Package, label, lid material, laminate tube and bag

Abstract

To provide a package, label, lid material, laminate tube and bag that can improve light blocking effect and design.SOLUTION: The package 10 comprises a base layer 11, a first shield layer 12, a light blocking layer 13, and a sealant layer 14 laminated in this order. The first shield layer 12 contains a metal particle. The light blocking layer 13 contains a black pigment.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to packages, labels, lidstocks, laminated tubes and bags. [Background technology]

[0002] Plastic films are known as packaging materials used in packaging bags for containing food. Such plastic films may be given light-shielding properties in order to suppress deterioration of the contents (food, etc.) contained in the packaging bag. In this case, packaging materials that have an aluminum foil layer or an aluminum vapor deposition layer to impart light-shielding properties are known.

[0003] On the other hand, packaging materials with an aluminum foil layer or an aluminum vapor deposition layer are not suitable for applications such as heating in a microwave oven, and in recent years, there has been a demand to not use aluminum foil, etc. For this reason, packaging materials with a black ink layer or a gray light-shielding layer (i.e., a mixed layer of black ink and white ink) instead of an aluminum foil layer or an aluminum vapor deposition layer are known (Patent Document 1). Patent Document 1 discloses a packaging material that has a shielding layer made of white ink between the pattern print layer and the light-shielding layer in order to improve the color development of the pattern print layer. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2014-94767 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, even if the packaging material has a shielding layer made of white ink, there is a possibility that the blackness or darkness caused by the black ink layer or gray light-shielding layer cannot be sufficiently shielded. In this case, when a bag is made from the packaging material, the pattern of the picture printing layer may look dull. For this reason, a package capable of improving the light-shielding property and design is required.

[0006] The present disclosure has been made in consideration of these points, and aims to provide packaging, labels, lids, laminated tubes, and bags that can improve light-blocking properties and design. [Means for solving the problem]

[0007] The embodiments of the present disclosure relate to the following [1] to

[12] .

[0008] [1] The film has a base layer, a first shielding layer, a light-shielding layer, and a sealant layer laminated in this order; the first shielding layer includes metal particles; The packaging body, wherein the light-shielding layer contains a black pigment.

[0009] [2] The packaging body according to [1], wherein the content of the black pigment in the light-shielding layer is 4% or more and 50% or less.

[0010] [3] The packaging body according to [1] or [2], wherein the light-shielding layer does not contain metal particles, white pigments, or color pigments.

[0011] [4] The packaging body described in any one of [1] to [3], further comprising a picture printed layer provided between the base material layer and the first shielding layer.

[0012] [5] The packaging body described in any one of [1] to [4], further comprising a second shielding layer provided between the base material layer and the first shielding layer, the second shielding layer containing white ink.

[0013] [6] The packaging body described in any one of [1] to [5], further comprising a barrier layer provided between the base material layer and the first shielding layer.

[0014] [7] The package according to any one of [1] to [6], wherein the maximum transmittance of light having a wavelength of 400 nm or more and 800 nm or less, measured in accordance with JIS K7361-1:1997, is less than 3.0%.

[0015] [8] The packaging body described in any one of [1] to [7], further comprising an intermediate layer provided between the light-shielding layer and the sealant layer.

[0016] [9] The packaging body described in any one of [1] to [8], wherein the thickness of the first shielding layer is 0.5 μm or more and 5.0 μm or less.

[0017]

[10] The packaging body according to any one of [1] to [9], wherein the thickness of the light-shielding layer is 0.1 μm or more and 3.0 μm or less.

[0018]

[11] A label comprising a packaging body described in any one of [1] to

[10] .

[0019]

[12] A lid material comprising a packaging body described in any one of [1] to

[10] .

[0020]

[13] A laminated tube comprising a packaging body according to any one of [1] to

[10] .

[0021]

[14] A bag comprising a packaging body according to any one of [1] to

[10] . Effect of the Invention

[0022] According to the present disclosure, the light-blocking properties and design of the packaging body can be improved. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is a cross-sectional view showing an example of a layer structure of a packaging body according to the present embodiment. [Diagram 2] FIG. 2 is a cross-sectional view showing an example of a layer structure of the packaging body according to the present embodiment. [Diagram 3] FIG. 3 is a cross-sectional view showing an example of a layer structure of the packaging body according to the present embodiment. [Figure 4] FIG. 4 is a cross-sectional view showing an example of a layer structure of the packaging body according to the present embodiment. [Diagram 5] FIG. 5 is a cross-sectional view showing an example of a layer structure of the packaging body according to the present embodiment. [Figure 6] FIG. 6 is a cross-sectional view showing an example of a layer structure of the packaging body according to the present embodiment. [Figure 7] FIG. 7 is a partial vertical cross-sectional view showing a container equipped with a label according to this embodiment. [Figure 8] FIG. 8 is a partial vertical cross-sectional view showing a container equipped with a lid according to this embodiment. [Figure 9] FIG. 9 is a partial vertical sectional view showing the laminate tube according to this embodiment. [Figure 10] FIG. 10 is a plan view showing the bag according to the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] An embodiment will be described below with reference to the drawings. FIGS. 1 to 10 are diagrams showing an embodiment. Each of the figures shown below is a schematic diagram. Therefore, the size and shape of each part are appropriately exaggerated to facilitate understanding. In addition, the present invention can be modified appropriately within the scope of the technical concept. In each of the figures shown below, the same parts are given the same reference numerals, and some detailed explanations may be omitted. In addition, the numerical values ​​such as the dimensions of each member and the material names described in this specification are examples of an embodiment, and can be appropriately selected and used without being limited thereto. In this specification, terms specifying shapes and geometric conditions, such as parallel, orthogonal, and vertical, are interpreted to include substantially the same state in addition to their strict meanings.

[0025] <Package> As shown in FIG. 1 to FIG. 6, the packaging body 10 includes a base layer 11, a first shielding layer 12, a light-shielding layer 13, and a sealant layer 14 laminated in this order from an outer surface 101 to an inner surface 102. The packaging body 10 may further include a picture-printed layer 15 provided between the base layer 11 and the first shielding layer 12. The packaging body 10 may further include a second shielding layer 16 provided between the base layer 11 and the first shielding layer 12. The packaging body 10 may further include a barrier layer 17 provided between the base layer 11 and the first shielding layer 12. The packaging body 10 may further include an intermediate layer 18 provided between the light-shielding layer 13 and the sealant layer 14. The outer surface 101 is the surface facing the opposite side to the contents in a label 20 to be described later. Moreover, the inner surface 102 is the surface of the label 20, etc., described below, that faces the contents.

[0026] Specifically, as shown in FIG. 1, the packaging body 10 comprises, in this order from the outer surface 101 to the inner surface 102, a base material layer 11, a second shielding layer 16, a first shielding layer 12, a light-shielding layer 13, a first adhesive layer 19a, a barrier layer 17, an intermediate layer 18, a second adhesive layer 19b, and a sealant layer 14.

[0027] As shown in FIG. 2, the packaging body 10 includes, in this order from the outer surface 101 to the inner surface 102, a base material layer 11, a first shielding layer 12, a light-shielding layer 13, a first adhesive layer 19a, an intermediate layer 18, a second adhesive layer 19b, and a sealant layer 14.

[0028] As shown in FIG. 3, the packaging body 10 includes, in this order from the outer surface 101 to the inner surface 102, a base material layer 11, a second shielding layer 16, a first shielding layer 12, a light-shielding layer 13, a first adhesive layer 19a, an intermediate layer 18, a second adhesive layer 19b, and a sealant layer 14.

[0029] As shown in FIG. 4, the packaging body 10 includes, in this order from the outer surface 101 to the inner surface 102, a base material layer 11, a barrier layer 17, a second shielding layer 16, a first shielding layer 12, a light-shielding layer 13, a first adhesive layer 19a, an intermediate layer 18, a second adhesive layer 19b, and a sealant layer 14.

[0030] As shown in FIG. 5, the packaging body 10 includes, in this order from the outer surface 101 to the inner surface 102, a base material layer 11, a pattern printed layer 15, a second shielding layer 16, a first adhesive layer 19a, an intermediate layer 18, a first shielding layer 12, a light-shielding layer 13, a second adhesive layer 19b, and a sealant layer 14.

[0031] As shown in FIG. 6, the packaging body 10 includes, in this order from the outer surface 101 to the inner surface 102, a base material layer 11, a pattern printed layer 15, a second shielding layer 16, a first adhesive layer 19a, a first shielding layer 12, a light-shielding layer 13, an intermediate layer 18, a second adhesive layer 19b, and a sealant layer 14.

[0032] In the packaging body 10 shown in FIGS. 1 to 6, the base material layer 11 forms an outer surface 101 of the packaging body 10, and the sealant layer 14 forms an inner surface 102 of the packaging body 10.

[0033] Each layer of the package 10 will now be described.

[0034] <<Base material layer>> The base layer 11 is a layer for supporting, for example, the sealant layer 14 and the like, and for increasing the strength of the entire package 10. As the base layer 11, a resin film constituting a normal package may be appropriately used. Specifically, as the base layer 11, a film made of low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-density polyethylene, polypropylene, polyvinyl alcohol, polyacrylonitrile, polycarbonate, ethylene-vinyl acetate copolymer, ionomer, ethylene-(meth)acrylic acid copolymer, ethylene-ethyl (meth)acrylate copolymer, ethylene-propylene copolymer, methylpentene, polybutene, acid-modified polyolefin resin, polyamide resin, polystyrene resin, low-crystalline saturated polyester or amorphous polyester resin, polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polyvinylidene fluoride (PVDF), tetrafluoroethylene-ethylene copolymer (ETFE), polytetrafluoroethylene (PTFE), MXD6, or the like may be used.

[0035] Among the above-mentioned resin films, polyester resins such as polyethylene terephthalate (hereinafter also referred to as "PET"), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), and polybutylene naphthalate (PBN); polyamide resins such as polycaproamide (nylon 6), polyhexamethylene adipamide (nylon 66), and poly-p-xylylene adipamide (MXD6 nylon); and polyolefin resins such as polyethylene and polypropylene are preferred. In particular, PET film is preferred as the material for the base layer 11 because of its high transparency, excellent dimensional stability, and excellent heat resistance. As the material for the base layer 11, a mixture of the above-mentioned polyester resin, polyamide resin, and polyolefin resin may be used.

[0036] The base layer 11 may be made of a multilayer film in which two or more resin films are laminated. When the base layer 11 is made of a multilayer film, each layer may have the same composition or different compositions. In addition, the base layer 11 is preferably transparent or translucent.

[0037] The resin film constituting the base layer 11 may be a non-stretched film, but from the viewpoint of transparency, etc., a uniaxially stretched film or a biaxially stretched film may be preferably used. The thickness of the base layer 11 is not particularly limited, but may be about 5 μm or more and 50 μm or less, 5 μm or more and 40 μm or less, or 10 μm or more and 30 μm or less.

[0038] The surface of the base layer 11 may be subjected to a surface treatment such as a corona treatment, an ozone treatment, a frame treatment, etc. This can improve the adhesion of other layers to the base layer 11. It is preferable that such a surface treatment is performed at least on the surface of the base layer 11 on which the picture-printed layer 15 is formed.

[0039] <<First shielding layer>> The first shielding layer 12 is a layer that blocks light that passes through the base layer 11 from the outside. The first shielding layer 12 is also a layer for blocking the darkness and blackness of the light-shielding layer 13. The first shielding layer 12 contains metal particles. Metal particles have a metallic luster and reflect light better than inorganic or organic pigments. Therefore, since the first shielding layer 12 contains metal particles, the brightness of the pattern of the pattern-printed layer 15 located closer to the outer surface 101 than the first shielding layer 12 is increased, and the color of the pattern becomes a clear color without dullness. This improves the design of the package 10.

[0040] The metal particles are preferably particles of a metal material that can provide a silver metallic luster. In this case, the metal particles are more preferably aluminum particles. When the metal particles are aluminum particles, the particle shape may be spherical, and is preferably scaly. When the aluminum particles are spherical, the particle size may be, for example, about 0.1 μm or more and 3.0 μm or less. When the aluminum particles are scaly, the average thickness of the aluminum particles may be about 0.01 μm or more and 0.30 μm or less, and the length of the aluminum particles may be about 1 μm or more and 10 μm or less.

[0041] The aspect ratio of the aluminum particles (average particle diameter / average thickness) may be about 25 or more and 100 or less, or about 30 or more and 50 or less. When the aspect ratio (average particle diameter / average thickness) is 25 or more, the aluminum particles are less likely to tilt in the first shielding layer 12. Therefore, the aluminum particles are more likely to be stacked in the thickness direction in the first shielding layer 12. As a result, multiple reflections can be generated between the aluminum particles, and the shielding properties against darkness and blackness of the light-shielding layer 13 can be improved. When the aspect ratio (average particle diameter / average thickness) is 100 or less, even if the aluminum particles are tilted, adjacent aluminum particles are less likely to come into contact with each other, and the microwave oven resistance can be improved.

[0042] The first shielding layer 12 may contain the above-mentioned metal particles and a binder resin, and may be formed on the second shielding layer 16 by printing using an ink containing various additives as necessary. The metal particle content of the ink may be about 5% by mass or more and 15% by mass or less. The binder resin content of the ink may be about 5% by mass or more and 15% by mass or less. A known ink called silver ink may be used for the first shielding layer 12.

[0043] The method of printing the ink may be a known printing method, such as gravure printing, offset printing, letterpress printing, or screen printing. The thickness of the first shielding layer 12 (amount of ink applied) depends on the content of metal particles in the ink, but can be a thickness that can ensure the necessary light-shielding properties to prevent the contents from deteriorating when a label 20 or the like described below is produced. Specifically, the thickness of the first shielding layer 12 may be, for example, about 0.5 μm or more and 5.0 μm or less. When the thickness of the first shielding layer 12 is 0.5 μm or more, the shielding properties against light transmitted through the base layer 11 from the outside and the darkness and blackness of the light-shielding layer 13 can be effectively improved. In addition, when the thickness of the first shielding layer 12 is 5.0 μm or less, the adhesion of the ink is maintained, and the decrease in lamination strength between layers adjacent to the first shielding layer 12 can be suppressed.

[0044] <<Light blocking layer>> The light-shielding layer 13 is a layer that blocks light transmitted through the base layer 11 from the outside. This light-shielding layer 13 is directly laminated on the first shielding layer 12. In addition, the light-shielding layer 13 is a layer different from the first shielding layer 12. Therefore, an interface exists between the light-shielding layer 13 and the first shielding layer 12. In this way, the interface exists between the light-shielding layer 13 and the first shielding layer 12, so that the black ink (black pigment) described later of the light-shielding layer 13 and the above-mentioned metal particles of the first shielding layer 12 can be suppressed from mixing. Therefore, the light-shielding property of the light-shielding layer 13 can be suppressed from being uneven, and the light-shielding property of the light-shielding layer 13 can be improved. In addition, since the black ink described later of the light-shielding layer 13 and the above-mentioned metal particles of the first shielding layer 12 can be suppressed from mixing, the decrease in laminate strength between the layers adjacent to the light-shielding layer 13 and the first shielding layer 12 can be suppressed. Furthermore, since it is possible to prevent the black ink of the light-shielding layer 13 (described later) from mixing with the metal particles of the first shielding layer 12, it is possible to enhance the concealing effect of the light-shielding layer 13 (prevention of the pattern from sinking) without being affected by the pattern. This allows the design of the package 10 to be improved.

[0045] The light-shielding layer 13 contains a black pigment. In this case, the content of the black pigment in the light-shielding layer 13 may be 4% or more and 50% or less. When the content of the black pigment in the light-shielding layer 13 is 4% or more, it is possible to effectively block light transmitted through the base layer 11 from the outside. Furthermore, when the content of the black pigment in the light-shielding layer 13 is 50% or less, it is possible to effectively prevent the appearance of the package 10 from becoming dark when viewed from the base layer 11 side.

[0046] The light-shielding layer 13 may contain black ink containing a black pigment. The black ink may contain at least one of a black organic pigment and an inorganic pigment, and a binder resin. As the black ink, a known ink containing various additives as necessary may be used. For example, black ink may be used.

[0047] Moreover, it is preferable that the light-shielding layer 13 does not contain metal particles, white pigments, or color pigments. In this case, it is preferable that the light-shielding layer 13 is composed only of black ink containing black pigments. This can suppress unevenness in the light-shielding properties of the light-shielding layer 13, and can enhance the light-shielding properties of the light-shielding layer 13. Furthermore, since the light-shielding layer 13 does not contain metal particles, white pigments, or color pigments, it is possible to suppress a decrease in the laminate strength between layers adjacent to the light-shielding layer 13, while enhancing the concealing effect of the light-shielding layer 13 (suppression of sinking of the pattern).

[0048] The ISO whiteness of the back surface of the light-shielding layer 13 may be 7 or less. The back surface of the light-shielding layer 13 refers to the surface of the light-shielding layer 13 that faces the inner surface 102 of the package 10. By setting the ISO whiteness of the back surface of the light-shielding layer 13 to 7 or less, it is possible to suppress a decrease in the light-shielding properties. This makes it possible to reduce the risk of deterioration of the contents.

[0049] In addition, the back surface of the light-shielding layer 13 is * The value may be 1 or more and 30 or less. * The value is L * a * b * It is a value defined by a color system and can be measured using a spectrophotometer (SpectroEye, manufactured by Sakata Inx Corporation). * By keeping the value at 30 or less, the decrease in light-blocking properties can be suppressed, and therefore the risk of deterioration of the contents can be reduced.

[0050] Furthermore, the total light transmittance of the light-shielding layer 13 may be 2% or less. This can improve the light-shielding property of the package 10. The total light transmittance can be measured using a haze meter (product name "HM-150", manufactured by Murakami Color Research Laboratory Co., Ltd., measuring diameter 20 mmφ) in accordance with JIS K7361-1:1997. Specifically, first, the light-shielding layer 13 is removed from the package 10, and three square test pieces with sides of 50 mm are cut out. Then, the test pieces are placed in the haze meter so as not to cause wrinkles or the like. At this time, the test pieces are placed in the haze meter so that the surface of the light-shielding layer 13 (the surface on the outer surface 101 side of the package 10) faces the light source. Next, the test pieces are kept in an environment with a temperature of 25°C and a relative humidity of 50% for 1 minute, and then the total light transmittance of the test pieces is measured in an environment with a temperature of 25°C and a relative humidity of 50%. The total light transmittance is measured for the three test pieces, and the average value is regarded as the total light transmittance of the light-shielding layer 13 .

[0051] The thickness of such a light-shielding layer 13 may be, for example, about 0.1 μm or more and 3.0 μm or less. When the thickness of the light-shielding layer 13 is 0.1 μm or more, it is possible to effectively improve the shielding property against light transmitted from the outside through the base material layer 11, etc. Also, when the thickness of the light-shielding layer 13 is 3.0 μm or less, it is possible to suppress blocking during printing processing and suppress sinking of the pattern.

[0052] <<Sealant layer>> The sealant layer 14 is a layer for bonding the packages 10 together, and is the innermost layer when, for example, a bag 70 described later is produced from the package 10. A material that melts and fuses by heat is used as a material for forming the sealant layer 14. Polyolefin resins such as polyethylene and polypropylene, polyethylene terephthalate (PET), polyacrylonitrile (PAN), etc. may be used as the sealant layer 14. Furthermore, a resin consisting of one or more of the above-mentioned resins may be used as the sealant layer 14. In this embodiment, the package 10 may be used as a bag 70 for retort. Therefore, when the package 10 is used as a bag 70 for retort, it is preferable to use a material with high heat resistance as the sealant layer 14 so that the adhesive strength between the sealant layers 14 does not decrease after the retort treatment. An example of a material with high heat resistance is polypropylene.

[0053] The thickness of the sealant layer 14 is not particularly limited, and may be about 30 μm or more and 100 μm or less, 80 μm or less, or 70 μm or less. The sealant layer 14 and another layer (e.g., intermediate layer 18) may be bonded by dry lamination via the second adhesive layer 19b.

[0054] <<Picture printing layer>> The picture-printed layer 15 is a layer for enhancing the design of the packaging body 10 and the label 20 described later. This picture-printed layer 15 is a layer on which a picture such as a predetermined character, figure, pattern, or color coding is formed by ink. A known ink may be used. For example, the ink may contain at least one of an organic pigment and an inorganic pigment, and a binder resin, and may further contain various additives as necessary. The picture-printed layer 15 can be formed, for example, on the base material layer 11 by a known printing method such as gravure printing, offset printing, letterpress printing, or screen printing.

[0055] In this embodiment, the picture-printed layer 15 is formed closer to the inner surface 102 than the base material layer 11. In other words, the picture-printed layer 15 does not form the outer surface 101 of the packaging body 10. This makes it possible to prevent the picture-printed layer 15 from disappearing due to friction or the like, and also effectively prevents tampering with the picture.

[0056] <<Second shielding layer>> The second shielding layer 16 is a layer for shielding the darkness or blackness of the light-shielding layer 13 and presenting a white background when the pattern of the pattern-printed layer 15 is viewed from the substrate layer 11 side. The second shielding layer 16 contains white ink. The white ink may contain at least one white pigment of an organic pigment or an inorganic pigment, and a binder resin. As the white ink, a known white ink containing various additives may be used as necessary.

[0057] The second shielding layer 16 can be formed by a known printing method, such as gravure printing, offset printing, letterpress printing, or screen printing.

[0058] The thickness of the second shielding layer 16 is preferably a thickness capable of shielding the darkness and blackness due to the color of the light-shielding layer 13, and may be, for example, about 0.1 μm or more and 5 μm or less. The thickness of the second shielding layer 16 can be adjusted when the second shielding layer 16 is printed.

[0059] <<Barrier layer>> The barrier layer 17 is a layer for suppressing the permeation of oxygen gas, water vapor, etc. By providing the packaging body 10 with the barrier layer 17, the permeation of oxygen gas, etc. can be suppressed, and weight loss and deterioration of the contents can be effectively suppressed.

[0060] The barrier layer 17 may be, for example, a vapor-deposited film of an inorganic substance or an inorganic oxide, or a layer made of a gas barrier resin such as an ethylene-vinyl alcohol copolymer, polyvinylidene chloride, polyvinyl alcohol, or MXD6, etc. The barrier layer 17 may also be formed by a combination of the above-mentioned vapor-deposited films or layers made of gas barrier resins.

[0061] In order to ensure the visibility of the contents, the barrier layer 17 is preferably transparent. In this case, a vapor deposition film of an inorganic oxide may be particularly preferably used as the barrier layer 17. The inorganic oxide forming the vapor deposition film may be an inorganic oxide that is transparent and has gas barrier properties against oxygen gas, water vapor, and the like. Examples of such inorganic oxides include oxides such as alumina (aluminum oxide), silicon oxide, magnesium oxide, calcium oxide, zirconium oxide, titanium oxide, boron oxide, hafnium oxide, and barium oxide. Among these, aluminum oxide and silicon oxide may be particularly preferably used in terms of gas barrier properties and production efficiency.

[0062] The surface of the barrier layer 17 may be subjected to a surface treatment such as corona treatment, ozone treatment, or frame treatment. This can improve the adhesion of other layers to the barrier layer 17. For example, when a picture-printed layer 15 is formed on the surface of the barrier layer 17, it is preferable that the surface treatment is performed on at least the surface of the barrier layer 17 on which the picture-printed layer 15 is formed.

[0063] <<Middle layer>> The intermediate layer 18 is made of a material having impact resistance and pinhole resistance. For example, a polyamide resin film such as a biaxially oriented nylon film may be used as the intermediate layer 18. The thickness of the intermediate layer 18 may be appropriately determined depending on the use and function of the package 10. The thickness of the intermediate layer 18 may be, for example, about 15 μm or more and 25 μm or less.

[0064] The intermediate layer 18 and another layer (eg, the sealant layer 14) may be bonded by dry lamination via the first adhesive layer 19a or the second adhesive layer 19b.

[0065] <<First adhesive layer 19a and second adhesive layer 19b>> The adhesive layers such as the first adhesive layer 19a and the second adhesive layer 19b are layers for bonding the base layer 11, the intermediate layer 18, the sealant layer 14, etc. to one another by a dry lamination method.

[0066] The adhesive constituting the adhesive layer may be one-component or two-component cured or non-cured vinyl, (meth)acrylic, polyamide, polyester, polyether, polyurethane, epoxy, rubber, polyvinyl acetate adhesive, ethyl acrylate, butyl, 2-ethylhexyl ester, or other homopolymers or copolymers of these with methyl methacrylate, acrylonitrile, styrene, or the like, polyacrylic acid ester adhesive, cyanoacrylate adhesive, ethylene copolymer adhesive made of copolymers of ethylene and vinyl acetate, ethyl acrylate, acrylic acid, methacrylic acid, or other monomers, cellulose adhesive, polyester adhesive, polyamide adhesive, polyimide adhesive, amino resin adhesive made of urea resin or melamine resin, phenol resin adhesive, epoxy adhesive, polyurethane adhesive, reactive (meth)acrylic acid adhesive, inorganic adhesive made of chloroprene rubber, nitrile rubber, styrene-butadiene rubber, silicone adhesive, alkali metal silicate, low melting point glass, or other adhesives may be used. For example, those mainly composed of a polyurethane resin which is a cured product of a polyfunctional isocyanate such as an aromatic polyisocyanate (e.g., tolylene diisocyanate, diphenylmethane diisocyanate, polymethylene polyphenylene polyisocyanate) or an aliphatic polyisocyanate (e.g., hexamethylene diisocyanate, xylylene diisocyanate) and a polyether polyol, polyester polyol, polyacrylate polyol, or other hydroxyl group-containing compound are preferred. These can form a thin film with excellent flexibility and bendability, and act as a coating film with flexibility and bendability, improving the suitability for processing such as lamination and printing.

[0067] The adhesive layer can be formed by applying the adhesive by, for example, a direct gravure roll coating method, a gravure roll coating method, a kiss coating method, a reverse roll coating method, a Fountain method, a transfer roll coating method, or other coating methods, and then drying the solvent.2 More than 10g / m 2 or less (dry state), 3 g / m 2 More than 5g / m 2 The thickness of the adhesive layer in a dry state may be 1.5 μm or more and 10 μm or less, or may be 3 μm or more and 5 μm or less.

[0068] In such a package 10, the maximum transmittance of light having a wavelength of 400 nm or more and 800 nm or less may be less than 3.0%. This can improve the light blocking property of the package 10. The transmittance can be measured using a haze meter (product name "HM-150", manufactured by Murakami Color Research Laboratory Co., Ltd., measuring diameter 20 mmφ) in accordance with JIS K7361-1:1997. Specifically, first, three square test pieces each having a side length of 50 mm are cut out from the package 10. The test pieces may include a pattern printed layer. Thereafter, the test pieces are placed in the haze meter so as not to cause wrinkles or the like. At this time, the test pieces are placed in the haze meter so that the substrate layer 11 side faces the light source side. Next, the test pieces are held in an environment at a temperature of 25°C and a relative humidity of 50% for 1 minute, and then the transmittance of the test pieces is measured in an environment at a temperature of 25°C and a relative humidity of 50%. The transmittance is measured for three test pieces, and the maximum value is regarded as the maximum transmittance of the package.

[0069] The packaging body 10 may have a layer structure other than the layer structures shown in Figures 1 to 6. For example, the packaging body 10 may have the following layer structures (1) to (16). (1) PET 12μm / white ink / metal particles / black ink / adhesive / ONY 15μm / adhesive / CPP 60μm (2) PET 12μm / barrier layer / white ink / metal particles / black ink / adhesive / PET 12μm / adhesive / CPP 60μm (3) PET 12μm / white ink / metal particles / black ink / adhesive / barrier layer / PET 12μm / adhesive / CPP 60μm (4) ONY 15 μm / white ink / metal particles / black ink / adhesive / barrier layer / PET 12 μm / adhesive / LLDPE 60 μm (5) PET 12μm / Picture printing layer / White ink / Adhesive / PET / Metal particles / Black ink / Adhesive / CPP 50μm (6) PET 12μm / white ink / metal particles / black ink / adhesive / barrier layer / vapor deposition layer / PET 12μm / adhesive / CPP 60μm (7) PET 12μm / white ink / metal particles / black ink / adhesive / PE 50μm (8) PET 12 μm / barrier layer / white ink / metal particles / black ink / adhesive / ONY 15 μm / adhesive / PE 50 μm (9) Picture printing layer (OP varnish) / KAM80g / adhesive / white ink / metal particles / black ink / PET12 / adhesive / EP30 (10) OPP / white ink / metal particles / black ink / adhesive / HSOPP (11) OPP 20μm / white ink / metal particles / black ink / adhesive / CPP 70μm (12) White ink / metal particles / black ink / KAM85g / anti-curl agent (13) PE 170 μm / adhesive / barrier layer / PET 12 μm / white ink / metal particles / black ink / adhesive / PE 170 μm (14) PE110μm / adhesive / PET12μm / white ink / metal particles / black ink / adhesive / barrier layer / PET12μm / adhesive / PE150μm (15) Metal particles / black ink / PE35μm / PE30μm / KAM78g / adhesive / barrier layer / PET12μm / AC / PE20μm / PE50μm / PE30μm / PE100μm (16)PE35μm / PE15μm / PE100μm / PE15μm / white ink / metal particles / black ink / barrier layer / PET12μm / PE15μm / EVOH15μm / PE20μm / PET12μm / PE15μm / PE70μm

[0070] Such a package 10 may be used to make, for example, a label 20, a lid material 30, a laminate tube 40 or a bag 70.

[0071] Next, the label 20, the lid member 30, the laminate tube 40, or the bag 70 that includes the packaging body 10 according to this embodiment will be described. First, the label 20 will be described.

[0072] 7, when a label 20 is produced from a package 10, the label 20 may be provided on the outside of, for example, a PET bottle 25. In this case, the label 20 may be provided on the outside of the PET bottle 25 so that an outer surface 101 of the package 10 faces away from the contents and an inner surface 102 faces the contents.

[0073] When the label 20 is produced from the packaging body 10, the packaging body 10 may have, for example, the layer configuration of the above-mentioned (10) to (12).

[0074] Next, the lid member 30 will be described.

[0075] 8, when the lid member 30 is made from the packaging body 10, the lid member 30 may be attached to, for example, a cup container 26 to seal the cup container 26. In this case, the lid member 30 may be attached to the cup container 26 so that the outer surface 101 of the packaging body 10 faces away from the contents and the inner surface 102 faces the contents.

[0076] When the lid member 30 is produced from the packaging body 10, the packaging body 10 may have, for example, the layer configurations (7) to (9) described above.

[0077] Next, the laminate tube 40 will be described.

[0078] 9, the laminate tube 40 includes a body tube 41, which is a laminate molded tube, and a head member 43 joined to one end 42 of the body tube 41. The body tube 41 has a generally cylindrical shape. This body tube 41 is formed from a packaging body 10. In this case, the body tube 41 may be configured such that an outer surface 101 of the packaging body 10 faces away from the contents and an inner surface 102 faces the contents.

[0079] The body tube 41 has a body seal portion 44 that joins the packages 10 together. This body seal portion 44 is formed along the longitudinal direction of the body tube 41. Such a body tube 41 may be obtained, for example, by rolling the packages 10 into a cylindrical shape, overlapping opposing ends, and joining them together, for example, by heat sealing.

[0080] The body tube 41 also has a bottom seal portion 45 that joins the packages 10 together. This bottom seal portion 45 is a portion where the packages 10 are joined together near an opening (not shown) formed at the other end 46 of the body tube 41 after an appropriate amount of content C is filled into the package through the opening.

[0081] The head member 43 has a shoulder portion 47 and a mouth portion 48. A cap 49 is attached to the mouth portion 48. The head member 43 is molded by, for example, compression molding. The head member 43 is made of, for example, a resin material such as high density polyethylene (HDPE).

[0082] When the laminate tube 40 (body tube 41) is produced from the packaging body 10, the packaging body 10 may have, for example, the layer configurations (13) to (16) described above.

[0083] Next, a bag 70 including the packaging body 10 according to this embodiment will be described.

[0084] 10, the bag 70 may be a standing pouch formed using the above-mentioned packaging body 10. In this case, the bag 70 may be configured such that the outer surface 101 of the packaging body 10 faces away from the contents and the inner surface 102 faces the contents.

[0085] The bag 70 includes a pair of side seal portions 71, a bottom seal portion 72, and an upper seal portion 73. Of the pair of side seal portions 71, one side seal portion 71 is separated into an upper portion and a lower portion via an unsealed portion 74. A protruding seal portion 75 is formed to protrude into the storage space so as to be connected to the upper portion and the lower portion of the side seal portion 71. The unsealed portion 74 is formed from the outer edge of the bag 70 toward the storage space, and separates the unsealed portion 74 from the storage space. The unsealed portion 74 is formed to protrude toward the storage space beyond the inner edge of one side seal portion 71.

[0086] In this bag 70, a steam escape mechanism is formed by the protruding sealed portion 75 and the unsealed portion 74. When the bag 70 is heated in a microwave oven, the protruding sealed portion 75 peels back and reaches the unsealed portion 74, allowing steam to escape from the unsealed portion 74, thereby reducing the internal pressure of the bag 70. Note that the unsealed portion 74 may have a through portion such as a hole or a cut.

[0087] The bag 70 may be produced by folding the above-mentioned packaging body 10 in two or three. The bag 70 may be produced by preparing two of the above-mentioned packaging bodies 10 and overlapping the surface of the sealant layer 14 of the front packaging body 10 with the surface of the sealant layer 14 of the back packaging body 10 facing each other. The bag 70 may be produced as a gusset-type packaging bag by inserting the folded-over packaging body 10 between the front packaging body 10 and the back packaging body 10 and heat sealing the folded-over packaging body 14. The bag 70 may be produced as a bag of various shapes by adopting a heat seal type such as a side seal type, a two-sided seal type, a three-sided seal type, a four-sided seal type, an envelope seal type, a grooving seal type (pillow seal type), a pleated seal type, a flat bottom seal type, or a square bottom seal type.

[0088] In the above, the heat sealing can be performed by a known method such as bar sealing, rotary roll sealing, belt sealing, impulse sealing, high frequency sealing or ultrasonic sealing.

[0089] When the bag 70 is produced from the packaging body 10, the packaging body 10 may have, for example, the layer configurations (1) to (6) described above.

[0090] Next, a method for producing the packaging body 10 will be described.

[0091] For example, when producing the packaging body 10 shown in Fig. 1, first, a base material layer 11 is prepared. As the base material layer 11, for example, a polyethylene terephthalate film may be used.

[0092] Next, the second shielding layer 16 is printed on the base material layer 11. The second shielding layer 16 is printed using white ink.

[0093] The first shielding layer 12 is then printed on the second shielding layer 16. The first shielding layer 12 is printed using an ink containing metal particles.

[0094] Next, the light-shielding layer 13 is printed on the first shielding layer 12. The light-shielding layer 13 is printed using black ink containing a black pigment.

[0095] Furthermore, an intermediate layer 18 and a sealant layer 14 are prepared. For example, a polyethylene terephthalate film provided with a barrier layer 17 (a vapor deposition film of an inorganic oxide) may be used as the intermediate layer 18. For example, a polyethylene film or the like may be used as the sealant layer 14.

[0096] Next, the base layer 11, the intermediate layer 18 and the sealant layer 14 are laminated together by a dry lamination method, thereby obtaining the package 10 shown in FIG.

[0097] As described above, according to the present embodiment, the packaging body 10 includes the base layer 11, the first shielding layer 12, the light-shielding layer 13, and the sealant layer 14, which are laminated in this order. The first shielding layer 12 contains metal particles. The light-shielding layer 13 contains a black pigment. In this way, the packaging body 10 includes the first shielding layer 12 containing metal particles and the light-shielding layer 13 containing a black pigment, and thus the packaging body 10 can be provided with light-shielding properties and excellent metallic luster. In addition, according to the present embodiment, the metal particles of the first shielding layer 12 and the black pigment of the light-shielding layer 13 do not mix with each other. This makes it possible to prevent the packaging body 10 from becoming dark. In this way, according to the present embodiment, the light-shielding properties and design of the packaging body 10 can be improved.

[0098] In addition, by configuring the first shielding layer 12 containing metal particles and the light-shielding layer 13 containing black pigment as different layers, the laminate strength of the packaging body 10 can be improved, making it more suitable for applications such as heating in a microwave oven.

[0099] Furthermore, according to the present embodiment, the light-shielding layer 13 does not contain metal particles, white pigments, or color pigments. This makes it possible to suppress unevenness in the light-shielding properties of the light-shielding layer 13 and to enhance the light-shielding properties of the light-shielding layer 13. Furthermore, since the light-shielding layer 13 does not contain metal particles, white pigments, or color pigments, it is possible to suppress a decrease in laminate strength between layers adjacent to the light-shielding layer 13 and enhance the concealing effect of the light-shielding layer 13 (suppression of sinking of the pattern).

[0100] Moreover, according to this embodiment, the packaging body 10 further includes a picture-printed layer 15 provided between the base material layer 11 and the first shielding layer 12. This can improve the design of the packaging body 10.

[0101] Moreover, according to this embodiment, the packaging body 10 further includes a second shielding layer 16 provided between the base material layer 11 and the first shielding layer 12. The second shielding layer 16 also contains white ink. This allows the second shielding layer 16 to shield the darkness or blackness of the light-shielding layer 13. Furthermore, when the pattern of the picture-printed layer 15 is viewed from the base material layer 11 side, it can present a white color as a background against the packaging body 10.

[0102] Moreover, according to this embodiment, the packaging body 10 further includes a barrier layer 17 provided between the base material layer 11 and the first shielding layer 12. This can improve the barrier properties of the packaging body 10 against oxygen gas, water vapor, and the like.

[0103] Furthermore, according to this embodiment, the packaging body 10 further includes an intermediate layer 18 provided between the light-shielding layer 13 and the sealant layer 14. This can increase the rigidity of the packaging body 10, and can also increase the impact resistance and pinhole resistance. EXAMPLES

[0104] Next, a specific example of the above embodiment will be described.

[0105] (Example A1) First, a bag packaging body was produced by preparing a polyethylene terephthalate film (thickness: 12 μm) as a base layer.

[0106] Next, a second shielding layer was printed on the base layer using white ink.

[0107] Next, the first shielding layer was printed on the second shielding layer using an ink containing metal particles.

[0108] Next, a light-shielding layer was printed on the first shielding layer using black ink so that the content of black pigment was 30%.

[0109] In addition, a nylon film (thickness: 15 μm) was prepared as an intermediate layer, and an unstretched polypropylene film (thickness: 60 μm) was prepared as a sealant layer.

[0110] Next, the base layer on which the second shielding layer, the first shielding layer and the light shielding layer were laminated, the intermediate layer and the sealant layer were laminated together by a dry lamination method. The layer structure of the resulting package is as follows: PET / white ink / metal particles / black ink / adhesive / ONY / adhesive / CPP In the above, "PET" means polyethylene terephthalate film (hereinafter the same), "ONY" means nylon film (hereinafter the same), and "CPP" means unstretched polypropylene film (hereinafter the same).

[0111] (Example A2) A bag packaging body was produced in the same manner as in Example A1, except that a barrier layer was provided between the base layer and the second shielding layer, the barrier layer was an alumina vapor deposition film, and a polyethylene terephthalate film (thickness 12 μm) was used as the intermediate layer. The layer structure of the resulting package is as follows: PET / barrier layer / white ink / metal particles / black ink / adhesive / PET / adhesive / CPP

[0112] (Example A3) A bag packaging body was produced in the same manner as in Example A1, except that a barrier layer was provided between the light-shielding layer and the intermediate layer, the barrier layer was an alumina vapor deposition film, and a polyethylene terephthalate film (thickness 12 μm) was used as the intermediate layer. The layer structure of the resulting package is as follows: PET / white ink / metal particles / black ink / adhesive / barrier layer / PET / adhesive / CPP

[0113] (Example A4) A bag packaging body was produced in the same manner as in Example A1, except that a nylon film (thickness 15 μm) was used as the base layer, a barrier layer was provided between the light-shielding layer and the intermediate layer, the barrier layer was an alumina vapor deposition film, a polyethylene terephthalate film (thickness 12 μm) was used as the intermediate layer, a linear low-density polyethylene film was used as the sealant layer, and black ink with a black pigment content of 4% was used as the light-shielding layer. The layer structure of the resulting package is as follows: ONY / white ink / metal particles / black ink / adhesive / barrier layer / PET / adhesive / LLDPE In the above, "LLDPE" means linear low density polyethylene film (hereinafter the same).

[0114] (Example A5) A polyethylene terephthalate film (thickness: 12 μm) was prepared as a base layer for the bag packaging body.

[0115] Next, a pattern print layer was printed on the base layer.

[0116] Next, a second shielding layer was printed on the pattern printed layer using white ink.

[0117] In addition, a nylon film (thickness: 15 μm) was prepared as an intermediate layer.

[0118] Next, a light-shielding layer was printed on the intermediate layer using black ink so that the content of black pigment was 30%.

[0119] Next, a first shielding layer was printed on the light-shielding layer using ink containing metal particles.

[0120] In addition, an unstretched polypropylene film (thickness: 60 μm) was prepared as a sealant layer.

[0121] Next, the base layer on which the picture print layer and the second shielding layer were laminated, the intermediate layer on which the light-shielding layer and the first shielding layer were laminated, and the sealant layer were laminated together by a dry lamination method. The layer structure of the resulting package is as follows: PET / Picture printing layer / White ink / Adhesive / PET / Metal particles / Black ink / Adhesive / CPP

[0122] (Example A6) A bag packaging body was produced in the same manner as in Example A1, except that a first barrier layer and a second barrier layer were provided between the light-shielding layer and the intermediate layer, the first barrier layer was a hybrid coating layer made of an organic material and an inorganic material, the second barrier layer was an alumina vapor deposition film formed on the intermediate layer, a polyethylene terephthalate film (thickness 12 μm) was used as the intermediate layer, and black ink with a black pigment content of 43% was used as the light-shielding layer. The layer structure of the resulting package is as follows: PET / white ink / metal particles / black ink / adhesive / 1st barrier layer / 2nd barrier layer / PET / adhesive / CPP

[0123] Example B1 Next, a packaging body for the lid material was produced using a polyethylene terephthalate film (thickness: 12 μm) as a base layer.

[0124] Next, a second shielding layer was printed on the base layer using white ink.

[0125] Next, the first shielding layer was printed on the second shielding layer using an ink containing metal particles.

[0126] Next, a light-shielding layer was printed on the first shielding layer using black ink so that the content of black pigment was 30%.

[0127] In addition, a polyethylene film (thickness: 50 μm) was prepared as a sealant layer.

[0128] Next, the base layer on which the second shielding layer, the first shielding layer and the light-shielding layer were laminated, and the sealant layer were laminated together by a dry lamination method. The layer structure of the resulting package is as follows: PET / white ink / metal particles / black ink / adhesive / PE In the above, "PE" means polyethylene film (hereinafter the same).

[0129] (Example B2) A packaging body for a lid material was prepared in the same manner as in Example B1, except that a barrier layer was provided between the base material layer and the second shielding layer, the barrier layer was an alumina vapor deposition film, an intermediate layer was provided between the light-shielding device sealant layer, and a nylon film (thickness 15 μm) was used as the intermediate layer. The layer structure of the resulting package is as follows: PET / barrier layer / white ink / metal particles / black ink / adhesive / ONY / adhesive / PE

[0130] (Example B3) As the base layer of the packaging for the lid material, 80 g / m of fine paper 2 (KAM) was prepared.

[0131] Next, a pattern print layer was printed on the outer surface side of the base material layer, and OP varnish was applied onto the pattern print layer.

[0132] In addition, a polyethylene terephthalate film (thickness: 12 μm) was prepared as an intermediate layer.

[0133] Next, a light-shielding layer was printed on the intermediate layer using black ink so that the content of black pigment was 30%.

[0134] Next, a first shielding layer was printed on the light-shielding layer using ink containing metal particles.

[0135] Next, a second shielding layer was printed on the first shielding layer using white ink.

[0136] In addition, an easily peelable unstretched polypropylene film (thickness: 30 μm) was prepared as a sealant layer.

[0137] Next, the base layer on which the picture print layer was laminated, the intermediate layer on which the second shielding layer, the light shielding layer and the first shielding layer were laminated, and the sealant layer were laminated together by a dry lamination method. The layer structure of the resulting package is as follows: Pattern printing layer (OP varnish) / KAM / adhesive / white ink / metal particles / black ink / PET / adhesive / easy peeling CPP In the above, "easily peelable CPP" means an unstretched polypropylene film having easily peelable properties (the same applies below).

[0138] (Example C1) Next, a packaging material for labels was produced using a biaxially oriented polypropylene film (thickness: 20 μm) as a base layer.

[0139] Next, a second shielding layer was printed on the base layer using white ink.

[0140] Next, the first shielding layer was printed on the second shielding layer using an ink containing metal particles.

[0141] Next, a light-shielding layer was printed on the first shielding layer using black ink so that the content of black pigment was 30%.

[0142] In addition, a biaxially oriented polypropylene film (thickness: 40 μm) having heat sealability was prepared as a sealant layer.

[0143] Next, the base layer on which the second shielding layer, the first shielding layer and the light-shielding layer were laminated, and the sealant layer were laminated together by a dry lamination method. The layer structure of the resulting package is as follows: OPP / white ink / metal particles / black ink / adhesive / HSOPP In the above, "OPP" means biaxially oriented polypropylene film (hereinafter the same), and "HSOPP" means biaxially oriented polypropylene film with heat sealability (hereinafter the same).

[0144] (Example C2) A bag packaging body was produced in the same manner as in Example C1, except that an unstretched polypropylene film (thickness: 70 μm) was used as the sealant layer. The layer structure of the resulting package is as follows: OPP / white ink / metal particles / black ink / adhesive / CPP

[0145] (Example C3) As the base layer of the packaging for the label, 80 g / m of wood-free paper 2 (KAM) was prepared.

[0146] Next, a light-shielding layer was printed on the base layer using black ink so that the content of black pigment was 30%.

[0147] Next, a first shielding layer was printed on the light-shielding layer using ink containing metal particles.

[0148] Next, a second shielding layer was printed on the first shielding layer using white ink.

[0149] In addition, an anti-curl agent was applied to the surface of the base layer opposite to the surface on which the light-shielding layer was printed. The layer structure of the resulting package is as follows: White ink / metal particles / black ink / KAM / anti-curl agent

[0150] (Example D1) Next, a package for a laminate tube was produced using a polyethylene film (thickness: 170 μm) as a base layer.

[0151] In addition, as an intermediate layer, a polyethylene terephthalate film (thickness: 12 μm) on which an alumina vapor deposition film (barrier layer) was formed was prepared.

[0152] Next, a second shielding layer was printed on the intermediate layer using white ink.

[0153] Next, the first shielding layer was printed on the second shielding layer using an ink containing metal particles.

[0154] Next, a light-shielding layer was printed on the first shielding layer using black ink so that the content of black pigment was 30%.

[0155] In addition, a polyethylene film (thickness: 170 μm) was prepared as a sealant layer.

[0156] Next, the base layer, the intermediate layer in which the second shielding layer, the first shielding layer and the light-shielding layer were laminated, and the sealant layer were laminated together by a dry lamination method. The layer structure of the resulting package is as follows: PE / adhesive / barrier layer / PET / white ink / metal particles / black ink / adhesive / PE

[0157] (Example D2) A polyethylene film (thickness: 110 μm) was prepared as a base layer of a package for a laminate tube.

[0158] In addition, a polyethylene terephthalate film (thickness: 12 μm) was prepared as the first intermediate layer.

[0159] Next, a second shielding layer was printed on the first intermediate layer using white ink.

[0160] Next, the first shielding layer was printed on the second shielding layer using an ink containing metal particles.

[0161] Next, a light-shielding layer was printed on the first shielding layer using black ink so that the content of black pigment was 30%.

[0162] In addition, as a second intermediate layer, a polyethylene terephthalate film (thickness: 12 μm) on which an alumina vapor deposition film (barrier layer) was formed was prepared.

[0163] Furthermore, a polyethylene film (thickness: 150 μm) was prepared as a sealant layer.

[0164] Next, the base layer, the first intermediate layer in which the second shielding layer, the first shielding layer and the light-shielding layer were laminated, the second intermediate layer and the sealant layer were laminated together by dry lamination. The layer structure of the resulting package is as follows: PE / adhesive / PET / white ink / metal particles / black ink / adhesive / barrier layer / PET / adhesive / PE

[0165] (Example D3) As the base layer of the packaging for the laminated tube, 80g / m2 of fine paper 2 (KAM) was prepared.

[0166] In addition, as an intermediate layer, a polyethylene terephthalate film (thickness: 12 μm) on which an alumina vapor deposition film (barrier layer) was formed was prepared.

[0167] Next, the base material layer and the intermediate layer having the barrier layer laminated thereon were laminated to each other by a dry lamination method to produce a first intermediate of the packaging body. The layer structure of the first intermediate body of the obtained package was as follows: KAM / adhesive / barrier layer / PET

[0168] Next, a polyethylene resin as an adhesive layer and a polyethylene resin as an outer sealant layer were simultaneously extruded onto the base layer of the first intermediate body, thus producing a second intermediate body for the packaging body. The layer structure of the obtained second intermediate body of the package is as follows. PE / PE / KAM / adhesive / barrier layer / PET

[0169] Next, a polyethylene resin as an adhesive layer and a polyethylene resin as an inner sealant layer (sealant layer) were simultaneously extruded onto the middle layer of the second intermediate body through the anchor coat layer, thus producing a third intermediate body of the packaging body. The layer structure of the obtained third intermediate body of the package was as follows. PE / PE / KAM / adhesive / barrier layer / PET / AC / PE / PE / PE / PE In the above, "AC" means an anchor coat layer (hereinafter the same).

[0170] A light-shielding layer was then printed on the outer sealant layer using a black ink containing a black pigment.

[0171] Next, a first shielding layer was printed on the light-shielding layer using ink containing metal particles. The layer structure of the resulting package is as follows: Metal particles / black ink / PE / PE / KAM / adhesive / barrier layer / PET / AC / PE / PE / PE / PE

[0172] (Example D4) As a base layer of a package for a laminate tube, a polyethylene terephthalate film (thickness 12 μm) on which a silica vapor deposition film (barrier layer) was formed was prepared.

[0173] Next, a first shielding layer was printed on the barrier layer using an ink containing metal particles.

[0174] Next, a light-shielding layer was printed on the first shielding layer using black ink containing a black pigment, thereby producing a first intermediate package. The layer structure of the first intermediate body of the obtained package was as follows: PET / barrier layer / metal particles / black ink

[0175] Next, a linear low-density polyethylene film (thickness: 150 μm) was prepared as an inner sealant layer.

[0176] Next, the first intermediate and the inner sealant layer were laminated together by dry lamination to produce a second intermediate of the package. The layer structure of the obtained second intermediate body of the package is as follows. PET / barrier layer / metal particles / black ink / adhesive / PE

[0177] Next, a linear low-density polyethylene film (thickness 150 μm) containing an antistatic agent was prepared as an outer sealant layer.

[0178] Next, the outer sealant layer and the second intermediate body were laminated together by dry lamination to produce a package. The layer structure of the resulting package is as follows: PE / adhesive / PET / barrier layer / metal particles / black ink / adhesive / PE

[0179] Comparative Example 1 A bag packaging body was produced in the same manner as in Example A1, except that black ink having a black pigment content of 2.4% was used for the light-shielding layer. The layer structure of the resulting package is as follows: PET / white ink / metal particles / black ink / adhesive / ONY / adhesive / CPP Comparative Example 2 As a substrate layer, a polyethylene terephthalate film (thickness: 12 μm) was prepared.

[0180] Next, the first and second shielding layers were printed on the base layer using white ink.

[0181] Next, a first shielding layer was printed on the first second shielding layer using an ink containing metal particles.

[0182] Next, a second shielding layer was printed on the first shielding layer using white ink.

[0183] In addition, a polyethylene terephthalate film (thickness 12 μm) provided with a first barrier layer and a second barrier layer was prepared as an intermediate layer. At this time, the first barrier layer was a hybrid coating layer made of an organic material and an inorganic material, and the second barrier layer was an alumina vapor deposition film formed on the first barrier layer.

[0184] Furthermore, an unstretched polypropylene film (thickness: 60 μm) was prepared as a sealant layer.

[0185] Next, the base layer on which the first second shielding layer, the first shielding layer and the second second shielding layer were laminated, the intermediate layer on which the first barrier layer and the second barrier layer were laminated, and the sealant layer were laminated together by a dry lamination method. The layer structure of the resulting package is as follows: PET / white ink / metal particles / white ink / adhesive / 1st barrier layer / 2nd barrier layer / PET / adhesive / CPP

[0186] Comparative Example 3 A package was prepared in the same manner as in Comparative Example 2, except that a second shielding layer was printed on the first second shielding layer, a light-shielding layer was printed on the second second shielding layer using gray ink, and the black pigment content of the gray ink was 2%. The layer structure of the resulting package is as follows: PET / white ink / white ink / gray ink / adhesive / 1st barrier layer / 2nd barrier layer / PET / adhesive / CPP

[0187] Comparative Example 4 A packaging body was produced in the same manner as in Comparative Example 2, except that a second shielding layer was printed on the base material layer using white ink, and a light-shielding layer was printed on the second shielding layer using black ink containing a black pigment. The layer structure of the resulting package is as follows: PET / white ink / black ink / adhesive / first barrier layer / second barrier layer / PET / adhesive / CPP

[0188] Comparative Example 5 A package was produced in the same manner as in Comparative Example 2, except that the first shielding layer was not provided. The layer structure of the resulting package is as follows: PET / white ink / white ink / adhesive / 1st barrier layer / 2nd barrier layer / PET / adhesive / CPP

[0189] Comparative Example 6 A package was produced in the same manner as in Comparative Example 2, except that the first shielding layer and the second shielding layer were not provided. The layer structure of the resulting package is as follows: PET / white ink / adhesive / 1st barrier layer / 2nd barrier layer / PET / adhesive / CPP

[0190] Comparative Example 7 As the substrate layer, a nylon film (thickness: 15 μm) was prepared.

[0191] Next, a second shielding layer was printed on the base layer using white ink.

[0192] In addition, a polyethylene terephthalate film (thickness: 12 μm) provided with a barrier layer was prepared as an intermediate layer. At this time, the barrier layer was an aluminum vapor deposition film formed on the intermediate layer.

[0193] Furthermore, a polyethylene film (thickness: 60 μm) was prepared as a sealant layer.

[0194] Next, the base layer on which the second shielding layer was laminated, the intermediate layer on which the barrier layer was laminated, and the sealant layer were laminated together by a dry lamination method. The layer structure of the resulting package is as follows: ONY / white ink / adhesive / barrier layer / PET / adhesive / PE

[0195] Comparative Example 8 As a substrate layer, a polyethylene terephthalate film (thickness: 12 μm) was prepared.

[0196] Next, a second shielding layer was printed on the base layer using white ink.

[0197] In addition, an aluminum foil (thickness: 7 μm) was prepared as a barrier layer.

[0198] Furthermore, a polyethylene film (thickness: 60 μm) was prepared as a sealant layer.

[0199] Next, the base layer on which the second shielding layer was laminated, the barrier layer, and the sealant layer were laminated together by a dry lamination method. The layer structure of the resulting package is as follows: PET / white ink / adhesive / aluminum foil / adhesive / PE

[0200] (1) Transmittance measurement test Next, a transmittance measurement test was performed. At this time, the maximum transmittance of light having a wavelength of 400 nm or more and 800 nm or less was measured. The transmittance was measured using a haze meter (product name "HM-150", manufactured by Murakami Color Research Laboratory Co., Ltd., measuring diameter 20 mmφ) in accordance with JIS K7361-1:1997. Specifically, first, three square test pieces with a side length of 50 mm were cut out from each of the packages of Example A1 to Comparative Example 8. Then, the test pieces were placed in the haze meter so that wrinkles and the like would not occur. At this time, the test pieces were placed in the haze meter so that the base layer side was the light source side. Next, the test pieces were held in an environment of a temperature of 25°C and a relative humidity of 50% for 1 minute, and then the transmittance of the test pieces was measured in an environment of a temperature of 25°C and a relative humidity of 50%. In this way, the transmittance was measured for three test pieces for each of the packages of Example A1 to Comparative Example 8. The maximum value of the measured transmittance for each of the packages of Example A1 to Comparative Example 8 was taken as the maximum value of the transmittance for the packages of Example A1 to Comparative Example 8.

[0201] (2) Appearance evaluation test Next, an appearance evaluation test was performed. At this time, the concealment ability of the contents was confirmed. When confirming the concealment ability of the contents, curry (Meiji Otoko no Gokumai Kuro Curry) was put into the bag and sealed, and the appearance was visually confirmed. The bags were made from the packages of Examples A1 to A6, Examples D1 to D4, and Comparative Examples 1 to 8.

[0202] In addition, the design of the packaging was checked. When checking the design, the whiteness (brightness (L * The whiteness of the appearance was measured using a spectrophotometer (SpectroEye (product name), manufactured by Sakata Inx Corporation). The presence or absence of the metallic design was confirmed by visual inspection with a light shining on the base layer side to see if there was a beautiful metallic design.

[0203] (3) Metal detection evaluation Next, metal detection evaluation was performed. First, test pieces made of iron (Fe) balls (φ1.5 mm) and stainless steel (SUS304) balls (φ2.5 mm) were prepared. Next, the test pieces were wrapped in packaging materials of each specification, and a metal detector (MS-3147-4508-4, manufactured by Ishida Co., Ltd.) was used to check whether they could be detected.

[0204] The above results are shown in Tables 1 and 2.

[0205] [Table 1]

[0206] [Table 2]

[0207] In the "Concealment" column of Table 1 above, "excellent" means that it was completely impossible to determine whether or not there was content. "good" means that it was possible to determine whether or not there was content, but it was not possible to determine the shape or volume of the content. "poor" means that it was possible to determine both the shape and volume of the content. "bad" means that it was possible to determine even the liquid level of the content.

[0208] In addition, in the "Lightness" column of Table 1 above, "excellent" is L * The value was 85 or more. "Good" means that the L * It means that the value was between 73 and 85. * This means the value was below 73 or could not be measured.

[0209] In the "Metallic" column in Table 2, "good" means that the product had a metallic design, and "bad" means that the product did not have a metallic design.

[0210] In the "Metal Detection" column in Table 2, "good" means that both the iron ball and the stainless steel ball were detectable, and "bad" means that at least one of the iron ball and the stainless steel ball was not detectable.

[0211] Furthermore, in the "Environmental Impact" column of Table 2 above, "excellent" means that the package did not contain any of metal foil, metal vapor deposition film, or metal particles. "good" means that the package contained a metal vapor deposition film or metal particles, but did not contain metal foil. "bad" means that the package contained metal foil.

[0212] As a result, as shown in Tables 1 and 2, the packages according to Examples A1 to D4 obtained good results in all items. Therefore, it was found that the packages according to the present embodiment can improve the light blocking property, design property, etc. of the packages.

[0213] It is also possible to combine the multiple components disclosed in the above embodiments as necessary, or to delete some of the components disclosed in the above embodiments. [Explanation of symbols]

[0214] 10 Packaging 11 Base material layer 12 1st shielding layer 13 Light blocking layer 14 Sealant layer 15 Pattern printing layer 16 Second shielding layer 17 Barrier Layer 18 Middle Class 20 Label 30 Lid material 40 Laminated tube 70 bags

Claims

1. The film has a base layer, a first shielding layer, a light-shielding layer, and a sealant layer laminated in this order; the first shielding layer includes metal particles; The packaging body, wherein the light-shielding layer contains a black pigment.

2. The packaging body according to claim 1 , wherein the content of the black pigment in the light-shielding layer is 4% or more and 50% or less.

3. The package of claim 1 , wherein the light-blocking layer does not contain metal particles, white pigments, or color pigments.

4. The packaging body according to claim 1 , further comprising a picture-printed layer provided between the base material layer and the first shielding layer.

5. The packaging body according to claim 1 , further comprising a second shielding layer disposed between the base material layer and the first shielding layer, the second shielding layer including a white ink.

6. The package of claim 1 , further comprising a barrier layer disposed between the substrate layer and the first shielding layer.

7. 2. The package according to claim 1, wherein the maximum transmittance of light having a wavelength of 400 nm or more and 800 nm or less, measured in accordance with JIS K7361-1:1997, is less than 3.0%.

8. The package according to claim 1 , further comprising an intermediate layer disposed between the light-shielding layer and the sealant layer.

9. The packaging body according to claim 1 , wherein the first shielding layer has a thickness of 0.5 μm or more and 5.0 μm or less.

10. The packaging body according to claim 1 , wherein the light-shielding layer has a thickness of 0.1 μm or more and 3.0 μm or less.

11. A label comprising a package according to any one of claims 1 to 10.

12. A lid material comprising a packaging body according to any one of claims 1 to 10.

13. A laminate tube comprising the packaging body according to any one of claims 1 to 10.

14. A packaging bag comprising the packaging body according to any one of claims 1 to 10.

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