JP2015155579A - Production method of printed matter, printed matter and printing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a printed matter being excellent in light resistance of an image in printing by disperse dye and being capable of reducing staining of the white ground.

SOLUTION: A manufacturing method of a printed matter includes the steps of: preparing an ink composition containing water and disperse dye; ejecting droplets of the ink composition from a recording head and forming an image on a surface of a fabric base material; selectively irradiating plasma to a portion where the image is not formed on the surface of the fabric base material subsequent to formation of the image; and washing the fabric base material subsequent to irradiation of the plasma.

COPYRIGHT: (C)2015,JPO&INPIT

Description

  The present invention relates to a method for producing a printed product, a printed product, and a printing method.

  2. Description of the Related Art Conventionally, a printing technique for printing on a fabric substrate using a disperse dye is known. Disperse dyes are sparingly soluble in water and are used in the form of an emulsion dispersed in water with a dispersant. For this reason, the disperse dye is mainly dyed with hydrophobic synthetic fibers such as polyester, acetate, triacetate, nylon, and acrylic. A printing technique using such a disperse dye is disclosed in Patent Document 1, for example.

  In the disperse dye fixing process, (1) a pretreatment agent for fixing the disperse dye is applied to the fabric substrate to be dyed, and (2) the disperse dye is adhered to a predetermined part or the whole of the fabric substrate. (3) A high-temperature heat treatment such as steam is used for dyeing, and (4) the resulting printed product is then washed with a cleaning solution containing water and / or a reducing agent. It is. In this washing step, the disperse dye that could not be dyed on the fabric substrate can be removed by washing away with water or decomposing with a reducing agent.

Japanese Patent Laid-Open No. 06-116880

  However, when the fabric substrate dyed with the disperse dye is subjected to reduction cleaning as described above, white spot contamination often occurs. “Porreservation of white area” means that the disperse dye that has flowed out of the fabric base material into the cleaning liquid in the cleaning process of the printed material is unintentionally re-adsorbed to an area other than the printed pattern. This is a phenomenon in which dyeing occurs and is also referred to as white field failure.

  This white-spot contamination can be reduced by using a disperse dye that is easily decomposed by a reducing agent in the reduction washing process, but on the other hand, the light resistance of the image formed on the fabric substrate tends to be lowered. . On the other hand, the light resistance can be improved by using a disperse dye that is difficult to be decomposed by the reducing agent in the reduction cleaning step, but on the other hand, white spot contamination is likely to occur. Thus, there is a trade-off between the occurrence of white spot contamination and the light resistance of the image.

  In the above-mentioned Patent Document 1, after a treatment liquid containing at least one kind selected from a water repellent and a soft water repellent and a paste material is applied to the cloth in advance, the cloth is treated, and then the surface of the cloth is obtained. Discloses a textile printing method characterized in that dye ink is dyed by an ink jet method. However, with the technique disclosed in Patent Document 1, it is difficult to achieve both good light resistance of an image and reduction of white spot contamination.

  Some embodiments according to the present invention provide a method for producing a printed material that is excellent in light resistance of an image and can reduce white spot contamination in printing with a disperse dye by solving the above-described problems. is there.

SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following aspects or application examples.

[Application Example 1]
One aspect of the method for producing a printed material according to the present invention is:
Preparing an ink composition containing water and a disperse dye;
Ejecting droplets of the ink composition from a recording head to form an image on the surface of the fabric substrate;
After forming the image, selectively irradiating a portion of the surface of the fabric substrate where the image is not formed with plasma;
Cleaning the fabric substrate after irradiating the plasma;
It is characterized by including.

  According to the method for producing a printed material of Application Example 1, by selectively irradiating the portion where no image is formed on the surface of the fabric base material, that is, the portion that becomes a white field, water repellency is applied to the portion. Can be granted. This makes it difficult for the disperse dye to permeate into the portion that becomes white at the time of washing, so that even when a disperse dye that is difficult to be decomposed by the reducing agent is used, it is possible to reduce white-soil contamination. As a result, it is possible to produce a printed material that is excellent in light resistance of an image and can reduce white spot contamination.

[Application Example 2]
In the manufacturing method of the printed material of Application Example 1,
Between the step of forming the image and the step of washing the fabric substrate, the method may further include a step of performing a wet heat treatment on the fabric substrate on which the image is formed.

  According to the method for manufacturing a printed material of Application Example 2, it is possible to more strongly dye an image formed on the surface of the fabric base material.

[Application Example 3]
In the manufacturing method of the printed material of Application Example 1 or Application Example 2,
The plasma can be generated and irradiated under atmospheric pressure.

  According to the method for manufacturing a printed material of Application Example 3, since the plasma is irradiated under atmospheric pressure, the plasma processing unit can be incorporated in a printing machine that performs the image forming process, and droplets of the ink composition are recorded. A step of spraying from the head to form an image on the surface of the fabric base material and a step of selectively irradiating the portion of the surface of the fabric base material where the image is not formed with plasma are continuously performed. It becomes possible.

  In addition, plasma treatment under atmospheric pressure can be performed with a small apparatus. Therefore, according to the method for manufacturing a printed material of Application Example 3, the printed material can be manufactured with a small-scale printing machine.

[Application Example 4]
In the method for manufacturing a printed material according to any one of Application Examples 1 to 3,
The time from when the predetermined position of the fabric base material is irradiated with plasma until the fabric base material starts to be cleaned can be 240 seconds or less.

  According to the method for manufacturing a printed material of the application example 4, since it is possible to perform cleaning with a high water repellency effect obtained by plasma irradiation, it is possible to more effectively reduce white background contamination. Therefore, it is possible to produce a good printed product with reduced white-spot contamination.

[Application Example 5]
In the method for manufacturing a printed material according to any one of Application Examples 1 to 4,
The disperse dye may include an azo skeleton or an anthraquinone skeleton.

  A disperse dye containing an azo skeleton or an anthraquinone skeleton is hardly decomposed by light, and reductive decomposition by a reducing agent does not easily occur. Therefore, according to the method for manufacturing a printed material of Application Example 5, it is easy to achieve both good light resistance of an image and reduction of white background contamination.

[Application Example 6]
In the method for manufacturing a printed material according to any one of Application Examples 1 to 5,
The washing in the step of washing the fabric substrate may include one or both of washing with water and washing with an aqueous solution containing a reducing agent.

  The washing in the step of washing the fabric substrate includes one or both of washing with water and washing with water containing a reducing agent, so that the disperse dye that could not be dyed on the fabric substrate is effective. Therefore, it is possible to reduce the white spot contamination.

[Application Example 7]
One aspect of the printed material according to the present invention is:
It is manufactured by the method for manufacturing a printed material according to any one of Application Examples 1 to 6.

[Application Example 8]
In the printed material of Application Example 7,
When the OD value before the aging treatment is 100%, the OD value after the aging treatment can be 80% or more and 120% or less.

[Application Example 9]
In the printed material of Application Example 8,
The aging treatment may include a step of oxidizing with light, gas, and heat.

  The printed products of Application Example 7 to Application Example 9 are printed products manufactured by the method for manufacturing a printed product of any one of Application Examples 1 to 6, and therefore have excellent light resistance of the image, and Thus, a printed material with reduced white-field contamination is obtained. According to the printed products of Application Example 7 to Application Example 9, the OD value after the aging treatment with respect to the OD value before the aging treatment is ± 20% even when the indoor aging resistance is about 5 years. It is possible to be within the range. This OD value can be used as an index of light resistance. Therefore, the printed products of Application Examples 7 to 9 are particularly excellent in light resistance.

[Application Example 10]
One aspect of the textile printing method according to the present invention is:
A step of ejecting droplets of an ink composition containing water and a disperse dye from a recording head to form an image on the surface of the fabric substrate;
After forming the image, selectively irradiating a portion of the surface of the fabric substrate where the image is not formed with plasma;
Cleaning the fabric substrate after irradiating the plasma;
It is characterized by including.

According to the textile printing method of Application Example 10, the portion where the image is not formed on the surface of the fabric substrate, that is, the portion that becomes a white background is selectively irradiated with plasma to impart water repellency to the portion. be able to. This makes it difficult for the disperse dye to permeate into the portion that becomes white at the time of washing, and therefore, it is possible to reduce white-soil contamination even if a disperse dye that is not easily decomposed by the reducing agent is used.

The figure which shows typically the inkjet recording device which can be used for the manufacturing method of the printed material which concerns on this embodiment. The figure which shows typically the cross section of the plasma generation part of the inkjet recording device in FIG. The figure which shows typically a part in planar view of the inkjet recording device in FIG.

  Hereinafter, preferred embodiments of the present invention will be described. The embodiment described below describes an example of the present invention. In addition, the present invention is not limited to the following embodiments, and includes various modifications that are implemented within a range that does not change the gist of the present invention.

1. Method for Producing Printed Material A method for producing a printed material according to the present embodiment is a step of preparing an ink composition containing water and a disperse dye (hereinafter also referred to as “ink composition preparing step”). And a step of ejecting droplets of the ink composition from a recording head to form an image on the surface of the fabric substrate (hereinafter also referred to as “image forming step”), and after forming the image, the fabric. A step of selectively irradiating plasma on the surface of the substrate where the image is not formed (hereinafter also referred to as “plasma irradiation step”), and after irradiating the plasma, the fabric base And a step of cleaning the material (hereinafter also referred to as “cleaning step”).

  In the method for producing a printed material according to the present embodiment, from the viewpoint of more strongly dyeing the image formed on the surface of the fabric base material, between the step of forming the image and the step of cleaning the fabric base material. Preferably, the method further includes a step of performing a wet heat treatment on the fabric substrate on which the image is formed.

  The “printed product” in the present invention refers to a dyed product in which an image is printed on a fabric substrate.

  “Washing” in the present invention is a concept that includes either or both of washing a fabric substrate on which an image is formed with water and washing with an aqueous solution containing a reducing agent (so-called soaping).

  Hereinafter, a method for manufacturing a printed material according to the present embodiment will be described in the order of an apparatus configuration of an ink jet recording apparatus used for carrying out the method, a method for manufacturing a printed material, a printed material, and a printing method.

1.1. Device Configuration of Inkjet Recording Apparatus An example of an inkjet recording apparatus that can be used in the method for manufacturing a printed material according to the present embodiment will be described with reference to the drawings. The ink jet recording apparatus that can be used in the method for manufacturing a printed material according to the present embodiment is not limited to the following modes.

  FIG. 1 is a diagram schematically illustrating an ink jet recording apparatus that can be used in the method for manufacturing a printed material according to the present embodiment. The ink jet recording apparatus 1000 forms an image using a transport unit 10 for transporting a fabric, a plasma irradiation unit 20 for irradiating plasma, a processing agent applying unit 30 for applying a processing agent to the surface of the fabric, and an ink composition. Image forming means 40 for performing heat treatment, and wet heat treatment means 50 for performing wet heat treatment on the image.

  The inkjet recording apparatus 1000 includes a control unit (not shown) that controls the operation of the entire inkjet recording apparatus 1000. The control means is provided at an arbitrary position of the ink jet recording apparatus 1000, and controls the operation of each means based on information input from an input means such as a PC or a touch panel.

1.1.1. Conveying means The conveying means 10 can be constituted by, for example, a roller 11. The transport unit 10 may have a plurality of rollers 11. In the illustrated example, the conveying means 10 is provided on the upstream side of the treatment agent applying means 30 in the direction in which the fabric base material 1 is conveyed (indicated by an arrow in the figure, hereinafter also referred to as “fabric conveying direction”). However, the present invention is not limited to this, and as long as the fabric substrate 1 can be transported, the position and the number of the substrates to be provided are arbitrary.

  Further, the transport unit 10 may include various platens. In the example of FIG. 1, the conveying means 10 includes a roller 11 and a platen 12 that supports the fabric substrate 1 from the surface opposite to the surface on which the image is printed on the fabric substrate 1.

1.1.2. Treatment Agent Application Unit The treatment agent application unit 30 is a unit that applies the treatment agent to the surface of the fabric substrate 1. By applying the treatment agent, the prevention of bleeding and the penetration of the ink into the fabric substrate are promoted, and a good image can be formed on the surface of the fabric substrate.

  The processing agent application unit 30 is not necessarily included in the configuration of the printing press, and may be provided as necessary. In the example of FIG. 1, the processing agent application unit 30 is provided on the upstream side of the image formation unit 40 in the fabric conveyance direction from the viewpoint of providing a function necessary for the image formation unit 40 to the fabric base material. It may be provided downstream of the image forming unit 40 and upstream of the wet heat treatment unit 50. The treatment agent applying means is not necessarily performed by a printing machine, and may be separately performed by a pad method, a coating method, a spray method, or the like so that the treatment agent is included in the fabric base material.

  As the treatment agent, a treatment agent containing water-soluble polymers (glue agent), a cationic substance, a water repellent and the like can be used for the purpose of preventing bleeding and promoting the penetration of ink into the fabric substrate. . Moreover, a surface tension adjusting agent, a water-soluble organic solvent, etc. can also be added for the purpose of permeating the surface opposite to the surface on which the ink adheres.

  Examples of the cationic substance include water-soluble metal salts and polycation compounds. As the water-soluble metal salt, inorganic salts or organic acid salts of alkali metals or alkaline earth metals such as potassium chloride and calcium chloride can be used. As the polycation compound, polymers or oligomers of various quaternary ammonium salts, polyamine salts, and the like can be used.

  Natural water-soluble polymers that are one of water-soluble polymers include starches such as corn and wheat, cellulose derivatives such as carboxymethylcellulose, methylcellulose, and hydroxyethylcellulose; sodium alginate, guar gum, tamarind gum, locust bean gum, Examples include polysaccharides such as gum arabic; protein substances such as gelatin, casein, and keratin. Examples of the synthetic water-soluble polymer include polyvinyl alcohol, polyvinyl pyrrolidone, acrylic acid polymer and the like.

Examples of the surface tension adjusting agent include an anionic surfactant, an amphoteric surfactant, a cationic surfactant, and a nonionic surfactant. Examples of the water repellent include silicone-based, fluorine-based and wax-based agents.

  Examples of the method for applying the treatment agent to the surface of the fabric substrate include a method of immersing the fabric substrate in the treatment agent, a method of applying the treatment agent with a roll coater, and a method of spraying the treatment agent (for example, inkjet Any method can be used. In the example of FIG. 1, a method of applying the treatment agent with a roll coater is shown.

The application amount of the treatment agent is preferably 5 mg / inch ² or more and 200 mg / inch ² or less, more preferably 10 mg / inch ² or more and 100 mg / inch ² or less. The effect which improves the dyeing | staining property of a disperse dye is exhibited more because the provision amount of a processing agent exists in the said range. The amount of treatment agent applied is the sum of the weight of the treatment agent applied to the fabric substrate (weight before drying) divided by the area of the region to which the treatment agent was applied.

  The ink jet recording apparatus 1000 may include a processing agent drying means (not shown) for drying the processing agent applied to the fabric base material. In the example of FIG. 1, the treatment agent drying means is preferably provided immediately after the treatment agent application means 30. Examples of such drying means include means for applying heat to the fabric substrate, means for blowing air on the fabric substrate, and means for combining them. Specifically, forced air heating, radiation heating, conductive heating, high frequency drying, microwave drying, and the like are preferably used.

1.1.3. Image Forming Unit The image forming unit 40 is a unit that forms an image by attaching droplets of the ink composition to the surface of the fabric substrate 1. The image forming unit 40 includes an inkjet recording head (recording head) 41 including a nozzle that ejects (discharges) the ink composition. As shown in FIG. 1, the image forming unit 40 is preferably provided on the downstream side of the processing agent applying unit 30.

  Examples of the method for ejecting the ink composition from the nozzles of the recording head 41 include the following. That is, a strong electric field is applied between the nozzle and the accelerating electrode placed in front of the nozzle, droplet-like ink is continuously ejected from the nozzle, and the recording information is recorded while the ink droplets fly between the deflection electrodes. A method of recording by applying a signal to the deflection electrode or a method of discharging ink droplets in response to the recording information signal without deflecting (electrostatic suction method), applying pressure to the ink with a small pump, and vibrating the nozzle with quartz A method of forcibly ejecting ink droplets by mechanical vibration with a child, etc., a method for simultaneously applying pressure and recording information signals to ink with a piezoelectric element, and ejecting and recording ink droplets (piezo method) ), A method in which ink is heated and foamed with a microelectrode in accordance with a recording information signal, and ink droplets are ejected and recorded (thermal jet method).

  The recording head 41 is a so-called serial type recording head in the example of FIG. The serial type recording head performs printing by performing scanning (pass) for ejecting the ink composition a plurality of times while moving the recording head relative to the fabric substrate 1. In the example of FIG. 3, a serial type recording head is illustrated, but the present invention is not limited to this, and a so-called line type recording head may be used. An ink jet recording apparatus equipped with a line type recording head performs printing by performing a scanning (pass) of ejecting an ink composition once while moving the recording head relative to a fabric substrate. is there. As a specific example of the line-type recording head, there is a recording head that is formed wider than the width of the fabric, and the recording head ejects droplets onto the fabric without moving.

1.1.4. Plasma Irradiation Unit The plasma irradiation unit 20 includes a plasma generation unit 21 having a mechanism for generating plasma, and a gas storage unit 29 that stores a gas to be supplied to the plasma generation unit 21. In the example of FIG. 1, the plasma irradiation unit 20 is provided on the downstream side of the image forming unit 40 in the fabric conveyance direction (the arrow direction in FIG. 1). In FIG. 1, in order to make it easy to understand that after the image is formed on the surface of the fabric base material, the region where the image on the surface of the fabric base material is not formed is irradiated with plasma, the image forming unit 40 and the plasma irradiation unit However, the plasma irradiation means 20 is actually mounted on the recording head 41 as shown in FIG.

  FIG. 3 is a diagram schematically showing a part of the inkjet recording apparatus 1000 of FIG. 1 in plan view. In the example of FIG. 3, the plasma irradiation means 20 is realized by mounting four plasma generation units 21 on the recording head 41. By mounting the plasma generation unit on the serial type recording head 41 in this manner, a process for forming an image on the surface of the fabric base material and a portion on the surface of the fabric base material where the image is not formed are selected. The step of irradiating plasma can be performed continuously. As a result, productivity is improved and the printing press is reduced in size, so that in-line operation is facilitated.

  In addition, the plasma irradiation unit 20 is configured not to mount the plasma generation unit 21 on the recording head 41 used in the image forming unit 40 but to prepare a serial type carriage separately and mount the plasma generation unit 21 on the carriage. It is good. Moreover, the plasma irradiation means 20 is good also as a linear shape extended in the width direction (direction which cross | intersects the cloth conveyance direction in the surface of a fabric) of the fabric base material 1. FIG. When the plasma irradiation means 20 has a linear shape, the plasma irradiation nozzle 25 is arranged along the width direction of the fabric base 1 so that an arbitrary region can be selectively irradiated from the entire width direction of the fabric base 1. A plurality may be arranged. Further, from the viewpoint of increasing the plasma irradiation amount, a plurality of plasma irradiation means 20 may be provided along the fabric conveyance direction, or a plurality of plasma irradiation nozzles 25 may be provided along the fabric conveyance direction.

  FIG. 2 is a diagram schematically showing a cross section of the plasma generating unit 21. The plasma generation unit 21 includes a gas supply chamber 22 connected to the gas storage unit 29, an electrode pair 23 provided to face at least a part of the gas supply chamber 22, a power supply 24, and a plasma irradiation nozzle 25. And an exhaust pipe 26.

  The gas supply chamber 22 is connected to the gas storage unit 29 by a gas supply pipe (not shown), so that the gas stored in the gas storage unit 29 can flow in. An electrode pair 23 is provided at an arbitrary position in the gas supply chamber 22. The electrode pair 23 includes an electrode 23a and an electrode 23b installed so as to face each other. A power source 24 is connected to the electrodes 23a and 23b so that a voltage can be applied.

  The plasma irradiation nozzle 25 is provided in the gas supply chamber 22 at a position different from a gas supply pipe (not shown). The plasma irradiation nozzle 25 is provided with a nozzle hole for irradiating plasma generated by passing between the electrode 23a and the electrode 23b. The plasma irradiation nozzle 25 is provided at a position facing the fabric substrate 1.

  The exhaust pipe 26 is installed in order to optimize the plasma irradiation range radiated from the plasma irradiation nozzle 25 and process the desired range locally by performing plasma irradiation while sucking and exhausting excess gas. . The installation position of the exhaust pipe 26 is not particularly limited. For example, in the example of FIG. 2, the exhaust pipe 26 includes two exhaust pipes 26 a and 26 b and is provided along the gas supply chamber 22.

When a voltage is applied to the electrode 23a and the electrode 23b by the power supply 24, a discharge is generated between the electrode 23a and the electrode 23b ("discharge portion D" in FIG. 2). In such a state where discharge is generated, gas is supplied to the gas supply chamber 22 and gas is passed between the electrode 23a and the electrode 23b, thereby generating gas plasma (that is, at least one of the gases). Part becomes plasma). The plasma generated in this way is sent to the plasma irradiation nozzle 25 and irradiated from the plasma irradiation nozzle 25 toward the surface of the fabric substrate 1. That is, the plasma generated by the plasma generation unit 21 is irradiated on the surface of the fabric base 1 in a state where the discharge portion D does not contact the fabric base 1. In other words, since the fabric base material 1 does not pass through the discharge part D, it does not directly contact the discharge part D. Such a plasma generation mechanism is called a remote jet system. On the other hand, in the plasma generation mechanism, the method in which the fabric base 1 is in contact with the discharge portion D is called a direct method.

  The plasma generation mechanism used in the present invention may be either a remote jet type or a direct type, but by using a remote jet type plasma irradiation means that does not bring the fabric base into contact with the discharge portion, the surface of the fabric base is used. Can be finely roughened and fine irregularities can be periodically formed. Thereby, what is called a lotus effect is provided to the surface of a fabric base material, and the water repellency of the surface of a fabric base material can be raised more.

  Although the surface of the fabric substrate can be roughened even by the direct method, it is difficult to roughen the surface finely compared to the remote jet method, and sufficient water repellency may not be obtained. In the direct method, since the fabric base material is in direct contact with the discharge portion, discharge damage is likely to occur on the surface of the fabric base material. From the above, it is preferable to use a remote jet type plasma irradiation means.

  The plasma irradiation means 20 may be provided with a mechanism for generating and irradiating plasma under vacuum, or may be provided with a mechanism for generating and irradiating plasma under atmospheric pressure. Those having a mechanism for generating and irradiating plasma under atmospheric pressure are preferable. When plasma is generated under atmospheric pressure, it is not necessary to provide a depressurization mechanism in the plasma irradiation means, and the apparatus can be miniaturized. Therefore, the plasma irradiation process described later can be performed in-line (that is, There is an advantage that processes such as a plasma irradiation process and an image forming process can be performed continuously. Here, the pressure when generating plasma refers to the pressure in the gas supply chamber 22 when generating plasma.

  The amount of electric power for generating plasma is not particularly limited as long as plasma can be generated from the supplied gas, and can be, for example, 100 Wh or more and 200 Wh or less.

  The frequency of the power supply 24 when generating the plasma is not particularly limited as long as the plasma can be generated from the supplied gas. For example, the frequency is 50 kHz or more.

One type of gas may be supplied to the gas supply chamber 22 or a mixed gas obtained by mixing two or more types of gases may be supplied. Such a gas species is not particularly limited as long as it is a gas species that can finely roughen the surface of the fabric substrate 1 (providing a lotus effect). For example, nitrogen (N ₂ ), ammonia (NH ₃ ), carbon tetrafluoride (CF ₄ ), argon (Ar), helium (He), neon (Ne), and a mixed gas thereof can be given. Among these gas types, a mixed gas containing fluorine is preferable in that it can sufficiently roughen the surface of the fabric base material and can provide an excellent water repellent effect. The flow rate of the gas supplied to the gas supply chamber 22 can be set as appropriate according to the capacity of the gas supply chamber 22, the gas type, the type of fabric substrate, the printing speed, etc., and is not particularly limited. Absent.

1.1.5. Wet heat treatment means 50
The wet heat treatment means 50 is a means for wet heat treatment of the image formed on the surface of the fabric substrate 1. Thereby, the dispersibility of the disperse dye in the surface of the fabric base material 1 improves further. The wet heat treatment means 50 is not necessarily included in the configuration of the printing press, and may be provided as necessary. The wet heat treatment means 50 may be provided on the downstream side of the image forming means 40 and the plasma irradiation means 20 in the fabric conveying direction. As the wet heat treatment, a conventionally known method can be used, and examples thereof include an HT method (high temperature steaming method) and an HP method (high pressure steaming method).

1.1.6. Other Means The ink jet recording apparatus 1000 used in the present embodiment may further include a cleaning means (not shown) for cleaning the fabric base material. The washing means is means for washing away undyed disperse dyes or the like using, for example, water or an aqueous solution containing a reducing agent. Known means can be used as the washing means. The cleaning means can be provided, for example, on the downstream side of the wet heat treatment means 50 in the fabric conveyance direction.

  The ink jet recording apparatus 1000 used in the present embodiment may further include a cloth drying unit (not shown) for drying the cloth. As the fabric drying means, the same drying means as mentioned in the above-mentioned treating agent drying means can be used. The cloth drying means can be provided, for example, on the downstream side of the wet heat means (on the downstream side of the washing means when the cloth is washed by the washing means).

1.2. Manufacturing Process Next, the manufacturing method of the printed material according to the present embodiment will be described in detail for each process.

1.2.1. Ink composition preparation step The ink composition preparation step is a step of preparing an ink composition containing a disperse dye and water. The ink composition is an ink for ink jet textile printing used in an image forming process described later.

  The components contained in the ink composition prepared in the ink composition preparation step, the method for preparing the ink composition, and the physical properties of the ink composition will be described below.

1.2.1.1. Components of ink composition <Disperse dye>
The disperse dye contained in the ink composition is not particularly limited, but is preferably a disperse dye that is hardly soluble in water and contains an azo skeleton or an anthraquinone skeleton. A disperse dye containing an azo skeleton or an anthraquinone skeleton is hardly decomposed by light, and reductive decomposition by a reducing agent does not easily occur. Therefore, these disperse dyes are liable to cause white spot contamination in the washing step, but according to the method for producing a printed material according to this embodiment, the white spot is imparted with water repellency. Can be reduced.

Specific examples of the disperse dye include C.I. I. Disperse Yellow 3, 4, 5, 7, 9, 13, 24, 30, 33, 34, 42, 44, 49, 50, 51, 54, 56, 58, 60, 63, 64, 66, 68, 71, 74, 76, 79, 82, 83, 85, 86, 88, 90, 91, 93, 98, 99, 100, 104, 114, 116, 118, 119, 122, 124, 126, 135, 140, 141, 149, 160, 162, 163, 164, 165, 179, 180, 182, 183, 186, 192, 198, 199, 202, 204, 210, 211, 215, 216, 218, 224, etc .; I. Disperse Orange 1, 3, 5, 7, 11, 13, 17, 20, 21, 25, 29, 30, 31, 32, 33, 37, 38, 42, 43, 44, 45, 47, 48, 49, 50, 53, 54, 55, 56, 57, 58, 59, 61, 66, 71, 73, 76, 78, 80, 89, 90, 91, 93, 96, 97, 119, 127, 130, 139, 142 etc., C.I. I. Disperse Red 1, 4, 5, 7, 11,
12, 13, 15, 17, 27, 43, 44, 50, 52, 53, 54, 55, 56, 58, 59, 60, 65, 72, 73, 74, 75, 76, 78, 81, 82, 86, 88, 90, 91, 92, 93, 96, 103, 105, 106, 107, 108, 110, 111, 113, 117, 118, 121, 122, 126, 127, 128, 131, 132, 134, 135, 137, 143, 145, 146, 151, 152, 153, 154, 157, 159, 164, 167, 169, 177, 179, 181, 183, 184, 185, 188, 189, 190, 191, 192, 200, 201, 202, 203, 205, 206, 207, 210, 221, 224, 225, 227, 229, 239, 240, 257, 2 8,277,278,279,281,288,289,298,302,303,310,311,312,320,324,328 like; C. I. Disperse Violet 1, 4, 8, 23, 26, 27, 28, 31, 33, 35, 36, 38, 40, 43, 46, 48, 50, 51, 52, 56, 57, 59, 61, 63, 69, 77, etc., C.I. I. Disperse Green 9 etc .; C.I. I. Disperse Brown 1, 2, 4, 9, 13, 19 etc., C.I. I. Disperse Blue 3, 7, 9, 14, 16, 19, 20, 26, 27, 35, 43, 44, 54, 55, 56, 58, 60, 62, 64, 71, 72, 73, 75, 79, 81, 82, 83, 87, 91, 93, 94, 95, 96, 102, 106, 108, 112, 113, 115, 118, 120, 122, 125, 128, 130, 139, 141, 142, 143, 146, 148, 149, 153, 154, 158, 165, 167, 171, 173, 174, 176, 181, 183, 185, 186, 187, 189, 197, 198, 200, 201, 205, 207, 211, 214, 224, 225, 257, 259, 267, 268, 270, 284, 285, 287, 288, 291, 293, 295, 97,301,315,330,333, etc.; C. I. Disperse
Black 1, 3, 10, 24 etc. are mentioned. These disperse dyes may be used alone or in combination of two or more.

  The content of the disperse dye in the ink composition is preferably 0.1% by mass or more and 10% by mass or less, more preferably 0.5% by mass or more with respect to the total mass (100% by mass) of the ink composition. It is 8 mass% or less, Most preferably, it is 1 mass% or more and 7 mass% or less.

<Water>
Water contained in the ink composition is a liquid medium that is a main component of the ink composition. The water is preferably water from which ionic impurities such as pure water such as ion exchange water, ultrafiltration water, reverse osmosis water, distilled water or ultrapure water are removed as much as possible. The water content can be, for example, 50% by mass or more with respect to the total mass (100% by mass) of the ink composition.

  The ink composition may contain a dispersant, a water-soluble organic solvent, a surfactant, ureas, sugars, a pH adjuster, a chelating agent, a preservative, a fungicide, a rust inhibitor, and the like.

<Dispersant>
The dispersant for dispersing the disperse dye is not particularly limited, and examples thereof include nonionic and anionic dispersants. Examples of the anionic dispersant include higher fatty acid salts, polyoxyethylene alkyl ether sulfates, aromatic sulfonates, lignin sulfonates, aromatic sulfonates, and formalin condensates of lignin sulfonates. Examples of the aromatic sulfonate include alkyl phenyl sulfonate, alkyl naphthalene sulfonate, and alkyl phenyl ether sulfonate. Formalin condensates of aromatic sulfonates include formalin condensates of naphthalene sulfonate, special aromatic sulfonate formalin condensates (formalin condensation of sodium alkylnaphthalene sulfonate such as butyl naphthalene and sodium naphthalene sulfonate. Products, a formalin condensate of sodium cresol sulfonate and sodium 2-naphthol-6-sulfonate, a formalin condensate of sodium cresol sulfonate, a formalin condensate of sodium creosote oil sulfonate, and the like. An agent can be used 1 type or in combination of 2 or more types.

  In addition to the above nonionic and anionic dispersants, so-called polymer dispersants can be used, for example, styrene and its derivatives, vinyl naphthalene and its derivatives, aliphatic alcohols of α, β-unsaturated carboxylic acids. At least two or more selected from esters, etc., acrylic acid and derivatives thereof, maleic acid and derivatives thereof, itaconic acid and derivatives thereof, fumaric acid and derivatives thereof, vinyl acetate, vinyl alcohol, vinylpyrrolidone, acrylamide, and derivatives thereof Examples thereof include a block copolymer, a random copolymer, a graft copolymer, and salts thereof composed of monomers (at least one of which is a hydrophilic monomer). These resins are preferably alkali-soluble resins that are soluble in an aqueous solution in which a base is dissolved.

  Although the content rate of the dispersing agent contained in the said ink composition is not specifically limited, It is preferable that it is 5-200 mass parts with respect to 100 mass parts of disperse dye content, and it is 10-100 mass parts. More preferred.

  A method for dispersing the disperse dye is not particularly limited, and the disperse dye can be dispersed by a method such as a ball mill, a sand mill, or a high-pressure homogenizer. The range of the average particle diameter of the disperse dye contained in the ink composition is preferably 0.05 μm or more and 1.0 μm or less from the viewpoints of dispersion stability and prevention of clogging of the ink supply system and the ink discharge part. More preferably, it is 0.07 μm or more and 0.5 μm or less.

<Water-soluble organic solvent>
The ink composition preferably contains a water-soluble organic solvent having a solubility in 100 g of water at 25 ° C. of 1 g / 100 g or more. When the ink composition contains a water-soluble organic solvent, it is possible to impart functions such as improving the wettability of the ink composition with respect to the fabric substrate and increasing the moisture retention of the nozzle.

  Examples of the water-soluble organic solvent include alcohols such as methanol, ethanol and isopropyl alcohol; ketones or keto alcohols such as acetone and diacetone alcohol; ethers such as tetrahydrofuran and dioxane; ethylene glycol, diethylene glycol, triethylene glycol, Glycols such as polyethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, propanediol, butanediol, pentanediol, hexylene glycol; ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol mono Butyl ether, triethylene glycol Methyl ether, lower alkyl ethers of glycols such as triethylene glycol monobutyl ether; diethanol amines having a hydroxyl group such as triethanolamine; glycerol, 2-pyrrolidone, N- methylpyrrolidone and the like. Among these, glycerin, diethylene glycol, triethylene glycol, ethylene glycol, ethylene glycol monomethyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, and triethylene glycol monobutyl ether can be suitably used. These water-soluble organic solvents can be used alone or in combination of two or more.

  The content of the water-soluble organic solvent in the ink composition is preferably 5 to 50% by mass from the viewpoint of preventing nozzle clogging and bleeding.

<Surfactant>
The surfactant has a function of reducing the surface tension of the ink composition and adjusting the wettability with the fabric. Among the surfactants, acetylene glycol surfactants, silicone surfactants, and fluorine surfactants can be preferably used.

  Although it does not specifically limit as an acetylene glycol type surfactant, For example, Surfinol 104, 104E, 104H, 104A, 104BC, 104DPM, 104PA, 104PG-50, 104S, 420, 440, 465, 485, SE, SE-F 504, 61, DF37, CT111, CT121, CT131, CT136, TG, GA, DF110D (all are trade names, manufactured by Air Products and Chemicals. Inc.), Olphin B, Y, P, A, STG, SPC, E1004, E1010, PD-001, PD-002W, PD-003, PD-004, PD-005, EXP. 4001, EXP. 4036, EXP. 4051, AF-103, AF-104, AK-02, SK-14, AE-3 (all trade names, manufactured by Nissin Chemical Industry), acetylenol E00, E00P, E40, E100 (all trade names, river Ken Fine Chemical Co., Ltd.).

  Although it does not specifically limit as a silicone type surfactant, A polysiloxane type compound is mentioned preferably. Although it does not specifically limit as the said polysiloxane type compound, For example, polyether modified organosiloxane is mentioned. Examples of commercially available products of the polyether-modified organosiloxane include BYK-306, BYK-307, BYK-333, BYK-341, BYK-345, BYK-346, BYK-348 (above trade names, manufactured by BYK), KF-351A, KF-352A, KF-353, KF-354L, KF-355A, KF-615A, KF-945, KF-640, KF-642, KF-643, KF-6020, X-22-4515, Examples thereof include KF-6011, KF-6012, KF-6015, and KF-6017 (trade names, manufactured by Shin-Etsu Chemical Co., Ltd.).

  As the fluorine-based surfactant, a fluorine-modified polymer is preferably used, and specific examples thereof include BYK-340 (manufactured by BYK Japan).

  When the surfactant is contained, the content thereof can be 0.05% by mass or more and 1.5% by mass or less with respect to the total mass of the ink composition.

<Ureas>
Urea functions as a moisturizing agent for ink or functions as a dyeing assistant for improving dyeing properties. Specific examples of ureas include urea, ethylene urea, tetramethyl urea, thiourea, 1,3-dimethyl-2-imidazolidinone and the like. When urea is contained, the content thereof can be 1% by mass or more and 10% by mass or less with respect to the total mass of the ink composition.

<Sugar>
The saccharide functions as a humectant that suppresses solidification and drying of the ink. Specific examples of the saccharide include glucose, mannose, fructose, ribose, xylose, arabinose, galactose, aldonic acid, glucitol (sorbitol), maltose, cellobiose, lactose, sucrose, trehalose, and maltotriose.

<PH adjuster>
Examples of the pH adjuster include potassium dihydrogen phosphate, disodium hydrogen phosphate, sodium hydroxide, lithium hydroxide, potassium hydroxide, ammonia, diethanolamine, triethanolamine, triisopropanolamine, potassium carbonate, sodium carbonate, Sodium hydrogen carbonate, trishydroxymethylaminomethane (THAM), 4- (2-hydroxyethyl) -1-piperazineethanesulfonic acid (HEPES), morpholinoethanesulfonic acid (MES), carbamoylmethyliminobisacetic acid (ADA), piperazine -1,4-bis (2-ethanesulfonic acid) (PIPES), N- (2-acetamido) -2-aminoethanesulfonic acid (ACES), collamine hydrochloride, N, N-bis (2-hydroxyethyl)- 2-Aminoethanesulfone Good buffers such as acid (BES), N-tris (hydroxymethyl) methyl-2-aminoethanesulfonic acid (TES), acetamide glycine, tricine, glycinamide, bicine, phosphate buffer, tris buffer, etc. .

<Chelating agent>
Examples of the chelating agent include ethylenediaminetetraacetic acid and salts thereof (such as ethylenediaminetetraacetic acid dihydrogen disodium salt).

<Preservatives and fungicides>
Examples of antiseptics and fungicides include sodium benzoate, sodium pentachlorophenol, sodium 2-pyridinethiol-1-oxide, sodium sorbate, sodium dehydroacetate, 1,2-dibenzoisothiazolin-3-one (Zeneca Corporation) Proxel CRL, Proxel BDN, Proxel GXL, Proxel XL.2, Proxel TN, Proxel LV), 4-chloro-3-methylphenol (Pyventol CMK, etc., Bayer) and the like.

<Rust preventive>
Examples of the rust preventive include benzotriazole.

1.2.1.2. Preparation Method of Ink Composition The ink composition is obtained by mixing the components described above in an arbitrary order and removing impurities by filtering or the like as necessary. As a method for mixing the components, a method in which materials are sequentially added to a container equipped with a stirring device such as a mechanical stirrer or a magnetic stirrer and stirred and mixed is suitably used. As a filtration method, centrifugal filtration, filter filtration, or the like can be performed as necessary.

1.2.1.3. Physical Properties of Ink Composition The above ink composition has a surface tension at 20 ° C. of 20 mN / m or more and 40 mN / m or less from the viewpoint of a balance between image quality and reliability as an ink composition for inkjet printing. Preferably, it is 23 mN / m or more and 38 mN / m or less. The surface tension is measured by, for example, measuring the surface tension when the platinum plate is wetted with ink in an environment of 20 ° C. using an automatic surface tension meter CBVP-Z (trade name, manufactured by Kyowa Interface Science Co., Ltd.). It can be measured by checking.

  From the same viewpoint, the viscosity of the ink composition at 20 ° C. is preferably 1.5 mPa · s or more and 10 mPa · s or less, and more preferably 2 mPa · s or more and 8 mPa · s or less. The viscosity can be measured, for example, using a viscoelasticity tester MCR-300 (trade name, manufactured by Pysica) under a 20 ° C. environment.

1.2.2. Image Forming Step The image forming step is a step of forming (printing) an image on the surface of the fabric base by ejecting droplets of the ink composition from the recording head, and is performed by the image forming means 40 described above. be able to.

When using the inkjet recording apparatus 1000 described above, first, the fabric base 1 is set in the inkjet recording apparatus 1000 so that the fabric base 1 can be transported by the transport means 10. Next, the transport unit 10 is operated to eject the ink composition droplets from the recording head 41 to form an image on the surface of the fabric substrate 1. An image is formed (printed) by adhering droplets of the ink composition ejected from the recording head to a predetermined region of the fabric substrate. The image forming process can also be called a textile printing process.

  Examples of the material constituting the fabric substrate include hydrophobic synthetic fibers such as polyester, acetate, triacetate, nylon, and acrylic. As the fabric base material, the above-described fibers may be in any form such as a woven fabric, a knitted fabric, and a non-woven fabric.

  The shape of the fabric substrate is not particularly limited and may be a single sheet or a continuous body as shown in FIG.

  In addition, before the ink composition is ejected from the recording head (that is, before the image forming step), a processing agent applying step for applying the above-described processing agent to the surface of the fabric base 1 is performed by the processing agent applying means 30. Also good. As described above, the treatment agent applying means is not necessarily performed by a printing machine, and may be separately performed by a pad method, a coating method, a spray method, or the like so that the treatment agent is included in the fabric base material. By imparting a treatment agent to the surface of the fabric substrate, it is possible to improve the dyeability of the disperse dye contained in the ink composition.

1.2.3. Plasma irradiation process The plasma irradiation process is a process for generating a plasma generated by plasma irradiation means after the image forming process and before the wet heat treatment process, or after the wet heat treatment process and before the cleaning process. This is a step of imparting water repellency to a portion of the surface where an image is not formed by selectively irradiating the portion.

  In the plasma irradiation step, the surface of the fabric base material can be roughed and fine irregularities can be periodically formed by using a remote jet type plasma irradiation means that does not bring the fabric base material into contact with the discharge portion. . Thereby, what is called a lotus effect is provided to the surface of a fabric base material, and the water repellency of the surface of a fabric base material can be raised more. By increasing the water repellency of the part where the image is not formed, the disperse dye is less likely to re-adhere to the part in the subsequent cleaning step, and thus it is possible to effectively reduce the white-spot contamination.

1.2.4. Wet heat treatment process It is preferable that the manufacturing method of the printed material which concerns on this embodiment includes a wet heat treatment process. The wet heat treatment step is a step of performing a wet heat treatment on the formed image after the image forming step. For example, the wet heat treatment step can be performed by the wet heat treatment means 50 described above. This further improves the dispersibility of the disperse dye.

  A conventionally well-known method can be used for a wet heat treatment process, for example, HT method (high temperature steaming method), HP method (high pressure steaming method), etc. are mentioned.

  The heating temperature during the wet heat treatment step is preferably 80 ° C. or higher and 120 ° C. or lower, and preferably 90 ° C. or higher and 110 ° C. or lower in order to achieve both improvement in dyeability and reduction in damage to the fabric substrate. Is more preferable. The heating time in the wet heat treatment step can be, for example, 3 minutes to 30 minutes.

1.2.5. Cleaning Step The cleaning step is a step of removing the disperse dye that is not dyed on the fabric substrate by washing the fabric substrate on which the image is formed after the plasma irradiation step or after the wet heat treatment step. In the washing step, water may be used or an aqueous solution containing a reducing agent may be used.

  The aqueous solution containing the reducing agent preferably contains a reducing agent, an alkali agent, a soaping agent, and water. As the reducing agent, for example, hydrosulfite, thiourea dioxide or the like can be used in an amount of 2 to 10 g / L. Moreover, as an alkaline agent, sodium hydroxide, sodium carbonate, etc. can be used in the quantity of 2-10 g / L. As the soaping agent, a commercially available surfactant can be used. For example, Sunmall BK20L (manufactured by Nikka Chemical Co., Ltd.), Adecanol TS-800 Conch (manufactured by ADEKA Corporation), Artrin A-132 ( Kyoeisha Chemical Co., Ltd.), Grand Up AX-08 (Sanyo Chemical Industries Co., Ltd.), Diamond 330, Teepol B-81, Tripole RC, Monogen 170T, Monogen SS, Monogen 2NT (above, Daiichi Kogyo Seiyaku) Co., Ltd.), Rakkor STA (manufactured by Meisei Chemical Co., Ltd.), and the like.

  In the method for manufacturing a printed material according to the present embodiment, it is preferable to use washing with water and washing with an aqueous solution containing a reducing agent in combination. By using washing with water and washing with an aqueous solution containing a reducing agent in combination, disperse dyes that could not be dyed on the fabric substrate can be effectively removed, and white spot contamination can be further reduced. Is possible.

  Specifically, by first washing the fabric substrate on which an image is formed with water, most of the disperse dye that could not be dyed can be removed. Thereafter, neutralization of the alkaline agent remaining in the fabric substrate that has been treated at 60 to 95 ° C. for 10 to 30 minutes at a temperature of 60 to 95 ° C. and then subjected to reduction and cleaning, washed with water and dried. By passing through these steps, the disperse dye is effectively removed, and a printed matter with reduced white-spot contamination can be obtained.

  In addition, it is preferable that it is 240 seconds or less until it starts cleaning a fabric base material after a plasma irradiation process. When the above time is 240 seconds or less, the process is shifted to the cleaning process with a high water repellency effect obtained by the plasma irradiation process, so that it is possible to more effectively reduce the white background contamination. Therefore, it is possible to produce a good printed product with reduced white-spot contamination.

2. Printed matter The printed matter according to the present embodiment is manufactured by the above-described method for manufacturing a printed matter. The printed matter obtained by the above-described method for producing a printed matter is a printed matter having excellent light resistance of an image and reduced white field contamination.

  The OD value of the printed material can be used as an index of light resistance. Even if the printed matter obtained by the above-described method for producing a printed matter is subjected to an aging treatment including an oxidation step by light, gas, and heat (for example, indoor light resistance of about 5 years). When the OD value before the aging process is 100%, the OD value after the aging process can be 80% or more and 120% or less. This indicates that the printed matter obtained by the above-described method for producing a printed matter is excellent in light resistance.

3. Textile printing method According to the present embodiment, the textile printing method comprises a step of ejecting droplets of an ink composition containing water and a disperse dye from a recording head to form an image on the surface of a fabric substrate, and the image , The step of selectively irradiating the surface of the fabric base with no plasma formed thereon, and the step of cleaning the fabric base after irradiating the plasma It is characterized by including these.

According to the textile printing method according to the present embodiment, by selectively irradiating plasma to a portion on the surface of the fabric substrate where an image is not formed, that is, a portion that becomes a white background, water repellency is applied to the portion. Can be granted. This makes it difficult for the disperse dye to permeate into the portion that becomes white at the time of washing, and therefore, it is possible to reduce white-soil contamination even if a disperse dye that is not easily decomposed by the reducing agent is used.

  Since the textile printing method according to the present embodiment can be carried out based on the method for producing a printed material described above, the description thereof is omitted.

4). EXAMPLES Hereinafter, the present invention will be specifically described based on examples, but the present invention is not limited to these examples.

4.1. Preparation of Ink Composition Each component was put into a container so as to have the composition shown in Table 1, mixed and stirred for 2 hours with a magnetic stirrer, and then filtered with a membrane filter having a pore size of 5 μm, whereby ink 1 to ink 4 were prepared. Obtained. In addition, the numerical value in Table 1 represents the mass%. “-” In Table 1 indicates that the component is not added.

In addition, it supplements description below about the component in Table 1. FIG.
・ C. I. Disperse Red 58 (disperse dye containing azo skeleton, light fastness 3-4) C.I. I. Disperse Red 13 (disperse dye containing azo skeleton, light fastness 5-6) C.I. I. Disperse Red 4 (disperse dye containing anthraquinone skeleton, light fastness 7)
・ C. I. Reactive Red 53 (monoazo (vinylsulfonyl derivative), reactive dye)
PD-002W (trade name, manufactured by Nissin Chemical Industry Co., Ltd., acetylene glycol surfactant)
In addition, about the light resistance of said disperse dye, it is the value evaluated according to "ISO 105 B02".

4.2. Evaluation test 4.2.1. Preparation of Sample for Evaluation Test In order to prepare the following sample for evaluation test, a printing machine in which an inkjet printer PX-G930 (trade name, manufactured by Seiko Epson Corporation) was modified was used. Specifically, four plasma irradiation means were mounted on the side surface of the recording head of the inkjet printer PX-G930. With such a configuration of the printing machine, after an ink composition droplet is ejected from the recording head to form an image on the surface of the fabric substrate, an image of the surface of the fabric substrate is continuously formed. It was made possible to perform plasma irradiation on the unexposed areas. In this manner, an ink jet printer having the same configuration as that shown in FIGS. 1 to 3 was manufactured.

  The sample for evaluation test was produced as follows. First, using the inkjet printer modified as described above, an image is formed in a predetermined region on the surface of the fabric base material (image forming step), and the region on which the image of the surface of the fabric base material is not formed under the following conditions Was subjected to plasma irradiation treatment (plasma irradiation step). Subsequently, steaming was performed at 100 ° C. for 10 minutes by a wet heat treatment means (wet heat treatment step). Next, the fabric substrate on which the image is formed is taken out from the ink jet printer, washed with water, and further subjected to reduction cleaning under the following conditions using a dyeing tester (manufactured by Matisse, model “Turby type T”). It was. Then, what was dried at 80 degreeC for 30 minutes was made into the sample for evaluation tests.

<Types of fabric base material>
The fabric substrate used was polyester (fabric color: white, material: 100% polyester), acetate (fabric color: white, material: diacetate 100%), vinylon (fabric color: white, material: vinylon 100%), Nylon (fabric color: white, material: 100% nylon, plain weave), acrylic (fabric color: white, material: 100% acrylic).

<Image forming conditions>
Printing speed: Printing was performed at the speed shown in Table 2.
-Image resolution: 1440 x 1440 dpi
・ Duty: 100%

<Plasma irradiation conditions>
-Gas types: The gas types in Table 2 are as follows.
Gas 1: Argon 100% by volume
Gas 2: 100% by volume of nitrogen
Gas 3: 99% by volume of nitrogen + 1% by volume of carbon tetrafluoride
・ Gas flow rate: 30L / min
・ Plasma irradiation means: adopts remote jet system under atmospheric pressure.
・ Irradiation gap (distance between plasma irradiation nozzle tip and fabric substrate): 2.5 mm
・ Irradiation time: Depends on printing speed. That is, the faster the printing speed, the faster the moving speed of the recording head, and the shorter the plasma irradiation time.
・ Electricity 100Wh
・ Frequency 13.56MHz
In addition, in Comparative Example 1 in Table 2, plasma irradiation was not performed only by flowing gas. That is, in the plasma irradiation apparatus shown in FIG. 2, only gas was allowed to pass without discharging between the electrodes 23a and 23b.

<Reduction cleaning conditions>
-Temperature conditions: The temperature was increased from 25 ° C to 85 ° C at a temperature increase rate of 2 ° C / min, held at 85 ° C for 10 minutes, and then decreased from 85 ° C to 25 ° C at a temperature decrease rate of 3 ° C / min.
Stirring: Rotational speed 800 rpm (Rotation: 55s, left rotation 55s cycle)
Washing solution: 150 g of water, 0.3 g of Rakkor STA (soaping agent, manufactured by Meisei Chemical Co., Ltd.), 0.3 g of hydrosulfite (manufactured by Wako Pure Chemical Industries, Ltd.), 0.3 g of 10 N sodium hydroxide aqueous solution

4.2.2. Evaluation method <Color development (OD value)>
The OD value was measured for the image formation region of 100% duty of the evaluation sample obtained above using a colorimeter (product name “Gretag Macbeth Spectrolino”, manufactured by X-RITE). The evaluation criteria are as follows. The results are also shown in Table 2.
A: OD value is 1.50 or more B: OD value is 1.40 or more and less than 1.50 C: OD value is less than 1.40

<White field contamination>
Using the colorimeter (product name “Gretag Macbeth Spectrolino”, manufactured by X-RITE Co., Ltd.), the OD value before and after the washing step is used for the region where the image of the evaluation test sample obtained above is not formed (white field). Measured. The white spot contamination was evaluated according to how much the OD value after washing changed with respect to the OD value before washing. The evaluation criteria are as follows. The results are also shown in Table 2.
A: Change in OD value is less than 10% B: Change in OD value is 10% or more and less than 20% C: Change in OD value is 20% or more

<Light resistance>
The light resistance was evaluated according to “ISO 105 B02”. That is, the evaluation test sample obtained above was used as a test piece having a size of 10 mm × 40 mm or more, and evaluation was performed by measuring a radiation exposure amount until standard fading using a xenon lamp (300 to 400 nm).
A: The radiation exposure dose is greater than 28700 mJ / cm ² (light resistance of 7 or more).
B: radiant exposure is greater than ^{3800mJ / cm 2, 28700mJ / cm} 2 or less (light resistance 5-6).
C: Radiation exposure amount is 3800 mJ / cm ² or less (light resistance 4 or less).

4.3. Evaluation results Table 2 shows the results of the evaluation tests.

  According to the evaluation results of Examples 1 to 11 shown in Table 2, even if an ink composition containing any disperse dye is used, a plasma is formed in a region where an image on the surface of the fabric substrate is not formed. It has been found that by improving the water repellency by irradiating water, it is possible to achieve both good light resistance of an image and reduction of white-spot contamination on a wide variety of fabric base materials.

  According to the evaluation results of Examples 1 and 2, both use disperse dyes containing an azo skeleton, but are not easily decomposed by light or a reducing agent. I. Even when Disperse Red 13 was used, it was found that white field contamination can be effectively reduced and the light resistance of the image is also good.

  According to the evaluation results of Example 3, C.I. containing an anthraquinone skeleton that is very difficult to be decomposed by light or a reducing agent. I. Even when Disperse Red 4 was used, it was found that white field contamination can be reduced and the light resistance of the image is good.

  When the evaluation results of Example 2 and Examples 4 to 5 are compared, the water repellent effect is higher when fluorine is included in the gas type used in the plasma irradiation, and the effect of reducing white-field contamination is reduced. Was found to be expensive.

  Comparing the evaluation results of Example 2 and Examples 6-7, since the plasma irradiation means is mounted on the side surface of the recording head, the plasma irradiation time becomes longer as the printing speed becomes slower. A tendency to increase the effect of reducing white spot contamination was observed.

  On the other hand, in Comparative Example 1, since plasma irradiation was not performed, it was found that the water repellent effect could not be obtained and white field contamination occurred.

  According to the evaluation result of Comparative Example 2, the reactive dye C.I. I. By using Reactive Red 53, it was found that the fixability was lower than that of the disperse dye, and no white-colored contamination occurred, but no color developability was obtained.

  The present invention is not limited to the embodiments described above, and various modifications are possible. For example, the present invention includes substantially the same configuration (for example, a configuration having the same function, method and result, or a configuration having the same purpose and effect) as the configuration described in the embodiment. In addition, the invention includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced. In addition, the present invention includes a configuration that exhibits the same operational effects as the configuration described in the embodiment or a configuration that can achieve the same object. In addition, the invention includes a configuration in which a known technique is added to the configuration described in the embodiment.

DESCRIPTION OF SYMBOLS 1 ... Fabric base material, 10 ... Conveyance means, 11 ... Roller, 12 ... Platen, 20 ... Plasma irradiation means, 21 ... Plasma generating part, 22 ... Gas supply chamber, 23 ... Electrode pair, 23a, 23b ... Electrode, 24 ... Power source, 25 ... plasma irradiation nozzle, 26 (26a, 26b) ... exhaust pipe, 29 ... gas reservoir, 30 ... treatment agent applying means, 40 ... image forming means, 41 ... inkjet recording head, 50 ... wet heat treatment means, 1000: Inkjet recording device, D: Discharge portion

Claims (10)

Preparing an ink composition containing water and a disperse dye;
Ejecting droplets of the ink composition from a recording head to form an image on the surface of the fabric substrate;
After forming the image, selectively irradiating a portion of the surface of the fabric substrate where the image is not formed with plasma;
Cleaning the fabric substrate after irradiating the plasma;
A method for producing a printed material.   The method for producing a printed material according to claim 1, further comprising a wet heat treatment of the fabric substrate on which the image is formed between the step of forming the image and the step of cleaning the fabric substrate. .   The method for producing a printed material according to claim 1 or 2, wherein the plasma is generated and irradiated under atmospheric pressure.   4. The time until the cloth substrate is started to be washed after the plasma has been irradiated to a predetermined position of the fabric substrate is 240 seconds or less. 5. A manufacturing method for printed materials.   The method for producing a printed material according to any one of claims 1 to 4, wherein the disperse dye includes an azo skeleton or an anthraquinone skeleton.   The washing | cleaning in the process of wash | cleaning the said fabric base material contains any one or both of washing | cleaning with water, and washing | cleaning with the aqueous solution containing a reducing agent. A method for manufacturing printed materials.   A printed matter produced by the method for producing a printed matter according to any one of claims 1 to 6.   The printed material according to claim 7, wherein the OD value after the aging treatment is 80% or more and 120% or less when the OD value before the aging treatment is 100%.   The printed matter according to claim 8, wherein the aging treatment includes a step of oxidation by light, gas, and heat. A step of ejecting droplets of an ink composition containing water and a disperse dye from a recording head to form an image on the surface of the fabric substrate;
After forming the image, selectively irradiating a portion of the surface of the fabric substrate where the image is not formed with plasma;
Cleaning the fabric substrate after irradiating the plasma;
A textile printing method.

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