WO2021200625A1 - Laminate having biomass-derived resin layer, and liquid-use paper container and packaging product in which said laminate is used - Google Patents

Laminate having biomass-derived resin layer, and liquid-use paper container and packaging product in which said laminate is used Download PDF

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Publication number
WO2021200625A1
WO2021200625A1 PCT/JP2021/012794 JP2021012794W WO2021200625A1 WO 2021200625 A1 WO2021200625 A1 WO 2021200625A1 JP 2021012794 W JP2021012794 W JP 2021012794W WO 2021200625 A1 WO2021200625 A1 WO 2021200625A1
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Prior art keywords
biomass
laminate
resin layer
derived
polyethylene resin
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PCT/JP2021/012794
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French (fr)
Japanese (ja)
Inventor
絵里 鈴木
政博 浜村
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日本製紙株式会社
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Priority claimed from JP2020061675A external-priority patent/JP2021160113A/en
Priority claimed from JP2020061674A external-priority patent/JP2021160112A/en
Application filed by 日本製紙株式会社 filed Critical 日本製紙株式会社
Publication of WO2021200625A1 publication Critical patent/WO2021200625A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/022—Mechanical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/027—Thermal properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/06—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging

Definitions

  • the present invention relates to a laminate having a resin layer derived from biomass, and a liquid paper container and a packaging product using the same.
  • biomass has been widely used as a substitute for fossil fuels in the material field from the viewpoint of global warming countermeasures and the construction of a sound material-cycle society.
  • a biomass polyethylene resin containing polyethylene derived from biomass and polyethylene derived from fossil fuel is used, for example, in a laminate used for liquid paper containers and packaging products based on paper, and is derived from fossil fuel. It is used as an alternative to polyethylene.
  • a laminate in which a biomass polyethylene resin is used it is a laminate including at least a first polyolefin resin layer, a paper base material layer, and a second polyolefin resin layer, and the first and first layers are described above.
  • a laminate in which the polyolefin resin layer of No. 2 contains polyethylene derived from biomass and polyethylene derived from fossil fuel is disclosed (see, for example, Patent Documents 1 and 2).
  • biomass polyethylene resin that forms a polyolefin resin layer containing polyethylene derived from biomass and polyethylene derived from fossil fuel is sufficient for global warming countermeasures and construction of a recycling society. It must be able to respond to the reduction of environmental load, and when molding liquid paper containers, packaging products, etc. using laminates using biomass polyethylene resin, conventional filling machines and processing It must not impair the workability of the machine.
  • the present inventors have come to realize the present invention by paying close attention to such a viewpoint.
  • An object of the present invention is a laminate having a biomass-derived resin layer having good processability, which can sufficiently reduce the environmental load to cope with global warming countermeasures and the construction of a sound material-cycle society, and a liquid using the same. To provide paper containers and packaging products.
  • the invention according to claim 1 is a biomass containing polyethylene derived from biomass and polyethylene derived from fossil fuel on either the front or back surface of the paper substrate layer or either the front or back surface. It is a laminate provided with a biomass polyethylene resin layer formed of a polyethylene resin, and is characterized in that the degree of biomass in the biomass polyethylene resin layer is 70% or more.
  • the biomass degree in the biomass polyethylene resin layer is 70% or more, the amount of fossil fuel used in the laminate provided with the biomass polyethylene resin layer can be significantly reduced. This will enable us to reduce the environmental load that can fully respond to global warming countermeasures and the construction of a sound-cycle society.
  • the invention according to claim 2 is characterized in that the melt mass flow rate of the biomass polyethylene resin forming the biomass polyethylene resin layer according to claim 1 is 4.5 g / 10 min to 10 g / 10 min.
  • the melt mass flow rate of the biomass polyethylene resin forming the biomass polyethylene resin layer is 4.5 g / 10 min to 10 g / 10 min, it is easy to flow and low-temperature sealing becomes possible. It is possible to reduce the energy cost required for sealing processing of, for example, liquid paper containers and packaging products molded from laminated bodies.
  • the invention according to claim 3 is characterized in that the flexural modulus of the biomass polyethylene resin layer according to claim 1 or 2 is 150 MPa or less.
  • the bending elasticity of the biomass polyethylene resin layer of the biomass polyethylene resin forming the biomass polyethylene resin layer is 150 MPa or less, the bending repulsion of the laminate 1 is not too strong.
  • the processability of, for example, a liquid paper container or a packaged product molded from the laminate is good.
  • the invention according to claim 4 is a liquid paper container, characterized in that the laminate according to any one of claims 1 to 3 is used.
  • the liquid paper container is formed by using the laminate according to any one of claims 1 to 3, it sufficiently responds to global warming countermeasures and construction of a sound material-cycle society. It is possible to obtain a liquid paper container with a reduced environmental load, and since the energy cost required for sealing at the time of molding is low, an inexpensive liquid paper container can be obtained.
  • the invention according to claim 5 is a packaged product, and is characterized by using the laminate according to any one of claims 1 to 3.
  • the packaged product is molded using the laminate according to any one of claims 1 to 3, it is sufficient for global warming countermeasures and construction of a sound material-cycle society. It is possible to obtain a packaged product with a reduced environmental load that can be met, and because the energy cost required for sealing at the time of molding is low, an inexpensive packaged product can be obtained.
  • the laminate having a biomass-derived resin layer according to the present invention it is possible to reduce the environmental load that can sufficiently respond to global warming countermeasures and the construction of a sound material-cycle society. Then, by molding a liquid paper container or a packaged product using this laminate, a liquid paper container or a packaged product having good workability and low cost can be obtained.
  • FIG. 1 is an explanatory view showing a first example of a laminated structure of a laminated body having a biomass-derived resin layer according to the present invention.
  • the laminate 1 having the biomass-derived resin layer of this example (hereinafter, simply referred to as the laminate) is a biomass polyethylene resin containing polyethylene derived from biomass and polyethylene derived from fossil fuel on the surface of the paper base material layer 2.
  • the formed biomass polyethylene resin layer 3 is laminated, and the barrier layer 4, the adhesive resin layer 5, and the thermoplastic resin layer 6 containing polyethylene as a main component are laminated in this order on the back surface of the paper base material layer 2. ing.
  • the paper base material is not particularly limited in the paper base material layer 2, and a known paper base material used for liquid paper containers and packaging products is used. Further, in this example, the back surface side of the paper base material layer 2 is the inner surface side of the liquid paper container or the packaging product.
  • the biomass polyethylene resin layer 3 laminated on the surface of the paper base material layer 2 contains polyethylene derived from biomass and polyethylene derived from fossil fuel.
  • Biomass-derived polyethylene consists of a polymer of biomass-derived ethylene-containing monomers.
  • the production of biomass-derived ethylene is not particularly limited, and is produced by a known method.
  • plant raw materials include, but are not limited to, corn, sugar cane, beet, and the like.
  • the method for polymerizing a monomer containing ethylene derived from biomass is not particularly limited, and a known method can be used.
  • the fossil fuel-derived polyethylene is composed of a polymer of a fossil fuel-derived ethylene and / or a monomer containing an ⁇ -olefin.
  • the production of ethylene and / or ⁇ -olefin derived from fossil fuel is not particularly limited, and a monomer produced by a known method and containing ethylene and / or ⁇ -olefin derived from fossil fuel is used.
  • the method of polymerization is not particularly limited, and a known method can be used.
  • the method for producing the biomass polyethylene resin layer 3 containing polyethylene derived from biomass and polyethylene derived from fossil fuel is not particularly limited, and a known method can be used.
  • the blending of polyethylene derived from biomass and polyethylene derived from fossil fuel is such that the degree of biomass in the biomass polyethylene resin layer 3 is 70% or more.
  • the amount of fossil fuel used is significantly reduced by laminating the biomass polyethylene resin layer 3 on the laminate 1, which is sufficient for global warming countermeasures and the construction of a sound material-cycle society. It is possible to reduce the environmental load. If the biomass content is less than 70%, such an effect cannot be expected.
  • the melt mass flow rate of the biomass polyethylene resin forming the biomass polyethylene resin layer 3 is set to 4.5 g / 10 min to 10 g / 10 min.
  • the melt mass flow rate of the biomass polyethylene resin forming the biomass polyethylene resin layer 3 is 4.5 g / 10 min to 10 g / min, the biomass polyethylene resin easily flows, and the biomass polyethylene resin layer 3 can be sealed at a low temperature, so that the laminate It is possible to reduce the energy cost required for sealing processing of, for example, a liquid paper container or a packaged product molded in 1.
  • melt mass flow rate of the biomass polyethylene resin is less than 4.5 g / 10 min, a high temperature is required for sealing the biomass polyethylene resin layer 3, and the laminate 1 is molded, for example, sealing a liquid paper container or a packaging product. The energy cost required for this will increase. Further, if the melt mass flow rate of the biomass polyethylene resin exceeds 10 g / min, pinholes may be formed in the seal portion.
  • the flexural modulus of the biomass polyethylene resin forming the biomass polyethylene resin layer 3 is set to 150 MPa or less.
  • the flexural modulus of the biomass polyethylene resin exceeds 150 MPa, the bending repulsion of the laminate 1 becomes strong, which makes it difficult to mold, for example, a liquid paper container or a packaged product.
  • the flexural modulus of the biomass polyethylene resin is not particularly limited as long as it is 150 MPa or less, but it is preferably 150 MPa or more. If the flexural modulus of the biomass polyethylene resin is less than 40 MPa, the moldability is good but the strength is lowered, and the required strength may not be obtained depending on the liquid paper container or the packaging product.
  • a deodorant is added to the biomass polyethylene resin forming the biomass polyethylene resin layer 3.
  • a porous substance such as zeolite or silicate, a metal oxide, a chemically adsorbed substance having an acidic group or a basic group, or the like is used in this example.
  • the deodorant added to the biomass polyethylene resin is added in a masterbatch.
  • the amount of the deodorant added to the biomass polyethylene resin is preferably 0.1 to 10 parts by weight.
  • the amount of the deodorant added is less than 0.1 parts by weight, the odor of the biomass raw material of the biomass polyethylene resin may not be sufficiently deodorized, and if it exceeds 10 parts by weight, the odor of the first biomass polyethylene resin layer 3 may not be sufficiently deodorized. The strength may decrease.
  • the odor barrier layer 4 is made of an aluminum foil, a metal vapor deposition film, a ceramic vapor deposition film other than metal, an ethylene vinyl alcohol copolymer (EVOH), polyvinylidene chloride (PVDC), polyethylene terephthalate (PET) nylon resin, or the like.
  • EVOH ethylene vinyl alcohol copolymer
  • PVDC polyvinylidene chloride
  • PET polyethylene terephthalate
  • the adhesive resin layer 5 is not particularly limited as long as it is an adhesive resin as a material for forming the adhesive resin layer 5, but when the material of the odor barrier layer 4 is aluminum foil, both ethylene and methacrylic acid are used.
  • a polymer resin (EMAA) is suitable.
  • thermoplastic resin layer 6 containing polyethylene as a main component is mainly composed of a high-pressure method low-density polyethylene resin.
  • the amount of fossil fuel used in the laminated body 1 including the biomass polyethylene resin layer 3 is used. It will be possible to significantly reduce the amount of fuel, and it will be possible to reduce the environmental load that can fully respond to global warming countermeasures and the construction of a sound-cycle society.
  • the melt mass flow rate of the biomass polyethylene resin forming the biomass polyethylene resin layer 3 is 4.5 g / 10 min to 10 g / 10 min, it is easy to flow and low-temperature sealing is possible, and the laminate 1 is formed. For example, the energy cost required for sealing processing of liquid paper containers and packaging products can be reduced.
  • the bending elasticity of the biomass polyethylene resin layer of the biomass polyethylene resin forming the biomass polyethylene resin layer 3 is 150 MPa or less, the bending repulsion of the laminated body 1 is not too strong, and the laminated body 1 is molded.
  • the processability of liquid paper containers and packaging products is good.
  • FIG. 2 is an explanatory view showing a second example of a laminated structure of a laminated body having a biomass-derived resin layer according to the present invention.
  • a biomass polyethylene resin layer 3 formed of a biomass polyethylene resin containing polyethylene derived from biomass and polyethylene derived from fossil fuel is laminated on the surface of the paper base material layer 2, and the paper base material layer 1 is formed.
  • a biomass polyethylene resin layer 7 formed of a biomass polyethylene resin containing polyethylene derived from biomass and polyethylene derived from fossil fuel, a barrier layer 4, an adhesive resin layer 5, and a thermoplastic containing polyethylene as main components.
  • the resin layer 6 is laminated in this order.
  • the biomass polyethylene resin layer 3 of this example is the same as the biomass polyethylene resin layer 3 of the first example, and the biomass polyethylene resin layer 7 is the same as the biomass polyethylene resin layer 3, and the biomass polyethylene resin layer 3 of this example.
  • the biomass polyethylene resin layer 7 refer to the description of the biomass polyethylene resin layer 3 of the first example.
  • the barrier layer 4 of this example, the adhesive resin layer 5 and the thermoplastic resin layer 6 containing polyethylene as main components are thermoplastic having the barrier layer 4 of the first example, the adhesive resin layer 5 and polyethylene as main components. Since it is the same as the resin layer 6, the description of the first example is used for each. Further, the effect of this example is the same as that of the first example, and the explanation of the first example is incorporated.
  • FIG. 3 is an explanatory view showing a second example of a laminated structure of a laminated body having a biomass-derived resin layer according to the present invention.
  • a thermoplastic resin layer 8 containing polyethylene as a main component is laminated on the surface of the paper base material layer 2, and the back surface of the paper base material layer 2 is derived from biomass as in the second example.
  • a biomass polyethylene resin layer 7 formed of a polyethylene resin containing polyethylene and polyethylene derived from fossil fuel, a barrier layer 4, an adhesive resin layer 5, and a thermoplastic resin layer 6 containing polyethylene as a main component are formed. They are stacked in order. Further, the effect of this example is the same as that of the first example, and the explanation of the first example is incorporated.
  • the liquid paper container and the packaged product according to the present invention are molded using the above-mentioned laminate 1, and are molded according to a known molding process.
  • the shape of the liquid paper container and the packaged product to be molded is not particularly limited.
  • the liquid paper container and packaging product are molded using the above-mentioned laminate 1, the liquid paper container and packaging product are designed to reduce the environmental load that can sufficiently respond to global warming countermeasures and the construction of a sound material-cycle society. Is obtained. Further, since the energy cost required for the sealing process during molding is low, inexpensive liquid paper containers and packaging products can be obtained.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Ceramic Engineering (AREA)
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  • Wrappers (AREA)

Abstract

A laminate 1 is provided in order to: obtain a laminate comprising a biomass-derived resin layer, the laminate having excellent workability and achieving a reduction in environmental load that sufficiently meets needs in terms of countermeasures against global warming and the building of a recycling-based society; and also obtain a liquid-use paper container and a packaging product in which the laminate is used. On the front surface and/or the back surface of a paper substrate layer 2, the laminate 1 comprises a biomass polyethylene resin layer 3 formed of a biomass polyethylene resin containing: biomass-derived polyethylene; and fossil fuel-derived polyethylene. The laminate 1 is configured such that the amount of the fossil fuel used in the laminate 1 can be greatly reduced by setting the biomass ratio in the biomass polyethylene resin layer 3 to at least 70%.

Description

バイオマス由来の樹脂層を有する積層体、およびそれを用いた液体用紙容器および包装製品Laminates with a biomass-derived resin layer, and liquid paper containers and packaging products using them.
　本発明は、バイオマス由来の樹脂層を有する積層体、およびそれを用いた液体用紙容器および包装製品に関する。 The present invention relates to a laminate having a resin layer derived from biomass, and a liquid paper container and a packaging product using the same.
　近年、地球温暖化対策や循環型社会の構築といった観点から、材料分野において化石燃料の代替品としてバイオマスが広く利用されている。
　その利用の１つとして、バイオマス由来のポリエチレンと化石燃料由来のポリエチレンとを含んだバイオマスポリエチレン樹脂が、例えば、紙を基材とする液体用紙容器や包装製品などに用いる積層体に、化石燃料由来のポリエチレンに代わるものとして利用されている。 In recent years, biomass has been widely used as a substitute for fossil fuels in the material field from the viewpoint of global warming countermeasures and the construction of a sound material-cycle society.
As one of its uses, a biomass polyethylene resin containing polyethylene derived from biomass and polyethylene derived from fossil fuel is used, for example, in a laminate used for liquid paper containers and packaging products based on paper, and is derived from fossil fuel. It is used as an alternative to polyethylene.
　従来、バイオマスポリエチレン樹脂が利用された積層体として、少なくとも、第１のポリオレフィン樹脂層と、紙基材層と、第２のポリオレフィン樹脂層とを備える積層体であって、前記の第１および第２のポリオレフィン樹脂層がバイオマス由来のポリエチレンと化石燃料由来のポリエチレンとを含むものとした積層体が開示されている（例えば、特許文献１、２参照）。 Conventionally, as a laminate in which a biomass polyethylene resin is used, it is a laminate including at least a first polyolefin resin layer, a paper base material layer, and a second polyolefin resin layer, and the first and first layers are described above. A laminate in which the polyolefin resin layer of No. 2 contains polyethylene derived from biomass and polyethylene derived from fossil fuel is disclosed (see, for example, Patent Documents 1 and 2).
特開２０１８－１６０９号公報Japanese Unexamined Patent Publication No. 2018-1609 特開２０１８－１６１０号公報JP-A-2018-1610
　バイオマスポリエチレン樹脂が利用された積層体にあって、バイオマス由来のポリエチレンと化石燃料由来のポリエチレンとを含むポリオレフィン樹脂層を形成するバイオマスポリエチレン樹脂は、地球温暖化対策や循環型社会の構築に十分に応えられる環境負荷の低減化が図れるものでなければならず、また、バイオマスポリエチレン樹脂が利用された積層体を用いた、例えば、液体用紙容器や包装製品などの成形に際し、従来の充填機や加工機による加工性を損ねるものになってはならない。
　本発明者等は、かかる観点に注視し本発明を成すに至った。 In a laminate using biomass polyethylene resin, biomass polyethylene resin that forms a polyolefin resin layer containing polyethylene derived from biomass and polyethylene derived from fossil fuel is sufficient for global warming countermeasures and construction of a recycling society. It must be able to respond to the reduction of environmental load, and when molding liquid paper containers, packaging products, etc. using laminates using biomass polyethylene resin, conventional filling machines and processing It must not impair the workability of the machine.
The present inventors have come to realize the present invention by paying close attention to such a viewpoint.
　本発明の目的は、地球温暖化対策や循環型社会の構築に十分に応えられる環境負荷の低減化が図れ、且つ加工性のよいバイオマス由来の樹脂層を有する積層体、およびそれを用いた液体用紙容器および包装製品を提供することにある。 An object of the present invention is a laminate having a biomass-derived resin layer having good processability, which can sufficiently reduce the environmental load to cope with global warming countermeasures and the construction of a sound material-cycle society, and a liquid using the same. To provide paper containers and packaging products.
　上記の目的を達成するために、請求項１に記載の発明は、紙基材層の表裏面に、または表裏面のいずれか一方にバイオマス由来のポリエチレンと化石燃料由来のポリエチレンとを含んだバイオマスポリエチレン樹脂で形成されたバイオマスポリエチレン樹脂層を備える積層体であって、バイオマスポリエチレン樹脂層中のバイオマス度が７０％以上であることを特徴とする。 In order to achieve the above object, the invention according to claim 1 is a biomass containing polyethylene derived from biomass and polyethylene derived from fossil fuel on either the front or back surface of the paper substrate layer or either the front or back surface. It is a laminate provided with a biomass polyethylene resin layer formed of a polyethylene resin, and is characterized in that the degree of biomass in the biomass polyethylene resin layer is 70% or more.
　請求項１に記載の発明によれば、前記バイオマスポリエチレン樹脂層中のバイオマス度が７０％以上であるので、前記バイオマスポリエチレン樹脂層を備える積層体における化石燃料の使用量を大幅に削減することができることになり、地球温暖化対策や循環型社会の構築に十分に応えられる環境負荷の低減化を図ることができる。 According to the invention of claim 1, since the biomass degree in the biomass polyethylene resin layer is 70% or more, the amount of fossil fuel used in the laminate provided with the biomass polyethylene resin layer can be significantly reduced. This will enable us to reduce the environmental load that can fully respond to global warming countermeasures and the construction of a sound-cycle society.
　請求項２に記載の発明は、請求項１に記載の、前記バイオマスポリエチレン樹脂層を形成するバイオマスポリエチレン樹脂のメルトマスフローレートは４．５ｇ／１０ｍｉｎ～１０ｇ／１０ｍｉｎであることを特徴とする。 The invention according to claim 2 is characterized in that the melt mass flow rate of the biomass polyethylene resin forming the biomass polyethylene resin layer according to claim 1 is 4.5 g / 10 min to 10 g / 10 min.
　請求項２に記載の発明によれば、前記バイオマスポリエチレン樹脂層を形成する前記バイオマスポリエチレン樹脂のメルトマスフローレートは４．５ｇ／１０ｍｉｎ～１０ｇ／１０ｍｉｎであるので、流れやすく低温シールが可能となり、前記積層体で成形される、例えば液体用紙容器や包装製品のシール加工に要するエネルギーコストの低減化が図れる。 According to the invention of claim 2, since the melt mass flow rate of the biomass polyethylene resin forming the biomass polyethylene resin layer is 4.5 g / 10 min to 10 g / 10 min, it is easy to flow and low-temperature sealing becomes possible. It is possible to reduce the energy cost required for sealing processing of, for example, liquid paper containers and packaging products molded from laminated bodies.
　請求項３に記載の発明は、請求項１または２に記載の、前記バイオマスポリエチレン樹脂層の曲げ弾性率は１５０ＭＰａ以下であることを特徴とする。 The invention according to claim 3 is characterized in that the flexural modulus of the biomass polyethylene resin layer according to claim 1 or 2 is 150 MPa or less.
　請求項３に記載の発明によれば、前記バイオマスポリエチレン樹脂層を形成する前記バイオマスポリエチレン樹脂のバイオマスポリエチレン樹脂層の曲げ弾性率は１５０ＭＰａ以下であるので、積層体１の曲げ反発が強すぎず、前記積層体で成形される、例えば液体用紙容器や包装製品の加工性が良い。 According to the invention of claim 3, since the bending elasticity of the biomass polyethylene resin layer of the biomass polyethylene resin forming the biomass polyethylene resin layer is 150 MPa or less, the bending repulsion of the laminate 1 is not too strong. The processability of, for example, a liquid paper container or a packaged product molded from the laminate is good.
　請求項４に記載の発明は、液体用紙容器であって、請求項１～３のいずれか１項に記載の積層体を用いてなることを特徴とする。 The invention according to claim 4 is a liquid paper container, characterized in that the laminate according to any one of claims 1 to 3 is used.
　請求項４に記載の発明によれば、液体用紙容器が請求項１～３のいずれか１項に積層体を用いて成形されるので、地球温暖化対策や循環型社会の構築に十分に応えられる環境負荷の低減化を図った液体用紙容器を得ることができ、そして、成形の際にシール加工に要するエネルギーコストが低いので、安価な液体用紙容器を得ることができる。 According to the invention of claim 4, since the liquid paper container is formed by using the laminate according to any one of claims 1 to 3, it sufficiently responds to global warming countermeasures and construction of a sound material-cycle society. It is possible to obtain a liquid paper container with a reduced environmental load, and since the energy cost required for sealing at the time of molding is low, an inexpensive liquid paper container can be obtained.
　請求項５に記載の発明は、包装製品であって、請求項１～３のいずれか１項に記載の積層体を用いてなることを特徴とする。 The invention according to claim 5 is a packaged product, and is characterized by using the laminate according to any one of claims 1 to 3.
　請求項５に記載の発明によれば、包装製品が請求項１～３のいずれか１項に記載の積層体を用いて成形されるので、地球温暖化対策や循環型社会の構築に十分に応えられる環境負荷の低減化を図った包装製品を得ることができ、そして、成形の際にシール加工に要するエネルギーコストが低いので、安価な包装製品を得ることができる。 According to the invention of claim 5, since the packaged product is molded using the laminate according to any one of claims 1 to 3, it is sufficient for global warming countermeasures and construction of a sound material-cycle society. It is possible to obtain a packaged product with a reduced environmental load that can be met, and because the energy cost required for sealing at the time of molding is low, an inexpensive packaged product can be obtained.
　本発明に係るバイオマス由来の樹脂層を有する積層体によれば、地球温暖化対策や循環型社会の構築に十分に応えられる環境負荷の低減化を図ることができる。そして、この積層体を用いて液体用紙容器や包装製品を成形することにより、加工性がよく、且つ安価な液体用紙容器や包装製品を得ることができる。 According to the laminate having a biomass-derived resin layer according to the present invention, it is possible to reduce the environmental load that can sufficiently respond to global warming countermeasures and the construction of a sound material-cycle society. Then, by molding a liquid paper container or a packaged product using this laminate, a liquid paper container or a packaged product having good workability and low cost can be obtained.
本発明に係るバイオマス由来の樹脂層を有する積層体の積層構造の第１例を示す説明図である。It is explanatory drawing which shows the 1st example of the laminated structure of the laminated body which has a resin layer derived from biomass which concerns on this invention. 本発明に係るバイオマス由来の樹脂層を有する積層体の積層構造の第２例を示す説明図である。It is explanatory drawing which shows the 2nd example of the laminated structure of the laminated body which has a resin layer derived from biomass which concerns on this invention. 本発明に係るバイオマス由来の樹脂層を有する積層体の積層構造の第３例を示す説明図である。It is explanatory drawing which shows the 3rd example of the laminated structure of the laminated body which has a resin layer derived from biomass which concerns on this invention.
　以下、本発明に係る積層体およびこの積層体を用いた液体用紙容器および包装製品の実施の形態の一例を詳細に説明する。 Hereinafter, an example of the laminate according to the present invention and the embodiment of the liquid paper container and the packaging product using the laminate will be described in detail.
　先ず、本発明に係るバイオマス由来の樹脂層を有する積層体の実施の形態の一例を説明する。
　図１は本発明に係るバイオマス由来の樹脂層を有する積層体の積層構造の第１例を示す説明図である。 First, an example of an embodiment of a laminate having a biomass-derived resin layer according to the present invention will be described.
FIG. 1 is an explanatory view showing a first example of a laminated structure of a laminated body having a biomass-derived resin layer according to the present invention.
　本例のバイオマス由来の樹脂層を有する積層体１（以下、単に積層体という。）は、紙基材層２の表面にバイオマス由来のポリエチレンと化石燃料由来のポリエチレンとを含んだバイオマスポリエチレン樹脂で形成されたバイオマスポリエチレン樹脂層３が積層され、紙基材層２の裏面に、バリア層４と接着性樹脂層５とポリエチレンを主成分とする熱可塑性樹脂層６とが、この順で積層されている。 The laminate 1 having the biomass-derived resin layer of this example (hereinafter, simply referred to as the laminate) is a biomass polyethylene resin containing polyethylene derived from biomass and polyethylene derived from fossil fuel on the surface of the paper base material layer 2. The formed biomass polyethylene resin layer 3 is laminated, and the barrier layer 4, the adhesive resin layer 5, and the thermoplastic resin layer 6 containing polyethylene as a main component are laminated in this order on the back surface of the paper base material layer 2. ing.
　紙基材層２にあって、紙基材は特に限定されるものではなく、液体用紙容器や包装製品に使用される公知の紙基材が用いられる。
　また、本例では、紙基材層２の裏面側が液体用紙容器や包装製品の内面側となっている。 The paper base material is not particularly limited in the paper base material layer 2, and a known paper base material used for liquid paper containers and packaging products is used.
Further, in this example, the back surface side of the paper base material layer 2 is the inner surface side of the liquid paper container or the packaging product.
　紙基材層２の表面に積層されているバイオマスポリエチレン樹脂層３は、バイオマス由来のポリエチレンと、化石燃料由来のポリエチレンとを含んでいる。 The biomass polyethylene resin layer 3 laminated on the surface of the paper base material layer 2 contains polyethylene derived from biomass and polyethylene derived from fossil fuel.
　バイオマス由来のポリエチレンは、バイオマス由来のエチレンを含むモノマーの重合体からなる。
　バイオマス由来のエチレンの製造にあっては、特に限定されるものではなく、公知の方法で製造される。バイオマス由来のエチレンの製造では、植物原料から得られるバイオマス由来の発酵エタノールを原料として用い製造することが好ましい。植物原料としては、例えば、トウモロコシ、サトウキビ、ビートなどが挙げられるが、これらに限られない。また、バイオマス由来のエチレンを含むモノマーを重合する方法は、特に限定されるものではなく、公知の方法で行うことができる。 Biomass-derived polyethylene consists of a polymer of biomass-derived ethylene-containing monomers.
The production of biomass-derived ethylene is not particularly limited, and is produced by a known method. In the production of ethylene derived from biomass, it is preferable to use fermented ethanol derived from biomass obtained from a plant raw material as a raw material. Examples of plant raw materials include, but are not limited to, corn, sugar cane, beet, and the like. The method for polymerizing a monomer containing ethylene derived from biomass is not particularly limited, and a known method can be used.
　また、化石燃料由来のポリエチレンは、化石燃料由来のエチレンおよび／またはα－オレフィンを含むモノマーの重合体からなる。
　化石燃料由来のエチレンおよび／またはα－オレフィンの製造にあっては、特に限定されるものではなく、公知の方法で製造され、また、化石燃料由来のエチレンおよび／またはα－オレフィンを含むモノマーを重合する方法は特に限定されるものではなく、公知の方法で行うことができる。 Further, the fossil fuel-derived polyethylene is composed of a polymer of a fossil fuel-derived ethylene and / or a monomer containing an α-olefin.
The production of ethylene and / or α-olefin derived from fossil fuel is not particularly limited, and a monomer produced by a known method and containing ethylene and / or α-olefin derived from fossil fuel is used. The method of polymerization is not particularly limited, and a known method can be used.
　また、バイオマス由来のポリエチレンと、化石燃料由来のポリエチレンとを含んだバイオマスポリエチレン樹脂層３の製造方法にあっても、特に限定されるものではなく、公知の方法で行うことができる。 Further, the method for producing the biomass polyethylene resin layer 3 containing polyethylene derived from biomass and polyethylene derived from fossil fuel is not particularly limited, and a known method can be used.
　バイオマス由来のポリエチレンと化石燃料由来のポリエチレンとの配合は、バイオマスポリエチレン樹脂層３中のバイオマス度が７０％以上となるようにする。
　バイオマス度を７０％以上であると、積層体１にバイオマスポリエチレン樹脂層３を積層させることにより、化石燃料の使用量を大幅に削減し、地球温暖化対策や循環型社会の構築に十分に応えられる環境負荷の低減化を図れる。バイオマス度が７０％未満であると、こういった効果は期待できない。 The blending of polyethylene derived from biomass and polyethylene derived from fossil fuel is such that the degree of biomass in the biomass polyethylene resin layer 3 is 70% or more.
When the biomass degree is 70% or more, the amount of fossil fuel used is significantly reduced by laminating the biomass polyethylene resin layer 3 on the laminate 1, which is sufficient for global warming countermeasures and the construction of a sound material-cycle society. It is possible to reduce the environmental load. If the biomass content is less than 70%, such an effect cannot be expected.
　また、本例では、バイオマスポリエチレン樹脂層３を形成するバイオマスポリエチレン樹脂のメルトマスフローレートは４．５ｇ／１０ｍｉｎ～１０ｇ／１０ｍｉｎとなるようにしている。
　バイオマスポリエチレン樹脂層３を形成するバイオマスポリエチレン樹脂のメルトマスフローレートが４．５ｇ／１０ｍｉｎ～１０ｇ／ｍｉｎであると、バイオマスポリエチレン樹脂が流れやすく、バイオマスポリエチレン樹脂層３の低温シールが可能となり、積層体１で成形される、例えば液体用紙容器や包装製品のシール加工に要するエネルギーコストの低減化が図れる。
　バイオマスポリエチレン樹脂のメルトマスフローレートが４．５ｇ／１０ｍｉｎ未満であると、バイオマスポリエチレン樹脂層３のシールに高い温度が必要となり、積層体１で成形される、例えば液体用紙容器や包装製品のシール加工に要するエネルギーコストがアップする。また、バイオマスポリエチレン樹脂のメルトマスフローレートが１０ｇ／ｍｉｎを超えると、シール部分にピンホールができるおそれがある。 Further, in this example, the melt mass flow rate of the biomass polyethylene resin forming the biomass polyethylene resin layer 3 is set to 4.5 g / 10 min to 10 g / 10 min.
When the melt mass flow rate of the biomass polyethylene resin forming the biomass polyethylene resin layer 3 is 4.5 g / 10 min to 10 g / min, the biomass polyethylene resin easily flows, and the biomass polyethylene resin layer 3 can be sealed at a low temperature, so that the laminate It is possible to reduce the energy cost required for sealing processing of, for example, a liquid paper container or a packaged product molded in 1.
If the melt mass flow rate of the biomass polyethylene resin is less than 4.5 g / 10 min, a high temperature is required for sealing the biomass polyethylene resin layer 3, and the laminate 1 is molded, for example, sealing a liquid paper container or a packaging product. The energy cost required for this will increase. Further, if the melt mass flow rate of the biomass polyethylene resin exceeds 10 g / min, pinholes may be formed in the seal portion.
　また、本例では、バイオマスポリエチレン樹脂層３を形成するバイオマスポリエチレン樹脂の曲げ弾性率は１５０ＭＰａ以下となるようにしている。バイオマスポリエチレン樹脂の曲げ弾性率は１５０ＭＰａを超えると、積層体１の曲げ反発が強くなり、例えば液体用紙容器や包装製品の成形を難しくする。
　バイオマスポリエチレン樹脂の曲げ弾性率は１５０ＭＰａ以下であれば特に限定されないが、１５０ＭＰａ以上であることが好ましい。バイオマスポリエチレン樹脂の曲げ弾性率が４０ＭＰａ未満であると、成形性は良いが強度が低下し、液体用紙容器や包装製品によっては必要な強度が得られない場合がある。 Further, in this example, the flexural modulus of the biomass polyethylene resin forming the biomass polyethylene resin layer 3 is set to 150 MPa or less. When the flexural modulus of the biomass polyethylene resin exceeds 150 MPa, the bending repulsion of the laminate 1 becomes strong, which makes it difficult to mold, for example, a liquid paper container or a packaged product.
The flexural modulus of the biomass polyethylene resin is not particularly limited as long as it is 150 MPa or less, but it is preferably 150 MPa or more. If the flexural modulus of the biomass polyethylene resin is less than 40 MPa, the moldability is good but the strength is lowered, and the required strength may not be obtained depending on the liquid paper container or the packaging product.
　また、本例では、バイオマスポリエチレン樹脂層３を形成するバイオマスポリエチレン樹脂には消臭剤が添加されている。バイオマスポリエチレン樹脂に添加されている消臭剤は、本例ではゼオライトやケイ酸塩等の多孔質物質や金属酸化物、酸性基や塩基性基を有する化学的吸着物質等が使用されている。バイオマスポリエチレン樹脂に添加される消臭剤は、マスターバッチにして添加される。バイオマスポリエチレン樹脂に添加される消臭剤の添加量は０．１～１０重量部であることが好ましい。消臭剤の添加量が０．１重量部未満であるとバイオマスポリエチレン樹脂のバイオマス原料の臭気が十分に消臭できない場合があり、また、１０重量部を超えると第１バイオマスポリエチレン樹脂層３の強度が低下するおそれがある。 Further, in this example, a deodorant is added to the biomass polyethylene resin forming the biomass polyethylene resin layer 3. As the deodorant added to the biomass polyethylene resin, a porous substance such as zeolite or silicate, a metal oxide, a chemically adsorbed substance having an acidic group or a basic group, or the like is used in this example. The deodorant added to the biomass polyethylene resin is added in a masterbatch. The amount of the deodorant added to the biomass polyethylene resin is preferably 0.1 to 10 parts by weight. If the amount of the deodorant added is less than 0.1 parts by weight, the odor of the biomass raw material of the biomass polyethylene resin may not be sufficiently deodorized, and if it exceeds 10 parts by weight, the odor of the first biomass polyethylene resin layer 3 may not be sufficiently deodorized. The strength may decrease.
　臭気バリア層４は、アルミ箔、金属蒸着フィルム、金属以外のセラミック蒸着フィルム、エチレンビニルアルコール共重合体（ＥＶＯＨ）、ポリ塩化ビニリデン（ＰＶＤＣ）、ポリエチレンテレフタレート（ＰＥＴ）ナイロン樹脂などが素材として使用される。 The odor barrier layer 4 is made of an aluminum foil, a metal vapor deposition film, a ceramic vapor deposition film other than metal, an ethylene vinyl alcohol copolymer (EVOH), polyvinylidene chloride (PVDC), polyethylene terephthalate (PET) nylon resin, or the like. NS.
　また、接着性樹脂層５は、接着性樹脂層５を形成する素材として接着性のある樹脂であればとくに限定されないが、臭気バリア層４の素材がアルミ箔の場合は、エチレン・メタクリル酸共重合樹脂（ＥＭＡＡ）が好適である。 The adhesive resin layer 5 is not particularly limited as long as it is an adhesive resin as a material for forming the adhesive resin layer 5, but when the material of the odor barrier layer 4 is aluminum foil, both ethylene and methacrylic acid are used. A polymer resin (EMAA) is suitable.
　また、ポリエチレンを主成分とする熱可塑性樹脂層６は、本例では、高圧法低密度ポリエチレン樹脂を主成分としている。 Further, in this example, the thermoplastic resin layer 6 containing polyethylene as a main component is mainly composed of a high-pressure method low-density polyethylene resin.
　以上のように構成された本例の積層体１によれば、バイオマスポリエチレン樹脂層３中のバイオマス度が７０％以上であるので、バイオマスポリエチレン樹脂層３を備える積層体１における化石燃料の使用量を大幅に削減することができることになり、地球温暖化対策や循環型社会の構築に十分に応えられる環境負荷の低減化が図れる。 According to the laminated body 1 of this example configured as described above, since the biomass degree in the biomass polyethylene resin layer 3 is 70% or more, the amount of fossil fuel used in the laminated body 1 including the biomass polyethylene resin layer 3 is used. It will be possible to significantly reduce the amount of fuel, and it will be possible to reduce the environmental load that can fully respond to global warming countermeasures and the construction of a sound-cycle society.
　また、本例では、バイオマスポリエチレン樹脂層３を形成するバイオマスポリエチレン樹脂のメルトマスフローレートは４．５ｇ／１０ｍｉｎ～１０ｇ／１０ｍｉｎであるので、流れやすく低温シールが可能となり、積層体１で成形される、例えば液体用紙容器や包装製品のシール加工に要するエネルギーコストの低減化が図れる。 Further, in this example, since the melt mass flow rate of the biomass polyethylene resin forming the biomass polyethylene resin layer 3 is 4.5 g / 10 min to 10 g / 10 min, it is easy to flow and low-temperature sealing is possible, and the laminate 1 is formed. For example, the energy cost required for sealing processing of liquid paper containers and packaging products can be reduced.
　また、本例では、バイオマスポリエチレン樹脂層３を形成するバイオマスポリエチレン樹脂のバイオマスポリエチレン樹脂層の曲げ弾性率は１５０ＭＰａ以下であるので、積層体１の曲げ反発が強すぎず、積層体１で成形される、例えば液体用紙容器や包装製品の加工性が良い。 Further, in this example, since the bending elasticity of the biomass polyethylene resin layer of the biomass polyethylene resin forming the biomass polyethylene resin layer 3 is 150 MPa or less, the bending repulsion of the laminated body 1 is not too strong, and the laminated body 1 is molded. For example, the processability of liquid paper containers and packaging products is good.
　図２は本発明に係るバイオマス由来の樹脂層を有する積層体の積層構造の第２例を示す説明図である。
　本例の積層体１は、紙基材層２の表面にバイオマス由来のポリエチレンと化石燃料由来のポリエチレンとを含んだバイオマスポリエチレン樹脂で形成されたバイオマスポリエチレン樹脂層３が積層され、紙基材層２の裏面に、バイオマス由来のポリエチレンと化石燃料由来のポリエチレンとを含んだバイオマスポリエチレン樹脂で形成されたバイオマスポリエチレン樹脂層７とバリア層４と接着性樹脂層５とポリエチレンを主成分とする熱可塑性樹脂層６とが、この順で積層されている。 FIG. 2 is an explanatory view showing a second example of a laminated structure of a laminated body having a biomass-derived resin layer according to the present invention.
In the laminate 1 of this example, a biomass polyethylene resin layer 3 formed of a biomass polyethylene resin containing polyethylene derived from biomass and polyethylene derived from fossil fuel is laminated on the surface of the paper base material layer 2, and the paper base material layer 1 is formed. On the back surface of 2, a biomass polyethylene resin layer 7 formed of a biomass polyethylene resin containing polyethylene derived from biomass and polyethylene derived from fossil fuel, a barrier layer 4, an adhesive resin layer 5, and a thermoplastic containing polyethylene as main components. The resin layer 6 is laminated in this order.
　本例のバイオマスポリエチレン樹脂層３は、第１例のバイオマスポリエチレン樹脂層３と同様であり、そして、バイオマスポリエチレン樹脂層７はバイオマスポリエチレン樹脂層３と同様であり、本例のバイオマスポリエチレン樹脂層３とバイオマスポリエチレン樹脂層７は、第１例のバイオマスポリエチレン樹脂層３の説明を援用する。 The biomass polyethylene resin layer 3 of this example is the same as the biomass polyethylene resin layer 3 of the first example, and the biomass polyethylene resin layer 7 is the same as the biomass polyethylene resin layer 3, and the biomass polyethylene resin layer 3 of this example. And the biomass polyethylene resin layer 7 refer to the description of the biomass polyethylene resin layer 3 of the first example.
　また、本例のバリア層４と接着性樹脂層５とポリエチレンを主成分とする熱可塑性樹脂層６は、第１例のバリア層４と接着性樹脂層５とポリエチレンを主成分とする熱可塑性樹脂層６と同様なので、それぞれ第１例の説明を援用する。
　また、本例の効果は、第１例と同様であり、第１例の説明を援用する。 Further, the barrier layer 4 of this example, the adhesive resin layer 5 and the thermoplastic resin layer 6 containing polyethylene as main components are thermoplastic having the barrier layer 4 of the first example, the adhesive resin layer 5 and polyethylene as main components. Since it is the same as the resin layer 6, the description of the first example is used for each.
Further, the effect of this example is the same as that of the first example, and the explanation of the first example is incorporated.
　図３は本発明に係るバイオマス由来の樹脂層を有する積層体の積層構造の第２例を示す説明図である。
　本例の積層体１は、紙基材層２の表面に、ポリエチレンを主成分とする熱可塑性樹脂層８が積層され、紙基材層２の裏面に、第２例と同様に、バイオマス由来のポリエチレンと化石燃料由来のポリエチレンとを含んだバイオマスポリエチレン樹脂で形成されたバイオマスポリエチレン樹脂層７とバリア層４と接着性樹脂層５とポリエチレンを主成分とする熱可塑性樹脂層６とが、この順で積層されている。
　また、本例の効果は、第１例と同様であり、第１例の説明を援用する。 FIG. 3 is an explanatory view showing a second example of a laminated structure of a laminated body having a biomass-derived resin layer according to the present invention.
In the laminated body 1 of this example, a thermoplastic resin layer 8 containing polyethylene as a main component is laminated on the surface of the paper base material layer 2, and the back surface of the paper base material layer 2 is derived from biomass as in the second example. A biomass polyethylene resin layer 7 formed of a polyethylene resin containing polyethylene and polyethylene derived from fossil fuel, a barrier layer 4, an adhesive resin layer 5, and a thermoplastic resin layer 6 containing polyethylene as a main component are formed. They are stacked in order.
Further, the effect of this example is the same as that of the first example, and the explanation of the first example is incorporated.
　次に、前記の積層体１を用いた液体用紙容器および包装製品の実施の形態の一例を詳細に説明する。
　本発明に係る液体用紙容器および包装製品は、前記の積層体１を用いて成形されるものであって、公知の成形工程に従って成形される。成形される液体用紙容器および包装製品の形状にあっては特に限定されるものではない。 Next, an example of the embodiment of the liquid paper container and the packaged product using the laminated body 1 will be described in detail.
The liquid paper container and the packaged product according to the present invention are molded using the above-mentioned laminate 1, and are molded according to a known molding process. The shape of the liquid paper container and the packaged product to be molded is not particularly limited.
　液体用紙容器および包装製品は、前記の積層体１を用いて成形されるので、地球温暖化対策や循環型社会の構築に十分に応えられる環境負荷の低減化を図った液体用紙容器および包装製品が得られる。そして、成形の際にシール加工に要するエネルギーコストが低いので、安価な液体用紙容器および包装製品が得られる。 Since the liquid paper container and packaging product are molded using the above-mentioned laminate 1, the liquid paper container and packaging product are designed to reduce the environmental load that can sufficiently respond to global warming countermeasures and the construction of a sound material-cycle society. Is obtained. Further, since the energy cost required for the sealing process during molding is low, inexpensive liquid paper containers and packaging products can be obtained.
１　積層体
２　紙基材層
３　バイオマスポリエチレン樹脂層
４　バリア層
５　ポリプロピレンを主成分とする接着性樹脂層
６　ポリエチレンを主成分とする熱可塑性樹脂層
７　バイオマスポリエチレン樹脂層
８　ポリエチレンを主成分とする熱可塑性樹脂層
                                                                         1 Laminate 2 Paper substrate layer 3 Biomass polyethylene resin layer 4 Barrier layer 5 Adhesive resin layer containing polypropylene as the main component 6 Thermoplastic resin layer containing polyethylene as the main component 7 Biomass polyethylene resin layer 8 Main component from polyethylene Thermoplastic resin layer

Claims (5)

  1. 　紙基材層の表裏面に、または表裏面のいずれか一方にバイオマス由来のポリエチレンと化石燃料由来のポリエチレンとを含んだバイオマスポリエチレン樹脂で形成されたバイオマスポリエチレン樹脂層を備える積層体であって、バイオマスポリエチレン樹脂層中のバイオマス度が７０％以上であることを特徴とするバイオマス由来の樹脂層を有する積層体。 A laminate having a biomass polyethylene resin layer formed of a biomass polyethylene resin containing biomass-derived polyethylene and fossil fuel-derived polyethylene on either the front or back surface of the paper base material layer or on either the front or back surface. Biomass A laminate having a biomass-derived resin layer, characterized in that the degree of biomass in the polyethylene resin layer is 70% or more.
  2. 　前記バイオマスポリエチレン樹脂層を形成するバイオマスポリエチレン樹脂のメルトマスフローレートは４．５ｇ／１０ｍｉｎ～１０ｇ／１０ｍｉｎであることを特徴とする請求項１に記載のバイオマス由来の樹脂層を有する積層体。 The laminate having a biomass-derived resin layer according to claim 1, wherein the melt mass flow rate of the biomass polyethylene resin forming the biomass polyethylene resin layer is 4.5 g / 10 min to 10 g / 10 min.
  3. 　前記バイオマスポリエチレン樹脂層の曲げ弾性率は１５０ＭＰａ以下であることを特徴とする請求項１に記載のバイオマス由来の樹脂層を有する積層体。 The laminate having a biomass-derived resin layer according to claim 1, wherein the biomass polyethylene resin layer has a flexural modulus of 150 MPa or less.
  4. 　請求項１～３のいずれか１項に記載の積層体を用いてなることを特徴とする液体用紙容器。 A liquid paper container using the laminate according to any one of claims 1 to 3.
  5. 　　請求項１～３のいずれか１項に記載の積層体を用いてなることを特徴とする包装製品。
                                                                                         A packaged product using the laminate according to any one of claims 1 to 3.
PCT/JP2021/012794 2020-03-30 2021-03-26 Laminate having biomass-derived resin layer, and liquid-use paper container and packaging product in which said laminate is used WO2021200625A1 (en)

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JP2020-061675 2020-03-30
JP2020-061674 2020-03-30
JP2020061675A JP2021160113A (en) 2020-03-30 2020-03-30 Laminate having biomass-derived resin layer, and paper container for liquid and packaging product using the same
JP2020061674A JP2021160112A (en) 2020-03-30 2020-03-30 Laminate having biomass-derived resin layer, and paper container for liquid and packaging product using the same

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004143311A (en) * 2002-10-25 2004-05-20 Toppan Printing Co Ltd Inorganic compound-containing resin composition, and laminate and packaging form using the same
JP2017196780A (en) * 2016-04-26 2017-11-02 大日本印刷株式会社 Laminate having polyolefin resin layer and packaged product having the same
JP2018001609A (en) * 2016-07-01 2018-01-11 大日本印刷株式会社 Laminate equipped with polyolefin resin layer and packing product equipped with the same
JP2019043147A (en) * 2018-11-29 2019-03-22 大日本印刷株式会社 Laminate for packaging product having biomass-derived resin layer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004143311A (en) * 2002-10-25 2004-05-20 Toppan Printing Co Ltd Inorganic compound-containing resin composition, and laminate and packaging form using the same
JP2017196780A (en) * 2016-04-26 2017-11-02 大日本印刷株式会社 Laminate having polyolefin resin layer and packaged product having the same
JP2018001609A (en) * 2016-07-01 2018-01-11 大日本印刷株式会社 Laminate equipped with polyolefin resin layer and packing product equipped with the same
JP2019043147A (en) * 2018-11-29 2019-03-22 大日本印刷株式会社 Laminate for packaging product having biomass-derived resin layer

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