JP2020055179A - Packaging material and packaging product - Google Patents

Abstract

To provide a packaging material with an improved degree of biomass.SOLUTION: A packaging material 20 at least has a surface protective layer 11, a printed layer 12, and a paper substrate layer 13, which are laminated in this order. The printed layer 12 has a colorant, and a urethane (meth) acrylate that is a reactant of a polyol, an isocyanate compound and a hydroxy (meth) acrylate. At least one of the polyol, isocyanate compound or hydroxy (meth) acrylate has a biomass-derived component.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging material containing a biomass-derived component and a packaging product provided with the packaging material.

  2. Description of the Related Art Conventionally, various packaging materials have been developed and proposed as packaging materials for configuring packaging products for filling and packaging various articles such as food and drink, pharmaceuticals, chemicals, cosmetics, sanitary products, daily necessities, and the like. The packaging material is composed of a laminate including at least a base layer and a printed layer for forming a printed pattern.

  In recent years, with the growing demand for the establishment of a recycling-based society, in the field of laminates that constitute packaging materials, as in the field of energy, it has been desired to break away from fossil fuels, and the use of biomass has attracted attention. I have. Biomass is an organic compound that is photosynthesized from carbon dioxide and water, and is a so-called carbon-neutral renewable energy that is converted into carbon dioxide and water again by using it. Recently, biomass plastics using biomass as a raw material have been rapidly commercialized, and attempts have been made to produce various resins from biomass raw materials.

  As a biomass-derived resin, commercial production of polylactic acid (PLA), which is manufactured via lactic acid fermentation, has begun, but its performance as a plastic, including its biodegradability, is the current general-purpose plastic. Therefore, there is a limit in the product use and the method of manufacturing the product, and the product has not been widely used. In addition, a life cycle assessment (LCA) evaluation is performed on the PLA, and the energy consumption at the time of manufacturing the PLA and the equivalence at the time of replacing the general-purpose plastic are discussed.

  Here, as the general-purpose plastic, various types such as polyethylene, polypropylene, polyvinyl chloride, polystyrene, and polyester are used. In particular, polyethylene is formed into films, sheets, bottles, and the like, and is used for various uses such as packaging materials, and is widely used worldwide. Therefore, using polyethylene derived from the conventional fossil fuel has a large environmental load. Therefore, it is desired to reduce the amount of fossil fuel used by using biomass-derived raw materials in the production of polyethylene. For example, to date, it has been studied to produce ethylene and butylene as raw materials for polyolefin resins from renewable natural raw materials (see Patent Document 1). In the field of soft packaging such as pouches, it has been proposed to apply such biomass-derived raw materials to packaging materials (see Patent Document 2).

JP 2011-506628 A JP 2018-51788 A

  Also in the field of packaging materials for paper containers including a paper base layer, it is desired to reduce the amount of fossil fuel used by using biomass-derived raw materials.

  The present invention has been made in view of such a point, and an object of the present invention is to provide a packaging material for a paper container with an increased degree of biomass.

  The present invention is a packaging material in which at least a surface protective layer, a printing layer, and a paper base layer are sequentially laminated, wherein the printing layer comprises a reaction between a colorant, a polyol, an isocyanate compound, and hydroxy (meth) acrylate. A urethane (meth) acrylate that is a product, and wherein at least one of the polyol, the isocyanate compound, or the hydroxy (meth) acrylate contains a biomass-derived component.

  In the packaging material according to the present invention, the polyol may include a biomass-derived component.

  In the packaging material according to the present invention, the isocyanate compound may include a biomass-derived component.

  In the packaging material according to the present invention, the surface protective layer may include urethane (meth) acrylate, which is a reaction product of a polyol, an isocyanate compound, and hydroxy (meth) acrylate.

  In the packaging material according to the present invention, at least one of the polyol, the isocyanate compound, or the hydroxy (meth) acrylate of the surface protective layer may include a biomass-derived component.

  The present invention is a packaged product provided with the packaging material described above.

  ADVANTAGE OF THE INVENTION According to this invention, the biomass degree of the packaging material containing a paper base material layer can be raised.

It is a sectional view showing an example of the packaging material by a 1st embodiment of the present invention. It is a sectional view showing an example of the packaging material by a 1st embodiment of the present invention. It is a sectional view showing an example of the packaging material by a 1st embodiment of the present invention. It is a figure showing an example of a packaging container provided with packaging material by a 1st embodiment of the present invention. It is a figure which expands and shows the packaging container shown in FIG. It is a figure showing an example of a packaging container provided with packaging material by a 1st embodiment of the present invention. It is sectional drawing which shows an example of the packaging material by 2nd Embodiment of this invention. It is sectional drawing which shows an example of the packaging material by 2nd Embodiment of this invention. It is sectional drawing which shows an example of the packaging material by 2nd Embodiment of this invention. It is sectional drawing which shows an example of the packaging material by 2nd Embodiment of this invention. It is a figure showing an example of a packaging container provided with packaging material by a 2nd embodiment of the present invention. It is sectional drawing which shows an example of the packaging material by 3rd Embodiment of this invention. It is sectional drawing which shows an example of the packaging material by 3rd Embodiment of this invention. It is a figure showing an example of a packaging container provided with packaging material by a 3rd embodiment of the present invention. FIG. 15 is a plan view illustrating an example of a blank plate for producing the packaging container illustrated in FIG. 14. It is a figure which shows the layer constitution of the packaging material of Examples 1A-1H. It is a figure which shows the layer constitution of the packaging material of Example 1I-1P. It is a figure which shows the layer structure of the packaging material of Example 1 and 2A-10.

  The laminate constituting the packaging material according to the present invention includes at least a surface protective layer, a print layer, and a paper base layer that are sequentially laminated from the outer surface side to the inner surface side. The inner surface is a surface located on the side of the content accommodated in the packaging product in the packaging product formed from the packaging material. The outer surface is a surface located on the opposite side of the inner surface. In the present application, the term “order” in descriptions such as “provide in this order” and “laminated in order” indicates the order in the direction from the outer surface side to the inner surface side, unless otherwise specified.

  In the present invention, the biomass degree described below is preferably 40% or more, more preferably 80% or more and less than 100%, in the entire laminate constituting the packaging material. When the biomass degree is in the above range, the amount of fossil fuel used can be reduced, and the environmental load can be reduced.

First Embodiment FIG. 1 is a sectional view showing an example of a packaging material 20 according to a first embodiment of the present invention. The packaging material 20 includes a surface protection layer 11, a printing layer 12, and a paper base layer 13 in this order. The surface protection layer 11 forms the outer surface 20y of the packaging material 20, and the paper base layer 13 forms the inner surface 20x of the packaging material 20.

  FIG. 2 is a cross-sectional view illustrating another example of the packaging material 20 according to the first embodiment of the present invention. The packaging material 20 includes at least a surface protection layer 11, a printing layer 12, a paper base material layer 13, and a sealant layer 22 in this order. The surface protection layer 11 forms the outer surface 20y of the packaging material 20, and the sealant layer 22 forms the inner surface 20x of the packaging material 20.

  FIG. 3 is a sectional view showing another example of the packaging material 20 according to the first embodiment of the present invention. The packaging material 20 includes at least a surface protection layer 11, a printing layer 12, a paper base layer 13, an adhesive resin layer 24, a metal foil 23, an adhesive resin layer 25, and a sealant layer 22 in this order. . The surface protection layer 11 forms the outer surface 20y of the packaging material 20, and the sealant layer 22 forms the inner surface 20x of the packaging material 20.

  In addition, it is also possible to appropriately combine a plurality of layer configurations of the packaging material 20 shown in FIGS. 1 to 3 described above.

  Hereinafter, each layer constituting the packaging material 20 will be described.

(Paper base layer)
The paper base material layer 13 is a layer containing paper. The paper base layer 13 has a basis weight of 100 g / m ² or more and 700 g / m ² or less, preferably 150 g / m ² or more and 600 g / m ² or less, more preferably 200 g / m ² or more and 500 g / m ² or less. The paper substrate layer 13 is intended for white paperboard in general, but it is particularly preferable to use ivory paper, milk carton base paper, cup base paper, etc. using natural pulp from the viewpoint of safety.

  The paperboard may use neutral rosin, alkyl ketene dimer, or alkenyl succinic anhydride as a sizing agent, or cationic polyacrylamide or cationic starch as a fixing agent. It is also possible to use a sulfuric acid band to make paper in a neutral region of pH 6 or more and pH 9 or less. In addition, if necessary, in addition to the above-mentioned sizing agent, other than the fixing agent, various fillers for papermaking, a retention enhancer, a dry paper strength enhancer, a wet paper strength enhancer, a binder, a dispersant, a flocculant, a plasticizer. Agents and adhesives may be appropriately contained.

(Print layer)
The printing layer 12 is a layer formed by printing to display decoration, display of contents, display of a best-before period, display of a manufacturer, a seller, and the like, and display and beauty. The printing layer 12 includes, for example, a picture layer that forms a desired arbitrary picture such as a picture, a photograph, a character, a number, a figure, a symbol, and a pattern. The printing layer may further include a ground color layer formed by printing so as to make the picture of the picture layer stand out.

  In the present embodiment, the print layer 12 is formed by UV offset printing. The printing layer 12 contains a coloring agent and a binder resin. The ink composition for forming the print layer 12 contains a solvent suitable for UV offset printing in addition to the colorant and the binder resin.

(Coloring agent)
The colorant is not particularly limited, and conventionally known pigments and dyes can be used.

(Binder resin)
The binder resin contains a biomass-derived component. For example, the binder resin contains urethane (meth) acrylate which is a reaction product of a polyol, an isocyanate compound and hydroxy (meth) acrylate, and the polyol, isocyanate compound or hydroxy (meth) acrylate contains a biomass-derived component. In the following description, urethane (meth) acrylate containing a biomass-derived component is also referred to as biourethane (meth) acrylate.

  Urethane (meth) acrylate is obtained, for example, by reacting polyol and isocyanate with hydroxy (meth) acrylate. In the biourethane (meth) acrylate, a plant-derived polyol can be used as the polyol, a plant-derived isocyanate can be used as the isocyanate, or a plant-derived polyol can be used for both the polyol and the isocyanate.

  As the polyol, a polyester polyol which is a reactant of a polyfunctional alcohol and a polyfunctional carboxylic acid, a polyether polyol which is a reactant of a polyfunctional alcohol and a polyfunctional isocyanate, or a reactant of a polyfunctional alcohol and a carbonate Certain polycarbonate polyols can be used. Hereinafter, each polyol will be described.

<Polyester polyol>
When the polyester polyol contains a biomass-derived component, at least one of the polyfunctional alcohol and the polyfunctional carboxylic acid contains a biomass-derived component. The following examples can be given as polyester polyols containing biomass-derived components.
・ Reacted product of polyfunctional alcohol derived from biomass and polyfunctional carboxylic acid derived from biomass ・ Reacted product of polyfunctional alcohol derived from fossil fuel and polyfunctional carboxylic acid derived from biomass ・ Polyfunctional alcohol derived from biomass and derived from fossil fuel With polyfunctional carboxylic acid

  As the polyfunctional alcohol derived from biomass, an aliphatic polyfunctional alcohol obtained from a plant material such as corn, sugar cane, cassava, and sago palm can be used. Examples of the aliphatic polyfunctional alcohols derived from biomass include, for example, polypropylene glycol (PPG), neopentyl glycol (NPG), ethylene glycol (EG), diethylene glycol (DEG), and butylene obtained from plant raw materials by the following method. 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-hydroxypropyl aldehyde (HPA) by a fermentation method in which glucose is obtained by decomposing plant materials. Compared with polypropylene glycol produced by the EO production method, polypropylene glycol produced by a bio-method such as the above fermentation method can provide useful by-products such as lactic acid from the viewpoint of safety, and can also keep production costs low. It is also preferred that it is possible.
Butylene glycol derived from biomass can be produced by producing succinic acid by producing and fermenting glycol from plant raw materials and hydrogenating it.
Biomass-derived ethylene glycol can be produced, for example, from bioethanol obtained by a conventional method via ethylene.

  As the polyfunctional alcohol derived from fossil fuel, a compound having two or more, preferably 2 to 8 hydroxyl groups in one molecule can be used. Specifically, as the polyfunctional alcohol derived from fossil fuel, there is no particular limitation, and conventionally known ones 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 polyol, polycarbonate polyol, polyolefin polyol, acrylic polyol and the like can be used. These may be used alone or in combination of two or more.

  Biomass-derived polyfunctional carboxylic acids include recyclable plant-derived oils such as soybean oil, linseed oil, tung oil, coconut oil, palm oil, castor oil, and waste edible oil mainly composed of them. An aliphatic polyfunctional carboxylic acid obtained from a plant material such as oil can be used. Examples of the aliphatic polyfunctional carboxylic acid derived from biomass include sebacic acid, succinic acid, phthalic acid, adipic acid, glutaric acid, dimer acid and the like. For example, sebacic acid is produced as a by-product of heptyl alcohol by subjecting ricinoleic acid obtained from castor oil to alkaline pyrolysis. In the present invention, it is particularly preferable to use succinic acid derived from biomass or sebacic acid derived from biomass. These may be used alone or in combination of two or more.

  As the polyfunctional carboxylic acid derived from the fossil fuel, an aliphatic polyfunctional carboxylic acid or an aromatic polyfunctional carboxylic acid can be used. As the aliphatic polyfunctional carboxylic acid derived from fossil fuel, there is no particular limitation, and conventionally known ones can be used. Examples thereof include adipic acid, dodecane diacid, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, and maleic anhydride. Acids, itaconic anhydride, sebacic acid, succinic acid, glutaric acid, and dimer acid, and ester compounds thereof. The aromatic polyfunctional carboxylic acid derived from fossil fuel is not particularly limited, and conventionally known ones can be used.For example, isophthalic acid, terephthalic acid, naphthalenedicarboxylic acid, phthalic anhydride, trimellitic acid, And pyromellitic acid, and ester compounds thereof. 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 a biomass-derived component. The following examples can be given as polyether polyols containing components derived from biomass.
・ Reacted product of polyfunctional alcohol derived from biomass and polyfunctional isocyanate derived from biomass ・ Reacted product of polyfunctional alcohol derived from fossil fuel and polyfunctional isocyanate derived from biomass ・ Multifunctional alcohol derived from biomass and polyfunctional isocyanate Reactant with functional isocyanate

  As the polyfunctional alcohol derived from biomass and the polyfunctional alcohol derived from fossil fuel, the polyfunctional alcohol derived from biomass and the polyfunctional alcohol derived from fossil fuel described in the above 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. The obtained one can be used. The biomass-derived polyfunctional isocyanate is, for example, a biomass-derived diisocyanate. Examples of the biomass-derived diisocyanate include dimer acid diisocyanate (DDI), octamethylene diisocyanate, and decamethylene diisocyanate. Alternatively, a plant-derived diisocyanate can 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 subjecting a carboxyl group of lysine to methyl esterification and then converting an amino group to an isocyanate group. In addition, 1,5-pentamethylene diisocyanate is obtained by decarboxylating a carboxyl group of lysine and then converting an amino group to an isocyanate group.

  Other methods for synthesizing 1,5-pentamethylene diisocyanate include a phosgenation method and a carbamate method. More specifically, the phosgenation method is a method in which 1,5-pentamethylenediamine or a salt thereof is directly reacted with phosgene or a method in which pentamethylenediamine hydrochloride is suspended in an inert solvent and reacted with phosgene. According to the method, 1,5-pentamethylene diisocyanate is synthesized. In the carbamate method, 1,5-pentamethylene diisocyanate or a salt thereof is first carbamate to produce pentamethylene dicarbamate (PDC), and then thermally decomposed to give 1,5-pentamethylene diisocyanate. It is to be synthesized. In the present invention, as a polyisocyanate suitably used, 1,5-pentamethylene diisocyanate-based polyisocyanate (trade name: Stabio (registered trademark)) manufactured by Mitsui Chemicals, Inc. may be mentioned.

  The polyfunctional isocyanate derived from fossil fuel is not particularly limited, and conventionally known ones can be used. For example, toluene-2,4-diisocyanate, 4-methoxy-1,3-phenylene diisocyanate, 4-isopropyl-isocyanate 1,3-phenylene diisocyanate, 4-chloro-1,3-phenylene diisocyanate, 4-butoxy-1,3-phenylene diisocyanate, 2,4-diisocyanate diphenyl ether, 4,4′-methylenebis (phenylene isocyanate) (MDI), Julilylene diisocyanate, tolidine diisocyanate, xylylene diisocyanate (XDI), 1,5-naphthalene diisocyanate, benzidine diisocyanate, o-nitrobenzidine diisocyanate, 4,4'-diisocyanate diisocyanate Aromatic diisocyanate such as Njiru the like. 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-methylene bis (cyclohexyl isocyanate) ), 1,5-tetrahydronaphthalenediisocyanate, isophorone diisocyanate, alicyclic diisocyanates such as hydrogenated MDI and hydrogenated XDI. These may be used alone or in combination of two or more.

<Polycarbonate polyol>
When the polycarbonate polyol contains a biomass-derived component, a reaction product of a polyfunctional alcohol containing a biomass-derived component and a carbonate derived from a fossil fuel can be used as the polycarbonate polyol. Examples of the carbonate include dimethyl carbonate, dipropyl carbonate, diethyl carbonate, diethylene carbonate, dibutyl carbonate, ethylene carbonate, diphenyl carbonate and the like. These can be used alone or in combination of two or more.

  As the polyfunctional alcohol derived from biomass, the polyfunctional alcohol derived from biomass described in the above polyester polyol can be used.

<Isocyanate compound>
Next, the isocyanate compound will be described. As the isocyanate compound containing a biomass-derived component, the polyfunctional isocyanate derived from biomass described for the polyether polyol can be used.

<Hydroxy (meth) acrylate>
Next, the hydroxy (meth) acrylate will be described. Examples of the hydroxy (meth) acrylate include (meth) acryloyl groups such as hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, and 2-hydroxy-3-phenoxypropyl (meth) acrylate. Hydroxy (meth) acrylates such as glycerin di (meth) acrylate, pentaerythritol tri (meth) acrylate, ditrimethylolpropane tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, sorbitol penta (meth) acrylate, etc. Hydroxy (meth) acrylate having two or more (meth) acryloyl groups is exemplified. These may be used alone or in combination of two or more.

The printing layer 12 has a biomass degree of preferably 5% or more, more preferably 5% or more and 50% or less, and still more preferably 10% or more and 50% or less. When the biomass degree is in 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 12 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. 2} or less. The printing layer 12 has a thickness of preferably 0.1 μm or more and 10 μm or less, more preferably 0.5 μm or more and 5 μm or less, and still more preferably 0.7 μm or more and 3 μm or less. Note that a plurality of printing layers 12 having such weight and thickness may be provided.

  The “degree of biomass” is, for example, a value obtained by measuring the content of carbon derived from biomass by measuring radioactive carbon (C14).

When the value obtained by measuring the content of carbon derived from biomass by radioactive carbon (C14) measurement is indicated as "biomass degree", the "biomass degree" can be obtained as follows. That is, since carbon dioxide in the atmosphere contains C14 at a constant rate (105.5 pMC), plants that take in carbon dioxide in the atmosphere and grow, for example, corn, also have a C14 content of about 105.5 pMC. It is known that It is also known that C14 is hardly contained in fossil fuels. Therefore, by measuring the ratio of C14 contained in all the carbon atoms in the polyester, the ratio of carbon derived from biomass can be calculated. When the content of C14 in the print layer 12 is defined as _PC14 , the content P _bio of carbon derived from biomass can be determined as follows.
P _bio (%) = P _C14 /105.5×100

  Further, the “degree of biomass” may be a weight ratio of a biomass-derived component. Hereinafter, unless otherwise specified, the “degree of biomass” indicates a weight ratio of a biomass-derived component.

(Surface protection layer)
The surface protection layer 11 is a layer that protects the printing layer 12. The surface protection layer 11 may be provided so as to be in contact with the printing layer 12. The surface protective layer 11 is formed by applying a paint containing a solid content and a solvent. As the solid content of the paint, the same material as the binder resin of the print layer 12 can be used. Therefore, the configuration of the surface protective layer 11 is the same as the configuration of the print layer 12 except that the surface protective layer 11 does not include a coloring agent.

  For example, the surface protective layer 11 contains urethane (meth) acrylate which is a reaction product of a polyol, an isocyanate compound, and hydroxy (meth) acrylate. As the polyol, the isocyanate compound and the hydroxy (meth) acrylate, the polyol, the isocyanate compound and the hydroxy (meth) acrylate described in the printing layer 12 can be used. Preferably, the urethane (meth) acrylate of the surface protective layer 11 contains a biomass-derived component. For example, at least one of a polyol, an isocyanate compound, and a hydroxy (meth) acrylate in the urethane (meth) acrylate of the surface protective layer 11 contains a biomass-derived component.

The surface protective layer 11 has a biomass degree of preferably 5% or more, more preferably 5% or more and 50% or less, and still more preferably 10% or more and 50% or less. When the biomass degree is in the above range, the amount of fossil fuel used can be reduced, and the environmental load can be reduced. The weight of the surface protective layer 11 after drying is preferably from 0.1 g / m ^{2 to} 10 g / m ² , more preferably from 1 g / m ^{2 to} 5 g / m ² , and still more preferably from 1 g / m ^{2 to} 3 g / m ^2. m ² or less. The surface protective layer 11 has a thickness of preferably 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.

(Sealant layer)
The sealant layer 22 may include a biomass-derived component, or may not include a biomass-derived component. When the sealant layer 22 is formed from a material containing a biomass-derived component, the sealant layer 22 can be formed using the following biomass polyolefin. In the case where the sealant layer 22 is formed of a material containing no biomass-derived component, the sealant layer 22 can be formed using a conventionally known thermoplastic resin derived from fossil fuel.

  Biomass polyolefin is a polymer of a monomer containing an olefin such as ethylene derived from biomass. Since an olefin derived from biomass is used as a monomer as a raw material, a polyolefin polymerized is derived from biomass. In addition, the raw material monomer of polyolefin does not need to contain 100 mass% of olefins derived from biomass.

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

  The biomass-derived fermented ethanol refers to ethanol purified by contacting a culture solution containing a carbon source obtained from a plant material with a microorganism-derived microorganism or a product derived from a crushed product thereof, producing the ethanol, and then purifying the ethanol. For purification of ethanol from the culture solution, conventionally known methods such as distillation, membrane separation, and extraction can be applied. For example, a method of adding benzene, cyclohexane or the like and causing azeotropic distillation, or removing water by membrane separation or the like can be mentioned.

  The monomer which is a raw material of the biomass polyolefin may further include a monomer of ethylene derived from fossil fuel and / or a monomer of α-olefin derived from fossil fuel, and may further include a monomer of α-olefin derived from biomass.

  The α-olefin is not particularly limited in the number of carbon atoms, but usually one having 3 to 20 carbon atoms can be used, and is preferably butylene, hexene, or octene. This is because butylene, hexene, or octene can be produced by polymerizing ethylene, which is a raw material derived from biomass. In addition, by containing such an α-olefin, the polymerized polyolefin has an alkyl group as a branched structure, and therefore can be more flexible than a simple linear one.

  As the biomass polyolefin, polyethylene or a copolymer of ethylene and an α-olefin may be used alone or in combination of two or more. In particular, the biomass polyolefin is preferably polyethylene. This is because by using ethylene, which is a biomass-derived raw material, it is theoretically possible to produce a biomass-derived component.

  The biomass polyolefin may include two or more biomass polyolefins having different biomass degrees, and the biomass degree of the entire polyolefin resin layer may be within the range described below.

Biomass polyolefin, preferably 0.91 g / cm ³ or more 0.93 g / cm ³ or less, more preferably 0.912 g / cm ³ or more 0.928 g / cm ³ or less, more preferably 0.915 g / cm ³ or more 0 It has a density of 0.925 g / cm ³ or less. The density of the biomass polyolefin is a value measured according to the method specified in Method A of JIS K7112-1980 after performing annealing described in JIS K6760-1995. When the density of the biomass polyolefin is 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 a packaged product. In addition, when 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 increased, and it can be suitably used as an inner layer of a packaged product.

  The biomass polyolefin has a melt flow of from 0.1 g / 10 min to 10 g / 10 min, preferably from 0.2 g / 10 min to 9 g / 10 min, more preferably from 1 g / 10 min to 8.5 g / 10 min. It has a rate (MFR). The melt flow rate is a value measured by the method A at a temperature of 190 ° C. and a load of 21.18 N in a method specified in JIS K7210-1995. If the MFR of the biomass polyolefin is 0.1 g / 10 min or more, the extrusion load during molding can be reduced. When 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.

Suitable biomass polyolefins include biomass-derived low-density polyethylene (trade name: SBC818, density: 0.918 g / cm ³ , MFR: 8.1 g / 10 min, biomass degree 95%) manufactured by Braskem. Biomass-derived low-density polyethylene manufactured by Braskem (trade name: SPB681, density: 0.922 g / cm ³ , MFR: 3.8 g / 10 minutes, biomass degree 95%), biomass-derived linear chain manufactured by Braskem Low-density polyethylene (trade name: SLL118, density: 0.916 g / cm ³ , MFR: 1.0 g / 10 minutes, biomass degree 87%) and the like.

  As the thermoplastic resin derived from the fossil fuel, for example, low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, high-density polyethylene, polypropylene, propylene-ethylene copolymer, ethylene-vinyl acetate copolymer, Examples include an ethylene-acrylic acid copolymer, an ethylene-methacrylic acid copolymer, an ethylene-methyl acrylate copolymer, an ethylene-ethyl acrylate copolymer, an ethylene-methyl methacrylate copolymer, and an ionomer.

  The sealant layer 22 preferably has a biomass degree of 5% or more, more preferably 10% or more and 95% or less. When the biomass degree is in the above range, the amount of fossil fuel used can be reduced, and the environmental load can be reduced.

  The sealant layer 22 may be a single layer or a multilayer. When the biomass polyolefin as described above is used for the sealant layer, it may be a sealant layer including three layers of an inner layer, an intermediate layer, and an outer layer. In that case, the intermediate layer may be a layer composed of biomass polyolefin or a layer composed of a mixture of biomass polyolefin and a conventionally known polyolefin derived from a fossil fuel, and the inner layer and the outer layer may be a conventionally known polyolefin derived from a fossil fuel. preferable.

  The sealant layer 22 preferably has a thickness of 10 μm or more and 300 μm or less, more preferably 20 μm or more and 200 μm or less, and still more preferably 30 μm or more and 150 μm or less.

(Metal foil)
The metal foil 23 is a member obtained by rolling metal. As the metal foil 23, a conventionally known metal foil can be used. Aluminum foil is preferred from the viewpoint of gas barrier properties that prevent the transmission of oxygen gas and water vapor and the like, and light shielding properties that prevent the transmission of visible light and ultraviolet light.

(Adhesive resin layer)
The adhesive resin layer is a layer provided when any two layers are bonded. The adhesive resin layer 24 is a layer for bonding the paper base material layer 13 and the metal foil 23, and the adhesive resin layer 25 is a layer for bonding the metal foil 23 and the sealant layer 22.

  The adhesive resin layer can be formed by a conventionally known method, for example, a melt extrusion lamination method or a sand lamination method. Examples of the thermoplastic resin that can be used for the adhesive resin layer include a polyethylene resin, a polypropylene resin, or a cyclic polyolefin resin, or a copolymer resin, a modified resin, or a mixture (including alloys) containing these resins as a main component. ) Can be used. Examples of the polyolefin resin include low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), linear (linear) low-density polyethylene (LLDPE), polypropylene (PP), and metallocene catalyst. Ethylene-α-olefin copolymer, ethylene-polypropylene random or block copolymer, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA), ethylene Ethyl acrylate copolymer (EEA), ethylene-methacrylic acid copolymer (EMAA), ethylene-methyl methacrylate copolymer (EMMA), ethylene / maleic acid copolymer, ionomer resin, interlayer adhesion To improve the above-mentioned polyolefin resin , It can be used acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, and an acid-modified polyolefin resin modified with an unsaturated carboxylic acid such as itaconic acid. In addition, a resin obtained by graft-polymerizing or copolymerizing an unsaturated carboxylic acid, an unsaturated carboxylic anhydride, or an ester monomer with the polyolefin resin can be used. These materials can be used alone or in combination of two or more. As the cyclic polyolefin-based resin, for example, cyclic polyolefins such as ethylene-propylene copolymer, polymethylpentene, polybutene, and polynorbonene can be used. These resins can be used alone or in combination of two or more. In addition, as the above-mentioned polyethylene resin, a resin using the above-mentioned ethylene derived from biomass as a monomer unit can be used to further improve the degree of biomass.

  When laminating the adhesive resin layer by the melt extrusion lamination method, an anchor coat layer formed by applying an anchor coat agent and drying it may be provided on the surface of the layer to be laminated. Examples of the anchor coating agent include any resin having a heat-resistant temperature of 135 ° C. or higher, such as a vinyl-modified resin, an epoxy resin, a urethane resin, a polyester resin, and a polyethylene imine. An anchor coating agent which is a cured product of a polyacrylic or polymethacrylic resin (polyol) having two or more hydroxyl groups and an isocyanate compound as a curing agent can be preferably used. Further, a silane coupling agent may be used as an additive thereto, and nitrified cotton may be used in combination to increase heat resistance.

  The dried anchor coat layer has a thickness of 0.1 μm or more and 1 μm or less, preferably 0.3 μm or more and 0.5 μm or less. The adhesive resin layer after drying has a thickness of 1 μm or more and 10 μm or less, preferably 2 μm or more and 5 μm or less. The adhesive resin layer preferably has a thickness of 5 μm or more and 50 μm or less, preferably 10 μm or more and 30 μm or less.

(Production method of packaging material)
Next, an example of a method for manufacturing a laminate constituting the packaging material 20 will be described.

  First, the above-mentioned paper base material layer 13 is prepared. Subsequently, the above-described ink composition is applied to the paper base layer 13 by offset printing, and the ink composition on the paper base layer 13 is irradiated with ultraviolet rays to form the print layer 12 on the paper base layer 13. Form. Subsequently, the above-described paint containing a solid content and a solvent is applied on the print layer 12, and the paint on the print layer 12 is irradiated with ultraviolet rays to form the surface protective layer 11 on the print layer 12. Thereby, the packaging material 20 including the surface protection layer 11, the printing layer 12, and the paper base material layer 13 can be obtained. As a method of applying the paint, an offset method or the like can be used.

<Packaging products>
An example of a packaged product formed by using the packaging material 20 will be described. FIG. 4 is a view showing a heat insulating container 50 having heat insulating properties. The left half and the right half of FIG. 4 show a cross-sectional view and a front view of the heat insulating container 50, respectively. 4 includes a paper cup main body 51 and an outer cylinder 52 that covers the body of the paper cup main body 51. The outer cylinder 52 has a hollow cylindrical shape whose upper and lower parts are open. The outer cylinder 52 is an example of a packaged product 20A formed by using the packaging material 20 shown in FIG. The paper cup body 51 and the outer cylinder 52 are partially joined by an adhesive 53.

  FIG. 5 is an enlarged view showing the heat insulating container 50. As shown in FIG. 5, a gap 54 is formed between the body of the paper cup body 51 and the outer cylinder 52. Due to the space 54, it is possible to prevent the heat of the contents stored in the paper cup body 51 from being transmitted to the outer cylinder 52. Examples of the contents include ramen, miso soup, soup and the like.

  FIG. 6 is a perspective view in which a part of the paper cup 55 is cut away. The paper cup 55 includes a main body 56 having a body 57 and a flange 58, and a bottom 59. The main body 56 is an example of a packaged product 20A formed by using the packaging material 20 shown in FIG. 2 or FIG. Examples of the contents stored in the paper cup 55 include confectionery, ice cream, jelly, and a paper cup of a vending machine.

  By configuring the packaged product 20A using the packaging material 20 including the printed layer 12 containing the biomass-derived component, it is possible to reduce the amount of fossil fuel used compared to the related art. Thereby, environmental load can be reduced.

Second Embodiment Next, a second embodiment of the present invention will be described. In the second embodiment, the same portions as those in the above-described first embodiment are denoted by the same reference numerals, and detailed description is omitted. Further, when it is clear that the operation and effect obtained in the first embodiment can also be obtained in this embodiment, the description thereof may be omitted.

  FIG. 7 is a sectional view showing an example of the packaging material 30 according to the second embodiment of the present invention. The packaging material 30 includes a surface protection layer 11, a printing layer 12, and a paper base layer 13, which are sequentially stacked, and a surface layer 14 located on the surface protection layer 11. In the example shown in FIG. 7, the surface layer 14 is partially located on the surface protective layer 11. The surface layer 14 is, for example, a layer formed by foil stamping. In this case, the surface layer 14 includes at least an adhesive layer, a metal film, and a release layer in this order from the surface protective layer 11 side. Although not shown, the surface layer 14 may also be formed on the surface protective layer 11 of the packaging material shown in other than FIG.

  FIG. 8 is a sectional view showing another example of the packaging material 30 according to the second embodiment of the present invention. The packaging material 30 includes a surface protection layer 11, a printing layer 12, a paper base layer 13, and a cardboard layer 31 in this order. The surface protection layer 11 forms the outer surface 30y of the packaging material 30, and the cardboard layer 31 forms the inner surface 30x of the packaging material 30.

  FIG. 9 is a sectional view showing another example of the packaging material 30 according to the second embodiment of the present invention. The packaging material 30 includes a surface protection layer 11, a printing layer 12, a paper base layer 13, an adhesive layer 33, and a vapor deposition film 32 in this order. The surface protection layer 11 forms the outer surface 30y of the packaging material 30, and the vapor deposition film 32 forms the inner surface 30x of the packaging material 30.

  FIG. 10 is a sectional view showing another example of the packaging material 30 according to the second embodiment of the present invention. The packaging material 30 includes a surface protection layer 11, a printing layer 12, a paper base layer 13, an adhesive resin layer 34, and a vapor deposition film 32 in this order. The surface protection layer 11 forms the outer surface 30y of the packaging material 30, and the vapor deposition film 32 forms the inner surface 30x of the packaging material 30.

  Hereinafter, each layer constituting the packaging material 30 will be described.

(Surface protection layer, printing layer, paper base layer)
As the surface protective layer 11, the print layer 12, and the paper base layer 13, the surface protective layer 11, the print layer 12, and the paper base layer 13 described in the first embodiment can be used.

(Cardboard layer)
The corrugated cardboard layer 31 is a layer having corrugated corrugated paper (flute) and a cover sheet and a back paper bonded to the flute, and is a so-called corrugated cardboard. The cardboard layer 31 is bonded to the paper base layer 13. As the corrugated cardboard layer 31, a G stage having a G flute having a step height of about 0.5 mm, an F stage having an F flute having a floor height of about 0.6 mm, or the like can be used.

(Evaporated film)
The deposition film 32 includes a base material and a deposition film deposited on the base material. The deposited film is located on the outer surface side of the base material.

  The substrate is a plastic film. Various plastics such as polyethylene, polypropylene, polyvinyl chloride, polystyrene, and polyester can be used as the material of the plastic film. The base material may include a biomass-derived component or may not include a biomass-derived component.

  When the substrate contains a biomass-derived component, the substrate can be formed using the following biomass polyester or biomass polyethylene.

  The biomass polyester has ethylene glycol derived from biomass as a diol unit and dicarboxylic acid derived from a fossil fuel as a dicarboxylic acid unit. The base material may further include, in addition to the biomass polyester, a fossil fuel-derived polyester having fossil fuel-derived ethylene glycol as a diol unit and a fossil fuel-derived dicarboxylic acid as a dicarboxylic acid unit.

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

  Ethylene glycol derived from biomass is derived from ethanol produced from biomass (biomass ethanol). For example, biomass-derived ethylene glycol can be obtained from biomass ethanol by a conventionally known method, for example, by producing ethylene glycol via ethylene oxide. Further, commercially available biomass ethylene glycol may be used. For example, biomass ethylene glycol commercially available from Indiaglycol Co., Ltd. can be suitably used.

  As the dicarboxylic acid unit of the biomass polyester, a dicarboxylic acid derived from a fossil fuel is used. As the dicarboxylic acid, aromatic dicarboxylic acids, aliphatic dicarboxylic acids, and derivatives thereof can be used without limitation. Examples of the aromatic dicarboxylic acid include terephthalic acid and isophthalic acid, and examples of the derivative of the aromatic dicarboxylic acid include lower alkyl esters of the aromatic dicarboxylic acid, specifically, methyl ester, ethyl ester, propyl ester and butyl. Esters and the like. Of these, terephthalic acid is preferred, and dimethyl terephthalate is preferred as the derivative of the aromatic dicarboxylic acid.

  As the aliphatic dicarboxylic acid, specifically, oxalic acid, succinic acid, glutaric acid, adipic acid, sebacic acid, dodecane diacid, dimer acid, cyclohexanedicarboxylic acid, and the like, usually have 2 to 40 carbon atoms. And a linear or alicyclic dicarboxylic acid. Further, as the derivative of the aliphatic dicarboxylic acid, a lower alkyl ester such as a methyl ester, an ethyl ester, a propyl ester and a butyl ester of the aliphatic dicarboxylic acid or a cyclic acid anhydride of the aliphatic dicarboxylic acid such as succinic anhydride is mentioned. No. Among these, adipic acid, succinic acid, dimer acid or a mixture thereof is preferable, and those containing succinic acid as a main component are particularly preferable. As the derivative of the aliphatic dicarboxylic acid, a methyl ester of adipic acid and succinic acid, or a mixture thereof is more preferable. These dicarboxylic acids can be used alone or in combination of two or more.

  The biomass polyester may be a copolymer polyester obtained by adding a copolymer component as a third component in addition to the diol component and the dicarboxylic acid component. Specific examples of the copolymer component include a bifunctional oxycarboxylic acid, a trifunctional or higher polyhydric alcohol for forming a crosslinked structure, a trifunctional or higher polycarboxylic acid and / or an anhydride thereof, and a trifunctional carboxylic acid. At least one kind of polyfunctional compound selected from the group consisting of functional or higher oxycarboxylic acids is exemplified. Among these copolymer components, copolymerized polyesters having a high degree of polymerization tend to be easily produced, and therefore oxycarboxylic acids having a bifunctionality and / or a trifunctionality or more are particularly preferably used. Among them, the use of tri- or higher functional oxycarboxylic acids is most preferable because a polyester having a high degree of polymerization can be easily produced in a very small amount without using a chain extender described later.

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

  Using a resin composition of biomass polyester or a resin composition containing biomass polyester and a polyester derived from fossil fuel, the base material can be formed by, for example, forming a film by a T-die method. Specifically, after drying the above-described resin composition, the resin composition is supplied to a melt extruder heated to a temperature of not less than the melting point Tm of the resin composition to a temperature of Tm + 70 ° C. to melt the resin composition. A substrate can be formed by extruding a sheet from a die such as a T-die, and rapidly solidifying the extruded sheet by 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 according to the purpose.

  Biomass polyethylene is a monomer polymer containing ethylene derived from biomass. As the biomass-derived ethylene, the biomass-derived ethylene described in the sealant layer 22 of the first embodiment can be used.

  When the substrate is formed of a material containing no biomass-derived component, as a plastic film constituting the substrate, for example, a polyester film such as a polyethylene terephthalate film or a polybutylene terephthalate film, a polyolefin film such as a polyethylene film or a polypropylene film, Alternatively, a plastic film such as a polypropylene / ethylene-vinyl alcohol copolymer co-stretched co-stretched film or a composite film in which two or more of these films are laminated can be used.

  As the deposition film, for example, a deposition film of a metal such as aluminum (Al) and lead (Pb) can be used.

(Adhesive layer)
The adhesive layer is a layer provided when two arbitrary layers are bonded. The adhesive layer 33 in FIG. 9 is a layer for bonding the paper base layer 13 and the vapor deposition film 32. The adhesive layer 33 includes a cured product of a polyol and an isocyanate compound.

  The adhesive layer 33 may include a biomass-derived component. In the adhesive layer 33 containing the biomass-derived component, at least one of the polyol and the isocyanate compound contains the biomass-derived component.

  In the adhesive layer, as the isocyanate compound containing a biomass-derived component, the same isocyanate compound containing a biomass-derived component as in the above-described printing layer 12 can be used. In addition, in the adhesive layer, as the polyol containing the biomass-derived component, the same polyol as that of the print layer 12 can be used. When both the printed layer 12 and the adhesive layer are formed using a cured product containing a biomass-derived component, the cured product in the printed layer 12 and the cured product in the adhesive layer may have the same composition or may have different compositions. The composition may be used.

  The adhesive layer 33 has a biomass degree of preferably 5% or more, more preferably 5% or more and 50% or less, and still more preferably 30% or more and 50% or less. When the biomass degree is in 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 33 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, and even more preferably 2 g / m ² or more and 5 g / m ^2. m ² or less.

  The adhesive layer 33 has a thickness of preferably 0.1 μm or more and 10 μm or less, more preferably 1 μm or more and 6 μm or less, and still more preferably 2 μm or more and 5 μm or less.

(Adhesive resin layer)
The adhesive resin layer is a layer provided when any two layers are bonded. The adhesive resin layer 34 in FIG. 10 is a layer that bonds the paper base layer 13 and the vapor deposition film 32. As the adhesive resin layer 34, the adhesive resin layer described in the first embodiment can be used. When the adhesive resin layer 34 contains a polyethylene resin, a material using ethylene derived from biomass as a monomer unit may be used.

(Production method of packaging material)
Next, an example of a method for manufacturing a laminate forming the packaging material 30 will be described.

  An example of a method for manufacturing the packaging material 30 shown in FIG. 9 will be described. First, a paper base layer 13 on which the above-described printing layer 12 and surface protection layer 11 are formed, and a vapor deposition film 32 are prepared. Subsequently, the paper base layer 13 and the vapor-deposited film 32 are laminated via the adhesive layer 33 by a dry lamination method.

  In the dry lamination method, first, an adhesive composition is applied to one of two films to be laminated. Subsequently, the applied adhesive composition is dried to evaporate the solvent. Thereafter, the two films are laminated via the dried adhesive composition. Subsequently, aging is performed for at least 24 hours in an environment of, for example, 20 ° C. or more while the two laminated films are wound up.

  After the paper base layer 13 and the vapor deposition film 32 are laminated via the adhesive layer 33, the print layer 12 and the surface protection layer 11 may be formed on the paper base layer 13.

  Next, an example of a method for manufacturing the packaging material 30 shown in FIG. 10 will be described. First, a paper base layer 13 on which the above-described printing layer 12 and surface protection layer 11 are formed, and a vapor deposition film 32 are prepared. Subsequently, the paper base layer 13 and the vapor deposition film 32 are laminated via the adhesive resin layer 34 by a sand lamination method.

  In the sand lamination method, first, a molten resin constituting the adhesive resin layer 34 is extruded onto one of the two films to be laminated. Subsequently, the other film is laminated on the resin extruded into one film.

  After laminating the paper base layer 13 and the vapor deposition film 32 via the adhesive resin layer 34, the print layer 12 and the surface protection layer 11 may be formed on the paper base layer 13.

<Packaging products>
An example of a packaged product formed by using the packaging material 30 will be described. FIG. 11 is an example of a packaged product 30 </ b> A formed by using the packaging material 30 shown in any of FIGS. 7 to 10. The packaged product 30A is a general paper container such as an outer box for sweets, a paper box for bottles, and an outer box for medicines.

  By configuring the packaged product 30A using the packaging material 30 including the printed layer 12 containing the biomass-derived component, it is possible to reduce the amount of fossil fuel used compared to the related art. Thereby, environmental load can be reduced.

Third Embodiment Next, a third embodiment of the present invention will be described. In the third embodiment, the same parts as those in the above-described first embodiment are denoted by the same reference numerals, and detailed description is omitted. Further, when it is clear that the operation and effect obtained in the first embodiment can also be obtained in this embodiment, the description thereof may be omitted.

  FIG. 12 is a sectional view showing an example of the packaging material 40 according to the third embodiment of the present invention. The packaging material 40 includes a surface protection layer 11, a printing layer 12, a paper base layer 13, and an inner resin layer 41 in this order. The surface protection layer 11 forms the outer surface 40y of the packaging material 40, and the inner resin layer 41 forms the inner surface 40x of the packaging material 40.

  FIG. 13 is a cross-sectional view illustrating another example of the packaging material 40 according to the third embodiment of the present invention. The packaging material 40 includes a surface protection layer 11, a printing layer 12, a paper base layer 13, an adhesive layer 42, and an inner resin layer 41 in this order. The surface protection layer 11 forms the outer surface 40y of the packaging material 40, and the inner resin layer 41 forms the inner surface 40x of the packaging material 40.

  Hereinafter, each layer constituting the packaging material 40 will be described.

(Surface protection layer, printing layer, paper base layer)
As the surface protective layer 11, the print layer 12, and the paper base layer 13, the surface protective layer 11, the print layer 12, and the paper base layer 13 described in the first embodiment can be used.

(Inner resin layer)
Examples of the resin contained in the inner resin layer 41 include polyethylene, polyolefin such as polypropylene and polymethylpentene, polyester such as polyethylene terephthalate and polybutylene terephthalate, polyvinyl chloride, and polystyrene. The inner resin layer 41 may be a layer formed on the paper base material layer 13 by extrusion, or may be a film bonded to the paper base material layer 13 via an adhesive layer 42. When the inner resin layer 41 is formed by extrusion, the thickness of the inner resin layer 41 is, for example, not less than 20 μm and not more than 60 μm. When the inner resin layer 41 is a film bonded to the paper base material layer 13, the thickness of the inner resin layer 41 is, for example, 7 μm or more and 50 μm or less.

  The inner resin layer 41 may include a biomass-derived component or may not include a biomass-derived component. When the inner resin layer 41 contains a biomass-derived component, the inner resin layer 41 can be formed using, for example, the biomass polyester or the biomass polyethylene described in the base material of the vapor deposition film 32 of the second embodiment.

(Adhesive layer)
The adhesive layer 42 is a layer that bonds the paper base layer 13 and the inner resin layer 41 when the inner resin layer 41 is in the form of a film. The adhesive layer 42 may include a cured product of a polyol and an isocyanate compound, similarly to the adhesive layer 33 of the second embodiment.

  The adhesive layer 42 may include a biomass-derived component. In the adhesive layer 42 containing the biomass-derived component, at least one of the polyol and the isocyanate compound contains the biomass-derived component. As the polyol containing the biomass-derived component and the isocyanate compound containing the biomass-derived component, the polyol and the isocyanate compound described in the printing layer 12 can be used.

(Production method of packaging material)
Next, an example of a method for manufacturing a laminate forming the packaging material 40 will be described.

  An example of a method for manufacturing the packaging material 40 shown in FIG. 12 will be described. First, a paper base material layer 13 on which the above-described printing layer 12 and surface protection layer 11 are formed is prepared. Subsequently, the resin in a molten state is extruded onto the paper base material layer 13 by a melt extrusion lamination method to form the inner resin layer 41.

  After the inner resin layer 41 is formed on the paper base layer 13, the print layer 12 and the surface protection layer 11 may be formed on the paper base layer 13.

  An example of a method for manufacturing the packaging material 40 shown in FIG. 13 will be described. First, a film constituting the paper base material layer 13 on which the above-described printing layer 12 and surface protection layer 11 are formed, and the inner resin layer 41 are prepared. Subsequently, the paper base layer 13 and the film of the inner resin layer 41 are laminated via the adhesive layer 42 by a dry lamination method.

  After laminating the paper base layer 13 and the film of the inner resin layer 41 via the adhesive layer 42, the print layer 12 and the surface protection layer 11 may be formed on the paper base layer 13.

<Packaging products>
An example of a packaged product formed by using the packaging material 40 will be described. FIG. 14 is an example of a packaged product 40A formed by using the packaging material 40 shown in FIG. 12 or FIG. The packaged product 40A is, for example, a tray that stores contents such as primary-wrapped food. When the primary-packaged food is heated in a microwave oven, it may be taken out of the primary packaging container and stored in a tray made of the packaged product 40A. In this case, the contents are in contact with the inner surface 40x of the packaging material 40 constituting the packaging product 40A.

  FIG. 15 is a plan view showing a blank for producing the packaging product 40A shown in FIG. In the blank, a front side plate 2, a rear side plate 3, a left side plate 4, and a right side plate 5 are respectively provided continuously along folding lines a to d on the front and rear and right and left sides of the rectangular bottom plate 1, and the respective side plates 2 to 5 are provided. , Triangular fold pieces 2a to 5a are respectively connected to both sides via fold lines e, and adjacent fold pieces are connected to each other via a fold line f of radiation extending outward from a corner of the bottom plate. Thus, a web corner W is formed.

  The rear plate 3 is provided with a lid plate 6 on its upper side via a fold line g, and the front plate 2 is provided with a flap 7 on its upper side via a fold line h. Is provided with a locking piece 6a protruding at the center of the front end via a fold line i, and a cut α for inserting the locking piece 6a is provided at the center of a fold line h connecting the flap 7 continuously. . The folding line i of the locking piece 6a has a cut β for facilitating bending, and cutouts 6b are formed on both left and right sides of the cover plate 6.

  The left side plate 4 and the right side plate 5 are respectively provided with handle plates 8, 9 on the upper side thereof via a folding line j, and the handle plates 8, 9 are formed with a folding line k for folding in two. Further, locking inserts 8a, 9a are protrudingly provided at the tips of the handle plates 8, 9 via folding lines l, respectively. In this example, V-shaped notches are formed at the bases of the insertion pieces 8a and 9a, and these insertion pieces 8a and 9a engage with the notches 6b on both right and left sides of the cover plate 6 when used. It is supposed to.

  Further, in this blank, three vertical pressing rules are formed in the middle of the front side plate 2 and the rear side plate 3 to prevent bending. The fold lines a to l may be basically formed by pressing, but the fold line g of the cover plate 6, the fold line h of the flap 7, the fold line j of the handle plates 8, 9 and the handle plate Regarding the fold line k for folding the halves 8 and 9 and the fold line 1 of the insertion pieces 8a and 9a, 1) in the middle of the creasing, in consideration of the easiness to bend the fold lines when designing the blank. A so-called lead rule with a cut, 2) a perforation with a large pitch, 3) a perforation with a small pitch, etc. may be adopted as appropriate.

  In order to assemble the blank of FIG. 15, first, the side plates 2 to 5 are erected with respect to the bottom plate 1, and at the same time, the folding pieces 2 a to 5 a are pulled out and folded to form a web corner portion W. The web corner W is folded and attached to the outside of the left side plate 4 and the right side plate 5 to form a box shape as shown in FIG. When the blank is assembled in this manner, the upper opening is slightly curved outward and spreads due to the repulsive force against the bending of the paperboard.

  By configuring the packaged product 40A using the packaging material 40 including the printed layer 12 containing the biomass-derived component, it is possible to reduce the amount of fossil fuel used compared to the related art. Thereby, environmental load can be reduced.

  Next, the present invention will be described more specifically with reference to examples, but the present invention is not limited to the description of the following examples unless it exceeds the gist.

[Example 1A]
Ivory paper having a basis weight of 260 g / m ² was prepared as the paper base layer 13. Subsequently, the printing layer 12 was formed on the paper base layer 13. In the step of forming the print layer 12, first, an ink composition containing a colorant, a binder resin, and a solvent was prepared. As the binder resin, biourethane (meth) acrylate, which is a reaction product of a polyester polyol containing a biomass-derived component, an isocyanate compound derived from a fossil fuel, and a hydroxy (meth) acrylate derived from a fossil fuel, was used. As the polyester polyol containing a biomass-derived component, a polyester polyol which is a reaction product of a polyfunctional alcohol containing a biomass-derived component and a polyfunctional carboxylic acid derived from a fossil fuel was used. Subsequently, the ink composition is applied to the paper base layer 13 in a predetermined pattern by offset printing, and the ink composition on the paper base layer 13 is irradiated with ultraviolet rays to form a print layer on the paper base layer 13. No. 12 was formed. The thickness of the printing layer 12 was 1 μm.

  Subsequently, the surface protection layer 11 was formed on the printing layer 12. In the step of forming the surface protective layer 11, first, a paint containing a binder resin and a solvent was prepared. As a binder resin, urethane (meth) acrylate, which is a reaction product of a fossil fuel-derived polyester polyol, a fossil fuel-derived isocyanate compound, and a fossil fuel-derived hydroxy (meth) acrylate, was used. Subsequently, a paint was applied to the entire area of the print layer 12 by an offset method, and the paint on the print layer 12 was irradiated with ultraviolet rays to form the surface protective layer 11. The thickness of the surface protective layer 11 was 1 μm. Thus, the packaging material 20 having the layer configuration shown in FIG. 1 was produced.

The layer configuration of the packaging material 20 of this embodiment is expressed as follows.
Table / Biomark / Paper “/” indicates the boundary between layers. The leftmost layer is a layer constituting the outer surface of the packaging material, and the rightmost layer is a layer constituting the inner surface of the packaging material.
"Table" means the surface protective layer. “Biomark” means a printed layer derived from biomass. "Paper" means a paper substrate layer. "Adhesive resin" means an adhesive resin layer derived from fossil fuel. "AL foil" means aluminum foil. “PE (1)” means a polyethylene film derived from fossil fuel. The number means the thickness of the layer (unit: μm).

  Subsequently, the outer cylinder 52 of the heat insulating container 50 shown in FIG. The heat insulating container 50 can accommodate, for example, instant noodles and soup.

[Example 1B]
Packaging was performed in the same manner as in Example 1A, except that a reaction product of a polyfunctional alcohol derived from fossil fuel and a polyfunctional carboxylic acid containing a biomass-derived component was used as the polyester polyol of the binder resin of the printing layer 12. Material 20 was produced.

[Example 1C]
Bio-urethane (meth) acrylate, which is a reaction product of a fossil fuel-derived polyester polyol, an isocyanate compound containing a biomass-derived component, and a fossil fuel-derived hydroxy (meth) acrylate, is used as the binder resin of the printing layer 12. Except for the above, a packaging material 20 was produced in the same manner as in Example 1A.

FIG. 16A shows the layer configuration and the like of the packaging material 20 of Examples 1A to 1C. In the column of “biomass-derived component in print layer” in FIG. 16A, the description “binder resin” means that the binder resin used in the print layer contains a biomass-derived component.
In the column of "Biomass-derived component in binder resin of printing layer", the description "polyol" means that the polyol used in the binder resin of the printing layer contains a biomass-derived component. Further, the description “isocyanate compound” means that the isocyanate compound used in the binder resin of the printing layer contains a biomass-derived component.
Further, in the column of "type of polyol for printing layer", description of "ester type" means that the polyol used in the binder resin of the printing layer is a polyester polyol.
Further, in the column of “biomass-derived components in the polyol of the printing layer”, the description “polyfunctional alcohol” means that among the components used in the polyol of the binder resin of the printing layer, at least the polyfunctional alcohol of the polyester polyol is derived from biomass. Means that Similarly, the description “polyfunctional carboxylic acid” means that among the components used in the polyol of the binder resin of the printing layer, at least the polyfunctional carboxylic acid of the polyester polyol is derived from biomass. The description "-" means that the polyol of the binder resin of the printing layer does not contain a biomass-derived component.

  In Examples 1A to 1C, in the binder resin of the printing layer, one of the three constituent elements of the polyfunctional alcohol or polyfunctional carboxylic acid used in the polyester polyol or the isocyanate compound is a biomass-derived component. Although an example is shown, the present invention is not limited to this. For example, two of the three components may include a biomass-derived component, and all three components may include a biomass-derived component.

[Example 1D]
A packaging material 20 was produced in the same manner as in Example 1A, except that polyether polyol was used as the polyol of the binder resin of the printing layer 12. 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 polyether polyol.

[Example 1E]
Packaging was performed in the same manner as in Example 1D, except that a reaction product of a polyfunctional alcohol derived from a fossil fuel and a polyfunctional isocyanate containing a biomass-derived component was used as the polyether polyol of the binder resin of the print layer 12. Material 20 was produced.

[Example 1F]
As a binder resin of the printing layer 12, biourethane (meth) acrylate, which is a reaction product of a fossil fuel-derived polyether polyol, an isocyanate compound containing a biomass-derived component, and a fossil fuel-derived hydroxy (meth) acrylate, was used. Except for this, the packaging material 20 was produced in the same manner as in Example 1D.

  FIG. 16A shows the layer structure of the packaging material 20 of Examples 1D to 1F. In the column of “type of polyol of printing layer” in FIG. 16A, the description “ether type” means that the polyol used in the binder resin of the printing layer is a polyether polyol. In the column of "biomass-derived component in polyol of printing layer", description of "polyfunctional isocyanate" means that at least polyfunctional isocyanate among components used in polyol of binder resin of printing layer is derived from biomass. Means

  In Examples 1D to 1F, in the binder resin of the printing layer, one of the three constituent elements of the polyfunctional polyol or the polyfunctional isocyanate used in the polyether polyol or the isocyanate compound is a biomass-derived component. Although an example is shown, the present invention is not limited to this. For example, two of the three components may include a biomass-derived component, and all three components may include a biomass-derived component.

[Example 1G]
A packaging material 20 was prepared in the same manner as in Example 1A, except that polycarbonate polyol was used as the polyol of the binder resin of the print layer 12. Specifically, a reaction product of a polyfunctional alcohol containing a biomass-derived component and a carbonate derived from a fossil fuel was used as the polycarbonate polyol.

[Example 1H]
Bio urethane (meth) acrylate, which is a reaction product of a fossil fuel-derived polycarbonate polyol, an isocyanate compound containing a biomass-derived component, and a fossil fuel-derived hydroxy (meth) acrylate, was used as the binder resin of the print layer 12. Except for the above, a packaging material 20 was produced in the same manner as in Example 1G.

  FIG. 16A shows the layer structure of the packaging material 20 of Examples 1G and 1H. In the column of “type of polyol for print layer” in FIG. 16A, the description “carbonate-based” means that the polyol used in the binder resin of the print layer is a polycarbonate polyol.

  In Examples 1G and 1H, in the binder resin of the printing layer, an example is shown in which one of the two components, that is, the polyfunctional alcohol used for the polycarbonate polyol or the isocyanate compound is a biomass-derived component. However, it is not limited to this. For example, both of the two components may include a biomass-derived component.

[Example 1I]
A packaging material 20 was produced in the same manner as in Example 1A, except that a material containing a biomass-derived component was used as the surface protective layer 11. Specifically, as a binder resin of the surface protective layer 11, bio-urethane (meta) which is a reaction product of a polyester polyol containing a biomass-derived component, an isocyanate compound derived from a fossil fuel, and a hydroxy (meth) acrylate derived from a fossil fuel is used. ) An acrylate was used. As the polyester polyol containing a biomass-derived component, a polyester polyol which is a reaction product of a polyfunctional alcohol containing a biomass-derived component and a polyfunctional carboxylic acid derived from a fossil fuel was used.

The layer configuration of the packaging material 20 of this embodiment is expressed as follows.
Bio Table / Bio Mark / Paper “Bio Table” means a surface protective layer derived from biomass.

[Example 1J]
Except for using a reaction product of a polyfunctional alcohol derived from a fossil fuel and a polyfunctional carboxylic acid containing a biomass-derived component as the polyester polyol of the binder resin of the surface protective layer 11, in the same manner as in Example 1I, A packaging material 20 was produced.

[Example 1K]
As a binder resin for the surface protective layer 11, biourethane (meth) acrylate, which is a reaction product of a fossil fuel-derived polyester polyol, an isocyanate compound containing a biomass-derived component, and a fossil fuel-derived hydroxy (meth) acrylate, was used. Except for this, the packaging material 20 was produced in the same manner as in Example 1I.

FIG. 16B shows the layer configuration of the packaging material 20 of Examples 1I to 1K. In the column of “biomass-derived component in surface protective layer” in FIG. 16B, the description “binder resin” means that the binder resin used in the surface protective layer contains a biomass-derived component.
In the column of "Biomass-derived component in binder resin of surface protective layer", the description "polyol" means that the polyol used in the binder resin of the surface protective layer contains a biomass-derived component. Further, the description “isocyanate compound” means that the isocyanate compound used in the binder resin of the surface protective layer contains a biomass-derived component.
Further, in the column of "Type of polyol for surface protective layer", the description "ester type" means that the polyol used in the binder resin of the surface protective layer is a polyester polyol.
In the column of “Biomass-derived component in polyol of surface protective layer”, description of “polyfunctional alcohol” means that at least polyfunctional alcohol of polyester polyol among components used in polyol of binder resin of surface protective layer is used. It means that it is derived from biomass. Similarly, the description “polyfunctional carboxylic acid” means that among the components used in the polyol of the binder resin of the surface protective layer, at least the polyfunctional carboxylic acid of the polyester polyol is derived from biomass. The description "-" means that the polyol of the binder resin of the surface protective layer contains no biomass-derived component.

  In Examples 1I to 1K, in the binder resin of the surface protective layer, one of the three constituent elements of the polyfunctional alcohol or polyfunctional carboxylic acid used in the polyester polyol or the isocyanate compound was a biomass-derived component. An example is given, but is not limited to this. For example, two of the three components may include a biomass-derived component, and all three components may include a biomass-derived component.

[Example 1L]
A packaging material 20 was produced in the same manner as in Example 1I, except that polyether polyol was used as the polyol for the binder resin of the surface protective layer 11. 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 polyether polyol.

[Example 1M]
Except for using a reaction product of a polyfunctional alcohol derived from fossil fuel and a polyfunctional isocyanate containing a biomass-derived component as the polyether polyol of the binder resin of the surface protective layer 11, in the same manner as in Example 1L, A packaging material 20 was produced.

[Example 1N]
As a binder resin for the surface protection layer 11, bio urethane (meth) acrylate, which is a reaction product of a fossil fuel-derived polyether polyol, an isocyanate compound containing a biomass-derived component, and a fossil fuel-derived hydroxy (meth) acrylate, is used. A packaging material 20 was produced in the same manner as in Example 1L, except that the packaging material 20 was used.

  FIG. 16B shows the layer configuration and the like of the packaging material 20 of Examples 1L to 1N. In the column of “Type of polyol for surface protective layer” in FIG. 16B, the description “ether type” means that the polyol used in the binder resin of the surface protective layer is a polyether polyol. In the column of `` Biomass-derived component in polyol of surface protective layer '', the description of `` polyfunctional isocyanate '' means that at least the polyfunctional isocyanate among components used in the polyol of the binder resin of the surface protective layer is derived from biomass. It means there is.

  In Examples 1L to 1N, in the binder resin of the surface protective layer, one of the three constituent components of polyfunctional alcohol or polyfunctional isocyanate used in the polyether polyol or the isocyanate compound was a biomass-derived component. An example is given, but is not limited to this. For example, two of the three components may include a biomass-derived component, and all three components may include a biomass-derived component.

[Example 10]
A packaging material 20 was prepared in the same manner as in Example 1I, except that a polycarbonate polyol was used as the polyol for the binder resin of the surface protective layer 11. Specifically, a reaction product of a polyfunctional alcohol containing a biomass-derived component and a carbonate derived from a fossil fuel was used as the polycarbonate polyol.

[Example 1P]
As a binder resin for the surface protective layer 11, bio urethane (meth) acrylate, which is a reaction product of a fossil fuel-derived polycarbonate polyol, an isocyanate compound containing a biomass-derived component, and a fossil fuel-derived hydroxy (meth) acrylate, was used. Except for this, the packaging material 20 was produced in the same manner as in Example 10.

  FIG. 16B shows the layer configuration of the packaging material 20 of Examples 10 and 1P. In the column of “Type of polyol for surface protective layer” in FIG. 16B, the description “carbonate-based” means that the polyol used in the binder resin for the surface protective layer is a polycarbonate polyol.

  In Examples 1O and 1P, in the binder resin of the surface protective layer, an example was shown in which one of the two components, that is, the polyfunctional alcohol used for the polycarbonate polyol or the isocyanate compound was a biomass-derived component. However, it is not limited to this. For example, both of the two components may include a biomass-derived component.

[Example 2A]
A coated cardboard having a basis weight of 270 g / m ² was prepared as the paper base layer 13. Subsequently, the printing layer 12 having a urethane (meth) acrylate containing a biomass-derived component similar to that of Example 1A was formed on the paper base material layer 13 by the same UV offset printing as that of Example 1A. . Subsequently, the surface protection layer 11 containing the same urethane (meth) acrylate as in Example 1A was formed on the print layer 12 by the same UV offset printing as in Example 1A. Subsequently, the surface layer 14 was partially formed on the surface protection layer 11. Thus, the packaging material 30 having the layer configuration shown in FIG. 7 was produced.

The layer configuration of the packaging material 30 according to the present embodiment is expressed as follows.
Surface treatment / Table / Biomark / Paper “Surface treatment” means a surface layer partially formed on a surface protective layer.

  Subsequently, using the packaging material 30, a packaging product 30A shown in FIG. The packaged product 30A can be used, for example, as an outer box for confectionery, an outer box for medicines, or the like.

[Example 2B]
A packaging material 30 was produced in the same manner as in Example 2A except that the surface material 14 was not included.

The layer configuration of the packaging material 30 according to the present embodiment is expressed as follows.
Table / Biomark / Paper

  Note that, in the above-described embodiments 2A and 2B, the same variations as those in the embodiments 1B to 1P can be adopted. For example, as the print layer containing the biomass-derived component, the print layer shown in Examples 1B to 1H may be used in addition to the print layer shown in Example 1A. Further, as the surface protective layer, a surface protective layer containing a biomass-derived component as shown in Examples 1I to 1P may be used.

[Example 3]
A coated cardboard having a basis weight of 230 g / m ² was prepared as the paper base layer 13. Subsequently, the printing layer 12 having a urethane (meth) acrylate containing a biomass-derived component similar to that of Example 1A was formed on the paper base material layer 13 by the same UV offset printing as that of Example 1A. . Subsequently, the surface protection layer 11 containing the same urethane (meth) acrylate as in Example 1A was formed on the print layer 12 by the same UV offset printing as in Example 1A. Subsequently, the cardboard layer 31 was bonded to the paper base layer 13. The corrugated cardboard layer 31 used was a G corrugated board having a G flute having a corrugated height of about 0.5 mm. Thus, the packaging material 30 having the layer configuration shown in FIG. 8 was produced.

The layer configuration of the packaging material 30 according to the present embodiment is expressed as follows.
Table / Biomark / Paper / Corrugated “Corrugated” means corrugated cardboard layer.

  Subsequently, using the packaging material 30, a packaging product 30A shown in FIG. The package product 30A can be used, for example, as an outer box of an electronic device.

  Note that, in the above-described embodiments 2A and 2B, the same variations as those in the embodiments 1B to 1P can be adopted. For example, as the print layer containing the biomass-derived component, the print layer shown in Examples 1B to 1H may be used in addition to the print layer shown in Example 1A. Further, as the surface protective layer, a surface protective layer containing a biomass-derived component as shown in Examples 1I to 1P may be used.

[Example 4]
Ivory paper having a basis weight of 270 g / m ² was prepared as the paper base layer 13. Subsequently, the printing layer 12 having a urethane (meth) acrylate containing a biomass-derived component similar to that of Example 1A was formed on the paper base material layer 13 by the same UV offset printing as that of Example 1A. . Subsequently, the surface protection layer 11 containing the same urethane (meth) acrylate as in Example 1A was formed on the print layer 12 by the same UV offset printing as in Example 1A. Subsequently, the polyethylene terephthalate in a molten state was extruded onto the paper base layer 13 by a melt extrusion lamination method to form the inner resin layer 41. Thus, the packaging material 40 having the layer configuration shown in FIG. 12 was produced.

The layer configuration of the packaging material 40 of this embodiment is expressed as follows.
Table / Biomark / Paper / PET (2) 30
“PET (2)” means a layer of polyethylene terephthalate derived from fossil fuel formed by a melt extrusion lamination method.

  Subsequently, a paper tray 40A shown in FIG. The paper tray 40A can accommodate, for example, food that has been subjected to primary packaging.

  In this embodiment, the same variations as those in the embodiments 1B to 1P can be adopted. For example, as the print layer containing the biomass-derived component, the print layer shown in Examples 1B to 1H may be used in addition to the print layer shown in Example 1A. Further, as the surface protective layer, a surface protective layer containing a biomass-derived component as shown in Examples 1I to 1P may be used.

[Example 5]
The packaging material 40 was prepared in the same manner as in Example 4 except that the inner resin layer 41 was formed by extruding a polypropylene in a molten state on the paper base layer 13 by a melt extrusion lamination method. Produced.

The layer configuration of the packaging material 40 of this embodiment is expressed as follows.
Table / Biomark / Paper / PP (2) 30
"PP (2)" means a layer of polypropylene derived from fossil fuel formed by melt extrusion lamination.

  In this embodiment, the same variations as those in the embodiments 1B to 1P can be adopted. For example, as the print layer containing the biomass-derived component, the print layer shown in Examples 1B to 1H may be used in addition to the print layer shown in Example 1A. Further, as the surface protective layer, a surface protective layer containing a biomass-derived component as shown in Examples 1I to 1P may be used.

[Example 6A]
The packaging material 40 was prepared in the same manner as in Example 4 except that the inner resin layer 41 was formed by extruding polyethylene in a molten state on the paper base layer 13 by a melt extrusion lamination method. Produced.

The layer configuration of the packaging material 40 of this embodiment is expressed as follows.
Table / Biomark / Paper / PE (2) 30
“PE (2)” means a layer of polyethylene derived from fossil fuel formed by a melt extrusion lamination method.

  Subsequently, a paper tray 40A shown in FIG. The paper tray 40A can accommodate, for example, food that has been subjected to primary packaging.

[Example 6B]
A packaging material 40 was prepared in the same manner as in Example 6A, except that a biomass-derived component was used as the polyethylene of the inner resin layer 41.

The layer configuration of the packaging material 40 of this embodiment is expressed as follows.
Table / Biomark / Paper / BioPE (2) 30
“Bio PE (2)” means a layer of polyethylene containing a biomass-derived component, formed by a melt extrusion lamination method.

  Note that, in the above-described embodiments 6A and 6B, the same variations as those in the embodiments 1B to 1P can be adopted. For example, as the print layer containing the biomass-derived component, the print layer shown in Examples 1B to 1H may be used in addition to the print layer shown in Example 1A. Further, as the surface protective layer, a surface protective layer containing a biomass-derived component as shown in Examples 1I to 1P may be used.

[Example 7A]
Ivory paper having a basis weight of 270 g / m ² was prepared as the paper base layer 13. Subsequently, the printing layer 12 having a urethane (meth) acrylate containing a biomass-derived component similar to that of Example 1A was formed on the paper base material layer 13 by the same UV offset printing as that of Example 1A. . Subsequently, the surface protection layer 11 containing the same urethane (meth) acrylate as in Example 1A was formed on the print layer 12 by the same UV offset printing as in Example 1A. Subsequently, the film constituting the inner resin layer 41 and the paper base material layer 13 were bonded together via the adhesive layer 42 by a dry lamination method. As the film of the inner resin layer 41, a PET film (12 μm in thickness) containing polyethylene terephthalate derived from fossil fuel was used. In the dry lamination method, a polyester polyol, which is a reaction product of a polyfunctional alcohol derived from a fossil fuel and a polyfunctional carboxylic acid derived from a fossil fuel, was prepared as a main agent. Further, an isocyanate compound derived from a fossil fuel was prepared as a curing agent. Thus, the packaging material 40 having the layer configuration shown in FIG. 13 was produced.

The layer configuration of the packaging material 40 of this embodiment is expressed as follows.
Table / Biomark / Paper / Contact / PET (1) 12
“Contact” means an adhesive layer derived from a fossil fuel. “PET (1)” means a PET film containing fossil fuel-derived polyethylene terephthalate.

  Subsequently, a paper tray 40A shown in FIG. The paper tray 40A can accommodate, for example, food that has been subjected to primary packaging.

[Example 7B]
A packaging material 40 was prepared in the same manner as in Example 7A, except that a material containing polyethylene terephthalate derived from biomass was used as the polyethylene terephthalate of the inner resin layer 41, and a material containing biomass derived components was used as the adhesive layer 42. Was prepared. Specifically, as the inner resin layer 41, a PET film (12 μm in thickness) containing a biomass-derived component was used. As a main component of the adhesive layer 42, a polyester polyol which is a reaction product of a polyfunctional alcohol containing a biomass-derived component and a polyfunctional carboxylic acid derived from a fossil fuel was used.

The layer configuration of the packaging material 40 of this embodiment is expressed as follows.
Table / Bio stamp / Paper / Bio contact / Bio PET (1) 12
“Bio contact” means an adhesive layer containing a biomass-derived component. “Bio PET (1)” means a PET film containing a biomass-derived component.

  Note that, in the above-described embodiments 7A and 7B, the same variations as those in the embodiments 1B to 1P can be adopted. For example, as the print layer containing the biomass-derived component, the print layer shown in Examples 1B to 1H may be used in addition to the print layer shown in Example 1A. Further, as the surface protective layer, a surface protective layer containing a biomass-derived component as shown in Examples 1I to 1P may be used.

Example 8
A packaging material 40 was produced in the same manner as in Example 7A, except that a polypropylene film (thickness: 20 μm) containing fossil fuel-derived polypropylene was used as the inner resin layer 41.

The layer configuration of the packaging material 40 of this embodiment is expressed as follows.
Table / Biomark / Paper / Contact / PP (1) 20
“PP (1)” means a polypropylene film containing fossil fuel derived polypropylene.

  Subsequently, a paper tray 40A shown in FIG. The paper tray 40A can accommodate, for example, food that has been subjected to primary packaging.

  In this embodiment, the same variations as those in the embodiments 1B to 1P can be adopted. For example, as the print layer containing the biomass-derived component, the print layer shown in Examples 1B to 1H may be used in addition to the print layer shown in Example 1A. Further, as the surface protective layer, a surface protective layer containing a biomass-derived component as shown in Examples 1I to 1P may be used.

[Example 9]
A packaging material was prepared in the same manner as in Example 6A, except that a material formed by extruding polymethylpentene in a molten state on the paper base material layer 13 by a melt extrusion lamination method was used as the inner resin layer 41. 40 were produced.

The layer configuration of the packaging material 40 of this embodiment is expressed as follows.
Table / Biomark / Paper / PMP (2) 30
“PMP (2)” means a layer of polymethylpentene derived from fossil fuel formed by melt extrusion lamination.

  Subsequently, a paper tray 40A shown in FIG. The paper tray 40A can accommodate, for example, food that has been subjected to primary packaging.

  In this embodiment, the same variations as those in the embodiments 1B to 1P can be adopted. For example, as the print layer containing the biomass-derived component, the print layer shown in Examples 1B to 1H may be used in addition to the print layer shown in Example 1A. Further, as the surface protective layer, a surface protective layer containing a biomass-derived component as shown in Examples 1I to 1P may be used.

[Example 10]
A packaging material was prepared in the same manner as in Example 6A, except that the inner resin layer 41 was formed by extruding polybutylene terephthalate in a molten state on the paper base material layer 13 by a melt extrusion lamination method. 40 were produced.

The layer configuration of the packaging material 40 of this embodiment is expressed as follows.
Table / Biomark / Paper / PBT (2) 30
“PBT (2)” means a layer of polybutylene terephthalate derived from fossil fuel formed by a melt extrusion lamination method.

  Subsequently, a paper tray 40A shown in FIG. The paper tray 40A can accommodate, for example, food that has been subjected to primary packaging.

  In this embodiment, the same variations as those in the embodiments 1B to 1P can be adopted. For example, as the print layer containing the biomass-derived component, the print layer shown in Examples 1B to 1H may be used in addition to the print layer shown in Example 1A. Further, as the surface protective layer, a surface protective layer containing a biomass-derived component as shown in Examples 1I to 1P may be used.

  FIG. 17 shows an example of the layer configuration of the packaging material 10 and examples of the type of the packaging container in Examples 1A and 2A to 10 collectively.

REFERENCE SIGNS LIST 11 surface protection layer 12 printing layer 13 paper base layer 14 surface layer 20 packaging material 20A packaging product 21 anchor coat layer 22 sealant layer 23 metal foil 24 adhesive resin layer 25 adhesive resin layer 30 packaging material 30A packaging product 31 cardboard layer 32 vapor deposition Film 33 Adhesive layer 34 Adhesive resin layer 40 Packaging material 40A Packaging product 41 Inner resin layer 42 Adhesive layer 50 Heat insulating container 51 Paper cup body 52 Outer cylinder 55 Paper cup

Claims (6)

At least a surface protective layer, a printing layer, a packaging material in which a paper base layer is sequentially laminated,
The printing layer includes a colorant, a urethane (meth) acrylate that is a reaction product of a polyol, an isocyanate compound, and hydroxy (meth) acrylate,
A packaging material, wherein at least one of the polyol, the isocyanate compound, or the hydroxy (meth) acrylate contains a biomass-derived component.   The packaging material according to claim 1, wherein the polyol includes a biomass-derived component.   The packaging material according to claim 1, wherein the isocyanate compound contains a biomass-derived component.   The packaging material according to any one of claims 1 to 3, wherein the surface protective layer contains urethane (meth) acrylate, which is a reaction product of a polyol, an isocyanate compound, and hydroxy (meth) acrylate.   The packaging material according to claim 4, wherein at least one of the polyol, the isocyanate compound, or the hydroxy (meth) acrylate of the surface protective layer contains a biomass-derived component.   A packaged product comprising the packaging material according to any one of claims 1 to 5.