WO2022202168A1 - ガスバリア積層体及びそれを備える包装材 - Google Patents

ガスバリア積層体及びそれを備える包装材 Download PDF

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Publication number
WO2022202168A1
WO2022202168A1 PCT/JP2022/008936 JP2022008936W WO2022202168A1 WO 2022202168 A1 WO2022202168 A1 WO 2022202168A1 JP 2022008936 W JP2022008936 W JP 2022008936W WO 2022202168 A1 WO2022202168 A1 WO 2022202168A1
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WO
WIPO (PCT)
Prior art keywords
layer
gas barrier
laminate
thickness
paper
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Ceased
Application number
PCT/JP2022/008936
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English (en)
French (fr)
Japanese (ja)
Inventor
良樹 越山
純一 神永
裕美子 小島
里佳 石井
寛之 若林
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Toppan Inc
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Toppan Inc
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Filing date
Publication date
Application filed by Toppan Inc filed Critical Toppan Inc
Priority to US18/281,683 priority Critical patent/US20240165933A1/en
Priority to JP2023508872A priority patent/JPWO2022202168A1/ja
Priority to EP22774964.5A priority patent/EP4275882B1/en
Priority to CN202280019722.4A priority patent/CN116981565A/zh
Publication of WO2022202168A1 publication Critical patent/WO2022202168A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • 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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/02—Metal coatings
    • D21H19/08—Metal coatings applied as vapour, e.g. in vacuum
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing paper
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic coating
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/72—Density
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B32B2307/737—Dimensions, e.g. volume or area
    • B32B2307/7375—Linear, e.g. length, distance or width
    • B32B2307/7376—Thickness

Definitions

  • the present invention relates to a gas barrier laminate and a packaging material comprising the same.
  • Paper is originally a material with high air permeability. Therefore, in order to provide the gas barrier properties required for packaging materials using paper, methods such as laminating paper and a material with low air permeability, coating paper with a material with low air permeability, etc. be implemented. That is, it is necessary to form a gas barrier layer on the paper.
  • paper is inherently a material that retains folds (dead hold) and is characterized by being easy to process. For this reason, even when paper with a gas barrier layer formed by some method is processed into a pillow packaging bag, a three-side seal packaging bag, a gusset packaging bag, etc., which are packaging bags with sharp folds, the gas barrier properties of the packaging bag can be improved. should not decrease.
  • the gas barrier laminate described in Patent Document 1 is a gas barrier laminate having a water vapor barrier layer and a gas barrier layer in this order on at least one surface of a paper support.
  • the water vapor barrier layer contains a layered inorganic compound having an aspect ratio of 50 or more and a thickness of 200 nm or less, a cationic resin, and an anionic binder, and the content of the layered inorganic compound is based on 100 parts by mass of the anionic binder. It is 0.1 to 800 parts by mass, and the gas barrier layer is characterized by containing a water-soluble polymer.
  • One aspect of the present disclosure is to provide a gas barrier laminate capable of exhibiting sufficient gas barrier properties even after being folded, and a packaging material comprising the same.
  • a gas barrier laminate includes a paper substrate, a first resin layer, a vapor deposition layer, and a second resin layer that are laminated to each other, the paper substrate, the first resin layer, The deposited layer and the second resin layer are laminated in this order, the thickness of the paper substrate is 20 ⁇ m or more and 40 ⁇ m or less, and the density of the paper substrate is 0.8 g/cm 3 or more and 1.5 g/cm 3 or less. be.
  • the thickness and density of the paper substrate are set in the above numerical ranges, the entire gas barrier laminate is thinned, and the density of the paper substrate is increased, so that the thickness and density of the paper substrate are increased. It was possible to suppress the cracking of the gas barrier layer at the time.
  • the thickness of the paper base is 20 ⁇ m or more and 40 ⁇ m or less, the tensile stress applied to the gas barrier layer when the gas barrier laminate is folded can be reduced, so that cracking of the gas barrier layer can be suppressed.
  • the density of the paper substrate to 0.8 g/cm 3 or more and 1.5 g/cm 3 or less, the flatness of the deposited layer can be improved.
  • the initial gas barrier properties of the laminate can be improved.
  • unevenness is less likely to be provided on the surface of the deposited layer. For this reason, it becomes difficult to form a weak portion in the vapor deposition layer, so it can be said that increasing the density of the paper substrate contributes to suppressing cracking of the gas barrier layer. Therefore, even after the gas barrier laminate is folded, it is possible to exhibit sufficient gas barrier properties.
  • the second resin layer may be a layer containing a polyolefin resin having at least one of a carboxyl group, a salt of a carboxyl group, a carboxylic acid anhydride group, and a carboxylic acid ester. In this case, cracking of the deposited layer can be suppressed while exhibiting the vapor barrier property of the second resin layer.
  • the thickness of the deposited layer may be 30 nm or more and 100 nm or less.
  • the gas barrier laminate can exhibit good water vapor barrier properties and bending resistance.
  • the deposited layer may be an aluminum layer, a silicon oxide layer, or an aluminum oxide layer.
  • the gas barrier laminate can exhibit good water vapor barrier properties and bending resistance.
  • the thickness of the second resin layer may be 2 ⁇ m or more and 10 ⁇ m or less. In this case, it is possible to form a gas barrier laminate exhibiting good water vapor barrier properties and flexibility while suppressing manufacturing costs.
  • the thickness of the paper substrate may be 20 ⁇ m or more and 37 ⁇ m or less, and the thickness of the second resin layer may be 5 ⁇ m or more and 10 ⁇ m or less. In this case, even after the gas barrier laminate is bent, the gas barrier properties of the gas barrier laminate can be maintained satisfactorily.
  • the density of the paper substrate may be 1.0 g/cm 3 or more and 1.5 g/cm 3 or less.
  • the gas barrier laminate can exhibit good water vapor barrier properties.
  • a packaging material according to one aspect of the present disclosure may include a gas barrier laminate.
  • a gas barrier laminate capable of exhibiting sufficient gas barrier properties even after being folded, and a packaging material comprising the same.
  • FIG. 1 is a schematic cross-sectional view showing the layer structure of a gas barrier laminate according to one embodiment.
  • FIG. 2 is a schematic cross-sectional view for explaining a state in which the gas barrier layer is likely to crack when the paper layer is thick.
  • FIG. 3 is a schematic cross-sectional view for explaining a state in which the gas barrier layer is difficult to crack when the paper layer is thin.
  • FIG. 1 is a schematic cross-sectional view showing the layer structure of a laminate 10 according to one embodiment.
  • the laminate 10 is a gas barrier laminate comprising a paper substrate 1, a first resin layer 2, a vapor deposition layer 3, and a second resin layer 4.
  • the paper substrate 1, the first resin layer 2, the deposition layer 3, and the second resin layer 4 are laminated in order in the thickness direction of the laminate 10 (hereinafter simply referred to as "thickness direction").
  • at least the deposition layer 3 functions as a gas barrier layer in the laminate 10 .
  • the paper base material 1 is a layered base material that functions as the main body of the laminate 10 .
  • Materials contained in the paper base material 1 are not particularly limited. The material is appropriately selected according to the use of the packaging material including the laminate 10, for example.
  • the paper substrate 1 may be, for example, paper containing plant-derived pulp as a main component. Specific examples of paper include woodfree paper, special woodfree paper, coated paper, art paper, cast-coated paper, imitation paper, kraft paper, and glassine paper.
  • the paper substrate 1 may have a plurality of sheets of the above paper, or may have a plurality of types. In these cases, each paper can be stacked on top of each other.
  • the thickness of the paper base material 1 is 20 ⁇ m or more and 40 ⁇ m or less. Therefore, it can be said that the paper substrate 1 is relatively thin. When the thickness of the paper substrate 1 is 20 ⁇ m or more, the laminate 10 is less likely to be damaged unexpectedly. By setting the thickness of the paper substrate 1 to 40 ⁇ m or less, stress (compressive stress) applied to the deposited layer 3 and the like when the laminate 10 is folded can be suppressed. This is because the greater the thickness of the paper substrate 1, the greater the stress applied to the deposited layer 3 and the like.
  • the thickness of the paper substrate 1 may be 37 ⁇ m or less, 35 ⁇ m or less, 33 ⁇ m or less, 28 ⁇ m or more, or 30 ⁇ m or more.
  • the thickness of the paper base material 1 is determined by the method described in JIS P 8118:2014, for example.
  • the density of the paper base material 1 is, for example, 0.8 g/cm 3 or more and 1.5 g/cm 3 or less. Generally, the density of widely distributed paper (for example, copy paper) is about 0.7 g/cm 3 . Therefore, it can be said that the paper substrate 1 has a relatively high density. When the paper base material 1 has a density of 0.8 g/cm 3 or more, the smoothness of the first resin layer 2 and vapor deposition layer 3 located on the paper base material 1 can be improved. The density of the paper base material 1 is obtained by dividing the basis weight of the paper base material 1 by the thickness of the paper base material 1 .
  • the density of the paper substrate 1 may be 1.0 g/cm 3 or more, 1.10 g/cm 3 or more, 1.15 g/cm 3 or more, or 1.30 g/cm 3 or less. However, it may be 1.20 g/cm 3 or less, or 1.15 g/cm 3 or less.
  • the basis weight of the paper base material 1 is determined, for example, by the method described in JIS P 8124:2011.
  • the mass of the paper substrate 1 is, for example, 50% by mass or more, 70% by mass or more, or 80% by mass or more based on the entire laminate 10 . If the mass of the paper substrate 1 is 50% by mass or more, it can be said that the gas barrier laminate as a whole is made of paper. From the viewpoint of reducing the amount of plastic material used in forming the laminate 10 and recyclability, it is desirable that the mass of the paper in the laminate 10 is as large as possible.
  • the packaging material including the laminate 10 may be a paper container packaging bag. Paper containers and packaging bags are packages to which identification marks for paper containers and packaging are attached based on the Law for Promotion of Effective Utilization of Resources in Japan.
  • the first resin layer 2 is a layer (anchor coat layer) that serves as a base layer for the vapor deposition layer 3, and contains, for example, various resin compositions that are generally used as anchor coats for vapor deposition.
  • the resin composition is, for example, polyolefin, polyvinyl alcohol, ethylene-vinyl alcohol copolymer, epoxy resin, or the like. When the resin composition contains polyvinyl alcohol or the like, the resin composition can exert an oxygen barrier, so both the water vapor and oxygen barrier properties of the laminate 10 can be improved.
  • the coating amount and thickness of the first resin layer 2 are not particularly limited. The thickness of the first resin layer 2 is kept to the minimum necessary from the viewpoint of the stress applied to the deposited layer 3 and the like. The thickness of the first resin layer 2 is limited to the extent that it can function as an anchor coat for vapor deposition, for example.
  • the thickness of the first resin layer 2 is, for example, 2 ⁇ m or more and 10 ⁇ m or less.
  • the deposition layer 3 is a layer formed by a known method such as vacuum deposition, sputtering, chemical vapor deposition (CVD), or the like.
  • a vacuum deposition method may be used from the viewpoint of film formation speed and productivity.
  • Various metals, metal oxides, inorganic substances, and inorganic compounds can be used as the material of the vapor deposition layer 3 .
  • the vapor deposition layer 3 is, for example, any one of an aluminum layer, an aluminum oxide layer, and a silicon oxide layer from the viewpoint of the gas barrier performance of the vapor deposition layer, economic efficiency, ease of processing, and the like.
  • the thickness of the deposition layer 3 is 30 nm or more.
  • the thickness of the deposited layer 3 may be 40 nm or more, or may be 50 nm or more. If the deposited layer 3 is too thick, it tends to crack easily and the productivity during deposition tends to decrease. Therefore, the thickness of the vapor deposition layer 3 is 100 nm or less from the viewpoint of economy, damage prevention, and the like.
  • the thickness of the deposited layer 3 may be 80 nm or less, or may be 60 nm or less.
  • the second resin layer 4 functions as an overcoat layer that protects the vapor deposition layer 3 and covers the vapor deposition layer 3 .
  • the second resin layer 4 contacts and covers the deposition layer 3 .
  • a material of the second resin layer 4 for example, a material having a high affinity with the vapor deposition layer 3 is used like the first resin layer 2.
  • the second resin layer 4 containing the material include a layer containing a polyolefin resin having at least one of a carboxyl group, a salt of a carboxyl group, a carboxylic acid anhydride group, and a carboxylic acid ester.
  • Polyolefin is one of the materials with excellent flexibility. Therefore, by including polyolefin in the second resin layer 4, it is possible to exhibit the effect of suppressing cracking of the deposited layer 3 after bending. In addition, since the polyolefin to be crystallized is included in the second resin layer 4, the water vapor barrier property of the second resin layer 4 can be satisfactorily exhibited. Furthermore, the adhesion between the second resin layer 4 and the deposited layer 3 can be improved by the polyolefin resin containing a carboxyl group.
  • the thickness of the second resin layer 4 is, for example, 2 ⁇ m or more and 10 ⁇ m or less. As the second resin layer 4 becomes thicker, the deposited layer 3 approaches the center (neutral position) of the laminate 10 in the thickness direction. As a result, the stress applied to the vapor deposition layer 3 and the like when the laminate 10 is folded is easily relieved, and the vapor deposition layer 3 and the like are less likely to crack. Therefore, the bending resistance of the laminate 10 is improved (that is, the gas barrier properties of the laminate 10 are likely to be maintained even after bending). On the other hand, as the thickness of the second resin layer 4 increases, the manufacturing cost of the laminate 10 increases.
  • the thickness of the second resin layer 4 in one embodiment is 2 ⁇ m or more and 10 ⁇ m or less from the viewpoint of the balance between economy, gas barrier properties (especially water vapor barrier properties), and flex resistance.
  • the thickness of the second resin layer 4 may be 2.5 ⁇ m or more, 4 ⁇ m or more, 5 ⁇ m or more, 8 ⁇ m or less, or 7 ⁇ m or less.
  • FIG. 2 is a schematic cross-sectional view for explaining a state in which the gas barrier layer is likely to crack when the paper layer is thick.
  • FIG. 3 is a schematic cross-sectional view for explaining a state in which the gas barrier layer is difficult to crack when the paper layer is thin.
  • the thickness of the paper substrate 100 shown in FIG. 2 is greater than 40 ⁇ m, and the thickness of the paper substrate 1 shown in FIG. 3 is 20 ⁇ m or more and 40 ⁇ m or less.
  • the vapor deposition layer 3 is less likely to crack even after bending. Therefore, by setting the thickness of the paper substrate 1 to 20 ⁇ m or more and 40 ⁇ m or less, there is a tendency that cracks in the deposited layer 3 are less likely to occur.
  • the density of the paper base material 1 is 0.8 g/cm 3 or more and 1.5 g/cm 3 or less.
  • the flatness of the first resin layer 2 formed on the paper substrate 1 is improved.
  • the thickness of the deposited layer 3 formed on the first resin layer 2 can be stabilized. Therefore, the initial gas barrier property of the laminate 10 can also be improved.
  • the surface of the vapor deposition layer 3 is less likely to be uneven. When unevenness is provided in the deposited layer 3, cracks and defects tend to occur in the deposited layer 3 starting from the unevenness.
  • the thickness of the vapor deposition layer 3 is stabilized, so that the vapor deposition layer 3 is less likely to have weak portions. Therefore, damage to the vapor deposition layer 3 due to bending of the laminate 10 is less likely to occur. Therefore, even after being folded, the gas barrier properties of the laminate 10 can be maintained.
  • the mass of the paper substrate 1 is 50% by mass or more based on the entire laminate 10, it can be said that the laminate 10 as a whole is made of paper. For this reason, the laminate 10 has the crease retention characteristic of paper.
  • the second resin layer 4 is a layer containing a polyolefin resin having at least one of a carboxyl group, a salt of a carboxyl group, a carboxylic acid anhydride group, and a carboxylic acid ester.
  • Polyolefin is excellent in flexibility. Therefore, when the laminated body 10 is bent, the pressure applied to the vapor deposition layer 3 can be relieved, so that the effect of suppressing cracking of the vapor deposition layer 3 can be exhibited.
  • the second resin layer 4 contains crystallized polyolefin, the second resin layer 4 can exhibit good water vapor barrier properties. Furthermore, the adhesion between the second resin layer and the deposition layer 3 is improved by the polyolefin resin containing a carboxyl group.
  • the vapor deposition layer 3 has a thickness of 30 nm or more and 100 nm or less. Additionally, in one embodiment, the deposited layer 3 is either an aluminum layer, a silicon oxide layer, or an aluminum oxide layer. By using such a deposited layer 3, it is possible to achieve both the vapor barrier property and bending resistance of the laminate 10 at a higher level.
  • the thickness of the second resin layer 4 is 2 ⁇ m or more and 10 ⁇ m or less. As a result, it is possible to achieve both the vapor barrier property and the flex resistance of the laminate 10 at a high level while suppressing the cost.
  • the laminate 10 which can be said to be made of paper, according to one embodiment is used as a packaging material
  • excellent gas barrier properties can be exhibited even in a packaging form with folds. Therefore, it is possible to replace the plastic gas-barrier packaging material with the packaging material including the laminate 10, thereby contributing to the reduction of plastic waste.
  • gas barrier packaging that can be applied to bag-like packaging forms with folds (for example, three-sided seal, pillow packaging, gusset packaging, etc.). can form wood.
  • the resin used for the heat-sealable resin layer include polyolefin resins such as polyethylene and polypropylene, polyethylene terephthalate (PET), polyacrylonitrile (PAN), and the like.
  • gas barrier laminate according to the present disclosure will be specifically described based on the examples and comparative examples shown below.
  • Example 1 Glassine N manufactured by Nippon Paper Industries Co., Ltd. (thickness: 33 ⁇ m, density: 1.17) was used as the paper substrate. Subsequently, a polyolefin aqueous dispersion (an aqueous polyolefin dispersion containing Chemipearl S500 manufactured by Mitsui Chemicals, Inc.) is applied onto the paper substrate with a bar coater, and the polyolefin aqueous dispersion is dried in an oven to obtain a first A resin layer (average coating thickness: 4 ⁇ m) was formed.
  • a polyolefin aqueous dispersion an aqueous polyolefin dispersion containing Chemipearl S500 manufactured by Mitsui Chemicals, Inc.
  • an aluminum film (thickness: 50 nm), which is a vapor deposition film, was formed by vapor-depositing aluminum on the first resin layer by a vacuum vapor deposition method.
  • a polyolefin aqueous dispersion (an aqueous polyolefin dispersion containing Chemipearl S500 manufactured by Mitsui Chemicals, Inc.) is applied onto the vapor-deposited film with a bar coater, and then the polyolefin aqueous dispersion is dried in an oven to obtain a second resin.
  • a layer (average coating thickness: 5 ⁇ m) was formed.
  • a laminate was formed in which the paper substrate, the first resin layer, the vapor deposition layer, and the second resin layer were laminated in this order.
  • a laminate that has not been bent and deformed (initial laminate), a laminate that has been folded back to its original state (valley folded laminate), and a laminate that has been returned to its original shape after being mountain-folded (Mountain folded laminate) was prepared.
  • the valley-fold laminate corresponds to a laminate folded in half so that the second resin layer is positioned on the innermost side.
  • the mountain-fold laminate corresponds to a laminate folded in two so that the second resin layer is positioned on the outermost side.
  • the gas-barrier laminate was folded in two by making a crease while rotating a 1500 g roller once at a speed of 300 mm/min.
  • initial indicates the measurement results of the water vapor permeability of the initial laminate
  • "valley fold” in Table 1 indicates the measurement results of the water vapor permeability of the valley fold laminate
  • “mountain fold” in Table 1 ” indicates the measurement results of the water vapor transmission rate of the mountain fold laminate.
  • Example 2 A laminate having the same materials and layer structure as in Example 1 was prepared and evaluated in the same manner as in Example 1, except that Crystep manufactured by Oji F-Tex Co., Ltd. (thickness: 35 ⁇ m, density: 1.07) was used as the paper base material. .
  • Example 3 A laminate with the same material and layer structure as in Example 1 was prepared, except that thick glassine manufactured by Oji F-Tex Co., Ltd. (thickness: 28 ⁇ m, density: 1.06) was used as the paper base material, and evaluated in the same manner. did.
  • Example 4 A laminate having the same materials and layer structure as in Example 1 was prepared and evaluated in the same manner as in Example 1, except that Solid Lucent manufactured by UPM (thickness: 39 ⁇ m, density: 1.04) was used as the paper substrate.
  • Example 5 A laminate having the same materials and layer structure as in Example 1 was prepared and evaluated in the same manner as in Example 1, except that A Ginrei N (thickness: 37 ⁇ m, density: 0.81) manufactured by Nippon Paper Industries Co., Ltd. was used as the paper base material. .
  • Example 6 Except for using PVA (polyvinyl alcohol, degree of polymerization: 500, average coating thickness: 4 ⁇ m) as the first resin layer, a laminate having the same material and layer structure as in Example 1 was prepared and evaluated in the same manner. .
  • PVA polyvinyl alcohol, degree of polymerization: 500, average coating thickness: 4 ⁇ m
  • Example 7 A laminate having the same materials and layer structure as in Example 1 was prepared, except that Maxieve C-93AT (epoxy-based adhesive resin, average coating thickness: 4 ⁇ m) manufactured by Mitsubishi Gas Chemical Co., Ltd. was used as the first resin layer. , was similarly evaluated.
  • Maxieve C-93AT epoxy-based adhesive resin, average coating thickness: 4 ⁇ m
  • Example 8 A laminate having the same materials and layer structure as in Example 1 was prepared and evaluated in the same manner as in Example 1, except that a silicon oxide layer (thickness: 30 nm) was used as the deposited layer.
  • Example 9 A laminate having the same materials and layer structure as in Example 1 was prepared, except that an aluminum oxide layer (thickness: 30 nm) was used as the vapor deposition layer, and evaluated in the same manner.
  • Example 10 A laminate having the same materials and layer structure as in Example 1 was prepared, except that the average coating thickness of the second resin layer was 8 ⁇ m, and evaluated in the same manner.
  • Example 11 A laminate having the same materials and layer structure as in Example 1 was prepared, except that the average coating thickness of the second resin layer was 2.5 ⁇ m, and evaluated in the same manner.
  • Example 1 A laminate having the same material and layer structure as in Example 1 was prepared and evaluated in the same manner as in Example 1 except that Ryuo Coat manufactured by Oji Paper Co., Ltd. (thickness: 46 ⁇ m, density: 1.12) was used as the paper base material. .
  • Example 2 A laminate having the same materials and layer structure as in Example 1 was prepared and evaluated in the same manner as in Example 1 except that Tokucomo S manufactured by Fuji Kako Co., Ltd. (thickness: 47 ⁇ m, density: 1.11) was used as the paper base material. .
  • Example 3 A laminate having the same materials and layer structure as in Example 1 was prepared and evaluated in the same manner as in Example 1, except that Solid Strong (thickness: 66 ⁇ m, density: 0.88) manufactured by UPM was used as the paper substrate.
  • Example 4 A laminate having the same materials and layer structure as in Example 1 was prepared and evaluated in the same manner as in Example 1, except that Enza HS manufactured by APP Co., Ltd. (thickness: 64 ⁇ m, density: 0.78) was used as the paper substrate.
  • the initial water vapor permeability is 10 g or more, or the degree of deterioration due to bending is twice or more. Met.
  • the water vapor transmission rate of the laminates of Examples in which the density of the paper substrate was 1.0 g/cm 3 or more was 5 g or less even after bending.
  • the degree of flexing deterioration of the laminates of Examples in which the thickness of the paper substrate was 37 ⁇ m or less and the average coating thickness of the second resin layer was 5 ⁇ m or more was 1.2 or less.
  • the gas barrier laminate according to one aspect of the present disclosure can be used as a packaging material as it is. It can also be processed. Even when it is used as a packaging bag, it can be used as a substitute material for gas barrier packaging materials using conventional plastic materials, because the gas barrier properties of the folded portion are less deteriorated.

Landscapes

  • Laminated Bodies (AREA)
  • Wrappers (AREA)
PCT/JP2022/008936 2021-03-22 2022-03-02 ガスバリア積層体及びそれを備える包装材 Ceased WO2022202168A1 (ja)

Priority Applications (4)

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US18/281,683 US20240165933A1 (en) 2021-03-22 2022-03-02 Gas barrier laminate and packaging material provided therewith
JP2023508872A JPWO2022202168A1 (https=) 2021-03-22 2022-03-02
EP22774964.5A EP4275882B1 (en) 2021-03-22 2022-03-02 Gas barrier laminate and packaging material containing it
CN202280019722.4A CN116981565A (zh) 2021-03-22 2022-03-02 气体阻隔层叠体以及具备该气体阻隔层叠体的包装材料

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JP2021-047172 2021-03-22
JP2021047172 2021-03-22

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WO2023120287A1 (ja) * 2021-12-20 2023-06-29 凸版印刷株式会社 ガスバリア積層体及びその製造方法、並びに、包装袋
JP2023091151A (ja) * 2021-12-20 2023-06-30 凸版印刷株式会社 ガスバリア積層体及び包装袋
JP2023091152A (ja) * 2021-12-20 2023-06-30 凸版印刷株式会社 ガスバリア積層体及び包装袋
WO2024085092A1 (ja) * 2022-10-19 2024-04-25 Ｔｏｐｐａｎホールディングス株式会社 積層体及び包装袋

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WO2023120287A1 (ja) * 2021-12-20 2023-06-29 凸版印刷株式会社 ガスバリア積層体及びその製造方法、並びに、包装袋
JP2023091151A (ja) * 2021-12-20 2023-06-30 凸版印刷株式会社 ガスバリア積層体及び包装袋
JP2023091152A (ja) * 2021-12-20 2023-06-30 凸版印刷株式会社 ガスバリア積層体及び包装袋
JP7342933B2 (ja) 2021-12-20 2023-09-12 凸版印刷株式会社 ガスバリア積層体及び包装袋
JP7342934B2 (ja) 2021-12-20 2023-09-12 凸版印刷株式会社 ガスバリア積層体及び包装袋
WO2024085092A1 (ja) * 2022-10-19 2024-04-25 Ｔｏｐｐａｎホールディングス株式会社 積層体及び包装袋
JP7537644B1 (ja) * 2022-10-19 2024-08-21 Ｔｏｐｐａｎホールディングス株式会社 積層体及び包装袋
JP2024144753A (ja) * 2022-10-19 2024-10-11 Ｔｏｐｐａｎホールディングス株式会社 積層体
EP4596238A4 (en) * 2022-10-19 2026-01-21 Toppan Holdings Inc MULTI-LAYER BODY AND PACKAGING BAG
AU2023363440B2 (en) * 2022-10-19 2026-03-19 Toppan Holdings Inc. Multilayer body and packaging bag
JP7848835B2 (ja) 2022-10-19 2026-04-21 Ｔｏｐｐａｎホールディングス株式会社 積層体

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US20240165933A1 (en) 2024-05-23
EP4275882A1 (en) 2023-11-15
CN116981565A (zh) 2023-10-31

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