JP2016142840A - Plastic label and method for manufacturing plastic label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel plastic label excellent in metal glossiness.SOLUTION: The plastic label has a transparent print layer 4 and a metal pigment-containing print layer 5, the transparent print layer and the metal pigment-containing print layer being provided so as to be adjacent to each other, and satisfies at least one of the following conditions. The transparent print layer is formed of water base ink and the metal pigment-containing print layer is formed of oil base ink. The transparent print layer is formed of the oil base ink, and the metal pigment-containing print layer is formed of the water base ink. A label base material 2, the transparent print layer, and the metal pigment-containing print layer are formed in this order, the transparent print layer being formed by curing a curable composition layer, the metal pigment-containing print layer beng formed of the oil base ink or the water base ink. The label base material, the metal pigment-containing print layer, and the transparent print layer are formed in this order, the metal pigment-containing print layer being formed by curing a curable composition layer, the transparent print layer being formed of the oil base ink or the water base ink.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a plastic label and a manufacturing method thereof. More specifically, the present invention relates to a plastic label excellent in metallic luster and a method for producing the same.

  Currently, plastic bottles such as PET bottles and metal bottles such as bottle cans are widely used as containers for beverages such as tea and soft drinks. In many cases, plastic labels are attached to these containers for display, decoration, and functionality. Examples of the plastic label include a shrink label in which a printing layer is provided on a shrink film (heat-shrinkable film) and stretchability from the merits of decoration, workability (followability to containers), a wide display area, and the like. Widely used are stretch labels having a stretch film as a base material, and wound labels used by winding a label base material provided with a printed layer around an adherend such as a container.

  Among the plastic labels, for example, there is a plastic label having a metallic luster by providing a printed layer containing a metal pigment. A printing ink containing an aluminum pigment obtained by a wet ball mill method is known as an ink for forming a printing layer containing such a metal pigment. Furthermore, in recent years, aluminum flake pigments obtained by a so-called vapor deposition method ("deposited aluminum pigments"), in which flakes are produced by pulverizing a deposited metal film as a printing ink for forming a printing layer having a particularly high-brightness metallic luster. High-intensity printing inks are known (for example, see Patent Documents 1 to 3).

  Further, in Cited Document 4, a transparent colored ink layer and a silver ink layer are provided in this order on one surface of a transparent film, and the transparent colored ink layer and the silver ink layer are interposed between the transparent colored ink layer and the silver ink layer. A metallic film in which a transparent printing layer is formed is disclosed. Moreover, since the transparent resin layer is formed between the colored ink layer and the silver ink layer, it is disclosed that the film has a deep and beautiful metallic feeling (see Patent Document 4).

JP 2007-224243 A JP 2003-96334 A JP 2002-20668 A JP 2000-177061 A

  An object of the present invention is to provide a novel plastic label that has a printed layer formed using a printing ink containing a metal pigment and is excellent in metallic gloss.

The present invention is a plastic label having a transparent printing layer and a metal pigment-containing printing layer on at least one surface of a label substrate, wherein the transparent printing layer and the metal pigment-containing printing layer are provided adjacent to each other. And a plastic label characterized by satisfying at least one of the following (1) to (4).
(1) The transparent printing layer is a printing layer formed with water-based ink, and the metal pigment-containing printing layer is a printing layer formed with oil-based ink. (2) The transparent printing layer is formed with oil-based ink. (3) The label base material, the transparent printing layer, and the metal pigment-containing printing layer are formed in this order, and the transparent layer is a transparent printing layer. The printing layer is a printing layer formed by curing a curable composition layer, and the metal pigment-containing printing layer is a printing layer formed with oil-based ink or water-based ink. (4) The label base material and the metal A pigment-containing printing layer and the transparent printing layer are formed in this order, the metal pigment-containing printing layer is a printing layer formed by curing a curable composition layer, and the transparent printing layer is an oil-based ink or water-based Is a printed layer formed by Nki

  The present invention is also a method for producing a plastic label having a transparent printing layer and a metal pigment-containing printing layer on at least one surface of a label substrate, wherein the transparent printing layer is formed on one surface of the label substrate. Alternatively, a step of forming one of the metal pigment-containing print layers with one of water-based ink or oil-based ink, and a transparent print layer or metal pigment-containing print adjacent to the one print layer And a step of forming the other printed layer of the layers with the other ink of water-based ink or oil-based ink.

  Further, the present invention is a method for producing a plastic label having a transparent printing layer and a metal pigment-containing printing layer on at least one surface of a label substrate, wherein the curable composition is formed on one surface of the label substrate. A step of curing the material layer to form one of the transparent printing layer or the metal pigment-containing printing layer, and the other of the transparent printing layer or the metal pigment-containing printing layer adjacent to the one printing layer. And a step of forming the printed layer with a water-based ink or an oil-based ink.

  The plastic label obtained by the plastic label of the present invention and the method for producing the plastic label of the present invention has excellent metallic luster due to having the above-described configuration. For this reason, it is excellent in the brightness of a plastic label, and decorating property.

It is the schematic (partial sectional drawing) which shows an example of the plastic label of this invention. It is the schematic which shows an example of the cylindrical plastic label which is one Embodiment of the plastic label of this invention. FIG. 3 is a schematic diagram showing an example of a cylindrical plastic label that is an embodiment of the plastic label of the present invention (enlarged view of the essential part of the A-A ′ cross section in FIG. 2).

  The plastic label of the present invention is a plastic label having a transparent printing layer and a metal pigment-containing printing layer on at least one surface of a label substrate. The plastic label of the present invention may contain layers (other layers) other than the label base material, the transparent printing layer, and the metal pigment-containing printing layer within a range not impairing the effects of the present invention.

In the present invention, the plastic label has a transparent printing layer and a metal pigment-containing printing layer adjacent to each other. The plastic label of the present invention has high metallic luster by satisfying at least one of the following (1) to (4). In addition, the plastic label of this invention may satisfy | fill any one of following (1)-(4), and satisfy | fills 2 or more in the range which does not impair the effect of this invention. There may be.
(1) The transparent printing layer is a printing layer formed with water-based ink, and the metal pigment-containing printing layer is a printing layer formed with oil-based ink. (2) The transparent printing layer is formed with oil-based ink. (3) The label base material, the transparent printing layer, and the metal pigment-containing printing layer are formed in this order, and the transparent layer is a transparent printing layer. The printing layer is a printing layer formed by curing a curable composition layer, and the metal pigment-containing printing layer is a printing layer formed with oil-based ink or water-based ink. (4) The label base material and the metal A pigment-containing printing layer and the transparent printing layer are formed in this order, the metal pigment-containing printing layer is a printing layer formed by curing a curable composition layer, and the transparent printing layer is an oil-based ink or water-based Is a printed layer formed by Nki

[Transparent printing layer]
The transparent printing layer is an essential layer in the plastic label of the present invention. Here, the transparent printing layer refers to a printing layer having such a transparency that an adjacent metal pigment-containing printing layer can be visually recognized through the printing layer. The transparent printing layer may be transparent and may be colored or colorless.

  The transparent printing layer is provided on at least one surface of the label base material. The transparent printing layer may be provided on the entire surface of at least one surface of the label base material, or may be provided partially. The transparent printing layer may be a single layer or a multilayer of two or more layers, but a single layer is preferable from the viewpoint of cost.

  Although the said transparent printing layer is not specifically limited, It is preferable that binder resin is included as an essential component. Although the said binder resin is not specifically limited, The role as a main resin component which forms the said transparent printing layer is borne.

  The content of the binder resin in the transparent printing layer is not particularly limited, but is preferably 50% by weight or more, more preferably 70% by weight or more, based on the total weight (100% by weight) of the transparent printing layer. More preferably, it is 80 weight% or more, Most preferably, it is 90 weight% or more. When the content is 50% by weight or more, the adhesiveness to the label substrate or the metal pigment-containing print layer is good, which is preferable. The upper limit of the content is not particularly limited, and may be 100% by weight. In addition, in order to control content of each component (for example, binder resin etc.) in the said transparent printing layer, content of each component in the non-volatile component of the printing ink which forms a transparent printing layer is transparent printing. What is necessary is just to prepare printing ink so that it may become desired content in a layer. In general, the content (% by weight) of each component in all the non-volatile components of the printing ink is equal to the content (% by weight) of each component in the transparent printing layer.

  Although the thickness of the said transparent printing layer is not specifically limited, 0.1-5 micrometers is preferable, More preferably, it is 0.2-1.5 micrometers. When the thickness is 0.1 μm or more, the effect of improving the metallic luster due to having the transparent printing layer formed so as to reduce the thickness unevenness is preferable. It is preferable that the thickness is 5 μm or less because a transparent printing layer can be formed without requiring a relatively long time for drying and solidification or curing.

(When the plastic label of the present invention satisfies the above (1))
When the plastic label of this invention satisfy | fills said (1), the said transparent printing layer is a printing layer formed with water-based ink. More specifically, in the transparent printing layer, the water-based ink is applied to at least one surface of the label base material, and a part or all of the volatile components in the water-based ink is removed by drying (dry solidification). To be formed. Moreover, you may make it harden | cure after apply | coating and drying (dry solidification) as needed.

  The aqueous ink preferably contains at least an aqueous resin, water, and alcohol. The water-based resin refers to a resin used for a known or common water-based ink, and is not limited to a resin having water solubility. Examples of the aqueous resin include water-soluble resins (water-soluble resins) and resin emulsions. The water-based resin becomes the binder resin in the transparent printing layer formed with the water-based ink.

  Examples of the aqueous resin include an acrylic aqueous resin, a urethane aqueous resin, and an epoxy aqueous resin.

  The water-soluble resin is not particularly limited as long as it is a resin that can be dissolved in water. As said water-soluble resin, resin which has a hydrophilic group is mentioned, for example. Examples of the hydrophilic group include an anionic hydrophilic group such as a carboxyl group, a phosphate ester group, and a sulfonic acid group; and a cationic hydrophilic group such as an amino group, an imino group, a quaternary ammonium base, and a tertiary sulfonium base. A nonionic hydrophilic group such as a hydroxyl group, an ether group or an amide group. Examples of the resin before the introduction of the hydrophilic group include resins exemplified and explained as binder resins contained in the oil-based ink described later.

  Examples of the water-soluble resin include water-soluble acrylic resins, water-soluble urethane resins, water-soluble epoxy resins, and the like. Examples of such water-soluble resins include urethane resins having the hydrophilic group, epoxy resins having the hydrophilic group, and acrylic resins having the hydrophilic group.

  As the resin emulsion, various thermoplastic resin emulsions can be used. For example, vinyl acetate resin emulsion, acrylic resin emulsion, vinyl chloride resin emulsion, polyolefin resin emulsion (for example, polyethylene resin emulsion), Examples include urethane resin emulsions, epoxy resin emulsions, and polyester emulsions.

  The resin emulsion is not particularly limited, but is a forced emulsification type using a surfactant as an emulsifier, or a self-emulsification type in which a hydrophilic group (for example, a hydrophilic group in the water-soluble resin described above) is introduced into the resin. May be.

  Examples of the acrylic water-based resin include the above-mentioned acrylic resins having a hydrophilic group and acrylic resin emulsions. The acrylic resin before the introduction of the hydrophilic group in the acrylic resin having the hydrophilic group includes, for example, acrylic resins exemplified and explained as binder resins contained in the oil-based ink described later. Can be mentioned.

  Examples of the urethane-based aqueous resin include, for example, an urethane-based aqueous resin in which a hydrophilic group is introduced into a molecule such as an ionomer type, a bisulfite type, or a nonionic type (self-emulsifying type aqueous urethane resin); polymer Urethane water-based resin (forced emulsification-type water-based urethane resin) obtained by forcibly emulsifying polymerized urethane-based resins (or prepolymers) such as emulsification type, block isocyanate type, and prepolymer emulsification type in the presence of an emulsifier Is mentioned. Examples of the polymerized urethane resin include urethane resins exemplified and described as binder resins contained in oil-based inks described later.

  Examples of the epoxy-based aqueous resin include an epoxy-based aqueous resin (external emulsification-type aqueous epoxy-based resin) dispersed in water that may contain an organic solvent with an emulsifier. An epoxy-based aqueous resin obtained by modifying an epoxy-based resin (self-emulsifying water-based epoxy resin) can be used.

  As the aqueous resin, among them, acrylic resin emulsion, urethane resin emulsion, polyester resin emulsion, polyolefin resin emulsion, water-soluble acrylic resin, and water-soluble urethane resin are preferable.

  The water-based ink may have curability (for example, active energy ray curability, thermosetting, two-component reaction curability, moisture curability (moisture curability), and the like). That is, the transparent printing layer may be a printing layer formed by curing a curable composition layer formed with a curable aqueous ink. In particular, when the transparent printing layer is provided on the label substrate prior to the metal pigment-containing printing layer, the water-based ink is used from the viewpoint of reducing the solubility of the printing ink that forms the adjacent metal pigment-containing printing layer. A water-based ink having curability is preferable. Examples of the curable water-based ink include curable water-based inks described when the following (3) is satisfied.

  The water-based ink may contain components (additives) other than the water-based resin, water, and alcohol as long as the effects of the present invention are not impaired. The above additives are not particularly limited, but curing agents, emulsifiers, organic solvents, surfactants, waxes, silicone compounds, colorants (color pigments, fluorescent pigments, dyes, etc.), plasticizers, lubricants, anti-settling agents. , Dispersants, stabilizers, antifoaming agents, fillers, antioxidants, ultraviolet absorbers, antistatic agents, anti-coloring agents, fragrances, deodorants and the like. Only 1 type may be used for the said additive and 2 or more types may be used for it.

  The content of the water-based resin in the water-based ink is not particularly limited, but is preferably 50% by weight or more, more preferably 60% by weight or more with respect to the total weight (100% by weight) of the nonvolatile components of the water-based ink. More preferably, it is 70% by weight or more. When the content is 50% by weight or more, the adhesiveness to the label substrate or the metal pigment-containing print layer is good, which is preferable. The upper limit of the content is not particularly limited, and may be 100% by weight. When the water-based ink contains a colorant, the water-based ink is not particularly limited, but the water-based ink contains 5 to 50% by weight of the colorant and water-based resin with respect to the total weight (100% by weight) of the nonvolatile components in the water-based ink. It is more preferable to contain 50 to 95% by weight. On the other hand, when the water-based ink does not contain a colorant, the content of the water-based resin is not particularly limited, but is 80% by weight or more with respect to the total weight (100% by weight) of the nonvolatile components in the water-based ink. More preferably, it is 90% by weight or more.

  Although content of the non-volatile component (for example, aqueous resin etc.) in the said water-based ink is not specifically limited, 30 to 70 weight% is preferable with respect to the total weight (100 weight%) of water-based ink.

  Although content of the volatile component (for example, water, alcohol, etc.) in the said water-based ink is not specifically limited, 30 to 70 weight% is preferable with respect to the total weight (100 weight%) of water-based ink.

  The water-based ink is produced, for example, by mixing the water-based resin, water, and alcohol or other additives as necessary. Mixing can be carried out by a known or conventional mixing method, and is not particularly limited. For example, a mixer such as a paint shaker, butterfly mixer, planetary mixer, pony mixer, dissolver, tank mixer, homomixer, homodisper, A mill such as a roll mill, a sand mill, a ball mill, a bead mill, or a line mill, or a mixing device such as a kneader is used. The mixing time (retention time) during mixing is not particularly limited, but is preferably 10 to 120 minutes. The obtained water-based ink may be used after being filtered, if necessary. Each of the above components (aqueous resin, alcohol, and other additives) may be used alone or in combination of two or more.

  The viscosity (23 ± 2 ° C.) of the water-based ink is not particularly limited, but is preferably 10 to 1000 mPa · s, more preferably 20 to 500 mPa · s, for example, when applied by gravure printing. The viscosity of the water-based ink can be controlled by the type and blending amount (content) of a water-based resin, water, alcohol, and other components, a thickener, a thickener, and the like. In this specification, “viscosity” is JIS Z unless otherwise specified, using an E-type viscometer (conical plate-type rotational viscometer) under the conditions of 23 ± 2 ° C. and cylinder rotation speed of 50 rotations. The value measured according to 8803 is meant.

(When the plastic label of the present invention satisfies the above (2))
When the plastic label of this invention satisfy | fills said (2), the said transparent printing layer is a printing layer formed with oil-based ink. More specifically, in the transparent printing layer, the oil-based ink is applied to at least one surface of the label base material, and a part or all of the volatile components in the oil-based ink is removed by drying (dry solidification). To be formed. Moreover, you may make it harden | cure after apply | coating and drying (dry solidification) as needed. The oil-based ink is preferably an ink containing a binder resin and an organic solvent as essential components.

  The binder resin is not particularly limited, and a known or commonly used printing layer or a binder resin for oil-based ink can be used. Although the said binder resin is not specifically limited, It plays the role as the main resin component which forms the said transparent printing layer, and forms a coating film when the said oil-based ink is coated. The binder resin is not particularly limited, and examples thereof include acrylic resins, urethane resins, polyester resins, polyamide resins, cellulose resins, and vinyl chloride-vinyl acetate copolymer resins. Among these, acrylic resin, urethane resin, cellulose resin, and vinyl chloride-vinyl acetate copolymer resin are used from the viewpoint of rigidity, transparency, and adhesion to the label base material and the adjacent metal pigment-containing print layer. An acrylic resin and a urethane resin are more preferable. Only 1 type may be used for the said binder resin and 2 or more types may be used for it.

  Examples of the acrylic resin include a polymer composed of an acrylic monomer as an essential monomer component, that is, a polymer (copolymer) having at least a structural unit derived from an acrylic monomer. The monomer component constituting the acrylic resin may contain a monomer component other than the acrylic monomer.

Examples of the acrylic monomer include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, and isobutyl (meth) acrylate. , S-butyl (meth) acrylate, t-butyl (meth) acrylate, hexyl (meth) acrylate, octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isononyl (meth) acrylate, ( (Meth) acrylic acid alkyl ester having a linear or branched alkyl group such as decyl (meth) acrylate and dodecyl (meth) acrylate [preferably (meth) acrylic acid C _1-12 alkyl ester and the like]; (Meth) acrylic acid; carboxyl group-containing (meth) acrylic such as carboxyethyl acrylate Esters; 2-hydroxymethyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, diethylene glycol mono ( Hydroxyl group-containing (meth) acrylic acid esters such as (meth) acrylate and dipropylene glycol mono (meth) acrylate [preferably (meth) acrylic acid hydroxy C _1-8 alkyl ester and the like]; (meth) acrylic acid cyclohexyl, (meta ) (Meth) acrylic acid cycloalkyl esters such as isobornyl acrylate; N-methylol (meth) acrylamide, N-butoxymethyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide (Meth) acrylic acid amide derivatives such as N, N-diethyl (meth) acrylamide; dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, dipropylaminoethyl (meth) acrylate, dimethylaminopropyl (meth) acrylate And monomers having a (meth) acryloyl group (monomers having at least an acryloyl group or a methacryloyl group) such as (meth) acrylic acid dialkylaminoalkyl esters such as dipropylaminopropyl (meth) acrylate. As for the said acrylic monomer, only 1 type may be used and 2 or more types may be used.

  The monomer component constituting the acrylic resin other than the acrylic monomer is not particularly limited. For example, a carboxyl group-containing polymerizable unsaturated compound such as crotonic acid, itaconic acid, fumaric acid, maleic acid, or the anhydride thereof; Styrenic compounds such as styrene, vinyl toluene and α-methylstyrene; vinyl esters such as vinyl acetate and vinyl propionate; vinyl halides such as vinyl chloride; vinyl ethers such as methyl vinyl ether; cyano groups such as (meth) acrylonitrile Contains vinyl compounds; ethylene, propylene, and the like.

  The content of the acrylic monomer in the total amount (100% by weight) of the monomer component constituting the acrylic resin, that is, the content of the structural unit derived from the acrylic monomer in the acrylic resin (100% by weight) is particularly Although not limited, 80 weight% or more (for example, 80-100 weight%) is preferable from a viewpoint of adhesiveness with a label base material or an adjacent metal pigment containing printing layer, More preferably, it is 90 weight% or more (for example, 90 ~ 100 wt%).

  The weight average molecular weight (Mw) of the acrylic resin is not particularly limited, but is 20,000 to 250,000 from the viewpoint of the abrasion resistance of the transparent printing layer and the adhesion to the label substrate and the adjacent metal pigment-containing printing layer. Is more preferable, and 30,000 to 200,000 is more preferable. In addition, in this specification, although a weight average molecular weight (Mw) is not specifically limited, For example, it can measure by GPC using polystyrene as a standard substance.

  The glass transition temperature (Tg) of the acrylic resin is not particularly limited, but is preferably 30 to 120 ° C, more preferably 40 to 100 ° C, from the viewpoint of improving the wear resistance and heat resistance of the transparent printing layer.

  A commercial item may be used for the acrylic resin. As commercially available products, for example, “ARUFON series” manufactured by Toagosei Co., Ltd., “Dianar series (BR series, LR series, etc.)” manufactured by Mitsubishi Rayon Co., Ltd., etc. are available on the market.

  The urethane-based resin is not particularly limited, and a known or commonly used printing layer or a polyurethane resin for printing ink can be used. Examples thereof include a resin obtained by reacting a polyisocyanate compound and a polyol compound.

  Examples of the polyisocyanate compound include one or a mixture of two or more known diisocyanates of aromatic, aliphatic and alicyclic groups. Examples of the diisocyanates include tolylene diisocyanate, 4,4-diphenylmethane diisocyanate, 1,3-phenylene diisocyanate, hexamethylene diisocyanate, xylylene diisocyanate, 1,5-naphthalene diisocyanate, and isophorone diisocyanate. If necessary, tri- or higher functional polyisocyanates and polyisocyanate adducts can be mixed with the diisocyanates.

  Examples of the polyol compound include ethylene glycol, diethylene glycol, 1,3-propanediol, propylene glycol (1,2-propanediol), butanediol (1,3-butanediol, 1,4-butanediol, etc.), 1, Low molecular weight glycols such as 6-hexanediol and cyclohexanedimethanol; polyether diols such as polyethylene glycol, polypropylene glycol, polytetramethylene glycol, polytetramethylene glycol-polycaprolactone copolymer; propylene glycol, butanediol, hexanediol Polyesters obtained from dibasic acids such as adipic acid, sebacic acid, azelaic acid, isophthalic acid, terephthalic acid and fumaric acid; Kutonjioru, polyvalerolactone diol, a known diols such as lactone diol, lactone block copolymer diols can be used. Moreover, said diols and trifunctional or more than polyol compounds (polyether polyol, polyester polyol, etc.) can also be mixed and used as needed.

  Among the above, polyester diol-based polyurethane (polyurethane obtained by using polyester diol as a polyol compound) is preferable.

  Although the glass transition temperature (Tg) of the said urethane type resin is not specifically limited, From a softness | flexibility viewpoint, -60-40 degreeC is preferable, More preferably, it is -50-30 degreeC.

  The weight average molecular weight (Mw) of the urethane resin is not particularly limited, but is preferably 10,000 to 100,000, more preferably 20,000 to 80,000, and still more preferably 30,000 to 70,000 from the viewpoint of scratch resistance. It is.

  A commercial item can also be used for the said urethane-type resin. For example, “Samprene IB series, LQ series” manufactured by Sanyo Chemical Industries, Ltd. is available on the market.

  The cellulose-based resin is not particularly limited. For example, nitrocellulose (nitrified cotton); cellulose acetate butyrate (cellulose acetate butyrate: CAB), cellulose acetate (cellulose acetate), cellulose acetate propionate (cellulose acetate propionate). : CAP) and the like, and a cellulose resin esterified with a carboxylic acid. Examples of the carboxylic acid include acetic acid, butyric acid, propionic acid, acetic anhydride, and butyric anhydride. The cellulose resin is preferably a cellulose resin esterified with a carboxylic acid, more preferably cellulose acetate butyrate (CAB) or cellulose acetate propionate (CAP). Only 1 type may be used for the said cellulose resin, and 2 or more types may be used for it.

  Although the weight average molecular weight (Mw) of the said cellulose resin is not specifically limited, 10,000-150,000 are preferable, More preferably, it is 12,000-100,000.

  A commercial item can also be used for the said cellulose resin. For example, “CAP-482-20”, “CAB-381-20”, “CAB-381-0.5”, “CAB-381-0.1”, “CAB-551-0. 1), “CAB-551-0.01”, “CAP-504-0.2”, “CAP-482-0.5”, KOREA CNC “RS Series”, “SS Series” etc. Is available at

  The vinyl chloride-vinyl acetate copolymer resin includes a polymer composed of vinyl chloride and vinyl acetate as essential monomer components, that is, at least a structural unit derived from vinyl chloride and a structural unit derived from vinyl acetate. Examples include polymers (copolymers). The monomer component constituting the vinyl chloride-vinyl acetate copolymer resin may contain a monomer component other than vinyl chloride and vinyl acetate.

  The monomer component constituting the vinyl chloride-vinyl acetate copolymer resin other than vinyl chloride and vinyl acetate is not particularly limited, and examples thereof include: α-olefins such as ethylene and propylene; dicarboxylic acids; vinyl alcohol; crotonic acid, Carboxyl group-containing polymerizable unsaturated compounds such as itaconic acid, fumaric acid and maleic acid or anhydrides thereof; vinyl esters other than vinyl acetate; vinyl halides other than vinyl chloride; acrylic monomers constituting the above acrylic resins Examples include and are described acrylic monomers.

  Examples of the vinyl chloride-vinyl acetate copolymer resin include vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl acetate-ethylene copolymer, vinyl chloride-vinyl acetate- (meth) acrylic acid alkyl ester copolymer. And vinyl chloride-vinyl acetate-ethylene- (meth) acrylic acid copolymers, vinyl chloride-vinyl acetate-acrylic acid dihydroxyalkyl ester copolymers, vinyl chloride-vinyl acetate-acrylic acid hydroxyalkyl ester copolymers, etc. Can be mentioned.

  The weight average molecular weight (Mw) of the vinyl chloride-vinyl acetate copolymer resin is not particularly limited, but is preferably 5,000 to 70,000, more preferably 10,000 to 50,000 from the viewpoint of wear resistance. .

  The glass transition temperature (Tg) of the vinyl chloride-vinyl acetate copolymer resin is not particularly limited, but is preferably 50 to 90 ° C, more preferably 60 to 80 ° C, from the viewpoint of wear resistance.

  Commercially available products may be used as the vinyl chloride-vinyl acetate copolymer resin. For example, “Solvine Series” manufactured by Nissin Chemical Industry Co., Ltd. and “Kane Vinyl Series” manufactured by Kaneka Co., Ltd. are available on the market.

  As said organic solvent (organic solvent), the organic solvent etc. which are normally used for the oil-based ink used for gravure printing, flexographic printing, etc. can be used. Examples of the organic solvent include esters such as acetates (ethyl acetate, propyl acetate, butyl acetate, etc.); alcohols such as methanol, ethanol, isopropyl alcohol, propanol, and butanol; ketones such as methyl ethyl ketone and methyl isobutyl ketone; toluene, Aromatic hydrocarbons such as xylene; aliphatic hydrocarbons such as hexane and octane; alicyclic hydrocarbons such as cyclohexane and methylcyclohexane; glycols such as ethylene glycol and propylene glycol; ethylene glycol monopropyl ether, propylene glycol monomethyl ether, Glycol ethers such as propylene glycol monobutyl ether; glycol ether esters such as propylene glycol monomethyl ether acetate It is below. The organic solvent can be removed by drying after applying the oil-based ink. The solvent (solvent) includes the meaning of “dispersion medium”.

  The oil-based ink may have curability (for example, active energy ray curability, heat curability, two-component reaction curability, moisture curability, and the like). That is, the transparent printing layer may be a printing layer obtained by curing a curable composition layer formed by applying a curable oil-based ink. In particular, when the transparent printing layer is provided on the label substrate prior to the metal pigment-containing printing layer, the oil-based ink is used from the viewpoint of reducing the solubility of the printing ink that forms the adjacent metal pigment-containing printing layer. A curable oil-based ink is preferred. Examples of the curable oil-based ink include curable oil-based inks described in the case where (3) described below is satisfied.

  The oil-based ink may contain components (additives) other than the binder resin and the organic solvent as long as the effects of the present invention are not impaired. The additive is not particularly limited, but a curing agent, an emulsifier, a surfactant, a wax, a silicone compound, a color pigment, a fluorescent pigment, a dye, a plasticizer, a lubricant, an anti-settling agent, a dispersant, a stabilizer, a dissipator. Examples include foaming agents, fillers, antioxidants, ultraviolet absorbers, antistatic agents, anti-coloring agents, fragrances, and deodorants. Only 1 type may be used for the said additive and 2 or more types may be used for it.

  Although content of the said binder resin in the said oil-based ink is not specifically limited, 50 weight% or more is preferable with respect to the total weight (100 weight%) of the non-volatile component of oil-based ink, More preferably, it is 60 weight% or more. More preferably, it is 70% by weight or more. When the content is 50% by weight or more, the adhesiveness to the label substrate or the metal pigment-containing print layer is good, which is preferable. The upper limit of the content is not particularly limited, and may be 100% by weight. When the oil-based ink contains a colorant, the oil-based ink is not particularly limited, but the oil-based ink is 5 to 50% by weight of the colorant and the binder resin with respect to the total weight (100% by weight) of the non-volatile components in the oil-based ink. It is more preferable to contain 50 to 95% by weight. On the other hand, when the oil-based ink does not contain a colorant, the content of the binder resin is not particularly limited, but is 80% by weight or more based on the total weight (100% by weight) of the nonvolatile components in the oil-based ink. More preferably, it is 90% by weight or more.

  Although content of the non-volatile component (for example, binder resin etc.) in the said oil-based ink is not specifically limited, 30 to 70 weight% is preferable with respect to the total weight (100 weight%) of oil-based ink.

  Although content of the volatile component (for example, organic solvent etc.) in the said oil-based ink is not specifically limited, 30 to 70 weight% is preferable with respect to the total weight (100 weight%) of oil-based ink.

  The oil-based ink is produced, for example, by mixing the binder resin, the organic solvent, and other additives as necessary. The mixing can be performed by a known or conventional mixing method, and is not particularly limited. For example, a mixing device illustrated and described as the above-described aqueous ink mixing device can be used. The mixing time (retention time) during mixing is not particularly limited, but is preferably 10 to 120 minutes. The obtained oil-based ink may be used after being filtered, if necessary. Each of the above components may be used alone or in combination of two or more.

  Although the viscosity (23 ± 2 ° C.) of the oil-based ink is not particularly limited, for example, when applied by gravure printing, 10 to 1000 mPa · s is preferable, and 20 to 500 mPa · s is more preferable. The viscosity of the oil-based ink can be controlled by the type and blending amount (content) of a binder resin, a solvent, and other components, a thickener, a thinning agent, and the like.

(When the plastic label of the present invention satisfies the above (3))
When the plastic label of the present invention satisfies the above (3), the transparent printing layer is a printing layer formed by curing a curable composition layer. The curable composition layer is a curable composition layer, which is applied with a curable printing ink (sometimes referred to as a “curable ink”), and is dried or solidified as necessary. It is formed. Examples of the method for curing the curable composition layer include curing by irradiation with active energy rays, curing by heat (thermal curing), two-component reaction type curing, curing by moisture (humidity curing), and the like. That is, examples of the curable composition layer include an active energy ray curable composition layer, a thermosetting composition layer, a two-component reaction curable composition layer, and a moisture curable composition layer. As the curable composition layer, an active energy ray curable composition layer and a two-component reaction curable composition layer are particularly preferable.

  Although it does not specifically limit as an active energy ray which hardens the said active energy ray curable composition layer or the said curable ink, For example, visible light, an ultraviolet-ray, an electron beam etc. are mentioned. The active energy ray curable composition layer is preferably an ultraviolet curable composition layer or an electron beam curable composition layer.

  Examples of the curable ink include active energy ray curable ink, thermosetting ink, two-component reaction curable ink, moisture curable ink, curable oily ink, and curable aqueous ink. . Among these, active energy ray-curable inks, curable oily inks, and curable aqueous inks are preferable. Moreover, as said active energy ray curable ink, an ultraviolet curable ink and an electron beam curable ink are preferable.

  In the present specification, the active energy ray-curable ink is an active energy ray-polymerizable monomer or an oligomer that is a polymer having a low polymerization degree of the active energy ray-polymerizable monomer (referred to as “active energy ray-polymerizable oligomer”). A printing ink that contains a printing ink and is irradiated with an active energy ray to polymerize the active energy ray polymerizable monomer or the active energy ray polymerizable oligomer to form a printing layer. Say. The active energy ray-curable ink is mainly composed of the active energy ray polymerizable monomer and the active energy ray polymerizable oligomer, and hardly contains a dispersion medium or a solvent, and needs to be dried and solidified when forming a printing layer. Those without are common.

  On the other hand, the water-based ink having curability is a water-based ink described in the case where the above (1) is satisfied, and refers to a printing ink capable of curing reaction. Specifically, the curable water-based ink is a printing ink that contains at least an aqueous resin, water, and alcohol, and forms a coating film by removing volatile components by applying the printing ink and drying and solidifying it. A printing ink capable of curing reaction. The same applies to curable oil-based inks, which are oil-based inks described in the case of satisfying the above (2) and are printing inks that can undergo a curing reaction. Specifically, the oil-based ink having curability contains at least a resin and an organic solvent, and is a printing ink that forms a coating film by removing volatile components by applying and drying and solidifying the printing ink, A printing ink capable of curing reaction.

  The total content of the active energy ray-polymerizable monomer and the active energy ray-polymerizable oligomer in the active energy ray-curable ink is, for example, 50 with respect to the total weight (100% by weight) of the active energy ray-curable ink. About 60% by weight or more, preferably about 60% by weight or more, more preferably about 70% by weight or more, and further preferably about 80% by weight or more. The upper limit may be 100% by weight.

  When the curable composition layer is formed from an active energy ray curable ink, the curable composition layer is an active energy ray curable composition layer and is provided by applying the active energy ray curable ink. It is done. Furthermore, in this case, the transparent printing layer is formed by curing the active energy ray-polymerizable monomer or active energy ray-polymerizable oligomer in the active energy ray-curable composition layer by polymerizing by irradiation with active energy rays. .

  The active energy ray polymerizable monomer is a monomer having at least one active energy ray polymerizable functional group in the molecule. The active energy ray-polymerizable functional group is not particularly limited as long as it is a group that can be polymerized by irradiation with active energy rays, and examples thereof include an active energy ray radical polymerizable group and an active energy ray cationic polymerizable group. It is done. Among them, an active energy ray radical polymerizable group is preferable, and a group containing a carbon-carbon unsaturated bond such as an ethylenically unsaturated group is more preferable. More specific examples of the ethylenically unsaturated group include a vinyl group, a propenyl group, an isopropenyl group, and a (meth) acryloyl group (acryloyl group, methacryloyl group). Examples of the active energy ray cationic polymerizable group include an epoxy group, an oxetanyl group, and an oxolanyl group.

  Examples of the active energy ray polymerizable monomer include monofunctional monomers and polyfunctional monomers. The monofunctional monomer is a monomer having only one active energy ray polymerizable functional group in the molecule. The polyfunctional monomer is a monomer having two or more active energy ray polymerizable functional groups in the molecule.

  Examples of the monofunctional monomer that is an active energy ray radically polymerizable monomer include known monofunctional monomers having an ethylenically unsaturated group, and are not particularly limited. For example, in the oil-based ink for forming the transparent printing layer described above, Acrylic monomers exemplified and described as acrylic monomers constituting the acrylic resin as the binder resin; carboxyl group-containing polymerizable unsaturated compounds such as crotonic acid, itaconic acid, fumaric acid, maleic acid or the like; and styrene Styrene compounds such as vinyltoluene and α-methylstyrene; vinyl esters such as vinyl acetate and vinyl propionate; vinyl halides such as vinyl chloride; vinyl ethers such as methyl vinyl ether; and cyano groups such as (meth) acrylonitrile Vinyl compounds; Ethylene , Alpha-olefins such as propylene; N- acryloyloxyethyl hexahydrophthalimide; acryloyl morpholine; and 2-hydroxy-3-phenoxypropyl acrylate.

  The active energy ray curable ink is not particularly limited, but preferably contains a photopolymerization initiator. Although it does not specifically limit as said photoinitiator, A well-known thru | or usual photoinitiator can be used. The photopolymerization initiator is not particularly limited, but a photoradical polymerization initiator is preferable. The radical photopolymerization initiator is not particularly limited, and examples thereof include benzoin ether photopolymerization initiators, acetophenone photopolymerization initiators, α-ketol photopolymerization initiators, and aromatic sulfonyl chloride photopolymerization initiators. Examples include photoactive oxime photopolymerization initiators, benzoin photopolymerization initiators, benzyl photopolymerization initiators, benzophenone photopolymerization initiators, ketal photopolymerization initiators, and thioxanthone photopolymerization initiators. Only 1 type may be used for the said photoinitiator, and 2 or more types may be used for it.

  Commercially available products may be used as the photopolymerization initiator, and examples thereof include trade names “Darocur Series” and “Irgacure Series” manufactured by BASF Japan Ltd.

  Although content of the said photoinitiator is not specifically limited, 0.1-20 weight% is preferable with respect to the total weight (100 weight%) of the non-volatile component in active energy ray-curable ink, More preferably 1 to 18% by weight, more preferably 7 to 15% by weight.

  The active energy ray-curable ink contains components (additives) other than the active energy ray polymerizable monomer, the active energy ray polymerizable oligomer, and the photopolymerization initiator within a range not impairing the effects of the present invention. You may contain. Although it does not specifically limit as said additive, The additive etc. which were illustrated and demonstrated as an additive which may be contained in a solvent, resin, a sensitizer, and the above-mentioned water-based ink and oil-based ink, etc. are mentioned. Only 1 type may be used for the said additive and 2 or more types may be used for it. Examples of the resin include resins exemplified and described as binder resins contained in the oil-based ink forming the above-described transparent printing layer.

  The active energy ray curable ink is produced, for example, by mixing the active energy ray polymerizable monomer, the active energy ray polymerizable oligomer, the photopolymerization initiator, and other additives as necessary. The The mixing can be performed by a known or conventional mixing method, and is not particularly limited. For example, a mixing device illustrated and described as the above-described aqueous ink mixing device can be used. The mixing time (retention time) during mixing is not particularly limited, but is preferably 10 to 120 minutes. The obtained active energy ray-curable ink may be used after filtration, if necessary. Each of the above components may be used alone or in combination of two or more.

  The viscosity (23 ± 2 ° C.) of the active energy ray-curable ink is not particularly limited, but is preferably 10 to 1000 mPa · s, more preferably 20 to 500 mPa · s, for example, when applied by gravure printing. s. The viscosity of the active energy ray-curable ink is determined by the type and amount (content) of the active energy ray polymerizable monomer, active energy ray polymerizable oligomer, photopolymerization initiator and other components, thickener, It can be controlled by a sticky agent or the like.

  Examples of the curable water-based ink include active energy ray-curable water-based ink, thermosetting water-based ink, and two-component reaction-curable water-based ink. Among these, an active energy ray-curable water-based ink and a two-component reaction-curable water-based ink are preferable.

  Although it does not specifically limit as said 2 liquid reaction hardening type water-based ink, The water-based ink demonstrated in the case where the above-mentioned (1) is satisfy | filled further contains a hardening | curing agent, The component which has reactivity with this hardening | curing agent. A two-component reaction curable aqueous ink using a combination of the main ingredient (A1 agent) and the curing agent (B1 agent) is preferred. The active energy ray-curable aqueous ink is not particularly limited, but an aqueous ink containing an aqueous resin having a functional group that can be polymerized by active energy rays is preferable.

  When the curable composition layer is formed from a curable aqueous ink, the curable composition layer is provided by applying and drying (drying and solidifying) the curable aqueous ink. Furthermore, in this case, the transparent printing layer may be formed by curing the curable composition by irradiation with active energy rays, heating, moisture, or the like. When the curable water-based ink is a two-component reaction curable water-based ink using a combination of the A1 agent and the B1 agent, the curable composition layer is a two-component reaction curable composition layer. Further, the transparent printing layer may be formed by curing without performing an operation on the two-component reaction curable composition layer, but may be formed by appropriately performing a treatment such as heating or aging. . When the curable aqueous ink is an aqueous ink containing an aqueous resin having a functional group polymerizable by the active energy ray, the curable composition layer is an active energy ray curable composition layer. . And the said transparent printing layer hardens | cures and forms by irradiating the said active energy ray curable composition layer with an active energy ray.

  The aqueous ink containing an aqueous resin having a functional group that can be polymerized by the active energy rays preferably further contains a photopolymerization initiator. As said photoinitiator, the photoinitiator illustrated and demonstrated as the photoinitiator which the above-mentioned active energy ray hardening-type ink may contain, for example is mentioned. Only 1 type may be used for the said photoinitiator, and 2 or more types may be used for it. Although content of the said photoinitiator is not specifically limited, 0.1-20 weight% is preferable with respect to the total weight (100 weight%) of the non-volatile component in water-based ink.

  Although it does not specifically limit as said hardening | curing agent (The hardening | curing agent in the said two-component reaction mixing type water-based ink), Aziridine type hardening | curing agent and a carbodiimide type hardening | curing agent are preferable.

  Examples of the aziridine-based curing agent include trimethylolpropane tris [3- (1-aziridinyl) propionate], trimethylolpropane tris [3- (1- (2-methyl) aziridinylpropionate)], N , N′-toluene-2,4-bis (1-aziridinecarboxylate), N, N′-diphenylmethane-4,4′-bis (1-aziridinecarboxylate), triethylenemelamine, bisisoprotaloyl-1 -(2-methylaziridine), tri-1-aziridinylphosphine oxide, tetramethylolmethane-tri-β-aziridinylpropionate, 2,2′-bishydroxymethylbutanol-tris [3- (1- Aziridinyl) propionate], 1,6-hexamethylenediethylene urea, N, N′-diphenyl Tan-4,4'-bis (1-aziridine carboxyamide), N, N'-hexamethylene-1,6-bis (1-aziridine carboxyamide), and the like. Only 1 type may be used for the said aziridine type hardening | curing agent, and 2 or more types may be used for it. A commercial item can also be used for the aziridine-based curing agent. For example, “Chemite Series” manufactured by Nippon Shokubai Co., Ltd. is available on the market.

  Examples of the carbodiimide curing agent include dicyclohexylmethane carbodiimide, dicyclohexyl carbodiimide, tetramethylxylylene carbodiimide, urea-modified carbodiimide, and the like. As for the said carbodiimide type hardening | curing agent, only 1 type may be used and 2 or more types may be used. A commercial item can also be used for the said carbodiimide type hardening | curing agent. For example, “Carbodilite series” manufactured by Nisshinbo Chemical Co., Ltd. is available on the market.

  A combination of the component having reactivity with the curing agent and the curing agent is not particularly limited, but an aqueous resin having a carboxyl group and an aziridine-based curing agent, and an aqueous resin having a carboxyl group and a carbodiimide-based curing agent are preferable.

  In the two-component reaction curable water-based ink, the content of the curing agent is not particularly limited, but the total weight (100% by weight) of non-volatile components in the two-component reaction curable water-based ink (after mixing the two components). The content is preferably 5 to 30% by weight, more preferably 10 to 25% by weight, and still more preferably 12 to 22% by weight. When the content is 5% by weight or more, it is preferable that the printed layer is sufficiently cured and is not easily dissolved by the printing ink forming the adjacent metal pigment-containing printed layer. When the content is 30% by weight or less, the transparent printing layer does not become too hard and shrinkage whitening hardly occurs, which is preferable.

  The two-component reaction-curable water-based ink is the water-based ink described in the case where the above (1) is satisfied in addition to the water-based resin, water, alcohol, the component having reactivity with the curing agent, and the curing agent. The additive which may be contained in the inside may be contained in the range which does not impair the effect of this invention. Only 1 type may be used for the said additive and 2 or more types may be used for it. The components having reactivity with the aqueous resin and the curing agent are preferably the same substance.

  The curable water-based ink is produced, for example, by mixing the water-based resin, water, alcohol, a component reactive with the curing agent, the curing agent, and other additives as necessary. The The mixing can be performed by a known or conventional mixing method, and is not particularly limited. For example, the mixing device illustrated and described as the water-based ink mixing device described in the case of satisfying the above (1) is used. it can. The mixing time (retention time) during mixing is not particularly limited, but is preferably 10 to 120 minutes. The obtained water-based ink having curability may be used after being filtered, if necessary. Each of the above components may be used alone or in combination of two or more. In addition, when the curable water-based ink is a two-component reaction-curable water-based ink using a combination of the A1 agent and the B1 agent, the A1 agent and the B1 agent are separately prepared and mixed immediately before coating. May be.

  The viscosity (23 ± 2 ° C.) of the curable water-based ink is not particularly limited, but is preferably 10 to 1000 mPa · s, more preferably 20 to 500 mPa · s, for example, when applied by gravure printing. s. The viscosity of the curable water-based ink can be controlled by the type and amount (content) of the water-based resin, water, alcohol, curing agent and other components, the thickener, the thinning agent, and the like. is there.

  Examples of the curable oily ink include an active energy ray curable oily ink, a thermosetting oily ink, a two-component reaction curable oily ink, and a moisture curable oily ink. Of these, active energy ray curable oily ink and two-component reaction curable oily ink are preferable.

  The active energy ray-curable oil-based ink is not particularly limited, but an oil-based ink containing an active energy ray-polymerizable polymer compound is preferable. Although it does not specifically limit as said 2 liquid reaction hardening type oil-based ink, A hardening | curing agent is further added to the oil-based ink (ink containing a binder resin and an organic solvent as an essential component) demonstrated in the case where said (2) is satisfy | filled. A two-component reaction-curable oil-based ink containing a main component (A2 agent) containing a component having reactivity with the curing agent and the curing agent (B2 agent) is preferable. Among these oil-based inks having curable properties, oil-based inks containing an active energy ray polymerizable polymer compound are particularly preferable.

  When the curable composition layer is formed from curable oil-based ink, the curable composition layer is provided by applying and drying (dry-solidifying) the curable oil-based ink. Furthermore, in this case, the transparent printing layer may be formed by curing the curable composition by active energy ray irradiation, heating, moisture, or the like. When the oil-based ink having the curable property is an oil-based ink containing the active energy ray-polymerizable polymer compound, the curable composition layer is an active energy ray-curable composition layer. The transparent printing layer is formed by curing when the active energy ray polymerizable functional group in the active energy ray polymerizable polymer compound in the active energy ray curable composition layer is polymerized by irradiation with active energy ray. Is done. Moreover, when the oil-based ink having the curable property is a two-component reaction curable type oil-based ink using a combination of the A2 agent and the B2 agent, the curable composition layer is a two-component reaction curable composition layer. Further, the transparent printing layer may be formed by curing without performing an operation on the two-component reaction curable composition layer, but may be formed by appropriately performing a treatment such as heating or aging. .

  Examples of the active energy ray-polymerizable polymer compound include a polymer compound having an active energy ray-polymerizable functional group at the side chain and / or terminal of the resin (sometimes referred to as “polymer compound (A)”). A polymer compound having a resin as a main chain and an oligomer having an active energy ray-polymerizable functional group as a side chain (sometimes referred to as “polymer compound (B)”) or the like, having one or more activities in the molecule Examples thereof include a polymer compound having an energy ray polymerizable functional group. Although it does not specifically limit as resin in the said active energy ray polymeric high molecular compound, Acrylic resin is preferable. The active energy ray polymerizable polymer compound becomes a binder resin when the transparent printing layer is formed.

  The active energy ray polymerizable functional group in the active energy ray polymerizable polymer compound is exemplified and explained as the active energy ray polymerizable functional group of the active energy ray polymerizable monomer described above. Etc. Among them, an active energy ray radical polymerizable group is preferable, an ethylenically unsaturated group is more preferable, and a (meth) acryloyl group is more preferable.

  Although it does not specifically limit as resin in the said high molecular compound (A), The resin etc. which were illustrated and demonstrated as binder resin contained in the above-mentioned oil-based ink are mentioned, Among these, acrylic resin is preferable.

  Although the weight average molecular weight (Mw) of the said high molecular compound (A) is not specifically limited, 3,000-100,000 are preferable, More preferably, it is 10,000-50,000, More preferably, it is 15,000-35,000. is there. When the Mw is 3,000 or more, it becomes difficult to dissolve when a printing ink for forming an adjacent metal pigment-containing printing layer is applied, which is preferable. When the Mw is 100,000 or less, the viscosity of the printing ink becomes good and the printability is improved, which is preferable.

  Although the double bond equivalent of the said high molecular compound (A) is not specifically limited, 50-2,000 g / mol is preferable, More preferably, it is 100-1,000 g / mol, More preferably, it is 200-700 g / mol. . If the double bond equivalent is 50 g / mol or more, the printed layer will have sufficient hardness, so it will be more difficult to dissolve when the printing ink that forms the adjacent metal pigment-containing printed layer is applied. ,preferable. When the double bond equivalent is 2,000 g / mol or less, the printed layer does not become too hard and shrinkage whitening hardly occurs, which is preferable.

  A commercially available product may be used as the polymer compound (A). As a commercially available product, for example, “Acryt 8KX Series” manufactured by Taisei Fine Chemical Co., Ltd. is available on the market.

  In the polymer compound (B), the side chain oligomer has the active energy ray polymerizable group. Although the position of the active energy ray polymerizable group in the oligomer is not particularly limited, the end of the oligomer (the end opposite to the side bonded to the main chain) is preferable.

  Although it does not specifically limit as resin in the said high molecular compound (B), The resin etc. which were illustrated and demonstrated as a binder resin contained in the above-mentioned oil-based ink are mentioned, Especially, acrylic resin is preferable. The oligomer is not particularly limited, but a urethane oligomer is preferable.

  Although the weight average molecular weight (Mw) of the said high molecular compound (B) is not specifically limited, 5,200-300,000 are preferable, More preferably, it is 50,000-280,000, More preferably, it is 100,000-250,000.

  Although the double bond equivalent of the said high molecular compound (B) is not specifically limited, 300-3,000 g / mol is preferable, More preferably, it is 500-2,500 g / mol, More preferably, it is 600-2,000 g / mol. It is.

  A commercially available product may be used as the polymer compound (B). As a commercially available product, for example, “Acryt 8BR Series” manufactured by Taisei Fine Chemical Co., Ltd. is available on the market.

  When the active energy ray-curable oil-based ink contains the polymer compound (A) or the polymer compound (B), the content of the polymer compound (A) or the polymer compound (B) is: Although not particularly limited, it is preferably 30% by weight or more, more preferably 40% by weight or more, and still more preferably 50% by weight with respect to the total weight (100% by weight) of the nonvolatile components in the active energy ray-curable oil-based ink. Above, particularly preferably 60% by weight or more, most preferably 70% by weight or more. The upper limit of the content may be 100% by weight, 95% by weight, or 90% by weight. In addition, when the active energy ray-curable oil-based ink contains both the polymer compound (A) and the polymer compound (B), the polymer compound (A) and the polymer compound (B) The total content is preferably within the above range.

  The oil-based ink containing the active energy ray-polymerizable polymer compound is not particularly limited, but preferably contains a photopolymerization initiator. Although it does not specifically limit as said photoinitiator, For example, the photoinitiator illustrated and demonstrated as the photoinitiator which the above-mentioned active energy ray hardening-type ink may contain is mentioned. Only 1 type may be used for the said photoinitiator, and 2 or more types may be used for it.

  Although content of the said photoinitiator is not specifically limited, 0.1-20 weight with respect to the total weight (100 weight%) of the non-volatile component in the oil-based ink containing an active energy ray polymeric polymer compound. % Is preferable, more preferably 1 to 18% by weight, still more preferably 7 to 15% by weight.

  The oil-based ink containing the active energy ray-polymerizable polymer compound is a component (additive) other than the active energy ray-polymerizable polymer compound, the organic solvent, and the photopolymerization initiator. You may contain within the range which does not impair. Although it does not specifically limit as said additive, The additive etc. which were illustrated and demonstrated as an additive which may be contained in a sensitizer and the above-mentioned oil-based ink are mentioned. Only 1 type may be used for the said additive and 2 or more types may be used for it.

  The oil-based ink containing the active energy ray-polymerizable polymer compound is mixed, for example, with the active energy ray-polymerizable polymer compound, the photopolymerization initiator, the organic solvent, and other additives as necessary. It is manufactured by doing. The mixing can be performed by a known or conventional mixing method, and is not particularly limited. For example, a mixing device illustrated and described as the above-described aqueous ink mixing device can be used. The mixing time (retention time) during mixing is not particularly limited, but is preferably 10 to 120 minutes. The obtained active energy ray-curable oil-based ink may be used after being filtered, if necessary. Each of the above components may be used alone or in combination of two or more.

  Although it does not specifically limit as said hardening | curing agent (hardening agent in the said 2 liquid reaction mixing type oil-based ink), An isocyanate type hardening | curing agent, an epoxy-type hardening | curing agent, an aziridine type hardening | curing agent, and a carbodiimide type hardening | curing agent are preferable.

  Examples of the isocyanate curing agent include known aromatic, aliphatic and alicyclic diisocyanates. Examples of the diisocyanates include tolylene diisocyanate, 4,4-diphenylmethane diisocyanate, 1,3-phenylene diisocyanate, hexamethylene diisocyanate, xylylene diisocyanate, 1,5-naphthalene diisocyanate, and isophorone diisocyanate. If necessary, tri- or higher functional polyisocyanates and polyisocyanate adducts can be mixed with the diisocyanates. Only 1 type may be used for the said isocyanate type hardening | curing agent, and 2 or more types may be used for it.

  Examples of the aziridine-based curing agent include aziridine-based curing agents exemplified and described as curing agents that may be included in the above-described two-component reaction-curable aqueous ink. Examples of the carbodiimide-based curing agent include carbodiimide-based curing agents exemplified and described as curing agents that may be included in the above-described two-component reaction-curable aqueous ink.

  The combination of the component having reactivity with the curing agent and the curing agent is not particularly limited, but includes a binder resin having a carboxyl group and an isocyanate curing agent, a binder resin having a carboxyl group, an epoxy curing agent, and a carboxyl group. A binder resin and an aziridine type curing agent having a carboxyl group, a binder resin having a carboxyl group and a carbodiimide type curing agent, a binder resin having a hydroxyl group and an isocyanate type curing agent are preferred.

  In the two-component reaction curable oil-based ink, the content of the curing agent is not particularly limited, but the total weight (100% by weight) of non-volatile components in the two-component reaction curable oil-based ink (after mixing two components). The content is preferably 5 to 30% by weight, more preferably 10 to 25% by weight, and still more preferably 12 to 22% by weight. When the content is 5% by weight or more, it is preferable that the printed layer is sufficiently cured and is not easily dissolved by the printing ink forming the adjacent metal pigment-containing printed layer. When the content is 30% by weight or less, the transparent printing layer does not become too hard and shrinkage whitening hardly occurs, which is preferable.

  In addition to the binder resin, the organic solvent, the component having reactivity with the curing agent, and the curing agent, the two-component reaction curing type oil-based ink using the combination of the A2 agent and the B2 agent is the above-mentioned (2). The additive which may be contained in the oil-based ink described in the case of satisfying may be contained within a range not impairing the effects of the present invention. Only 1 type may be used for the said additive and 2 or more types may be used for it. In addition, it is preferable that the component which has the reactivity with the said binder resin and the said hardening | curing agent is the same substance.

  The two-component reaction-curable oil-based ink used in combination of the A2 agent and the B2 agent, for example, if necessary, the binder resin, the organic solvent, a component having reactivity with the curing agent, the curing agent, and Manufactured by mixing other additives. The mixing can be performed by a known or conventional mixing method, and is not particularly limited. For example, a mixing device illustrated and described as the above-described aqueous ink mixing device can be used. The mixing time (retention time) during mixing is not particularly limited, but is preferably 10 to 120 minutes. The obtained two-component reaction-curable oil-based ink may be used after being filtered, if necessary. Each of the above components may be used alone or in combination of two or more. Moreover, A2 agent and B2 agent may be produced separately, and may be mixed just before application | coating.

  The viscosity (23 ± 2 ° C.) of the curable oil-based ink is not particularly limited, but is preferably 10 to 1000 mPa · s, more preferably 20 to 500 mPa · s, for example, when applied by gravure printing. s. The viscosity of the curable oil-based ink is the active energy ray-polymerizable polymer compound, photopolymerization initiator, binder resin, organic solvent, curing agent and other components, and the amount (content), thickening. It can be controlled by an agent, a viscosity reducing agent or the like.

(When the plastic label of the present invention satisfies the above (4))
When the plastic label of this invention satisfy | fills said (4), the said transparent printing layer is a printing layer formed with oil-based ink or water-based ink. Examples of the oil-based ink include the oil-based ink described in the case where the above-described plastic label of the present invention satisfies the above (2). In addition, the preferable aspect of the said oil-based ink is also the same as the preferable aspect of the oil-based ink demonstrated in the case where the plastic label of the above-mentioned this invention satisfy | fills said (2). Moreover, as said water-based ink, the water-based ink etc. which were demonstrated when the above-mentioned plastic label of this invention satisfy | fills said (1) are mentioned. In addition, the preferable aspect of the said water-based ink is also the same as the preferable aspect of the water-based ink demonstrated in the case where the plastic label of the above-mentioned this invention satisfy | fills said (1).

[Metallic pigment-containing printing layer]
The metal pigment-containing printed layer is an essential layer in the plastic label of the present invention. The said metal pigment containing printing layer is provided in the at least one surface of the label base material. The metal pigment-containing print layer may be provided on the entire surface of at least one surface of the label base material, or may be provided partially. Moreover, the plastic label of the present invention may have only one metal pigment-containing print layer or two or more layers. The metal pigment-containing printing layer preferably contains a metal pigment and a binder resin as essential components.

  Although the said metal pigment is not specifically limited, The metal pigment used for metal color inks, such as well-known thru | or usual silver ink, can be used. Although the said metal pigment is not specifically limited, The pigment made from metals, such as aluminum, bronze (bronze), copper, zinc, brass, titanium, tin, is mentioned. Among these, a pigment made from aluminum (aluminum pigment) is preferable. The said metal pigment may use only 1 type and may use 2 or more types. The metal pigment may be a pigment made from two or more alloys of the above metals. The metal pigment may be subjected to surface treatment such as resin coating.

  Although the shape of the said metal pigment is not specifically limited, For example, granular, plate shape, lump shape, flake shape (scale shape) etc. are mentioned. Among these, from the viewpoint of further improving the metallic gloss, scaly shape is preferable.

  Although the median diameter (D50) of the said metal pigment is not specifically limited, 0.1-50 micrometers is preferable, More preferably, it is 1-30 micrometers.

  In this specification, the median diameter (D50) of a metal pigment is a median diameter in a volume reference distribution. The average particle diameter can be measured by a laser diffraction method. More specifically, it can be measured by, for example, “Microtrac (Microtrack) HRA9320-X100” manufactured by Honeywell, “Microtrac (Microtrack) MT3000” manufactured by Nikkiso Co., Ltd., or the like.

  Although the thickness (average thickness) of the said metal pigment is not specifically limited, 0.01-3 micrometers is preferable, More preferably, it is 0.02-2 micrometers. In this specification, the average thickness of a metal pigment can be calculated | required by measuring the thickness of arbitrary 10 metal pigments by scanning electron microscope (SEM) observation, for example.

  Although the said aluminum pigment is not specifically limited, A leafing type aluminum pigment may be sufficient, a non-leafing type aluminum pigment may be sufficient, and a vapor deposition aluminum pigment may be sufficient.

  The non-leafing aluminum pigment has a property of being uniformly dispersed and arranged in a coating film (film) of printing ink. The leafing type aluminum pigment and the non-leafing type aluminum pigment are preferably aluminum pigments produced by ball milling (sometimes referred to as “ball mill method” or “wet ball mill method”).

  Among the above-described aluminum pigments, vapor-deposited aluminum pigments are preferable. The said vapor deposition aluminum pigment is the aluminum flakes manufactured by the vapor deposition method. The above-mentioned vapor deposition method refers to a vapor deposition metal in which aluminum is vapor-deposited on a suitable support substrate (film, etc.) to produce a vapor-deposited aluminum film, which is then peeled, pulverized, and classified as necessary to form a flake. This is a method for producing a film strip (evaporated aluminum flake) (see, for example, JP-A-2002-20668). According to said vapor deposition method, compared with the case where it manufactures by the conventional ball mill method etc., aluminum flakes with plate shape and thinner thickness and a higher aspect ratio can be obtained. For this reason, in the metal pigment-containing print layer, the aluminum flakes, which are metal pigments, are easily oriented in the direction parallel to the surface of the plastic label, and the orientation is improved, and the incident light is easily reflected regularly. For this reason, the mirror glossiness of the metal pigment-containing printing layer is improved, and the metal gloss is further improved by exhibiting excellent metal gloss. In addition, the said vapor deposition aluminum pigment may use only 1 type, and may mix and use 2 or more types of different vapor deposition aluminum pigments.

  Although D50 of the said vapor deposition aluminum pigment is not specifically limited, 1-30 micrometers is preferable, More preferably, it is 5-20 micrometers. When the D50 is 1 μm or more, the specular gloss is improved, which is preferable. If the D50 exceeds 30 μm, blurring may occur when printing ink is gravure-printed.

  Although the thickness of the said vapor deposition aluminum pigment is not specifically limited, Less than 0.1 micrometer is preferable. Moreover, although the average thickness of the said vapor deposition aluminum pigment is not specifically limited, 0.01 micrometer or more and less than 0.1 micrometer are preferable, More preferably, it is 0.01-0.07 micrometer. If the average thickness is less than 0.01 μm, the production efficiency may be poor industrially. On the other hand, when the thickness and the average thickness are less than 0.1 μm, the orientation of the metal pigment in the metal pigment-containing printing layer is improved, and the metallic gloss is improved, which is preferable.

  A commercial item can also be used for the said vapor deposition aluminum pigment. For example, “Metacene 71-0010”, “Metacene 41-0010” manufactured by Toyo Aluminum Co., Ltd., “Metal Ar A41010AE” manufactured by Ecart Co., etc. are available on the market.

  The content of the metal pigment in the metal pigment-containing printing layer is not particularly limited, but is preferably 5 to 30% by weight, more preferably based on the total weight (100% by weight) of the metal pigment-containing printing layer. 10 to 25% by weight. When the content is 5% by weight or more, the metallic gloss of the plastic label is more excellent and preferable. When the content is 30% by weight or less, the adhesiveness to the label substrate and the transparent printing layer is excellent, which is preferable.

  Although content of the said binder resin in the said metal pigment containing printing layer is not specifically limited, From a viewpoint of adhesiveness with a label base material or a transparent printing layer, it is the total weight (100 weight%) of a metal pigment containing printing layer. On the other hand, it is preferably 15 to 70% by weight, more preferably 20 to 65% by weight. In addition, in order to control the content of each component (for example, metal pigment, binder resin, etc.) in the metal pigment-containing print layer, each component in the non-volatile component of the printing ink forming the metal pigment-containing print layer The printing ink may be prepared so that the content of is the desired content in the metal pigment-containing printing layer. In general, the content (% by weight) of each component in all the non-volatile components of the printing ink is equal to the content (% by weight) of each component in the metal pigment-containing printing layer.

  Although the thickness of the said metal pigment containing printing layer is not specifically limited, 0.1-5 micrometers is preferable, More preferably, it is 0.2-3 micrometers. When the thickness is 0.1 μm or more, the effect of improving the metallic luster due to having the metal pigment-containing printing layer can be sufficiently obtained, which is preferable. When the thickness is 5 μm or less, the drying property of the coating film formed with oil-based ink or water-based ink is good, which is preferable.

(When the plastic label of the present invention satisfies the above (1))
When the plastic label of this invention satisfy | fills said (1), the said metal pigment containing printing layer is a printing layer formed with oil-based ink. More specifically, the metal pigment-containing printing layer is obtained by applying the oil-based ink to at least one surface of the label base material, and drying (drying solidification) to part or all of the volatile components in the oil-based ink. Is removed and formed. Moreover, you may make it harden | cure after apply | coating and drying (dry solidification) as needed. The oil-based ink is preferably an ink containing a binder resin, the metal pigment, and an organic solvent as essential components.

  The binder resin is not particularly limited, and a known or conventional printing layer or binder resin for printing ink can be used. The binder resin is not particularly limited, but plays a role as a main resin component for forming the metal pigment-containing print layer, and forms a coating film when the printing ink for forming the metal pigment-containing print layer is coated. It is. Although it does not specifically limit as said binder resin, The binder resin etc. which were illustrated and demonstrated as binder resin contained in the oil-based ink which forms the above-mentioned transparent printing layer are mentioned. Among these, in the case where the plastic label of the present invention is a shrink label, a urethane-based resin is preferable from the viewpoint of maintaining a high metallic gloss even after shrink processing. Only 1 type may be used for the said binder resin and 2 or more types may be used for it.

  Although it does not specifically limit as said urethane type resin, For example, the urethane type resin illustrated and demonstrated as the urethane type resin which may be contained in the oil-based ink which forms the above-mentioned transparent printing layer, etc. are mentioned. Among the urethane resins, polyester diol polyurethane (polyurethane obtained using polyester diol as a polyol compound) is preferable.

  Although the glass transition temperature (Tg) of the said urethane type resin is not specifically limited, From a softness | flexibility viewpoint, -60-40 degreeC is preferable, More preferably, it is -50-30 degreeC.

  The weight average molecular weight (Mw) of the urethane resin is not particularly limited, but is preferably 10,000 to 100,000, more preferably 20,000 to 80,000, and still more preferably 30,000 to 70,000 from the viewpoint of scratch resistance. It is.

  Although content of the said binder resin in the said oil-based ink is not specifically limited, From a viewpoint of adhesiveness with a label base material or a transparent printing layer, with respect to the total weight (100 weight%) of the non-volatile component in oil-based ink. It is preferably 15 to 70% by weight, more preferably 20 to 65% by weight.

  Although content of the said metal pigment in the said oil-based ink is not specifically limited, 5-30 weight% is preferable with respect to the total weight (100 weight%) of the non-volatile component in oil-based ink, More preferably, it is 10-25. % By weight. When the content is 5% by weight or more, the metallic gloss of the plastic label is more excellent and preferable. When the content is 30% by weight or less, the adhesiveness to the label substrate and the transparent printing layer is excellent, which is preferable.

  Although content of the non-volatile component (for example, binder resin, a metal pigment, etc.) in the said oil-based ink is not specifically limited, 10-70 weight% is preferable with respect to the total weight (100 weight%) of oil-based ink.

  Although content of the volatile component (for example, organic solvent etc.) in the said oil-based ink is not specifically limited, 30 to 90 weight% is preferable with respect to the total weight (100 weight%) of oil-based ink.

  As the organic solvent, organic solvents that are usually used in oil-based inks such as gravure printing and flexographic printing can be used. For example, the organic solvent is exemplified and described as the organic solvent contained in the oil-based ink forming the transparent printing layer. And organic solvents. Only 1 type may be used for the said organic solvent, and 2 or more types may be used for it. The organic solvent can be removed by drying after applying oil-based ink to the label substrate.

  The oil-based ink may have curability (for example, active energy ray curability, heat curability, two-component reaction curability, moisture curability, and the like). That is, the metal pigment-containing print layer may be a print layer formed by curing a curable composition layer formed with a curable oil-based ink.

  The oil-based ink may contain components (additives) other than the metal pigment, the binder resin, and the organic solvent as long as the effects of the present invention are not impaired. Although it does not specifically limit as said additive, The additive etc. which were illustrated and demonstrated as an additive which may be contained in the oil-based ink which forms the above-mentioned transparent printing layer are mentioned. Only 1 type may be used for the said additive and 2 or more types may be used for it.

  The oil-based ink is produced, for example, by mixing the metal pigment, the binder resin, the organic solvent, and other additives as necessary. The mixing can be performed by a known or conventional mixing method, and is not particularly limited. For example, a mixing device illustrated and described as a mixing device for the water-based ink for forming the above-described transparent printing layer can be used. The mixing time (retention time) during mixing is not particularly limited, but is preferably 10 to 120 minutes. The obtained oil-based ink may be used after being filtered, if necessary. Each of the above components may be used alone or in combination of two or more.

  Although the viscosity (23 ± 2 ° C.) of the oil-based ink is not particularly limited, for example, when applied by gravure printing, 10 to 1000 mPa · s is preferable, and 20 to 500 mPa · s is more preferable. The viscosity of the oil-based ink can be controlled by the type and blending amount (content) of each of the metal pigment, binder resin, solvent, and other components, a thickener, a thinning agent, and the like.

(When the plastic label of the present invention satisfies the above (2))
When the plastic label of this invention satisfy | fills said (2), the said metal pigment containing printing layer is a printing layer formed with the water-based ink. More specifically, the metal pigment-containing printing layer is obtained by applying the water-based ink to at least one surface of the label base material, and drying (drying solidification) to part or all of the volatile components in the water-based ink. Is removed and formed. Moreover, you may make it harden | cure after apply | coating and drying (dry solidification) as needed.

  As the water-based ink, for example, a water-based ink that forms the transparent printing layer described above and containing a metal pigment can be used.

  The content of the metal pigment in the water-based ink is not particularly limited, but is preferably 5 to 30% by weight, more preferably 10 to 25% by weight based on the total weight (100% by weight) of the nonvolatile components in the water-based ink. %. When the content is 5% by weight or more, the metallic gloss of the plastic label is more excellent and preferable. When the content is 30% by weight or less, the adhesiveness to the label substrate and the transparent printing layer is excellent, which is preferable.

  Although content of the said aqueous resin in the said water-based ink is not specifically limited, 15-70 weight% is preferable with respect to the total weight (100 weight%) of the non-volatile component of water-based ink, More preferably, it is 20-65. % By weight. When the content is 15% by weight or more, the adhesiveness to the label substrate and the transparent printing layer is good, which is preferable.

  Although content of the non-volatile component (for example, aqueous resin, a metal pigment, etc.) in the said water-based ink is not specifically limited, 30 to 70 weight% is preferable with respect to the total weight (100 weight%) of water-based ink.

  Although content of the volatile component (for example, water, alcohol, etc.) in the said water-based ink is not specifically limited, 30 to 70 weight% is preferable with respect to the total weight (100 weight%) of water-based ink.

  The water-based ink may contain components (additives) other than the metal pigment, the water-based resin, water, and alcohol as long as the effects of the present invention are not impaired. Although it does not specifically limit as said additive, The additive etc. which were illustrated and demonstrated as an additive which may be contained in the water-based ink which forms the above-mentioned transparent printing layer are mentioned. Only 1 type may be used for the said additive and 2 or more types may be used for it.

  The water-based ink is produced, for example, by mixing the metal pigment, the water-based resin, water, alcohol, and other additives as necessary. The mixing can be performed by a known or conventional mixing method, and is not particularly limited. For example, a mixing device illustrated and described as a mixing device for the water-based ink for forming the above-described transparent printing layer can be used. The mixing time (retention time) during mixing is not particularly limited, but is preferably 10 to 120 minutes. The obtained water-based ink may be used after being filtered, if necessary. Each of the above components may be used alone or in combination of two or more.

  The viscosity (23 ± 2 ° C.) of the water-based ink is not particularly limited, but is preferably 10 to 1000 mPa · s, more preferably 20 to 500 mPa · s, for example, when applied by gravure printing. The viscosity of the water-based ink can be controlled by the types and blending amounts (contents) of the metal pigment, the water-based resin, water, alcohol, and other components, the thickener, the thickener, and the like.

(When the plastic label of the present invention satisfies the above (3))
When the plastic label of this invention satisfy | fills said (3), the said metal pigment containing printing layer is a printing layer formed with oil-based ink or water-based ink. Examples of the oil-based ink include oil-based ink described in the case where the above-described plastic label of the present invention satisfies the above (1). In addition, the preferable aspect of the said oil-based ink is also the same as the preferable aspect of the oil-based ink demonstrated in the case where the plastic label of the above-mentioned this invention satisfy | fills said (1). Moreover, as said water-based ink, the water-based ink etc. which were demonstrated when the above-mentioned plastic label of this invention satisfy | fills said (2) are mentioned. In addition, the preferable aspect of the said water-based ink is also the same as the preferable aspect of the water-based ink demonstrated in the case where the plastic label of the above-mentioned this invention satisfy | fills said (2).

(When the plastic label of the present invention satisfies the above (4))
When the plastic label of this invention satisfy | fills said (4), the said metal pigment containing printing layer is a printing layer formed by hardening | curing a curable composition layer. The curable composition layer is a curable composition layer, which is formed by applying a curable ink and drying or solidifying as necessary. Examples of the method for curing the curable composition layer include curing by irradiation with active energy rays, thermal curing, two-component reactive curing, and moisture curing. Examples of the curable composition layer include an active energy ray curable composition layer, a thermosetting composition layer, a two-component reaction curable composition layer, and a moisture curable composition layer.

  Although it does not specifically limit as an active energy ray which hardens the said active energy ray curable composition layer, For example, visible light, an ultraviolet-ray, an electron beam etc. are mentioned. That is, the active energy ray curable composition layer is preferably an ultraviolet curable composition layer or an electron beam curable composition layer.

  As said curable ink, what contained the metallic pigment in the curable ink which forms the above-mentioned transparent printing layer, for example can be used.

[Label substrate]
The label base material in the plastic label of the present invention is a plastic film. The plastic film serves as a support for the transparent printing layer and the metal pigment-containing printing layer, and is not particularly limited. For example, the plastic film mainly affects physical properties such as strength, rigidity and shrinkage properties of the plastic label of the present invention. . The type of the label substrate can be appropriately selected according to the type of the plastic label and is not particularly limited. For example, when the plastic label of the present invention is a shrink label (heat-shrinkable label). The plastic film is a shrink film (heat-shrinkable film). When the plastic label of the present invention is a stretch label, the plastic film is a stretch film, and the plastic label of the present invention is a tack label or a roll label. In the case of an in-mold label, it is a non-shrinkable film. Among these, the label base material is preferably a shrink film.

  The type of resin forming the plastic film can be appropriately selected according to the required physical properties, application, cost, etc., and is not particularly limited. For example, polyester resin, polyolefin resin (for example, polyethylene resin) Resin, polypropylene resin, etc.), polystyrene resin, polyvinyl chloride resin, polyamide resin and the like. Only 1 type may be used for the said resin and 2 or more types may be used for it. Furthermore, the same kind or different kinds of resins may be laminated to be used as a laminated film. Especially, when a label base material is a shrink film, polyester-type resin, polyolefin-type resin, and polystyrene-type resin are preferable. Moreover, when a label base material is a stretch film, polyolefin-type resin is preferable, More preferably, it is polyethylene-type resin. When the label substrate is a non-shrinkable film, a polyester resin or a polyolefin resin is preferable, and a PET resin or a polypropylene resin is more preferable. Examples of the polyester-based resin, the polyolefin-based resin, and the polystyrene-based resin include, for example, JP 2008-170822 A, JP 2008-170697 A, JP 2008-163215 A, and JP 2008-163231 A. And polyester resins, polyolefin resins, polystyrene resins and the like.

  Examples of the polyester resin used for the polyester film include polyethylene terephthalate (PET) resin, poly (ethylene-2,6-naphthalenedicarboxylate) (PEN), and polylactic acid (PLA). Among them, polyethylene terephthalate (PET) resin is preferable. As the PET resin, polyethylene terephthalate (PET) using terephthalic acid as the dicarboxylic acid component and ethylene glycol as the diol component; terephthalic acid as the dicarboxylic acid component, ethylene glycol as the diol component, Copolyester (CHDM copolymerized PET) using 4-cyclohexanedimethanol (CHDM) as a copolymerization component, terephthalic acid as a dicarboxylic acid component, ethylene glycol as a main component as a diol component, neopentyl glycol (NPG) as a main component Copolyester (NPG copolymerized PET) used as copolymer component, terephthalic acid as dicarboxylic acid component, ethylene glycol as main component as diol component, diethylene glycol as copolymer component Diol-modified PET such as copolyester; dicarboxylic acid such as copolyester using terephthalic acid as the main component, isophthalic acid and / or adipic acid as the co-polymerization component, and ethylene glycol as the diol component Examples thereof include modified PET.

  As a polystyrene-type resin used for the said polystyrene-type film, as a constituent monomer, for example, styrene, α-methylstyrene, m-methylstyrene, p-methylstyrene, p-ethylstyrene, p-isobutylstyrene, pt- Examples thereof include resins containing one or more styrene monomers such as butyl styrene and chloromethyl styrene. Specifically, for example, general-purpose polystyrene (GPPS), styrene-butadiene copolymer (for example, SBS), styrene-butadiene-isoprene copolymer (SBIS), styrene-acrylic acid ester copolymer and the like can be mentioned. .

  Polyolefin resins used for the polyolefin film include polyethylene resins such as low density polyethylene (LDPE), linear low density polyethylene (LLDPE), metallocene catalyst LLDPE (mLLDPE), and ethylene-vinyl acetate copolymer. Polypropylene resins such as polypropylene and propylene-α-olefin copolymers; cyclic olefin resins and the like. In particular, the polyolefin film when the label substrate is a shrink film is preferably one having a cyclic olefin resin as an outer layer, for example, a cyclic olefin resin as an outer layer and a polyethylene resin or a polypropylene resin as an inner layer (center layer). ) Is preferred.

  The plastic film may have a single-layer structure or a laminated structure. That is, the plastic film may be a single-layer film or a laminated film in which a plurality of film layers are laminated according to required physical properties, applications, and the like. In the case of a laminated film, film layers made of the same kind of resin may be laminated, or film layers made of different resins may be laminated. As the laminated film when the plastic film is a shrink film, a polyester film as an outer layer, a laminated film having a polyolefin resin or polystyrene resin as an inner layer, a polystyrene resin as an outer layer, and a polyolefin resin or outer layer A laminated film having a polystyrene resin having a different composition as an inner layer, and a laminated film having a cyclic olefin resin as an outer layer and a polyethylene resin or a polypropylene resin as an inner layer are preferable.

  The plastic film may be a non-oriented film or an oriented film. In particular, in the case where the plastic film is a shrink film, a film oriented in at least one direction (for example, a film oriented in one direction, one direction, and the one direction) from the viewpoint of exhibiting shrink characteristics (heat shrinkage characteristics). Preferably, the film is oriented in a direction different from the direction. When the shrink film is a laminated film, it is preferable that at least one film layer in the laminated film is oriented. As the shrink film, in particular, a film oriented in one direction (uniaxially oriented film) or a film oriented in one direction and a direction orthogonal to the one direction (biaxially oriented film) is often used. In general, a uniaxially oriented film (including a film mainly stretched in one direction and slightly stretched in a direction orthogonal to the one direction) is generally used. When the plastic film is a stretch film, it may be a non-oriented film, but may be slightly oriented (for example, oriented by stretching less than 1.5 times). When the plastic film is a non-shrinkable film, it may be a non-oriented film, slightly oriented (for example, oriented by stretching less than 1.5 times), or a biaxially oriented film. Although a biaxially oriented film may be used most commonly.

  The film oriented in at least one direction can be obtained by stretching an unstretched film in at least one direction. For example, when the film oriented in at least one direction is a uniaxially oriented film, it is obtained by stretching an unstretched film in one direction. When it is a biaxially oriented film, the unstretched film is oriented in one direction and the one direction. It is obtained by stretching in a direction orthogonal to the direction.

  The plastic film can be produced by a conventional method such as melt film formation or solution film formation. It is also possible to use a commercially available plastic film. The surface of the plastic film may be subjected to conventional surface treatment such as corona discharge treatment or primer treatment, if necessary. When producing a laminated plastic film, a conventional method such as a co-extrusion method or a dry laminating method can be used as a laminating method. As a method for orienting the plastic film, biaxial stretching in the longitudinal direction (film production line direction, also referred to as MD direction) and the width direction (direction orthogonal to the longitudinal direction, also referred to as TD direction), the longitudinal direction, or the width direction These uniaxial stretching methods can be used. As the stretching method, for example, a roll method, a tenter method, a tube method, or the like can be used. For example, the stretching treatment of the film substantially uniaxially stretched in the width direction is, for example, 1.01 to 1.5 times, preferably 1.05 in the longitudinal direction at a temperature of about 70 to 100 ° C., if necessary. The film can be stretched by about 3 to 6 times, preferably about 4 to 5.5 times in the width direction after stretching about 1.3 times.

  When the plastic film is a shrink film, the heat shrinkage rate at 90 ° C. for 10 seconds (sometimes referred to as “heat shrinkage rate (90 ° C., 10 seconds)”) in the main shrink direction of the shrink film is particularly limited. Although not, 15 to 90% is preferable, and more preferably 20 to 85%. Although the thermal contraction rate (90 degreeC, 10 second) of the direction orthogonal to the main shrinkage direction of the said shrink film is not specifically limited, -5-10% is preferable. The “main shrinkage direction” is a direction mainly subjected to a stretching process (a direction having the largest thermal shrinkage rate), and is generally a longitudinal direction or a width direction, for example, substantially in the width direction. In the case of a uniaxially stretched film, it is the width direction.

  Moreover, when the said plastic film is a non-shrinkable film, the heat shrink rate (90 degreeC, 10 second) of a plastic film is although it does not specifically limit, It is preferable not to exceed 5% in any direction.

  When the plastic film is a stretch film, the stretch film can be stretched 1.25 times or more in at least one direction, and the strain after stretching 1.25 times is a stretch before stretching 1.25 times. The film length is preferably 10% or less, assuming that the length of the film is 100%. The strain can be measured using, for example, a known or conventional tensile tester. Examples of the tensile tester include “Shimadzu Autograph (AGS-50G: load cell type 500N)” manufactured by Shimadzu Corporation. Note that JIS K 7161 can be referred to for test conditions and the like as necessary.

  The label substrate may be either transparent or opaque. In the case of a label substrate excellent in transparency, the haze value [based on JIS K 7136, converted to a thickness of 40 μm, unit:%] of the label substrate is not particularly limited, but is preferably 10% or less, more preferably. Is 7% or less, more preferably 5% or less. When the haze value exceeds 10%, when used as a back-printed plastic label, the printing may become cloudy and the decorativeness may deteriorate when used as a product. However, even when the haze value exceeds 10%, when used as a front printed plastic label, it may be opaque and can be used sufficiently. The label base material excellent in transparency is preferably colorless, but may be colored as long as transparency is not impaired. The opaque label substrate is not particularly limited, and for example, a milky white film or the like can be used. In this specification, “back printed plastic label” means a plastic label having a printed layer containing a metal pigment on the inner side of the label substrate (the side that becomes the adherend when the plastic label is attached to the adherend). Say. On the other hand, the “front printed plastic label” refers to a plastic label having a metal pigment-containing printed layer on the outside of the label substrate (the side opposite to the adherend side when the plastic label is attached to the adherend). .

  Although the thickness of the said label base material is not specifically limited, 10-100 micrometers is preferable, More preferably, it is 12-80 micrometers, More preferably, it is 15-60 micrometers.

  A commercial item can also be used for the label substrate. Examples of the shrink film include “Space Clean S7042” and “SV-808” manufactured by Toyobo Co., Ltd., “LX-10S” and “LX-61S” manufactured by Mitsubishi Plastics, Inc. (polyester film); “Bonset” manufactured by Kasei Co., Ltd. “GMLS” manufactured by Gunze Co., Ltd. (polystyrene film); “FL” manufactured by Gunze Co., Ltd. (polyolefin film); “Ecology” manufactured by Mitsubishi Plastics Co., Ltd. ( Polylactic acid film); “DL” manufactured by Mitsubishi Plastics, Inc. “HGS” manufactured by Gunze Co., Ltd. (a laminated film having a polyester resin as a surface layer and a polystyrene resin as a central layer). Examples of the stretch film include “Suzuron L” manufactured by Aicello Chemical Co., Ltd. Examples of the non-shrinkable film include “OP” and “FOS” manufactured by Mitsui Chemicals Tosero Co., Ltd., “Trephan” manufactured by Toray Industries, Inc. (hereinafter referred to as biaxially stretched polypropylene film), and the like.

[Other layers]
The other layers (layers other than the transparent printing layer and the metal pigment-containing printing layer) are not particularly limited, but other printing layers (printing layers other than the transparent printing layer and the metal pigment-containing printing layer), adhesion Agent layer (pressure-sensitive adhesive layer, heat-sensitive adhesive layer, etc.), protective layer, anchor coat layer, primer coat layer, coating layer, inner coat layer, antistatic layer, metal or metal oxide deposition layer, light shielding layer , A heat insulating layer, a barrier layer, and the like.

  The other print layer is not particularly limited, and examples thereof include known print layers used in plastic labels. In addition, as the other print layer, for example, a design print layer (color print layer or the like) such as a product name, an illustration, a handling precaution or the like, a background print layer formed in a single color such as white, Examples thereof include a protective printing layer provided for protecting the film and the printing layer, and a primer printing layer provided for improving the adhesion between the label substrate and various printing layers. Although the said other printed layer is not specifically limited, You may be provided only in the single side | surface side of the said label base material, and may be provided in the both surfaces side of the said label base material. Moreover, you may be provided in the side by which the said transparent printing layer and the said metal pigment containing printing layer of the said label base material are provided, and the said transparent printing layer and the said metal pigment containing printing layer are provided. It may be provided on the side opposite to the side. The other printed layer may be provided on the entire surface of at least one surface (the surface on which the other printed layer is provided) of the label base material, or may be provided partially. Good. Further, the other printed layer is not particularly limited, but may be a single layer or a multilayer.

  The other printed layer is not particularly limited, but preferably contains a binder resin as an essential component. Furthermore, it is preferable to include colored pigments such as blue, red, yellow, black, and white as necessary. Each of the binder resin and the color pigment may be used alone or in combination of two or more.

  The binder resin (that is, the binder resin contained in the other printing layer) is not particularly limited, and for example, a resin used as a binder resin in a known printing layer or printing ink can be used. As said binder resin, resin etc. which were illustrated and demonstrated as binder resin contained in the oil-based ink which forms the said transparent printing layer are mentioned, for example. The color pigment is not particularly limited, and for example, a color pigment used in a known printing layer or printing ink can be used.

  Although the thickness of said other printing layer is not specifically limited, For example, 0.1-10 micrometers is preferable, More preferably, it is 0.3-5 micrometers.

[Plastic label of the present invention]
The plastic label of the present invention has a transparent printing layer and a metal pigment-containing printing layer on at least one surface of a label substrate. That is, it has a transparent printing layer and a metal pigment containing printing layer on at least one side of the label substrate. The transparent printing layer and the metal pigment-containing printing layer are provided adjacent to each other. Here, in the plastic label of the present invention, it is sufficient that at least the transparent printing layer and the metal pigment-containing printing layer are adjacent to each other, and the transparent printing layer and the metal pigment-containing printing layer are adjacent to each other on the entire surface. You don't have to. The transparent printing layer and the metal pigment-containing printing layer may be provided on the label base material via the other layer, or may be provided without the other layer.

  The plastic label of the present invention may have a configuration in which a label substrate, a transparent printing layer, and a metal pigment-containing printing layer are provided in this order, and a label substrate, a metal pigment-containing printing layer, and a transparent printing layer. May be provided in this order. When the plastic label of the present invention has the former configuration, it can be preferably used as a back printed plastic label. Moreover, when the plastic label of this invention has the latter structure, it can be preferably used as a surface printing plastic label. In the front printed plastic label and the back printed plastic label, the design printed layer such as a design may be formed so as to be visible from the outside of the label, or may be formed so as to be visible from the inside of the label. Also good.

  When the plastic label of the present invention is a surface-printed plastic label, the layer structure of the plastic label of the present invention is not particularly limited, but from the outside, [transparent printed layer / printed layer containing metal pigment / label substrate], [design] Printing layer / transparent printing layer / metal pigment-containing printing layer / label substrate], [design printing layer / transparent printing layer / metal pigment-containing printing layer / label substrate / protective printing layer], [protective printing layer / design printing layer] / Transparent printing layer / metal pigment-containing printing layer / label substrate], [protective printing layer / design printing layer / transparent printing layer / metal pigment-containing printing layer / label substrate / protective printing layer] It is done. When the plastic label of the present invention is a back printed plastic label, the layer structure of the plastic label of the present invention is not particularly limited, but from the outside, [label substrate / transparent printed layer / metal pigment containing printed layer], [label Substrate / design printing layer / transparent printing layer / metal pigment-containing printing layer], [protective printing layer / label substrate / design printing layer / transparent printing layer / metal pigment-containing printing layer], [design printing layer / label substrate / Transparent printing layer / metal pigment-containing printing layer], [protective printing layer / design printing layer / label substrate / transparent printing layer / metal pigment-containing printing layer] and the like. In addition, in the said structure, the protective printing layer may be provided in the metal pigment containing printing layer surface used as the outermost surface. The plastic label of the present invention may be a front printed plastic label or a back printed plastic label. Among them, the plastic label of the present invention is particularly useful as a back printed plastic label because it is excellent in metallic gloss and shine of the plastic label even if it is a back printed plastic label.

  Among the above, the plastic label of the present invention preferably satisfies any one of the above (1) to (3) from the viewpoint of further improving the metallic gloss and further improving the brightness of the plastic label. It is more preferable to satisfy at least (3). Furthermore, among the cases where the above (3) is satisfied, the transparent printing layer is a printing layer obtained by curing a curable composition layer formed with a curable oil-based ink, or the transparent printing layer is It is a printing layer formed by curing a curable composition layer, and the case where the metal pigment-containing printing layer is a printing layer formed with oil-based ink is more preferable, and the transparent printing layer is formed with oil-based ink having curability. It is a printing layer obtained by curing the formed curable composition layer, and the case where the metal pigment-containing printing layer is a printing layer formed with oil-based ink is particularly preferable.

  The plastic label of the present invention is not particularly limited, and examples thereof include stretch labels, shrink labels (including stretch shrink labels), in-mold labels, tack labels, roll labels (wrap-type glued labels), thermal labels, and the like. It is done. Among these, a shrink label, a roll label, and a heat sensitive label are preferable, and a shrink label is particularly preferable. When the plastic label of the present invention is a shrink label, it is particularly useful because it is excellent in metallic luster and the plastic label is bright even after shrink processing.

FIG. 1 is a schematic view (partial sectional view) showing an example of the plastic label of the present invention. The plastic label 1 of the present invention shown in FIG. 1 includes a label substrate 2, another printing layer 3, a transparent printing layer 4, a metal pigment-containing printing layer 5, and a protective printing layer 6 in this order. In the plastic label 1 of the present invention, the other printed layer 3 is partially formed on one side of the label substrate 2 to form an arbitrary design. The transparent printing layer 4 includes a part of a region where the other printing layer 3 is formed and a part of a region where the other printing layer 3 is not formed, and is a part on the one surface side of the label substrate 2. Provided. The metal pigment-containing printing layer 5 is partially provided on the surface of the one side of the label substrate 2 adjacent to the transparent printing layer 4 in the region where the transparent printing layer 4 is provided. Moreover, the area | region of the transparent printing layer 4 is wider than the area | region of the metal pigment containing printing layer 5, and the peripheral part of the area | region of the transparent printing layer 4 is the transparent printing layer in which the metal pigment containing printing layer 5 is not provided. Four regions are formed. Further, a protective printing layer 6 is provided on the one surface side of the label substrate 2 so as to cover the other printing layer 3, the transparent printing layer 4, and the metal pigment-containing printing layer 5.
However, the above configuration is an example of the present invention, and the present invention is not limited to this. For example, the peripheral edge may be an area of the transparent printing layer 4 in which the metal pigment-containing printing layer 5 is provided entirely or partially. Moreover, in the plastic label 1 of this invention, the metal pigment containing printing layer 5 which the transparent printing layer 4 does not adjoin may exist.

  The protective print layer may be, for example, a white background print layer containing a white pigment, or a transparent protective print layer containing no colorant. The thickness of the protective printing layer is, for example, 0.1 to 10 μm.

  Although the thickness (total thickness) of the plastic label of this invention is not specifically limited, 10-120 micrometers is preferable, More preferably, it is 15-90 micrometers, More preferably, it is 20-65 micrometers.

  The plastic label of the present invention is, for example, a cylindrical plastic label (for example, a cylindrical shrink label, a cylindrical stretch label, etc.) that is attached to an adherend after sealing both ends with a solvent or an adhesive to form a cylindrical shape. Roll-on shrink-on label (ROSO label) or one end of the label is attached to the adherend with an adhesive or the like, the label is wound around the adherend, and the other end is overlapped on one end to form a cylinder It can be used as a plastic label of a type (winding type shrink label, tack label, heat sensitive label). Hereinafter, the cylindrical plastic label using the plastic label of the present invention may be referred to as “the cylindrical plastic label of the present invention”.

(Cylindrical plastic label)
An example of a cylindrical plastic label which is a preferred embodiment of the plastic label of the present invention will be described with reference to FIGS. The cylindrical plastic label 7 of the present invention shown in FIG. 2 is formed into a cylindrical shape by superimposing the other end on the outside of one end of the plastic label of the present invention, and the inner surface of the other end and the outer surface of the one end are solvent. , A cylindrical body in which a seal portion 8 is formed by bonding with an adhesive or heat seal. When the cylindrical plastic label of the present invention is a cylindrical shrink label, the label base material is at least oriented in the circumferential direction D of the cylindrical plastic label of the present invention, and is heat-shrinkable in that direction. In addition, it is preferable that the label base material is mounted so that the circumferential direction D is the main contraction direction. On the other hand, when the cylindrical plastic label of this invention is a cylindrical stretch label, the said label base material has at least stretch property in the circumferential direction D of a cylindrical stretch label, and can be expanded-contracted in the said direction.

  FIG. 3 is a cross-sectional view taken along the line A-A 'in FIG. Specifically, the plastic label of the present invention is partially transparent in a region excluding a region having a predetermined width from the other end of one surface of the label substrate 2 (the surface on the inner surface side of the cylindrical body). A printing layer 4 is formed, and a metal pigment-containing printing layer 5 is formed adjacent to the transparent printing layer 4 in the region of the transparent printing layer 4. Further, the other printing layer 3 is located between the label base material 2 and the transparent printing layer 4 and between the label base material 2 and the protective printing layer 6 in a region excluding a region having a predetermined width from the other end. Is provided in part. Further, the protective printing layer 6 is provided on substantially the entire surface excluding the region having a predetermined width from the end of the other end. For this reason, in the plastic label of the present invention, another printing layer 3, a transparent printing layer 4, a metal pigment-containing printing layer 5, and a protective printing layer 6 are formed in an area having a predetermined width from the other end. The exposed surface from which the label base material 2 is exposed is formed. In addition, at the end of one end part, the edge part of the label base material 2, the transparent printing layer 4, the metal pigment containing printing layer 5, and the protective printing layer 6 corresponds. Specifically, the cylindrical plastic label 7 of the present invention has an exposed surface formed on the inner surface side of the other end portion of the label base material and an exposed surface formed on the outer surface side of the one end portion with a solvent and an adhesive. It is joined by an agent or a heat seal portion 9.

  In addition, in the cylindrical plastic label 7 shown in FIG.2 and FIG.3, although the joining form (envelope sticking) which joins the inner surface of an other end part and the outer surface of one end part was shown as the seal | sticker part 8, It is not limited, It is the joining form which superimposes the surface of the inner surface side of one end part and the other end part, or the surface of an outer surface side, and joins this overlapping part by heat sealing etc. Also good. Even in this case, it is preferable that the exposed surfaces formed on the inner surface side or the outer surface side are overlapped and joined.

  The plastic label of the present invention has a transparent printing layer and a metal pigment-containing printing layer on at least one surface of a label substrate, and the transparent printing layer and the metal pigment-containing printing layer are provided adjacent to each other. The plastic label of the present invention in which the transparent printing layer and the metal pigment-containing printing layer are provided adjacent to each other is provided on at least one surface of a label substrate, among the transparent printing layer and the metal pigment-containing printing layer. One printing layer is provided, and the other printing layer is provided using the printing ink for forming the other printing layer on the surface of the one printing layer provided. The plastic label of the present invention satisfies at least one of the above (1) to (4). Thereby, when the printing ink which forms said other printing layer is apply | coated on said one printing layer, the surface of said one printing layer provided previously melt | dissolves with the solvent in the said printing ink. Hard to do. For this reason, the unevenness by the solvent of the interface between the transparent printing layer and the metal pigment-containing printing layer is prevented, the interface becomes a flatter interface, and the orientation of the metal pigment in the metal pigment-containing printing layer is maintained. As a result, the metallic gloss is excellent and the plastic label is excellent in brightness.

[Production method and processing method of plastic label of the present invention]
Examples of the manufacturing method and processing method (such as a manufacturing method of a cylindrical plastic label) of the plastic label of the present invention are shown below.

  The method for producing a plastic label of the present invention includes at least a transparent printing layer forming step and a metal pigment-containing printing layer forming step. The method for producing a plastic label of the present invention may further include steps other than the transparent printing layer forming step and the metal pigment-containing printing layer forming step.

  In the plastic label of the present invention, for example, one of the transparent printing layer and the metal pigment-containing printing layer is formed on one surface of the label base material with either one of water-based ink or oil-based ink. And a step of forming the other printing layer of the transparent printing layer or the metal pigment-containing printing layer with the other ink of the water-based ink or the oil-based ink adjacent to the one printing layer. It can manufacture with the manufacturing method of. When the plastic label of the present invention satisfies the above (1) or (2), the plastic label of the present invention is preferably produced by the production method.

  Moreover, the plastic label of the present invention is, for example, a step of curing one of the above-described label base materials to cure the curable composition layer to form one of the transparent printing layer or the metallic pigment-containing printing layer. And a step of forming the other printing layer of the transparent printing layer or the metal pigment-containing printing layer with a water-based ink or an oil-based ink adjacent to the one printing layer, and producing the plastic label Can do. When the plastic label of the present invention satisfies the above (3) or (4), the plastic label of the present invention is preferably produced by the production method.

  Hereinafter, the specific manufacturing method of the plastic label of this invention in case the plastic label of this invention satisfy | fills said (1)-(4), respectively is demonstrated.

(When the plastic label of the present invention satisfies the above (1))
When the plastic label of this invention satisfy | fills said (1), in the manufacturing method of the plastic label of this invention, the order of the said transparent printing layer formation process and the said metal pigment containing printing layer formation process is not specifically limited.

  In the transparent printing layer forming step, the transparent printing layer is formed by applying the water-based ink to at least one surface of the label base material and drying (drying and solidifying). When the water-based ink is a curable water-based ink, the transparent printing layer is coated with the curable water-based ink on at least one surface of the label substrate and dried (dried and solidified). Although it may be formed without forming the curable composition layer and curing the curable composition layer, it is preferably formed by curing the curable composition layer.

  In the metal pigment-containing print layer forming step, the metal pigment-containing print layer is formed by applying the oil-based ink to at least one surface of the label substrate and drying (drying and solidifying). When the oil-based ink is a curable oil-based ink, the metal pigment-containing printing layer is coated with the curable oil-based ink on at least one surface of the label substrate and dried (dried and solidified). It may be formed without forming the curable composition layer and curing the curable composition layer, but is preferably formed by curing the curable composition layer.

  In the method for producing a plastic label of the present invention, when the transparent printed layer forming step and the metal pigment-containing printed layer forming step are performed in this order, the metal printed layer forming step is provided with water-based ink on at least one surface of the label substrate. An oil-based ink is applied on the surface of the obtained transparent printing layer to form a metal pigment-containing printing layer. Moreover, when performing in order of a metal pigment containing printing layer formation process and a transparent printing layer formation process, in the said transparent printing layer formation process, the metal pigment containing printing layer provided with the oil-based ink in the at least one surface of the said label base material. A water-based ink is applied on the surface to form a transparent printing layer.

(When the plastic label of the present invention satisfies the above (2))
When the plastic label of this invention satisfy | fills said (2), in the manufacturing method of the plastic label of this invention, the order of the said transparent printing layer formation process and the said metal pigment containing printing layer formation process is not specifically limited.

  In the transparent printing layer forming step, the transparent printing layer is formed by applying the oil-based ink to at least one surface of the label base material and drying (drying and solidifying). When the oil-based ink is a curable oil-based ink, the transparent printing layer is coated with the curable oil-based ink on at least one surface of the label substrate and dried (dried and solidified). Although it may be formed without forming the curable composition layer and curing the curable composition layer, it is preferably formed by curing the curable composition layer.

  In the metal pigment-containing print layer forming step, the metal pigment-containing print layer is formed by applying the water-based ink to at least one surface of the label base material and drying (drying and solidifying). When the water-based ink is a water-based ink having curability, the metal pigment-containing printing layer is coated with the water-based ink having the curability on at least one surface of the label substrate and dried (dried and solidified). It may be formed without forming the curable composition layer and curing the curable composition layer, but is preferably formed by curing the curable composition layer.

  In the method for producing a plastic label of the present invention, when the transparent printed layer forming step and the metal pigment-containing printed layer forming step are performed in this order, the metal printed layer forming step is provided with oil-based ink on at least one surface of the label substrate. A water-based ink is applied on the surface of the obtained transparent printing layer to form a metal pigment-containing printing layer. Moreover, when performing in order of a metal pigment containing printing layer formation process and a transparent printing layer formation process, in the said transparent printing layer formation process, the metal pigment containing printing layer provided with water-based ink in at least one surface of the said label base material. An oil-based ink is applied on the surface to form a transparent printing layer.

(When the plastic label of the present invention satisfies the above (3))
When the plastic label of this invention satisfy | fills said (3), in the manufacturing method of the plastic label of this invention, it performs in order of a transparent printing layer formation process and a metal pigment containing printing layer formation process. In the transparent printed layer forming step, the transparent printed layer is formed by applying a curable ink to at least one surface of the label base material and drying (drying and solidifying) as necessary to form a curable composition layer. Then, the curable composition layer is formed by curing.

  In the metal pigment-containing print layer forming step, the metal pigment-containing print layer is coated with oil-based ink or water-based ink on the surface of the transparent print layer provided on at least one surface of the label substrate, and dried (dried). It is formed by solidifying. In addition, when the oil-based ink or the water-based ink has curability, the metal pigment-containing printing layer has the oil-based ink having the curability or the water-based ink having the curability on at least one surface of the label base material. The curable composition layer may be formed by applying and drying (drying and solidifying), and the curable composition layer may be formed without curing, but is formed by curing the curable composition layer. It is preferable.

(When the plastic label of the present invention satisfies the above (4))
When the plastic label of this invention satisfy | fills said (4), in the manufacturing method of the plastic label of this invention, it performs in order of a metal pigment containing printing layer formation process and a transparent printing layer formation process.

  In the metal pigment-containing print layer forming step, the metal pigment-containing print layer is a curable composition in which curable ink is applied to at least one surface of the label base material, and dried (dried and solidified) as necessary. It is formed by forming a physical layer and curing the curable composition layer.

  In the transparent printing layer forming step, the transparent printing layer is coated with oil-based ink or water-based ink on the surface of the metal pigment-containing printing layer provided on at least one surface of the label substrate, and dried (dried and solidified). It is formed by doing. In addition, when the oil-based ink or the water-based ink has curability, the transparent printing layer applies the oil-based ink having the curability or the water-based ink having the curability to at least one surface of the label base material, It may be formed by drying (dry solidification) to form a curable composition layer and not curing the curable composition layer, but it is preferably formed by curing the curable composition layer. .

  In the case where the plastic label of the present invention satisfies the above (3) or (4), the curable composition layer is coated with curable ink on at least one surface of the label substrate, and dried as necessary. It is provided by (dry solidification). For example, when the curable ink is an active energy ray curable ink, the curable composition layer is provided by applying the active energy ray curable ink. When the curable ink is a curable oily ink or a curable aqueous ink, the curable composition layer is coated with the curable oily ink or the curable aqueous ink. In addition, some or all of the volatile components in the ink are removed by drying (dry solidification). Above all, the curable composition layer is preferably provided by applying a curable oily ink or a curable aqueous ink and drying (drying and solidifying).

  In the method for producing a plastic label of the present invention, the applied oil-based ink layer, water-based ink layer, or curable ink layer (coating layer) is heated and blown (for example, cold air, normal temperature air, hot air). When drying by, for example, a general heating device or blower that can be dried on the printing device can be preferably used. From the viewpoint of safety and drying efficiency, a hot air heater or the like can be preferably used as the heating device. When the oil-based ink and the water-based ink are curable, it is preferable to cure the layer (curable composition layer) after the coating layer is dried.

  Examples of curing when the plastic label of the present invention satisfies the above (3) or (4) include active energy ray curing, thermal curing, two-component reaction curing, and moisture curing. The said thermosetting can be performed using well-known thru | or usual heating apparatuses, such as a warm air heater, an infrared heater, and a thermostat. Moreover, moisture hardening can be performed using a well-known thru | or usual humidity control apparatus. In the two-component reaction curing, an operation other than mixing the two components is not particularly required, but a heating device or a humidity control device may be used to promote the curing reaction.

The active energy ray in the active energy ray curing is not particularly limited, and examples thereof include visible light, ultraviolet rays, and electron beams. Of these, ultraviolet rays and electron beams are preferable. Specifically, the ultraviolet irradiation can be performed using, for example, an ultraviolet (UV) lamp, an ultraviolet LED, an ultraviolet laser, or the like. The active energy ray to be irradiated varies depending on the composition of the curable ink and the curable composition layer and is not particularly limited. However, from the viewpoint of curability, ultraviolet rays having a wavelength of 200 to 460 nm (near ultraviolet rays) are preferable, and integration is also possible. The amount of light is preferably 50 to 2000 mJ / cm ² .

  In the method for producing a plastic label of the present invention, the transparent printing layer forming step and the metal pigment-containing printing layer forming step may be performed in one line or in two or more lines. In the case where the plastic label of the present invention satisfies the above (3) or (4), as an example performed in one line, for example, one printing layer of a transparent printing layer and a metal pigment-containing printing layer is formed. A curable composition layer obtained by applying a curable ink to be applied and drying (drying and solidifying) as necessary to form the one printed layer, and then forming the other printed layer Are applied, dried (dried and solidified), and cured as necessary to form the other printed layer on a single printing machine. Moreover, when the plastic label of this invention satisfy | fills said (3) or said (4), as an example performed by two or more lines, a transparent printing layer and a metal pigment containing printing layer are used, for example with one printing machine. After applying a curable ink that forms one of the printing layers, and drying (dry solidification) as necessary to obtain a curable composition layer, a curing device (for example, a thermostatic bath, a humidity control device, Aging is performed for a predetermined time in an active energy ray irradiation device or the like) to form one of the above-mentioned printing layers, and then the other printing press is applied with oil-based ink or water-based ink that forms the other printing layer, and is dried (dried and solidified) And curing as necessary to form the other printed layer. In addition, when performed by 1 line, it is preferable that the said curable ink is an active energy ray curable ink from a viewpoint of a cure rate.

  In the method for producing a plastic label of the present invention, the method for applying the oil-based ink, the water-based ink, and the curable ink is not particularly limited, but it is a gravure from the viewpoint of cost, productivity, print decoration, and the like. A printing method, a flexographic printing method, and a letterpress printing method are preferable, and a gravure printing method is particularly preferable.

(Other processes)
Although it does not specifically limit in the manufacturing method of the plastic label of this invention, You may have the process of providing another printing layer, the process of providing a protective layer, etc. as processes (other processes) other than a film preparation process.

  In the step of providing the other printing layer, the printing ink for forming the other printing layer is applied on at least one surface of the label base material, and the printing step for solidifying by drying or the like is performed by one or more. The printed layer is formed. For example, one or a plurality of printing steps can be performed to form a design print layer or the like. In the step of providing the other printing layer, a well-known and commonly used printing method can be used, and among them, a gravure printing method or a flexographic printing method is preferable.

  The printing ink for forming the other printing layer is mixed with, for example, a binder resin (a binder resin that may be contained in the other printing layer), a color pigment, a solvent, and other additives as necessary. It is manufactured by doing. Moreover, only 1 type may be used for each said component (binder resin, a color pigment, a solvent, other additives), and 2 or more types may be used for it.

  As described above, a transparent printing layer and a metal pigment-containing printing layer are formed on a label substrate, and the plastic label of the present invention can be produced. For example, the plastic label of the present invention shown in FIG. 1 is performed in the order of the step of providing another print layer, the step of forming a transparent print layer, the step of forming a metal pigment-containing print layer, and the step of providing a protective layer (protective print layer). Can be produced.

(Method for manufacturing cylindrical plastic labels)
Although the manufacturing method of the cylindrical plastic label of this invention is not specifically limited, For example, it is as follows. After providing the above-mentioned transparent printing layer, the above-mentioned metal pigment-containing printing layer, etc. on a long label substrate, a plurality of the plastic labels of the present invention are arranged in the longitudinal direction (longitudinal direction) by slitting to a predetermined width. Obtain a continuous label body. The long surface of the label is formed so that the width direction (that is, the width direction of the label base material) is the circumferential direction. The surfaces are overlapped to form a cylinder, the overlapped portion is sealed in a band shape with a predetermined width, and both ends are joined, or the long label body has a circumferential direction in the width direction. In this way, the other end portion is overlapped so as to be outside the one end portion and formed into a cylindrical shape, the overlapped portion is sealed in a band shape with a predetermined width, and both end portions are joined, A continuous label body (long cylindrical plastic label) can be obtained. When the plastic label of the present invention is a shrink label, the label base material of the stretch label is used when the plastic label of the present invention is a stretch label so that the main shrinkage direction of the label base material of the shrink label is the circumferential direction. It forms in a cylinder shape so that the width direction may become a circumferential direction. This long cylindrical plastic label is cut in the width direction so that the longitudinal direction has a predetermined length, so that one cylindrical plastic label having a predetermined length in the height direction (the cylindrical plastic label of the present invention) ) Can be obtained.

[Container with label]
Although the plastic label of this invention is not specifically limited, It mounts | wears with containers, such as a container for drinks, and is used as a labeled container. In addition, the plastic label of this invention may be used for adherends other than a container. For example, a labeled container (a labeled container having the cylindrical plastic label of the present invention) can be obtained by mounting the plastic label of the present invention (particularly, a cylindrical plastic label) on the container. Examples of the containers include soft drink bottles such as PET bottles, milk bottles for home delivery, food containers such as seasonings, bottles for alcoholic beverages, pharmaceutical containers, containers for chemical products such as detergents and sprays, and toiletries. Containers, cup noodle containers and the like are included. Although it does not specifically limit as a shape of the said container, For example, various shapes, such as bottle types, such as cylindrical shape and a square shape, and a cup type, are mentioned. The material of the container is not particularly limited, and examples thereof include plastic such as PET, glass, and metal.

  The cylindrical plastic label can be attached to the container by a known or conventional method. For example, for a plastic bottle with a label, the cylindrical plastic label of the present invention formed into a cylindrical shape is supplied to an automatic label mounting apparatus, cut into a required length, and then into a plastic bottle that is normally filled with contents. It can be manufactured by continuously fitting so as to cover almost the entire side surface or a predetermined part of the side surface of the bottle body, and if necessary, heat shrinking by heating.

  When the plastic label of the present invention is a shrink label, specifically, for example, after the tubular shrink label is externally fitted to a predetermined container, the tubular shrink label is thermally contracted by heat treatment and is brought into close contact with the container. (Shrink processing). Examples of the heat treatment method include a method of passing through a hot air tunnel or a steam tunnel, a method of heating with radiant heat such as infrared rays, and the like. In particular, a method of treating with steam at 80 to 100 ° C. (passing through a heating tunnel filled with steam and steam) is preferable. Moreover, 101-140 degreeC dry steam can also be used. Although the said heat processing is not specifically limited, It is preferable to implement in the temperature range from which the temperature of a shrink film will be 85-100 degreeC (especially 90-97 degreeC). The plastic label of the present invention is excellent in metallic luster and excellent in the glossiness of the plastic label even when shrink-processed at a high shrinkage rate, so that it can be used for containers that require high shrinkage. Moreover, the processing time of heat processing has preferable 4 to 20 second from a viewpoint of productivity and economical efficiency.

  On the other hand, when the plastic label of the present invention is a stretch label, specifically, for example, the cylindrical stretch label having a diameter smaller than the minimum diameter of the portion to which the label of the container as the attachment object is attached is applied by an external force. By expanding the outer diameter of the container to be attached to the container and fitting it externally to the container, and then releasing the external force, the cylindrical stretch label is self-contracted to follow and adhere to the container. Can be manufactured.

  EXAMPLES Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.

  Table 1 shows the raw material composition of the printing ink used in the examples and comparative examples, the presence and type of active energy ray irradiation, the evaluation results of the plastic labels produced in the examples and comparative examples, and the like. Indicated.

Example 1
As a label base material, a polyester (PET) film (heat-shrinkable film) (manufactured by Mitsubishi Plastics, trade name “LX-18S”, thickness: 50 μm) was used.
As a printing ink for forming a transparent printing layer, 100 parts by weight of an aqueous gravure ink (manufactured by DIC Graphics, trade name “Fine Wrap WPV Inner Coat Varnish”, nonvolatile content: 20 to 30% by weight) and a curing agent ( A two-component reaction curable aqueous ink obtained by mixing 5 parts by weight of DIC Graphics, trade name “Fine Wrap WPV Curing Agent”, nonvolatile content: 100% by weight) was used.
As the printing ink for forming the metal pigment-containing printing layer, silver ink (manufactured by DIC Graphics, trade name “Fine Wrap DH17 Silver”), which is an oil-based ink, was used.
Using the two-component reaction-curable water-based ink on one side of the label substrate, a table-top gravure printing machine (manufactured by Nissho Gravure Co., Ltd., trade name “GRAVO PROOF MINI”) and a gravure plate (engraving 175 line) Then, coating and drying were performed by gravure printing, and a transparent printing layer formed of water-based ink was formed on the entire surface.
Next, in the state where the curing of the transparent printing layer is incomplete, the above-mentioned silver ink is used on the surface of the above-mentioned label base material having the transparent printing layer, and the above-mentioned table gravure printing machine and gravure plate (engraving 70 lines) are used. Then, it was applied and dried by gravure printing to form a metal pigment-containing printing layer on the entire surface.
Lamination of PET film (thickness: 50 μm) / transparent printing layer (thickness: 1 μm) formed with water-based ink / metal pigment-containing printing layer (thickness: 0.5 μm) formed with oil-based ink as described above A plastic label which is a shrink label having a configuration (a plastic label satisfying the above (1)) was obtained.

Example 2
The label base material and silver ink used in Example 1 were used as the printing ink for forming the label base material and the metal pigment-containing printing layer.
As a printing ink for forming a transparent printing layer, 100 parts by weight of a solution of an active energy ray polymerizable polymer compound (manufactured by Taisei Fine Chemical Co., Ltd., trade name “Acryt 8KX-012C”, nonvolatile content: 40% by weight), and light Active energy ray-curable oil-based ink (active energy ray polymerizable high polymer) obtained by mixing 5 parts by weight of a polymerization initiator (BASF Japan Ltd., trade name “Irgacure 184”, nonvolatile content: 100% by weight) Oily ink containing molecular compounds) was used.
The active energy ray-curable oil-based ink is applied to one side of the label base material by gravure printing using the desktop gravure printing machine and gravure plate (engraving 175 line), and dried to form a curable composition layer. Formed. Subsequently, a conveyor speed of 50 m / min is used for the curable composition layer by using an ultraviolet irradiation device (trade name “LIGHT HAMMER 10” manufactured by Fusion UV Systems Japan Co., Ltd., lamp: H +, output: 80%). Ultraviolet irradiation (UV irradiation) was performed under the conditions described above to cure the curable composition layer to form a transparent printing layer on the entire surface.
Next, the surface of the label substrate on the side having the transparent printing layer is coated with the silver ink by gravure printing using the desktop gravure printing machine and the gravure plate (engraving 70 lines), and dried. A metal pigment-containing printing layer was formed on the substrate.
Transparent printing layer (thickness: 1 μm) / oil-based ink obtained by curing the curable composition layer formed of PET-based film (thickness: 50 μm) / active energy ray-curable oil-based ink as described above Thus, a plastic label (plastic label satisfying the above (3)), which is a shrink label having a laminated structure of a metal pigment-containing printing layer (thickness: 0.5 μm) formed by the above method, was obtained.

Examples 3, 5, and 6
The same as in Example 2 except that the active energy ray-curable oily ink (oil-based ink containing an active energy ray-polymerizable polymer compound) having the composition shown in Table 1 was used as the printing ink for forming the transparent printing layer. And a transparent printing layer (thickness: 1 μm) / oil-based ink obtained by curing a curable composition layer formed of a PET-based film (thickness: 50 μm) / active energy ray-curable oil-based ink. Further, a plastic label (plastic label satisfying the above (3)) which is a shrink label having a laminated structure of metal pigment-containing printing layer (thickness: 0.5 μm) was obtained. In Examples 3 and 6, the trade name “Irgacure 127” (manufactured by BASF Japan Ltd., nonvolatile content: 100 wt%) was used as the photopolymerization initiator. In Examples 5 and 6, a trade name “Acryt 8KX-077” (manufactured by Taisei Fine Chemical Co., Ltd., nonvolatile content: 40% by weight) was used as the solution of the active energy ray polymerizable polymer compound.

Example 4
The label base material and silver ink used in Example 1 were used as the printing ink for forming the label base material and the metal pigment-containing printing layer.
As a printing ink for forming a transparent printing layer, consisting of 100 parts by weight of an active energy ray polymerizable polymer solution (manufactured by Taisei Fine Chemical Co., Ltd., trade name “Acryt 8KX-012C”, nonvolatile content: 40% by weight), An active energy ray-curable oil-based ink (oil-based ink containing an active energy ray-polymerizable polymer compound) was used.
The active energy ray-curable oil-based ink is applied to one side of the label base material by gravure printing using the desktop gravure printing machine and gravure plate (engraving 175 line), and dried to form a curable composition layer. Formed. Subsequently, a conveyor speed of 30 m / min is used for the curable composition layer by using an electron beam irradiation apparatus (trade name “EBC-200” manufactured by NHV Corporation, voltage: 150 kV, electron beam density: 10 kGy). Electron beam irradiation (EB irradiation) was performed under the above conditions to cure the curable composition layer to form a transparent printing layer on the entire surface.
Next, the surface of the label substrate on the side having the transparent printing layer is coated with the silver ink by gravure printing using the desktop gravure printing machine and the gravure plate (engraving 70 lines), and dried. A metal pigment-containing printing layer was formed on the substrate.
Transparent printing layer (thickness: 1 μm) / oil-based ink obtained by curing the curable composition layer formed of PET-based film (thickness: 50 μm) / active energy ray-curable oil-based ink as described above Thus, a plastic label (plastic label satisfying the above (3)), which is a shrink label having a laminated structure of a metal pigment-containing printing layer (thickness: 0.5 μm) formed by the above method, was obtained.

Example 7
Example 4 except that an active energy ray-curable oil-based ink (oil-based ink containing an active energy ray-polymerizable polymer compound) having the composition shown in Table 1 was used as the printing ink for forming the transparent printing layer. Similarly, a transparent printing layer (thickness: 1 μm) / oil-based ink obtained by curing a curable composition layer formed of a PET film (thickness: 50 μm) / active energy ray-curable oil-based ink Thus, a plastic label (plastic label satisfying the above (3)) which is a shrink label having a laminated structure of the printed layer containing metal pigment (thickness: 0.5 μm) was obtained.

Comparative Example 1
Except that the curable composition layer formed by applying and drying an oil-based ink having active energy ray curability on one side of the label substrate is not irradiated with an electron beam, and the curable composition layer is a transparent printing layer. In the same manner as in Example 2, PET-based film (thickness: 50 μm) / transparent printing layer formed with oil-based ink (thickness: 1 μm) / metal pigment-containing printing layer formed with oil-based ink (thickness: 0. A plastic label which is a shrink label having a laminated structure of 5 μm) was obtained.

Comparative Examples 2 and 3
As a printing ink for forming the transparent printing layer, it is formed of a PET film (thickness: 50 μm) / oil-based ink in the same manner as in Comparative Example 1 except that a resin solution having the composition shown in Table 1 is used as the oil-based ink. A plastic label which is a shrink label having a laminated structure of a transparent printing layer (thickness: 1 μm) / metal pigment-containing printing layer (thickness: 0.5 μm) formed of oil-based ink was obtained. In Comparative Example 2, as a resin solution, acrylic resin (Mitsubishi Rayon Co., Ltd., trade name “Dyanal BR-105”, nonvolatile content: 100% by weight) 40 parts by weight, ethyl acetate and propyl acetate A solution (non-volatile content: 40% by weight) obtained by mixing 60 parts by weight of a mixed solvent (1: 1 by weight) was used. In Comparative Example 3, a urethane resin solution (manufactured by Sanyo Chemical Industries, trade name “Samprene IB-129”, nonvolatile content: 40% by weight) was used as the resin solution.

(Evaluation)
The following evaluation was performed about the plastic label obtained by the Example and the comparative example. The evaluation results are shown in Table 1.

Metal gloss (mirror gloss)
The plastic labels obtained in Examples and Comparative Examples were made incident on a gloss meter “micro-TRI-gloss” manufactured by BYK-Gardner in accordance with JIS K 5600-4-7. The specular glossiness (before heat shrinkage) was measured under the conditions of angle 60 ° / reflection angle 60 °. In addition, it measured using the label base-material surface as a measurement surface. Metal gloss was evaluated according to the following criteria.
Good (O): Specular gloss is 150 or more Poor (X): Specular gloss is less than 150

  As can be seen from Table 1, the plastic labels (Examples 1 to 7) of the present invention had a high specular gloss on the surface of the label substrate and were excellent in metal gloss. On the other hand, the plastic labels (Comparative Examples 1 to 3) that do not satisfy any of the above (1) to (4) had low specular gloss on the surface of the label base material and poor metal gloss.

DESCRIPTION OF SYMBOLS 1 Plastic label of this invention 2 Label base material 3 Other printing layers 4 Transparent printing layer 5 Metal pigment containing printing layer 6 Protective printing layer 7 Cylindrical plastic label of this invention 8 Seal part 9 Solvent, adhesive agent, or heat seal part

Claims (3)

A plastic label having a transparent printing layer and a metal pigment-containing printing layer on at least one surface of a label substrate,
The plastic label, wherein the transparent printing layer and the metal pigment-containing printing layer are provided adjacent to each other and satisfy at least one of the following (1) to (4).
(1) The transparent printing layer is a printing layer formed with water-based ink, and the metal pigment-containing printing layer is a printing layer formed with oil-based ink. (2) The transparent printing layer is formed with oil-based ink. (3) The label base material, the transparent printing layer, and the metal pigment-containing printing layer are formed in this order, and the transparent layer is a transparent printing layer. The printing layer is a printing layer formed by curing a curable composition layer, and the metal pigment-containing printing layer is a printing layer formed with oil-based ink or water-based ink. (4) The label base material and the metal A pigment-containing printing layer and the transparent printing layer are formed in this order, the metal pigment-containing printing layer is a printing layer formed by curing a curable composition layer, and the transparent printing layer is an oil-based ink or water-based Is a printed layer formed by Nki A method for producing a plastic label having a transparent printing layer and a metal pigment-containing printing layer on at least one surface of a label substrate,
On one side of the label substrate, a step of forming one of the transparent printing layer or the metallic pigment-containing printing layer with any one of water-based ink or oil-based ink, and
Adjacent to the one printing layer, forming the other printing layer of the transparent printing layer or the metal pigment-containing printing layer with the other ink of the water-based ink or oil-based ink,
A method for producing a plastic label comprising: A method for producing a plastic label having a transparent printing layer and a metal pigment-containing printing layer on at least one surface of a label substrate,
A step of curing the curable composition layer on one surface of the label base material to form one of the transparent printing layer or the metal pigment-containing printing layer;
Adjacent to the one printing layer, forming the other printing layer of the transparent printing layer or the metal pigment-containing printing layer with water-based ink or oil-based ink,
A method for producing a plastic label comprising:

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