JPH10305513A - Shading lamination material and packaging container employing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To have a sufficient shading property and protection property of a content, and manufacture simply without raising manufacturing cost by forming a base material film layer and a heat sealing resin layer with laminated material, and providing a continuous print pattern in either layer by print ink. SOLUTION: A shading laminated material A is formed with a layer constitution made of laminated material of a base material film layer 1 and heat sealing resin layer 2, and provided with a continuous print film 3 by print ink in either layer 1, 2. Herein, for such a base film, a film or sheet is employed, such as polyester resin having strength, rigidity, and heat resistance, and for heat sealing resin, there is given resin for use such as low density polyethylene that melts by heat and welded mutually. Also, used for a print ink of the continuous print film 3 is a colored ink composition made up of having binder resin as a main component of vehicle, giving a coloring agent such as a dye and pigment thereto, and adding a desired assistant to then be kneaded by a solvent and diluent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light-shielding laminate and a packaging container using the same.
The present invention relates to a light-shielding laminate that blocks light that affects the quality of contents and the like and is excellent in protection of contents, and a packaging container using the same.

[0002]

2. Description of the Related Art Various types of packaging containers suitable for filling and packaging various articles such as industrial products such as foods and drinks, detergents, pharmaceuticals, and others have been developed and proposed. Thus, in recent years, for example, confectionery or snack foods containing a large amount of fats and oils, foods and drinks such as frozen foods cooked with fats and oils, processed foods and the like, or industrial products such as liquid detergents, softeners, shampoos, and rinses, chemicals or Pharmaceuticals such as drugs and drinks, etc., may be affected by light and their quality etc. may change, impairing the deterioration of the contents, etc. Therefore, the filling and packaging of these products Are usually filled and packaged using a light-shielding packaging material. By the way, as the packaging material having the above-mentioned light-shielding properties, a paper base material such as ball paper and kraft paper, or an aluminum foil or an aluminum vapor-deposited film or the like is generally used. .

[0003]

However, the packaging material having the above-mentioned light-shielding properties may be excellent in light-shielding properties, but may be inferior in other respects. It cannot be said to be satisfactory. For example, when a paper substrate or the like is used, the light-shielding property is the best, but the packaging container is inferior in flexibility and bulky, and the handling is inconvenient. There is. In addition, when the above-mentioned aluminum foil is used, it lacks flexibility as a material for soft packaging, and the production cost is increased. For this reason, there is a tendency to use an aluminum vapor-deposited resin film instead of the aluminum foil. Things. However, while the total light transmittance of the aluminum foil is 0.0%, the thickness of the vapor-deposited resin film of the aluminum vapor-deposited resin film is usually 20%.
In the case of about 0 to 400 °, the total light transmittance is 1.5 to 5.0.
%, Which is inferior to aluminum foil in light-shielding properties. In addition, the aluminum vapor-deposited resin film has an ultraviolet ray region at each wavelength of 310 to 380 nm.
In order to exhibit a transmittance of 1.0 to 2.5%, ultraviolet rays reach the inside of the package, and cause deterioration or deterioration of the contents. To reduce the above permeability,
Attempts have been made to increase the thickness of the vapor-deposited film of the aluminum-deposited resin film, but this is not desirable because it increases the manufacturing cost. Therefore, the present invention provides a light-shielding laminate having sufficient light-shielding properties, excellent suitability for protecting the contents thereof, and whose production is simple and does not increase the production cost, and a container for packaging. To provide.

[0004]

As a result of various studies to solve the above problems, the present inventor has paid attention to the fact that a continuous printed film made of printing ink has a light-shielding property. And a heat-sealing resin layer, and a laminated material is formed by providing a continuous printing film of printing ink on one of the layers constituting the laminated material. The laminated material was used to make a bag, and a packaging container was manufactured. Thus, the content was filled and packaged in the packaging container to produce a packaged product. It has been found that it is possible to produce a light-shielding laminate having excellent suitability for protecting the contents thereof, which is easy to produce and does not increase the production cost, and a packaging container and the like using the same. Thus, the present invention has been completed.

That is, the present invention comprises a laminated material having at least a base film layer and a heat-sealing resin layer laminated thereon, and further comprising the step of forming a continuous layer by printing ink on one of the layers constituting the laminated material. The present invention relates to a light-shielding laminated material provided with a printed film, and a packaging container using the same.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below. First, the light-shielding laminated material according to the present invention and the configuration of a packaging container using the same will be described with reference to the drawings with reference to specific examples.
2 and 3 are schematic cross-sectional views showing an example of the layer configuration of the light-shielding laminate according to the present invention, and FIG. 4 is formed by using the light-shielding laminate shown in FIG. FIG. 5 is a schematic perspective view showing a configuration of a packaging container according to the present invention, and FIG.
FIG. 5 is a schematic perspective view illustrating a configuration of a packaged product in which contents are filled and packaged in the packaging container illustrated in FIG. 4.

First, in the present invention, a few examples of the light-shielding laminate according to the present invention are shown. As shown in FIG. 1, the light-shielding laminate according to the present invention includes at least the substrate film layer 1 and the light-shielding laminate. A light-shielding property comprising a laminated material obtained by laminating the sealable resin layer 2 and further comprising a continuous printing film 3 made of printing ink on one of the layers 1 and 2 constituting the laminated material. Laminated material A can be mentioned.
Alternatively, as the light-shielding laminate according to the present invention, FIG.
As shown in the figure, the laminate comprises at least a base material film layer 1, an intermediate base material layer 4, and a heat-sealing resin layer 2, and further comprises any one of the layers 1, 2,
4 shows a light-shielding laminate B having a layer structure in which a continuous printing film 3 made of printing ink is provided. Further, as shown in FIG. 3, the light-shielding laminated material according to the present invention further includes a heat-shielding laminated material on the other surface of the base film layer 1 in the light-shielding laminated material B shown in FIG. And a light-shielding laminate C having a layer configuration in which the resin layer 2a is laminated. The above examples illustrate a few typical light-shielding laminates according to the present invention, and it is needless to say that the present invention is not limited by these. For example, although not shown, the lamination position of the continuous printing film with the printing ink may be any position, for example, provided on any of the base film layer, the intermediate resin layer, or the heat-sealing resin layer, and One or two or more materials may be used, and other materials may be arbitrarily laminated to manufacture the light-shielding laminated material according to the present invention. Further, in the present invention, the purpose of use, the purpose, the contents to be filled and packaged, its distribution form, sales form, and the like to design the layer configuration as a light-shielding laminated material, base film layer, intermediate resin layer, The light-shielding laminated material according to the present invention can be produced by arbitrarily laminating using a heat-sealing resin layer or other materials.

Next, in the present invention, the packaging container according to the present invention formed by using the light-shielding laminate according to the present invention having the above-mentioned layer constitution will be exemplified. As an example of the packaging container, a packaging container formed by using the light-shielding laminate shown in FIG. 1 to make a bag is shown. As shown in FIG. Are prepared, and the surfaces of the heat-sealing resin layers 2 and 2 constituting the innermost layer thereof are superimposed on each other so as to face each other. By heat-sealing the heat-sealing portions to form heat-sealing portions 5, 5, 5, the packaging container D according to the present invention can be manufactured.

In the present invention, the packaging container exemplified above is an example, and the present invention is not limited thereto. Of course, in the present invention, FIG. Needless to say, the packaging container according to the present invention can be manufactured in the same manner using the light-shielding laminate shown in No. 3 or the like. Also, for example, in the present invention, although not shown, as the form of the packaging container, various forms can be manufactured,
As will be described later, for example, various forms such as a self-supporting bag (standing pouch), a casset type bag, a boat bottom type bag, and the like can be manufactured. Further, in the present invention, the heat seal at the peripheral end portion is used for opening.
In the part corresponding to the opening part, for example,
An opening notch, a notch, and the like can be engraved.

Next, in the present invention, a packaged product in which contents are filled in the packaging container according to the present invention as described above will be described. As shown in FIG.
The container 6 is filled with the contents 6 from the upper opening of the packaging container D shown in FIG. 1 and then the upper opening is heat-sealed to form the upper end sealing portion 7, thereby forming the packaging according to the present invention. A packaging product E using the container D can be manufactured. In FIG. 3, 5, D, and the like have the same meanings as described above. Thus, in the present invention, the packaging product E as described above is also
As shown in FIG. 6, holding the opening notches 8, 8, etc. in a hand, tearing the bag body and opening the bag, thereby taking out the contents, and providing the contents according to the contents. .

Next, in the present invention, the material constituting the light-shielding laminate material and the packaging container according to the present invention will be described. First, in the present invention, as the base film constituting the base film layer, , Since this is usually the basic material that makes up the packaging container,
It is possible to use a resin film or sheet having excellent properties in mechanical, physical, chemical, etc., and in particular, having strength and toughness and having heat resistance. Specifically, for example, polyester resin, polyamide resin, polyaramid resin, polyolefin resin such as polyethylene or polypropylene, polystyrene resin, polyacryl or methacryl resin, polycarbonate resin, polyacetal Films or sheets of tough resins such as resin, fluorine resin, polyacrylonitrile resin, polyvinyl alcohol resin, and others can be used. Thus,
As the resin film or sheet described above, a stretched film stretched in either the longitudinal direction or the transverse direction in one uniaxial direction can be used. As the stretching method, for example, a known method such as a flat method or an inflation method can be used, and the stretching ratio is about 2 to 10
Double-ordered ones can be used. Further, the thickness of the film is about 5 μm to 100 μm, preferably about 10 μm to 50 μm. In the present invention, for example, a desired printing pattern such as a character, a figure, a symbol, a picture, a pattern, etc. is applied to the resin film as described above by a front printing or a back printing by a normal printing method. It may be.

Next, in the present invention, as the heat-sealing resin constituting the heat-sealing resin layer, a resin which can be melted by heat and fused to each other can be used. Specifically, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-acryl Ethyl acid copolymer, ethylene-
A polyolefin resin such as methacrylic acid copolymer, ethylene-methyl methacrylate copolymer, ethylene-propylene copolymer, methylpentene polymer, polybutene polymer, polyethylene or polypropylene is converted to acrylic acid, methacrylic acid, maleic acid, fuma -Acid-modified polyolefin resin modified with unsaturated carboxylic acid such as carboxylic acid, maleic anhydride, etc., polyvinyl acetate resin, poly (meth) acrylic resin, polyvinyl chloride resin, polystyrene resin, polyacrylonitrile resin Resins, acrylonitrile-styrene copolymer (AS-based resin), acrylonitrile-butadiene-styrene copolymer (ABS-based resin), and other resins can be used. In the present invention, a heat-sealing resin layer is constituted by a resin film or sheet as described above, or a coating film of a resin composition containing the above-described resin as a main component. be able to. Its thickness is 1 to 200 μm
And preferably about 5 to 100 μm.

Furthermore, in the present invention, the above-described
An ethylene-α-olefin copolymer polymerized by using a metallocene catalyst can also be used as the toseal resin. Specifically, an ethylene-α-olefin copolymer polymerized using a metallocene catalyst, for example, a catalyst formed by a combination of a metallocene complex and an alumoxane such as a catalyst formed by a combination of zirconocene dichloride and methylalumoxane, that is, a metallocene catalyst And an ethylene-α-olefin copolymer obtained by polymerization using the above. Metallocene catalyst, the current catalyst,
The active sites are heterogeneous and are called multi-site catalysts, whereas the active sites are uniform and are also called single-site catalysts. For example, the product name "Cannel" manufactured by Mitsubishi Chemical Corporation, the product name "Evolu" manufactured by Mitsui Petrochemical Industry Co., Ltd., the product name "EXACT" manufactured by EXXON CHEMICAL, USA ", Dow Chemical, USA (DO
W CHEMICAL) brand name “Affinity-
(AFFINITY), brand name "ENGAGE (ENGA
GE) ”and the like, and an ethylene-α-olefin copolymer polymerized using a metallocene catalyst can be used. In the present invention, when an ethylene-α-olefin copolymer polymerized using a metallocene catalyst is used as the heat-sealing resin as described above, a low-temperature heat seal is used when the bag is manufactured. This has the advantage that sealability is possible.

Next, in the present invention, a continuous printing film using a printing ink will be described. First, as a printing ink constituting a continuous printing film, for example, a binder resin is used as a main component of a vehicle, and a dye / A colored ink composition obtained by adding a coloring agent such as a pigment, further optionally adding a desired auxiliary, and kneading the mixture sufficiently with a solvent, a diluent or the like can be used. In the above, as the binder resin, for example, polyvinyl chloride resin, polyvinyl acetate resin, vinyl chloride-vinyl acetate copolymer, polyacrylic or methacrylic resin, maleic acid resin, fumaric acid resin, polyacrylic resin Nitrile resin, polyolefin resin, acid-modified polyolefin resin, polystyrene resin, drying oil alkyd resin, alkyd resin, polyester resin, polyamide resin, polyurethane resin, phenol resin, amino resin, epoxy A mixture of one or more of resin, rosin resin, ester gum, cellulose resin such as nitrocellulose or ethylcellulose, rubber derivative, petroleum resin, and the like can be used. In the above, as a coloring agent such as a dye / pigment, for example, yellow pigments such as fast yellow, disazo yellow, titanium yellow, yellow iron oxide, and graphite, toluidine red, lake red, Bengara,
Red, orange or brown pigments such as molybdenum red and vermillion, blue or green pigments such as ultramarine, navy blue, cobalt titanate green and chromium oxide, and white pigments such as titanium oxide, zinc white and zinc sulfide. Pigments, black pigments such as carbon black, calcium carbonate, precipitated pigments such as barium sulfate, clay and talc, azo dyes / pigments, phthalocyanine pigments, quinacridone pigments, isoindolinone pigments, One or more mixtures of coloring agents such as dioxazine-based pigments, thioindigo-based pigments, anthraquinone-based dyes / pigments, and other dyes / pigments can be used. Further, in the above, examples of the auxiliary agent include auxiliary agents such as stabilizers, plasticizers, ultraviolet absorbers, antioxidants, lubricants, antistatic agents, fillers, waxes, greases, dispersants, and the like. One or more of the agents can be optionally added and used. In the above, examples of the solvent / diluent include alcohol solvents, ester solvents, ether alcohol solvents, aliphatic hydrocarbon solvents, aromatic hydrocarbon solvents, ketone solvents. , Etc. can be used. In the present invention, the above materials are used, for example, premixing is performed using a mixer, a kneader, or the like, and then fully performed using a roll mill, a ball mill, a sand mill, or the like. The printing ink can be manufactured by kneading.

Next, in the present invention, as a method of forming a continuous printing film, for example, the above-described printing ink is used, and the above-mentioned base film layer, intermediate base layer, or heat seal is used. Gravure coating, roll coating, knife coating, spray coating, gravure printing, flexo printing, screen printing, offset printing,
The continuous printing film according to the present invention can be formed by printing or coating by other usual printing method or coating method and then drying the printing or coating film. The film thickness is set to 0.
5 g / m ² to 20 g / m ² , preferably 1.0 g / m ²
g / m ² to 10 g / m ² is desirable. In the present invention, a light-shielding effect is exhibited by the continuous printing film as described above. Therefore, as a coloring agent used in the printing ink, particularly, an ultraviolet ray having a light wavelength of 380 nm or less and It is preferable to use one or more colorants having a light transmittance of 5% or less at wavelengths of visible and near-infrared light having a light wavelength of 380 to 550 nm. In the present invention, the amount of the coloring agent is 0.1 to 30 parts by weight per 100 parts by weight of a binder resin as a vehicle constituting the printing ink.
Preferably, it is desirable to mix at a ratio of 0.4 to 20 parts by weight.

In the present invention, the continuous printing film having a light-shielding property can be constituted by a single-layer continuous printing film. It can also be constituted by a continuous printing film. For example, in the present invention, a continuous printing film containing a white pigment and a continuous printing film containing a chromatic pigment such as a red, brown, or blue pigment are used as the continuous printing film having a light-shielding property. A light-blocking continuous printing film composed of layers can be used. In the above case, as a continuous printing film containing a white pigment, the total light transmittance is 70% or less, and 0
It is preferable that the total light transmittance of the resin layer containing the chromatic pigment is 50% or less.
% Or less, in order to obtain a desirable light-shielding, it is preferable to be in the range of 0 to 30% or less. In the above case, the continuous printing film containing a white pigment has a transmittance of 1% or less at each light wavelength of 390 nm or less, and the resin layer containing a chromatic pigment has a transmittance of 400% or less. ~ 600
At each wavelength of nm, the transmittance is preferably 5% or less.

Further, in the present invention, as the intermediate base material constituting the intermediate base material layer, for example, a material having a property of impervious to water vapor, water, gas and the like can be used. May be a single substrate or a composite substrate obtained by combining two or more types of substrates. Specifically, for example, a resin film having a vapor-deposited film of an inorganic oxide such as silicon oxide or aluminum oxide having a barrier property against water vapor or gas, or a low-density film having a barrier property against water vapor or water. polyethylene,
Medium-density polyethylene, high-density polyethylene, linear low-density polyethylene, polypropylene, a resin film or sheet such as an ethylene-propylene copolymer, and further, polyvinylidene chloride having a gas barrier property, polyvinyl alcohol, A resin film or sheet such as a saponified ethylene-vinyl acetate copolymer, a resin film having an aluminum vapor-deposited film, and the like can be used. These materials can be used alone or in combination of two or more. The thickness of the above-mentioned film or sheet is arbitrary, but is usually preferably about 5 μm to 300 μm, more preferably about 10 μm to 100 μm. In the above description, the thickness of the inorganic oxide vapor-deposited film is 100 to 3000 mm.
Å can be used. Further, in the above, as the deposited film of aluminum, a film having a thickness of about 100 to 400 mm can be used. Also,
Examples of the resin film supporting the above-mentioned vapor-deposited film include polyester films, polyamide films, polyolefin films, polyvinyl chloride films, polycarbonate films, polyvinylidene chloride films, polyvinyl alcohol films, and ethylene-vinyl acetate. A saponified polymer film and others can be used.

Further, in the above, as the inorganic oxide constituting the above-mentioned inorganic oxide vapor-deposited film layer, for example, silicon oxide (SiO _x ), aluminum oxide, indium oxide, tin oxide, zirconium oxide or the like is used. can do. Furthermore, in the present invention, the inorganic oxide may be a mixture of silicon monoxide and silicon dioxide, or a mixture of silicon oxide and aluminum oxide. In the present invention, as a method of forming the inorganic oxide thin film layer, the thin film layer is formed by forming a vapor deposition film by a vacuum vapor deposition method such as an ion beam method or an electron beam method, or a sputtering method. be able to. In the above, the thickness of the inorganic oxide thin film layer is usually from 100 to 3000 to obtain sufficient barrier properties.
And particularly preferred in the present invention.
It is desirable to be around 00 to 2000 mm. In the above,
When the thickness of the inorganic oxide thin film layer exceeds 2000 mm,
In particular, if it exceeds 3000 °, cracks and the like are liable to be formed in the thin film layer of the inorganic oxide, and there is a danger that the barrier property is lowered by the warp, and the material cost is increased. Also, 200
If it is less than {}, more preferably less than 100 °, it is difficult to achieve the effect of the barrier property, which is not preferable.

Next, in the present invention, the heat-sealing resin constituting the outermost layer of the light-shielding laminate is the above-mentioned heat-sealing resin. The hydrophilic resin can be used as it is, and its film or sheet can be used. The thickness of the film or sheet is 5 μm to 300 μm
And preferably about 10 μm to 100 μm. By the way, in the present invention, the heat-sealing resin layer as described above is also provided on the outermost layer, and the innermost surface and the outermost surface are overlapped with each other to form an end portion of the superposed surface. By heat sealing to form a seal portion,
The packaging container according to the present invention can be manufactured.

In the present invention, in addition to the above-mentioned materials, usually, packaging containers are subjected to severe conditions, both chemically and physically, when filling and packaging various articles. Because of that, in addition to the above materials,
Resin films or sheets that make up ordinary soft packaging bags
Can be used as well, specifically, for example,
Low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene,
Ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid or methacrylic acid copolymer, methylpentene polymer, polybutene resin, polychlorinated Vinyl resin, polyvinyl acetate resin, polyvinylidene chloride resin, vinyl chloride-vinylidene chloride copolymer, poly (meth) acrylic resin, polyacrylonitrile resin, polystyrene resin, acrylonitrile-styrene copolymer ( AS-based resin), acrylonitrile-butadiene-styrene copolymer (ABS-based resin),
Polyester resin, polyamide resin, polycarbonate resin, polyvinyl alcohol resin, ethylene
Saponified vinyl acetate copolymer, fluorine-based resin, diene-based resin, polyacetal-based resin, polyurethane-based resin,
It can be arbitrarily selected from known resin films or sheets such as nitrocellulose and the like.
In addition, for example, a film such as cellophane, synthetic paper, or the like can be used. In the present invention, any of the above-mentioned resin films or sheets that have not been stretched or stretched uniaxially or biaxially can be used. The thickness is arbitrary, but is from several μm to 3 μm.
It can be used by selecting from a range of about 00 μm.
Furthermore, in the present invention, as the resin film or sheet, extrusion film formation, inflation film formation, and
Any property such as a thin film may be used.

Next, a method of manufacturing the light-shielding laminate according to the present invention using the above-mentioned materials in the present invention will be described. As the method, a normal packaging material is manufactured. Sometimes used lamination methods such as wet lamination, dry lamination, solventless dry lamination, extrusion lamination, T-die co-extrusion molding, co-extrusion lamination, It can be performed by an inflation method or the like. Thus, in the present invention, when performing the above lamination, if necessary, a pretreatment such as a corona treatment or an ozone treatment can be applied to the film. (Urethane),
For anchoring agents such as polyethyleneimine, polybutadiene, and organotitanium, or for laminates such as polyurethane, polyacryl, polyester, epoxy, polyvinyl acetate, cellulose, etc. Known anchor coating agents such as adhesives, adhesives and the like can be used.

By the way, in the above-mentioned method for producing a light-shielding laminated material, the extruded resin constituting the adhesive resin layer at the time of extrusion laminating includes, for example, polyethylene, ethylene-α-olefin copolymer, Polypropylene, polybutene, polyisobutene, polyisobutylene, polybutadiene, polyisoprene, ethylene-methacrylic acid copolymer, or copolymer of ethylene and unsaturated carboxylic acid such as ethylene-acrylic acid copolymer, or an acid obtained by modifying them Modified polyolefin resin,
Ethylene-ethyl acrylate copolymers, ionomer resins, ethylene-vinyl acetate copolymers, and the like can be used. Further, in the present invention, as the adhesive constituting the adhesive layer when dry laminating, specifically, a two-component curable urethane-based adhesive or a polyester urethane-based adhesive used in dry laminates and the like Polyether urethane adhesives, acrylic adhesives, polyester adhesives, polyamide adhesives, polyvinyl acetate adhesives, epoxy adhesives, rubber adhesives, and the like can be used.

Next, in the present invention, a method for producing a packaging container using the light-shielding laminate according to the present invention will be described. As such a method, there are various methods. The packaging container according to the present invention is made by using a material and superposing the heat-sealing resin layer surfaces facing each other, and further heat-sealing the peripheral end thereof to provide a seal portion. Can be manufactured. In the above, examples of the form of heat sealing the peripheral end portion include side seal type, two-way seal type, three-way seal type, four-way seal type, and the like.
Envelope-sealed seal type, Gassho-sealed seal type (pyro-seale type), pleated seal type, flat bottom seal type, square bottom seal type,
Heat seal forms, such as a boat bottom seal type and others, can be given, and various types of packaging containers suitable for this can be manufactured. In addition, for example, a self-supporting packaging bag (standing pouch) or the like can be manufactured.
In the above, as a method of heat sealing, for example,
It can be performed by a known method such as a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high-frequency seal, an ultrasonic seal, or the like.

In the present invention, the packaging container according to the present invention produced as described above can be used for filling and packaging of various articles, for example, industrial products such as food and drink, detergents, pharmaceuticals, and others. Etc. are suitable for filling and packaging. In particular, the packaging container according to the present invention is, for example, a confectionery or snack food containing a large amount of fats and oils, foods and drinks such as frozen foods cooked with fats and oils, processed meat foods and the like, or liquid detergents, softeners, shampoos, and rinses. Suitable for filling and packaging of various products such as industrial products, chemicals, medicines, pharmaceuticals such as drinks, etc., whereby the contents as described above are affected by light, the quality etc. changes, This can prevent the quality from being deteriorated. Further, in the present invention, a packaged product obtained by filling and packaging such an article as described above can be easily inspected for the presence or absence of foreign matter such as a metal therein by using a metal detector or the like. Things.

[0025]

The present invention will be described more specifically with reference to the following examples. Example 1 A printing film having a thickness of 1.5 to 1.7 g / m ² (dry) was printed on one surface of a biaxially stretched polypropylene film having a thickness of 20 μm using gold-red ink by gravure printing. Was formed. Next, a vapor deposition thickness of 2
Thickness 2 having an aluminum vapor deposition film of 50 to 350 °
A non-stretched polypropylene film having a thickness of about 20 μm is hot-melt extruded using a low-density polyethylene so that the aluminum-deposited film faces the 0-μm unstretched polypropylene film. Was manufactured. (Inner side) Non-stretched polypropylene film having a thickness of 20 μm, deposited film of aluminum having a thickness of 250 to 350 ° / low-density polyethylene layer having a thickness of 20 μm / thickness of 1.5 to 1.
7 g / m ² printed film / biaxially oriented polypropylene film having a thickness of 20 μm Next, using the laminated material produced above,
A three-sided seal-type flat pouch was manufactured, and snacks were filled and packaged from the opening to manufacture a packaged product. For the above packaged product, 1500 Lx, 37 ° C under white fluorescent light
A light irradiation preservation test was conducted under the conditions described above, and no deterioration phenomenon such as oxidation of the contents was observed even after 15 days.

Example 2 On one surface of a biaxially stretched polypropylene film having a thickness of 20 μm, a blue ink was used, and the entire surface was solid-printed by a gravure printing method to obtain a thickness of 2.0 to 2.4 g / m ² (dry). Was formed. Next, a vapor deposition thickness of 2
Thickness 2 having an aluminum vapor deposition film of 50 to 350 °
A non-stretched polypropylene film having a thickness of about 20 μm is hot-melt extruded using a low-density polyethylene so that the aluminum-deposited film faces the 0-μm unstretched polypropylene film. Was manufactured. (Inner side) Non-stretched polypropylene film having a thickness of 20 μm, deposited film of aluminum having a thickness of 250 to 350 ° / low-density polyethylene layer having a thickness of 20 μm / thickness of 2.0 to 2.
4 g / m ² printed film / biaxially oriented polypropylene film having a thickness of 20 μm Next, using the laminated material produced above,
A three-sided seal-type flat pouch was manufactured, and snacks were filled and packaged from the opening to manufacture a packaged product. For the above packaged product, 1500 Lx, 37 ° C under white fluorescent light
A light irradiation preservation test was conducted under the conditions described above, and no deterioration phenomenon such as oxidation of the contents was observed even after 15 days.

Example 3 On one surface of a biaxially stretched polypropylene film having a thickness of 20 μm, black ink was used, and the whole surface was solid-printed by a gravure printing method to obtain a film having a thickness of 1.5 to 1.8 g / m ² (dry). A printed film was formed. Next, a vapor deposition thickness of 2
Thickness 2 having an aluminum vapor deposition film of 50 to 350 °
A non-stretched polypropylene film having a thickness of about 20 μm is hot-melt extruded using a low-density polyethylene so that the aluminum-deposited film faces the 0-μm unstretched polypropylene film. Was manufactured. (Inner side) Non-stretched polypropylene film having a thickness of 20 μm, deposited film of aluminum having a thickness of 250 to 350 ° / low-density polyethylene layer having a thickness of 20 μm / thickness of 1.5 to 1.
8 g / m ² printed film / biaxially oriented polypropylene film having a thickness of 20 μm Next, using the laminated material produced above,
A three-sided seal-type flat pouch was manufactured, and snacks were filled and packaged from the opening to manufacture a packaged product. For the above packaged product, 1500 Lx, 37 ° C under white fluorescent light
A light irradiation preservation test was conducted under the conditions described above, and no deterioration phenomenon such as oxidation of the contents was observed even after 15 days.

Comparative Example 1 An unstretched polypropylene film having a thickness of 250 to 350 ° and a 20 μm-thick non-stretched polypropylene film having an aluminum vapor-deposited film on one surface of a biaxially stretched polypropylene film having a thickness of 20 μm were opposed to each other. Then, a low-density polyethylene was used and hot-melt extruded and laminated so as to have a thickness of about 20 μm to produce a laminated material having the following layer constitution. (Inner side) Non-stretched polypropylene film with a thickness of 20 μm, evaporated aluminum film with a thickness of 250 to 350 ° / low-density polyethylene layer with a thickness of 20 μm / biaxially stretched polypropylene film with a thickness of 20 μm

Experimental Example 1 The total light transmittance of each of the laminates manufactured in Examples 1 to 3 and the laminate manufactured in Comparative Example 1 was measured.
The measurement was performed using an SM color computer (model name, SM-5-1S-2B, manufactured by Suga Test Instruments Co., Ltd.). The results of the measurement are shown in Table 1 below.

[0030]

[Table 1]

As is clear from the measurement results shown in Table 1 above, the laminates manufactured in Examples 1 to 3 were excellent in light-shielding properties. In contrast, that of Comparative Example 1 was inferior in light-shielding properties.

Example 4 On one side of a biaxially stretched polypropylene film having a thickness of 20 μm, a black ink was used, and the entire surface was solid-printed by a gravure printing method to obtain a 1.5 to 1.8 g / m ² (dry) thick film. A printed film was formed. Next, a vapor deposition thickness of 2
Thickness 20 having a deposited silicon oxide film of 50-350 °
A non-stretched polypropylene film having a thickness of about 20 μm is laminated by hot-melt extrusion using a low-density polyethylene with the silicon oxide vapor-deposited film faced to the thickness of about 20 μm. A laminated material was manufactured. (Inner side) Non-stretched polypropylene film having a thickness of 20 μm, deposited silicon oxide film having a thickness of 250 to 350 ° / low-density polyethylene layer having a thickness of 20 μm / thickness of 1.5 to 1.8
g / m ² printed film / biaxially oriented polypropylene film with a thickness of 20 μm Next, a three-sided seal-type flat pouch is manufactured using the laminated material manufactured as described above, and snack confectionery is filled and packaged through the opening. To produce packaging products. The packaged product was subjected to a light irradiation storage test under a condition of 1500 Lx and 37 ° C. under a white fluorescent lamp, and no deterioration phenomenon such as oxidation of the contents was observed even after 15 days.

[0033]

As apparent from the above description, the present invention focuses on the fact that a continuous printing film made of printing ink has a light-shielding property, and at least comprises a base film layer and a heat-sealing resin layer. A laminated material is formed by laminating a laminated material, and further, a continuous printing film made of a printing ink is provided on any of the layers constituting the laminated material to form a laminated material. Then, the packaging container is manufactured, and the content is filled and packed in the packaging container to produce a packaged product, which has a sufficient light-shielding property and is excellent in protection suitability of the content. In addition, a light-shielding laminate which is simple to manufacture and does not increase the manufacturing cost, and a packaging container and the like using the same can be manufactured. Further, in the present invention, the continuous printing film having a light-shielding property,
Since the heat-sealing resin layer is interposed as the innermost layer, there is no effect on the contents, and the heat-sealing property of the heat-sealing resin layer can be inhibited. Not something. Further, in the present invention, when the aluminum-deposited resin film is not used as the intermediate base material layer, a packaging container is manufactured using the light-shielding laminate according to the present invention, and then the content is filled therein. Wrapped packaging products,
This has the advantage that foreign substances such as metals can be easily inspected by a metal detector or the like.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an example of a layer configuration of a light-shielding laminate according to the present invention.

FIG. 2 is a schematic sectional view showing an example of a layer configuration of a light-shielding laminate according to the present invention.

FIG. 3 is a schematic sectional view showing an example of a layer configuration of a light-shielding laminate according to the present invention.

FIG. 4 is a schematic perspective view showing a configuration of a packaging container according to the present invention, which is made by using the light-shielding laminate shown in FIG.

5 is a schematic perspective view showing a configuration of a packaged product in which contents are filled and packed in the packaging container shown in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base film layer 2 Heat-sealing resin layer 2a Heat-sealing resin layer 3 Continuous printing film 4 Intermediate base material layer 5 Heat-sealing part 6 Contents 7 Top-sealing part 8 Opening Notch A A Light-blocking laminate B Light-blocking laminate C Light-blocking laminate D Packaging container E Packaging product

Continued on the front page (51) Int.Cl. ⁶ Identification code FI B65D 81/30 B65D 81/30 A

Claims (7)

[Claims] 1. At least a substrate film layer and a heat seal
A light-shielding laminated material comprising a laminated material obtained by laminating a transparent resin layer, and further comprising a continuous printing film made of a printing ink on one of the layers constituting the laminated material. 2. The light-shielding device according to claim 1, wherein the laminate comprises a laminate of at least a base film layer, an intermediate base layer, and a heat-sealing resin layer. Laminated material. 3. The laminated material is provided on another surface of the substrate film layer,
3. The light-shielding laminate according to claim 1, further comprising a laminate in which a heat-sealing resin layer is laminated. 4. The light-shielding laminate according to claim 1, wherein the intermediate base layer is a barrier base layer having a barrier property against gas and water vapor. . 5. The light-shielding laminate according to claim 4, wherein the barrier-substrate layer is an aluminum-deposited resin film or a resin film having an inorganic oxide-deposited film. 6. Continuous printing layer and barrier with printing ink
Total light transmittance together with the conductive base material layer is 0.0 to 0.2.
%. The light-shielding laminate according to claim 2, 3, 4 or 5, wherein 7. At least a substrate film layer and a heat seal
And a light-shielding laminate provided with a continuous printing film of printing ink on one of the layers constituting the laminate, and A packaging container characterized by being made in a bag.