WO2022124229A1 - シーラントフィルム - Google Patents

シーラントフィルム Download PDF

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Publication number
WO2022124229A1
WO2022124229A1 PCT/JP2021/044471 JP2021044471W WO2022124229A1 WO 2022124229 A1 WO2022124229 A1 WO 2022124229A1 JP 2021044471 W JP2021044471 W JP 2021044471W WO 2022124229 A1 WO2022124229 A1 WO 2022124229A1
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WO
WIPO (PCT)
Prior art keywords
layer
polyethylene
virgin
sealant film
recycled
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/JP2021/044471
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
俊樹 山田
隆裕 安海
連 松▲崎▼
祐司 上田
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.)
Toyo Seikan Group Holdings Ltd
Toyo Seikan Co Ltd
Original Assignee
Toyo Seikan Kaisha Ltd
Toyo Seikan Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyo Seikan Kaisha Ltd, Toyo Seikan Co Ltd filed Critical Toyo Seikan Kaisha Ltd
Priority to US18/039,432 priority Critical patent/US20230416512A1/en
Priority to EP21903332.1A priority patent/EP4261041A4/en
Priority to CN202180082470.5A priority patent/CN116600993A/zh
Priority to JP2022568247A priority patent/JPWO2022124229A1/ja
Publication of WO2022124229A1 publication Critical patent/WO2022124229A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethylene
    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • 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
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    • 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
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B2250/24—All layers being polymeric
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/242—All polymers belonging to those covered by group B32B27/32
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B2264/10—Inorganic particles
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    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/105—Metal
    • B32B2264/1054—Alkaline earth metal
    • 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
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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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
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different 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
    • B32B2272/00—Resin or rubber layer comprising scrap, waste or recycling 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
    • B32B2274/00—Thermoplastic elastomer 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
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B32B2307/4026—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/75—Printability
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/16—Applications used for films
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/20—Recycled plastic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging

Definitions

  • the present invention relates to a sealant film containing a recycled polyethylene resin, and further relates to a laminate for a packaging bag and a packaging bag using the sealant film.
  • Patent Document 1 proposes a method for recovering and regenerating a multilayer film, which comprises blending low molecular weight polyethylene into scrap of a transparent multilayer film composed of a polyethylene layer, an adhesive layer and a nylon layer. It has been proposed to pelletize recycled products and use the pellets to produce films.
  • Patent Document 2 proposes a recycled film in which the mixing ratio of the recycled material (for example, recycled polyethylene) is 50 to 90% by mass and the mixing ratio of foreign matter is 0.1 to 2% by mass with respect to the entire film.
  • the recycled film has a three-layer structure, and the first layer contains 50 to 90% by mass of a recycled material, 0.1 to 2% by mass of foreign matter, and 2 to 4% by mass of a pressure-sensitive adhesive. It is disclosed that the layer contains 50 to 90% by mass of recycled material and 0.1 to 2% by mass of foreign matter, and the third layer is made of unused low density polyethylene (LDPE).
  • LDPE low density polyethylene
  • the film using recycled polyethylene as described above cannot be used for producing a sealant film, especially a packaging bag. That is, the sealant film has various problems such as a decrease in thermal adhesiveness due to the use of a recycled material, a decrease in flavor due to an odor, a poor appearance due to coloring, and a decrease in strength.
  • an object of the present invention is to provide a sealant film in which heat adhesion is ensured while using recycled polyethylene.
  • Another object of the present invention is to provide a sealant film which is not limited to containing recycled polyethylene but has a problem of odor, coloring, or a decrease in strength.
  • Still another object of the present invention is to provide a laminated body for a packaging bag and a packaging bag formed by using the above-mentioned sealant film containing recycled polyethylene.
  • two virgin polyethylene layers a first virgin polyethylene layer and a second virgin polyethylene layer, are included, and an intermediate layer containing recycled polyethylene is provided between the two virgin polyethylene layers.
  • a sealant film characterized by being present is provided.
  • the regenerated polyethylene contains at least one metal component selected from the group consisting of Mg, Ca, Fe and Zn.
  • a layer containing a deodorant is provided.
  • Either the first virgin polyethylene layer, the second virgin polyethylene layer or the intermediate layer is a layer containing the deodorant, or the intermediate layer and the first virgin polyethylene layer or the second.
  • a layer containing the deodorant is provided between the virgin polyethylene layer and the virgin polyethylene layer.
  • the deodorant is zeolite.
  • the intermediate layer contains an antioxidant.
  • a white layer containing a white pigment is provided on at least one side of the intermediate layer.
  • the first and / or the second virgin polyethylene layer is the white layer, or the white layer is provided between the first and / or the second virgin polyethylene layer and the intermediate layer. .. (8)
  • the intermediate layer contains virgin polyethylene together with the regenerated polyethylene.
  • the intermediate layer contains a thermoplastic elastomer or a linear low-density polyethylene as a modifier for improving the strength.
  • a laminate for a packaging bag composed of the above-mentioned sealant film and a base film laminated on the first virgin polyethylene layer of the sealant film.
  • the base film is made of polyethylene terephthalate, nylon or high-density polyethylene.
  • a printing layer or an inorganic thin-film deposition layer is formed between the base film and the first virgin polyethylene layer. Is preferable.
  • a packaging bag in which the second virgin polyethylene layers in the above-mentioned packaging bag laminate are bonded to each other by heat sealing.
  • a packaging bag an embodiment in which the body portion is formed by the packaging bag laminate and the bottom portion is formed by a sealant film containing no recycled resin can be preferably adopted.
  • the sealant film of the present invention an intermediate layer containing recycled polyethylene is sandwiched between two virgin polyethylene layers (first and second virgin polyethylene layers). Therefore, it is possible to effectively avoid the deterioration of the adhesiveness (laminating property, heat sealing property) due to the recycled polyethylene.
  • the base film is laminated on one side of the virgin polyethylene layer (first virgin polyethylene layer) with a solvent-type or solvent-free thermosetting adhesive, so that the laminate is used for producing a packaging bag. It can be used effectively as a body. This is because in such a laminated body, the virgin polyethylene layer (second virgin polyethylene layer) on the other side can be heat-sealed as an inner layer to make a bag.
  • this multi-layer structure is utilized to avoid deterioration of flavor due to an agent for suppressing performance deterioration or the like due to the use of recycled polyethylene, for example, odor.
  • a deodorant can be used, a white colorant (formation of a white layer) can be used to avoid poor appearance due to coloring, and a modifier can be used to avoid a decrease in strength.
  • the piercing strength of the packaging bag can be increased, the gas barrier property is improved by forming the inorganic thin-film film, and the appearance characteristics are improved by forming the printing layer. realizable.
  • Schematic side sectional view showing the basic layer structure of the sealant film of this invention. Schematic side sectional view showing another example of the layer structure of the sealant film of the present invention.
  • the schematic side sectional view which shows an example of the layer structure of the laminated body for a packaging bag formed by using the sealant film of FIG.
  • the sealant film of the present invention which is shown as a whole with reference to FIG. 1, is, as shown in FIG. 1, between the first virgin polyethylene layer 1 and the second virgin polyethylene layer 3. It has an intermediate layer 5 containing recycled polyethylene.
  • polyethylene may be simply referred to as PE.
  • the sealant film 10 is not limited to this, but is basically used as a laminated body for a packaging bag by attaching a base film to be described later, and is used in a finally obtained packaging bag.
  • the base film side is the outer surface, and the side opposite to the base film is the side that comes into contact with the contents contained in the packaging bag. Therefore, in FIGS. 1 to 3, the side to which the base film is attached (or the base film side) is referred to as (outside), and the opposite side is referred to as (inside).
  • the sealant film 10 has a layered structure that exhibits excellent adhesiveness on both the outer surface side and the inner surface side.
  • the second virgin PE layer 3 (inner virgin PE layer) is required to have heat-sealing properties, and is not particularly limited, but as a virgin PE, the density is 0.930 to 0.910 g / cm.
  • Low density polyethylene (LDPE) in the range of 3 is preferably used.
  • the MFR melt flow rate, 190 ° C.
  • the recycled PE contained in the intermediate layer 5 is recovered from a used polyethylene molded body or from a waste material at the time of manufacturing a polyethylene molded body, and is crushed, washed with an alkali or the like, filtered in a molten state, and the like. It is obtained through various steps such as extraction with an organic solvent. Therefore, in connection with undergoing such a step, at least one metal component selected from the group consisting of Mg, Ca, Fe and Zn is contained as an unavoidable impurity. That is, the presence of these metal components can be confirmed by ICP-MS or the like, and the use of recycled PE can be confirmed by the presence of these metal components.
  • the content of the metal component contained in the recycled PE cannot be unconditionally specified because it differs depending on the manufacturer and the like, but in general, Mg is 1 ppm or more, Ca is 5 ppm or more, Fe is 0.1 ppm or more, and Zn. Is 0.1 ppm or more.
  • Mg is 1 ppm or more
  • Ca is 5 ppm or more
  • Fe is 0.1 ppm or more
  • Zn Is 0.1 ppm or more.
  • Na, Al, K, Ti and the like may be contained. (In virgin PE, the content of these metal components is below the detection limit.)
  • the sealant film 10 and the laminate for packaging bags and packaging bags made from the film are also excellent in environmental suitability, but the amount is larger than necessary.
  • the recycled PE of the above the amount of the virgin PE used is reduced according to the amount of the recycled PE, so that the heat-sealing property and other physical properties are significantly deteriorated. Therefore, from the viewpoint of avoiding such deterioration of physical properties, it is preferable that the recycled PE content in the sealant film 10 is about 15 to 90% by mass.
  • the thickness of the intermediate layer 5 is 1, the thickness of the first virgin PE layer 1 and the second virgin layer 3 is 0. It is preferable to set it to be about 0.05 to 0.3.
  • the intermediate layer 5 may be formed of recycled PE alone, but it is generally preferable that the intermediate layer 5 also contains virgin PE. That is, the recycled PE is usually diluted with virgin PE and stored as pellets, and the sealant film 10 is formed by coextrusion molding using such recycled PE-containing pellets and virgin PE pellets.
  • the PE constituting the intermediate layer 5 may be derived from a petroleum raw material, derived from a plant raw material, or a mixture thereof.
  • each layer contains a deodorant, an antioxidant, a white pigment, a modifier and the like.
  • the deodorant captures the offensive odor of the recycled polyethylene and prevents the flavor of the contents from being deteriorated due to the offensive odor.
  • the first virgin PE layer 1 outer virgin PE layer
  • the intermediate layer 5 and the second It may be blended in any of the virgin PE layer 3 (inner virgin PE layer) of the above, but from the viewpoint that it is used to capture the offensive odor caused by the recycled PE and prevent the flavor property of the contents from being deteriorated due to the offensive odor. Is preferably blended in the intermediate layer 5 or the second virgin PE layer 3 (inner virgin PE layer).
  • Typical examples of such deodorants are silica-based particles such as silica gel and aluminum silicate-related particles such as zeolite.
  • MFI-type zeolites especially silica.
  • Silica-rich MFI-type zeolite having an alumina molar ratio (SiO 2 / Al 2 O 3 ratio) of 80 or more is preferably used. It is usually preferable to use such a deodorant in an amount of 1 to 30 parts by mass per 100 parts by mass of recycled PE.
  • Typical antioxidants are hindered phenols and hindered amines, which have been conventionally used as resin compounding agents. Such an antioxidant is used together with the recycled PE in the intermediate layer 5 in order to prevent further deterioration due to the oxidation of the recycled PE, and is usually 0.1 to 0.3 per 100 parts by mass of the recycled PE. It is desirable to use in the amount of parts by mass.
  • Titanium oxide and zinc oxide are typical white pigments, which are provided to avoid the problem of coloring due to recycled PE, and are provided in a layer on the outer surface side with respect to the intermediate layer 5, for example, a first virgin PE. It is blended in layer 1. That is, it is used in an appropriate amount to conceal the coloring by the recycled PE so that it cannot be seen from the outside.
  • the modifier is used to suppress the decrease in strength due to the recycled PE, and is usually blended in the intermediate layer 5 in which the recycled PE is present.
  • a thermoplastic elastomer is preferably used. That is, the impact resistance is improved by imparting elasticity to the intermediate layer 5.
  • examples of such a thermoplastic elastomer include an ethylene / ⁇ -olefin copolymer, an ethylene / propylene copolymer (EPR), a styrene / butadiene copolymer (SBR), and an ethylene / propylene / butene copolymer (EPBR).
  • the ⁇ -olefin copolymer is particularly suitable because it has excellent dispersibility in the intermediate layer 5 containing recycled PE and virgin PE. Further, it is preferable that the above-mentioned modifier is blended in the intermediate layer 5 in an amount of 1 to 30 parts by mass per 100 parts by mass of recycled PE.
  • linear low density polyethylene (LLDPE) can be blended as the above-mentioned modifier.
  • Such LLDPEs have densities in the range of 0.910 to 0.925 g / cm 3 and have extremely high molecular linearity, for example, ⁇ such as butene-1, hexene-1, 4-methylpentene-1 and the like.
  • ⁇ such as butene-1, hexene-1, 4-methylpentene-1 and the like.
  • -A trace amount (about several percent) of olefin is copolymerized with ethylene, and a short ⁇ -olefin chain is introduced as a branch into a long ethylene chain to reduce the density.
  • the LLDPE used as an auxiliary component of the modifier as described above one having an MFR (190 ° C.) of 1.0 to 15 g / 10 min is preferably used from the viewpoint of film formability, and the comonomer component is preferably used.
  • Hexene-1 and 4-methylpentene-1 are preferable, and hexene-1 is the most suitable.
  • Such LLDPE is
  • the heat sealant film 10 of the present invention can take various embodiments, provided that it has the above-mentioned basic three-layer structure. For example, by blending a white pigment into the first PE layer 1 located on the outer surface to form a white layer, the color of the recycled PE is concealed so as not to be seen from the outside, and at the same time, the inner second PE layer 3 is covered. By blending a deodorant and capturing the odor derived from the recycled PE, it is possible to prevent the flavor of the contents of the packaging bag from deteriorating.
  • the white layer or the layer containing the deodorant can be provided as an independent layer.
  • a layer 7 in which a deodorizing agent is blended with virgin PE is provided between the intermediate layer 5 containing recycled PE and the second virgin PE layer 3 on the inner surface side, and an intermediate layer 7 is provided.
  • a white layer 9 in which a white pigment is blended in the virgin PE can be provided between the layer 5 and the first virgin PE layer 1 on the outer surface side. Even in such a five-layer sealant film 10, it is desirable to keep the content ratio of the recycled PE showing the film 10 within the above-mentioned range (about 30 to 90% by mass).
  • the thickness of the sealant film 10 of the present invention described above is not particularly limited, but it is usually preferably in the range of about 50 to 200 ⁇ m in consideration of the rigidity when used as a packaging bag.
  • each component is dry-blended, put into an extruder, melt-kneaded, and the blend is co-extruded into a film from a T-die to extrude a multilayer film-like melt. , Manufactured by contacting with a cooling roll to solidify and wind up.
  • the above-mentioned sealant film 10 of the present invention can be used for various purposes by utilizing the good adhesiveness of the virgin PE layers 1 and 3 existing on both sides thereof, and is particularly laminated used for producing a packaging bag. Best used as a body.
  • FIG. 3 shows an example of the layer structure of such a laminated body.
  • the packaging bag laminate shown by 30 as a whole includes a base film 21 laminated on the first virgin PE layer 1 side of the sealant film 10, and the base film 21 and the first virgin.
  • a functional layer 23 is formed between the PE layer 1 and the PE layer 1, if necessary.
  • the base film 21 is provided so as to be located on the outer surface side of the packaging bag, and the material thereof is not particularly limited, but the density is high in that appropriate rigidity can be obtained when used as a packaging bag.
  • High-density polyethylene having a value greater than 0.930 g / cm 3 , polyamide resin, polyester resin, or the like is suitable.
  • polyamide-based resin include nylon 6, nylon 6-6, nylon 6-10, nylon 11, nylon 12, nylon 13, nylon 6 / nylon 6,6 copolymer, and aromatic nylon (for example, polymethoxylylene hydrangea).
  • Pamide amorphous nylon (for example, nylon 6I / 6T) and the like can be mentioned.
  • polyester resin examples include polyethylene terephthalate (PET), polybutylene terephthalate, polyethylene naphthalate (PEN) and the like.
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • Polyamide films and polyester films, particularly polyamide films, are suitable in terms of increasing the piercing strength of the packaging bag.
  • the base film 21 may be stretched.
  • the material constituting the base film 21 may be derived from a petroleum raw material, derived from a plant raw material, or a mixture thereof. It may also contain recycled materials. The thickness of such a base film 21 is usually about 5 to 50 ⁇ m.
  • an inorganic thin-film deposition layer or a printing layer is typical.
  • the inorganic vapor deposition layer is formed by plasma CVD using an Al compound, a silicon compound, or the like, and is used to enhance the gas barrier property of the packaging bag or to conceal the color of the recycled PE.
  • Such an inorganic thin-film deposition layer is a thin layer having a thickness of about 0.001 to 1 ⁇ m.
  • the print layer is formed by ink of each color by gravure printing, inkjet printing, etc., and is intended for decoration, etc., but especially in the case of solid printing, it also has an action of hiding the color of recycled PE. Have.
  • the thickness of the printed layer is usually 5 ⁇ m or less.
  • a functional layer such as an inorganic vapor deposition layer or a printing layer is appropriately provided on the surface of the base film 21, and then a thermosetting adhesive such as a urethane adhesive or an epoxy adhesive is provided. It can also be manufactured by attaching the base film 21 (or the functional layer 23) on the first virgin PE layer 1 of the sealant film 10 using the above.
  • Bag making is done by known means. For example, a packaging bag filled with contents by making an empty pouch by a three-way seal using two laminated bodies 30, filling the contents from the opening, and finally closing the opening with a heat seal. (Pouch) 40 is obtained. Further, the body of the pouch is made by forming one laminated body 30 into a cylindrical shape and heat-sealing the second virgin PE layers 3 at both ends, and then empty using the laminated body 30 dedicated to the bottom. Pouches can also be manufactured. Such a method is advantageous in increasing the volume of the pouch or imparting standing property.
  • the packaging bag 40 of the present invention is used exclusively for the body, and a normal sealant film formed from virgin PE in which recycled PE is not used is used exclusively for the bottom to make the packaging bag 40. Is preferable.
  • the packaging bag 40 thus obtained is particularly used as a standing pouch because of its high strength at the bottom.
  • the packaging bag obtained from the sealant film of the present invention contains a large amount of recycled PE, is not only excellent in environmental suitability, but also effectively avoids performance deterioration due to recycled PE, and is a liquid or solid substance.
  • it is put to practical use as a packaging bag containing foods, liquid detergents, shampoos, rinses, and the like.
  • it is suitably used as a standing pouch for refilling shampoo and conditioner.
  • melt flow rate is a value at 190 ° C., and the unit is g / 10 min.
  • Polyethylene A It is a mixture of unused linear low density polyethylene (LLDPE) having an MFR of 0.8 and unused low density polyethylene (LDPE) having an MFR of 2.0.
  • Polyethylene B PE-B
  • Polyethylene C PE-C
  • White polyethylene WH-PE
  • Deodorized polyethylene DEO-PE
  • RE-PE Recycled polyethylene
  • ⁇ Deodorant> Using a gas chromatograph, the odorous component volatilized at 100 ° C. was measured. The deodorizing property was evaluated based on whether the area values of aldehyde-based nonanal and benzaldehyde were lower than those in the basic experiment in which deodorizing polyethylene was not used.
  • Example 1 Various polyethylenes were used to prepare a sealant film in accordance with the above-mentioned film forming method.
  • the composition and thickness of each layer are as shown in Table 2 below.
  • Example 2 A sealant film was produced in the same manner as in Experimental Example 1 except that the blending amounts of white polyethylene (WH-PE) and deodorizing polyethylene (DEO-PE) blended in the white deodorizing layer were changed to 20.0% by mass, respectively. did.
  • the composition and thickness of each layer are as shown in Table 3 below.
  • Example 3 A sealant film was produced in the same manner as in Experimental Example 1 except that the blending amounts of white polyethylene (WH-PE) and deodorizing polyethylene (DEO-PE) blended in the white deodorizing layer were changed to 30.0% by mass, respectively. did.
  • the composition and thickness of each layer are as shown in Table 4 below.
  • Second virgin polyethylene layer 5 Second virgin polyethylene layer 5: Intermediate layer 10: Sealant film 21: Base film 23: Functional layer 30: Packaging bag laminate 40: Packaging bag

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)
PCT/JP2021/044471 2020-12-11 2021-12-03 シーラントフィルム Ceased WO2022124229A1 (ja)

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US18/039,432 US20230416512A1 (en) 2020-12-11 2021-12-03 Sealant film
EP21903332.1A EP4261041A4 (en) 2020-12-11 2021-12-03 SEALING FOIL
CN202180082470.5A CN116600993A (zh) 2020-12-11 2021-12-03 密封膜
JP2022568247A JPWO2022124229A1 (https=) 2020-12-11 2021-12-03

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JP2024121553A (ja) * 2023-02-27 2024-09-06 東洋製罐株式会社 シーラントフィルム
WO2024248005A1 (ja) 2023-05-29 2024-12-05 Ｔｏｐｐａｎホールディングス株式会社 シーラントフィルム、積層体、包装材及び包装袋
WO2024262262A1 (ja) 2023-06-21 2024-12-26 Ｔｏｐｐａｎホールディングス株式会社 シーラントフィルム、積層体、包装材及び包装袋
WO2025100421A1 (ja) * 2023-11-06 2025-05-15 東洋製罐株式会社 積層体及び包装容器
WO2025126020A1 (ja) * 2023-12-12 2025-06-19 Ｚａｃｒｏｓ株式会社 シーラントフィルムおよび積層フィルム

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US20230416512A1 (en) 2023-12-28
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