JP2019099252A - Packaging material, packaging container and lid body - Google Patents

Abstract

To provide a packaging material that has a pattern printed reversely and that enhances decoration effect of the pattern, and a packaging container and a lid body using the same.SOLUTION: The present invention relates to: a packaging material 1 configured to have at least a transparent mat layer 2, a transparent base material 3, a pattern printing layer 4, and a ground-color printing layer 5 laminated in this order from an outer layer side, the packaging material having at least, at a part of an outer layer-side surface of a region having a pattern formed with the pattern printing layer 4, (a) a clear layer 6 laminated on an outer surface-side surface of the transparent mat layer 2 or (b) a non-lamination part of the transparent mat layer 2; and a packaging container and a lid body using the packaging material 1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging material, a packaging container and a lid using the same.

In plastic packaging materials to be decorated by pattern printing, a pattern printing layer is formed on the outer layer side of the substrate, so-called front-printed ones, and a pattern printing layer is formed on the inner layer side of the transparent substrate There is what is called reverse printing.
In the case of surface printing, printing can be performed on any substrate, and the appearance as printed image can be easily obtained. On the other hand, there is a disadvantage that the pattern printing is easily scratched or peeled off due to impact or friction to the outer surface of the packaging material.

  On the other hand, back printing is printed on the inner layer side (back side) of the transparent substrate, so it is said that scratching and peeling of pattern printing are unlikely to occur even if there is an impact or friction on the outer surface of the packaging material. It has an advantage. Moreover, since the design by back printing is visually recognized from the outer surface of a packaging material through a transparent base material as it describes, for example in patent document 1, it is smooth | blunted by the transparent base material at the viewer side, Sex is given and a high-class feeling is obtained.

  Also, in order to adjust the gloss of the back-printed packaging material to enhance the decorative effect, it has been conventionally practiced to form a transparent mat layer on the surface of the transparent substrate on the outer layer side.

JP, 2017-81589, A

  However, when the matte layer is formed on the entire surface of the transparent substrate surface, the entire pattern may be matted to give an impression of lack of luxury. In addition, since the entire pattern is viewed through the mat layer, the decorative effect of the pattern is weakened, and the impact by the contrast of the gloss of the pattern is also lost.

  The present invention has been made to solve the above-mentioned problems, and provides a packaging material in which the decorative effect of the design is further enhanced in the packaging material of the reverse printing, and a packaging container and a lid using the same. With the goal.

  The present invention is based on the finding that the decorative effect can be further enhanced by generating a sense of gloss in a partial area of a pattern and suppressing a sense of gloss in another area to produce a matte feeling. It is a thing.

That is, the present invention provides the following [1] to [3].
[1] The outer layer in a region where at least a transparent mat layer, a transparent substrate, a pattern print layer and a ground color print layer are laminated in this order from the outer layer side, and a pattern is formed by the pattern print layer The packaging material which has a structure of at least any one of following (a) and (b) in a part of surface of the side.
(A) clear layer laminated on the outer layer side surface of the transparent mat layer (b) at least a part of the unlaminated portion [2] of the transparent mat layer is formed of the packaging material described in the above [1] Packaging container.
[3] A lid joined to the container body so as to seal the container of the container body, the lid being formed of the packaging material according to the above [1].

  According to the present invention, it is possible to provide a packaging material in which the decorative effect of the design is enhanced, in the packaging material having the back-printed design. Moreover, the packaging container and lid which were excellent in the designability can be provided using the said packaging material.

It is a schematic sectional drawing which shows an example of the laminated structure of the packaging material of this invention. It is a schematic sectional drawing which shows another example of the laminated structure of the packaging material of this invention.

  Hereinafter, the packaging material of the present invention, and a packaging container and a lid using the packaging material will be described in detail with reference to the drawings. In addition, the notation of the numerical range with "AA-BB" in this specification means that it is "AA or more and BB or less."

[Packaging material]
In FIG. 1, the outline of the lamination structure of the thickness direction in one aspect of the packaging material of this invention is shown. Moreover, in FIG. 2, the outline of the laminated structure of the thickness direction in the other one aspect | mode of the packaging material of this invention is shown. In these figures, the upper side is the outer layer side (surface side), and the lower side is the inner layer side (back side). As shown in FIGS. 1 and 2, in the packaging material 1 of the present invention, at least a transparent mat layer 2, a transparent substrate 3, a pattern print layer 4 and a ground color print layer 5 are laminated in this order from the outer layer side. It has a configuration. And it is characterized by having at least one composition of the following (a) and (b) in a part of surface of the above-mentioned outer layer side of a field where a picture is formed by picture printing layer 4.
(A) Clear layer 6 laminated on the outer layer side surface of the transparent mat layer 2
(B) Unlaminated part of the transparent mat layer 2

  According to such a packaging material, the decoration effect by the pattern of the back printing can be enhanced. The above configurations (a) and (b) may have only one or both in one packaging material.

  In the laminated structure, the transparent mat layer 2, the transparent base 3, the pattern print layer 4 and the ground color print layer 5 may be laminated in this order from the outer layer side, and other layers may be included as constituent layers. It may be In the packaging material 1 shown in FIG. 1 and FIG. 2, an intermediate layer 7 and a sealant layer 8 are laminated in this order from the outer layer side as other constituent layers on the inner layer side (back side) of the ground color printing layer 5. Is equipped.

In the packaging material 1 shown in FIG. 1, the design print layer 4 is formed on a part of the back surface of the transparent substrate 3, and the ground color print layer 5 is formed on the back surface of the design print layer 4 over the entire surface of the transparent substrate 3. It is done. Such a layer configuration can be obtained by sequentially forming a pattern printing layer 4 and a ground color printing layer 5 on the transparent substrate 3 by reverse printing.
A transparent mat layer 2 is formed on the entire surface of the transparent substrate 3 on the surface of the transparent substrate 3. On the surface of the transparent mat layer 2, a clear layer 6 is formed in a part of the area where the design is formed by the design printing layer 4. That is, FIG. 1 shows a packaging material 1 having the configuration of (a) above. FIG. 1 shows an example in which the pattern print layer 4 has a chromatic color layer 4a and a glitter print layer 4b and is configured to enhance the gloss of the glitter print layer 4b.
Thus, the clear layer 6 is formed in the area corresponding to the pattern of a part of the pattern print layer 4 so that the pattern of the area has a high gloss and is compared with the pattern of the other area. It can be viewed as emphasized.

In the packaging material 1 shown in FIG. 2, the pattern print layer 4 is formed on a part of the back surface of the transparent substrate 3, and the ground color print layer 5 is formed on the entire surface of the transparent substrate 3 on the back surface side of the pattern print layer 4. The configuration that is performed, that is, the layer configuration on the inner layer side from the transparent substrate 3 is the same as that in FIG. 1.
On the surface of the transparent substrate 3, the transparent mat layer 2 is formed in an area excluding a part of the area where the design is formed by the design printing layer 4. That is, FIG. 2 has shown the packaging material 1 which has a structure of said (b). FIG. 2 shows an example in which the design print layer 4 has the chromatic color layer 4a and the glitter print layer 4b and is configured to enhance the gloss of the glitter print layer 4b.
Thus, by having the unlaminated portion of the transparent mat layer 2 in the area corresponding to the pattern of the pattern printing layer 4, the pattern of the area is the gloss of the pattern visually recognized through the transparent substrate 3. It can be viewed as being emphasized as compared with the pattern in the other area without impairing the feeling.

(Transparent substrate)
The transparent substrate 3 is a substrate of the packaging material 1 and is a printing substrate when the picture printing layer 4 is reverse printed. The transparent substrate 3 is made of a light transmitting material so that the design printing layer 4 can be viewed from the outer layer side. The transparent substrate 3 preferably has a total light transmittance of 85% or more, more preferably 90% or more according to JIS K7361-1: 1997. Moreover, it is preferable that the haze of JISK7136: 2000 is 1.0% or less, More preferably, it is 0.5% or less, More preferably, it is 0.3% or less.
The thickness of the transparent substrate 3 is not particularly limited and can be appropriately set depending on the application of the packaging material 1, but generally, it is preferably about 5 to 50 μm, and more preferably 8 to 40 μm. More preferably, it is 10-25 micrometers.

As a constituent material of the transparent base material 3, a plastic film, cellophane, transparent paper etc. are mentioned, for example. In general, a plastic film is preferably used.
Specific examples of plastic film materials include polyolefin resins such as polyethylene (PE) and polypropylene (PP), cyclic polyolefin resins, polystyrene resins, acrylonitrile-styrene copolymer (AS) resins, acrylonitrile -Butadiene-Styrene copolymer (ABS) resin, poly (meth) acrylic resin, polycarbonate resin, polyvinyl alcohol resin, ethylene-vinyl alcohol copolymer (EVOH), ethylene-vinyl ester copolymer saponified product, Polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), polyamide resins such as various nylons (Ny), polyurethane resins, acetal resins, cells Over scan resins, polyvinylidene chloride resin (PVDC) and the like. Among these, polyolefin resins are preferable from the viewpoint of versatility, and polyester resins and polyamide resins are preferable from the viewpoint of heat resistance, strength and the like.
The plastic film may be uniaxially or biaxially stretched. Moreover, the composite film on which the film of 2 or more types of resin of the above was laminated | stacked may be sufficient. Also, the plastic film may be formed by an inflation method or, alternatively, a melt extrusion coating method.

When the packaging material is used for a microwave oven or a retort container, it is preferable that the plastic film be excellent in heat resistance. As resin which comprises the plastic film excellent in heat resistance, polyester system resin, polyamide system resin, etc. are mentioned.
Specific examples of plastic films of packaging materials for microwave ovens and retort containers include single films of polyester films, single films of polyamide films such as nylon, and composite films including one or more of polyester films and polyamide films. As an example of the composite film, a co-extrusion stretched film composed of PET / Ny / PET and PET / Ny from the outer layer side can be mentioned. Moreover, as said composite film, it is also preferable to combine any one or more types of a polyester film and a polyamide film, and any one or more types of an ethylene-vinyl alcohol copolymer film and a polyvinylidene chloride film.

(Pattern print layer)
The picture print layer 4 is formed on the back surface of the transparent substrate 3. The picture print layer 4 is a broad concept including, for example, characters, figures, symbols, patterns, patterns and the like. The pattern print layer 4 may be formed by front printing on the surface of another base material layer, sealant layer or the like and then bonded to the back surface of the transparent substrate 3 with an adhesive, but the outer layer may be used. From the viewpoint of making it possible to visually recognize the design more sharply from the side, it is preferable that the transparent substrate 3 is formed by reverse printing. The picture print layer 4 may be composed of one layer or may be composed of two or more layers.
Although the total thickness of the pattern printing layer 4 is not particularly limited, it is usually preferably about 1 to 10 μm, more preferably 1.5 to 5 μm. Further, the picture print layer 4 may be full surface printing or partial printing on the transparent substrate 3.

When the picture print layer is formed on the outer layer side (surface) of the transparent substrate by surface printing, when a transparent mat layer is formed on the surface of the picture print layer, the surface shape of the transparent mat layer is the same as that of the transparent mat layer. It becomes easy to follow the surface shape of the lower layer picture print layer. For this reason, the surface shape of the transparent mat layer tends to be uneven under the influence of the surface unevenness of the pattern printing layer, causing unevenness in the degree of matting of the pattern, reducing the decorative effect and impairing the sense of luxury It will be. Further, in this case, even if the clear layer is formed on the pattern of the pattern print layer, the light transmitted through the clear layer is diffusely reflected by the surface irregularities of the pattern print layer, and therefore the gloss can not be sufficiently improved.
On the other hand, when a pattern is provided on the inner layer side (rear surface) of the transparent substrate 3, the transparent mat layer 2 is formed on the outer layer side of the transparent substrate 3 without the pattern printing layer 4 interposed. Therefore, the pattern visually recognized from the outer layer side is not affected by the surface unevenness of the pattern printing layer 4 and a uniform matting effect can be obtained. Further, since the surface shape of the outer layer side of the pattern printing layer 4 is substantially smooth corresponding to the surface shape of the transparent substrate 3, light transmitted through the transparent substrate 3 and the like and reaching the pattern printing layer 4 is diffused It is not reflected and the glossiness can be sufficiently enhanced.

  The pattern print layer 4 is usually formed by printing using an ink containing a vehicle composed of a binder resin or a solvent as a main component, and a colorant such as a dye or a pigment added thereto and mixed therewith. Examples of the printing method include gravure printing, offset printing, letterpress printing, silk screen printing and the like. Of these, gravure printing is preferred.

  From the viewpoint of enhancing the decorative effect by the gloss of the pattern, the pattern print layer 4 preferably includes at least one of the chromatic color layer 4a and the glitter print layer 4b. When both the chromatic color layer 4a and the glitter print layer 4b are formed, they may be formed in parallel at the same position in the thickness direction of the packaging material 1, or alternatively, they may be partially overlapped in the thickness direction It may be done. It is preferable that at least a part of the pattern print layer corresponding to the configuration of (a) and / or (b) be the glitter print layer 4b.

As colorants of the chromatic color layer 4a, general purpose dyes and pigments (for example, inorganic pigments such as yellow lead, titanium yellow, red iron oxide, cadmium red, ultramarine blue, cobalt blue, etc .; quinacridone red, isoindolinone yellow, phthalocyanine blue etc. Organic pigments) can be used.
The glitter print layer 4 b is a layer printed using an ink containing a glitter pigment. Examples of bright pigments include pearl pigments and metal flakes. Among these, one type may be used alone or two or more types may be used in combination. A pearl pigment is preferable from the viewpoint of imparting resistance to a microwave oven heating or retort treatment to the packaging material. On the other hand, a metal scale is preferable from the viewpoint of imparting high metallic gloss to the pattern.

Examples of pearl pigments include white pearl pigments, interference pearl pigments, colored pearl pigments and the like.
In the white pearl pigment, the coating layer of mica is a colorless high refractive index material such as titanium dioxide, and the thickness of the coating layer is relatively small such as about 0.1 to 0.15 μm, and almost all wavelengths of light It looks white or silver to reflect light.
In the interference pearl pigment, the coating layer of mica is a colorless high refractive index material such as titanium dioxide, and the thickness of the coating layer is larger than that of the white pearl pigment and is more than 0.15 μm. This thickness causes the reflected and transmitted light to change, producing different interference colors. It may be called iris color pearl pigment or polarizing pearl pigment.
The colored pearl pigment is a chromatic color, and the coating layer of mica is a colored high refractive index material such as ferric oxide, and the white pearl pigment is further surrounded by a colored high refractive index material such as ferric oxide or the like And those coated with a pigment or other coloring agent in the coated layer of mica.

As a pearl pigment, from the viewpoint of obtaining a pearl paint color which imparts a high-quality feel even in all directions with higher brightness, at least one selected from white pearl pigments and interference pearl pigments, and colored pearl pigments It is preferable to include one or more selected from As one or more types selected from white pearl pigments and interference pearl pigments, white pearl pigments are preferable, and as one or more types selected from colored pearl pigments, a coating layer of mica is colored such as ferric oxide It is preferable to use a high refractive index material and a white pearl pigment that is surrounded by a colored high refractive index material.
In this case, a colored pearl pigment or mica coated with ferric oxide around the white pearl pigment as a colored pearl pigment in order to obtain a deep golden gloss even in all directions. It is preferable to use a colored pearlescent pigment in which ferric oxide is used, and it is more preferable to use a white colored pearlescent pigment as one or more kinds selected from white colored pearlescent pigments and interference pearlescent pigments.
When one or more types (A) selected from white pearl pigments and interference pearl pigments and one or more types (B) selected from colored pearl pigments are used in combination, A: B is a mass ratio, It is preferable that it is 1: 0.2 to 1:20, More preferably, it is 1: 0.5 to 1:15, More preferably, it is 1: 1 to 1:10.

  The content of the pearl pigment in the glitter print layer 4b is preferably 40 to 90% by mass, more preferably 50 in the glitter print layer 4b from the viewpoint of setting the amount sufficient for obtaining the gloss. It is -85 mass%, more preferably 60-80 mass%.

  The particle size of the pearl pigment is not particularly limited, and the average length is preferably 5 to 60 μm, more preferably 5 to 30 μm. In addition, the average length of a pearl pigment is calculated | required as an average value of the major axis of arbitrary 20 particle | grains observed with the optical microscope.

Examples of the metal flakes include metals and alloys such as aluminum, gold, silver, brass, titanium, chromium, nickel, nickel chromium and stainless steel.
The metal flakes are obtained by, for example, peeling a thin metal film formed by vacuum depositing the metal or alloy on a plastic film from the plastic film, crushing the peeled thin metal film, and stirring, or a powder of the metal or alloy Materials obtained by spreading and / or grinding the powder with a medium stirring mill, a ball mill, an attritor, etc., and further using a resin coated surface of these surfaces, etc. it can.

  The content of the metal flakes in the glitter print layer 4b is 3% by mass or more and 40 mass% in the glitter print layer 4b from the viewpoint of the microwave resistance when the container for the microwave oven is formed by the packaging material 1 It is preferable that it is less than%, More preferably, it is 10-30 mass%.

The metal flakes preferably have an average length of 1 to 50 μm, more preferably 2 to 30 μm, and still more preferably 5 to 20 μm from the viewpoint of uniform dispersibility in the glitter print layer 4 b. The average thickness is preferably 0.01 to 5 μm, more preferably 0.02 to 3 μm, and still more preferably 0.05 to 1 μm from the viewpoint of obtaining handleability and high metallic gloss. The aspect ratio (average length / average thickness) of the metal flakes is preferably 15 to 500.
The average length and the average thickness of the metal flakes are the length and thickness of 20 metal flakes by using a laser interference three-dimensional shape analysis apparatus in a state where the metal flakes are dispersed on a smooth substrate. Is determined as the average value of these measured values. The length of one metal scale piece means the maximum diameter (length) when planarly observing the metal scale piece in any axial direction. The thickness of one metal piece means the maximum thickness (length) of the metal piece in the direction (cross section) perpendicular to the axial direction. For example, when the X-axis direction of the processed image of the measurement result by the three-dimensional shape analysis apparatus is an arbitrary axis direction (measurement direction), the maximum diameter of one metal piece determined in the direction parallel to the X axis is 1 The length of each piece of metal scale. Even if the length in a direction not parallel to the X axis is larger than the maximum diameter, the length is not regarded as the maximum diameter. As a laser interference type three-dimensional shape analysis apparatus, for example, a shape analysis laser microscope "VK-X series" manufactured by Keyence Corporation can be used.

  Examples of the binder resin used in the ink include polyolefin resins such as polyethylene resins and chlorinated polypropylene resins, poly (meth) acrylic resins, polyvinyl chloride resins, polyvinyl acetate resins, and vinyl chloride-acetic acid. Vinyl copolymer, polystyrene resin, styrene-butadiene copolymer, vinylidene fluoride resin, polyvinyl alcohol resin, polyvinyl acetal resin, polyvinyl butyral resin, polybutadiene resin, polyester resin, polyamide resin, alkyd Resin, epoxy resin, unsaturated polyester resin, thermosetting poly (meth) acrylic resin, melamine resin, urea resin, polyurethane resin, phenol resin, xylene resin, maleic acid resin, nitrocellulose And ethyl cell Over scan, cellulose resins such as acetyl butyl cellulose, ethyl oxy ethyl cellulose, rubber and cyclized rubber rubber resin chloride, petroleum resin, rosin, and natural resins such as casein, and the like. These may be used alone or in combination of two or more.

Examples of the solvent used for the ink include alcohol solvents such as methanol, ethanol, normal propanol, isopropanol and propylene glycol monomethyl ether, ketone solvents such as acetone, methyl ethyl ketone and methyl isobutyl ketone, methyl acetate, ethyl acetate and normal acetate. Ester solvents such as propyl, aliphatic hydrocarbon solvents such as normal hexane, normal heptane and normal octane, alicyclic hydrocarbon solvents such as cyclohexane, methylcyclohexane and cycloheptane, aromatic solvents such as toluene and xylene And mineral spirits. These may be used alone or in combination of two or more. In addition, when there is a concern about the influence on the working environment at the time of printing and the package, among these, it is preferable that the aromatic solvent is not particularly included.
In the ink, if necessary, for example, fillers, stabilizers, plasticizers, antioxidants, light stabilizers such as UV absorbers, dispersants, thickeners, desiccants, lubricants, antistatic agents, etc. And optional additives such as crosslinking agents can be added.

(Ground color printing layer)
The ground color printing layer 5 is formed on the inner layer side of the pattern printing layer 4 from the viewpoints of raising the pattern of the pattern printing layer 4 and blocking transmission of light from the outer layer side to the package. The ground color printing layer 5 can be formed using the same method as the pattern printing layer 4 described above, and is preferably formed by reverse printing on the back surface of the pattern printing layer 4. The binder resin, the solvent and the additive of the printing ink for forming the ground color printing layer 5 may be the same as those described above for the picture printing layer 4.
The ground color printing layer 5 may be formed on the entire back surface of the pattern printing layer 4 or may be formed on a part of the back surface of the pattern printing layer 4. The total thickness of the ground color printing layer is preferably about 1.5 to 5 μm, and more preferably 1.5 to 3 μm.

  The ground color printing layer 5 preferably contains at least one of a black ground color layer and a white ground color layer. Moreover, it is preferable that the ground color printing layer 5 is single-color solid printing from the viewpoint of the role which brings out the pattern of the pattern printing layer 4, and printing efficiency etc. In addition, the ground color printing layer 5 seen from the outer layer side of the part which does not have the pattern of the pattern printing layer 4 can also be visually recognized as a character, a figure, a symbol, a pattern, a pattern, etc.

<Black ground color layer>
In particular, when the pattern print layer 4 includes the glitter print layer 4b, a black ground color layer is preferable from the viewpoint of increasing the depth and heavy feeling of glossiness by the glitter print layer 4b. The black ground color layer preferably has an L ^* value of 20 or less of the L ^* a ^* b ^* color system of the International Commission on Illumination (CIE) standard measured according to JIS Z8781-4: 2013, It is more preferably 10 or less.

  In the printing which forms a black ground color layer, the ink which used black dye, a pigment, etc. as a coloring agent is used, and it is preferable that a coloring agent is a black pigment from a viewpoint of making stable black color develop as ground color. The content of the black pigment in the black ground color layer is 10 to 50% by mass of the total solids constituting the black ground color layer, from the viewpoint of the balance of stable color development as a ground color and the strength of the printed film. Is more preferably 15 to 45% by mass, and still more preferably 20 to 40% by mass.

  As the black pigment, general-purpose black pigments such as carbon black and titanium black can be used. However, in the case where the packaging material 1 is for a microwave, these general-purpose black pigments have a possibility that the portion where the general-purpose black pigment is present may be locally heated by the microwave of the microwave and a hole may be opened. It is necessary to consider such as suppressing the content in the black ground color layer.

  Moreover, as a black pigment, a black pigment having near-infrared reflectance or near-infrared transmittance is also preferable. Examples of the black pigment having near-infrared reflectivity include complex oxides containing manganese as an essential element and containing at least one metal element other than manganese. Examples of the black pigment having near-infrared transparency include azomethine azo Based pigments, perylene pigments and the like can be mentioned.

The composite oxide is preferable for imparting heat retention property of the package to the packaging material 1 since it has near-infrared reflectivity. The metal elements other than manganese contained in the composite oxide may be used alone or in combination of two or more. As metal elements other than manganese contained in complex oxide, for example, Group 2 elements such as calcium and barium; Group 3 elements such as yttrium, lanthanum, praseodymium and neodymium; Group 4 elements such as titanium and zirconium; Examples thereof include metal elements such as Group 13 elements such as boron, aluminum, gallium and indium; and Group 15 elements such as antimony and bismuth. Among these, group 2 elements, group 4 elements and group 15 elements are preferable, calcium, titanium and bismuth are more preferable, and calcium and titanium are more preferable. Particularly preferred specific examples of the composite oxide include composite oxides containing manganese, calcium and titanium.
The structure of the complex oxide is not particularly limited, but is preferably a perovskite structure, an orthorhombic structure, a hexagonal crystal structure or the like from the viewpoint of a stable structure, its coloration, etc., and it is a perovskite structure Is more preferred.
Manganese-based composite oxides are described, for example, in International Publication WO 2016/125906 A1.

The azomethine azo pigment has a diazonium group which is a reaction compound of tetrachlorophthalimide and aminoaniline.
The perylene pigment is a pigment having a structure in which two oxygen atoms constituting a six-membered ring of perylenetetracarboxylic acid dianhydride are dropped, and examples thereof include perylene black and the like.

<White ground layer>
In particular, when the picture print layer 4 includes the chromatic layer 4a, a white ground color layer is preferable from the viewpoint of enhancing the coloration by the chromatic layer 4a. In addition, the white ground color layer can improve the impression of the package depending on the type of the package and the like.

  In the printing which forms a white ground color layer, the ink which made general-purpose white pigments, such as titanium white, zinc flower, and Litopon, as a coloring agent can be used. In addition, in order to adjust the color tone of a white ground color layer, dyes and pigments other than a white pigment may be included in a coloring agent. The content of the white pigment in the white ground color layer is 10 to 50% by mass of the total solid content of the white ground color layer, from the viewpoint of the stable color development as the ground color and the balance of the printed coating film strength. Is more preferably 15 to 45% by mass, and still more preferably 20 to 40% by mass.

(Transparent matte layer)
The transparent mat layer 2 is formed to make the pattern of the pattern print layer 4 visually recognized from the outer layer side matte by the unevenness of the outer layer side surface. The contrast between the pattern matted by the transparent mat layer 2 and the high-gloss pattern of the area having the configuration (a) or (b) enhances the decorative effect of the entire pattern visually recognized from the outer layer side be able to.
The thickness of the transparent mat layer 2 is preferably about 1 to 15 μm, more preferably 2 to 10 μm, and still more preferably 2.5 to 7 μm.

The transparent mat layer 2 relates to the uneven shape of the outer layer side surface, and the maximum height Ry at a cutoff value of 0.8 mm measured according to JIS B 0601: 1994 of the outer layer side surface is preferably 8 μm or less Preferably it is 6 micrometers or less. When the maximum height Ry is 8 μm or less, the contrast between the pattern matted by the transparent mat layer 2 and the pattern with high gloss (pattern having a configuration (a) and / or (b)) It becomes clearer. In particular, when the clear layer 6 is laminated on the outer layer side surface of the transparent mat layer 2 in the configuration (a), the pattern printed layer 4 visually recognized through the transparent base 3, the transparent mat layer 2 and the clear layer 6 The transparent mat layer 2 has the surface shape as described above from the viewpoint of causing a relatively strong feeling of gloss to be generated and emphasized relative to the pattern that is matted by the transparent mat layer 2. Is preferred.
Further, from the viewpoint of the slipperiness of the outer layer surface, the lower limit of the maximum height Ry is preferably 1 μm or more, more preferably 2 μm or more.
The maximum height Ry in the present invention is the roughness measured at a total of 20 points at 10 points in the flow direction (MD) on the outer layer side surface of the transparent mat layer 2 and at 10 points in the direction perpendicular to the MD direction (TD). It is the average value at a cutoff value of 0.8 mm for the curve.

Further, from the viewpoint of sufficiently matting the pattern of the pattern print layer 4 visually recognized from the outer layer side, the transparent mat layer 2 has a cutoff value of 0.8 mm measured according to JIS B0601: 1994 on the outer layer side surface. It is preferable that arithmetic mean roughness Ra of these is 0.2 micrometer or more, More preferably, it is 0.3 micrometer or more. Further, from the viewpoint of preventing white blurring of the pattern, the upper limit of the arithmetic average roughness Ra is preferably 2 μm, and more preferably 1 μm or less.
The arithmetic mean roughness Ra in the present invention is a total of 20 points measured at 10 points in the flow direction (MD) on the outer layer side surface of the transparent mat layer 2 and at 10 points in the direction perpendicular to the MD direction (TD). It is an average value at a cutoff value of 0.8 mm for a power curve.

  Further, from the viewpoint of enhancing the sense of quality by the pattern of the pattern printing layer 4, it is preferable that the uniformity of the surface roughness of the transparent mat layer 2 is high. Therefore, the ratio of the maximum height Ry to the arithmetic average roughness Ra Ry / Ra is preferably 12 or less, more preferably 10 or less. The lower limit of Ry / Ra is preferably 2 or more, more preferably 4 or more, from the viewpoint of suppressing a decrease in yield due to noticeable printing defects or defects such as surface roughness and scratches of a pattern.

The transparent mat layer 2 can be formed, for example, by printing using a mat ink (ink for transparent mat layer) containing a binder resin and a matting agent. Examples of the printing method include gravure printing, offset printing, letterpress printing, silk screen printing and the like. Of these, gravure printing is preferred.
As the binder resin, it is preferable to use a two-component curable resin. As a two-component curable resin, a two-component curable resin of a polyol and an isocyanate is preferable.

  Examples of the polyol include acrylic polyols, polyester polyols, epoxy polyols and the like, and among these, acrylic polyols are preferable. As an acrylic polyol, vinyl chloride modified acrylic polyol, vinyl chloride-vinyl acetate modified acrylic polyol, chlorinated polyolefin modified acrylic polyol, methyl (meth) acrylate 2-hydroxyethyl (meth) acrylate copolymer, octyl (meth) acrylate -Ethylhexyl (meth) acrylate-2-hydroxyethyl (meth) acrylate copolymer, methyl (meth) acrylate-butyl (meth) acrylate-2-hydroxyethyl (meth) acrylate-styrene copolymer, etc. may be mentioned, Among these, vinyl chloride modified acrylic polyol is preferable.

  Moreover, as an isocyanate, a well-known compound can be used. For example, aromatic isocyanates such as 2,4-tolylene diisocyanate (abbr .: TDI), naphthalene diisocyanate, 4,4'-diphenylmethane diisocyanate; 1,6-hexamethylene diisocyanate (abbr .: HMDI), isophorone diisocyanate (abbr .: IPDI) And methylene diisocyanate (abbr .: MDI), xylylene diisocyanate (abbr .: XDI), hydrogenated tolylene diisocyanate; and polyisocyanates such as aliphatic or alicyclic isocyanates such as hydrogenated diphenylmethane diisocyanate. Further, adducts or multimers of these isocyanates, for example, TDI adducts of trimethylpropane, trimers of TDI, etc. may also be mentioned.

Examples of matting agents include particles composed of inorganic substances such as silica, alumina, calcium carbonate, aluminosilicate, barium sulfate, acrylic beads, acrylic polymers, organic polymers such as polyethylene, urethane resin, polycarbonate, polyamide (nylon), etc. Among these, silica particles are preferred. The shape of the particles may, for example, be a polyhedron, a sphere, or a scale. The average particle diameter of the particles is preferably 0.1 to 15 μm, more preferably 0.5 to 10 μm. The average particle diameter of the matting agent particles is determined as a mass average value d50 in the particle size distribution measurement by the laser light diffraction method.
The matting agent is contained in the transparent mat layer 2 from the viewpoint of sufficiently matting the pattern of the pattern print layer 4 viewed from the outer layer side while maintaining the transparency (light transmittance) of the transparent mat layer 2 Is preferably added so as to be 2 to 50% by mass of the total solid content, more preferably 5 to 40% by mass.

As the solvent in the matte ink, the same one as the ink in the above-mentioned pattern print layer 4 can be used.
In addition, the matte ink may further contain, if necessary, a light stabilizer such as a stabilizer, a plasticizer, an antioxidant, an ultraviolet light absorber, and the like within the range that does not interfere with the function of the transparent matte layer 2 such as the matting effect. Optional additives such as dispersants, thickeners, desiccants, lubricants and antistatic agents can be added.

(Clear layer)
In the case of the packaging material 1 shown in FIG. 1, the clear layer 6 is formed on the outer layer side surface of the transparent mat layer 5 as the configuration (a), and has light transparency. The clear layer 6 can emphasize the pattern of the area in which the clear layer 6 is formed with respect to the pattern matted by the transparent mat layer 2 with relatively high gloss.
The thickness of the clear layer 6 is preferably about 0.5 to 15 μm, more preferably 1 to 10 μm, and still more preferably 2 to 7 μm.

  The clear layer 6 can be formed by coating, for example, with a gloss varnish (OP varnish) on the outer layer side surface of the transparent mat layer 5 in the area of the pattern giving the gloss. Such partial coating can be performed by, for example, gravure printing, offset printing, letterpress printing, flexographic printing, silk screen printing. Among these, gravure printing and flexographic printing are preferable.

As the gloss varnish, any of aqueous varnish and oily varnish can be used.
As an aqueous varnish, what melt | dissolved or disperse | distributed resin components, such as poly (meth) acrylic resin and a (meth) acryl- styrene copolymer, in water and a small amount of volatile organic solvents can be used, for example . Examples of volatile solvents include alcohols such as methanol, ethanol, normal propanol, isopropanol and propylene glycol monomethyl ether, acetone, methyl ethyl ketone, ethyl acetate and the like.
As oil-based varnishes, for example, resin components such as polyurethane resin, vinyl chloride-vinyl acetate copolymer, poly (meth) acrylic resin, chlorinated polypropylene resin and the like are dissolved or dispersed in a volatile organic solvent The thing can be used. Examples of volatile solvents include methyl ethyl ketone, toluene, ethanol, isopropanol and the like.
Additives such as lubricants and surfactants can be added to the aqueous varnish and the oil-based varnish, if necessary. The resin component in the aqueous varnish and the oil-based varnish is preferably 40 to 85% by mass.

(Intermediate layer)
The intermediate layer 7 can be provided as needed between the ground color printing layer 5 and the sealant layer 8 as shown in FIGS. 1 and 2. Examples of the intermediate layer 7 include a gas barrier layer and a plastic film layer, and these layers can be formed by bonding layers in contact with both surfaces with an adhesive (layer).
The total thickness of the intermediate layer 7 is preferably about 1 to 50 μm, more preferably 2 to 140 μm, and still more preferably 3 to 30 μm.

<Gas barrier layer>
The gas barrier layer blocks permeation of oxygen, water vapor, and the like between the packaged material by the packaging material 1 and the external environment of the packaging material 1. In addition, it may have a light shielding property to block transmission of visible light, ultraviolet light and the like. The gas barrier layer may be composed of one layer or multiple layers of two or more layers. The gas barrier layer can be made of a known material, and can be, for example, an aluminum foil or a plastic film on which a vapor deposition film or a coating film is formed. When forming a coating film, it is preferable to form in the surface of a vapor deposition film from a viewpoint of a gas-barrier improvement.
The plastic film surface may be subjected to surface treatment in advance from the viewpoint of improving the adhesion of a vapor deposition film or a coating film. Examples of the surface treatment include corona discharge treatment, ozone treatment, low temperature plasma treatment using oxygen gas, nitrogen gas and the like, glow discharge treatment, oxidant treatment, application of an anchor coating agent, and the like.

The vapor deposition film can be formed of, for example, inorganic substances such as silicon, aluminum, magnesium, calcium, potassium, tin, sodium, boron, titanium, lead, zirconium, yttrium, or oxides of these.
As a formation method of a vapor deposition film, physical vapor deposition (PVD) methods, such as vacuum deposition, sputtering, ion plating, etc., chemical vapor deposition (CVD), such as plasma chemical vapor deposition, thermal chemical vapor deposition, photochemical vapor deposition, etc. are mentioned, for example. Law etc. are mentioned.
The film thickness of the vapor deposition film varies depending on the film forming material, the required gas barrier performance and the like, but is usually preferably about 5 to 200 nm, more preferably 5 to 150 nm, and still more preferably 10 to 100 nm. In the case of an inorganic oxide such as silicon oxide or aluminum oxide, the thickness is preferably about 5 to 100 nm, more preferably 5 to 50 nm, and still more preferably 10 to 30 nm.

As the coating film, for example, a general formula R ¹ _n M (OR ² ) _m (wherein R ¹ and R ² are an organic group having 1 to 8 carbon atoms, M is a metal atom, and n is 0 or more) Integer, m represents an integer of 1 or more, and n + m is a valence of M)), and a sol of a polyvinyl alcohol resin and / or an ethylene-vinyl alcohol copolymer -Coating with a coating solution obtained by polycondensation by a sol-gel method in the presence of a gel method catalyst, acid, water and an organic solvent, and heat-treated at 50 to 300 ° C for 0.05 to 60 minutes It can be formed by
As a coating method, it can carry out by coating means, such as roll coating, such as a gravure roll coater, spray coating, spin coating, dipping, a brush, a bar coat, an applicator, for example. The dry film thickness of the coating film is preferably about 0.01 to 30 μm, more preferably 0.05 to 20 μm, and still more preferably 0.1 to 10 μm in one or more applications.

<Plastic film layer>
The plastic film layer in the intermediate layer is provided as necessary as a base for improving the strength of the packaging material 1 and the processability, and for forming other layers.
Specifically as a constituent material of a plastic film layer, the material similar to the transparent base material 3 can be used.

  From the viewpoint of heating in a microwave oven and retort treatment, it is preferable that the intermediate base layer be excellent in heat resistance in order to enhance heat resistance. As a specific example of the intermediate | middle base material layer which is excellent in heat resistance, the plastic film illustrated as a transparent base material in the packaging material for microwave ovens and retort containers is mentioned.

<Adhesive layer>
Each constituent layer of the packaging material 1 may be laminated via an adhesive layer from the viewpoint of improving the bonding strength between the respective layers. However, an adhesive can be used on the outer layer side of the pattern print layer 4 under the condition that it does not affect the visibility and the gloss of the pattern.
Each thickness of the adhesive layer is preferably about 0.01 to 20 μm, more preferably 0.05 to 15 μm, and still more preferably 0.1 to 10 μm.

  The adhesive layer can be formed by a method using a known adhesive for dry lamination. Examples of the adhesive for dry lamination include polyvinyl acetate adhesives, polyacrylate adhesives, cyanoacrylate adhesives, ethylene copolymer adhesives, cellulose adhesives, polyester adhesives, and polyamide adhesives. Adhesives, polyimide adhesives, amino resin adhesives such as urea resin and melamine resin, phenol resin adhesives, epoxy adhesives, polyurethane adhesives (for example, cured products of polyol and isocyanate), reaction type (Meth) acrylic acid based adhesives, rubber based adhesives such as chloroprene rubber or nitrile rubber, styrene-butadiene rubber, silicone based adhesives, inorganic adhesives based on alkali metal silicates or low melting point glass, etc. may be mentioned.

(Sealant layer)
As shown in FIGS. 1 and 2, it is preferable that a sealant layer 8 be laminated on the inner layer side of the ground color printing layer 5.
The sealant layer 8 is formed on the innermost layer of the packaging material 1, and the surface on the inner layer side is in direct contact with the material to be packaged to protect the material to be packaged. When formed, the sealant layer 8 is preferably resistant to penetration of a liquid. Moreover, when a sealed container is formed with the packaging material 1, it is preferable that sealing property can be ensured by heat-sealing the sealant layer 8. The sealant layer 8 may be composed of one layer or multiple layers of two or more layers.

  The total thickness of the sealant layer 8 is not particularly limited, and is appropriately set depending on the use of the packaging material 1 and the type and properties of the packaged material, etc., but usually, it is preferably about 10 to 200 μm . When a pouch (in particular, a retort pouch) is formed by the packaging material 1, the thickness of the sealant layer 8 is more preferably 20 to 150 μm, still more preferably 30 to 100 μm. When the lid is formed by the packaging material 1, the total thickness of the sealant layer 8 is more preferably 15 to 80 μm, and still more preferably 20 to 60 μm.

  As materials for forming the sealant layer 8, for example, low density PE (LDPE), linear low density PE (LLDPE), medium density PE (MDPE), high density PE (HDPE), ethylene-vinyl acetate copolymer And polyolefin based resins such as propylene homopolymers, ethylene-propylene block copolymers, ethylene-propylene random copolymers and the like, and one or two or more of these resins can be used.

The sealant layer 8 is preferably a non-stretched film made of the above-described resin from the viewpoint of suppression of shrinkage at the time of heat sealing.
Further, from the viewpoint of heat resistance in microwave heating and retort treatment, the sealant layer 8 is made of, for example, a propylene homopolymer, a PP-based resin such as an ethylene-propylene block copolymer, an ethylene-propylene random copolymer, HDPE, etc. It is preferable to form with resin excellent in heat resistance. The PP-based resin is preferably used properly according to the purpose, for example, an ethylene-propylene block copolymer when emphasis is on freezing resistance, and an ethylene-propylene random copolymer when emphasis is on transparency. Also, when heat resistance is important, a propylene homopolymer is preferable. In addition, when a packaging container provided with an automatic steaming mechanism for a microwave oven is formed by the packaging material 1, the seal strength is reduced by the sealant layer 8 at high temperature, from the viewpoint of facilitating the escape of the vapor in the packaging container. Ethylene-propylene block copolymers are preferred.

Moreover, when a lid is formed with the packaging material 1, it is preferable that the sealant layer 8 has easy peel property. Easy peelability is, for example, a property of being easy to peel off when the lid is peeled off from the container main body and opened in the lid which is joined to the container main body so as to seal the container of the container main body. is there.
The sealant layer 8 having easy peelability can be formed using two or more kinds of resins, and specifically, the adhesiveness between the resin of one body having good adhesion with the container body and the container body However, it can be formed by mixing another resin which is incompatible with the one resin. For example, when the container body is made of polypropylene, it is preferable to form the sealant layer 8 with a mixed resin of a polypropylene homopolymer as the one resin and another resin such as polyethylene, polybutene, or polystyrene. In the case where the sealant layer 8 has a multilayer structure, it is sufficient for the sealant layer to have easy peelability only in the innermost layer to be joined to the container body.

[Packaging container]
Various packaging containers can be formed using the packaging material 1. Examples of packaging containers include pouches and lidded containers, as well as cups and trays. The packaging container may be entirely formed of the packaging material 1, or alternatively, may be partially formed of the packaging material 1. The packaging container using the packaging material 1 of the present invention has a high quality feeling of the content by the packaging material 1 on which a pattern having a contrast in glossiness is formed when selling the content accommodated in the packaging container. Since it can impress a buyer, it can be suitably used, for example, in food containers, cosmetic containers, and the like.

[Lid]
The packaging material 1 can also be used to form a lid that is joined to the container body so as to seal the containing portion of the container body, as described in the description of the sealant layer 8 above.

  Hereinafter, the present invention will be described in detail by way of examples, but the present invention is not limited thereto.

[Production of packaging material]
Example 1
The packaging material 1 of the aspect shown in FIG. 1 was produced as follows.
On a part of the inner layer side (rear surface) of the transparent substrate (1), the ink for glitter print layer of the following composition is reverse printed by gravure printing to form a glitter print layer with a thickness of 1.0 μm. The glitter print layer and the color print layer having a thickness of 1.0 .mu.m are formed by backing printing the chromatic color layer ink of the following composition by gravure printing on a part of the portion where the print layer is not formed. A pattern print layer having a chromatic color layer was formed. Subsequently, the black ground color printing layer ink of the following composition was reverse printed (solid printing) by gravure printing on the pattern printing layer to form a black ground color printing layer having a thickness of 0.5 μm.
Subsequently, the ink for transparent mat layers of the following composition was gravure printed on the whole surface of the outer layer side (surface) of a transparent base material (1), and the 3.5-micrometer-thick transparent mat layer (1) was formed. Subsequently, the clear layer ink of the following composition was gravure printed on the transparent mat layer (1) of the area | region corresponding to the location in which the glitter print layer was formed, and the 3.0 micrometers-thick clear layer was formed.
Then, on the inner layer side (back side) of the black ground color print layer, aluminum vapor deposited PET with a thickness of 12 μm is bonded as an intermediate layer (1) (gas barrier layer having light shielding property) with a dry lamination adhesive, and further as a sealant layer A polyethylene film having a thickness of 100 μm was bonded with a dry laminating adhesive.
The outline of the laminated constitution from the outer layer side of the obtained packaging material is clear layer (3.0 μm) / transparent mat layer (1) (3.5 μm) / transparent base material (1) (15 μm) / pattern printed layer ( 1.0 μm) / black background printing layer (0.5 μm) / adhesive layer (3.0 μm) / intermediate layer (1) (12 μm) / adhesive layer (3.0 μm) / sealant layer (1) (100 μm) ). Numerical values in parentheses (unit: μm) represent the thickness of each layer (the same applies hereinafter). In addition, the black ground color printing layer can be seen from the outer layer side in the part which does not have any of a brilliant printing layer and a chromatic color layer.

The details of the constituent materials of each layer, the composition of the ink, and the like are shown below.
<Transparent substrate (1)>
Biaxially oriented nylon film: "Iron G-100" manufactured by Idemitsu Unitech Co., Ltd.
<Ink for glitter print layer>
White pearl pigment (average particle diameter 15 μm): 10 parts by mass Colored pearl pigment (colored pearl pigment whose coating layer of mica is ferric oxide, average particle diameter 15 μm): 20 parts by mass Anti-settling agent (fine particle silica 0.1 parts by weight Binder resin (polyurethane resin): 10 parts by weight Solvent (a mixed solvent of propylene glycol monomethyl ether, normal propyl acetate, ethyl acetate and isopropanol) 60 parts by weight <ink for chromatic color layer>
Organic red pigment: 3 parts by mass Anti-settling agent (fine particle silica): 2 parts by mass Binder resin (polyurethane resin): 20 parts by mass Solvent 1 (mineral spirit): 7 parts by mass Solvent 2 (propylene glycol Monomethyl ether, mixed solvent of normal propyl acetate, ethyl acetate and isopropanol): 70 parts by mass <ink for black ground color printing layer>
Binder resin (acrylic urethane resin): 15 parts by mass Black pigment (composite oxide containing manganese, calcium and titanium as metal elements, “MPT-370” manufactured by Ishihara Sangyo Co., Ltd., average primary particle diameter 0.8 μm) 5 parts by mass Solvent (mixed solvent of methyl ethyl ketone, ethyl acetate, butyl acetate and isopropanol): 80 parts by mass <ink for transparent mat layer (1)>
Silica particles (average particle size 3.0 μm): 30 parts by mass Binder resin (two-component curable polyurethane resin of polyol and isocyanate): 100 parts by mass Solvent (normal propyl acetate, ethyl acetate)
<Ink for clear layer>
Ink composition formed by dispersing an acrylic thermosetting resin composition in an aqueous solvent (a mixed solvent of water and isopropyl alcohol in a mass ratio of 3: 7) <Intermediate layer (1)>
Aluminum deposition PET: "EXC" made by Oike Kogyo Co., Ltd.
<Sealant layer (1)>
Polyethylene film: Dai Nippon Printing Co., Ltd. "DP-402"
<Adhesive for dry lamination>
Polyurethane adhesive

(Example 2)
In Example 1, the transparent mat layer (1) is changed to a transparent mat layer (2) gravure-printed using a transparent mat layer ink (2) having the following composition, and the other conditions are the same as in Example 1. The packaging material was made.
The outline of the laminated constitution from the outer layer side of the obtained packaging material is clear layer (3.0 μm) / transparent mat layer (2) (3.5 μm) / transparent base material (1) (15 μm) / pattern printed layer ( 1.0 μm) / black background printing layer (0.5 μm) / adhesive layer (3.0 μm) / intermediate layer (1) (12 μm) / adhesive layer (3.0 μm) / sealant layer (1) (100 μm) ).

<Ink for transparent mat layer (2)>
Silica particles (average particle diameter 3.5 μm): 25 parts by mass Binder resin (two-component curable polyurethane resin of polyol and isocyanate): 100 parts by mass Solvent (normal propyl acetate, ethyl acetate)

(Example 3)
In Example 1, the transparent mat layer (1) is changed to a transparent mat layer (3) gravure-printed using the ink for transparent mat layer (3) of the following composition, and the other conditions are the same as in Example 1. The packaging material was made.
The outline of the laminated constitution from the outer layer side of the obtained packaging material is clear layer (3.0 μm) / transparent mat layer (3) (3.5 μm) / transparent base material (1) (15 μm) / pattern printed layer 1.0 μm) / black background printing layer (0.5 μm) / adhesive layer (3.0 μm) / intermediate layer (1) (12 μm) / adhesive layer (3.0 μm) / sealant layer (1) (100 μm) ).

<Ink for transparent mat layer (3)>
Silica particles (average particle diameter 3.8 μm): 28 parts by mass Binder resin (two-component curable polyurethane resin of polyol and isocyanate): 100 parts by mass Solvent (normal propyl acetate, ethyl acetate)

(Example 4)
The packaging material 1 of the aspect shown in FIG. 1 was produced as follows.
A picture print layer and a black ground color print layer were formed on the inner layer side (back side) of the transparent substrate (2) in the same manner as in Example 1.
Subsequently, the ink (4) for transparent mat layers of the following composition was gravure printed on the whole surface of the outer layer side (surface) of a transparent base material (2), and the 3.5-micrometer-thick transparent mat layer (4) was formed. Next, the clear layer ink was gravure printed on the transparent mat layer (4) in the area corresponding to the location where the glitter print layer was formed, to form a clear layer having a thickness of 3.0 μm.
Then, on the inner layer side (rear surface) of the black ground color printing layer, a gas barrier film and an aluminum foil are sequentially laminated as an intermediate layer (2) with an adhesive for dry lamination, and a polypropylene film is dry laminated as a sealant layer (2). It stuck together with adhesive.
The outline of the laminated constitution from the outer layer side of the obtained packaging material is clear layer (3.0 μm) / transparent mat layer (4) (3.5 μm) / transparent base material (2) (12 μm) / pattern printed layer ( 1.0 μm) / black ground color printing layer (0.5 μm) / adhesive layer (3.0 μm) / intermediate layer (2) [plastic film (15 μm) + adhesive layer (3.0 μm) + aluminum foil (7 μm) ] / Adhesive layer (3.0 μm) / sealant layer (80 μm).

The details of the constituent materials of each layer and the composition of the ink are shown below.
<Transparent base material (2)>
Biaxially oriented PET: "Toyobo ester (registered trademark) film E5200" manufactured by Toyobo Co., Ltd.
<Ink for transparent mat layer (4)>
Silica particles (average particle diameter 2.5 μm): 30 parts by mass Binder resin (two-component curable polyurethane resin of polyol and isocyanate): 100 parts by mass Solvent (normal propyl acetate, ethyl acetate, methyl ethyl ketone)
<Intermediate layer (2)>
(2-1) Gas barrier film: biaxially stretched gas barrier nylon film, manufactured by Mitsubishi Chemical Co., Ltd. "Super Neal (registered trademark) SP-R-MW"
(2-2) Aluminum foil <Sealant layer (2)>
Unstretched polypropylene film, Toray Film Processing Co., Ltd. "ZK209"
<Adhesive for dry lamination> Polyurethane adhesive

(Comparative example 1)
A packaging material was produced in the same manner as in Example 1 except that the clear layer was not formed in Example 1.
The outline of the laminated constitution from the outer layer side of the obtained packaging material is as follows: transparent mat layer (1) (3.5 μm) / transparent substrate (1) (15 μm) / pattern print layer (1.5 μm) / black ground color Printing layer (0.5 μm) / adhesive layer (3.5 μm) / intermediate layer (1) (12 μm) / adhesive layer (3.5 μm) / sealant layer (1) (100 μm).

(Comparative example 2)
The packaging material which formed the design printing layer by surface printing was produced as follows.
The black ground color printing layer ink was used for gravure printing (solid printing) on the entire surface of the outer layer side (surface) of the transparent substrate (1) to form a black ground color printing layer having a thickness of 0.5 μm. . Then, the ink for glitter print layer is surface-printed by gravure printing to form a glitter print layer having a thickness of 1.0 μm, and the color print layer is formed in a part where the glitter print layer is not formed. The ink was reverse printed by gravure printing to form a chromatic color layer having a thickness of 1.5 μm, thereby forming a pictorial print layer having a glitter print layer and a chromatic color layer.
Subsequently, the ink (1) for transparent mat layers was gravure-printed on the whole surface on a pattern printing layer, and the 3.5-micrometer-thick transparent mat layer was formed. Next, the clear layer ink was gravure printed on the transparent mat layer (1) in the region corresponding to the location where the glitter print layer was formed, to form a clear layer having a thickness of 3.0 μm.
Then, aluminum vapor deposited PET is bonded to the inner layer side (rear surface) of the transparent base material (1) as an intermediate layer (1) (gas barrier layer having light shielding property) with an adhesive for dry lamination, and a polyethylene film as a sealant layer. Were bonded with a dry laminating adhesive.
The outline of the laminated constitution from the outer layer side of the obtained packaging material is clear layer (3.0 μm) / transparent mat layer (1) (3.5 μm) / pattern print layer (1.5 μm) / black ground color print layer (0.5 μm) / transparent substrate (1) (15 μm) / adhesive layer (3.5 μm) / intermediate layer (1) (12 μm) / adhesive layer (3.5 μm) / sealant layer (1) (100 μm) ).
The details of the constituent materials and the like of each layer are the same as in the first embodiment.

[Surface roughness measurement]
Regarding the outer layer side (surface) of the transparent mat layer of each packaging material manufactured in the above example, the surface roughness is measured under the following conditions according to JIS B0601: 1994, and the maximum height at a cutoff value of 0.8 mm Ry and arithmetic mean roughness Ra were determined. The results are shown in Table 1 below.
<Measurement conditions>
-Measuring equipment: surface roughness measuring machine, "Surfcom 130A" manufactured by Tokyo Seimitsu Co., Ltd.
Reference length: cut-off value of roughness curve λ c = 0.8 mm
・ Measurement speed: 0.15 mm / s
・ Measurement range: 400μm

[Appearance evaluation]
About the packaging material produced by the said Example and comparative example, the visibility evaluation test of the external appearance by the test monitor of 20 persons was done.
In the test, the packaging material was visually observed from the outer layer side while being tilted in various directions under fluorescent light in a room shielded from outdoor light to evaluate the contrast of glossiness and the impression of rough patterns.
With the comparative example 1 in which the transparent mat layer is formed on the entire surface of the outer layer, it was scored based on the criteria (1) to (4) below.
(1) The contrast is stronger than the following (2), and the pattern is enhanced with fine definition. +2 points (2) The contrast is stronger than the reference standard, but the pattern is slightly rough +1 point (3) The contrast and the pattern are rough Similar to the reference standard 0 points (4) The contrast is inferior to the reference standard and the design is rough -1 point The average value of the scoring results of 20 test monitors was calculated and evaluated as follows. The evaluation results are shown in Table 1 below.
<Evaluation rank>
A: Average point + 1.5 points or more B: Average point + 0.5 points or more + less than 1.5 points C: Average point 0 or more + less than 0.5 points D: Average point less than 0

  From the results shown in Table 1, the packaging material of the present invention can be emphasized as compared with the patterns of other areas by enhancing the gloss of the patterns of some areas, and the decorative effect is excellent. It was confirmed that it could be obtained.

DESCRIPTION OF SYMBOLS 1 Packaging material 2 Transparent mat layer 3 Transparent base material 4 Picture printing layer 4a Colored layer 4b Glitter printing layer 5 Ground color printing layer 6 Clear layer 7 Middle layer 8 Sealant layer

Claims (8)

At least a transparent mat layer, a transparent substrate, a pattern print layer and a ground color print layer are laminated in this order from the outer layer side,
The packaging material which has a structure of at least any one of following (a) and (b) in a part of surface of the said outer layer side of the area | region which a pattern is formed of the said pattern printing layer.
(A) clear layer laminated on the outer layer side surface of the transparent mat layer (b) unlaminated portion of the transparent mat layer   The packaging material according to claim 1, wherein the picture print layer includes at least one of a chromatic color layer and a glitter print layer.   The packaging material according to claim 1, wherein the ground color printing layer contains at least one of a black ground color layer and a white ground color layer.   The maximum height Ry at a cutoff value of 0.8 mm measured according to JIS B 0601: 1994 of the outer layer side surface of the transparent mat layer is 8 μm or less according to any one of claims 1 to 3. Packaging material.   The packaging material of any one of Claims 1-4 by which the sealant layer is laminated | stacked on the inner layer side of the said ground color printing layer.   A packaging container formed at least in part by the packaging material according to any one of claims 1 to 5.   The packaging container according to claim 6, wherein the packaging container is a pouch.   It is a lid joined to the said container main body so that the accommodating part of a container main body may be sealed, Comprising: The lid which is formed with the packaging material of any one of Claims 1-5.