WO2015005279A1 - Film stratifié facile à ouvrir et son utilisation - Google Patents

Film stratifié facile à ouvrir et son utilisation Download PDF

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Publication number
WO2015005279A1
WO2015005279A1 PCT/JP2014/068043 JP2014068043W WO2015005279A1 WO 2015005279 A1 WO2015005279 A1 WO 2015005279A1 JP 2014068043 W JP2014068043 W JP 2014068043W WO 2015005279 A1 WO2015005279 A1 WO 2015005279A1
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WIPO (PCT)
Prior art keywords
ethylene
layer
easy
polymer
laminated film
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PCT/JP2014/068043
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English (en)
Japanese (ja)
Inventor
田口　栄一
和臣 石井
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三井化学東セロ株式会社
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Application filed by 三井化学東セロ株式会社 filed Critical 三井化学東セロ株式会社
Priority to KR1020157030244A priority Critical patent/KR101749854B1/ko
Priority to JP2015526324A priority patent/JP5968543B2/ja
Publication of WO2015005279A1 publication Critical patent/WO2015005279A1/fr

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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
    • B32B27/32—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
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • 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
    • B32B2439/70—Food packaging

Definitions

  • the present invention relates to an easily-openable resin laminated film having improved sealing properties and various uses, as well as excellent sealing properties and easy-opening properties to various materials.
  • Packaging for snacks such as rice crackers and potato chips, food packaging such as jelly, milk, yogurt, pudding, tofu, and lactic acid beverages, blister packaging, and other medicines, medical equipment, daily necessities, sundries, etc.
  • Packaging in which a tray-like plastic container is sealed with a lid made of a plastic laminate film or an aluminum foil laminate film is widely used. What is required for such packaging is mechanical strength that can withstand distribution channels, sealing strength that can maintain hygiene, and good openability during use.
  • a film in the category called easy-opening (easy peelability, easy peel) film is used as a bag with a heat-sealing layer as the innermost layer, or as a cover material.
  • the package used is widely used.
  • various heat-sealing layers proposed so far have high heat-sealing strength for sealing, but easy peelability at the time of opening is not always sufficient, and an appropriate balance between them can be obtained. It has been demanded.
  • an easy-opening packaging body in which an easy-peeling layer is composed of a mixture layer of polypropylene resin and polyethylene resin and a high-density polyethylene resin layer
  • an easy-opening packaging body in which an easy-peeling layer is composed of a mixture layer of polypropylene resin and polyethylene resin and a high-density polyethylene resin layer
  • Patent Document 1 A sealant film for a lid of a polypropylene container comprising an adhesive layer (easy peeling layer) and a support layer (laminate layer) made of a mixed resin of polypropylene and polyethylene, an ethylene- ⁇ -olefin copolymer, Resin composition for easy-open heat seal comprising propylene-ethylene copolymer and low density polyethylene (see Patent Document 3), polypropylene resin, ethylene / ⁇ -olefin random copolymer resin having a density of 930 kg / m 3 or less, and A multilayer sheet having a sealing layer made of a polyethylene resin composition (
  • the object of the present invention is to maintain sealing performance and easy opening, while maintaining sealing performance, that is, pressure from outside (external pressure) and pressure from inside (internal pressure) even at a temperature higher than room temperature.
  • Another object of the present invention is to obtain an easy-open laminated film having a sealing strength that can withstand the above.
  • the present invention relates to an easily openable laminated film and its use.
  • the easy-open laminated film is composed of a heat-sealing layer, an intermediate layer, and a laminate layer.
  • Thermal fusion layer Propylene polymer (A-1) 79.8 to 94% by mass, 4 to 10% by mass of an ethylene polymer (B-1) having a density of 900 kg / m 3 or more, Ethylene / ⁇ -olefin random copolymer (C-1) having a density of 860 kg / m 3 or more and less than 900 kg / m 3 1.5 to 7.5% by mass
  • the heat seal strength (peeling strength) stable in a wide temperature range, and the packaging body from the outside even at a temperature higher than room temperature. Sealing strength that can withstand pressure (external pressure) and pressure from the inside (internal pressure), and can be easily peeled when peeled (opened), and there is no stringing on the peeled surface, giving it a soft feel. is doing.
  • a commercially available resin usually a homopolymer of propylene having a density of about 890 to 930 kg / m 3 or a propylene copolymer, that is, at least one selected from propylene and a small amount of other ⁇ -olefins It is a copolymer comprising the comonomer.
  • the copolymer may be a random copolymer or a block copolymer.
  • ⁇ -olefins in the definition of this copolymer of propylene include ethylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, 4-methyl-1-pentene, and the like. And ⁇ -olefins having about 4 to 20 carbon atoms. Such other ⁇ -olefins may be copolymerized singly or in combination of two or more ⁇ -olefins.
  • the melting point based on a differential scanning calorimeter (DSC) is 110 to 145 ° C., particularly 115, because of the balance of heat-fusibility and heat resistance of the easily openable laminated film obtained.
  • a propylene / ⁇ -olefin random copolymer in the range of ⁇ 140 ° C. is preferred.
  • the propylene polymer (A-1) according to the present invention includes an ethylene polymer (B-1), an ethylene / ⁇ -olefin random copolymer (C-1), and a tackifier resin (D-1) described later.
  • the melt flow rate (MFR) (ASTM D1238, 230 ° C., 2160 g load) is not particularly limited as long as the olefin polymer composition (E) formed by mixing with the film has an ability to form a film. Therefore, it is usually in the range of 0.01 to 100 g / 10 minutes, preferably 0.1 to 70 g / 10 minutes.
  • the propylene polymer (A-1) according to the present invention two or more propylene polymers can be used in combination.
  • the propylene polymer (A-1) according to the present invention is produced using various known production methods, specifically, for example, using an olefin polymerization catalyst such as a Ziegler-Natta catalyst or a single site catalyst. Can do. In particular, it can be produced using a single site catalyst.
  • the single site catalyst is a catalyst having a uniform active site (single site), and examples thereof include a metallocene catalyst (so-called Kaminsky catalyst) and a Brookhart catalyst.
  • the metallocene catalyst is a catalyst composed of a metallocene transition metal compound, an organoaluminum compound, and at least one compound selected from the group consisting of compounds that react with the metallocene transition metal compound to form an ion pair. It may be supported.
  • an ethylene homopolymer or ethylene and a small amount of an ⁇ -olefin having 3 to 10 carbon atoms such as propylene, 1- Random copolymers with butene, 1-heptene, 1-hexene, 1-octene, 4-methyl-1-pentene, etc., so-called high-pressure low-density polyethylene (HP-LDPE), linear or linear Ethylene low polymer (L-LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE) Is Ren ⁇ alpha-olefin copolymer.
  • HP-LDPE high-pressure low-density polyethylene
  • L-LDPE linear or linear Ethylene low polymer
  • MDPE medium density polyethylene
  • HDPE high density polyethylene
  • the ethylene polymer (B-1) according to the present invention may be a single polymer or a composition (mixture) of two or more ethylene polymers.
  • the melt flow rate (MFR) (ASTM D1238, 190 ° C., 2160 g load) of the ethylene polymer (B-1) according to the present invention is the same as that of the propylene polymer (A-1), ethylene / ⁇ -olefin described later.
  • MFR melt flow rate
  • ASTM D12308 190 ° C., 2160 g load
  • the olefin polymer composition (E) is mixed with the random copolymer (C-1) and the tackifier resin (D-1), it is not particularly limited as long as it has a film-forming ability. 0.01 to 100 g / 10 min, preferably 0.1 to 70 g / 10 min.
  • the ethylene / ⁇ -olefin random copolymer (C-1) which is one of the constituent components of the olefin polymer composition (E) that serves as the heat-sealing layer of the easy-open laminated film of the present invention, has a density of 860 kg / m 3 or more ⁇ 900 kg / m less than 3, preferably ⁇ - olefin 860 kg / m 3 or more ⁇ 895kg / m of less than 3 ethylene and carbon 3-10, such as propylene, 1-butene, 1-heptene, 1 -Random copolymers with ⁇ -olefins such as hexene, 1-octene, 4-methyl-1-pentene.
  • the ethylene / ⁇ -olefin random copolymer (C-1) is preferably at least one ethylene / ⁇ -olefin having a density in the range of 860 to 895 kg / m 3 and an ⁇ -olefin having 4 to 10 carbon atoms. It is composed of an ⁇ -olefin random copolymer (C1-1) and an ethylene / propylene random copolymer (C1-2) having a density in the range of 865 to 875 kg / m 3 .
  • the ethylene / ⁇ -olefin random copolymer (C1-1) is preferably a polymer having at least one of the following physical properties (c-1a) to (c-1c).
  • an ethylene / ⁇ -olefin random copolymer (C1-1) an ethylene / ⁇ -olefin random copolymer having the physical properties of (c1-1a), (c1-1b), or (c1-1c) (C1-1) and further physical properties of (c1-1a) and (c1-1b), physical properties of (c1-1a) and (c1-1c), or (c1-1b) and (c1-1c)
  • the ethylene / propylene random copolymer (C1-2) is preferably a polymer having at least one of the following physical properties (c1-2a) and (c1-2b).
  • crystallinity by X-ray is less than 5% amorphous or slightly crystalline
  • Such an ethylene / propylene random copolymer (C1-2) includes an ethylene / propylene random copolymer (C1-2) having the physical properties of (c1-2a) or (c1-2b),
  • the ethylene / ⁇ -olefin random copolymer (C-1) has an ethylene content of 85 to 93 mol%, X-rays in consideration of the heat-sealing characteristics of the resulting easy-open laminated film.
  • Low crystalline ethylene ⁇ - having a melting point in the range of 60 to 90 ° C.
  • composition determined from an endothermic curve with a crystallinity of 7 to 30% and a differential scanning calorimeter (DSC) at a heating rate of 10 ° C./min Olefin random copolymer (C1-1) and ethylene / propylene random having an amorphous content or a slight crystallinity in which ethylene content is in the range of 75 to 85 mol% and crystallinity by X-ray is less than 5%
  • a composition (mixture) comprising the copolymer (C1-2) is preferred.
  • Examples of the ethylene / ⁇ -olefin random copolymer (C-1) according to the present invention include the propylene polymer (A-1), the ethylene polymer (B-1), and a tackifier resin (D described later).
  • the melt flow rate (MFR) (ASTM D1238, 190 ° C., 2160 g load) is not particularly limited as long as it has film-forming ability.
  • the melt flow rate (MFR) is preferably 0.01 to 20 g / 10 min.
  • the ethylene / ⁇ -olefin random copolymer (C-1) according to the present invention comprises, for example, a transition metal compound catalyst component, for example, a catalyst comprising a vanadium compound or a zirconium compound and an organoaluminum compound catalyst component, It can be obtained by copolymerizing an ⁇ -olefin.
  • a transition metal compound catalyst component for example, a catalyst comprising a vanadium compound or a zirconium compound and an organoaluminum compound catalyst component, It can be obtained by copolymerizing an ⁇ -olefin.
  • the tackifier resin (D-1) which is one of the constituent components of the olefin polymer composition (E) that serves as the heat-sealing layer of the easy-open laminate film of the present invention, is manufactured and sold as a tackifier.
  • Examples of the aliphatic hydrocarbon resin include polymerization of a fraction containing at least one mono- or diolefin having 4 to 5 carbon atoms, such as 1-butene, isobutene, butadiene, 1,3-pentadiene, and isoprene.
  • the resulting resin can be mentioned.
  • alicyclic hydrocarbon resins include resins obtained by polymerization after dimerization of diene components in spent C4 to C5 fractions, resins obtained by polymerizing cyclic monomers such as cyclopentadiene, aromatic carbonization Examples thereof include a resin obtained by hydrogenating a hydrogen resin.
  • aromatic hydrocarbon resins include resins obtained by polymerizing a fraction containing at least one C8-C10 vinyl aromatic hydrocarbon such as vinyltoluene, indene, ⁇ -methylstyrene, or the like. And resins obtained by copolymerizing the above aliphatic hydrocarbon fractions.
  • polyterpene resins include ⁇ -pinene polymers, ⁇ -pinene polymers, dipentene polymers, terpene / phenol copolymers, ⁇ -pinene / phenol copolymers, and hydrogenated products thereof. it can.
  • rosins include rosins such as gum rosin, wood rosin and tall oil, and modified products thereof. Examples of modified products include those subjected to modification such as hydrogenation, disproportionation, dimerization, and esterification. it can.
  • Styrenic hydrocarbon resins are low molecular weight resinous polymers obtained by polymerizing one or more styrene monomers such as high-purity styrene, vinyltoluene, ⁇ -methylstyrene, and isopropyltoluene. Can be mentioned.
  • the olefin polymer composition (E) according to the present invention is used as an easily openable sealing material for food and beverage packaging, the fragrance is considered in consideration of odorlessness, food hygiene, miscibility with other components, etc. It is preferable to use a resin obtained by intra-nuclear hydrogenation of a group hydrocarbon resin or a polyterpene resin.
  • the ethylene polymer (B-2) which is one of the components of the ethylene polymer composition (F) constituting the intermediate layer of the easy-open laminated film of the present invention, has a density of 940 to 970 kg / m 3 , Preferably, a homopolymer of ethylene in the range of 945 to 967 kg / m 3 or ethylene and a small amount of an ⁇ -olefin having 3 to 10 carbon atoms such as propylene, 1-butene, 1-heptene, 1-hexene, 1 -Random copolymer with octene, 4-methyl-1-pentene, etc., and is usually a polymer mainly composed of ethylene manufactured and sold as high density polyethylene (HDPE).
  • HDPE high density polyethylene
  • the melt flow rate (MFR) (ASTM D1238, 190 ° C., 2160 g load) of the ethylene-based polymer (B-2) according to the present invention is ethylene mixed with a high-pressure method low-density polyethylene (B-3) described later.
  • the polymer composition (F) is not particularly limited as long as it has a film-forming ability, but is usually in the range of 0.01 to 100 g / 10 minutes, preferably 0.1 to 70 g / 10 minutes.
  • the high-pressure low-density polyethylene (B-3) which is one of the components of the ethylene polymer composition (F) constituting the intermediate layer of the easy-open laminate film of the present invention, has a density of 905 to 935 kg / m 3. Preferably, it is in the range of 910 to 925 kg / m 3 .
  • the high-pressure method low-density polyethylene (B-3) is an ethylene homopolymer usually produced and sold as a high-pressure method low-density polyethylene (HP-LDPE), or a copolymer of ethylene and a small amount of vinyl acetate. It is a polymer.
  • the melt flow rate (MFR) (ASTM D1238, 190 ° C., 2160 g load) of the high-pressure method low-density polyethylene (B-3) according to the present invention is an ethylene-based mixture obtained by mixing with the ethylene-based polymer (B-2).
  • the polymer composition (F) is not particularly limited as long as it has a film-forming ability, but is usually in the range of 0.01 to 100 g / 10 minutes, preferably 0.1 to 70 g / 10 minutes.
  • the ethylene polymer (B-4) constituting the laminate layer of the easy-open laminate film of the present invention has a density of 900 to 950 kg / m 3 , preferably 920 to 940 kg / m 3 , and ethylene and carbon number Is a random copolymer with 4 to 10 ⁇ -olefin, such as 1-butene, 1-heptene, 1-hexene, 1-octene, 4-methyl-1-pentene, etc., usually linear or linear It is a polymer mainly composed of ethylene and manufactured and sold as a low-density polyethylene (L-LDPE).
  • L-LDPE low-density polyethylene
  • the ethylene polymer (B-4) according to the present invention is preferably a random copolymer of ethylene and an ⁇ -olefin having 4 or more carbon atoms.
  • the melt flow rate (MFR) (ASTM D1238, 190 ° C., 2160 g load) of the ethylene-based polymer (B-4) according to the present invention is not particularly limited as long as it has a film-forming ability. It is in the range of 100 g / 10 min, preferably 0.1 to 70 g / 10 min.
  • a polymer including other ethylene polymers may be used in combination.
  • the other polymer is generally a laminate layer.
  • the content of the polymer component is less than 50% by mass, of which 30% by mass or less, and more preferably 10% by mass or less.
  • additives can be blended in the ethylene polymer (B-4) according to the present invention as long as the object of the present invention is not impaired. Examples of such additives include inorganic fillers such as silica and talc, antioxidants, weathering stabilizers, antistatic agents, antifogging agents, antiblocking agents, slip agents, and pigments.
  • an organic compound type anti-blocking agent or slip agent is also effective in improving workability and workability during film forming, laminating, and packaging operations.
  • organic compound type anti-blocking agents and slip agents include palmitic acid amide, stearic acid amide, behenic acid amide, oleic acid amide, erucic acid amide, oleyl palmamide, stearyl palmamide, methylenebisstearylamide, methylene
  • examples thereof include various amides such as bisoleylamide, ethylenebisoleylamide, and ethylenebiserucamide, polyalkylene glycols such as polyethylene glycol and polypropylene glycol, and hydrogenated castor oil.
  • ⁇ Olefin polymer composition (E)> The olefin polymer composition (E) that forms the heat-sealing layer of the easy-open laminate film of the present invention, 79.8 to 94% by mass of the propylene polymer (A-1), Preferably 81.1 to 91.3% by mass, 4 to 10% by mass of the ethylene polymer (B-1), Preferably 5.5 to 9% by mass, 1.5 to 7.5% by mass of the ethylene / ⁇ -olefin random copolymer (C-1), Preferably 2.5 to 7.5% by mass, And 0.5 to 2.7% by mass of the tackifier resin (D-1), Preferably 0.7 to 2.4 mass% [However, (A-1) + (B-1) + (C-1) + (D-1) 100 mass%) It is a composition containing.
  • the propylene polymer (A-1), the ethylene polymer (B-1), the ethylene / ⁇ -olefin random copolymer (C-1) body, and the olefin polymer composition (E) When a composition in which the tackifying resin (D-1) satisfies the above range is used, the resulting easy-open laminated film has an excellent balance between easy-open property and sealing strength.
  • additives can be blended with the olefin polymer composition (E) according to the present invention as long as the object of the present invention is not impaired.
  • additives include inorganic fillers such as silica and talc, antioxidants, weathering stabilizers, antistatic agents, antifogging agents, antiblocking agents, slip agents, and pigments.
  • the compounding of an organic compound type anti-blocking agent or slip agent is also effective in improving workability and workability during film forming, laminating, and packaging operations.
  • organic compound type anti-blocking agents and slip agents examples include palmitic acid amide, stearic acid amide, behenic acid amide, oleic acid amide, erucic acid amide, oleyl palmamide, stearyl palmamide, methylenebisstearylamide, methylene
  • examples thereof include various amides such as bisoleylamide, ethylenebisoleylamide, and ethylenebiserucamide, polyalkylene glycols such as polyethylene glycol and polypropylene glycol, and hydrogenated castor oil.
  • the olefin polymer composition (E) comprises a propylene polymer (A-1), an ethylene polymer (B-1), an ethylene / ⁇ -olefin random copolymer (C-1) and Each component of the tackifying resin (D-1) and an additive that is optionally blended can be prepared by mixing simultaneously or sequentially.
  • other polymers such as ethylene polymers may be used in combination.
  • the other polymer is generally 50% by mass of the polymer component constituting the heat-sealing layer. Among them, it is 30% by mass or less, more preferably 10% by mass or less.
  • it is preferable to melt and mix using a single screw extruder, a twin screw extruder, a Banbury mixer, various kneaders, etc., and the mixing order is not particularly limited.
  • ⁇ Ethylene polymer composition (F)> The ethylene-based polymer composition (F) that forms the intermediate layer of the easy-open laminate film of the present invention, 50 to 95% by mass of the ethylene polymer (B-2), Preferably 70 to 92% by mass, And 5-50% by mass of the high pressure method low density polyethylene (B-3), Preferably 8-30% by mass [However, (B-2) + (B-3) 100 mass%. ] It is a composition containing. When a composition having an ethylene polymer (B-2) amount of less than 50% by mass is used as the intermediate layer, the film-forming property of the resulting easy-open laminated film is reduced, film strength, heat resistance, etc. Other than the easy open function, there is a risk of inferiority.
  • a polymer such as an ethylene polymer other than these may be used in combination.
  • the other polymer is generally less than 50% by mass of the polymer component constituting the intermediate layer, of which 30% by mass or less, and more preferably 10% by mass or less.
  • additives can be blended in the ethylene-based polymer composition (F) constituting the intermediate layer according to the present invention as long as the object of the present invention is not impaired.
  • additives may include inorganic fillers such as silica and talc, antioxidants, weathering stabilizers, antistatic agents, antifogging agents, antiblocking agents, slip agents, pigments and the like.
  • an organic compound type anti-blocking agent or slip agent is also effective in improving workability and workability during film forming, laminating, and packaging operations.
  • organic compound type anti-blocking agents and slip agents include palmitic acid amide, stearic acid amide, behenic acid amide, oleic acid amide, erucic acid amide, oleyl palmamide, stearyl palmamide, methylenebisstearylamide, methylene
  • examples thereof include various amides such as bisoleylamide, ethylenebisoleylamide, and ethylenebiserucamide, polyalkylene glycols such as polyethylene glycol and polypropylene glycol, and hydrogenated castor oil.
  • the easy-open laminate film of the present invention includes a heat-sealing layer composed of the olefin polymer composition (E), an intermediate layer composed of the ethylene polymer composition (F), and the ethylene heavy layer. It consists of a laminate layer composed of the union (B-4). As long as the intermediate layer constituting the easy-open laminate film of the present invention is composed of the ethylene polymer composition (F), it may be composed of one layer or two or more layers.
  • the thickness of the easy-open laminated film of the present invention is variously determined depending on the application.
  • the thickness of the heat-sealing layer is usually 1 to 80 ⁇ m, preferably 2 to 50 ⁇ m, The thickness is 8 to 498 ⁇ m, preferably 16 to 96 ⁇ m, the thickness of the laminate layer is 1 to 80 ⁇ m, preferably 2 to 50 ⁇ m, and the total thickness of the easy-open laminated film is 10 to 500 ⁇ m, preferably It is in the range of 20-100 ⁇ m.
  • the easy-open laminate film of the present invention is a surface of a laminate layer, for example, corona treatment, flame treatment, plasma treatment, undercoat treatment, etc., in order to improve the printability or adhesion with a base material layer.
  • An activation process may be performed.
  • the easy-open laminated film of the present invention can be laminated with a base material layer and used for various applications.
  • stacked with the laminate layer of the easily openable laminated film of this invention consists of a sheet-like or film-like thing which consists of thermoplastic resins, paper, aluminum foil, etc.
  • the thermoplastic resin include various known thermoplastic resins such as polyolefin (polyethylene, polypropylene, poly-4-methyl / 1-pentene, polybutene, etc.), polyester (polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate).
  • thermoplastic resins having good stretchability and transparency such as polypropylene, polyethylene terephthalate, and polyamide, are preferable.
  • the substrate made of such a thermoplastic resin film may be an unstretched film or a stretched film, and a laminate of one or more coextruded products, extruded laminate products, dry laminate products, etc. It may be the body.
  • the base material layer in order to improve the adhesiveness of one side or both sides of the base material layer with the laminate layer of the easy-open laminate film of the present invention, for example, corona treatment, flame treatment, plasma treatment, undercoat treatment, frame treatment, etc.
  • the surface activation treatment may be performed.
  • the thickness of the base material layer is usually in the range of 5 to 1000 ⁇ m, preferably 9 to 100 ⁇ m.
  • the olefin polymer composition (E) having the above composition constituting the heat-sealing layer may be prepared in advance, or the propylene polymer (A-1), A predetermined amount of the ethylene polymer (B-1), the ethylene / ⁇ -olefin random copolymer (C-1), and the tackifier resin (D-1) may be weighed and directly fed to the film forming machine.
  • an ethylene polymer composition (F) having the above composition may be prepared in advance for the intermediate layer, or an ethylene polymer (B-2) and a high-pressure method low density polyethylene (B-3) may be prepared. A predetermined amount may be measured and put directly into the film forming machine. Such laminated films may be individually laminated after being molded, but the method of coextrusion molding using a multilayer die having at least a three-layer structure is most preferable.
  • the easy-open laminated film or the easy-open laminated film laminated with the base material layer of the present invention can be used as various packaging materials.
  • An example of a suitable packaging material is a container lid that uses a heat-sealing layer as the container innermost layer.
  • the easy-open laminated film may be used as it is as a lid material, or may be printed and used. Further, it may be bonded to paper that is printed or not, aluminum foil, or the like to form a lid. Further, depending on the application, it may be cut in advance according to the shape of the container to form a lid.
  • the easy-open laminated film of the present invention can form a heat seal layer by heat-sealing to various adherends.
  • adherends include a propylene polymer, polystyrene, polyester, polycarbonate, polyvinyl chloride and the like. These adherends can be of various shapes such as films, sheets, trays, cups, bottles and the like.
  • a propylene-based polymer is particularly preferably used as the adherend because it is excellent in the sealing property, easy-opening property, heat resistance, oil resistance and the like of the heat seal layer.
  • propylene-based polymers are in the same category as the propylene-based polymer (A-1), but the individual physical properties may be the same or different.
  • a propylene polymer formed into various shapes such as a film, a sheet, a tray, a cup, and a bottle by a known method according to the packaging material should be used.
  • Can do In the case of a film or a sheet, it can be produced by the same method as that for the easy-open laminated film.
  • a tray or a cup In the case of a tray or a cup, it can be produced by once producing a sheet by the above method and then forming a container such as a tray or a cup by thermoforming such as vacuum forming or pressure forming.
  • a cup or bottle it can be molded as a container by injection molding, injection hollow molding (injection blow), hollow molding or the like.
  • the easy-open laminated film of the present invention When the easy-open laminated film of the present invention is used as a packaging material, for example, the easy-open laminated film itself can be folded and sealed in three directions, or two easy-open laminated films can be sealed in four directions to form a package. Alternatively, the easy-open laminated film may be formed with the above-mentioned various adherends and a heat seal layer to form a package.
  • the shape of the package of the present invention can take various shapes depending on the shape, form or application of the material to be packaged.
  • a packaging material is filled in a three-sided sealing bag composed of an easy-open laminated film and a film having a heat sealing layer composed of a propylene-based polymer layer, and then the mouth is heat sealed.
  • a heat sealing layer made of a propylene polymer layer
  • a four-side sealed package After filling the material to be packaged into a sheet, tray, cup, bottle, etc. having a heat sealing layer made of a propylene polymer layer, a four-side sealed package, and then a heat-sealing layer of an easy-open laminated film
  • Examples thereof include a package body in which the upper surface is sealed with a lid material (seal material) serving as the innermost layer.
  • the manufacturing method of the following package bodies can be provided.
  • the olefin polymer is used by using the easily peelable laminated film of the present invention as a lid.
  • the heat sealing layer of the plastic container which is the surface opposite to the heat-sealing layer composed of the composition (E), has a surface temperature of 160 ° C. to 210 ° C., preferably 170 ° C. to 200 ° C. The method of heat-sealing can be illustrated.
  • Propylene polymer (A-1) (1-1) Propylene / ethylene random copolymer (R-PP-1): Density; 910 kg / m 3 , Melt flow rate (MFR) (230 ° C.); 9 g / 10 minutes, Melting point: 115 ° C.
  • R-PP-2 Propylene / ethylene / 1-butene random copolymer
  • Ethylene polymer (B-1) High density polyethylene (HDPE-1): Density; 954 kg / m 3 , MFR (190 ° C.); 1.1 g / 10 min; Melting point: 132 ° C.
  • HDPE-1 High density polyethylene
  • Ethylene / ⁇ -olefin random copolymer (C-1) (3-1) Ethylene / 1-butene random copolymer (EBR): Ethylene content; 89.1 mol%; Crystallinity: 10%, Density; 886 kg / m 3 , MFR (190 ° C.); 4.0 g / 10 min.
  • EBR Ethylene / 1-butene random copolymer
  • EBR 1-butene random copolymer
  • Crystallinity 10%, Density; 886 kg / m 3 , MFR (190 ° C.); 4.0 g / 10 min.
  • Tackifying resin D-1 Hydrogenated aromatic hydrocarbon resin (Arcon) (manufactured by Arakawa Chemical Co., Ltd., trade name: Alcon P115, Ring Ball Method Softening Point 115 ° C.)
  • Ethylene polymer (B-2) High density polyethylene (HDPE-2): Density; 954 kg / m 3 , MFR (190 ° C.); 1.1 g / 10 minutes, Melting point: 132 ° C. (6) High pressure method low density polyethylene (B-3) High pressure low density polyethylene (HP-LDPE): Density; 917 kg / m 3 , MFR; 7.2 g / 10 min.
  • Ethylene polymer (B-4) Linear or linear low density polyethylene (L-LDPE) Ethylene 4-methyl-1-pentene random copolymer (this belongs to L-LDPE): Density; 935 kg / m 3 , MFR; 2.3 g / 10 minutes, Melting point: 124 ° C.
  • L-LDPE Linear or linear low density polyethylene
  • the physical properties of the heat-fusible laminated films obtained in the examples and comparative examples of the present invention were measured by the following methods.
  • (1) Evaluation of easy peelability In order to evaluate easy peelability, a 12 ⁇ m thick biaxially stretched polyethylene terephthalate film (PET) was subjected to corona treatment of the films obtained in each of the Examples and Comparative Examples.
  • a laminated film was prepared by laminating by dry lamination using a urethane adhesive on the surface, and a polypropylene sheet having a thickness of 300 ⁇ m was prepared as a heat seal layer.
  • the heat-sealing layer and the polypropylene sheet of each laminated film were overlapped, and sealed at a predetermined temperature shown in Table 1 at a pressure of 0.2 MPa for 1 second using a sealer having a width of 5 mm. And then left to cool. Thereafter, the heat-sealed test specimen was treated at 115 ° C. for 30 minutes using a high-temperature and high-pressure sterilizer (retort treatment equipment), and then the specimen was cooled. A test piece having a width of 15 mm was cut from this, and the heat seal portion was peeled off at a crosshead speed of 500 mm / min, and the strength thereof was defined as heat seal strength (N / 15 mm).
  • the evaluation of easy peelability was evaluated as ⁇ when the heat seal strength did not exceed 15.0 N / 15 mm, and it was not peeled off in a thread-like manner or a film form due to delamination with a tendency to cohesive peeling. Even if the heat seal strength exceeded 15.0 N / 15 mm even if the peeled state had no problem, it was rated as ⁇ . The case where the heat seal strength exceeded 15.0 N / 15 mm and a tendency to complete sealing was indicated as x.
  • sealing strength The strength at the time of peeling from the material seal portion or cutting the edge and opening was defined as sealing strength (Mpa). This measurement was evaluated using a sealing strength measuring instrument (JIS-Z0238 compliant) manufactured by Sun Science Co., Ltd. The sealing evaluation was evaluated as “ ⁇ ” when the average strength was 0.045 MPa or more and “ ⁇ ” when the average was less than 0.045 MPa.
  • the peeled state is not threaded or filmy and does not peel off, the heat seal strength does not exceed 15.0 N / 15 mm, and the average value of the sealing strength is 0.045 MPa or more.
  • the thing was ⁇ .
  • the case where the peeled state was peeled off in a stringy manner or in the form of a film, or the heat seal strength, which tends to be completely sealed, exceeding 20 N / 15 mm was marked as x.
  • a heat seal strength exceeding 15.0 N / 15 mm or a seal strength of 0.045 MPa or less was indicated by ⁇ .
  • An olefin polymer composition (E) prepared by adjusting the R-PP-1, R-PP-2, HDPE-1, EBR, EPR, and alkone with the blending amounts shown in Table 1 as a heat-sealing layer.
  • An intermediate polymer layer (F) obtained by dry blending 85% by mass of HDPE-2 and HP-LDPE; 15% by mass was used as an intermediate layer, and L-LDPE was used as a laminate layer.
  • the physical properties of the obtained easily openable laminated film were measured by the method described above. The results are shown in Table 1.
  • the physical properties of the obtained easily openable laminated film were measured by the method described above. The results are shown in Table 2.
  • Laminated films similar to those of Comparative Examples 1 to 3 were obtained except that an ethylene polymer composition comprising 100% by mass of HDPE-2 was used. The results are shown in Table 2.
  • the easy-open laminate films obtained in Examples 1 to 5 have a heat-sealing strength of about 10 to 15 N / 15 mm and are easy to open, with no peeling or stringing, and a clean state.
  • the sealing strength was high even though the contents were at a high temperature of about 60 ° C.
  • the easy-open laminated films obtained in Comparative Examples 1 to 4 have a high heat seal strength of about 18 to 38 N / 15 mm and are not suitable as easy open films. If the strength is weak and the contents are transferred at a high temperature, leakage may occur during the transfer.
  • the easy-open laminate film of the present invention is a packaging film as it is as an easy-open laminate film having low-temperature heat sealability, blocking resistance, impact resistance suitable for packaging materials, slip properties, rigidity, transparency, etc.
  • it is suitable as a lid material for polypropylene sheets, trays, cups, bottles, etc., packaging for snacks such as rice crackers, potato chips, etc., or food packaging such as jelly, milk, yogurt, pudding, tofu, lactic acid beverages, etc.
  • containers made of polypropylene such as pulp jelly, pudding, tofu, and other various container lid packaging using this easy-open laminated film, and packaging such as vertical and horizontal pillow bags that do not use containers are high. It has sealing properties and sealing properties and is suitable as a packaging material.

Landscapes

  • Wrappers (AREA)
  • Packages (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne un film stratifié facile à ouvrir comprenant une couche thermofusible constituée d'une composition (E) de polymère d'oléfine, une couche intermédiaire constituée d'une composition (F) de polymère d'éthylène, et une couche stratifiée constituée d'un polymère d'éthylène (B-4). La composition (E) de polymère d'oléfine comprend un polymère de propylène (A-1), un polymère d'éthylène (B-1), un copolymère statistique (C-1) d'éthylène-α-oléfine et une résine (D-1) conférant une adhérence. La composition (F) de polymère d'éthylène comprend un polymère d'éthylène (B-2) et un polyéthylène basse densité traité haute pression (B-3). Le film stratifié facile à ouvrir présente une résistance d'étanchéité pouvant résister à la pression de l'extérieur (pression externe) et à la pression de l'intérieur (pression interne), même lorsque le joint, c'est-à-dire l'enveloppe, est à une température supérieure à la température ambiante, tout en conservant d'excellentes propriétés d'étanchéité et d'ouverture facile.
PCT/JP2014/068043 2013-07-09 2014-07-07 Film stratifié facile à ouvrir et son utilisation WO2015005279A1 (fr)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020163635A (ja) * 2019-03-28 2020-10-08 大日本印刷株式会社 樹脂フィルム、積層体、蓋材および蓋付き容器
JP2020168840A (ja) * 2019-04-05 2020-10-15 大日本印刷株式会社 易静音剥離性積層体およびそれを用いた易静音開封性の蓋材と容器
WO2021014966A1 (fr) * 2019-07-23 2021-01-28 Dic株式会社 Film stratifié, film laminé, et emballage
JP2021095162A (ja) * 2019-12-16 2021-06-24 ジェイフィルム株式会社 易開封性フィルムおよび包装体
JP2021133590A (ja) * 2020-02-26 2021-09-13 ジェイフィルム株式会社 易開封性フィルムおよび包装体
EP3943297A4 (fr) * 2019-03-22 2022-04-20 Mitsubishi Chemical Corporation Structure multicouche et sachet tenant debout comprenant une telle structure multicouche
WO2023095618A1 (fr) * 2021-11-24 2023-06-01 三井化学株式会社 Film stratifié, récipient, récipient de culture cellulaire, procédé de culture cellulaire et procédé de fabrication de récipient de culture cellulaire

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63179741A (ja) * 1987-01-22 1988-07-23 昭和電工株式会社 易剥離性とヒ−トシ−ル性を併わせ持つ複合フイルム
WO2004104088A1 (fr) * 2003-05-26 2004-12-02 Du Pont-Mitsui Polychemicals Co., Ltd. Preparations a base de polymere olefinique et agents de scellement pelables fabriques facilement au moyen de celles-ci
JP2005028679A (ja) * 2003-07-10 2005-02-03 Tohcello Co Ltd 易開封性積層フイルム及びその用途
JP2005178216A (ja) * 2003-12-19 2005-07-07 Toyobo Co Ltd ポリプロピレン系多層シーラントフィルム、およびそのシーラントフィルムを用いたラミネートフィルム
WO2009123286A1 (fr) * 2008-04-03 2009-10-08 東セロ株式会社 Film multicouche thermofusible
JP2011162679A (ja) * 2010-02-10 2011-08-25 Du Pont Mitsui Polychem Co Ltd 液晶ポリマー用ヒートシール性樹脂組成物、液晶ポリマー用ヒートシール材、蓋材

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63179741A (ja) * 1987-01-22 1988-07-23 昭和電工株式会社 易剥離性とヒ−トシ−ル性を併わせ持つ複合フイルム
WO2004104088A1 (fr) * 2003-05-26 2004-12-02 Du Pont-Mitsui Polychemicals Co., Ltd. Preparations a base de polymere olefinique et agents de scellement pelables fabriques facilement au moyen de celles-ci
JP2005028679A (ja) * 2003-07-10 2005-02-03 Tohcello Co Ltd 易開封性積層フイルム及びその用途
JP2005178216A (ja) * 2003-12-19 2005-07-07 Toyobo Co Ltd ポリプロピレン系多層シーラントフィルム、およびそのシーラントフィルムを用いたラミネートフィルム
WO2009123286A1 (fr) * 2008-04-03 2009-10-08 東セロ株式会社 Film multicouche thermofusible
JP2011162679A (ja) * 2010-02-10 2011-08-25 Du Pont Mitsui Polychem Co Ltd 液晶ポリマー用ヒートシール性樹脂組成物、液晶ポリマー用ヒートシール材、蓋材

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3943297A4 (fr) * 2019-03-22 2022-04-20 Mitsubishi Chemical Corporation Structure multicouche et sachet tenant debout comprenant une telle structure multicouche
US11738543B2 (en) 2019-03-22 2023-08-29 Mitsubishi Chemical Corporation Multilayer structure, and standup pouch including the multilayer structure
JP2020163635A (ja) * 2019-03-28 2020-10-08 大日本印刷株式会社 樹脂フィルム、積層体、蓋材および蓋付き容器
JP2020168840A (ja) * 2019-04-05 2020-10-15 大日本印刷株式会社 易静音剥離性積層体およびそれを用いた易静音開封性の蓋材と容器
JP7383900B2 (ja) 2019-04-05 2023-11-21 大日本印刷株式会社 易静音剥離性積層体およびそれを用いた易静音開封性の蓋材と容器
WO2021014966A1 (fr) * 2019-07-23 2021-01-28 Dic株式会社 Film stratifié, film laminé, et emballage
JPWO2021014966A1 (ja) * 2019-07-23 2021-10-07 Dic株式会社 積層フィルム、ラミネートフィルム及び包装体
JP7036281B2 (ja) 2019-07-23 2022-03-15 Dic株式会社 積層フィルム、ラミネートフィルム及び包装体
JP2021095162A (ja) * 2019-12-16 2021-06-24 ジェイフィルム株式会社 易開封性フィルムおよび包装体
JP7449688B2 (ja) 2019-12-16 2024-03-14 ジェイフィルム株式会社 易開封性フィルムおよび包装体
JP2021133590A (ja) * 2020-02-26 2021-09-13 ジェイフィルム株式会社 易開封性フィルムおよび包装体
WO2023095618A1 (fr) * 2021-11-24 2023-06-01 三井化学株式会社 Film stratifié, récipient, récipient de culture cellulaire, procédé de culture cellulaire et procédé de fabrication de récipient de culture cellulaire

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TWI625238B (zh) 2018-06-01
TW201505837A (zh) 2015-02-16
KR20150133802A (ko) 2015-11-30
JP5968543B2 (ja) 2016-08-10
KR101749854B1 (ko) 2017-06-21

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