JP6585965B2 - Combination of ink-jet ink and ink composition, and method for forming printed matter - Google Patents

Description

The present invention relates to a combination of an inkjet ink and an ink composition , and a method for forming a printed product.

  As printing methods used for image formation, printing methods such as a thermal melting transfer method, an ink jet method, a gravure printing method, a screen printing method, and an offset printing method are widely known. Among them, the hot melt transfer method and the ink jet method are both plateless printing methods, and their use tends to be preferred because they can cope with the formation of small lots and variable images. The thermal melt transfer method is a method in which a thermal transfer sheet in which a thermal melt ink layer containing a colorant component such as a pigment and a dye and a binder resin is provided on a substrate is overlapped with a transfer target, and the rear surface of the thermal transfer sheet. This is a printing method in which energy corresponding to image information is applied from the side by a heating means such as a thermal head to transfer the color material components together with a binder resin onto the transfer target, forming an image with high density and excellent sharpness. It has the advantage that it can. The ink jet method is a printing method in which ink for ink jet is ejected from a nozzle by a pressure wave generated by piezo drive and adhered onto a transfer target, and has an advantage that a full color image can be easily formed.

  By the way, while the ink jet method has an advantage that a full color image can be easily formed, the viscosity of the ink cannot be increased due to the property of the printing method in which the ink is ejected from the nozzle to form an image. It is not suitable for image formation. Therefore, by forming a thick film image, in other words, by increasing the amount of light absorption, the formation of an image using fluorescent ink or polarized / color-changing ink can be achieved by using an inkjet. The method is not suitable, and screen printing that requires a stencil is generally used. On the other hand, the hot melt transfer method is suitable for thick film image formation, but is not suitable for image formation using fluorescent ink or polarized / color-changing ink because heat is applied during image formation.

  Under such circumstances, there has been proposed an image forming method in which the disadvantages of one printing method are compensated by other printing methods. For example, Patent Document 1 proposes an image forming method in which a colored layer formed by inkjet printing and a concealing layer formed by thermal ribbon printing are overlapped to form a design layer. According to this method, it is said that the disadvantage of ink jet printing that cannot be printed in white can be compensated by thermal ribbon printing.

JP 2006-297757 A

  However, in an image forming method that combines an inkjet method and another printing method, printability when forming an image using another printing method on an image formed by the inkjet method, or other printing Printability when forming an image using an inkjet method on an image formed using a method, and adhesion between an image formed using an inkjet method and an image formed using another printing method There is still room for improvement.

  The present invention has been made in view of such a situation, and uses a inkjet method and a hot-melt transfer method to form a printed material that can form a printed material with high design and functionality. The main object is to provide a print formed by this method.

The present invention for solving the above-described problems is a method for forming a printed matter in which a printing layer is provided on a substrate, and includes a step of forming the printing layer on the substrate, and the printing layer is formed. The process includes a step of forming an ink jet printing layer by an ink jet method and a step of forming a heat melt printing layer by a heat melting transfer method using a heat transfer sheet provided with a heat melting ink layer, before and after the step of forming the ink jet printing layer. A step of forming the printed layer, and in the step of forming the printed layer, the printed layer is formed such that the inkjet printed layer and the hot-melt printed layer are in contact with each other at least partially, The inkjet ink used and the hot melt ink layer of the thermal transfer sheet used in the hot melt transfer system are both nitrocellulose resin and chloride. Either the nil-vinyl acetate copolymer resin, or characterized by containing both.
In the above method for forming a printed matter, the inkjet ink may contain a nitrocellulose resin, and the hot-melt ink layer may contain a vinyl chloride / vinyl acetate copolymer resin.
Moreover, this invention for solving the said subject of the said ink for inkjet used for formation of the said inkjet printing layer of the formation method of said printed matter, and the ink composition used for formation of the said hot-melt ink layer. A combination of the ink-jet ink used for forming the ink-jet printing layer and the ink composition used for forming the hot-melt ink layer are both a nitrocellulose resin and a vinyl chloride vinyl acetate copolymer resin. Either or both of these are contained.

  According to the method for forming a printed matter of the present invention, it is possible to form a printed matter with high designability and functionality by using an ink jet method and a thermal melting transfer method. Moreover, according to the printed matter of the present invention, the designability and functionality of the printed matter can be improved.

It is a schematic sectional drawing which shows an example of the formation method of the printed matter of one Embodiment. It is a schematic sectional drawing which shows an example of the formation method of the printed matter of one Embodiment. It is a schematic sectional drawing which shows an example of the formation method of the printed matter of one Embodiment. It is a schematic sectional drawing which shows an example of the formation method of the printed matter of one Embodiment. It is a schematic sectional drawing which shows an example of the formation method of the printed matter of one Embodiment. It is a schematic sectional drawing which shows an example of the formation method of the printed matter of one Embodiment. It is a schematic sectional drawing which shows an example of the printed matter formed by the formation method of the printed matter of one Embodiment. It is a schematic sectional drawing which shows an example of the thermal transfer sheet used for the formation method of the printed matter of one Embodiment.

<< Method for forming printed matter >>
Hereinafter, a method for forming a printed material according to an embodiment of the present invention (hereinafter referred to as a forming method according to an embodiment) will be described. The forming method of one embodiment is a method for forming a printed matter including a step of forming a printed layer on a substrate, and the step of forming the printed layer includes a step of forming an inkjet printed layer by an inkjet method, and an inkjet Before and after the step of forming the print layer, a step of forming a hot melt print layer by a hot melt transfer method using a heat transfer sheet provided with a hot melt ink layer is included. Moreover, in the formation method of one Embodiment, formation of a printing layer is performed so that an inkjet printing layer and a hot-melt-printing layer may contact | connect at least one part. And the formation method of one Embodiment is the ink for inkjet used when forming an inkjet printing layer by an inkjet system, and the hot-melt ink of the thermal transfer sheet used when forming a hot-melt printing layer by a thermal melt transfer system Both layers are characterized by containing a hydrophobic resin.

  According to the method for forming a printed matter according to an embodiment having the above characteristics, printability when forming an ink jet printing layer by an ink jet method, and when forming a heat melt printing layer by a heat melt transfer method using a heat transfer sheet. The printability of the can be made good. Specifically, as shown in FIG. 1A, an ink jet printing layer 3A is formed on the substrate 1 by an ink jet method, and as shown in FIG. 1B, the surface of the ink jet printing layer 3A is formed. Printability when forming the hot melt printing layer 3B by the hot melt transfer method so as to be in contact with a part, or hot melt printing by the hot melt transfer method on the substrate 1 as shown in FIG. The layer 3B is formed, and as shown in FIG. 2B, the printability when the ink jet printing layer 3A is formed by the ink jet method so as to be in contact with a part of the surface of the hot melt printing layer 3B is good. can do. In addition, the adhesion between the ink jet printing layer 3A and the hot melt printing layer 3B can be improved. 1 and 2 are schematic cross-sectional views for explaining a forming method according to an embodiment.

  In addition, when either one of the inkjet ink and the heat-melting ink layer of the thermal transfer sheet contains a hydrophobic resin and the other does not contain the hydrophobic resin, the ink layer is in contact with the previously formed printing layer. Thus, the printability when the next print layer is formed cannot be satisfied. For example, when only the hot-melt ink layer contains a hydrophobic resin and the ink-jet ink does not contain a hydrophobic resin, a hot-melt printing layer is formed by the hot-melt transfer method, and this hot-melt printing is performed. When an ink jet printing layer is formed by an ink jet method so as to be in contact with a part of the surface of the layer, ink jet ink for forming the ink jet printing layer is repelled at the contact position, and the surface quality of the ink jet printing layer Or the ink-jet print layer is formed in spots at the contact position. In addition, the adhesion between the ink jet printing layer and the hot melt printing layer is low. The same can be said for the case where only the inkjet ink contains a hydrophobic resin and the hot melt printing layer does not contain a hydrophobic resin.

  Hereinafter, an example is given and the process of forming a printing layer is demonstrated more concretely.

<Process for forming a printing layer>
This process is a process of forming the printing layer 3 on the base material 1 as shown in FIGS. The printing layer 3 referred to in the present specification includes an ink jet printing layer 3A and a hot melt printing layer 3B. That is, the forming method of one embodiment includes a step of forming the ink jet printing layer 3A and a step of forming the hot melt printing layer 3B.

  There is no limitation on the order of forming the ink jet printing layer 3A and the hot melt printing layer 3B, and the ink jet printing layer 3A may be formed before the hot melt printing layer 3B is formed (see FIG. 1). Before forming, the hot-melt printing layer 3B may be formed (see FIG. 2). Further, as shown in FIG. 3, the formation of the ink jet printing layer 3A and the hot melt printing layer 3B may be repeated. In addition, in the form formed repeatedly, the formation order of the ink jet printing layer 3A and the hot melt printing layer 3B is not limited to the order shown in FIG. 3, and can be arbitrarily determined. Further, as shown in FIG. 4, an inkjet printing layer 3 </ b> A or a hot melt printing layer 3 </ b> B is formed on the same surface of the substrate 1 with a predetermined interval (in FIG. 4A, hot melt printing). Layer 3B) and cover at least a part of the surface of the printed layer (in the form shown, cover the entire surface of the printed layer and the exposed substrate 1) and heat melt The print layer 3B or the inkjet print layer 3A may be formed (in FIG. 4B, the inkjet print layer 3A is formed).

  In the form shown in FIG. 1 to FIG. 4, each printing layer is formed so that the ink jet printing layer 3 </ b> A and the hot-melt printing layer 3 </ b> B are in contact with each other in the thickness direction. Each printed layer may be formed so that 3A and the hot melt printed layer 3B are in contact with each other in the width direction. For example, as shown in FIG. 5 (a), a hot-melt printed layer 3B is formed on the same surface of the substrate 1 with a predetermined interval, and thereafter, as shown in FIG. The printed product 10 may be obtained by forming the ink jet printing layer 3A between the matching hot melt printing layers 3B. Further, as shown in FIG. 6 (a), the surface is formed with a hot melt printing layer 3B having a concave portion, and as shown in FIG. 6 (b), ink jet printing is performed on the concave portion of the hot melt printing layer 3B. In other words, the printed matter 10 may be obtained by forming the layer 3A, in other words, filling the recess with ink jet ink to form the ink jet printing layer 3A.

(Base material)
There is no particular limitation on the substrate used in the forming method of one embodiment, and natural fiber paper, coated paper such as titanium-coated paper, synthetic paper, tracing paper, glass, metal, ceramics, resin film, etc. are appropriately selected. Can be used. Examples of the resin film include films composed of polyethylene terephthalate (PET), acrylic, acrylonitrile / butadiene / styrene copolymer (ABS), polyvinyl chloride, polyethylene, polypropylene, polyvinyl alcohol, polyester, polycarbonate, and the like. Can do. Moreover, the base material in which the receiving layer was provided in the surface can also be used.

  There is no limitation in particular about the thickness of a base material, and the range of 1 micrometer or more and 500 micrometers or less is common.

"Inkjet system"
The ink jet method is a printing method in which ink jet ink is ejected from a nozzle to form an ink jet printing layer 3A. For example, ink jet ink is ejected from a nozzle by a pressure wave generated by piezo driving, and transferred. The ink jet printing layer 3A can be formed by adhering to a body (in the illustrated form, the base material 1 or the hot melt printing layer 3B).

(Ink-jet ink)
The ink-jet ink used for the ink-jet method to form the ink-jet printing layer 3A contains a color material component, a resin component, and a solvent component. And the formation method of one Embodiment is characterized by the inkjet ink containing hydrophobic resin as a resin component.

  As the hydrophobic resin, conventionally known ones can be appropriately selected and used. For example, vinyl resins such as polyvinyl chloride, polyvinyl acetate, polyacrylate, polyvinyl butyral, polyvinyl acetal, and copolymers thereof. Resins, polyethylene terephthalate, polybutylene terephthalate, and polyester resins such as copolymerized polyester copolymerized with a modifying component, polyamide resins, phenoxy resins, copolymers of olefins such as ethylene and propylene and other vinyl monomers, Examples thereof include single polymers or mixtures of polymers that are soluble in organic solvents such as polycarbonate, acrylic resin, ionomer, and cellulose derivatives. The ink for inkjet may contain 1 type as a hydrophobic resin, and may contain 2 or more types.

  The ink jet ink of a preferable form contains any one or both of a vinyl chloride-vinyl acetate copolymer resin and a nitrocellulose resin as a hydrophobic resin. According to the ink jet ink of a preferred form, it is possible to further improve the printability when forming the ink jet print layer 3A using the ink and the adhesion with the hot melt print layer 3B.

  Moreover, the ink for inkjet may contain resin other than hydrophobic resin in the range which does not deviate from the meaning of this invention. For example, the content of the hydrophobic resin with respect to the total mass of all binder resin components including the hydrophobic resin is preferably more than 50% by mass. There is no limitation in particular about an upper limit, and it is 100 mass%.

  There is no limitation on the color material component contained in the inkjet ink, and conventionally known dyes and pigments can be appropriately selected and used. Examples of the dye include diarylmethane dyes, triarylmethane dyes, thiazole dyes, merocyanine dyes, pyrazolone dyes, methine dyes, indoaniline dyes, acetophenone azomethine, pyrazoloazomethine, imidazolazomethine, imidazoazomethine, Azomethine dyes such as pyridone azomethine, xanthene dyes, oxazine dyes, cyanostyrene dyes such as dicyanostyrene and tricyanostyrene, thiazine dyes, azine dyes, acridine dyes, benzeneazo dyes, pyridoneazo, thiophenazo, Azo dyes such as isothiazole azo, pyrrole azo, pyrazole azo, imidazole azo, thiadiazole azo, triazole azo, disazo, spiropyran dyes, indolino spiropyran dyes, fluores Oran-based dyes, mention may be made of rhodamine lactam-based dyes, naphthoquinone dyes, anthraquinone dye, a quinophthalone dye and the like.

  Examples of the pigment include organic pigments such as azo pigments, quinophthalone pigments, and phthalocyanine pigments, and carbon black. The ink for inkjet may contain only 1 type of these color material components, and may contain 2 or more types.

  Ink jet ink may contain a brilliant pigment such as a pearl pigment or a metallic pigment as a colorant component. However, these highly brilliant pigments have a particle size as compared with organic pigments and dyes. Large and easy to clog the nozzle. Therefore, it is preferable that the ink-jet ink contains a dye other than these highly bright pigments or a pigment. As will be described later, by adding a high luster pigment in the hot-melt ink layer 22 of the thermal transfer sheet 20 (see FIG. 8), the hot-melt printing layer 3B formed by the hot-melt printing method has a design property. Can be granted.

  Further, as the color material component, a fluorescent agent that does not emit light under visible light but emits light under specific invisible light can be used. Examples of the fluorescent agent include a red coloring fluorescent agent, a green coloring fluorescent agent, and a blue coloring fluorescent agent. As the fluorescent agent, a commercially available product may be used as it is. For example, as a red coloring fluorescent agent, LC-0001 manufactured by Nippon Kayaku Co., Ltd., as a green coloring fluorescent agent, EG-502 manufactured by Mitsui Chemicals, Inc., blue coloring Examples of the fluorescent agent include Ubitex OB manufactured by Ciba Geigy.

  In addition, when forming the inkjet printing layer 3A using an inkjet ink containing a fluorescent agent as a color material component, if the inkjet printing layer 3A is thickened and the amount of light absorption is not increased, The effect cannot be fully exhibited. In addition, in general, it is difficult to form a thick print layer in the inkjet method, but in the formation method of one embodiment, an inkjet ink for forming the inkjet print layer 3A, Since both the hot-melt ink layer for forming the hot-melt printing layer 3B contains a hydrophobic resin, various means for thickening the ink-jet printing layer 3A can be taken. For example, the thickness of the inkjet printing layer 3A can be increased by adopting the forms shown in FIGS. In addition, the thickness of the thick inkjet printing layer 3A said here means the thickness of 0.3 micrometer or more.

  The solvent component contained in the inkjet ink is not particularly limited, and may be an aqueous solvent such as water or isopropyl alcohol, or an organic solvent such as methyl ethyl ketone or toluene. In particular, a component referred to as “fourth class second petroleum group” can be preferably used.

  Moreover, in the ink for inkjet, the said dye and pigment may exist in the state melt | dissolved by the solvent component, and may exist in the disperse | distributed state.

  Moreover, the ink for inkjet may contain arbitrary components other than this, for example, a dispersing agent, etc. with the said color material component, hydrophobic resin, and a solvent.

"Thermal transfer method"
In the heat-melt transfer method, a heat transfer sheet having a heat-melt ink layer containing a color material component and a binder resin is overlapped with a transfer target, and image information is heated from the back side of the heat transfer sheet by a heating means such as a thermal head. This is a printing method in which the energy corresponding to is applied and the color material component is transferred together with the binder onto the transfer target.

(Thermal transfer sheet)
As shown in FIG. 8, the thermal transfer sheet 20 used in the thermal melt transfer system includes a thermal transfer sheet base material 21 and a hot melt ink layer 22 provided on the thermal transfer sheet base material.

(Base material for thermal transfer sheet)
There is no limitation in particular about the base material 21 for thermal transfer sheets, A conventionally well-known base material can be suitably selected and used in the field | area of a thermal transfer sheet. Examples of the thermal transfer sheet substrate 21 include polyethylene terephthalate film, 1,4-polycyclohexylenedimethylene terephthalate film, polyethylene naphthalate film, polyphenylene sulfide film, polystyrene film, polypropylene film, polysulfone film, aramid film, and polycarbonate. Films, polyvinyl alcohol films, cellophane, cellulose derivatives such as cellulose acetate, polyethylene films, polyvinyl chloride films, nylon films, polyimide films, resin films such as ionomer films; papers such as condenser paper, paraffin paper, synthetic paper; non-woven fabrics A composite of paper or non-woven fabric and resin, and the like. Each of these materials can be used alone, but may be used as a laminate in combination with other materials.

(Hot-melt ink layer)
The hot-melt ink layer 22 used for the hot-melt transfer system and for forming the hot-melt printing layer 3B contains a color material component and a binder resin. And the formation method of one Embodiment is characterized by the hot-melt ink layer 22 containing hydrophobic resin as binder resin.

  The color material component contained in the heat-melt ink layer 22 is not particularly limited, and a known color material component can be appropriately selected and used in the heat-melt ink layer of the heat transfer sheet used in the heat-melt transfer method. For example, what was demonstrated as a coloring material component of the said inkjet ink can be used.

  As the hydrophobic resin contained in the hot-melt ink layer 22, the hydrophobic resin described in the ink-jet ink can be used as it is, and detailed description thereof is omitted here. From the viewpoint of printability, the hot-melt ink layer 22 preferably also contains one or both of a vinyl chloride-vinyl acetate copolymer resin and a nitrocellulose resin as a hydrophobic resin. Moreover, the hot-melt ink layer 22 may contain 1 type as a hydrophobic resin, and may contain 2 or more types.

  The method for forming the hot-melt ink layer 22 is not particularly limited, and the hot-melt ink layer obtained by dissolving or dispersing the color material component, the hydrophobic resin, and any component added as necessary in an appropriate solvent. It can be formed by preparing a coating liquid for coating and applying and drying it on the substrate 21 for thermal transfer sheet. Although there is no limitation in particular about the thickness of the hot-melt ink layer 22, the range of 0.1 micrometer or more and 10 micrometers or less is common.

(Optional process)
In the formation method of one embodiment, a step of forming an arbitrary print layer may be performed before or after the step of forming the print layer 3 on the substrate 1. The printing method in the step of forming an arbitrary print layer is not limited to the ink jet method or the hot melt transfer method. For example, the forming method of one embodiment may include a step of forming various functional layers on the ink jet printing layer 3A or the hot melt printing layer 3B in the form shown in FIGS. Good. Examples of the functional layer generally include layers referred to as a receiving layer, a hard coat layer, and an adhesive layer.

  Moreover, you may form various functional layers on the surface on the opposite side to the surface on the side which forms the printing layer 3 of the base material 1. FIG.

<< Printed matter >>
Next, a printed matter according to one embodiment of the present invention (hereinafter referred to as a printed matter according to one embodiment) will be described. The printed product 10 of one embodiment is shown in each figure (see FIG. 1B, FIG. 2B, FIG. 3C, FIG. 4B, FIG. 5B, and FIG. 6B). As shown, the printing layer 3 is provided on the substrate 1, and the printing layer 3 provided on the substrate 1 includes the inkjet printing layer 3A formed by the inkjet method and the heat formed by the hot melt transfer method. A melt-printed layer 3B is included, and the ink-jet print layer 3A is at least partially in contact with the heat-melt print layer 3B, and both the ink-jet print layer 3A and the heat-melt print layer 3B contain a hydrophobic resin. It is characterized by being.

  According to the printed matter of one embodiment, the designability and functionality can be improved by the synergistic effect of the inkjet printing layer 3 </ b> A based on the inkjet system and the hot melt printing layer 3 </ b> B based on the thermal melt transfer system. For example, an image using a pearl pigment, metal powder, or the like, which is not suitable for an ink jet method, as a color material component is formed by a hot melt transfer method, a full color image is formed by an ink jet method, and this is combined, It can be set as a printed matter having high design properties. Further, instead of improving the design, for example, a variable information image as the ink jet printing layer 3A is formed by the ink jet method, while a security image as the heat melt printing layer 3B is formed by the heat melting transfer method. Thus, the functionality of the printed product can be enhanced. Moreover, in the printed material of one Embodiment, the adhesiveness of 3 A of inkjet printing layers and the hot-melt-printing layer 3B can be made high.

  The printed matter 10 of one embodiment corresponds to the printed matter formed by the forming method of the one embodiment described above, and detailed description thereof is omitted here. For example, in a preferred form of the printed matter, both the ink jet printing layer 3A and the hot melt printing layer 3B both contain either or both of a nitrocellulose resin and a vinyl chloride vinyl acetate copolymer resin as a hydrophobic resin. is doing.

  In addition, as shown in FIGS. 5 and 6, the printed product 10 as an example is provided with the hot-melt printed layer 3 </ b> B provided on the same surface of the substrate 1 with a predetermined interval, or the surface thereof. In the former case, the ink jet printing layer 3A is provided between the adjacent hot-melt printing layers 3B. In the latter case, the ink jet printing layer 3A is provided in the recess. According to the printed matter of this form, it is possible to increase the thickness of the ink jet printing layer 3A, which has been considered difficult in the past. There is no limitation in particular about the thickness of the hot-melt-printing layer 3B which forms a recessed part, It can set to arbitrary thickness. In addition, as shown in FIGS. 7A to 7C, the thickness of the hot-melt printing layer 3B is changed to the hot-melt ink layer 22 of the thermal transfer sheet (see FIG. 8) by overprinting the hot-melt printing layer 3B. It can also be thicker than

  FIG. 7 is a schematic cross-sectional view showing an example of a printed material showing a state in which the heat-melt printing layer 3B is thickened by overprinting the heat-melt printing layer. In FIG. The position of the end face in the width direction of the melt-printed layer 3B ′ and the end face in the width direction of the hot-melt print layer 3B ″ and the hot-melt print layer 3B ′ ″ overprinted on the hot-melt print layer 3B ′ Are printed in this order on the hot-melt printed layer 3B ′ so that the two coincide with each other. Further, in FIG. 7B, the heat-melt printed layer 3B ′ is positioned such that the end surface in the width direction of the heat-melt printed layer 3B ″ is located on the inner peripheral side of the end surface in the width direction of the heat-melt printed layer 3B ′. The hot-melt printed layer 3B ″ is overprinted on the upper side, and the end surface in the width direction of the hot-melt printed layer 3B ′ ″ is located on the inner peripheral side of the end surface in the width direction of the hot-melt printed layer 3B ″. In this manner, the hot-melt printing layer 3B ′ ″ is overprinted on the hot-melt printing layer 3B ″. Further, in FIG. 7C, the hot-melt printing layer 3B ″ is overprinted so as to cover the widthwise end surface and the upper surface of the hot-melt printing layer 3B ′. The hot-melt printing layer 3B ′ ″ is overprinted so as to cover the end surface in the width direction and the upper surface.

  As described above, by increasing the thickness of the inkjet printing layer 3A, the weather resistance and concentration of the inkjet printing layer 3A can be improved. Moreover, even when forming the inkjet printing layer 3A using fluorescent ink etc., the effect can fully be exhibited by thickening the inkjet printing layer 3A. Moreover, a high aspect ratio can be achieved.

  Hereinafter, in order to verify the superiority of the printed matter of the present invention, the printed matter was formed by the following method.

Example 1A
An inkjet printing layer was formed on a substrate by an inkjet method using an inkjet ink (1) containing a hydrophobic resin (nitrocellulose resin), a pigment, and a solvent. Next, thermal fusion transfer using a thermal transfer sheet (1) provided with a thermal melt ink layer containing a hydrophobic resin (vinyl chloride-vinyl acetate copolymer resin) and carbon black on a substrate for thermal transfer sheet. According to the method, a thermal melt printing layer was formed on the ink jet printing layer, and a printed material of Example 1A in which a base material, an ink jet printing layer, and a hot melt printing layer were laminated in this order was obtained.

(Example 1B)
Using the thermal transfer sheet (1), a hot-melt printing layer is formed on a substrate by a hot-melt transfer method, and the inkjet ink (1) is used on the hot-melt printing layer by an ink-jet method. A print layer was formed, and a printed material of Example 1B in which a base material, a hot-melt print layer, and an inkjet print layer were laminated in this order was obtained.

(Comparative Example 1A)
The same procedure as in Example 1A was conducted except that the inkjet printing layer was formed using inkjet ink (2) (Seiko Epson Corporation ICBK series) containing a hydrophilic resin instead of inkjet ink (1). Thus, a printed material of Comparative Example 1A in which the base material, the ink jet printing layer, and the hot melt printing layer were laminated in this order was obtained.

(Comparative Example 1B)
The same procedure as in Example 1B was performed except that the inkjet printing layer was formed using inkjet ink (2) containing a hydrophilic resin (ICBK series manufactured by Seiko Epson Corporation) instead of inkjet ink (1). Thus, a printed material of Comparative Example 1B in which the base material, the hot-melt printing layer, and the inkjet printing layer were laminated in this order was obtained.

(Comparative Example 2A)
Instead of the thermal transfer sheet (1), a thermal transfer sheet (2) provided with a thermal melt printing layer containing a hydrophilic resin (water-based acrylic resin) and carbon black on a thermal transfer sheet substrate is used. A printed material of Comparative Example 2A was obtained in which the base material, the ink jet printing layer, and the hot melt printing layer were laminated in this order in the same manner as in Example 1A except that the melt printing layer was formed.

(Comparative Example 2B)
Instead of the thermal transfer sheet (1), a thermal transfer sheet (2) provided with a thermal melt printing layer containing a hydrophilic resin (water-based acrylic resin) and carbon black on a thermal transfer sheet substrate is used. A printed material of Comparative Example 2B was obtained in which the base material, the hot-melt printing layer, and the inkjet printing layer were laminated in this order, all in the same manner as Example 1B, except that the melt-printed layer was formed.

When the formed prints of Examples and Comparative Examples were evaluated, the following evaluations were obtained.
Example 1A: The hot melt printing layer could be transferred onto the ink jet printing layer without any problem, and the adhesion between the ink jet printing layer and the hot melt printing layer was also good.
Example 1B: The ink jet printing layer could be fixed on the hot melt printing layer without any problem.
Comparative Example 1A: Although the hot melt print layer could be transferred onto the ink jet print layer, the adhesion was insufficient and the hot melt print layer was peeled off by rubbing by hand.
Comparative Example 1B: The ink jet printing layer could not be fixed on the hot melt printing layer, and when the ink jet printing layer was touched by hand, the ink of the ink jet printing layer adhered to the hand.
Comparative Example 2A: Although the hot melt printing layer could be transferred onto the ink jet printing layer, the transferability was low, and the density was low compared to the printed material of Example 1A.
Comparative Example 2B: The ink jet printing layer could be fixed on the hot melt printing layer, but the adhesion was lower than that of the print of Example 1B, and the ink jet printing layer was easily peeled off by the tape. .

  From the above results, in the printed matter in which the inkjet printing layer and the hot melt printing layer are overprinted, the superiority of the present invention in which the inkjet printing layer and the hot melt printing layer both contain a hydrophobic resin is clear. It became.

DESCRIPTION OF SYMBOLS 1 ... Base material 3 ... Print layer 3A ... Inkjet print layer 3B ... Thermal fusion print layer 10 ... Printed matter 20 ... Thermal transfer sheet 21 ... Base material 22 for thermal transfer sheets ..Hot-melt ink layer

Claims (3)

  A method for forming a printed matter in which a printed layer is provided on a substrate,
  Including a step of forming a printed layer on the substrate;
  The step of forming the print layer is a thermal melt transfer method using a thermal transfer sheet provided with a hot melt ink layer before and after the step of forming the ink jet print layer by the ink jet method and the step of forming the ink jet print layer. A step of forming a hot melt printing layer, and in the step of forming the printing layer, the printing layer is formed such that the ink jet printing layer and the hot melt printing layer are at least partially in contact with each other. I,
  The inkjet ink used in the inkjet system and the thermal melt ink layer of the thermal transfer sheet used in the thermal melt transfer system are both nitrocellulose resin, vinyl chloride vinyl acetate copolymer resin, or both. A method for forming a printed material, comprising:   The method for forming a printed matter according to claim 1, wherein the inkjet ink contains a nitrocellulose resin, and the hot-melt ink layer contains a vinyl chloride / vinyl acetate copolymer resin.   A combination of the ink-jet ink used for forming the ink-jet printing layer of the method for forming a printed matter according to claim 1 and an ink composition used for forming the hot-melt ink layer,
  The ink for ink jet used for forming the ink jet printing layer and the ink composition used for forming the hot melt ink layer are both nitrocellulose resins and vinyl chloride vinyl acetate copolymer resins, Or the combination of the ink for inkjets and an ink composition containing both.

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