Package equipped with stopper and packaged article

Abstract

To provide a package equipped with a stopper and a packaged article which can improve quality and appearance even when a recycled resin is contained in the stopper.SOLUTION: A package equipped with a stopper includes: a container obtained using a laminate for a packaging material equipped with at least a substrate and a seal layer; and a stopper attached to the container. The stopper is made of a polyolefin resin molded body containing a recycled resin, and the recycled resin is a chemically recycled resin.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a package with a spout and a packaged article.

Background Art

[0002] Packaging materials used for packaging bags and the like are required to have various characteristics depending on the application. Therefore, in order to satisfy such various performances simultaneously, packaging materials are generally composed of a laminate including a base material and a sealant layer. Conventionally, as such a laminate for a packaging material, for example, a laminate film having at least a recycled polyethylene layer and a linear low-density polyethylene layer in this order, and the recycled polyethylene layer contains 20% by mass or more of recycled polyethylene with respect to the total amount constituting the recycled polyethylene layer is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the package described in Patent Document 1 above, a spout (also referred to as a "spout") is not attached. However, when a spout is attached to the package to form a package with a spout, in order to increase the recycling material usage rate, it is conceivable to use recycled polyethylene, which is a recycled material, for the spout that occupies a large mass ratio in the package with a spout.

[0005] However, since the recycled material is polyethylene that has been material recycled, there is a risk that foreign substances such as impurities, gels, and aggregates may appear on the surface of the stopper of the stoppered package. Also, because the recycled material is polyethylene that has been material recycled, the stopper tends to change to a dark color such as yellowing, and such a stopper may not appear to have hygiene. For this reason, it is considered that there is room for improvement in terms of the appearance of the stoppered package. Also, in the stopper, there is a risk that odor components may be generated due to thermal degradation of the material recycled polyethylene. Also, when the stopper is molded, a large amount of foreign substances derived from material recycling are mixed in, which may inhibit the kneading property in the injection screw and increase the amount of carbide in the stopper. Furthermore, if the unmelted material is located at the fitting portion of the cap or the main body portion constituting the stopper, it may induce a fitting failure and cause liquid leakage from the stopper. Furthermore, if large sink marks are generated starting from foreign nuclei when the stopper is molded by injection molding, it may inhibit the weldability of the stopper. For this reason, it is considered that there is room for improvement in terms of the quality of the stoppered package. In particular, since the stopper is the part that comes into contact with the mouth in the case of food use and is also the part that comes into contact with the contents during use in the case of toiletry use, improving the quality is an extremely important issue.

[0006] An object of the present disclosure is to provide a stoppered package and a packaged article that can improve quality and appearance even when a recycled resin is contained in the stopper.

Means for Solving the Problems

[0007] One aspect of the present disclosure is a stoppered package including a container obtained by using a laminate for packaging materials including at least a base material and a seal layer, and a stopper attached to the container, wherein the stopper is made of a polyolefin resin molded body containing a recycled resin, and the recycled resin is a chemical recycled resin. According to the above-mentioned package with a stopper, the stopper is made of a polyolefin resin molded body containing recycled resin, and the recycled resin is a chemical recycled resin. The chemical recycled resin is a recycled resin manufactured by once reducing the molecular weight through a process such as a process of gasifying or oilifying and purifying waste resin into naphtha and then polymerizing it, or a process of depolymerizing it into monomers according to the material properties. Therefore, compared with the material recycled resin, which is a resin obtained by washing, pulverizing, and then heating and melting a resin product such as a used packaging material that has been recovered to make it a raw material again, the chemical recycled resin is less likely to be contaminated with foreign substances such as impurities, gels, and aggregates, and it is less likely for foreign substances such as gels and aggregates to appear on the surface of the stopper. Also, since the recycled material is a chemical recycled resin, it is less likely for the stopper to change to a dark color such as yellowing. Therefore, even if the package with a stopper contains recycled resin in the stopper, its appearance can be improved. In addition, different from the material recycled resin, the chemical recycled resin is not affected by heat treatment such as heating and melting after going through the recycling process, so it is less likely to undergo thermal degradation and less likely to generate odor components. Further, since the stopper is made of a polyolefin resin molded body containing recycled resin and the recycled resin is a chemical recycled resin, foreign substances derived from material recycling are not mixed in during the molding of the stopper, and the kneading property in the injection screw is not inhibited, so it is less likely for carbide to increase in the stopper. Furthermore, when the stopper is composed of a cap and a main body part, unmelted materials will not be located at the fitting parts of the cap and the main body part that make up the stopper, fitting failure is suppressed, and liquid leakage from the stopper is less likely to occur. Moreover, foreign substances derived from material recycling are not mixed in during the molding of the stopper, and it is less likely for large sink marks to occur starting from the nuclei of foreign substances when molding the stopper by injection molding, and it is suppressed that the weldability of the stopper is inhibited. Therefore, even if the package with a stopper contains recycled resin in the stopper, its quality can also be improved.

[0008] The content rate of the chemical recycling resin in the above-mentioned package with a stopper is preferably 10% by mass or more, more preferably 20% by mass or more, still more preferably 25% by mass or more, and particularly preferably 30% by mass or more. When the content rate of the chemical recycling resin in the above-mentioned package with a stopper is 10% by mass or more, the environmental load can be reduced.

[0009] In the above-mentioned package with a stopper, the recycling resin may contain post-consumer recycled resin (PCR). Since a large quantity of PCR can be secured in the market, the cost of the package with a stopper can be reduced. Note that the recycling resin may be a combination of PCR and post-industrial recycled resin (PIR).

[0010] The above-mentioned stopper may be colored.

[0011] In the above-mentioned package with a stopper, the laminate for packaging material may further include a second base material on one side or both sides of the base material. In this case, since the base material is reinforced by the second base material, the strength of the laminate for packaging material can be further improved.

[0012] In the above-mentioned package with a stopper, the laminate for packaging material may further include a gas barrier layer between the base material and the seal layer. In this case, the gas barrier property of the laminate for packaging material is further improved. Therefore, when a container is manufactured using the laminate for packaging material and a stopper is attached, and the content is accommodated in the package with a stopper thus obtained, deterioration of the content due to gases such as oxygen can be effectively suppressed.

[0013] Still another aspect of the present disclosure provides a packaged article including the above-mentioned package with a stopper and the content accommodated in the package with a stopper. The above-described packaged article includes a package with a stopper, and even if the package with a stopper contains a recycled resin, the quality and appearance can be improved. Therefore, even if the stopper contains a recycled resin, the quality and appearance of the packaged article can be improved.

Advantages of the Invention

[0014] According to the present disclosure, there are provided a package with a stopper and a packaged article in which the quality and appearance can be improved even if the stopper contains a recycled resin.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0016] Hereinafter, embodiments of the packaged article of the present disclosure will be described in detail. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and redundant descriptions are omitted. FIG. 1 is a cross-sectional view showing an embodiment of a packaged article according to the present disclosure, and FIGS. 2 and 3 are cross-sectional views showing various embodiments of a laminate for packaging material according to the present disclosure.

[0017] The packaged article 500 shown in FIG. 1 includes a package with a stopper 400 and a content C accommodated in the package with a stopper 400. The package with a stopper 400 includes a container 300 and a stopper 310 attached to the container 300. The stopper 310 is made of a polyolefin resin molded body containing a recycled resin, and the recycled resin is a chemical recycled resin. The container 300 is obtained using a laminate for packaging material (hereinafter also referred to as "laminate") 100. As shown in FIG. 2, the laminate for packaging material 100 includes a base material 10 and a seal layer 30. The laminate 100 may further include a second substrate 20 between the substrate 10 and the seal layer 30. As shown in FIG. 3, the laminate 100 may further include a printing layer 50.

[0018] The above-mentioned packaged article 500 includes a packaged body 400 with a stopper. The packaged body 400 with a stopper can improve the quality and appearance even if it contains recycled resin. Therefore, the packaged article 500 can improve the quality and appearance even if the stopper 400 contains recycled resin.

[0019] Hereinafter, the container 300, the stopper 310, and the content C will be described in detail.

[0020] <<Container>> The container 300 is obtained by using the laminate 100 including the substrate 10 and the seal layer 30. Specifically, as shown in FIG. 1, the container 300 may be a standing pouch. In this case, one of the three laminates 100 is used as the bottom laminate, and the remaining two laminates 100 are used as the front laminate and the back laminate, respectively. Then, the bottom laminate is bent with the seal layer 30 on the outside and inserted between the front laminate and the back laminate, and the peripheral edge is sealed. Note that the container 300 can also be obtained, for example, by bending one laminate 100 and heat-sealing the overlapping edges. Alternatively, the container 300 can be obtained, for example, by overlapping two laminates 100 and heat-sealing the overlapping edges. Further, the container 300 may be a gusset pouch. In this case, two of the four laminates 100 are used as the side laminates, and the remaining two laminates 100 are used as the front laminate and the back laminate, respectively. The two side laminates are bent with the seal layer 30 on the outside, and these two side laminates are inserted between the front laminate and the back laminate, and the peripheral edge is sealed.

[0021] <Substrate> As the base material 10, a film base material made of a resin material can be used. Examples of such resin materials include polyester resins such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), polyolefin resins such as polyethylene and polypropylene, polystyrene, polyamide resins such as 6-nylon and 66-nylon, polycarbonate resin, polyacrylonitrile resin, engineering plastics such as polyimide resin, and the like. As the above resin material, a resin material having mechanical strength and dimensional stability is preferable. The above resin material is processed into a film shape and used as a film base material.

[0022] Polyethylene is a resin containing ethylene as a structural unit. Examples of polyethylene include homopolymers of ethylene and copolymers of ethylene and other monomers. The proportion of ethylene in polyethylene is, for example, 80 mol% or more. Examples of other monomers include α-olefins, vinyl acetate, acrylic esters, and the like. The α-olefin may be an olefin having 3 to 20 carbon atoms. Examples of the α-olefin include propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-eicosene, 3-methyl-1-butene, 4-methyl-1-pentene, or 6-methyl-1-heptene. Examples of polyethylene include high-density polyethylene (HDPE), medium-density polyethylene (MDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), very-low-density polyethylene (VLDPE), ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-methyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene-propylene copolymer, and the like. These may be used alone or in combination of two or more.

[0023] Polypropylene is a resin containing propylene as a constituent unit, and it does not necessarily contain ethylene as a constituent unit. It may be not only a homopolymer of propylene but also a copolymer of propylene with ethylene or various α-olefins. Examples of polypropylene include homopolypropylene, block polypropylene, and random polypropylene.

[0024] The above resin material may be a non-recycled resin (derived from petroleum), a recycled resin, or a mixture thereof. When the above resin material is a recycled resin, since the outer substrate 10 does not come into contact with the content C, as the recycled resin, a resin recycled by material recycling may be used, but it is preferable to use a resin recycled by chemical recycling from the viewpoints of hygiene and quality. The chemically recycled polyolefin resin may be composed of a single chemically recycled polyolefin resin or may be composed of a mixture of multiple types of chemically recycled polyolefin resins.

[0025] Also, the substrate 10 may be a single layer or a multilayer structure. When the substrate 10 has a multilayer structure, the substrate 10 is formed from a layer structure of two or more layers, and at least one of them preferably contains a chemically recycled resin. In addition, the substrate 10 may be a layer formed by co-extruding a multilayer film using an adhesive resin or the like for a layer made of an ethylene-vinyl alcohol copolymer or a layer made of polyamide as needed, and stretching the formed film. For example, a three-component five-layer substrate composed of a chemically recycled resin / adhesive resin / ethylene-vinyl alcohol copolymer / adhesive resin / chemically recycled resin, a three-component three-layer substrate composed of a chemically recycled resin / adhesive resin / ethylene-vinyl alcohol copolymer, a multilayer substrate composed of a petroleum-derived (natural) resin / chemically recycled resin / petroleum-derived (natural) resin, or a multilayer substrate composed of a petroleum-derived (natural) resin / other polyolefin / chemically recycled resin / other resin / petroleum-derived (natural) resin, etc. can be mentioned. In the multilayer substrate 10, the same kind of material may have different specific gravities depending on the function.

[0026] The base material 10 may further contain additives such as a filler, an antistatic agent, a plasticizer, a lubricant, a light-shielding pigment, and an antioxidant, if necessary. When the base material 10 contains a light-shielding pigment, the base material 10 can function as a light-shielding layer.

[0027] The base material 10 may be an unstretched film or a stretched film. The stretched film may be a uniaxially stretched film or a biaxially stretched film. The base material 10 may be composed of either a stretched film or an unstretched film. If the base material 10 is a uniaxially stretched film, it is possible to improve the tearability, heat resistance, etc. of the laminate 100. If the base material 10 is a biaxially stretched film, the mechanical strength and dimensional stability of the laminate 100 can be improved.

[0028] When an adhesive layer is provided on the surface of the base material 10, in order to enhance the adhesiveness with the adhesive layer, various pretreatment such as corona treatment, plasma treatment, ozone treatment, and flame treatment may be performed on the surface on the adhesive layer side, or a coating layer such as an easy-adhesion layer may be provided.

[0029] The thickness of the base material 10 is not particularly limited, and is, for example, 10 μm or more and 100 μm or less. From the viewpoint of obtaining excellent heat resistance, impact resistance, and gas barrier properties, the thickness of the base material 10 may be 15 μm or more, 20 μm or more, 25 μm or more, 30 μm or more, or 40 μm or more. Also, from the viewpoint of material reduction for reducing environmental load, the thickness of the base material 10 may be 60 μm or less, or 50 μm or less.

[0030] <Sealing layer> The sealing layer 30 is bonded to another sealing layer 30 by heating and pressurization when manufacturing the container 300 using the laminate 100. As the sealing layer 30, a sealant film can be used.

[0031] The seal layer 30 preferably has a melting point lower than that of the base material 10 disposed on the outside. In this case, when heat-sealing the laminate 100, it becomes possible to thermally fuse the seal layer 30 while suppressing the melting of the base material 10. Further, by heating the laminate 100, the base material 10 and the seal layer 30 can be easily separated, and material recycling can be easily performed for each of the base material 10 and the seal layer 30.

[0032] The seal layer 30 may further contain additives such as a flame retardant, a slip agent, an antiblocking agent, an antioxidant, a light stabilizer, a tackifier, an antistatic agent, and a light-shielding pigment, as necessary. When the seal layer 30 contains a light-shielding pigment, the seal layer 30 can function as a light-shielding layer.

[0033] The seal layer 30 may be a single layer or composed of a plurality of layers. When the seal layer 30 is composed of a single layer, the seal layer 30 may be a recycled polyolefin resin film or a non-recycled polyolefin resin film. As the recycled polyolefin resin film, a film containing a chemically recycled polyolefin resin is preferable because it is excellent in terms of hygiene and quality. When the plurality of layers of the seal layer 30 is three layers, the plurality of layers may be composed of a first outer layer, an intermediate layer, and a second outer layer. Here, the first outer layer and the second outer layer may be made of a non-recycled polyolefin resin film, and the intermediate layer may be made of a recycled polyolefin resin film. Further, the seal layer 30 may be colored white or the like. For example, a white sealant containing a titanium oxide-based white pigment can be used. Note that the seal layer 30 is not limited to a white sealant, and may be composed of a seal layer of another color by containing a pigment other than the white pigment.

[0034] As the sealant film, a polyolefin resin film, a polyester resin film, or the like can be used. The polyolefin resin film can be preferably used in terms of proper sealing and the like, and contains a resin made of a polyolefin resin. As the polyolefin resin, the same one as the polyolefin resin used for the base material 10 can be used. The polyester resin film can use a copolyester obtained by copolymerizing various copolymers, and such a sealant film is preferable in terms of low adsorbability of the content components and flavor barrier.

[0035] The thickness of the sealant layer 30 is not particularly limited and can be appropriately adjusted according to the use of the laminate 100 and the like. The thickness of the sealant layer 30 may be, for example, 10 μm or more, 25 μm or more, 30 μm or more, 40 μm or more, or 50 μm or more. Also, the thickness of the sealant layer 30 may be 200 μm or less, 150 μm or less, 100 μm or less, 80 μm or less, 60 μm or less, or 50 μm or less.

[0036] <Second base material> The second base material 20 is a base material that reinforces the base material 10 and can further improve the strength of the laminate 100. As shown in FIGS. 2 and 3, the second base material 20 may be provided inside the base material 10 (on the sealant layer 30 side) or outside (on the side opposite to the sealant layer 30). Also, the second base material 20 may be provided on both sides of the base material 10. As the second base material 20, a film base material made of a resin material can be used. Examples of such resin materials include polyester resins such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), polyolefin resins such as polyethylene, polypropylene, cyclic olefin copolymer (COC), and cyclic olefin polymer (COP), polystyrene, polyamide resins such as 66-nylon, polycarbonate resins, polyacrylonitrile resins, and engineering plastics such as polyimide resins. As the above resin materials, resin materials having mechanical strength and dimensional stability are preferable. The above resin material is processed into a film shape and used as a film substrate. The film substrate may be an unstretched film or a stretched film.

[0037] The second substrate 20 may be a single layer or a laminate of multiple layers. When the second substrate 20 is composed of a single layer, the second substrate 20 may be a recycled resin film, or a non-recycled resin film such as a petroleum-derived resin or a biomass-derived resin. When the second substrate 20 is composed of multiple layers, all the layers may be recycled resin films, or non-recycled resin films, or some layers may be non-recycled resin films and the remaining layers may be recycled resin films. When the multiple layers are three layers, the multiple layers may be composed of a first outer layer, an intermediate layer, and a second outer layer. Here, the first outer layer and the second outer layer may be made of a non-recycled resin film, and the intermediate layer may be made of a recycled resin film. In this case, during the retort treatment or boiling treatment of the package with a stopper, the possibility of foreign substances such as impurities, gels, and aggregates migrating from the second substrate 20 through the seal layer 30 into the contents due to heating can be further reduced. Therefore, the laminate 100 can be safely used for packaging contents such as food. Further, the second substrate 20 may be a co-extruded resin film of polypropylene (PP) and ethylene vinyl alcohol resin (EVOH) (PP / EVOH), a co-extruded resin film of polyethylene and EVOH (PE / EVOH), or a co-extruded resin film of multiple layers and EVOH. Here, examples of the multiple layers include a three-layer polypropylene layer (PP / PP / PP).

[0038] The thickness of the second substrate 20 is not particularly limited and is appropriately adjusted according to the use of the package 400 with a stopper. The thickness of the second substrate 20 may be, for example, 10 μm or more, 25 μm or more, 30 μm or more, 40 μm or more, or 50 μm or more. Also, the thickness of the second substrate 20 may be 100 μm or less, 80 μm or less, 60 μm or less, or 50 μm or less.

[0039] <Adhesive layer> Examples of the adhesive layer include an adhesive layer formed using an adhesive, and an adhesive layer containing an adhesive resin (hereinafter also referred to as "adhesive resin layer").

[0040] Examples of the adhesive include known adhesives such as urethane adhesives, polyester adhesives, polyamide adhesives, epoxy adhesives, and isocyanate adhesives.

[0041] Also, the adhesive may or may not contain biomass-derived components, but from the viewpoint of reducing environmental impact, it preferably contains biomass-derived components. Specific examples of the biomass-derived components include "Dick Dry BM series" manufactured by DIC Corporation and "ECOAD series" manufactured by Toyo Ink Co., Ltd.

[0042] The adhesive may be an adhesive containing an organic solvent or an adhesive not containing an organic solvent, but from the viewpoint of reducing environmental impact, it is preferably an adhesive not containing an organic solvent (solventless adhesive).

[0043] The adhesive resin layer may be an extruded resin layer or a non-extruded resin layer. The adhesive resin is an adhesive thermoplastic resin that can be heat-sealed, and any resin can be used as long as it can be melted by heat and fused with each other. For example, low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear (linear) low-density polyethylene, polypropylene, ethylene-propylene copolymer, methylpentene polymer, polyolefin resins such as polyethylene or polypropylene, etc. are modified with unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, and other resins such as acid-modified polyolefin resins can be used.

[0044] The thickness of the adhesive layer is not particularly limited, and may be, for example, 1 μm or more. By setting the thickness of the adhesive layer to 1 μm or more, sufficient adhesive strength can be obtained. The thickness of the adhesive layer may also be 2 μm or more. The thickness of the subsequent layer may be 50 μm or less, may be 5 μm or less, or may be 3 μm or less.

[0045] <Printing layer> The printing layer 50 can be provided on one or both surfaces of the base material 10, the second base material 20, or the outer sealant layer 40. When the printing layer 50 is provided between the layers of the laminate 100, the printing layer 50 is protected by the base material 10, the second base material 20, or the outer sealant layer 40, so that deterioration of the printing layer 50 can be prevented. When the printing layer 50 becomes the outermost surface of the laminate 100 on the side opposite to the seal layer 30, the printing layer 50 can be easily removed when recycling is performed after discarding the container 300 including the laminate 100. The printing layer 50 is a layer for displaying characters, patterns, etc., and can be formed using ink. As the ink, for example, ink obtained by adding various pigments, plasticizers, drying agents, stabilizers, etc. to a binder resin such as urethane-based, acrylic-based, nitrocellulose-based, or rubber-based can be used.

[0046] The ink may be water-based ink or oil-based ink, but water-based ink is preferred. Since water-based ink uses water or alcohol as a solvent, the environmental load can be further reduced. In particular, when the adhesive is a solventless adhesive, using water-based ink as the ink can significantly reduce the environmental load. Also, the ink may or may not be biomass ink, but from the viewpoint of reducing the environmental load, it is preferably biomass ink. Here, biomass ink refers to ink containing components obtained from biological resources (biomass) such as cotton, pulp, rice bran, vegetable oil, and seeds of angiosperms. Also, the ink may be recycled ink obtained by recovering and recycling used ink or non-recycled ink, but from the viewpoint of environmental load, it is preferably recycled ink. Furthermore, easily recyclable ink can also be used. By using easily recyclable ink, it becomes possible to easily recycle the packaging after disposal. Specific examples of easily recyclable ink include "SunSpectro Solvawash" manufactured by DIC Corporation.

[0047] <Gas barrier layer> As shown in FIG. 3, the laminate 100 may include a gas barrier layer 60 together with the printing layer 50. The gas barrier layer 60 may be provided on at least one surface of the base material 10. Further, when the laminate 100 includes the second base material 20, as shown in FIG. 3, the gas barrier layer 60 may be provided on at least one surface of the second base material 20. The gas barrier layer 60 is a layer that improves the gas barrier property of the laminate 100. The gas barrier layer 60 has a barrier property against gases such as water vapor or oxygen, for example.

[0048] As the gas barrier layer 60, for example, a vapor deposition layer such as a vapor deposition layer of a metal or a vapor deposition layer of an inorganic compound can be used. Examples of the metal include aluminum and silicon. Examples of the inorganic oxide include aluminum oxide and silicon oxide (silica). When the gas barrier layer 60 is a vapor deposition layer of a metal such as aluminum, the gas barrier layer 60 can function as a light-shielding layer. The gas barrier layer 60 may further include an overcoat layer on the vapor deposition layer. As the overcoat layer, a coat layer obtained by using a composition containing a water-soluble polymer and a silicon alkoxide or a coat layer made of a resin such as polyurethane can be used.

[0049] <Others> The laminate 100 may further include a layer containing a non-polyolefin resin. Examples of the non-polyolefin resin include polyamide resins such as nylon and polyester resins such as polyethylene terephthalate (PET).

[0050] When the container 300 is formed using a plurality of laminate bodies 100, the plurality of laminate bodies 100 may have the same configuration as each other, or may have different configurations from each other.

[0051] The container 300 may be provided with a half-cut line, and may further be provided with an easy-open processing portion at both ends or one end of the half-cut line. Examples of the easy-open processing portion include a scar group, notches such as V-shaped, U-shaped, or I-shaped.

[0052] In the adhesion portion of the container 300, the seal layers 30 of the laminate body 100 may be directly adhered to each other by heat sealing, or may be adhered to each other by an adhesive.

[0053] <<Plug>> The plug 310 is made of a polyolefin resin molded body containing a recycled resin, and the recycled resin is a chemical recycled resin. The content rate of the recycled resin in the plug 310 is not particularly limited, but is, for example, 10% by mass or more, 20% by mass or more, or 50% by mass or more. The content rate of the recycled resin in the plug 310 may be 100% by mass or less, 80% by mass or less, or 50% by mass or less. The plug 310 may be attached at any position of the container 300. The plug 310 is attached so as to cross the peripheral edge portion of the container 300. For example, the plug 310 may be attached to the central portion of the side or the end portion of the side of the container 300. A part of the plug 310 is sandwiched between the edge portions of the laminate bodies 100 facing each other. The plug 310 usually includes a main body portion 310b that allows the content C to pass through. The plug 310 may further include a cap portion 310a that stops the discharge of the content C from the main body portion 310b. The main body portion 310b may include, for example, a cap mounting portion to which the cap 310a is attached, a welding portion to which the laminate 100 is welded and which has a through hole, and a package insertion portion that is inserted into the packaged body 400 with a stopper, in this order along a certain direction. Here, the outer peripheral surface of the cap mounting portion may form a screw fitting portion. In this case, the cap has a screw fitting portion on its inner peripheral surface. An inner ring for closing the opening of the cap mounting portion may be further provided on the bottom surface of the cap. Further, the package insertion portion may be a rod-shaped member having an opening communicating with the through hole of the welding portion. The package insertion portion may have a configuration in which a plurality of plate-shaped members are provided on the outer peripheral surface of the rod-shaped member. In this case, the space between the plurality of plate-shaped members has a function of guiding the content C to the through hole of the welding portion.

[0054] <<Content>> The content C is not particularly limited and may be appropriately selected according to the use of the packaged body 400 with a stopper. The content C is not particularly limited, and examples of the content C include foods, shampoos, rinses, body soaps, detergents, and the like.

[0055] (A) Content rate of recycled resin In the packaged body 400 with a stopper, the content rate of the recycled resin is preferably 10% by mass or more. In addition, when the stopper 310, the base material 10, the second base material 20, the seal layer 30, and the other layers containing the recycled resin are mixtures of the recycled resin and non-recycled resins such as petroleum-derived resins or biomass-derived resins, the mass of the recycled resin in each of the stopper 310, the base material 10, the second base material 20, the seal layer 30, and the other layers is calculated according to the mass ratio, and the content rate (mass%) of the recycled resin in the packaged body 400 with a stopper is calculated.

[0056] In the present disclosure, the above-mentioned recycled resin is a chemical recycled resin and does not include a material recycled resin. The chemical recycling resin may be a post-consumer recycled resin (PCR), a post-industrial recycled resin (PIR), or a mixture thereof, but preferably contains PCR. Since a large quantity can be secured in the market, if the chemical recycling resin is PCR, the cost of the package 400 with a stopper can be reduced.

[0057] (B) Odor components Regarding the stopper 310 of the package 400 with a stopper, in the total ion chromatogram obtained by performing mass spectrometry using purge and trap gas chromatography-mass spectrometry, the ratio of the peak area of nonanal as an index of odor components to the total of the peak area values of all aliphatic hydrocarbon components is defined as R1 (%), and the ratio of the peak area of decanal to the total of the peak area values of all aliphatic hydrocarbon components is defined as R2 (%). When this is the case, R1 is preferably less than 1.5%, more preferably 1.0% or less, and particularly preferably 0.5% or less. Also, R2 is preferably less than 3.5%, more preferably 2.5% or less, and particularly preferably 1.5% or less. It is preferable that R1 is less than 1.5% and R2 is less than 3.5%. In this case, thermal degradation of the package 400 with a stopper is suppressed as a whole, and the quality of the package 400 with a stopper can be further improved. Specifically, for the above mass spectrometry, 1.0 gram of a sample is cut out from the stopper 310 of the package 400 with a stopper, this sample is put into a 20 mL vial together with a trap for odor components, heated at 60 °C for 1 hour to adsorb the volatile components from the sample to the trap, and the volatile components in the trap are analyzed using a purge and trap gas chromatography-mass spectrometer.

[0058] <Method for manufacturing a packaged article> Next, an example of a method for manufacturing a packaged article 500 using the laminate 100 will be described.

[0059] First, prepare three laminates 100. Use one laminate 100 as the bottom laminate, and use the remaining two laminates 100 as the front laminate and the back laminate. Then, fold the bottom laminate with the seal layer 30 on the outside and sandwich it between the front laminate and the back laminate. Then, heat-seal while leaving a part of the peripheral edges of the front laminate and the back laminate as non-bonded parts.

[0060] On the other hand, prepare a stopper 310. Then, sandwich the main body part 310b of the stopper 310 with a part (non-bonded part) of the peripheral edges of the front laminate and the back laminate, and bond the non-bonded parts of the front laminate and the back laminate to each other by heat-sealing. In this way, a packaged article 400 with a stopper is obtained.

[0061] Next, when the stopper 310 has a main body part 310b and a cap 310a, remove the cap 310a from the main body part 310b and fill the content C through the main body part 310b. In this way, a packaged article 500 including the packaged article 400 with a stopper and the content C can be manufactured.

[0062] As described above, the preferred embodiments of the present disclosure have been described, but the present disclosure is not limited to the above embodiments. For example, in the packaged article 500 shown in FIG. 1, the container 300 may be a two-way bag, a three-way bag, a four-way bag, or a clasp bag. The container 300 may be provided with a synthetic resin fastener that can be repeatedly sealed by fitting a belt-shaped protrusion and a belt-shaped groove.

[0063] The outline of the present disclosure is as follows. [1] A packaged article with a stopper, comprising a container body container composed of a packaging material laminate including at least a base material and a seal layer, and a stopper attached to the container body container, wherein the stopper is made of a polyolefin resin molded film containing a recycled resin, and the recycled resin is a chemical recycled resin. [2] The package with a stopper according to [1], wherein the content rate of the chemical recycling resin in the package with a stopper is 10% by mass or more. [3] The package with a stopper according to [2], wherein the content rate of the chemical recycling resin in the package with a stopper is 20% by mass or more. [4] The package with a stopper according to any one of [1] to [3], wherein the recycling resin contains a post-consumer recycling resin. [5] The package with a stopper according to any one of [1] to [4], wherein the stopper is colored. [6] The package with a stopper according to any one of [1] to [5], wherein the laminate for the packaging material further includes a second substrate on one side or both sides of the substrate. [7] The package with a stopper according to any one of [1] to [6], wherein the laminate for the packaging material further includes a gas barrier layer between the substrate and the seal layer. [8] A packaged article comprising the package with a stopper according to any one of [1] to [7], and the content accommodated in the package with a stopper.

Examples

[0064] The present disclosure will be described more specifically by the following examples, but the present disclosure is not limited to these examples.

[0065] (Example 1) As a substrate, a biaxially oriented PET film (thickness 18 μm) derived from petroleum was prepared. Also, as a second substrate, a biaxially oriented PET film (thickness 18 μm) derived from petroleum was prepared. After forming an AL vapor deposition film (thickness 10 nm) on the surface of the second substrate, an overcoat layer (thickness 300 nm) was formed using a resin composition containing polyvinyl alcohol (PVA) and silicon alkoxide to obtain a structure. Also, as a sealant film which is a seal layer, a linear low-density polyethylene (LLDPE) film (thickness 50 μm) derived from petroleum was prepared. Then, an adhesive for dry lamination (urethane-based adhesive) was applied to the surface of the base material to form an adhesive layer with a thickness of 3 μm (dry film thickness), and the second base material of the structure was bonded to this adhesive layer. Subsequently, an adhesive for dry lamination (urethane-based adhesive) was applied onto the overcoat layer of the structure to form an adhesive layer with a thickness of 3 μm (dry film thickness), and a sealant film, which is a seal layer, was bonded to this adhesive layer to produce a laminate for packaging materials (base material / adhesive layer / second base material / vapor deposition layer / overcoat layer / adhesive layer / seal layer). From the above laminate for packaging materials, a rectangular surface laminate and a back laminate with dimensions of 9 cm × 16 cm, and a rectangular bottom laminate with dimensions of 2.7 cm × 9 cm were prepared. On the other hand, using a used packaging material, a resin molded body made of chemically recycled high-density polyethylene (PCR Chem R100%-HDPE) was prepared, and this resin molded body was used as a stopper. The resin molded body is composed of a main body part and a cap. The main body part has an outer diameter of 20 mm and a length of 80 cm, and includes a cap mounting part where the cap is mounted, a welding part (boat-shaped part) where the surface laminate and the back laminate are welded, and a packaging body insertion part that is inserted into the packaging body, in this order along the longitudinal direction. At this time, the outer peripheral surface of the cap mounting part was formed to have a screw fitting part. The cap was configured such that an inner ring was formed on its bottom surface and a screw fitting part was formed on its inner peripheral surface. Note that "PCR Chem R100%-HDPE" means that the content of post-consumer chemical recycled resin (PCR Chem R) in the stopper is 100% by mass. Then, with the bottom laminate bent in half, it was sandwiched between the lower ends of the surface laminate and the back laminate, and the stopper was sandwiched between the upper ends of the surface laminate and the back laminate. Then, heat sealing was performed on the peripheral edges of the surface laminate and the back laminate using a heat sealing bar. Thus, a packaged body with a stopper was obtained. The stopper was attached so as to protrude 3 cm from the laminate for packaging materials. In the obtained packaged body with a stopper, the content of the chemically recycled resin was 40.0% by mass, and the content of the chemically recycled resin in the stopper was 100% by mass.

[0066] (Example 2) A laminate for packaging (substrate / adhesive layer / second substrate / vapor deposition layer / overcoat layer / adhesive layer / seal layer) was produced in the same manner as in Example 1, except that the substrate and the second substrate were changed from a biaxially stretched PET film derived from petroleum (thickness: 18 μm) to a low-density polyethylene film derived from petroleum (thickness: 20 μm). Then, from the above laminate for packaging, a rectangular front laminate and a rear laminate having dimensions of 9 cm × 16 cm, and a rectangular bottom laminate having dimensions of 2.7 cm × 9 cm were prepared. On the other hand, a stopper was prepared in the same manner as in Example 1. Then, with the bottom laminate folded in half, it was sandwiched between the lower ends of the front laminate and the rear laminate, and the stopper was sandwiched between the upper ends of the front laminate and the rear laminate. Then, heat sealing was performed on the peripheral edges of the front laminate and the rear laminate. Thus, a packaged body with a stopper was obtained. In the obtained packaged body with a stopper, the content of the chemical recycling resin was 42.3% by mass, and the content of the chemical recycling resin in the stopper was 100% by mass.

[0067] (Comparative Example 1) A packaged body with a stopper was produced in the same manner as in Example 1, except that the stopper was changed from PCR Chem R100%-HDPE to PCR material R100%-HDPE. In the obtained packaged body with a stopper, the content of the chemical recycling resin was 0% by mass, and the content of the chemical recycling resin in the stopper was 0% by mass.

[0068] (Reference Example 1) A packaged body with a stopper was produced in the same manner as in Example 1, except that the stopper was changed from PCR Chem R100%-HDPE to petroleum-derived HDPE. In the obtained packaged body with a stopper, the content of the chemical recycling resin was 0% by mass, and the content of the chemical recycling resin in the stopper was 0% by mass.

[0069] (Evaluation) Regarding the packages with stoppers of the Examples, Comparative Examples, and Reference Examples prepared as described above, the following evaluations were conducted: Evaluation 1 (generation of odor components), Evaluation 2 (opening torque), Evaluation 3 (liquid leakage), Evaluation 4 (weldability), and Evaluation 5 (foreign matter). Here, Evaluations 1 to 4 are evaluations related to quality, and Evaluation 5 is an evaluation related to appearance.

[0070] (1) Evaluation 1 (generation of odor components) First, regarding the stopper of the package with a stopper, analysis was performed using purge-and-trap gas chromatography-mass spectrometry. Specifically, 1.0 gram of a sample was cut out from the package with a stopper, and this sample was placed in a 20 mL vial together with an odor component trap, and heated at 60 °C for 1 hour to adsorb the volatile components from the sample onto the trap. Regarding the volatile components in the trap, analysis was performed using a purge-and-trap gas chromatography-mass spectrometer to obtain a total ion chromatogram. Next, in the total ion chromatogram obtained as described above, the ratio R1 of the peak area of nonanal as an index of odor components to the total peak area value of all aliphatic hydrocarbon components, and the ratio R2 of the peak area of decanal to the total peak area value of all aliphatic hydrocarbon components were determined. Then, evaluation was performed based on the following evaluation criteria. The results are shown in Table 1. (Evaluation criteria) ◎ ··· R1 is less than 1.5% and R2 is less than 0.35% ○ ··· R1 is less than 1.5% and R2 is 0.35% or more, or R1 is 1.5% or more and R2 is less than 0.35% × ··· R1 is 1.5% or more and R2 is 0.35% or more

[0071] (2) Evaluation 2 (opening torque) The stopper (cap and main body) of the packaged product with a stopper was tightened by an automatic winding machine at an arbitrary winding speed and winding torque. Then, after leaving it for 3 days until the fitting between the cap and the main body became familiar, with the main body fixed, the cap was manually turned and opened with a torque measuring machine, and the peak torque (unit: N·cm) at that time was measured as the opening torque. Then, evaluation criteria corresponding to the measured opening torque values were determined as follows, and the fitting state of the stopper was evaluated based on these evaluation criteria. The results are shown in Table 2. Note that "〇" indicates that the fitting state of the stopper is good, and "×" indicates that the fitting state of the stopper is not good. (Evaluation Criteria) 〇···The opening torque value is 10 N·cm or more and less than 30 N·cm ×···The opening torque value is 30 N·cm or more

[0072] (3) Evaluation 3 (Liquid Leakage) The stopper (cap and main body) of the packaged product with a stopper was tightened by an automatic winding machine at an arbitrary winding speed and winding torque. Then, the bottom of the package was cut off, a commercially available micro-check penetrant (red oil component) was injected from the package insertion part of the main body of the stopper, and after leaving it at room temperature for 24 hours, the cap was turned and opened. Then, based on the following evaluation criteria, the liquid leakage in the stopper was evaluated. The results are shown in Table 2. Note that "〇" indicates that no liquid leakage has occurred, and "×" indicates that liquid leakage has occurred. (Evaluation Criteria) 〇···Only the inside of the inner ring of the cap is colored red ×···The inside and outside of the inner ring of the cap are colored red

[0073] (4) Evaluation 4 (Weldability) From the package with a stopper, a sample with a width of 15 mm including the entire stopper was cut out along the longitudinal direction of the front laminate and the back laminate, and while fixing the stopper with a tensile testing machine, the two laminates were pulled at an arbitrary speed while sandwiching the stopper to peel the laminate from the stopper, and the peak strength at which the laminate broke was measured as the tensile strength. Then, evaluation criteria corresponding to the measured tensile strength were determined, and based on this evaluation criteria, the weldability of the laminate to the stopper was evaluated. The results are shown in Table 2. Note that "〇" indicates good weldability, and "×" indicates poor weldability. (Evaluation Criteria) 〇 ··· Tensile strength is 50 N / 15 mm or more × ··· Tensile strength is less than 50 N / 15 mm

[0074] (5) Evaluation 5 (Foreign Matter) Regarding the stopper of the package with a stopper, inspection light was irradiated on the outer and inner surfaces of the stopper with an appearance inspection machine, the reflected light from the surface was detected with a camera, the image obtained at that time was binarized, and it was examined whether there was a colored foreign matter with a diameter of 0.3 mm or more. At this time, the inside of the stopper was defined as the portion within the range where the inspection light reached. Then, for the stopper in which one or more colored foreign matters with a diameter of 0.3 mm or more were detected, it was marked as "×", and for the stopper in which no colored foreign matter with a diameter of 0.3 mm or more was detected, it was marked as "〇". The results are shown in Table 2.

[0075] [Table 1] [Table 2]

[0076] From the results shown in Table 2, regarding Evaluation 1, in the package with a stopper of the example using a chemical recycling resin as the recycling resin of the stopper, compared with the package with a stopper of Comparative Example 1 using a material recycling resin as the recycling resin of the stopper, the generation of odor components was less. Regarding Evaluation 2, in all of Example 1, Example 2, and Reference Example 1, the opening torque was moderately small, and the fitting state between the cap and the cap mounting portion of the main body was good. On the other hand, in Comparative Example 1, the opening torque was large, and it could not be said that the fitting state between the cap and the cap mounting portion of the main body was good. This result is presumably due to the following reasons. That is, in Comparative Example 1, protrusions caused by foreign matter derived from the material recycled resin were formed on the screw fitting portions of the inner peripheral surface of the cap and the outer peripheral surface of the cap mounting portion of the main body. Therefore, it is considered that the rotation of the cap was inhibited during opening, and the opening torque showed a large value. In contrast, in Example 1, Example 2, and Reference Example 1, since the foreign matter derived from the material recycled resin was not included in the stopper, no protrusions caused by the foreign matter derived from the material recycled resin were formed on the screw fitting portions of the inner peripheral surface of the cap and the outer peripheral surface of the cap mounting portion of the main body. Thus, it is considered that the rotation of the cap was not inhibited by the protrusions during opening, and the opening torque showed an appropriate value. Regarding Evaluation 3, in all of Example 1, Example 2, and Reference Example 1, no liquid leakage occurred, while in Comparative Example 1, liquid leakage occurred. This result is presumably due to the following reasons. That is, in Comparative Example 1, slight gaps were generated between the screw fitting portion of the inner peripheral surface of the cap and the screw fitting portion of the cap mounting portion due to protrusions caused by foreign matter derived from the material recycled resin on the cap mounting portion of the main body of the stopper and the inner ring portion of the cap. Therefore, it is considered that liquid leakage occurred. In contrast, in Example 1, Example 2, and Reference Example 1, since the foreign matter derived from the material recycled resin was not included in the stopper, no protrusions caused by the foreign matter derived from the material recycled resin were formed on the cap mounting portion of the main body and the inner ring portion of the cap. Thus, it is considered that no gaps were generated between the screw fitting portion of the inner peripheral surface of the cap and the screw fitting portion of the cap mounting portion, and therefore no liquid leakage occurred. Regarding Evaluation 4, the weldability of the stopper to the front laminate and the back laminate was good in all of Example 1, Example 2, and Reference Example 1, but was not good in Comparative Example 1. This result is presumably due to the following reason. That is, in Comparative Example 1, foreign matter derived from the material recycling resin was present on the surface of the welded part, and poor adhesion occurred at the foreign matter part during heat welding with the seal layer of the laminate. Therefore, when measuring the tensile strength of the laminate, it is considered that the laminate peeled off starting from the foreign matter or the laminate suddenly broke, resulting in a low measured tensile strength value. On the other hand, in Example 1, Example 2, and Reference Example 1, since the stopper does not contain foreign matter derived from the material recycling resin, it is considered that the tensile strength of the laminate could be measured until the laminate naturally broke and was measured as a high value. Regarding Evaluation 5, in the packaged body with a stopper of the example using a chemical recycling resin as the recycling resin of the stopper, no foreign matter was observed and the appearance was good as compared with the packaged body with a stopper of Comparative Example 1 using a material recycling resin as the recycling resin of the stopper.

[0077] From the above, it was confirmed that according to the packaged body with a stopper of the present disclosure, even if the stopper contains a recycling resin, the quality and appearance can be improved.

Description of Reference Numerals

[0078] 10... base material, 20... second base material, 30... seal layer, 40... outer sealant layer, 50... printing layer, 60... gas barrier layer, 100... laminate for packaging material, 300... container, 310... stopper, 400... packaged body with a stopper, 500... packaged article, C... content.

Claims

1. A packaged article with a stopper, comprising a container obtained by using a laminate for packaging materials having at least a base material and a seal layer, and a stopper attached to the container, wherein the stopper is made of a polyolefin resin molded article containing a recycled resin, and the recycled resin is a chemical recycled resin. The packaged article with a stopper.

2. The packaged article with a stopper according to Claim 1, wherein the content rate of the chemical recycled resin in the packaged article with a stopper is 10% by mass or more.

3. The packaged article with a stopper according to Claim 2, wherein the content rate of the chemical recycled resin in the packaged article with a stopper is 20% by mass or more.

4. The packaged article with a stopper according to Claim 1, wherein the recycled resin contains a post-consumer recycled resin.

5. The packaged article with a stopper according to Claim 1, wherein the stopper is colored.

6. The packaged article with a stopper according to Claim 1, wherein the laminate for packaging materials further comprises a second base material on one side or both sides of the base material.

7. The packaged article with a stopper according to Claim 1, wherein the laminate for packaging materials further comprises a gas barrier layer between the base material and the seal layer.

8. A packaged article, comprising the packaged article with a stopper according to any one of Claims 1 to 7, and a content accommodated in the packaged article with a stopper.

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