WO2023176817A1 - 積層フィルムおよび包装体 - Google Patents
積層フィルムおよび包装体 Download PDFInfo
- Publication number
- WO2023176817A1 WO2023176817A1 PCT/JP2023/009812 JP2023009812W WO2023176817A1 WO 2023176817 A1 WO2023176817 A1 WO 2023176817A1 JP 2023009812 W JP2023009812 W JP 2023009812W WO 2023176817 A1 WO2023176817 A1 WO 2023176817A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- film
- laminated
- layer
- sealant
- laminated film
- 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
Links
Images
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
- 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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
-
- 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
- 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
- B65D75/008—Standing pouches, i.e. "Standbeutel"
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/246—All polymers belonging to those covered by groups B32B27/32 and B32B27/30
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
-
- 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
-
- 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
-
- 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 laminated film and a package.
- This application claims priority based on Japanese Patent Application No. 2022-042467 filed in Japan on March 17, 2022, the contents of which are incorporated herein.
- Paragraph 0010 of Patent Document 1 states that low density polyethylene, linear low density polyethylene is used as a film conventionally used for packaging bags on a base material such as biaxially oriented polypropylene, biaxially oriented polyamide, or biaxially oriented polyester.
- a laminated film in which polyolefin resins such as , ethylene-vinyl acetate copolymer, and polypropylene are laminated as a sealant layer is described.
- metal layers, ceramic layers, ethylene-vinyl alcohol copolymer (EVOH), etc. may be laminated in order to improve the barrier properties of the laminated film.
- Patent Document 2 describes a first layer (surface layer) and a fifth layer (back layer) consisting of an olefin resin layer, a third layer containing EVOH, and a second layer and a fourth layer consisting of an adhesive resin layer.
- a barrier coextruded multilayer sealant film is described, which is laminated by coextrusion in the order of "first layer/second layer/third layer/fourth layer/fifth layer".
- JP2013-39932A Japanese Patent Application Publication No. 2008-81525
- the laminated film used in conventional packaging bags has a heat-adhesive resin (sealant) layer such as polyethylene (PE) on the inner surface, and a base material such as polyethylene terephthalate (PET), which has higher heat resistance than the sealant, on the outer surface. Laminated. When thermally adhering the laminated films, the inner surfaces of the laminated films are joined by melting the sealant.
- a heat-adhesive resin such as polyethylene (PE) on the inner surface
- PET polyethylene terephthalate
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a laminated film and a package that can achieve both recyclability and barrier properties.
- the laminated film according to aspect 1 of the present invention has a barrier resin layer formed from an ethylene-vinyl alcohol copolymer (EVOH), and a polyethylene resin layer adjoined by coextrusion on at least one side of the barrier resin layer. It is characterized in that a coextruded film and a sealant layer are laminated.
- EVOH ethylene-vinyl alcohol copolymer
- the polyethylene resin layer may be adjacent to both sides of the barrier resin layer by coextrusion.
- the barrier resin layer of aspect 1 or 2 may have a thickness of 1 to 5 ⁇ m.
- the coextruded film of any one of Embodiments 1 to 3 may be used as the base material.
- the coextruded film may be laminated between the sealant layer and the base material made of polyethylene resin.
- a layer made of a polyethylene resin may be laminated between the sealant layer and the base material made of the coextruded film.
- the coextruded film may be unstretched.
- aspect 8 of the present invention is a package formed from the laminated film of any one of aspects 1 to 7.
- a ninth aspect of the present invention is a standing pouch formed from the laminated film according to any one of aspects 1 to 7.
- the standing pouch may have a hollow container body, and the container body may be formed from two body films as a body material and a bottom film as a bottom material. Both the trunk film and the bottom film may be formed from the laminated film according to any one of aspects 1 to 7.
- a tenth aspect of the present invention is a standing pouch in which only the bottom material is formed from the laminated film of any one of aspects one to seven.
- the thickness of the coextruded film does not need to be as thick as the multilayer sealant film
- the thickness of the barrier resin layer formed from EVOH can be reduced, which improves recyclability. It is possible to achieve both barrier properties. Since the amount of relatively expensive EVOH used can be reduced, costs can be lowered. Since the sealant layer does not contain EVOH, the degree of freedom in designing the sealant layer increases.
- FIG. 1 is a cross-sectional view illustrating the laminated film of the first embodiment.
- FIG. 3 is a cross-sectional view illustrating a laminated film of a second embodiment.
- FIG. 1 is a front view showing a standing pouch as an embodiment of the packaging bag of the present invention.
- the laminated film 10 of the first embodiment includes a coextruded film 12 in which polyethylene resin layers 14 are laminated adjacently by coextrusion on both sides of a barrier resin layer 15 made of EVOH.
- This is a multilayer laminated film 10 in which a sealant layer 11 and a sealant layer 11 are laminated.
- the coextruded film 12 may be the base material of the laminated film 10.
- a coextruded film 12 in which a polyethylene resin layer 14 is laminated adjacently by coextrusion on at least one side of a barrier resin layer 15 made of EVOH is used. May be used.
- the polyethylene resin layer 14 may be laminated on one side of the barrier resin layer 15, on the side closer to the sealant layer 11, or on the side farther from the sealant layer 11. good.
- the laminated film 20 of the second embodiment is a coextruded film 22 in which polyethylene resin layers 24 are laminated adjacently on both sides of a barrier resin layer 25 made of EVOH by coextrusion.
- This is a multilayer laminated film 20 in which a sealant layer 21 and a base film 27 are laminated.
- the base film 27 becomes the base material of the laminated film 20.
- the base film 27 is preferably made of polyethylene resin.
- a coextruded film 22 in which a polyethylene resin layer 24 is laminated adjacently by coextrusion on at least one side of a barrier resin layer 25 made of EVOH. May be used.
- the polyethylene resin layer 24 may be laminated on one side of the barrier resin layer 25, on the side closer to the sealant layer 21, or on the side farther from the sealant layer 21. good.
- the polyethylene resin used for the sealant layers 11, 21, the polyethylene resin layers 14, 24, the base film 27, etc. may be an ethylene homopolymer, or a copolymer mainly composed of ethylene. ) is also fine.
- Monomers other than ethylene (comonomers) include ⁇ -olefins such as 1-butene, 1-hexene, and 1-octene, cyclic olefins such as norbornene, and vinyl monomers such as vinyl acetate, vinyl chloride, and acrylic acid. Or two or more types can be mentioned. When using a comonomer in the polyethylene resin, the comonomer may be one type or two or more types.
- the proportion of ethylene in the constituent monomers of the polyethylene resin is preferably 50% by weight or more, and may be, for example, 80 to 100% by weight.
- the ethylene or comonomer used in the polyethylene resin may be a compound derived from fossil resources such as petroleum, or may be a compound derived from biomass such as plants.
- the resin contained in the polyethylene resin layer may be only polyethylene resin. Recycled polyethylene may be used as the polyethylene resin.
- the polyethylene resin layers 14 and 24 of the coextruded films 12 and 22 may contain polyethylene resin in an amount of 50% by weight or more, and further, in a proportion of 80 to 100% by weight.
- the resin contained in the polyethylene resin layers 14 and 24 may be only polyethylene resin.
- the material forming the polyethylene resin layers 14 and 24 may be one type of polyethylene resin or a blend of two or more types of polyethylene resins.
- As the polyethylene resin any of low density polyethylene (LDPE), linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), etc. can be used.
- the EVOH forming the barrier resin layers 15 and 25 can be obtained by copolymerizing ethylene with a vinyl ester monomer, saponifying the resulting copolymer, and converting vinyl ester units into vinyl alcohol units.
- vinyl ester monomers include vinyl carboxylate esters such as vinyl formate, vinyl acetate, vinyl butyrate, and vinyl benzoate.
- the barrier properties of EVOH improve as the proportion of vinyl alcohol units increases, but the moisture resistance decreases, so it is preferable to have an appropriate ethylene content.
- the ethylene content of EVOH is, for example, 20 to 60 mol%.
- the degree of saponification of EVOH is not limited to 100 mol%, but is preferably 80 mol% or more, for example.
- the barrier resin layers 15 and 25 may contain EVOH in a proportion of 50% by weight or more, and further, in a proportion of 80 to 100% by weight.
- the resin contained in the barrier resin layers 15 and 25 may be only EVOH.
- the material forming the barrier resin layers 15 and 25 may be one type of EVOH or a blend of two or more types of EVOH.
- the total thickness of the coextruded films 12 and 22 is not particularly limited, but may be, for example, about 10 to 50 ⁇ m.
- the thickness of the barrier resin layers 15 and 25 is preferably 1 to 5 ⁇ m, more preferably 2 to 3 ⁇ m.
- the thickness of the polyethylene resin layers 14 and 24 is, for example, about 4 to 24 ⁇ m.
- the coextruded films 12 and 22 can reduce the thickness of the barrier resin layer 15 formed from EVOH, thereby reducing the amount of relatively expensive EVOH used. Thereby, the material cost of the laminated films 10 and 20 can be reduced.
- the laminated films 10 and 20 of the embodiment can have a structure in which the sealant layers 11 and 21 do not contain EVOH. Therefore, the degree of freedom in designing the sealant layers 11 and 21 can be improved.
- the sealant layers 11 and 21 are made of sealant resin.
- sealant resin polyethylene resins with relatively low density such as linear low density polyethylene (LLDPE) and low density polyethylene (LDPE), or unstretched polyethylene resins are preferred.
- the sealant layers 11 and 21 may be formed from one type of polyethylene resin, or may contain two or more types of polyethylene resin.
- Examples of two or more types of polyethylene resins include blending linear low density polyethylene (LLDPE), low density polyethylene (LDPE), etc. with high density polyethylene (HDPE), medium density polyethylene (MDPE), etc. .
- the thickness of the sealant layers 11 and 21 is not particularly limited, but may be, for example, about 50 to 180 ⁇ m.
- the sealant layers 11 and 21 may be a single layer sealant film or a multilayer sealant film. Since the sealant layers 11 and 21 do not contain EVOH, an increase in cost can be avoided even if the sealant layers 11 and 21 have a sufficient thickness.
- a multilayer sealant film can be formed by laminating two or more layers of film-like sealant resin by a coextrusion method, an extrusion lamination method, a sandwich lamination method, a heat lamination method, or the like.
- polyethylene resin can be employed for each layer.
- examples include a three-layer structure in which high-density polyethylene (HDPE), medium-density polyethylene (MDPE), etc. are sandwiched between linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), etc. .
- the base film 27 may be a stretched polyethylene resin film or an unstretched polyethylene resin film.
- Examples of the base film 27 include polyethylene resins having relatively high density, such as medium density polyethylene (MDPE) and high density polyethylene (HDPE).
- MDPE medium density polyethylene
- HDPE high density polyethylene
- the base film 27 may be formed from one type of polyethylene resin, or may contain two or more types of polyethylene resin.
- the thickness of the base film 27 is not particularly limited, but may be, for example, about 10 to 50 ⁇ m.
- the resin layer may contain additives other than resin.
- additives include, but are not limited to, antioxidants, lubricants, antiblocking agents, flame retardants, ultraviolet absorbers, light stabilizers, antistatic agents, colorants, crosslinking agents, and the like.
- the additive may be a component that is compatible with the resin or a component that is not compatible with the resin.
- the sealant layer 11 and coextruded film 12 may be bonded via an adhesive layer 13 by dry lamination or the like.
- the adhesive layer 26 is formed between the coextruded film 22 and the base film 27 by dry lamination or the like. They may also be joined together.
- At least one of the films may be subjected to surface treatment such as ozone treatment, plasma treatment, corona treatment, discharge treatment, flame treatment, or the like.
- the adhesive layers 13 and 26 may be formed from an adhesive or an anchor coating agent.
- Materials for forming the adhesive layers 13 and 26 include, but are not particularly limited to, urethane compounds, epoxy compounds, isocyanate compounds, polyethyleneimine, organic titanium compounds such as titanium alkoxide, and the like.
- the thickness of the adhesive layers 13 and 26 is, for example, about 0.1 to 10 ⁇ m, about 1 to 6 ⁇ m, or about 3 to 4 ⁇ m.
- the sealant layer 21 and coextruded film 22 may be joined via an extruded resin layer 23 by extrusion lamination or the like.
- the extruded resin layer 23 may be formed from polyethylene resin.
- the extruded resin layer 23 may be extruded downward using a molding machine such as a T-die.
- a roll member for guiding the films to be bonded may be arranged below the molding machine.
- the temperature of the film may be adjusted using a cooling roll, a heating roll, or the like as the roll member.
- the film may be pressed against the extruded resin layer 23 using a nip roll or the like.
- FIG. 1 shows an example in which a sealant layer 11 and a coextruded film 12 are bonded via an adhesive layer 13 in a laminated film 10 having a coextruded film 12 as a base material.
- the sealant layer 21 and the coextruded film 22 may be bonded via the adhesive layer 13. .
- FIG. 2 shows an example in which a sealant layer 21 and a coextruded film 22 are joined via an extruded resin layer 23 in a laminated film 20 having a base film 27 as a base material.
- a laminated film 10 having a coextruded film 12 as a base material as shown in FIG. good.
- the adhesive layer 26 and the base film 27 may be omitted from the laminated film 20 shown in FIG. 2 .
- a printed layer, a coating layer, a coat layer, etc. may be formed on at least one surface of the coextruded films 12 and 22, the base film 27, or other resin film.
- the laminated films 10 and 20 are not limited to the sealant layers 11 and 21 or the base film 27, and may be laminated with one or more desired polyethylene resin films.
- a layer made of polyethylene resin may be laminated between the sealant layers 11 and 21 and the coextruded films 12 and 22.
- the layer made of polyethylene resin may be the extruded resin layer 23 described above, or may be a resin film laminated by dry lamination or the like.
- Two or more coextruded films 12 and 22 may be laminated.
- the coextruded films 12 and 22 may be unstretched.
- unstretched coextruded films 12, 22 and stretched coextruded films 12, 22 may be used together. . By laminating unstretched films, tear strength can be improved.
- the total amount of polyethylene resin is 95% by weight or more and the total amount of materials other than polyethylene resin is 5% by weight or less with respect to the total weight of the laminated films 10 and 20 of the embodiment.
- the laminated films 10 and 20 can realize a monomaterial material of polyethylene resin.
- materials other than polyethylene resin include EVOH, an adhesive layer, a printing layer, a coating layer such as varnish, and a coating layer.
- the laminated films 10 and 20 of the embodiment can be used for producing a package. It is sufficient that at least one member of the package is formed from the laminated films 10 and 20 of the embodiment.
- the packaging body include packaging bags such as pouches and bags, tubes, containers, sleeve packaging, strip packaging, and lidding materials. Specific examples of packaging bags include three-sided sealed bags, four-sided sealed bags, pillow bags, gusseted bags, and standing pouches.
- FIG. 3 is a front view showing a standing pouch 30 as an example of a packaging bag using the laminated film 10 and/or 20.
- the standing pouch 30 includes a hollow container main body 32 and one end of the container main body 32.
- a spout member 34 is provided.
- the container body 32 is formed from, for example, two body films 36 (body material) and a bottom film 38 (bottom material), each having a rectangular shape with the same planar shape.
- the body film 36 and the bottom film 38 are formed of the laminated film 10 or 20, and the outer edges of the respective sealant layers 11 or 21 are heat-welded to each other to form a heat-sealed portion 40.
- the container main body 32 has a bag shape as a whole, and when no contents are put therein, it collapses into a flat shape.
- Both the body film 36 and the bottom film 38 may be formed from the laminated film 10, both the body film 36 and the bottom film 38 may be formed from the laminated film 20, or the body film 36 may be formed from the laminated film 20.
- the body film 36 may be formed from the laminate film 20 and the bottom film 38 may be formed from the laminate film 10.
- the present invention is applicable not only to standing pouches but also to various packaging bags.
- the laminated films 10 and 20 are flexible laminated films, a flexible packaging can be formed. Since it is easy to refill and dispose of, it can be suitably used for refill packages such as refill pouches.
- the package may include two or more types of members, such as a body material and a bottom material of a standing pouch.
- the standing pouch may be formed from a pair of body materials and a bottom material that is folded in half along the fold line.
- One body material is placed at the front and rear of the body part.
- the planar shapes of the front and rear body members may be the same.
- the bottom material is folded along the fold line so that the outer surfaces thereof face each other.
- body seal portions are formed on the left and right sides, and the inner surfaces of the front and rear body members are joined to each other.
- the bottom material of the standing pouch is sandwiched between the front and back body materials with the fold line facing upward.
- a bottom seal portion is formed in which the inner surface of the bottom material is joined to the inner surface of the body material.
- the bottom seal portion joins the regions defined by the fold lines of the bottom material to the body material on the same side in the front-rear direction.
- a standing pouch can be made to stand on its own by expanding the bottom material along the fold line.
- either one of the body material and the bottom material may be formed from the laminated film 10 or 20, or it may be used for both the body material and the bottom material. It is preferable to use the laminated films 10 and 20 for the bottom material having fold lines. At the bottom of the standing pouch, the bottom material is folded in half along the fold line and joined between a pair of body materials, making it a laminated structure that provides sufficient strength against dropping of the packaging bag and bending of the bottom material.
- the films 10, 20 are used as the bottom material.
- Only the bottom material of the standing pouch may be formed from the laminated films 10 and 20 having a barrier resin layer formed from EVOH.
- the shell material in this case may be formed from a laminated film without an EVOH layer.
- a laminated film without an EVOH layer may be laminated with the sealant layer 11 using the polyethylene resin layer 14 as a base material in the laminated film 10 of the first embodiment.
- the coextruded film 22 may be omitted.
- the sealant layers 11 and 21 and the polyethylene resin layer 14 or the base film 27 may be bonded together with the adhesive layer 13 or may be bonded with the extruded resin layer 23.
- the base film 27 of the laminated film without an EVOH layer is preferably made of polyethylene resin.
- the polyethylene resin used in the laminated film without an EVOH layer is not particularly limited, but may be the same as the polyethylene resin used in the above-mentioned sealant layers 11, 21, polyethylene resin layers 14, 24, base film 27, etc. You can choose from the following options and design your own.
- the package may have a filling port, a pouring port, etc.
- a filling port For example, an opening is formed between the front and rear body members at the top of the package, which can be used for filling or dispensing the contents. After filling the contents, the body members may be joined together to seal the package.
- the spout may be formed in a shape that projects thinly at the top or corner of the package.
- the spout of a standing pouch or the like may be film molded or spout type.
- an easy-to-open means such as a notch or a half-cut groove may be formed around the opening portion.
- the easy-to-open means of the standing pouch is preferably formed at the spout of the film molding.
- the dimensions of the package are not particularly limited, but for example, when used as a refill container, the height in the vertical direction is about 100 to 500 mm, the width in the left and right direction is about 70 to 300 mm, and the filling amount is 100 cm 3 to 500 mm. An example is about 5000cm3 .
- the state of the contents includes fluids such as liquid, powder, and granules.
- the types of contents include, but are not limited to, detergents, drugs, cosmetics, medicines, beverages, seasonings, inks, paints, fuels, and the like.
- the package may be formed only from the laminated films 10 and 20 of the embodiment, or may be combined with accessory members such as labels, tags, straws, and outer boxes. From the viewpoint of recycling, it is preferable that the accessory member can be separated from the package.
- the present invention has been described above based on the preferred embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention. Modifications include additions, substitutions, omissions, and other changes of constituent elements. Since the laminated film of the embodiment is mainly made of polyethylene resin and has a sealant, it can be used not only for packaging such as packages and packaging films but also for various purposes.
- the coextruded film of the embodiment was used as a base material, and a printed layer was optionally formed on the inner surface of the base material.
- a PE-based resin film such as LLDPE was used as a sealant film, and a base material and a sealant were laminated via an adhesive layer by a dry lamination method to produce a laminated film of Example 1.
- a sealant film such as LLDPE was laminated on the inner surface of the coextruded film of the embodiment via an extruded resin layer of PE resin.
- a PE resin film such as HDPE was used as a base material, and a printed layer was optionally formed on the inner surface of the base material.
- a laminated film of Example 2 was produced by laminating a base material on the outer surface of the coextruded film via an adhesive layer by a dry lamination method.
- a PE resin film was used as a base material, and a printed layer was formed on the inner surface of the base material.
- a PE-based resin film such as LLDPE was used as a sealant, and a base material and a sealant were laminated via an adhesive layer by a dry lamination method to produce a laminated film of Comparative Example 1.
- a polyester resin film such as stretched polyester or stretched polyamide was used as the base material, and a multilayer coextruded sealant film including an EVOH layer was used as the sealant.
- a laminated film of Comparative Example 2 was produced by laminating a base material and a sealant via an adhesive layer by a dry lamination method.
- the laminated film of Comparative Example 1 has good recyclability but poor barrier properties.
- the laminated film of Comparative Example 2 is not easy to recycle because polyester, polyamide, etc. are laminated thereon. Furthermore, in Comparative Example 2, it is not easy to reduce the thickness of the EVOH layer.
- the laminated films of Examples 1 and 2 can achieve both recyclability and barrier properties by laminating a film obtained by coextruding EVOH and PE with a PE sealant.
- the thickness of the coextruded film does not need to be as thick as the multilayer sealant film
- the thickness of the barrier resin layer formed from EVOH can be reduced, thereby improving recyclability and barrier properties. Can be compatible. Since the amount of relatively expensive EVOH used can be reduced, costs can be lowered. Since the sealant layer does not contain EVOH, the degree of freedom in designing the sealant layer increases. Therefore, the present invention is industrially applicable.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
Abstract
Description
本願は、2022年3月17日に、日本で出願された特願2022-042467号に基づき優先権を主張し、その内容をここに援用する。
態様3では、態様1または2の前記バリア性樹脂層の厚さが1~5μmであってもよい。
態様4では、態様1~3のいずれかの前記共押出フィルムを基材としてもよい。
態様5では、態様1~4のいずれかにおいて、前記シーラント層と、ポリエチレン系樹脂からなる基材との間に、前記共押出フィルムが積層されていてもよい。
態様6では、態様1~5のいずれかにおいて、前記シーラント層と、前記共押出フィルムからなる基材との間に、ポリエチレン系樹脂からなる層が積層されていてもよい。
態様7では、態様1~6のいずれかにおいて、前記共押出フィルムが無延伸であってもよい。
また、本発明の態様9は、態様1~7のいずれかの前記積層フィルムから形成されたスタンディングパウチである。前記スタンディングパウチは、中空の容器本体を有しており、前記容器本体は胴材としての2枚の胴部フィルムと、底材としての底部フィルムとから形成されていてもよい。前記胴部フィルムと、前記底部フィルムの両方が態様1~7のいずれかの前記積層フィルムから形成されていてもよい。
また、本発明の態様10は、前記底材のみが態様1~7のいずれかの前記積層フィルムにより形成されたスタンディングパウチである。
実施形態の積層フィルムは、ポリエチレン系樹脂を主体とし、シーラントを有することから、包装体、包装フィルム等の包装用に限られず、種々の用途に用いることができる。
実施形態の共押出フィルムを基材とし、基材の内面には、任意に印刷層を形成した。LLDPE等のPE系樹脂フィルムをシーラントフィルムとし、ドライラミネート法により接着層を介して基材とシーラントとを積層して、実施例1の積層フィルムを作製した。
実施形態の共押出フィルムの内面に、PE系樹脂の押出樹脂層を介して、LLDPE等のシーラントフィルムを積層した。HDPE等のPE系樹脂フィルムを基材とし、基材の内面には、任意に印刷層を形成した。ドライラミネート法により接着層を介して、共押出フィルムの外面に基材を積層して、実施例2の積層フィルムを作製した。
PE系樹脂フィルムを基材とし、基材の内面に印刷層を形成した。LLDPE等のPE系樹脂フィルムをシーラントとし、ドライラミネート法により接着層を介して基材とシーラントとを積層して、比較例1の積層フィルムを作製した。
延伸ポリエステルや延伸ポリアミド等のポリエステル系樹脂フィルムを基材とし、EVOH層を含む多層の共押出シーラントフィルムをシーラントとした。ドライラミネート法により接着層を介して基材とシーラントとを積層して、比較例2の積層フィルムを作製した。
Claims (10)
- エチレン-ビニルアルコール共重合体(EVOH)から形成されたバリア性樹脂層の少なくとも片面に、ポリエチレン系樹脂層が共押出により隣接して積層された共押出フィルムと、シーラント層とが積層されていることを特徴とする積層フィルム。
- 前記共押出フィルムにおいて、前記バリア性樹脂層の両面に、前記ポリエチレン系樹脂層が共押出により隣接していることを特徴とする請求項1に記載の積層フィルム。
- 前記バリア性樹脂層の厚さが、1~5μmであることを特徴とする請求項1または2に記載の積層フィルム。
- 前記共押出フィルムを基材とすることを特徴とする請求項1~3のいずれか1項に記載の積層フィルム。
- 前記シーラント層と、ポリエチレン系樹脂からなる基材との間に、前記共押出フィルムが積層されていることを特徴とする請求項1~3のいずれか1項に記載の積層フィルム。
- 前記シーラント層と、前記共押出フィルムからなる基材との間に、ポリエチレン系樹脂からなる層が積層されていることを特徴とする請求項1~4のいずれか1項に記載の積層フィルム。
- 前記共押出フィルムが無延伸であることを特徴とする請求項1~6のいずれか1項に記載の積層フィルム。
- 請求項1~7のいずれか1項に記載の積層フィルムから形成された包装体。
- 請求項1~7のいずれか1項に記載の積層フィルムから形成されたスタンディングパウチ。
- 底材のみが請求項1~7のいずれか1項に記載の積層フィルムから形成されたスタンディングパウチ。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23770772.4A EP4494867A4 (en) | 2022-03-17 | 2023-03-14 | LAMINATED FILM AND PACKAGING |
| US18/839,887 US20250153470A1 (en) | 2022-03-17 | 2023-03-14 | Laminated film and package |
| CN202380015830.9A CN118475471A (zh) | 2022-03-17 | 2023-03-14 | 层叠膜和包装体 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022-042467 | 2022-03-17 | ||
| JP2022042467A JP2023136668A (ja) | 2022-03-17 | 2022-03-17 | 積層フィルムおよび包装体 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023176817A1 true WO2023176817A1 (ja) | 2023-09-21 |
Family
ID=88023878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2023/009812 Ceased WO2023176817A1 (ja) | 2022-03-17 | 2023-03-14 | 積層フィルムおよび包装体 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250153470A1 (ja) |
| EP (1) | EP4494867A4 (ja) |
| JP (1) | JP2023136668A (ja) |
| CN (1) | CN118475471A (ja) |
| WO (1) | WO2023176817A1 (ja) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008081525A (ja) | 2006-09-26 | 2008-04-10 | Dainippon Printing Co Ltd | 樹脂組成物、バリア性共押出多層シーラントフィルム、このフィルムを用いた包装材料、包装袋および包装製品 |
| JP2010143624A (ja) * | 2008-12-19 | 2010-07-01 | Asahi Kasei Pax Corp | スパウト容器用積層フィルム及びこれを用いたスパウト容器 |
| JP2013039932A (ja) | 2011-08-12 | 2013-02-28 | Fujimori Kogyo Co Ltd | 注出口付き包装袋 |
| JP2021160255A (ja) * | 2020-03-31 | 2021-10-11 | 大日本印刷株式会社 | 基材、蒸着基材、積層体および包装容器 |
| JP2021160267A (ja) * | 2020-03-31 | 2021-10-11 | 大日本印刷株式会社 | 積層体および包装容器 |
| JP2022042467A (ja) | 2020-09-02 | 2022-03-14 | ネイバー コーポレーション | 人工ニューラルネットワークモデル学習方法およびシステム |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS594927Y2 (ja) * | 1979-04-10 | 1984-02-14 | 凸版印刷株式会社 | 自立性袋 |
| JP5412963B2 (ja) * | 2009-06-03 | 2014-02-12 | 凸版印刷株式会社 | 積層包装袋 |
| ES2778056T3 (es) * | 2012-01-31 | 2020-08-07 | Performance Mat Na Inc | Película multicapa que incluye copolímero de olefina cíclica |
| JP6007565B2 (ja) * | 2012-04-19 | 2016-10-12 | 凸版印刷株式会社 | ラミネートチューブ用多層フィルムおよび該多層フィルムを用いたラミネートチューブ |
-
2022
- 2022-03-17 JP JP2022042467A patent/JP2023136668A/ja active Pending
-
2023
- 2023-03-14 EP EP23770772.4A patent/EP4494867A4/en active Pending
- 2023-03-14 WO PCT/JP2023/009812 patent/WO2023176817A1/ja not_active Ceased
- 2023-03-14 US US18/839,887 patent/US20250153470A1/en active Pending
- 2023-03-14 CN CN202380015830.9A patent/CN118475471A/zh active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008081525A (ja) | 2006-09-26 | 2008-04-10 | Dainippon Printing Co Ltd | 樹脂組成物、バリア性共押出多層シーラントフィルム、このフィルムを用いた包装材料、包装袋および包装製品 |
| JP2010143624A (ja) * | 2008-12-19 | 2010-07-01 | Asahi Kasei Pax Corp | スパウト容器用積層フィルム及びこれを用いたスパウト容器 |
| JP2013039932A (ja) | 2011-08-12 | 2013-02-28 | Fujimori Kogyo Co Ltd | 注出口付き包装袋 |
| JP2021160255A (ja) * | 2020-03-31 | 2021-10-11 | 大日本印刷株式会社 | 基材、蒸着基材、積層体および包装容器 |
| JP2021160267A (ja) * | 2020-03-31 | 2021-10-11 | 大日本印刷株式会社 | 積層体および包装容器 |
| JP2022042467A (ja) | 2020-09-02 | 2022-03-14 | ネイバー コーポレーション | 人工ニューラルネットワークモデル学習方法およびシステム |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4494867A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20250153470A1 (en) | 2025-05-15 |
| CN118475471A (zh) | 2024-08-09 |
| JP2023136668A (ja) | 2023-09-29 |
| EP4494867A4 (en) | 2026-03-25 |
| EP4494867A1 (en) | 2025-01-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP4279273A1 (en) | Layered body and packaging bag | |
| US20240066844A1 (en) | Laminated Body and Packaging Bag | |
| JP2026009274A (ja) | 積層フィルムおよび包装袋 | |
| JP2011148503A (ja) | 自立性包装袋 | |
| WO2023176817A1 (ja) | 積層フィルムおよび包装体 | |
| JP6988190B2 (ja) | 包装材用フィルム、およびこれを用いた包装材、包装体 | |
| JP2024026919A (ja) | 積層体および包装袋 | |
| JP2023080884A (ja) | 積層体および包装袋 | |
| JP4508367B2 (ja) | パウチ | |
| JP4508369B2 (ja) | パウチ | |
| WO2022092021A1 (ja) | 積層体および包装体 | |
| JP2025018128A (ja) | 共押出フィルム、積層フィルムおよび包装袋 | |
| US20240116280A1 (en) | Film, Laminated Film, And Packaging Bag | |
| CN116368073A (zh) | 包装袋 | |
| JP2023031400A (ja) | 積層体、積層体の製造方法および包装体 | |
| JP7728651B2 (ja) | 積層フィルムおよび包装袋 | |
| EP4279271A1 (en) | Laminate and package body | |
| JP4997838B2 (ja) | 収納物飛散防止用注出口付き包装袋 | |
| JP2024033102A (ja) | 積層体および包装袋 | |
| JP2024134792A (ja) | 積層体および包装袋 | |
| WO2026013549A1 (ja) | 包装容器 | |
| JP2026010929A (ja) | 包装容器 | |
| JP2024006244A (ja) | 積層体および包装袋 | |
| JP2023165215A (ja) | 自立性包装袋 | |
| WO2025202916A1 (ja) | フィルム、積層フィルム、包装袋、ペレット、およびリサイクルフィルム |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 23770772 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 202380015830.9 Country of ref document: CN |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 18839887 Country of ref document: US |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2023770772 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| ENP | Entry into the national phase |
Ref document number: 2023770772 Country of ref document: EP Effective date: 20241017 |
|
| WWP | Wipo information: published in national office |
Ref document number: 18839887 Country of ref document: US |