JP6986222B2 - Laminate and packaging with it - Google Patents

Description

The present invention relates to a laminate including at least a first base material layer, a second base material layer, and a sealant layer in this order. Further, the present invention relates to a package having the laminated body.

Conventionally, as a packaging body for enclosing various contents such as foods, pharmaceuticals, and cosmetics, a blister container consisting of a container body having a recess for storing the contents and a lid made of a flexible packaging material has been known. (For example, Patent Document 1). In such a packaging body, a container body is formed by forming a recess in the packaging material by vacuum deep drawing molding, and then the recess of the container body is covered with a lid material, and the lid material and the container body are heat-bonded. , Made.

Japanese Unexamined Patent Publication No. 2008-150112

In recent years, with the growing demand for the construction of a sound material-cycle society, it is desired to break away from fossil fuels in the material field as well as energy. For example, it is desired to reduce the amount of fossil fuel used by using a raw material derived from biomass for the production of a laminate.

An object of the present invention is to provide a package and a laminate capable of effectively solving such a problem.

The present invention is a laminate including at least a first base material layer, a second base material layer, and a sealant layer in this order, and the second base material layer contains ethylene glycol derived from biomass as a diol unit. , A laminated body containing polyethylene terephthalate having terephthalic acid derived from fossil fuel as a dicarboxylic acid unit.

The laminate of the present invention further includes a barrier layer located between the first base material layer and the second base material layer, or between the second base material layer and the sealant layer, and the barrier layer is further provided. May include a vapor deposition layer.

In the laminated body according to the present invention, the vapor deposition layer may be a transparent vapor deposition film.

The laminate of the present invention may further include a printing layer located between the first base material layer and the barrier layer, or between the first base material layer and the second base material layer. ..

In the laminated body according to the present invention, a gas barrier coating film may be provided on the surface of the thin-film deposition layer.

The present invention is a package including the above-mentioned laminate.

According to the present invention, it is possible to provide a laminated body capable of reducing the environmental load.

It is a schematic sectional drawing which shows an example of the laminated body by this invention. It is a schematic sectional drawing which shows an example of the laminated body by this invention. It is a schematic front view which shows an example of the package body by this invention. It is a schematic cross-sectional view (the IV-IV line sectional view of FIG. 3) which shows an example of the package body by this invention.

<Laminated body>
The laminate according to the present invention includes at least a first base material layer, a second base material layer, and a sealant layer in this order. The laminate may further include an adhesive layer, a printing layer, another layer, and the like. When the laminate includes two or more adhesive layers and other layers, each of them may have the same composition or different compositions.

The laminated body according to the present invention will be described with reference to the drawings. Examples of schematic cross-sectional views of the laminated body according to the present invention are shown in FIGS. 1 and 2.

The laminate 10 shown in FIG. 1 includes a first base material layer 11, an adhesive layer 15, a printing layer 16, a gas barrier coating film 141 constituting the barrier layer 14, and a vapor deposition layer constituting the barrier layer 14. The 142, the second base material layer 12, the adhesive layer 17, and the sealant layer 13 are provided in this order. In the package including the laminate 10, the sealant layer 13 is located on the innermost surface.

The laminate 10 shown in FIG. 2 includes a first base material layer 11, an adhesive layer 15, a printing layer 16, a second base material layer 12, a vapor-deposited layer 142 constituting a barrier layer 14, and a barrier layer. The gas barrier coating film 141 constituting the 14, the adhesive layer 17, and the sealant layer 13 are provided in this order. In the package including the laminate 10, the sealant layer 13 is located on the innermost surface.

Hereinafter, each layer constituting the laminated body will be described.

[Base layer]
The laminate according to the present invention includes at least a first substrate layer and a second substrate layer located on the inner surface side of the laminate with respect to the first substrate layer. By providing at least two base layers, it is possible to improve the strength such as the laminating strength of the package made from the laminated body. Further, by providing at least two base material layers, as will be described later, for example, when the laminated body is used as a lid material, the surface of the film constituting the second base material layer on the first base material layer side. By performing backprint printing, the printed layer can be made visible from the sealant layer side.

[First base material layer]
(First configuration of the first base material layer)

The first base material layer according to the first configuration is a resin layer containing polyolefin such as polypropylene, for example. The first base material layer is preferably stretched, more preferably biaxially stretched.

When the first base material layer is composed of a biaxially stretched polypropylene film, the biaxially stretched polypropylene film is excellent in moisture resistance, water resistance, chemical resistance, tensile strength, bending strength, etc., and is particularly inexpensive. Therefore, there is a big advantage. The thickness of the first base material layer according to the first configuration is, for example, 10 μm or more and 40 μm or less.

(Second configuration of the first base material layer)
The first base material layer according to the second configuration is a resin layer containing polyethylene terephthalate. The first base material layer is preferably stretched, and is preferably biaxially stretched.

The polyethylene terephthalate used for the first base material layer may be derived from biomass or fossil fuel. By using polyethylene terephthalate derived from fossil fuel for the first base material layer, the adhesion to the metal vapor deposition layer can be improved. Further, the first base material layer may contain both polyethylene terephthalate derived from biomass and polyethylene terephthalate derived from fossil fuel. By using polyethylene terephthalate derived from biomass for at least a part of the first base material layer, the degree of biomass of the entire laminate can be improved.

When the first base material layer is a stretched polyethylene terephthalate film, the stretched polyethylene terephthalate film used for the first base material layer has a tensile strength of preferably 150 MPa or more and 300 MPa or less, more preferably 200 MPa or more and 300 MPa or less in the MD direction. In the TD direction, it is preferably 150 MPa or more and 300 MPa or less, more preferably 150 MPa or more and 300 MPa or less, and in the MD direction, the tensile elongation is preferably 50% or more and 250% or less, more preferably 70% or more and 200% or less. In the TD direction, it is preferably 50% or more and 250% or less, and more preferably 60% or more and 200% or less.
The above tensile strength and tensile elongation can be measured according to JIS K 7127.

The first base material layer according to the second configuration preferably has a thickness of 5 μm or more and 40 μm or less, more preferably 8 μm or more and 25 μm or less. When the thickness of the first base material layer is about the above range, molding processing is easy and it can be suitably used as a packaging material.

(Third configuration of the first base material layer)
The first base material layer according to the third configuration is a resin layer containing a polyamide such as nylon. The first base material layer is preferably stretched, and more preferably biaxially stretched.

Examples of the polyamide include nylon 6, nylon 6,6, nylon 9, nylon 11, nylon 12, nylon 6/66, nylon 66/610, nylon MXD6 and the like. By using the polyamide of the first base material layer, the strength required for the package can be improved.

When the first base material layer is a stretched nylon film, the nylon film used for the first base material layer has a tensile strength of preferably 150 MPa or more and 350 MPa or less, more preferably 200 MPa or more and 300 MPa or less in the MD direction, and TD. In the direction, it is preferably 150 MPa or more and 400 MPa or less, more preferably 200 MPa or more and 350 MPa or less, and in the MD direction, the tensile elongation is preferably 50% or more and 200% or less, more preferably 70% or more and 150% or less. In the TD direction, it is preferably 30% or more and 200% or less, and more preferably 50% or more and 150% or less.

The first base material layer according to the third configuration preferably has a thickness of 5 μm or more and 40 μm or less, more preferably 8 μm or more and 25 μm or less. When the thickness of the first base material layer is about the above range, molding processing is easy and it can be suitably used as a packaging material.

[Second base material layer]
The second base material layer contains polyethylene terephthalate derived from biomass (hereinafter, also referred to as PET). The biomass-derived PET is a PET in which ethylene glycol derived from biomass is used as a diol unit and terephthalic acid derived from fossil fuel is used as a dicarboxylic acid unit. The second base material layer may further contain PET derived from fossil fuel having ethylene glycol derived from fossil fuel as a diol unit and terephthalic acid derived from fossil fuel as a dicarboxylic acid unit. It suffices if the following biomass degree can be realized as the entire second base material layer. In the present invention, since the second base material layer contains PET derived from biomass, the amount of PET derived from fossil fuel can be reduced and the environmental load can be reduced as compared with the conventional case.

In the present invention, the "biomass degree" (carbon concentration derived from biomass) is a value obtained by measuring the content of carbon derived from biomass by measuring radioactive carbon (C14). Since carbon dioxide in the atmosphere contains C14 at a fixed ratio (105.5 pMC), the C14 content in plants that grow by taking in carbon dioxide in the atmosphere, such as corn, is also about 105.5 pMC. It is known. It is also known that fossil fuels contain almost no C14. Therefore, the proportion of carbon derived from biomass can be calculated by measuring the proportion of C14 contained in all carbon atoms in PET. In the present invention, in the case where the content of C14 in PET was P _C14, the content P _{bio Bio} carbon from biomass, can be obtained as follows.
_{P bio (%) = P C14} /105.5×100

Since PET is a polymer of ethylene glycol containing 2 carbon atoms and terephthalic acid containing 8 carbon atoms at a molar ratio of 1: 1, when only biomass-derived ethylene glycol is used, the biomass in PET is used. The carbon content _{Pbio from which it} is derived is 20%. In the present invention, the content of carbon derived from biomass as measured by radiocarbon (C14) is preferably 10% or more and 20% or less, preferably 10% or more and 19% with respect to the total carbon in PET derived from biomass. It may be as follows. When the content of biomass-derived carbon in the biomass-derived PET is 10% or more, it is suitable as a carbon offset material. Further, the content of carbon derived from biomass in PET derived from fossil fuel produced by using ethylene glycol derived from fossil fuel and dicarboxylic acid derived from fossil fuel is 0%, and the biomass degree of PET derived from fossil fuel is 0%. Is 0%.

In the present invention, the biomass degree of the second base material layer is 5% or more, preferably 10% or more, and more preferably 15% or more. When the biomass degree of the second base material layer is 5% or more, the amount of PET derived from fossil fuel can be reduced and the environmental load can be reduced as compared with the conventional case.

When the second base material layer is a stretched PET film, the PET film used for the second base material layer has a tensile strength of preferably 150 MPa or more and 300 MPa or less, more preferably 200 MPa or more and 300 MPa or less in the MD direction, and TD. In the direction, it is preferably 150 MPa or more and 300 MPa or less, more preferably 150 MPa or more and 300 MPa or less, and in the MD direction, the tensile elongation is preferably 50% or more and 250% or less, more preferably 70% or more and 200% or less. In the TD direction, it is preferably 50% or more and 250% or less, and more preferably 60% or more and 200% or less. Tensile strength and tensile elongation can be measured according to JIS K 7127.

The second base material layer preferably has a thickness of 5 μm or more and 40 μm or less, and more preferably 8 μm or more and 25 μm or less. When the thickness of the second base material layer is about the above range, molding processing is easy and it can be suitably used as a packaging material.

[Sealant layer]
The sealant layer is the innermost layer when it is used as a package. The sealant layer is a layer formed of a thermoplastic resin that can be fused to each other by heat. The sealant layer may contain a resin material derived from fossil fuel or may contain a resin material derived from biomass.

The resin material forming the sealant layer is not particularly limited as long as it is a resin that can be fused to each other by heat, and specifically, for example, low-density polyethylene (LDPE), medium-density polyethylene (MDPE), and high density polyethylene (MDPE). Density polyethylene (HDPE), linear (linear) low density polyethylene (LLDPE), ethylene-α / olefin polymer polymerized using a metallocene catalyst, random or block copolymer of ethylene / polypropylene, polypropylene, Ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA), ethylene-ethyl acrylate copolymer (EEA), ethylene-methacrylic acid copolymer (EMAA), ethylene-methyl methacrylate Polypolymers (EMMA), ionomer resins, heat sealable ethylene / vinyl alcohol resins, or polyolefins such as methylpentene resins, ethylene-propylene copolymers, methylpentene polymers, polybutene polymers, polyethylene, polypropylene or cyclic olefin copolymers. Acid-modified polyolefin resin, polyvinyl acetate resin, poly (meth) acrylic obtained by modifying based resin and polyolefin resin with unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, and itaconic acid. Examples thereof include based resins, polyvinyl chloride-based resins, and other resins. These may be used alone or as a mixture of two or more. The sealant layer can be used as a resin film or sheet as described above, a coating film thereof, or the like.

When polyethylene is used as the resin material for forming the sealant layer, polyethylene derived from biomass may be polymerized in addition to ethylene obtained from fossil fuel as the raw material. As the biomass-derived ethylene, specifically, for example, those described in JP2012-251006 can be used. By using polyethylene obtained by polymerizing biomass-derived ethylene as a material constituting the sealant layer, it can be formed into a layer made of a carbon-neutral material. The amount of fuel used can be reduced and the environmental load can be reduced.

As the biomass-derived ethylene, a commercially available polyethylene may be used. For example, a sugarcane-derived linear chain of "C4LL-LL118 (d = 0.916, MFR = 1.0 g / 10 minutes)" manufactured by Braskem Co., Ltd. A low-density polyethylene-based resin or a sugarcane-derived low-density polyethylene-based resin of "SBC118 (d = 0.918, MFR = 8.1 g / 10 minutes)" can be used.

In this embodiment, the sealant layer is a single layer, but two or more sealant layers may be provided. When having two or more sealant layers, each may have the same composition or different compositions. For example, the sealant layer is composed of three layers in which the first layer, the second layer, and the third layer are laminated in order, and the first layer and the third layer are made of a fossil fuel-derived resin material, and the second layer is used. The layer may be a resin material containing a biomass-derived resin material. When the sealant layer is composed of two or more layers, it can be laminated by using the co-extrusion method.

The thickness of the sealant layer is preferably 10 or more and 80 μm or less, and more preferably 20 or more and 50 μm or less.

[Barrier layer]
Next, the barrier layer will be described.

(Embedded layer)
The thin-film deposition layer constituting the barrier layer of the laminated body shown in FIGS. 1 and 2 is a layer made of a thin-film deposition film that can be formed by a conventionally known method. By providing the thin-film deposition layer, it is possible to impart or improve the gas barrier property of blocking the permeation of oxygen gas, water vapor and the like. The barrier layer may include two or more thin-film deposition layers. When two or more thin-film deposition layers are provided, they may have the same composition or different compositions.

The thin-film deposition film may be a transparent thin-film deposition film made of a thin-film deposition film of an inorganic oxide. As described above, when the thin-film vapor-deposited film is a transparent thin-film film, it is possible to impart or improve the gas barrier property of blocking the permeation of oxygen gas, water vapor and the like while maintaining the permeability of the contents.

Examples of the transparent vapor-deposited film include silicon (Si), aluminum (Al), magnesium (Mg), calcium (Ca), potassium (K), tin (Sn), sodium (Na), boron (B), and titanium ( A vapor-deposited film of an oxide such as Ti), lead (Pb), zirconium (Zr), or yttrium (Y) can be used. In particular, for packaging, it is preferable to provide a vapor-deposited film of aluminum oxide or silicon oxide.

Representation of the inorganic oxide, for _example, SiO X, as such AlO _X MO _X (In the formula, M represents an inorganic element, the value of X, varies each of an inorganic element range.) In expressed. The range of the value of X is 0 to 2 for silicon (Si), 0 to 1.5 for aluminum (Al), 0 to 1 for magnesium (Mg), and 0 to 1 for calcium (Ca). Potassium (K) is 0 to 0.5, tin (Sn) is 0 to 2, sodium (Na) is 0 to 0.5, boron (B) is 0 to 1.5, and titanium (Ti). Can take a value in the range of 0 to 2, lead (Pb) 0 to 2, zirconium (Zr) 0 to 2, and yttrium (Y) 0 to 1.5. In the above, when X = 0, it is a completely inorganic simple substance (pure substance) and is not transparent, and the upper limit of the range of X is a completely oxidized value. Silicon (Si) and aluminum (Al) are preferably used as the packaging material, and silicon (Si) is in the range of 1.0 to 2.0 and aluminum (Al) is in the range of 0.5 to 1.5. You can use the one with the value of.

The film thickness of the transparent thin-film film varies depending on the type of inorganic oxide used, but it is desirable to arbitrarily select and form the film, for example, within the range of 50 Å or more and 2000 Å or less, preferably 100 Å or more and 1000 Å or less. For example, in the case of a vapor-filmed film of aluminum oxide or silicon oxide, a film thickness of 50 Å or more and 500 Å or less, more preferably 100 Å or more and 300 Å or less is desirable.

The thin-film film can be formed on the base material layer or the like by using the following forming method. Examples of the method for forming the vapor deposition film include a physical vapor deposition method (PVD method) such as a vacuum vapor deposition method, a sputtering method, and an ion plating method, or a plasma chemical vapor deposition method and thermochemistry. Examples thereof include a vapor phase growth method, a chemical vapor deposition method such as a photochemical vapor deposition method, and a CVD method.

(Gas barrier coating film)
If necessary, a gas barrier coating film may be provided on the above-mentioned thin-film deposition layer. The gas barrier coating film is a coating film that functions as a layer that suppresses the permeation of oxygen gas, water vapor, and the like. The gas barrier coating film has a general formula of R ¹ _n M (OR ² ) _m (wherein, in the formula, R ¹ and R ² represent organic groups having 1 to 8 carbon atoms, M represents a metal atom, and n. Represents an integer of 0 or more, m represents an integer of 1 or more, and n + m represents the valence of M), and at least one alkoxide, a polyvinyl alcohol-based resin and / or It is obtained by a gas barrier composition containing an ethylene / vinyl alcohol copolymer and further polycondensed by a solgel method in the presence of a solgel method catalyst, an acid, water, and an organic solvent.

As the alkoxide represented by the above general formula R ¹ _n M (OR ² ) _m , at least one or more of a partial hydrolyzate of the alkoxide and a condensate of the hydrolysis of the alkoxide can be used. Further, as the partial hydrolyzate of the above alkoxide, it is not necessary that all of the alkoxy groups are hydrolyzed, and one or more of them may be hydrolyzed, or a mixture thereof. As the condensate of hydrolysis of alkoxide, one having a dimer or more of a partially hydrolyzed alkoxide, specifically, one having a dimer of 2 to 6 is used.

In the above-mentioned ^{alkoxide represented by the general formula R 1} _n M (OR ² ) _m , silicon, zirconium, titanium, aluminum, or the like can be used as the metal atom represented by M. In the present embodiment, examples of the preferred metal include silicon and titanium. Further, in the present invention, the alkoxide may be used alone or by mixing alkoxides of two or more different metal atoms in the same solution.

Further, in the alkoxide represented by the above general formula R ¹ _n M (OR ² ) _m ^{, specific examples of the organic group represented by R 1} include, for example, a methyl group, an ethyl group, an n-propyl group and i. Examples thereof include alkyl groups such as -propyl group, n-butyl group, i-butyl group, sec-butyl group, t-butyl group, n-hexyl group, n-octyl group and others. Further, in the alkoxide represented by the above general formula R ¹ _n M (OR ² ) _m ^{, specific examples of the organic group represented by R 2} include, for example, a methyl group, an ethyl group, an n-propyl group and i. -Propyl group, n-butyl group, sec-butyl group, etc. can be mentioned. In addition, these alkyl groups may be the same or different in the same molecule.

When preparing the above gas barrier composition, for example, a silane coupling agent or the like may be added. As the above-mentioned silane coupling agent, known organic reactive group-containing organoalkoxysilanes can be used. In this embodiment, organoalkoxysilane having an epoxy group is particularly preferably used, and specifically, for example, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, β. -(3,4-Epylcyclohexyl) ethyltrimethoxysilane or the like can be used. The above-mentioned silane coupling agent may be used alone or in combination of two or more.

[Print layer]
The printing layer is used for decoration, display of contents, display of expiration date, display of manufacturers, sellers, etc., and for the purpose of giving aesthetic impression, such as letters, numbers, patterns, figures, symbols, patterns, etc. A layer that forms any desired print pattern. The printing layer can be provided as needed, and can be provided, for example, between the first base material layer and the barrier layer, or between the first base material layer and the second base material layer. The printing layer may be provided on the entire surface of the barrier layer or the second base material layer, or may be provided on a part thereof. The printed layer can be formed by using a conventionally known pigment or dye, and the forming method thereof is not particularly limited.

The printed layer preferably has a thickness of 0.1 μm or more and 10 μm or less, more preferably 1 μm or more and 5 μm or less, and further preferably 1 μm or more and 3 μm or less.

[Adhesive layer]
The adhesive layer is a layer provided when adhering any two layers, and is, for example, between the first base material layer and the second base material layer or the barrier layer, or with the second base material layer or the barrier layer. It can be provided between the sealant layer.

The adhesive layer can be formed by a conventionally known method, for example, a dry laminating method. When the two layers are bonded by the dry laminating method, the adhesive layer is formed by applying an adhesive to the surface of the layer on the side to be laminated and drying. The adhesive to be applied includes, for example, one-component or two-component curable or non-curable vinyl-based, (meth) acrylic-based, polyamide-based, polyester-based, polyether-based, polyurethane-based, epoxy-based, and rubber. Adhesives such as solvent type, water type, or emulsion type such as system and others can be used. As the two-component curable adhesive, a cured product of a polyol and an isocyanate compound can be used. As a coating method of the above-mentioned adhesive for laminating, for example, a direct gravure roll coating method, a gravure roll coating method, a kiss coating method, a reverse roll coating method, a fonten method, a transfer roll coating method, or other methods can be applied. ..

<Manufacturing method of laminated body>
The method for producing the laminate according to the present invention is not particularly limited, and the laminate can be produced by using a conventionally known method such as a dry laminate method.

The laminate according to the present invention is provided with a chemical function, an electrical function, a magnetic function, a mechanical function, a friction / wear / lubrication function, an optical function, a thermal function, a surface function such as biocompatibility, and the like. It is also possible to perform secondary processing for the purpose. Examples of secondary processing include embossing, painting, adhesion, printing, metallizing (plating, etc.), machining, surface treatment (antistatic treatment, corona discharge treatment, plasma treatment, photochromism treatment, physical vapor deposition, chemical vapor deposition, etc.) Coating, etc.) and the like. Further, the laminated body according to the present invention may be subjected to laminating processing (dry laminating or extruded laminating), bag making processing, and other post-treatment processing to produce a molded product.

<Packaging>
The package according to the present invention can be suitably used, for example, when accommodating foods and the like. Such a package may be, for example, a deeply drawn package (blister container) using the laminated body as a lid material. Further, for example, the above-mentioned laminated body is used and folded in two or three, or two pieces of the laminated body are prepared, and the surface of the sealant layer of the front side laminated body and the sealant layer of the back side laminated body are prepared. The surfaces are overlapped with each other facing each other, and the peripheral ends thereof are, for example, a side seal type, a two-way seal type, a three-way seal type, a four-way seal type, an envelope sticker type, and a gassho sticker type (pillow seal type). Various types of packaging bags can be manufactured by heat-sealing with heat-sealing forms such as a pleated seal type, a flat-bottomed seal type, and a square-bottomed seal type. Further, it is also possible to manufacture a gusset type packaging bag by performing heat sealing with the laminated body in a folded state inserted between the laminated body on the front side and the laminated body on the back side. It should be noted that all of the laminates constituting the packaging bag do not have to be the laminates according to the present invention. That is, at least a part of the laminate constituting the packaging bag may be a laminate having a second base material layer containing PET derived from biomass, and the other portion of the laminate constituting the packaging bag is derived from fossil fuel. It may be a laminate including a first base material layer made of PET.

In the above, as the heat sealing method, for example, a known method such as a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, and an ultrasonic seal can be used.

The package according to the present invention will be described with reference to the drawings. FIG. 3 shows an example of a schematic front view of a package according to the present invention (form of a deeply drawn package), and FIG. 4 shows an example of a schematic cross-sectional view of the package according to the present invention.

As shown in FIGS. 3 and 4, the package 30 includes a container body 31 constituting the front surface 31a and a lid member 32 constituting the back surface 32a. Of these, the container body 31 is formed with a substantially circular recess 33 for accommodating the contents by deep drawing. Further, the lid material 32 is made of the above-mentioned laminated body and has substantially the same planar shape as the container body 31.

Further, the package 30 is formed with a sealing portion 34 in which the container body 31 and the sealant layer of the laminated body constituting the lid material 32 are joined by heat adhesion or the like. The sealing portion 34 is formed in almost the entire area of the container body 31 other than the recess 33, and seals the contents contained in the recess 33 so as to have an easy peel (easy-opening) property. ing. In FIG. 3, the seal portion 34 is shaded.

By the way, in the package 30 according to the present invention, for example, as shown by the arrow in FIG. 4, the consumer may visually recognize the pattern or the like provided on the lid material 32 from the surface 31a side of the package 30. That is, the printed layer of the above-mentioned laminated body constituting the lid material 32 may be visually recognized from the sealant layer side. As described above, even when the printed layer is visually recognized from the sealant layer side, the above-mentioned laminate constituting the lid material 32 of the package 30 according to the present invention is the first base material layer and the second base material layer. By performing backprint printing on the surface of the film constituting the second base material layer on the side of the first base material layer, the printed layer can be made visible from the sealant layer side. Therefore, the above-mentioned laminate can be produced without changing the printing method such as back printing or front printing, so that the productivity can be improved.

Next, the present invention will be specifically described with reference to Examples, but the present invention is not limited to the description of the following Examples as long as the gist of the present invention is not exceeded.

[Example]
(Cover material)
As the first base material layer, a biaxially stretched polypropylene film (Toyobo, P2161, thickness 30 μm) was prepared.

In addition, a biaxially stretched PET film derived from biomass (biomass degree: 13%, thickness) formed by using terephthalic acid derived from fossil fuel and ethylene glycol derived from biomass (biomass polyester) as the second base material layer. 12 μm) was prepared. Subsequently, a 120 Å thick aluminum oxide vapor-deposited layer was formed on the surface of the biomass-derived PET film located on the outer surface side when the package was formed. Subsequently, a gas barrier coating film having a thickness of 0.3 μm was formed on the vapor-filmed layer in a dry state. Subsequently, back printing was performed on the gas barrier coating film by gravure printing to form a printing layer. In this way, a biomass-derived PET film in which the vapor-film deposition layer, the gas barrier coating film, and the printing layer were formed on the outer surface side in this order was obtained.

Further, as a sealant layer, a non-stretched linear low-density polyethylene film (manufactured by Mitsui Chemicals Tohcello Corporation, TUX® MCS, thickness 30 μm) was prepared.

Subsequently, a biaxially stretched polypropylene film, a biomass-derived PET film, and a non-stretched linear low-density polyethylene film were laminated in this order by a dry laminating method to prepare a laminate 10 shown in FIG. The layer structure of the laminated body 10 is expressed as follows.
OPP / DL / Mark / Coating film / Vapor deposition layer / Bio-PET / DL / LL
"/" Represents the boundary between layers. The leftmost layer is a layer constituting the outer surface of the laminated body, and the rightmost layer is a layer constituting the inner surface of the laminated body.
"OPP" means a biaxially stretched polypropylene film. "DL" means an adhesive layer containing an adhesive. "Mark" means a print layer. "Bio PET" means a PET film derived from biomass. "LL" means a non-stretched linear low density polyethylene film.

The adhesive layer between the biaxially stretched polypropylene film and the biomass-derived PET film is a two-component curable adhesive (manufactured by Rock Paint Co., Ltd., main agent: RU-40, curing agent: H-4). include. The adhesive layer between the biomass-derived PET film and the non-stretched linear low-density polyethylene film is a two-component curable adhesive (manufactured by Rock Paint Co., Ltd., main agent: RU-40, curing agent: H-4. )including.

(Container body)
An unstretched nylon film (CN) having a thickness of 40 μm and a corona-treated surface of an unstretched polypropylene film having a thickness of 50 μm treated with a single-sided corona were laminated by a dry lamination method via a polyester polyol-isocyanate adhesive, and the temperature was 40 ° C. After curing for 2 days, a container material to be used for the container body was prepared.

Then, the above-mentioned container material was subjected to vacuum deep drawing molding to form a recess having a depth of 15 mm and a diameter of 100 mm. In this way, a container body having a recess was produced. Then, the lid material and the container body were heat-bonded to prepare the package shown in FIGS. 3 and 4.

[Comparison example]
A biaxially stretched fossil fuel-derived PET film (biomass degree: 0%,) formed by using terephthalic acid derived from fossil fuel and ethylene glycol derived from fossil fuel as the second base material layer used for the lid material. A laminate was produced in the same manner as in the examples except that Toyo Boseki Co., Ltd., E5100, thickness 12 μm) was used. The layer structure of the laminated body is expressed as follows.
OPP / DL / Mark / Coating film / Vapor deposition layer / Fossil PET / DL / LL
"Fossil PET" means a PET film derived from fossil fuel.

<Manufacturing of packaging>
Using the laminate obtained in the examples as a lid material, the lid body and the container body were heat-bonded so that the lid material covered the recesses of the container body to prepare the package 30 shown in FIGS. 3 and 4. .. Similarly, the laminate obtained in the comparative example is used as a lid material, and the lid body and the container body are heat-bonded so that the lid material covers the recess of the container body, and the package shown in FIGS. 3 and 4 is heat-bonded. 30 was made.

As a result, the packages produced from the laminated bodies obtained in Examples and Comparative Examples were all packages having good appearance, openability, and the like. Therefore, it was possible to obtain the same packaging as the fossil fuel-derived product even for the biomass-derived product that can reduce the environmental load.

10 Laminated body 11 1st base material layer 12 2nd base material layer 13 Sealant layer 14 Barrier layer 16 Printing layer 141 Gas barrier coating film 142 Deposited layer 30 Package

Claims (5)

At least a first base material layer, a second base material layer (excluding a heat-shrinkable film having a heat shrinkage rate of 5% or more and the biomass polyester resin (A) described below), and a sealant layer are provided in this order. Laminated body (however, excluding the following barrier film (B) and excluding the following laminated body (C)).
The first base material layer is a biaxially stretched polypropylene film, and is
The second base material layer contains polyethylene terephthalate having ethylene glycol derived from biomass as a diol unit and terephthalic acid derived from fossil fuel as a dicarboxylic acid unit.
The second base material layer has a barrier layer and has a barrier layer.
The barrier layer includes a thin-film deposition layer and a gas barrier coating film provided on the surface of the vapor-film deposition layer.
The gas barrier coating film contains an alkoxide and a polyvinyl alcohol-based resin and / or an ethylene / vinyl alcohol copolymer.
The sealant layer is linear low density polyethylene and is
The thickness of the sealant layer is 20 μm or more and 50 μm or less.
(A) A biomass polyester resin containing a biomass-derived ethylene glycol as a diol unit, a fossil fuel-derived dicarboxylic acid as a dicarboxylic acid unit, and the dicarboxylic acid containing terephthalic acid and isophthalic acid. A barrier film comprising a vapor-deposited layer provided on at least one of the substrate layers and a gas-barrier coating film provided on a surface of the vapor-deposited layer opposite to the substrate layer side.
The base material layer is made of a resin composition containing polyester as a main component, which is composed of a diol unit and a dicarboxylic acid unit.
The diol unit contains ethylene glycol derived from biomass, and the diol unit contains ethylene glycol.
The dicarboxylic acid unit consists of a fossil fuel-derived dicarboxylic acid.
A barrier film (C) having at least two layers, wherein the thin-film deposition layer is made of aluminum oxide by a physical vapor deposition method and the thickness of the vapor-film deposition layer is 30 to 100 Å.
The first layer comprises a resin composition containing a polyester consisting of a diol unit and a dicarboxylic acid unit as a main component, and the resin composition has an ethylene glycol having a diol unit derived from biomass and a dicarboxylic acid unit. Polyester, which is a dicarboxylic acid derived from fossil fuel, is contained in an amount of 50 to 95% by mass based on the entire resin composition.
The second layer is a laminate made of a resin material containing a raw material derived from biomass. The laminate according to claim 1 , wherein the vapor-deposited layer is a transparent thin-film film. The laminate according to claim 1 or 2 , further comprising a printing layer located between the first base material layer and the barrier layer, or between the first base material layer and the second base material layer. .. A package body comprising the laminate according to any one of claims 1 to 3. A package having the laminate according to claim 1, wherein the package is provided.
A lid material made of the laminated body and a container body having a recess are included.
A package body in which a seal portion is formed in which the container body and the sealant layer of the laminate constituting the lid material are joined.

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