Packaging bag with zipper and packaging article

Abstract

To provide a packaging bag with a zipper and a packaging article which can improve appearance, hygiene and sealing performance of a content even if a recycled resin is contained in a zipper mechanism.SOLUTION: A packaging bag with a zipper includes: a packaging bag obtained by using a front surface member and a back surface member opposed to each other; and a zipper mechanism provided between the front surface member and the back surface member. The zipper mechanism is formed of a female fitting member and a male fitting member. The front surface member and the back surface member are composed of a packaging laminate having at least a base material and a seal layer. The zipper mechanism is composed of a polyolefin resin molded body containing a recycled resin, the recycled resin being a chemically recycled resin.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a bag with a chuck and a packaged article.

Background Art

[0002] Packaging materials used for bags and the like are required to have various characteristics depending on the application. Therefore, in order to satisfy such various performances at the same time, the packaging material is generally composed of a laminate including an outer layer base material and a sealant layer. As such a laminate for a packaging material, conventionally, for example, at least a recycled polyethylene layer and a linear low-density polyethylene layer are provided in this order, and the recycled polyethylene layer contains 20% by mass or more of recycled polyethylene in the total amount constituting the recycled polyethylene layer. A packaged body provided with a laminated film is known (see Patent Document 1 below).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the packaged body described in Patent Document 1 above, a chuck mechanism composed of a female fitting member and a male fitting member is not attached. However, when a chuck is attached to the packaged body to form a bag with a chuck, in order to increase the usage rate of recycled materials, it is conceivable to use recycled polyethylene, which is a recycled material, for the chuck mechanism. 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 chuck mechanism in the chuck mechanism of the package with a chuck. For this reason, there is room for improvement in terms of the appearance of the package with a chuck. Also, in the chuck mechanism of the package with a chuck, odor components may be generated and impurities are also included, so there is room for improvement in terms of hygiene for the package with a chuck. In particular, since the chuck mechanism is the part that comes into contact with the contents when taking out the contents, it is desirable that the generation of odor components and impurities in the chuck mechanism be minimal from the perspective of hygiene. Furthermore, since the surface condition of the chuck mechanism is poor due to impurities and the like, the female fitting member and the male fitting member constituting the chuck mechanism may not fit well, or may separate after fitting, and there is room for improvement in terms of the sealing performance of the contents in the package.

[0005] An object of the present disclosure is to provide a bag with a chuck and a packaged article that can improve appearance, hygiene, and the sealing performance of the contents even when a recycled resin is contained in the chuck mechanism.

Means for Solving the Problems

[0006] One aspect of the present disclosure provides a bag with a chuck comprising a front surface member and a back surface member facing each other, and a chuck mechanism provided between the front surface member and the back surface member, the chuck mechanism being composed of a female fitting member and a male fitting member, wherein the front surface member and the back surface member are composed of a laminate for packaging materials including at least a base material and a seal layer, the chuck mechanism is composed of a polyolefin resin molded body containing a recycled resin, and the recycled resin is a chemical recycled resin. According to the above-mentioned bag with a chuck, the chuck mechanism is made of a polyolefin resin molded body containing a recycled resin, and the recycled resin is a chemical recycled resin. The chemical recycled resin is a recycled resin manufactured by polymerizing after once being depolymerized through a process such as a process of monomerizing via naphtha obtained by once gasifying or oilifying and purifying the discarded resin, or a process of monomerizing by depolymerization according to the material properties. Therefore, compared with the material recycled resin which is a resin obtained by washing, pulverizing a resin product such as a recovered used packaging material and then heating and melting it to reconstitute it into a raw material, 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 chuck mechanism. For this reason, even if the bag with a chuck contains a recycled resin in the chuck mechanism, the appearance can be improved. In addition, the chuck mechanism, which is the part that comes into contact with the contents when taking out the contents, can also improve the hygiene. Furthermore, since the deterioration of the surface state due to impurities and the like is suppressed in the chuck mechanism, the female fitting member and the male fitting member constituting the chuck mechanism can be properly fitted, and the sealing performance of the contents can be improved.

[0007] The content rate of the chemical recycled resin in the above-mentioned bag with a chuck 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 recycled resin in the above-mentioned bag with a chuck is 10% by mass or more, the environmental load can be reduced.

[0008] In the above-mentioned bag with a chuck, the recycled resin may contain post-consumer recycled resin (PCR). Since a large quantity of PCR can be secured in the market, the cost of the bag with a chuck can be reduced. In addition, the recycled resin may be a combination of PCR and post-industrial recycled resin (PIR).

[0009] In the above-mentioned chuck-equipped packaging bag, 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 in the laminate for packaging, the strength of the chuck-equipped packaging bag can be further improved.

[0010] In the above-mentioned chuck-equipped packaging bag, the laminate for packaging material may include a gas barrier layer. In this case, the gas barrier property of the laminate for packaging material is further improved. Therefore, when a packaging bag is manufactured using the laminate for packaging material and the contents are accommodated in the chuck-equipped packaging bag obtained by attaching a chuck mechanism, deterioration of the contents due to gases such as oxygen can be effectively suppressed.

[0011] Yet another aspect of the present disclosure provides a packaged article including the above-mentioned chuck-equipped packaging bag and the contents accommodated in the chuck-equipped packaging bag. The above-mentioned packaged article includes a chuck-equipped packaging bag. The chuck-equipped packaging bag can improve the appearance, hygiene, and sealing property of the contents even when a recycled resin is contained. Therefore, the packaged article can improve the appearance, hygiene, and sealing property of the contents even when a recycled resin is contained in the chuck mechanism.

Advantages of the Invention

[0012] According to the present disclosure, there are provided a chuck-equipped packaging bag and a packaged article that can improve the appearance, hygiene, and sealing property of the contents even when a recycled resin is contained in the chuck mechanism.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

DETAILED DESCRIPTION OF THE INVENTION

[0014] 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 front view showing an embodiment of the laminate for packaging materials according to one aspect of the present disclosure, FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, FIG. 3 is a cross-sectional view showing an example of the laminate for packaging materials that constitutes the front and back members of the packaged article of the present disclosure, and FIG. 4 is a cross-sectional view showing another example of the laminate for packaging materials that constitutes the front and back members of the packaged article of the present disclosure.

[0015] The packaged article 500 shown in FIG. 1 includes a bag 400 with a chuck and contents C housed in the bag 400 with a chuck. The bag 400 with a chuck includes a bag 300 obtained using front and back members 100A and 100B facing each other, and a chuck mechanism 310 provided between the front and back members 100A and 100B. The chuck mechanism 310 is composed of a female fitting member 311 and a male fitting member 312, as shown in FIG. 2. The chuck mechanism 310 is made of a polyolefin resin molded body containing a recycled resin, and the recycled resin is a chemical recycled resin. Also, the bag 300 is obtained using front and back members 100A and 100B facing each other. The front and back members 100A and 100B are composed of a laminate for packaging materials (hereinafter also referred to as a "laminate") 100. As shown in FIGS. 2 and 3, the laminate 100 includes a base material 10 and a seal layer 30. The laminate 100 may further include a second base material 20 between the base material 10 and the seal layer 30. The laminate 100 may further include a printing layer 50, as shown in FIG. 4.

[0016] The above-mentioned packaged article 500 is provided with a bag 400 with a chuck, and even if the bag 400 with a chuck contains recycled resin, the appearance, hygiene, and sealing performance of the contents can be improved. Therefore, even if the chuck mechanism 310 contains recycled resin, the packaged article 500 can improve the appearance, hygiene, and sealing performance of the contents.

[0017] Hereinafter, the bag 300, the chuck mechanism 310, and the contents C will be described in detail.

[0018] <<Bag>> The bag 300 is obtained by using, for example, a laminate 100 including surface members 100A and back members 100B facing each other. Specifically, the bag 300 can also be obtained, for example, by folding one laminate 100 and heat-sealing the overlapping peripheral edges. In this case, the bag 300 is composed of the surface members 100A and back members 100B facing each other and a connecting portion connecting them. Note that the bag 300 can be obtained by, for example, overlapping two laminates 100 and heat-sealing the overlapping peripheral edges. Alternatively, the bag 300 may be a gusset pouch. In this case, for the bag 300, two of the four laminates 100 are used as side laminates, and the remaining two laminates 100 are used as the surface member 100A and the back member 100B, respectively. The two side laminates are folded with the seal layer 30 on the outside, and these two side laminates are inserted between the surface member 100A and the back member 100B, and the overlapping peripheral edges are heat-sealed to obtain the bag 300.

[0019] <Base material> 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 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.

[0020] 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, and acrylic esters. The α-olefin may be an olefin having 3 to 20 carbon atoms. The α-olefin is, for example, 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.

[0021] 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 homopolypropylene but also a copolymer with ethylene or various α-olefins. Examples of polypropylene include homopolypropylene, block polypropylene, and random polypropylene.

[0022] 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 contact 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 a mixture of multiple types of chemically recycled polyolefin resins. 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 preferably formed from a layer structure of two or more layers, and at least one of the layers contains a chemically recycled resin. For example, a three-component five-layer substrate composed of chemically recycled resin / adhesive resin / ethylene-vinyl alcohol copolymer / adhesive resin / chemically recycled resin, a three-component three-layer substrate composed of chemically recycled resin / adhesive resin / ethylene-vinyl alcohol copolymer, a multilayer substrate composed of petroleum-derived (natural) resin / chemically recycled resin / petroleum-derived (natural) resin, or petroleum-derived (natural) resin / other polyolefin / chemically recycled resin / other resin / petroleum-derived (natural) resin, etc. Also, the substrate 10 may be a multilayer substrate obtained by coextrusion multilayer film formation of a layer made of an ethylene-vinyl alcohol copolymer or a layer made of polyamide in a form using an adhesive resin or the like as needed, and stretching the formed film. In addition, in the multilayer substrate, the same kind of material may have different specific gravities according to the function.

[0023] The base material 10 may further contain additives such as fillers, antistatic agents, plasticizers, lubricants, light-shielding pigments, and antioxidants as required. When the base material 10 contains a light-shielding pigment, the base material 10 can function as a light-shielding layer.

[0024] 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. When the base material 10 is a uniaxially stretched film, the laminate 100 can improve tear resistance, heat resistance, etc. When the base material 10 is a biaxially stretched film, the mechanical strength and dimensional stability of the laminate 100 can be improved.

[0025] When an adhesive layer is provided on the surface of the base material 10 on the seal layer 30 side, 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.

[0026] The thickness of the base material 10 is not particularly limited, for example, it is 10 μm or more and 100 μm or less. From the viewpoint of material reduction for environmental load reduction and from the viewpoints of obtaining excellent heat resistance, impact resistance, and gas barrier properties, the thickness of the base material 10 may be 12 μm or more, 20 μm or more, 25 μm or more, 30 μm or more, or 40 μm or more. Also, the thickness of the base material 10 may be 60 μm or less, or 50 μm or less.

[0027] <Seal layer> The seal layer 30 is bonded to the seal layer 30 of another packaging laminate 100 by heating and pressurization when manufacturing the packaging bag 300 using the laminate 100. As the seal layer 30, a sealant film or a heat-seal varnish layer can be used.

[0028] The seal layer 30 preferably has a melting point lower than the melting point of the base material 10 disposed on the outside. In this case, when the laminate 100 is heat-sealed, the seal layer 30 can be heat-sealed 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.

[0029] 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, if necessary. When the seal layer 30 contains a light-shielding pigment, the seal layer 30 can function as a light-shielding layer.

[0030] The seal layer 30 may be a single layer or may be 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 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 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.

[0031] (Sealant film) 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 sealability and the like, and contains a resin made of a polyolefin resin. As the polyolefin resin, the same resin as that 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 is preferable in terms of low adsorbability of the content components and flavor barrier.

[0032] The thickness of the sealant film is not particularly limited and is appropriately adjusted according to the use of the laminate 100 and the like. The thickness of the sealant film 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. Further, the thickness of the sealant film may be 100 μm or less, 80 μm or less, 60 μm or less, or 50 μm or less.

[0033] (Heat seal varnish layer) The heat-sealing layer can be mainly used for a laminate for lightweight packaging materials containing lightweight confectionery as the content. The heat-sealing layer is obtained by applying and drying a heat-sealing agent of acrylic, elastomer, or olefin type. As the heat-sealing agent, a heat-sealing agent obtained by dispersing a heat-sealing component in an aqueous solvent (for example, water) can be used. As the heat-sealing agent, for example, an acrylic resin emulsion obtained by dispersing an acrylic resin as a heat-sealing component in an aqueous solvent, a styrene-acrylic copolymer resin as a heat-sealing component in an aqueous solvent to obtain a styrene-acrylic emulsion, an ionomer emulsion obtained by dispersing an ionomer as a heat-sealing component in an aqueous solvent, a polyolefin emulsion obtained by dispersing a polyolefin resin as a heat-sealing component in an aqueous solvent, etc. can be used. In particular, among polyolefin emulsions, it is preferable to use an aqueous heat-sealing agent obtained by dispersing an aqueous polyolefin resin having at least one selected from a carboxyl group, a salt of a carboxyl group, a carboxylic anhydride group, and a carboxylic ester as a heat-sealing component in an aqueous solvent. The thickness of the heat-sealing layer may be, for example, 0.05 μm or more, 0.5 μm or more, or 1 μm or more, and may be 20 μm or less, 10 μm or less, or 5 μm or less. The thickness of the heat-sealing layer is preferably 1 to 5 μm. In this case, sufficient heat-sealing strength can be obtained and at the same time it can be made resistant to bending.

[0034] <Second substrate> The second substrate 20 is a substrate that reinforces the substrate 10 and can further improve the strength of the laminate 100. The second substrate 20 may be provided on the inner side (seal layer 30 side) of the substrate 10, or may be provided on the outer side (opposite side to the seal layer 30) of the substrate 10. Also, the second substrate 20 may be provided on both sides (inner and outer) of the substrate 10. As the second substrate 20, a film substrate 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 resin, polyamide resins such as 66-nylon, polycarbonate resin, polyacrylonitrile resin, and engineering plastics such as polyimide resin. 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 substrate. The film substrate may be an unstretched film or a stretched film.

[0035] 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 film. When the second substrate 20 is composed of multiple layers, all layers may be recycled resin films, 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 non-recycled resin films, and the intermediate layer may be made of a recycled resin film. In this case, during the retort treatment or boiling treatment of the chucked packaging bag 400, the possibility of foreign substances such as impurities, gels, and aggregates migrating from the second substrate 20 through the seal layer 30 to the content C due to heating can be further reduced. Therefore, the laminate 100 can be safely used for packaging the content C such as food.

[0036] The thickness of the second substrate 20 is not particularly limited and can be appropriately adjusted according to the use of the laminate 100 or the like. 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.

[0037] <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 an "adhesive resin layer").

[0038] Examples of the adhesive include known adhesives such as urethane adhesives, polyester adhesives, polyamide adhesives, epoxy adhesives, and isocyanate adhesives.

[0039] Also, the adhesive may or may not contain a biomass-derived component, but from the viewpoint of reducing environmental impact, it is preferably a biomass-derived component. Specific examples of the biomass-derived component include "Dick Dry BM series" manufactured by DIC Corporation and "ECOAD series" manufactured by Toyo Ink Co., Ltd.

[0040] 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).

[0041] The adhesive resin layer may be an extruded resin layer or a non-extruded resin layer. The adhesive resin is a heat-fusible adhesive thermoplastic resin, and any resin that can be melted by heat and fused with each other is acceptable. For example, resins such as low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear (linear) low-density polyethylene, polypropylene, ethylene-propylene copolymer, methylpentene polymer, and polyolefin-based resins such as polyethylene or polypropylene modified with unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, and others can be used.

[0042] 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 adhesive layer may be 50 μm or less, may be 5 μm or less, and may also be 3 μm or less.

[0043] <Printing layer> The printing layer 50 can be provided on one or both surfaces of the base material 10 and the second base material 20. When the printing layer 50 is provided between the layers of the laminate 100, since the printing layer 50 is protected by the base material 10 or the second base material 20, it is possible to prevent the printing layer 50 from deteriorating. When the printing layer 50 becomes the outermost layer on the side opposite to the seal layer 30 in the laminate 100 as shown in FIG. 4, it becomes possible to easily remove the printing layer 50 when recycling after discarding the packaging bag 300 including the laminate 100. The printing layer 50 is a layer that displays 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.

[0044] The ink may be aqueous ink or oily ink, but aqueous ink is preferred. Since aqueous ink uses water or alcohol as a solvent, the environmental impact can be further reduced. In particular, when the adhesive is a solvent-free adhesive, using aqueous ink as the ink can significantly reduce the environmental impact. Also, the ink may or may not be biomass ink, but from the perspective of reducing the environmental impact, 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 collecting and recycling used ink or non-recycled ink, but from the perspective of reducing the environmental impact, recycled ink is preferred. Furthermore, easily recyclable ink can also be used. By using easily recyclable ink, it becomes possible to easily recycle the chucked packaging bag 400 after disposal. Specifically, "SunSpectro Solvawash" manufactured by DIC Corporation, etc. can be mentioned.

[0045] <Gas barrier layer> As shown in FIG. 4, 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 the seal layer 30 side of the base material 10 as shown in FIG. 4, may be provided on the side of the base material 10 opposite to the seal layer 30, or may be provided on both sides of the base material 10. Also, when the laminate 100 includes the second base material 20, the gas barrier layer 60 may be provided on the base material 10 side of the second base material 20 as shown in FIG. 4, may be provided on the seal layer 30 side of the second base material 20, or may be provided on both sides 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.

[0046] As the gas barrier layer 60, for example, a vapor deposition layer such as a vapor deposition layer of a metal or 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 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.

[0047] <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).

[0048] The pair of laminates 100 constituting the bag with a chuck 400 may have the same configuration as each other or may have different configurations from each other.

[0049] The bag with a chuck 400 may be provided with a half-cut line, and may further be provided with an easy-opening processing portion at both ends or one end of the half-cut line. Examples of the easy-opening processing portion include a group of scars, notches such as V-shaped, U-shaped or I-shaped.

[0050] In the adhesion portion of the bag with a chuck 400, the seal layers 30 of the laminate 100 may be directly adhered to each other by heat sealing (see FIG. 2), or may be adhered to each other by an adhesive.

[0051] <<Chuck mechanism>> The chuck mechanism 310 is composed of a female fitting member 311 and a male fitting member 312. The female fitting member 311 and the male fitting member 312 are each made of a polyolefin resin molded body containing recycled resin, and the recycled resin is a chemical recycled resin. The recycled 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 of PCR can be secured in the market, if the chemical recycled resin is PCR, the cost of the bag with a chuck 400 can be reduced. The content rate of the recycled resin in the chuck mechanism 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. Also, the content rate of the recycled resin in the chuck mechanism 310 may be 100% by mass. The chuck mechanism 310 may be attached at any position between the front surface member 100A and the back surface member 100B in the packaging bag 300. However, from the viewpoint of sufficiently accommodating the content C, the chuck mechanism 310 is preferably disposed in the vicinity of the heat seal portion between the front surface member 100A and the back surface member 100B. The male fitting member 312 as a chuck member constituting the chuck mechanism 310 has, for example, a tape-shaped support portion 312a fixed to the seal layer 30 of the front surface member 100A, and a convex portion 312b provided on the support portion 312a (see FIG. 2). The female fitting member 311 as a chuck member constituting the chuck mechanism 310 has, for example, a tape-shaped support portion 311a fixed to the back surface member 100B, and two protruding portions 311b provided on the support portion 311a. The two protruding portions 311b form a space for accommodating and fitting the convex portion 312b of the male fitting member 312 (see FIG. 2).

[0052] <<Content>> The content C is not particularly limited and may be appropriately selected according to the use of the resealable packaging bag 400. The content C is not particularly limited, and examples of the content C include foods, shampoos, rinses, body soaps, detergents, and the like.

[0053] <<Resealable packaging bag>> (A) Content of recycled resin In the resealable packaging bag 400, the content of the chemical recycled resin is preferably 10% by mass or more. In addition, when the chuck mechanism 310, the base material 10, the second base material 20, the seal layer 30, and other layers containing the chemical recycled resin are a mixture of the chemical recycled resin and a non-recycled resin such as a petroleum-derived resin or a biomass-derived resin, the mass of the chemical recycled resin in each of the chuck mechanism 310, the base material 10, the second base material 20, the seal layer 30, and other layers is calculated according to the mass ratio, and the content (%) of the chemical recycled resin in the resealable packaging bag 400 is calculated.

[0054] The chemical recycled 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, when the chemical recycled resin is PCR, the cost of the resealable packaging bag 400 can be reduced.

[0055] (B) Odor component Regarding the chuck mechanism 310 of the resealable packaging bag 400, in the total ion chromatogram obtained by performing mass spectrometry using purge-and-trap gas chromatography-mass spectrometry, when the ratio of the peak area of nonanal as an index of the odor component to the total of the peak area values of all aliphatic hydrocarbon components is R1 (%) and the ratio of the peak area of decanal to the total of the peak area values of all aliphatic hydrocarbon components is R2 (%), R1 is preferably less than 1.5%, more preferably 1.0% or less, and particularly preferably 0.5% or less. Further, 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 laminate 100 as a whole is suppressed, and the quality of the laminate 100 can be further improved. Specifically, for the above mass spectrometry, 1.0 gram of the sample is cut out from the chuck mechanism 310 of the chucked packaging bag 400, this sample is put into a 20 mL vial together with the trapping body for odor components, heated at 60°C for 1 hour to adsorb the volatile components from the sample to the trapping body, and for the volatile components in the trapping body, it is carried out with a purge and trap gas chromatograph mass spectrometer.

[0056] (C) Appearance Fish eyes refer to foreign matters such as spots (gelified products) like fish eyes and carbides. When there is a fish eye with a diameter of 1 mm or more, it is a defective product. In the chuck mechanism 310, the number of fish eyes with a diameter of 0.5 mm or more and less than 1 mm is 100 pieces / m 2 Hereinafter, more preferably 50 pieces / m 2 Hereinafter, particularly preferably 10 pieces / m 2 It is preferably the following.

[0057] (D) Impurities Separate the chuck mechanism 310 from the chucked packaging bag 400, and for this chuck mechanism 310, perform analysis using the total reflection measurement method (ATR: Attenuated Total Reflection) with a Fourier transform infrared spectrometer (FT-IR: Fourier Transform Infrared Spectroscopy) to obtain an ATR spectrum. When the ATR spectrum is obtained, for the absorption coefficient of the stretching of the methylene group C-H inverse object near 2915 cm -1 derived from polyethylene, for the absorption coefficient of the stretching of the methylene group C-H inverse object near 2915 cm, the absorption coefficient of the stretching of the carbonyl group C=O derived from polyester and polyurethane at 1720 cm -1The ratio R3 of the absorption coefficient of the nearby C=O stretching is preferably less than 0.1, more preferably less than 0.05, and particularly preferably 0.01 or less as an index indicating that there is little resin component other than polyolefin. In the above analysis, a diamond prism is used as the prism that is brought into close contact with the chuck mechanism 310, and the incident angle with respect to the surface of the chuck mechanism 310 is 45°.

[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, one laminate 100 is prepared. On the other hand, a female fitting member 311 and a male fitting member 312 that constitute the chuck mechanism 310 are prepared. Then, the male fitting member 312 is fixed to the surface of the seal layer 30 of the portion that will become the surface member 100A of the laminate 100 using, for example, an adhesive. Specifically, the support portion 312a of the male fitting member 312 is adhered to the surface of the seal layer 30. Also, the female fitting member 311 is fixed to the surface of the seal layer 30 of the portion that will become the back member 100B of the laminate 100 using, for example, an adhesive. Specifically, the support portion 311a of the female fitting member 311 is adhered to the surface of the seal layer 30. Next, the laminate 100 is bent in half so that the seal layers 30 face each other, the male fitting member 312 and the female fitting member 311 are overlapped, and the male fitting member 312 is fitted into the female fitting member 311. Specifically, the convex portion 312b of the male fitting member 312 is fitted into the space formed by the two protruding portions 311b of the female fitting member 311. At this time, the content C is disposed between the portions of the laminate 100 that face each other. Then, the overlapping peripheral portions are heat-sealed and adhered. In this way, the chucked packaging bag 400 is obtained, and at the same time, the packaged article 500 is obtained.

[0060] Although the embodiments of the present disclosure have been described above, the outline of the present disclosure is as follows. [1] A packaging bag obtained by using a front surface member and a back surface member facing each other, and a chuck mechanism provided between the front surface member and the back surface member, The chuck mechanism is a chucked packaging bag composed of a female fitting member and a male fitting member, The front surface member and the back surface member are composed of a laminate for packaging materials including at least a base material and a seal layer, The chuck mechanism is made of a polyolefin resin molded body containing a recycled resin, The chucked packaging bag, wherein the recycled resin is a chemical recycled resin [2] The chucked packaging bag according to [1], wherein the content rate of the chemical recycled resin in the chucked packaging bag is 10% by mass or more. [3] The chucked packaging bag according to [1], wherein the content rate of the chemical recycled resin in the chucked packaging bag is 20% by mass or more. [4] The chucked packaging bag according to any one of [1] to [3], wherein the recycled resin is a post-consumer recycled resin. [5] The chucked packaging bag according to any one of [1] to [4], further comprising a second base material between the base material and the seal layer. [6] The chucked packaging bag according to any one of [1] to [5], further comprising a gas barrier layer between the base material and the seal layer. [7] A packaged article comprising the chucked packaging bag according to any one of [1] to [6], and the contents accommodated in the chucked packaging bag.

Example

[0061] The present disclosure will be further specifically described by the following examples, but the present disclosure is not limited to these examples.

[0062] (Example 1) As the base material, a biaxially stretched PET film (thickness 12 μm) derived from petroleum was prepared. Also, as the second substrate, a biaxially stretched PET film (thickness: 12 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 the sealant film which is the seal layer, a petroleum-derived LLDPE film (thickness: 50 μm) composed of 100% by mass of linear low-density polyethylene (LLDPE) derived from petroleum was prepared. Then, an adhesive for dry lamination (urethane-based adhesive) was applied to the surface of the substrate to form an adhesive layer with a thickness of 3 μm (dry film thickness), and the second substrate 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 the seal layer was bonded to this adhesive layer to produce a laminate for packaging material (substrate / adhesive layer / second substrate / vapor deposition layer / overcoat layer / adhesive layer / seal layer). A rectangular surface member and back member with dimensions of 20 cm × 15 cm were cut out and prepared from the above laminate for packaging material. On the other hand, using a used packaging material, a female fitting member and a male fitting member as resin molded bodies made of chemically recycled LLDPE (PCR Chem R100%-LLDPE) with a length of 15 cm were prepared. Then, on the surface of the seal layer of the surface member, at a position 2 cm from the short side (upper side) of the surface member and parallel to this short side, the male fitting member was attached with an adhesive, and on the surface of the seal layer of the back member, at a position 2 cm from the short side (upper side) of the back member and parallel to this short side, the female fitting member was attached with an adhesive. The female fitting member was molded to have a tape-shaped support portion with a width of 12 mm and a thickness of 1.8 mm, and two protrusions with an arcuate cross-section provided thereon, and the male fitting member was molded to have a tape-shaped support portion with a width of 12 mm and a thickness of 1.8 mm, and one convex portion provided thereon. Then, the front member and the back member were overlapped in a state where the male fitting member and the female fitting member were fitted together, and heat sealing was performed with only the peripheral portions along the short sides (upper sides) of the peripheral portions of the front member and the back member among the peripheral portions of the front member and the back member being unsealed portions. Thus, a chuck-packaging bag having a chuck mechanism was obtained. In the obtained chuck-packaging bag, the content rate of the chemical recycling resin was 22.1 mass%, and the content rate of the chemical recycling resin in the chuck mechanism was 100 mass%.

[0063] (Example 2) As a base material, a petroleum-derived LLDPE film (thickness: 20 μm) was prepared. Also, as a second base material, a petroleum-derived LLDPE film (thickness: 20 μm) was prepared. After forming an AL vapor deposition film (thickness: 10 nm) on the surface of the second base material, 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 petroleum-derived 100% LLDPE film (thickness: 50 μm) made of 100 mass% of petroleum-derived linear low-density polyethylene (LLDPE) 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 material (base material / adhesive layer / second base material / vapor deposition layer / overcoat layer / adhesive layer / seal layer). Rectangular front members and back members with dimensions of 20 cm × 15 cm were cut out and prepared from the above laminate for packaging material. On one hand, using the used packaging material, a female fitting member and a male fitting member as resin molded bodies made of chemically recycled LLDPE (PCR Chem R100%-LLDPE) with a length of 15 cm were prepared. Then, on the surface of the seal layer of the surface member, at a position 2 cm from the short side, the male fitting member was attached parallel to the short side with an adhesive. And on the surface of the seal layer of the back member, at a position 2 cm from the short side, the female fitting member was attached parallel to the short side with an adhesive. Note that the female fitting member was molded to have a tape-shaped support part with a width of 12 mm and a thickness of 1.8 mm, and two protrusions with an arc-shaped cross-section provided thereon. The male fitting member was molded to have a tape-shaped support part with a width of 12 mm and a thickness of 1.8 mm, and one convex part provided thereon. Then, the surface member and the back member were overlapped with the male fitting member and the female fitting member fitted together, and heat sealing was performed on the peripheral edges of the surface member and the back member. Thus, a bag with a chuck was obtained. In the obtained bag with a chuck, the content rate of the chemically recycled resin was 18.4% by mass, and the content rate of the chemically recycled resin in the chuck mechanism was 100% by mass.

[0064] (Example 3) As the base material, a biaxially stretched PET film (thickness 12 μm) derived from petroleum was prepared. Also, as the second base material, a biaxially stretched PET film (thickness 12 μm) derived from petroleum was prepared. After forming an AL vapor deposition film (thickness 10 nm) on the surface of the second base material, 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 the sealant film which is the seal layer, an LLDPE film (thickness 50 μm) formed by mixing 50% by mass of linear low-density polyethylene (LLDPE) derived from petroleum and 50% by mass of chemically recycled LLDPE 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). A sealant film as a seal layer was laminated onto this adhesive layer to produce a laminate for packaging material (base material / adhesive layer / second base material / vapor deposition layer / overcoat layer / adhesive layer / seal layer). Rectangular surface members and back surface members each having dimensions of 20 cm × 15 cm were cut out and prepared from the above laminate for packaging material. On the other hand, using a used packaging material, a female fitting member and a male fitting member as resin molded bodies made of chemically recycled LDPE (PCR Chem R100% - LDPE) with a length of 15 cm were prepared. Then, on the surface of the seal layer of the surface member, at a position 2 cm from the short side and parallel to the short side, the male fitting member was attached with an adhesive. Also, on the surface of the seal layer of the back surface member, at a position 2 cm from the short side and parallel to the short side, the female fitting member was attached with an adhesive. The female fitting member was molded to have a tape-shaped support portion with a width of 12 mm and a thickness of 1.8 mm, and two protruding portions with an arcuate cross-section provided thereon. The male fitting member was molded to have a tape-shaped support portion with a width of 12 mm and a thickness of 1.8 mm, and one convex portion provided thereon. Then, the surface member and the back surface member were overlapped in a state where the male fitting member and the female fitting member were fitted together, and heat sealing was performed on the peripheral portions of the surface member and the back surface member. Thus, a chuck-equipped packaging bag was obtained. In the obtained chuck-equipped packaging bag, the content rate of the chemically recycled resin was 42.4% by mass, and the content rate of the chemically recycled resin in the chuck mechanism was 100% by mass.

[0065] (Example 4) A laminate for packaging material was produced in the same manner as in Example 1, except that the base material and the second base material of the surface member and the back surface member were changed from a biaxially stretched PET film (thickness: 12 μm) derived from petroleum to an LLDPE film (thickness: 20 μm) derived from petroleum. Rectangular surface members and back surface members each having dimensions of 20 cm × 15 cm were cut out and prepared from the above laminate for packaging material. On one hand, the resin molded bodies constituting the female fitting member and the male fitting member were prepared in the same manner as in Example 1, except that they were changed from chemically recycled low-density polyethylene (PCR Chem R100%-LDPE) to chemically recycled linear low-density polyethylene (PCR Chem R100%-LLDPE) using used packaging materials. Then, the female fitting member and the male fitting member were attached to the surfaces of the seal layers of the front member and the back member in the same manner as in Example 1. Then, the front member and the back member were overlapped with the male fitting member and the female fitting member facing each other, and heat sealing was performed on the peripheral edges of the front member and the back member. Thus, a bag with a chuck was obtained. In the obtained bag with a chuck, the content rate of the chemically recycled resin was 41.5% by mass, and the content rate of the chemically recycled resin in the chuck mechanism was 100% by mass.

[0066] (Comparative Example 1) A bag with a chuck was obtained in the same manner as in Example 1, except that the resin molded bodies constituting the female fitting member and the male fitting member were changed from chemically recycled LLDPE (PCR Chem R100%-LLDPE) to materially recycled LLDPE (PCR MR100%-LLDPE) using used polyethylene bags. In the obtained bag with a chuck, the content rate of the chemically recycled resin was 20.3% by mass, and the content rate of the chemically recycled resin in the chuck mechanism was 0% by mass.

[0067] (Reference Example 1) A bag with a chuck was obtained in the same manner as in Example 3, except that the resin molded bodies constituting the female fitting member and the male fitting member were changed from chemically recycled LDPE (PCR Chem R100%-LDPE) to petroleum-derived LLDPE. In the obtained bag with a chuck, the content rate of the chemically recycled resin was 20.3% by mass, and the content rate of the chemically recycled resin in the chuck mechanism was 0% by mass.

[0068] <Evaluation> Regarding the zipped packaging bags of the examples, comparative examples, and reference examples prepared as described above, Evaluation 1 (generation of odor components), Evaluation 2 (impurities), Evaluation 3 (fish eyes), and Evaluation 4 (sealability of the contents) were conducted as follows. Here, Evaluation 1 and 2 are evaluations related to hygiene, Evaluation 3 is an evaluation related to appearance, and Evaluation 4 is an evaluation related to the sealability of the contents.

[0069] (1) Evaluation 1 (generation of odor components) First, the chuck mechanism of the zipped packaging bag was analyzed using purge and trap gas chromatography-mass spectrometry. Specifically, 1.0 gram of the sample was cut out from the zipped packaging bag, 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. The volatile components in the trap were analyzed 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, the evaluation was conducted 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

[0070] (2) Evaluation 2 (impurities) Regarding the chuck mechanism of the bag with a chuck, analysis was performed using the total reflection measurement method (ATR: Attenuated Total Reflection) with a Fourier transform infrared spectrophotometer (FT-IR: Fourier Transform Infrared Spectroscopy) to obtain an ATR spectrum. At this time, a diamond prism was used as the prism that adheres to the chuck mechanism of the bag with a chuck, and the incident angle with respect to the surface of the chuck mechanism was set to 45°. Then, in the ATR spectrum, the ratio R3 of the absorption coefficient of C=O stretching around 1720 cm -1 derived from polyester and polyurethane to the absorption coefficient of methylene group C-H antisymmetric stretching around 2915 cm -1 derived from polyethylene was calculated, and evaluation was performed based on the following evaluation criteria. The results are shown in Table 1. (Evaluation Criteria) ◎ ··· R3 is less than 0.05 ○ ··· R3 is 0.05 or more and less than 0.1 × ··· R3 is 0.1 or more

[0071] (3) Evaluation 3 (Fish Eye) The chuck mechanism (male fitting member and female fitting member) was separated from the bag with a chuck to obtain a sample. This sample was placed on a black table, and in a region with dimensions of 1 m × 1 m, the number N1 of protrusions (bulging foreign matters) with a diameter of 0.5 mm or more and less than 1 mm was visually counted as fish eye 1, and the number N2 of protrusions (bulging foreign matters) with a diameter of 1 mm or more was visually counted as fish eye 2, and evaluation was performed based on the following evaluation criteria. The results are shown in Table 1. (Evaluation Criteria) ◎ ··· N1 is 10 or less and N2 is 0 ○ ··· N1 is 11 - 99 and N2 is 0 × ··· N1 is 100 or more or N2 is 1 or more

[0072] (4) Evaluation 4 (Sealability of Contents) Regarding the chucked packaging bag, a test piece with a width of 10 mm and a length of 8 cm was cut out along the longitudinal direction from the short side (upper side) of the surface member and the back member. Then, the two ends of the test piece on the side opposite to the upper side were respectively set on the upper chuck and the lower chuck of the tensile strength tester, and the fitting strength of the chuck mechanism was measured at a test speed of 300 mm / min in a T-type strength test. And this fitting strength was used as an index for the sealing performance of the contents, and the sealing performance of the contents was evaluated based on the following criteria. The results are shown in Table 1. (Evaluation Criteria) ◎ ··· The fitting strength is 50 N / cm or more ○ ··· The fitting strength is 40 N / cm or more and less than 50 N / cm × ··· The fitting strength is less than 40 N / cm

[0073]

Table 1

[0074] From the results shown in Table 1, the chucked packaging bag of the example using chemical recycling resin as the recycling resin of the chuck mechanism has less generation of odor components and less impurities and is excellent in hygiene compared with the chucked packaging bag of Comparative Example 1 using material recycling resin as the recycling resin of the chuck mechanism. Also, the chucked packaging bag of the example had fewer fish eyes (foreign substances) and better appearance compared with the chucked packaging bag of Comparative Example 1. Furthermore, it was found that the chucked packaging bag of the example had better fitting property of the chuck mechanism and better sealing property of the contents compared with the chucked packaging bag of Comparative Example 1.

[0075] From the above, it was confirmed that according to the chucked packaging bag of the present disclosure, even if the chuck mechanism contains a recycling resin, the appearance, hygiene, and sealing property of the contents can be improved.

Explanation of Signs

[0076] 10…Base material, 20…Second base material, 30…Sealing layer, 60…Gas barrier layer, 100…Laminate for packaging material, 300…Packaging bag, 310…Chuck mechanism, 311…Female fitting member, 312…Male fitting member, 400…Packaging bag with chuck, 500…Packaged article, C…Contents.

Claims

1. A packaging bag obtained using surface members and back surface members facing each other, and a chuck mechanism provided between the surface member and the back surface member, wherein the chuck mechanism is a chuck-equipped packaging bag comprising a female fitting member and a male fitting member, the surface member and the back surface member are composed of a laminate for packaging material including at least a base material and a seal layer, the chuck mechanism is made of a polyolefin resin molded body containing a recycled resin, and the recycled resin is a chemical recycled resin. A chuck-equipped packaging bag.

2. The chuck-equipped packaging bag according to Claim 1, wherein the content rate of the chemical recycled resin in the chuck-equipped packaging bag is 10% by mass or more.

3. The chuck-equipped packaging bag according to Claim 1, wherein the content rate of the chemical recycled resin in the chuck-equipped packaging bag is 20% by mass or more.

4. The chuck-equipped packaging bag according to Claim 1, wherein the recycled resin is a post-consumer recycled resin.

5. The chuck-equipped packaging bag according to Claim 1, wherein the laminate for packaging material further includes a second base material on one side or both sides of the base material.

6. The chuck-equipped packaging bag according to Claim 1, wherein the laminate for packaging material further includes a gas barrier layer between the base material and the seal layer.

7. A packaged article comprising the chuck-equipped packaging bag according to any one of Claims 1 to 6, and contents accommodated in the chuck-equipped packaging bag.

Images