JP2021160267A - Laminate and packaging container - Google Patents

Abstract

To provide a laminate favorably usable for producing a mono-material packaging container, with high adhesion to a vapor-deposited film, capable of effectively preventing delamination when made into a packaging container and having high gas barrier properties.SOLUTION: A laminate at least includes a first sealant layer 11, a vapor-deposited film 12, a substrate 13 and a gas barrier layer 14, and a second sealant layer 15. The substrate 13 at least includes a first polyethylene resin layer composed of a polyethylene resin of a density 0.943 g/cm3 or less. A drawing process is applied to the substrate 13. The vapor-deposited film 12 is disposed on the first polyethylene resin layer of the substrate 13. The first sealant layer 11 and the second sealant layer 15 are composed of a polyethylene resin.SELECTED DRAWING: Figure 1

Description

The present invention relates to laminates and packaging containers.

Conventionally, a resin film made of a polyester resin such as polyethylene terephthalate (hereinafter, also referred to as a polyester film) is excellent in mechanical properties, chemical stability, heat resistance and transparency, and is inexpensive. It is used as a base material constituting the laminate used in.

Such a polyester film is usually laminated with a polyethylene film which is a sealant layer to form a laminate, and then molded into a packaging container.

The above-mentioned packaging container made of a laminate of different types of resin films, that is, a polyester film and a polyethylene film, is difficult to separate into each layer, and the packaging container recovered after use. Is not suitable for recycling and is not actively recycled.

Then, for the purpose of improving the recyclability of the packaging container, instead of the polyester film, a stretched polyethylene film (stretched polyethylene film) is applied to the base material, and packaging using a laminate composed of the same material is used. The production of containers (monomaterial packaging containers) is being considered.

Now, in order to compensate for the gas barrier property that has deteriorated due to the change of the polyester film to the stretched polyethylene film, and to improve its design and glossiness, the present inventors have recently put a vapor-deposited film on the surface of the stretched polyethylene film. However, the adhesion between the stretched polyethylene film and the vapor-deposited film was not sufficient. We have found a new problem that peeling (delamination) may occur.

Surprisingly, the present inventors have made remarkable adhesion between the layer and the vapor-deposited film by adjusting the density of the polyethylene resin in the layer forming the vapor-deposited film of the base material composed of the polyethylene resin. It was found that the above problems can be solved.

Surprisingly, the present inventors have added an olefin-based elastomer together with the polyethylene resin to the layer forming the vapor-deposited film of the base material made of the polyethylene resin, so that the layer and the vapor-deposited film can be attached to each other. It was found that the adhesion can be remarkably improved and the above problem can be solved. The reason why the adhesion to the vapor-deposited film is improved is not clear, but it is considered as follows. Usually, the polyethylene film subjected to the stretching treatment tends to have a reduced adhesion to a vapor-deposited film such as aluminum because the amorphous component is reduced and the oriented crystals are increased. In the present invention, it is considered that by incorporating an olefin-based elastomer together with the polyethylene resin, the orientation crystallization at the time of stretching can be prepared and the adhesion to the vapor-deposited film is maintained.

The present invention has been made based on such findings, and the problem to be solved is that it can be suitably used for producing a monomaterial packaging container, has high adhesion to a vapor-deposited film, and has a high adhesion to a packaging container. It is an object of the present invention to provide a laminated body which can effectively prevent delamination in the case of the above and has a high gas barrier property.

Another problem to be solved by the present invention is to provide a packaging container.

In the first aspect, the laminate of the present invention is a laminate including at least a first sealant layer, a vapor-deposited film, a base material, a gas barrier layer, and a second sealant layer in this order.
The base material comprises a first polyethylene resin layer composed of at least a polyethylene resin having a density of 0.943 g / cm ^{3 or less.}
The base material has been stretched and has been stretched.
The vapor-deposited film is provided on the first polyethylene resin layer of the base material.
The first sealant layer and the second sealant layer are made of a polyethylene resin.

In the second aspect, the laminate of the present invention is a laminate including at least a first sealant layer, a vapor-deposited film, a base material, a gas barrier layer, and a second sealant layer in this order.
The base material comprises at least a first polyethylene resin layer composed of a polyethylene resin and an olefin-based elastomer resin.
The base material has been stretched and has been stretched.
The vapor-deposited film is provided on the first polyethylene resin layer of the base material.
The first sealant layer and the second sealant layer are made of a polyethylene resin.

In one embodiment, the olefin-based elastomer resin is an ethylene-based elastomer resin.

In one embodiment, the olefin-based elastomer resin is an olefin-based block copolymer.

In one embodiment, the olefin-based block copolymer is an ethylene / α-olefin interpolymer.

In one embodiment, the olefin block copolymer comprises a hard block made of polyethylene and a soft block made of an α-olefin interpolymer.

In one embodiment, the content of the olefin-based elastomer resin in the first polyethylene resin layer is 1% by mass or more and 40% by mass or less.

In one embodiment, the gas barrier layer is a five-layer composed of a first polyolefin resin layer, an adhesive resin layer, a layer containing a gas barrier resin, an adhesive resin layer, and a second polyolefin resin layer. Has a configuration.

In one embodiment, the first polyolefin resin layer and the second polyolefin resin layer are composed of a polyethylene resin and a compatibilizer.

In one embodiment, the laminate of the present invention further comprises a barrier coat layer between the first sealant layer and the vapor-deposited film.

In one embodiment, the laminate of the present invention is used in a packaging container.

In one embodiment, the content of the polyethylene resin in the entire laminate is 90% by mass or more.

The packaging container of the present invention is characterized by being made of the above-mentioned laminate.

In one embodiment, the packaging container is a laminated tube.

According to the present invention, it can be suitably used for producing a monomaterial packaging container, the adhesion between layers with a vapor-deposited film can be remarkably improved, and a preferable gas barrier property can be achieved. Can be provided,
Further, according to the present invention, a packaging container can be provided.

It is a schematic cross-sectional view which shows one Embodiment of the laminated body 10 of this invention. It is a schematic structural drawing which shows one Embodiment of a thin-film deposition apparatus. It is a front view which shows the laminated tube 30 which is one Embodiment of the packaging s container of this invention. FIG. 3 is a cross-sectional view taken along the line aa of FIG.

(Laminated body)
As shown in FIG. 1, the laminate 10 of the present invention includes at least a first sealant layer 11, a vapor-deposited film 12, a base material 13, a gas barrier layer 14, and a second sealant layer 15.
The base material included in the laminate, the first sealant layer, and the second sealant layer are made of the same resin, that is, polyethylene resin, and the laminate having such a configuration is a monomaterial packaging container. It can be suitably used as a laminate for production.
Further, the laminate of the present invention has a remarkably improved adhesion between the base material and the vapor-deposited film, and has an extremely high gas barrier property.

The content of the polyethylene resin with respect to the total amount of solids contained in the laminate is preferably 90% by mass or more. This makes it possible to obtain a laminate that can be suitably used for producing a monomaterial packaging container.

Hereinafter, each layer included in the laminated body 10 will be described.

(Base material)
The base material constituting the laminate of the present invention includes a polyethylene resin layer as well as the first and second sealant layers composed of the polyethylene resin described later. As described above, since the base material and the sealant layer are made of the same resin material, the laminate can be used as a highly recyclable material such as a monomaterial packaging container.
The base material may be a single layer or a multi-layered material as long as it includes a polyethylene resin layer, but when the base material is a multi-layered base material, each polyolefin resin such as polyethylene resin is extruded by a separate extruder. It can be produced by a coextrusion method in which it is heated and melted, laminated in a molten state by a method such as a coextrusion multilayer die method or a feed block method, and then formed into a film by an inflation method or a T die method.

For example, in the case of a base material having a multilayer structure formed by a coextrusion method, the second, third, fourth ... Polyethylene resin layers are arranged in order from the first polyethylene resin layer on the side in contact with the vapor deposition film. (Hereinafter, in some cases, it may be referred to as "another polyethylene resin layer"). By providing the other polyethylene resin layer, it is possible to improve the performance such as heat resistance, strength, transparency, and stretchability of the laminate.

In the present invention, the base material is characterized in that it has been stretched. Thereby, the strength and heat resistance of the base material can be improved. It is also possible to improve printability.
The stretching treatment may be uniaxial stretching or biaxial stretching.

The stretching ratio of the base material in the vertical direction (MD direction) and the horizontal direction (TD direction) is preferably 2 times or more and 15 times or less, and preferably 3 times or more and 10 times or less.
By setting the draw ratio to 2 times or more, the strength and heat resistance of the base material can be further improved. In addition, the printability on the base material can be improved. Further, from the viewpoint of the breaking limit of the base material, the draw ratio is preferably 15 times or less.

In the first aspect, the base material includes a first polyethylene resin layer made of a polyethylene resin ^{having a density of 0.943 g / cm 3} or less as a layer on which a vapor-deposited film is formed.

The polyethylene resin having a density of 0.943 g / cm ³ or less contained in the first polyethylene resin layer may be a polyethylene resin derived from biomass, or a polyethylene resin recycled by mechanical recycling or chemical recycling.

The content of the polyethylene resin having a density of 0.943 g / cm ³ or less in the first polyethylene resin layer is preferably 50% by mass or more, more preferably 70% by mass or more, and more preferably 80% by mass or more. It is more preferable, and 90% by mass or more is particularly preferable. By setting the content of the polyethylene resin having a density of 0.943 g / cm ³ or less in the first polyethylene resin layer to 50% by mass or more, the adhesion to the vapor-deposited film can be further significantly improved.

The melting point of the polyethylene resin having a density of 0.943 g / cm ³ or less in the first polyethylene resin layer is preferably 60 ° C. or higher and 135 ° C. or lower, and more preferably 65 ° C. or higher and 130 ° C. or lower. By setting the melting point to 60 ° C. or higher, the printability, strength and heat resistance of the base material can be further improved. By setting the melting point to 135 ° C. or lower, the difference in the appropriate stretching temperature of each layer can be reduced.

The MFR of the polyethylene resin having a density of 0.943 g / cm ³ or less in the first polyethylene resin layer is preferably 0.1 g / 10 min or more and 5 g / 10 min or less, and 0.2 g / 10 min or more and 4 g / 10 min or less. Is more preferable. By setting the MFR to 0.1 g / 10 min or more and 5 g / 10 min or less, the film-forming property of the inflation method is stabilized.

The first polyethylene resin layer can contain a resin material (other resin material) other than the polyethylene resin ^{having a density of 0.943 g / cm 3} or less as long as the characteristics of the present invention are not impaired. From the viewpoint of adhesion to the vapor-deposited film, it is preferable that the first polyethylene resin layer does not contain other resin materials.
Further, the first polyethylene resin layer can contain an additive as long as the characteristics of the present invention are not impaired, and for example, a cross-linking agent, an antioxidant, an anti-blocking agent, a slip agent, and an ultraviolet absorber. , Light stabilizers, fillers, reinforcing agents, antistatic agents, pigments and modifying resins.

In the second aspect, the base material comprises a first polyethylene resin layer composed of a polyethylene resin and an olefin-based elastomer resin.

As the polyethylene resin, high-density polyethylene resin (HDPE), medium-density polyethylene resin (MDPE), low-density polyethylene resin (LDPE), linear low-density polyethylene resin (LLDPE) and ultra-low-density polyethylene resin (VLDPE) are used. can do.
Further, as the polyethylene resin, a copolymer of ethylene and other monomers can also be used.
Further, as the polyethylene resin, a polyethylene resin derived from biomass or a polyethylene resin mechanically recycled or chemically recycled can also be used.

The first polyethylene resin layer can contain a polyethylene resin having a density of 0.970 g / cm ^{3 or less.} By containing the polyethylene resin having a density of 0.970 g / cm ³ or less in the first polyethylene resin layer, the adhesion to the vapor-deposited film can be further remarkably improved.

The melting point of the polyethylene resin contained in the first polyethylene resin layer is preferably 110 ° C. or higher and 140 ° C. or lower, and more preferably 115 ° C. or higher and 135 ° C. or lower. By setting the melting point to 110 ° C. or higher, the processability at the time of producing the laminated body is improved from the viewpoint of heat resistance. By setting the melting point to 140 ° C. or lower, the difference in melting point of each layer in the multilayer structure is small, and stretching tends to be easy at a constant temperature.

The MFR of the polyethylene resin contained in the first polyethylene resin layer is preferably 0.1 g / 10 min or more and 5 g / 10 min or less, and more preferably 0.2 g / 10 min or more and 4 g / 10 min or less. By setting the MFR to 0.1 g / 10 min or more and 5 g / 10 min or less, the film-forming property of the inflation method is stabilized.

The content of the polyethylene resin in the first polyethylene resin layer is preferably 60% by mass or more and 99% by mass or less, and more preferably 70% by mass or more and 95% by mass or less. When the content of the polyethylene resin in the first polyethylene resin layer is 60% by mass or more, a laminate that can be suitably used for producing a monomaterial packaging container can be obtained. Further, when the content of the polyethylene resin in the first polyethylene resin layer is 99% by mass or less, a sufficient amount of the olefin-based elastomer resin can be contained in the first polyethylene resin layer, and the olefin-based elastomer resin can be contained in the first polyethylene resin layer. Adhesion can be improved.

In one embodiment, the olefin-based elastomer resin is an ethylene-based elastomer resin. By using an ethylene-based elastomer resin as the olefin-based elastomer resin, the laminate of the present invention can be suitably used for producing a monomaterial packaging container.

In one embodiment, the olefin-based elastomer resin is an olefin-based block copolymer. By incorporating an olefin-based block copolymer as an olefin-based elastomer resin in the first polyethylene resin layer, the adhesion between the vapor-deposited film and the first polyethylene resin layer can be further improved.
Block copolymers include sequences (blocks or segments) of the same monomeric units covalently attached to different types of sequences. Examples of the form of the block copolymer include AB having a diblock structure and ABA having a triblock structure (where A represents one block and B represents a different block or segment). Can be mentioned. Also, in multi-block copolymers, A and B can be connected in many different ways and repeated multiple times. It can also further include different types of additional blocks or segments. The multi-block copolymer may be a linear multi-block polymer or a multi-block star polymer (all blocks or segments bonded to the same atom or chemical moiety).

In one embodiment, the olefin block copolymer is an ethylene block copolymer, preferably an ethylene multiblock copolymer. By using an ethylene-based block copolymer as the olefin-based block copolymer, the laminate of the present invention can be suitably used for producing a monomaterial packaging container.

In one embodiment, the ethylene-based block copolymer is an ethylene / α-olefin interpolymer, and by using the ethylene / α-olefin interpolymer, the adhesion between the vapor deposition film and the first polyethylene resin layer is further improved. can do. The ethylene / α-olefin interpolymer includes ethylene and one or more copolymerizable α-olefin monomers in a polymerized form. Further, the interpolymer means a polymer prepared by polymerizing at least two kinds of monomers. Therefore, the interpolymer includes a copolymer which is a polymer of two kinds of monomers, a terpolymer which is a polymer of three kinds of monomers, and a polymer which is a polymer of four kinds or more kinds of monomers.

In one embodiment, the ethylene / α-olefin interpolymer, which is an ethylene-based block copolymer, comprises a hard block (hard segment) composed of polyethylene and a soft block (soft segment) composed of an α-olefin monomer.

Examples of the α-olefin monomer constituting the interpolymer include propylene, 1-butene, 1-pentene, 3-methyl-1-butene, 1-hexene, 4-methyl-1-pentene, 3-methyl-1-pentene, and the like. 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-eicosene, cyclopentene, cycloheptene, norbornene, 5-methyl-2-norbornene, tetracyclododecene, 2-methyl-1,4 , 5,8-Dimethano-1,2,3,4,4a, 5,8,8a-Octahydronaphthalene, butadiene, isopene, 4-methyl-1,3-pentadiene, 1,3-pentadiene, 1,4 -Pentadiene, 1,5-hexadiene, 1,4-hexadiene, 1,3-hexadiene, 1,3-octadene, 1,4-octadien, 1,5-octadien, 1,6-octadien, 1,7-octadien , Etiriden norbornene, vinyl norbornene, dicyclopentadiene, 7-methyl-1,6-octadiene, 4-ethylidene-8-methyl-1,7-nonadien, 5,9-dimethyl-1,4,8-decatorien, 3 Included are −phenylpropene, 4-phenylpropene, 1,2-difluoroethylene, tetrafluoroethylene, styrene, and 3,3,3-trifluoro-1-propene.

As the olefin-based elastomer resin, a commercially available one may be used. For example, as an olefin-based block copolymer comprising a hard block composed of polyethylene and a soft block composed of α-olefin monomer, Dow Chemical Co., Ltd. INFUSE 9100 manufactured by INFUSE 9100 can be used.
Further, Toughmer A-4085S manufactured by Mitsui Chemicals, Inc. can also be used.

The content of the olefin-based elastomer resin in the first polyethylene resin layer is preferably 1% by mass or more and 40% by mass or less, and more preferably 5% by mass or more and 30% by mass or less. When the content of the olefin-based elastomer resin in the first polyethylene resin layer is 1% by mass or more, the adhesion between the first polyethylene resin layer and the vapor-deposited film can be further improved. Further, when the content of the olefin-based elastomer resin in the first polyethylene resin layer is 40% by mass or less, a laminate that can be suitably used for producing a monomaterial packaging container can be obtained.

The first polyethylene resin layer may contain a resin material (other resin material) other than the polyethylene resin as long as the characteristics of the present invention are not impaired. From the viewpoint of adhesion to the vapor-deposited film and recyclability, the first polyethylene resin layer preferably does not contain other resin materials.
Further, the first polyethylene resin layer can contain an additive as long as the characteristics of the present invention are not impaired, and for example, a cross-linking agent, an antioxidant, an anti-blocking agent, a slip agent, and an ultraviolet absorber. , Light stabilizers, fillers, reinforcing agents, antistatic agents, pigments and modifying resins.

The other polyethylene resin layer is made of polyethylene resin.
As the polyethylene resin, high-density polyethylene resin (HDPE), medium-density polyethylene resin (MDPE), low-density polyethylene resin (LDPE), linear low-density polyethylene resin (LLDPE) and ultra-low-density polyethylene resin (VLDPE) are used. can do.
Further, as the polyethylene resin, a copolymer of ethylene and other monomers can also be used.
Further, as the polyethylene resin, a polyethylene resin derived from biomass or a polyethylene resin mechanically recycled or chemically recycled can also be used.

In the base material having a multi-layer structure, the densities of the polyethylene resins constituting the adjacent layers may be the same or different. That is, the polyethylene resin layer constituting the base material may be provided with a density gradient.
In a polyethylene resin layer provided with a density gradient, if the density difference between the layers is large, peeling (delamination) may occur at the interface. Therefore, the density difference between the layers is preferably at 0.05 g / cm ³ or less, further preferably 0.04 g / cm ³ or less.

(A) In one embodiment, the base material having a multilayer structure is composed of a first polyolefin resin layer, a second polyethylene resin layer composed of a medium-density polyethylene resin, and a linear low-density polyethylene resin. It has a five-layer structure consisting of a third polyethylene resin layer, a fourth polyethylene resin layer composed of a medium-density polyethylene resin, and a fifth polyolefin resin layer composed of a high-density polyethylene resin.
(B) In one embodiment, the base material having a multilayer structure includes a first polyethylene resin layer, a second resin layer composed of a blended resin of a high-density polyethylene resin and a medium-density polyethylene resin, and a medium-density polyethylene. A third polyethylene resin layer composed of a resin, a fourth polyethylene resin layer composed of a linear low-density polyethylene resin, a fifth polyethylene resin layer composed of a medium-density polyethylene resin, and a high density. It has a seven-layer structure consisting of a sixth resin layer composed of a blended resin of polyethylene resin and a medium-density polyethylene resin, and a seventh polyolefin resin layer composed of a high-density polyethylene resin.
(C) In one embodiment, the base material having a multilayer structure is composed of a first polyethylene resin layer, a second polyethylene resin layer composed of a linear low-density polyethylene resin, and a medium-density polyethylene resin. It has a three-layer structure with a third polyethylene resin layer.
(D) In one embodiment, the base material having a multilayer structure has a two-layer structure of a first polyethylene resin layer and a second polyolefin resin layer composed of a medium-density polyethylene resin.
(E) In one embodiment, the base material having a multilayer structure includes a first polyethylene resin layer containing an olefin-based elastomer resin, a second polyolefin resin layer composed of a medium-density polyethylene resin, and a linear low. A third polyolefin resin layer composed of a density polyethylene resin, a fourth polyolefin resin layer composed of a medium density polyethylene resin, and a fifth polyolefin resin layer composed of an olefin elastomer resin and a medium density polyethylene resin. It has a five-layer structure of

As one embodiment of the multi-layered base material by the coextrusion method as described above, for example, each resin is heated and melted by an extruder, and five layers composed of the first to fifth polyethylene resin layers are formed by the feed block method. After laminating, a tube-shaped film is formed by an inflation method, and the insides of the tubes are crimped to each other with a rubber roll or the like to form a 10-layer multilayer film. The multilayer film thus obtained has a vertically symmetrical layer structure in the cross-sectional thickness direction. That is, for example, when five layers composed of the first to fifth polyethylene resin layers are laminated by a coextruder, the obtained laminated films are obtained in the order of the first, second, third, fourth, and fifth layers from the surface. It is a base material having a layer structure of 10 layers composed of / 5th / 4th / 3rd / 2nd / 1st polyethylene resin layers. However, in reality, since the fifth polyethylene resin layer of the two adjacent layers in the center in the thickness cross-sectional direction can be regarded as one layer, it is substantially the 1st / 2nd / 3rd / 4th / 5th / 4th. It can be a base material having a multi-layer structure of 9 layers composed of / 3rd / 2nd / 1st polyethylene resin layers.
The multilayer structure film obtained by such a production method is sometimes referred to as a "block film". According to the above-mentioned production method, the number of defective products in production can be remarkably reduced, and finally the production efficiency can be improved.

The base material may have a printing layer on its surface, and the image formed on the printing layer is not particularly limited, and characters, patterns, symbols, combinations thereof, and the like are represented.
The print layer can be formed on the substrate by using an ink derived from biomass. As a result, the environmental load can be reduced.
The method for forming the print layer is not particularly limited, and examples thereof include conventionally known printing methods such as a gravure printing method, an offset printing method, and a flexographic printing method.

Further, the base material may be surface-treated. Thereby, the adhesion with the adjacent layer can be improved.
The surface treatment method is not particularly limited, for example, corona discharge treatment, ozone treatment, low temperature plasma treatment using oxygen gas and / or nitrogen gas, physical treatment such as glow discharge treatment, and oxidation using chemicals. Examples include chemical treatment such as treatment.

The thickness of the base material is preferably 1 μm or more and 60 μm or less, more preferably 9 μm or more and 60 μm or less, and further preferably 12 μm or more and 50 μm or less, regardless of whether the base material has a single-layer structure or a multi-layer structure. By setting the thickness of the base material to 1 μm or more, the heat resistance and strength of the base material can be improved. By setting the thickness of the base material to 60 μm or less, the processability of the base material can be improved.

(Embedded film)
The laminate includes a thin-film deposition film on the first polyethylene resin layer of the base material. Thereby, the gas barrier property of the laminated body, specifically, the oxygen barrier property and the water vapor barrier property can be improved.

The thin-film deposition film may be composed of a metal or an inorganic oxide, but it is possible to impart a glossy feeling to a container produced by using the laminate of the present invention. A vapor-deposited film made of a metal (hereinafter referred to as a metal-deposited film) is preferable because it can be formed and its design can be improved.
Examples of the metal constituting the metal vapor deposition film include aluminum, chromium, tin, nickel, copper, silver, gold and platinum.
Examples of the metal oxide include aluminum oxide, silicon oxide, magsium oxide, calcium oxide, zirconium oxide, titanium oxide, boron oxide, hafnium oxide and barium oxide.

Among the above, aluminum is particularly preferable because it has a high gas barrier property and can impart a good glossiness.

The surface of the vapor-deposited film is preferably subjected to the above surface treatment. Thereby, the adhesion with the adjacent layer can be improved.

The thickness of the thin-film deposition film is preferably 1 nm or more and 150 nm or less, more preferably 5 nm or more and 60 nm or less, and further preferably 10 nm or more and 40 nm or less.
By setting the thickness of the thin-film deposition film to 1 nm or more, the gas barrier property and glossiness of the laminated body 20 can be further improved.
Further, by setting the thickness of the thin-film deposition film to 150 nm or less, a laminate that can be suitably used for manufacturing a monomaterial packaging container can be obtained. Further, it is possible to prevent the occurrence of cracks in the vapor-deposited film.

As a method for forming the vapor deposition film, a conventionally known method can be adopted, for example, a physical vapor deposition method (Physical Vapor Deposition method, PVD method) such as a vacuum vapor deposition method, a sputtering method, or an ion plating method, or plasma chemical vapor deposition. Examples thereof include chemical vapor deposition methods (Chemical Vapor Deposition method, CVD method) such as phase growth method, thermochemical vapor deposition method, and photochemical vapor deposition method.
Hereinafter, one embodiment of the method for forming the thin-film deposition film will be shown, but the method for forming the thin-film deposition film is not limited thereto.

Specifically, (1) a vacuum vapor deposition method in which a metal or an oxide of a metal is used as a raw material, which is heated and vaporized, and this is vapor-deposited on a first polyethylene resin layer provided on a base material, (2) a raw material. Oxidation reaction vapor deposition method in which a metal or metal oxide is used as an oxide and oxygen is introduced to oxidize and vapor-deposited on the first polyethylene resin layer provided on the base material. A thin-film deposition film can be formed by using the above-mentioned oxidation reaction vapor deposition method or the like. In the above, as the heating method of the vapor-deposited material, for example, a resistance heating method, a high frequency induction heating method, an electron beam heating method (EB) or the like can be used.

The method of forming a vapor-deposited film of an inorganic substance and an inorganic oxide by the physical vapor deposition method will be described below.
FIG. 2 is a schematic configuration diagram showing an example of a take-up type vacuum vapor deposition apparatus. As shown in FIG. 2, in the vacuum chamber-B of the take-up type vacuum vapor deposition apparatus A, the base material X unwound from the unwinding roll C is cooled by the guide rolls D and E. Guided by drum F.
In one embodiment, in the device A, a plasma processing device G is arranged between the guide roll E and the cooled coating drum F. The plasma processing apparatus G irradiates the surface of the first polyethylene resin layer included in the base material X with plasma gas, and plasma the surface of the first polyethylene resin layer included in the base material X before forming the vapor deposition film. It is to be processed.
Next, a thin-film deposition source I (for example, metallic aluminum, aluminum oxide, etc.) heated and evaporated by the crucible H is placed on the first polyethylene resin layer provided by the base material guided on the cooled coating drum F. Accumulates to form a vapor deposition film. The deposition of the vapor deposition source I may be carried out through the masks J and J, and if necessary, oxygen gas or the like may be ejected from the oxygen gas outlet K.
Next, the base material X on which the vapor-deposited film is formed is sent out via the guide rolls L and M and wound around the take-up roll N to complete the thin-film deposition film formation by the present apparatus.
By repeating the above steps, a multi-layered vapor-deposited film formed of different materials may be obtained. The thin-film deposition film having a multi-layer structure may be formed by using the above-mentioned device a plurality of times, or may be formed by using a device in which a plurality of the above-mentioned devices are connected.
The formation of such a thin-film film is disclosed in, for example, Japanese Patent No. 4569982.

(First and second sealant layers)
In one embodiment, the first and second sealant layers can be formed of a resin material that can be fused to each other by heat, eg, low density polyethylene resin (LDPE), medium density polyethylene (MDPE) resin, etc. High density polyethylene resin (HDPE), linear (linear) low density polyethylene resin (LLDPE), ethylene-α / olefin copolymer polymerized using metallocene catalyst, random or block copolymer of ethylene / polypropylene , Polypropylene resin, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA), ethylene-ethyl acrylate copolymer (EEA), ethylene-methacrylate copolymer (EMAA), ethylene -Methyl methacrylate copolymer (EMMA), ionomer resin, heat-sealing ethylene-vinyl alcohol resin, polyolefin resins such as these acid-modified products, vinyl resins, (meth) acrylic resins and the like can be mentioned.
Among the above, polyethylene resin is particularly preferable because it can be a laminate 20 that can be suitably used for producing a monomaterial packaging container.

The content of the polyethylene resin in the sealant layer is preferably 80% by mass or more, and more preferably 90% by mass or more. This makes it possible to obtain a laminate that can be suitably used for producing a monomaterial packaging container.

The sealant layer can contain the above-mentioned additives as long as the characteristics of the present invention are not impaired.

The sealant layer may have a single-layer structure or may have a multi-layer structure.

The thickness of the sealant layer is preferably 20 μm or more and 100 μm or less, and more preferably 30 μm or more and 70 μm or less.
By setting the thickness of the sealant layer to 20 μm or more, the lamination strength of the packaging container can be further improved.
Further, by setting the thickness of the sealant layer to 100 μm or less, the moldability of the laminated body can be improved, and the packaging container can be manufactured more easily.

The first sealant layer and the second sealant layer may have the same structure or different structures.

The sealant layer can be produced by extruding the above-mentioned material by a conventionally known method such as a T-die method or an inflation method.

The sealant layer can be laminated via a conventionally known adhesive, a molten resin layer, or the like.

(Gas barrier layer)
The laminate of the present invention includes a gas barrier layer, whereby the gas barrier property of the laminate of the present invention can be improved.

The gas barrier layer includes at least a layer containing a gas barrier resin. Examples of the gas barrier resin include polyamides and polyesters such as ethylene-vinyl alcohol copolymer (EVOH), polyvinyl alcohol, polyacrylonitrile, nylon 6, nylon 6,6 and polymethoxylylen adipamide (MXD6). Examples thereof include polyurethane and (meth) acrylic resin, and among these, EVOH is preferable from the viewpoint of oxygen barrier property and water vapor barrier property.

The content of the gas barrier resin in the layer containing the gas barrier resin is preferably 50% by mass or more, and more preferably 75% by mass or more.
By setting the content of the gas barrier resin in the layer containing the gas barrier resin to 50% by mass or more, the oxygen barrier property and the water vapor barrier property of the laminate of the present invention can be further improved.

The layer containing the gas barrier resin can contain the above additives as long as the characteristics of the present invention are not impaired.

The thickness of the layer containing the gas barrier resin is preferably 0.5 μm or more and 20 μm or less, and more preferably 1 μm or more and 16 μm or less.
By setting the thickness of the layer containing the gas barrier resin to 0.5 μm or more, the oxygen barrier property and the water vapor barrier property of the laminate of the present invention can be improved. Further, by setting the thickness of the layer containing the gas barrier resin to 20 μm or less, a laminate that can be suitably used for manufacturing a monomaterial packaging container can be obtained.

In one embodiment, the gas barrier layer has a multi-layer structure.
In one embodiment, as shown in FIG. 1, the gas barrier layer 14 includes a first polyolefin resin layer 16, an adhesive resin layer 17, a layer 18 containing a gas barrier resin, an adhesive resin layer 19, and a first. It has a five-layer structure of two polyolefin resin layers 20.

(First and Second Polyolefin Resin Layers)
The first and second polyolefin resin layers are composed of polyolefin, and examples thereof include polyethylene resin, polypropylene resin, polymethylpentene, ethylene-propylene copolymer and propylene-butene copolymer, among which recycled materials are used. From the viewpoint of suitability, polyethylene resin is preferable.

In one embodiment, the first and second polyolefin resin layers contain a compatibilizer, whereby a gas barrier resin is used when the packaging container produced by using the laminate of the present invention is heated and melted and recycled. And the polyethylene resin are uniformly mixed, and it is possible to effectively prevent the physical properties from being deteriorated. In addition, it is possible to effectively prevent the transparency from being lowered.

As the compatibilizer, conventionally known ones can be appropriately selected and used, but from the viewpoint of recyclability, unsaturated carboxylic acid-modified polyolefin resin is preferable, and maleic anhydride-modified polyethylene resin is more preferable.

The content of the compatibilizer in the first and second polyolefin resin layers is preferably 5% by mass or more and 30% by mass or less.
The above effect can be further improved by setting the content of the compatibilizer in the first and second polyolefin resin layers to 5% by mass or more.
By setting the content of the compatibilizer in the first and second polyolefin resin layers to 30% by mass or less, the strength and heat resistance of the base material can be improved.

As long as the characteristics of the present invention are not impaired, the first and second polyethylene resin layers may contain a resin material other than the polyolefin resin, for example, (meth) acrylic resin, vinyl resin, cellulose resin, polyamide resin. , Polyethylene resin, ionomer resin and the like.
From the viewpoint of recycling suitability, the first and second polyolefin resin layers are particularly preferably free of resins other than polyethylene resin.

In addition, the first and second polyethylene resin layers can contain the above additives as long as the characteristics of the present invention are not impaired.

The thickness of the first and second polyolefin resin layers is preferably 5 μm or more and 100 μm or less, and more preferably 10 μm or more and 50 μm or less. By setting the thickness of the polyolefin resin layer to 5 μm or more, the strength and heat resistance of the laminate of the present invention can be improved. By setting the thickness of the polyolefin resin layer to 100 μm or less, the processability of the laminate of the present invention can be improved.

The configurations of the first and second polyolefin resin layers may be the same or different.

(Adhesive resin layer)
The adhesive resin layer contains at least one resin material, and examples thereof include a polyolefin resin, a modified polyolefin resin, a polyester resin, a vinyl resin, and a polyamide resin. Among these, polyolefin resins and modified polyolefin resins are preferable from the viewpoint of adhesion.

The adhesive resin layer can contain the above additives as long as the characteristics of the present invention are not impaired.

The thickness of the adhesive resin is preferably 0.5 μm or more and 10 μm or less, and more preferably 1 μm or more and 5 μm or less.
By setting the thickness of the adhesive resin layer to 0.5 μm or more, the adhesion between the gas barrier resin layer and the polyolefin resin layer can be improved. Further, by setting the thickness of the adhesive resin layer to 10 μm or less, a laminate that can be suitably used for manufacturing a monomaterial packaging container can be obtained.

The gas barrier layer can be produced by extruding the above-mentioned material by a conventionally known method such as a T-die method or an inflation method.

The gas barrier layer can be laminated via a conventionally known adhesive, a molten resin layer, or the like.

(Barrier coat layer)
The laminate of the present invention may further include a barrier coat layer on the vapor-deposited film (between the first sealant layer and the vapor-deposited film, or between the vapor-deposited film and the substrate). Thereby, the gas barrier property of the laminated body can be improved.

In one embodiment, the barrier coat layer is a polyamide resin such as ethylene-vinyl alcohol copolymer (EVOH), polyvinyl alcohol, polyacrylonitrile, nylon 6, nylon 6,6 and polymethoxylylen adipamide (MXD6), polyester. It is composed of a resin, a polyurethane resin, and a gas barrier resin such as a (meth) acrylic resin.

The thickness of the barrier coat layer is preferably 0.01 μm or more and 10 μm or less, and more preferably 0.1 μm or more and 5 μm or less.
By setting the thickness of the barrier coat layer to 0.01 μm or more, the gas barrier property can be further improved. By setting the thickness of the barrier coat layer to 10 μm or less, the processability of the laminated body can be improved. Further, it can be a laminate that can be suitably used for manufacturing a monomaterial packaging container.

The barrier coat layer can be formed by dissolving or dispersing the above-mentioned material in water or a suitable solvent, applying the material, and drying the material.

In another embodiment, the barrier coat layer is a metal alkoxide obtained by polycondensing a mixture of a metal alkoxide and a water-soluble polymer by a sol-gel method in the presence of a sol-gel method catalyst, water, an organic solvent, or the like. A gas barrier coating film containing at least one resin composition such as a hydrolyzate of the above or a hydrolyzed condensate of a metal alkoxide.
By providing such a barrier coat layer on the vapor-deposited film, it is possible to effectively prevent the occurrence of cracks in the vapor-deposited film.

In one embodiment, the metal alkoxide is represented by the following general formula.
R ¹ _n M (OR ² ) _m
(However, in the formula, R ¹ and R ² each represent an organic group having 1 to 8 carbon atoms, M represents a metal atom, n represents an integer of 0 or more, and m represents an integer of 1 or more. , N + m represents the valence of M.)

As the metal atom M, for example, silicon, zirconium, titanium, aluminum and the like can be used.
Examples of the organic group represented by R ¹ and R ² include alkyl groups such as methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group and i-butyl group. Can be done.

Examples of the metal alkoxide satisfying the above general formula include tetramethoxysilane (Si (OCH ₃ ) ₄ ), tetraethoxysilane (mass%) Si (OC ₂ H ₅ ) ₄ ), and tetrapropoxysilane (Si (OC ₃ H)). ₇ ) ₄ ), tetrabutoxysilane (Si (OC ₄ H ₉ ) ₄ ) and the like can be mentioned.

Further, it is preferable to use a silane coupling agent together with the above metal alkoxide.
As the silane coupling agent, known organic reactive group-containing organoalkoxysilanes can be used.

As the water-soluble polymer, polyvinyl alcohol and ethylene-vinyl alcohol copolymer are preferable, and from the viewpoint of oxygen barrier property, water vapor barrier property, water resistance and weather resistance, it is preferable to use these in combination.

The thickness of the gas barrier coating film is preferably 0.01 μm or more and 10 μm or less, and more preferably 0.1 μm or more and 5 μm or less. Thereby, the gas barrier property can be further improved.
By setting the thickness of the gas barrier coating film to 0.01 μm or more, the oxygen barrier property and the water vapor barrier property of the barrier laminate can be improved. In addition, it is possible to prevent the occurrence of cracks in the vapor-deposited film.
By setting the thickness of the gas barrier coating film to 10 μm or less, the laminate 20 can be suitably used for producing a monomaterial packaging container.

The gas barrier coating film is prepared by applying a composition containing the above materials by a conventionally known means such as a roll coating such as a gravure roll coater, a spray coating, a spin coating, dipping, a brush, a bar code, and an applicator, and the composition thereof. The product can be formed by polycondensing the product by the sol-gel method.
As the sol-gel method catalyst, an acid or amine compound is suitable.

The composition may further contain an acid. The acid is used as a catalyst for the sol-gel method, mainly as a catalyst for hydrolysis of alkoxides, silane coupling agents and the like.
As the acid, mineral acids such as sulfuric acid, hydrochloric acid and nitric acid, and organic acids such as acetic acid and tartaric acid are used.

Moreover, the said composition may contain an organic solvent. As the organic solvent, for example, methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butanol and the like can be used.

Hereinafter, an embodiment of a method for forming a gas barrier coating film will be described below.
First, a composition is prepared by mixing a metal alkoxide, a water-soluble polymer, a sol-gel method catalyst, water, an organic solvent and, if necessary, a silane coupling agent. The polycondensation reaction gradually proceeds in the composition.
Next, the composition is applied and dried on the thin-film deposition film by the above-mentioned conventionally known method. By this drying, the polycondensation reaction of the alkoxide and the water-soluble polymer (and the silane coupling agent if the composition contains a silane coupling agent) further proceeds to form a layer of the composite polymer. Finally, by heating, a gas barrier coating film can be formed.

(Packaging container)
The packaging container of the present invention is characterized by being made of the above-mentioned sealant laminate 30.

Specific examples of the packaging container of the present invention include a laminated tube, a packaging bag, and a lid material.

(Laminate tube)
In one embodiment, the packaging container of the present invention is a laminated tube 30.
Hereinafter, the laminated tube 30 of the present invention will be described with reference to the drawings. FIG. 3 is a diagram simply showing the configuration of the laminated tube 30, and FIG. 4 is a cross-sectional view taken along the line aa of FIG. As shown in FIG. 3, the laminated tube 30 includes a laminated tube main body 31 including a head portion 32 and a body portion 33, and the body portion 33 is characterized by being composed of the laminated body.

(head)
The head portion 32 includes a shoulder portion 34 connected to one end of the body portion 33 and an extraction port portion 35 connected to the shoulder portion 34.
Further, in one embodiment, the spout portion 35 includes a screw thread 37 for screwing the cap 36.

In one embodiment, the head 32 is made of polyethylene resin, which can improve the recyclability of the laminated tube. As the polyethylene resin, a high-density polyethylene resin, a medium-density polyethylene resin, a low-density polyethylene resin, a linear low-density polyethylene resin, and an ultra-low-density polyethylene resin can be used.
Among these, high-density polyethylene resin is preferable from the viewpoint of shape retention.
Further, as the polyethylene resin, a polyethylene resin derived from biomass or a polyethylene resin recycled by mechanical recycling or chemical recycling can be used.
The head 43 may contain the above-mentioned additive as long as the specification of the present invention is not impaired.

The method for producing the head 32 is not particularly limited, and the head 32 can be produced by a conventionally known method. For example, the head 32 can be manufactured by a compression molding method (compression molding method) or an injection molding method (injection molding method), and can be joined to the body portion.

When manufacturing a laminated tube 30 by using a compression molding method (compression molding method), after mounting the body 33 on a male mold having a convex portion at the upper part, the male mold and the female mold are opposed to each other, and the male mold and the female mold are opposed to each other. , A material such as molten polyethylene resin is supplied, and the head portion 32 is formed by compression molding and joined to one opening of the body portion 33 to form a laminated tube 30 composed of the head portion 32 and the body portion 33. Can be manufactured.
Further, when the laminated tube 30 is manufactured by an injection molding method (injection molding method), the body 33 is attached to a male mold having a convex portion at the upper part, and then the male mold and the female mold are opposed to each other and melted from the gate. A laminated tube composed of a head portion 32 and a body portion 33 is manufactured by supplying a material such as polyethylene resin obtained from the above, injection molding the head portion 32, and joining the head portion 33 to one opening of the body portion 33. Can be done.

(Torso)
In the laminated tube main body 31 of the present invention, the body portion 33 is connected to the shoulder portion 34 of the head portion 32.
The body portion 33 forms a welded portion 38 formed by rolling the laminate into a tubular shape, superimposing the first sealant layer and the second sealant layer, and heat-sealing the overlapped portion. Can be obtained by
Further, the body portion 33 includes a bottom seal portion 39 formed by heat-sealing the opening of the rolled laminate.

As a heat sealing method, a conventionally known method such as a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, an ultrasonic seal, and a flame seal can be used.

(cap)
The laminated tube 30 can include a cap 36.
The cap is detachably attached to the extraction port of the head and plays a role of closing the extraction port.
The cap is made of a thermoplastic resin.
Examples of the thermoplastic resin include polyolefin resins such as polyethylene and polypropylene, polyester, cellulose resin, vinyl resin and the like, but polyethylene resin is particularly preferable from the viewpoint of recyclability.
Further, the cap 36 can also contain the above-mentioned additive as long as the characteristics of the present invention are not impaired.

As shown in FIG. 3, the cap may be of a screw type having a concave groove on the inner surface of the cap 36 so as to be screwed into the thread 37 of the extraction port portion 35, and the extraction port portion 37 may be used. It may be a plug type that is fitted by plugging in.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the following Examples.
The materials used in the following examples are as follows.
-Polyethylene resin A: manufactured by Dow Chemical, ELITE5960G, HDPE, density 0.962 g / cm ³ , melting point 134 ° C., MFR 0.85 g / 10 min
-Polyethylene resin B: manufactured by Dow Chemical, ELITE5538G, MDPE, density 0.941 g / cm ³ , melting point 129 ° C, MFR 1.3 g / 10 min
-Polyethylene resin C: manufactured by Dow Chemical, Infinity PL1880G, m-C8-LLDPE, density 0.902 g / cm ³ , melting point 99 ° C, MFR 1.0 g / 10 min
-Olefin-based elastomer resin A: manufactured by Dow Chemical, INFUSE9100, olefin-based block copolymer (with polyethylene as a hard block and α-olefin-based elastomer resin as a soft block), density 0.877 g / cm ³ , melting point 120 ° C., MFR 1.0g / 10min

Example 1-1
The polyethylene resin B was co-extruded into two layers by an inflation molding method to obtain a film composed of a first polyethylene resin layer (10 μm) and a second polyethylene resin layer (115 μm).
This film was stretched 5 times in the longitudinal direction (MD) to obtain a stretched base material having a thickness of 25 μm. The thickness after stretching was 2 μm for the first polyethylene resin layer and 23 μm for the second polyethylene resin layer.

An Al-deposited film having a thickness of 30 nm was formed on the surface of the first polyethylene resin layer of the stretched base material produced as described above by the PVD method to obtain a vapor-deposited base material. The optical density (OD value) of the formed vapor-film film was measured and found to be 3.0.

As the first sealant layer
Linear low-density polyethylene resin D (Dow Chemical, Dowlex2098P, density 0.926 g / cm ³ ) and
High-density polyethylene resin (Prime Polymer Co., Ltd. Hi-Zex 3300F, density 0.950 g / cm ³ ) and
Linear low-density polyethylene resin D (Dow Chemical, Dowlex2098P, density 0.926 g / cm ³ ) and
Was coextruded by an inflation method to obtain a first sealant layer having a thickness of 100 μm.
In the first sealant layer thus obtained, the thickness of the layer made of the linear low-density polyethylene resin D is 20 μm, the thickness of the layer made of the high-density polyethylene resin is 60 μm, and the straight chain. The thickness of the layer composed of the low-density polyethylene resin D was 20 μm.

A urethane adhesive (RU004 / H1 manufactured by Rock Paint Co., Ltd.) is applied to the vapor-deposited surface of the base material and dried to form an adhesive layer having a thickness of 3 μm, and the first sealant is formed through the adhesive layer. The layer side composed of the linear low-density polyethylene resin D of the layer was bonded.

Linear low-density polyethylene resin E (manufactured by Dow Chemical, Dowlex 2045G, density 0.920 g / cm ³ ) and
Adhesive resin (manufactured by Mitsui Chemicals, Admer NF557, density 0.903 g / cm ³ ) and
Ethylene-vinyl alcohol copolymer (manufactured by Kuraray, EVAL H171B, density 1.17 g / cm ³ , ethylene content 38 mol%) and
Adhesive resin (manufactured by Mitsui Chemicals, Admer NF557, density 0.903 g / cm ³ ) and
Linear low-density polyethylene resin E (manufactured by Dow Chemical, Dowlex 2045G, density 0.920 g / cm ³ ) and
Was co-extruded into 5 layers by the inflation method to obtain a gas barrier layer.
The gas barrier layer obtained as described above includes a layer composed of a linear low-density polyethylene resin E having a thickness of 17.5 μm, a layer composed of an adhesive resin having a thickness of 5 μm, and a thickness of 15 μm. A layer composed of an ethylene-vinyl alcohol copolymer, a layer composed of an adhesive resin having a thickness of 5 μm, and a layer composed of a linear low-density polyethylene resin E having a thickness of 17.5 μm. It had a five-layer structure having a total thickness of 60 μm.

Low-density polyethylene (Novatec LC600A, density 0.918 g / cm ³ ) manufactured by Nippon Polyethylene Co., Ltd. is melt-extruded onto a non-deposited film provided on the base material to form a melt-extruded polyethylene layer with a thickness of 20 μm, and this melt-extruded. The layer side of the gas barrier layer made of the linear low-density polyethylene resin E was laminated via the polyethylene layer.

As a second sealant layer
Linear low-density polyethylene resin D (Dow Chemical, Dowlex2098P, density 0.926 g / cm ³ ) and
High-density polyethylene resin (Prime Polymer Co., Ltd., Hi-Zex 3300F, density 0.950 g / cm ³ ) and
Linear low-density polyethylene resin D (Dow Chemical, Dowlex2098P, density 0.926 g / cm ³ ) and
Was coextruded by an inflation method to obtain a second sealant layer having a thickness of 100 μm.
In the second sealant layer thus obtained, the thickness of the layer made of the linear low-density polyethylene resin D is 20 μm, the thickness of the layer made of the high-density polyethylene resin is 60 μm, and the straight chain. The thickness of the layer composed of the low-density polyethylene resin D was 20 μm.

^{A low-density polyethylene resin (Novatec LC600A, density 0.918 g / cm 3} ) manufactured by Nippon Polyethylene Co., Ltd. is melt-extruded onto a layer composed of the other linear low-density polyethylene resin E provided in the gas barrier layer, and has a thickness of 20 μm. The melt-extruded polyethylene layer of the above is formed, and the second sealant layer is bonded to the layer side composed of the linear low-density polyethylene resin D through the melt-extruded polyethylene layer to obtain the laminate of the present invention. rice field.
The content of polyethylene in this laminate was 90% by mass.

Examples 1-2-1-5
A laminate was produced in the same manner as in Example 1-1, except that the structure of the first polyethylene resin layer was changed as shown in Table 1.

Example 2-1
Polyethylene resin B is coextruded into a three-layer coextrusion film by an inflation molding method to obtain a film composed of a first polyethylene resin layer (10 μm), a second polyethylene resin layer (105 μm), and a third polyethylene resin layer (10 μm). rice field.
This film was stretched 5 times in the longitudinal direction (MD) to obtain a stretched base material having a thickness of 25 μm. The thickness after stretching was 2 μm for the first polyethylene resin layer, 21 μm for the second polyethylene resin layer, and 2 μm for the third polyethylene resin layer.

An Al-deposited film having a thickness of 30 nm was formed on the surface of the first polyethylene resin layer of the stretched base material produced as described above by the PVD method to obtain a vapor-deposited base material. The optical density (OD value) of the formed vapor-film film was measured and found to be 3.0.

As the first sealant layer
Linear low-density polyethylene resin D (Dow Chemical, Dowlex2098P, density 0.926 g / cm ³ ) and
High-density polyethylene resin (Prime Polymer Co., Ltd. Hi-Zex 3300F, density 0.950 g / cm ³ ) and
Linear low-density polyethylene resin D (Dow Chemical, Dowlex2098P, density 0.926 g / cm ³ ) and
Was coextruded by an inflation method to obtain a first sealant layer having a thickness of 100 μm.
In the first sealant layer thus obtained, the thickness of the layer made of the linear low-density polyethylene resin D is 20 μm, the thickness of the layer made of the high-density polyethylene resin is 60 μm, and the straight chain. The thickness of the layer composed of the low-density polyethylene resin D was 20 μm.

A urethane adhesive (RU004 / H1 manufactured by Rock Paint Co., Ltd.) is applied to the vapor-deposited surface of the base material and dried to form an adhesive layer having a thickness of 3 μm, and the first sealant is formed through the adhesive layer. The layer side composed of the linear low-density polyethylene resin D of the layer was bonded.

Linear low-density polyethylene resin E (manufactured by Dow Chemical, Dowlex 2045G, density 0.920 g / cm ³ ) and
Adhesive resin (manufactured by Mitsui Chemicals, Admer NF557, density 0.903 g / cm ³ ) and
Ethylene-vinyl alcohol copolymer (manufactured by Kuraray, EVAL H171B, density 1.17 g / cm ³ , ethylene content 38 mol%) and
Adhesive resin (manufactured by Mitsui Chemicals, Admer NF557, density 0.903 g / cm ³ ) and
Linear low-density polyethylene resin E (manufactured by Dow Chemical, Dowlex 2045G, density 0.920 g / cm ³ ) and
Was co-extruded into 5 layers by the inflation method to obtain a gas barrier layer.
The gas barrier layer obtained as described above includes a layer composed of a linear low-density polyethylene resin E having a thickness of 17.5 μm, a layer composed of an adhesive resin having a thickness of 5 μm, and a thickness of 15 μm. A layer composed of an ethylene-vinyl alcohol copolymer, a layer composed of an adhesive resin having a thickness of 5 μm, and a layer composed of a linear low-density polyethylene resin E having a thickness of 17.5 μm. It had a five-layer structure having a total thickness of 60 μm.

Low-density polyethylene (Novatec LC600A, density 0.918 g / cm ³ ) manufactured by Nippon Polyethylene Co., Ltd. is melt-extruded onto a non-deposited film provided on the base material to form a melt-extruded polyethylene layer with a thickness of 20 μm, and this melt-extruded. The layer side of the gas barrier layer made of the linear low-density polyethylene resin E was laminated via the polyethylene layer.

As a second sealant layer
Linear low-density polyethylene resin D (Dow Chemical, Dowlex2098P, density 0.926 g / cm ³ ) and
High-density polyethylene resin (Prime Polymer Co., Ltd., Hi-Zex 3300F, density 0.950 g / cm ³ ) and
Linear low-density polyethylene resin D (Dow Chemical, Dowlex2098P, density 0.926 g / cm ³ ) and
Was coextruded by an inflation method to obtain a second sealant layer having a thickness of 100 μm.
In the second sealant layer thus obtained, the thickness of the layer made of the linear low-density polyethylene resin D is 20 μm, the thickness of the layer made of the high-density polyethylene resin is 60 μm, and the straight chain. The thickness of the layer composed of the low-density polyethylene resin D was 20 μm.

^{A low-density polyethylene resin (Novatec LC600A, density 0.918 g / cm 3} ) manufactured by Nippon Polyethylene Co., Ltd. is melt-extruded onto a layer composed of the other linear low-density polyethylene resin E provided in the gas barrier layer, and has a thickness of 20 μm. The melt-extruded polyethylene layer of the above is formed, and the second sealant layer is bonded to the layer side composed of the linear low-density polyethylene resin D through the melt-extruded polyethylene layer to obtain the laminate of the present invention. rice field.
The content of polyethylene in this laminate was 90% by mass.

Examples 2-2-2-5
A laminate was produced in the same manner as in Example 2-1 except that the configurations of the first and third polyethylene resin layers were changed as shown in Table 2.

Example 3-1
The polyethylene resin B was extruded into a single-layer film by an inflation molding method to obtain a film composed of a first polyethylene resin layer (125 μm).
This film was stretched 5 times in the longitudinal direction (MD) to obtain a stretched base material having a thickness of 25 μm.

An Al-deposited film having a thickness of 30 nm was formed on the surface of the first polyethylene resin layer of the stretched base material produced as described above by the PVD method to obtain a vapor-deposited base material. The optical density (OD value) of the formed vapor-film film was measured and found to be 3.0.

As the first sealant layer
Linear low-density polyethylene resin D (Dow Chemical, Dowlex2098P, density 0.926 g / cm ³ ) and
High-density polyethylene resin (Prime Polymer Co., Ltd. Hi-Zex 3300F, density 0.950 g / cm ³ ) and
Linear low-density polyethylene resin D (Dow Chemical, Dowlex2098P, density 0.926 g / cm ³ ) and
Was coextruded by an inflation method to obtain a first sealant layer having a thickness of 100 μm.
In the first sealant layer thus obtained, the thickness of the layer made of the linear low-density polyethylene resin D is 20 μm, the thickness of the layer made of the high-density polyethylene resin is 60 μm, and the straight chain. The thickness of the layer composed of the low-density polyethylene resin D was 20 μm.

A urethane adhesive (RU004 / H1 manufactured by Rock Paint Co., Ltd.) is applied to the vapor-deposited surface of the base material and dried to form an adhesive layer having a thickness of 3 μm, and the first sealant is formed through the adhesive layer. The layer side composed of the linear low-density polyethylene resin D of the layer was bonded.

Linear low-density polyethylene resin E (manufactured by Dow Chemical, Dowlex 2045G, density 0.920 g / cm ³ ) and
Adhesive resin (manufactured by Mitsui Chemicals, Admer NF557, density 0.903 g / cm ³ ) and
Ethylene-vinyl alcohol copolymer (manufactured by Kuraray, EVAL H171B, density 1.17 g / cm ³ , ethylene content 38 mol%) and
Adhesive resin (manufactured by Mitsui Chemicals, Admer NF557, density 0.903 g / cm ³ ) and
Linear low-density polyethylene resin E (manufactured by Dow Chemical, Dowlex 2045G, density 0.920 g / cm ³ ) and
Was co-extruded into 5 layers by the inflation method to obtain a gas barrier layer.
The gas barrier layer obtained as described above includes a layer composed of a linear low-density polyethylene resin E having a thickness of 17.5 μm, a layer composed of an adhesive resin having a thickness of 5 μm, and a thickness of 15 μm. A layer composed of an ethylene-vinyl alcohol copolymer, a layer composed of an adhesive resin having a thickness of 5 μm, and a layer composed of a linear low-density polyethylene resin E having a thickness of 17.5 μm. It had a five-layer structure having a total thickness of 60 μm.

Low-density polyethylene (Novatec LC600A, density 0.918 g / cm ³ ) manufactured by Nippon Polyethylene Co., Ltd. is melt-extruded onto a non-deposited film provided on the base material to form a melt-extruded polyethylene layer with a thickness of 20 μm, and this melt-extruded. The layer side of the gas barrier layer made of the linear low-density polyethylene resin E was laminated via the polyethylene layer.

As a second sealant layer
Linear low-density polyethylene resin D (Dow Chemical, Dowlex2098P, density 0.926 g / cm ³ ) and
High-density polyethylene resin (Prime Polymer Co., Ltd., Hi-Zex 3300F, density 0.950 g / cm ³ ) and
Linear low-density polyethylene resin D (Dow Chemical, Dowlex2098P, density 0.926 g / cm ³ ) and
Was coextruded by an inflation method to obtain a second sealant layer having a thickness of 100 μm.
In the second sealant layer thus obtained, the thickness of the layer made of the linear low-density polyethylene resin D is 20 μm, the thickness of the layer made of the high-density polyethylene resin is 60 μm, and the straight chain. The thickness of the layer composed of the low-density polyethylene resin D was 20 μm.

^{A low-density polyethylene resin (Novatec LC600A, density 0.918 g / cm 3} ) manufactured by Nippon Polyethylene Co., Ltd. is melt-extruded onto a layer composed of the other linear low-density polyethylene resin E provided in the gas barrier layer, and has a thickness of 20 μm. The melt-extruded polyethylene layer of the above is formed, and the second sealant layer is bonded to the layer side composed of the linear low-density polyethylene resin D through the melt-extruded polyethylene layer to obtain the laminate of the present invention. rice field.
The content of polyethylene in this laminate was 90% by mass.

Examples 3-2-3-5
A laminate was produced in the same manner as in Example 3-1 except that the structure of the first polyethylene resin layer was changed as shown in Table 3.

Example 4-1
Polyethylene resin B is co-extruded into 5 layers by an inflation molding method, and is composed of a 1st polyethylene resin layer (10 μm), a 2nd to 4th polyethylene resin layers (46.5 μm), and a 5th polyethylene resin layer (6 μm). Co-extruded into a 5-layer tube
Next, the fifth polyethylene resin layers, which are the inner layers, were pressure-bonded to each other with a rubber roll to obtain a block film. The block film includes a first polyethylene resin layer (10 μm), a second to fourth polyethylene resin layer (46.5 μm), a fifth polyethylene resin layer (12 μm), a second to fourth polyethylene resin layer (46.5 μm), and a first. It was composed of a polyethylene resin layer (10 μm).

This block film was stretched in the longitudinal direction (MD) at a stretching ratio of 5 times to obtain a stretched base film having a thickness of 25 μm. The thickness after stretching was 2 μm for the first polyethylene resin layer, 9.3 μm for the second to fourth polyethylene resin layers, 2.4 μm for the fifth polyethylene resin layer, 9.3 μm for the second to fourth polyethylene resin layers, and 2 μm for the first polyethylene resin layer. Met.
Met.

An Al-deposited film having a thickness of 30 nm was formed on the surface of the first polyethylene resin layer of the stretched base material produced as described above by the PVD method to obtain a vapor-deposited base material. The optical density (OD value) of the formed vapor-film film was measured and found to be 3.0.

As the first sealant layer
Linear low-density polyethylene resin D (Dow Chemical, Dowlex2098P, density 0.926 g / cm ³ ) and
High-density polyethylene resin (Prime Polymer Co., Ltd. Hi-Zex 3300F, density 0.950 g / cm ³ ) and
Linear low-density polyethylene resin D (Dow Chemical, Dowlex2098P, density 0.926 g / cm ³ ) and
Was coextruded by an inflation method to obtain a first sealant layer having a thickness of 100 μm.
In the first sealant layer thus obtained, the thickness of the layer made of the linear low-density polyethylene resin D is 20 μm, the thickness of the layer made of the high-density polyethylene resin is 60 μm, and the straight chain. The thickness of the layer composed of the low-density polyethylene resin D was 20 μm.

A urethane adhesive (RU004 / H1 manufactured by Rock Paint Co., Ltd.) is applied to the vapor-deposited surface of the base material and dried to form an adhesive layer having a thickness of 3 μm, and the first sealant is formed through the adhesive layer. The layer side composed of the linear low-density polyethylene resin D of the layer was bonded.

Linear low-density polyethylene resin E (manufactured by Dow Chemical, Dowlex 2045G, density 0.920 g / cm ³ ) and
Adhesive resin (manufactured by Mitsui Chemicals, Admer NF557, density 0.903 g / cm ³ ) and
Ethylene-vinyl alcohol copolymer (manufactured by Kuraray, EVAL H171B, density 1.17 g / cm ³ , ethylene content 38 mol%) and
Adhesive resin (manufactured by Mitsui Chemicals, Admer NF557, density 0.903 g / cm ³ ) and
Linear low-density polyethylene resin E (manufactured by Dow Chemical, Dowlex 2045G, density 0.920 g / cm ³ ) and
Was co-extruded into 5 layers by the inflation method to obtain a gas barrier layer.
The gas barrier layer obtained as described above includes a layer composed of a linear low-density polyethylene resin E having a thickness of 17.5 μm, a layer composed of an adhesive resin having a thickness of 5 μm, and a thickness of 15 μm. A layer composed of an ethylene-vinyl alcohol copolymer, a layer composed of an adhesive resin having a thickness of 5 μm, and a layer composed of a linear low-density polyethylene resin E having a thickness of 17.5 μm. It had a five-layer structure having a total thickness of 60 μm.

Low-density polyethylene (Novatec LC600A, density 0.918 g / cm ³ ) manufactured by Nippon Polyethylene Co., Ltd. is melt-extruded onto a non-deposited film provided on the base material to form a melt-extruded polyethylene layer with a thickness of 20 μm, and this melt-extruded. The layer side of the gas barrier layer made of the linear low-density polyethylene resin E was laminated via the polyethylene layer.

As a second sealant layer
Linear low-density polyethylene resin D (Dow Chemical, Dowlex2098P, density 0.926 g / cm ³ ) and
High-density polyethylene resin (Prime Polymer Co., Ltd., Hi-Zex 3300F, density 0.950 g / cm ³ ) and
Linear low-density polyethylene resin D (Dow Chemical, Dowlex2098P, density 0.926 g / cm ³ ) and
Was coextruded by an inflation method to obtain a second sealant layer having a thickness of 100 μm.
In the second sealant layer thus obtained, the thickness of the layer made of the linear low-density polyethylene resin D is 20 μm, the thickness of the layer made of the high-density polyethylene resin is 60 μm, and the straight chain. The thickness of the layer composed of the low-density polyethylene resin D was 20 μm.

^{A low-density polyethylene resin (Novatec LC600A, density 0.918 g / cm 3} ) manufactured by Nippon Polyethylene Co., Ltd. is melt-extruded onto a layer composed of the other linear low-density polyethylene resin E provided in the gas barrier layer, and has a thickness of 20 μm. The melt-extruded polyethylene layer of the above is formed, and the second sealant layer is bonded to the layer side composed of the linear low-density polyethylene resin D through the melt-extruded polyethylene layer to obtain the laminate of the present invention. rice field.
The content of polyethylene in this laminate was 90% by mass.

Examples 4-2-4-5
A laminate was produced in the same manner as in Example 4-1 except that the structure of the first polyethylene resin layer was changed as shown in Table 4.

Example 5-1
Linear low-density polyethylene (Dow Chemical, Dowlex 2045G, density 0.920 g / cm ³ ) and compatibilizer (Dow Chemical, maleic anhydride-modified polyethylene, retain 3000, density 0.870 g / cm ³ ). , Linear low-density polyethylene: compatibilizer = 93% by mass: 7% by mass was blended to prepare a blended resin.

With the blended resin prepared above,
Adhesive resin (manufactured by Mitsui Chemicals, Admer NF557, density 0.903 g / cm ³ ) and
Ethylene-vinyl alcohol copolymer (manufactured by Kuraray, EVAL H171B, density 1.17 g / cm ³ , ethylene content 38 mol%) and
Adhesive resin (manufactured by Mitsui Chemicals, Admer NF557, density 0.903 g / cm ³ ) and
With blended resin
Was co-extruded into 5 layers by the inflation method to obtain a gas barrier layer.

The gas barrier layer obtained as described above includes a layer composed of a blended resin having a thickness of 17.5 μm, a layer composed of an adhesive resin having a thickness of 5 μm, and an ethylene-vinyl alcohol having a thickness of 15 μm. Those having a five-layer structure having a total thickness of 60 μm, comprising a layer composed of a polymer, a layer composed of an adhesive resin having a thickness of 5 μm, and a layer composed of a blend resin having a thickness of 17.5 μm. Met.

The laminate of the present invention was prepared in the same manner as in Example 1-1 except that the gas barrier layer was changed to the one prepared as described above. The content of polyethylene in this laminate was 90% by mass.

Example 5-2
The laminate of the present invention was prepared in the same manner as in Example 1-2 except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 5-3
The laminate of the present invention was prepared in the same manner as in Example 1-3 except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 5-4
The laminate of the present invention was prepared in the same manner as in Examples 1-4 except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 5-5
The laminate of the present invention was prepared in the same manner as in Example 1-5, except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 6-1
The laminate of the present invention was prepared in the same manner as in Example 2-1 except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 6-2
The laminate of the present invention was prepared in the same manner as in Example 2-2, except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 6-3
The laminate of the present invention was prepared in the same manner as in Example 2-3 except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 6-4
The laminate of the present invention was prepared in the same manner as in Example 2-4 except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 6-5
The laminate of the present invention was prepared in the same manner as in Example 2-5, except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 7-1
The laminate of the present invention was prepared in the same manner as in Example 3-1 except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 7-2
The laminate of the present invention was prepared in the same manner as in Example 3-2, except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 7-3
The laminate of the present invention was prepared in the same manner as in Example 3-3, except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 7-4
The laminate of the present invention was prepared in the same manner as in Example 3-4, except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 7-5
The laminate of the present invention was prepared in the same manner as in Example 3-5, except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 8-1
The laminate of the present invention was prepared in the same manner as in Example 4-1 except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 8-2
The laminate of the present invention was prepared in the same manner as in Example 4-2 except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 8-3
The laminate of the present invention was prepared in the same manner as in Example 4-3, except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 8-4
The laminate of the present invention was prepared in the same manner as in Example 4-4, except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Example 8-5
The laminate of the present invention was prepared in the same manner as in Example 4-5, except that the gas barrier layer was changed to that prepared in Example 5-1. The content of polyethylene in this laminate was 90% by mass.

Comparative Example 1
A laminate was prepared in the same manner as in Example 1-1 except that the base material was biaxially stretched polyethylene terephthalate (manufactured by Toyobo Co., Ltd., ester film E5100) having a thickness of 12 μm. The content of polyethylene in this laminate was 85% by mass.

(Making a tube container)
The laminate obtained as described above is processed into a slit having a width of 120 mm using a bobbin cutter, and both ends in the width direction are overlapped so that the overlap width is about 1.5 mm, and then overlapped. By heat-sealing the two ends together, a cylindrical original fabric with a cylinder attached was obtained. The obtained raw fabric was cut so as to have a length direction of 122 mm to prepare a tubular body portion to be the body portion of the tube container.

The tubular body is attached to a mandrel for forming a tube container, and a head consisting of a conical trapezoidal shoulder and a continuous extraction port on the cylinder is placed at one end of the tubular body at high density. A polyethylene resin (Novatec HJ360 manufactured by Nippon Polyethylene, density 0.951 g / cm ³ ) was molded by an injection molding method to prepare a tube container as shown in FIG.
The spout portion of the head of the obtained tube container body had an outer diameter of 13 mm and a height of 1.5 mm, and a screw was provided on the side surface of the spout portion. The outer diameter of the shoulder was 38 mm.

Next, the high-density polyethylene was injected into a mold for molding a cap and molded to prepare a cap to obtain a tube container of the present invention.

<< Recyclability Evaluation >>
The recyclability of the laminates obtained in the above Examples and Comparative Examples was evaluated based on the following evaluation criteria. The evaluation results are summarized in Table 5.
(Evaluation criteria)
◯: The content of the same polyolefin in the laminate was 90% by mass or more.
X: The content of the same polyolefin in the laminate was less than 90% by mass.

<< Shoulder adhesive strength >>
A test piece was obtained by cutting in a strip shape with a width of 15 mm in the hem direction from the bonded portion between the body and the shoulder.
This test piece was pulled by a tensile tester (RTC-1310A, manufactured by Orientec Co., Ltd.) at a test speed of 300 mm / min, and the peel strength when the body was peeled from the shoulder was measured. The measurement results are summarized in Table 5.

<< Side seam strength >>
It was cut into strips with a width of 15 mm in the direction perpendicular to the side seams (overlapping points) of the body, pulled by a tensile tester at a test speed of 300 mm / min, and the strength at break was measured. The measurement results are summarized in Table 5.

<< Leakage evaluation >>
A cap was spiraled into the extraction port of the tube container body, and then 120 g of commercially available toothpaste as a content was filled through the opening of the tubular body, and then the opening of the tubular body was heat-sealed. The set tightening torque when the cap was closed was 4.7 kg · cm. It was left in a room temperature environment for 2 weeks, and the contents were visually checked every day for leakage. The evaluation criteria for leakability were as follows.
(Evaluation criteria)
〇: No leakage of contents was observed even after 2 weeks. ×: Leakage of contents was observed before 2 weeks.

10: Laminate, 11: First sealant layer, 12: Vapor film, 13: Base material, 14: Gas barrier layer, 15: Second sealant layer, 16: First polyolefin resin layer, 17: Adhesive resin Layer, 18: Layer containing gas barrier resin, 19: Adhesive resin layer, 20: Second polyolefin resin layer, 30: Laminate tube, 31: Laminate tube body, 32: Head, 33: Body, 34: Shoulder, 35: Outlet, 36: Cap, 37: Screw, 38: Weld, 39: Bottom seal

Claims (14)

A laminate comprising at least a first sealant layer, a thin-film deposition film, a base material, a gas barrier layer, and a second sealant layer in this order.
The base material comprises a first polyethylene resin layer composed of at least a polyethylene resin having a density of 0.943 g / cm ^{3 or less.}
The base material has been stretched and has been stretched.
The vapor-deposited film is provided on the first polyethylene resin layer of the base material.
A laminate, wherein the first sealant layer and the second sealant layer are made of a polyethylene resin. A laminate comprising at least a first sealant layer, a thin-film deposition film, a base material, a gas barrier layer, and a second sealant layer in this order.
The base material comprises at least a first polyethylene resin layer composed of a polyethylene resin and an olefin-based elastomer resin.
The base material has been stretched and has been stretched.
The vapor-deposited film is provided on the first polyethylene resin layer of the base material.
A laminate, wherein the first sealant layer and the second sealant layer are made of a polyethylene resin. The laminate according to claim 2, wherein the olefin-based elastomer resin is an ethylene-based elastomer resin. The laminate according to claim 2 or 3, wherein the olefin-based elastomer resin is an olefin-based block copolymer. The laminate according to claim 4, wherein the olefin-based block copolymer is an ethylene / α-olefin interpolymer. The laminate according to claim 5, wherein the ethylene / α-olefin interpolymer comprises a hard block composed of polyethylene and a soft block composed of an α-olefin monomer. The laminate according to any one of claims 2 to 6, wherein the content of the olefin-based elastomer resin in the first polyethylene resin layer of the base material is 1% by mass or more and 40% by mass or less. Any of claims 1 to 7, wherein the gas barrier layer has a five-layer structure including a first polyolefin resin layer, an adhesive resin layer, a gas barrier resin-containing layer, an adhesive resin layer, and a second polyolefin resin layer. The laminate according to item 1. The laminate according to claim 8, wherein the first polyolefin resin layer and the second polyolefin resin layer of the gas barrier layer are composed of a polyethylene resin and a compatibilizer. The laminate according to any one of claims 1 to 9, further comprising a barrier coat layer between the first sealant layer and the vapor-deposited film. The laminate according to any one of claims 1 to 10, which is used for a packaging container. The laminate according to any one of claims 1 to 11, wherein the content of the polyethylene resin in the entire laminate is 90% by mass or more. A packaging container comprising the laminate according to any one of claims 1 to 12. The packaging container according to claim 13, which is a laminated tube.

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