a medium, and a printed material are all synonyms.

  Hereinafter, examples of the present invention will be described, but the present invention is not limited to these examples.

(Production Example 1)
-Production of non-aqueous clear ink A-
19.5% by mass of a commercially available urethane resin solution (SAMPLEN IB-F370, manufactured by Sanyo Chemical Industries, Ltd., nonvolatile content: 40% by mass, non-aqueous solvent: mixed solvent of methoxypropanol and isopropanol), 55% by mass of diethylene glycol diethyl ether , Γ-butyrolactone 13.1% by mass, tetraethylene glycol dimethyl ether 10% by mass, silicone-based surfactant (BYK-UV3500, manufactured by BYK) 0.6% by mass, and acetylene glycol-based surfactant (E-1010, 1.8 mass% (manufactured by Nissin Chemical Industry Co., Ltd.) was added, and mixed and stirred to prepare a mixture.
Next, the obtained mixture was filtered through a polypropylene filter having an average pore size of 0.2 μm (trade name: Betafine polypropylene pleated filter PPG series, manufactured by 3M) to produce a non-aqueous clear ink A.

(Production Examples 2 to 5)
-Production of non-aqueous clear inks B to E-
Non-aqueous clear inks B to E were produced in the same manner as in Production Example 1 except that the ink compositions shown in Table 1 were changed.

Details of each component in Table 1 are as follows.
* Urethane resin solution (SAMPLEN IB-F370, manufactured by Sanyo Chemical Industries, Ltd., nonvolatile content: 40% by mass, non-aqueous, solvent: mixed solvent of methoxypropanol and isopropanol)
* Acrylic resin liquid (N-2043-60MEX, manufactured by Harima Chemicals, Inc., nonvolatile content: 60% by mass)
* Silicone-based surfactant (BYK-UV3500, manufactured by BYK)
* Acetylene glycol surfactant (E-1010, manufactured by Nissin Chemical Industry Co., Ltd.)

(Production Example 6)
-Manufacture of magenta ink-
As shown in Table 2 below, 3 parts by mass of a magenta pigment (Pigment Red 122, trade name: toner magenta EO02, manufactured by Clariant Japan KK), 0.5 parts by mass of a dispersant (polyester compound), and diethylene glycol diethyl ether After premixing 58.5 parts by mass, a magenta pigment dispersion was obtained by circulating and dispersing for 3 hours in a disk-type bead mill (KDL type, manufactured by Shinmaru Enterprises Co., Ltd., using a zirconia ball having a diameter of 0.3 mm). Obtained.

Next, 62 parts by mass of the obtained magenta pigment dispersion, 12.5 parts by mass of a urethane resin (SAMPLEN IB-F370, manufactured by Sanyo Chemical Industries, Ltd.), 13.1 parts by mass of γ-butyrolactone, and 10 parts by mass of tetraethylene glycol dimethyl ether Parts, 0.6 parts by mass of a silicone-based surfactant (BYK-UV3500) and 1.8 parts by mass of an acetylene glycol-based surfactant (E-1010) were mixed and stirred to prepare a mixture.
The resulting mixture was filtered through a polypropylene filter having an average pore diameter of 0.2 μm (trade name: Betafine polypropylene pleated filter PPG series, manufactured by 3M) to produce a magenta ink.

(Example 1)
<Inkjet printing>
The ink cartridge of the ink jet printer GXe5500 modified machine (manufactured by Ricoh Co., Ltd.) was filled with the non-aqueous clear ink A of Production Example 1, and the ink cartridge filled with the ink was mounted on the ink jet printer GXe5500 modified machine, and ink jet printing was performed. .
The modified inkjet printer GXe5500 was provided with a heater (temperature control controller, model MTCD, manufactured by MISUMI Corporation) so that the recording medium could be heated from the back surface before, during, and after printing. Thus, printing can be performed on the recording medium heated by the heater before and during printing, and the printed matter can be heated and dried by the heater after printing.
In the gloss gloss print mode and the mat gloss print mode, printing was performed by changing the type of recording medium, heating conditions, and print image.

-Recording medium-
In the gloss gloss print mode, as the recording medium 1, synthetic paper VJFN160 (white polypropylene film, gloss 16 (60 ° gloss value)) manufactured by Yupo Corporation was used.
In the matte gloss print mode, a window film GIY-0305 (a transparent polyethylene terephthalate (PET) film, glossiness 159 (60 ° gloss value)) manufactured by Lintec Sign System Co., Ltd. was used as the recording medium 2.

-Heating conditions-
The heating conditions were set to 45 ° C., 45 ° C., and 60 ° C. for the heaters (heating means) arranged before, during, and after the printing in the gloss gloss printing mode. In the matte gloss print mode, the heating temperature of each heater (heating means) was set to 60 ° C, 60 ° C, and 60 ° C. When the temperature of the recording medium during printing is measured, the recording medium temperature (= T _gloss ) in the gloss gloss print mode is 45 ° C., and the temperature of the heating means in the gloss gloss print mode during printing (= HT _gloss (° C.)) Is 45 ° C. When the temperature of the recording medium during printing is measured, the recording medium temperature (= T _matte ) in the matte gloss print mode is 59 ° C., and the temperature of the heating means (= HT _matte (° C.) in the matte gloss print mode during printing. )) Is 60 ° C.
The temperature of the recording medium during printing was measured by a digital radiation temperature sensor (FT-H10, manufactured by Keyence Corporation).
The image printed in the gloss gloss print mode was a solid image with an image resolution of 600 dpi × 600 dpi and a print rate of 100%.
The image printed in the matte gloss print mode was a halftone image with an image resolution of 600 dpi × 600 dpi and a print ratio of 40%.

−Print rate−
Here, the printing ratio means the following here.
Printing rate (%) = number of dots printed by clear ink / (vertical resolution × horizontal resolution) × 100
(However, in the above formula, “the number of dots printed with clear ink” is the number of dots where clear ink is actually printed per unit area, and “vertical resolution” and “horizontal resolution” are the resolutions per unit area, respectively. (When printing with clear ink overlaid so as to be at the same dot position, the "number of dots printed with clear ink" is represented by the total number of dots actually printed with clear ink per unit area.)
In both the matte gloss print mode and the gloss gloss print mode, printing was performed by applying the non-aqueous clear ink A directly onto the recording medium once so as to overlap the same dot position.
Next, the glossiness of the obtained printed matter was measured as follows. The results are shown in Table 4.

<Gloss>
The 60 ° gloss value of each of the clear ink printed portion where the non-aqueous clear ink A was printed and the clear ink non-printed portion (recording medium) where the non-aqueous clear ink A was not printed was measured using a gloss measuring device (Micro Trigloss). , Manufactured by BYK). The 60 ° gloss value was defined as the gloss.

(Example 2)
In the first embodiment, the image printed in the gloss gloss print mode is changed to a halftone image with an image resolution of 600 dpi × 600 dpi and a print ratio of 80%, and the image printed in the mat gloss print mode is converted to an image resolution of 600 dpi × Inkjet printing was performed in the same manner as in Example 1 except that the printing ratio was changed to a halftone image with a printing rate of 70% at 600 dpi.
The glossiness of the obtained printed matter was measured in the same manner as in Example 1. The results are shown in Table 4.

(Example 3)
In Example 1, the heating conditions were set to 40 ° C., 40 ° C., and 60 ° C. for the heaters before, during, and after printing in the gloss gloss print mode. Ink jet printing was performed in the same manner as in Example 1 except that the heating temperature of was set at 65 ° C., 65 ° C., and 65 ° C.
The glossiness of the obtained printed matter was measured in the same manner as in Example 1. The results are shown in Table 4.
When the recording medium temperature during printing is measured, the recording medium temperature (= T _gloss ) in the gloss gloss print mode is 40 ° C., and the temperature of the heating means in the gloss gloss print mode during printing (= HT _gloss (° C.)) ) Is 40 ° C. Also, when the temperature of the recording medium during printing is measured, the recording medium temperature (= T _matte ) in the matte gloss print mode is 64 ° C., and the temperature of the heating means (= HT _matte (° C.) in the matte gloss print mode during printing. )) Is 65 ° C.

(Example 4)
Ink jet printing was performed in the same manner as in Example 3, except that the non-aqueous clear ink A of Production Example 1 was changed to the non-aqueous clear ink B of Production Example 2.
The glossiness of the obtained printed matter was measured in the same manner as in Example 1. The results are shown in Table 4.

(Example 5)
Ink jet printing was performed in the same manner as in Example 3, except that the non-aqueous clear ink A of Production Example 1 was changed to the non-aqueous clear ink C of Production Example 3.
The glossiness of the obtained printed matter was measured in the same manner as in Example 1. The results are shown in Table 4.

(Example 6)
Ink jet printing was performed in the same manner as in Example 3, except that the non-aqueous clear ink A of Production Example 1 was changed to the non-aqueous clear ink D of Production Example 4.
The glossiness of the obtained printed matter was measured in the same manner as in Example 1. The results are shown in Table 4.

(Example 7)
Ink jet printing was performed in the same manner as in Example 3, except that the non-aqueous clear ink A of Production Example 1 was changed to the non-aqueous clear ink E of Production Example 5.
The glossiness of the obtained printed matter was measured in the same manner as in Example 1. The results are shown in Table 4.

(Comparative Example 1)
In the same manner as in Example 2 except that the heater temperature setting in the gloss gloss print mode was set to 50 ° C., 50 ° C., and 60 ° C. in the gloss gloss print mode in Example 2, Printing was done.
The glossiness of the obtained printed matter was measured in the same manner as in Example 1. The results are shown in Table 4.
When the recording medium temperature during printing is measured, the recording medium temperature (= T _gloss ) in the gloss gloss print mode is 49 ° C., and the temperature of the heating means in the gloss gloss print mode during printing (= HT _gloss (° C.)) ) Is 50 ° C. Also, when the temperature of the recording medium during printing is measured, the recording medium temperature (= T _matte ) in the matte gloss print mode is 49 ° C., and the temperature of the heating means (= HT _matte (° C.) in the matte gloss print mode during printing). )) Is 50 ° C.

(Comparative Example 2)
In the same manner as in Example 1, except that the heater temperature setting in the gloss gloss print mode was set to 60 ° C., 60 ° C., and 60 ° C., the same as the heater temperature setting in the mat gloss print mode, Printing was done.
The glossiness of the obtained printed matter was measured in the same manner as in Example 1. The results are shown in Table 4.
When the recording medium temperature during printing is measured, the recording medium temperature (= T _gloss ) in the gloss gloss print mode is 59 ° C., and the temperature of the heating means in the gloss gloss print mode during printing (= HT _gloss (° C.)) ) Is 60 ° C. When the temperature of the recording medium during printing is measured, the recording medium temperature (= T _matte ) in the matte gloss print mode is 59 ° C., and the temperature of the heating means (= HT _matte (° C.) in the matte gloss print mode during printing. )) Is 60 ° C.

(Comparative Example 3)
In the same printing apparatus as in Example 1, the magenta ink of Production Example 6 was filled, and the magenta ink coating film used in the gloss gloss print mode was heated at 45 ° C. before, during, and after printing. , 45 ° C, and 60 ° C, and the heating temperature of each heater of the magenta ink coating film used in the matte glossy print mode was set to 60 ° C, 60 ° C, and 60 ° C. Printed. All of the magenta print images are printed as solid images with an image resolution of 600 dpi × 600 dpi and a print rate of 100%.
The glossiness of the obtained printed matter was measured in the same manner as in Example 1. The results are shown in Table 4.

(Comparative Example 4)
In Comparative Example 2, inkjet printing was performed in the same manner as in Comparative Example 2, except that the heater temperature setting in the matte gloss print mode was set to 50 ° C, 50 ° C, and 60 ° C.
The glossiness of the obtained printed matter was measured in the same manner as in Example 1. The results are shown in Table 4.

* Comparative Example 3 describes the glossiness of the printed portion of magenta ink.

From the results of Tables 3 and 4, Examples 1 to 7 where T _matte > T _gloss (HT _matte > HT _gloss ) correspond to Comparative Examples 1 and 2 where T _matte = T _gloss (HT _matte = HT _gloss ). In comparison, it was found that the gloss was greatly reduced in the matte gloss print mode, and the gloss was greatly increased in the gloss gloss print mode.
Also, comparing Example 1 and Example 2, Example 1 in which the printing rate D _gloss -Printing rate D _matte is 60% is Example 2 in which Printing rate D _gloss -Printing rate D _matte is 10%. In comparison, a large change in gloss was obtained.
Further, comparing Examples 3, 4, and 6, the greater the resin content in the non-aqueous clear ink, the greater the change in gloss due to clear ink printing, and the greater the resin content in the non-aqueous clear ink. In Examples 4 and 6 where is less than 8% by mass, a large change in gloss was obtained as compared with Example 3 in which the resin content in the non-aqueous clear ink was less than 8% by mass.
In addition, comparing Example 4 and Example 5, Example 5 in which the content of the surfactant is 2% by mass or less is higher than Example 4 in which the content of the surfactant is more than 2% by mass. It was found that a large gloss change was obtained in the matte gloss print mode.

Aspects of the present invention are, for example, as follows.
<1> an ink storage unit that stores ink;
An ejection head that ejects ink to form a print layer,
Heating means for heating the substrate,
An inkjet printing apparatus having
The ink is a resin, and a non-aqueous clear ink containing an organic solvent,
The inkjet printing apparatus has a matte gloss print mode that is a print mode that gives matte gloss and a gloss glossy print mode that is a print mode that gives glossy gloss,
The heating unit _sets the temperature of the printing medium in a mat printing area to be printed in the mat glossy printing mode when the non-aqueous clear ink is applied to the printing medium to T _matte (° C.), and attaches the non-aqueous clear ink to the printing medium. _Assuming that the temperature of a printing medium in a gloss printing area to be printed in the gloss gloss printing mode at the time of performing the printing is T _gloss (° C.), heating is performed so as to satisfy the following expression: T _matte > T _gloss . Device.
<2> The inkjet printing apparatus according to <1>, wherein the heating unit performs heating so as to satisfy the following equation: T _matte −T _gloss ≧ 10 ° C.
<3> an ink storage unit that stores ink;
An ejection head that ejects ink to form a print layer,
Heating means for heating the substrate,
An inkjet printing apparatus having
The ink is a resin, and a non-aqueous clear ink containing an organic solvent,
The inkjet printing apparatus has a matte gloss print mode that is a print mode that gives matte gloss and a gloss glossy print mode that is a print mode that gives glossy gloss,
When the temperature of the heating unit in the matte gloss print mode is HT _matte (° C.) and the temperature of the heating unit in the gloss gloss print mode is HT _gloss (° C.), the following formula is satisfied: HT _matte > HT _gloss An ink jet printing apparatus characterized in that:
<4> _Assuming that the glossiness of the print material used in the matte gloss print mode is G _matte and the glossiness of the print material used in the gloss glossy print mode is G _gloss , the following formula, G _matte > G _gloss , is satisfied. An inkjet printing apparatus according to any one of <1> to <3>.
<5> The inkjet printing apparatus according to any one of <1> to <4>, wherein the content of the resin in the non-aqueous clear ink is 9% by mass or more.
<6> The inkjet printing apparatus according to any one of <1> to <5>, wherein the resin is a polyurethane resin.
<7> The inkjet printing apparatus according to any one of <1> to <6>, wherein the organic solvent is at least one selected from an alkylene glycol diether compound, an alkylene glycol monoether compound, and a lactone compound. is there.
<8> The inkjet printing apparatus according to any one of <1> to <7>, wherein the non-aqueous clear ink further contains a surfactant, and the content of the surfactant is 2% by mass or less. .
<9> The inkjet printing apparatus according to <8>, wherein the surfactant is at least one of a silicone surfactant and an acetylene glycol surfactant.
<10> a printing step of forming a print layer by ejecting ink on a printing substrate;
A heating step of heating the printed substrate,
An inkjet printing method comprising:
The ink is a resin, and a non-aqueous clear ink containing an organic solvent,
The inkjet printing method has a matte gloss print mode that is a print mode that provides a matte gloss and a gloss glossy print mode that is a print mode that provides a glossy gloss.
In the heating step, when the non-aqueous clear ink is applied to the printing medium, the temperature of the printing medium in a mat printing area to be printed in the mat glossy printing mode is T _matte (° C.), and the non-aqueous clear ink is applied to the printing medium. _Assuming that the temperature of a printing medium in a gloss printing area to be printed in the gloss gloss printing mode at the time of performing the printing is T _gloss (° C.), heating is performed so as to satisfy the following expression: T _matte > T _gloss . Is the way.
<11> The inkjet printing method according to <10>, wherein in the heating step, heating is performed so as to satisfy the following equation: T _matte −T _gloss ≧ 10 ° C.
<12> a printing step of forming a printing layer by discharging ink on a printing medium;
A heating step of heating the printed substrate by a heating means,
An inkjet printing method comprising:
The ink is a resin, and a non-aqueous clear ink containing an organic solvent,
The inkjet printing method has a matte gloss print mode that is a print mode that provides a matte gloss and a gloss glossy print mode that is a print mode that provides a glossy gloss.
When the temperature of the heating unit in the matte gloss print mode is HT _matte (° C.) and the temperature of the heating unit in the gloss gloss print mode is HT _gloss (° C.), the following formula is satisfied: HT _matte > HT _gloss An ink-jet printing method characterized by the following.
<13> Assuming that the glossiness of the printing material used in the matte glossy printing mode is G _matte and the glossiness of the printing material used in the gloss glossy printing mode is G _gloss , the following formula, G _matte > G _gloss , is satisfied. An inkjet printing method according to any one of <10> to <12>.
<14> The inkjet printing method according to any one of <10> to <13>, wherein the content of the resin in the non-aqueous clear ink is 9% by mass or more.
<15> The inkjet printing method according to any one of <10> to <14>, wherein the resin is a polyurethane resin.
<16> The inkjet printing method according to any one of <10> to <15>, wherein the organic solvent is at least one selected from an alkylene glycol diether compound, an alkylene glycol monoether compound, and a lactone compound. is there.
<17> The inkjet printing method according to any one of <10> to <16>, wherein the nonaqueous clear ink further contains a surfactant, and the content of the surfactant is 2% by mass or less. .
<18> The inkjet printing method according to <17>, wherein the surfactant is at least one of a silicone surfactant and an acetylene glycol surfactant.
<19> a printing step of forming a printing layer by discharging ink on a printing medium;
A heating step of heating the printed substrate,
A gloss control method for a print image including:
The ink is a resin, and a non-aqueous clear ink containing an organic solvent,
The method for controlling the glossiness of a print image includes a matte gloss print mode that is a print mode that provides matte gloss and a gloss gloss print mode that is a print mode that provides glossy gloss.
When printing in the matte gloss print mode, perform control to increase the heating temperature,
When printing in the gloss gloss print mode, a control method for lowering a heating temperature is performed, which is a gloss control method for a print image.

  The inkjet printing apparatus according to any one of <1> to <9>, the inkjet printing method according to any one of <10> to <18>, and gloss control of a print image according to <19>. According to the method, the conventional problems can be solved and the object of the present invention can be achieved.

400 Image forming apparatus 401 Exterior 401c Cover 404 Cartridge holder 410, 410k, 410c, 410m, 410y Main tank 411 Ink storage unit 413 Ink discharge port 414 Storage container case 420 Mechanical unit 434 Discharge head 436 Supply tube L Ink storage container

Japanese Patent Application Laid-Open No. 2015-3397

Claims (10)

An ink storage unit that stores ink,
An ejection head that ejects ink to form a print layer,
Heating means for heating the substrate,
An inkjet printing apparatus having
The ink is a resin, and a non-aqueous clear ink containing an organic solvent,
The inkjet printing apparatus has a matte gloss print mode that is a print mode that gives matte gloss and a gloss glossy print mode that is a print mode that gives glossy gloss,
The heating unit _sets the temperature of the printing medium in a mat printing area to be printed in the mat glossy printing mode when the non-aqueous clear ink is applied to the printing medium to T _matte (° C.), and attaches the non-aqueous clear ink to the printing medium. _Assuming that the temperature of a printing medium in a gloss printing area to be printed in the gloss gloss printing mode at the time of performing the printing is T _gloss (° C.), heating is performed so as to satisfy the following expression: T _matte > T _gloss . apparatus. The inkjet printing apparatus according to claim 1, wherein the heating unit performs heating so as to satisfy the following equation: T _matte −T _gloss ≧ 10 ° C. An ink storage unit that stores ink,
An ejection head that ejects ink to form a print layer,
Heating means for heating the substrate,
An inkjet printing apparatus having
The ink is a resin, and a non-aqueous clear ink containing an organic solvent,
The inkjet printing apparatus has a matte gloss print mode that is a print mode that gives matte gloss and a gloss glossy print mode that is a print mode that gives glossy gloss,
When the temperature of the heating unit in the matte gloss print mode is HT _matte (° C.) and the temperature of the heating unit in the gloss gloss print mode is HT _gloss (° C.), the following formula is satisfied: HT _matte > HT _gloss An ink-jet printing apparatus characterized by the above-mentioned. The glossiness of the printing material used in the matte glossy printing mode is _defined as G _matte, and the glossiness of the printing material used in the gloss glossy printing mode is _defined as G _gloss , wherein the following formula is satisfied: G _matte > G _gloss . 3. The inkjet printing apparatus according to any one of 3.   The inkjet printing apparatus according to any one of claims 1 to 4, wherein the content of the resin in the non-aqueous clear ink is 9% by mass or more.   The inkjet printing apparatus according to any one of claims 1 to 5, wherein the organic solvent is at least one selected from an alkylene glycol diether compound, an alkylene glycol monoether compound, and a lactone compound.   The inkjet printing apparatus according to any one of claims 1 to 6, wherein the non-aqueous clear ink further contains a surfactant, and the content of the surfactant is 2% by mass or less. A printing step of forming a printing layer by ejecting ink on a printing object,
A heating step of heating the printed substrate,
An inkjet printing method comprising:
The ink is a resin, and a non-aqueous clear ink containing an organic solvent,
The inkjet printing method has a matte gloss print mode that is a print mode that provides a matte gloss and a gloss glossy print mode that is a print mode that provides a glossy gloss.
In the heating step, when the non-aqueous clear ink is applied to the printing medium, the temperature of the printing medium in a mat printing area to be printed in the mat glossy printing mode is T _matte (° C.), and the non-aqueous clear ink is applied to the printing medium. _Assuming that the temperature of a printing medium in a gloss printing area to be printed in the gloss gloss printing mode at the time of performing the printing is T _gloss (° C.), heating is performed so as to satisfy the following expression: T _matte > T _gloss . Method. A printing step of forming a printing layer by ejecting ink on a printing object,
A heating step of heating the printed substrate by a heating means,
An inkjet printing method comprising:
The ink is a resin, and a non-aqueous clear ink containing an organic solvent,
The inkjet printing method has a matte gloss print mode that is a print mode that provides a matte gloss and a gloss glossy print mode that is a print mode that provides a glossy gloss.
When the temperature of the heating unit in the matte gloss print mode is HT _matte (° C.) and the temperature of the heating unit in the gloss gloss print mode is HT _gloss (° C.), the following formula is satisfied: HT _matte > HT _gloss An ink-jet printing method, characterized in that: A printing step of forming a printing layer by ejecting ink on a printing object,
A heating step of heating the printed substrate,
A gloss control method for a print image including:
The ink is a resin, and a non-aqueous clear ink containing an organic solvent,
The method for controlling the glossiness of a print image includes a matte gloss print mode that is a print mode that provides matte gloss and a gloss gloss print mode that is a print mode that provides glossy gloss.
When printing in the matte gloss print mode, perform control to increase the heating temperature,
When printing in the gloss gloss print mode, a control method for lowering the heating temperature is performed.