JP2014087996A - Ink jet printing device, ink jet printing method, and printed matter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form printed matter of different texture like sparkling feeling and shiny feeling for example on a recording medium.SOLUTION: An ink jet printing method includes a first image layer forming process in which ultraviolet curable type ink are discharged as liquid droplets to a recording medium and an ultraviolet ray is irradiated to the ultraviolet curable type ink coated over the recording medium, to form a first image layer having uneven parts, and a second image layer formation process in which solvent-type ink is discharged as droplets to the area other than the area in which the first image layer is formed in the recording medium and the solvent type ink coated on the recording medium is cured, to form a second image layer having flat parts.

Description

  The present invention relates to an inkjet printing apparatus, an inkjet printing method, and a printed matter.

  2. Description of the Related Art Conventionally, a printing apparatus including a print head that discharges solvent-based metallic ink and color ink as droplets is known (see, for example, Patent Document 1).

JP 2012-101492 A

  However, in the above printing apparatus, when the solvent-based ink is applied to a recording medium and the applied solvent-based ink is heated, the solvent component contained in the solvent-based ink evaporates. For this reason, there has been a problem that only an image layer having a flat surface can be formed.

  The present invention has been made to solve the above-described problems, and can be realized as the following forms or application examples.

  Application Example 1 An ink jet printing apparatus according to this application example includes an ink set including an ultraviolet curable ink and a solvent-based ink, a print head that discharges ink of the ink set as droplets, and an ultraviolet ray that irradiates ultraviolet rays. And an irradiation unit.

  According to this application example, the ultraviolet curable ink is ejected as droplets onto the recording medium, and the ultraviolet curable ink applied on the recording medium is irradiated with ultraviolet rays, whereby the ultraviolet curable ink is applied to the ultraviolet curable ink. An image layer having a concavo-convex portion can be formed on the recording medium with the pigment and the resin component as the colorant included. In this case, for example, an ultraviolet ray curable ink containing a glitter pigment is ejected, and the ink is cured, whereby an image layer having a glittering feeling can be formed on the recording medium by forming uneven portions. Further, the solvent-based ink is ejected as droplets onto the recording medium, and the applied solvent-based ink is dried to evaporate and solidify the solvent component contained in the solvent-based ink. It is possible to form an image layer having a flat portion. Note that the flat portion is an image layer having a flat surface as compared with the concavo-convex portion formed by the ultraviolet curable ink. Then, for example, by ejecting a solvent-based ink having a glitter pigment and solidifying the ink, an image layer having a shiny feeling can be formed by forming a flat portion on the recording medium. Accordingly, it is possible to form images having different textures including an image layer having an uneven portion and an image layer having a flat portion on the same recording medium. Thereby, an image with high designability can be formed. Note that the above-described glitter feeling is a state where there is a graininess on the recording medium, and it can be said that the glittering feeling is a state where there is no graininess on the recording medium.

  Application Example 2 The ink set of the ink jet printing apparatus according to the application example further includes an ultraviolet curable ink that does not include a pigment.

  According to this application example, an ultraviolet curable ink that does not contain a pigment as a colorant is ejected as droplets onto a recording medium, and the ultraviolet curable ink applied on the recording medium is irradiated with ultraviolet rays. Thus, a transparent image layer can be formed on the recording medium. Thus, for example, even when an image layer is formed with a solvent-based ink on a non-liquid-absorbing recording medium such as a plastic film, the image layer as an underlayer is reliably formed on the non-liquid-absorbing recording medium. Can be formed. Then, when solvent-based ink is applied onto the image layer, the applied solvent-based ink wets and spreads, and in this state, the solvent-based ink is solidified to form an image layer having a flat portion with a flat surface. Can do.

  Application Example 3 In the inkjet printing method according to this application example, ultraviolet curable ink is ejected as droplets toward a recording medium, and the ultraviolet curable ink applied on the recording medium is irradiated with ultraviolet rays. A first image layer forming step of forming a first image layer having a concavo-convex portion; and a solvent-based ink is ejected as droplets in a region other than the region where the first image layer is formed in the recording medium, and the recording medium And a second image layer forming step of solidifying the solvent-based ink applied thereon to form a second image layer having a flat portion.

  According to this application example, the ultraviolet curable ink is ejected as droplets onto the recording medium, and the ultraviolet curable ink applied on the recording medium is irradiated with ultraviolet rays, whereby the ultraviolet curable ink is applied to the ultraviolet curable ink. An image layer having a concavo-convex portion can be formed on the recording medium by the contained pigment and resin component. In this case, for example, an ultraviolet ray curable ink containing a glitter pigment is ejected, and the ink is cured, whereby an image layer having a glittering feeling can be formed on the recording medium by forming uneven portions. Furthermore, by ejecting solvent-based ink as droplets onto the recording medium and solidifying the applied solvent-based ink, the solvent component contained in the solvent-based ink is evaporated, and the surface is flat on the recording medium. An image layer having a flat portion can be formed. Note that the flat portion is an image layer having a flat surface compared to the concave and convex portion formed by the ultraviolet curable ink. Then, for example, by ejecting a solvent-based ink having a glitter pigment and solidifying the ink, an image layer having a shiny feeling can be formed by forming a flat portion on the recording medium. Accordingly, it is possible to form images having different textures including an image layer having an uneven portion and an image layer having a flat portion on the same recording medium. Thereby, an image with high designability can be formed. Note that the above-described glitter feeling is a state where there is a graininess on the recording medium, and it can be said that the glittering feeling is a state where there is no graininess on the recording medium.

  Application Example 4 In the ink jet printing method according to the application example, the second image layer forming process is performed after the first image layer forming process.

  According to this application example, wetting and spreading of the solvent-based ink ejected on the recording medium is regulated by the first image layer formed on the recording medium. Thereby, a printed matter with higher image quality can be formed.

  Application Example 5 In the ink jet printing method according to the application example, the ultraviolet curable ink is applied to a region other than the region where the first image layer is formed on the recording medium before the second image layer forming step. The method includes a base layer forming step of forming a base layer by irradiating the ultraviolet curable ink that is ejected as droplets and applied onto the recording medium with the ultraviolet rays.

  According to this application example, the base layer is formed on the recording medium with the ultraviolet curable ink, and the second image layer is formed on the base layer with the solvent-based ink. Thereby, for example, even if it is a non-liquid-absorbing recording medium such as PET, the underlayer can be reliably formed on the non-liquid-absorbing recording medium. When the solvent-based ink is applied on the underlayer, the solvent-based ink is wetted and spread on the underlayer, so that a second image layer having a flat portion with a flat surface can be formed. Furthermore, by providing a base layer, adhesion and abrasion resistance can be improved as compared with the case where a second image layer made of a solvent-based ink is laminated on a recording medium.

  Application Example 6 In the base layer forming step of the ink jet printing method according to the application example, the UV curable type containing no pigment in the region other than the region where the first image layer is formed on the recording medium. It is characterized by applying ink.

  According to this application example, the underlayer is formed by the ultraviolet curable ink that does not contain the pigment. That is, a transparent base layer is formed with clear ink. Therefore, the second image layer is formed on the underlayer, and there is no fear of color image due to the underlayer when the second image layer is viewed. Thereby, a high-quality image can be formed.

  Application Example 7 A printed material according to this application example includes a recording medium, a first image layer having a concavo-convex portion formed by ultraviolet curable ink on the recording medium, and the first image layer on the recording medium. And a second image layer having a flat portion formed by a solvent-based ink in a region other than the region where is formed.

  According to this application example, it is possible to provide a printed material having a different design and including a first image layer having uneven portions and a second image layer having flat portions on the recording medium. In this case, by using the ultraviolet curable ink for the first image layer, the uneven portion can be easily formed by the pigment and the resin component as the colorant contained in the ultraviolet curable ink. In addition, since the solvent component contained in the solvent-based ink is evaporated by using the solvent-based ink in the second image layer, an image layer having a flat portion with a flat surface can be formed on the recording medium. . The flat portion is an image layer having a flat surface as compared with the uneven portion formed by the ultraviolet curable ink.

  Application Example 8 A printed matter according to the application example described above is characterized in that a base layer formed of the ultraviolet curable ink is provided between the recording medium and the second image layer.

  According to this application example, for example, when the second image layer is made of a solvent-based ink, if the solvent-based ink is applied onto a non-liquid-absorbing recording medium such as a plastic film, the ink repels and gets wet on the recording medium. May not spread. Therefore, by forming a base layer made of ultraviolet curable ink, the second image layer made of solvent-based ink can be easily formed on the base layer. As a result, it is possible to provide a printed matter having a high design property having a different texture, including the first image layer having the uneven portion and the second image layer having the flat portion. Further, by providing a base layer between the recording medium and the second image layer, adhesion and abrasion resistance are improved as compared with the case where the second image layer made of solvent-based ink is laminated on the recording medium. be able to.

  Application Example 9 The printed layer according to the application example is characterized in that the base layer is formed of the ultraviolet curable ink that does not contain a pigment.

  According to this application example, the base layer having transparency is formed by the ultraviolet curable ink containing no pigment. Therefore, the second image layer is formed on the underlayer, and there is no fear of color image due to the underlayer when the second image layer is viewed. Thereby, a printed matter having a high-quality image can be provided.

1 is a schematic diagram illustrating a configuration of an inkjet printing apparatus. The schematic diagram which shows the structure of a head unit. FIG. 3 is a cross-sectional view illustrating a configuration of a print head. Process drawing which shows the inkjet printing method which concerns on 1st Embodiment. Process drawing which shows the inkjet printing method which concerns on 2nd Embodiment. Process drawing which shows the inkjet printing method which concerns on 3rd Embodiment. Process drawing which shows the inkjet printing method which concerns on 4th Embodiment.

  Hereinafter, first to fourth embodiments of the present invention will be described with reference to the drawings. In the following drawings, the scale of each layer and each member is shown different from the actual scale so that each layer and each member can be recognized.

(First embodiment)
First, the configuration of the ink jet printing apparatus will be described. FIG. 1 is a schematic diagram illustrating a configuration of an inkjet printing apparatus. The ink jet printing apparatus is an apparatus that includes an ink set including an ultraviolet curable ink and a solvent-based ink, a print head that ejects ink of the ink set as droplets, and an ultraviolet irradiation unit that irradiates ultraviolet rays. And the control part which drives and controls various members is provided. This will be specifically described below.

  As shown in FIG. 1, the ink jet printing apparatus 1 includes a base 2 formed in a rectangular parallelepiped shape. In the present embodiment, the longitudinal direction of the base 2 is the Y-axis direction, and the direction orthogonal to the Y-axis direction is the X-axis direction.

  On the upper surface 2a of the base 2, a pair of guide rails 3a and 3b extending in the Y direction is provided so as to protrude over the entire width in the Y axis direction. On the upper side of the base 2, a stage 4 provided with scanning means (not shown) corresponding to the pair of guide rails 3a and 3b is attached. The scanning unit is, for example, a linear motion mechanism, and the linear motion mechanism includes, for example, a screw shaft (drive shaft) extending in the Y direction along the guide rails 3a and 3b, and a ball nut screwed to the screw shaft. The screw type linear motion mechanism has a driving shaft connected to a Y-axis motor (not shown) that receives a predetermined pulse signal and rotates forward and backward in steps. When a drive signal corresponding to a predetermined number of steps is input to the Y-axis motor, the Y-axis motor rotates forward or reversely, and the stage 4 corresponds to the same number of steps along the Y-axis direction. The robot moves forward or backward (scans in the Y-axis direction) at a predetermined speed.

  On the upper surface of the stage 4, a placement surface 6 on which the recording medium 7 is placed is formed. In addition, for example, a suction type work chuck mechanism is provided on the mounting surface 6 so that the recording medium 7 is fixed at a predetermined position. The recording medium 7 may have a liquid absorbing property or a non-liquid absorbing property. For example, a plastic film (polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polycarbonate, etc. (PC), polyvinyl chloride (PVC), polyvinyl alcohol (PVA), etc.), various printing papers, cardboard, metal members (aluminum foil, copper foil, etc.) and the like. Further, for example, a coating layer such as a receiving layer may be formed on the surface (printing surface) of the recording medium 7. Furthermore, what laminated | stacked various plastic films may be used, and the vapor deposition film may be formed in the surface of the metal member.

  A pair of support bases 8a and 8b are erected on both sides of the base 2 in the X-axis direction, and a guide member 9 extending in the X-axis direction is installed on the pair of support bases 8a and 8b. The guide member 9 is formed longer than the width of the stage 4 in the X-axis direction. Under the guide member 9, a guide rail 10 extending in the X-axis direction is provided so as to protrude over the entire width in the X-axis direction.

  A head unit 20 including a carriage 12 that is movable along the guide rail 10 is disposed. The linear movement mechanism of the head unit 20 (carriage 12) is, for example, a screw-type linear mechanism including a screw shaft (drive shaft) extending in the X-axis direction along the guide rail 10 and a ball nut screwed to the screw shaft. A driving mechanism, the drive shaft of which is connected to an X-axis motor (not shown) that receives a predetermined pulse signal and rotates forward and backward in units of steps. When a drive signal corresponding to a predetermined number of steps is input to the X-axis motor, the X-axis motor rotates forward or reverse, and the head unit 20 moves forward along the X-axis direction by the amount corresponding to the same number of steps. Or, it moves backward (scans in the X-axis direction). A print head 14 is mounted on the carriage 12.

  The ink jet printing apparatus 1 is provided with an ink set 50 that supplies various inks to the print head 14. The ink set 50 includes an ultraviolet curable ink that is accelerated by ultraviolet irradiation, a solvent-based ink, and the like. The ultraviolet curable ink is an ink containing a pigment as a colorant and an ultraviolet curable resin component, and the solvent-based ink is an ink containing a solvent component such as water or an organic solvent in addition to the pigment or dye as a colorant. It is. Each of these inks is stored in the ink container 51. The plurality of ink containers 51 are stored in the storage holder 52. Each ink container 51 and the print head 14 corresponding to each ink container 51 are connected by a pipe 60 so that the ink in the ink container 51 can be supplied to the print head 14. The ink set 50 can include other inks in addition to the ultraviolet curable ink and the solvent-based ink. For example, any ink can be appropriately mounted depending on the type of the recording medium 7 and the image forming method. it can.

  Next, the configuration of the head unit will be described. FIG. 2 is a schematic diagram showing the configuration of the head unit. As shown in FIG. 2, the head unit 20 includes a print head 14 that ejects various inks mounted on the ink set 50 as droplets, and an ultraviolet irradiation unit 11 that irradiates ultraviolet rays. In the present embodiment, ultraviolet irradiation units 11a and 11b are disposed on both sides of the print head 14 (carriage 12) in the X-axis method, respectively. Each of the ultraviolet irradiation units 11a and 11b irradiates the mounting surface 6 (recording medium 7) of the stage 4 with ultraviolet rays. The ultraviolet irradiation units 11a and 11b have a light source that emits ultraviolet rays. As the light source, for example, various light sources such as LED, LD, mercury lamp, metal halide lamp, xenon lamp, and excimer lamp can be applied. The curing of the ultraviolet curable ink applied on the recording medium 7 can be promoted by the ultraviolet rays irradiated from the ultraviolet irradiation units 11a and 11b.

  Next, the configuration of the print head will be described. FIG. 3 is a cross-sectional view showing the configuration of the print head. As shown in FIG. 3, the print head 14 includes a nozzle plate 30. A nozzle 31 is formed on the nozzle plate 30. A cavity 32 communicating with the nozzle 31 is formed at a position above the nozzle plate 30 and facing the nozzle 31. Each ink is supplied from the ink set 50 to the cavity 32 of each print head 14.

  Above the cavity 32, a vibration plate 34 that vibrates in the vertical direction (Z direction: longitudinal vibration) and expands and contracts the volume in the cavity 32, and a pressurizing unit that expands and contracts in the vertical direction to vibrate the vibration plate 34. The piezoelectric element 35 is disposed. When the piezoelectric element 35 receives the drive signal, the piezoelectric element 35 expands and the diaphragm 34 reduces the volume in the cavity 32. As a result, the reduced volume of ink is ejected as droplets D from the nozzles 31 of the print head 14. In the present embodiment, the longitudinal vibration type piezoelectric element 35 is used as the pressurizing means. However, the present invention is not particularly limited to this, for example, a flexural deformation in which a lower electrode, a piezoelectric layer, and an upper electrode are stacked. A type of piezoelectric element may be used. Further, as the pressure generating means, a so-called electrostatic actuator that generates static electricity between the diaphragm and the electrode, deforms the diaphragm by electrostatic force, and discharges a droplet from the nozzle may be used. Furthermore, a print head having a configuration in which bubbles are generated in the nozzle using a heating element and ink is ejected as droplets by the bubbles may be used.

  Next, the ink jet printing method according to the present embodiment will be described. FIG. 4 is a process diagram illustrating the inkjet printing method according to the first embodiment. In the ink jet printing method of the present embodiment, the ultraviolet curable ink is ejected as droplets toward the recording medium, and the ultraviolet curable ink applied on the recording medium is irradiated with ultraviolet rays to form a first image layer having an uneven portion. A first image layer forming step for forming a liquid crystal, and a solvent-based ink is ejected as droplets in a region other than the region where the first image layer is formed on the recording medium, and the solvent-based ink applied on the recording medium is solidified. And a second image layer forming step of forming a second image layer having a flat portion. Moreover, it is an inkjet printing method which performs a 2nd image layer formation process after a 1st image layer formation process. This will be specifically described below.

  In the ink jet printing method of the present embodiment, a case where the ink jet printing apparatus 1 is used will be described. The ink set 50 of the inkjet printing apparatus 1 includes an ultraviolet curable metallic ink as an ultraviolet curable ink for forming the first image layer and a solvent-based ink as a solvent-based ink for forming the second image layer. A case where metallic ink is mounted will be described. Further, a case where printing is performed on the recording medium 7 having liquid absorption properties will be described.

  First, the first image forming process will be described. As shown in FIG. 4A, first, an ultraviolet curable metallic ink is applied to a predetermined area Ar1 on the recording medium 7. Specifically, the ultraviolet curable metallic ink is ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and the ink dots 110 a of the ultraviolet curable metallic ink are deposited on the recording medium 7.

  Next, the ink dots 110a are irradiated with ultraviolet rays. Specifically, ultraviolet rays are irradiated from the ultraviolet irradiation units 11a and 11b. In addition, the ultraviolet curable metallic ink can be ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and ultraviolet rays can be irradiated from the ultraviolet irradiation units 11a and 11b. In this case, ultraviolet rays are irradiated from the ultraviolet irradiation units 11 a and 11 b on the downstream side of the print head 14 in the moving direction of the print head 14. Thus, the ink dots 110a ejected from the print head 14 and applied to the recording medium 7 are irradiated with ultraviolet rays, and the ink dots 110a can be cured efficiently. Thereby, an uneven shape can be easily formed. Specifically, for example, when the droplet D is ejected while moving the print head 14 in the plus X-axis direction, the ultraviolet irradiation unit 11a is driven, and conversely, the print head 14 is moved in the minus X-axis direction. In the case where the droplets D are ejected while being driven, the ultraviolet irradiation unit 11b is driven. Curing of the ink dots 110a is promoted by the irradiation of ultraviolet rays, and as shown in FIG. 4B, the first image layer 200 having the uneven portions 101 is formed by the pigment and the resin component contained in the ultraviolet curable metallic ink. .

  Next, the second image forming process will be described. As shown in FIG. 4C, solvent-based ink is applied to the area Ar2 other than the area Ar1 where the first image layer 200 is formed on the recording medium 7. Specifically, the solvent-based metallic ink is ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and the solvent-based metallic ink 120 a is applied onto the recording medium 7. The solvent-based metallic ink 120a applied on the recording medium 7 wets and spreads in the area Ar2 defined by the first image layer 200.

  Next, the solvent-based metallic ink 120a applied on the recording medium 7 is solidified by heating or the like. The solvent component contained in the solvent-based metallic ink 120a applied by heating or the like evaporates, and as shown in FIG. 4D, the second image layer 300 having the flat portion 151 is formed. In detail, the second image layer 300 is an image layer having a flat surface compared to the first image layer 200. Accordingly, the recording medium 7, the first image layer 200 having the concavo-convex portion 101 formed on the recording medium 7 by the ultraviolet curable metallic ink, and the area Ar1 where the first image layer 200 is formed on the recording medium 7. The printed matter 1000 including the second image layer 300 having the flat portion 151 formed of the solvent-based metallic ink in the region Ar2 other than the region Ar2 is formed.

  As described above, according to the present embodiment, the following effects can be obtained.

  By discharging ultraviolet curable metallic ink on the recording medium 7 and curing the ink, the first image layer 200 having the uneven portion 101 on the recording medium 7 and having a glittering feeling is formed. Further, by ejecting a solvent-based metallic ink on the recording medium 7 and solidifying the ink, the second image layer 300 having the flat portion 151 on the recording medium 7 and having a shiny feeling is formed. Accordingly, it is possible to form the printed material 1000 having different textures including the first image layer 200 having the uneven portion 101 and the second image layer 300 having the flat portion 151 on the same recording medium 7.

  In the first embodiment, the ultraviolet curable metallic ink is used as the ultraviolet curable ink. However, the present invention is not limited to this. For example, the ultraviolet curable color ink may be used as the ultraviolet curable ink. Further, although the solvent-based metallic ink is used as the solvent-based ink, the present invention is not limited to this, and for example, a solvent-based color ink may be used as the solvent-based ink. However, these inks may be combined. In the above case, the desired ink may be mounted on the ink set 50 and the print head 14 corresponding to each ink may be provided. In this way, it is possible to form a printed material 1000 rich in color variations.

  In the first embodiment, the second image layer forming step is performed after the first image layer forming step. However, the present invention is not limited to this. For example, the first image layer forming step may be performed after the second image layer forming step. Even if it does in this way, the effect similar to the said effect can be acquired.

(Second Embodiment)
Next, a second embodiment will be described. In addition, since the structure of the inkjet printing apparatus 1 is the same as that of 1st Embodiment, it abbreviate | omits description and demonstrates the inkjet printing method. FIG. 5 is a process diagram illustrating an inkjet printing method according to the second embodiment. In the inkjet printing method, the inkjet printing apparatus 1 is used, and the ink set 50 of the inkjet printing apparatus 1 includes an ultraviolet curable metallic ink as an ultraviolet curable ink for forming the first image layer, and A case will be described in which a UV-curable color ink, a solvent-based metallic ink as a solvent-based ink for forming the second image layer, and a solvent-based color ink are mounted. For example, yellow, cyan, magenta, black, and the like are applied as the color of the ultraviolet curable color ink and the solvent-based color ink. Further, in the present embodiment, a case where printing is performed on the recording medium 7 having liquid absorbency as in the first embodiment will be described.

  First, the first image forming process will be described. As shown in FIG. 5A, first, ultraviolet curable metallic ink is applied to a predetermined area Ar1 on the recording medium 7. Specifically, the ultraviolet curable metallic ink is ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and the ink dots 110 a of the ultraviolet curable metallic ink are deposited on the recording medium 7.

  Next, the ink dots 110a are irradiated with ultraviolet rays. Specifically, ultraviolet rays are irradiated from the ultraviolet irradiation units 11a and 11b. In addition, the ultraviolet curable metallic ink can be ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and ultraviolet rays can be irradiated from the ultraviolet irradiation units 11a and 11b. In this case, ultraviolet rays are irradiated from the ultraviolet irradiation units 11 a and 11 b on the downstream side of the print head 14 in the moving direction of the print head 14. Thus, the ink dots 110a ejected from the print head 14 and applied to the recording medium 7 are irradiated with ultraviolet rays, and the ink dots 110a can be cured efficiently. Specifically, for example, when the droplet D is ejected while moving the print head 14 in the plus X-axis direction, the ultraviolet irradiation unit 11a is driven, and conversely, the print head 14 is moved in the minus X-axis direction. In the case where the droplets D are ejected while being driven, the ultraviolet irradiation unit 11b is driven. Curing of the ink dots 110a is promoted by the irradiation of ultraviolet rays, and as shown in FIG. 5B, the image layer 110 having the concavo-convex portions 101 is formed by the pigment and the resin component contained in the ultraviolet curable metallic ink.

  Next, as shown in FIG. 5C, the ultraviolet curable color ink is applied on the image layer 110 formed of the ultraviolet curable metallic ink. Specifically, the ultraviolet curable color ink is ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and the ink dots 111 a of the external line curable color ink are adhered on the image layer 110.

  Next, the ink dots 111a are irradiated with ultraviolet rays. Specifically, ultraviolet rays are irradiated from the ultraviolet irradiation units 11a and 11b. As shown in FIG. 5B, the ultraviolet curable color ink is ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and ultraviolet rays are emitted from the ultraviolet irradiation units 11a and 11b. Can be irradiated. Curing of the ink dots 111a is promoted by the irradiation of ultraviolet rays, and as shown in FIG. 5D, uneven portions are formed on the image layer 110 made of the ultraviolet curable metallic ink by pigments and resin components contained in the ultraviolet curable color ink. A first image layer 200 having an image layer 111 having 102 is formed.

  Next, the second image forming process will be described. As shown in FIG. 5E, solvent-based ink is applied to the area Ar2 other than the area Ar1 where the first image layer 200 is formed on the recording medium 7. Specifically, the solvent-based metallic ink is ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and the solvent-based metallic ink 120 a is applied onto the recording medium 7. The solvent-based metallic ink 120a applied on the recording medium 7 wets and spreads in the area Ar2 defined by the first image layer 200.

  Next, the solvent-based metallic ink 120a applied on the recording medium 7 is solidified by heating or the like. The solvent component contained in the solvent-based metallic ink 120a applied by heating or the like evaporates, and as shown in FIG. 5F, the image layer 120 having the flat portion 151 is formed.

  Next, as shown in FIG. 5G, solvent-based ink is applied on the image layer 120 made of solvent-based metallic ink. Specifically, the solvent-based color ink is ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and the solvent-based color ink 121 a is applied onto the image layer 120. The solvent-based color ink 121a applied on the image layer 120 is an area Ar2 defined by the first image layer 200 and spreads on the image layer 120.

  Next, the solvent-based color ink 121a applied on the image layer 120 is solidified by heating or the like. The solvent component contained in the solvent-based color ink 121a applied by heating or the like evaporates, and as shown in FIG. 5H, an image layer 121 having a flat portion 152 is formed. Thereby, the second image layer 300 having the image layer 120 made of solvent-based metallic ink and the image layer 121 made of solvent-based color ink is formed. In detail, the second image layer 300 is an image layer having a flat surface compared to the first image layer 200. Then, the recording medium 7, the first image layer 200 having the concavo-convex portion 102 formed on the recording medium 7 by the ultraviolet curable metallic ink and the ultraviolet curable color ink, and the first image layer 200 on the recording medium 7 are provided. A printed material 1100 is formed that includes a second image layer 300 having a flat portion 152 formed of a solvent-based metallic ink and a solvent-based color ink in a region Ar2 other than the formed region Ar1.

  As described above, according to the present embodiment, in addition to the effects of the first embodiment, the following effects can be obtained.

  A first image layer 200 having a concavo-convex portion 102 in which an image layer 110 made of an ultraviolet curable metallic ink and an image layer 111 made of an ultraviolet curable color ink are laminated, an image layer 120 made of a solvent-based metallic ink, and a solvent system. A printed material 1100 including the second image layer 300 having the flat portion 152 on which the image layer 121 made of color ink is laminated is formed. As a result, it is possible to easily form a printed material 1100 including a color metallic and rich in color variations.

  In the second embodiment, the first image layer 200 is formed by laminating the image layer 110 made of ultraviolet curable metallic ink and the image layer 111 made of ultraviolet curable color ink. However, the present invention is not limited to this configuration. Not. The first image layer 200 may be, for example, only the image layer 110 made of ultraviolet curable metallic ink, or only the image layer 111 made of ultraviolet curable color ink. Even if it does in this way, the effect similar to said effect can be acquired.

  In the second embodiment, the second image layer 300 is formed by laminating the image layer 120 made of solvent-based metallic ink and the image layer 121 made of solvent-based color ink. However, the present invention is not limited to this configuration. The second image layer 300 may be, for example, only the image layer 120 made of solvent-based metallic ink or only the image layer 121 made of solvent-based color ink. Even if it does in this way, the effect similar to said effect can be acquired.

  In the second embodiment, the first image layer 200 has the configuration of the first image layer 200 in which the image layer 111 made of ultraviolet curable color ink is formed on the image layer 110 made of ultraviolet curable metallic ink. However, it is not limited to this. For example, it may be the first image layer 200 in which the image layer 110 made of ultraviolet curable metallic ink is formed on the image layer 111 made of ultraviolet curable color ink. Even if it does in this way, the effect similar to the said effect can be acquired.

  In the second embodiment, the second image layer 300 has the configuration of the second image layer 300 in which the image layer 121 made of solvent-based color ink is formed on the image layer 120 made of solvent-based metallic ink. However, it is not limited to this. For example, the second image layer 300 in which the image layer 120 made of solvent-based metallic ink is formed on the image layer 121 made of solvent-based color ink may be used. Even if it does in this way, the effect similar to the said effect can be acquired.

  In the second embodiment, the second image layer forming step is performed after the first image layer forming step. However, the present invention is not limited to this. For example, the first image layer forming step may be performed after the second image layer forming step. Even if it does in this way, the effect similar to the said effect can be acquired.

(Third embodiment)
Next, a third embodiment will be described. In addition, since the structure of the inkjet printing apparatus 1 is the same as that of 1st Embodiment, it abbreviate | omits description and demonstrates the inkjet printing method. FIG. 6 is a process diagram illustrating an inkjet printing method according to the third embodiment. In the ink jet printing method of the present embodiment, before the second image layer forming step, the ultraviolet curable ink is ejected as droplets in a region other than the region where the first image layer is formed on the recording medium, and the ink is printed on the recording medium. The method includes an underlayer forming step of forming an underlayer by irradiating the applied ultraviolet curable ink with ultraviolet rays. In the underlayer forming process of the present embodiment, ultraviolet curable ink that does not contain a pigment is applied to a region other than the region where the first image layer is formed on the recording medium. This will be specifically described below.

  In the inkjet printing method of this embodiment, the case where the inkjet printing apparatus 1 is used will be described. The ink set 50 of the inkjet printing apparatus 1 includes an ultraviolet curable metallic ink as an ultraviolet curable ink for forming the first image layer and a solvent-based ink as a solvent-based ink for forming the second image layer. A case will be described in which an ultraviolet curable ink (ultraviolet curable clear ink) that does not include a metallic ink and a pigment for forming a base layer is mounted. In the present embodiment, unlike the first and second embodiments, a case where printing is performed on a non-liquid-absorbing recording medium 7 will be described.

  First, the first image forming process will be described. As shown in FIG. 6A, first, ultraviolet curable metallic ink is applied to a predetermined area Ar1 on the recording medium 7. Specifically, the ultraviolet curable metallic ink is ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and the ink dots 110 a of the ultraviolet curable metallic ink are deposited on the recording medium 7.

  Next, the ink dots 110a are irradiated with ultraviolet rays. Specifically, ultraviolet rays are irradiated from the ultraviolet irradiation units 11a and 11b. In addition, the ultraviolet curable metallic ink can be ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and ultraviolet rays can be irradiated from the ultraviolet irradiation units 11a and 11b. In this case, ultraviolet rays are irradiated from the ultraviolet irradiation units 11 a and 11 b on the downstream side of the print head 14 in the moving direction of the print head 14. Thus, the ink dots 110a ejected from the print head 14 and applied to the recording medium 7 are irradiated with ultraviolet rays, and the ink dots 110a can be cured efficiently. Specifically, for example, when the droplet D is ejected while moving the print head 14 in the plus X-axis direction, the ultraviolet irradiation unit 11a is driven, and conversely, the print head 14 is moved in the minus X-axis direction. In the case where the droplets D are ejected while being driven, the ultraviolet irradiation unit 11b is driven. Curing of the ink dots 110a is promoted by the irradiation of ultraviolet rays, and as shown in FIG. 6B, the first image layer 200 having the concavo-convex portions 101 is formed by the pigment and the resin component contained in the ultraviolet curable metallic ink. .

  Next, the underlayer forming process will be described. As shown in FIG. 6C, the ultraviolet curable clear ink 130a is applied to the region Ar2 other than the region Ar1 where the first image layer 200 is formed on the recording medium 7. Specifically, the ultraviolet curable clear ink is ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and the ultraviolet curable clear ink 130 a is applied onto the recording medium 7. The ultraviolet curable clear ink 130 a applied on the recording medium 7 spreads in the area Ar <b> 2 defined by the first image layer 200.

  Next, the applied ultraviolet curable clear ink 130a is irradiated with ultraviolet rays. Specifically, ultraviolet rays are irradiated from the ultraviolet irradiation units 11a and 11b. At this time, the ultraviolet curable clear ink can be ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and ultraviolet rays can be irradiated from the ultraviolet irradiation units 11a and 11b. Curing of the ultraviolet curable clear ink 130a is promoted by the irradiation of ultraviolet rays, and as shown in FIG. 6D, a transparent base layer 130 made of the ultraviolet curable clear ink is formed.

  Next, the second image forming process will be described. As shown in FIG. 6E, solvent-based ink is applied on the base layer 130. Specifically, the solvent-based metallic ink is ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and the solvent-based metallic ink 120 a is applied onto the base layer 130. At this time, the solvent-based metallic ink 120 a applied on the underlayer 130 wets and spreads over the surface of the underlayer 130.

  Next, the solvent-based metallic ink 120a applied on the underlayer 130 is solidified by heating or the like. The solvent component contained in the solvent-based metallic ink 120a applied by heating or the like evaporates, and as shown in FIG. 6F, the second image layer 300 having the flat portion 151 is formed. In detail, the second image layer 300 is an image layer having a flat surface compared to the first image layer 200. Accordingly, the recording medium 7, the first image layer 200 having the concavo-convex portion 101 formed on the recording medium 7 by the ultraviolet curable metallic ink, and the area Ar1 where the first image layer 200 is formed on the recording medium 7. The second image layer 300 having a flat portion 151 formed of a solvent-based metallic ink in a region Ar2 other than the region, and an ultraviolet curable ink (ultraviolet curable ink) that does not contain a pigment between the recording medium 7 and the second image layer 300. A printed matter 1200 including a transparent base layer 130 formed of a clear ink is formed.

  As described above, according to the present embodiment, in addition to the effects of the first and second embodiments, the following effects can be obtained.

  A base layer 130 was formed on the non-liquid-absorbing recording medium 7, and a second image layer 300 was formed on the base layer 130. As a result, the solvent-based metallic ink that is the material of the second image layer 300 can be wetted and spread on the base layer 130 without causing the second image layer 300 to be formed reliably. In addition, since the underlayer 130 is formed from an ultraviolet curable clear ink that does not contain a pigment, it is formed without flipping the surface of the recording medium 7. Thereby, the second image layer 300 having the flat portion 151 can be formed on the base layer 130. Further, by interposing the base layer 130 between the recording medium 7 and the second image layer 300, the adhesion between the second image layer 300 and the recording medium 7 can be improved and the abrasion resistance can be improved. Can be improved.

  In the third embodiment, the ultraviolet curable metallic ink is used as the ultraviolet curable ink. However, the present invention is not limited to this. For example, the ultraviolet curable color ink may be used as the ultraviolet curable ink. Further, although the solvent-based metallic ink is used as the solvent-based ink, the present invention is not limited to this, and for example, a solvent-based color ink may be used as the solvent-based ink. Further, these inks may be combined. In the above case, the desired ink may be mounted on the ink set 50 and the print head 14 corresponding to each ink may be provided. In this way, it is possible to form a printed material 1200 rich in color.

(Fourth embodiment)
Next, a fourth embodiment will be described. In addition, since the structure of the inkjet printing apparatus 1 is the same as that of 1st Embodiment, it abbreviate | omits description and demonstrates the inkjet printing method. FIG. 7 is a process diagram illustrating an inkjet printing method according to the fourth embodiment. In the inkjet printing method, the inkjet printing apparatus 1 is used, and the ink set 50 of the inkjet printing apparatus 1 includes an ultraviolet curable metallic ink as an ultraviolet curable ink for forming the first image layer, and When UV-curable color ink and solvent-based metallic ink as solvent-based ink for forming the second image layer and solvent-based color ink and UV-curable clear ink not containing pigment for forming the underlayer are mounted Will be described. Color, yellow, cyan, magenta, black, and the like are applied as the ultraviolet curable color ink and the solvent-based color ink. In the present embodiment, a case will be described in which printing is performed on a recording medium 7 having non-liquid absorbency as in the third embodiment.

  First, the first image forming process will be described. As shown in FIG. 7A, first, ultraviolet curable metallic ink is applied to a predetermined area Ar1 on the recording medium 7. Specifically, the ultraviolet curable metallic ink is ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and the ink dots 110 a of the ultraviolet curable metallic ink are deposited on the recording medium 7.

  Next, the ink dots 110a are irradiated with ultraviolet rays. Specifically, ultraviolet rays are irradiated from the ultraviolet irradiation units 11a and 11b. In addition, the ultraviolet curable metallic ink can be ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and ultraviolet rays can be irradiated from the ultraviolet irradiation units 11a and 11b. In this case, ultraviolet rays are irradiated from the ultraviolet irradiation units 11 a and 11 b on the downstream side of the print head 14 in the moving direction of the print head 14. Thus, the ink dots 110a ejected from the print head 14 and applied to the recording medium 7 are irradiated with ultraviolet rays, and the ink dots 110a can be cured efficiently. Specifically, for example, when the droplet D is ejected while moving the print head 14 in the plus X-axis direction, the ultraviolet irradiation unit 11a is driven, and conversely, the print head 14 is moved in the minus X-axis direction. In the case where the droplets D are ejected while being driven, the ultraviolet irradiation unit 11b is driven. Curing of the ink dots 110a is promoted by the irradiation of ultraviolet rays, and as shown in FIG. 7B, the image layer 110 having the concavo-convex portions 101 is formed by the pigment and the resin component contained in the ultraviolet curable metallic ink.

  Next, as shown in FIG. 7C, the ultraviolet curable color ink is applied on the image layer 110 formed of the ultraviolet curable metallic ink. Specifically, the ultraviolet curable color ink is ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and the ink dots 111 a of the external line curable color ink are adhered on the image layer 110.

  Next, the ink dots 111a are irradiated with ultraviolet rays. Specifically, ultraviolet rays are irradiated from the ultraviolet irradiation units 11a and 11b. As shown in FIG. 7B, the UV curable color ink is ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and ultraviolet rays are emitted from the ultraviolet irradiation units 11a and 11b. Can be irradiated. Curing of the ink dots 111a is promoted by the irradiation of ultraviolet rays, and as shown in FIG. 7 (d), uneven portions are formed on the image layer 110 made of ultraviolet curable metallic ink by pigments and resin components contained in the ultraviolet curable color ink. A first image layer 200 having an image layer 111 having 102 is formed.

  Next, the underlayer forming process will be described. As shown in FIG. 7E, the ultraviolet curable clear ink 130a is applied to the region Ar2 other than the region Ar1 where the first image layer 200 is formed on the recording medium 7. Specifically, the ultraviolet curable clear ink is ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and the ultraviolet curable clear ink 130 a is applied onto the recording medium 7. The ultraviolet curable clear ink 130 a applied on the recording medium 7 spreads in the area Ar <b> 2 defined by the first image layer 200.

  Next, the applied ultraviolet curable clear ink 130a is irradiated with ultraviolet rays. Specifically, ultraviolet rays are irradiated from the ultraviolet irradiation units 11a and 11b. At this time, the ultraviolet curable clear ink can be ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and ultraviolet rays can be irradiated from the ultraviolet irradiation units 11a and 11b. Curing of the ultraviolet curable clear ink 130a is promoted by the irradiation of ultraviolet rays, and as shown in FIG. 7 (f), a transparent base layer 130 made of the ultraviolet curable clear ink is formed.

  Next, the second image forming process will be described. As shown in FIG. 7G, solvent-based ink is applied on the base layer 130. Specifically, the solvent-based metallic ink is ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and the solvent-based metallic ink 120 a is applied onto the base layer 130. The solvent-based metallic ink 120a applied on the underlayer 130 is an area Ar2 defined by the first image layer 200, and spreads wet on the underlayer 130.

  Next, the solvent-based metallic ink 120a applied on the underlayer 130 is solidified by heating or the like. The solvent component contained in the solvent-based metallic ink 120a applied by heating or the like evaporates, and as shown in FIG. 7H, the image layer 120 having the flat portion 151 is formed.

  Next, as shown in FIG. 7I, a solvent-based ink is applied on the image layer 120 made of the solvent-based metallic ink. Specifically, the solvent-based color ink is ejected as droplets D while the print head 14 is reciprocated along the X-axis direction, and the solvent-based color ink 121 a is applied onto the image layer 120. The solvent-based color ink 121a applied on the image layer 120 is an area Ar2 defined by the first image layer 200 and spreads on the image layer 120.

  Next, the solvent-based color ink 121a applied on the image layer 120 is solidified by heating or the like. The solvent component contained in the solvent-based color ink 121a applied by heating or the like evaporates, and as shown in FIG. 7J, an image layer 121 having a flat portion 152 is formed. Thereby, the second image layer 300 having the image layer 120 and the image layer 121 is formed. In detail, the second image layer 300 is an image layer having a flat surface compared to the first image layer 200. Then, the recording medium 7, the first image layer 200 having the concavo-convex portion 102 formed on the recording medium 7 by the ultraviolet curable metallic ink and the ultraviolet curable color ink, and the first image layer 200 on the recording medium 7 are provided. A pigment is applied between the recording medium 7 and the second image layer 300, and the second image layer 300 having the flat portion 152 formed by the solvent-based metallic ink and the solvent-based color ink in the region Ar2 other than the formed region Ar1. A printed material 1300 is formed that includes a transparent underlayer 130 formed of an ultraviolet curable ink (UV curable clear ink) that is not included.

  As described above, according to the present embodiment, in addition to the effects of the first to third embodiments, the following effects can be obtained.

  A first image layer 200 having a concavo-convex portion 102 in which an image layer 110 made of an ultraviolet curable metallic ink and an image layer 111 made of an ultraviolet curable color ink are laminated, an image layer 120 made of a solvent-based metallic ink, and a solvent system. A printed material 1300 including the second image layer 300 having the flat portion 152 on which the image layer 121 made of color ink is laminated is formed. Thereby, it is possible to easily form a printed material 1300 containing a color metallic and rich in color variations with respect to the non-liquid-absorbing recording medium 7.

  In the second embodiment, the first image layer 200 is formed by laminating the image layer 110 made of ultraviolet curable metallic ink and the image layer 111 made of ultraviolet curable color ink. However, the present invention is not limited to this configuration. Not. The first image layer 200 may be, for example, only the image layer 110 made of ultraviolet curable metallic ink, or only the image layer 111 made of ultraviolet curable color ink. Even if it does in this way, the effect similar to said effect can be acquired.

  In the second embodiment, the second image layer 300 is formed by laminating the image layer 120 made of solvent-based metallic ink and the image layer 121 made of solvent-based color ink. However, the present invention is not limited to this configuration. The second image layer 300 may be, for example, only the image layer 120 made of solvent-based metallic ink or only the image layer 121 made of solvent-based color ink. Even if it does in this way, the effect similar to said effect can be acquired.

  In the second embodiment, the first image layer 200 has the configuration of the first image layer 200 in which the image layer 111 made of ultraviolet curable color ink is formed on the image layer 110 made of ultraviolet curable metallic ink. However, it is not limited to this. For example, it may be the first image layer 200 in which the image layer 110 made of ultraviolet curable metallic ink is formed on the image layer 111 made of ultraviolet curable color ink. Even if it does in this way, the effect similar to the said effect can be acquired.

  DESCRIPTION OF SYMBOLS 1 ... Inkjet printing apparatus, 7 ... Recording medium, 11, 11a, 11b ... Ultraviolet irradiation part, 14 ... Print head, 50 ... Ink set, 101, 102 ... Uneven part, 110, 111, 120, 121 ... Image layer, 130 ... Underlayer, 150, 151, 152 ... Flat part, 200 ... First image layer, 300 ... Second image layer, 1000, 1100, 1200, 1300 ... Printed matter.

Claims (9)

An ink set comprising ultraviolet curable ink and solvent-based ink;
A print head that ejects ink of the ink set as droplets;
An inkjet printing apparatus comprising: an ultraviolet irradiation unit that emits ultraviolet rays. The inkjet printing apparatus according to claim 1,
The ink set is
Furthermore, the inkjet printing apparatus characterized by including the ultraviolet curable ink which does not contain a pigment. A first image layer that discharges ultraviolet curable ink as droplets toward a recording medium and irradiates the ultraviolet curable ink applied on the recording medium with ultraviolet rays to form a first image layer having a concavo-convex portion. Forming process;
A solvent-based ink is ejected as droplets in a region other than the region where the first image layer is formed on the recording medium, and the solvent-based ink applied on the recording medium is solidified to have a flat portion. A second image layer forming step of forming an image layer. The inkjet printing method according to claim 3, wherein
An inkjet printing method, wherein the second image layer forming step is performed after the first image layer forming step. In the ink jet printing method according to claim 3 or 4,
Before the second image layer forming step,
The ultraviolet curable ink is ejected as droplets in a region other than the region where the first image layer is formed on the recording medium, and the ultraviolet curable ink applied on the recording medium is irradiated with the ultraviolet rays. An ink-jet printing method comprising a foundation layer forming step of forming a foundation layer. The inkjet printing method according to claim 5, wherein
In the underlayer forming step,
An inkjet printing method, wherein the ultraviolet curable ink containing no pigment is applied to the region other than the region where the first image layer is formed on the recording medium. A recording medium;
A first image layer having a concavo-convex portion formed by ultraviolet curable ink on the recording medium;
And a second image layer having a flat portion formed by a solvent-based ink in a region other than the region where the first image layer is formed on the recording medium. The printed matter according to claim 7,
A printed matter comprising an underlayer formed of the ultraviolet curable ink between the recording medium and the second image layer. The printed matter according to claim 8,
The printed matter, wherein the underlayer is formed of the ultraviolet curable ink containing no pigment.

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