WO2020196700A1 - Corps moulé en film et corps d'emballage - Google Patents

Corps moulé en film et corps d'emballage Download PDF

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Publication number
WO2020196700A1
WO2020196700A1 PCT/JP2020/013521 JP2020013521W WO2020196700A1 WO 2020196700 A1 WO2020196700 A1 WO 2020196700A1 JP 2020013521 W JP2020013521 W JP 2020013521W WO 2020196700 A1 WO2020196700 A1 WO 2020196700A1
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Prior art keywords
film
resin
thickness
molded
layer
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Application number
PCT/JP2020/013521
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English (en)
Japanese (ja)
Inventor
慎太郎 奥
Original Assignee
住友ベークライト株式会社
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Priority to JP2020552919A priority Critical patent/JP6897886B2/ja
Publication of WO2020196700A1 publication Critical patent/WO2020196700A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
    • B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
    • B65D75/32—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents
    • B65D75/34—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents and having several recesses to accommodate a series of articles or quantities of 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
    • B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
    • B65D75/32—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents
    • B65D75/36—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents one sheet or blank being recessed and the other formed of relatively stiff flat sheet material, e.g. blister packages, the recess or recesses being preformed

Definitions

  • the present invention relates to a film molded body and a packaged body.
  • This application claims priority based on Japanese Patent Application No. 2019-62635 filed in Japan on March 28, 2019 and Japanese Patent Application No. 2019-112072 filed in Japan on June 17, 2019. , The contents are used here.
  • the manufacturing apparatus 200 includes a molding portion 210 for molding a film to obtain a molded body, an accommodating portion 220 for accommodating the molded body, and an adhesive portion 230 for adhering a cover film to the molded body.
  • the film is thermoformed by the molding portion 210 to produce a molded body having the protruding molded portion, and the molded body is formed into a roll having a plurality of recesses corresponding to the protruding molded portion such as the accommodating portion 220.
  • Examples thereof include a method of manufacturing PTP by accommodating and adhering a cover film by an adhesive portion 230.
  • Patent Document 1 discloses a method of orienting crystals in a multilayer film by stretching a multilayer film made of a polymer material as a means for improving impact resistance and gas barrier properties. Then, a multilayer film (multilayer film molded product) having an improved suitable oxygen barrier property and a multilayer package using the same are disclosed.
  • the multilayer film used for the packaging body and the molded product thereof are required to have excellent push-through property from the viewpoint of user friendliness in addition to the above-mentioned impact resistance and gas barrier property.
  • a multi-layer film molded product such as the molded product disclosed in Patent Document 1
  • the crystals in the molded product are oriented, the impact resistance and the gas barrier property are excellent, but the push-through property is improved.
  • the push-through property is improved. There is a problem of inferiority.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a film molded body having excellent push-through property and a package body provided with the film molded body.
  • the present invention adopts the following configuration.
  • a plate portion and a projecting molded portion that projects to one surface side in the thickness direction of the plate portion and opens to the other surface side are provided, and the thickness of the top wall central portion of the projecting molded portion is the protrusion.
  • the thickness of the central side wall or the lower part of the neck of the protruding molded portion of the film molded product is 20% to 100% of the thickness of the central portion of the top wall of the protruding molded portion, according to [1].
  • Film molded body is 20% to 100% of the thickness of the central portion of the top wall of the protruding molded portion.
  • the drawing ratio of the overhanging molded portion of the film molded body is 0.35 to 0.60, [1] or [2].
  • the unstretched first film layer containing the first resin and the unstretched second film layer containing a second resin different from the first resin are alternately repeated.
  • a package body comprising the film molded body according to any one of [1] to [5].
  • the present invention it is possible to provide a film molded body having a protruding molded portion having excellent push-through property and a package body provided with the film molded body.
  • FIG. 1 It is a figure which shows typically one Embodiment of the multilayer film molded article of this invention. It is an enlarged cross-sectional view of the projecting molded portion in the multilayer film molded body of this embodiment, and shows the form in which the thickness of the side wall portion of the protruding molded portion is uniform.
  • A) is an enlarged cross-sectional view of the projecting molded portion before crushing the projecting molded portion.
  • (B) is an enlarged cross-sectional view for explaining the shape change when the protruding molded portion is crushed.
  • push-through property means the ease of pushing the protruding molded portion of the film molded body.
  • the multilayer film molded product according to the embodiment of the present invention has an unstretched first film layer containing a first resin and an unstretched second film layer containing a second resin different from the first resin. And are formed of a multilayer film including a barrier layer in which the above steps are alternately repeated. Therefore, the multilayer film molded product of the present embodiment also has an unstretched first film layer containing the first resin and an unstretched second film layer containing a second resin different from the first resin. And, are alternately repeated to provide a laminated barrier layer.
  • "alternately and repeatedly laminated" means two or more layers.
  • FIG. 1 is a diagram schematically showing an embodiment of the multilayer film molded product of the present invention.
  • the multilayer film molded body 1 of the present embodiment has a barrier layer 11, a pair of unstretched first outer layers 12 sandwiching the barrier layer 11, and a pair of unstretched first outer layers 12 sandwiching the first outer layer 12.
  • a second outer layer 13 is provided.
  • the barrier layer 11 contains an unstretched first film layer 111 containing a first resin and an unstretched second film containing a second resin different from the first resin.
  • the film layer 112 and the film layer 112 are alternately and repeatedly laminated.
  • the first film layer 111 is an unstretched film containing the first resin.
  • the first film layer 111 may contain only the first resin (that is, may be made of the first resin), or may contain the first resin and components other than the first resin. It may (that is, it may consist of a first resin and a component other than the first resin).
  • the first resin examples include crystalline resin and amorphous resin.
  • the crystalline resin include polyolefin resins such as polyethylene, polypropylene and polymethylpentene; polyamide resins such as nylon 6 and nylon 66; polyethylene terephthalate, polybutylene terephthalate, polybutylene succinate, polyethylene-2, Polyester resin such as 6-naphthalate; Fluorine resin such as polychlorotrifluoroethylene (PCTFE), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), perfluoroalkoxyfluororesin (PFA); polyvinylidene chloride (PVDC); ethylene-vinyl alcohol copolymer (EVOH); polyacetal resin; polylactic acid resin; polyglycolic acid resin; polycaprolactone resin; copolymer resin containing a monomer forming the above resin and the like.
  • PCTFE polychlorotrifluoroethylene
  • PTFE polytetra
  • amorphous resin examples include polyvinyl chloride (PVC); polystyrene (PS); acrylic resins such as polymethyl methacrylate (PMMA); cycloolefin polymers (COP), cycloolefin copolymers (COC), and the like. Cyclic olefin resin; Polycarbonate (PC) and the like.
  • PVC polyvinyl chloride
  • PS polystyrene
  • acrylic resins such as polymethyl methacrylate (PMMA)
  • COP cycloolefin polymers
  • COC cycloolefin copolymers
  • Cyclic olefin resin Polycarbonate (PC) and the like.
  • PC Polycarbonate
  • the first resin is preferably a polyolefin resin. Since the polyolefin-based resin is softer than other materials, when a projecting molded portion projecting in the thickness direction is provided, the projecting molded portion can be sufficiently pushed in with a low load, and the solid agent can be easily taken out. .. In addition, since it is not necessary to use halogens such as fluorine and chlorine, there is an advantage that it is environmentally friendly.
  • polypropylene is preferable. Since polypropylene is a general-purpose resin among polyolefin-based resins, it is possible to reduce the cost. Further, the barrier layer 11 can be provided with higher heat resistance and excellent push-through property.
  • the content of the first resin in the first film layer 111 is preferably 60 to 100% by mass, more preferably 70 to 100% by mass, and even more preferably 80 to 100% by mass. ..
  • the push-through property is further improved.
  • the component other than the first resin which may be contained in the first film layer 111, may be a resin component or a non-resin component.
  • examples of the non-resin component include additives known in the art.
  • examples of the additive include antioxidants, antistatic agents, crystal nucleating agents, inorganic particles, organic particles, thickeners, thickeners, heat stabilizers, lubricants, infrared absorbers, ultraviolet absorbers and the like. Can be mentioned.
  • the components other than the first resin, which may be contained in the first film layer 111 may be only one kind or two or more kinds, and when there are two or more kinds, the combination and ratio thereof depend on the purpose. Can be selected arbitrarily.
  • the number of layers of the first film layer 111 in the barrier layer 11 is preferably 2 or more, more preferably 250 or more, further preferably 300 or more, and even more preferably 450 or more. , 600 or more is particularly preferable, and 750 or more is most preferable.
  • the number of layers of the first film layer 111 in the barrier layer 11 is preferably 5000 or less, more preferably 4500 or less, further preferably 4000 or less, and further preferably 3500 or less. More preferably, it is particularly preferably 2500 or less, and most preferably 2000 or less.
  • the number of layers of the first film layer 111 in the barrier layer 11 is, for example, any of 2 to 5000, 250 to 4500, 300 to 4000, 450 to 3500, 600 to 3000, 750 to 2500, and 750 to 2000. You may.
  • the number of layers of the first film layer 111 can be confirmed by, for example, cutting the multilayer film molded body 1 using a microtome and observing the cross section of the multilayer film molded body 1 produced by this cutting using an electron microscope. it can.
  • the second film layer 112 is an unstretched film layer and contains a second resin of a type different from that of the first resin.
  • the second film layer 112 may contain only the second resin (that is, may be made of the second resin), or may contain the second resin and components other than the second resin. It may (that is, it may consist of a second resin and a component other than the second resin).
  • the second resin examples include crystalline resin and amorphous resin.
  • the crystalline resin include polyolefin resins such as polyethylene, polypropylene and polymethylpentene; polyamide resins such as nylon 6 and nylon 66; polyethylene terephthalate, polybutylene terephthalate, polybutylene succinate, polyethylene-2, Polyester resin such as 6-naphthalate; Fluorine resin such as polychlorotrifluoroethylene (PCTFE), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), perfluoroalkoxyfluororesin (PFA); polyvinylidene chloride (PVDC); ethylene-vinyl alcohol copolymer (EVOH); polyacetal resin; polylactic acid resin; polyglycolic acid resin; polycaprolactone resin; copolymer resin containing a monomer forming the above resin and the like.
  • PCTFE polychlorotrifluoroethylene
  • PTFE polytetra
  • amorphous resin examples include polyvinyl chloride (PVC), polystyrene (PS), and acrylic resins such as polymethyl methacrylate (PMMA); cycloolefin polymer (COP), and cycloolefin copolymer (COC). Cyclic olefin resin such as, etc .; Polycarbonate (PC) and the like can be mentioned.
  • PVC polyvinyl chloride
  • PS polystyrene
  • acrylic resins such as polymethyl methacrylate (PMMA); cycloolefin polymer (COP), and cycloolefin copolymer (COC).
  • Cyclic olefin resin such as, etc .; Polycarbonate (PC) and the like can be mentioned.
  • PC Polycarbonate
  • the second resin one or a combination of two or more of these can be used.
  • the second resin is preferably a polyolefin resin. Since the polyolefin-based resin is softer than other materials, when a projecting molded portion projecting in the thickness direction is provided, the projecting molded portion can be sufficiently pushed in with a low load, and the solid agent can be easily taken out. .. In addition, since it is not necessary to use halogens such as fluorine and chlorine, there is an advantage that it is environmentally friendly.
  • polyethylene is preferable, and high-density polyethylene (HDPE) is more preferable. Since polyethylene is a general-purpose resin among polyolefin-based resins, it is possible to reduce the cost.
  • HDPE high-density polyethylene
  • the content of the second resin in the second film layer 112 is preferably 60 to 100% by mass, more preferably 70 to 100% by mass, and even more preferably 80 to 100% by mass. ..
  • the barrier property is improved.
  • the component other than the second resin which may be contained in the second film layer 112 may be a resin component or a non-resin component.
  • examples of the non-resin component include the same components as those described in the first film layer.
  • the number of layers of the second film layer 112 in the barrier layer 11 is preferably 2 or more, more preferably 250 or more, further preferably 300 or more, and even more preferably 450 or more. , 600 or more is particularly preferable, and 750 or more is most preferable.
  • the number of layers of the second film layer 112 in the barrier layer 11 is preferably 5000 or less, more preferably 4500 or less, further preferably 4000 or less, and further preferably 3500 or less. More preferably, it is particularly preferably 2500 or less, and most preferably 2000 or less.
  • the number of layers of the second film layer 112 in the barrier layer 11 is, for example, 2 to 5000, 250 to 4500, 300 to 4000, 450 to 3500, 600 to 3000, 750 to 2500, and 750 to 2000. You may.
  • the number of layers of the second film layer 112 can be confirmed by the same method as in the case of the number of layers of the first film layer 111 described above.
  • the total number of layers of the first film layer 111 and the second film layer 112 in the barrier layer 11 is preferably 4 or more, more preferably 500 or more, further preferably 600 or more, and 900 or more. It is even more preferably 1200 or more, and most preferably 1500 or more.
  • the total number of layers of the first film layer 111 and the second film layer 112 in the barrier layer 11 is preferably 10,000 or less, more preferably 9000 or less, and further preferably 8000 or less. It is even more preferably 7,000 or less, particularly preferably 5,000 or less, and most preferably 4000 or less.
  • the total number of layers of the first film layer 111 and the second film layer 112 in the barrier layer 11 is 4 to 10000, 500 to 9000, 600 to 8000, 900 to 7000, 1200 to 6000, 1500 to 5000, and 1500. It may be any of ⁇ 4000.
  • the combination of the first resin and the second resin used together in the multilayer film molded product 1 is preferably a polyolefin-based resin and a polyolefin-based resin different from the polyolefin-based resin.
  • a combination of polypropylene and high-density polyethylene is preferably mentioned from the viewpoint of push-through property and cost.
  • first outer layer 12 examples include those containing the above-mentioned first resin. Specifically, it is preferable to contain a polyolefin resin, and it is more preferable to contain polypropylene (PP) from the viewpoint of push-through property and cost.
  • PP polypropylene
  • the content of the first resin in the first outer layer 12 is preferably 60 to 100% by mass, more preferably 80 to 100% by mass, and even more preferably 90 to 100% by mass.
  • the first outer layer 12 may contain a resin component other than the first resin, or may contain a non-resin component.
  • the non-resin component include those similar to the additives described in the first film layer.
  • the first outer layer 12 is made of polypropylene (PP).
  • Examples of the second outer layer 13 include those containing the above-mentioned first resin. Specifically, it is preferable to contain a polyolefin resin, and it is more preferable to contain polypropylene (PP) from the viewpoint of push-through property and cost.
  • PP polypropylene
  • the content of the first resin in the second outer layer 13 is preferably 60 to 100% by mass, more preferably 80 to 100% by mass, and even more preferably 90 to 100% by mass.
  • the second outer layer 13 is preferably made of polypropylene (PP).
  • the multilayer film molded body 1 has a plate portion 24 and one surface in the thickness direction of the plate portion 24 (in this specification, it may be referred to as a “first surface”) 1a side. It is provided with a projecting molded portion 2 that projects to the other surface (sometimes referred to as a “second surface” in the present specification) and opens to the 1b side.
  • first surface the thickness direction of the plate portion 24
  • second surface the other surface
  • one surface 1a in the thickness direction of the plate portion 24 and one surface 1a in the thickness direction of the multilayer film molded body 1 are the same.
  • the other surface 1b in the thickness direction of the plate portion 24 and the other surface 1b in the thickness direction of the multilayer film molded body 1 are the same.
  • the plate portion 24 is a portion other than the projecting molded portion 2 in the multilayer film molded body 1.
  • FIG. 1 shows a multilayer film molded body 1 including 10 projecting molded portions 2, but the number of projecting molded portions 2 is not limited to this.
  • the protruding molded portion 2 will be described in detail with reference to FIG. 2 (a).
  • the projecting molded portion 2 includes a top wall portion 21, a side wall portion 22, and a corner portion 23.
  • the side wall portion 22 is formed in a tapered cylindrical shape protruding from the plate portion 24 toward one surface 1a.
  • the top wall portion 21 is formed in a disk shape in the direction along the plate portion 24 on the tip side of the side wall portion 22 opposite to the plate portion 24.
  • the corner portion 23 is a bent portion of a boundary portion between the top wall portion 21 and the side wall portion 22.
  • the central portion located near the extension of the axis of the side wall portion 22 protrudes from the plate portion 24 in the multilayer film molded body 1. It is curved in a dome shape that maximizes the height.
  • the top wall central portion 21a is a central portion of the top wall portion 21 in the plane direction.
  • the side wall central portion 22a is a portion of the side wall portion 22 having an intermediate height protruding from the plate portion 24.
  • the lower part of the neck 22b is the end of the side wall portion 22 on the plate portion 24 side.
  • the thickness of the top wall central portion 21a is thicker or the same as the thickness of the side wall central portion 22a or the neck lower portion 22b, and the thickness of the top wall central portion 21a is the same. It is preferable that the thickness is thicker than the thickness of the central side wall portion 22a or the lower neck portion 22b. As a result, the multilayer film molded body 1 of the present embodiment is excellent in push-through property.
  • the thickness can be measured with, for example, a digital indicator (Digimatic Indicator ID-C112 manufactured by Mitutoyo Co., Ltd.).
  • the thickness of the top wall portion 21 may be gradually reduced from the center portion 21a of the top wall portion to the corner portion 23, gradually increased in thickness, or uniformly thickened.
  • the thickness of the side wall portion 22 may be gradually reduced from the end on the corner side to the lower part of the neck 22b, gradually increased, or the thickness may be uniform.
  • the thickness of the side wall central portion 22a or the neck lower portion 22b is preferably 20% or more, more preferably 30% or more of the thickness of the top wall central portion 21a. preferable. Further, in the multilayer film molded body 1 of the present embodiment, the thickness of the side wall central portion 22a or the neck lower portion 22b is preferably 100% or less, preferably 95% or less of the thickness of the top wall central portion 21a. Is more preferable.
  • the thickness of the side wall central portion 22a or the neck lower portion 22b is preferably 20% to 100%, more preferably 30% to 95%. If the thickness of the side wall central portion 22a or the neck lower portion 22b is within the above preferable range, the push-through property is more excellent.
  • the thickness of the top wall central portion 21a is thicker than or the same as the thickness of either the side wall central portion 22a or the neck lower portion 22b.
  • the thickness of the side wall central portion 22a and the neck lower portion 22b is preferably 20% or more, preferably 30% or more of the thickness of the top wall central portion 21a. Is more preferable. Further, in the multilayer film molded body 1 of the present embodiment, the thickness of the side wall central portion 22a and the neck lower portion 22b is preferably 100% or less, preferably 95% or less of the thickness of the top wall central portion 21a. Is more preferable.
  • the thickness of the side wall central portion 22a and the neck lower portion 22b is more preferably 20% to 100%, more preferably 30% to 100% of the thickness of the top wall central portion 21a. It is more preferably 95%. If the thickness of the side wall central portion 22a and the neck lower portion 22b is within the above preferable range, the push-through property is further excellent.
  • the thickness of the side wall central portion 22a, the neck lower portion 22b, and the corner portion 23 is preferably 20% or more, preferably 30% or more of the thickness of the top wall central portion 21a. The above is more preferable. Further, in the multilayer film molded body 1 of the present embodiment, the thickness of the side wall central portion 22a, the neck lower portion 22b and the corner portion 23 is preferably 100% or less of the thickness of the top wall central portion 21a. More preferably, it is 95% or less.
  • the thicknesses of the side wall central portion 22a, the neck lower portion 22b, and the corner portion 23 are all 20% to 100% of the thickness of the top wall central portion 21a. It is preferably 20% to 95%, more preferably 30% to 95%. If the thickness of the side wall central portion 22a, the neck lower portion 22b and the corner portion 23 is within the above preferable range, the push-through property is particularly excellent.
  • the drawing ratio of the projecting molded portion 2 is preferably 0.30 or more, more preferably 0.35 or more, and further preferably 0.40 or more. preferable. Further, in the multilayer film molded body 1 of the present embodiment, the drawing ratio of the protruding molded portion 2 is preferably 0.65 or less, and more preferably 0.60 or less. For example, in the multilayer film molded body 1 of the present embodiment, the drawing ratio of the protruding molded portion 2 is preferably 0.30 to 0.65, more preferably 0.35 to 0.60, and 0. It is more preferably .40 to 0.60.
  • the multilayer film molded body 1 of the present embodiment is excellent in push-through property when the drawing ratio of the protruding molded portion 2 is equal to or more than the above-mentioned preferable range.
  • the multilayer film molded body 1 of the present embodiment is excellent in moldability when the drawing ratio of the protruding molded portion 2 is equal to or less than the above-mentioned preferable range.
  • the drawing ratio is a value obtained by dividing the depth D of the protruding molded portion 2 by the diameter R of the protruding molded portion 2 (depth D of the protruding molded portion 2 / diameter R of the protruding molded portion 2).
  • the depth D of the projecting molded portion 2 is a point 21c of a virtual extension of the other surface 1b of the plate portion 24 and a maximum height on the other surface 1b side of the projecting forming portion 2 at the opening of the projecting molded portion 2. Means the distance to.
  • the diameter R of the projecting molded portion 2 is the maximum distance between the portions of the opening edge of the projecting molded portion 2 facing each other in the surface direction along the other surface 1b of the plate portion 24.
  • the side wall portion having a height h60 of 60% from the top surface surface 21b of the top wall having the maximum height hmax of the protruding molded portion 2.
  • a virtual conical surface passing through the outer circumference 22d and the outer circumference 22c of the side wall portion having a height h40 of 40% from the maximum height hmax, and a virtual extension of the other surface 1b of the plate portion 24 or the other surface 1b of the plate portion 24. Means the diameter of the intersection of.
  • the multilayer film molded body 1 of FIG. 2A shows a protruding molded portion 2 having a dome-shaped top wall portion 21, but the outer shape of the protruding molded portion 2 is not limited to this, and a circular flat plate-shaped top. It may be a truncated cone-shaped protruding molded portion 2 or the like having a wall portion 21. Further, the outer shape of the protruding molded portion 2 may be a polygonal shape such as a triangle, a quadrangle, a pentagon, or a hexagon when the multilayer film molded body 1 is viewed in a plan view from the side of the protruding molded portion 2. , Oval shape, etc.
  • the thickness of the plate portion 24 (total thickness of the multilayer film molded body 1) is preferably 20 to 750 ⁇ m, more preferably 50 to 600 ⁇ m, and even more preferably 100 to 500 ⁇ m. If the thickness of the plate portion 24 is within the above-mentioned preferable range, the push-through property is more excellent.
  • the multilayer film molded product of the present embodiment can be manufactured by molding a multilayer film described later.
  • the molding method is not particularly limited, and examples thereof include plug molding, air-assisted plug molding, vacuum forming, compressed air molding, and plug-assisted pneumatic molding.
  • the molding temperature at the time of producing the multilayer film molded product is preferably 80 to 150 ° C, more preferably 90 to 145 ° C.
  • the multilayer film used for producing the multilayer film molded product of the present embodiment can be produced by, for example, the following method. That is, first, a first laminated film having a multi-layer structure is finally produced to form a laminated structure of the first film layer 111 and the second film layer 112. More specifically, the first laminated film has a first resin-containing layer that finally becomes an unstretched first film layer 111 and a second resin-containing layer that finally becomes an unstretched second film layer 112. It has a structure in which resin-containing layers and layers are alternately and repeatedly laminated.
  • the two outermost layers are both the first resin-containing layer, and the number of layers of the second resin-containing layer is only 1 more than the number of layers of the first resin-containing layer.
  • the number of layers of the first resin-containing layer is the number of layers of the second resin-containing layer, and the two layers of the outermost layer are both the second resin-containing layer. Examples thereof include a multi-layer structure having one less than one.
  • the first laminated film is not limited to these.
  • the first laminated film is cut in a direction perpendicular to the surface thereof, and then the two obtained first laminated films are further laminated in these thickness directions to obtain a second laminated film.
  • the second laminated film is stretched and expanded in a direction parallel to the surface thereof, and then the expanded second laminated film is cut and laminated in the same manner as in the case of the first laminated film.
  • the barrier layer 11 is produced by repeatedly expanding, cutting and laminating such a laminated film. For example, when the first laminated film used is one in which the two outermost layers are both the first resin-containing layer, when the first laminated films are laminated to produce the second laminated film.
  • the two first resin-containing layers of the outermost layer that are superposed form apparently one first resin-containing layer in the second laminated film.
  • This also applies to the production of the laminated film and the barrier layer 11 after the second laminated film.
  • the barrier layer 11 shown here is only an example.
  • the first laminated film is produced by, for example, a feed block method in which a resin or the like as a raw material is melt-extruded using several extruders, a coextrusion T-die method such as a multi-manifold method, an air-cooled type or a water-cooled coextrusion method. It can be produced by an inflation method or the like.
  • the production of the target barrier layer from the first laminated film thereafter in the above-mentioned production method can be performed using a multiplier.
  • the constituent components of the first outer layer 12 such as the first resin are dry-blended or melt-kneaded, and the melted resin is melt-extruded into another feed block by several extruders different from the above to form a film.
  • the formed film is used as the first outer layer 12.
  • the first outer layer 12 is laminated on both sides of the barrier layer 11 described above.
  • the components of the second outer layer 13 such as the first resin are dry-blended or melt-kneaded, and the melted resin is melt-extruded into another feed block by several extruders different from the above to form a film.
  • the formed film is used as the second outer layer 13.
  • the second outer layer 13 is laminated on the surface (exposed surface) of the pair of first outer layers 12 described above.
  • the laminated film is cooled and solidified by a cooling roll to control the crystallization of the laminated film and produce a multilayer film. Since the multilayer film produced by this embodiment is not stretched, it is excellent in molding processability.
  • the multilayer film molded body 1 of the present embodiment includes a barrier layer 11 in which a first film layer 111 and a second film layer 112 are alternately and repeatedly laminated. Since the barrier layer 11 has low water vapor permeability, the multilayer film molded product 1 exhibits excellent water vapor barrier properties.
  • the multilayer film molded body 1 of the present embodiment includes a plate portion 24 and a projecting molded portion 2 projecting to one surface 1a side in the thickness direction of the plate portion 24 and opening to the other surface 1b side, and the projecting molded portion 2
  • the thickness of the top wall central portion 21a is thicker than the thickness of the side wall central portion 22a or the neck lower portion 22b of the projecting molded portion 2. Therefore, it is more excellent in push-through property. The reason is not clear, but it is presumed as follows.
  • the thickness of the central portion of the top wall is thinner than the thickness of the central portion of the side wall and the lower part of the neck, so that when a load is applied, the top wall portion, Although the corners and the vicinity of the corners of the side wall are easily deformed, it is presumed that the push-through property is inferior because the deformation at the center of the side wall and the lower part of the neck is unlikely to occur.
  • the thickness of the top wall central portion 21a is the same as that of the side wall portion 22 or thicker or the same as that of the side wall portion 22, and is the center of the side wall.
  • the side wall central portion 22a is first deformed, and then the other side wall portion 22 is deformed as it is with the deformation of the side wall central portion 22a. Since the deformation of the portion also progresses, it is presumed that the entire protruding molded portion 2 is crushed smoothly and the push-through property is excellent.
  • the thickness of the top wall central portion 21a is the same as or the same as the thickness of the side wall portion 22 or the thickness of the side wall portion 22, and the thickness of the side wall central portion is the same.
  • the thickness of the lower neck 22b is thinner than the thickness of the 22a, when a load is applied, the deformation first occurs in the vicinity of the lower neck 22b, and then between the lower neck 22b and the central side wall 22a. Since the deformation progresses and the deformation of other parts of the side wall portion 22 also progresses accordingly, it is presumed that the push-through property is excellent also in this configuration.
  • the multilayer film molded body 1 of the first embodiment shown in FIG. 1 includes a first outer layer 12 and a second outer layer 13, but is not limited to this, and includes a first outer layer 12 and a second outer layer 13. It may be a multilayer film molded product that does not have, or a multilayer film molded product that includes only the first outer layer 12. Further, those multilayer film molded products may be provided with further layers.
  • the multilayer film molded product is preferably provided with the first outer layer 12 in direct contact with the barrier layer 11, and the second outer layer 13 is in direct contact with the first outer layer 12. It is preferable that the film is provided.
  • the package of the present embodiment includes the multilayer film molded product of the present embodiment described above. Since the package of the present embodiment includes the multilayer film molded product of the present embodiment described above, it is excellent in push-through property (tablet take-out property). Further, since the package of the present embodiment includes the multilayer film molded product of the present embodiment having excellent water vapor barrier properties, it has excellent moisture resistance.
  • the packaging body of the present embodiment is suitable as, for example, a packaging bag or a packaging container for packaging foods, pharmaceuticals, and the like.
  • FIG. 4 is a perspective view schematically showing an embodiment of the package of the present invention
  • FIG. 5 is a cross-sectional arrow view of the package shown in FIG. 4 along the line I-I.
  • the same components as those shown in the already explained figures are designated by the same reference numerals as in the case of the already explained figures, and detailed description thereof will be omitted.
  • the package 10 shown in FIGS. 4 and 5 includes a multilayer film molded body 1 and a cover film 101. Then, the multilayer film molded body 1 is formed with a projecting molded portion 2 constituting the solid agent accommodating portion 10a of the package body 10.
  • the package 10 is a PTP (packaging container) as a blister pack, and the solid agent 102 can be hermetically stored in the solid agent accommodating portion 10a.
  • the other surface 1b of the multilayer film molded body 1 is adhered to one surface 101a of the cover film 101.
  • the multilayer film molded body 1 projects toward one surface 1a in a part of the region, and the second surface 1b of the projecting molded portion 2 is adhered to the first surface 101a of the cover film 101.
  • the solid agent accommodating portion 10a is formed by the second surface 1b of the multilayer film molded body 1 and the first surface 101a of the cover film 101.
  • Slits 10b are formed in the multilayer film molded body 1 and the cover film 101.
  • the slit 10b has an arbitrary configuration and does not necessarily have to be formed. However, since the slit 10b is formed, the package 10 is formed for each specific number of the solid agent 102 contained in the solid agent accommodating portion 10a. Since it can be easily divided, the convenience of the package 10 is improved.
  • the projecting molded portion 2 having the dome-shaped top wall portion 21 is shown as the packaging body 10, but the outer shape of the projecting molded portion 2 is not limited to this, and the shape of the solid agent 102 to be stored is not limited to this. It can be selected arbitrarily according to. For example, it may be a truncated cone-shaped protruding molded portion 2 or the like having a circular flat plate-shaped top wall portion 21. Further, the outer shape of the protruding molded portion 2 may be a polygonal shape such as a triangle, a quadrangle, a pentagon, or a hexagon when the multilayer film molded body 1 is viewed in a plan view from the side of the protruding molded portion 2. , Oval shape, etc. Examples of the solid agent 102 include chemicals such as capsules and tablets, and granular foods.
  • the package 10 includes 10 projecting molded portions 2, but the number of projecting molded portions 2 is not limited to this.
  • Examples of the material of the cover film 101 include aluminum and the like.
  • the package of the present embodiment can be manufactured by using the above-mentioned multilayer film and laminating the multilayer films or the multilayer film and another film or the like so as to form a target solid agent accommodating portion.
  • the packaging body 10 shown in FIGS. 4 and 5 can be manufactured using a known PTP packaging machine. More specifically, first, the projecting molded portion 2 is formed on the multilayer film by vacuum forming or the like by plug molding, air assist plug molding, pressure forming, plug assist pressure forming, etc. to produce the multilayer film molded body 1. .. Next, the projecting molded portion 2 of the multilayer film molded body 1 is filled with the solid agent 102, which is an object to be preserved, and then the cover film 101 is superposed on the multilayer film molded body 1, and the multilayer film molded body 1 and the cover film 101 are overlapped. And glue. Then, if necessary, the slit 10b is formed in the multilayer film molded body 1 and the cover film 101 by using a sewing machine blade, a half-cut blade, or the like. From the above, the package body 10 is obtained.
  • the package 10 of the present embodiment is provided with the multilayer film molded body 1 described above, it is excellent in push-through property (tablet take-out property).
  • the multilayer film molded body 1 shown in FIG. 1 is a molded body of a multilayer film, but the molded body of the present embodiment may be a molded body of a single layer film.
  • the thickness of the central portion of the top wall of the molded body of the single-layer film is the central portion of the side wall or the neck, similarly to the molded body of the multilayer film described above. It is preferably thicker or the same as the thickness of the lower part, and the thickness of the central part of the top wall is thicker than the thickness of the central part of the side wall or the lower part of the neck.
  • the single-layer film molded product of the present embodiment has excellent push-through properties.
  • the thickness can be measured with, for example, a digital indicator (Digimatic Indicator ID-C112 manufactured by Mitutoyo Co., Ltd.).
  • the packaging body 10 shown in FIGS. 4 and 5 is a packaging body including the above-mentioned multilayer film molded body, but the packaging body of the present embodiment may be a packaging body including the above-mentioned single-layer film molded body.
  • a polypropylene resin film manufactured by Sumitomo Bakelite Co., Ltd .; trade name “NS-3450", hereinafter sometimes referred to as PP
  • a film 2 composed of a single layer As a surface, a polyvinyl chloride resin film (manufactured by Sumitomo Bakelite Co., Ltd .; trade name "VSS-F120”, hereinafter sometimes referred to as PVC) was prepared.
  • a polychlorotrifluoroethylene film (manufactured by Honeywell, trade name "Aclar SupRx 900") was prepared.
  • a polyvinyl chloride film (manufactured by Sumitomo Bakelite Co., Ltd .; trade name "VSS-F120”) was prepared.
  • the first film and the second film were dry-laminated in this order to prepare a film 3.
  • the thickness of the first film layer was 23 ⁇ m, and the thickness of the second film layer was 200 ⁇ m.
  • a polyvinyl chloride resin film manufactured by Sumitomo Bakelite Co., Ltd .; VSS-8142 type, hereinafter sometimes referred to as PVC
  • PVC polyvinyl chloride resin film
  • PVDC polyvinylidene chloride latex
  • a urethane-based anchor coating agent was applied to one side of the first film and dried, and then the polyvinylidene chloride latex was applied and dried to prepare a two-layer film of PVC / PVDC.
  • a film 4 composed of five layers of PVC / PVDC / LDPE / PVDC / PVC is produced by extrusion-laminating two layers of PVC / PVDC with each other via low density polyethylene (hereinafter sometimes referred to as LDPE). did.
  • Polypropylene (manufactured by Prime Polymer Co., Ltd .; trade name “E122V”) may be referred to as the first resin
  • high-density polyethylene (manufactured by Prime Polymer Co., Ltd .; trade name "3300F", HDPE) may be referred to as the second resin. There is), respectively.
  • 15% by mass of polymer-modified petroleum resin (“T-REZ OP501” manufactured by Tonen Kagaku Co., Ltd.) is melt-kneaded into each of the first resin and the second resin, and an extruder (SNT Co., Ltd.) is used.
  • the first resin and the second resin are each melted at 250 ° C.
  • polypropylene is finally used as an unstretched first film layer using a feed block. It has a structure in which a layer and a high-density polyethylene layer finally becoming an unstretched second film layer are alternately and repeatedly laminated, and the two outermost layers are both polypropylene layers, and the two layers A five-layer molten laminate (the above-mentioned first laminated film) composed of the polypropylene layer and the three-layer high-density polyethylene layer was produced.
  • the obtained 5-layer molten laminate was cut into two sheets, and these two molten laminates after cutting were further laminated to form a 9-layer molten laminate (the above-mentioned first). 2 laminated films) were produced.
  • the obtained 9-layer molten laminate is stretched and expanded in a direction parallel to the surface thereof, and after this expansion is performed in the same manner as in the case of the 5-layer molten laminate (first laminated film).
  • the 9-layer molten laminate was cut and laminated to prepare a 17-layer molten laminate (the above-mentioned third laminated film).
  • the unstretched first film layer and the unstretched second film layer are alternately and repeatedly laminated.
  • a 2049 barrier layer composed of 1024 layers of the first film layer and 1025 layers of the second film layer was prepared.
  • PP similar to the first resin used for producing the barrier layer was melt-kneaded, and the melted resin was melt-extruded into another feed block by several extruders different from the above to obtain a polypropylene film (No. 1). 1 outer layer) was formed.
  • PP similar to the first resin used for producing the barrier layer was melt-kneaded, and the melted resin was melt-extruded into another feed block by several extruders different from the above to obtain a polypropylene film (No. 1). 2 outer layers) were formed.
  • the first outer layer obtained above is laminated on both sides of the barrier layer of 2049 layers, and the second outer layer obtained above is further laminated on both sides thereof to prepare a molten laminate of 2053 layers.
  • a film 5 which is a multilayer film was produced by co-extruding this molten laminate using a die.
  • the thickness of the obtained film 5 was 300 ⁇ m, of which the thickness of the first outer layer was 20 ⁇ m, the thickness of the second outer layer was 10 ⁇ m, and the thickness of the barrier layer was 240 ⁇ m. That is, the number of layers of the first film layer of the film 5 was 1024, and the average thickness of the first film layer per layer was 94 nm.
  • the number of layers of the second film layer of the film 5 was 1025, and the average thickness of the second film layer per layer was 141 nm.
  • the above thickness was confirmed by cutting the multilayer film using a microtome and observing the cross section of the multilayer film produced by this cutting with an electron microscope.
  • the moisture permeability of the sheet was evaluated by measuring the amount of water vapor permeation of the films 1 to 5 obtained above.
  • the amount of water vapor permeation was measured using a water vapor permeation measuring device (manufactured by MOCON, PERMATRAN-W (registered trademark) 3/33) according to the method described in JIS K7129 (method B) (moisture absorption conditions: 40 ° C./90% RH).
  • Table 1 shows the resins (constituent resins) constituting the films 1 to 5, the number of layers, the total thickness ( ⁇ m), and the moisture permeability of the sheet at 40 ° C./90% RH.
  • Examples 1 to 7, Comparative Examples 1 to 7 A film molded product was produced using the films 1 to 5 obtained above. Specifically, using a blister packaging machine (manufactured by CKD, "FBP-300E"), five protruding molded parts protruding in the thickness direction and two protruding molding parts in the MD direction (total). A film molded body provided with 10) was prepared. The drawing ratio and thickness of the projecting molded portion were changed so that the thickness was as shown in Table 2, and the film molded products of Examples 1 to 7 and Comparative Examples 1 to 7 were used. Manufactured.
  • the aperture ratio of the protruding molded portion was calculated by measuring the diameter and depth of the protruding molded portion with a magnifying projector (PJ-H30 manufactured by Mitutoyo Co., Ltd.).
  • the thickness of the protrusion-forming portion was measured with a digital indicator (Mitutoyo Co., Ltd., Digimatic Indicator ID-C112).
  • the thickness of the central portion of the top wall is thicker than the thickness of the central portion of the side wall and the lower part of the neck. Therefore, as shown in FIG. 2 or 3, when a load is first applied. Since the side wall portion is deformed and then the side wall portion is deformed as it is, the entire protruding molded portion is crushed smoothly, and the maximum compressive load value is lower than that of the film molded products of Comparative Examples 1 to 7. It is presumed that it has become.
  • the maximum compression load value of the film molded product of Example 5 was the highest. This is because the film molded product of Example 5 had a smaller drawing ratio than the film molded products of Examples 6 and 7, and the film was not stretched, so that the average thickness of the film molded product was larger. It is presumed to be derived from.
  • the film molded product of the present embodiment has excellent push-through property of the protruding molded portion.
  • the present invention can be used for packaging used for storage of foods, pharmaceuticals, etc.
  • Multilayer film molded body 11 Barrier layer 111 ... 1st film layer 112 ... 2nd film layer 12 ... 1st outer layer 13 ... 2nd outer layer 2 ... Projection molding Part 21 ... Top wall part 21a ... Top wall center part 22 ... Side wall part 22a ... Side wall center part 22b ... Lower neck 23 ... Corner part 24 ... Plate part 10 ... ⁇ Package 10a ⁇ ⁇ ⁇ Solid agent accommodating part 10b ⁇ ⁇ ⁇ Slit 101 ⁇ ⁇ ⁇ Cover film 101a ⁇ ⁇ ⁇ First surface of cover film 1a ⁇ ⁇ ⁇ One surface in the thickness direction of plate part 1b ⁇ ⁇ ⁇ Plate The other surface in the thickness direction of the part 102 ... Solid agent

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Wrappers (AREA)
  • Packages (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne un corps moulé en film comprenant une partie plaque (24), et une partie moulée saillante (2) qui fait saillie vers une première surface dans la direction de l'épaisseur (1a) de la partie plaque et s'ouvre dans l'autre côté dans la direction de l'épaisseur (1b), le corps moulé en film étant tel que l'épaisseur d'une partie centrale de paroi supérieure (21a) de la partie moulée saillante (2) est supérieure ou égale à l'épaisseur d'une partie centrale de paroi latérale (22a) ou d'une partie inférieure de col (22b) de la partie moulée saillante (2).
PCT/JP2020/013521 2019-03-28 2020-03-26 Corps moulé en film et corps d'emballage WO2020196700A1 (fr)

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Cited By (1)

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JP2023009065A (ja) * 2020-08-05 2023-01-19 三菱ケミカル株式会社 ポリオレフィン系シート、プレススルーパッケージ包装用底材およびプレススルーパッケージ包装材

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JPS4929992Y1 (fr) * 1969-06-09 1974-08-14
JPS5538287A (en) * 1979-04-29 1980-03-17 Hiroi Jidouki Kk Method of filling article
JPH07867U (ja) * 1993-06-07 1995-01-06 三共株式会社 包装体
WO2015186786A1 (fr) * 2014-06-05 2015-12-10 ニプロ株式会社 Feuille ptp destinée à l'emballage de médicaments
JP2016193742A (ja) * 2015-03-31 2016-11-17 大日本印刷株式会社 プレススルーパック包装体
JP2016221760A (ja) * 2015-05-28 2016-12-28 住友ベークライト株式会社 多層フィルム及び包装体

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JPH11198316A (ja) * 1998-01-19 1999-07-27 Sumitomo Bakelite Co Ltd Ｐｐ系ｐｔｐ用シート

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Publication number Priority date Publication date Assignee Title
JPS4929992Y1 (fr) * 1969-06-09 1974-08-14
JPS5538287A (en) * 1979-04-29 1980-03-17 Hiroi Jidouki Kk Method of filling article
JPH07867U (ja) * 1993-06-07 1995-01-06 三共株式会社 包装体
WO2015186786A1 (fr) * 2014-06-05 2015-12-10 ニプロ株式会社 Feuille ptp destinée à l'emballage de médicaments
JP2016193742A (ja) * 2015-03-31 2016-11-17 大日本印刷株式会社 プレススルーパック包装体
JP2016221760A (ja) * 2015-05-28 2016-12-28 住友ベークライト株式会社 多層フィルム及び包装体

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023009065A (ja) * 2020-08-05 2023-01-19 三菱ケミカル株式会社 ポリオレフィン系シート、プレススルーパッケージ包装用底材およびプレススルーパッケージ包装材
JP7327617B2 (ja) 2020-08-05 2023-08-16 三菱ケミカル株式会社 ポリオレフィン系シート、プレススルーパッケージ包装用底材およびプレススルーパッケージ包装材

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