WO2020022106A1 - 多層フィルム及び包装体 - Google Patents

多層フィルム及び包装体 Download PDF

Info

Publication number
WO2020022106A1
WO2020022106A1 PCT/JP2019/027680 JP2019027680W WO2020022106A1 WO 2020022106 A1 WO2020022106 A1 WO 2020022106A1 JP 2019027680 W JP2019027680 W JP 2019027680W WO 2020022106 A1 WO2020022106 A1 WO 2020022106A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
multilayer film
density polyethylene
sealant layer
resin
Prior art date
Application number
PCT/JP2019/027680
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
藤原　達也
研太 佐々木
智大 中田
惇 松本
俊介 越智
Original Assignee
住友ベークライト株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 住友ベークライト株式会社 filed Critical 住友ベークライト株式会社
Priority to JP2019565969A priority Critical patent/JP6659002B1/ja
Priority to CN201980040615.8A priority patent/CN112313077A/zh
Publication of WO2020022106A1 publication Critical patent/WO2020022106A1/ja

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—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
    • 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

Definitions

  • the present invention relates to a multilayer film and a package.
  • This application discloses Japanese Patent Application No. 2018-137395 filed in Japan on July 23, 2018, Japanese Patent Application No. 2019-40869 filed in Japan on March 6, 2019, and July 2, 2019. Priority is claimed based on Japanese Patent Application No. 2019-123818 filed in Japan, the contents of which are incorporated herein by reference.
  • deep-drawn packages (hereinafter also referred to as “deep-drawn packages”) have been used as medical packages.
  • the deep-drawing package has a bottom material composed of a multilayer film having a concave portion formed in the center and a lid material composed of a nonwoven fabric made of polyethylene or sterilized paper (hereinafter, also referred to as a “nonwoven fabric made of PE”).
  • a nonwoven fabric made of PE a nonwoven fabric made of PE”.
  • a bottom material used for a medical package a multilayer film in which a polyester film or a nylon film and a heat-sealable resin film are laminated (lamination method) is widely and generally used.
  • a nonwoven fabric made of polyethylene or sterilized paper is used as described above from the viewpoint of air permeability of a sterilizing gas in a sterilizing process.
  • the medical packaging is required to be easily openable depending on the mode of use.
  • a polyethylene nonwoven fabric is selected from the viewpoint that hygiene is emphasized. Since the polyethylene nonwoven fabric coated with an adhesive and imparted easy-opening properties is expensive and the gas permeability is reduced, the easy peeling function is provided to the side of the multilayer film sealed with the polyethylene nonwoven fabric.
  • An easily peelable resin layer hereinafter, also referred to as an “easy peel layer” is provided on a sealing side with a nonwoven fabric made of PE or the like as a multilayer film used as a bottom material in order to impart easy-opening properties to a medical package. Is known (Patent Document 1).
  • Patent Document 2 Also known is a co-extruded multilayer film for deep drawing, comprising a polyamide resin, a nonwoven fabric or sterilized paper made of polyethylene at 135 ° C. or less and a seal layer capable of heat sealing with a seal layer, and an easy peel layer having delamination property with the seal layer.
  • a multilayer film as a bottom material used for a medical package requires a proper sealing strength when heat-sealing with sterilized paper as a lid material. If a part of the sterilized paper remains on the medical device, the so-called paper residue occurs, paper fibers may adhere to the medical instruments etc. stored in the medical package and enter the body, Hygiene problems such as lowering occur.
  • the present invention has been made in view of the above circumstances, and when heat-sealed with sterilized paper, while ensuring an appropriate sealing strength, a multilayer film that can be used as a bottom material that does not generate paper residue on the peeled surface, and It is an object to provide a package.
  • the present invention employs the following configurations.
  • the sealant layer further contains low-density polyethylene, and a mass ratio of the linear low-density polyethylene to the low-density polyethylene is in a range of 50:50 to 99: 1.
  • the molecular weight distribution (Mw / Mn) of the linear low density polyethylene contained in the sealant layer is 7.0 or less, and the number average molecular weight Mn of the linear low density polyethylene is 20,000 or more.
  • the multilayer film according to any one of [1] to [7] which can be heat-sealed with sterilized paper in a temperature range of 135 to 155 ° C.
  • the package according to [9], wherein a seal strength between the multilayer film and the sterilized paper is 1.0 to 7.7 (N / 15 mm).
  • the multilayer film of the present invention includes at least a sealant layer provided to be a surface layer, wherein the sealant layer contains at least linear low-density polyethylene, and Since the density of the low-density polyethylene is 0.93 or more, the package in which the multilayer film and the sterilized paper are heat-sealed, when the sterilized paper is peeled off while ensuring appropriate sealing strength, the bottom material is peeled off.
  • This has an excellent effect that it is possible to suppress the occurrence of so-called paper residue, which is a part of the sterilized paper remaining on the surface, and to provide a package having no hygiene problems.
  • BRIEF DESCRIPTION OF THE DRAWINGS It is a cross-sectional schematic diagram of the multilayer film 1 which is one Embodiment to which this invention is applied.
  • BRIEF DESCRIPTION OF THE DRAWINGS It is a cross-sectional schematic diagram of the multilayer film 1 which is one Embodiment to which this invention is applied.
  • FIG. 1 is a schematic cross-sectional view of a multilayer film 1 according to an embodiment to which the present invention is applied.
  • a multilayer film 1 of the present embodiment has a schematic configuration including a sealant layer 2 provided as a surface layer, and a base material layer 3 provided adjacent to the sealant layer 2.
  • the multilayer film 1 of the present embodiment includes a sealant layer 2 provided as a surface layer, a base layer 3 provided adjacent to the sealant layer 2, and a base layer 3. It may be schematically configured to include another resin layer laminated thereon.
  • the multilayer film 1 of the present embodiment can be used as a film for a package, particularly for a bottom material of a medical package.
  • the sealant layer 2 is a resin layer provided to be joined to sterilized paper to be joined by heat sealing and to provide easy-openability.
  • the sealant layer 2 contains at least linear low-density polyethylene, and the linear low-density polyethylene has a density of 0.93 or more, preferably 0.93 or more and 0.98 or less, more preferably 0.93 or more. 0.95 or less.
  • the resin that can be used for the sealant layer 2 is not particularly limited as long as it is a resin containing linear low-density polyethylene (LLDPE) having the above density, but includes a metallocene-catalyzed linear low-density polyethylene (mLLDPE). Resins are preferred.
  • LLDPE linear low-density polyethylene
  • mLLDPE metallocene-catalyzed linear low-density polyethylene
  • Resins are preferred.
  • the linear low-density polyethylene (LLDPE) having the above density a resin having a low detection amount of a low-molecular-weight volatile component by GC-MS is preferable. If the low-molecular-weight volatile component is small, no gas is generated during molding, and equipment contamination can be prevented.
  • the detection amount of the low molecular weight volatile component is preferably 0.1 wt% or less, and more preferably 0.05 wt% or less.
  • the linear low-density polyethylene (LLDPE) having the above density is preferably a resin having a low molecular weight component content in the molecular weight distribution (Mw / Mn) by GPC.
  • Mw / Mn molecular weight distribution
  • the molecular weight distribution (Mw / Mn) by GPC is preferably 7.0 or less, more preferably 4.5 or less.
  • the number average molecular weight Mn is preferably 20,000 or more, more preferably 23,000 or more.
  • the linear low-density polyethylene (LLDPE) may have one melting point peak or two or more melting point peaks measured by DSC, and the highest melting point peak temperature is 120 ° C. or higher. preferable. More preferably, a resin having the highest melting point peak temperature of 120 ° C. or higher and the lowest melting point peak not present at 100 ° C. or lower is preferable. More preferably, a resin having a highest melting point peak temperature of 120 ° C. or higher and a lowest melting point peak not present at 110 ° C. or lower is preferable. According to the above, the resin is not melted by heating at the time of molding, and equipment contamination can be prevented.
  • the sealant layer 2 may further contain low-density polyethylene.
  • the mass ratio of the linear low-density polyethylene to the low-density polyethylene in the resin constituting the sealant layer 2 is preferably in the range of 50:50 to 99: 1, The range is more preferably from 60:40 to 99: 1, and even more preferably from 80:20 to 99: 1.
  • the content of the linear low-density polyethylene in the entire resin constituting the sealant layer 2 is preferably 30 to 100% by mass, and more preferably 50 to 100% by mass.
  • the sealant layer 2 further contains low-density polyethylene
  • the total content of linear low-density polyethylene and low-density polyethylene is preferably 30 to 100% by mass, and 50 to 100% by mass. Is more preferred.
  • the content of the linear low-density polyethylene is within the above preferred range, the heat seal strength is more stable, and when the sterilized paper is peeled off, paper residue on the sealant layer 2 is further suppressed.
  • the sealant layer 2 may contain an additive from the viewpoint of improving the low-temperature heat sealability.
  • the additive include a terpene resin (for example, “Hirodine series” manufactured by Yashara Chemical Co., Ltd.).
  • the thickness of the sealant layer 2 is preferably from 3 to 70 ⁇ m, more preferably from 5 to 45 ⁇ m.
  • the thickness is at least the lower limit of the preferred range, a higher seal strength is obtained when heat-sealing with sterilized paper, and when the thickness is at most the lower limit, the effect of easy-opening property is higher when opening. .
  • the base material layer (also referred to as a core layer) 3 is a resin layer provided to be adjacent to the above-described sealant layer 2 for the purpose of imparting flexibility to the multilayer film 1.
  • the resin that can be used for the base material layer 3 is not particularly limited as long as it is a resin that can impart the above function, and examples thereof include a polyethylene-based resin.
  • polyethylene-based resin examples include ethylene homopolymers such as low-density polyethylene (LDPE) resin, linear low-density polyethylene (LLDPE) resin, medium-density polyethylene (MDPE) resin, and high-density polyethylene (HDPE) resin; Ethylene-vinyl acetate copolymer (EVA) resin, ethylene-methyl methacrylate copolymer (EMMA) resin, ethylene-ethyl acrylate copolymer (EEA) resin, ethylene-methyl acrylate copolymer (EMA) resin, ethylene- Ethylene copolymers such as ethyl acrylate-maleic anhydride copolymer (E-EA-MAH) resin, ethylene-acrylic acid copolymer (EAA) resin, ethylene-methacrylic acid copolymer (EMAA) resin; ionomers (ION) ) Resin, etc., alone or two or more types The combined used in.
  • EVA Eth
  • the above-mentioned LLDPE is preferable.
  • LLDPE As the polyethylene resin, the above-mentioned LLDPE is preferable.
  • LLDPE As the resin contained in the base material layer 3, more stable heat seal strength (a synergistic effect with the resin containing linear low-density polyethylene used in the sealant layer 2) can be obtained.
  • the base material layer 3 may be only one layer or, as shown in FIG. 2, may be two or more layers. For example, by forming the base layer 3 from a plurality of layers made of different materials, characteristics such as hardness of the base layer 3 can be adjusted. Examples of the two or more base material layers include a base material layer having two layers of LDPE and LLDPE.
  • the thickness of the base material layer 3 is preferably from 15 to 150 ⁇ m, more preferably from 30 to 100 ⁇ m. When the thickness is not less than the lower limit of the preferred range, the flexibility of the multilayer film 1 is improved, and when it is not more than the upper limit, more stable sealing strength can be obtained.
  • the thickness ratio between the sealant layer 2 and the base material layer 3 is preferably in the range of 1: 0.5 to 1:15, and is preferably in the range of 1: 0.5 to 1:15. It is more preferably in the range of 1:10, more preferably in the range of 1: 2 to 1:10.
  • the above-mentioned ratio is at least the lower limit of the preferable range, an effect of preventing curling of the package is obtained, and when it is at most the upper limit, more stable sealing strength is obtained.
  • the multilayer film 1 of the present embodiment may include another resin layer other than the sealant layer 2 and the base material layer 3 as long as the effects of the present invention are not impaired.
  • an adhesive resin layer 4 and a pinhole-resistant layer 5 are laminated on the base layer 3 as other resin layers.
  • the adhesive resin layer 4 is a resin layer provided to increase the interlayer strength of each resin layer constituting the multilayer film 1 other than the layer between the sealant layer 2 and the base material layer 3 described above.
  • the adhesive resin applicable to the adhesive resin layer 4 a known adhesive olefin resin, for example, an adhesive polypropylene resin, an adhesive polyethylene resin, or the like is used.
  • the adhesive resin layer 4 may contain an antioxidant to prevent its oxidation.
  • a known antioxidant for example, a hindered phenol-based antioxidant, a phosphorus-based antioxidant, a thioether-based antioxidant, or the like is used alone or in combination of two or more.
  • the adhesive resin layer 4 may contain cellulose nanofibers from the viewpoint of improving adhesiveness and mechanical properties.
  • the thickness of the adhesive resin layer 4 is not particularly limited as long as each layer can be joined with a required adhesive strength, but is preferably 2 to 30 ⁇ m, more preferably 5 to 25 ⁇ m.
  • the pinhole-resistant layer 5 is a resin layer provided for imparting pinhole resistance to the multilayer film 1.
  • the pinhole-resistant layer 5 preferably contains a polyamide resin from the viewpoint of improving the pinhole resistance.
  • the polyamide resin contained in the anti-pinhole layer 5 include 4-nylon, 6-nylon, 7-nylon, 11-nylon, 12-nylon, 46-nylon, 66-nylon, 69-nylon, and 610-nylon Nylon, 611-nylon, 612-nylon, 6T-nylon, 6I nylon, 6-nylon and 66-nylon copolymer (nylon 6/66), 6-nylon and 610-nylon copolymer, 6-nylon and 611-nylon Copolymer, copolymer of 6-nylon and 12-nylon (nylon 6/12), copolymer of 6-nylon and 612 nylon, copolymer of 6-nylon and 6T-nylon, copolymer of 6-nylon and 6I-nylon, 6-nylon
  • the total thickness of the pinhole-resistant layer 5 is not particularly limited, but is preferably 10 to 90 ⁇ m, and more preferably 12 to 50 ⁇ m.
  • the multilayer film 1 of the present embodiment may contain a known lubricant or additive in the above-described sealant layer 2 and base material layer 3 for the purpose of preventing slippage and blocking and imparting anti-fogging property as needed. You may give.
  • organic lubricants such as oleic amide and erucamide
  • inorganic lubricants such as silica, zeolite and calcium carbonate
  • a known surfactant or the like can be appropriately used.
  • the method for producing the above-mentioned multilayer film 1 is not particularly limited, but a co-extrusion T-die method such as a feed block method or a multi-manifold method in which a resin or the like as a raw material is melt-extruded by several extruders, An air-cooled or water-cooled co-extrusion inflation method and a laminating method are mentioned. Among them, a method of forming a film by a co-extrusion T-die method is particularly preferable because it is excellent in controlling the thickness of each layer.
  • Examples of the laminating method include a dry laminating method, a laminating method, a hot laminating method, a wet laminating method, and a thermal (thermal) laminating method in which a single-layer sheet or film forming each layer is bonded using an appropriate adhesive. And their methods can be used in combination. Moreover, you may laminate
  • the package of the present embodiment includes the above-described multilayer film and sterile paper, and at least a part of the sealant layer of the multilayer film is heat-sealed to the surface of the sterile paper.
  • the sterilizing paper applicable to the package of the present embodiment is heat-sealable with a sealant layer, has air permeability, prevents bacteria from passing therethrough (has a fungicidal property), and is sterilized.
  • the sheet is not particularly limited as long as it can be processed and is a sheet mainly composed of paper. Examples of the sterilized paper include Medica D (manufactured by Oji F-Tex).
  • the sterilized paper has small holes that are capable of exhibiting air permeability and bacterial barrier properties. Specifically, it is preferably made of sterilized paper having a fiber weight in the range of 0.0001 to 20 dtex and a basis weight of 10 to 300 g / m 2 .
  • the package of the present embodiment can be used as a deep-drawn package by deep-drawing the bottom material, filling it with contents such as gauze, covering it with a lid, and heat-sealing.
  • contents such as gauze
  • a lid a lid
  • heat-sealing a good deep-drawn package can be obtained.
  • the package of the present embodiment can be manufactured by bonding a multilayer film used as a bottom material and sterilized paper used as a lid material by bonding means such as heat sealing.
  • a package can be produced by heat-sealing the multilayer film and sterilized paper, preferably in a temperature range of 135 to 155 ° C.
  • the sealing strength between the multilayer film 1 and the sterilized paper is preferably 1.0 to 7.7 N / 15 mm, and is 1.2 to 6.0 N / 15 mm. Is more preferable.
  • the sealing property of the package is higher, and if it is not more than the upper limit, better openability (such as tearing of fibers and fluffing during peeling). Suppression) is obtained.
  • the sealant layer provided to be the surface layer contains at least linear low-density polyethylene, and the density of the linear low-density polyethylene. Is 0.93 or more, the package obtained by heat-sealing the multilayer film and the sterilized paper has an appropriate sealing strength, and when the sterilized paper is peeled off, paper residue remains on the peeling surface of the bottom material. It has an excellent effect that generation can be suppressed and a package having no hygiene problem can be provided.
  • the package of the present embodiment is configured to include the multilayer film 1 and sterilized paper, and the sealing strength between the multilayer film 1 and the sterilized paper is 1.0 to 7.7 (N / 15 mm). Are more excellent in terms of seal strength and easy peelability.
  • the multilayer film 1 shown in FIG. 1 has a configuration in which the sealant layer 2 and the base material layer 3 are laminated in this order, but this is an example, and the present invention is not limited to this.
  • the multilayer film according to one embodiment of the present invention includes a sealant layer 2, a base layer 30, a base layer 31, an adhesive resin layer 4, and a pinhole-resistant layer 5 laminated in this order.
  • the adhesive resin layer 4 and the pinhole-resistant layer 5 may be alternately laminated two by two, or three or more layers may be alternately laminated. It may be.
  • a layer having another function may be newly provided between each layer or on the outermost layer opposite to the sealant layer 2.
  • a resin layer made of an ethylene-vinyl alcohol copolymer resin may be provided.
  • a resin layer made of a polypropylene-based resin (PP) may be provided.
  • PP polypropylene-based resin
  • a resin layer composed of an ethylene-vinyl acetate copolymer layer (EVA layer) or a polyethylene layer (PE layer) may be provided.
  • Example 1 A multilayer film having the configuration shown in FIG. 1 and further including the adhesive resin layer and the pinhole-resistant layer in the lamination order shown in FIG. 2 was produced by the following procedure. First, nylon (manufactured by Ube Industries, product number: 1022B) was prepared as a resin contained in the pinhole-resistant layer. Further, as a resin contained in the adhesive resin layer (hereinafter, simply referred to as “adhesive layer”), an adhesive polyethylene resin (manufactured by Mitsui Chemicals, Inc., product number: NF536) was prepared.
  • polyethylene manufactured by Ube Maruzen Polyethylene Corporation, product number: F222NH
  • a resin contained in the sealant layer a metallocene-catalyzed linear low-density polyethylene (mLLDPE) resin (manufactured by Ube Maruzen Polyethylene Co., Ltd., product number: 4040FC, melting point 126 ° C.) and a low-density polyethylene (LDPE) (Ube Maruzen Polyethylene Co., Ltd.) (Product number: F222NH, melting point: 110 ° C.), and these were mixed (kneaded) in a ratio of 80:20.
  • mLLDPE linear low-density polyethylene
  • LDPE low-density polyethylene
  • the density of the resin contained in the resulting sealant layer was 0.938 g / cm 3.
  • a multilayer film having a four-layer structure in the order of sealant layer / base layer / adhesive resin layer / pinhole-resistant layer was produced (laminated) by extrusion.
  • the thickness of the sealant layer was 12 ⁇ m
  • the thickness of the base material layer was 68 ⁇ m
  • the thickness of the adhesive resin layer was 14 ⁇ m
  • the thickness of the pinhole-resistant layer was 16 ⁇ m.
  • the density of the resin contained in the sealant layer was measured using a specific gravity measuring device (Shibayama Scientific Instruments) based on the density gradient tube method of JIS K7112.
  • the melting point was measured by differential scanning calorimetry (DSC, DSC6200, manufactured by Hitachi High-Tech Science Corporation) in a nitrogen atmosphere from 25 ° C to 300 ° C, at a rate of 5 ° C / min, and then to 25 ° C. It was cooled at a rate of ⁇ 50 ° C./min, heated again from 25 ° C. to 300 ° C. at a rate of 5 ° C./min, and measured at the time of re-heating to obtain a temperature.
  • DSC differential scanning calorimetry
  • Example 2 As the resin contained in the sealant layer, instead of the metallocene-catalyzed linear low-density polyethylene (mLLDPE) resin (manufactured by Ube Maruzen Polyethylene Co., Ltd., product number: 4040FC), a metallocene-catalyzed linear low-density polyethylene (mLLDPE) resin (Sumitomo Chemical)
  • mLLDPE metallocene-catalyzed linear low-density polyethylene
  • FV407 product number: FV407, melting point: 124 ° C.
  • the density of the resin contained in the resulting sealant layer (g / cm 3) was 0.930 g / cm 3.
  • the thickness of the sealant layer was 14 ⁇ m
  • the thickness of the base material layer was 68 ⁇ m
  • the thickness of the adhesive resin layer was 14 ⁇ m
  • the thickness of the pinhole-resistant layer was 16 ⁇ m.
  • Example 3 As the resin contained in the sealant layer, instead of the metallocene-catalyzed linear low-density polyethylene (mLLDPE) resin (manufactured by Ube Maruzen Polyethylene Co., part number: 4040FC), a metallocene-catalyzed linear low-density polyethylene (mLLDPE) resin (prime polymer) (Product number: SP3530, melting point: 97, 121, 125 ° C.), except that sealant layer / base material layer / adhesive resin layer / pinhole-resistant layer were used in the same manner as in Example 1. A multilayer film having the configuration was produced (laminated) by extrusion.
  • mLLDPE metallocene-catalyzed linear low-density polyethylene
  • the density of the resin contained in the resulting sealant layer (g / cm 3) was 0.931 g / cm 3.
  • the thickness of the sealant layer was 14 ⁇ m
  • the thickness of the base material layer was 68 ⁇ m
  • the thickness of the adhesive resin layer was 14 ⁇ m
  • the thickness of the pinhole-resistant layer was 16 ⁇ m.
  • Example 4 As the resin contained in the sealant layer, low-density polyethylene (LDPE) was not used, and a metallocene-catalyzed linear low-density polyethylene (mLLDPE) resin (manufactured by Ube Maruzen Polyethylene Co., Ltd., product number: 4040FC, melting point 126 ° C., density 0.938 g) / Cm 3 ), except that only a sealant layer / substrate layer / adhesive resin layer / pinhole-resistant layer was formed in the same manner as in Example 1 except that only a multilayer film was extruded. (Laminated). The density of the resin contained in the resulting sealant layer (g / cm 3) was 0.938 g / cm 3. The thickness of the sealant layer was 12 ⁇ m, the thickness of the base material layer was 68 ⁇ m, the thickness of the adhesive resin layer was 14 ⁇ m, and the thickness of the pinhole-resistant layer was 16 ⁇ m.
  • mLLDPE metallocen
  • mLLDPE metallocene-catalyzed linear low-density polyethylene
  • DLD metallocene-catalyzed linear low-density polyethylene
  • sealant layer / base layer / adhesive resin layer / pinhole-resistant layer was used in the same manner as in Example 1.
  • a multilayer film having a layer configuration was produced (laminated) by extrusion.
  • the density (g / cm 3 ) of the resin contained in the obtained sealant layer was 0.915 g / cm 3 .
  • the thickness of the sealant layer was 14 ⁇ m
  • the thickness of the base material layer was 68 ⁇ m
  • the thickness of the adhesive resin layer was 14 ⁇ m
  • the thickness of the pinhole-resistant layer was 16 ⁇ m.
  • the evaluation of the low molecular weight volatile component is performed by pyrolysis-GC-MS (pyrolyzer: Frontier Laboratories, PY-2020iD type heating furnace type pyrolyzer, GC: Agilent Technologies, 6890N type gas chromatograph, MS: Agilent) Using a 5975B type mass detector (manufactured by Technology Co., Ltd.), about 27 mg of a linear low-density polyethylene sample contained in the sealant layer was heated under a heating atmosphere of helium at 120 ° C. for 10 minutes.
  • GC-MS measurement was performed using an acetone-diluted solution of n-decane having a known concentration, the peak area values of the generated gas components were compared, and the converted quantification values for the standard sample were summed up. It was calculated as a weight fraction relative to the sample weight.
  • Table 2 shows the weight fraction with respect to the sample weight of each linear low-density polyethylene in Examples and Comparative Examples.
  • the molecular weight distribution (Mw / Mn) of the linear low-density polyethylenes of Examples and Comparative Examples was measured using a GPC apparatus (Apparatus: PL-GPC220 manufactured by Agilent, column: Agilent PLgel Olexis x 2 + Guard). After the linear low-density polyethylene of the example was eluted with orthodichlorobenzene, it was injected into a column at a temperature of 145 ° C, a concentration of 0.1 wt / vol%, and a flow rate of 1.0 ml / min, and the amount of elution was detected by a differential refractometer.
  • Table 3 shows the molecular weight distribution (Mw / Mn) and the number average molecular weight (Mn) of the linear low-density polyethylenes of Examples and Comparative Examples. In the table, "-" indicates that the evaluation has not been performed.
  • the sealing strength was higher than when the sealing temperature was 130 ° C.
  • the case where the sealing temperature is 140 ° C. and 150 ° C. is particularly excellent in both the high sealing strength and the effect of suppressing the residual paper on the peeled surface.
  • Comparative Examples 1 to 3 in any of the evaluation samples having a sealing temperature of 130 ° C. or higher, a remarkable paper residue on the peeled surface occurred. In particular, in Comparative Example 3, in all the evaluation samples having a sealing temperature of 130 ° C. or higher, a remarkable paper residue occurred on the peeled surface.
  • Table 2 shows the results of pyrolysis-GC-MS for Examples 1, 3 and 4. From these results, it can be seen that Examples 1 and 4 have a smaller amount of low molecular weight volatile components by GC-MS as compared with Example 3, so that less gas is generated during molding and equipment contamination can be further prevented. Inferred.
  • Example 3 shows the evaluation of equipment contamination with a press machine for Examples 1 to 3 and Comparative Examples 1 to 3. From these results, it can be seen that in Example 3 in which the amount of low-molecular-weight volatile components in GC-MS is larger than that in Example 1, the migration of low-molecular-weight volatile components is larger and the equipment is more easily contaminated.
  • Table 2 shows melting points (melting point peak temperatures) of Examples 1 to 4 and Comparative Examples 1 to 3 based on DSC measurement results. From these results, Examples 1, 2 and 4 have the highest melting point peak temperature of 120 ° C. or higher and the lowest melting point peak does not exist at 100 ° C. or lower as compared with Example 3, thereby further preventing equipment contamination. It is speculated that it can be done.
  • Examples 1 and 4 have narrower molecular weight distributions and smaller amounts of low molecular weight components than those of Example 3, and It is considered that there is no generation of extraneous matter even when the operation time of the equipment is long because the amount of extraneous matter attached to the hot plate is small and the production equipment can be prevented from being contaminated.
  • the multilayer film and the package of the present invention can be used as a package for medical devices such as gauze and catheter and medical devices.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)
PCT/JP2019/027680 2018-07-23 2019-07-12 多層フィルム及び包装体 WO2020022106A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2019565969A JP6659002B1 (ja) 2018-07-23 2019-07-12 多層フィルム及び包装体
CN201980040615.8A CN112313077A (zh) 2018-07-23 2019-07-12 多层膜及包装体

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2018-137395 2018-07-23
JP2018137395 2018-07-23
JP2019040869 2019-03-06
JP2019-040869 2019-03-06
JP2019-123818 2019-07-02
JP2019123818 2019-07-02

Publications (1)

Publication Number Publication Date
WO2020022106A1 true WO2020022106A1 (ja) 2020-01-30

Family

ID=69180484

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/027680 WO2020022106A1 (ja) 2018-07-23 2019-07-12 多層フィルム及び包装体

Country Status (4)

Country Link
JP (1) JP6659002B1 (zh)
CN (1) CN112313077A (zh)
TW (1) TW202007531A (zh)
WO (1) WO2020022106A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023190581A1 (ja) * 2022-03-31 2023-10-05 藤森工業株式会社 滅菌バッグ

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1112558A (ja) * 1997-04-30 1999-01-19 Mitsui Chem Inc レトルトフィルムのシーラント用樹脂組成物およびシーラントフィルム
JP2000052514A (ja) * 1992-12-03 2000-02-22 Mitsubishi Chemicals Corp 積層体
WO2006013919A1 (ja) * 2004-08-06 2006-02-09 Idemitsu Unitech Co., Ltd. 包装容器及び医療用包装シート
JP2006256144A (ja) * 2005-03-17 2006-09-28 Mitsubishi Plastics Ind Ltd 深絞り成形用共押出フィルム、深絞り包装体用底材及び深絞り包装体
JP2012081615A (ja) * 2010-10-08 2012-04-26 Japan Polyethylene Corp 包装材料およびそれを用いた液体包装袋
JP2015517441A (ja) * 2012-05-10 2015-06-22 ベリー プラスチックス コーポレイション 包装用の可剥性フィルム
JP2016104529A (ja) * 2014-12-01 2016-06-09 三菱樹脂株式会社 高圧蒸気滅菌用共押出多層フィルム、および包装体

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106255595A (zh) * 2014-04-28 2016-12-21 三得为株式会社 多层密封膜

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000052514A (ja) * 1992-12-03 2000-02-22 Mitsubishi Chemicals Corp 積層体
JPH1112558A (ja) * 1997-04-30 1999-01-19 Mitsui Chem Inc レトルトフィルムのシーラント用樹脂組成物およびシーラントフィルム
WO2006013919A1 (ja) * 2004-08-06 2006-02-09 Idemitsu Unitech Co., Ltd. 包装容器及び医療用包装シート
JP2006256144A (ja) * 2005-03-17 2006-09-28 Mitsubishi Plastics Ind Ltd 深絞り成形用共押出フィルム、深絞り包装体用底材及び深絞り包装体
JP2012081615A (ja) * 2010-10-08 2012-04-26 Japan Polyethylene Corp 包装材料およびそれを用いた液体包装袋
JP2015517441A (ja) * 2012-05-10 2015-06-22 ベリー プラスチックス コーポレイション 包装用の可剥性フィルム
JP2016104529A (ja) * 2014-12-01 2016-06-09 三菱樹脂株式会社 高圧蒸気滅菌用共押出多層フィルム、および包装体

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023190581A1 (ja) * 2022-03-31 2023-10-05 藤森工業株式会社 滅菌バッグ

Also Published As

Publication number Publication date
JPWO2020022106A1 (ja) 2020-08-06
TW202007531A (zh) 2020-02-16
JP6659002B1 (ja) 2020-03-04
CN112313077A (zh) 2021-02-02

Similar Documents

Publication Publication Date Title
JP7060029B2 (ja) 包装体
JP4702245B2 (ja) 共押出多層フィルム、並びに該フィルムを用いたラミネートフィルム及び包装材
JP6172398B2 (ja) 多層フィルム、包装材用積層フィルム、包装袋及びスタンディングパウチ
KR20150088807A (ko) 저흡착성 라미네이트용 다층 필름, 이를 사용한 복합 필름 및 포장재
JP2017177579A (ja) 易剥離性シーラントフィルム
JP6287364B2 (ja) 包装材料及びそれを用いた包装容器
JP6659002B1 (ja) 多層フィルム及び包装体
JP6828385B2 (ja) 多層フィルム及び包装体
JP6150687B2 (ja) 多層シーラントフィルム
WO2021075449A1 (ja) 多層フィルム及び包装体
JP2019177692A (ja) 多層フィルム及び包装体
JP5935372B2 (ja) ひねり包装用フィルム及びひねり包装体
JP2014162162A (ja) 易剥離性多層フィルムおよび易剥離性医療用包装体
JP2021154606A (ja) 多層フィルム及び包装体
WO2018225521A1 (ja) 易開封性積層フィルム及び包装容器
TW201821278A (zh) 積層薄膜、複層薄膜及包裝容器
JP6547864B2 (ja) 包装材料及びそれを用いた包装容器
JP6652016B2 (ja) 共押出多層フィルム、積層フィルムおよび医療用包装体
WO2006002806A1 (en) Laminate
JP2004042313A (ja) イージーピール性多層複合フィルム
JP2009035308A (ja) ポリプロピレン製容器の蓋材用シーラントフィルム
JP2023015832A (ja) 多層フィルム及び包装体
JP2023015831A (ja) 多層フィルム及び包装体
JP2023124607A (ja) 多層フィルム及び包装体
JP2023124606A (ja) 多層フィルム、包装体、及び包装体の製造方法

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2019565969

Country of ref document: JP

Kind code of ref document: A

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19839918

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19839918

Country of ref document: EP

Kind code of ref document: A1