JP4755269B2 - Fabric inkjet recording method and recording apparatus using ultraviolet curable ink - Google Patents

Description

  The present invention relates to an ink jet recording method on a fabric using an ultraviolet curable ink, and relates to an ink jet recording method and a recording apparatus capable of providing a high density image without bleeding and imparting design properties.

  In recent years, various types of printers are widely used for computer output. In particular, inkjet printers have excellent quietness, cost, and image quality. In particular, they can reproduce full-color images with high quality and have superior performance that other methods do not have. A lot of research has been done on recording methods.

  Among ink jet recording methods, an ink jet recording method using an ultraviolet curable ink has attracted attention. This method has an advantage of excellent durability after application of ink because ink can be cured by irradiating ultraviolet rays immediately after ink is ejected from the head. However, there is a considerable amount of time between the irradiation of ultraviolet curable ink and the irradiation of ultraviolet rays. As a result, even if the ultraviolet rays are irradiated immediately, the ink bleeding cannot be suppressed depending on the recording medium. Can occur.

  In view of this, a method of providing an ink receiving layer to improve ink absorptivity and the like has been studied (see, for example, Patent Document 1 and Patent Document 2).

  However, the provision of the ink receiving layer increases the number of processes in the manufacturing process, which impairs the merit of being able to manufacture with a small lot and a short delivery time.

  Further, when the contact angle with respect to pure water on the surface of the recording medium satisfies a certain condition and satisfies a specific relationship between the volume of ink applied and the volume of ink that can be absorbed by the recording medium, the ink receiving layer is not provided. It is said that good wettability of the ink layer can be obtained and good ink jet printing is possible (see, for example, Patent Document 3). However, the present invention is directed to a film having good wettability, and bleeding cannot be completely prevented even if the recording medium is transferred to a fabric.

  Further, the ultraviolet curable composition is applied using an ink jet recording apparatus having a configuration in which the liquid composition head, the ultraviolet irradiation device, and the ink head are arranged in this order along the moving direction of the recording medium. A method of applying ink after curing by providing an ink receiving layer is disclosed (for example, see Patent Document 4). However, this invention is mainly intended for acrylic plates, not for fabrics, and even if the recording medium is diverted to fabrics, bleeding cannot be completely prevented. In addition, since the ink jet recording method uses dye ink or pigment ink, it takes time to dry. Further, since the ink jet device does not have a heating device, it is difficult to control the viscosity of the ink. is there. Further, since the composition uses water or a volatile solvent, there is a risk of foaming when the composition is cured by ultraviolet rays, which deteriorates the appearance and accelerates the deterioration of the cured product. .

  On the other hand, the current situation is that the recording medium has not been sufficiently studied. In particular, the fabric according to the present invention has a problem of bleeding and density at the time of printing due to the particularity of its properties, and has not yet been completed in the prior art.

JP 59-190885 A Japanese Patent Laid-Open No. 11-321083 JP 2000-117960 A JP-A-8-150707

  In the ink jet recording method for a fabric, the present invention can omit a pretreatment step, and can further produce a recorded material having excellent design properties, and does not bleed an image and can produce a high-density recorded material. The purpose is to provide.

  That is, the present invention is an ink jet recording method for a fabric using an ultraviolet curable ink, a process of forming a three-dimensional pattern by repeating a process of applying a transparent ultraviolet curable ink and curing with ultraviolet light, coloring The present invention relates to an ink jet recording method comprising a step of forming a stereoscopic image by applying an ultraviolet curable ink containing a component.

  The transparent ultraviolet curable ink and the ultraviolet curable ink containing a coloring component are composed of a reactive oligomer, a reactive diluent, and a photopolymerization initiator, and the reactive oligomer is 1 to 1 in the transparent ultraviolet curable ink. The ultraviolet curable ink containing 70% by weight and the coloring component is preferably contained in an amount of 1 to 60% by weight.

  It is preferable that the transparent ultraviolet curable ink and the ultraviolet curable ink containing a coloring component are heated by a heating device and then discharged.

  As described above, according to the present invention, a recorded matter excellent in design can be produced, and an ink jet recorded matter having a high density can be provided without blurring of an image.

It is a conceptual diagram of this invention. It is a conceptual diagram of this invention. It is a conceptual diagram of a two-stage recording method. It is a conceptual diagram of a linear recording method. It is sectional drawing of the recorded matter at the time of using a textile fabric as a recording medium.

  The present invention is an ink jet recording method on a fabric using an ultraviolet curable ink. After applying a transparent ultraviolet curable ink (hereinafter referred to as a transparent ink) to a fabric as a recording medium, the composition is cured by ultraviolet rays. The present invention also relates to an ink jet recording method for forming an image by applying an ultraviolet curable ink containing a coloring component (hereinafter referred to as a color ink) and curing with an ultraviolet ray.

  In the present invention, a fabric is used as a recording medium. Since the fabric is superior in durability and texture compared to paper, the fabric printed by the method of the present invention can be used as clothing, interior material, sheet material, cloth signboard, tent cloth, and other industrial materials.

  Although it does not specifically limit as a fabric, Specifically, a knitted fabric, a textile fabric, a nonwoven fabric, a napping fabric etc. are mention | raise | lifted. Examples of woven fabrics include plain weave, twill weave, and satin weave. Examples of knitted fabric include weft knitting such as flat knitting, rubber knitting, and pearl knitting, and warp knitting such as single tricot knitting, single cord knitting, and single atlas knitting. It is done.

  In addition, as materials constituting these, inorganic fibers such as metal fibers, glass fibers, rock fibers and mineral rhino fibers, regenerated fibers such as rayon, semi-synthetic fibers such as acetate and triacetate, polyamide, polyester, polyvinyl chloride, Synthetic fibers such as polyvinylidene chloride, polyacrylonitrile, polyvinyl alcohol, polyurethane, polyethylene, polypropylene, and polyfluorinated ethylene, natural fibers such as cotton, hemp, silk, and hair, biodegradable fibers made from lactic acid or corn, etc. Fiber. These can be used alone or in combination of two or more.

  Among these, synthetic fibers are preferable from the viewpoints of durability and adhesion to ultraviolet curable ink, and among them, polyester having versatility and strength is more preferable.

  Normally, when coloring a fabric, the unevenness on the surface causes irregular reflection of light, so that the color density on the fabric surface may appear thin. However, in the present invention, as shown in FIG. 5, the transparent ink is applied to the fabric 1 and cured with ultraviolet rays to form the transparent ink layer 14, thereby making the fabric surface smooth and the color ink thereon. By imparting, irregular reflection can be prevented and a high-density recorded image can be obtained. Also, bleeding can be prevented by applying color ink after application of transparent ink.

When the transparent ink is first applied to the fabric, the transparent ink bleeds as a result, but the bleed does not cause any problem because it is transparent. Further, since a transparent ink layer is formed between the fabric and the color ink, the transparent ink layer serves as a so-called foundation. Therefore, it is possible to prevent bleeding when the color ink is applied. Therefore, the transparent ink is preferably colorless and transparent, but may be the same color as the color of the fabric or a lighter color than the fabric. Moreover, in order to acquire these effects, it is preferable that the application amount of transparent ink is 5-100 g / m < ² >. If it is less than 5 g / m ² , effects such as prevention of bleeding cannot be exhibited, and if it exceeds 100 g / m ² , the fabric feels poor and the properties of the fabric tend to be lost.

  In the ink jet recording method of the present invention, it is also possible to form a three-dimensional pattern with excellent design properties.

  In the case of forming a three-dimensional pattern, it is achieved by repeating the process of applying a transparent ink and irradiating ultraviolet rays a plurality of times in accordance with the three-dimensional shape. Specifically, a transparent shape is hardly applied to the concave portion, and a three-dimensional shape is formed by repeatedly applying the transparent ink to the convex portion. Furthermore, it is possible to form a three-dimensional image having excellent design properties by applying color ink to a pattern different from the shape according to the shape.

  Further, in the method of the present invention, it is not necessary to pre-treat the fabric, but it is also possible to perform pre-treatment such as surface treatment on the fabric as needed. Specific examples of the surface treatment method include corona treatment, plasma treatment, and alkali treatment.

  Next, transparent ink and color ink will be described.

  The basic composition of the ultraviolet curable ink used in the present invention comprises a reactive oligomer, a reactive diluent, and a photopolymerization initiator. Here, the oligomer refers to a polymer in which monomer units are repeated about 2 to several tens. In the present invention, an oligomer is used instead of a monomer or a polymer because the hardness and adhesion of the obtained cured film are poor with a monomer, and the polymer has a high viscosity and poor ink ejection stability. In addition, the polymer cannot be sufficiently polymerized by ultraviolet rays.

  Reactivity refers to having a reactive functional group in the oligomer, and examples of the reactive functional group include an acrylic functional group and an epoxy functional group. Among these, an acrylic functional group is preferable because it is versatile and has a wide variety of resins.

  The reactive functional group in the molecule of the reactive oligomer preferably has 2 to 4 functional groups, and more preferably has 2 functional groups. When there are more reactive functional groups than tetrafunctional groups, the number of crosslinking points of the cured film also increases, and the resulting cured film is hard, but on the other hand, it becomes brittle and therefore tends to have poor adhesion.

  Examples of the reactive oligomer include urethane acrylate, polyester acrylate, epoxy acrylate, silicon acrylate, and polybutadiene acrylate. These can be used alone or in combination of two or more.

  Among these, urethane acrylate and polyester acrylate are preferable because they are excellent in hardness, toughness, adhesion, and weather resistance.

  The reactive diluent means a monomer having a reactive functional group, and is used for reducing the viscosity of the ultraviolet curable ink and maintaining the ejection stability. Examples of the reactive functional group include those similar to the reactive oligomer.

  Examples of reactive diluents include hexafunctional dipentaerythritol hexaacrylate and their modified products, 5-functional dipentaerythritol hydroxypentaacrylate, tetrafunctional pentaditrimethylolpropane tetraacrylate, ethoxylated pentaerythritol tetraacrylate, pentaerythritol. Tetraacrylate, trifunctional trimethylolpropane triacrylate, ethylene oxide-modified trimethylolpropane triacrylate, pentaerythritol triacrylate, tris (2-hydroxyethyl) isocyanurate triacrylate, propoxylated glyceryl triacrylate, bifunctional hydroxypivalic acid Neopentyl glycol diacrylate, polytetramethylene glycol diacrylate, tri Tyrolpropane acrylic acid benzoate, diethylene glycol diacrylate, triethylene glycol diacrylate, tetraethylene glycol diacrylate, polyethylene glycol (200) diacrylate, polyethylene glycol (400) diacrylate, polyethylene glycol (600) diacrylate, polyethylene glycol (1000) diacrylate, polypropylene glycol (400) diacrylate, polypropylene glycol (700) diacrylate, neopentyl glycol diacrylate, propoxylated neopentyl glycol diacrylate, 1,3-butanediol diacrylate, 1,4-butane Diol diacrylate, 1,6-hexanediol diacrylate, 1,9- Nandiol diacrylate, dimethylol tricyclodecane diacrylate, bisphenol A ethylene oxide adduct diacrylate, monofunctional caprolactone acrylate, tridecyl acrylate, isodecyl acrylate, isooctyl acrylate, isomyristyl acrylate, isostearyl acrylate, 2- Ethylhexyl diglycol acrylate, 2-hydroxybutyl acrylate, 2-acryloyloxyethyl hexahydrophthalic acid, neopentyl glycol acrylate benzoate, isoamyl acrylate, lauryl acrylate, stearyl acrylate, butoxyethyl acrylate, ethoxydiethylene glycol acrylate, methoxytri Ethylene glycol acrylate, methoxypoly Ethylene glycol acrylate, methoxydipropylene glycol acrylate, phenoxyethyl acrylate, phenoxypolyethylene glycol acrylate, nonylphenol ethylene oxide adduct acrylate, tetrahydrofurfuryl acrylate, isobornyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxy Examples include -3-phenoxypropyl acrylate, 2-acryloyloxyethyl succinic acid, 2-acryloyloxyethyl phthalic acid, 2-acryloyloxyethyl-2-hydroxyethyl phthalic acid, and the like. Furthermore, a reactive diluent in which a phosphorus compound or fluorine is bonded to these may be used, and in order to suppress skin irritation, a reactive diluent in which these are modified with ethylene oxide or propylene oxide may be used. . In addition, these can be used individually or in combination of 2 or more types.

  The reactive functional group in the molecule of the reactive diluent is preferably 2 to 4 functional groups, more preferably bifunctional. When there are more reactive functional groups than tetrafunctional groups, the number of crosslinking points of the cured film also increases, and the resulting cured film is hard, but on the other hand, it becomes brittle and therefore tends to have poor adhesion.

  Examples of the photopolymerization initiator include benzoin-based, thioxanthone-based, benzophenone-based, ketal-based, and acetophenone-based compounds, and these can be used alone or in combination of two or more.

  Since the transparent ink used in the present invention is a foundation for color ink, it is preferable to have excellent adhesion to the fabric. Specifically, the reactive oligomer is preferably contained in an amount of 1 to 40% by weight, more preferably 2 to 20% by weight. If it is less than 1% by weight, the adhesiveness is inferior, and if it exceeds 40% by weight, the adhesiveness is improved, but the viscosity of the ink becomes too high, and the ejection stability from the inkjet head is inferior.

  However, when the transparent ink is heated, the viscosity decreases with the activation of the molecules in the ink, so that the amount of the reactive oligomer can be increased, and the adhesion to the fabric or the adhesion to the color ink tends to be improved. is there. When heating, it is preferable to contain 1-70 weight% of reactive oligomers, and it is more preferable to contain 2-50 weight%. If it exceeds 70% by weight, the viscosity of the ink becomes too high and the ejection stability from the inkjet head tends to be inferior.

  The transparent ink of the present invention preferably contains 10 to 90% by weight of reactive diluent, more preferably 20 to 80% by weight. If the amount is less than 10% by weight, the viscosity of the ink may not be sufficiently lowered. If the amount exceeds 90% by weight, the adhesion and flexibility of the resulting cured film tend to be insufficient.

  The transparent ink of the present invention preferably contains 1 to 10% by weight of photopolymerization initiator, and more preferably 2 to 6% by weight. If it is less than 1% by weight, the UV curable ink may be uncured. If it exceeds 10% by weight, an unreacted product of the photopolymerization initiator remains in the cured film. When an object receives light from the sun or a fluorescent lamp, it tends to react with the cured film and deteriorate the cured film.

  The color ink used in the present invention is an ultraviolet curable ink containing a coloring component, and is not particularly limited as long as the basic composition is the same as that of the transparent ink. The color ink is simply a coloring component added to the transparent ink. It may be. By using the same color ink as that of the transparent ink, the adhesion with the transparent ink is improved, and after the color ink is ejected from the head, the color ink is cured immediately by UV irradiation. Therefore, durability after ink application is excellent, and ink bleeding can be prevented.

  The color ink of the present invention preferably contains 1 to 30% by weight of reactive oligomer, more preferably 2 to 15% by weight. If it is less than 1% by weight, the adhesiveness with the transparent ink will be inferior, and if it exceeds 30% by weight, the adhesiveness with the transparent ink will be improved. However, since the color ink contains a pigment, the viscosity of the ink is reduced. It becomes high and tends to be inferior in ejection stability from the inkjet head.

  Similarly to the transparent ink, when the ink is heated, the reactive oligomer is preferably contained in an amount of 1 to 60% by weight, more preferably 2 to 40% by weight. If it exceeds 60% by weight, the viscosity of the ink becomes too high, and the ejection stability from the inkjet head tends to be inferior.

  The addition amounts of the reactive diluent and the photopolymerization initiator are the same as in the case of the transparent ink.

  As the colorant used in the color ink, any of a pigment and a dye can be used. When weather resistance is required for the recorded matter, it is preferable to use a pigment. When the clearness of the recorded matter is required, it is preferable to use a dye. Therefore, any one of organic and inorganic is selected depending on the case.

  Examples of organic pigments include nitroso, dyed lakes, azos, phthalocyanines, anthraquinones, perylenes, quinacridones, dioxazines, isoindolines, quinophthalones, azomethines, pyrrolopyrroles, and the like.

  Inorganic pigments include metal oxides, hydroxides, sulfides, ferrocyanides, chromates, carbonates, silicates, phosphates, carbons (carbon black), metals Examples include powders. Furthermore, these mixtures and composites are also included.

  The dyes are oil-soluble such as azos, anthraquinones, indigoids, phthalocyanines, carboniums, quinoneimines, methines, nitros, nitroso, thiazoles, quinolines, lactones, hydroxyketones. Examples thereof include dyes, disperse dyes, acid dyes, reactive dyes, cationic dyes, and direct dyes.

  The addition amount of the pigment and the dye is preferably 0.05 to 20% by weight with respect to the color ink. If the concentration is less than 0.05% by weight, the concentration is insufficient, and if it exceeds 20% by weight, the ink has a high viscosity and is inferior in ejection stability from the inkjet head.

  Further, both the transparent ink and the color ink can be used together with an auxiliary agent such as a sensitizer in order to promote the initiation reaction of the photopolymerization initiator, but the amount thereof does not impair the effects of the present invention. To do.

  The transparent ink and color ink of the present invention can be obtained by performing filtration after mixing and dispersing the above components.

  Moreover, although mixing may mix | blend the material to be used in what order, it is preferable to perform mixing rapidly. Moreover, when using a coloring agent, it stirs further well so that uniformity may not be impaired.

  As a dispersion method, methods such as a roll mill, a ball mill, a colloid mill, a jet mill, and a bead mill can be employed.

  In addition, additives such as dispersants, heat stabilizers, antioxidants, preservatives, antifoaming agents, penetrants, and the like are added to the ultraviolet curable ink composition as necessary without impairing the effects of the present invention. can do.

  Next, the recording apparatus will be described.

  The application of the ultraviolet curable ink according to the present invention is performed by an inkjet method. As an inkjet method, on-demand such as a charge modulation method, a micro dot method, a charge ejection control method, a continuous method such as an ink mist method, a stem method, a pulse jet method, a bubble jet (registered trademark) method, an electrostatic suction method, etc. Any method can be adopted.

  The ink jet apparatus of the present invention includes a two-stage head (FIG. 3) or a linear head (FIG. 4).

  As shown in FIG. 3, the two-stage head is a head composed of a front-stage head including the ultraviolet irradiation device 6 and the transparent ink head 7, and a rear-stage head including the ultraviolet irradiation device 6 and the color ink heads 8 to 11. Sure. As described above, since the ultraviolet irradiation device is provided on both sides of the transparent ink head 7 and the color ink heads 8 to 11, since the ultraviolet irradiation can be performed immediately after the landing of the transparent ink and the color ink, the ink penetrates too much. Can be prevented. Further, according to this configuration, even when a large number of ink heads are installed for the purpose of increasing the types of color inks, it is possible to prevent an increase in size in the head driving direction. Further, the driving speed of the transparent ink head 7 can be set separately from the driving speed of the color ink heads 8 to 11. In addition, even if the position of the ultraviolet irradiation device 6 is other than that shown in FIG. For example, it can be appropriately installed between the ink head of color ink and the ink head.

  Further, the linear head refers to a head provided with the ultraviolet irradiation device 6, the transparent ink head 7, and the color ink heads 8 to 11 in a straight line as shown in FIG. As described above, since the ultraviolet irradiation device 6 and the transparent ink head 7 are provided on both sides of the color ink heads 8 to 11, since the ultraviolet irradiation can be performed immediately after the landing of the transparent ink and the color ink, the ink penetrates too much. Can be prevented. Further, according to this configuration, there is an advantage that the ink head can be driven by one control without being divided into the transparent ink and the color ink. In addition, even if the position of the ultraviolet irradiation device 6 is not shown in FIG. For example, it can be appropriately installed between the ink heads of color inks or at both ends of the transparent ink head 7.

  As a method of recording an image using the inkjet apparatus of the present invention, first, transparent ink is applied to the shape of the image with the transparent ink head 7 and immediately cured with the ultraviolet irradiation device 6. Next, there is a method of recording an image with the color ink heads 8 to 11 and curing it with the ultraviolet irradiation device 6 to obtain a recorded matter.

  By using the inkjet apparatus of the present invention having these two-stage heads and linear heads, there is an advantage that a series of steps can be performed with the same apparatus. Furthermore, since a necessary amount can be accurately applied to a necessary portion, even a transparent ink does not need to be applied to the entire surface, which is advantageous in terms of cost.

  The viscosity at the time of ink ejection is preferably 1 to 100 cps, and more preferably 5 to 50 cps. If it is less than 1 cps, it is substantially difficult to produce, and if it exceeds 100 cps, it tends to be difficult to eject ink from the inkjet head.

  The ink jet apparatus of the present invention preferably includes a heating device in the head. It is preferable to provide a heating device in the head because the viscosity of the ink can be lowered and the ink can be discharged while maintaining the temperature.

  The heating temperature is from normal temperature to 150 ° C, and more preferably from 30 to 70 ° C. This is because if it exceeds 150 ° C., the reactive oligomer or reactive diluent in the ink may be cured.

  The recording conditions and the ultraviolet irradiation conditions are not particularly limited as long as they are used for normal printing.

  Next, although an Example is given and this invention is demonstrated, this invention is not necessarily limited to the Example.

<Recording conditions>
B) Nozzle diameter: 70 μm
B) Applied voltage: 50V
C) Pulse width: 20μs
D) Drive frequency: 1 kHz
E) Resolution: 180 dpi

<Ultraviolet irradiation conditions>
A) Lamp type: Metal halide lamp i) Voltage: 120W / cm
E) Irradiation time: 1 second e) Irradiation height: 10 cm

<Recording medium>
A knitted fabric (flat knitting) made of 100% polyester was used as a recording medium.

<Recorded image>
As shown in FIGS. 1 and 2, two types of images were prepared and evaluated.

  The method shown in FIG. 1 is a method in which a transparent ink is applied and cured by ultraviolet irradiation, then a color ink is applied on the transparent ink, and cured by ultraviolet irradiation to obtain a recorded matter.

  In the method shown in FIG. 2, a process of applying a transparent ink in accordance with a stereoscopic image (a line-written portion is a convex portion) and curing by ultraviolet irradiation is repeated a plurality of times to form a stereoscopic shape, In this method, color ink is applied only to the smile mark and cured by ultraviolet irradiation to obtain a recorded matter. In the obtained recorded matter, only the smile mark at the center became a color image, and the star mark became a colorless image with the surface state changed.

<Evaluation details>
Bleeding: A fine line part (1 mm) and a handle were visually determined.
・ Sharp images are formed ・ ・ ・ ・ ○
・ Slight bleeding is recognized ・ ・ ・ ・ ・ ・ ・ ・ △
・ Bleeding is generally recognized ・ ・ ・ ・ ・ ・ ・ ×

Density: Measured with a reflection densitometer (Macbeth RD918). The higher the OD value (reflection density), the higher the density.
・ OD value 1.4 or higher
・ OD value 1.0 or more and less than 1.4 △ △
・ OD value less than 1.0

Designability: visually confirmed.
・ Excellent color image density, saturation, etc. In addition, the colorless image with the surface state changed is added to the color image, and the design is excellent.
・ Excellent color image density, saturation, etc.
・ No color image density and saturation, poor design

Example 1
(Preparation of transparent ink)
As a reactive oligomer, Ebecryl 270 (urethane acrylate (bifunctional), manufactured by Daicel UC Co., Ltd.) is 20 parts by weight. As a reactive diluent, SR-9003 (propoxylated neopentyl glycol diacrylate (bifunctional) 75 parts by weight of Sartomer Co., Ltd., and Irgacure 2959 (1- [4- (hydroxyethoxy) -phenyl] -2-hydroxy-2-methyl-1-propan-1-one, acetophenone series as a photopolymerization initiator And 5 parts by weight of Ciba Specialty Chemicals Co., Ltd.) were sufficiently stirred, and then impurities were removed by filtration to produce a colorless and transparent transparent ink. (Viscosity 13.1 mPa · s / 60 ° C)

(Preparation of color ink)
As a reactive oligomer, Ebecryl 270 (urethane acrylate (bifunctional), manufactured by Daicel UC Co., Ltd.) is 20 parts by weight. As a reactive diluent, SR-9003 (propoxylated neopentyl glycol diacrylate (bifunctional) 73.8 parts by weight of Sartomer), 1 part by weight of HOSTAPERM PINK E-02 (quinacridone red, Clariant) as a colorant, and Florene DOPA-33 (modified acrylic copolymer, Kyoeisha Chemical Co., Ltd.) as a dispersant. 0.3 part by weight, and Irgacure 2959 (1- [4- (hydroxyethoxy) -phenyl] -2-hydroxy-2-methyl-1-propan-1-one, acetophenone series, 5 weight of Ciba Specialty Chemicals Co., Ltd. Added and dispersed with a bead mill method, then, the impurity was removed by filtration to prepare a magenta ultraviolet-curable ink. (Viscosity 14.1 mPa · s / 60 ° C)

  Similarly, yellow [PV Fast Yellow H2G as a colorant, benzimidazolone (azo), manufactured by Clariant Co., Ltd.] (viscosity 14.9 mPa · s / 60 ° C.), cyan [toner cyan BG as a colorant, phthalocyanine, A color ink (manufactured by Clariant) (viscosity 13.3 mPa · s / 60 ° C.) and black [NiPex 180IQ, carbon black, manufactured by Degussa] (viscosity 13.5 mPa · s / 60 ° C.) was also produced.

(Recording method)
As a method for applying ink to the recording medium, the ink was heated with a heating device, and then an image was recorded using a two-stage head. (Heating temperature 60 ° C.) The application amount of the transparent ink was 40 g / m ² . The amount of color ink applied was 20 g / m ² . The evaluation results are shown in Table 1.

Example 2
The same recording method as in Example 1 was used except that an image was recorded using a linear head. The application amount of the transparent ink was 40 g / m ² . The amount of color ink applied was 20 g / m ² . The evaluation results are shown in Table 1.

Example 3
(Preparation of transparent ink)
As a reactive oligomer, 5 parts by weight of Ebecryl 270 (urethane acrylate (bifunctional), manufactured by Daicel UC), SR-9003 (propoxylated neopentyl glycol diacrylate (bifunctional) as a reactive diluent 90 parts by weight of Sartomer) and Irgacure 2959 (1- [4- (hydroxyethoxy) -phenyl] -2-hydroxy-2-methyl-1-propan-1-one, acetophenone series as a photopolymerization initiator And 5 parts by weight of Ciba Specialty Chemicals Co., Ltd.) were added and stirred sufficiently, and then impurities were removed by filtration to produce a colorless and transparent transparent ink. (Viscosity 22.1 mPa · s / 25 ° C)

(Preparation of color ink)
As a reactive oligomer, 5 parts by weight of Ebecryl 270 (urethane acrylate (bifunctional), manufactured by Daicel UC), SR-9003 (propoxylated neopentyl glycol diacrylate (bifunctional) as a reactive diluent 88.7 parts by weight of Sartomer), 1 part by weight of HOSTAPERM PINK E-02 (quinacridone red, Clariant) as a colorant, and Florene DOPA-33 (modified acrylic copolymer, Kyoeisha Chemical Co., Ltd.) as a dispersant. 0.3 parts by weight) and Irgacure 2959 (1- [4- (hydroxyethoxy) -phenyl] -2-hydroxy-2-methyl-1-propan-1-one, acetophenone as a photopolymerization initiator 5 parts by weight of Ciba Specialty Chemicals Co., Ltd. For example, it dispersed with a bead mill method, then, the impurity was removed by filtration, to prepare a magenta ultraviolet-curable ink. (Viscosity 23.5mPa · s / 25 ° C)

  Similarly, yellow [PV Fast Yellow H2G as a colorant, benzimidazolone (azo), manufactured by Clariant Co., Ltd.] (viscosity 23.1 mPa · s / 25 ° C.), cyan [toner cyan BG as a colorant, phthalocyanine, A color ink (manufactured by Clariant) (viscosity 22.9 mPa · s / 25 ° C.) and black [NiPex 180IQ, carbon black, manufactured by Degussa] (viscosity 23.3 mPa · s / 25 ° C.) was also produced.

(Recording method)
An image was recorded using a two-stage head in the same manner as in Example 1 except that the transparent ink and the color ink were ejected without heating and the image was recorded. The application amount of the transparent ink was 40 g / m ² . The amount of color ink applied was 20 g / m ² . The evaluation results are shown in Table 1.

Comparative Example 1
(Preparation of color ink)
Similar to the color ink of Example 1, yellow, magenta, cyan, and black color inks were produced.

(Recording method)
A heatable inkjet printer head and an ultraviolet lamp were used as a method for applying and curing ink to the recording medium. Colored ink was directly discharged onto the fabric and UV cured to obtain a recorded matter. (Heating temperature 60 ° C.) The evaluation results are shown in Table 1.

  As is apparent from Table 1, the ink jet recordings of Examples 1 to 3 produced by the method according to the present invention were sharp images with no bleeding, and the density was also measured with a reflection densitometer (Macbeth RD918). As a result, a high density with an OD value of 1.4 or more for each color could be obtained. Moreover, the recorded matter excellent also in the designability was obtained.

  On the other hand, the inkjet recorded matter of Comparative Example 1 produced by a method not according to the method of the present invention was not only blurred but also insufficient in density.

DESCRIPTION OF SYMBOLS 1 Fabric 2 Transparent ink recording 3 Ultraviolet irradiation 4 Color ink recording 5 Fabric moving direction 6 Ultraviolet irradiation apparatus 7 Transparent ink head 8 Yellow ultraviolet curing ink head 9 Magenta ultraviolet curing ink head 10 Cyan ultraviolet curing ink head 11 Black ultraviolet curing Type ink head 12 Head driving direction 13 Color ink layer 14 Transparent ink layer

Claims (4)

A method for ink jet recording onto a fabric using ultraviolet curable ink, a step of forming a three-dimensional pattern by repeating a step of applying a transparent ultraviolet curable ink and curing with ultraviolet rays, an ultraviolet curable type containing a coloring component ink is imparted, by Rukoto cured by ultraviolet rays, an ink jet recording method comprising the step of forming a three-dimensional image.   The transparent ultraviolet curable ink and the ultraviolet curable ink containing a coloring component are composed of a reactive oligomer, a reactive diluent, and a photopolymerization initiator, and the reactive oligomer is 1 to 1 in the transparent ultraviolet curable ink. 2. The ink jet recording method according to claim 1, wherein the ultraviolet curable ink containing 70% by weight and a coloring component is contained in an amount of 1 to 60% by weight. 3. The ink jet recording method according to claim 1, wherein each of the transparent ultraviolet curable ink and the ultraviolet curable ink containing a coloring component is heated by a heating device and then discharged. A method of manufacturing a fabric on which an image is printed, which includes a step of printing an image on a fabric by an inkjet recording method using an ultraviolet curable ink, wherein the step applies a transparent ultraviolet curable ink and cures by ultraviolet rays. Manufacturing a fabric printed with an image comprising a step of forming a three-dimensional pattern by repeating the step of forming a three-dimensional pattern and a step of forming a three-dimensional image by applying an ultraviolet curable ink containing a coloring component and curing it with ultraviolet light Method.

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