JP2019108140A - Packaging material, package and lid body - Google Patents

Abstract

To provide a packaging material that can prevent the slippage of a hand at the time of opening even in a state where the hand is wetted with water, and a package and a lid body including the same.SOLUTION: A packaging material has a printed layer on the inner layer side of a transparent base material. At least part of the outer layer side of the transparent base material has a transparent mat layer. The transparent mat layer has a binder resin and a mat agent with an amount of oil absorption of 250 [g/100 g] or more. There are also provided a package and a lid body including the same.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.

JP, 2017-81589, A

  However, packaging containers such as pouches formed from back-printed plastic packaging materials have a problem that their hands are slippery at the time of opening or the like.

The present inventors examined the cause of hand slippage when opening the pouch formed from the back-printed plastic packaging material.
The inventors of the present invention firstly relate to the smoothness of the surface of the exposed transparent plastic film, in which the transparent plastic film is exposed on the surface side of the pouch formed from the back-printed plastic packaging material. I assumed that. Then, based on the assumption, a matte layer was formed on the surface side of the transparent plastic film to try to make the surface uneven.
However, even when the mat layer is formed on the surface side of the transparent plastic film, when the pouch is opened while the hand is wet with water, the hand can not be sufficiently suppressed from slipping at the time of opening. In the kitchen, the lavatory, the bathroom, etc., since the pouch is often opened while the hand is wet, it is an important issue to suppress the sliding of the hand when the pouch is opened in such a state.
Then, as a result of further investigations by the present inventors, by setting the mat layer formed on the surface side of the transparent plastic film to a specific configuration, even when the hand is wet with water, the hand at the time of opening the pouch is obtained. It has been found that the slip can be suppressed.

That is, the present invention provides the following [1] to [3].
[1] A packaging material having a print layer on the inner layer side of a transparent substrate, wherein at least a part of the outer layer side of the transparent substrate has a transparent mat layer, and the transparent mat layer has a binder resin and an oil absorption amount A packaging material containing a matting agent of 250 g / 100 g or more.
[2] A packaging container formed of the packaging material according to the above [1].
[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].

  The packaging material of the present invention, the packaging container using the same, and the lid can suppress slippage of the hand when opening the packaging container such as a pouch even when the hand is wet with water.

It is a schematic sectional drawing which shows embodiment of the packaging material of this invention. It is a schematic sectional drawing which shows other embodiment of the packaging material of this invention. It is a schematic plan view which shows embodiment of the packaging container of this invention. It is a schematic sectional drawing which shows other embodiment of the packaging container 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]
The packaging material of the present invention is a packaging material having a printing layer on the inner layer side of the transparent substrate, and has a transparent mat layer on at least a part of the outer layer side of the transparent substrate, and the transparent mat layer is a binder resin And oil absorption amount contains a matting agent of 250 [g / 100 g] or more.

FIG.1 and FIG.2 is a schematic sectional drawing which shows the example of the laminated structure of the packaging material 10 of this invention.
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, the packaging material 10 of the present invention has a printing layer 40 on the inner layer side of the transparent substrate 30, and at least a part of the transparent substrate 30 on the outer layer side. Have.
Moreover, in FIG.1 and FIG.2, it has the pattern printing layer 41 and the ground color printing layer 42 as the printing layer 40. FIG. Further, in FIG. 2, the pattern print layer 41 includes a chromatic color layer 41 a and a glitter print layer 41 b.

In the laminated structure of the packaging material 10, another layer may be included as a component layer.
For example, the packaging material 10 shown in FIGS. 1 and 2 includes an intermediate layer 70 and a sealant layer 80 on the inner layer side (rear surface) of the printing layer 40.
Moreover, the packaging material shown in FIG. 1 has the clear layer 60 in a part of outer layer side (surface side) of the transparent mat layer 20.

<Transparent base material>
The transparent substrate 30 is a substrate of the packaging material 10 and also a printing substrate when the printing layer 40 is reverse-printed. The transparent substrate 30 is made of a light transmitting material so that the printing layer 40 can be viewed from the outer layer side. For example, a plastic film, transparent paper, etc. are mentioned as a base material which has light transmittance, and a plastic film is used suitably especially.

  The thickness of the transparent substrate is not particularly limited and can be appropriately set depending on the application of the packaging material, but generally, it is preferably about 5 to 50 μm, more preferably 8 to 40 μm, and further more preferably Preferably it is 10-25 micrometers.

  The transparent substrate preferably has a total light transmittance of 85% or more, and more preferably 90% or more according to JIS K7361-1: 1997. The transparent substrate preferably has a haze of 1.0% or less according to JIS K 7136: 2000, more preferably 0.5% or less, and still more preferably 0.3% or less.

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.

<Printing layer>
The print layer is formed on the inner layer side of the transparent substrate. As a printing layer, a pattern printing layer and a ground color printing layer are mentioned. When using a pattern print layer and a ground color print layer in combination, it is preferable to form the ground color print layer on the inner side of the pattern print layer.

<< pattern print layer >>
The picture print layer is formed on the back surface of the transparent substrate. The picture print layer is a broad concept including, for example, characters (product name, product display, quality display, etc.), figures, photographs, symbols, patterns, patterns and the like. The pattern print layer 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 base material with an adhesive, but from the outer layer side From the viewpoint of making the pattern visible more sharply, it is preferable that the transparent substrate is formed by reverse printing. The picture print layer may be composed of one layer or may be composed of two or more layers.
The total thickness of the picture print layer is not particularly limited, but in general, it is preferably about 1 to 10 μm, and more preferably 1.5 to 5 μm. The picture print layer 41 may be printed on the entire surface of the transparent base 30 as shown in FIG. 1, or may be partially printed on the transparent base 30 as shown in FIG. .

  The picture print layer is usually formed by printing using an ink containing a vehicle composed of a binder resin and a solvent as a main component, and a colorant such as a dye and 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 41 preferably includes at least one of the chromatic color layer 41a and the glitter print layer 41b.
When both the chromatic color layer 41a and the glitter print layer 41b are formed, they may be formed in parallel at the same position in the thickness direction of the packaging material as shown in FIG. It may be formed so as to overlap.

As a coloring agent of the chromatic color layer 41a, 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 41 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. Sometimes called iris color pearl.
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.

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

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 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. Moreover, it is preferable that the aspect-ratios (average length / average thickness) of a metal scale piece are 15-500.
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.

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

  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 is formed on the inner layer side of the pattern printing layer as necessary from the viewpoint of raising the pattern of the pattern printing layer or blocking the transmission of light from the outer layer side to the package. Ru. The ground color printing layer can be formed using the same method as the pattern printing layer described above, and is preferably formed by reverse printing on the back surface of the pattern printing layer. As the binder resin, the solvent and the additive of the printing ink for forming the ground color printing layer, the same ones as those described above for the picture printing layer can be used.
The ground color printing layer may be formed on the entire back surface of the pattern printing layer, or may be formed on a part of the back surface of the pattern printing layer. 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 preferably includes at least one of a black ground color layer and a white ground color layer. Further, from the viewpoint of the role of drawing out the pattern of the pattern printing layer, the printing efficiency and the like, it is preferable that the ground color printing layer is single color solid printing. In addition, the ground color printing layer seen from the outer layer side of the part which does not have the pattern of a pattern printing layer can also be visually recognized as a character, a figure, a symbol, a pattern, a pattern, etc.

<Transparent matte layer>
The transparent mat layer is formed on at least a part of the outer layer side of the transparent substrate. In addition, the transparent mat layer contains a binder resin and a matting agent having an oil absorption of 250 [g / 100 g] or more.

By containing a matting agent having an oil absorption of 250 [g / 100 g] or more in the transparent mat layer, it is possible to suppress hand slippage when opening a packaging container such as a pouch even when the hand is wet with water. Can. The cause of this effect is estimated as follows.
First, the reason why the hand becomes slippery when wet with water is considered to be that water acts as a lubricant between the hand and the packaging container. In addition, even if the surface of the plastic film is made uneven by providing a transparent mat layer, the hand may not be suppressed in some cases because a thin film of water is formed on the surface of the transparent mat layer and the unevenness of the transparent mat layer is flattened. It is considered to be
On the other hand, when the transparent mat layer contains a matting agent having an oil absorption of 250 g / 100 g or more, the matting agent absorbs water, and a thin film of water is hardly formed on the surface of the transparent mat layer. Therefore, it is thought that sliding of hands wet with water is suppressed.

The oil absorption of the matting agent is preferably 270 g / 100 g or more, and more preferably 280 g / 100 g or more.
The upper limit of the oil absorption of the matting agent is not particularly limited, but if the oil absorption is too large, the cohesiveness of the matting agent becomes too strong and it becomes difficult to control the matte feeling, so that it is 600 g / 100 g or less Preferably, it is 500 [g / 100 g] or less, more preferably 400 [g / 100 g] or less.
In the present specification, the oil absorption is measured according to JIS K 5101-13-2, "Pigment test method-Part 13: Oil absorption-Section 2: Simmered oil method".

The content ratio of the matting agent having an oil absorption of 250 [g / 100 g] or more with respect to the total solid content of the transparent mat layer is preferably 2.0 to 50.0 mass%, and 5.0 to 40.0 mass. %, More preferably 15.0 to 30.0% by mass.
By setting the content of the matting agent having an oil absorption amount of 250 [g / 100 g] or more to 2% by mass or more, water can be easily absorbed by the matting agent, and slippage of a hand wet with water can be easily suppressed. Further, by setting the content of the matting agent having an oil absorption of 250 [g / 100 g] or more to 50% by mass or less, the binding property of the matting agent in the transparent matte layer can be easily made favorable.

The average particle diameter of the matting agent having an oil absorption of 250 [g / 100 g] or more is preferably 0.1 to 15.0 μm, more preferably 1.0 to 10.0 μm, and 2.0 to 7. More preferably, the thickness is 5 μm, and still more preferably 2.7 to 5.0 μm.
By making the surface of the transparent mat layer uneven by making the average particle diameter of the matting agent having an oil absorption of 250 [g / 100 g] or more 0.1 μm or more, it is possible to easily suppress the sliding of the hand wet with water . Further, by setting the average particle diameter of the matting agent having an oil absorption of 250 [g / 100 g] or more to 15.0 μm or less, the surface of the transparent mat layer is made excessively uneven, thereby making the pattern of the printed layer visible. Can be suppressed.
In the present specification, the average particle diameter of the particles of the matting agent is measured as a mass average value d50 in the particle size distribution measurement by the laser light diffraction method.

As the matting agent, particles made of an inorganic substance such as silica, alumina, calcium carbonate, aluminosilicate and barium sulfate are preferable. Among these, silica having excellent transparency is preferable.
The shape of the matting agent may, for example, be a sphere, a polyhedron, a scaly shape or an irregular shape. Among these, from the viewpoint of slip control, an irregular shape is preferable.

The transparent mat layer may contain a matting agent having an oil absorption of less than 250 [g / 100 g] as long as the effects of the present invention are not impaired.
The proportion of a matting agent having an oil absorption of 250 g / 100 g or more among all the matting agents contained in the transparent matting layer is preferably 80% by mass or more, and more preferably 90% by mass or more. It is more preferable that it is 95 mass% or more, and it is still more preferable that it is 100 mass%.

The thickness of the transparent mat layer is preferably 1.0 to 15.0 μm, more preferably 1.5 to 10.0 μm, and still more preferably 1.8 to 6.0 μm.
By setting the thickness of the transparent mat layer to 1.0 μm or more, water can be easily absorbed by the matting agent, and slippage of a hand wet with water can be easily suppressed. Moreover, it can suppress that the visibility of the pattern of a printing layer falls by setting the thickness of a transparent mat layer to 15.0 micrometers or less.

  The ratio (d / h) of the average particle diameter d of the matting agent having an oil absorption of 250 g / 100 g or more to the thickness h of the transparent matting layer is for suppressing hand slippage and for suppressing the loss of the matting agent From the viewpoint of balance, it is preferably 0.5 to 2.0, more preferably 0.7 to 1.8, and still more preferably 0.9 to 1.6.

  As the binder resin for the transparent mat layer, general-purpose thermoplastic resins and curable resins can be used, and 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 (abbreviation: MDI), xylylene diisocyanate (abbreviation: 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.

The outer layer side surface of the transparent mat layer preferably has an arithmetic average roughness Ra of 0.2 to 2.0 μm at a cutoff value of 0.8 mm measured according to JIS B0601: 1994, and 0.3 to 0.3 The thickness is more preferably 1.5 μm, and still more preferably 0.5 to 1.0 μm.
By making Ra of the surface on the outer layer side of the transparent mat layer 0.2 μm or more, by making the surface of the transparent mat layer uneven, it is possible to easily suppress the sliding of a hand wet with water. In addition, by setting the Ra of the outer layer side surface of the transparent mat layer to 2.0 μm or less, the surface of the transparent mat layer is excessively roughened, thereby suppressing the decrease in the visibility of the pattern of the print layer. .
In the present specification, the arithmetic mean roughness Ra is 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 (TD). Average value.

  The transparent mat layer 20 may be formed on the entire surface on the outer layer side of the transparent substrate 30 as shown in FIG. 1 or may be formed on a part on the outer layer side of the transparent substrate 30 as shown in FIG. Good. When it is set as a structure like FIG. 2, a difference of gloss arises in the location which has the transparent mat layer 20, and the location which does not have the transparent mat layer 20, and it is preferable at the point which can make designability high.

  The transparent mat layer 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 solvent in the matte ink, the same one as the ink in the above-mentioned picture print layer can be used.
In addition, the matte ink may further contain, if necessary, a stabilizer, a plasticizer, a light stabilizer such as an antioxidant, an ultraviolet absorber, a dispersant, a thickener, and the like within the range not to impair the effects of the present invention. Optional additives such as desiccants, lubricants and antistatic agents can be added.

<Clear layer>
A clear layer 60 may be provided on a part of the transparent mat layer 20 as shown in FIG. By setting it as this structure, the difference of gloss arises between the location which has a clear layer, and the location which does not have a clear layer, and it is preferable at the point which can make designability high.
The thickness of the clear layer 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 can be formed by coating, for example, with a gloss varnish (OP varnish), on the outer layer side surface of the transparent mat layer 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.

<Middle class>
The intermediate layer 70 can be optionally provided between the printing layer 40 and the sealant layer 80 as shown in FIGS. 1 and 2. As an intermediate | middle layer, a gas barrier layer, a plastic film layer, etc. are mentioned, for example, These layers can be formed by joining via a layer and contact agent (layer) which contact | connect on both surfaces.
The total thickness of the intermediate layer 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 and the external environment of the packaging material. 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 needed as a substrate for improving the strength of the packaging material and the processability, and for forming other layers.
As a constituent material of a plastic film layer, the material similar to a transparent base material can be used specifically ,.

  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 may be laminated via an adhesive layer from the viewpoint of improving the bonding strength between the respective layers. However, on the outer layer side of the printing layer, an adhesive can be used on 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 80 be laminated on the inner layer side of the printing layer 40.
The sealant layer is formed on the innermost layer of the packaging material, and the surface on the inner layer side is in direct contact with the package to protect the package, and in particular, the packaging material of the liquid is formed by the packaging material In such a case, the sealant layer is preferably resistant to penetration of the liquid. Moreover, when a sealed container is formed with a packaging material, it is preferable that sealing property can be ensured by heat-sealing a sealant layer. The sealant layer may be composed of one layer or multiple layers of two or more layers.

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

  Examples of materials constituting the sealant layer include low density PE (LDPE), linear low density PE (LLDPE), medium density PE (MDPE), high density PE (HDPE), ethylene-vinyl acetate copolymer, Examples thereof include polyolefin resins such as propylene homopolymers, ethylene-propylene block copolymers, and ethylene-propylene random copolymers, and one or more of these resins can be used.

The sealant layer 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 vaporizing mechanism for a microwave oven is formed by a packaging material, the seal strength is lowered by the sealant layer at high temperature, and from the viewpoint of facilitating the escape of the vapor in the packaging container Propylene block copolymers are preferred.

Moreover, when a lid is formed with a packaging material, it is preferable that a sealant layer 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 having easy peelability can be formed using two or more kinds of resins, and specifically, the adhesion between the resin of one body having good adhesion to the container body and the container body is It can be formed by mixing other resins which are not good and are incompatible with the one resin. For example, when the container body is made of polypropylene, it is preferable to form a sealant layer of a mixed resin of a polypropylene homopolymer as the one resin and other resins such as polyethylene, polybutene, polystyrene and the like. In the case where the sealant layer has a multilayer structure, it is sufficient that the sealant layer has easy peelability only in the innermost layer to be joined to the container body.

[Packaging container]
The packaging container of the present invention is formed of the above-mentioned packaging material of the present invention.

  In the packaging container, the outermost layer of at least a part of the outer peripheral end of the packaging container is preferably a transparent mat layer. When the packaging container has the configuration, when the packaging container is opened in a state where the hand is wet with water, if the outermost layer of the outer peripheral end is opened from a portion that is a transparent mat layer, the hand is prevented from slipping it can.

  In the case of the packaging container having the notch portion 91 or the knob portion 92 as shown in FIGS. 3 and 4, it is preferable that the outermost layer of the notch portion 91 or the knob portion 92 is a transparent mat layer. With this configuration, it is possible to more effectively suppress the slip of the hand when opening the packaging container in a state where the hand is wet with water.

  Examples of packaging containers include pouches and lidded containers, as well as cups and trays. The present invention is extremely effective because the pouch requires relatively large force at the time of opening and is slippery when the hand is wet with water.

[Lid]
The lid 95 of the present invention is a lid 95 joined to the container main body 93 so as to seal the housing portion 94 of the container main body 93, and is formed of the packaging material 10 of the present invention described above. is there.
The lid 95 of the present invention preferably has a knob 92, and the outermost layer of the knob 92 is preferably a transparent mat layer.

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

1. Production of Packaging Material (Example 1)
The chromatic color layer ink of the following formulation was reverse printed by gravure printing on the entire surface of the inner layer side (rear surface) of the transparent substrate by gravure printing to form a chromatic color layer having a thickness of 1.0 μm, thereby forming a picture print layer.
Subsequently, the ink for transparent mat layers of the following prescription was gravure-printed on the whole surface of the outer layer side (surface) of a transparent base material, and a 3.0 micrometers-thick transparent mat layer was formed. Next, the clear layer ink of the following formulation was gravure printed on a part (near the center) on the transparent mat layer to form a clear layer having a thickness of 3.0 μm.
Then, on the inner layer side (back side) of the picture print layer, a 12 μm thick aluminum-deposited PET is bonded as an intermediate layer (gas barrier layer having a light shielding property) with a dry laminating adhesive, and a 100 μm thick 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 (3.0 μm) / transparent substrate (15 μm) / pattern printed layer (1.0 μm) / adhesive Agent layer (3.0 μm) / intermediate layer (12 μm) / adhesive layer (3.0 μm) / sealant layer (100 μm). Numerical values in parentheses (unit: μm) represent the thickness of each layer (the same applies hereinafter).

The details of the constituent materials of each layer and the formulation of the ink are shown below.
<Transparent base material>
Biaxially oriented nylon film: "Iron G-100" manufactured by Idemitsu Unitech Co., Ltd.
<Ink for chromatic 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 transparent mat layer>
· Unshaped silica particles (average particle diameter 3.0 μm, oil absorption amount 260 [g / 100 g]): 30 parts by mass · Binder resin (two-component curable polyurethane resin of polyol and isocyanate): 100 parts by mass · Solvent (acetic acid) Normal propyl, ethyl acetate)
Note: The ratio of silica particles to the total solid content of the transparent mat layer ink is 23.1% by mass.
<Ink for clear layer>
Ink composition obtained by dispersing acrylic thermosetting resin composition in aqueous solvent (3: 7 mixed solvent of water and isopropyl alcohol) <intermediate layer>
Aluminum deposition PET: "EXC" made by Oike Kogyo Co., Ltd.
<Sealant layer>
Polyethylene film: Dai Nippon Printing Co., Ltd. "DP-402"
<Adhesive for dry lamination>
Polyurethane adhesive

(Examples 2 to 10) (Comparative Examples 1 to 2)
In Example 1, Example except that the average particle diameter and oil absorption of the silica particles of the transparent mat layer, the content ratio of the silica particles in the transparent mat layer, and the thickness of the transparent mat layer were changed to the conditions of Table 1. In the same manner as in 1, packaging materials of Examples 2 to 10 and Comparative Example 1 were obtained.
Moreover, the packaging material of the comparative example 2 was obtained like Example 1 except not forming a transparent mat layer.

2. Preparation of Packaging Container (Pouch) The packaging materials of Examples 1 to 10 and Comparative Examples 1 and 2 are folded so that the sealant layer is on the inner layer side, and the four sealant sides of the outer periphery are heated to bond the opposing sealant layers to each other. The Furthermore, as shown in FIG. 3, the notch part was formed in a part of adhesion | attachment location, and the packaging container (pouch) of Examples 1-10 and Comparative Examples 1-2 was obtained.

3. Evaluation 3-1. Suppression of Slippage With the hands wet, the packaging containers (pouches) of Examples 1 to 10 and Comparative Examples 1 and 2 were opened from the notch. From the four generations of 20's, 30's, 40's and 50's, a total of 40 men and women of 5 men and women performed the above-mentioned work and evaluated the slipperiness of the hand at the time of opening.
The average score of the evaluations of the above 40 persons was calculated, with 3 points feeling that the hand is hard to slip, 2 points that can not be said either way, and 1 point that the hand feels slipping. The results are shown in Table 1.
<Evaluation criteria>
A: average mark 2.6 super A ^-: average point of 2.3 to 2.6 or lower B: following average point 2.0 Ultra 2.3 C: average point of 1.5 to 2.0 D : Average score is less than 1.5

3-2. Visibility of Pattern Printed Layer The packaging containers (pouches) of Examples 1 to 10 and Comparative Examples 1 and 2 are visually observed under illumination of a fluorescent light, and whether the pattern of the pattern printed layer can be clearly seen or not evaluated. As a result, "A" indicates that the pattern is clearly visible and "C" indicates that the pattern is not clearly visible.

  From the results shown in Table 1, it was confirmed that the packaging material of the present invention and the packaging container using the same can suppress slipping of the hand at the time of opening even when the hand is wet with water.

10: Packaging material 20: Transparent matte layer 30: Transparent substrate 40: Printed layer 41: Picture printed layer 41a: Chromatic layer 41b: Bright print layer 42: Ground printed layer 60: Clear layer 70: Intermediate layer 80: Sealant layer 91: notch portion 92: knob portion 93: container body 94: accommodation portion 95: lid 100: packaging container

Claims (10)

  It is a packaging material which has a printing layer in the inner layer side of a transparent substrate, and has a transparent mat layer in at least one copy of the outer layer side of the transparent substrate, and the transparent mat layer has a binder resin and an oil absorption of 250 [g Packaging material containing a matting agent of 100 g or more.   The packaging material of Claim 1 whose content rate of the said matting agent with respect to the total solid of the said transparent mat | matte layer is 2.0-50.0 mass%.   The packaging material of Claim 1 or 2 whose average particle diameter of the said matting agent is 0.1-15.0 micrometers.   The packaging material according to any one of claims 1 to 3, wherein the thickness of the transparent mat layer is 1.0 to 15.0 μm.   The packaging material according to any one of claims 1 to 4, wherein a sealant layer is laminated on the inner layer side of the print layer.   A packaging container formed of the packaging material according to any one of claims 1 to 5.   The packaging container according to claim 6, wherein the outermost layer of at least a part of the outer peripheral end of the packaging container is the transparent mat layer.   The packaging container according to claim 6, wherein the packaging container has a notch or a grip, and the outermost layer of the notch or the grip is the transparent mat layer.   The packaging container according to any one of claims 6 to 8, 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.