JP2021017051A - Producing method of printed matter and producing apparatus of printed matter, and printed matter - Google Patents

Abstract

To provide a producing method of printed matters, which is excellent in wetting and spreading of a dropped ink to base materials having different surface states, can suppress deterioration of dot image quality due to coalescence and color mixture of the dropped ink, and can produce printed matters having high toughness.SOLUTION: A production method of printed matters comprises the steps of: forming an intermediate layer on a base material 19; forming an ink receiving layer by imparting an ink receiving layer forming liquid to the intermediate layer; and forming an image by imparting an ink to the ink receiving layer by an inkjet method, in which the viscosity of the ink receiving layer forming liquid at 25°C is 40 mPa s or larger.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for producing a printed matter, an apparatus for producing a printed matter, and a printed matter.

In recent years, digital printing by the inkjet method has come to be used for printing on resins, metals, glass, wood, and composite materials thereof in addition to paper.

In particular, attempts have been made to print on resin films, resin-impregnated papers, wood boards (MDF boards, particle boards, veneer boards), which are base materials used for floor materials, wall materials, packaging materials, and the like. In addition to solvent inks, water-based latex inks and UV inks are used for printing these inks from the viewpoint of VOC-free, and inks such as photopolymerization initiators are added from the viewpoint of low drying energy and quality and safety. EB ink that does not require an agent is also used.

For example, a method has been proposed in which an image is formed by applying a second active energy ray-curable liquid containing a coloring material on a first active energy ray-curable liquid by an inkjet method (). For example, see Patent Documents 1 and 2).

INDUSTRIAL APPLICABILITY The present invention is excellent in wet spread of dropped ink on substrates having different surface conditions, can suppress deterioration of dot image quality due to coalescence of dropped ink, color mixing, etc., and is a highly robust printed matter. It is an object of the present invention to provide a method for producing a printed matter capable of producing.

The method for producing a printed matter of the present invention includes an intermediate layer forming step of forming an intermediate layer on a base material, and an ink receiving layer forming step of applying an ink receiving layer forming liquid to the intermediate layer to form an ink receiving layer. The image forming step of applying ink to the ink receiving layer by an inkjet method to form an image is included, and the viscosity of the ink receiving layer forming liquid at 25 ° C. is 40 mPa · s or more.

According to the present invention, it is possible to excellently wet and spread the dropped ink on substrates having different surface conditions, suppress deterioration of dot image quality due to coalescence of the dropped ink and color mixing, and have high robustness. It is possible to provide a method for producing a printed matter which can produce a printed matter.

FIG. 1 is a conceptual diagram showing an example of a printed matter manufacturing apparatus of the present invention.

(Printed matter manufacturing method and printed matter manufacturing equipment)
The method for producing a printed matter of the present invention includes an intermediate layer forming step of forming an intermediate layer on a base material, and an ink receiving layer forming step of applying an ink receiving layer forming liquid to the intermediate layer to form an ink receiving layer. Including an image forming step of applying ink to the ink receiving layer by an inkjet method to form an image, the viscosity of the ink receiving layer forming liquid at 25 ° C. is 40 mPa · s or more, and further, if necessary. And other steps are included.
The printed matter manufacturing apparatus of the present invention includes an intermediate layer forming means for forming an intermediate layer on a substrate, and an ink receiving layer forming means for applying an ink receiving layer forming liquid to the intermediate layer to form an ink receiving layer. The ink receiving layer is provided with an image forming means for forming an image by applying ink to the ink receiving layer by an inkjet method, and the viscosity of the ink receiving layer forming liquid at 25 ° C. is 40 mPa · s or more, which is more necessary. Depending on the other means.
The method for producing a printed matter of the present invention can be suitably carried out using the printed matter manufacturing apparatus of the present invention, and the intermediate layer forming step can be preferably carried out by the intermediate layer forming means, and the ink receiving. The layer forming step can be preferably carried out by the ink receiving layer forming means, the image forming step can be preferably carried out by the image forming means, and the other steps are preferably carried out by the other means. can do.

The present inventors have excellent wet spread of the dropped ink on substrates having different surface conditions, can suppress deterioration of dot image quality due to coalescence of the dropped ink and color mixing, and have high robustness. As a result of examining a method for producing a printed matter capable of producing a high-quality printed matter, the following findings were obtained.
In the conventional technique, in inkjet printing for resin films, resin-impregnated papers, and wood boards, the base material used (particularly, the surface state of the base material, or the ink receiving layer previously applied to the surface of the base material, etc. There is a problem that the image quality changes depending on the surface condition). In particular, the spread of the ink droplet dot gain and the coalescence and color mixing of adjacent ink droplets largely depend on the surface state of the base material (or the surface state of the ink receiving layer formed on the surface of the base material). The relationship between image quality and surface parameters such as unevenness characteristics, surface energy, penetrability, and non-penetration, which represent the characteristics of, has not been completely clarified. Ink droplet dot gain on the substrate and adjacent ink The coalescence of droplets and the suppression of color mixing were not compatible. Therefore, sufficient image quality has not been obtained. In addition, the adhesion between the base material and the image (ink) is weak, and the image is peeled off by rubbing or scratching, which causes a problem in robustness.

Therefore, the present inventors homogenize the surface texture (surface roughness, wettability, etc.) of the base material by providing an intermediate layer on the surface of the base material, thereby achieving stable image quality regardless of the base material. I found that I could get it. Further, by forming the ink receiving layer and the image on the intermediate layer using the ink receiving layer forming liquid and the ink having specific properties, the amount of ink used is reduced because the ink spreads well. I found that I could make it. Further, an ink having a uniform film thickness (average thickness) regardless of the substrate by providing the intermediate layer and forming an ink receiving layer and an image using an ink receiving layer forming liquid and ink having specific properties. It is possible to partially bury the ink in the receiving layer and suppress the coalescence of the ink dots due to the spread of wetness. In the present invention, the present inventors can obtain an image with high color uniformity and image quality (high definition, high resolution) because wet spread occurs while avoiding coalescence of ink dots, and ejects the ink. It was found that the effect of suppressing streaks due to turbulence and the color mixing that is the bleeding between colors can be suppressed.

<Intermediate layer forming step and intermediate layer forming means>
The intermediate layer forming step is a step of forming an intermediate layer on a base material.
The intermediate layer forming means is a means for forming an intermediate layer on a base material.
The intermediate layer forming step can be preferably carried out by the intermediate layer forming means.

-Base material-
The base material is not particularly limited and may be appropriately selected depending on the intended purpose. For example, resin film, resin-impregnated paper, synthetic paper made of synthetic fibers, natural paper, sheets such as non-woven fabric, cloth, leather, etc. Examples include wood, metal sheets, and glass plates.
Examples of the resin film include a polyester film; a polypropylene film; a polyethylene film; a plastic film such as nylon, vinylon, and acrylic, or a film obtained by laminating the films.
The resin film is not particularly limited and may be appropriately selected depending on the intended purpose, but from the viewpoint of strength, a uniaxially or biaxially stretched resin film is preferable.
Examples of the non-woven fabric include those obtained by spraying polyethylene fibers in a sheet shape and thermocompression bonding to form a sheet shape.
Examples of the wood include plywood such as MDF, HDF, particle board, and veneer, and a decorative board having a sheet bonded to the surface. The average thickness of these is preferably 2 mm or more and 30 mm or less.
Examples of the early glass plate include float glass, colored glass, tempered glass, wire-reinforced glass, frosted glass, frosted glass, and mirror glass. The average thickness of these is preferably 0.3 mm or more and 20 mm or less.

− Intermediate layer−
The intermediate layer is particularly limited as long as the surface texture (surface roughness, wettability, etc.) of the base material can be homogenized and the ink receiving layer described later can be formed on the surface of the intermediate layer. However, it can be appropriately selected according to the purpose.
The surface texture (for example, surface roughness, wettability, etc.) of the base material differs depending on the base material, and when the ink receiving layer forming liquid is directly applied to the base material, the outermost surface of the ink receiving layer May not be uniform. For example, when wood is used as the base material, the surface of the wood may not be smooth, and the liquid may not be properly wetted and spread due to its high absorbency. By providing the intermediate layer on the base material, a uniform ink receiving layer can be provided even on base materials having different surface textures. As a result, it is possible to prevent the printed matter from having changed in image quality and image due to the difference in the type of the base material used.
Further, for example, in a building, an image using a resin film as a base material of the printed matter and an image using wood as the base material may be arranged adjacent to each other. When images using different base materials are adjacent to each other, if there is a gap between the images, the images cannot be properly joined. According to the present invention, it is possible to suppress image deviation and image quality difference due to the base material, and it is possible to form a printed matter without a sense of discomfort.
Further, by providing the intermediate layer, the adhesion of the ink receiving layer to the base material can be improved.

The material for forming the intermediate layer is not particularly limited and may be appropriately selected depending on the intended purpose. For example, urethane resin, (meth) acrylic resin, (meth) acrylic-urethane copolymer resin, acrylic polyol. Examples thereof include urethane-based resins containing, as a main component, vinyl chloride-vinyl acetate copolymers, polyester resins, butyral resins, chlorinated polypropylene, chlorinated polyethylene and the like. Further, examples thereof include those obtained by dissolving these materials in a solvent such as methyl ethyl ketone, dioxane, hexane, ethyl acetate and butyl acetate (solvent type resin). Examples of commercially available solvent-based resins include Fine Tack CT-3088, CT-3850, CT-5020, CT-5030, CT-6030, Quickmaster SPS-900-LV, SPS-945NT, SPS-1040NT-25 ( DIC Corporation) and the like.
Examples of the material forming the intermediate layer include acrylic resin, vinyl acetate resin, styrene-butadiene resin, vinyl chloride resin, acrylic-styrene resin, butadiene resin, styrene resin, and epoxy resin. Examples thereof include a resin emulsion in which a resin is dispersed in an aqueous dispersion medium such as water. The volume average particle diameter of these resin components is not particularly limited as long as an emulsion is formed, and is preferably 150 nm or less, more preferably 5 nm or more and 100 nm or less. Examples of commercially available resin emulsions include Boncoat W-26 and W-386 (manufactured by DIC Corporation).

Further, as the material for forming the intermediate layer, it is preferable to contain an active energy ray-curable liquid and a resin powder.
Examples of the active energy ray-curable liquid include the same components as the ink receiving layer forming liquid described later.
Examples of the resin powder include crosslinked acrylic particles and crosslinked methacryl particles. Commercially available products include crosslinked acrylic monodisperse particles MX-100 (manufactured by Soken Kagaku Co., Ltd.) and crosslinked methacryl particles tough tick AR650 (manufactured by Nippon Exlan Industry Co., Ltd.). ) And so on. Further, examples of the sheet used as the lamination method include a hot melt film and the like, and examples thereof include a clamper (manufactured by Kurabo Industries Ltd., polyolefin-based, polyester-based, polyurethane-based) and the like.

The average thickness of the intermediate layer is, for example, preferably 0.1 μm or more and 5 μm or less, and more preferably 0.5 μm or more and 3 μm or less.

The method for forming the intermediate layer on the base material is not particularly limited and may be appropriately selected depending on the intended purpose. The material may be used as it is or in a state of being dissolved or dispersed in a solvent. It can be carried out by applying by a known printing method, coating method or the like, drying and curing. For example, a method in which a liquid that is a material for forming an intermediate layer is applied, a liquid in which a resin is dissolved or dispersed is applied to a base material, and then the solvent is dried to form an intermediate layer, or a liquid that is a material for the intermediate layer is used. After coating, there is a method of forming an intermediate layer by curing by irradiation with active energy rays. Other methods include a method of laminating an adhesive sheet as an intermediate layer, a method of applying resin powder and fixing by thermocompression bonding, and the like.
The method for applying the liquid, the melt, and the powder as the components of the intermediate layer on the base material (the intermediate layer forming means) is not particularly limited and may be appropriately selected depending on the intended purpose. For example, knife coating method, nozzle coating method, die coating method, lip coating method, comma coating method, gravure coating method, rotary screen coating method, reverse roll coating method, roll coating method, spin coating method, kneader coating method, bar coating method. , Blade coating method, casting method, dip method, curtain coating method and other coating methods, spray, dispenser, inkjet method and the like.

In addition, when forming the intermediate layer, the base material is subjected to easy-adhesion treatment such as corona discharge treatment, plasma treatment, chromium oxidation treatment, flame treatment, hot air treatment, ozone / ultraviolet treatment, etc., to bond the base material to the ink receiving layer. Adhesion can also be improved.

<Ink receiving layer forming step and ink receiving layer forming means>
The ink receiving layer forming step is a step of applying an ink receiving layer forming liquid to the intermediate layer to form an ink receiving layer.
The ink receiving layer forming means is a means for applying an ink receiving layer forming liquid to the intermediate layer to form an ink receiving layer.
The ink receiving layer forming step can be preferably carried out by the ink receiving layer forming means.

-Ink receiving layer forming liquid-
The ink receiving layer forming liquid is a liquid for forming an ink receiving layer for receiving ink, which will be described later, and contains a polymerizable compound, and contains a polymerization initiator, a polymerization accelerator, a surfactant, and a pigment. It is preferable to use the above, and if necessary, other components are contained.

Further, in the present invention, the viscosity of the ink receiving layer forming liquid at 25 ° C. is preferably 40 mPa · s or more and 40 mPa · s or more and 20,000 mPa · s or less. When the viscosity of the ink receiving layer forming liquid at 25 ° C. is 40 mPa · s or more, the effect of suppressing the movement of dots after landing (the movement of ink dots from a desired landing position, which tends to occur at low viscosity). Can be improved.
The viscosity can be measured, for example, with an Anton Pearl rheometer MCR301 using a cone plate CP25-1 at a shear rate of 10 / s at 25 ° C.

The static surface tension γ ₁ of the ink receiving layer forming liquid at 25 ° C. is preferably 60 mN / m or less, more preferably 40 mN / m or less.
When the static surface tension of the ink receiving layer forming liquid is within the above numerical range, the ink can be wetted and spread on the surface of the ink receiving layer.
The static surface tension can be measured by, for example, a plate method or a ring method with an automatic surface tension meter DY-300 manufactured by Kyowa Interface Science.
Further, the difference (γ ₁ −γ ₂ ) between the static surface tension γ ₁ of the ink receiving layer forming liquid at 25 ° C. and the static surface tension γ _{2 of the} ink described later is −20 mN / m or more and 20 mN / m. The following is preferable, and more preferably −10 mN / m or more and 10 mN / m or less.

The polymerizable compound is a monomer or oligomer containing a functional group such as a vinyl group, an acryloyl group, or a methacryloyl group in the molecular structure, and is a monofunctional monomer having one functional group or a polyfunctional monomer having one or more functional groups. , Polyfunctional oligomers, urethane acrylate oligomers depending on the type of molecular structure, epoxy acrylate oligomers, polyester acrylate oligomers and the like.

Examples of the monofunctional monomer include γ-butyrolactone (meth) acrylate, isobornyl (meth) acrylate, formalized trimethylolpropane mono (meth) acrylate, trimethylrolpropane (meth) acrylic acid benzoic acid ester, and (meth) acryloyl. Morpholine, 2-hydroxypropyl (meth) acrylamide, N-vinylcaprolactam, N-vinylpyrrolidone, N-vinylformamide, cyclohexanedimethanol monovinyl ether, hydroxyethyl vinyl ether, diethylene glycol monovinyl ether, dicyclopentadiene vinyl ether, tricyclodecane vinyl ether , Benzyl vinyl ether, ethyloxetane methyl vinyl ether, hydroxybutyl vinyl ether, ethyl vinyl ether, ethoxy (4) nonylphenol (meth) acrylate, benzyl (meth) acrylate, caprolactone (meth) acrylate and the like. These may be used alone or in combination of two or more.

Examples of the polyfunctional monomer include ethylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate of hydroxypivalate, polytetramethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, and trimethylolpropane di. (Meta) acrylate, tetraethylene glycol di (meth) acrylate, polyethylene glycol dimethacrylate [CH ₂ = CH-CO- (OC ₂ H ₄ ) n-OCOCH = CH ₂ (n≈9), same (n≈14) , Same (n≈23)], Dipropylene glycol di (meth) acrylate, Tripropylene glycol di (meth) acrylate, Polypropylene glycol dimethacrate [CH ₂ = C (CH ₃ ) -CO- (OC ₃ H ₆ ) _n- OCOC (CH ₃ ) = CH ₂ (n≈7)], 1,3-butanedioldi (meth) acrylate, 1,4-butanedioldi (meth) acrylate, 1,6-hexanedioldi (meth) ) Acrylic, 1,9-nonanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, trimethylolpropane dimethanol di (meth) acrylate, propylene oxide-modified bisphenol A di (meth) acrylate, polyethylene glycol di ( Meta) acrylate, dipentaerythritol hexa (meth) acrylate, propylene oxide-modified tetramethylolmethanetetra (meth) acrylate, dipentaerythritol hydroxypenta (meth) acrylate, caprolactone-modified dipentaerythritol hydroxypenta (meth) acrylate, ditrimethylolpropane Tetra (meth) acrylate, pentaerythritol tetra (meth) acrylate, trimethylolpropane tri (meth) acrylate, ethylene oxide-modified trimethylolpropane tri (meth) acrylate, propylene oxide-modified trimethylolpropane tri (meth) acrylate, caprolactone-modified tri Methylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, tris (2-hydroxyethyl) isocyanurate tri (meth) acrylate, ethoxylated neopentyl glycol di (meth) acrylate, propylene oxide-modified neopentyl glycol di ( Meta) acrylate, professional Pyreneoxide-modified glyceryl tri (meth) acrylate, polyester di (meth) acrylate, polyester tri (meth) acrylate, polyester tetra (meth) acrylate, polyester penta (meth) acrylate, polyester poly (meth) acrylate, polyurethane di (meth) Acrylate, polyurethane tri (meth) acrylate, polyurethane tetra (meth) acrylate, polyurethane penta (meth) acrylate, polyurethane poly (meth) acrylate, triethylene glycol divinyl ether, cyclohexanedimethanol divinyl ether, diethylene glycol divinyl ether, triethylene glycol di Examples thereof include vinyl ether and ethoxylated (4) bisphenol di (meth) acrylate. These may be used alone or in combination of two or more.

Further, a mixed composition of each combination of the monofunctional monomer and the polyfunctional monomer and the monofunctional monomer and the polyfunctional oligomer may be used. In that case, from the viewpoint of robustness, the total amount of the ink receiving layer forming liquid may be increased. The polyfunctional monomer and the polyfunctional oligomer are preferably 50% by mass or more.

As the polymerization initiator, for example, if it is possible to generate active species such as radicals and cations by the energy of active energy rays or heat and initiate the polymerization of the ink receiving layer forming liquid. Good. As the polymerization initiator, known radical polymerization initiators, cationic polymerization initiators, base generators and the like can be used alone or in combination of two or more, and among these, a radical polymerization initiator is used. Is preferable. Further, the polymerization initiator is preferably contained in an amount of 1% by mass or more and 20% by mass or less based on the total amount of the ink receiving layer forming liquid in order to obtain a sufficient curing rate.
Examples of the radical polymerization initiator include aromatic ketones, acylphosphine oxide compounds, aromatic onium salt compounds, organic peroxides, thio compounds (thioxanthone compounds, thiophenyl group-containing compounds, etc.), hexaarylbiimidazole compounds, and the like. Examples thereof include ketooxime ester compounds, borate compounds, azinium compounds, metallocene compounds, active ester compounds, compounds having a carbon halogen bond, and alkylamine compounds.

The polymerization accelerator is not particularly limited and may be appropriately selected depending on the intended purpose. For example, trimethylamine, methyldimethanolamine, triethanolamine, p-diethylaminoacetophenone, ethyl p-dimethylaminobenzoate, p. Examples thereof include amine compounds such as -2-ethylhexyl-dimethylaminobenzoate, N, N-dimethylbenzylamine, and 4,4'-bis (diethylamino) benzophenone. The content of the polymerization accelerator is not particularly limited and may be appropriately set according to the polymerization initiator used and the amount thereof.

The surfactant is not particularly limited and may be appropriately selected depending on the intended purpose. For example, glycerin fatty acid ester, sorbitan fatty acid ester, polyethylene glycol fatty acid ester, glyceryl monostearate, glyceryl monooleate, mono. Glycerin fatty acid esters such as diglyceryl stearate and diglyceryl monoisostearate, glycol fatty acid esters such as propylene glycol monostearate, sorbitan fatty acid esters such as sorbitan monostearate and sorbitan monooleate, sucrose stearic acid esters, POE ( 4.2) Lauryl ether, POE (40) hardened castor oil, POE (10) cetyl ether, POE (9) lauryl ether, POE (10) oleyl ether, monooleic acid POE (20) sorbitan, monolaurate POE (6) ) Sorbit, POE (15) cetyl ether, monopalmitate POE (20) sorbitan, POE (15) oleyl ether, POE (100) hardened castor oil, POE (20) POP (4) cetyl ether, POE (20) cetyl Ether, POE (20) oleyl ether, POE (20) stearyl ether, POE (50) oleyl ether, POE (25) cetyl ether, POE (25) lauryl ether, POE (30) cetyl ether, POE (40) cetyl ether And so on. These may be used alone or in combination of two or more.
The content of the surfactant is preferably 0.1% by mass or more and 2% by mass or less with respect to the total amount of the ink receiving layer forming liquid.

Examples of the pigment include white pigments, metal powder pigments, pearl luster pigments, fluorescent pigments and the like.
Examples of the white pigment include titanium dioxide, aluminum oxide, calcium carbonate, magnesium carbonate, calcium sulfate, barium sulfate, silica sand, clay, talc, silica and the like.

The other components are not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include organic solvents, thickeners, dispersants, deodorants, ultraviolet blocking agents, antibacterial agents and rust preventives. Can be mentioned.

The method for preparing the ink receiving layer forming liquid can be prepared by mixing the above-mentioned various components, and the preparation means and conditions thereof are not particularly limited. For example, a polymerizable monomer, a pigment, a dispersant and the like are ball milled. , Kitty mill, disc mill, pin mill, dyno mill, etc., and disperse to prepare a pigment dispersion, and further add a polymerizable monomer, initiator, polymerization inhibitor, surfactant, etc. to the pigment dispersion. It can be prepared by mixing.

The method for applying the ink receiving layer forming liquid on the base material is not particularly limited and may be appropriately selected depending on the intended purpose. For example, knife coating method, nozzle coating method, die coating method, lip coating method, comma coating method, gravure coating method, rotary screen coating method, reverse roll coating method, roll coating method, spin coating method, kneader coating method, bar coating method. , Blade coating method, casting method, dip method, coating method such as curtain coating method, inkjet method and the like.

The average thickness of the ink receiving layer after curing is not particularly limited as long as a stable high image quality and robust printed matter can be obtained regardless of the substrate, and can be appropriately selected depending on the intended purpose. For example, 1 μm or more and 100 μm or less is preferable, and 2 μm or more and 10 μm or less is more preferable. When the average thickness of the ink receiving layer after curing is 1 μm or more and 100 μm or less, the dot spread of the applied ink can be improved.
As a method of obtaining the average thickness of the ink receiving layer after curing, the ink receiving layer after curing is scraped off at five different locations, and the height from the base material to the surface of the ink receiving layer at that portion is determined by, for example, Keyence. Measure with a laser microscope VK-X100 and calculate the average value. It is obtained by dividing the average thickness of the intermediate layer from the calculated average value.

Further, before forming the ink receiving layer, it is preferable to apply a surface treatment such as a corona treatment to the intermediate layer to improve the uniformity of the coating film of the ink receiving layer.

<Image forming process and image forming means>
The image forming step is a step of applying ink to the ink receiving layer by an inkjet method to form an image.
The image forming means is a means for forming an image by applying ink to the ink receiving layer by an inkjet method.
The image forming step can be preferably carried out by the image forming means.
The "image" in the present invention includes all printed images (characters, figures, symbols, photographs, solid images, etc.) using the ink.
In the image forming step, the ink is applied to the surface of the ink receiving layer.

-Ink-
The ink preferably contains a polymerizable compound, a polymerization initiator and a coloring material, and further contains other components as necessary.

--Polymerizable compound ---
As the polymerizable compound, the same compound as the ink receiving layer forming liquid can be used.
It is preferable that the polymerizable compound in the ink contains a monofunctional monomer and a polyfunctional monomer.

--Polymerization initiator ---
As the polymerization initiator, the same one as the ink receiving layer forming liquid can be used.

--Color material ---
As the coloring material, various colors such as black, magenta, cyan, yellow, green, orange, purple, white, and glossy colors such as gold and silver are imparted according to the purpose and required characteristics of the ink in the present invention. Pigments can be used.
The content of the coloring material may be appropriately determined in consideration of a desired color density, dispersibility in the ink, etc., and is not particularly limited, but is 0.1% by mass or more and 20% by mass with respect to the total amount of the ink. The following is preferable.
Inorganic pigments and organic pigments can be used as the coloring material. These may be used alone or in combination of two or more.
As the inorganic pigment, for example, carbon black (CI pigment black 7) such as furnace black, lamp black, acetylene black, and channel black, iron oxide, and titanium oxide can be used.
Examples of the organic pigment include azo pigments such as insoluble azo pigments, condensed azo pigments, azolakes and chelate azo pigments, phthalocyanine pigments, perylene and perinone pigments, anthraquinone pigments, quinacridone pigments, dioxane pigments, thioindigo pigments and isoindolinone pigments. Polycyclic pigments such as quinophthalone pigments, dye chelate (for example, basic dye type chelate, acidic dye type chelate, etc.), dyeing rake (for example, basic dye type rake, acidic dye type rake, etc.), nitro pigment, nitroso pigment , Aniline black and the like.
Further, in order to improve the dispersibility of the pigment, a dispersant may be further contained.
The dispersant is not particularly limited, and examples thereof include dispersants commonly used for preparing pigment dispersions such as polymer dispersants.

As the ink, the ink containing the color material may be referred to as a color ink (sometimes simply referred to as ink), and the ink not containing the color material may be referred to as a clear ink. Further, the region where the ink (color ink) is ejected may be referred to as an image region, and the region where the clear ink is ejected may be referred to as a non-image region.
It is preferable that the clear ink is ejected or formed as dots other than the image region (non-image region) of the ink or at least around the boundary between the image region and the non-image region. By ejecting or forming dots of the clear ink other than the image region (non-image region) of the ink or at least around the boundary between the image region and the non-image region, the effect of suppressing ink bleeding at the image edge is improved. Can be done.

--Other ingredients ---
The other components are not particularly limited and may be appropriately selected depending on the intended purpose. For example, an organic solvent, a surfactant, a polymerization inhibitor, a leveling agent, a defoaming agent, a fluorescent whitening agent, and a penetration promoting agent. Examples thereof include agents, wetting agents (moisturizers), fixing agents, viscosity stabilizers, rust inhibitors, preservatives, antioxidants, and ultraviolet absorbers.
It is preferable not to contain the organic solvent if possible. If the composition does not contain the organic solvent, particularly a volatile organic solvent (VOC (Volatile Organic Compounds) free), the safety of the place where the composition is handled is further enhanced, and it is possible to prevent environmental pollution. It becomes. The “organic solvent” means, for example, a general non-reactive organic solvent such as ether, ketone, xylene, ethyl acetate, cyclohexanone, and toluene, and should be distinguished from the reactive monomer. is there. Further, "not containing" the organic solvent means that it is substantially not contained, and it is preferably less than 0.1% by mass.

The ink can be prepared by using the above-mentioned various components, and the preparation method and conditions thereof are not particularly limited. For example, a polymerizable monomer, a pigment, a dispersant and the like can be used in a ball mill, a kitty mill, or a disc. Prepared by putting it in a disperser such as a mill, pin mill, or dyno mill, and dispersing it to prepare a pigment dispersion, and further mixing the pigment dispersion with a polymerizable monomer, an initiator, a polymerization inhibitor, a surfactant, and the like. can do.

The static surface tension γ ₂ of the ink at 25 ° C. is not particularly limited, and is preferably 20 mN / m or more and 100 mN / m or less, preferably 40 mN / m or less, and more preferably 30 mN / m or less. When the static surface tension γ _{2 of the} ink at 25 ° C. is 20 mN / m or more and 100 mN / m or less, the dropped ink can be suitably wetted and spread. When the static surface tension of the ink at 25 ° C. is 20 mN / m or more and 40 mN / m or less, the wett spread of the dropped ink can be improved, which is particularly preferable.

The viscosity of the ink used in the present invention is not particularly limited as long as it can be ejected from the nozzle of the inkjet head, and can be appropriately selected depending on the intended purpose. The viscosity at the ejection temperature is 3 mPa · s or more and 40 mPa. -S or less is preferable, 5 mPa · s or more and 15 mPa · s or less is more preferable, and 6 mPa · s or more and 12 mPa · s or less is further preferable.

As the inkjet method, for example, as the drive method of the discharge head, an on-demand type head using a piezoelectric element actuator using PZT or the like, a method of applying thermal energy, an actuator using electrostatic force, or the like is used. Alternatively, a continuous injection type charge control type head or the like can be used.

The ink is three types, four types, or more types of ink depending on the color material (pigment) contained, and each is applied by an individual inkjet head. Further, one head may have a plurality of nozzle rows, and a head that ejects different types of ink from each nozzle row may be used. The head nozzle density required for each color varies depending on the desired image resolution and the number of scans. The head nozzle density includes, for example, 240 npi (nozzle per inch), 300 npi, 600 npi, 1,200 npi and the like.

The volume of the ink ejected from the inkjet head per droplet is preferably 1 pL or more and 50 pL or less, and more preferably 2 pL or more and 15 pL or less. When the volume of the ink ejected from the inkjet head per droplet is 1 pL or more and 50 pL or less, unnecessary coalescence, color mixing, and color gamut reduction can be suppressed.

The ejection speed of the ink droplets is preferably 5 m / s or more and 15 m / s or less, and more preferably 7 m / s or more and 10 m / s or less. When the ejection speed of the ink droplets is 5 m / s or more and 15 m / s or less, the ejection can be stably performed.

The dot density (image resolution) of the ejected droplets is preferably 240 dpi × 240 dpi (dot per inch) or more.

The overlap of the ejection times of the plurality of inks, for example, black ink, cyan ink, magenta ink, and yellow ink (time difference when each ink lands at the same position) is preferably short, preferably within 1 second, and is preferably 0.5. More preferably within seconds.

The order of applying or ejecting the ink receiving layer forming liquid, the ink (here, color ink), and clear ink similar to the ink and containing no coloring material is either (A) or (B) below. Is.
(A) Ink receiving layer forming liquid, ink, clear ink in order (B) Ink receiving layer forming liquid, clear ink, ink in order It is preferable that the overlap of the ejection time of the ink and the clear ink is short, within 1 second. Is preferable.

The average thickness of the image formed by the ink after curing is not particularly limited and can be appropriately selected depending on the intended purpose, preferably 1 μm or more and 20 μm or less, and more preferably 1 μm or more and 10 μm or less. The average thickness of the image formed by the clear ink is not particularly limited and can be appropriately selected depending on the intended purpose, and is preferably 1 μm or more and 20 μm or less.
Further, in the present invention, it is preferable that the average thickness of the image formed by the ink is thinner than the average thickness of the ink receiving layer formed by the ink receiving layer forming liquid. The ink can be embedded in the ink receiving layer forming liquid by making the average thickness of the image formed by the ink thinner than the average thickness of the ink receiving layer formed by the ink receiving layer forming liquid. As a result, a printed matter having high robustness can be obtained. The difference between the average thickness of the ink receiving layer formed by the ink receiving layer forming liquid and the average thickness of the image formed by the ink is preferably 100 μm or less.
Further, in the present invention, the sum of the average thickness of the ink receiving layer formed by the ink receiving layer forming liquid and the average thickness of the image formed by the ink is preferably 1 μm or more and 100 μm or less. When the sum of the average thickness of the ink receiving layer formed by the ink receiving layer forming liquid and the average thickness of the image formed by the ink is 1 μm or more and 100 μm or less, stable and high image quality regardless of the substrate. And a robust printed matter can be obtained.
As a method of obtaining the average thickness, the ink layer (image) and the ink receiving layer after curing at five different locations are scraped off, and the height from the base material to the surface of the image (ink layer) at that portion is determined by, for example, a Keyence laser. Measure with a microscope VK-X100 and calculate the average value. It is obtained by dividing the average thickness of the intermediate layer and the ink receiving layer from the calculated average value.

<Other processes and other means>
The other steps are not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a curing step, a heating step, an embossing step, and a bending step.
The other means are not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include curing means, heating means, embossing means, bending means and the like.
The other steps can be preferably carried out by the other means.

<< Curing process and curing means >>
The curing step is a step of curing the ink receiving layer and the image (ink layer) by an external stimulus.
The curing means is a means for curing the ink receiving layer and the image (ink layer) by an external stimulus.
By curing the ink receiving layer and the image (ink layer), an integrated cured product can be obtained.

The external stimulus is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include active energy rays and heat.

In addition to ultraviolet rays, the active energy rays can impart energy necessary for advancing the polymerization reaction of polymerizable components in the composition, such as electron beams, α rays, β rays, γ rays, and X-rays. It suffices, and is not particularly limited. In particular, when a high-energy light source is used, the polymerization reaction can proceed without using a polymerization initiator. Further, in the case of ultraviolet irradiation, mercury-free is strongly desired from the viewpoint of environmental protection, and replacement with a GaN-based semiconductor ultraviolet light emitting device is very useful industrially and environmentally. Further, the ultraviolet light emitting diode (UV-LED) and the ultraviolet laser diode (UV-LD) are compact, have a long life, have high efficiency, and are low in cost, and are preferable as an ultraviolet light source.

The curing conditions are not particularly limited and may be appropriately selected depending on the intended purpose, but in the case of ultraviolet rays, it is preferable to use an irradiation device capable of irradiating with an intensity of 6 W / cm ² or more at an irradiation distance of 2 mm.
In the case of an electron beam, it is preferable that the acceleration voltage is 15 kGy or more at a location farthest from the electron beam irradiator to be cured.

The curing step is preferably performed within 10 seconds after the ink is ejected to the ink receiving layer. When the curing step is within 10 seconds, it is possible to suppress image distortion caused by the ink.
Further, when the clear ink is ejected, it means that it is within 10 seconds from the time when the ink (color ink) and the clear ink are ejected.

<< Heating process and heating means >>
The heating step is a step of heating and leveling the ink receiving layer and the image (ink layer) before curing.
The heating means is a means for heating and leveling the ink receiving layer and the image (ink layer) before curing.
When the heating step is performed, it is performed before the curing step.
The heating means is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include an infrared heater and a hot air heater.
The heating temperature is preferably, for example, 40 ° C. or higher and 100 ° C. or lower. When the heating temperature is 40 ° C. or higher and 100 ° C. or lower, distortion of the image of the ink can be suppressed.

<< Embossing process and embossing means >>
The embossing process is a process of forming an uneven pattern on a printed matter.
The embossing means is a means for forming an uneven pattern on a printed matter.
In the embossing process, methods such as embossing, chemical embossing, rotary screen processing, and raised printing, which are usually used for the purpose of imparting unevenness to wallpaper, decorative materials, etc., can be appropriately selected and used. it can.

Examples of the embossing means include a means for embossing with a cooling roller after heating, a means for embossing at once using a hot roller embossing, and the like.
The embossing depth by embossing is preferably 0.08 mm or more and 0.50 mm or less. When the embossing depth is 0.08 mm or more, a three-dimensional effect can be obtained, and when it is 0.50 mm or less, the wear strength of the surface can be improved.
Examples of the shape of the uneven pattern formed by the embossing include a wood grain conduit groove, a stone plate surface unevenness, a cloth surface texture, a satin finish, a grain, a hairline, and a perforated groove.

The printed matter produced by the method for producing a printed matter of the present invention and the apparatus for producing a printed matter of the present invention has excellent wet spread of the dropped ink on a substrate having different surface textures, and the combined ink and the dropped ink are combined. Since deterioration of image quality due to color mixing can be suppressed and printed matter with high robustness can be produced, for example, construction of floor materials, wallpaper, interior materials, wall materials, width wood, ceiling materials, pillars, etc. Suitable for applications such as materials.

Here, the method for producing a printed matter of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic view showing an example of a printed matter manufacturing apparatus of the present invention. The printed matter manufacturing apparatus 100 of FIG. 1 has a means for forming an intermediate layer on the base material 19 (not shown) and a coating roller 10 for applying an ink receiving layer forming liquid (ink receiving layer) onto the intermediate layer. A head 11 for applying clear ink by the inkjet method downstream thereof, and a black head 12, a magenta head 13, and cyan as a head for applying a plurality of inks (color inks) further downstream by the inkjet method. It has a discharge head unit 16 including a head 14 for ink and a head 15 for yellow, a heating device 17, and an active energy ray irradiation device 18. In FIG. 1, 20 is a transport belt, 21 is a feeding roller facing the coating roller 10, and 22 is a winding roller. The base material 19 is conveyed in the direction of the arrow in FIG. 1 by winding the transport belt 20 with the take-up roller 22.
First, an intermediate layer is formed on the surface of the base material. Then, the ink receiving layer forming liquid (ink receiving layer) is applied by the coating roller 10.
Next, the base material on which the ink receiving layer is formed is scanned at a predetermined speed, and the clear ink is ejected from the clear ink head 11 to the non-image region on the ink receiving layer according to the inverted image pattern. Next, from a plurality of heads for ink (head 12 for black, head 13 for magenta, head 14 for cyan, and head 15 for yellow), black, magenta, cyan, and the image region on the ink receiving layer are formed. The yellow ink is ejected according to the image pattern.
Next, after heating with the heating device 17 to level each liquid, the active energy ray irradiation device 18 is used to irradiate the ink receiving layer, the ink, and the clear ink with the active energy rays under predetermined irradiation conditions. , Hardens.
The printed matter manufacturing apparatus is configured as a single-pass printing apparatus in which the width that can be printed by the inkjet head is larger than the width of the substrate to be printed and the number of scans is one, but the width of the head is larger than the width of the substrate. It may be configured as a multi-pass printing apparatus provided with a drive mechanism (head unit or base material transfer) capable of a plurality of scanning times.

(Printed matter)
The printed matter of the present invention is a printed matter produced by the method for producing a printed matter of the present invention, has the base material, the intermediate layer, and the ink receiving layer, and has an average thickness of the ink receiving layer after curing. , More than 15 μm, and further have other members as needed.
The base material, the intermediate layer, and the ink receiving layer in the printed matter of the present invention are the same as those described in the method for producing a printed matter and the apparatus for producing a printed matter of the present invention.

Examples of the present invention will be described below, but the present invention is not limited to these examples. Unless otherwise specified, samples were prepared and evaluated under the conditions of 25 ° C. and 60% humidity.

<Preparation of ink receiving layer forming liquid A>
An ink receiving layer forming solution A was prepared by stirring 95 parts by mass of 2-acryloyloxypropyl phthalic acid (manufactured by Shin-Nakamura Chemical Co., Ltd.) and 5 parts by mass of Omnirad TPO (manufactured by IGM Resins) as an initiator.
The static surface tension γ ₁ of the ink receiving layer forming liquid A at 25 ° C. was 39 mN / m, and the viscosity at 25 ° C. was 16,000 mPa · s.
The static surface tension at 25 ° C. was measured by the plate method with an automatic surface tension meter DY-300 manufactured by Kyowa Interface Science. The viscosity at 25 ° C. was measured with a rheometer MCR301 manufactured by Anton Pearl Co., Ltd. using a cone plate CP25-1 at a shear rate of 10 / s and 25 ° C. Hereinafter, the static surface tension and the viscosity were measured by the same method as the method for measuring the ink receiving layer forming liquid except that the temperature conditions were changed.

<Preparation of clear ink A0>
25 parts by mass of phenoxyethyl acrylate (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 26 parts by mass of acryloyl morpholine (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 42 parts by mass of trimethylolpropane ethoxytriacrylate (manufactured by Daicel Ornex Co., Ltd.), initiator Clear ink A0 was prepared by stirring 5 parts by mass of Omnirad TPO (manufactured by IGM Resins) and 2 parts by mass of Solspire 32000 (manufactured by Lubrizol) as a surfactant / dispersant.
The static surface tension γ ₂ of the clear ink A0 at 25 ° C. was 24 mN / m, and the viscosity at 40 ° C. was 8 mPa · s.

<Preparation of black ink A1>
25 parts by mass of phenoxyethyl acrylate (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 26 parts by mass of acryloylmorpholine (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 35 parts by mass of trimethylolpropane ethoxytriacrylate (manufactured by Daicel Ornex Co., Ltd.), initiator 5 parts by mass of Omnirad TPO (manufactured by IGM Resins), 2 parts by mass of Solspace 32000 (manufactured by Lubrizol) as a surfactant / dispersant, and 7 parts by mass of SPECIAL BLACK 350 (black pigment, manufactured by BASF Japan) as a coloring material. Black ink A1 was prepared by stirring.
The static surface tension γ ₂ of the black ink A1 at 25 ° C. was 24 mN / m, and the viscosity at 40 ° C. was 10 mPa · s.

<Preparation of magenta ink A2>
25 parts by mass of phenoxyethyl acrylate (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 26 parts by mass of acryloylmorpholine (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 35 parts by mass of trimethylpropanethoxytriacrylate (manufactured by Daicel Ornex Co., Ltd.), initiator Omnirad TPO (manufactured by IGM Resins) 5 parts by mass, Solspace 32000 (manufactured by Lubrizol) 2 parts by mass as a surfactant / dispersant, CINQUASIA MAGENTA RT-355-D (magenta pigment, manufactured by BASF Japan) as a coloring material. Magenta ink A2 was prepared by stirring 7 parts by mass.
The static surface tension γ ₂ of the magenta ink A2 at 25 ° C. was 24 mN / m, and the viscosity at 40 ° C. was 10 mPa · s.

<Preparation of cyan ink A3>
25 parts by mass of phenoxyethyl acrylate (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 26 parts by mass of acryloyl morpholine (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 35 parts by mass of trimethylolpropane ethoxytriacrylate (manufactured by Daicel Ornex Co., Ltd.), initiator 5 parts by mass of Omnirad TPO (manufactured by IGM Resins), 2 parts by mass of Solspire 32000 (manufactured by Lubrizol) as a surfactant / dispersant, and 40 parts by mass of IRGLITE BLUE GLVO (cyan pigment, manufactured by BASF Japan) as a coloring material. Cyan ink A3 was prepared by stirring.
The static surface tension γ ₂ of the cyan ink A3 at 25 ° C. was 24 mN / m, and the viscosity at 40 ° C. was 10 mPa · s.

<Preparation of yellow ink A4>
25 parts by mass of phenoxyethyl acrylate (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 26 parts by mass of acryloylmorpholin (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 35 parts by mass of trimethylolpropane ethoxytriacrylate (manufactured by Daicel Ornex Co., Ltd.), initiator Stir 5 parts by mass of Omnirad TPO (manufactured by IGM Resins), 2 parts by mass of Solsperse 32000 (manufactured by Lubrizol) as a surfactant / dispersant, and 40 parts by mass of NOVOPERM YELLOW H2G (yellow pigment, manufactured by Clariant) as a coloring material. The yellow ink A4 was prepared by the above.
The static surface tension γ ₂ of the yellow ink A4 at 25 ° C. was 24 mN / m, and the viscosity at 40 ° C. was 10 mPa · s.

Next, the prepared ink receiving layer forming liquid A, clear ink A0, black ink A1, magenta ink A2, cyan ink A3, and yellow ink A4 as color inks were used in the printed matter manufacturing apparatus 100 shown in FIG. Printed matter 1 was obtained as shown in the street.
As the discharge head unit 16, a GEN5 head manufactured by Ricoh Industry Co., Ltd. (MH5420, 150 npi x 4 rows, 2-color compatible model) is used, and one GEN5 head (compatible with a dot density of 600 dpi) is used as a clear ink head 11. , Black head 12 and magenta head 13 with one GEN5 head (black and magenta can handle dot densities of 300 dpi each), cyan head 14 and yellow head 15 with one GEN5 head (cyan and yellow 300 dpi each) A total of three (corresponding to dot density) were arranged in order with respect to the substrate transport direction. At this time, the position adjusting mechanism of the discharge head unit 16 was used to make adjustments so that the nozzle numbers of each GEN 5 would not deviate by 10 μm or more with respect to the substrate transport direction.
Further, the discharge head unit 16 was heated to 40 ° C., and the discharge drive waveform was adjusted so that printing could be performed at a droplet amount of 7 pL and a droplet speed of 7 m / s.
The clear ink was ejected at an ejection frequency of 600 dpi. Further, the color inks A1 to A4 were discharged at a discharge frequency of 300 dpi in each of the substrate transport directions. Printing was performed at a substrate transport speed such that the overlap time (landing time difference) between the clear ink and the yellow ink was 1 second.
As the active energy ray irradiating device 18, a linear irradiation type UV-LED light source GJ-75 manufactured by Hamamatsu Photonics was used, and the substrate was irradiated from a distance of 10 mm.
First, a 4-inch square glass plate (thickness 0.7 mm) is used as the base material 19, and Boncoat W-26 (manufactured by DIC Corporation) as a liquid for forming an intermediate layer is applied to the surface of the base material by a doctor blade applicator to 50 μm. After coating, it was dried in an oven at 100 ° C. for 30 minutes. Then, the above-mentioned ink receiving layer forming liquid A was applied by the coating roller 10 so that the average thickness after curing was 25 μm.
Next, this base material was scanned at a speed of 15 m / min, and the clear ink A0 was ejected from the clear ink head 11 into a non-image region with 7 pL droplets. The average thickness of the clear ink coating film after curing was 4 μm. Next, from the black head 12, the magenta head 13, the cyan head 14, and the yellow head 15, the above black (B), magenta (M), cyan (C), and yellow (Y) The color inks A1 to A4 of No. 1 were ejected in a droplet amount of 7 pL, respectively. The average thickness of the color ink coating film was 4 μm.
Next, the ink receiving layer, the color ink, and the clear ink were cured by the active energy ray irradiation device 18. The time from yellow ink ejection to curing was set to 10 seconds. From the above, printed matter 1 was obtained.

(Example 2)
A printed matter 2 was obtained in the same manner as in Example 1 except that the ink receiving layer forming liquid A was changed to the following ink receiving layer forming liquid B in Example 1.

<Preparation of ink receiving layer forming liquid B>
2-Acryloyloxypropylphthalic acid (manufactured by Shin-Nakamura Chemical Industry Co., Ltd.) 94.9 parts by mass, Omnirad TPO (manufactured by IGM Resins) 5 parts by mass as an initiator, BYK-UV-3510 (manufactured by BYK) as a surfactant The ink receiving layer forming liquid B was prepared by stirring 0.1 parts by mass.
The static surface tension γ ₁ of the ink receiving layer forming liquid B at 25 ° C. was 29 mN / m, and the viscosity at 25 ° C. was 16,000 mPa · s.

(Example 3)
In Example 1, the printed matter 3 was obtained in the same manner as in Example 1 except that the droplet ejection speeds of the clear ink A0 and the color inks A1 to A4 were changed to 9 m / s by adjusting the ejection drive waveform. ..

(Example 4)
In the first embodiment, the same as in the first embodiment except that the droplet volumes of the clear ink A0 and the color inks A1 to A4 are changed to 14 pL (the average film thickness of the coating film is 8 μm) by adjusting the ejection drive waveform. , Printed matter 4 was obtained.

(Example 5)
In Example 1, the printed matter 5 was obtained in the same manner as in Example 1 except that the average thickness of the ink receiving layer A coated on the substrate was changed to 50 μm.

(Example 6)
In the first embodiment, a GEN5 head (MH5220, 150 npi × 4 rows) for fine droplets manufactured by Ricoh Industry Co., Ltd. is used as the discharge head unit 16, and a clear ink head 11, a black head 12, and a magenta head 13 are used. , Cyan head 14, and yellow head 15, using a total of five GEN5 heads (each capable of handling a dot density of 600 dpi), at a discharge frequency such that each is 600 dpi in the substrate transport direction, and the droplet volume. 6 was obtained in the same manner as in Example 1 except that the average thickness of the coating film was changed to 2.5 pL (the average thickness of the coating film was 5.6 μm for the color ink and 1.4 μm for the clear ink).

(Example 7)
In Example 1, a printed matter 7 was obtained in the same manner as in Example 1 except that the active energy ray irradiation device 18 was changed to an electron beam irradiation device EC300 / 30/30 mA manufactured by Iwasaki Electric Co., Ltd. Note that in the electron beam irradiation apparatus EC300 / 30 / 30mA, an inert gas blanket, as the inert gas source, _{N 2} gas generating device with a compressor a (Maxi-Flow30, Inhouse Gas Co.) at a pressure of 0.2MPa The connection was made and N ₂ was allowed to flow at a flow rate of ₂ L / min to 10 L / min, and the oxygen concentration was set to be 500 ppm or less. The electron beam was irradiated under irradiation conditions of an acceleration voltage of 30 kV and a dose of 30 kGy, and cured.

(Example 8)
In Example 1, printing was performed by doubling the substrate transfer speed in this section so that the overlap time (landing time difference) of the discharges from the clear ink A0 to the yellow ink A4 was 0.5 seconds. A printed matter 8 was obtained in the same manner as in Example 1.

(Example 9)
In Example 1, the printed matter 9 was printed in the same manner as in Example 1 except that the substrate transfer speed in this section was doubled so that the time from the yellow ink A4 to curing was 5 seconds. Got

(Example 10)
A printed matter 10 was obtained in the same manner as in Example 1 except that printing was performed so that the time from clear ink A0 to curing was 5 seconds in Example 1.

(Example 11)
In Example 1, the printed matter 11 was obtained in the same manner as in Example 1 except that the order of the clear ink head and the color ink head was reversed and the color inks A1-A4 and the clear ink A0 were ejected in this order. ..

(Example 12)
In the first embodiment, the same as in the first embodiment except that the heating device 17 is provided between the ejection head unit 16 and the active energy ray irradiation device 18 to level the uncured ink receiving layer and each ink. , Printed matter 12 was obtained.
The heating device is manufactured by combining the Lutex blower G series manufactured by Hitachi Industrial Equipment Systems Co., Ltd., the electric heater XS-2 for generating high-temperature hot air manufactured by Kansai Electric Heat Co., Ltd., and the high blow nozzle 50AL manufactured by Kansai Electric Heat Co., Ltd. The heating device used was adjusted so that the wind speed from the tip of the nozzle was 2 m / sec.

(Example 13)
A printed matter 13 was obtained in the same manner as in Example 1 except that the following ink receiving layer forming liquid C was used instead of the ink receiving layer forming liquid A in Example 1.

<Preparation of ink receiving layer forming liquid C>
2-Acryloyloxyethyl succinate (manufactured by Shin-Nakamura Chemical Industry Co., Ltd.) 94.9 parts by mass, Omnirad TPO (manufactured by IGM Resins) 5 parts by mass as an initiator, BYK-UV-3510 (manufactured by BYK) as a surfactant The ink receiving layer forming liquid C was prepared by stirring 0.1 parts by mass.
The static surface tension of the ink receiving layer forming liquid C at 25 ° C. was 29 mN / m, and the viscosity at 25 ° C. was 160 mPa · s.

(Example 14)
A printed matter 14 was obtained in the same manner as in Example 1 except that the following ink receiving layer forming liquid D was used instead of the ink receiving layer forming liquid A in Example 1.

<Preparation of ink receiving layer forming liquid D>
2-Acryloyloxyethyl succinate (manufactured by Shin-Nakamura Chemical Co., Ltd.) 90.9 parts by mass, Initiator: Omnirad TPO (manufactured by IGM Resins) by 5 parts by mass, as surfactant BYK-UV-3510 (manufactured by BYK) The ink receiving layer forming liquid D was prepared by stirring 0.1 part by mass and 4 parts by mass of the white pigment.
The static surface tension of the ink receiving layer forming liquid D at 25 ° C. was 29 mN / m, and the viscosity at 25 ° C. was 300 mPa · s.

(Example 15)
In Example 1, the printed matter 15 was obtained in the same manner as in Example 1 except that the following ink receiving layer forming liquid E was used instead of the ink receiving layer forming liquid A.

<Preparation of ink receiving layer forming liquid E>
Urethane acrylic oligomer CN968 (manufactured by Sartomer) 47.5 parts by mass, 1,6-hexanediol diacrylate SR238F (manufactured by Sartomer) 47.5 parts by mass, and Omnirad TPO (manufactured by IGM Resins) 5 parts by mass as an initiator. The ink receiving layer forming liquid E was prepared by stirring.
The static surface tension γ ₁ of the ink receiving layer forming liquid E at 25 ° C. was 32 mN / m, and the viscosity at 25 ° C. was 100 mPa · s.

(Example 16)
In Example 1, the printed matter 16 was obtained in the same manner as in Example 1 except that the following ink receiving layer forming liquid F was used instead of the ink receiving layer forming liquid A.

<Preparation of ink receiving layer forming liquid F>
Stir 65.0 parts by mass of urethane acrylic oligomer CN929 (manufactured by Sartomer), 30.0 parts by mass of tripropylene glycol diacrylate SR306H (manufactured by Sartomer), and 5 parts by mass of Omnirad TPO (manufactured by IGM Resins) as an initiator. To prepare an ink receiving layer forming liquid F.
The static surface tension γ ₁ of the ink receiving layer forming liquid F at 25 ° C. was 32 mN / m, and the viscosity at 25 ° C. was 3,500 mPa · s.

(Example 17)
In Example 1, the printed matter 17 was obtained in the same manner as in Example 1 except that the following ink receiving layer forming liquid G was used instead of the ink receiving layer forming liquid A.

<Preparation of ink receiving layer forming liquid G>
The ink receiving layer forming liquid G was prepared by stirring 95.0 parts by mass of the urethane acrylic oligomer CN975 (manufactured by Sartomer) and 5 parts by mass of Omnirad TPO (manufactured by IGM Resins) as an initiator.
The static surface tension γ ₁ of the ink receiving layer forming liquid G at 25 ° C. was 34 mN / m, and the viscosity at 25 ° C. was 10,700 mPa · s.

(Example 18)
In Example 1, the printed matter 18 was obtained in the same manner as in Example 1 except that the following ink receiving layer forming liquid H was used instead of the ink receiving layer forming liquid A.

<Preparation of ink receiving layer forming liquid H>
Stir 85.0 parts by mass of urethane acrylic oligomer CN929 (manufactured by Sartomer), 10.0 parts by mass of tripropylene glycol diacrylate SR306H (manufactured by Sartomer), and 5 parts by mass of Omnirad TPO (manufactured by IGM Resins) as an initiator. To prepare an ink receiving layer forming liquid H.
The static surface tension γ ₁ of the ink receiving layer forming liquid H at 25 ° C. was 33 mN / m, and the viscosity at 25 ° C. was 20,000 mPa · s.

(Example 19)
In Example 1, a white acrylic resin plate (Acrylite, Mitsubishi Chemical Co., Ltd., 10 cm square, thickness 2 mm) was used as the base material instead of the 4-inch square glass plate (thickness 0.7 mm), and the intermediate layer was dried. A printed matter 19 was obtained in the same manner as in Example 1 except that the temperature was changed to 50 ° C. for 24 hours.

(Example 20)
In Example 1, an MDF plate (NP Wood, Sumitomo Forestry Co., Ltd., 10 cm square, thickness 2.5 mm) was used instead of the 4-inch square glass plate (thickness 0.7 mm) as the base material. , A printed matter 20 was obtained in the same manner as in Example 1.

(Example 21)
Example 1 except that a low-pressure melamine decorative plate (Aika Kogyo Co., Ltd., 10 cm square, thickness 0.95 mm) was used instead of the 4-inch square glass plate (thickness 0.7 mm) as the base material. In the same manner as above, a printed matter 21 was obtained.

(Example 22)
In Example 1, the printed matter 22 was prepared in the same manner as in Example 1 except that a veneer plate (10 cm square, thickness 5.5 mm) was used instead of the 4-inch square glass plate (thickness 0.7 mm) as the base material. Obtained.

(Example 23)
A printed matter 22 was obtained in the same manner as in Example 1 except that an aluminum plate (10 cm square, thickness 1 mm) was used instead of the 4-inch square glass plate (thickness 0.7 mm) as the base material in Example 1. It was.

(Example 24)
In the first embodiment, the discharge timings of the odd-numbered nozzle rows and the even-numbered nozzle rows of each color are shifted by 300 × 2√3 dpi, and the discharges are 300 × √3 / 2 dpi (about 260 dpi) in the substrate transport direction, respectively. A printed matter 24 was obtained in the same manner as in Example 1 except that the droplet volume was changed to 9.6 pL (the average thickness of the coating film was 4 μm with the color ink) at the frequency.

(Example 25)
A printed matter 25 was obtained in the same manner as in Example 1 except that the droplet ejection speed was changed to 4 m / s in Example 1.

(Example 26)
A printed matter 26 was obtained in the same manner as in Example 1 except that the droplet volume was changed to 4 pL in Example 1.

(Example 27)
A printed matter 27 was obtained in the same manner as in Example 1 except that the average thickness of the ink receiving layer was changed to 0.8 μm in Example 1.

(Example 28)
A printed matter 28 was obtained in the same manner as in Example 1 except that the dot density was changed to 150 dpi × 150 dpi in Example 1.

(Example 29)
In Example 1, the following ink receiving layer forming liquid I was changed to an average thickness of 5 μm instead of the ink receiving layer forming liquid A, and the following inks J0 to J4 were changed instead of the inks A0 to A4. Printed matter 29 was obtained in the same manner as in 1.

<Preparation of ink receiving layer forming liquid I>
2-Acryloyloxypropylphthalic acid (manufactured by Shin-Nakamura Chemical Industry Co., Ltd.) 94 parts by mass, Omnirad TPO (manufactured by IGM Resins) 5 parts by mass as an initiator, BYK-UV-3510 (manufactured by BYK) 1 mass as a surfactant The ink receiving layer forming liquid I was prepared by stirring the parts.
The static surface tension γ ₁ of the ink receiving layer forming liquid I at 25 ° C. was 25 mN / m, and the viscosity at 25 ° C. was 16,000 mPa · s.

<Preparation of clear ink J0>
25 parts by mass of phenoxyethyl acrylate (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 26 parts by mass of acryloylmorpholine (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 43.9 parts by mass of trimethylolpropane ethoxytriacrylate (manufactured by Daicel Ornex Co., Ltd.), Clear ink J0 was prepared by stirring 5 parts by mass of Omnirad TPO (manufactured by IGM Resins) as an initiator and 0.1 parts by mass of Solsperse 32000 (manufactured by Lubrizol) as a surfactant / dispersant.
The static surface tension γ ₂ of the liquid at 25 ° C. was 30 mN / m, and the viscosity at 40 ° C. was 8 mPa · s.

<Preparation of black ink J1>
25 parts by mass of phenoxyethyl acrylate (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 26 parts by mass of acryloylmorpholin (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 36.9 parts by mass of trimethylolpropane ethoxytriacrylate (manufactured by Daicel Ornex Co., Ltd.), Omnirad TPO (manufactured by IGM Resins) 5 parts by mass as an initiator, Solspace 32000 (manufactured by Lubrizol) 0.1 parts by mass as a surfactant / dispersant, SPECIAL BLACK 350 (black pigment, manufactured by BASF Japan) as a coloring material. Black ink J1 was prepared by stirring 7 parts by mass.
The static surface tension γ ₂ of the black ink J1 at 25 ° C. was 30 mN / m, and the viscosity at 40 ° C. was 10 mPa · s.

<Preparation of magenta ink J2>
25 parts by mass of phenoxyethyl acrylate (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 26 parts by mass of acryloylmorpholine (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 36.9 parts by mass of trimethylpropaneethoxytriacrylate (manufactured by Daicel Ornex Co., Ltd.), Omnirad TPO (manufactured by IGM Resins) 5 parts by mass as an initiator, Solspace 32000 (manufactured by Lubrizol) 0.1 parts by mass as a surfactant / dispersant, CINQUASIA MAGENTA RT-355-D (magenta pigment, BASF) as a coloring material Magenta ink J2 was prepared by stirring 7 parts by mass (manufactured by Japan).
The static surface tension γ ₂ of the magenta ink J2 at 25 ° C. was 30 mN / m, and the viscosity at 40 ° C. was 10 mPa · s.

<Preparation of cyan ink J3>
25 parts by mass of phenoxyethyl acrylate (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 26 parts by mass of acryloyl morpholine (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 36.9 parts by mass of trimethylpropaneethoxytriacrylate (manufactured by Daicel Ornex Co., Ltd.), Omnirad TPO (manufactured by IGM Resins) 5 parts by mass as an initiator, Solsperse 32000 (manufactured by Lubrizol) 0.1 parts by mass as a surfactant / dispersant, IRGLITE BLUE GLVO (cyan pigment, manufactured by BASF Japan) as a coloring material. Cyan ink J3 was prepared by stirring 40 parts by mass.
The static surface tension γ ₂ of the cyan ink J3 at 25 ° C. was 30 mN / m, and the viscosity at 40 ° C. was 10 mPa · s.

<Preparation of yellow ink J4>
25 parts by mass of phenoxyethyl acrylate (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 26 parts by mass of acryloylmorpholin (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 36.9 parts by mass of trimethylolpropane ethoxytriacrylate (manufactured by Daicel Ornex Co., Ltd.), Omnirad TPO (manufactured by IGM Resins) 5 parts by mass as an initiator, Solspace 32000 (manufactured by Lubrizol) 0.1 parts by mass as a surfactant / dispersant, NOVOPERM YELLOW H2G (yellow pigment, manufactured by Clariant) 40 as a coloring material Yellow ink J4 was prepared by stirring parts by mass.
The static surface tension γ ₂ of the yellow ink J4 at 25 ° C. was 30 mN / m, and the viscosity at 40 ° C. was 10 mPa · s.

(Example 30)
In Example 29, a printed matter 30 was obtained in the same manner as in Example 29, except that the following ink receiving layer forming liquid K was used instead of the ink receiving layer forming liquid I.

<Preparation of ink receiving layer forming liquid K>
2-Acryloyloxyethyl succinate (manufactured by Shin-Nakamura Chemical Industry Co., Ltd.) 94 parts by mass, Omnirad TPO (manufactured by IGM Resins) 5 parts by mass as an initiator, BYK-UV-3510 (manufactured by BYK) 1 mass as a surfactant The ink receiving layer forming liquid K was prepared by stirring the parts.
The static surface tension γ ₁ of the ink receiving layer forming liquid K at 25 ° C. was 25 mN / m, and the viscosity at 25 ° C. was 160 mPa · s.

(Example 31)
In Example 29, a printed matter 31 was obtained in the same manner as in Example 29, except that the following ink receiving layer forming liquid L was used instead of the ink receiving layer forming liquid I.

<Preparation of ink receiving layer forming liquid L>
Urethane acrylic oligomer CN929 (manufactured by Sartomer) 64 parts by mass, tripropylene glycol diacrylate SR306H (manufactured by Sartomer) 30 parts by mass, Omnirad TPO (manufactured by IGM Resins) 5 parts by mass as an initiator, BYK-UV as a surfactant An ink receiving layer forming liquid L was prepared by stirring 1 part by mass of −3510 (manufactured by BYK).
The static surface tension γ ₁ of the ink receiving layer forming liquid L at 25 ° C. was 24 mN / m, and the viscosity at 25 ° C. was 3,500 mPa · s.

(Example 32)
In Example 29, a printed matter 32 was obtained in the same manner as in Example 29, except that the following ink receiving layer forming liquid M was used instead of the ink receiving layer forming liquid I.

<Preparation of ink receiving layer forming liquid M>
2-Acryloyloxyethyl succinate (manufactured by Shin-Nakamura Chemical Co., Ltd.) 47 parts by mass, isobornyl acrylate SR506 (manufactured by Sartomer) 47 parts by mass, Omnirad TPO (manufactured by IGM Resins) 5 parts by mass as an initiator, surface activity An ink receiving layer forming liquid M was prepared by stirring 1 part by mass of BYK-UV-3510 (manufactured by BYK) as an agent.
The static surface tension γ ₁ of the ink receiving layer forming liquid M at 25 ° C. was 24 mN / m, and the viscosity at 25 ° C. was 41 mPa · s.

(Comparative Example 1)
In Example 1, a printed matter 33 was obtained in the same manner as in Example 1 except that the color inks A1-A4 were directly ejected onto the base material without forming the ink receiving layer A.

(Comparative Example 2)
A printed matter 34 was obtained in the same manner as in Example 1 except that the intermediate layer was not formed in Example 1.

(Comparative Example 3)
A printed matter 35 was obtained in the same manner as in Example 1 except that the following ink receiving layer forming liquid N was used instead of the ink receiving layer forming liquid A in Example 1.

<Preparation of ink receiving layer forming liquid N>
An ink receiving layer forming solution N was prepared by stirring 95 parts by mass of tripropylene glycol diacrylate SR306H (manufactured by Sartomer) and 5 parts by mass of Omnirad TPO (manufactured by IGM Resins) as an initiator.
The static surface tension γ ₁ of the ink receiving layer forming liquid N at 25 ° C. was 36 mN / m, and the viscosity at 25 ° C. was 12 mPa · s.

(Comparative Example 4)
In Example 1, the printed matter 36 was obtained in the same manner as in Example 1 except that the following ink receiving layer forming liquid O was used instead of the ink receiving layer forming liquid A.

<Preparation of ink receiving layer forming liquid O>
An ink receiving layer forming liquid O was prepared by stirring 95 parts by mass of urethane acrylic oligomer CN929 (manufactured by Sartomer) and 5 parts by mass of Omnirad TPO (manufactured by IGM Resins) as an initiator.
The static surface tension of the ink receiving layer forming liquid O at 25 ° C. was 32 mN / m, and the viscosity at 25 ° C. was 75,000 mPa · s.

In addition, "surface roughness" and "wetting property" were measured as the surface properties of the base material. "Surface roughness" is the arithmetic mean roughness Ra (μm) measured with a laser microscope VK-X100 manufactured by KEYENCE CORPORATION, and "wetting property" is water with a contact angle meter DMs-401 manufactured by Kyowa Interface Science Co., Ltd. The contact angle (°) with the base material is shown.

Next, with respect to the obtained printed matter 33 to 36 of Examples 1 to 2 and Comparative Examples 1 to 4, "image quality (color development density, color development density unevenness)" and "robustness (fixability)" were obtained as follows. , Water resistance / alcohol resistance) ”was evaluated. The evaluation results are shown in Table 12.

<Image quality (color density, color density unevenness)>
Five 10 mm square solid images were created with four-color process black (black obtained by superimposing the four colors of CMYK), and five solid image samples were measured at five locations using eXact (manufactured by X-rite). The color density of the average value was determined according to the following criteria. If the evaluation is "Δ" or higher, there is no problem in actual use.

[Evaluation Criteria-Color Density-]
⊚: Average color density is more than 1.5 〇: Average color density is more than 1.3 and 1.5 or less Δ: Average color density is more than 1.1 and 1.3 or less ×: Average color density Value is 1.1 or less

<Image quality (uneven color density)>
Each of the five solid image samples prepared by measuring the color development density was measured at five locations, and the maximum and minimum values of the color development density of the solid image were extracted and judged according to the following criteria. If the evaluation is "Δ" or higher, there is no problem in actual use.

[Criteria-Color density unevenness-]
⊚: Difference between maximum and minimum color density is less than 0.02 〇: Difference between maximum and minimum color density is 0.02 or more and less than 0.04 Δ: Difference between maximum and minimum color density Is 0.04 or more and less than 0.06 ×: The difference between the maximum value and the minimum value of the color development density is 0.06 or more

<Robustness (fixability)>
The obtained printed matter 1-36 was rubbed with a non-woven fabric 100 times and then scratched with a nail to evaluate the fixability of the solid image on the substrate based on the following evaluation criteria.

[Evaluation criteria]
〇: No scratches on the printed surface due to rubbing, no peeling from the base material △: Slight scratches on the printed surface due to rubbing, no peeling from the base material ×: Printed surface due to rubbing Scratches on the surface or peeling from the substrate can be confirmed

<Robustness (water resistance / alcohol resistance)>
Water and ethanol (purity 99.5%) were sprayed on the obtained printed matter 1-36 and left for 12 hours, and the water resistance and alcohol resistance were evaluated according to the following evaluation criteria.

[Evaluation criteria]
〇: No decrease in color development concentration due to contact liquid, no peeling from the base material can be confirmed Δ: Slight decrease in color development concentration due to contact liquid cannot be confirmed, no peeling from the base material can be confirmed ×: Due to contact liquid Decreased color density is seen, or peeling from the substrate can be confirmed.

From the results in Table 12, the printed matter 1-32 of Examples 1-32 was formed because the dripped ink was excellent in wetting and spreading, and the image quality was good, as compared with the printed matter 33-36 of Comparative Examples 1-4. It was also found to be excellent in image robustness. In addition, no difference in image quality was observed depending on the base material, and it was found that the printing method was independent of the base material.

Aspects of the present invention are, for example, as follows.
<1> An intermediate layer forming step of forming an intermediate layer on a base material, and
An ink receiving layer forming step of applying an ink receiving layer forming liquid to the intermediate layer to form an ink receiving layer,
An image forming step of applying ink to the ink receiving layer by an inkjet method to form an image is included.
This is a method for producing a printed matter, characterized in that the viscosity of the ink receiving layer forming liquid at 25 ° C. is 40 mPa · s or more.
<2> The viscosity of the ink receiving layer forming liquid at 25 ° C. is 40 mPa · s or more and 20,000 mPa · s or less.
The method for producing a printed matter according to <1>, wherein the static surface tension of the ink is 20 mN / m or more and 100 mN / m or less.
<3> The method for producing a printed matter according to any one of <1> to <2>, wherein the ink is applied to at least one of the surface and the inside of the ink receiving layer.
<4> The method for producing a printed matter according to any one of <1> to <3>, wherein the ejection speed of ejecting the ink is 5 m / s or more.
<5> The method for producing a printed matter according to any one of <1> to <4>, wherein the volume of the ejected ink per droplet is 1 pL or more.
<6> The method for producing a printed matter according to any one of <1> to <5>, wherein the average thickness of the ink receiving layer is 1 μm or more.
<7> The method for producing a printed matter according to any one of <1> to <6>, wherein the dot density for ejecting the ink is 240 dpi × 240 dpi or more.
<8> The method for producing a printed matter according to any one of <1> to <7>, further comprising a curing step, wherein the curing step is performed by at least one of ultraviolet rays and an electron beam.
<9> The ink is a plurality of inks.
The method for producing a printed matter according to any one of <1> to <8>, wherein the overlap of the ejection times of the plurality of inks is 1 second or less.
<10> The method for producing a printed matter according to any one of <1> to <9>, wherein the ink is ejected to the ink receiving layer and then irradiated with active energy rays within 10 seconds.
<11> The method for producing a printed matter according to any one of <1> to <10>, wherein the clear ink containing no coloring material is discharged to a region other than the region where the image is formed.
<12> The method for producing a printed matter according to any one of <1> to <11>, wherein the ink contains a coloring material.
<13> Described in any one of <11> to <12>, wherein the order of applying or ejecting the ink receiving layer forming liquid, the ink, and the clear ink is the following (A) or (B). This is a method for manufacturing printed matter.
(A) Ink receiving layer forming liquid, ink, clear ink in order (B) Ink receiving layer forming liquid, clear ink, inking order <14> The time difference between the ink and the clear ink is within 1 second. The method for producing a printed matter according to any one of <1> to <13>.
<15> The method for producing a printed matter according to any one of <11> to <14>, wherein the ink and the clear ink are ejected and then irradiated with active energy rays within 10 seconds.
<16> The method for producing a printed matter according to any one of <10> to <15>, wherein the ink receiving layer and the ink are heated before irradiating the active energy rays.
<17> The method for producing a printed matter according to any one of <11> to <16>, wherein the average thickness of the clear ink layer formed by the clear ink is 1 μm or more and 10 μm or less.
<18> The method for producing a printed matter according to any one of <1> to <17>, wherein the ink receiving layer forming liquid contains a pigment.
<19> A printed matter produced by the method for producing a printed matter according to any one of <1> to <18>.
It has the base material, the intermediate layer, and the ink receiving layer.
The printed matter is characterized in that the average thickness of the ink receiving layer after curing is more than 1 μm.
<20> An intermediate layer forming means for forming an intermediate layer on a base material, and
An ink receiving layer forming means for forming an ink receiving layer by applying an ink receiving layer forming liquid to the intermediate layer,
It has an image forming means for forming an image by applying ink to the ink receiving layer by an inkjet method.
It is a printed matter manufacturing apparatus characterized in that the viscosity of the ink receiving layer forming liquid at 25 ° C. is 40 mPa · s or more.

According to the method for producing printed matter according to <1> to <18>, the printed matter according to <19>, and the printed matter manufacturing apparatus according to <20>, the conventional problems are solved and the present invention is used. The object of the invention can be achieved.

10 Coating roller 11 Clear ink head 12 Black head 13 Magenta head 14 Cyan head 15 Yellow head 16 Discharge head unit 17 Heating device 18 Active energy ray irradiation device 19 Base material 20 Conveyance belt 21 Sending roller 22 Winding roller 100 Printed matter manufacturing equipment

Japanese Unexamined Patent Publication No. 2011-230501 JP-A-2017-13506

Claims (20)

An intermediate layer forming step of forming an intermediate layer on a base material,
An ink receiving layer forming step of applying an ink receiving layer forming liquid to the intermediate layer to form an ink receiving layer,
An image forming step of applying ink to the ink receiving layer by an inkjet method to form an image is included.
A method for producing a printed matter, characterized in that the viscosity of the ink receiving layer forming liquid at 25 ° C. is 40 mPa · s or more. The viscosity of the ink receiving layer forming liquid at 25 ° C. is 40 mPa · s or more and 20,000 mPa · s or less.
The method for producing a printed matter according to claim 1, wherein the static surface tension γ _{2 of the} ink is 20 mN / m or more and 100 mN / m or less. The method for producing a printed matter according to any one of claims 1 to 2, wherein the ink is applied to at least one of the surface and the inside of the ink receiving layer. The method for producing a printed matter according to any one of claims 1 to 3, wherein the ejection speed for ejecting the ink is 5 m / s or more. The method for producing a printed matter according to any one of claims 1 to 4, wherein the volume of the ejected ink per droplet is 1 pL. The method for producing a printed matter according to any one of claims 1 to 5, wherein the average thickness of the ink receiving layer is 1 μm or more. The method for producing a printed matter according to any one of claims 1 to 6, wherein the dot density for ejecting the ink is 240 dpi × 240 dpi or more. The method for producing a printed matter according to any one of claims 1 to 7, further comprising a curing step, wherein the curing step is performed by at least one of ultraviolet rays and an electron beam. The ink is a plurality of inks,
The method for producing a printed matter according to any one of claims 1 to 8, wherein the overlap of the ejection times of the plurality of inks is 1 second or less. The method for producing a printed matter according to any one of claims 1 to 9, wherein the ink receiving layer is irradiated with active energy rays within 10 seconds after the ink is ejected. The method for producing a printed matter according to any one of claims 1 to 10, wherein a clear ink containing no coloring material is discharged to a region other than the region where the image is formed. The method for producing a printed matter according to any one of claims 1 to 11, wherein the ink contains a coloring material. The method for producing a printed matter according to any one of claims 11 to 12, wherein the order of applying or ejecting the ink receiving layer forming liquid, the ink, and the clear ink is (A) or (B) below.
(A) Ink receiving layer forming liquid, ink, clear ink in order (B) Ink receiving layer forming liquid, clear ink, ink in order The method for producing a printed matter according to any one of claims 11 to 13, wherein the time difference between the ink and the clear ink is within 1 second. The method for producing a printed matter according to any one of claims 11 to 14, wherein the active energy rays are irradiated within 10 seconds after the ink and the clear ink are discharged. The method for producing a printed matter according to any one of claims 10 to 15, wherein the ink receiving layer and the ink are heated before being irradiated with the active energy rays. The method for producing a printed matter according to any one of claims 11 to 16, wherein the average thickness of the clear ink layer formed by the clear ink is 1 μm or more and 10 μm or less. The method for producing a printed matter according to any one of claims 1 to 17, wherein the ink receiving layer forming liquid contains a pigment. A printed matter produced by the method for producing a printed matter according to any one of claims 1 to 18.
It has the base material, the intermediate layer, and the ink receiving layer.
A printed matter characterized in that the average thickness of the ink receiving layer after curing is more than 1 μm. An intermediate layer forming means for forming an intermediate layer on a base material,
An ink receiving layer forming means for forming an ink receiving layer by applying an ink receiving layer forming liquid to the intermediate layer,
It has an image forming means for forming an image by applying ink to the ink receiving layer by an inkjet method.
An apparatus for producing a printed matter, wherein the ink receiving layer forming liquid has a viscosity at 25 ° C. of 40 mPa · s or more.