JP7172052B2 - Packaging materials and packaging products - Google Patents

Description

The present invention relates to packaging materials containing biomass-derived components and packaged products comprising the packaging materials.

BACKGROUND ART Conventionally, various packaging materials have been developed and proposed as packaging materials for constituting packaging products for filling and packaging various articles such as food and drink, pharmaceuticals, chemicals, cosmetics, sanitary goods, daily necessities, and the like. The packaging material is composed of a laminate obtained by laminating at least a substrate layer containing a stretched plastic or the like and a sealant layer for welding the packaging materials together. Usually, the laminate further includes a printing layer for forming a printed pattern and an adhesive layer for bonding each layer of the laminate.

In recent years, along with the increasing demand for building a recycling-oriented society, the use of biomass has attracted attention in the field of laminates that make up packaging materials, as well as in the field of energy. there is Biomass is an organic compound that is photosynthesised from carbon dioxide and water, and is a so-called carbon-neutral renewable energy that is regenerated into carbon dioxide and water by using it. In recent years, biomass plastics using biomass as raw materials have been rapidly put to practical use, and attempts have been made to produce various resins from biomass raw materials.

As a biomass-derived resin, polylactic acid (PLA), which is produced through lactic acid fermentation, began commercial production first, but its performance as a plastic, including its biodegradability, has fallen behind that of today's general-purpose plastics. Since it is very different from the standard, it has not been widely used due to limitations in product applications and product manufacturing methods. In addition, PLA is subjected to Life Cycle Assessment (LCA) evaluation, and discussions are being made on energy consumption during PLA production and equivalence when replacing general-purpose plastics.

Here, as general-purpose plastics, various types such as polyethylene, polypropylene, polyvinyl chloride, polystyrene, and polyester are used. In particular, polyethylene is molded into films, sheets, bottles, etc., and is used in various applications such as packaging materials, and is widely used around the world. Therefore, the use of conventional fossil fuel-derived polyethylene imposes a large environmental load. Therefore, it is desired to reduce the consumption of fossil fuels by using biomass-derived raw materials for the production of polyethylene. For example, until now, research has been conducted to produce ethylene and butylene, which are raw materials for polyolefin resin, from renewable natural raw materials (see Patent Document 1).

In addition, polyesters are widely used in various industrial applications because they are excellent in mechanical properties, chemical stability, heat resistance, transparency, etc., and are inexpensive. Polyester is obtained by polycondensation of diol units and dicarboxylic acid units. For example, polyethylene terephthalate (hereinafter sometimes abbreviated as PET) is obtained by esterifying ethylene glycol and terephthalic acid as raw materials. It is produced by a polycondensation reaction after These raw materials are produced from petroleum, which is a fossil resource. For example, ethylene glycol is industrially produced from ethylene, and terephthalic acid is industrially produced from xylene.

Attempts have recently been made to produce polyester from biomass raw materials. For example, ethylene glycol, which is a monomer component, has been put into practical use using biomass-derived ethylene glycol. It has been proposed to apply polyester resins containing such biomass-derived raw materials to packaging materials (see Patent Document 2).

Japanese Patent Publication No. 2011-506628 JP 2012-96410 A

In conventional packaging materials, the printed layer of the laminate is formed of a fossil fuel-derived material, which has been a cause of lowering the biomass content of the entire packaging material. Therefore, in a packaging material composed of a laminate including a substrate layer, a printed layer, an adhesive layer, and a sealant layer, it is desired to further increase the biomass content of the entire packaging material.

The present invention has been made in consideration of such points, and an object of the present invention is to provide a packaging material having an increased degree of biomass.

The present invention provides a packaging material comprising at least a substrate layer, a printed layer, an adhesive layer, an intermediate layer and a sealant layer, wherein the adhesive layer is in contact with the intermediate layer, and the printed layer comprises a colored and a cured product of a polyol and an isocyanate compound, wherein at least one of the polyol and the isocyanate compound contains a biomass-derived component.

In the packaging material according to the present invention, the polyol of the printed layer may be a polyester polyol which is a reactant of a polyfunctional alcohol and a polyfunctional carboxylic acid.

In the packaging material according to the present invention, at least one of the polyfunctional alcohol and the polyfunctional carboxylic acid of the printed layer may contain a biomass-derived component.

In the packaging material according to the present invention, the polyol of the printed layer may be a polyether polyol which is a reactant of a polyfunctional alcohol and a polyfunctional isocyanate.

In the packaging material according to the present invention, at least one of the polyfunctional alcohol and the polyfunctional isocyanate of the printed layer may contain a biomass-derived component.

In the packaging material according to the present invention, the isocyanate compound of the printed layer may contain a biomass-derived component.

In the packaging material according to the invention, the substrate layer may have a first substrate film comprising polyester, polyamide or polyolefin.

In the packaging material according to the present invention, the first base film may contain a biomass polyester having a biomass-derived ethylene glycol as a diol unit and a fossil fuel-derived dicarboxylic acid as a dicarboxylic acid unit.

In the packaging material according to the present invention, the intermediate layer may have at least one of a second base film containing polyester or polyamide as a main component, or a metal foil.

In the packaging material according to the present invention, the base layer has the second base film, and the second base film includes biomass-derived ethylene glycol as a diol unit and fossil fuel-derived dicarboxylic acid as a dicarboxylic acid. It may contain biomass polyester as a unit.

In the packaging material according to the present invention, the sealant layer may contain polyolefin, which is a polymer of olefin-containing monomers.

In the packaging material according to the present invention, the sealant layer may contain biomass polyolefin, which is a polymer of biomass-derived ethylene-containing monomers.

The present invention is a packaged product comprising a packaging material as described above.

According to the present invention, the biomass content of the packaging material can be increased.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic cross section which shows an example of the packaging material by this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic cross section which shows an example of the packaging material by this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic cross section which shows an example of the packaging material by this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic cross section which shows an example of the packaging material by this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic cross section which shows an example of the packaging material by this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic cross section which shows an example of the packaging material by this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic cross section which shows an example of the packaging material by this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic cross section which shows an example of the packaging material by this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic cross section which shows an example of the packaging material by this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic cross section which shows an example of the packaging material by this invention. It is a model front view which shows an example of the packaging product by this invention. It is a model front view which shows an example of the packaging product by this invention. It is a model front view which shows an example of the packaging product by this invention. It is a model front view which shows an example of the packaging product by this invention. It is a model front view which shows an example of the packaging product by this invention. It is a model front view which shows an example of the packaging product by this invention. FIG. 2 shows the layer structure of the packaging materials of Examples 1A-1O. FIG. 2 shows the layer structure of packaging materials of Examples 1A and 2 to 20. FIG. FIG. 4 shows the layer structure of the packaging materials of Examples 21A-21E. FIG. 10 is a diagram showing the layer structure of packaging materials of Examples 21A and 22-29.

<Packaging material>
A laminate constituting a packaging material according to the present invention includes at least a substrate layer, a printed layer, an adhesive layer, an intermediate layer and a sealant layer. The adhesive layer is in contact with or included in the intermediate layer. For example, the first adhesive layer, which will be described later, is in contact with the intermediate layer from the substrate layer side. A second adhesive layer, which will be described later, is in contact with the intermediate layer from the sealant layer side. An intermediate adhesive layer, which will be described later, is included in the intermediate layer. In the present invention, by forming at least the printed layer from a material containing a biomass-derived component, it is possible to reduce the amount of fossil fuels used and reduce the environmental load compared to conventional methods. In the present application, "in contact with the intermediate layer" is a concept including the case where a layer other than the base film and the metal foil, such as a printed layer, is present between the intermediate layer and the adhesive layer.

In the present invention, the biomass degree described below in the entire laminate constituting the packaging material is preferably 3% or more, more preferably 5% or more and 60% or less, and still more preferably 10% or more and 60% or less. . If the degree of biomass is within the above range, the amount of fossil fuel used can be reduced, and the environmental load can be reduced.

The laminate constituting the packaging material preferably has a thickness of 10 μm or more and 500 μm or less, more preferably 20 μm or more and 300 μm or less, still more preferably 30 μm or more and 200 μm or less.

In addition to the above layers, the packaging material according to the present invention may further have at least one barrier layer such as a metal foil, vapor deposition layer, gas barrier coating film 62, or other layer such as a resin layer. When two or more other layers are provided, they may have the same composition or may have different compositions.

A laminate constituting the packaging material according to the present invention will be described with reference to the drawings. Examples of schematic cross-sectional views of packaging material 10 according to the present invention are shown in FIGS. 1 to 10, reference numeral 10y represents the outer surface of the packaging material 10 and reference numeral 10x represents the inner surface of the packaging material 10. In FIGS. The inner surface 10x is a surface of a packaged product such as a bag formed from the packaging material 10, which faces the contents contained in the packaged product. Further, the outer surface 10y is a surface located on the opposite side of the inner surface 10x. In the present application, the term "order" in descriptions such as "provided in this order" and "layered in order" indicates the order in the direction from the outer surface 10y side to the inner surface 10x side unless otherwise specified.

The packaging material 10 shown in FIG. 1 includes a substrate layer 20, a printed layer 50, a first adhesive layer 26, an intermediate layer 30, a second adhesive layer 44, and a sealant layer 40 in this order. . The base layer 20 includes a first base film 22 . Intermediate layer 30 includes a second base film 32 . Sealant layer 40 includes a sealant film 42 .

The packaging material 10 shown in FIG. 2 is obtained by replacing the second base film 32 of the intermediate layer 30 of the packaging material 10 of FIG. Specifically, the packaging material 10 of FIG. Prepare in this order. The base layer 20 includes a first base film 22 . Intermediate layer 30 includes metal foil 34 . Sealant layer 40 includes a sealant film 42 .

The packaging material 10 shown in FIG. 3 includes a substrate layer 20, a printed layer 50, a first adhesive layer 26, an intermediate layer 30, a second adhesive layer 44, and a sealant layer 40 in this order. . The base layer 20 includes a first base film 22 . The intermediate layer 30 includes a second base film 32, an intermediate adhesive layer 38, and a metal foil 34 in this order. Sealant layer 40 includes a sealant film 42 . Thus, intermediate layer 30 of packaging material 10 of FIG. 3 includes two layers joined by intermediate adhesive layer 38 .

The packaging material 10 shown in FIG. 4 is obtained by changing the order of the second base film 32 and the metal foil 34 of the intermediate layer 30 of the packaging material 10 shown in FIG. Specifically, the packaging material 10 of FIG. Prepare in this order. The base layer 20 includes a first base film 22 . The intermediate layer 30 includes a metal foil 34, an intermediate adhesive layer 38, and a second base film 32 in this order. Sealant layer 40 includes a sealant film 42 .

The packaging material 10 shown in FIG. 5 is obtained by replacing the metal foil 34 of the intermediate layer 30 of the packaging material 10 of FIG. Specifically, the packaging material 10 of FIG. Prepare in this order. The base layer 20 includes a first base film 22 . The intermediate layer 30 includes a second base film 32, an intermediate adhesive layer 38, and a third base film 36 in this order. Sealant layer 40 includes a sealant film 42 .

The packaging material 10 shown in FIG. 6 has the printed layer 50 provided on the base layer 20 in the packaging material 10 of FIG. Specifically, the packaging material 10 of FIG. Prepare in this order. The base layer 20 includes a first base film 22 . Intermediate layer 30 includes a second base film 32 . Sealant layer 40 includes a sealant film 42 . Although not shown, the intermediate layer 30 may contain a metal foil 34 instead of the second base film 32 .

In the packaging material 10 shown in FIG. 7, the intermediate layer 30 includes the printed layer 50 provided in the base material layer 20 in the packaging material 10 in FIG. Specifically, the packaging material 10 of FIG. Prepare in this order. The base layer 20 includes a first base film 22 . The intermediate layer 30 includes a second base film 32, a printed layer 50, an intermediate adhesive layer 38, and a metal foil 34 in this order. Sealant layer 40 includes a sealant film 42 . Although not shown, the intermediate layer 30 may include a third base film 36 instead of the metal foil 34 .

The packaging material 10 shown in FIG. 8 is obtained by further providing a deposition layer 60 on the first base film 22 of the packaging material 10 shown in FIG. Specifically, the packaging material 10 of FIG. 30, a second adhesive layer 44 and a sealant layer 40 in this order. Intermediate layer 30 includes a second base film 32 . Sealant layer 40 includes a sealant film 42 . As shown in FIG. 8, the packaging material 10 may further include a gas barrier coating film 62 located on the vapor deposition layer 60 . Also, although not shown, the intermediate layer 30 may contain a metal foil 34 instead of the second base film 32 . The intermediate layer 30 may also comprise two layers joined by an intermediate adhesive layer 38, as in the example shown in FIGS. 3-5.

The packaging material 10 shown in FIG. 9 is obtained by further providing a deposition layer 60 on the second base film 32 of the packaging material 10 shown in FIG. Specifically, the packaging material 10 of FIG. 9 includes an intermediate layer 30 that includes a substrate layer 20, a printed layer 50, a first adhesive layer 26, a vapor deposition layer 60, and a second substrate film 32 in this order. , a second adhesive layer 44 and a sealant layer 40 in this order. The base layer 20 includes a first base film 22 . Sealant layer 40 includes a sealant film 42 . Although not shown, the packaging material 10 may further include a gas barrier coating film 62 located on the vapor deposition layer 60 . Also, although not shown, the intermediate layer 30 may comprise two layers joined by an intermediate adhesive layer 38, as in the example shown in FIGS. 3-5.

The packaging material 10 shown in FIG. 10 is obtained by further providing a deposition layer 60 on the second base film 32 of the packaging material 10 shown in FIG. Specifically, the packaging material 10 of FIG. , a second adhesive layer 44 and a sealant layer 40 in this order. The base layer 20 includes a first base film 22 . Sealant layer 40 includes a sealant film 42 . As shown in FIG. 10 , the packaging material 10 may further include a gas barrier coating film 62 located on the vapor deposition layer 60 . Also, although not shown, the intermediate layer 30 may comprise two layers joined by an intermediate adhesive layer 38, as in the example shown in FIGS. 3-5. In this case, the vapor deposition layer 60 and the gas barrier coating film 62 may be positioned between two layers of the intermediate layer 30 joined by the intermediate adhesive layer 38 .

It should be noted that it is also possible to appropriately combine a plurality of layer configurations of the packaging material 10 shown in FIGS. 1 to 10 described above.

Each layer constituting the packaging material 10 will be described below.

(First base film)
The first base film 22 of the base layer 20 is a plastic film. The first base film 22 may contain a biomass-derived component or may not contain a biomass-derived component.

When the first base film 22 contains a biomass-derived component, the first base film 22 can be formed using the following biomass polyester or biomass polyethylene.

The biomass polyester has biomass-derived ethylene glycol as a diol unit and fossil fuel-derived dicarboxylic acid as a dicarboxylic acid unit. In addition to the biomass polyester, the base material layer may further contain a fossil fuel-derived polyester having a fossil fuel-derived ethylene glycol as a diol unit and a fossil fuel-derived dicarboxylic acid as a dicarboxylic acid unit. It suffices if the base material layer as a whole can achieve the following biomass degree. In the present invention, since the substrate layer contains biomass polyester, the amount of fossil fuel-derived polyester can be reduced compared with the conventional method, and the environmental load can be reduced.

In the present invention, the “biomass degree” may be indicated by a value obtained by measuring the content of biomass-derived carbon by radioactive carbon (C14) measurement, or may be indicated by a weight ratio of biomass-derived components.

When the value obtained by measuring the content of biomass-derived carbon by radioactive carbon (C14) measurement is indicated as the "biomass degree", the "biomass degree" can be obtained as follows. That is, since carbon dioxide in the atmosphere contains a certain proportion of C14 (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. is known to be It is also known that fossil fuels contain almost no C14. Therefore, by measuring the ratio of C14 contained in the total carbon atoms in the polyester, the ratio of biomass-derived carbon can be calculated. In the present invention, the biomass-derived carbon content _{Pbio can be determined as follows, where Pc14} is the content of _C14 in the polyester.
P _bio (%) = P _C14 /105.5 x 100

Taking polyethylene terephthalate, which is a typical polyester, as an example, polyethylene terephthalate is obtained by polymerizing ethylene glycol containing 2 carbon atoms and terephthalic acid containing 8 carbon atoms at a molar ratio of 1:1. When only biomass-derived carbon is used as P, the biomass-derived carbon content P _bio in polyethylene terephthalate is 20%. On the other hand, the content of biomass-derived carbon in the fossil fuel-derived polyethylene terephthalate produced using fossil fuel-derived ethylene glycol and fossil fuel-derived dicarboxylic acid is 0%. The biomass degree becomes 0%.

Further, when the "biomass degree" is represented by the weight ratio of biomass-derived components, the "biomass degree" can be obtained as follows. Taking polyethylene terephthalate as an example, polyethylene terephthalate is obtained by polymerizing ethylene glycol containing 2 carbon atoms and terephthalic acid containing 8 carbon atoms at a molar ratio of 1:1. When only the material is used, the biomass degree is about 30% because the weight ratio of the biomass-derived component in the polyester is about 30%. In addition, the weight ratio of the biomass-derived component in the fossil fuel-derived polyester produced using fossil fuel-derived ethylene glycol and fossil fuel-derived dicarboxylic acid is 0%, and the biomass degree of the fossil fuel-derived polyester is 0%. Hereinafter, unless otherwise specified, the “biomass degree” indicates the weight ratio of biomass-derived components.

When the first base film 22 contains a biomass-derived component, the degree of biomass in the first base film 22 is 5% or more, preferably 10% or more and 30% or less, more preferably 15% or more and 25%. % or less. If the degree of biomass in the first base film 22 is 5% or more, the amount of fossil fuel-derived polyester can be reduced compared to the conventional case, and the environmental load can be reduced.

Biomass-derived ethylene glycol is produced from biomass-derived ethanol (biomass ethanol). For example, biomass-derived ethylene glycol can be obtained by a method in which biomass ethanol is converted into ethylene glycol via ethylene oxide by a conventionally known method. Also, commercially available biomass ethylene glycol may be used, and for example, biomass ethylene glycol commercially available from India Glycol can be preferably used.

The dicarboxylic acid unit of biomass polyester uses the dicarboxylic acid derived from a fossil fuel. As dicarboxylic acids, aromatic dicarboxylic acids, aliphatic dicarboxylic acids, and derivatives thereof can be used without limitation. Examples of aromatic dicarboxylic acids include terephthalic acid and isophthalic acid. Examples of derivatives of aromatic dicarboxylic acids include lower alkyl esters of aromatic dicarboxylic acids, specifically methyl esters, ethyl esters, propyl esters and butyl esters. Ester etc. are mentioned. Among these, terephthalic acid is preferred, and dimethyl terephthalate is preferred as the aromatic dicarboxylic acid derivative.

Further, as the aliphatic dicarboxylic acid, specifically, oxalic acid, succinic acid, glutaric acid, adipic acid, sebacic acid, dodecanedioic acid, dimer acid, cyclohexanedicarboxylic acid, etc., usually having 2 to 40 carbon atoms. chain or alicyclic dicarboxylic acids. In addition, as derivatives of aliphatic dicarboxylic acids, lower alkyl esters such as methyl esters, ethyl esters, propyl esters and butyl esters of the above aliphatic dicarboxylic acids and cyclic acid anhydrides of the above aliphatic dicarboxylic acids such as succinic anhydride are used. mentioned. Among these, adipic acid, succinic acid, dimer acid, or mixtures thereof are preferred, and those containing succinic acid as a main component are particularly preferred. More preferred derivatives of aliphatic dicarboxylic acids are methyl esters of adipic acid and succinic acid, or mixtures thereof. These dicarboxylic acids may be used alone or in combination of two or more.

The biomass polyester may be a copolymerized polyester obtained by adding a copolymerized component as a third component in addition to the above diol component and dicarboxylic acid component. Specific examples of copolymer components include bifunctional oxycarboxylic acids, trifunctional or higher polyhydric alcohols for forming a crosslinked structure, trifunctional or higher polycarboxylic acids and/or their anhydrides, and 3 At least one polyfunctional compound selected from the group consisting of functional or higher oxycarboxylic acids is included. Among these copolymerization components, a bifunctional and/or trifunctional or higher oxycarboxylic acid is particularly preferably used because a copolyester having a high degree of polymerization tends to be easily produced. Among them, the use of a tri- or higher functional oxycarboxylic acid is most preferable because a polyester with a high degree of polymerization can be easily produced with a very small amount without using a chain extender to be described later.

A biomass polyester can be obtained by a conventionally known method of polycondensing the above-described diol units and dicarboxylic acid units. Specifically, after performing the esterification reaction and / or transesterification reaction of the dicarboxylic acid component and the diol component, a general method of melt polymerization such as performing a polycondensation reaction under reduced pressure, or an organic solvent can be produced by a known solution heating dehydration condensation method using The amount of diol used in the production of biomass polyester is substantially equimolar with respect to 100 mol of dicarboxylic acid or derivative thereof, but generally esterification and / or transesterification reaction and / or polycondensation reaction It is preferable to use an excess amount of 0.1 mol % or more and 20 mol % or less because there is a distillate in the middle.

A resin composition of biomass polyester or a resin composition containing biomass polyester and fossil fuel-derived polyester can be used to form a film by, for example, a T-die method to form the first base film 22. Specifically, after drying the above resin composition, it is supplied to a melt extruder heated to a temperature above the melting point Tm of the resin composition to Tm + 70 ° C. to melt the resin composition, for example. The first base film 22 can be formed by extruding a sheet from a die such as a T-die and rapidly cooling and solidifying the extruded sheet with a rotating cooling drum or the like. As the melt extruder, a single-screw extruder, a twin-screw extruder, a vent extruder, a tandem extruder, or the like can be used depending on the purpose.

Biomass polyethylene is a monomer polymer containing ethylene derived from biomass. The details of the biomass polyethylene will be described in the description of the sealant layer 40 .

When the first base film 22 is formed of a material that does not contain biomass-derived components, the first base film 22 may be, for example, a polyester film such as polyethylene terephthalate film or polybutylene terephthalate, or a polyolefin film such as polyethylene film or polypropylene film. A film, a polyamide film such as a nylon film or a nylon 6/meta-xylylenediamine nylon 6 coextruded and costretched film, or a polypropylene/ethylene-vinyl alcohol copolymer coextruded and costretched film, or a laminate of two or more of these films. Plastic films such as composite films can be used. The plastic film may be coated with polyvinyl alcohol or the like.

The first base film 22 may be a stretched plastic film stretched in a predetermined direction. In this case, the first base film 22 may be a uniaxially stretched film stretched in one predetermined direction, or a biaxially stretched film stretched in two predetermined directions. A stretched plastic film is obtained, for example, by heating a plastic film extruded onto a cooling drum by roll heating, infrared heating, or the like, and stretching it in the longitudinal direction. This stretching is preferably carried out using a difference in circumferential speed between two or more rolls. Longitudinal stretching is usually performed in a temperature range of 50°C or higher and 100°C or lower. Further, the longitudinal stretching ratio is preferably 2.5 times or more and 4.2 times or less, although it depends on the properties required for the film application. If the draw ratio is less than 2.5 times, the thickness unevenness of the film becomes large, making it difficult to obtain a good film.

The longitudinally stretched film is then successively subjected to transverse stretching, heat setting, and heat relaxation steps to obtain a biaxially stretched film. Lateral stretching is usually performed in a temperature range of 50°C or higher and 100°C or lower. The lateral stretching ratio is preferably 2.5 times or more and 5.0 times or less, although it depends on the properties required for the application. If it is less than 2.5 times, the thickness of the film becomes uneven, making it difficult to obtain a good film.

The film breaking strength of the first base film 22 is, for example, 5 kg/mm ² or more and 40 kg/mm ^{2 or less in the MD direction and 5 kg/mm 2 or more and 35 kg/mm 2 or less} in the TD direction. is, for example, 50% or more and 350% or less in the MD direction and 50% or more and 300% or less in the TD direction. Also, the shrinkage rate when left in a temperature environment of 150° C. for 30 minutes is, for example, 0.1% or more and 5% or less.

When the first base film 22 is a biomass polyester film or a polyester film, the thickness of the first base film 22 is preferably 6 μm or more and 20 μm or less, more preferably 12 μm or more and 16 μm or less.
When the first base film 22 is a polyamide film, the thickness of the first base film 22 is preferably 10 μm or more and 30 μm or less, more preferably 15 μm or more and 25 μm or less.
When the first base film 22 is a polypropylene film, the thickness of the first base film 22 is preferably 15 μm or more and 50 μm or less, more preferably 20 μm or more and 30 μm or less.
When the first base film 22 is a biomass polyethylene film or a polyethylene film, the thickness of the first base film 22 is preferably 10 μm or more and 80 μm or less, more preferably 30 μm or more and 60 μm or less.

The first base film 22 may be a single-layer film or a co-extruded film of two or more layers.

(Second base film)
The second base film 32 of the intermediate layer 30 is a plastic film similar to the first base film 22 . Like the first base film 22, the second base film 32 may or may not contain a biomass-derived component.

As the plastic film of the second base film 32, among the plastic films given as examples of the first base film 22, biomass polyester, polyester film, or polyamide film can be particularly preferably used.

(Third base film)
The third base film 36 of the intermediate layer 30 is a plastic film similar to the first base film 22 . Like the first base film 22, the third base film 36 may or may not contain a biomass-derived component.

As the plastic film of the third base film 36, among the plastic films given as examples of the first base film 22, a biomass polyester film, a polyester film, or a polyamide film can be preferably used.

(metal foil)
The metal foil 34 of the intermediate layer 30 is a member obtained by rolling metal. A conventionally known metal foil can be used as the metal foil 34 . Aluminum foil is preferable from the viewpoint of gas barrier properties that prevent permeation of oxygen gas and water vapor, and light shielding properties that prevent permeation of visible light, ultraviolet rays, and the like.

(Print layer)
The printed layer 50 is a layer formed by printing for decoration, display of contents, display of best-before date, display of manufacturer, seller, etc., and for imparting aesthetics. The print layer 50 includes a pattern layer that forms any desired pattern such as pictures, photographs, characters, numbers, graphics, symbols, and patterns. The printed layer may further include a ground color layer formed by printing so as to make the pattern of the pattern layer stand out. The print layer 50 contains a coloring agent and a cured product of a polyol and an isocyanate compound. The print layer 50 contains a biomass-derived component. Specifically, the printed layer 50 can be formed using a cured product in which at least one of a polyol as a main agent and an isocyanate compound as a curing agent contains a biomass-derived component. As the polyol, a polyester polyol which is a reaction product of a polyfunctional alcohol and a polyfunctional carboxylic acid, or a polyether polyol which is a reaction product of a polyfunctional alcohol and a polyfunctional isocyanate can be used.

[Polyester polyol]
When the polyester polyol contains a biomass-derived component, at least one of the polyfunctional alcohol and the polyfunctional carboxylic acid contains the biomass-derived component. Examples of polyester polyols containing biomass-derived components include the following.
・Reaction product of biomass-derived polyfunctional alcohol and biomass-derived polyfunctional carboxylic acid ・Reaction product of fossil fuel-derived polyfunctional alcohol and biomass-derived polyfunctional carboxylic acid ・Biomass-derived polyfunctional alcohol and fossil fuel-derived reactant with polyfunctional carboxylic acid

As polyfunctional alcohols derived from biomass, aliphatic polyfunctional alcohols obtained from plant materials such as corn, sugarcane, cassava, and sago palm can be used. Examples of biomass-derived aliphatic polyfunctional alcohols include polypropylene glycol (PPG), neopentyl glycol (NPG), ethylene glycol (EG), diethylene glycol (DEG), and butylene obtained from plant materials by the following methods. There are glycol (BG), hexamethylene glycol, etc., and any of them can be used. These may be used alone or in combination.

Biomass-derived polypropylene glycol is produced from glycerol via 3-hydroxypropylaldehyde (HPA) by a fermentation process in which the plant material is degraded to yield glucose. Compared with polypropylene glycol produced by the EO production method, polypropylene glycol produced by a bio-method such as the fermentation method yields useful by-products such as lactic acid from the standpoint of safety, and the production cost can be kept low. It is also preferred that it is possible.
Biomass-derived butylene glycol can be produced by producing succinic acid obtained by producing and fermenting glycol from a plant raw material, and then hydrogenating the succinic acid.
Biomass-derived ethylene glycol can be produced, for example, from bioethanol obtained by a conventional method via ethylene.

As polyfunctional alcohols derived from fossil fuels, compounds having 2 or more, preferably 2 to 8 hydroxyl groups in one molecule can be used. Specifically, polyfunctional alcohols derived from fossil fuels are not particularly limited and conventionally known substances can be used, for example, polypropylene glycol (PPG), neopentyl glycol (NPG), ethylene glycol (EG) , diethylene glycol (DEG), butylene glycol (BG), hexamethylene glycol, triethylene glycol, dipropylene glycol, 1,4-cyclohexanedimethanol, trimethylolpropane, glycerin, 1,9-nonanediol, 3-methyl -1,5-Pentanediol, polyether polyols, polycarbonate polyols, polyolefin polyols, acrylic polyols, and the like can be used. These may be used alone or in combination of two or more.

Biomass-derived polyfunctional carboxylic acids include reproducible plant-derived oils such as soybean oil, linseed oil, tung oil, coconut oil, palm oil, and castor oil, and the recycling of waste edible oils, etc. Aliphatic polyfunctional carboxylic acids obtained from plant sources such as oils can be used. Examples of biomass-derived aliphatic polyfunctional carboxylic acids include sebacic acid, succinic acid, phthalic acid, adipic acid, glutaric acid, and dimer acid. For example, sebacic acid is produced with heptyl alcohol as a by-product by alkaline thermal decomposition of ricinoleic acid obtained from castor oil. In the present invention, it is particularly preferable to use biomass-derived succinic acid or biomass-derived sebacic acid. These may be used alone or in combination of two or more.

Aliphatic polyfunctional carboxylic acids and aromatic polyfunctional carboxylic acids can be used as polyfunctional carboxylic acids derived from fossil fuels. Aliphatic polyfunctional carboxylic acids derived from fossil fuels are not particularly limited and conventionally known substances can be used. For example, adipic acid, dodecanedioic acid, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, maleic anhydride acid, itaconic anhydride, sebacic acid, succinic acid, glutaric acid, dimer acid, and ester compounds thereof; In addition, the aromatic polyfunctional carboxylic acid derived from fossil fuels is not particularly limited and conventionally known substances can be used. Examples include isophthalic acid, terephthalic acid, naphthalenedicarboxylic acid, phthalic anhydride, trimellitic acid, and pyromellitic acid, and their ester compounds and the like can be used. These may be used alone or in combination of two or more.

[Polyether polyol]
When the polyether polyol contains a biomass-derived component, at least one of the polyfunctional alcohol and the polyfunctional isocyanate contains the biomass-derived component. Examples of polyether polyols containing biomass-derived components include the following.
・Reaction products of biomass-derived polyfunctional alcohols and biomass-derived polyfunctional isocyanates ・Reaction products of fossil fuel-derived polyfunctional alcohols and biomass-derived polyfunctional isocyanates ・Biomass-derived polyfunctional alcohols and fossil fuel-derived polyfunctional Reactants with functional isocyanates

As the biomass-derived polyfunctional alcohol and the fossil fuel-derived polyfunctional alcohol, the biomass-derived polyfunctional alcohol and the fossil fuel-derived polyfunctional alcohol described in the polyester polyol can be used.

As a biomass-derived polyfunctional isocyanate, a plant-derived divalent carboxylic acid is acid-amidated, converted to a terminal amino group by reduction, and further reacted with phosgene to convert the amino group to an isocyanate group. What is obtained can be used. The biomass-derived polyfunctional isocyanate is, for example, a biomass-derived diisocyanate. Biomass-derived diisocyanates include dimer acid diisocyanate (DDI), octamethylene diisocyanate, decamethylene diisocyanate, and the like. A plant-derived diisocyanate can also be obtained by using a plant-derived amino acid as a raw material and converting the amino group into an isocyanate group. For example, lysine diisocyanate (LDI) is obtained by methyl-esterifying the carboxyl group of lysine and then converting the amino group into an isocyanate group. Also, 1,5-pentamethylene diisocyanate can be obtained by decarboxylating the carboxyl group of lysine and then converting the amino group to an isocyanate group.

Other methods for synthesizing 1,5-pentamethylene diisocyanate include phosgenation and carbamate methods. More specifically, the phosgenation method includes a method in which 1,5-pentamethylenediamine or a salt thereof is reacted directly with phosgene, and a hydrochloride of pentamethylenediamine suspended in an inert solvent and reacted with phosgene. 1,5-pentamethylene diisocyanate is synthesized by the method. In the carbamate conversion method, first, 1,5-pentamethylenediamine or a salt thereof is carbamate to form pentamethylenedicarbamate (PDC), which is then thermally decomposed to produce 1,5-pentamethylenediisocyanate. Synthesis. Polyisocyanates that are preferably used in the present invention include 1,5-pentamethylene diisocyanate-based polyisocyanates (trade name: STABIO (registered trademark)) manufactured by Mitsui Chemicals, Inc.

The polyfunctional isocyanate derived from fossil fuels is not particularly limited, and conventionally known substances can be used. 1,3-phenylene diisocyanate, 4-chloro-1,3-phenylene diisocyanate, 4-butoxy-1,3-phenylene diisocyanate, 2,4-diisocyanatodiphenyl ether, 4,4′-methylenebis(phenylene isocyanate) (MDI), Aromatic diisocyanates such as dulylene diisocyanate, tolidine diisocyanate, xylylene diisocyanate (XDI), 1,5-naphthalene diisocyanate, benzidine diisocyanate, o-nitrobenzidine diisocyanate, 4,4′-diisocyanate dibenzyl, and the like. In addition, aliphatic diisocyanates such as methylene diisocyanate, 1,4-tetramethylene diisocyanate, 1,6-hexamethylene diisocyanate, and 1,10-decamethylene diisocyanate; 1,4-cyclohexylene diisocyanate, 4,4-methylenebis(cyclohexyl isocyanate) ), 1,5-tetrahydronaphthalene diisocyanate, isophorone diisocyanate, hydrogenated MDI, hydrogenated XDI and other alicyclic diisocyanates. These may be used alone or in combination of two or more.

[Coloring agent]
The coloring agent is not particularly limited, and conventionally known pigments and dyes can be used.

When the printed layer 50 contains a biomass-derived component, the printed layer 50 preferably has a biomass degree of 5% or more, more preferably 5% or more and 50% or less, and still more preferably 10% or more and 50% or less. If the degree of biomass is within the above range, the amount of fossil fuel used can be reduced, and the environmental load can be reduced.

The weight of the printed layer 50 after drying is preferably 0.1 g/m ² or more and 10 g/m ² or less, more preferably 1 g/m ² or more and 5 g/m ² or less, and still more preferably 1 g/m ² or more and 3 g/m 2 or more. ² or less.

The print layer 50 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 still more preferably 1 μm or more and 3 μm or less.

(adhesive layer)
Adhesive layers such as the first adhesive layer 26, the intermediate adhesive layer 38, and the second adhesive layer 44 are combined with any two layers constituting the packaging material 10, for example, the printed layer 50 and the second base film 32. It is a layer that performs the function of adhering The adhesive layer contains a cured product of polyol and isocyanate compound.

At least one of the first adhesive layer 26, the intermediate adhesive layer 38 and the second adhesive layer 44 may include a biomass-derived component. For example, only one of first adhesive layer 26, intermediate adhesive layer 38, or second adhesive layer 44 may include a biomass-derived component. Alternatively, two of the first adhesive layer 26, the intermediate adhesive layer 38 and the second adhesive layer 44 may contain biomass-derived components. Alternatively, the first adhesive layer 26, the intermediate adhesive layer 38 and the second adhesive layer 44 may all contain biomass-derived components. In the adhesive layer containing a biomass-derived component, at least either the polyol or the isocyanate compound contains a biomass-derived component. Alternatively, none of the first adhesive layer 26, intermediate adhesive layer 38, and second adhesive layer 44 may contain biomass-derived components.

As the isocyanate compound containing a biomass-derived component in the adhesive layer, the same isocyanate compound containing a biomass-derived component as in the print layer 50 can be used. Moreover, in the adhesive layer, as the polyol containing the biomass-derived component, the same polyol as that for the print layer 50 can be used. When both the printed layer 50 and the adhesive layer are formed using a cured product containing a biomass-derived component, the cured product in the printed layer 50 and the cured product in the adhesive layer may have the same composition or may have different compositions. Composition is also acceptable.

The adhesive layer preferably has a biomass degree of 5% or more, more preferably 5% or more and 50% or less, still more preferably 30% or more and 50% or less. If the degree of biomass is within the above range, the amount of fossil fuel used can be reduced, and the environmental load can be reduced.

The weight of the adhesive layer after drying is preferably 0.1 g/m ² or more and 10 g/m ² or less, more preferably 1 g/m ² or more and 6 g/m ² or less, still more preferably 2 g/m ² or more and 5 g/m 2 or more. ² or less.

The adhesive layer preferably has a thickness of 0.1 μm to 10 μm, more preferably 1 μm to 6 μm, even more preferably 2 μm to 5 μm.

(sealant layer)
Sealant film 42 of sealant layer 40 constitutes inner surface 10 x of packaging material 10 . The sealant film 42 of the sealant layer 40 may contain a biomass-derived component or may not contain a biomass-derived component. When the sealant layer 40 is formed from a material containing a biomass-derived component, the sealant layer 40 can be formed using the following biomass polyolefin. When the sealant layer 40 is formed of a material that does not contain biomass-derived components, the sealant layer 40 can be formed using a conventionally known fossil fuel-derived thermoplastic resin.

Biomass polyolefins are polymers of monomers containing olefins such as ethylene derived from biomass. Since biomass-derived olefins are used as raw material monomers, the polymerized polyolefins are biomass-derived. Note that the polyolefin raw material monomer does not have to contain 100% by mass of biomass-derived olefin.

For example, biomass-derived ethylene can be produced using biomass-derived ethanol as a raw material. In particular, it is preferable to use biomass-derived fermented ethanol obtained from plant raw materials. Plant raw materials are not particularly limited, and conventionally known plants can be used. For example, corn, sugar cane, beets, and manioc can be mentioned.

Biomass-derived fermented ethanol refers to ethanol produced by contacting a culture solution containing a carbon source obtained from a plant material with a microorganism that produces ethanol or a product derived from a crushed product thereof, followed by purification. Conventionally known methods such as distillation, membrane separation, and extraction can be applied to purify ethanol from the culture medium. For example, a method of adding benzene, cyclohexane or the like to cause azeotropy or removing water by membrane separation or the like can be mentioned.

The monomer that is the raw material for the biomass polyolefin may further contain a fossil fuel-derived ethylene monomer and/or a fossil fuel-derived α-olefin monomer, or may further contain a biomass-derived α-olefin monomer.

Although the number of carbon atoms of the α-olefin is not particularly limited, those having 3 to 20 carbon atoms can usually be used, and preferably butylene, hexene, or octene. This is because butylene, hexene, or octene can be produced by polymerization of ethylene, which is a raw material derived from biomass. In addition, by containing such an α-olefin, the polymerized polyolefin has alkyl groups as a branched structure, so that it can be made more flexible than a simple straight-chain polyolefin.

As the biomass polyolefin, polyethylene or a copolymer of ethylene and α-olefin may be used alone, or two or more of them may be mixed and used. In particular, the biomass polyolefin is preferably polyethylene. This is because the use of ethylene, which is a biomass-derived raw material, theoretically enables production from 100% biomass-derived components.

The biomass polyolefin may contain two or more biomass polyolefins with different biomass degrees, and the biomass degree of the polyolefin resin layer as a whole may be within the range described later.

The biomass polyolefin is preferably 0.91 g/cm ³ or more and 0.93 g/cm ³ or less, more preferably 0.912 g/cm ³ or more and 0.928 g/cm ³ or less, still more preferably 0.915 g/cm ³ or more and 0.928 g/cm 3 or more. It has a density of 0.925 g/cm ³ or less. The density of biomass polyolefin is a value measured according to the method specified in A method of JIS K7112-1980 after annealing according to JIS K6760-1995. If the biomass polyolefin has a density of 0.91 g/cm ³ or more, the rigidity of the polyolefin resin layer containing the biomass polyolefin can be increased, and it can be suitably used as an inner layer of packaging products. Also, if the density of the biomass polyolefin is 0.93 g/cm ³ or less, the transparency and mechanical strength of the polyolefin resin layer containing the biomass polyolefin can be enhanced, and it can be suitably used as the inner layer of packaging products.

The biomass polyolefin has a melt flow of 0.1 g/10 minutes or more and 10 g/10 minutes or less, preferably 0.2 g/10 minutes or more and 9 g/10 minutes or less, more preferably 1 g/10 minutes or more and 8.5 g/10 minutes or less. rate (MFR). The melt flow rate is a value measured by method A under conditions of a temperature of 190° C. and a load of 21.18 N in the method specified in JIS K7210-1995. If the MFR of the biomass polyolefin is 0.1 g/10 minutes or more, the extrusion load during molding can be reduced. Moreover, if the MFR of the biomass polyolefin is 10 g/10 minutes or less, the mechanical strength of the polyolefin resin layer containing the biomass polyolefin can be increased.

Examples of biomass polyolefins that are preferably used include low-density polyethylene derived from biomass manufactured by Braskem (trade name: SBC818, density: 0.918 g/cm ³ , MFR: 8.1 g/10 min, biomass degree of 95%), Braskem biomass-derived low-density polyethylene (trade name: SPB681, density: 0.922 g/cm ³ , MFR: 3.8 g/10 min, biomass degree 95%), Braskem biomass-derived linear low-density polyethylene (trade name: SLL118, density: 0.916 g/cm ³ , MFR: 1.0 g/10 min, biomass degree 87%);

Examples of the above fossil fuel-derived thermoplastic resins include low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene, propylene-ethylene copolymer, ethylene-vinyl acetate copolymer, Ethylene-acrylic acid copolymers, ethylene-methacrylic acid copolymers, ethylene-methyl acrylate copolymers, ethylene-ethyl acrylate copolymers, ethylene-methyl methacrylate copolymers, ionomers and the like can be mentioned.

The sealant film 42 preferably has a biomass degree of 5% or more, more preferably 5% or more and 60% or less, still more preferably 10% or more and 60% or less. If the degree of biomass is within the above range, the amount of fossil fuel used can be reduced, and the environmental load can be reduced. The above biomass degree is a value indicated by weight ratio, but it can also be indicated as a value obtained by measuring the content of biomass-derived carbon by radiocarbon (C14) measurement. That is, by measuring the ratio of C14 contained in all carbon atoms in the sealant layer, the ratio of biomass-derived carbon can be calculated.
When the content of C14 in the sealant layer is P _C14 , the content P _bio of biomass-derived carbon is, similarly to the above, the following formula P _bio (%) = P _C14 /105.5 × 100
can be obtained by The biomass degree of polyethylene produced using ethylene, which is a biomass-derived raw material, may be expressed as a weight ratio or as a value obtained by measuring the content of biomass-derived carbon by radiocarbon (C14) measurement. same value.

The layer constituting the sealant film 42 may be a single layer or multiple layers. When using a biomass polyolefin as described above for sealant film 42, sealant film 42 may comprise three layers: an inner layer, an intermediate layer, and an outer layer. In this case, it is preferable that the intermediate layer is made of biomass polyolefin or biomass polyolefin and conventionally known fossil fuel-derived polyolefin, and the inner layer and the outer layer are made of conventionally known fossil fuel-derived polyolefin.

The sealant film 42 preferably has a thickness of 10 μm to 300 μm, more preferably 20 μm to 200 μm, even more preferably 30 μm to 150 μm.

(evaporation layer)
The vapor deposition layer 60 is a vapor deposition film made of inorganic substances and/or inorganic oxides. The deposited film can be formed by a conventionally known method using a conventionally known inorganic substance or inorganic oxide, and the composition and formation method are not particularly limited. The packaging material 10 may have two or more vapor deposition layers 60 . When the vapor deposition layer 60 has two or more layers, each layer may have the same composition or may have a different composition.

As the deposition layer 60, for example, silicon (Si), aluminum (Al), magnesium (Mg), calcium (Ca), potassium (K), tin (Sn), sodium (Na), boron (B), titanium (Ti), lead (Pb), zirconium (Zr), yttrium (Y), and other inorganic substances or inorganic oxide deposited films can be used.

Vapor-deposited films of inorganic oxides such as silicon oxide and aluminum oxide have transparency. When the vapor deposition layer 60 is positioned closer to the outer surface 10 y than the printed layer 50 , a transparent vapor deposition film of inorganic oxide is used as the vapor deposition layer 60 .

Inorganic oxides are represented by MO _X such as SiO _X and AlO _X (wherein M represents an inorganic element, and the value of X varies depending on the inorganic element). expressed. The range of values of X is 0 to 2 for silicon (Si), 0 to 1.5 for aluminum (Al), 0 to 1 for magnesium (Mg), 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, Titanium (Ti) can range from 0 to 2, lead (Pb) from 0 to 1, zirconium (Zr) from 0 to 2, and yttrium (Y) from 0 to 1.5. In the above, when X=0, it is a completely inorganic substance (pure substance) and not transparent, and the upper limit of the range of X is the fully oxidized value. As the vapor deposition layer 60 of the packaging material 10, silicon (Si) and aluminum (Al) are preferably used. Values in the range of 0.5 can be used.

The film thickness of the vapor-deposited film of the inorganic substance or inorganic oxide as described above varies depending on the type of inorganic substance or inorganic oxide used. It is desirable to select and form them arbitrarily. More specifically, in the case of a vapor deposited film of aluminum, the film thickness is desirably 50 Å or more and 600 Å or less, more preferably 100 Å or more and 450 Å or less. The film thickness is desirably 50 Å or more and 500 Å or less, more preferably 100 Å or more and 300 Å or less.

The vapor deposition layer 60 can be formed on the first base film 22, the second base film 32, etc. using the following forming method. As a method for forming the deposited layer 60, for example, a physical vapor deposition method (physical vapor deposition method, PVD method) such as a vacuum deposition method, a sputtering method, and an ion plating method, or a plasma chemical vapor deposition method, a thermal A chemical vapor deposition method (Chemical Vapor Deposition method, CVD method) such as a chemical vapor deposition method and a photochemical vapor deposition method can be used.

(Gas barrier coating film)
The gas barrier coating film 62 is a film provided on the deposition layer 60 as required. The gas barrier coating film 62 functions as a layer that suppresses permeation of oxygen gas and water vapor. The gas barrier coating film 62 has the general formula R ¹ _n M (OR ² ) _m (wherein R ¹ and R ² represent an organic group having 1 to 8 carbon atoms, M represents a metal atom, 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 or more alkoxides represented by the above polyvinyl alcohol A gas-barrier composition containing a base resin and/or an ethylene-vinyl alcohol copolymer, and polycondensed by the sol-gel method in the presence of a sol-gel catalyst, acid, water, and an organic solvent. .

As the alkoxide represented by the general formula R ¹ _n M(OR ² ) _m , at least one of partial hydrolyzate of alkoxide and condensate of hydrolysis of alkoxide can be used. The partial hydrolyzate of the above alkoxide does not need to have all of the alkoxy groups hydrolyzed, and may be those in which one or more alkoxy groups are hydrolyzed, or a mixture thereof. As the condensate obtained by hydrolysis of alkoxide, a partially hydrolyzed alkoxide dimer or higher, specifically a dimer to hexamer, is used.

In the alkoxide represented by the general formula R ¹ _n M(OR ² ) _m , the metal atom represented by M can be silicon, zirconium, titanium, aluminum, or the like. In this embodiment, preferred metals include, for example, silicon and titanium. In the present invention, alkoxides can be used either singly or as a mixture of alkoxides of two or more different metal atoms in the same solution.

Further, in the alkoxide represented by the general formula R ¹ _n M(OR ² ) _m , specific examples of the organic group represented by R ¹ include a methyl group, an ethyl group, an n-propyl group, i -propyl group, n-butyl group, i-butyl group, sec-butyl group, t-butyl group, n-hexyl group, n-octyl group, and the like. Further, in the alkoxide represented by the general formula R ¹ _n M(OR ² ) _m , specific examples of the organic group represented by R ² include a methyl group, an ethyl group, an n-propyl group, i -propyl group, n-butyl group, sec-butyl group, and the like. These alkyl groups may be the same or different in the same molecule.

For example, a silane coupling agent may be added when preparing the gas barrier composition. Known organic reactive group-containing organoalkoxysilanes can be used as the silane coupling agent. In this embodiment, an organoalkoxysilane having an epoxy group is particularly preferably used. Specifically, examples include γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, or , β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and the like can be used. The above silane coupling agents may be used singly or in combination of two or more.

The packaging material 10 may further include a thermoplastic resin layer as another layer. The same material as the sealant layer can be used for the thermoplastic resin layer.

<Method for manufacturing packaging material>
Next, an example of a method for manufacturing a laminate constituting the packaging material 10 will be described.

First, the substrate layer 20 and the intermediate layer 30 described above are prepared. A printed layer 50 is provided in advance on either the base layer 20 or the intermediate layer 30 . In addition, the substrate layer 20 or the intermediate layer 30 may contain a vapor deposition layer 60 and a gas barrier coating film 62 as necessary.

Subsequently, the base material layer 20 and the intermediate layer 30 are laminated via the first adhesive layer 26 by a dry lamination method. After that, the laminate including the base material layer 20 and the intermediate layer 30 and the sealant layer 40 are laminated via the second adhesive layer 44 by a dry lamination method. Thereby, the packaging material 10 including the base material layer 20, the intermediate layer 30 and the sealant layer 40 can be obtained.

Alternatively, first, the intermediate layer 30 and the sealant layer 40 are laminated via the second adhesive layer 44 by a dry lamination method, and then the laminate including the base layer 20 and the intermediate layer 30 and the sealant layer 40 is laminated. The packaging material 10 may be produced by laminating by a dry lamination method with one adhesive layer 26 interposed therebetween.

In the dry lamination method, first, an adhesive composition is applied to one of the two films to be laminated. Subsequently, the applied adhesive composition is dried to volatilize the solvent. The two films are then laminated via the dried adhesive composition. Subsequently, the two laminated films are aged in an environment of, for example, 20° C. or higher for 24 hours or longer in a wound state.

The packaging material 10 is provided with a chemical function, an electrical function, a magnetic function, a mechanical function, a friction/abrasion/lubricating function, an optical function, a thermal function, and a surface function such as biocompatibility. , it is also possible to apply secondary processing. 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, coating, etc.). Also, the packaging material according to the present invention can be subjected to lamination (dry lamination or extrusion lamination), bag making, and other post-treatments to produce a molded product.

<Packaging products>
Examples of packaging products formed by using the packaging material 10 include packaging bags, laminated tubes, lids, sheet molded products, label materials, and the like.

Packaged products that include the packaging material 10 include, for example, food and beverages, fruit juices, juices, drinking water, sake, cooked foods, fish paste products, frozen foods, meat products, simmered dishes, rice cakes, and liquid soups such as hotpot soups. , various food and drink products such as seasonings, cosmetics such as liquid detergents, shampoos, rinses and conditioners, sanitary products, daily necessities and chemical products. Specific examples of food and drink include coffee, coffee beans, coffee powder, ice cream, gummies, side dishes, pasta sauce, curry, jelly, bacon, chocolate, and chocolate paste. Specific examples of daily necessities include absorbent cotton, masks, bath agents, powdered milk, and the like. In addition, as illustrated in the examples described later, the packaged product provided with the packaging material 10 configured to have heat resistance is used for containing contents that are subjected to heat sterilization treatment such as retort treatment and boiling treatment. can be used. Note that the retort treatment is a process of heating the packaged product under pressure using steam or heated hot water after filling the packaged product with contents and sealing the packaged product. The temperature of the retort treatment is, for example, 120° C. or higher. Boiling treatment is a process in which the contents are filled into a packaged product, the packaged product is sealed, and then the packaged product is boiled in hot water under atmospheric pressure. The boiling treatment temperature is, for example, 90° C. or higher and 100° C. or lower.

The packaging bag for the packaged product is made by folding the packaging material 10 in two or by preparing two sheets of the packaging material 10 and placing the sealant layer 40 of the packaging material 10 on the front side and the sealant layer 40 of the packaging material 10 on the back side facing each other. Then, the peripheral edge is subjected to, for example, a side seal type, a two-side seal type, a three-side seal type, a four-side seal type, an envelope-sticking seal type, a palm-sticking seal type (pillow seal type), a pleated seal type, Various forms of packaging bags can be manufactured by heat sealing in a heat-sealing form such as a flat-bottom seal type or a square-bottom seal type. A gusset type packaging bag can also be manufactured by performing heat sealing in a state in which the folded packaging material 10 is inserted between the packaging material 10 on the front side and the packaging material 10 on the back side. Note that not all the packaging material 10 that constitutes the packaging bag may be the packaging material 10 according to the present invention. That is, at least part of the packaging material 10 constituting the packaging bag may be the packaging material 10 having an adhesive layer containing a biomass-derived component, and the other part of the packaging material 10 constituting the packaging bag is derived from fossil fuels. The packaging material 10 may have an adhesive layer of

As the heat sealing method, known methods such as bar sealing, rotary roll sealing, belt sealing, impulse sealing, high frequency sealing, and ultrasonic sealing can be used.

FIG. 11 is a diagram showing an example of a packaging bag 70 including the packaging material 10. As shown in FIG. The bag 70 includes a surface film 74 that forms the front surface, a back surface film 75 that forms the back surface, and a lower film 76 that forms the lower portion 72 . The lower film 76 is arranged between the surface film 74 and the back film 75 while being folded back at the folding portion 76f. Thus, the packaging bag 70 shown in FIG. 11 is a self-supporting standing pouch whose lower portion is configured as a gusset.

The inner surfaces of the surface film 74, the back film 75 and the lower film 76 are joined together by sealing portions. In the front view of the packaging bag 70 such as FIG. 11, the sealing portion is hatched. As shown in FIG. 11 , the seal portion has an outer edge seal portion extending along the outer edge of the packaging bag 70 . The outer edge seal portion includes a lower seal portion 72 a extending over the lower portion 72 and a pair of side seal portions 73 a extending along the pair of side portions 73 . As shown in FIG. 11, the upper portion 71 of the bag 70 is an opening 71b in the packaging bag 70 before the content is filled (the state in which the content is not filled). After the contents are contained in the packaging bag 70 , the inner surface of the surface film 74 and the inner surface of the back film 75 are joined at the upper portion 71 to form an upper sealing portion and the packaging bag 70 is sealed.

It should be noted that the above-mentioned terms "surface film", "back surface film" and "lower film" are merely divisions of each film according to the positional relationship, and the packaging material 10 is provided when the packaging bag 70 is manufactured. The methods are not limited by the terms above. For example, the packaging bag 70 may be manufactured using a sheet of packaging material 10 in which the surface film 74, the back film 75, and the bottom film 76 are continuously provided, and the surface film 74 and the bottom film 76 are continuously provided. It may be manufactured using a total of two packaging materials 10 , one packaging material 10 and one backing film 75 , one fronting film 74 , one backing film 75 and one bottom film 76 . may be manufactured using a total of three packaging materials 10.

At least one of the top film 74, the back film 75 and the bottom film 76 is constituted by the packaging material 10 having an adhesive layer containing biomass-derived components. As a result, it is possible to reduce the amount of fossil fuel used compared to the conventional method, thereby reducing the environmental load.

FIG. 12 shows another example of the packaging bag 70 including the packaging material 10. As shown in FIG. The packaging bag 70 shown in FIG. 12 is different only in that it further includes a vapor venting mechanism 80, and other configurations are substantially the same as those of the packaging bag 70 shown in FIG. In the packaging bag 70 shown in FIG. 12, the same parts as those in the packaging bag 70 shown in FIG.

As shown in FIG. 12, the packaging bag 70 includes a steam release mechanism 80 for releasing steam generated when heating the contents housed in the housing portion 77 to the outside. The steam venting mechanism 80 allows the inside and outside of the packaging bag 70 to communicate with each other to release the steam when the pressure of the steam exceeds a predetermined value, and suppresses the steam from escaping from places other than the steam venting mechanism 80. is configured to

In the example shown in FIG. 12 , the steam release mechanism 80 includes a steam release seal portion 81 protruding toward the inside of the packaging bag 70 from the side seal portion 73a, and a non-steam release seal portion 81 isolated from the accommodating portion 77 by the steam release seal portion 81. and a seal portion 82 . The unsealed portion 82 communicates with the outside of the packaging bag 70 . When the pressure of the accommodating portion 77 is increased by being heated by a microwave oven or the like, the vapor release seal portion 81 is peeled off. The steam in the storage portion 77 can escape to the outside of the packaging bag 70 through the peeled portion of the steam releasing seal portion 81 and the unsealed portion 82 .

In addition, the configuration of the vapor release mechanism 80 is not limited to the configuration shown in FIG. 12 . The configuration of the steam release mechanism 80 is arbitrary as long as the storage portion 77 and the outside of the packaging bag 70 can be communicated with each other when the pressure of the steam reaches or exceeds a predetermined value.

In the packaging bag 70 shown in FIG. 12 as well, at least one of the surface film 74, the back film 75 and the bottom film 76 is composed of the packaging material 10 having an adhesive layer containing biomass-derived components. As a result, it is possible to reduce the amount of fossil fuel used compared to the conventional method, thereby reducing the environmental load.

13A and 13B are diagrams showing other examples of the packaging bag 70 including the packaging material 10. FIG. The packaging bag 70 shown in FIG. 13 is different only in that it further includes a spout portion 85, and the rest of the configuration is substantially the same as the packaging bag 70 shown in FIG. In the packaging bag 70 shown in FIG. 13, the same parts as those of the packaging bag 70 shown in FIG.

As shown in FIG. 13, the packaging bag 70 is a portion through which the content passes when the content stored in the storage portion 77 is taken out. In this case, the content is a fluid liquid or the like. The width of the spout portion 85 is narrower than the width of the accommodating portion 77 . Therefore, the user can accurately determine the pouring direction of the contents to be poured out of the packaging bag 70 through the pouring port 85 .

In the example shown in FIG. 13 , the spout portion 85 is configured by parts of the surface film 74 and the back film 75 . For example, spout portion 85 includes spout seal portion 86 that joins face film 74 and back film 75 to define spout portion 85 having a width narrower than housing portion 77 . The packaging bag 70 having such a spout portion 85 is suitably used as a refill pouch that accommodates contents such as detergent, shampoo, and rinse to be refilled into bottles.

Note that the configuration of the outlet portion 85 is not limited to the configuration shown in FIG. 13 as long as the contents can be appropriately poured out. For example, the spout portion 85 may be a member such as a spout that is separate from the surface film 74 and the back surface film 75 .

Also in the packaging bag 70 shown in FIG. 13, at least one of the surface film 74, the back film 75 and the bottom film 76 is composed of the packaging material 10 having an adhesive layer containing a biomass-derived component. As a result, it is possible to reduce the amount of fossil fuel used compared to the conventional method, thereby reducing the environmental load.

FIG. 14 is a diagram showing another example of the packaging bag 70 including the packaging material 10. As shown in FIG. A packaging bag 70 shown in FIG. 14 is a four-sided seal pouch formed by joining a surface film 74 and a back film 75 along the outer edges at four sides. As in the example shown in FIGS. 11 to 13, the upper portion 71 is formed with an upper sealing portion after the contents are accommodated in the packaging bag 70 through the opening 71b.

In the packaging bag 70 shown in FIG. 14 as well, at least one of the surface film 74 and the back film 75 is composed of the packaging material 10 having an adhesive layer containing a biomass-derived component. As a result, it is possible to reduce the amount of fossil fuel used compared to the conventional method, thereby reducing the environmental load.

Although not shown, the packaging bag 70 may be a three-sided seal pouch formed by joining the surface film 74 and the back film 75 along the outer edge at three sides. Moreover, although not shown, the packaging bag 70 may be a pillow pouch that is joined at the upper portion 71, the lower portion 72, and the palm-to-palm portion.

FIG. 15 is a diagram showing an example of a lidded container 90 including the packaging material 10. As shown in FIG. The lidded container 90 includes a container body 92 manufactured by sheet forming such as drawing, and a lid portion 94 joined to the container body 92 .

In the example shown in FIG. 15, for example, the container body 92 is made by drawing a packaging material 10 having an adhesive layer containing biomass-derived components. As a result, it is possible to reduce the amount of fossil fuel used compared to the conventional method, thereby reducing the environmental load.

Moreover, in the example shown in FIG. 15, the lid portion 94 may be formed of the packaging material 10 having an adhesive layer containing a biomass-derived component. As a result, it is possible to reduce the amount of fossil fuel used compared to the conventional method, thereby reducing the environmental load.

FIG. 16 shows an example of a tube 100 with packaging material 10. As shown in FIG. Tube 100 comprises a tube body 102 with wrapping material 10 and a cap 104 attached to tube body 102 .

In the example shown in FIG. 16, the tube main body 102 is produced by processing the packaging material 10 having an adhesive layer containing a biomass-derived component into a tubular shape. As a result, it is possible to reduce the amount of fossil fuel used compared to the conventional method, thereby reducing the environmental load.

EXAMPLES Next, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the description of the Examples below as long as it does not exceed the gist thereof.

[Example 1A]
As the first substrate film 22 of the substrate layer 20, a biaxially stretched polypropylene film (thickness: 20 μm) derived from fossil fuel was prepared. Subsequently, a printed layer 50 was formed on the inner surface side of the polypropylene film using an ink containing a biomass-derived component. In the step of forming the printed layer 50, first, a polyester polyol, which is a reaction product of a polyfunctional alcohol containing a biomass-derived component and a fossil fuel-derived polyfunctional carboxylic acid, was prepared as a main agent. In addition, an isocyanate compound derived from fossil fuel was prepared as a curing agent. Subsequently, a coloring agent was added to a cured product of a polyester polyol containing a biomass-derived component and a fossil fuel-derived isocyanate compound to obtain an ink. Subsequently, the print layer 50 was formed by applying ink in a predetermined pattern to the inner surface of the polypropylene film.

As the second base film 32 of the intermediate layer 30, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel and provided with a metal deposition layer 60 was prepared. Subsequently, the polypropylene film provided with the printed layer 50 and the PET film provided with the vapor deposition layer 60 were laminated by a dry lamination method using the first adhesive layer 26 derived from fossil fuel. In the dry lamination method, a polyester polyol, which is a reaction product of a fossil fuel-derived polyfunctional alcohol and a fossil fuel-derived polyfunctional carboxylic acid, was prepared as a main agent. In addition, an isocyanate compound derived from fossil fuel was prepared as a curing agent. Subsequently, an adhesive having a cured product of a fossil fuel-derived polyester polyol and a fossil fuel-derived isocyanate compound is applied onto the printed layer 50 provided on the first base film 22 and dried to form the first adhesive. An agent layer 26 was obtained. Subsequently, the first base film 22 and the second base film 32 were bonded together with the first adhesive layer 26 on the printed layer 50 interposed therebetween.

As the sealant film 42 of the sealant layer 40, the polyethylene film 1 produced as follows was used. First, 90 parts by mass of linear low-density polyethylene derived from fossil fuel (density: 0.918 g/cm ³ , MFR: 3.8 g/10 min, degree of biomass: 0%) and low-density polyethylene derived from fossil fuel ( Density: 0.924 g/cm ³ , MFR: 2.0 g/10 min, biomass content: 0%) and 10 parts by mass were melt-kneaded to obtain a resin composition. Then, the obtained resin composition was formed into a film by a top-blown air-cooled inflation co-extrusion film-forming machine to obtain a single-layer polyethylene film (biomass degree: 0%) for a sealant layer. The polyethylene film produced in this manner is also referred to as polyethylene film 1 . The thickness of the polyethylene film 1 can be selected within the range of 30 μm or more and 80 μm or less, and is set to 40 μm here. Subsequently, the laminate including the first base film 22 and the second base film 32 and the sealant film 42 are laminated by a dry lamination method using a second adhesive layer 44 containing a biomass-derived component and packaged. Material 10 was obtained. The second adhesive layer 44, like the first adhesive layer 26, has a cured product of a polyfunctional alcohol-containing polyester polyol containing a biomass-derived component and a fossil fuel-derived isocyanate compound.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
OPP20/Biomark/Contact/VMPET12/Contact/PE(1)40
"/" represents the boundary between layers. The layer on the left end is the layer that forms the outer surface of the packaging material 10 , and the layer on the right end is the layer that forms the inner surface of the packaging material 10 .
"OPP" means biaxially oriented polypropylene film derived from fossil fuels. "Biomark" means a printed layer derived from biomass. By "contact" is meant a fossil fuel derived adhesive layer. "VMPET" means biaxially oriented PET film derived from fossil fuels provided with a vapor deposited layer of metal. "PE(1)" means the polyethylene film 1 described above. The number means the layer thickness (unit: μm).

Subsequently, a packaging bag 70 was produced using the packaging material 10 .

[Example 1B]
Packaging in the same manner as in Example 1A, except that a reaction product of a polyfunctional carboxylic acid containing a polyfunctional alcohol derived from a fossil fuel and a biomass-derived component was used as the polyester polyol, which is the main component of the printing layer 50. Material 10 was made.

[Example 1C]
As the polyester polyol, which is the main ingredient of the printing layer 50, a reaction product of a polyfunctional alcohol derived from fossil fuel and a polyfunctional carboxylic acid derived from fossil fuel is used, and as the isocyanate compound, which is the curing agent of the printing layer 50, a biomass-derived component is used. A packaging material 10 was produced in the same manner as in Example 1A, except that the isocyanate compound containing

FIG. 17 collectively shows the layer structure of the packaging materials 10 of Examples 1A to 1C. In the column of "printing layer type" in FIG. 17, the description "ester-based" means that the main agent used in the printing layer is polyester polyol.
In addition, in the column of "biomass-derived components in the printing layer", the description "polyfunctional alcohol" means that at least the polyfunctional alcohol of the main agent among the components of the main agent and the curing agent used in the printing layer is derived from biomass. means Similarly, the description "polyfunctional carboxylic acid" means that at least the polyfunctional carboxylic acid of the main agent among the components of the main agent and curing agent used in the printing layer is derived from biomass. Similarly, the term "isocyanate compound" means that at least the isocyanate compound of the curing agent among the components of the main agent and the curing agent used in the printed layer is derived from biomass. In addition, in the column of "biomass-derived component in adhesive layer", the description "-" means that the adhesive layer does not contain a biomass-derived component.

In Examples 1A to 1C, in the printed layer, one of the three constituents of the polyfunctional alcohol or polyfunctional carboxylic acid used in the main polyester polyol, or the isocyanate compound used in the curing agent was biomass. Although an example of a derived component has been shown, it is not limited to this. For example, two of the three components may contain biomass-derived components, or all three components may contain biomass-derived components.

[Example 1D]
A packaging material 10 was produced in the same manner as in Example 1A, except that polyether polyol was used as the base material of the printed layer 50 . Specifically, a reaction product of a polyfunctional alcohol containing a biomass-derived component and a polyfunctional isocyanate derived from a fossil fuel was used as the main polyether polyol.

[Example 1E]
Packaging in the same manner as in Example 1D, except that a reaction product of a polyfunctional isocyanate containing a polyfunctional alcohol derived from a fossil fuel and a biomass-derived component was used as the polyether polyol that is the main component of the printing layer 50. Material 10 was made.

[Example 1F]
As the polyether polyol, which is the main ingredient of the printing layer 50, a reaction product of a polyfunctional alcohol derived from fossil fuel and a polyfunctional isocyanate derived from fossil fuel is used, and as the isocyanate compound, which is a curing agent of the printing layer 50, a biomass-derived component is used. A packaging material 10 was made in the same manner as in Example 1D, except that the isocyanate compound containing

FIG. 17 collectively shows the layer structure of the packaging materials 10 of Examples 1D to 1F. In the column of "printing layer type" in FIG. 17, the description "ether-based" means that the main agent used in the printing layer is polyether polyol. In addition, in the column of "biomass-derived components in the printing layer", the description "polyfunctional isocyanate" means that at least the polyfunctional isocyanate of the main agent among the components of the main agent and the curing agent used in the printing layer is derived from biomass. means

In Examples 1D to 1F, in the printed layer, one of the three constituents of the polyfunctional alcohol or polyfunctional isocyanate used in the main agent polyether polyol, or the isocyanate compound used in the curing agent was biomass. Although an example of a derived component has been shown, it is not limited to this. For example, two of the three components may contain biomass-derived components, or all three components may contain biomass-derived components.

[Example 1G]
A packaging material 10 was produced in the same manner as in Example 1A, except that the first adhesive layer 26 and the second adhesive layer 44 contained a biomass-derived component. Specifically, polyester polyol, which is a reaction product of a polyfunctional alcohol containing a biomass-derived component and a polyfunctional carboxylic acid derived from fossil fuel, was used as the main agent of the first adhesive layer 26 and the second adhesive layer 44. . As a curing agent for the first adhesive layer 26 and the second adhesive layer 44, an isocyanate compound derived from fossil fuel was used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
OPP20/biomark/biocontact/VMPET12/biocontact/PE(1)40
"Bioadhesive" means a biomass-derived adhesive layer.

[Example 1H]
Except for using a reaction product of a polyfunctional alcohol derived from fossil fuel and a polyfunctional carboxylic acid containing a biomass-derived component as the polyester polyol, which is the main agent of the first adhesive layer 26 and the second adhesive layer 44, Wrapping material 10 was prepared as in Example 1G.

[Example 1I]
As the polyester polyol which is the main agent of the first adhesive layer 26 and the second adhesive layer 44, a reaction product of a fossil fuel-derived polyfunctional alcohol and a fossil fuel-derived polyfunctional carboxylic acid is used, and the first adhesive layer 26 A packaging material 10 was produced in the same manner as in Example 1G, except that an isocyanate compound containing a biomass-derived component was used as the isocyanate compound that is the curing agent of the second adhesive layer 44.

FIG. 17 collectively shows the layer structure of the packaging materials 10 of Examples 1G to 1I. In the column of "type of adhesive layer" in FIG. 17, the description "ester-based" means that the main agent used in the adhesive layer is polyester polyol.
In addition, in the column of "biomass-derived component in the adhesive layer", the description "polyfunctional alcohol" means that at least the polyfunctional alcohol of the main agent among the components of the main agent and the curing agent used in the adhesive layer is biomass-derived. It means that there is Similarly, the description "polyfunctional carboxylic acid" means that at least the polyfunctional carboxylic acid of the main agent among the components of the main agent and curing agent used in the adhesive layer is derived from biomass. Similarly, the term "isocyanate compound" means that at least the isocyanate compound of the curing agent among the components of the main agent and the curing agent used in the adhesive layer is derived from biomass.

In Examples 1G to 1I, in the adhesive layer, one of the three constituents of the polyfunctional alcohol or polyfunctional carboxylic acid used in the main polyester polyol, or the isocyanate compound used in the curing agent, An example of a biomass-derived component has been shown, but the present invention is not limited to this. For example, two of the three components may contain biomass-derived components, or all three components may contain biomass-derived components.

[Example 1J]
A packaging material 10 was produced in the same manner as in Example 1G, except that polyether polyol was used as the main agent of the first adhesive layer 26 and the second adhesive layer 44 . Specifically, as the polyether polyol of the main agent of the first adhesive layer 26 and the second adhesive layer 44, a reaction product of a polyfunctional alcohol containing a biomass-derived component and a polyfunctional isocyanate derived from fossil fuel was used.

[Example 1K]
As the polyether polyol, which is the main agent of the first adhesive layer 26 and the second adhesive layer 44, except that a reaction product of a polyfunctional alcohol derived from fossil fuel and a polyfunctional isocyanate containing a biomass-derived component was used. A packaging material 10 was prepared as in Example 1J.

[Example 1L]
As polyether polyol, which is the main agent of the first adhesive layer 26 and the second adhesive layer 44, a reaction product of a polyfunctional alcohol derived from fossil fuel and a polyfunctional isocyanate derived from fossil fuel is used, and the first adhesive layer 26 A packaging material 10 was produced in the same manner as in Example 1J, except that an isocyanate compound containing a biomass-derived component was used as the isocyanate compound that is the curing agent of the second adhesive layer 44.

FIG. 17 collectively shows the layer structure of the packaging materials 10 of Examples 1J to 1L. In the column of "type of adhesive layer" in FIG. 17, the description "ether-based" means that the main agent used in the adhesive layer is polyether polyol. In addition, in the column of "biomass-derived component in the adhesive layer", the description "polyfunctional isocyanate" means that at least the polyfunctional isocyanate of the main agent among the components of the main agent and the curing agent used in the adhesive layer is biomass-derived. It means that there is

In Examples 1J to 1L, in the adhesive layer, one of the three constituents of the polyfunctional alcohol or polyfunctional isocyanate used in the main polyether polyol, or the isocyanate compound used in the curing agent, An example of a biomass-derived component has been shown, but the present invention is not limited to this. For example, two of the three components may contain biomass-derived components, or all three components may contain biomass-derived components.

Further, in Examples 1G to 1L, both the first adhesive layer 26 and the second adhesive layer 44 showed examples containing biomass-derived components, but are not limited to this, and the first adhesive Only one of layer 26 or second adhesive layer 44 may contain biomass-derived components.

Further, in Examples 1G to 1L, the printed layer shown in Examples 1B to 1F may be used as the printed layer in addition to the printed layer shown in Example 1A.

[Example 1M]
Packaging material 10 was produced in the same manner as in Example 1A, except that polyethylene film 2 produced as described below was used as sealant film 42 of sealant layer 40 .
A method for producing the polyethylene film 2 will be described. First, 60 parts by mass of linear low-density polyethylene derived from fossil fuel (density: 0.918 g/cm ³ , MFR: 3.8 g/10 min, degree of biomass: 0%), low-density polyethylene derived from fossil fuel ( Density: 0.924 g/cm ³ , MFR: 2.0 g/10 min, biomass degree: 0%) and 20 parts by mass of biomass-derived linear low-density polyethylene (LLDPE, manufactured by Braskem, trade name: SLL118, Density: 0.916 g/cm ³ , MFR: 1.0 g/10 min, biomass content: 87%) and 20 parts by mass were melt-kneaded to obtain a resin composition. Next, the obtained resin composition was formed into a film by a top-blown air-cooled inflation co-extrusion film-forming machine to obtain a single-layer polyethylene film 2 (biomass degree: 16%) for a sealant layer. The thickness of the polyethylene film 2 was set to 40 μm as in the case of the polyethylene film 1 of Example 1A.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
OPP20/Biomark/Contact/VMPET12/Contact/PE(2)40
"PE(2)" means the polyethylene film 2 described above.

As the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A.

[Example 1N]
A packaging material 10 was produced in the same manner as in Example 1M, except that the first adhesive layer 26 and the second adhesive layer 44 contained a biomass-derived component. Here, the adhesive layer shown in Example 1G was used as the first adhesive layer 26 and the second adhesive layer 44 .

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
OPP20/Biomark/Biocontact/VMPET12/Biocontact/PE(2)40

As the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Further, as the adhesive layer, the adhesive layer shown in Examples 1H to 1L may be used in addition to the adhesive layer shown in Example 1G.

[Example 1O]
A packaging material 10 was produced in the same manner as in Example 1M, except that a film containing a biomass-derived component was used as the second base film 32 of the intermediate layer 30 . Here, as the second base film 32, a biaxially stretched PET film (12 μm thick) containing a biomass-derived component and provided with a metal deposition layer 60 was used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
OPP20/bio-mark/bio-contact/VM bio-PET12/bio-contact/PE(2)40
"VM bio-PET" means a biomass-derived biaxially oriented PET film provided with a vapor-deposited layer of metal.

As the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Further, as the adhesive layer, the adhesive layer shown in Examples 1H to 1L may be used in addition to the adhesive layer shown in Example 1G.

[Example 2]
In the same manner as in Example 1A, the first base film 22, the printed layer 50, the first adhesive layer 26, the second base film 32, the second adhesive layer 44 and the sealant film 42 were laminated in order. A packaging material 10 was produced. As the first base film 22, a biaxially oriented polypropylene film derived from fossil fuel was used. Although the thickness of the polypropylene film can be selected within the range of 20 μm or more and 40 μm or less, it was set to 20 μm here. As the second base film 32, a fossil fuel-derived biaxially stretched PET film (thickness: 12 μm) provided with a metal deposition layer 60 was used. As the sealant film 42, the polyethylene film 1 described above was used. Although the thickness of the polyethylene film 1 can be selected within the range of 20 μm or more and 70 μm or less, it is set to 20 μm here. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
OPP20/Biomark/Contact/VMPET12/Contact/PE(1)20

Subsequently, a packaging bag 70 was produced using the packaging material 10 .

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the second base film 32 and the sealant film 42 may contain a biomass-derived component.

[Example 3]
In the same manner as in Example 1A, the first base film 22, the printed layer 50, the first adhesive layer 26, the second base film 32, the second adhesive layer 44 and the sealant film 42 were laminated in order. A packaging material 10 was produced. As the first base film 22, a biaxially oriented polypropylene film derived from fossil fuel was used. Although the thickness of the polypropylene film can be selected within the range of 20 μm or more and 40 μm or less, it was set to 25 μm here. As the second base film 32, a fossil fuel-derived biaxially stretched PET film (thickness: 12 μm) provided with a metal deposition layer 60 was used. As the sealant film 42, the polyethylene film 1 described above was used. Although the thickness of the polyethylene film 1 can be selected within the range of 20 μm or more and 70 μm or less, it is set to 50 μm here. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
OPP25/Biomark/Contact/VMPET12/Contact/PE(1)50

Subsequently, using the packaging material 10, a four-sided seal type packaging bag 70 was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the second base film 32 and the sealant film 42 may contain a biomass-derived component.

[Example 4]
In the same manner as in Example 1A, the first base film 22, the printed layer 50, the first adhesive layer 26, the second base film 32, the second adhesive layer 44 and the sealant film 42 were laminated in order. A packaging material 10 was produced. As the first base film 22, a biaxially oriented polypropylene film derived from fossil fuel was used. Although the thickness of the polypropylene film can be selected within the range of 20 μm or more and 40 μm or less, it was set to 30 μm here. As the second base film 32, a fossil fuel-derived biaxially stretched PET film (thickness: 12 μm) provided with a metal deposition layer 60 was used. As the sealant film 42, the polyethylene film 1 described above was used. Although the thickness of the polyethylene film 1 can be selected within the range of 20 μm or more and 70 μm or less, it is set to 30 μm here. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
OPP30/Biomark/Contact/VMPET12 Contact/PE(1)30

Subsequently, using the packaging material 10, a four-sided seal type packaging bag 70 was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the second base film 32 and the sealant film 42 may contain a biomass-derived component.

[Example 5]
The first base film 22, the printed layer 50, the first adhesive layer 26, the metal A packaging material 10 was prepared in which the foil 34, the second adhesive layer 44 and the sealant film 42 were laminated in sequence. As the first base film 22, a biaxially oriented polypropylene film derived from fossil fuel was used. Although the thickness of the polypropylene film can be selected within the range of 20 μm or more and 30 μm or less, it was set to 20 μm here. As the metal foil 34, an aluminum foil (thickness 7 μm) was used. As the sealant film 42, a polypropylene film derived from fossil fuel was used. Although the thickness of the polypropylene film can be selected within the range of 20 μm or more and 30 μm or less, it was set to 30 μm here. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
OPP20/Biomark/Contact/AL foil 7/Contact/CPP30
"AL foil" means aluminum foil. "CPP" means unoriented polypropylene film derived from fossil fuels.

Subsequently, using the packaging material 10, a four-sided seal type packaging bag 70 was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used.

[Example 6A]
The packaging material 10 in which the first base film 22, the printed layer 50, the first adhesive layer 26, the metal foil 34, the second adhesive layer 44 and the sealant film 42 are laminated in this order in the same manner as in Example 5. was made. As the first base film 22, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was used. As the metal foil 34, an aluminum foil (thickness 7 μm) was used. As the sealant film 42, a polypropylene film derived from fossil fuel was used. Although the thickness of the polypropylene film can be selected within the range of 50 μm or more and 80 μm or less, it was set to 70 μm here. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Contact/AL foil 7/Contact/CPP70
"AL foil" means aluminum foil. "CPP" means unoriented polypropylene film derived from fossil fuels.

Subsequently, using the packaging material 10, a packaging bag 70 that can be retorted was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used.

[Example 6B]
A packaging material 10 was produced in the same manner as in Example 6A, except that a biaxially stretched PET film (12 μm thick) containing a biomass-derived component was used as the first base film 22.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
Bio-PET12/Bio-mark/Contact/AL foil 7/Contact/CPP70
"Bio-PET" means biomass-derived biaxially oriented PET film.

Subsequently, using the packaging material 10, a packaging bag 70 that can be retorted was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used.

[Example 7]
The packaging material 10 in which the first base film 22, the printed layer 50, the first adhesive layer 26, the metal foil 34, the second adhesive layer 44 and the sealant film 42 are laminated in this order in the same manner as in Example 5. was made. As the first base film 22, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was used. As the metal foil 34, an aluminum foil (thickness 7 μm) was used. As the sealant film 42, a polypropylene film derived from fossil fuel was used. Although the thickness of the polypropylene film can be selected within the range of 20 μm or more and 50 μm or less, it was set to 40 μm here. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Contact/AL Foil7/Contact/CPP40

Subsequently, using the packaging material 10, a four-sided seal type packaging bag 70 was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22 may contain a biomass-derived component.

[Example 8]
The packaging material 10 in which the first base film 22, the printed layer 50, the first adhesive layer 26, the metal foil 34, the second adhesive layer 44 and the sealant film 42 are laminated in this order in the same manner as in Example 5. was made. As the first base film 22, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was used. As the metal foil 34, an aluminum foil (thickness 6 μm) was used. As the sealant film 42, a polypropylene film derived from fossil fuel was used. Although the thickness of the polypropylene film can be selected within the range of 20 μm or more and 50 μm or less, it was set to 25 μm here. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Contact/AL foil 6/Contact/CPP25

Subsequently, using the packaging material 10, a gusset-type packaging bag 70 was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22 may contain a biomass-derived component.

[Example 9]
In the same manner as in Example 1A, the first base film 22, the printed layer 50, the first adhesive layer 26, the second base film 32, the second adhesive layer 44 and the sealant film 42 were laminated in order. A packaging material 10 was produced. As the first base film 22, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was used. As the second base film 32, a fossil fuel-derived biaxially stretched PET film (thickness: 12 μm) provided with a metal deposition layer 60 was used. As the sealant film 42, the polyethylene film 1 described above was used. Although the thickness of the polyethylene film 1 can be selected within the range of 20 μm or more and 70 μm or less, it is set to 40 μm here. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Contact/VMPET12/Contact/PE(1)40

Subsequently, using the packaging material 10, a three-sided seal type packaging bag 70 was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22, the second base film 32, and the sealant film 42 may contain a biomass-derived component.

[Example 10]
In the same manner as in Example 1A, the first base film 22, the printed layer 50, the first adhesive layer 26, the second base film 32, the second adhesive layer 44 and the sealant film 42 were laminated in order. A packaging material 10 was produced. As the first base film 22, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was used. As the second base film 32, a fossil fuel-derived biaxially stretched PET film (thickness: 12 μm) provided with a metal deposition layer 60 was used. As the sealant film 42, a polypropylene film derived from fossil fuel was used. Although the thickness of the polypropylene film can be selected within the range of 20 μm or more and 70 μm or less, it was set to 40 μm here. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Contact/VMPET12/Contact/CPP40

Subsequently, using the packaging material 10, a self-supporting gusset-type packaging bag 70 provided with a zipper tape was produced.

Note that variations similar to those of Examples 1B to 1Q can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22 and the second base film 32 may contain a biomass-derived component.

[Example 11]
In the same manner as in Example 1A, the first base film 22, the printed layer 50, the first adhesive layer 26, the second base film 32, the second adhesive layer 44 and the sealant film 42 were laminated in order. A packaging material 10 was produced. As the first base film 22, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was used. The second base film 32 is a fossil fuel-derived biaxially stretched PET film (thickness: 12 μm), which includes a vapor deposition layer 60 of inorganic oxide and a gas barrier coating film 62 located on the vapor deposition layer 60. A PET film provided with and was used. As the sealant film 42, a polypropylene film derived from fossil fuel was used. Although the thickness of the polypropylene film can be selected within the range of 50 μm or more and 100 μm or less, it was set to 60 μm here. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Contact/IB-PET12/Contact/CPP60
"IB-PET" means a PET film provided with an inorganic oxide vapor deposition layer and a gas barrier coating film positioned on the vapor deposition layer.

Subsequently, using the packaging material 10, a packaging bag 70 that can be retorted was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22 and the second base film 32 may contain a biomass-derived component.

[Example 12]
In the same manner as in Example 1A, the first base film 22, the printed layer 50, the first adhesive layer 26, the second base film 32, the second adhesive layer 44 and the sealant film 42 were laminated in order. A packaging material 10 was produced. As the first base film 22, a fossil fuel-derived biaxially stretched PET film (thickness: 12 μm) is used. A PET film provided with and was used. As the second base film 32, a biaxially stretched nylon film derived from fossil fuel was used. Although the thickness of the nylon film can be selected within the range of 15 μm or more and 25 μm or less, it was set to 15 μm here. As the sealant film 42, a polypropylene film derived from fossil fuel was used. Although the thickness of the polypropylene film can be selected within the range of 50 μm or more and 100 μm or less, it was set to 60 μm here. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
IB-PET12/Biomark/Contact/ONY15/Contact/CPP60
"/ONY" means nylon film derived from fossil fuels.

Subsequently, using the packaging material 10, a packaging bag 70 that can be retorted was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22 may contain a biomass-derived component.

[Example 13]
A packaging material 10 was produced in the same manner as in Example 12, except that a PET film without the vapor deposition layer 60 and the gas barrier coating film 62 was used as the first base film 22 .

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Contact/ONY15/Contact/CPP60

Subsequently, using the packaging material 10, a packaging bag 70 that can be retorted was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22 may contain a biomass-derived component.

[Example 14]
In the same manner as in Example 1A, the first base film 22, the printed layer 50, the first adhesive layer 26, the second base film 32, the second adhesive layer 44 and the sealant film 42 were laminated in order. A packaging material 10 was produced. As the first base film 22, a fossil fuel-derived biaxially stretched PET film (thickness: 12 μm) is used. A PET film provided with and was used. As the second base film 32, a biaxially stretched nylon film (thickness: 15 μm) derived from fossil fuel was used. As the sealant film 42, the polyethylene film 1 described above was used. Although the thickness of the polyethylene film 1 can be selected within the range of 40 μm or more and 100 μm or less, it was set to 50 μm here. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
IB-PET12/Biomark/Contact/ONY15/Contact/PE(1)50

Subsequently, using the packaging material 10, a packaging bag 70 that can be boiled was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22 and the sealant film 42 may contain a biomass-derived component.

[Example 15]
In the same manner as in Example 1A, the first base film 22, the printed layer 50, the first adhesive layer 26, the second base film 32, the second adhesive layer 44 and the sealant film 42 were laminated in order. A packaging material 10 was produced. As the first base film 22, a fossil fuel-derived biaxially stretched PET film (thickness: 12 μm) is used. A PET film provided with and was used. As the second base film 32, a biaxially stretched nylon film derived from fossil fuel was used. Although the thickness of the nylon film can be selected within the range of 15 μm or more and 25 μm or less, it was set to 15 μm here. As the sealant film 42, the polyethylene film 1 described above was used. Although the thickness of the polyethylene film 1 can be selected within the range of 70 μm or more and 180 μm or less, it is set to 150 μm here. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET/Biomark/Contact/ONY15/Contact/PE(1)150

Subsequently, using the packaging material 10, a packaging bag 70 having a spout portion 85 shown in FIG. 13 was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22 and the sealant film 42 may contain a biomass-derived component.

[Example 16]
The packaging material 10 in which the first base film 22, the printed layer 50, the first adhesive layer 26, the metal foil 34, the second adhesive layer 44 and the sealant film 42 are laminated in this order in the same manner as in Example 5. was made. As the first base film 22, a biaxially stretched nylon film derived from fossil fuel was used. Although the thickness of the nylon film can be selected within the range of 15 μm or more and 25 μm or less, it was set to 15 μm here. As the metal foil 34, an aluminum foil (thickness 7 μm) was used. As the sealant film 42, the polyethylene film 1 described above was used. Although the thickness of the polyethylene film 1 can be selected within the range of 70 μm or more and 180 μm or less, it is set to 110 μm here. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
ONY15/Biomark/Contact/AL foil 7/Contact/PE(1)110

Subsequently, using the packaging material 10, a packaging bag 70 having a spout portion 85 shown in FIG. 13 was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Moreover, the sealant film 42 may contain a biomass-derived component.

[Example 17]
In the same manner as in Example 1A, the first base film 22, the printed layer 50, the first adhesive layer 26, the second base film 32, the second adhesive layer 44 and the sealant film 42 were laminated in order. A packaging material 10 was produced. As the first base film 22, a biaxially stretched nylon film derived from fossil fuel was used. Although the thickness of the nylon film can be selected within the range of 15 μm or more and 25 μm or less, it was set to 15 μm here. As the second base film 32, a fossil fuel-derived biaxially stretched PET film (thickness: 12 μm) provided with a metal deposition layer 60 was used. As the sealant film 42, the polyethylene film 1 described above was used. Although the thickness of the polyethylene film 1 can be selected within the range of 70 μm or more and 180 μm or less, it is set to 110 μm here. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
ONY15/Biomark/Contact/VMPET12/Contact/PE(1)110

Subsequently, using the packaging material 10, a packaging bag 70 having a spout portion 85 shown in FIG. 13 was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the second base film 32 and the sealant film 42 may contain a biomass-derived component.

[Example 18]
In the same manner as in Example 1A, the first base film 22, the printed layer 50, the first adhesive layer 26, the second base film 32, the second adhesive layer 44 and the sealant film 42 were laminated in order. A packaging material 10 was produced. As the first base film 22, a biaxially stretched nylon film derived from fossil fuel was used. Although the thickness of the nylon film can be selected within the range of 15 μm or more and 25 μm or less, it was set to 15 μm here. As the second base film 32, a fossil fuel-derived biaxially stretched PET film (thickness: 12 μm) provided with a metal deposition layer 60 was used. As the sealant film 42, a film having ease of peeling (so-called easy peelability) was used. Specifically, as the sealant film 42, a co-extruded multilayer film including at least a fossil fuel-derived polyethylene layer functioning as a core layer and a blend layer containing polyethylene, polypropylene, etc., and produced by co-extrusion is used. board. The thickness of the entire coextruded multilayer film can be selected within the range of 25 μm or more and 50 μm or less, and was set to 30 μm here. Among them, the thickness of the core layer was 20 μm or more and 28 μm or less. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
ONY15/Biomark/Contact/VMPET12/Contact/PE (Easy Peel) 30
"PE (easy peel)" means a polyethylene film having easy peel properties.

Subsequently, using the packaging material 10, the lid portion 94 of the lidded container 90 shown in FIG. 14 was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the second base film 32 and the sealant film 42 may contain a biomass-derived component. In addition, as the sealant film 42 having easy peel properties, a co-extruded multilayer film including at least a fossil fuel-derived polypropylene layer functioning as a core layer and a blend layer containing polyethylene, polypropylene, etc., and produced by co-extrusion. may be used.

[Example 19]
The position of the printed layer 50 was changed from between the first substrate film 22 and the first adhesive layer 26, as in Example 1A, to between the second substrate film 32 and the second adhesive layer 44. Instead, the first base film 22, the first adhesive layer 26, the second base film 32, the printed layer 50, the second adhesive layer 44 and the sealant film 42 were laminated in order to produce the packaging material 10. . As the first base film 22, the polyethylene film 1 described above was used. Although the thickness of the polyethylene film 1 can be selected within the range of 20 μm or more and 30 μm or less, it is set to 25 μm here. The second base film 32 is a fossil fuel-derived biaxially stretched PET film (thickness: 12 μm), which includes a vapor deposition layer 60 of inorganic oxide and a gas barrier coating film 62 located on the vapor deposition layer 60. A PET film provided with and was used. As the sealant film 42, a polypropylene film derived from fossil fuel was used. Although the thickness of the polypropylene film can be selected within the range of 20 μm or more and 30 μm or less, it was set to 20 μm here. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PE(1)25/Contact/IBPET12/Biomark/Contact/OPP20

Subsequently, using the packaging material 10, a container body 92 of a lidded container 90 shown in FIG. 14 was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22 and the second base film 32 may contain a biomass-derived component.

[Example 20]
In the same manner as in Example 19, the first base film 22, the first adhesive layer 26, the second base film 32, the printed layer 50, the second adhesive layer 44 and the sealant film 42 were laminated in order. A packaging material 10 was produced. As the first base film 22, the polyethylene film 1 described above was used. Although the thickness of the polyethylene film 1 can be selected within the range of 50 μm or more and 200 μm or less, it is set to 150 μm here. The second base film 32 is a fossil fuel-derived biaxially stretched PET film (thickness: 12 μm), which includes a vapor deposition layer 60 of inorganic oxide and a gas barrier coating film 62 located on the vapor deposition layer 60. A PET film provided with and was used. As the sealant film 42, the polyethylene film 1 described above was used. Although the thickness of the polyethylene film 1 can be selected within the range of 50 μm or more and 200 μm or less, it is set to 150 μm here. As the printed layer 50, the first adhesive layer 26 and the second adhesive layer 44, the same ones as in Example 1A were used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PE(1)150/Contact/IBPET12/Biomark/Contact/PE(1)150

Subsequently, using the packaging material 10, the tube main body 102 of the tube 100 shown in FIG. 15 was produced.

Note that variations similar to those of Examples 1B to 1O can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22, the second base film 32, and the sealant film 42 may contain a biomass-derived component.

FIG. 18 summarizes examples of layer configurations of packaging materials 10, types of packaging containers, and contents contained in the packaging containers of Examples 1A, 2-5, 6A, 6B, and 7-20.

[Example 21A]
As the first substrate film 22 of the substrate layer 20, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was prepared. Subsequently, a printed layer 50 was formed on the inner surface of the PET using an ink containing a biomass-derived component. The printed layer 50 has a cured product of a polyfunctional alcohol-containing polyester polyol containing a biomass-derived component and a fossil fuel-derived isocyanate compound, similarly to the printed layer 50 of Example 1A.

As the second base film 32 of the intermediate layer 30, a biaxially oriented nylon film derived from fossil fuel was prepared. Although the thickness of the nylon film can be selected within the range of 15 μm or more and 25 μm or less, it was set to 15 μm here. Subsequently, the PET film provided with the printed layer 50 and the nylon film were bonded together by a dry lamination method using the first adhesive layer 26 derived from fossil fuel. Like the first adhesive layer 26 of Example 1A, the first adhesive layer 26 has a cured product of a main agent containing a fossil fuel-derived polyester polyol and a curing agent containing a fossil fuel-derived isocyanate compound.

As the third base film 36 of the intermediate layer 30, a biaxially oriented PET film (thickness: 12 μm) derived from fossil fuel was prepared. Subsequently, the laminate including the first base film 22 and the second base film 32 and the third base film 36 are laminated by a dry lamination method using the intermediate adhesive layer 38 derived from fossil fuel. A packaging material 10 was obtained. Like the first adhesive layer 26, the intermediate adhesive layer 38 has a cured product of a main agent containing a fossil fuel-derived polyester polyol and a curing agent containing a fossil fuel-derived isocyanate compound.

A fossil fuel-derived polypropylene film was prepared as the sealant film 42 of the sealant layer 40 . Although the thickness of the polypropylene film can be selected within the range of 50 μm or more and 100 μm or less, it was set to 60 μm here. Subsequently, the laminate including the first base film 22, the second base film 32 and the third base film 36 and the sealant film 42 are dry-laminated using the second adhesive layer 44 derived from fossil fuel. A packaging material 10 was obtained by pasting together according to the method. The second adhesive layer 44, like the first adhesive layer 26, has a cured product of a main agent containing a fossil fuel-derived polyester polyol and a curing agent containing a fossil fuel-derived isocyanate compound.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Contact/ONY15/Contact/PET12/Contact/CPP60

Subsequently, using the packaging material 10, a packaging bag 70 that can be retorted was produced.

As the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A.

[Example 21B]
Packaging material 10 was produced in the same manner as in Example 21A, except that first adhesive layer 26, intermediate adhesive layer 38, and second adhesive layer 44 containing biomass-derived components were used. Here, as the first adhesive layer 26, the intermediate adhesive layer 38, and the second adhesive layer 44, adhesion using a cured product of a polyfunctional alcohol-containing polyester polyol containing a biomass-derived component and a fossil fuel-derived isocyanate compound agent layer was used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Biocontact/ONY15/Biocontact/PET12/Biocontact/CPP60

In addition, in Example 21B, an example was shown in which all three adhesive layers, ie, the first adhesive layer 26, the intermediate adhesive layer 38, and the second adhesive layer 44, contained a biomass-derived component, but this is not the only option. will not be One or two of the three adhesive layers, first adhesive layer 26, intermediate adhesive layer 38, and second adhesive layer 44, may contain biomass-derived components. Further, as the adhesive layer, the adhesive layers shown in Examples 1H to 1L may be used in addition to the adhesive layer shown in Example 1G. As the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A.

[Example 21C]
A packaging material 10 was produced in the same manner as in Example 21A, except that a biaxially stretched PET film (12 μm thick) containing a biomass-derived component was used as the first base film 22.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
Bio PET12/Bio Mark/Contact/ONY15/Contact/PET12/Contact/CPP60

As the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A.

[Example 21D]
A packaging material 10 was produced in the same manner as in Example 21A, except that a film containing a biomass-derived component was used as the third base film 36 of the intermediate layer 30 . Here, as the third base film 36, a biaxially stretched PET film (thickness: 12 μm) containing a biomass-derived component was used.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Contact/ONY15/Contact/Bio PET12/Contact/CPP60

As the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A.

[Example 21E]
The packaging material 10 was produced in the same manner as in Example 21A, except that the third base film 36 of the first base film 22, the printed layer 50, and the intermediate layer 30 contained a biomass-derived component. did.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
Bio-PET12/Bio-mark/Bio-contact/ONY15/Bio-contact/Bio-PET12/Bio-contact/CPP60

As the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. In addition to the adhesive layer shown in Example 1I, the adhesive layers shown in Examples 1J to 1N may be used as the adhesive layer.

FIG. 19 summarizes the layer configurations of the packaging materials 10 of Examples 21A-21H.

[Example 22]
In the same manner as in Example 21A, except that the intermediate layer 30 includes a metal foil 34, an intermediate adhesive layer 38, and a second base film 32, which are laminated in order from the outer surface side to the inner surface side. , a packaging material 10 was produced. The packaging material 10 according to this embodiment includes a first base film 22, a printed layer 50, a first adhesive layer 26, a metal foil 34, an intermediate adhesive layer 38, a second base film 32, and a second adhesive layer. 44 and sealant film 42 are provided in sequence. As the first base film 22, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was used. As the metal foil 34, an aluminum foil (thickness 7 μm) was used. As the second base film 32, a biaxially stretched nylon film (thickness: 15 μm) derived from fossil fuel was used. As the sealant film 42, the polyethylene film 1 described above was used. Although the thickness of the polyethylene film 1 can be selected within the range of 40 μm or more and 100 μm or less, it was set to 50 μm here. The printed layer 50, the first adhesive layer 26, the intermediate adhesive layer 38 and the second adhesive layer 44 were the same as in Example 21A.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Contact/AL foil 7/Contact/ONY15/Contact/PE(1)50

Subsequently, using the packaging material 10, a packaging bag 70 that can be boiled was produced.

Note that variations similar to those of Examples 1B to 1O and Examples 21B to 21E can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22 and the sealant film 42 may contain a biomass-derived component.

[Example 23]
In the same manner as in Example 22, the first substrate film 22, the printed layer 50, the first adhesive layer 26, the metal foil 34, the intermediate adhesive layer 38, the second substrate film 32, the second adhesive layer 44 and the sealant film 42 were laminated in order to prepare the packaging material 10 . As the first base film 22, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was used. As the metal foil 34, an aluminum foil (thickness 7 μm) was used. As the second base film 32, a biaxially stretched nylon film derived from fossil fuel was used. Although the thickness of the nylon film can be selected within the range of 15 μm or more and 25 μm or less, it was set to 15 μm here. As the sealant film 42, the polyethylene film 1 described above was used. Although the thickness of the polyethylene film 1 can be selected within the range of 60 μm or more and 100 μm or less, it is set to 70 μm here. The printed layer 50, the first adhesive layer 26, the intermediate adhesive layer 38 and the second adhesive layer 44 were the same as in Example 21A.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Contact/AL foil 7/Contact/ONY15/Contact/PE(1)70

Subsequently, using the packaging material 10, a packaging bag 70 with a spout was produced.

Note that variations similar to those of Examples 1B to 1O and Examples 21B to 21E can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22 and the sealant film 42 may contain a biomass-derived component.

[Example 24]
In the same manner as in Example 22, the first substrate film 22, the printed layer 50, the first adhesive layer 26, the metal foil 34, the intermediate adhesive layer 38, the second substrate film 32, the second adhesive layer 44 and the sealant film 42 were laminated in order to prepare the packaging material 10 . As the first base film 22, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was used. As the metal foil 34, an aluminum foil (thickness 7 μm) was used. As the second base film 32, a biaxially stretched nylon film derived from fossil fuel was used. Although the thickness of the nylon film can be selected within the range of 15 μm or more and 25 μm or less, it was set to 15 μm here. As the sealant film 42, the polyethylene film 1 described above was used. Although the thickness of the polyethylene film 1 can be selected within the range of 70 μm or more and 180 μm or less, it is set to 110 μm here. The printed layer 50, the first adhesive layer 26, the intermediate adhesive layer 38 and the second adhesive layer 44 were the same as in Example 21A.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Contact/AL foil 7/Contact/ONY15/Contact/PE(1)110

Subsequently, using the packaging material 10, a packaging bag 70 having a spout portion 85 shown in FIG. 13 was produced.

Note that variations similar to those of Examples 1B to 1O and Examples 21B to 21E can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22 and the sealant film 42 may contain a biomass-derived component.

[Example 25]
In the same manner as in Example 22, the first substrate film 22, the printed layer 50, the first adhesive layer 26, the metal foil 34, the intermediate adhesive layer 38, the second substrate film 32, the second adhesive layer 44 and the sealant film 42 were laminated in order to prepare the packaging material 10 . As the first base film 22, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was used. As the metal foil 34, an aluminum foil (thickness 7 μm) was used. As the second base film 32, a biaxially stretched nylon film derived from fossil fuel was used. Although the thickness of the nylon film can be selected within the range of 15 μm or more and 25 μm or less, it was set to 15 μm here. As the sealant film 42, a polypropylene film derived from fossil fuel was used. Although the thickness of the polypropylene film can be selected within the range of 50 μm or more and 100 μm or less, it was set to 60 μm here. The printed layer 50, the first adhesive layer 26, the intermediate adhesive layer 38 and the second adhesive layer 44 were the same as in Example 21A.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Contact/AL foil 7/Contact/ONY15/Contact/CPP60

Subsequently, using the packaging material 10, a packaging bag 70 that can be retorted was produced.

Note that variations similar to those of Examples 1B to 1O and Examples 21B to 21E can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22 may contain a biomass-derived component.

[Example 26]
In the same manner as in Example 22, the first substrate film 22, the printed layer 50, the first adhesive layer 26, the metal foil 34, the intermediate adhesive layer 38, the second substrate film 32, the second adhesive layer 44 and the sealant film 42 were laminated in order to prepare the packaging material 10 . As the first base film 22, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was used. As the metal foil 34, an aluminum foil (thickness 7 μm) was used. As the second base film 32, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was used. As the sealant film 42, a polypropylene film derived from fossil fuel was used. Although the thickness of the polypropylene film can be selected within the range of 50 μm or more and 100 μm or less, it was set to 50 μm here. The printed layer 50, the first adhesive layer 26, the intermediate adhesive layer 38 and the second adhesive layer 44 were the same as in Example 21A.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Contact/AL foil 7/Contact/PET12/Contact/CPP50

Subsequently, using the packaging material 10, a packaging bag 70 that can be retorted was produced.

Note that variations similar to those of Examples 1B to 1O and Examples 21B to 21E can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22 and the second base film 32 may contain a biomass-derived component.

[Example 27]
In the same manner as in Example 22, the first substrate film 22, the printed layer 50, the first adhesive layer 26, the metal foil 34, the intermediate adhesive layer 38, the second substrate film 32, the second adhesive layer 44 and the sealant film 42 were laminated in order to prepare the packaging material 10 . As the first base film 22, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was used. As the metal foil 34, an aluminum foil (thickness 6 μm) was used. As the second base film 32, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was used. As the sealant film 42, the polyethylene film 1 described above was used. Although the thickness of the polyethylene film 1 can be selected within the range of 20 μm or more and 70 μm or less, it is set to 50 μm here. The printed layer 50, the first adhesive layer 26, the intermediate adhesive layer 38 and the second adhesive layer 44 were the same as in Example 21A.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Contact/AL foil 6/Contact/PET12/Contact/PE(1)50

Subsequently, using the packaging material 10, a self-supporting gusset-type packaging bag 70 provided with a zipper tape was produced.

Note that variations similar to those of Examples 1B to 1O and Examples 21B to 21E can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22, the second base film 32, and the sealant film 42 may contain a biomass-derived component.

[Example 28]
In the same manner as in Example 22, the first substrate film 22, the printed layer 50, the first adhesive layer 26, the metal foil 34, the intermediate adhesive layer 38, the second substrate film 32, the second adhesive layer 44 and the sealant film 42 were laminated in order to prepare the packaging material 10 . As the first base film 22, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was used. As the metal foil 34, an aluminum foil (thickness 6 μm) was used. As the second base film 32, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was used. As the sealant film 42, the polyethylene film 1 described above was used. Although the thickness of the polyethylene film 1 can be selected within the range of 20 μm or more and 70 μm or less, it is set to 50 μm here. The printed layer 50, the first adhesive layer 26, the intermediate adhesive layer 38 and the second adhesive layer 44 were the same as in Example 21A.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Contact/AL foil 6/Contact/PET12/Contact/PE(1)50

Subsequently, using the packaging material 10, a small packaging bag 70, also called a stick pouch, was produced.

Note that variations similar to those of Examples 1B to 1O and Examples 21B to 21E can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22, the second base film 32, and the sealant film 42 may contain a biomass-derived component.

[Example 29]
In the same manner as in Example 21A, except that the intermediate layer 30 includes the second base film 32, the intermediate adhesive layer 38, and the metal foil 34, which are laminated in order from the outer surface side to the inner surface side. , a packaging material 10 was produced. The packaging material 10 according to this embodiment includes a first base film 22, a printed layer 50, a first adhesive layer 26, a second base film 32, an intermediate adhesive layer 38, a metal foil 34, and a second adhesive layer. 44 and sealant film 42 are provided in sequence. As the first base film 22, a biaxially stretched PET film (thickness: 12 μm) derived from fossil fuel was used. As the second base film 32, a biaxially stretched nylon film derived from fossil fuel was used. Although the thickness of the nylon film can be selected within the range of 15 μm or more and 25 μm or less, it was set to 15 μm here. As the metal foil 34, an aluminum foil (thickness 7 μm) was used. As the sealant film 42, a polypropylene film derived from fossil fuel was used. Although the thickness of the polypropylene film can be selected within the range of 50 μm or more and 100 μm or less, it was set to 60 μm here. The printed layer 50, the first adhesive layer 26, the intermediate adhesive layer 38 and the second adhesive layer 44 were the same as in Example 21A.

The layer structure of the packaging material 10 of this embodiment is expressed as follows.
PET12/Biomark/Contact/ONY15/Contact/AL foil7/Contact/CPP60

Subsequently, using the packaging material 10, a packaging bag 70 that can be retorted was produced.

Note that variations similar to those of Examples 1B to 1O and Examples 21B to 21E can also be employed in this example. For example, as the printed layer, the printed layers shown in Examples 1B to 1F may be used in addition to the printed layer shown in Example 1A. Also, as the adhesive layer, an adhesive layer containing a biomass-derived component such as shown in Examples 1G to 1L may be used. Also, the first base film 22 may contain a biomass-derived component.

FIG. 20 summarizes examples of layer configurations of the packaging materials 10 of Examples 21A and 22-29, types of packaging containers, and contents contained in the packaging containers.

10 packaging material 20 substrate layer 22 first substrate film 26 first adhesive layer 30 intermediate layer 32 second substrate film 34 metal foil 36 third substrate film 38 intermediate adhesive layer 40 sealant layer 42 sealant film 44 second 2 Adhesive layer 50 Printed layer 60 Vapor deposition layer 62 Gas barrier coating film

Claims (9)

A packaging material comprising at least a substrate layer, a printing layer, an adhesive layer, an intermediate layer and a sealant layer,
The adhesive layer is in contact with the intermediate layer,
The printed layer contains a coloring agent and a cured product of a polyol and an isocyanate compound,
The polyol of the printing layer is a polyester polyol of a reaction product of a polyfunctional alcohol and a polyfunctional carboxylic acid,
The packaging material, wherein the polyfunctional alcohol of the printed layer is composed of ethylene glycol, which is a biomass-derived component, and the polyfunctional carboxylic acid of the printed layer is derived from a fossil fuel. 2. The packaging material of Claim 1 , wherein the isocyanate compound of the printed layer comprises a biomass-derived component. 3. The packaging material according to claim 1 or 2 , wherein the base layer has a first base film comprising polyester, polyamide or polyolefin. 4. The packaging material according to claim 3 , wherein the first base film contains a biomass polyester having a biomass-derived ethylene glycol as a diol unit and a fossil fuel-derived dicarboxylic acid as a dicarboxylic acid unit. 5. The packaging material according to any one of claims 1 to 4 , wherein the intermediate layer has at least one of a second base film containing polyester or polyamide as a main component, or a metal foil. The base layer has the second base film,
6. The packaging material according to claim 5 , wherein the second base film contains a biomass polyester having a biomass-derived ethylene glycol as a diol unit and a fossil fuel-derived dicarboxylic acid as a dicarboxylic acid unit. 7. The packaging material according to any one of claims 1 to 6 , wherein the sealant layer comprises polyolefin, which is a polymer of olefin-containing monomers. 8. The packaging material of claim 7 , wherein the sealant layer comprises a biomass polyolefin that is a polymer of biomass-derived ethylene-containing monomers. A packaged product comprising a packaging material according to any one of claims 1-8 .

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