JPH10741A - Film with barrier properties, laminate using this film and packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high barrier properties, to light, gas and vapor, superior suitability for packaging the content and also suitability for incineration and, after use, make an easy disposal as incineration ash. SOLUTION: This resin film with barrier properties has a thin film layer 2 of an inorganic oxide and a thin film layer 3 of aluminum formed on one of the faces of a resin film. In addition, at last, a heat sealing film Al is stacked on one of the faces of the film A with barrier properties, while at least, a base material film 5 is stacked on the other face to form a laminate B1. This laminate B1 is fabricated into a bag or a box as a packaging container.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a barrier film, a laminate using the same, and a packaging container. More specifically, the present invention has an excellent barrier property against light, gas, water vapor, etc. The present invention relates to a barrier film suitable for filling and packaging an article, a laminate using the same, and a packaging container.

[0002]

2. Description of the Related Art Conventionally, liquid products such as fruit juices, alcoholic beverages, yogurt, seasonings, etc., liquid products such as pharmaceuticals, cosmetics, toothpastes, paints, adhesives, inks, developers, etching solutions, etc. Various packing materials and packaging containers using the same have been developed and proposed in order to fill and package the food. Thus, as the above-described packaging material or packaging container, the most typical one is an aluminum foil having a barrier function against light, gas, water vapor and the like, and a laminate structure including the aluminum foil is used. There is a packaging container produced by producing a laminated body and making a bag or a box using the laminated body. The packaging container formed by using the laminate including the aluminum foil has excellent light-shielding properties, and also has excellent gas-barrier properties for oxygen and the like, and does not show any deterioration in its functions. It can manufacture packaging products.

[0003]

However, in a packaging container using a laminate made of aluminum foil as a barrier substrate as described above, after using it, it is disposed of as garbage. Sometimes there are various problems. For example, it is practically difficult to recover aluminum foil from a laminate even if it is recovered and reused after use, and even if incinerated, aluminum foil lacks suitability for incineration. However, there is a problem that the incinerator is damaged, and in any case, it is difficult to dispose of used packaging containers, which is considered to be one of the causes of environmental problems. In order to solve the above problems,
It has been proposed to use a resin film having a deposited film of an inorganic oxide such as silicon oxide instead of the aluminum foil. It has excellent barrier properties,
In addition, it has incineration suitability, and in recent years, has attracted much attention as a substitute material for aluminum foil. However, a resin film having a vapor-deposited film of the above-described inorganic oxide such as silicon oxide is inferior in light-shielding properties as compared with an aluminum foil because it is a transparent film, and causes deterioration and deterioration of contents. In addition, there is also a problem that the barrier properties against gases such as oxygen and water vapor are slightly inferior to aluminum foil, and there is a problem that the expiration date must be set. is there. Therefore, the present invention provides a high barrier against light, gas, water vapor and the like.
Packaging material, packaging laminate, and packaging container that can be easily disposed of as burnable garbage after use, have excellent suitability for filling and packaging the contents, and have suitability for incineration. And so on.

[0004]

As a result of various studies to solve the above-mentioned problems, the present inventor focused on a thin film of an inorganic oxide such as silicon oxide and a thin film of aluminum, and utilized the thin film. First, a barrier film having an inorganic oxide thin film layer and an aluminum thin film layer provided on one surface of a resin film is produced, and then at least one surface of the barrier film is Laminating a heat-sealable film and, on the other surface, at least a laminate formed by laminating a base film, and then using the laminate to form a bag or Manufacture a box to produce a packaging container, in the packaging container, fruit juices, liquid foods and beverages such as alcohol,
When filled with other liquid products such as pharmaceuticals, cosmetics, toothpaste, etc., it has a high barrier property against light, gas, water vapor, etc., prevents deterioration and deterioration of the contents, and has excellent filling and packaging suitability. The present invention has been completed by finding a packaging material, a packaging laminate, a packaging container, and the like, which can be easily disposed of as combustion waste after use.

That is, the present invention is a barrier film characterized in that a thin film layer of an inorganic oxide and a thin film layer of aluminum are provided on one side of a resin film. The present invention also provides a heat-sealing film on at least one side of a barrier film having a thin film layer of inorganic oxide and a thin film layer of aluminum provided on one side of a resin film. A laminated body characterized by laminating at least a base film on the other surface, and a packaging container characterized by being formed into a bag or a box.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below. Barrier film according to the present invention,
The laminate and the packaging container will be described with reference to the drawings and specific examples. FIGS. 1, 2 and 3 are schematic cross-sectional views showing the layer structure of the barrier film according to the present invention. 4 and 5 are schematic sectional views showing the layer structure of the laminate according to the present invention, and FIGS. 6 and 7 are perspective views showing an example of the packaging container according to the present invention. First, as shown in FIG. 1, a barrier film A according to the present invention comprises, on one side of a resin film 1, a thin film layer 2 of an inorganic oxide.
And a thin film layer 3 of aluminum. In the present invention, the order in which the inorganic oxide thin film layer 2 and the aluminum thin film layer 3 are provided may be in any order. As shown in FIG. An oxide thin film layer 2 is provided, and an aluminum thin film layer 3 is provided thereon. A barrier film A ₁ , or as shown in FIG. may be either film a ₂ - of the provided thin film layer 3, the barrier comprising a structure in which a thin layer 2 of an inorganic oxide thereon.

Next, the laminate according to the present invention will be described with reference to an example in which the laminate is formed using the barrier film A shown in FIG. 1. As shown in FIG.
A thin film layer 2 made of an inorganic oxide and a thin film layer 3 made of aluminum are provided on one surface of a resin film 1 to constitute a barrier film A according to the present invention. At least a heat-sealing film 4 is laminated on one surface, and at least a base film 5 is laminated on the other surface.
Are laminated. Alternatively, in the present invention, as shown in FIG. 5, the laminate B _{1 according} to the present invention is provided with a thin film layer 2 made of an inorganic oxide and a thin film layer 3 made of aluminum on one surface of a resin film 1. , A barrier film A is formed, and at least a heat-sealing film 4 is laminated on one surface of the barrier film A, and at least a base film is formed on the other surface. 5 was laminated, further on the base film 5, heat - tosyl - is made of a structure obtained by laminating a Le film 4 _1. In the above, although not shown, the heat-sealing film 4 and the base film 5 may be laminated on surfaces opposite to those shown in FIGS. 4 and 5 respectively. Of course, in the present invention, it is needless to say that the laminate according to the present invention can be manufactured by using the barrier films A ₁ and A ₂ shown in FIGS. No.

Next, the packaging container according to the present invention will be described. First, in the case where the packaging container according to the present invention is a soft packaging bag, it is manufactured using the laminate B shown in FIG. To explain with an example, as shown in FIG.
First, two laminates B manufactured as described above are prepared, and the laminates B and B are superposed on each other with the heat-sealing films 4 and 4 facing each other. -Toshi-
Then, seals 6, 6 and 6 are formed on the three sides to produce a packaging bag, and then the contents 7 are filled from the opening on one side of the unsealed part, and then the unsealed part is filled. Heat seal one side of the seal
Then, a sealing part 8 is formed on one side thereof, and a packaged product C filled and packaged using the packaging container according to the present invention can be manufactured.

Alternatively, in the present invention, the case where the packaging container according to the present invention is a paper container will be described with reference to an example of manufacturing using the laminate B shown in FIG.
Using the laminated body B, a blank plate for a paper container which has been subjected to a ruled line for manufacturing a paper container having a predetermined shape is punched out, and then the edges of the blank plate are overlapped, and the overlapped end portion thereof is welded to form a welding portion 9. Is formed to produce the sleeve 10. Next, in the present invention, the sleeve 1 manufactured as described above is used.
0 is mounted on a filling machine, the bottom portion is folded along a predetermined ruled line and heat-sealed by hot air treatment to form a bottom portion 11, and then the contents 7 are filled from an opening at the top portion, and then the content is filled. The top portion is folded along a predetermined ruled line and heat-sealed by hot-air treatment to form a top portion 12 having, for example, a bell-top shape, and filled using the packaging container according to the present invention. A packaged product D can be manufactured. The above-mentioned examples are merely examples of the packaging container according to the present invention, and the present invention is not limited thereto. Of course, in the present invention, the packaging container according to the present invention can be manufactured in the same manner as described above using the laminate according to the present invention shown in FIG.

In the above, the flexible packaging bag as the packaging container according to the present invention further includes a method for producing the same, wherein the laminate according to the present invention is folded or bent with its inner layer facing the inner surface. Two sheets are overlapped, and the peripheral edge of the outer periphery is further formed, for example, by a side seal type, a two-sided seal type, a three-sided seal type, a four-sided seal type, an envelope-attached seal type, a gasket. Paste seal type (pyro-seale type), pleated seal
Various types of flexible packaging bags can be manufactured by heat-sealing according to a heat seal form such as a seal type, a flat bottom type, a square bottom type, and the like. In addition, for example, a self-supporting packaging bag (standing pouch) can be used. In the above, as a method of heat sealing, for example, a bar
It can be performed by a known method such as a seal, a rotary roll seal, a belt seal, an impulse seal, a high-frequency seal, and an ultrasonic seal. Next, as a paper container as a packaging container according to the present invention, for example, using the laminate according to the present invention to manufacture a blank plate from which a desired paper container is to be manufactured, and then the blank plate Can be used to make the bottom, head, etc., to produce, for example, a brick-top type liquid paper container instead of the above-mentioned gabelle top type.

Next, in the present invention, the materials constituting the barrier film, the laminate and the packaging container according to the present invention as described above will be described. First, the barrier film according to the present invention is formed. The resin film to be formed may be a resin film capable of forming a vapor-deposited film of an inorganic oxide or a vapor-deposited film of aluminum, as described later. For example, a polyethylene terephthalate film, a polybutylene terephthalate Film of polyester-based resin such as film, 6 nylon film, 66
Nylon film, 610 nylon film, 612 nylon film, 11 nylon film, 12 nylon film, polyamide resin film such as polyamide film by condensation of metaxylene diamine and dibasic acid, polycarbonate resin film, polyethylene,
Polyolefin resin film such as polypropylene, polyvinyl alcohol resin film, ethylene-vinyl acetate copolymer film, polyvinyl chloride resin film, polyvinylidene chloride resin film, polystyrene resin film, poly (meth) acrylic Resin films, polyacrylonitrile resin films, polyacetal resin films, fluorine resin films, and other resin films can be used. Thus, as the resin film, any one of an unstretched film, or a stretched film stretched in a uniaxial or biaxial direction can be used, and the thickness of the film is as follows: It is preferably about 5 μm to 100 μm, preferably about 10 μm to 30 μm. In the present invention, the film of the resin may be, if necessary, optionally subjected to a known pretreatment such as application of a silane coupling agent or the like, primer treatment, sandplast treatment, etc. The surface of the film can be adjusted.

Next, in the present invention, as the inorganic oxide constituting the inorganic oxide thin film layer, for example, silicon oxide (SiO _x ), aluminum oxide, indium oxide,
Tin oxide, zirconium oxide, or the like can be used. 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,
In order to obtain a sufficient barrier property, the thickness of the inorganic oxide thin film layer is usually preferably about 10 nm to 200 nm, and in particular, in the present invention, it is preferably 20 to 150 nm.
The order of nm is desirable. In the above description, when the thickness of the inorganic oxide thin film layer exceeds 150 nm, and particularly when the thickness exceeds 200 nm, cracks and the like are liable to be formed in the inorganic oxide thin film layer, and the barrier property is reduced by warpage. However, it is not preferable because it has a problem in that the material cost is increased in addition to the above.

Next, in the present invention, ordinary aluminum metal can be used as the aluminum constituting the aluminum thin film layer. Thus, in the present invention, as a method of forming the aluminum thin film layer,
Similarly to the above, it can be formed by forming a deposited film by a vacuum deposition method such as an ion beam method or an electron beam method, a sputtering method, or the like. In the above description, the thickness of the aluminum thin film layer is usually preferably about 10 nm to 200 nm in order to obtain a sufficient light-shielding property, and in particular, in the present invention, it is 20 to 150 nm.
Position is desirable. In the above description, as the thickness of the aluminum thin film layer increases, the total light transmittance decreases. However, when the light-shielding properties of the printed layer and the like are not taken into consideration, the total light transmittance is 80 nm when the thickness of the aluminum thin film layer is 80 nm. The rate becomes 0%. In the present invention, the thickness of the aluminum thin film layer can be adjusted according to the final packaging form, the presence / absence of the printed layer, the position where it is present, and the like, and the required physical properties.

In the present invention, the inorganic oxide thin film layer and the aluminum thin film layer may be formed in any order, either before or after, regardless of the order. May be formed. As described above, in the present invention, the thickness of both the inorganic oxide thin film layer and the aluminum thin film layer is 1 μm.
m or less, and with such a thickness, even if the incineration treatment is performed as it is, the incinerator or the like will not be damaged.

Next, in the present invention, the material constituting the heat-sealing film may be any material that can be melted and fused to each other by heat, such as low-density polyethylene, medium-density polyethylene, and the like. High density polyethylene, linear low density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene Ethylene-unsaturated carboxylic acid copolymers such as methyl methacrylate copolymer, ethylene-propylene copolymer, methylpentene polymer, polybutene polymer, ethylene-acrylic acid copolymer or ethylene-methacrylic acid copolymer Modified acid-modified polyolefin resin, polyvinyl acetate resin, poly (meta It can be used an acrylic resin, polyvinyl chloride resin, other like resins. The above resin can be used in the form of a coating film, a film or a sheet made of a composition containing the resin. The thickness of the film or film is about 5 μm to 300 μm, preferably about 10 μm.
μm to 100 μm is desirable. By the way, in the present invention, the heat-sealing film as described above is
The innermost layer constituting the laminate, or the innermost layer and the outermost layer are provided, and thus, the innermost layer surfaces of the laminate, or the innermost layer surface and the outermost layer surface of the laminate are overlapped. Then, the end portion of the superposed surface is heat-sealed to form a seal portion, thereby producing the packaging container according to the present invention.

Next, in the present invention, the material constituting the base film has excellent properties in mechanical, physical, chemical, etc., and in particular, has strength and toughness. And heat-resistant resin film or sheet
Can be used, specifically, for example, polyester resin, polyamide resin, polyaramid resin, polyolefin resin, polycarbonate resin,
A tough resin film or sheet, such as a polyacetal resin, a fluorine resin, or the like, may be used. Thus, the above resin film or sheet
Any of unstretched films or stretched films uniaxially or biaxially stretched can be used. As the thickness of the film,
It is preferably about 5 μm to 100 μm, and more preferably about 10 μm to 50 μm.

In the present invention, among the above-mentioned base films, particularly, polyolefin resins,
It is preferable to use a polyester-based resin or a polyamide-based resin. Specifically, examples of the polyolefin-based resin include a polyethylene-based resin, a linear low-density polyethylene, a polypropylene, an ethylene-vinyl acetate copolymer, and an ethylene-based resin. Methyl acrylate copolymer, ethylene-methyl methacrylate copolymer, ionomer resin,
Examples of propylene-ethylene copolymers and polyester resins include, for example, dibasic acids such as terephthalic acid, isophthalic acid and adipic acid, and tribasic acids such as trimellitic acid, ethylene glycol and propylene glycol. ,
Condensates such as polyethylene terephthalate and polybutylene terephthalate obtained by condensing glycols such as butylene glycol, and polyamide resins such as 6-nylon and 66-nylon , 610-
Nylon, 612-nylon, 11-nylon, 12-
Condensation products of lactams such as nylon, or diamines such as ethylenediamine, pentamethylenediamine, hexamethylenediamine, p-xylenediamine, m-xylenediamine, and dibasic acids such as adipic acid, sebacic acid and p-phenylene Things and the like can be used.

In the present invention, a desired printing pattern such as a character, a figure, a symbol, a picture, a pattern, or the like is printed on the base film as described above by a normal printing method. Etc. may be applied. Further, in the base film as described above, for example, polyolefin-based resin, or polyester-based resin, if itself has a heat-sealing property, by utilizing it, the present invention, Such a packaging container can be manufactured. Thus, in the present invention, as the base film,
When a resin film or sheet as described above is used, it is mainly possible to produce a soft laminate bag or the like as a packaging laminate constituting a soft packaging bag or a packaging container.

Further, in the present invention, as a material constituting the base film, for example, various paper base materials constituting a paper layer can be used. Body and various paper containers can be manufactured. Specifically, in the present invention, the paper base material is one that imparts moldability, bending resistance, rigidity, and the like,
For example, bleached or unbleached paper base of strong size, or paper base such as pure white roll paper, kraft paper, paperboard, processed paper,
Others can be used. In the above, the paper base material constituting the paper layer has a basis weight of about 80 to 600 g / m.
^Second place, preferably, a basis weight of about 100 to 450 g / m
It is desirable to use the ^second place. Needless to say, in the present invention, a paper base constituting the paper layer and various resin films or sheets as the base films mentioned above can be used in combination. For example, in the present invention, a laminate is constituted by using a film or sheet of a polyolefin-based resin, a polyester-based resin or a polyamide-based resin in combination with the above-described paper base, and a paper is formed using the laminate. In the case of manufacturing a container, when the laminated body is set in a filling and packaging machine to seal the bottom or the top and the like, and heated by hot air or the like, there is an advantage that generation of pinholes or the like is prevented.

Usually, packaging containers are subjected to severe physical and chemical conditions, so that the packaging material constituting the packaging containers is required to have strict packaging suitability, and the deformation prevention strength is required. , Drop impact strength, pinhole resistance, heat resistance, sealability, quality maintenance, workability, hygiene, etc., and various other conditions are required. In addition to the material, any other material that satisfies the above conditions can be arbitrarily used. 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, Polyvinyl chloride resin, polyvinyl acetate resin, polyvinylidene chloride resin, vinyl chloride-vinylidene chloride copolymer, poly (meth) acrylic resin, polyacrylonitrile resin, polystyrene resin, acrylonitrile-styrene copolymer Coalesce (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), polyester resin, polyamide resin, polycarbonate resin, polyvinyl alcohol
Resin, saponified ethylene-vinyl acetate copolymer,
Fluorine resin, diene resin, polyacetal resin,
Any known resin film or sheet such as polyurethane resin, nitrocellulose, etc. can be used. In addition, for example, a film such as cellophane, synthetic paper, or the like can be used. In the present invention, the above-mentioned film or sheet can be used in any of unstretched and uniaxially or biaxially stretched. The thickness is arbitrary, but can be selected from a range of several μm to 300 μm. Further, in the present invention, the film or sheet may be any film such as an extruded film, an inflation film, or a coating film.

Next, in the present invention, if necessary, a barrier film layer can be further laminated.
Thus, as a material constituting such a barrier film layer, a material having a property of blocking light such as sunlight, a property of not transmitting water vapor, water, gas, or 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, water vapor, low density polyethylene having a barrier property such as water, medium density polyethylene, high density polyethylene, linear low density polyethylene,
Polypropylene, ethylene-propylene copolymer or other resin film or sheet, polyvinylidene chloride having gas barrier properties, polyvinyl alcohol, ethylene-
Various light-shielding colored resins obtained by adding a colorant such as a pigment to the resin film or sheet of the resin such as saponified vinyl acetate copolymer, or the like, and kneading it with other desired additives to form a film. Film or sheet or the like can be used. These materials can be used alone or in combination of two or more. The thickness of the above film or sheet is arbitrary, but is usually 5 μm.
About 300 μm, and further about 10 μm to 100 μm
The m-th position is desirable. Further, in the above, as the vapor deposited film of the inorganic oxide, a film having a thickness of about 100 to 2000 mm can be used.

Next, a method of manufacturing a laminate according to the present invention using the above-described materials in the present invention will be described. As such a method, a normal packaging material is laminated. Methods, for example, wet lamination method, dry lamination method, solventless dry lamination method, extrusion lamination method, T-die co-extrusion molding method, co-extrusion lamination method, inflation method, etc. Can be done with Thus, in the present invention, when performing the above-mentioned lamination, if necessary, a pretreatment such as a corona treatment or an ozone treatment can be applied to the film.
(An urethane), polyethyleneimine, polybutadiene, organic titanium-based anchor coating agents,
Or polyurethane, polyacrylic, polyester, epoxy, polyvinyl acetate, cellulose,
Known anchors such as laminating adhesives and the like
Agents, adhesives and the like can be used.

In the above-described method for producing a laminate, the extruded resin constituting the adhesive resin layer at the time of extruding and laminating is, for example, polyethylene,
Ethylene-α-olefin copolymer, polypropylene,
Copolymers of ethylene and unsaturated carboxylic acids such as polybutene, polyisobutene, polyisobutylene, polybutadiene, polyisoprene, ethylene-methacrylic acid copolymer, or ethylene-acrylic acid copolymer, or acid-modified polyolefins obtained by modifying them A series resin, an ethylene-ethyl acrylate copolymer, an ionomer resin, an ethylene-vinyl acetate copolymer, and the like can be used. Further, in the present invention, as the adhesive constituting the adhesive layer at the time of dry lamination, specifically,
Two-component curable urethane adhesives, polyester urethane adhesives, polyether urethane adhesives, acrylic adhesives, polyester adhesives, polyamide adhesives, polyvinyl acetate adhesives used in dry laminates, etc. An adhesive, an ethoxy-based adhesive, a rubber-based adhesive, or the like can be used.

The laminate according to the present invention produced by using the above-mentioned materials and the packaging container using the same include, for example, milk, lactic acid bacteria drink, liquid soup, fruit juice drink, barley tea, Green tea, Wurong tea, alcoholic beverages, seasonings, pharmaceuticals,
Liquid products such as cosmetics, paints, adhesives, inks, developing solutions, etching solutions, and others can be applied to filling and packaging.

[0025]

EXAMPLES The present invention will be described more specifically with reference to examples. Biaxially oriented polyethylene terephthalate of Example 1 thickness of 12 [mu] m - on the Tofirumu, silicon oxide having a thickness of 50nm by vacuum evaporation (SiO _x) deposited film is formed, further, the silicon oxide (SiO _x) An aluminum deposited thin film having a thickness of 40 nm was formed on the deposited thin film by a vacuum deposition method to produce a barrier film.

Example 2 A 40 nm thick aluminum thin film was formed on a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm by a vacuum evaporation method, and further, a vacuum evaporation method was formed on the aluminum thin film. To form a silicon oxide (SiO _x ) vapor-deposited thin film having a thickness of 50 nm to produce a barrier film.

Example 3 In Example 1, a 15 μm thick biaxially stretched polyethylene terephthalate film was used instead of a 12 μm thick biaxially oriented polyethylene terephthalate film.
Using a biaxially stretched nylon film having a thickness of μm, the other steps were performed in the same manner as described in Example 1 above,
A barrier film was produced.

Example 4 A linear low-density polyethylene film having a thickness of 40 μm was dried on a barrier-deposited aluminum thin film of Example 1 using a two-component curable urethane-based adhesive. To produce a laminate.

Example 5 A biaxially stretched polyethylene terephthalate film having a thickness of 12 μm was coated on the aluminum-deposited thin film of the barrier film produced in Example 1 by using a two-component curable urethane-based adhesive. And laminated by dry lamination method, and the thickness of 30 μm
Were laminated by a dry lamination method using a two-component curable urethane-based adhesive to produce a laminate.

Example 6 Low-density polyethylene was extruded and laminated on one side of a paper having a basis weight of 340 g / m ² , and a low-density polyethylene layer having a thickness of 30 μm was laminated. Manufactured. Next, a linear low-density polyethylene film having a thickness of 60 μm was dry-laminated on a vapor-deposited aluminum thin film of the barrier film produced in Example 1 using a two-part curable urethane-based adhesive. To produce a second sheet. Then, the thickness of the barrier film constituting the second sheet produced above is 12 μm.
On the biaxially stretched polyethylene terephthalate film surface of
Low-density polyethylene with a thickness of 30
While extruding with a thickness of μm, the first sheet was opposed to the paper surface and subjected to sand lamination to produce a laminate.

Comparative Example 1 A 50 nm thick silicon oxide (SiO _x ) deposited thin film was formed on a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm by a vacuum deposition method to produce a barrier film. did.

Comparative Example 2 A 40-nm-thick aluminum-evaporated thin film was formed on a 12-μm-thick biaxially stretched polyethylene terephthalate film by a vacuum evaporation method to produce a barrier film.

Comparative Example 3 A linear low-density polyethylene film having a thickness of 40 μm was adhered on a silicon oxide (SiO _x ) vapor-deposited thin film of the barrier film produced in Comparative Example 1 above by two-part curable urethane-based bonding. Laminates were produced by dry lamination using the agents to produce laminates.

Comparative Example 4 A 12 μm-thick 2 μm thick film was deposited on the silicon oxide (SiO _x ) vapor-deposited thin film of the barrier film produced in Comparative Example 1 above.
An axially stretched polyethylene terephthalate film is laminated by a dry lamination method using a two-part curable urethane-based adhesive, and a low-density 30 μm thick film is formed on the other non-silicon oxide (SiO _x ) -deposited thin film surface. A polyethylene film was laminated by a dry lamination method using a two-component curable urethane-based adhesive to produce a laminate.

Comparative Example 5 A low-density polyethylene was extruded and laminated on one side of a paper having a basis weight of 340 g / m ² , and a low-density polyethylene layer having a thickness of 30 μm was laminated thereon. Manufactured. Next, on the silicon oxide (SiO _x ) vapor-deposited thin film of the barrier film produced in Comparative Example 1, a thickness of 6
A second sheet was manufactured by laminating a 0 μm linear low-density polyethylene film by dry lamination using a two-component curable urethane-based adhesive. Next, the low-density polyethylene was extruded at a thickness of 30 μm while the corona treatment was applied to the surface of the biaxially stretched polyethylene terephthalate film having a thickness of 12 μm of the barrier film constituting the second sheet produced above. Then, the above-mentioned first sheet was subjected to sand lamination with the paper surfaces facing each other to produce a laminate.

Experimental Examples The total light transmittance and the oxygen transmittance of each of the barrier films and the laminates produced in Examples 1 to 6 and Comparative Examples 1 to 5 were measured. In the above, the total light transmittance was measured using a color computer, trade name, SM-5 manufactured by Suga Test Instruments Co., Ltd. The oxygen transmittance was measured by Mocon, Inc., USA. Company)
Oxygen permeability was measured at 23 ° C. using a measuring instrument, trade name, OXTRAN (manufactured by Seiko Instruments Inc.) and then converted to a value per 1 m ² . The results of the above experiment are shown in Table 1 below.

[0037]

[Table 1]

As apparent from Table 1 above, Example 1
Each of the barrier films and laminates manufactured in
Although having both excellent gas barrier properties and light-shielding properties, in each of the barrier properties films and laminates manufactured in Comparative Examples 1 to 5, those of Comparative Examples 1, 3, 4, and 5 are:
The light-shielding property was insufficient, and that of Comparative Example 2 was insufficient in gas barrier properties.

[0039]

As is clear from the above description, the present invention focuses on a thin film of an inorganic oxide such as silicon oxide and a thin film of aluminum. Producing a barrier film comprising an inorganic oxide thin film layer and an aluminum thin film layer, and then laminating at least a heat-sealing film on one surface of the barrier film. , On the other side, at least
A laminate formed by laminating a base film is produced, and then the laminate is used to produce a packaging container by bag making or box making in accordance with a conventional method. Filled and packed with other liquid products such as liquid foods and drinks such as liquors, pharmaceuticals, cosmetics, toothpaste, etc., and has a high barrier property against light, gas, water vapor, etc., and prevent deterioration and deterioration of the contents. In addition, it is possible to produce packaging materials, packaging laminates, packaging containers, and the like that have extremely excellent filling and packaging suitability and that can be easily disposed of as garbage after use. Things.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a layer configuration of a barrier film according to the present invention.

FIG. 2 is a schematic cross-sectional view showing a layer structure of a barrier film according to the present invention.

FIG. 3 is a schematic cross-sectional view illustrating a layer configuration of a barrier film according to the present invention.

FIG. 4 is a schematic sectional view showing a layer configuration of a laminate according to the present invention.

FIG. 5 is a schematic sectional view showing a layer configuration of a laminate according to the present invention.

FIG. 6 is a perspective view showing an example of a packaging container according to the present invention.

FIG. 7 is a perspective view showing an example of a packaging container according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Resin film 2 Inorganic oxide thin film layer 3 Aluminum thin film layer 4 Heat-sealing film 4 ₁ Heat-sealing film 5 Base film 6 Seal part 7 Contents 8 Seal part 9 Welding part 10 Sleeve 11 Bottom part 12 Top part A Barrier film A ₁ Barrier film A ₂ Barrier film B Laminate C Packaging product D Packaging product

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B32B 27/34 B32B 27/34 B65D 1/09 B65D 5/56 5/56 65/40 D 65 / 40 1/00 B

Claims (9)

[Claims] 1. A barrier film comprising a resin film provided on one side with a thin layer of inorganic oxide and a thin layer of aluminum. 2. The barrier film according to claim 1, wherein the resin film is a polyethylene terephthalate film or a polyamide film. 3. The method according to claim 1, wherein the inorganic oxide thin film layer is an inorganic oxide deposited film layer.
4. The barrier film described in 1. 4. The method according to claim 1, wherein the aluminum thin film layer is an aluminum vapor deposition film layer.
Or the barrier film according to 3. 5. The method according to claim 1, wherein the inorganic oxide thin film layer and the aluminum thin film layer are provided with an inorganic oxide thin film layer, and an aluminum thin film layer is provided thereon. 5. The barrier film according to 2, 3, or 4. 6. The thin film layer of an inorganic oxide and the thin film layer of aluminum, wherein a thin film layer of aluminum is provided first, and a thin film layer of an inorganic oxide is provided thereon. 6. The barrier film according to 2, 3, 4, or 5. 7. A heat-sealing film is laminated on at least one surface of a barrier film in which an inorganic oxide thin film layer and an aluminum thin film layer are provided on one surface of a resin film, A laminate comprising at least a substrate film laminated on the other surface. 8. A base film further comprising a base film thereon.
8. The laminate according to claim 7, wherein the laminate is formed by laminating a sealable film. 9. A heat-sealing film is laminated on at least one surface of a barrier film having a thin film layer of inorganic oxide and a thin film layer of aluminum provided on one surface of a resin film, A packaging container, characterized in that a laminate formed by laminating a base film on the other surface is formed in a bag or a box.