WO2015012012A1 - Feuille de résine thermoplastique, et récipient produit à partir de celle-ci - Google Patents

Feuille de résine thermoplastique, et récipient produit à partir de celle-ci Download PDF

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Publication number
WO2015012012A1
WO2015012012A1 PCT/JP2014/065538 JP2014065538W WO2015012012A1 WO 2015012012 A1 WO2015012012 A1 WO 2015012012A1 JP 2014065538 W JP2014065538 W JP 2014065538W WO 2015012012 A1 WO2015012012 A1 WO 2015012012A1
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WIPO (PCT)
Prior art keywords
resin
styrene
layer
mass
thermoplastic resin
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/JP2014/065538
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English (en)
Japanese (ja)
Inventor
正 澤里
中里　利勝
裕志 廣川
武井　淳
利生 長野
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Denka Co Ltd
Original Assignee
Denki Kagaku Kogyo KK
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Filing date
Publication date
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Priority to JP2015528190A priority Critical patent/JP6460989B2/ja
Priority to CN201480042118.9A priority patent/CN105658723B/zh
Publication of WO2015012012A1 publication Critical patent/WO2015012012A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/06—Polystyrene
    • 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
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/40—Closed containers
    • 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
    • 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
    • B32B2439/80—Medical packaging
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
    • C08J2325/02—Homopolymers or copolymers of hydrocarbons
    • C08J2325/04—Homopolymers or copolymers of styrene

Definitions

  • the present invention relates to a thermoplastic resin sheet and its container.
  • Polystyrene sheets are widely used for various packaging materials such as food containers, beverage containers, industrial containers (including various trays), and blister packs.
  • food containers such as oil-based snack foods and dairy products need water vapor barrier properties.
  • Styrenic resin layers are used as both outer layers, and an olefinic resin layer such as polypropylene is provided in the inside through an adhesive layer to provide water vapor barrier properties and suppress deterioration in quality due to moisture absorption of the contents and flavor.
  • Patent Documents 1 to 4 describe multilayer resin sheets having a polyester resin layer as an inner layer in order to impart storage stability.
  • JP 2000-351186 A JP 2000-263729 A JP-A-11-138705 JP-A-11-58632
  • the aforementioned multilayer resin sheet needs to be provided with an adhesive layer between them in order to laminate the styrene resin layer and the water vapor barrier layer.
  • the raw material for the adhesive layer is generally expensive, it is desirable not to provide an adhesive layer in order to achieve excellent versatility, and to achieve good water vapor barrier properties and interlayer adhesion with a styrene resin layer.
  • a polyolefin resin is one of the highly versatile resins used for the water vapor barrier layer.
  • polyolefin resin has high toughness, multilayer sheets containing polyolefin resin are not suitable for food containers that require the ability to easily break at the notch introduction part such as a potion container (hereinafter referred to as notch cracking performance). It becomes difficult to apply.
  • the polyolefin resin layer is placed in the vicinity of the styrene resin layer near the notch forming surface of the sheet, and the notch is cut at the same time as the notch is cut, thereby ensuring the notch cracking performance.
  • a form in which the notch is linearly formed and a form in which the notch is entered in a broken line form (this form has a form in which a part where the notch enters and a part where the notch does not enter coexist. Etc.).
  • a notch is formed in a broken line shape, there is a region where the olefin-based resin layer is not completely cut off.
  • the present invention has been made in view of the above circumstances, and provides a thermoplastic resin sheet having even better water vapor barrier properties while ensuring good moldability, practical strength, and sealing strength with a lid. With the goal. In addition, it can be manufactured at a lower cost than conventional multilayer sheets with a water vapor barrier resin layer disposed through an adhesive layer, and has excellent notch cracking performance that is compatible with various notch types.
  • An object is to provide a thermoplastic resin sheet. Furthermore, it aims also at providing the container formed using the said thermoplastic resin sheet.
  • the present inventor used a mixed resin in which an olefin resin is dispersed and mixed in a styrene resin, and the mass of polystyrene contained in the styrene resin.
  • the average molecular weight is 270000 to 370000, sufficient interlayer adhesion can be achieved without interposing an adhesive layer of different types of resin, and it has excellent water vapor barrier properties and supports various notch types.
  • the inventors have found that it is possible to obtain a thermoplastic resin sheet that realizes possible excellent notch cracking performance, and have completed the present invention.
  • thermoplastic resin sheet comprising a mixed resin layer containing a styrene resin and an olefin resin as resin components, wherein the styrene resin in the thermoplastic resin sheet is 70 to 95% by mass.
  • thermoplastic resin sheet comprising polystyrene having an olefin resin content of 30 to 5% by mass and a styrene resin of the mixed resin layer having a mass average molecular weight of 270000 to 370000.
  • the styrene resin of the mixed resin layer further includes high impact polystyrene and a styrene thermoplastic elastomer in addition to the polystyrene.
  • the styrene resin of the mixed resin layer contains 10 to 70% by mass of the polystyrene as a resin component, 5 to 70% by mass of high impact polystyrene, and 1 to 10% by mass of styrenic heat. And a plastic elastomer.
  • the styrenic thermoplastic elastomer is a hydrogenated product of a copolymer of styrene and butadiene, a hydrogenated product of a copolymer of styrene and isoprene, or a hydrogenated product of a copolymer of styrene, butadiene and isoprene. Or at least one selected from the group consisting of styrene-vinyl isoprene copolymers.
  • the olefin resin is polypropylene.
  • a styrene resin layer containing a styrene resin is laminated on the mixed resin layer.
  • the styrene resin contained in the styrene resin layer is at least one resin selected from the group consisting of polystyrene, high impact polystyrene, and styrene-butadiene copolymer.
  • an intermediate layer is interposed between the mixed resin layer and the styrene resin layer, and the intermediate layer includes polystyrene, high impact polystyrene, and a styrene thermoplastic elastomer, and an olefin resin. And the intermediate layer has an olefinic resin content of 3 to 15% by mass.
  • the ratio of the thickness of the mixed resin layer, the intermediate layer, and the styrene resin layer is 50 to 90% / 5 to 25% / 5 to 25%. It is. In a preferred embodiment, the thickness of the sheet is 0.2 mm to 3 mm.
  • thermoplastic resin sheet formed by molding the thermoplastic resin sheet.
  • thermoplastic resin sheet of the present invention By using the thermoplastic resin sheet of the present invention, it achieves good moldability, practical strength and sealing strength with the lid material without delamination, and also supports good water vapor barrier properties and various notch types It is possible to achieve both of the excellent notch crackability possible. Moreover, since the said characteristic is implement
  • thermoplastic resin sheet according to the present invention essentially includes a mixed resin layer containing a styrene resin and an olefin resin, but whether or not to include another layer, includes any layer when including another layer.
  • Various embodiments are taken. Hereinafter, various embodiments of the thermoplastic resin sheet will be described, and then the manufacture of the thermoplastic resin sheet and the container will be described, but if the specific description of one embodiment applies to other embodiments, The description is omitted in other embodiments.
  • thermoplastic resin sheet according to the first embodiment of the present invention is a single-layer thermoplastic resin sheet composed of only a mixed resin layer containing a styrene resin and an olefin resin as resin components, and the thermoplastic resin sheet A thermoplastic resin sheet containing polystyrene having a styrene resin content of 70 to 95% by mass, an olefin resin content of 30 to 5% by mass, and a styrene resin of the mixed resin layer having a mass average molecular weight of 270000 to 370000. It is.
  • the mixed resin layer is an important layer for imparting water vapor barrier properties to the sheet, and is basically formed from a resin mixture of a styrene resin and an olefin resin.
  • the mixed resin layer may be a single layer or a multilayer.
  • Styrene resins include polystyrene, poly ⁇ -methylstyrene, polyvinyl naphthalene, polyvinyl anthracene, high impact polystyrene, styrene and acrylate copolymers, styrene and methacrylate copolymers, and styrene and butadiene.
  • Copolymer or hydrogenated product thereof copolymer of styrene and isoprene or hydrogenated product thereof, copolymer of styrene, butadiene and isoprene or hydrogenated product thereof, copolymer of styrene-vinylisoprene or hydrogenated product thereof And styrene-based thermoplastic elastomers.
  • polystyrene high impact polystyrene
  • styrene thermoplastic elastomer styrene thermoplastic elastomer
  • olefin resin examples include low density polyethylene, high density polyethylene, linear low density polyethylene, homopolypropylene, random polypropylene, poly ⁇ -olefin, terpolymer (terpolymer) and the like. Although the use is not particularly limited, it is preferable to use homopolypropylene having an excellent balance of water vapor barrier properties, molding processability, rigidity, and the like.
  • the styrene resin used in the mixed resin layer of the thermoplastic resin sheet of the present invention contains polystyrene satisfying a mass average molecular weight in the range of 270000 to 370000. If it is less than 270000, the fluidity will be too high, and the dispersibility / mixability of the olefin resin during mixing will decrease and the notch cracking property will deteriorate, which is not preferable. If it exceeds 370000, the fluidity is excessively lowered and the molding processability is deteriorated. A more preferred range is 280000-350,000.
  • the content ratio of the styrene resin in the entire sheet is preferably 70 to 95% by mass. If the content ratio of the styrene resin exceeds 95% by mass, the water vapor barrier property is deteriorated. If the content ratio of the styrene resin is less than 70% by mass, the notch cracking performance is deteriorated. A more preferable range of the content ratio of the styrenic resin is 75 to 92% by mass.
  • the content ratio of the olefin resin in the entire sheet is preferably 5 to 30% by mass. If the content ratio of the olefin resin is more than 30% by mass, the notch cracking property is deteriorated, and if the content ratio of the olefin resin is less than 5% by mass, the water vapor barrier property is deteriorated. A more preferable range of the content ratio of the olefin resin is 8 to 25% by mass.
  • polystyrene, high impact polystyrene, and a thermoplastic elastomer are the main components, and more preferably 100% by mass of the styrene resin in the mixed resin layer.
  • the content ratio of the styrene-based thermoplastic elastomer is less than 1% by mass, the dispersibility of the olefin-based resin is lowered, leading to deterioration of notch cracking performance. If it exceeds 10% by mass, the sheet becomes too soft, which leads to deterioration of rigidity and notch cracking performance.
  • thermoplastic elastomer used in the thermoplastic resin sheet of the present invention is a hydrogenated styrene / butadiene copolymer or a hydrogenated styrene / isoprene copolymer for the purpose of improving the dispersibility of the olefin resin described above. And at least one selected from the group consisting of hydrogenated products of styrene, butadiene and isoprene copolymers, and styrene-vinylisoprene copolymers.
  • the mixed resin layer in addition to additives such as antioxidants, ultraviolet absorbers, lubricants, etc., resin beads, silica beads, quartz beads, titanium oxide, talc, Fillers such as calcium carbonate and carbon black, pigments and the like can be added.
  • additives such as antioxidants, ultraviolet absorbers, lubricants, etc.
  • the amount of addition is not particularly limited, it is preferably within 10% by mass with respect to 100% by mass of the mixed resin layer.
  • thermoplastic resin sheet of the present invention can be used as a single-layer sheet composed only of the above-mentioned mixed resin layer.
  • a styrene resin layer mainly composed of a styrene resin on both surfaces of the mixed resin layer.
  • the thermoplastic resin sheet according to the second embodiment of the present invention includes a mixed resin layer including a styrene resin and an olefin resin as resin components, and the styrene resin layer including the styrene resin is used as the mixed resin layer.
  • a laminated thermoplastic resin sheet, wherein the styrene resin in the thermoplastic resin sheet is 70 to 95% by mass, the olefin resin is 30 to 5% by mass, and the styrene resin of the mixed resin layer A thermoplastic resin sheet containing polystyrene whose resin has a mass average molecular weight of 270000 to 370000.
  • styrene resin used for the styrene resin layer at least one kind of resin selected from the styrene resins that can be used for the above-mentioned mixed resin layer can be used in the same manner, and the molding processability, sheet Can be used as long as the appearance and notch cracking performance are not impaired. More preferably, it is at least one resin selected from polystyrene, high impact polystyrene, and a copolymer of styrene and butadiene, more preferably at least selected from polystyrene, high impact polystyrene, and a copolymer of styrene and butadiene. It is preferable to use after homogenizing one or more kinds of resins.
  • Styrene resin layers are used in addition to antioxidants, ultraviolet absorbers, lubricants, and other additives, resin beads, silica beads, quartz beads, titanium oxide, talc, as long as practical properties are not impaired, depending on the purpose and application. Fillers such as calcium carbonate and carbon black, pigments and the like can be added. Although the amount of addition is not particularly limited, it is preferably within 10% by mass with respect to 100% by mass of the styrene resin layer.
  • an intermediate layer can be provided between the mixed resin layer and the styrene resin layer for the purpose of improving interlayer adhesion with the mixed resin layer.
  • Both the styrene resin and olefin resin used for the intermediate layer can be used in the same manner as the styrene resin and olefin resin that can be used for the mixed resin layer described above, and the moldability, sheet appearance, strength, Can be used as long as rigidity and notch cracking performance are not impaired.
  • thermoplastic resin sheet according to the third embodiment of the present invention includes a mixed resin layer including a styrene resin and an olefin resin as resin components, and the styrene resin layer including the styrene resin is used as the mixed resin layer.
  • thermoplastic resin sheet comprising an intermediate layer including a styrene resin and an olefin resin interposed between a mixed resin layer and a styrene resin layer, wherein the styrene resin in the thermoplastic resin sheet is A thermoplastic resin sheet containing 70 to 95% by mass, an olefin resin of 30 to 5% by mass, and a styrene resin of the mixed resin layer containing polystyrene having a mass average molecular weight of 270000 to 370000.
  • the content ratio of the olefin resin used in the intermediate layer is preferably 3 to 15% by mass with respect to 100% by mass of the intermediate layer. If it is less than 3% by mass, the interlayer adhesion between the intermediate layer and the mixed resin layer is lowered, and if it exceeds 15% by mass, the interlayer adhesion between the intermediate layer and the styrene resin layer is lowered.
  • the ratio of the thickness of the mixed resin layer, the intermediate layer, and the styrene resin layer depends on the total thickness of the sheet, but is 50 to 90% / 5 It is preferably 25% / 5-25%. If the thickness of the mixed resin layer is less than 50%, water vapor barrier properties and notch cracking properties are not sufficiently obtained. If the thickness exceeds 90%, the intermediate layer and the styrene resin layer become too thin, and the sheet appearance due to melt fracture or the like. This is not preferable because it tends to cause defects.
  • the thickness ratio of the mixed resin layer, the intermediate layer, and the styrene resin layer is more preferably 50 to 86% / 7 to 25% / 7 to 25%, and further preferably 54 to 86% / 7 to 23% / 7. ⁇ 23%.
  • the intermediate layer has resin beads, silica beads, quartz beads, titanium oxide, talc, carbonic acid as long as practical properties are not impaired, depending on the purpose and application.
  • Fillers such as calcium and carbon black, pigments and the like can be added.
  • the amount of addition is not particularly limited, it is preferably within 10% by mass relative to 100% by mass of the intermediate layer.
  • thermoplastic resin sheet The thermoplastic resin sheet of the present invention is produced by a T-die film forming method in which a molten resin is extruded into various sheets using an extruder, an inflation film forming method (tubular method) in which a resin is extruded from an annular die, and a calender. It can be suitably manufactured by various sheet manufacturing methods such as a membrane method. Furthermore, the above-mentioned sheet can be subjected to longitudinal stretching (stretching in the production direction) and transverse stretching (stretching in the direction orthogonal to longitudinal stretching) using a roll speed difference, a tenter stretching machine, etc., as necessary. It is.
  • the preferred thickness of the thermoplastic resin sheet of the present invention is 0.2 mm to 3 mm, more preferably 0.2 mm to 2 mm. If it is less than 0.2 mm, sufficient water vapor barrier properties and rigidity cannot be obtained, and if it exceeds 3 mm, molding processability during container molding such as vacuum molding is deteriorated, which is not preferable.
  • the thermoplastic resin sheet of the present invention preferably does not peel practically, and more preferably has interlaminar adhesion that does not easily peel off even if an intentional peeling operation is attempted.
  • a preferable range of the tensile elastic modulus of the thermoplastic resin sheet of the present invention is 1400 MPa or more and less than 2000 MPa. If it is less than 1400 MPa, the rigidity is excessively reduced, and problems such as the molded container being easily crushed easily occur. When the pressure is 2000 MPa or more, the strength is excessively lowered, and problems such as the molded container being easily damaged are likely to occur.
  • a preferable range of the tensile elongation of the thermoplastic resin sheet of the present invention is 50% or more and less than 150%.
  • a preferable range of the DuPont impact strength of the thermoplastic resin sheet of the present invention is 1.0 J or more. If it is less than 1.0 J, the impact resistance is excessively lowered, and problems such as the molded container being easily damaged are likely to occur.
  • the preferable range of the water vapor transmission rate of the thermoplastic resin sheet of the present invention is less than 6.0 g / m 2 ⁇ day, and more preferably less than 4.0 g / m 2 ⁇ day. If it is 6.0 g / m 2 ⁇ day or more, water vapor permeates excessively, and the moisture content of the component contained in the container using the sheet becomes remarkable, which is not preferable.
  • a preferable range of the sealing strength of the lid material for the thermoplastic resin sheet of the present invention is 3.0N or more and less than 4.0N. If it is less than 3.0 N, it is not preferable because the sealed lid is easily peeled off from the container using the sheet.
  • the notch cracking performance of the thermoplastic resin sheet of the present invention is that the sheet breaks with one folding at the notch portion when the notch is in a solid line and when the notch is in a broken line. Things are preferable.
  • thermoplastic resin sheet of the present invention can be formed into various containers by known thermoforming methods such as vacuum forming, pressure forming, vacuum / pressure forming, press forming, hot plate forming, and the like.
  • the container using the thermoplastic resin sheet of the present invention can be suitably used for various containers such as food containers, beverage containers, pharmaceutical containers, and daily necessities containers.
  • Toyostyrene HRM40 (mass average molecular weight: 360000) [High impact polystyrene] ⁇ Toyostyrene Co., Ltd. “Toyostyrene E640N” ⁇ Toyostyrene Co., Ltd. "Toyostyrene H850N” [Styrenic thermoplastic elastomer] ⁇ “Tuftec P2000 (hydrogenated product of styrene and butadiene copolymer)” manufactured by Asahi Kasei Chemicals Corporation ⁇ "TR2000 (copolymer of styrene and butadiene)” manufactured by JSR Corporation ⁇ Kuraray Co., Ltd.
  • thermoplastic resin sheet having a mixed resin layer was obtained using a coat hanger type T die (width 550 mm) by a feed block method using a ⁇ 65 mm single screw extruder.
  • Example 2 (Configuration of Second Embodiment)> Using a 65 mm single screw extruder and 40 mm single screw extruder, and using a coat block hanger type T die (width 550 mm) by a feed block method, and having a layer structure of styrene resin layer / mixed resin layer / styrene resin layer A thermoplastic resin sheet was obtained.
  • thermoplastic resin sheet having a layer structure of a styrene resin layer was obtained.
  • Tables 1 and 2 summarize the characteristics such as the raw material blending ratio, layer ratio, and thickness of each layer of the thermoplastic resin sheet.
  • the mixed resin layer is a mixture of H850N or E640N, HRM23, HRM18 or HRM40, # 7350, P2000 or S2104 and F107DJ in a pellet state
  • the intermediate layer is H850N or E640N, HRM23, HRM18 or G200C, # 7350, P2000 or S2104, and F107DJ were sufficiently mixed in a pellet state
  • HRM18 or G200C and H850N or E640N and 730L were used for the styrene resin layer.
  • thermoplastic resin sheet was prepared with reference to the production method of the example.
  • Table 3 and Table 4 summarize structural characteristics such as the raw material blending ratio, layer ratio, and thickness of each layer in each sheet.
  • DuPont impact strength The DuPont impact strength was measured according to ASTM D2794, using a DuPont impact machine manufactured by Toyo Seiki Co., Ltd., using a hitting core having a tip radius of 7.9 mm.
  • the water vapor transmission rate was measured under the conditions of a temperature of 40 ° C. and a humidity of 90% in accordance with JIS K7129 using an L80-5000 type water vapor permeability meter manufactured by System Instruments. The measured values were judged as superior or inferior according to the following criteria.
  • Water vapor permeability is less than 4.0 [g / m 2 ⁇ day].
  • Good: Water vapor transmission rate is 4.0 [g / m 2 ⁇ day] or more and less than 6.0 [g / m 2 ⁇ day].
  • Poor: Water vapor transmission rate is 6.0 [g / m 2 ⁇ day] or more.
  • the sample piece breaks at the notch by the first folding.
  • Defect The sample piece does not break at the notch portion after the first bending.
  • thermoplastic resin sheet of the present invention while having excellent strength and rigidity, good water vapor barrier properties, sealing properties with lid materials, interlayer adhesion properties, various Notch cracking performance that can also be applied to the notch type can be realized, and it can be suitably used for various containers that require water vapor barrier properties such as portion containers.
  • thermoplastic resin sheet of the present invention can be used for various packaging materials such as food containers, beverage containers, industrial containers (including various trays), and in particular, water vapor barrier properties such as oil-based snack foods and dairy products. It can be suitably used for food containers that require notch cracking properties.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

La présente invention concerne : une feuille de résine thermoplastique qui garde de bonnes propriétés d'aptitude au moulage, de résistance pratique et de résistance de scellement à un matériau de couvercle, présente une bonne propriété de barrière à la vapeur d'eau et une excellente performance de fendillement de craquelures qui est applicable à diverses formes de craquelures, et présente une excellente propriété d'adhérence intercouche ; et un récipient produit à partir de la feuille de résine thermoplastique. La feuille de résine thermoplastique contient une couche de résine mixte contenant une résine de styrène et une résine d'oléfine comme constituants de résine, les teneurs en résine de styrène et en résine d'oléfine dans la feuille de résine thermoplastique étant compris entre 70 et 95 % en masse et entre 30 et 5 % en masse, respectivement, et la résine de styrène dans la couche de résine mixte contenant du polystyrène ayant une masse moléculaire moyenne en masse comprise entre 270 000 et 370 000.
PCT/JP2014/065538 2013-07-25 2014-06-12 Feuille de résine thermoplastique, et récipient produit à partir de celle-ci Ceased WO2015012012A1 (fr)

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JP2015528190A JP6460989B2 (ja) 2013-07-25 2014-06-12 熱可塑性樹脂シートおよびその容器
CN201480042118.9A CN105658723B (zh) 2013-07-25 2014-06-12 热塑性树脂片材及其容器

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JP2023005122A (ja) * 2021-06-28 2023-01-18 株式会社イノベックス ポーション容器
JPWO2023249089A1 (fr) * 2022-06-24 2023-12-28

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TWI736536B (zh) * 2016-06-21 2021-08-21 日商電化股份有限公司 多層樹脂薄膜以及成型容器
CN114193879B (zh) * 2021-11-24 2023-07-07 成都众恒印务有限责任公司 一种高阻隔镀铝复合膜及其制备方法

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JP2023005122A (ja) * 2021-06-28 2023-01-18 株式会社イノベックス ポーション容器
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TW201509665A (zh) 2015-03-16
JP6460989B2 (ja) 2019-01-30
JPWO2015012012A1 (ja) 2017-03-02
CN105658723B (zh) 2018-01-16
CN105658723A (zh) 2016-06-08

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