JP6843291B1 - Printed matter and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printed matter having a new design property. SOLUTION: A printing layer formed by using a base material and an ultraviolet curable process ink, a liquid repellent layer formed by using an ultraviolet curable ink containing a liquid repellent and a colored organic pigment, and an ultraviolet curable overcoat. A printed matter in which layers and layers are formed in this order. [Selection diagram] None

Description

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

When printing on a package that stores food such as confectionery, a front printing method is often adopted in which printing is usually performed only on the front side of the film base material and not on the back side in contact with food. ..

In such front printing, offset printing suitable for high-speed printing and mass printing is often used. In offset printing (lithographic printing), since the coating film thickness is about 2 μm or less at the maximum, it is difficult to give a special effect by thickening as in screen printing. Therefore, for example, when forming unevenness for imparting a three-dimensional effect, for example, a silicone-based or fluorine-based liquid-repellent overprint varnish and a glossy coating varnish are used on the print layer. By layering varnishes of different types, embossed irregularities are created on the printed surface while using offset printing, giving a three-dimensional appearance or a matte feeling (see Patent Documents 1 and 2). ..

Japanese Unexamined Patent Publication No. 6-8392 Japanese Unexamined Patent Publication No. 2006-281681

By the way, new design is required every day for printed matter. Therefore, an object of the present invention is to provide a printed matter having a new design property.

The present invention comprises a substrate, a printed layer formed using an ultraviolet curable process ink, a liquid repellent layer formed using an ultraviolet curable ink containing a liquid repellent and a colored organic pigment, and an ultraviolet curable overcoat. It is a printed matter in which a coat layer and a coat layer are formed in this order.

According to the printed matter of the present invention, since the portion having the matte feeling of the embossed concave portion is colored, it is possible to impart an unprecedented design property.

It is sectional drawing which shows the structure of the printed matter of one Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. In addition, the dimensional ratios in the drawings are exaggerated for convenience of explanation and may differ from the actual ratios.

FIG. 1 is a schematic cross-sectional view showing the structure of a printed matter of one embodiment. The printed matter 10 of FIG. 1 has a print layer 12 printed on a base material 11, a liquid repellent layer 13 on the print layer 12, and an ultraviolet curable overcoat layer 14 on the liquid repellent layer 13. The printing layer 12 constitutes a pattern or the like, and here constitutes a part of the base material, but may be full-scale printing. The liquid-repellent layer 13 is laminated on a part of the printing layer 12. Since the liquid-repellent layer contains a colored organic pigment, the portion formed by the liquid-repellent layer also becomes a pattern or the like and is visible from the outside. Therefore, the liquid-repellent layer forms a pattern or the like (a portion visually recognized by coloring) together with the printing layer. Further, the ultraviolet curable overcoat layer 14 is repelled by the liquid repellent layer 13, and the portion of the ultraviolet curable overcoat layer 14 on the liquid repellent layer 13 becomes embossed (matte). The ultraviolet curable overcoat layer 14 may be arranged on the entire surface or may be partially arranged.

Hereinafter, each component of the printed matter will be described.

In addition, in this specification, "X to Y" indicating a range means "X or more and Y or less". Unless otherwise specified, the operation, physical properties, etc. are measured under the conditions of room temperature (20 to 25 ° C.) / relative humidity of 45 to 55%. As used herein, "(meth) acrylate" refers to "acrylate or methacrylate" and "(meth) acrylic acid" refers to "acrylic acid or methacrylic acid".

<Base material>
The base material is a target for forming a printing layer, and the material constituting the base material is not particularly limited, but Japanese paper, filter paper, drawing paper, high-quality paper, cardboard, cardboard, recycled paper, and synthetic paper. , White paperboard, yellow paperboard, chip ball, colored paperboard, building material base paper, mount, thin leaf paper, heat-sensitive paper, synthetic fiber paper and other paper base materials; plastic base materials; and composite materials thereof, etc. may be used.

<Print layer>
The print layer is formed using UV curable process inks.

The ultraviolet curable process ink is usually composed of four colors of black ink, cyan ink, magenta ink, and yellow ink, and these are appropriately combined at the time of printing to form a printing layer.

Each ink of black ink, cyan ink, magenta ink, and yellow ink contains a pigment exhibiting each color.

Pigments exhibiting black include carbon blacks such as channel black, furnace black, acetylene black, thermal black, or lamp black, titanium black, and aniline black.

Examples of pigments exhibiting cyan include C.I. I. Pigment Blue 1, C.I. I. Pigment Blue 2, C.I. I. Pigment Blue 3, C.I. I. Pigment Blue 15, C.I. I. Pigment Blue 15: 3, C.I. I. Pigment Blue 15: 4, C.I. I. Pigment Blue 16, C.I. I. Pigment Blue 22, C.I. I. Pigment Blue 60, C.I. I. Pigment Blue 63, C.I. I. Examples include organic pigments such as Pigment Blue 66.

Examples of the magenta pigment include C.I. I. Pigment Red 2, C.I. I. Pigment Red 3, C.I. I. Pigment Red 5, C.I. I. Pigment Red 7, C.I. I. Pigment Red 12, C.I. I. Pigment Red 48 (Ca), C.I. I. Pigment Red 48 (Mn), C.I. I. Pigment Red 57 (Ca), C.I. I. Pigment Red 57: 1, C.I. I. Pigment Red 112, C.I. I. Pigment Red 122, C.I. I. Pigment Red 123, C.I. I. Pigment Red 146, C.I. I. Pigment Red 168, C.I. I. Pigment Red 176, C.I. I. Pigment Red 184, C.I. I. Pigment Red 185, C.I. I. Pigment Red 202, C.I. I. Pigment Red 209, C.I. I. Pigment Red 242, C.I. I. Examples include organic pigments such as Pigment Red 269.

Examples of the yellow pigment include C.I. I. Pigment Yellow 1, C.I. I. Pigment Yellow 2, C.I. I. Pigment Yellow 12, C.I. I. Pigment Yellow 13, C.I. I. Pigment Yellow 14, C.I. I. Pigment Yellow 16, C.I. I. Pigment Yellow 17, C.I. I. Pigment Yellow 73, C.I. I. Pigment Yellow 74, C.I. I. Pigment Yellow 75, C.I. I. Pigment Yellow 83, C.I. I. Pigment Yellow 93, C.I. I. Pigment Yellow 95, C.I. I. Pigment Yellow 97, C.I. I. Pigment Yellow 98, C.I. I. Pigment Yellow 109, C.I. I. Pigment Yellow 110, C.I. I. Pigment Yellow 114, C.I. I. Pigment Yellow 120, C.I. I. Pigment Yellow 128, C.I. I. Pigment Yellow 129, C.I. I. Pigment Yellow 138, C.I. I. Pigment Yellow 150, C.I. I. Pigment Yellow 151, C.I. I. Pigment Yellow 154, C.I. I. Pigment Yellow 155, C.I. I. Pigment Yellow 174, C.I. I. Pigment Yellow 180, C.I. I. Examples include organic pigments such as Pigment Yellow 185.

In the UV curable process ink, the pigment is usually blended in an amount of 10 to 30% by mass.

The UV curable process ink contains a UV curable resin in addition to a pigment for coloring each ink.

Examples of the ultraviolet curable resin include an ultraviolet curable urethane acrylate resin, an ultraviolet curable polyester acrylate resin, an ultraviolet curable epoxy acrylate resin, an ultraviolet curable polyol acrylate resin, an ultraviolet curable diallyl phthalate resin, and an ultraviolet curable epoxy resin. Be done. The ultraviolet curable resin may be used alone or in combination of two or more.

The printing layer is obtained by printing an ultraviolet curable process ink and then irradiating it with ultraviolet rays to cure the curable resin.

In the UV curable process ink, the UV curable resin is usually blended in an amount of 10 to 30% by mass.

The UV curable process ink also contains various additives such as a polymerizable compound, a photopolymerization initiator, a binder resin, a UV absorber, a UV stabilizer, a surfactant, a polymerization inhibitor, and a dispersant.

The polymerizable compound refers to a compound having a polymerizable group that is radically or cationically polymerized by ultraviolet rays, and may be a monomer, an oligomer, or a mixture containing these. Examples of this polymerizable group include groups having an ethylenically unsaturated double bond. Specifically, for example, an acryloyl group, a methacryloyl group, a vinyl group, a vinyl ether group, an epoxy group, an oxetane group, and a maleic anhydride group. Examples thereof include an acid group and an N-substituted maleimide group. The polymerizable compound may be used alone or in combination of two or more.

As the polymerizable compound, from the viewpoint of curability, a polyfunctional (meth) acrylate; a monofunctional (meth) acrylate; and a reactive oligomer (here, the oligomer is a polymer in which a monomer unit is repeated about 2 to several tens). It is preferable to use at least one selected from the group consisting of (referring to).

Examples of the photopolymerization initiator include acetophenones such as p-butyltrichloroacetophenone, 2,2'-diethoxyacetophenone, and 2-hydroxy-2-methyl-1-phenylpropan-1-one; 2-methylthioxanthone, Ketones such as 2-ethylthioxanthone, 2-isopropylthioxanthone, benzyldimethylketal, hydroxycyclohexylphenylketone; benzoins such as benzoin, benzoinmethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, Michler benzoylbenzoate, α-amyloxime Photopolymerization initiators such as esters and tetramethylthium monosulfide can be mentioned. The photopolymerizable initiator may be used alone or in combination of two or more.

Examples of the binder resin include polyvinyl chloride, poly (meth) acrylic acid ester, epoxy resin, polyester resin, polyurethane resin, cellulose derivative (for example, ethyl cellulose, cellulose acetate, nitrocellulose), vinyl chloride-vinyl acetate copolymer, and polyamide. Examples thereof include resins, polyvinyl acetal resins, diallyl phthalate resins, alkyd resins, rosin-modified alkyd resins, petroleum resins, urea resins, and synthetic rubbers such as butadiene-acrylic nitrile copolymers.

The print layer and the liquid repellent layer are preferably printed with halftone dots. By printing both the print layer and the liquid-repellent layer with halftone dots, it is possible to give a texture of unevenness in addition to excellent reproducibility of gradation (gradation) and fine images. Printing at halftone dots can be performed by, for example, offset printing.

The thickness of the print layer is usually about 1 to 10 μm.

<Liquid repellent layer>
The liquid repellent layer is formed using an ultraviolet curable ink. Specifically, it is obtained by printing an ultraviolet curable ink and then irradiating it with ultraviolet rays to cure the ultraviolet curable resin. The UV curable ink for forming the liquid repellent layer contains a UV curable resin, a liquid repellent and a colored organic pigment.

Examples of the ultraviolet curable resin include those similar to those described in the above-mentioned printing layer.

Examples of the liquid repellent include silicone-based liquid repellents and fluorine-based liquid repellents. Above all, since the liquid repellent effect is high, the liquid repellent is preferably a silicone-based liquid repellent. Silicone-based liquid repellents include reactive silicones such as epoxy-modified, carboxyl-modified, carbinol-modified, alcohol-modified, phenol-modified, (meth) acrylic-modified, and mercapto-modified; polyether-modified, methylstyryl-modified, alkyl-modified, alkylaralkyl. Non-reactive silicones such as modified, fatty acid modified, alkoxy modified, and fluorine modified; straight silicones such as dimethyl silicone, methylphenyl silicone, diphenylsilicone, and methylhydrogen silicone can be mentioned. One or more of these can be appropriately selected.

Since it is possible to change the design of the unevenness formed by the liquid repellent layer, it is preferable to use two or more kinds of liquid repellents in combination, and it is more preferable to use two or more kinds of silicone-based liquid repellents in combination. At this time, a form in which the amounts of the two or more different silicone-based liquid repellents are different is a preferable form because the design of the unevenness formed by the liquid repellent layer can be changed.

The (total) content of the liquid repellent is preferably 2% by mass or more, and more preferably 5% by mass or more, because it is easy to emboss the liquid repellent layer. Further, the content of the liquid repellent is preferably 15% by mass or less, and more preferably 10% by mass or less, because the printability is lowered in the liquid repellent layer.

The liquid repellent layer contains a colored organic pigment. That is, the colored organic pigment contained in the liquid-repellent layer is responsible for coloring the pattern or the like formed by the liquid-repellent layer. The liquid-repellent layer simultaneously has a liquid-repellent property for forming embossing in one layer and a coloring property for imparting designability. With such a configuration, the matte portion forming the embossing has coloring, and a new design property can be imparted.

At this time, it is preferable that the colored organic pigment contained in the liquid-repellent layer is one type. Here, "containing one kind of colored organic pigment" means that two or more kinds of colored organic pigments are not contained. In this case, the colored organic pigment contained in the liquid-repellent layer exhibits color by itself. By using a colored organic pigment that develops a color independently, it is possible to color with a color different from the color produced by the process ink, and it is possible to impart a new design property.

As the colored organic pigment used for the liquid-repellent layer, each organic pigment constituting the process ink or a colored organic pigment having a color such as green, pink, or orange, which is called a special color, can be used. Examples of the pigment for green color include C.I. I. Pigment Green 36, C.I. I. Examples thereof include polyhalogenated metal phthalocyanines such as Pigment Green 7.

The ultraviolet curable ink for forming the liquid-repellent layer also contains various additives such as a polymerizable compound, a photopolymerization initiator, a binder resin, and a wax. Examples of the polymerizable compound, the photopolymerization initiator, and the binder resin include those similar to those described in the above-mentioned printing layer.

The liquid repellent layer is preferably printed with halftone dots. At this time, the halftone dot ratio (halftone dot area ratio) of the liquid repellent layer is preferably 50% or more (upper limit 100%). When the halftone dot ratio is in such a range, the printing layer of the lower layer is less likely to be transparent, and the printing by the liquid-repellent layer is clearly visible.

Printing at halftone dots can be performed by, for example, offset printing.

The thickness of the liquid repellent layer is usually about 1 to 5 μm.

<UV curable overcoat layer>
The ultraviolet curable overcoat layer (hereinafter, also simply referred to as an overcoat layer) is formed by using an ultraviolet curable coating liquid. The UV curable coating liquid contains a UV curable resin.

The overcoat layer is provided on the entire surface or a part. In the portion where the liquid-repellent layer and the overcoat layer overlap, the ultraviolet curable coating liquid is repelled by the liquid-repellent layer, and the liquid-repellent layer portion becomes matte. On the other hand, the portion where the liquid-repellent layer and the overcoat layer do not overlap becomes glossy due to the overcoat layer.

Examples of the ultraviolet curable resin include those similar to those described in the above-mentioned printing layer.

The ultraviolet curable coating liquid also contains various additives such as a polymerizable compound, a photopolymerization initiator, and a wax. Examples of the polymerizable compound and the photopolymerization initiator include those similar to those described in the above-mentioned printing layer. Examples of the wax include paraffin wax, carnauba wax, polyethylene wax, polypropylene wax, beeswax, microcrystalline wax and the like. One type of wax may be used alone, or two or more types may be used in combination.

The overcoat layer preferably does not contain silicone from the viewpoint of suppressing a decrease in glossiness. Here, examples of the silicone include dimethylpolysiloxane and dimethylpolysiloxane derivative.

Further, the overcoat layer is transparent so that the pattern of the lower printing layer and the liquid-repellent layer can be visually recognized by the consumer or the like. Therefore, it is preferable that the overcoat layer does not contain a coloring pigment.

The thickness of the overcoat layer is usually about 1 to 10 μm.

<Manufacturing method>
In the present invention, a printed layer is formed on a substrate by offset printing using an ultraviolet curable process ink, and then a liquid repellent layer is formed by offset printing using an ultraviolet curable ink containing a liquid repellent and a colored organic pigment. Also provided is a method for producing a printed matter, which comprises forming an ultraviolet curable overcoat layer using an ultraviolet curable coating liquid. At this time, it is a preferable form that the liquid-repellent layer contains only one type of colored organic pigment.

Offset printing for forming the print layer and offset printing for forming the liquid-repellent layer may be performed in separate steps, but from the viewpoint of process simplification and productivity, for forming the print layer. It is preferable that the step and the step for forming the liquid-repellent layer are performed by the same offset printing machine. Further, the ultraviolet curable overcoat layer may be formed by the same offset printing machine.

The ultraviolet curable overcoat layer is not limited to offset printing, but is printed by gravure printing, offset printing, flexo printing, inkjet printing, silk screen printing, heat-sensitive transfer method, etc .; by coating with gravure roll coater, curtain flow coater, etc. Can be formed.

UV curable process ink for forming a print layer, UV curable ink for forming a liquid repellent layer, and UV irradiation for curing a UV curable coating liquid for forming a UV curable overcoat layer. May be performed at any stage. Specifically, printing UV curable process ink, UV irradiation, printing UV curable ink, UV irradiation, forming UV curable coating liquid, UV irradiation; printing UV curable process ink, UV curable ink Printing, UV irradiation, forming UV curable overcoat liquid, UV irradiation; printing UV curable process ink, printing UV curable ink, forming UV curable overcoat liquid, UV irradiation, etc. .. As the ultraviolet irradiation device, for example, an ultraviolet lamp such as a high-pressure UV lamp (high-pressure mercury lamp), a metal halide lamp, or an LED-UV can be used.

The effects of the present invention will be described with reference to the following examples. In the examples, the indication of "parts" or "%" may be used, but unless otherwise specified, it indicates "parts by mass" or "% by mass". Unless otherwise specified, each operation is performed at room temperature (25 ° C.).

As a substrate, by an offset printing machine on a cardboard (coated board 310 g / ^{m 2),} ultraviolet curable process inks of four colors (T & K TOKA Co., Ltd., UV TIO PROCESS YELLOW PS3 L, UV TIO PROCESS MAGENT PS3 L, UV TIO Printing was performed using PROCESS CYAN PS3 L, UV TIO PROCESS BLACK PS3 L).

Then, using the same offset printing machine, 3% by mass of silicone-based liquid repellent 1 (acrylic modified silicone), 5% by mass of silicone-based liquid repellent 2 (dimethyl silicone), C.I. I. Pigment Red 242 20% by mass, UV curable resin (diallyl phthalate resin) 10% by mass, polymerizable compound 50% by mass, photopolymerization initiator 10% by mass, and wax 2% by mass were printed.

A print layer and a liquid-repellent layer were formed by irradiating with ultraviolet rays using an ultraviolet irradiation device.

Next, an ultraviolet curable varnish (UV coat varnish ESAC-4 manufactured by T & K TOKA Co., Ltd.) was applied and irradiated with ultraviolet rays using an ultraviolet irradiation device to form an ultraviolet curable overcoat layer having a thickness of 5 μm.

In this way, by providing the liquid-repellent layer formed by using the ultraviolet curable ink containing the liquid-repellent agent and the (one kind) colored organic pigment, it is possible to impart a new design property to the printed matter having an embossed tone. it can.

10 printed matter,
11 base material,
12 print layers,
13 Liquid repellent layer,
14 UV curable overcoat layer.

Claims (9)

A base material, a printing layer formed using an ultraviolet curable process ink, a liquid repellent layer formed using an ultraviolet curable ink containing a silicone-based liquid repellent and a colored organic pigment, and an ultraviolet curable overcoat layer. And are formed in this order,
Two or more of the silicone-based liquid repellents are used in combination.
Printed matter except when the UV curable overcoat layer forms a lens. The printed matter according to claim 1, wherein the colored organic pigment contained in the liquid-repellent layer is one type. The printed matter according to claim 1 or 2, wherein the liquid-repellent layer is printed with halftone dots. The printed matter according to any one of claims 1 to 3, wherein the printed layer and the liquid-repellent layer are printed with halftone dots. The printed matter according to any one of claims 1 to 4 , wherein the ultraviolet curable overcoat layer does not contain silicone. The printed matter according to any one of claims 1 to 5 , wherein the ultraviolet curable overcoat layer does not contain a coloring pigment. The printed matter according to any one of claims 1 to 6 , wherein the silicone-based liquid repellent is selected from the group consisting of reactive silicone, non-reactive silicone and straight silicone. A print layer is formed on the substrate by offset printing using an ultraviolet curable process ink.
Next, a liquid repellent layer was formed by offset printing using an ultraviolet curable ink containing a silicone-based liquid repellent and a colored organic pigment.
Furthermore, it has the ability to form an ultraviolet curable overcoat layer using an ultraviolet curable coating solution.
The silicone-based liquid repellent is two or more kinds of silicone-based compounds.
However, a method for producing a printed matter, except when the ultraviolet curable overcoat layer forms a lens. The method for producing a printed matter according to claim 8 , wherein the colored organic pigment contained in the liquid-repellent layer is one type.