WO2021220977A1 - ガスバリア積層体及び包装袋 - Google Patents

ガスバリア積層体及び包装袋 Download PDF

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Publication number
WO2021220977A1
WO2021220977A1 PCT/JP2021/016517 JP2021016517W WO2021220977A1 WO 2021220977 A1 WO2021220977 A1 WO 2021220977A1 JP 2021016517 W JP2021016517 W JP 2021016517W WO 2021220977 A1 WO2021220977 A1 WO 2021220977A1
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WO
WIPO (PCT)
Prior art keywords
gas barrier
layer
barrier laminate
coating liquid
packaging bag
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/016517
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English (en)
French (fr)
Japanese (ja)
Inventor
歩実 田中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toppan Inc
Original Assignee
Toppan Inc
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Filing date
Publication date
Application filed by Toppan Inc filed Critical Toppan Inc
Priority to CN202180027265.9A priority Critical patent/CN115443215A/zh
Priority to JP2022518027A priority patent/JPWO2021220977A1/ja
Priority to EP21796057.4A priority patent/EP4144521A4/en
Publication of WO2021220977A1 publication Critical patent/WO2021220977A1/ja
Priority to US17/967,031 priority patent/US12030286B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • B65D35/00—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
    • B65D35/02—Body construction
    • B65D35/04—Body construction made in one piece
    • B65D35/08—Body construction made in one piece from plastics material
    • 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
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • 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
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5861—Spouts
    • B65D75/5872—Non-integral spouts
    • B65D75/5883—Non-integral spouts connected to the package at the sealed junction of two package walls
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
    • C09D129/02—Homopolymers or copolymers of unsaturated alcohols
    • C09D129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • 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
    • 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
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/102—Oxide or hydroxide
    • B32B2264/1021—Silica
    • 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
    • B32B2307/7244—Oxygen 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/40—Closed containers
    • B32B2439/46—Bags

Definitions

  • the present invention relates to a gas barrier laminate and a packaging bag.
  • Packaging materials used for packaging foods, pharmaceuticals, etc. are required to have gas barrier properties in order to prevent the effects of oxygen, water vapor, and other gases that alter the contents.
  • a gas barrier laminate provided with an inorganic vapor deposition layer and a gas barrier layer containing a water-soluble polymer is generally used.
  • Patent Document 1 a thin-film vapor-deposited thin film layer is formed on a plastic base material, and a gas barrier layer is formed on the vapor-deposited thin film layer to exhibit gas barrier properties.
  • a gas barrier layer is formed on a plastic base material to exhibit gas barrier properties, and even when biaxially stretched polypropylene is used, excellent barrier properties are exhibited.
  • the present invention has been made in view of the above circumstances, and even when a base material containing polyolefin is used as the base material of the gas barrier laminate, the gas barrier property is excellent after the retort sterilization treatment and after the abuse test. It is an object of the present invention to provide a gas barrier laminate and a packaging bag having the above.
  • the present invention comprises a substrate layer containing a polyolefin, a metal oxide layer, and a gas barrier coating layer in this order, and the gas barrier coating layer comprises silicon alkoxide or a hydrolyzate thereof, a water-soluble polymer, and the like.
  • the content ratio a / b of the content of the silicon atom (a part by mass) and the content of the water-soluble polymer (b part by mass) in the silicon alkoxide or its hydrolyzate is 3/97 by mass ratio.
  • a gas barrier laminate having a mass ratio of 45/55 or less.
  • the content ratio a / b may be 5/95 or more in terms of mass ratio.
  • the gas barrier laminate may further include an anchor coat layer, and a metal oxide layer may be formed on the base material layer via the anchor coat layer.
  • the film thickness of the gas barrier coating layer may be 0.1 ⁇ m or more and 1 ⁇ m or less.
  • the present invention also provides a packaging bag containing the gas barrier laminate according to the present invention.
  • the present invention also provides a tube container containing the gas barrier laminate according to the present invention.
  • the gas barrier laminate, packaging bag and tube container having excellent gas barrier properties after the retort sterilization treatment and the abuse test. Can be provided.
  • FIG. 1 is a schematic cross-sectional view showing a gas barrier laminate according to an embodiment.
  • the gas barrier laminate 10 according to the embodiment includes a base material layer 1, a metal oxide layer 2, and a gas barrier coating layer 3 in this order.
  • the base film is a support film (base film) and contains polyolefin.
  • the base material layer may be a film made of polyolefin, and may further contain a film other than polyolefin. Further, the base material layer may include a plurality of layers of films.
  • the polyolefin may be a stretched film or a non-stretched film, but is preferably a stretched polyolefin, and examples thereof include biaxially stretched polyolefin. Further, a film derived from a recycled resin such as polypropylene recycled from industrial waste may be used.
  • the film thickness of the base material layer is not particularly limited, but is preferably a general film thickness of, for example, about 3 ⁇ m or more and 100 ⁇ m or less. When the base material layer contains a plurality of films, the total film thickness may be within the above range.
  • the base material may contain additives such as an antistatic agent, an ultraviolet absorber, a plasticizer, and a slip agent, if necessary. Further, the surface of the base material may be subjected to modification treatments such as corona treatment, frame treatment, plasma treatment, and easy adhesion treatment, or an anchor coat layer subjected to these treatments may be further provided. When further provided with an anchor coat layer, a metal oxide layer is formed on the base material layer via the anchor coat layer. That is, as shown in FIG. 2, the gas barrier laminate according to the embodiment includes a base material layer 1, an anchor coat layer 4, a metal oxide layer 2, and a gas barrier coating layer 3 in this order. The gas barrier laminate 20 is formed.
  • a flattening layer may be provided in order to reduce the unevenness of the base material layer.
  • Examples of the coating agent for the anchor coat layer and the flattening layer include acrylic resin, epoxy resin, acrylic urethane resin, polyester polyurethane resin, and polyether polyurethane resin.
  • acrylic urethane resin and polyester polyurethane resin are preferable from the viewpoint of heat resistance and interlayer adhesion strength.
  • the metal oxide layer is a layer containing a metal oxide, and may be a layer composed of one layer or a layer composed of two or more layers.
  • the constituent material of the metal oxide layer include metal oxides such as silicon oxide, aluminum oxide, magnesium oxide, and tin oxide.
  • the metal oxide may be selected from the group consisting of silicon oxide and aluminum oxide. Further, it may contain nitrogen or aluminum atoms.
  • the film thickness of the metal oxide layer is preferably 3 nm or more and 100 nm or less.
  • the film thickness is 3 nm or more, sufficient gas barrier properties can be obtained.
  • the film thickness is 100 nm or less, it is possible to suppress the occurrence of cracks due to the increase in curing shrinkage and suppress the decrease in gas barrier property. If the film thickness exceeds 100 nm, the cost tends to increase due to an increase in the amount of material used and a long film formation time, which is not preferable from an economical point of view.
  • the film thickness of the metal oxide layer is preferably 10 nm or more and 50 nm or less.
  • the metal oxide layer can be formed, for example, by vacuum film formation.
  • a physical vapor deposition method or a chemical vapor deposition method can be used.
  • the physical vapor deposition method include, but are not limited to, a vacuum deposition method, a sputtering method, and an ion plating method.
  • the chemical vapor deposition method include, but are not limited to, a thermal CVD method, a plasma CVD method, and an optical CVD method.
  • a resistance heating type vacuum deposition method an electron beam heating type vacuum deposition method, an induction heating type vacuum deposition method, a plasma chemical vapor deposition method (PECVD method) and the like are preferably used.
  • PECVD method plasma chemical vapor deposition method
  • the gas barrier coating layer has the effect of protecting the metal oxide layer and preventing the metal oxide from cracking during bending.
  • the gas barrier coating layer is a layer having a gas barrier property.
  • the gas barrier coating layer is formed through a step of forming a coating film containing the following components on the surface of the metal oxide layer.
  • A Silicon alkoxide or its hydrolyzate (hereinafter, may be referred to as component (A))
  • component (B) Water-soluble polymer (hereinafter, may be referred to as component (B))
  • the silicon alkoxide (A) may be a compound represented by the general formula Si (OR) n ( alkyl groups such as R: CH 3 , C 2 H 5 ), and may be, for example, tetramethoxysilane [Si (OCH 3 )). 4 ], tetraethoxysilane [Si (OC 2 H 5 ) 4 ] and the like can be mentioned.
  • the hydrolyzate of silicon alkoxide is a hydrolyzed product of the above-mentioned silicon alkoxide and has a silanol group.
  • silicon alkoxide is preferable because tetraethoxysilane is relatively stable in an aqueous solvent after hydrolysis.
  • Examples of the (B) water-soluble polymer include polyvinyl alcohol or a modified product thereof, polyvinylpyrrolidone, starch, methyl cellulose, carboxymethyl cellulose, sodium alginate and the like.
  • polyvinyl alcohol hereinafter, may be abbreviated as PVA
  • PVA polyvinyl alcohol
  • the PVA referred to here is generally obtained by saponifying polyvinyl acetate. For example, from the so-called partially saponified PVA in which several tens of percent of acetic acid groups remain, only a few percent of acetic acid groups remain. Complete PVA or the like can be used.
  • the modified product of PVA one in which an ethylene group having been introduced to the extent of maintaining water solubility in PVA may be used.
  • the gas barrier coating layer may be formed from a coating agent containing the component (A) and the component (B) as materials.
  • a solvent may be used as the coating agent, and examples of the solvent include water, alcohol, and a water / alcohol mixed solvent.
  • the gas barrier coating layer is obtained by coating a metal oxide layer with a solution obtained by preliminarily hydrolyzing the component (A) or the component (A) and a solution mixed with the component (B), and heating and drying the layer. And can be formed.
  • the content ratio a / b of the silicon atom content (a part by mass) in the component (A) and the content (b part by mass) of the component (B) is 3/97 or more and 45 / b in terms of mass ratio. It is 55 or less.
  • a / b By setting the content ratio a / b within the above range, even when a base material containing polyolefin is used as the base material of the gas barrier laminate, it has excellent gas barrier properties after the retort sterilization treatment and after the abuse test. It can be a gas barrier laminate.
  • the above a / b is 3/97 or more, the water resistance of the layer can be maintained, and when the content is filled with a liquid or when hot water sterilization treatment such as boiling and retort sterilization treatment is performed. It is possible to prevent the gas barrier layer from being dissolved and delaminated. Further, when the a / b is 45/55 or less, it is possible to prevent the layer from becoming too hard and to secure flexibility. From such a viewpoint, a / b is preferably 5/95 or more, and preferably 23/77 or less.
  • the content (a mass part) of the silicon atom in the component (A) is obtained by dividing the weight of the component (A) by the molar equal amount of the component (A), and the mass of the silicon atom (Si) (atomic weight "". It is a value multiplied by 28.1 ").
  • the gas barrier coating layer may contain, if necessary, other components in order to further improve the gas barrier property, in addition to the above-mentioned components (A) and (B).
  • an aqueous material is preferable.
  • other components include polyacrylic acid, polyurethane, acrylic resin, an aqueous dispersion of polyester resin, and a metal oxide using a metal precursor produced by the sol-gel method. When these other components are contained, they may be contained in the above coating agent.
  • leveling agents antifoaming agents, ultraviolet absorbers, antioxidants, silane coupling agents, metal chelating agents, etc. may be included in the coating agent, for example, if necessary.
  • a known method can be used as a method for applying the coating agent in the gas barrier coating layer.
  • a wet film forming method such as a gravure coater, a dip coater, a reverse coater, a wire bar coater, and a die coater can be used.
  • the film thickness of the gas barrier coating layer is preferably 0.1 ⁇ m or more and 1 ⁇ m or less, for example. If it is 0.1 ⁇ m or more, the layer does not become too thin and sufficient gas barrier properties can be obtained. Further, if it is 1 ⁇ m or less, the film is less likely to curl and is excellent in processing suitability.
  • the gas barrier laminate has not only excellent gas barrier properties, but also excellent gas barrier properties even after the retort sterilization treatment and after the abusiveness test. That is, the oxygen permeability of the gas barrier laminate at a temperature of 30 ° C. and a relative humidity of 70% is, for example, 10 cc / m 2 ⁇ day ⁇ atm or less, 5 cc / m 2 ⁇ day ⁇ atm or less, or 3 cc / m 2 ⁇ day ⁇ . Atm or less can be achieved.
  • the gas barrier laminate has an oxygen permeability of, for example, 10 cc / m 2 ⁇ day ⁇ atm or less, 5 cc / m 2 ⁇ day ⁇ atm or less, 1 cc / m 2 ⁇ , after retort sterilization treatment at 121 ° C. for 30 minutes. It is possible to achieve day ⁇ atm or less.
  • the oxygen permeability after performing the gelboflex test (abuse test) 5 times is 10 cc / m 2 ⁇ day ⁇ atm or less, 5 cc / m 2 ⁇ day ⁇ atm or less, 3 cc / m 2 ⁇ day ⁇ . Atm or less can be achieved.
  • the oxygen permeability after performing the gelboflex test (abuse test) 5 times is 11 cc / m 2 ⁇ day ⁇ atm or less, 10 cc / m 2. It is possible to achieve day ⁇ atm or less.
  • the packaging bag according to the present embodiment includes the above-mentioned gas barrier laminate. Specifically, as a method for manufacturing a packaging bag, a step of laminating a sealant layer on a gas barrier coating layer via an adhesive layer to manufacture a packaging material, and a process of manufacturing the packaging material into a bag shape. Have a process.
  • the gas barrier laminate has excellent heat resistance and water resistance. Therefore, by selecting the adhesive layer and the sealant layer having heat resistance, the packaging material can also have excellent heat resistance.
  • a packaging material having excellent heat resistance and water resistance can be applied to a packaging body to be subjected to heat sterilization treatment.
  • the sealant layer for example, a stretched or unstretched polypropylene film may be used.
  • the thickness of the sealant layer is not particularly limited, but may be, for example, 30 ⁇ m or more and 100 ⁇ m or less.
  • the adhesive layer adheres the gas barrier laminate and the sealant layer.
  • the adhesive constituting the adhesive layer include a polyurethane resin obtained by reacting a main agent such as a polyester polyol, a polyether polyol, an acrylic polyol, and a carbonate polyol with a bifunctional or higher functional isocyanate compound.
  • a main agent such as a polyester polyol, a polyether polyol, an acrylic polyol, and a carbonate polyol with a bifunctional or higher functional isocyanate compound.
  • the various polyols one type may be used alone or two or more types may be used in combination.
  • a carbodiimide compound, an oxazoline compound, an epoxy compound, a phosphorus compound, a silane coupling agent, or the like may be blended with the above-mentioned polyurethane resin for the purpose of promoting adhesion.
  • the adhesive layer may be one in which the polymer component is derived from biomass or one having biodegradability.
  • the coating amount of the adhesive layer may be, for example, 1 to 10 g / m 2 from the viewpoint of obtaining desired adhesive strength, followability, processability, and the like.
  • the packaging bag may be formed into a bag shape by folding one packaging material in half so that the sealant layers face each other and then heat-sealing the three sides to form a bag shape.
  • the bags may be formed into a bag shape by heat-sealing the four sides after stacking them so as to face each other.
  • the packaging bag can contain the contents such as foods and pharmaceuticals as the contents. Further, the packaging bag may have a shape having a bent portion (bent portion) such as a standing pouch.
  • the packaging bag according to the present embodiment can maintain high gas barrier properties even if it has a bent portion.
  • the packaging bag is a packaging bag with a spout.
  • the structure of the packaging bag with a spout is such that the spout is sandwiched between the two gas barrier laminates forming the packaging bag and fixed, or a hole is made in one side of the packaging bag and the spout is bonded and fixed.
  • the spout may be provided on the upper surface of the packaging bag, diagonally above the packaging bag, or on the side surface or bottom surface of the packaging bag.
  • a straw that reaches the bottom of the container may be provided in addition to the spout plug (so-called spout) so that the food can be sucked out by directly attaching the mouth.
  • FIG. 3 is a perspective view showing an embodiment of a packaging bag with a spout (gusset bag with a spout).
  • the packaging bag 100 with a spout shown in FIG. 3 has a structure in which the spout 104 is sandwiched and fixed to the seal portion 130 of the gas barrier laminate forming the packaging bag 140, and the spout 104 has a structure at the bottom of the container. A reachable straw 105 is provided. Further, the packaging bag 100 with a spout can be sealed by closing the spout cap 104a.
  • the packaging bag 140 constituting the packaging bag 100 with a spout may be a gusset bag that can stand on its own by expanding the lower part of the bag when the contents are filled and forming a downward swelling shape.
  • the gas barrier laminate of the present embodiment includes a base material layer containing polyolefin and a resin layer containing polyolefin, it is soft and maintains high gas barrier properties even after bending, so that it is suitably used as a squeeze pouch. be able to.
  • the squeezed pouch may be provided with a resealable spout, or the pouch may be cut off and a spout may be provided as a single-use pouch.
  • a packaging bag with a spout is a bag-in-box in which a bag (inner bag) for storing liquids such as soft drinks and alcoholic beverages is stored in a carton (outer box).
  • the gas barrier laminate of the present embodiment can be used for the bag-in-box bag, particularly for a bag body provided with a spout (tube) for pouring.
  • the gas barrier laminate of the present embodiment can be used for the body of the tube container.
  • the tube container is generally composed of a body portion made of a gas barrier laminate and a spout portion manufactured by extrusion molding.
  • the spout portion is composed of a spout portion for discharging the contents and a shoulder portion for guiding the contents held in the body portion to the spout portion.
  • FIG. 4 is a front view showing an embodiment of the tube container.
  • the tube container 500 shown in FIG. 4 includes a body portion 510 made of a gas barrier laminated body, a spout portion 520 attached to one end of the body portion 510, and a cap 530 attached to the spout portion 520.
  • the contents of the body portion 510 are such that the sealant layers of the gas barrier laminate are bonded to each other at the seal portion 513 and the bottom portion 511 located at the other end opposite to one end to which the spout portion 520 is attached is closed.
  • It is a tubular member formed so as to be able to accommodate the.
  • the spout portion 520 is composed of a spout portion 522 for discharging the contents and a shoulder portion 521 for guiding the contents held by the body portion 510 to the spout portion 522.
  • the cap 530 is a member that enables the opening of the spout portion 522 to be closed and opened.
  • the layer structure of the body of a laminated tube which is a type of tube container, includes, for example, from the innermost layer to the first resin layer (sealant layer), an adhesive layer, a gas barrier coating layer, a metal oxide layer, an anchor coat layer, and a base material.
  • It can be a layer, an adhesive layer, a second resin layer (sealant layer), or from the innermost layer to the second resin layer (sealant layer), an adhesive layer, a base material layer, an anchor coat layer, a metal oxide layer, and a gas barrier property. It can also be a coating layer, an adhesive layer, or a first resin layer (sealant layer).
  • the printing layer is provided on one surface of the second resin layer, and even if it is attached to the base material via the adhesive layer, it is provided on one surface of the first resin layer and attached to the gas barrier coating layer forming surface of the base material via the adhesive layer. You may match.
  • the first or second resin layer of the outermost layer is not used as a sealant layer, but as a resin layer similar to a base material layer not intended for heat sealing, and the end portion of the gas barrier laminate.
  • the body portion can also be formed into a tubular shape by adhering the sealant layers, which are the innermost layers of the (seal portion), to face each other.
  • sealant layers which are the innermost layers of the (seal portion)
  • high-density polyethylene or polypropylene resin can be selected as the material for the outermost layer, and the durability and cosmeticity of the tube container can be improved.
  • the sealant layer generally requires a thickness of 60 to 100 ⁇ m
  • a base material other than the sealant layer thickness is about 20 to 30 ⁇ m
  • the amount of plastic used in the entire tube container can be further reduced by not providing the second resin layer with the outermost layer as the base material layer.
  • the print layer may be formed on the outermost substrate and protected by an overprint varnish.
  • the thickness of the body laminate is thinner than that of a tube container having sealant layers on both sides of the laminate, so that the stress applied to the gas barrier layer during bending is relatively large.
  • the laminate of the present invention has a gas barrier property and maintains a high gas barrier property even after bending, so that it can be preferably used.
  • the shoulder portion may be provided perpendicularly to the body portion without providing a taper so that the contents can be squeezed out to the end.
  • the material of the spout portion and the cap of the tube container is not particularly limited, but the recyclability can be further improved by using the same resin as the base material layer.
  • an easily peelable film that closes the opening may be attached from the outside of the spout portion in order to perform sealing until the first opening.
  • the gas barrier laminate of the present embodiment can also be used as such an opening sealing lid material in combination with an easily peelable sealant.
  • the solution was mixed so as to be 45/15/40, and the hydrolyzed solution was mixed with a 5% aqueous solution of polyvinyl alcohol (trade name: Kuraray Poval 60-98, manufactured by Kuraray Co., Ltd., hereinafter also referred to as "PVA”).
  • the coating liquid (1) was obtained. At that time, the content ratio a / b of the silicon atom content (a part by mass) and the PVA content (b part by mass) in the coating liquid (1) is mixed so as to be 40/60 by mass ratio. bottom.
  • the content of silicon atoms was calculated by dividing the weight of TEOS by the molar equal amount of TEOS and multiplying by the mass of silicon atoms (Si) (atomic weight "28.1"). That is, the content of silicon atoms in 100 g of TEOS is 13.5 g.
  • the coating liquid (2) was obtained by the same operation as that of the coating liquid (1) except that the content ratios a / b were mixed so as to be 3/97.
  • the coating liquid (3) was obtained by the same operation as that of the coating liquid (1) except that the content ratios a / b were mixed so as to be 20/80.
  • the coating liquid (4) was obtained by the same operation as that of the coating liquid (1) except that the content ratios a / b were mixed so as to be 15/85.
  • the coating liquid (5) was obtained by the same operation as that of the coating liquid (1) except that the content ratios a / b were mixed so as to be 5/95.
  • the coating liquid (6) was obtained by the same operation as that of the coating liquid (1) except that the content ratios a / b were mixed so as to be 45/55.
  • the coating liquid (7) was obtained by the same operation as that of the coating liquid (1) except that the content ratios a / b were mixed so as to be 1/99.
  • the coating liquid (8) was obtained by the same operation as that of the coating liquid (1) except that the contents were mixed so that the content ratio a / b was 70/30.
  • the coating liquid (9) was obtained by the same operation as that of the coating liquid (1) except that the content ratios a / b were mixed so as to be 50/50.
  • Example 1 Biaxially stretched polypropylene film (OPP film, trade name: Pyrene P2161, manufactured by Toyo Boseki Co., Ltd., film thickness: 20 ⁇ m) is used as a base material, and is oxidized by an electron beam vacuum deposition method as a metal oxide layer on the corona-treated surface. Silicon was vapor-deposited to form a silicon oxide vapor-deposited film having a thickness of 25 nm. Further, the coating liquid (1) was applied by a bar coating method so as to have a cured film thickness of 1.5 ⁇ m, and dried in an oven at 60 ° C. for 1 minute to obtain a gas barrier laminate.
  • OPP film trade name: Pyrene P2161, manufactured by Toyo Boseki Co., Ltd., film thickness: 20 ⁇ m
  • Silicon was vapor-deposited to form a silicon oxide vapor-deposited film having a thickness of 25 nm.
  • the coating liquid (1) was applied by a bar coating method so as to have a cured film thickness of 1.5
  • Example 2 A biaxially stretched polypropylene film (OPP film, trade name: Pyrene P2161, manufactured by Toyobo Co., Ltd., film thickness: 20 ⁇ m) is used as a base material, and a polyester resin is 0.1 g / m 2 as an anchor coat layer on the corona-treated surface.
  • OPP film trade name: Pyrene P2161, manufactured by Toyobo Co., Ltd., film thickness: 20 ⁇ m
  • a polyester resin is 0.1 g / m 2 as an anchor coat layer on the corona-treated surface.
  • silicon oxide was deposited on the anchor coat layer as a metal oxide layer by an electron beam vacuum deposition method to form a silicon oxide vapor deposition film having a thickness of 25 nm.
  • the coating liquid (2) was applied by a bar coating method so as to have a cured film thickness of 0.8 ⁇ m, and dried in an oven at 60 ° C. for 1 minute to obtain a gas barrier laminate.
  • Example 3 A gas barrier laminate was obtained by the same operation as in Example 1 except that the coating liquid (3) was used instead of the coating liquid (1).
  • Example 4 A gas barrier laminate was obtained by the same operation as in Example 2 except that the coating liquid (4) was applied instead of the coating liquid (2) so as to have a cured film thickness of 2.0 ⁇ m.
  • Example 5 A gas barrier laminate was obtained by the same operation as in Example 2 except that the coating liquid (4) was used instead of the coating liquid (2).
  • Example 6 A gas barrier laminate was obtained by the same operation as in Example 2 except that the coating liquid (5) was used instead of the coating liquid (2).
  • Example 7 A gas barrier laminate was obtained by the same operation as in Example 2 except that the coating liquid (6) was used instead of the coating liquid (2).
  • a gas barrier laminate was obtained by the same operation as in Example 2 except that the coating liquid (8) was applied instead of the coating liquid (2) so as to have a cured film thickness of 1.5 ⁇ m.
  • Example 3 A gas barrier laminate was obtained by the same operation as in Example 2 except that the coating liquid (9) was used instead of the coating liquid (2).
  • the packaging material obtained from the gas barrier laminates of Examples 1 to 7 and Comparative Examples 1 to 3 and the upper surface of the place subjected to the retort sterilization treatment were cut into a size of 295 mm in length ⁇ 210 mm in width to prepare a sample.
  • the sample was attached to a fixed head of a gelboflex tester manufactured by Tester Sangyo Co., Ltd. so as to form a cylinder having a diameter of 87.5 mm ⁇ 210 mm.
  • the gas barrier laminate even when a material having inferior gas barrier properties of a plastic film alone, such as polyolefin containing biaxially stretched polypropylene, is used as the base material of the gas barrier laminate, the gas barrier is excellent even after the abusiveness test and the retort sterilization treatment. It becomes possible to provide a gas barrier laminate that maintains its properties.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)
PCT/JP2021/016517 2020-04-27 2021-04-23 ガスバリア積層体及び包装袋 Ceased WO2021220977A1 (ja)

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CN202180027265.9A CN115443215A (zh) 2020-04-27 2021-04-23 阻气层叠体以及包装袋
JP2022518027A JPWO2021220977A1 (https=) 2020-04-27 2021-04-23
EP21796057.4A EP4144521A4 (en) 2020-04-27 2021-04-23 GAS BARRIER LAMINATE AND PACKAGING BAGS
US17/967,031 US12030286B2 (en) 2020-04-27 2022-10-17 Gas barrier laminate and packaging bag

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024101161A1 (ja) * 2022-11-08 2024-05-16 Ｔｏｐｐａｎホールディングス株式会社 ガスバリアフィルム、包装フィルム、包装袋、及び包装製品
WO2024150763A1 (ja) * 2023-01-11 2024-07-18 Ｔｏｐｐａｎホールディングス株式会社 ガスバリア性積層体、包装容器および包装製品

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006062115A (ja) * 2004-08-25 2006-03-09 Toppan Printing Co Ltd レトルト用透明バリアフィルム
WO2016158794A1 (ja) * 2015-03-27 2016-10-06 凸版印刷株式会社 積層フィルム、及び包装袋
JP2018171796A (ja) * 2017-03-31 2018-11-08 大日本印刷株式会社 易開封性ガスバリア積層体、及び該積層体からなる易開封性ガスバリア包装材料とピロー包装袋
JP2018188568A (ja) * 2017-05-09 2018-11-29 凸版印刷株式会社 ガスバリア転写フィルム
JP2019119132A (ja) * 2018-01-05 2019-07-22 凸版印刷株式会社 ラミネートフィルムおよび成形品
JP2020055302A (ja) * 2018-09-28 2020-04-09 大日本印刷株式会社 紙容器用包装材料及び液体紙容器

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3949551B2 (ja) 2001-09-18 2007-07-25 株式会社トクヤマ ガスバリア性フィルム
JP6906278B2 (ja) 2016-07-04 2021-07-21 三井化学東セロ株式会社 バリア性積層フィルムおよび食品用包装体
WO2018181900A1 (ja) * 2017-03-31 2018-10-04 大日本印刷株式会社 ガスバリア積層体、及び該積層体からなるガスバリア包装材料とピロー包装袋
KR20200066330A (ko) * 2017-10-05 2020-06-09 도판 인사츠 가부시키가이샤 형광체 보호 필름, 파장 변환 시트 및 발광 유닛

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006062115A (ja) * 2004-08-25 2006-03-09 Toppan Printing Co Ltd レトルト用透明バリアフィルム
WO2016158794A1 (ja) * 2015-03-27 2016-10-06 凸版印刷株式会社 積層フィルム、及び包装袋
JP2018171796A (ja) * 2017-03-31 2018-11-08 大日本印刷株式会社 易開封性ガスバリア積層体、及び該積層体からなる易開封性ガスバリア包装材料とピロー包装袋
JP2018188568A (ja) * 2017-05-09 2018-11-29 凸版印刷株式会社 ガスバリア転写フィルム
JP2019119132A (ja) * 2018-01-05 2019-07-22 凸版印刷株式会社 ラミネートフィルムおよび成形品
JP2020055302A (ja) * 2018-09-28 2020-04-09 大日本印刷株式会社 紙容器用包装材料及び液体紙容器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4144521A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024101161A1 (ja) * 2022-11-08 2024-05-16 Ｔｏｐｐａｎホールディングス株式会社 ガスバリアフィルム、包装フィルム、包装袋、及び包装製品
WO2024150763A1 (ja) * 2023-01-11 2024-07-18 Ｔｏｐｐａｎホールディングス株式会社 ガスバリア性積層体、包装容器および包装製品

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CN115443215A (zh) 2022-12-06
JPWO2021220977A1 (https=) 2021-11-04

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