JP5776236B2 - Printed matter and method for producing printed matter - Google Patents

Description

  The present invention relates to a printed material and a method for producing the printed material.

For example, a printed matter such as an interior part of an automobile or an exterior part of an electrical product has a base material and a printed layer formed by printing on the base material using ink. For example, an opening is formed in the printed matter by a shearing process such as punching or cutting, or a deformation process such as a process of extending a part such as a drawing process or a bending process is performed ( For example, see Patent Document 1). As the ink, radiation curable ink such as ultraviolet curable ink is used.
By the way, there is a problem that ink suitable for shearing is not suitable for deformation, and ink suitable for deformation is not suitable for shearing.

JP 2009-96043 A

Therefore, the first printing layer is formed using the first ink suitable for the deformation process at the part to be deformed, and the second ink suitable for the shear process is used at the part to be sheared. By forming the second print layer, the above problem can be solved.
However, when it is desired to make the first printed layer and the second printed layer have the same color, the same amount of face is applied to the first ink for the first printed layer and the second ink for the second printed layer. Even if it is used, since the polymerizable compound is different between the first ink and the second ink, a color difference occurs between the first printed layer and the second printed layer. If this color difference is very small and the first print layer and the second print layer are separated by a predetermined distance or more, even if the first print layer and the second print layer look the same color, When the print layer and the second print layer are in contact with or close to each other, there is a drawback that the first print layer and the second print layer appear to have different colors. Further, the boundary between the first print layer and the second print layer is noticeable like a streak, and the quality is remarkably lowered.
An object of the present invention is to provide a printed material and a method for producing the printed material, in which the first printed layer and the second printed layer having a color difference can be seen in the same color.

Such an object is achieved by the present invention described below.
The printed matter of the present invention comprises a substrate,
A first printing layer that is provided in different regions on the substrate, has different characteristics or functions, and has a color difference, and is printed using the first ink, and printing using the second ink A second printed layer comprising:
A third printing layer provided so as to cover or fill a boundary between the first printing layer and the second printing layer and forming a mixed region containing the first ink and the second ink; It is characterized by having.
Thereby, the 1st printing layer and 2nd printing layer which have a color difference can be made to show the same color.

In the printed matter of the present invention, the third print layer includes a plurality of first pixels printed using the first ink and a plurality of second pixels printed using the second ink. It is preferable to have this pixel.
Thereby, the 1st printing layer and 2nd printing layer which have a color difference can be made to show the same color more reliably.

In the printed matter of the present invention, it is preferable that the first pixel and the second pixel are regularly arranged in the third print layer.
Thereby, the 1st printing layer and 2nd printing layer which have a color difference can be made to show the same color more reliably.
In the printed matter of the present invention, it is preferable that the first pixel and the second pixel are irregularly arranged in the third print layer.
Thereby, the 1st printing layer and 2nd printing layer which have a color difference can be made to show the same color more reliably.

In the printed matter according to the aspect of the invention, it is preferable that the ratio between the first pixel and the second pixel is changed from the first print layer toward the second print layer.
Thereby, the boundary between the first print layer and the second print layer can be made inconspicuous.
In the printed matter of the present invention, it is preferable that the ratio of the first pixels in the third printed layer decreases from the first printed layer toward the second printed layer.
Thereby, the boundary between the first print layer and the second print layer can be made inconspicuous.
In the printed matter of the present invention, it is preferable that the ratio of the second pixels in the third print layer increases from the first print layer toward the second print layer.
Thereby, the boundary between the first print layer and the second print layer can be made inconspicuous.

In the printed matter of the present invention, the width of the third print layer is preferably 0.35 mm or more.
Thereby, the first printed layer and the second printed layer can be separated from each other by 0.35 mm or more, and the first printed layer and the second printed layer having a color difference can be more surely displayed in the same color. it can.
In the printed matter of the present invention, it is preferable that the color difference when measured with a chromaticity meter between the first printed layer and the second printed layer is 2 or less.
Thereby, the 1st printing layer and 2nd printing layer which have a color difference can be made to show the same color more reliably.

In the printed matter of the present invention, the first printed layer and the second printed layer are arranged apart from each other,
It is preferable that the third print layer is provided so as to fill a gap between the first print layer and the second print layer.
Thereby, a 1st printing layer, a 2nd printing layer, and a 3rd printing layer can be provided, without providing a level | step difference.

In the printed matter of the present invention, the base material has a first processing region to be deformed,
The first ink layer is preferably provided in the first processing region.
Thereby, a 1st process area | region can be deformed reliably.
In the printed matter of the present invention, it is preferable that the deformation process is performed.
Thereby, the printed matter in which the first processing region is reliably deformed can be provided.

In the printed matter of the present invention, the base material has a second processing region to be sheared,
The second ink layer is preferably provided in the second processing region.
Thereby, the second processing region can be reliably sheared.
In the printed matter of the present invention, it is preferable that the shearing process is performed.
Thereby, the printed matter in which the second processing region is reliably sheared can be provided.
In the printed matter of the present invention, the characteristic is preferably a physical characteristic or a chemical characteristic.
Thereby, the printed matter which has the 1st printing layer and the 2nd printing layer from which a physical characteristic and a chemical characteristic mutually differ can be provided.

In the printed matter of the present invention, the first printed layer is formed by ejecting and applying the first ink as a droplet from a nozzle by an inkjet method.
The second printed layer is formed by ejecting and applying the second ink as droplets from a nozzle by an inkjet method,
It is preferable that the third printed layer is formed by ejecting and applying the first ink and the second ink as droplets from a nozzle by an inkjet method.
Thereby, the printed matter which has the 1st printed layer, the 2nd printed layer, and the 3rd printed layer formed accurately can be provided.

In the printed matter of the present invention, each of the first ink, the second ink, and the third ink is a radiation curable ink,
The first printed layer is obtained by ejecting and applying the first ink as a droplet from a nozzle by an inkjet method, and irradiating and curing the radiation.
The second printed layer is obtained by ejecting and applying the second ink as droplets from a nozzle by an ink jet method, and curing by irradiation with radiation.
It is preferable that the third printed layer is formed by ejecting and applying the first ink and the second ink as droplets from a nozzle by an inkjet method, and irradiating with radiation.
Thereby, the printed matter which has the 1st printed layer, the 2nd printed layer, and the 3rd printed layer formed accurately can be provided.

The method for producing a printed material according to the present invention includes a first printed layer formed of the first ink and a second printed layer formed of the second ink, having different characteristics or functions and having a color difference. A third printed layer forming a mixed region containing the first ink and the second ink, and the first printed layer and the second printed layer in different regions on the substrate It is arrange | positioned and it prints so that the said 3rd printing layer may cover or fill the boundary of the said 1st printing layer and the said 2nd printing layer.
Thereby, the printed matter of the present invention can be easily and reliably manufactured.

It is sectional drawing which shows 1st Embodiment of the printed matter of this invention. It is a top view which shows the 1st printing layer of the printed matter shown in FIG. 1, a 2nd printing layer, and a 3rd printing layer. It is a perspective view which shows schematic structure of the printing apparatus used for manufacture of the printed matter of this invention. FIG. 4 is a side sectional view showing a schematic configuration of a carriage of the printing apparatus shown in FIG. 3. FIG. 4 is a bottom view illustrating a schematic configuration of a carriage of the printing apparatus illustrated in FIG. 3. It is a schematic block diagram of a droplet discharge head. It is a top view showing the 1st printing layer in the 2nd embodiment of the printed matter of the present invention, the 2nd printing layer, and the 3rd printing layer.

Hereinafter, the printed matter and the method for producing the printed matter of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.
<First Embodiment>
FIG. 1 is a cross-sectional view showing a first embodiment of a printed matter of the present invention. FIG. 1 (a) shows a state before performing deformation processing and shearing processing, and FIG. Shown after shearing. 2 is a plan view showing the first printed layer, the second printed layer, and the third printed layer of the printed matter shown in FIG. 1, and FIG. 3 is a schematic configuration of a printing apparatus used for producing the printed matter of the present invention. 4 is a side sectional view showing a schematic configuration of the carriage of the printing apparatus shown in FIG. 3, FIG. 5 is a bottom view showing the schematic configuration of the carriage of the printing apparatus shown in FIG. 3, and FIG. It is a schematic block diagram of a droplet discharge head.
In the following, the left side in FIG. 1 is “left”, the right side is “right”, the upper side is “upper”, the lower side is “lower”, the left side in FIG. 2 is “left”, and the right side is “right”. Give an explanation. In FIG. 2, each pixel is illustrated in a large size for easy understanding.

As shown in FIG. 1 and FIG. 2, the printed matter 1 is a first ink that is provided in a base material (substrate) 30 and different regions on the base material 30, has different characteristics or functions, and has a color difference. The first print layer 31 printed (formed) using the second print layer 32, the second print layer 32 printed using the second ink, the first print layer 31 and the second print layer 32. And a third printing layer 33 that forms a mixed region including the first ink and the second ink.
First, the first ink and the second ink, that is, the ink set will be described.

[Ink set]
The ink set that can be used for the production of the printed matter 1, that is, printing, is not particularly limited, but is a radiation curable ink containing (a-1) a polymerization initiator and (b-1) a polymerizable compound. 1 ink, and (a-2) a polymerization initiator and (b-2) a second ink which is a radiation curable ink containing a polymerizable compound. A 1st ink is an ink used for formation (printing) of the 1st printing layer 31, and a monofunctional polymeric compound is 65 mass% or more among the total mass of (b-1) polymeric compound. Is preferred. The second ink is an ink used for forming the second printed layer 31, and (b-2) the polyfunctional polymerizable compound is 50% by mass or more of the total mass of the polymerizable compound. preferable. Hereinafter, when the first ink and the second ink are not distinguished from each other, they are simply referred to as “ink” or “radiation curable ink”.
The ink set can be suitably used as an ink set for ink jet recording.

The radiation curable ink is required to be cured with high sensitivity in order to form a high-quality image.
By achieving high sensitivity of the ink, high curability is imparted by irradiation with actinic radiation. Therefore, in addition to reducing power consumption and extending the life by reducing the load on the actinic radiation generator, uncured low It has various advantages such as the ability to suppress the volatilization of the molecular substance and the decrease in the intensity of the formed image. In addition, there is a need for an ink that is resistant to cracking and peeling of the obtained image (printed material), and has excellent scratch resistance and flexibility of a cured film. Since the cured film has high flexibility and scratch resistance, the printed material can be displayed and stored with high image quality for a long time under various environments, and the printed material can be easily handled.

The first ink contains (a-1) a polymerization initiator and (b-1) a polymerizable compound, and (b-1) a monofunctional polymerizable compound out of the total mass of the polymerizable compound ( Hereinafter, it is also referred to as “monofunctional monomer”) is preferably 65% by mass or more.
The second ink contains (a-2) a polymerization initiator and (b-2) a polymerizable compound, and (b-2) a polyfunctional polymerizable compound (% of the total mass of the polymerizable compound). Hereinafter, it is also referred to as “polyfunctional monomer”) and is preferably 50% by mass or more. .

  In the ink, the mass ratio of the monofunctional polymerizable compound to the total mass of the polymerizable compound in the ink is also referred to as “monofunctional monomer ratio”, and the mass of the polyfunctional polymerizable compound relative to the total mass of the polymerizable compound in the ink. The ratio is also referred to as “polyfunctional monomer ratio”. The monofunctional monomer ratio (%) and polyfunctional monomer ratio (%) shall be rounded off to the nearest whole number.

The ink is a radiation curable ink that can be cured by irradiation with actinic radiation.
The “actinic radiation” is not particularly limited as long as it is an actinic radiation capable of imparting energy capable of generating a starting species in the ink by the irradiation, and widely includes α rays, γ rays, X rays, ultraviolet rays. (UV), visible light, electron beam and the like are included, and among them, ultraviolet light and electron beam are preferable from the viewpoint of curing sensitivity and availability of the apparatus, and ultraviolet light is particularly preferable. Therefore, the ink is preferably an ink that can be cured by irradiating ultraviolet rays as radiation.

Here, the first ink and the second ink, that is, the first printing layer 31 formed by the first ink and the second printing layer 32 formed by the second ink have characteristics or functions. Different from each other.
Examples of the characteristics include physical characteristics, chemical characteristics, electrical characteristics, magnetic characteristics, and the like, and physical characteristics or chemical characteristics are preferable. Examples of physical characteristics include hardness and viscosity. Examples of the chemical characteristics include acid resistance, water resistance, light resistance, and heat resistance. Examples of the electrical characteristics include conductivity and resistivity. Examples of magnetic characteristics include magnetic flux density.

  In the present embodiment, when the first print layer 31 formed of the first ink is compared with the second print layer 32 formed of the second ink, the first print layer 31 is The second printed layer 32 is stretched under heating, and the second printed layer 32 has a higher elastic modulus than the first printed layer 31. Therefore, the first ink is preferably used in a portion to be deformed, and the second ink is preferably used in a portion to be subjected to shearing processing or to which pressure is applied for attachment or the like.

Hereinafter, each component of the ink will be described.
(A) Polymerization initiator As a polymerization initiator, a well-known radical polymerization initiator and a well-known cationic polymerization initiator can be used. A polymerization initiator may be used individually by 1 type, and may use 2 or more types together. Moreover, you may use together a radical polymerization initiator and a cationic polymerization initiator.

The polymerization initiator is a compound that absorbs external energy to generate a polymerization initiating species. External energy used for initiating polymerization is roughly divided into heat and actinic radiation, and a thermal polymerization initiator and a photopolymerization initiator are used, respectively. Examples of the active radiation include γ rays, β rays, electron beams, ultraviolet rays, visible rays, and infrared rays.
In addition, the ink preferably contains a radical polymerization initiator when a radical polymerizable compound is used as the polymerizable compound, and the cationic polymerization initiator is used when a cationic polymerizable compound is used as the polymerizable compound. It is preferable to contain.

<Radical polymerization initiator>
As radical polymerization initiators, aromatic ketones, acylphosphine compounds, aromatic onium salt compounds, organic peroxides, thio compounds, hexaarylbiimidazole compounds, ketoxime ester compounds, borate compounds, azinium compounds, metallocene compounds, Examples thereof include active ester compounds, compounds having a carbon halogen bond, and alkylamine compounds. These radical polymerization initiators may be used alone or in combination. The radical polymerization initiator is suitably used alone or in combination of two or more.

<Cationic polymerization initiator>
As the cationic polymerization initiator (photoacid generator), for example, a chemical amplification type photoresist or a compound used for photocationic polymerization is used (Organic Materials Research Group, “Organic Materials for Imaging”, Bunshin Publishing) (1993), pages 187-192).

First, diazonium, ammonium, iodonium, sulfonium, _B aromatic onium compounds such as phosphonium ^{_{(C 6 F 5) 4 -}} , PF6 -, AsF 6 -, SbF 6 -, CF 3 SO 3 - and the like salts Can do. Secondly, sulfonated products that generate sulfonic acid can be mentioned. Thirdly, a halide that generates hydrogen halide can also be used. Fourthly, iron arene complexes can be mentioned.

In the ink, the total amount of the polymerization initiator used is preferably 0.01 to 35% by mass, and preferably 0.5 to 20% by mass, based on the total amount of the polymerizable compound used. Is more preferable, and it is still more preferable that it is 1.0-20 mass%. If it is 0.01% by mass or more, the ink can be sufficiently cured, and if it is 35% by mass or less, a cured film having a uniform degree of curing can be obtained.
Moreover, when using the sensitizer mentioned later for an ink, the total usage-amount of a polymerization initiator is mass ratio of a polymerization initiator: sensitizer, and polymerization initiator: sensitizer = 200: 1-1: 200. Preferably, it is 50: 1 to 1:50, more preferably 20: 1 to 1: 5.

(B) Polymerizable compound The ink contains a polymerizable compound.
The polymerizable compound preferably has a molecular weight of 1,000 or less, more preferably 50 to 800, and still more preferably 60 to 500.
The polymerizable compound is not particularly limited as long as it is a compound that undergoes a polymerization reaction such as a radical polymerization reaction, a cationic polymerization reaction, or an anion polymerization reaction by applying some energy, and is a curing compound. Although it can be used regardless, various known polymerizable compounds known as photopolymerizable compounds that cause a polymerization reaction by an initiating species generated from the polymerization initiator can be used.
Moreover, as a polymeric compound, a radically polymerizable compound and a cationically polymerizable compound can be illustrated preferably.

<Radically polymerizable compound>
The radical polymerizable compound is not particularly limited, and a known radical polymerizable compound can be used, but an ethylenically unsaturated compound is preferable, and a (meth) acrylate compound, a (meth) acrylamide compound, N-vinyl is preferable. More preferably, it is a compound and / or a vinyl ether compound, and more preferably a (meth) acrylate compound and / or an N-vinyl compound. “(Meth) acryl” means both acrylic and methacrylic.

When a radically polymerizable compound is used for the first ink, the first ink has 67 to 100% by mass of the monofunctional radically polymerizable compound in the total mass of the polymerizable compound (b-1). It is preferable that it is 70-100 mass%, It is more preferable that it is 85-95 mass%. Within the above range, the resulting image is excellent in flexibility.
When a radical polymerizable compound is used for the second ink, the second ink has a polyfunctional radical polymerizable compound in an amount of 55 to 100% by mass of the total mass of the polymerizable compound (b-2). It is preferably 60 to 100% by mass, more preferably 80 to 100% by mass, and 100% by mass, that is, (b-2) all polymerizable compounds are polyfunctional radical polymerizable compounds. It is particularly preferred that It is excellent in the flaw resistance and solvent resistance of the image obtained as it is the said range.
Moreover, the radically polymerizable compound may be monofunctional or polyfunctional.
The monofunctional radically polymerizable compound is preferably an N-vinyl compound described later, and more preferably an N-vinyl lactam.

In the case where a radical polymerizable compound is used as the polymerizable compound (b-1) in the first ink, the first ink further preferably contains an N-vinyl compound described later, and N-vinyl lactam. It is particularly preferred that
The polyfunctional radical polymerizable compound is preferably a polyfunctional (meth) acrylate compound described later. “(Meth) acrylate” means both acrylate and methacrylate.
Further, as the polyfunctional radical polymerizable compound, it is preferable to use a combination of a bifunctional radical polymerizable compound and a trifunctional or higher functional radical polymerizable compound, and the bifunctional radical polymerizable compound and the trifunctional radical polymerizable compound are preferably used. More preferably, it is used in combination with a compound.

  When a radical polymerizable compound is used as the (b-2) polymerizable compound in the second ink, the second ink is bifunctional radical polymerizable in the total mass of the (b-2) polymerizable compound. It is preferable that a compound is 30-100 mass%, It is more preferable that it is 50-95 mass%, It is further more preferable that it is 70-90 mass%. In addition, the second ink preferably contains 5 to 50% by mass, more preferably 10 to 30% by mass of a tri- or higher functional radical polymerizable compound out of the total mass of the polymerizable compound (b-2). More preferred. Furthermore, the second ink preferably contains 5 to 50% by mass, more preferably 10 to 30% by mass of the trifunctional radical polymerizable compound in the total mass of the polymerizable compound (b-2).

When a radical polymerizable compound is used for the first ink, the first ink preferably has a monofunctional radical polymerizable compound of 50 to 95% by mass of the total mass of the first ink. More preferably, it is 55-90 mass%, and it is further more preferable that it is 60-85 mass%. Within the above range, the resulting image is excellent in flexibility.
When a radical polymerizable compound is used for the second ink, the second ink preferably has a polyfunctional radical polymerizable compound in an amount of 50 to 98% by mass in the total mass of the second ink. It is more preferably 55 to 95% by mass, and further preferably 60 to 90% by mass. It is excellent in the flaw resistance and solvent resistance of the image obtained as it is the said range.

Below, a monofunctional radically polymerizable compound and a polyfunctional radically polymerizable compound are demonstrated.
[Monofunctional radical polymerizable monomer]
As the radically polymerizable compound, a monofunctional radically polymerizable monomer can be used.
Preferred examples of the monofunctional radical polymerizable monomer include monofunctional acrylate compounds, monofunctional methacrylates, monofunctional N-vinyl compounds, monofunctional acrylamide compounds, and monofunctional methacrylamide compounds. More preferred examples include methacrylate compounds and monofunctional N-vinyl compounds.

When the first ink contains a monofunctional radical polymerizable monomer, the monofunctional radical polymerizable monomer is a monofunctional acrylate compound and a monofunctional N-vinyl compound, or a monofunctional methacrylate compound and a monofunctional N-vinyl. A compound is preferably used in combination, and a monofunctional acrylate compound and a monofunctional N-vinyl compound are particularly preferably used in combination.
The monofunctional radical polymerizable monomer has only one ethylenically unsaturated double bond group selected from the group consisting of acryloyloxy group, methacryloyloxy group, acrylamide group, methacrylamide group and N-vinyl group, It is more preferable to use a monomer having a cyclic structure.
Moreover, an ethylenically unsaturated compound is mentioned as a radically polymerizable monomer which can be used suitably.

  Monofunctional acrylates, monofunctional methacrylates, monofunctional vinyloxy compounds, monofunctional acrylamides and monofunctional methacrylamides include phenyl group, naphthyl group, anthracenyl group, pyridinyl group, tetrahydrofurfuryl group, piperidinyl group, cyclohexyl group Monofunctional radical-polymerizable monomers having a group having a cyclic structure such as cyclopentyl group, cycloheptyl group, isobornyl group, tricyclodecanyl group and the like are preferable.

  Monofunctional radically polymerizable monomers are preferably norbornyl (meth) acrylate, isobornyl (meth) acrylate, cyclohexyl (meth) acrylate, cyclopentyl (meth) acrylate, cycloheptyl (meth) acrylate, cyclooctyl (meth) acrylate, cyclodecyl (Meth) acrylate, dicyclodecyl (meth) acrylate, trimethylcyclohexyl (meth) acrylate, 4-t-butylcyclohexyl (meth) acrylate, acryloylmorpholine, 2-benzyl (meth) acrylate, phenoxyethyl (meth) acrylate, phenoxydiethylene glycol (Meth) acrylate, phenoxytriethylene glycol (meth) acrylate, EO-modified cresol (meth) acrelane , Tetrahydrofurfuryl (meth) acrylate, caprolactone modified tetrahydrofurfuryl acrylate, nonylphenoxy polyethylene glycol (meth) acrylate, neopentyl glycol benzoate (meth) acrylate, paracumylphenoxyethylene glycol (meth) acrylate, N-phthalimidoethyl (meta) ) Acrylate, pentamethylpiperidyl (meth) acrylate, tetramethylpiperidyl (meth) acrylate, N-cyclohexylacrylamide, N- (1,1-dimethyl-2-phenyl) ethylacrylamide, N-diphenylmethylacrylamide, N-phthalimidomethyl Acrylamide, N- (1,1′-dimethyl-3- (1,2,4-triazol-1-yl)) propyl acrylic De, 5- (meth) acryloyloxy-methyl-5-ethyl-1,3-dioxacyclohexane like.

Moreover, it is preferable to use the radically polymerizable monomer which has an N-vinyl group and has a group which has a cyclic structure as a monofunctional radically polymerizable monomer. Of these, N-vinylcarbazole, 1-vinylimidazole, and N-vinyllactams are preferably used, and N-vinyllactams are more preferably used.
In the first ink, the monofunctional cyclic polymerizable monomer having an N-vinyl group is preferably contained in an amount of ˜40 mass%, more preferably 10-35 mass%, more preferably 12˜12%. More preferably, the content is 30% by mass. In the above range, an ink exhibiting good copolymerizability with other polymerizable compound and excellent in curability and blocking resistance can be obtained.
In the first ink, the monofunctional N-vinyl lactam is preferably contained in an amount of 1 to 40% by mass, more preferably 10 to 35% by mass, and more preferably 12 to 30% by mass of the entire first ink. % Content is more preferable.

  When the use amount of the monofunctional N-vinyl lactam is within the above numerical range, the curability, the cured film flexibility, and the adhesion of the cured film to the support are excellent. N-vinyl lactams are compounds having a relatively high melting point. When the content of N-vinyl lactam is 40% by mass or less, good solubility is exhibited even at a low temperature of 0 ° C. or less, and the temperature range in which ink can be handled is widened.

  The following acyclic monofunctional monomer can also be used as the monofunctional radical polymerizable monomer. The acyclic monofunctional monomer has a relatively low viscosity, and can be preferably used, for example, for the purpose of reducing the viscosity of the ink. However, the ratio of the following acyclic monofunctional monomer to the whole ink is 20% by mass or less from the viewpoint of suppressing the stickiness of the cured film and providing a high film strength that does not cause scratches during molding. preferable. More preferably, it is 15 mass% or less.

  Specifically, octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate, tridecyl (meth) acrylate, tetradecyl (meth) acrylate, hexadecyl (meth) acrylate, 2 -Hydroxyethyl (meth) acrylate, butoxyethyl (meth) acrylate, carbitol (meth) acrylate, 2-ethylhexyl diglycol (meth) acrylate, polyethylene glycol (meth) acrylate monomethyl ether, polypropylene glycol (meth) acrylate monomethyl ether, Examples include polytetraethylene glycol (meth) acrylate monomethyl ether.

  Besides these, (poly) ethylene glycol mono (meth) acrylate, (poly) ethylene glycol (meth) acrylate methyl ester, (poly) ethylene glycol (meth) acrylate ethyl ester, (poly) ethylene glycol (meta) ) Acrylate phenyl ester, (poly) propylene glycol mono (meth) acrylate, (poly) propylene glycol mono (meth) acrylate phenyl ester, (poly) propylene glycol (meth) acrylate methyl ester, (poly) propylene glycol (meth) acrylate Ethyl ester, 2-ethylhexyl acrylate, n-octyl acrylate, n-nonyl acrylate, n-decyl acrylate, isooctyl acrylate, n-lauryl acrylate N-tridecyl acrylate, n-cetyl acrylate, n-stearyl acrylate, 2-hydroxyethyl acrylate, butoxyethyl acrylate, tetrahydrofurfuryl acrylate, benzyl acrylate, oligoester acrylate, N-methylol acrylamide, diacetone acrylamide, epoxy Acrylate, methyl methacrylate, n-butyl methacrylate, 2-ethylhexyl methacrylate, n-octyl methacrylate, n-nonyl methacrylate, n-decyl methacrylate, isooctyl methacrylate, n-lauryl methacrylate, n-tridecyl methacrylate, n-cetyl methacrylate, n-stearyl methacrylate, allyl methacrylate, glycidyl methacrylate, Jill methacrylate, dimethylaminomethyl methacrylate, and allyl glycidyl ether and the like.

  Further, 2-ethylhexyl-diglycol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-hydroxybutyl acrylate, 2-acryloyloxyethylphthalic acid, 2-acryloyloxyethyl-2-hydroxyethylphthalic acid, ethoxy Examples thereof include phenyl acrylate, 2-acryloyloxyethyl succinic acid, 2-acryloyloxyethyl hexahydrophthalic acid, lactone-modified flexible acrylate, butoxyethyl acrylate, 2-hydroxyethyl acrylate, and methoxydipropylene glycol acrylate. .

[Polyfunctional radical polymerizable monomer]
A polyfunctional radically polymerizable monomer can be used as the radically polymerizable compound.
The polyfunctional radically polymerizable monomer includes two ethylenically unsaturated double bonds selected from the group consisting of acryloyloxy group, methacryloyloxy group, acrylamide group, methacrylamide group, vinyloxy group, and N-vinyl group. The polyfunctional polymerizable monomer which has the above can be illustrated preferably. By containing a polyfunctional polymerizable monomer, an ink having high cured film strength can be obtained.

  Examples of the polyfunctional radical polymerizable monomer having an ethylenically unsaturated bond capable of radical polymerization include unsaturated carboxylic acids such as acrylic acid, methacrylic acid, itaconic acid, crotonic acid, isocrotonic acid, maleic acid, and salts thereof, Anhydrides having ethylenically unsaturated groups, acrylonitrile, styrene, various unsaturated polyesters, unsaturated polyethers, unsaturated polyamides, unsaturated urethane (meth) acrylic monomers or prepolymers, epoxy monomers or prepolymers, A compound having two or more ethylenically unsaturated double bond groups, which is a (meth) acrylic ester such as a urethane monomer or a prepolymer, is preferably used.

  Specific examples include neopentyl glycol di (meth) acrylate, (poly) ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, (triethylene glycol di (meth) acrylate, and tetraethylene glycol di (meth) acrylate. , Polypropylene glycol di (meth) acrylate, (poly) tetramethylene glycol di (meth) acrylate, propylene oxide (PO) adduct di (meth) acrylate of bisphenol A, ethoxylated neopentyl glycol di (meth) acrylate, propoxylation Neopentyl glycol di (meth) acrylate, bisphenol A ethylene oxide (EO) adduct di (meth) acrylate, EO-modified pentaerythritol tri (meth) acrylate , PO-modified pentaerythritol tri (meth) acrylate, EO-modified pentaerythritol tetra (meth) acrylate, PO-modified pentaerythritol tetra (meth) acrylate, EO-modified dipentaerythritol tetra (meth) acrylate, PO-modified dipentaerythritol tetra (Meth) acrylate, EO-modified trimethylolpropane tri (meth) acrylate, PO-modified trimethylolpropane tri (meth) acrylate, EO-modified tetramethylolmethanetetra (meth) acrylate, PO-modified tetramethylolmethanetetra (meth) acrylate, penta Erythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol tetra (meth) acrylate, tri Tyrolpropane tri (meth) acrylate, tetramethylolmethane tetra (meth) acrylate, trimethylolethane tri (meth) acrylate, trimethylolpropane tri (meth) acrylate, bis (4- (meth) acryloxypolyethoxyphenyl) propane, Diallyl phthalate, triallyl trimellitate, 1,6-hexanediol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate, 1,10-decandiol di (meth) acrylate, neopentyl hydroxypivalate Glycol di (meth) acrylate, tetramethylol methane tri (meth) acrylate, dimethylol tricyclodecane di (meth) acrylate, modified glycerin tri (meth) acrylate, bisphenol A diglycy Diether ether (meth) acrylic acid adduct, modified bisphenol A di (meth) acrylate, caprolactone-modified dipentaerythritol hexa (meth) acrylate, dipentaerythritol hexa (meth) acrylate, pentaerythritol tri (meth) acrylate tolylene diisocyanate urethane Examples include prepolymers, pentaerythritol tri (meth) acrylate hexamethylene diisocyanate urethane prepolymers, ditrimethylolpropane tetra (meth) acrylate, and pentaerythritol tri (meth) acrylate hexamethylene diisocyanate urethane prepolymers. More specifically, Shinzo Yamashita “Cross-linking agent handbook” (1981, Taiseisha); Kato Kiyomi “UV / EB curing handbook (raw material)” (1985, Polymer publication society); Ed. "Application and Market of UV / EB Curing Technology", page 79 (1989, CMC); "Polyester Resin Handbook" by Eiichiro Takiyama (1988, Nikkan Kogyo Shimbun Co., Ltd.) Radical polymerizable or crosslinkable monomers, oligomers and polymers known in the industry can be used.

Among these, the following can be illustrated preferably as a polyfunctional radically polymerizable monomer.
Examples of the bifunctional radical polymerizable monomer include ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, Propylene glycol di (meth) acrylate, dipropylene glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, tetrapropylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, ethoxylated neopentyl glycol diacrylate Propoxylated neopentyl glycol diacrylate can be preferably exemplified.
Furthermore, it is also preferable to use a vinyl ether compound as the radical polymerizable compound.
The monomers listed as the radically polymerizable compound described above have high reactivity, low viscosity, and excellent adhesion to the support.

<Cationically polymerizable compound>
As the cationic polymerizable compound, from the viewpoint of curability and scratch resistance, an oxetane ring-containing compound and an oxirane ring-containing compound are preferable, and an embodiment containing both the oxetane ring-containing compound and the oxirane ring-containing compound is more preferable.
Here, the oxirane ring-containing compound (hereinafter also referred to as “oxirane compound”) is a compound containing at least one oxirane ring (oxiranyl group, epoxy group) in the molecule, specifically, as an epoxy resin. It can select suitably from what is normally used, for example, a conventionally well-known aromatic epoxy resin, an alicyclic epoxy resin, and an aliphatic epoxy resin is mentioned. Any of a monomer, an oligomer, and a polymer may be sufficient.
An oxetane ring-containing compound (hereinafter also referred to as “oxetane compound”) is a compound containing at least one oxetane ring (oxetanyl group) in the molecule.

When a cationic polymerizable compound is used for the first ink, the first ink has 65 to 95% by mass of the monofunctional cationic polymerizable compound in the total mass of the polymerizable compound (b-1). It is preferably 65 to 85 mass%, more preferably 65 to 75 mass%. Within the above range, the resulting image is excellent in flexibility.
When a cationically polymerizable compound is used for the second ink, the second ink has a polyfunctional cationically polymerizable compound in an amount of 50 to 90% by mass in the total mass of the polymerizable compound (b-2). It is preferably 52 to 75% by mass, more preferably 55 to 65% by mass. It is excellent in the flaw resistance and solvent resistance of the image obtained as it is the said range.

The cationically polymerizable compound may be monofunctional or polyfunctional.
The monofunctional cationically polymerizable compound is preferably a monofunctional oxirane compound and / or a monofunctional oxetane compound.
The polyfunctional cation polymerizable compound is preferably a bifunctional cation polymerizable compound. Moreover, as a polyfunctional radically polymerizable compound, it is preferable that they are a polyfunctional oxirane compound and / or a polyfunctional oxetane compound, and it is more preferable to use a polyfunctional oxirane compound and a polyfunctional oxetane compound together.

When a cationic polymerizable compound is used for the first ink, the first ink preferably has a monofunctional cationic polymerizable compound of 40 to 95% by mass in the total mass of the first ink. More preferably, it is 45-80 mass%, and it is further more preferable that it is 45-65 mass%. Within the above range, the resulting image is excellent in flexibility.
When a cationically polymerizable compound is used for the second ink, the second ink preferably has a polyfunctional cationically polymerizable compound in an amount of 35 to 90% by mass in the total mass of the second ink. More preferably, it is 38-75 mass%, and it is further more preferable that it is 40-60 mass%. It is excellent in the flaw resistance and solvent resistance of the image obtained as it is the said range.

Hereinafter, the monofunctional cation polymerizable compound and the polyfunctional cation polymerizable compound will be described in detail.
Examples of the cationic polymerizable compound include JP-A-6-9714, JP-A-2001-31892, JP-A-2001-40068, JP-A-2001-55507, JP-A-2001-310938, JP-A-2001-310937, and JP-A-2001-2001. Examples thereof include epoxy compounds, vinyl ether compounds, oxetane compounds and the like described in each publication such as No. 220526.

  Examples of monofunctional epoxy compounds include, for example, phenyl glycidyl ether, p-tert-butylphenyl glycidyl ether, butyl glycidyl ether, 2-ethylhexyl glycidyl ether, allyl glycidyl ether, 1,2-butylene oxide, 1,3-butadiene. Monooxide, 1,2-epoxydodecane, epichlorohydrin, 1,2-epoxydecane, styrene oxide, cyclohexene oxide, 3-methacryloyloxymethylcyclohexene oxide, 3-acryloyloxymethylcyclohexene oxide, 3-vinylcyclohexene oxide, etc. Is mentioned.

Examples of polyfunctional epoxy compounds include, for example, bisphenol A diglycidyl ether, bisphenol F diglycidyl ether, bisphenol S diglycidyl ether, brominated bisphenol A diglycidyl ether, brominated bisphenol F diglycidyl ether, and brominated bisphenol. S diglycidyl ether, epoxy novolac resin, hydrogenated bisphenol A diglycidyl ether, hydrogenated bisphenol F diglycidyl ether, hydrogenated bisphenol S diglycidyl ether, 3,4-epoxycyclohexylmethyl-3 ′, 4′-epoxycyclohexanecarboxy 2- (3,4-epoxycyclohexyl) -7,8-epoxy-1,3-dioxaspiro [5.5] undecane, bis (3,4-epoxycyclohexyl) Rumethyl) adipate, vinylcyclohexene oxide, 4-vinylepoxycyclohexane, bis (3,4-epoxy-6-methylcyclohexylmethyl) adipate, 3,4-epoxy-6-methylcyclohexyl-3 ′, 4′-epoxy-6 '-Methylcyclohexanecarboxylate, methylenebis (3,4-epoxycyclohexane), dicyclopentadiene diepoxide, ethylene glycol di (3,4-epoxycyclohexylmethyl) ether, ethylenebis (3,4-epoxycyclohexanecarboxylate) , Epoxyhexahydrophthalate dioctyl, epoxyhexahydrophthalate di-2-ethylhexyl, 1,4-butanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, Resin triglycidyl ether, trimethylolpropane triglycidyl ether, polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ethers, 1,13-tetradecadiene dioxide, limonene dioxide, 1,2,7,8-diepoxyoctane 1,2,5,6-diepoxycyclooctane and the like.
Among these epoxy compounds, aromatic epoxides and alicyclic epoxides are preferable from the viewpoint of excellent curing speed, and alicyclic epoxides are particularly preferable.

As the vinyl ether compound, a di- or trivinyl ether compound is preferable from the viewpoints of curability, adhesion to a support, surface hardness of the formed image, and the like, and a divinyl ether compound is particularly preferable.
As the oxetane compound, known oxetane compounds such as those described in JP-A Nos. 2001-220526, 2001-310937, and 2003-341217 can be arbitrarily selected and used.
As the oxetane compound, a compound having 1 to 4 oxetane rings in its structure is preferable. By using such a compound, it becomes easy to maintain the viscosity of the liquid for ink jet recording in a favorable handling property range, and it is possible to obtain high adhesion to the ink support after curing. .

  Examples of monofunctional oxetane compounds include, for example, 3-ethyl-3-hydroxymethyloxetane, 3- (meth) allyloxymethyl-3-ethyloxetane, (3-ethyl-3-oxetanylmethoxy) methylbenzene, 4- Fluoro- [1- (3-ethyl-3-oxetanylmethoxy) methyl] benzene, 4-methoxy- [1- (3-ethyl-3-oxetanylmethoxy) methyl] benzene, [1- (3-ethyl-3- Oxetanylmethoxy) ethyl] phenyl ether, isobutoxymethyl (3-ethyl-3-oxetanylmethyl) ether, isobornyloxyethyl (3-ethyl-3-oxetanylmethyl) ether, isobornyl (3-ethyl-3-oxetanylmethyl) ) Ether, 2-ethylhexyl (3-ethyl-3-oxe) Nylmethyl) ether, ethyldiethylene glycol (3-ethyl-3-oxetanylmethyl) ether, dicyclopentadiene (3-ethyl-3-oxetanylmethyl) ether, dicyclopentenyloxyethyl (3-ethyl-3-oxetanylmethyl) ether, Dicyclopentenyl (3-ethyl-3-oxetanylmethyl) ether, tetrahydrofurfuryl (3-ethyl-3-oxetanylmethyl) ether, tetrabromophenyl (3-ethyl-3-oxetanylmethyl) ether, 2-tetrabromophenoxy Ethyl (3-ethyl-3-oxetanylmethyl) ether, tribromophenyl (3-ethyl-3-oxetanylmethyl) ether, 2-tribromophenoxyethyl (3-ethyl-3-oxetanylmethyl) ether 2-hydroxyethyl (3-ethyl-3-oxetanylmethyl) ether, 2-hydroxypropyl (3-ethyl-3-oxetanylmethyl) ether, butoxyethyl (3-ethyl-3-oxetanylmethyl) ether, pentachlorophenyl (3-ethyl-3-oxetanylmethyl) ether, pentabromophenyl (3-ethyl-3-oxetanylmethyl) ether, bornyl (3-ethyl-3-oxetanylmethyl) ether and the like.

  Examples of the polyfunctional oxetane compound include, for example, 3,7-bis (3-oxetanyl) -5-oxanonane, 3,3 ′-(1,3- (2-methylenyl) propanediylbis (oxymethylene)) bis. (3-ethyloxetane), 1,4-bis [(3-ethyl-3-oxetanylmethoxy) methyl] benzene, 1,2-bis [(3-ethyl-3-oxetanylmethoxy) methyl] ethane, 1,3 -Bis [(3-ethyl-3-oxetanylmethoxy) methyl] propane, ethylene glycol bis (3-ethyl-3-oxetanylmethyl) ether, dicyclopentenylbis (3-ethyl-3-oxetanylmethyl) ether, triethylene Glycol bis (3-ethyl-3-oxetanylmethyl) ether, tetraethylene glycol bis (3- Ru-3-oxetanylmethyl) ether, tricyclodecanediyldimethylene (3-ethyl-3-oxetanylmethyl) ether, trimethylolpropane tris (3-ethyl-3-oxetanylmethyl) ether, 1,4-bis (3 -Ethyl-3-oxetanylmethoxy) butane, 1,6-bis (3-ethyl-3-oxetanylmethoxy) hexane, pentaerythritol tris (3-ethyl-3-oxetanylmethyl) ether, pentaerythritol tetrakis (3-ethyl- 3-oxetanylmethyl) ether, polyethylene glycol bis (3-ethyl-3-oxetanylmethyl) ether, dipentaerythritol hexakis (3-ethyl-3-oxetanylmethyl) ether, dipentaerythritol pentakis (3-ethyl) -3-oxetanylmethyl) ether, dipentaerythritol tetrakis (3-ethyl-3-oxetanylmethyl) ether, caprolactone-modified dipentaerythritol hexakis (3-ethyl-3-oxetanylmethyl) ether, caprolactone-modified dipentaerythritol pentakis (3-ethyl-3-oxetanylmethyl) ether, ditrimethylolpropanetetrakis (3-ethyl-3-oxetanylmethyl) ether, EO-modified bisphenol A bis (3-ethyl-3-oxetanylmethyl) ether, PO-modified bisphenol A bis (3-ethyl-3-oxetanylmethyl) ether, EO-modified hydrogenated bisphenol A bis (3-ethyl-3-oxetanylmethyl) ether, PO-modified hydrogenated bisphenol A bis (3-e Multifunctional oxetanes such as til-3-oxetanylmethyl) ether and EO-modified bisphenol F (3-ethyl-3-oxetanylmethyl) ether.

In addition, these cationically polymerizable compounds may use only 1 type, or may use 2 or more types together.
Further, the total mass of the polymerizable compound in the ink is preferably 55 to 95% by mass and more preferably 60 to 90% by mass with respect to the total mass of the ink. Within the above range, the curability is excellent and the viscosity is moderate.
Moreover, there is no restriction | limiting in particular as a manufacturing method of a polymeric compound, It can synthesize | combine by a well-known method. Moreover, when available, you may use a commercial item.

(C) Colorant The ink may contain a colorant in order to improve the visibility of the formed image portion.
The colorant is not particularly limited, but pigments and oil-soluble dyes that have excellent weather resistance and excellent color reproducibility are preferable, and can be arbitrarily selected from known colorants such as soluble dyes. . From the viewpoint of not reducing the sensitivity of the curing reaction by actinic radiation, it is preferable to select a compound that does not function as a polymerization inhibitor in the polymerization reaction, which is a curing reaction, as the colorant that can be suitably used for the ink.
Although it does not necessarily limit as a pigment, For example, the organic or inorganic pigment of the following number described in a color index can be used.

Examples of red or magenta pigments include Pigment Red 3, 5, 19, 22, 31, 38, 42, 43, 48: 1, 48: 2, 48: 3, 48: 4, 48: 5, 49: 1, 53. : 1, 57: 1, 57: 2, 58: 4, 63: 1, 81, 81: 1, 81: 2, 81: 3, 81: 4, 88, 104, 108, 112, 122, 123, 144 , 146, 149, 166, 168, 169, 170, 177, 178, 179, 184, 185, 208, 216, 226, 257, Pigment Violet 3, 19, 23, 29, 30, 37, 50, 88, Pigment Orange 13, 16, 20, 36,
Pigment Blue 1,15,15: 1,15: 2,15: 3,15: 4,15: 6,16,17-1,22,27,28,29,36,60 as a blue or cyan pigment ,
As a green pigment, Pigment Green 7, 26, 36, 50,
As yellow pigments, Pigment Yellow 1, 3, 12, 13, 14, 17, 34, 35, 37, 55, 74, 81, 83, 93, 94, 95, 97, 108, 109, 110, 120, 137 , 138, 139, 153, 154, 155, 157, 166, 167, 168, 180, 185, 193,
As the black pigment, Pigment Black 7, 28, 26,
As a white pigment, Pigment White 6, 18, 21
Etc. can be used according to the purpose.

Further, it is preferable that the colorant is appropriately dispersed in the ink after being added to the ink or the ink for inkjet recording. For dispersing the colorant, for example, a dispersion device such as a ball mill, a sand mill, an attritor, a roll mill, an agitator, a Henschel mixer, a colloid mill, an ultrasonic homogenizer, a pearl mill, a wet jet mill, or a paint shaker can be used.
The colorant may be blended directly with each component when preparing the ink. However, in order to improve dispersibility, the colorant is added in advance to a dispersion medium such as a solvent or a radical polymerizable compound, and uniformly dispersed or dissolved. It can also be blended later.

(D) Dispersant The ink preferably contains a dispersant in order to stably disperse the pigment in the ink.
As the dispersant, a polymer dispersant is preferable. The “polymer dispersant” means a dispersant having a mass average molecular weight of 1,000 or more.

Dispersor BYK-101, DisperBYK-102, DisperBYK-103, DisperBYK-106, DisperBYK-111, DisperBYK-161, DisperBYK-162, DisperBYK-164D, DisperBYK-164D, , DisperBYK-168, DisperBYK-170, DisperBYK-171, DisperBYK-174, DisperBYK-182 (manufactured by BYK Chemie), EFKA4010, EFKA4046, EFKA5080, EFKA5010, EFKA5010, EFKA5010, EFKA5010, EFKA5010, EFKA5010, EFKA5010 Polymers such as KA745, EFKA7462, EFKA7500, EFKA7570, EFKA7575, EFKA7580 (manufactured by Efka Additive), Disperse Aid 6, Disperse Aid 8, Disperse Aid 15, Disperse Aid 9100 (Sannopco) Dispersant: Solsperse (Solsperse) 3000, 5000, 9000, 12000, 13240, 13940, 17000, 22000, 24000, 26000, 28000, 32000, 36000, 39000, 41000, 71000, etc. Adeka Pluronic L31, F38, L42, L44, L61, L64, F68, L72, P95, F77, P84, F87, P94, L101, P1 3, F108, L121, P-123 (manufactured by ADEKA Co., Ltd.) and Isonet S-20 (manufactured by Sanyo Kasei Kogyo Co., Ltd.), manufactured by Enomoto Kasei Co., Ltd. Agent), # 2150 (aliphatic polyvalent carboxylic acid), # 7004 (polyether ester type) ”.
The content of the dispersant in the ink is appropriately selected depending on the purpose of use, but it is preferably 0.05 to 15% by mass with respect to the total mass of the ink.

(E) Other components Other components than the above components can be added to the ink as necessary.
Examples of other components include sensitizers, co-sensitizers, surfactants, ultraviolet absorbers, antioxidants, anti-fading agents, conductive salts, solvents, polymer compounds, basic compounds, and the like. .
In addition to this, as necessary, for example, leveling additives, matting agents, waxes for adjusting film properties, polyolefins, PET, and the like to improve the adhesion to a support such as PET, do not inhibit the polymerization A tackifier or the like can be contained.

  As the tackifier, specifically, a high molecular weight adhesive polymer described in JP-A-2001-49200, 5-6p (for example, (meth) acrylic acid and an alkyl group having 1 to 20 carbon atoms). An ester with an alcohol having, an ester of (meth) acrylic acid with an alicyclic alcohol having 3 to 14 carbon atoms, a copolymer comprising an ester of (meth) acrylic acid with an aromatic alcohol having 6 to 14 carbon atoms) And a low molecular weight tackifier resin having a polymerizable unsaturated bond.

Next, a printing apparatus used for manufacturing the printed material 1 will be described.
[Printer]
As shown in FIG. 3, the printing apparatus (printed product manufacturing apparatus) 1 discharges radiation curable ink onto a base material 30, and then irradiates the discharged radiation curable ink with radiation. It hardens | cures and draws a character, a number, various designs, etc. on the base material 30. FIG.

  The printing apparatus 1a includes a base 2 on which the base material 30 is placed, a transport device 3 that transports the base material 30 on the base 2 in the X direction in FIG. 3, and droplets that eject radiation-curable ink. An ejection head (not shown), a carriage 4 including a plurality of droplet ejection heads, and a feeding device 5 that moves the carriage 4 in the Y direction orthogonal to the X direction are configured. Yes. In the present embodiment, the transfer device 3 and the feed device 5 constitute a moving device that relatively moves the base material 30 and the carriage 4 in the X direction and the Y direction, respectively.

  The transfer device 3 includes a work stage 6 and a stage moving device 7 provided on the base 2. The work stage 6 is provided so as to be movable in the X direction on the base 2 by the stage moving device 7, and is transported from a transport device (not shown) arranged on the upstream side of the printing device 1a in the manufacturing process. The substrate 30 is held on the XY plane by, for example, a vacuum suction mechanism. The stage moving device 7 is provided with a bearing mechanism such as a ball screw or a linear guide. It is comprised so that it may move to.

As shown in FIGS. 4 and 5, the carriage 4 has a rectangular plate shape that is movably attached to the feeding device 5, and a plurality of (in this embodiment, ten) droplet discharge heads (10 in this embodiment) are provided on the bottom surface 4 a side. The film forming apparatus 9 is held in a state of being arranged along the Y direction.
The plurality of droplet discharge heads 9 (9Y, 9C, 9M, 9K, 9W) are provided with a large number (a plurality) of nozzles as will be described later, and drawing data and drive control signals input from the control device 8 are provided. On the basis of the above, droplets of radiation curable ink are ejected. Further, these droplet discharge heads 9 (9Y, 9C, 9M, 9K, 9W) are radiation curable inks corresponding to Y (yellow), C (cyan), M (magenta), K (black), and transparent. Color or white (W) radiation curable ink is ejected, and each droplet ejection head 9 is connected to a tube (piping) 10 via a carriage 4 as shown in FIG. . Of the ten droplet discharge heads 9, five droplet discharge heads 9 on the left side in FIG. 4 are used for discharging the first ink droplets, and five droplet discharge heads on the right side in FIG. 4 are discharged. The head 9 is used for discharging the second ink droplet.

A droplet discharge head 9Y corresponding to Y (yellow) is connected to a first tank 11Y filled and stored with radiation curable ink for Y (yellow) via a tube 10, thereby discharging droplets. The head 9Y is supplied with radiation curing ink for Y (yellow) from the first tank 11Y.
Similarly, the droplet discharge head 9C corresponding to C (cyan) is filled with the C (cyan) radiation curable ink, and the droplet discharge head 9M corresponding to M (magenta) is filled with M. The droplet discharge head 9K corresponding to the third tank 11M, K (black) filled with radiation magenta ink for (magenta) has fourth tanks 11K, W filled with radiation curing ink for K (black). A fifth tank 11W filled with radiation curable ink for W (transparent) is connected to the droplet discharge head 9W corresponding to (transparent or white, here transparent). With this configuration, each droplet discharge head 9 is supplied with a corresponding radiation curable ink.

These droplet discharge heads 9Y, 9C, 9M, 9K, and 9W, tubes (piping) 10, and tanks 11Y, 11C, 11M, 11K, and 11W are provided for each color (Y, C, M, K, and W) system. A heating means (not shown) such as a heater is provided. That is, in each color system, at least one of the droplet discharge head 9, the tube 10, and the tank 11 is provided with heating means for reducing the viscosity of the radiation-curable ink and increasing its fluidity. Thus, the radiation curable ink is adjusted so that the ejection property from the droplet ejection head 9 is good.
Here, as described above, the radiation curable ink is of a type that is cured by receiving radiation of a predetermined wavelength, such as an ultraviolet curable ink. In addition, radiation curable inks usually have different wavelengths (ultraviolet rays) of radiation (ultraviolet rays) to be absorbed depending on their components (formulations), etc., so the optimum value of the curing wavelength, that is, the optimum curing wavelength also differs for each ink. Yes.

FIG. 6 is a schematic configuration diagram of the droplet discharge head 9. 6A is a plan view of the droplet discharge head 9 viewed from the work stage 6 side, FIG. 6B is a partial perspective view of the droplet discharge head 9, and FIG. It is a fragmentary sectional view for 1 nozzle.
As shown in FIG. 6A, the droplet discharge head 9 has a plurality (for example, 180) of nozzles N arranged in a direction intersecting the Y direction, in this embodiment, the X direction. N forms a nozzle array NA. Although the nozzles for one row are shown in the figure, the number of nozzles and the number of nozzle rows provided in the droplet discharge head 9 can be arbitrarily changed. For example, a plurality of nozzle rows NA arranged in the X direction are arranged in the Y direction. It may be provided.

  6B, the diaphragm 20 provided with the material supply hole 20a connected to the tube 10, the nozzle plate 21 provided with the nozzle N, the diaphragm 20 and the nozzle plate 21, A reservoir (liquid reservoir) 22, a plurality of partition walls 23, and a plurality of cavities (liquid chambers) 24 are provided. The surface (bottom surface) of the nozzle plate 21 is a nozzle surface 21 a on which a plurality of nozzles N are formed. On the vibration plate 20, piezoelectric elements (drive elements) PZ are arranged corresponding to the respective nozzles N. The piezoelectric element PZ is made of a piezo element, for example.

  The reservoir 22 is filled with radiation curable ink supplied via the material supply hole 20a. The cavities 24 are formed so as to be surrounded by the diaphragm 20, the nozzle plate 21, and the pair of partition walls 23, and are provided in a one-to-one correspondence with the nozzles N. In addition, radiation curable ink is introduced into the cavities 24 from the reservoir 22 through supply ports 24 a provided between the pair of partition walls 23.

  Further, as shown in FIG. 6C, the piezoelectric element PZ is obtained by sandwiching the piezoelectric material 25 between the pair of electrodes 26, and when the drive signal is applied to the pair of electrodes 26, the piezoelectric material 25 contracts. It is comprised so that it may do. Therefore, the diaphragm 20 on which such a piezoelectric element PZ is disposed is integrally bent with the piezoelectric element PZ and bends outward (opposite the cavity 24) at the same time. The volume of 24 is increased.

  Therefore, radiation curable ink corresponding to the increased volume in the cavity 24 flows from the liquid reservoir 22 through the supply port 24a. Further, when the application of the drive signal to the piezoelectric element PZ is stopped from such a state, both the piezoelectric element PZ and the diaphragm 20 return to the original shape, and the cavity 24 also returns to the original volume. As a result, the pressure of the radiation curable ink in the cavity 24 increases, and the droplets L of the radiation curable ink are ejected from the nozzle N toward the substrate 30.

The droplet discharge head 9 having such a configuration has a bottom surface of the nozzle plate 21, that is, a formation surface (nozzle surface) NS of the nozzle N that is lower than the bottom surface 4 a of the carriage 4 as shown in FIG. 4. In such a manner, it is arranged so as to protrude from the bottom surface 4a.
Further, as shown in FIGS. 4 and 5, the irradiation means 12 is arranged adjacent to each other on both sides of the carriage 4 with a plurality (10 in the figure) of droplet discharge heads 9 arranged therebetween. That is, the radiation irradiating means 12 is disposed on both sides of the droplet discharge heads 9 arranged in the Y direction along the arrangement direction.

  These radiation irradiating means 12 are for curing the radiation curable ink, and in the present embodiment, are composed of a large number of LEDs (light emitting diodes). However, in the present invention, the radiation irradiating means 12 is not limited to an LED as long as it can emit radiation having a wavelength that promotes the polymerization of the radiation curable ink. For example, a laser diode (LD), Furthermore, a mercury lamp lamp, a metal halide lamp, a xenon lamp, an excimer lamp, or the like can be used as the radiation irradiation means 12. For example, when an ultraviolet curable ink is used as the radiation curable ink, various light sources that emit ultraviolet light can be used.

  In the radiation irradiating means 12 composed of LEDs of this embodiment, the radiation to be irradiated is radiation having a wavelength band including the optimum curing wavelength of the radiation curable ink ejected by the droplet ejection head 9. In other words, as described above, each radiation curable ink is assumed to have an optimum curing wavelength depending on its component (formulation), etc., but by irradiating the radiation as described above, each radiation curable ink is optimal. Radiation having a curing wavelength is irradiated.

  As shown in FIG. 3, the feeding device 5 for moving the carriage 4 has a bridge structure straddling the base 2, for example, with respect to the Y direction and the Z direction orthogonal to the XY plane, such as a ball screw or a linear guide. A bearing mechanism is provided. Based on such a configuration, the feeding device 5 moves the carriage 4 in the Y direction based on the carriage position control signal indicating the Y coordinate and Z coordinate of the carriage 4 input from the control device 8, and It is also designed to move in the direction.

The control device 8 outputs a stage position control signal to the stage moving device 7, outputs a carriage position control signal to the feeding device 5, and further draws drawing data and data on a drive circuit board (not shown) of the droplet discharge head 9. A drive control signal is output. Accordingly, the control device 8 performs synchronous control of the positioning operation of the base material 30 by the movement of the work stage 6 and the positioning operation of the droplet discharge head 9 by the movement of the carriage 4 in order to relatively move the base material 30 and the carriage 4. In addition, by causing the droplet discharge head 9 to perform a droplet discharge operation, the droplets of the radiation curable ink are arranged at predetermined positions on the substrate 30. Further, the control device 8 is configured to cause the radiation irradiating means 12 to perform the radiation irradiation operation separately from causing the droplet discharge head 9 to perform the droplet discharge operation.
The printing apparatus 1a is configured as described above.

Next, the printed material 1 will be described.
As shown in FIGS. 1 and 2, the printed matter 1 has a first print layer 31, a second print layer 32, and a third print layer 33 provided directly or indirectly on the substrate 2. doing. That is, the printed material 1 is provided in the substrate 30 and different regions on the substrate 30, and is printed using a first ink that has different characteristics or functions and has a color difference. A layer 31, a second printed layer 32 that is printed using the second ink, and a boundary between the first printed layer 31 and the second printed layer 32. And a third printed layer 33 that forms a mixed region including the first ink and the second ink. By providing the third print layer 33, the first print layer 31 and the second print layer 32 can be separated from each other, and as a result, the first print layer 31 and the second print layer will be described later. When the color difference from 32 is small, the first print layer 31 and the second print layer 32 can appear to be the same color. In addition, since the third print layer 33 contains the first ink and the second ink, the boundary between the first print layer 31 and the second print layer 32 becomes inconspicuous.

The constituent material of the base material 30 is not particularly limited. For example, various resins, various glasses, various metals, and the like can be used, but a resin material is preferable from the viewpoint that it can be deformed.
The resin material is not particularly limited. For example, polyolefin such as polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer (EVA), cyclic polyolefin, modified polyolefin, polyvinyl chloride, poly Vinylidene chloride, polystyrene, polyamide, polyimide, polyamideimide, polycarbonate, poly- (4-methylpentene-1), ionomer, acrylic resin, polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile Styrene copolymer (AS resin), butadiene-styrene copolymer, polyoxymethylene, polyvinyl alcohol (PVA), ethylene-vinyl alcohol copolymer (EVOH), polyethylene terephthalate Polyester (PET), polybutylene terephthalate (PBT), polycyclohexane terephthalate (PCT) and other polyesters, polyether, polyether ketone (PEK), polyether ether ketone (PEEK), polyether imide, polyacetal (POM), Examples include polyphenylene oxide, modified polyphenylene oxide, polysulfone, polyethersulfone, polyphenylene sulfide, polyarylate, aromatic polyester (liquid crystal polymer), and copolymers, blends, and polymer alloys mainly composed of these. 1 type or 2 types or more can be used in combination (for example, as a laminate of two or more layers).

Moreover, when comprising the printed matter 1 so that it may be visually recognized from the base material 30 side, the base material 30 is made transparent. When the printed material 1 is configured to be viewed from the side opposite to the substrate 30, that is, from the first printed layer 31, the second printed layer 32, and the third printed layer 33 side, the substrate 30 may be opaque. Good or transparent.
Further, the printed material 1 before processing shown in FIG. 1A is subjected to shearing processing or attachment, etc., with a first processing region 41 that is a portion to be deformed, that is, a portion to be deformed. For this reason, it has the 2nd process area | region 42 which is a site | part to which a pressure is added. That is, the processed printed matter 1 shown in FIG. 1B is a first processed region 41 that is a deformed portion and a portion that is subjected to shearing or a portion to which pressure is applied for attachment or the like. And a second processing region 42. The first ink layer 31 is provided in the first processing region 41. The second ink layer 32 is provided in the second processing region 42. Note that both the printed material 1 before processing shown in FIG. 1 (a) and the printed material 1 after processing shown in FIG. 1 (b) are included in the printed material of the present invention.

Examples of the deformation process include a process of partially stretching such as a drawing process and a bending process. In the illustrated configuration, a bottomed cylindrical portion is formed in the first processing region 41 of the printed matter 1 by drawing.
Examples of the shearing process include punching and cutting. In the illustrated configuration, an opening is formed in the second processed region 42 of the printed matter 1 by punching.

  Further, the color difference when measured with a chromaticity meter (color difference meter) between the first print layer 31 and the second print layer 32 is preferably 2 or less, more preferably 1 or less, and 0 More preferably, it is 1 or more and 1 or less. As a result, when the first print layer 31 and the second print layer 32 are slightly separated from each other, the first print layer 31 and the second print layer 32 can be recognized as the same color.

Moreover, it is preferable that the coloring agent of the same hue is contained in the 1st printing layer 31 and the 2nd printing layer 32, and it is preferable that the common coloring agent is contained. Thereby, the color difference when it measures with the chromaticity meter of the 1st printing layer 31 and the 2nd printing layer 32 can be made as mentioned above.
Since the first printed layer 31 and the second printed layer 32 are different in the composition of the polymerizable compound due to the difference in characteristics, the same colorant or common colorant is used. Even so, the color difference between the first print layer 31 and the second print layer 32 is different.

  In addition, in the present embodiment, the first print layer 31 and the second print layer 32 may be in contact with each other, or may be spaced apart from each other. The second print layer 32 is disposed apart from the second print layer 32. The third print layer 33 is provided on the substrate 30 so as to fill the gap between the first print layer 31 and the second print layer 32. Note that the boundary between the first print layer 31 and the second print layer 32 is the first print layer when the first print layer 31 and the second print layer 32 are spaced apart from each other. This refers to the gap between the layer 31 and the second printed layer 32.

  The third print layer 33 has a plurality of first pixels 51 printed using the first ink and a plurality of second pixels 52 printed using the second ink 32. doing. Thereby, a gradation between the first print layer 31 and the second print layer 32 is formed between the first print layer 31 and the second print layer 32, and the first print layer 31. And the second printed layer 32 can be made inconspicuous. When the third printing layer 33 is formed by using the printing apparatus 1, one pixel of the first pixel 51 and the second pixel 52 may be formed by one dot (droplet, one drop). Alternatively, it may be formed with a plurality of dots.

In the third printed layer 33, the first pixels 51 and the second pixels 52 are arranged in a regular, that is, periodic pattern. In addition, the ratio between the first pixel 51 and the second pixel 52 in the third print layer 33 is set to be constant. Thereby, the 3rd printing layer 33 can be designed easily.
Further, the ratio of the first pixel 51 in the third print layer and the ratio of the second pixel 52 are not particularly limited, but the ratio of the first pixel 51 in the third print layer 33 is It is preferably 5% or more and 95% or less, and more preferably 30% or more and 70% or less. Similarly, the ratio of the second pixels 52 in the third printed layer 33 is preferably 5% or more and 95% or less, and more preferably 30% or more and 70% or less.

Note that the ratio of the first pixel 51 and the second pixel 52 in the third print layer 33 is from the first print layer 31 to the second print layer 32 as in the second embodiment described later. And may change. Thereby, the boundary between the first print layer 31 and the second print layer 32 can be made inconspicuous.
The width w of the third printed layer 33 is preferably 0.35 mm or more, and more preferably 10 mm or more. Thus, the first print layer 31 and the second print layer 32 can be separated to such an extent that the first print layer 31 and the second print layer 32 can be recognized as the same color.

Each of the first print layer 31, the second print layer 32, and the third print layer 33 is formed by printing. In the present embodiment, the first print layer 31, the second print layer 32, and the third print layer 33 are each formed by applying (applying) ink by an inkjet method using the printing apparatus 1a. Is. That is, the first printed layer 31 is obtained by applying the first ink by ejecting it from the nozzle N as a droplet by an ink jet method, and curing it by irradiating with radiation. The second printed layer 32 is obtained by applying the second ink by ejecting it as a droplet from the nozzle N by an ink jet method, and irradiating it with radiation to be cured. The third printed layer 33 is obtained by applying the first ink and the second ink by ejecting them as droplets from the nozzles N by the ink jet method, and irradiating them with radiation to cure them.
The printed material 1 is not particularly limited, and examples thereof include automobile interior parts such as speedometers, exterior parts of electric products, masks, signboards, and the like.

Next, a method for manufacturing the printed material 1 will be described.
For the production of the printed matter 1, the printing apparatus 1a is used.
First, as shown in FIG. 3, the base material 30 is placed on the work stage 6.
Next, the printing apparatus 1 a is operated, and the first ink is ejected and applied to the formation region of the first printing layer 31 on the substrate 30, and the second ink is applied to the formation region of the second printing layer 32. The ink is discharged and applied, and the first ink and the second ink are discharged and applied to the formation region of the third print layer 33. Further, the first and second inks applied by the radiation irradiating means 12 are irradiated with radiation and cured, so that the first print layer 31, the second print layer 32, and the third print layer. 33 is formed.

Next, the first processed region 41 provided with the first printed layer 31 is drawn to form a bottomed cylindrical portion. This drawing process is performed while heating the first processing region 41.
In addition, an opening is formed in the second processing region 42 provided with the second print layer 32 by punching.
Note that either the drawing process to the first machining area 41 or the punching process to the second machining area 42 may be performed first.

  As described above, according to the printed matter 1, by providing the third printed layer 33, the first printed layer 31 and the second printed layer 32 can be separated from each other. The print layer 31 and the second print layer 32 can be made to appear in the same color. In addition, since the third print layer 33 includes the first ink and the second ink, the boundary between the first print layer 31 and the second print layer 32 can be made inconspicuous.

Second Embodiment
FIG. 7 is a plan view showing a first printed layer, a second printed layer, and a third printed layer in the second embodiment of the printed matter of the present invention. In the following description, the left side in FIG. 7 is “left” and the right side is “right”. In FIG. 7, each pixel is illustrated in a large size for easy understanding.

Hereinafter, the second embodiment will be described with a focus on the differences from the first embodiment described above, and the description of the same matters will be omitted.
As shown in FIG. 7, in the printed matter 1 of the second embodiment, the first pixels 51 and the second pixels 52 are irregularly arranged in the third printed layer 33.
Further, the ratio of the first pixel 51 and the second pixel 52 in the third print layer 33 changes from the first print layer 31 toward the second print layer 32. That is, the ratio of the first pixels 51 in the third print layer 33 decreases from the first print layer 31 toward the second print layer 32. In addition, the ratio of the second pixels 52 in the third print layer 33 increases from the first print layer 31 toward the second print layer 32.

Thereby, a plurality of gradations between the first print layer 31 and the second print layer 32 are formed between the first print layer 31 and the second print layer 32, and the first print layer 31 and the second print layer 32 are formed. The boundary between the layer 31 and the second printed layer 32 can be made inconspicuous.
The irregularly arranged first pixels 51 and second pixels 52 can be formed by a dither mask process.
Note that, as in the first embodiment described above, the ratio between the first pixel 51 and the second pixel 52 in the third print layer 33 may be constant.

As mentioned above, although the printed matter of this invention and the manufacturing method of printed matter were demonstrated based on embodiment of illustration, this invention is not limited to this, The structure of each part is arbitrary structures which have the same function. Can be substituted. Moreover, other arbitrary structures and processes may be added to the present invention.
Further, the present invention may be a combination of any two or more configurations (features) of the above embodiments.
Moreover, in the said embodiment, although a 1st printing layer, a 2nd printing layer, and a 3rd printing layer are each formed on the base material, in this invention, it is not limited to this.

That is, the third print layer may be provided so as to cover the boundary between the first print layer and the second print layer when viewed from the direction in which the printed matter is viewed. Note that the first print layer and the second print layer may be in contact with each other or may be separated from each other.
Specifically, when the printed material is configured to be viewed from the side opposite to the substrate, that is, the printed material is viewed from the printed layer side, the first printed layer and the second printed layer are formed on the substrate, A third printed layer may be formed on the first printed layer and the second printed layer.

When the printed material is configured to be viewed from the substrate side, the third printed layer is formed on the substrate, and the first printed layer and the second printed layer are formed on the third printed layer and the substrate. You may form on a material.
Moreover, in the said embodiment, although the 1st printing layer, the 2nd printing layer, and the 3rd printing layer were printed simultaneously, in this invention, it is not limited to this.
For example, the first print layer and the second print layer may be printed first, and the third print layer may be printed later.

Alternatively, the third print layer may be printed first, and the second print layer and the third print layer may be printed later.
In the embodiment, the printed material is a first printed layer formed by the first ink, a second printed layer formed by the second ink, and a third printed layer formed by the third ink. However, the present invention may further include a fourth printing layer formed of the fourth ink. That is, the print layer is not limited to three types, and four or more types may be provided.
In the above-described embodiment, the size of the first ink droplet when forming the third print layer is preferably equal to the size of the second ink droplet. For example, the size of the first ink droplet is preferably within ± 10% of the size of the second ink droplet.

In the above-described embodiment, the viscosity of the first ink droplet is preferably equal to the viscosity of the second ink droplet. For example, the viscosity of the first ink droplet is preferably within ± 10% of the viscosity of the second ink droplet.
In the above embodiment, the dot interval of the first ink droplet is preferably equal to the dot interval of the second ink droplet.

  DESCRIPTION OF SYMBOLS 1 ... Printed material 1a ... Printing apparatus (printed material manufacturing apparatus) 2 ... Base 3 ... Conveying device 4 ... Carriage 4a ... Bottom surface 5 ... Feeding device 6 ... Work stage 7 ... Stage moving device 8 ... Control device 9, 9Y, 9C, 9M , 9K, 9W: Droplet discharge head (film forming apparatus) 10 ... Tube 11Y ... First tank 11C ... Second tank 11M ... Third tank 11K ... Fourth tank 11W ... Fifth tank 12 ... Radiation irradiation means 20a ... Material Supply hole 21 ... Nozzle plate 22 ... Reservoir 23 ... Partition 24 ... Cavity 24a ... Supply port 25 ... Piezoelectric material 26 ... Electrode 30 ... Base material 31 ... First print layer 32 ... Second print layer 33 ... Third Print layer 41... First processing region 42... Second processing region 51... First pixel 52.

Claims (18)

A substrate;
A first printing layer that is provided in different regions on the substrate, has different characteristics or functions, and has a color difference, and is printed using the first ink, and printing using the second ink A second printed layer comprising:
A third printing layer provided so as to cover or fill a boundary between the first printing layer and the second printing layer and forming a mixed region containing the first ink and the second ink; It has a door,
The third print layer includes a plurality of first pixels printed using the first ink and a plurality of second pixels printed using the second ink. ,
The printed matter , wherein a ratio between the first pixel and the second pixel changes from the first printed layer toward the second printed layer . The third in the printed layer, the printed matter according to claim 1, wherein the first pixel and the second pixel are arranged regularly. The third in the printed layer, the printed matter according to claim 1, wherein the first pixel and the second pixel are arranged irregularly. The proportion of the first pixel in the third printed layer, wherein the first printed layer towards the second printed layer, the printed matter according to any one of 3 claims 1 is decreasing . The printed matter according to any one of claims 1 to 4 , wherein a ratio of the second pixels in the third print layer increases from the first print layer toward the second print layer. . The printed matter according to any one of claims 1 to 5 , wherein a width of the third printed layer is 0.35 mm or more. 7. The viscosity of the droplet of the first ink when forming the third printed layer is within ± 10% of the viscosity of the droplet of the second ink. 7. Prints. The size of the first ink droplet when forming the third printed layer is within ± 10% of the size of the second ink droplet . Printed matter.   The printed matter according to any one of claims 1 to 8, wherein a color difference between the first printed layer and the second printed layer when measured with a chromaticity meter is 2 or less. The first print layer and the second print layer are arranged apart from each other,
The printed matter according to claim 1, wherein the third printed layer is provided so as to fill a gap between the first printed layer and the second printed layer. The substrate has a first processing region to be deformed,
The printed matter according to claim 1, wherein the first ink layer is provided in the first processing region.   The printed matter according to claim 11, wherein the deformation processing is performed. The substrate has a second processing region to be sheared,
The printed matter according to claim 1, wherein the second ink layer is provided in the second processing region.   The printed matter according to claim 13, which has been subjected to the shearing process.   The printed matter according to claim 1, wherein the property is a physical property or a chemical property. The first printed layer is formed by ejecting and applying the first ink as a droplet from a nozzle by an inkjet method,
The second printed layer is formed by ejecting and applying the second ink as droplets from a nozzle by an inkjet method,
16. The third printing layer is formed by ejecting and applying the first ink and the second ink as droplets from a nozzle by an inkjet method, respectively. Prints. Each of the first ink, the second ink, and the third ink is a radiation curable ink,
The first printed layer is obtained by ejecting and applying the first ink as a droplet from a nozzle by an inkjet method, and irradiating and curing the radiation.
The second printed layer is obtained by ejecting and applying the second ink as droplets from a nozzle by an ink jet method, and curing by irradiation with radiation.
2. The third printed layer is obtained by applying the first ink and the second ink by ejecting them as droplets from a nozzle by an ink jet method, and irradiating them with radiation to cure them. The printed matter according to any one of 15. The first printing layer formed of the first ink and the second printing layer formed of the second ink having different characteristics or functions and having a color difference, the first ink, and the second ink A third printed layer that forms a mixed region containing the first ink, and the first printed layer and the second printed layer are arranged in different regions on the substrate, and the third printed layer Is a method of manufacturing a printed matter that is printed so as to cover or fill a boundary between the first printed layer and the second printed layer ,
The third print layer includes a plurality of first pixels printed using the first ink and a plurality of second pixels printed using the second ink. ,
The method of manufacturing a printed material , wherein a ratio between the first pixel and the second pixel changes from the first print layer toward the second print layer .

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