WO2016163361A1 - Feuille de résine thermoplastique multicouche et récipient la comprenant - Google Patents

Feuille de résine thermoplastique multicouche et récipient la comprenant Download PDF

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Publication number
WO2016163361A1
WO2016163361A1 PCT/JP2016/061137 JP2016061137W WO2016163361A1 WO 2016163361 A1 WO2016163361 A1 WO 2016163361A1 JP 2016061137 W JP2016061137 W JP 2016061137W WO 2016163361 A1 WO2016163361 A1 WO 2016163361A1
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Prior art keywords
density polyethylene
resin layer
ethylene
resin sheet
resin
Prior art date
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PCT/JP2016/061137
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English (en)
Japanese (ja)
Inventor
喬梓 村岡
中里　利勝
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デンカ株式会社
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Priority to CN201680018715.7A priority Critical patent/CN107428145B/zh
Priority to JP2017510991A priority patent/JP6616825B2/ja
Publication of WO2016163361A1 publication Critical patent/WO2016163361A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/14—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents
    • B65D1/26—Thin-walled containers, e.g. formed by deep-drawing operations
    • B65D1/28—Thin-walled containers, e.g. formed by deep-drawing operations formed of laminated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants

Definitions

  • the present invention relates to a thermoplastic multilayer resin sheet and a container using the same.
  • thermoplastic resin sheets for forming packaging containers for soft drinks, fruit juice drinks, taste drink foods, etc. styrene resins having excellent thermoformability and rigidity have been used.
  • An olefin-based resin layer such as high-density polyethylene or polypropylene is provided on the resin-based resin layer through an adhesive layer such as a modified olefin-based resin to provide water vapor barrier properties and suppress deterioration in quality due to moisture evaporation or moisture absorption of the contents.
  • thermoplastic multilayer resin sheets are widely used (for example, Patent Documents 1 to 3).
  • thermoplastic multilayer sheet using the olefin resin as the water vapor barrier resin layer as described above is used for FFS packaging, in the packaging container punching process, the container punched portion is thin. There was a problem that the resinity must remain in the form of filaments and the merchantability was impaired.
  • Patent Document 1 JP-A-11-138705
  • Patent Document 2 JP-A-2003-231515
  • Patent Document 3 JP-A-9-290492
  • the present invention has been made in view of the above circumstances, and even when it is subjected to FFS packaging, it is possible to prevent the occurrence of resin whiskers at the time of punching, a thermoplastic multilayer resin sheet having good punchability, And a molded container comprising the same.
  • the present inventors have included low-density polyethylene and high-density polyethylene having a density in a specific range, and on both sides of an ethylene-based resin layer having a total density in a specific range.
  • a thermoplastic multilayer resin sheet capable of preventing the generation of resin whisker during stamping by laminating a styrene resin layer via a modified olefin polymer layer, even when used for FFS packaging was obtained, and the present invention was achieved.
  • the present invention has a density of 0.915 ⁇ 0.930g / cm 3 of a low density polyethylene 10 to 90 wt%, a high density polyethylene having a density of 0.945 ⁇ 0.965g / cm 3 90 ⁇ 10 wt%
  • a thermoplastic multilayer resin sheet comprising a styrene resin layer laminated on both sides of an ethylene resin layer containing a total density of 0.927 to 0.955 g / cm 3 via a modified olefin polymer layer I will provide a.
  • the thermoplastic multilayer resin sheet according to the present invention can form a notch from one surface side, and the total thickness of the modified olefin polymer layer and the styrene resin layer on the one surface side is 40. It is preferable that the thickness is ⁇ 350 ⁇ m. Furthermore, the thickness of the ethylene resin layer is preferably 20 to 200 ⁇ m, and the styrene resin layer is preferably made of a styrene resin containing 3 to 9% by mass of a butadiene rubber component.
  • the present invention also provides a container obtained by thermoforming the thermoplastic multilayer resin sheet according to the present invention.
  • the thermoplastic multilayer sheet according to one embodiment of the present invention has a density of 0.915 ⁇ 0.930g / cm 3 of a low density polyethylene 10 to 90 wt%, a density of 0.945 ⁇ 0.965g / cm 3
  • a styrene resin layer is formed on both sides of an ethylene resin layer containing 90 to 10% by mass of high density polyethylene and having an overall density of 0.927 to 0.955 g / cm 3 via a modified olefin polymer layer. It is a laminated thermoplastic multilayer sheet.
  • the ethylene-based resin layer is an important layer for imparting water vapor barrier properties to the sheet, and 10 to 90% by mass of low density polyethylene having a density of 0.915 to 0.930 g / cm 3 and a density of 0.945. It contains 90 to 10% by mass of high density polyethylene of ⁇ 0.965 g / cm 3 , and the overall density is 0.927 to 0.955 g / cm 3 . More preferably, 70 to 30% by mass of low density polyethylene having a density of 0.920 to 0.925 g / cm 3 and 30 to 70% by mass of high density polyethylene having a density of 0.950 to 0.960 g / cm 3 are contained.
  • the overall density is 0.935 to 0.945 g / cm 3 .
  • adjusting low density polyethylene having a density of 0.915 ⁇ 0.930g / cm 3, and density of the content of high density polyethylene 0.945 ⁇ 0.965g / cm 3 within the By doing, the density of the whole ethylene-type resin layer can be made into the said range. If the density of the entire ethylene-based resin layer exceeds 0.955 g / cm 3 , resin whiskers may occur when the container is punched, and the appearance of the container may be deteriorated. If the density is less than 0.927 g / cm 3 , sufficient There is a possibility that the water vapor barrier property cannot be obtained.
  • the low-density polyethylene used in the present invention includes linear low-density polyethylene polymerized with a Ziegler type catalyst or a metallocene catalyst as long as the density is in the above range.
  • the impact strength may be reduced and the buckling strength may be reduced during container molding, and if it is less than 0.945 g / cm 3 , sufficient water vapor barrier properties May not be obtained.
  • the ethylene-based resin layer includes a high-density polyethylene having a density outside the range of 0.945 to 0.965 g / cm 3 within a range not impairing the effects of the present invention; a density of 0.915 to 0.930 g / cm 3
  • Low density polyethylene linear low density polyethylene; linear medium density polyethylene; ethylene- ⁇ -olefin copolymer polymerized using metallocene catalyst; polypropylene; ethylene-vinyl acetate copolymer; ionomer resin
  • colorants such as pigments and dyes, release agents such as silicone oil and alkyl ester, fibrous reinforcing agents such as glass fibers, granular lubricants such as talc, clay and silica, sulfonic acids and alkali metals, etc.
  • Additives such as antistatic agents such as salt compounds and polyalkylene glycols, ultraviolet absorbers and antibacterial agents can be added.
  • the thermoplastic multilayer resin sheet of this embodiment and the scrap resin generated in the manufacturing process of the molded container can be mixed and used.
  • the thickness of the ethylene-based resin layer is preferably 20 to 200 ⁇ m, more preferably 30 to 100 ⁇ m. By setting the thickness to 20 ⁇ m or more, sufficient water vapor barrier properties can be obtained, and by setting the thickness to 200 ⁇ m or less, it is possible to suppress a decrease in moldability caused by warpage during container molding.
  • styrenic resin layer examples include styrene monomers such as styrene, ⁇ -methylstyrene, p-methylstyrene, dimethylstyrene, pt-butylstyrene, chlorostyrene, or a copolymer thereof; Copolymers of styrenic monomers and other monomers, such as styrene-acrylonitrile copolymers (AS resin); the styrenic monomers and other polymers such as polybutadiene, styrene-butadiene copolymers, polyisoprene And graft polymers obtained by graft polymerization in the presence of a diene rubber polymer such as polychloroprene, such as high impact polystyrene (HIPS resin), styrene-acrylonitrile graft polymer (HIPS resin), styrene-acrylonitrile graft polymer (
  • the styrene resin can contain 3 to 9% by mass and 4 to 8% by mass of a butadiene rubber component.
  • the butadiene rubber component content is a simple method of adjusting by blending GPPS and HIPS, but it may be adjusted at the manufacturing stage of HIPS. By setting the butadiene rubber component to 3 to 9% by mass, a practically sufficient container strength can be obtained, and occurrence of problems such as adhesion of a hot platen at the time of thermoforming can be suppressed.
  • a colorant such as a pigment or a dye, a release agent such as silicon oil or an alkyl ester, or a fibrous reinforcing agent such as glass fiber, as long as the effects of the present invention are not impaired.
  • Additives such as particulate lubricants such as talc, clay and silica, salt compounds of sulfonic acid and alkali metals, antistatic agents such as polyalkylene glycol, UV absorbers and antibacterial agents can be added.
  • the scrap resin generated in the manufacturing process of the multilayer resin sheet and the molded container of the present embodiment can be mixed and used.
  • the thickness of the styrene-based resin layer on the side where the notch is formed is preferably 30 to 350 ⁇ m, more preferably 100 to 200 ⁇ m.
  • the thickness is preferably 30 to 350 ⁇ m, more preferably 100 to 200 ⁇ m.
  • the thickness of the styrene-based resin layer on the surface side where no notch is formed can be 300 to 950 ⁇ m and 400 to 850 ⁇ m. By setting it as 300 micrometers or more, it can prevent that the rigidity of the container obtained by thermoforming becomes inadequate. By setting it as 950 micrometers or less, it can prevent that the notch folding property after forming a notch falls.
  • modified olefin polymer layer examples include homopolymers of olefins having about 2 to 8 carbon atoms such as ethylene, propylene, and butene-1, and these olefins and ethylene, propylene, and butene-1.
  • olefins having about 2 to 20 carbon atoms such as 3-methylbutene-1, pentene-1, 4-methylpentene-1, hexene-1, octene-1, decene-1, etc., vinyl acetate, vinyl chloride, acrylic acid Olefin resins such as copolymers with vinyl compounds such as methacrylic acid, acrylic esters, methacrylic esters, styrene, ethylene-propylene copolymers, ethylene-propylene-diene copolymers, ethylene-butene-1 Olefin rubbers such as copolymers, propylene-butene-1 copolymers, acrylic acid, methacrylic acid, Unsaturated carboxylic acids such as rotonic acid, isocrotonic acid, maleic acid, fumaric acid, itaconic acid, citraconic acid and tetrahydrophthalic acid, or derivatives thereof such as acid halides, amides, imides, anhydrides and esters
  • an ethylene resin, a propylene resin, or an ethylene-propylene or butene-1 copolymer rubber modified with an unsaturated dicarboxylic acid or an anhydride thereof, particularly maleic acid or an anhydride thereof is preferable.
  • the thickness of the modified olefin polymer layer is preferably 10 to 50 ⁇ m, more preferably 15 to 30 ⁇ m on either side.
  • the thickness is preferably 10 to 50 ⁇ m, more preferably 15 to 30 ⁇ m on either side.
  • the layer structure of the thermoplastic multilayer resin sheet of one embodiment according to the present invention basically consists of a styrene resin layer / modified olefin polymer layer / ethylene resin layer / modified olefin polymer layer / styrene resin layer.
  • a multilayer resin sheet according to an embodiment of the present invention a scrap resin layer generated in the manufacturing process of the molded container, or the like may be laminated on the opposite side where the notch is formed.
  • the total thickness of the modified olefin polymer layer and the styrene resin layer on the surface side where the notch is formed is preferably 40 to 370 ⁇ m, more The thickness is preferably 120 to 240 ⁇ m.
  • the thickness of the styrenic resin layer on the surface side where the notch is relatively formed becomes thin, so that the styrenic resin layer is cut when stretched through thermoforming, and the appearance and strength of the container, etc. Can be prevented from being damaged.
  • the necessity for enlarging the insertion depth of the blade at the time of forming a notch reduces by setting it as 350 micrometers or less, and can suppress the holding
  • the total thickness of the thermoplastic multilayer resin sheet is preferably 500 to 1500 ⁇ m, more preferably 800 to 1400 ⁇ m.
  • the container obtained by thermoforming can have sufficient strength.
  • it can prevent that the manufacturing cost of a container becomes high.
  • the molding method of the thermoplastic multilayer resin sheet according to one embodiment of the present invention is not particularly limited, and a general method can be used.
  • a raw material resin in each layer is melt-extruded using three or more single-screw extruders to obtain a multilayer resin sheet using a feed block and a T die, or a multilayer resin sheet is obtained using a multi-manifold die.
  • a method is mentioned.
  • the molded container according to one embodiment of the present invention is obtained by thermoforming the thermoplastic multilayer resin sheet according to one embodiment of the present invention.
  • the thermoforming method includes general vacuum forming, pressure forming, and the plug assist method in which a plug is brought into contact with one side of the sheet as a form of application, and a pair of male and female dies are brought into contact with both sides of the sheet.
  • a method called so-called “match mold molding” and the like, in which the molding is performed, is exemplified, but is not limited thereto.
  • a known sheet heating method such as radiation heating with an infrared heater or the like which is non-contact heating can be applied.
  • Ethylene-based resin layer high-density polyethylene “Hi-Zex 3800F” (manufactured by Prime Polymer Co., Ltd., density: 0.958 g / cm 3 )
  • High density polyethylene “Hi-Zex 2208J” (manufactured by Prime Polymer Co., Ltd., density: 0.964 g / cm 3 )
  • High density polyethylene “Hi-Zex 8000F” (manufactured by Prime Polymer, density 0.948 g / cm 3 )
  • High density polyethylene “Hi-Zex 5100B” (manufactured by Prime Polymer Co., Ltd., density 0.944 g / cm 3 )
  • High-density polyethylene “Suntech J240” (Asahi Kasei Chemicals Corporation, density 0.966 g / cm 3 )
  • Low density polyethylene “Sumikasen F200” (manufactured by Sumi
  • Example 1 Three 40 mm single screw extruders were used, and by a feed block method, styrene resin layer A 140 ⁇ m / modified olefin resin layer A 15 ⁇ m / ethylene resin layer 100 ⁇ m / modified olefin polymer layer B 15 ⁇ m / styrene resin layer B 830 ⁇ m A multilayer resin sheet having a layer configuration of 1100 ⁇ m in thickness (total thickness of styrene resin layer A and modified olefin polymer layer A 155 ⁇ m) was obtained.
  • styrene resin what mixed HIPS resin and GPPS resin by the compounding ratio 70/30 (HIPS / GPPS) was used (butadiene rubber component content: 6.3 mass%), and as ethylene-type resin, A mixture of low-density polyethylene “Sumikasen F200” and high-density polyethylene “Hi-Zex 3800F” at a blending ratio of 35/65 (low-density polyethylene / high-density polyethylene) was used.
  • Example 2 A multilayer resin sheet was formed in the same manner as in Example 1 except that the low density polyethylene and high density polyethylene of the ethylene resin layer were changed to a blending ratio of 65/35 (low density polyethylene / high density polyethylene).
  • Example 3 A multilayer resin sheet was formed in the same manner as in Example 1 except that the low density polyethylene and high density polyethylene of the ethylene resin layer were changed to a blending ratio of 85/15 (low density polyethylene / high density polyethylene).
  • Example 4 A multilayer resin sheet was formed in the same manner as in Example 1 except that the low density polyethylene and high density polyethylene of the ethylene resin layer were changed to a blending ratio of 15/85 (low density polyethylene / high density polyethylene).
  • Example 5 The low density polyethylene and high density polyethylene of the ethylene resin layer were changed to a blending ratio 50/50 (low density polyethylene / high density polyethylene), and the thicknesses of the styrene resin layers A and B were changed as shown in Table 1. Except for the above, a multilayer resin sheet was formed in the same manner as in Example 1.
  • Example 6 The low density polyethylene and high density polyethylene of the ethylene resin layer were changed to a blending ratio 50/50 (low density polyethylene / high density polyethylene), and the thicknesses of the styrene resin layers A and B were changed as shown in Table 1. Except for the above, a multilayer resin sheet was formed in the same manner as in Example 1.
  • Example 7 The low density polyethylene and high density polyethylene of the ethylene resin layer were changed to a blending ratio of 85/15 (low density polyethylene / high density polyethylene), and the thicknesses of the ethylene resin layer and the styrene resin layer B are as shown in Table 1.
  • a multilayer resin sheet was formed in the same manner as in Example 1 except that the film was changed to.
  • Example 8 The low density polyethylene and high density polyethylene of the ethylene resin layer were changed to a blending ratio of 15/85 (low density polyethylene / high density polyethylene), and the thicknesses of the ethylene resin layer and the styrene resin layer B are as shown in Table 2.
  • a multilayer resin sheet was formed in the same manner as in Example 1 except that the film was changed to.
  • Example 9 A multilayer resin sheet was formed in the same manner as in Example 1 except that the styrene resin layer HIPS and GPPS were changed to a blending ratio of 40/60 (HIPS / GPPS).
  • Example 10 A multilayer resin sheet was formed in the same manner as in Example 1 except that the styrene resin layer HIPS and GPPS were changed to a blending ratio of 100/0 (HIPS / GPPS).
  • Example 11 to 14 A multilayer resin sheet was produced in the same manner as in Example 1 except that the low-density polyethylene varieties of the ethylene resin layer, the high-density polyethylene varieties, and the blending ratio of the low-density polyethylene and high-density polyethylene were changed as shown in Table 2. Was formed.
  • Example 1 A multilayer resin sheet was formed in the same manner as in Example 1, except that the low density polyethylene and high density polyethylene of the ethylene resin layer were changed to a blending ratio of 0/100 (low density polyethylene / high density polyethylene).
  • Example 2 A multilayer resin sheet was formed in the same manner as in Example 1 except that the low density polyethylene and high density polyethylene of the ethylene resin layer were changed to a blending ratio of 100/0 (low density polyethylene / high density polyethylene).
  • Example 4 A multilayer resin sheet was produced in the same manner as in Example 1 except that the low density polyethylene varieties of the ethylene resin layer, the high density polyethylene varieties, and the blending ratio of the low density polyethylene and the high density polyethylene were changed as shown in Table 3. Was formed.
  • butadiene rubber content in the styrene resin layer The used HIPS was dissolved in chloroform, and iodine monochloride was added to react with the double bond in polybutadiene. Potassium iodide was added to the remaining iodine monochloride to convert it to iodine, and this was subjected to reverse adjustment with sodium thiosulfate to determine the butadiene rubber content in HIPS. The butadiene rubber content in the styrene resin layer was calculated from the blending ratio of HIPS and GPPS.
  • thermoplastic multilayer resin sheet was cut out, and 20 mm square pieces were cut out from the right and left ends and the center in the direction perpendicular to the production direction. After smoothing the end face, the thickness of each of the three sections of the ethylene-based resin layer, the modified olefin-based polymer layer, and the styrene-based resin layer was measured with a Keyence microscope “VK-X100”.
  • thermoplastic multilayer resin sheet was cut out and measured in thickness three times in total, and the arithmetic average value of the thicknesses of the nine ethylene resin layers, the modified olefin polymer layer and the styrene resin layer was determined as the ethylene resin layer, The thicknesses of the modified olefin polymer layer and the styrene resin layer were used.
  • the buckling strength of the molded container obtained in the same manner as described above was measured in an environment of 23 ° C. and 50% relative humidity.
  • the buckling strength was the maximum point load when compression measurement was performed according to JIS-K7181.
  • the measurement equipment, compression conditions, and criteria for buckling strength are described below.
  • Good Buckling strength is 70 N or more.
  • Good Buckling strength is 60N or more and less than 70N.
  • Defect Buckling strength is less than 60N.
  • thermoplastic multilayer resin sheets of Examples 1 to 14 it has thermoformability, rigidity, water vapor barrier property, notch foldability, and resin mustache at the time of punching.
  • thermoplastic multilayer resin sheet of the present invention is suitable as a container for yogurt, jelly, pudding, etc. because it has thermoformability, rigidity, water vapor barrier property, notch crease and can prevent the occurrence of resin whiskers during punching. In addition to the above, it can be used for various applications such as various food containers, beverage containers, pharmaceutical containers, daily necessities containers and the like.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Ceramic Engineering (AREA)
  • Laminated Bodies (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Wrappers (AREA)

Abstract

Le problème de l'invention consiste à fournir une feuille de résine thermoplastique multicouche ayant une aptitude au découpage satisfaisante et qui, même lorsqu'elle est soumise à un emballage FFS, peut éviter de manière suffisante la formation de chaînes de résine lors du découpage. La solution proposée par l'invention est une feuille de résine thermoplastique multicouche comprenant : une couche de résine à base d'éthylène qui comprend 10 à 90 % en masse de polyéthylène basse densité ayant une densité de 0,915 à 0,930 g/cm3 et 90-10 % en masse de polyéthylène haute densité ayant une densité de 0,945-0,965 g/cm3, et qui, dans son ensemble, a une densité de 0,927 à 0,955 g/cm3 ; et une couche de résine à base de styrène superposée sur chacune des deux surfaces de la couche de résine à base d'éthylène, avec une couche de polymère à base d'oléfine modifiée intercalée entre celles-ci.
PCT/JP2016/061137 2015-04-08 2016-04-05 Feuille de résine thermoplastique multicouche et récipient la comprenant WO2016163361A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201680018715.7A CN107428145B (zh) 2015-04-08 2016-04-05 热塑性多层树脂片材及使用该热塑性多层树脂片材的容器
JP2017510991A JP6616825B2 (ja) 2015-04-08 2016-04-05 熱可塑性多層樹脂シート及びこれを用いた容器

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JP2015079132 2015-04-08
JP2015-079132 2015-04-08

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