JPH08232176A - INKJET PRINTING METHOD AND PRINTED PRINTED BY THE METHOD - Google Patents

Abstract

(57) [Summary] [Purpose] When the ink is fixed, the bleeding state, sharpness, density and color development state of the printed material are stabilized, and the desired printed material can be repeatedly formed, and printing with excellent image quality is achieved. An inkjet printing method for forming a product is provided. In an inkjet printing method using an ink composed of a liquid component and a solid component and containing water and an organic solvent as the liquid components, after the ink is applied to a recording medium, the liquid component ratio (weight ratio) in the ink is An inkjet printing method, which comprises performing drying so that the solid component ratio is 9 or less, and then performing a fixing process. Also, the printed matter recorded by the method.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet printing method and a printed material recorded by the method.

[0002]

2. Description of the Related Art The mainstream of current printing is screen printing,
Roller printing. All of these methods require plates to be raised, are not suitable for high-mix low-volume production, and it is difficult to respond quickly to trends, so there has recently been a demand for plateless electronic printing systems. . In response to this demand, many printing methods using an inkjet recording method (hereinafter referred to as “inkjet printing method”) have been proposed, and expectations from various fields are increasing.

The ink jet recording apparatus records ink by ejecting ink from a recording head (recording means) onto a recording medium (recording material). This ink jet recording apparatus can easily make the recording head compact, can record a high-definition image at high speed, has a low running cost, and is a non-impact system, so there is little noise.
Moreover, there are advantages such as easy recording of a color image using multicolor inks.

In particular, a recording head of an ink jet recording apparatus for ejecting ink by utilizing heat energy is subjected to a semiconductor manufacturing process such as etching, steaming and sputtering, and an electrothermal converter, an electrode, and a film formed on a substrate. Since it is manufactured by forming a liquid passage wall, a top plate, and the like, and a high-density liquid passage / discharge port arrangement can be easily formed, further downsizing can be achieved.

However, when the above-mentioned ink jet recording apparatus is used for printing and color printing is performed by directly ejecting a plurality of color inks onto a cloth, when a plurality of dots are adjacent or overlapped with each other, the dots spread and a high-definition image is obtained. There was a drawback that you could not get. In particular, image deterioration due to color mixing and bleeding between dots is conspicuous at color mixing parts and edges.

In order to solve such a problem, the present applicant has already proposed that when the ink is applied to the cloth by the ink jet recording apparatus, the area coverage of the ink is less than 100% with respect to the area of the corresponding print pixel. are doing. According to this, bleeding can be appropriately suppressed, and image quality can be improved.

By the way, in textile printing, after the step of applying the ink to the cloth, a fixing process for fixing the dye to the cloth is required. In the fixing process, although the fixing mechanism is slightly different depending on the type of the dye or the cloth, steaming heat treatment or the like is generally performed to optimize the fixing process. However, the state of the printed matter before the fixing processing has a great influence on the image quality of the printed matter after the fixing processing, and even if the processing is performed under the same fixing conditions, the bleeding state, the sharpness, the density, and the coloring state of the dye remain. On the contrary, it was difficult to always obtain a desired printed material only by controlling the area coverage of the ink.

[0008] In order to solve such problems, the printed matter is fixed so that the cloth to which the ink adheres has a prescribed moisture content for the purpose of having a proper bleeding state, vividness, density and coloring state after the fixing treatment. It has been proposed to dry the fabric before the treatment (JP-A-6-270401).

[0009]

However, according to the above-mentioned regulation of the moisture content of the cloth, the moisture content of the cloth before recording differs depending on the fiber type or the cloth type to be recorded, and the ink amount on the cloth varies depending on the image data. However, the state of the ink on the cloth could not be sufficiently defined.

Factors that affect the state of the ink during fixing include the ease of movement of the dye on the cloth. The behavior of this dye is sensitive to the fixing processing conditions, Since it may be affected by liquid components other than water (organic solvent, etc.), it is not possible to always obtain a desired printed product only by specifying the moisture content of the cloth.

Therefore, an object of the present invention is to solve the above problems, to stabilize the bleeding state, sharpness, density and color development state of the image of the printed material at the time of fixing the ink, thereby making it possible to repeatedly form a desired printed material. Another object of the present invention is to provide an inkjet printing method for forming a printed material having excellent image quality. Another object of the present invention is to provide a printed material having excellent image quality by this method.

[0012]

Means for Solving the Problems The present inventors have completed the present invention as a result of various studies to solve the above problems. That is, the present invention is an ink-jet printing method comprising an ink comprising a liquid component and a solid component and containing at least water and an organic solvent as the liquid component, after applying the ink to a recording medium, the liquid component ratio in the ink (weight: The present invention relates to an inkjet printing method, which comprises performing drying so that the ratio) is 9 or less, preferably 6 or less, and more preferably 2 or less with respect to a solid component ratio of 1, and then performing a fixing treatment. It also relates to the printed matter recorded by this method.

The present invention will be described in detail below.

A general ink jet printing method is performed as follows. That is, pre-treatment of cloth, application of ink to cloth (hereinafter referred to as "ink application"), fixing processing of ink to cloth (hereinafter referred to as "ink fixing processing"), cloth on which ink is fixed. The printing is performed in the order of the washing of 1. and the drying of the cloth on which the ink is fixed.

The feature of the method of the present invention is that after application of the ink,
Before the fixing process, the drying (hereinafter referred to as “intermediate drying”) is performed so that the liquid component ratio in the ink on the cloth becomes a specific value or less with respect to the solid component ratio.

The intermediate drying is performed so that the liquid component ratio (weight ratio) in the ink on the cloth is 9 or less relative to the solid component ratio 1. It is preferably 6 or less, and more preferably 2 or less. The liquid component ratio in the ink is a composition ratio (weight ratio) in the ink of components that are liquid at room temperature, and is mainly a composition ratio of water or a water-soluble organic solvent. Here, the phrase “being liquid at room temperature” preferably means being a liquid in the range of 0 to 50 ° C. On the other hand, the solid component ratio is the composition ratio remaining after removing the liquid component from the ink, and is mainly the composition ratio of the dye.

Liquid component ratio (weight ratio) in the ink on the cloth
Is larger than 9 relative to the solid component ratio of 1, the dye in the ink is likely to move on the fiber, so that the dot area remarkably expands during fixing. In particular, in the color mixing portion, the movement on the fiber surface is more intense than the penetration into the fiber, so the color mixing between the dots is severe, the sharpness of the image is degraded, and the blurring is severe at the edges. In addition, since the degree of color mixing varies depending on the ink state of each area, the density of the printed material after the fixing process and the tint (coloring state) of the color mixing portion are likely to be greatly affected. Furthermore, the behavior of the dye in the ink is sensitive to the conditions of the fixing process, and thus it is difficult to obtain a printed product with the same image quality every time.

However, if the intermediate drying is carried out so that the liquid component ratio (weight ratio) in the ink on the cloth is 9 or less with respect to the solid component ratio 1, the above-mentioned inconvenient behavior of the dye in the ink. Moreover, it is unlikely to be affected by the conditions of the fixing process.
Therefore, since the bleeding state / vividness / density / coloring state of the image is stabilized in the fixing process, a desired printed matter can be repeatedly formed, and a printed matter with excellent image quality can be obtained.

The intermediate drying is preferably performed so that the liquid component ratio (weight ratio) in the ink on the cloth does not become smaller than 0.1 with respect to the solid component ratio 1. Preferably 0.5
Do not become smaller. Depending on the fabric, usually
This is because the texture of the cloth often deteriorates due to the drying treatment when the content is made smaller than 0.1.

The intermediate drying method is not particularly limited, and for example, a constant temperature dryer, an infrared heater, a hot air dryer, an iron or the like is used. The treatment conditions for the intermediate drying are not particularly limited because they vary depending on the amount and type of ink applied on the fabric, the specifications of the drying device, the presence or absence of air flow in the drying area, etc., but the drying temperature and the drying time are both. It is desirable to set the condition that does not deteriorate the texture. The preferred drying temperature is 25 to 200 ° C., although it depends on the drying time.

The liquid component ratio (weight ratio to the solid component) in the ink on the cloth after the intermediate drying was determined as follows. Two pieces of cloth of the same mass (W) that are accurately weighed are prepared. Recording is performed on only one side of the fabric, and the recorded fabric is accurately weighed (Wi). Then both the recorded and unrecorded fabrics are intermediate dried under the same conditions,
Again weigh each accurately (Wit, Wi). The liquid component ratio (L) in the ink on the cloth after the intermediate drying is determined from the following formulas (I), (II) and (III).

L = (Mlt / Mst) = ((Mt−Mst) / Mst) (I) Mt = Wit−Wt (II) Mst = r × M = r × (Wi−W) (III) After intermediate drying Weight of liquid component in ink on fabric: Mlt Weight of solid component in ink on fabric after intermediate drying: Mst Weight of ink on fabric after intermediate drying: Mt Weight of intermediate recorded fabric : Wit Weight of unrecorded fabric after intermediate drying: Wt Weight ratio of solid component in ink before intermediate drying: r Ink weight on fabric before intermediate drying: M (= Wi-W) of recorded fabric Weight before intermediate drying: Wi Weight before intermediate drying of unrecorded fabric: W The weight ratio (r) of solid components in the ink before intermediate drying is the composition ratio of the ink at the time of ink preparation (before recording).
Can be used directly. If the composition ratio at the time of preparation is unknown, the ink (before recording) is dried and dried at a predetermined temperature, and the ratio (% by weight) of the weight (constant value) obtained at this time to the total ink amount is defined as r. You may use.

The ink used in the ink jet printing method of the present invention is not particularly limited as long as it can dye the fibers of the base fabric (fabric), but the ink (dye ink) composed of an aqueous solvent containing various dyes. Is preferred. The dye in the ink is dissolved or dispersed in the aqueous solvent.

The dye used in the dye ink is not particularly limited as long as it is a dye capable of dyeing the fibers constituting the cloth, but an acid dye, a direct dye, a reactive dye, a basic dye, a disperse dye and the like are preferable.

These dyes may be used alone or in the ink.
Dyes containing at least one species and having different hues may be used in combination. The amount of dye used is 1 to the total amount of ink.
30% by weight is suitable, preferably 1.5 to 25% by weight, more preferably 2 to 20% by weight. If it is less than 1% by weight, the color density is insufficient, while if it exceeds 30% by weight, the ink ejection suitability becomes insufficient.

The aqueous solvent used in the ink is prepared from at least water and an organic solvent. Water is used as the main component, and the amount used is 30 to 90% by weight with respect to the total amount of ink.
Is suitable, preferably 40 to 90% by weight, more preferably 50 to 85% by weight.

On the other hand, the organic solvent is used in combination with water in order to improve the proper ejection of the ink, the releasability of the ink, and the anti-sticking property. Suitable organic solvents include thiodiglycol, diethylene glycol and the like. The amount of the organic solvent used is appropriately 3 to 60% by weight, preferably 5 to 50% by weight, based on the total amount of ink.

Further, a general organic solvent which is water-soluble or has an affinity for water may be used in combination with the above-mentioned organic solvent. You may use together these 1 type or in mixture of 2 or more types. The amount used is preferably used in combination so that the total amount with the organic solvent is within the range of the amount used of the organic solvent. As a general organic solvent, for example, methanol.
Monohydric alcohols such as ethanol / isopropyl alcohol, ketones or keto alcohols such as acetone / diacetone alcohol, ethers such as tetrahydrofuran / dioxane, triethylene glycol / tetraethylene glycol / dipropylene glycol / tripropylene glycol / polyethylene glycol Oxyethylene or oxypropylene addition polymers such as polypropylene glycol, alkylene glycols such as ethylene glycol, propylene glycol, trimethylene glycol, butylene glycol, and hexylene glycol where the alkylene group contains 2 to 6 carbon atoms, 1, 2,6-
Triols such as hexanetriol, glycerin, ethylene glycol monomethyl (or ethyl) ether
Diethylene glycol monomethyl (or ethyl) ether / triethylene glycol monomethyl (or ethyl)
Lower alkyl ethers of polyhydric alcohols such as ethers, lower dialkyl ethers of polyhydric alcohols such as triethylene glycol dimethyl (or ethyl) ether / tetraethylene glycol dimethyl (or ethyl) ether, sulfolane, N-methyl-2- Pyrrolidone,
1,3-dimethyl-2-imidazoline dinone and the like can be mentioned.

The main components of the ink used in the method of the present invention are as described above, but various dispersing agents, surfactants, viscosity modifiers, surface tension modifiers, optical brighteners, etc. are added as auxiliary agents. May be added if necessary. For example, viscosity adjusting agents such as polyvinyl alcohol, celluloses and water-soluble resins, various cationic or nonionic surfactants, surface tension adjusting agents such as diethanolamine and triethanolamine, pH adjusting agents with buffer solutions, antifungal agents, etc. Can be mentioned.

The above are all components of the ink used in the method of the present invention, and the solid component in the ink is 1% of the total amount of ink.
It is suitable that the content is -30 wt% or more. It is preferably 1.5 to 25% by weight, more preferably 2
-20% by weight.

The following properties are required for the cloth used in the method of the present invention. (A) To be able to develop ink to a sufficient density. (B) The dyeing rate of the ink is high. (C)
The ink dries quickly on the fabric. (D) The occurrence of irregular ink bleeding on the fabric is small.
(E) Excellent transportability in the device.

In order to satisfy these required performances, it is desirable to pretreat the cloth in advance.
For example, Japanese Patent Application Laid-Open No. 62-53492 discloses fabrics having an ink receiving layer, and Japanese Patent Publication No.
Japanese Patent No. 46589 proposes a fabric containing a reduction inhibitor and an alkaline substance.

Examples of preferable pretreatment for the method of the present invention include a treatment in which a cloth (pretreatment agent) selected from an alkaline substance, a water-soluble polymer, a water-soluble metal salt, urea and thiourea is contained in the cloth. be able to.

Examples of the alkaline substance include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide,
Amines such as monoethanolamine, diethanolamine and triethanolamine, alkali metal carbonates or bicarbonates such as sodium carbonate, potassium carbonate and sodium bicarbonate, organic acid metal salts such as calcium acetate and barium acetate, ammonia, ammonia compounds, etc. Is mentioned.
In addition, sodium trichloroacetate, which becomes an alkaline substance under steaming and dry heat, may be used. Particularly preferred alkaline substances are sodium carbonate and sodium bicarbonate used for dyeing reactive dyes.

Examples of the water-soluble polymer include natural polymers such as starch substances such as corn and wheat, cellulosic substances such as carboxymethyl cellulose, methyl cellulose and hydroxyethyl cellulose, sodium alginate, gum arabic and locust bean gum. Examples thereof include polysaccharides such as tragacanth gum, guar gum and tamarind seeds, protein substances such as gelatin and casein, tannin-based substances and lignin-based substances. As the synthetic polymer, for example, polyvinyl alcohol compound, polyethylene oxide compound, acrylic acid water-soluble polymer,
Examples thereof include maleic anhydride-based water-soluble polymers. Among these, polysaccharide polymers and cellulose polymers are preferable.

As the water-soluble metal salt, a compound which forms typical ionic crystals such as a halide of an alkali metal / alkaline earth metal and has a pH of 4 to 10 in an aqueous solvent is preferable. Examples of such compounds include, for _{example, NaCl · Na 2 SO 4 ·} KCl · CH 3 C
Alkali metal compounds such as OONa, CaCl ₂ · MgC
Examples thereof include alkaline earth metal compounds such as l ₂ . Of these, salts of Na, K or Ca are preferable.

The method of incorporating the above substances into the cloth in the pretreatment is not particularly limited, but a general method such as a dipping method, a pad method, a coating method and a spray method can be used.

The fixing process in the method of the present invention can be performed by a conventionally known method. For example, the steaming method
HT steaming method, thermofix method, etc., and when the cloth is not pre-treated with alkali, alkali pad steam method, alkali blotch steam method, alkali shock steam method, alkali cold fix method, etc. . When the ink is applied to the cloth, the dye in the ink is merely physically attached to the cloth, and the dye reacts with the fiber and is chemically fixed, so fixing (dyeing) is performed. There is a need.

In the method of the present invention, the washing of the cloth after the fixing treatment can be carried out by a conventionally known method. For example, it is washed with a neutral detergent at room temperature or a temperature slightly higher than room temperature. Such washing is performed in order to remove unreacted dye after the fixing treatment and substances used for pretreatment of the fabric.

Next, the ink jet recording apparatus will be described with reference to the drawings. FIG. 1 is a perspective view showing an example of a recording unit of an inkjet recording apparatus used in the method of the present invention.

The structure of the ink jet recording section is roughly classified into a frame (1), two guide rails (2), a recording head (3) (ink jet head), a carriage (4) for moving the recording head, and ink. It comprises a supply device (5), a carriage (6) for moving the ink supply device, a recording head recovery device (7) and an electric transmission system (8). The recording head (3) includes a plurality of nozzle arrays and a conversion device for converting an electrical signal into ink ejection energy, and the nozzle array is provided in accordance with an image signal sent from an image processing unit (not shown). It has a function to selectively eject ink from.

The recording head (3) is provided with an electrothermal converter or the like as the ejection means. The electrothermal converter gives thermal energy to the ink to cause the ink to change its state,
Ink is ejected by this state change.

The ink supply device (5) is for storing ink and supplying a required amount of ink to the recording head (3), and is connected to an ink tank, an ink pump and the like (not shown). The ink supply device (5) and the recording head (3) are connected by an ink supply tube (9), and the ink is automatically supplied to the recording head (3) by an amount ejected from the recording head (3) by a capillary action. To be done. Also,
In a recording head recovery operation described later, ink is forcibly supplied to the recording head (3) by an ink pump.

The recording head (3) and the ink supply device (5) are mounted on a carriage (4) and a carriage (6), respectively, and are reciprocated along a guide rail (2) by a driving device (not shown). Is configured.

The recording head recovery device (7) is provided to maintain the ink ejection stability of the recording head (3), and is a position facing the recording head at the home position (standby position) of the recording head. It is installed in. This recording head recovery device (7) can move forward and backward in the direction of arrow A, and specifically has the following function. The capping of the recording head is performed at the home position to prevent evaporation of ink from the nozzles of the recording head (3) when not in operation (capping operation). In addition, the ink pump is used to pressurize the ink flow path in the recording head to forcibly eject ink from the nozzle (pressurization recovery operation) and to forcibly suck and eject ink from the nozzle (suction recovery operation). The ink discharged at this time is collected. As a result, it is possible to discharge air bubbles, dust, and the like in the nozzle before the start of image recording.

The electric power transmission system includes a power source unit and a control unit for performing sequence control of the entire recording unit.

An image is formed on the cloth (10) as follows. The recording head (3) moves in the main scanning direction along the carriage (4) to perform recording for a predetermined length, and each time the cloth is conveyed, a sub-scanning direction (direction of arrow B) by a transport device (not shown). Is conveyed by a predetermined amount. These operations are repeated to form an image. In Fig. 1, the shaded area (1
1) indicates an area where recording is completed.

The recording head (3) will be further described below. As the recording head (3), there are a recording head for monochromatic recording, a plurality of recording heads for recording with different color inks for color recording, or a plurality of recording heads for recording with dark and light inks of the same color but different densities. Can be used. In addition, regardless of the configuration of the recording unit and the ink tank, such as a cartridge type in which the recording head and the ink tank are integrated, or a configuration in which the recording head and the ink tank are separated and connected by an ink supply tube. Can be applied.

Further, as the recording head, a recording head provided with an electromechanical transducer such as a piezo element can be applied, but an electrothermal transducer type recording head which ejects ink by utilizing thermal energy is used. preferable. According to this method, high density recording and high definition recording can be achieved.
For the typical configuration and principle of this system, see, for example, US Pat. No. 4,723,129 and US Pat. No. 4,740,796.
It is preferred to do so using the basic principles disclosed in the specification. This method can be applied to both so-called on-demand type and continuous type. Particularly in the case of the on-demand type, by applying a drive signal for inducing a rapid temperature rise in which the ink boils, to the electrothermal converter in the print head, corresponding to the print information,
Heat energy is generated in the electrothermal converter to cause the film boiling of the ink on the heat acting surface, and as a result, bubbles corresponding to this drive signal in a one-to-one correspondence are formed. Ink is ejected from the ejection port by the pressure when the bubble grows, and an ink droplet is formed. At this time, it is more preferable that the drive signal has a pulse shape. As a result, the bubbles are appropriately grown and contracted immediately, so that the ink can be ejected with excellent responsiveness. As this pulse-shaped drive signal, US Pat.
Those described in US Pat. Nos. 4,633,359 and 4,345,262 are suitable. Also, an invention relating to the rate of temperature rise of the heat acting surface (US Pat. No. 4,313,124)
No.), more excellent recording can be performed.

As the constitution of the recording head, in addition to the above-mentioned constitution of the combination of the ejection port, the liquid passage, and the electrothermal converter (the linear liquid passage or the right-angled liquid passage), the heat acting portion is bent in the passage. It may be arranged in a region (US Patent No. 45).
58333, U.S. Pat. No. 4,459,600). In addition, a structure in which a common slit is provided for a plurality of electrothermal converters to form a discharge portion (Japanese Patent Laid-Open No. 59-1236780) and an opening for absorbing a pressure wave of thermal energy corresponds to the discharge portion. The configuration (Japanese Patent Laid-Open No. 59-138461) may be adopted. Further, a full line type recording head having a length corresponding to the maximum width of the recording medium (recording material) may be used. Either a structure that satisfies the length by combining a plurality of recording heads or a structure as one recording head integrally formed may be adopted. Further, even in the case of the serial type as in the above example, an ink tank is provided integrally with the recording head fixed to the apparatus main body, a replaceable chip type recording head detachable from the apparatus main body, or the recording head itself. It is also possible to use a cartridge type recording head or the like.

It is preferable to add recovery means and other auxiliary auxiliary means to the recording head because recording can be further stabilized. Specific examples thereof include capping means, cleaning means, pressurizing / sucking means, preheating means (electrothermal converters, heating elements) for the recording head, and preliminary ejection means (what is called recording). Other ejection means) may be provided.

Regarding the type and number of recording heads to be mounted, for example, only one recording head is provided for a single color ink, or a plurality of recording heads are provided for a plurality of inks having different recording colors and densities. Individual recording heads may be provided. The recording mode of the recording device may be either a recording head integrally formed or a plurality of combinations,
The ink jet recording apparatus can be provided not only with a recording mode for only mainstream colors such as black, but also for a full-color recording mode with mixed colors of different colors and / or mixed colors.

[0053]

When the printing operation is limited, the image quality of the printed material is significantly affected by the state of the ink on the cloth before the fixing process. It is considered that this is due to the behavior of the dye in the ink, but the behavior of the dye is considered to be greatly affected not only by the amount of water in the cloth and ink but also by the amount of other liquid components. In other words, the amount of liquid component (including water and organic solvent) in the ink on the cloth is
It can be said that the behavior of the dye, which is most of the solid component, is influenced.

Therefore, if the cloth to which the ink is applied is dried (intermediate drying) before the fixing process to make the liquid component ratio in the ink on the cloth constant, the behavior of the dye also becomes constant, and as a result, the desired state is obtained. Image can be repeatedly formed.

Further, at the same time, when intermediate drying is performed so that the liquid component ratio in the ink on the cloth becomes smaller than a specific value with respect to the solid component ratio (almost the dye component ratio), the behavior state of the dye is Is preferable, and as a result, the above-mentioned stability of image quality is improved and a printed material having excellent image quality can be obtained.

[0056]

EXAMPLES The present invention will be further described below with reference to examples and comparative examples, but the present invention is not limited thereto.

Example 1 As the cloth, a woven cloth made of 100% nylon was used. Further, as a pretreatment, the cloth was dipped in an aqueous urea solution having a concentration of 15% by weight and dried. Accurately weigh this fabric,
Two sheets with the same mass were prepared.

As an ink jet recording method, an ink jet recording apparatus having an electrothermal converter as an ejection means, a recording head having 400 dpi, 256 nozzles, and a rectangular nozzle diameter of 22 × 33 μm was used, and an average ejection amount was 3
Ink was discharged onto the cloth with 0 pl / nozzle to record an image.

As the ink, the following composition was used. Dye 7 parts by weight Cyan: C.I. I. Acid Blue 90 (reactive dye) Magenta: C.I. I. Acid Red 266 (reactive dye) Yellow: C.I. I. Acid Yellow 110 (Reactive Dye) Black: C.I. I. Acid Black 26 (reactive dye) Thioglycol 5 parts by weight Diethylene glycol 10 parts by weight Ethyl alcohol 13 parts by weight Water 65 parts by weight Potassium chloride 0.004 parts by weight Sodium metasilicate 0.001 parts by weight Iron chloride 0.0005 parts by weight Chloride chloride Zinc 0.0003 parts by weight In this example, the above ink was used and 100% by weight was applied on the cloth.
A solid image of% density and an image of a geometric pattern having an average total amount of implantation of 200% were recorded.

Next, this recorded fabric was subjected to intermediate drying for 15 minutes in a dryer at 50 ° C. together with the unrecorded fabric.

After the intermediate drying, each fabric was accurately weighed. The liquid component ratio (ratio (weight ratio) to solid component ratio 1) (L) in the ink on the cloth after the intermediate drying was calculated according to the formula (I), the formula (II) and the formula (III). Met.

The fixing treatment was performed on the cloth (recorded) after the intermediate drying. The fixing process is performed at a temperature of 102 ° C.
The steam heat treatment was performed for 8 minutes under the condition that the steam amount was 100%.

Then, washing and drying were carried out to obtain the printed material of the present invention.

The density (OD value), vividness and bleeding state of the obtained printed material were evaluated. The results are shown in Table 1.

Example 2 The procedure of Example 1 was repeated except that the intermediate drying time was 60 minutes. Liquid component ratio in ink on cloth after intermediate drying (ratio to solid component ratio 1 (weight ratio)) (L)
Was calculated according to the formula (I), the formula (II) and the formula (III), the result was 2.

The density (OD value), sharpness, bleeding state, and color difference (MAXΔE) in the mixed portion of the same part of the image with respect to the print of Example 1 were evaluated. The results are shown in Table 1.

Example 3 The same procedure as in Example 1 was carried out except that the following ink was used and the intermediate drying treatment time was 18 minutes.

Dye 5 parts by weight Cyan: C.I. I. Acid Blue 90 (reactive dye) Magenta: C.I. I. Acid Red 266 (reactive dye) Yellow: C.I. I. Acid Yellow 110 (Reactive Dye) Black: C.I. I. Acid Black 26 (reactive dye) Thiodiglycol 10 parts by weight Diethylene glycol 5 parts by weight Ethyl alcohol 15 parts by weight Water 65 parts by weight Potassium chloride 0.004 parts by weight Sodium metasilicate 0.001 parts by weight Iron chloride 0.0005 parts by weight Chloride chloride Zinc 0.0003 parts by weight The liquid component ratio (ratio (weight ratio) to solid component ratio 1) (L) in the ink on the cloth after intermediate drying is expressed by the formula (I), the formula (II) and the formula (III). Therefore, it was 8 when calculated.

The density (OD value), vividness and bleeding state of the obtained printed material were evaluated. The results are shown in Table 1.

Example 4 The procedure of Example 2 was repeated, except that the intermediate drying time was 25 minutes. Liquid component ratio in ink on cloth after intermediate drying (ratio to solid component ratio 1 (weight ratio)) (L)
Was calculated according to the formula (I), the formula (II) and the formula (III), it was 5.

The density (OD value), sharpness, bleeding state, and color difference (MAXΔE) in the mixed portion of the same part of the image with respect to the print of Example 3 were evaluated. The results are shown in Table 1.

Comparative Example 1 The procedure of Example 1 was repeated, except that the intermediate drying time was 5 minutes. The liquid component ratio (ratio (weight ratio) to solid component ratio 1) (L) in the ink on the cloth after the intermediate drying was calculated according to the formulas (I), (II) and (III), and it was 10 Met.

The density (OD value), sharpness, bleeding state, and color difference (MAXΔE) in the mixed portion of the same portion of the image with respect to the printed material of Example 1 were evaluated. The results are shown in Table 1.

Comparative Example 2 The procedure of Example 2 was repeated, except that the intermediate drying treatment time was 4 minutes. The liquid component ratio (ratio (weight ratio) to solid component ratio 1) (L) in the ink on the cloth after the intermediate drying was calculated according to the formula (I), the formula (II) and the formula (III). Met.

The density (OD value), sharpness, bleeding state, and color difference (MAXΔE) in the mixed portion of the same part of the image with respect to the print of Example 3 were evaluated. The results are shown in Table 1.

[0076] Liquidity ratio: Liquid component ratio in ink on cloth after intermediate drying (ratio to solid component ratio 1 (weight ratio)) Evaporated liquid amount: Liquid amount in ink on fabric evaporated by intermediate drying (intermediate) Relative amount when the amount of liquid in the ink on the cloth before drying is 100) OD value: the highest OD value in the recording of 100% density (ink measured with magenta.) Sharpness: pattern The sharpness is visually determined. (○: good, Δ: somewhat good, ×: bad) Bleed state: visually irregular irregularity of the straight edge portion. (○: There is no turbulence. Δ: There is a little turbulence. ×: There is a lot of turbulence.) MAX ΔE: Color difference (measured by MINOLTA spectrophotometer CM-2022.)

[0077]

According to the method of the present invention, it is possible to obtain a printed material which has a good bleeding state and sharpness of an image and is excellent in image quality.

Further, when recording is repeated under the same conditions, not only the bleeding state and the sharpness of the image but also the change in the image density and the tint (coloring state) are small. That is, a high-quality image can be stably and repeatedly formed. Further, a desired printed material can be repeatedly obtained without setting the fixing processing conditions as strictly as in the past.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a recording unit of an inkjet recording apparatus used in a method of the present invention.

[Explanation of symbols]

 1 Frame Frame 2 Guide Rail 3 Recording Head 4 Carriage for Moving Recording Head 5 Ink Supply Device 6 Carriage for Moving Ink Supply Device 7 Recording Head Recovery Device 8 Electric Transmission System 9 Ink Supply Tube 10 Cloth 11 Recording Finished Area

Claims (7)

[Claims] 1. In an inkjet printing method using an ink composed of a liquid component and a solid component and containing at least water and an organic solvent as the liquid component, after the ink is applied to a recording medium, the ratio of the liquid component in the ink (weight: The inkjet printing method is characterized in that drying is carried out so that the ratio) is 9 or less with respect to the solid component ratio 1, and then a fixing treatment is carried out. 2. The inkjet printing method according to claim 1, wherein the drying is performed so that the liquid component ratio (weight ratio) is 6 or less relative to the solid component ratio 1. 3. The drying according to claim 1, wherein the liquid component ratio (weight ratio) is 2 or less with respect to the solid component ratio 1.
Inkjet printing method described. 4. The ink-jet printing method according to claim 1, 2 or 3, wherein the ink before being applied to the recording medium contains 5 to 50% by weight of the total amount of the organic solvent. 5. The ink jet textile printing method according to claim 1, wherein the solid component is contained in the ink before being applied to the recording medium in an amount of 2 to 20% by weight of the total ink amount. 6. The ink according to claim 1, which is a dye ink.
The inkjet printing method according to any one of 1. 7. A printed material recorded by the method according to any one of claims 1 to 6.