Packaging Container

Abstract

To provide a package that can be bent and fixed compactly and can be sealed again.SOLUTION: A package 101 includes at least an upper part 131 as a first edge, and a bottom part 132 facing the upper part 131 as a second edge. The package 101 includes a hook-and-loop fastener part 180 arranged extending in a direction of connecting the upper part 131 and the bottom part 132. The hook-and-loop fastener part 180 includes a hook-shaped engagement element 181. As a result, the package 101 can be bent and fixed compactly and can be sealed again.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a packaging container with a resealable function. [Background technology]

[0002] In recent years, the demand for resealable packages has been growing due to the increasing volume of products and the increase in applications where the contents are used little by little. Patent Document 1 discloses a configuration that achieves the resealable function by using a zipper member with a fitting portion having a concave-convex shape.

[0003] However, a packaging container with a fitting part on the inner surface of the bag as in Patent Document 1 requires space for storage because the shape of the bag cannot be changed even if the contents decrease with use. It would be fine if the packaging container could be folded and fixed compactly, but when a zipper member (zipper tape) as used in Patent Document 1 is used and positioned to intersect with the folding line, the convex shapes (male shapes) or the concave shapes (female shapes) face each other, making it impossible to fit together. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-77916 A Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a packaging container which can be folded and fixed compactly and which can be resealed. [Means for solving the problem]

[0006] The present invention solves the above problems by the following solving means. Note that, for ease of understanding, the following description will be given with reference numerals corresponding to the embodiments of the present invention, but the present invention is not limited thereto.

[0007] The first invention is a packaging container (101) having at least a first edge (131) and a second edge (132) opposite the first edge (131), and is provided with a hook-and-loop fastener portion (180) arranged extending in a direction connecting the first edge (131) and the second edge (132), the hook-and-loop fastener portion (180) including a hook-shaped engaging element (181).

[0008] A second invention is a packaging container (101) according to the first invention, characterized in that the hook-and-loop fastener portions (180) are arranged in a row in a direction intersecting the direction in which the hook-and-loop fastener portions (180) extend.

[0009] A third invention is a packaging container (101) according to the first or second invention, characterized in that the loop stiffness of the hook-and-loop fastener portion (180) alone is 7000 mN or less under the conditions of a loop length of 60 mm, a pushing speed of 3.3 mm / s, and a pushing hold time of 3 s.

[0010] A fourth invention is a packaging container (101) according to any one of the first to third inventions, characterized in that the hook-and-loop fastener portion (180) further comprises an array of a plurality of columnar engaging elements (182) rising up from the fastener surface.

[0011] A fifth invention is a packaging container (101) according to any one of the first to fourth inventions, characterized in that the packaging container (101) has a first packaging material portion (121) and a second packaging material portion (122) constituted by a laminate film (160) having at least a base material layer (161) and a sealant layer (164), a storage portion (102) capable of storing contents, sealing portions (141, 142, 143) formed around the storage portion (102), and a portion to be sealed that is to be sealed after the contents are stored. Effect of the Invention

[0012] According to the present invention, it is possible to provide a packaging container that can be folded and fixed compactly and that can be resealed. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a plan view of a packaging container 101 according to a first embodiment. [Diagram 2] 2 is a cross-sectional view of the packaging container 101 taken along the position of the arrow AA in FIG. [Diagram 3] 1 is a cross-sectional view of a laminated film 160 used in the packaging container 101 of the present embodiment. [Figure 4] FIG. 13 is a perspective view of a hook-and-loop fastener portion 180 in the form of hook-and-loop fastener A. [Diagram 5] FIG. 1 is a plan view of a hook-and-loop fastener portion 180 in the form of hook-and-loop fastener A. [Figure 6] 6 is a cross-sectional view of a hook-and-loop fastener portion 180 in the form of hook-and-loop fastener A taken along the position of arrow BB in FIG. 5. [Figure 7] 6 is a cross-sectional view of a hook-and-loop fastener portion 180 in the form of hook-and-loop fastener A taken along the position of arrow CC in FIG. 5. [Figure 8] 13 is a diagram for explaining the dimensions of hook-shaped engaging elements 181 and columnar engaging elements 182 in the form of the hook-and-loop fastener A. FIG. [Figure 9] FIG. 9 is a diagram showing the dimensions d1 to d11 shown in FIG. 5 and FIG. [Figure 10]13 is a perspective view of a hook-and-loop fastener portion 180 of hook-and-loop fasteners B and C. FIG. [Figure 11] 13 is a plan view of the hook-and-loop fastener portion 180 of hook-and-loop fasteners B and C. FIG. [Figure 12] 12 is a cross-sectional view of a hook-and-loop fastener portion 180 in the form of hook-and-loop fasteners B and C taken along the position of the arrow GG in FIG. [Figure 13] 12 is an enlarged cross-sectional view of a hook-and-loop fastener portion 180 of the hook-and-loop fasteners B and C taken along the position of the arrow HH in FIG. [Figure 14] FIG. 14 is a diagram showing the dimensions d1 to d10 shown in FIGS. 11 and 13. [Figure 15] FIG. 1 is a diagram showing a state in which the packaging container 101 is opened. [Figure 16] FIG. 1 shows the packaging container 101 after it has been resealed. [Figure 17] FIG. 13 is a diagram showing the state in which the hook-and-loop fastener portion 180 has been joined. [Figure 18] FIG. 2 is a plan view showing an example of a loop stiffness measuring device. [Figure 19] FIG. 19 is a cross-sectional view of the loop stiffness measuring device of FIG. 18 taken along line GG. [Figure 20] FIG. 1 is a diagram for explaining a process of attaching a test piece to a loop stiffness measuring device. [Figure 21] FIG. 13 is a diagram for explaining a step of forming a loop portion in a test piece. [Figure 22] FIG. 13 is a diagram for explaining a process of applying a load to a loop portion of a test piece. [Diagram 23] FIG. 13 is a diagram for explaining a process of applying a load to a loop portion of a test piece. [Figure 24] This figure summarizes the results of creating samples of multiple types of packaging containers and evaluating the ease of joining when resealing them. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

[0015] (Embodiment) Fig. 1 is a plan view of a packaging container 101 of the first embodiment. In Fig. 1, the sealed area is indicated by hatching, and this is also shown in the drawings of the other embodiments. FIG. 2 is a cross-sectional view of the packaging container 101 taken along the position of the arrow AA in FIG. 1 and 2, the figures shown below are schematic diagrams, and the size and shape of each part are exaggerated or omitted as appropriate for ease of understanding. For example, in Fig. 2, only the base layer 161 and the sealant layer 164 are shown, and other layers are omitted. In the following description, specific numerical values, shapes, materials, etc. are given, but these can be changed as appropriate.

[0016] The packaging container 101 of this embodiment is distributed and sold, for example, with various contents stored therein, and after opening, a part of the contents can be removed and the container can be resealed (reclosed) with the remainder stored therein. The contents may be any type, such as a solid, a powder, or a liquid.

[0017] (Container body) 1, the container body 106 of the packaging container 101 is a bag-like container in the form of a so-called flat pouch sealed on all four sides, and is made of a flexible laminated film (packaging material). The laminated film constituting the container body 106 includes a surface film (first packaging material part) 121 that forms the surface, and a back film (second packaging material part) 122 that forms the back surface.

[0018] In this embodiment, the front film 121 and the back film 122 are composed of a laminated film having a substantially rectangular shape. The substantially rectangular shape is not limited to a geometric rectangle, but includes a shape that is recognized as a rectangle in an overall view. For example, one or more of the side edges, bottom edges, and top edges may include curved portions. In addition, the corners of the laminated film may be rounded in an outwardly convex arc shape.

[0019] In addition, the front film 121 and the back film 122 may be separate laminated films or may be joined laminated films before the container body 106 is formed. The joined laminated films are folded to form the front film 121 and the back film 122.

[0020] In this embodiment, the container body 106 is formed by a front film 121 and a back film 122 that are individually configured. At the upper part (first edge) 131 of the container body 106, the upper part of the front film 121 and the upper part of the back film 122 are joined by heat sealing (thermal welding). By this joining, an upper seal part 141 is formed in the upper part 131 of the container body 106 as a seal part joining the upper part of the front film 121 and the upper part of the back film 122.

[0021] At the side 133 of the container body 106, the side of the front film 121 and the side of the back film 122 are joined by heat sealing. By this joining, a side seal portion 143 is formed on each of the left and right side portions 133 of the container body 106 as a seal portion joining the side of the front film 121 and the side of the back film 122. The left and right side seal portions 143 are formed so that their respective upper ends are continuous with the upper seal portion 141, and also so that the vicinity of their respective lower ends is continuous with the bottom seal portion 142 described below. The side seal portion 143 is provided with a notch 107 for separating the upper seal portion 141 of the container body portion 106 to form an opening OP (see FIG. 15). The notch 107 is provided to separate the upper seal portion 141 from the container body portion 106 to open the packaging container 101. The notch 107 is a cut provided on the upper end side of the side seal portion 143, below the upper seal portion 141, and approximately parallel to the upper seal portion 141, and is provided from the edge of the side portion 133 of the container body portion 106 to the storage portion 102 side so as not to penetrate into the storage portion 102. Note that an easy-open line such as a half-cut line may be provided instead of the notch 107 or together with the notch 107.

[0022] The bottom of the front film 121 and the bottom of the back film 122 are joined at the bottom (second edge) 132 of the container body 106. In this manner, a bottom seal portion 142 is formed at the bottom 132 of the container body 106. The storage section 102 is a space inside the container body 106 that can store the contents. When the upper seal portion 141 is separated from the container body 106 using the notch 107 to open the packaging container 101, the upper part of the storage section 102 is opened.

[0023] Before the contents are contained in the container body 106, at least one of the upper seal portion 141, the bottom seal portion 142, and the side seal portion 143 is in an unsealed sealed state, and after the contents are contained in the container portion 102 through this sealed portion, the contents can be hermetically sealed by heat sealing (joining) the sealed portion.

[0024] (Laminated film) FIG. 3 is a cross-sectional view of a laminated film 160 used in the packaging container 101 of this embodiment. The front film 121 and the back film 122 constituting the container body 106 are made of a laminated film 160. As described above, the container body 106 is made into a bag by heat-sealing the laminated film 160 constituting the pair of the front film 121 and the back film 122. For this reason, the laminated film 160 is provided with at least a base material layer 161 and a sealant layer 164 having sealing properties on the portion that will be on the inner side of the container. In addition, a plurality of base material layers may be provided, and the sealant layer may be composed of a plurality of layers. In the container body 106 of the present embodiment, a base material layer 161 serving as a printing base material is provided on a portion that is closer to the container outer side than the sealant layer 164. Note that the laminated film 160 may be configured to include other layers 163 as necessary to impart various functions according to the application.

[0025] The base layer 161 may be, for example, a stretched polyethylene terephthalate film, a silica-vapor-deposited stretched polyethylene terephthalate (PET) film, an alumina-vapor-deposited stretched polyethylene terephthalate film, a stretched polyamide film, a stretched polypropylene film, or a composite film formed by laminating two or more of these films.

[0026] Preferably, the base layer 161 is biaxially stretched. As a result, the molecules constituting the base layer 161 are aligned in the stretching direction by the stretching process, and the base layer 161 exhibits excellent dimensional stability. In addition, the biaxial stretching process can impart easy-opening properties to the base layer 161.

[0027] The thickness of such a base material layer 161 is, for example, about 10 to 50 μm. In this case, it is possible to reduce production costs while satisfying the heat resistance required for the container body 106. Note that the base material layer 161 of this embodiment also functions as the layer of the laminated film 160 that is located on the outermost side of the container when the container body 106 is made into a bag.

[0028] 3, in this embodiment, a pattern layer 162 including a pattern is laminated on the surface of the base layer 161 facing the inside of the container. Here, the pattern refers to various types of recording objects that can be recorded or printed on the base layer 161, and is not particularly limited and broadly includes figures, characters, designs, patterns, symbols, patterns, marks, etc. Note that the pattern layer 162 is laminated on the base layer 161 as necessary, and the base layer 161 does not necessarily need to be provided with the pattern layer 162. In that case, for example, various indications may be made by attaching a label.

[0029] In this embodiment, the pattern layer 162 is applied to the inner surface of the base material layer 161, not to the outer surface of the base material layer 161 which is on the outer side of the container. In this case, the pattern layer 162 has excellent abrasion resistance, and therefore can effectively prevent disappearance due to rubbing, etc., and can also effectively prevent tampering with the pattern. In addition, it is preferable that the base material layer 161 has transparency so that the pattern layer 162 laminated on the inner surface of the base material layer 161 can be visually recognized through the base material layer 161 when the packaging container 101 is made into a bag.

[0030] As described above, the sealant layer 164 is provided to bond and seal the edges of the two laminated films 160 by overlapping them and heat-sealing the areas near the opposing edges. In this embodiment, the sealant layer 164 is disposed on the side of the laminated film 160 that will be the innermost side of the container when the container body 106 is made into a bag.

[0031] Films made of polyolefin resins such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, and ethylene-propylene block copolymer, and conventionally known easy-peel films can be used as the sealant layer 164. The sealant layer 164 may be formed as a single layer using films made of these materials, or may be formed as multiple layers.

[0032] Furthermore, when the packaging container 101 is used as a container for a microwave oven, heat resistance is required, so it is preferable that the sealant layer 164 has a non-oriented polypropylene layer (CPP layer) mainly containing non-oriented polypropylene (CPP), or a linear low-density polyethylene layer (LLDPE layer) mainly containing linear low-density polyethylene (LLDPE).

[0033] The thickness of the sealant layer 164 is preferably 30 μm or more. Also, the thickness of the sealant layer 164 is preferably 200 μm or less. In this case, the packaging container 101 has excellent impact resistance against dropping that may occur during distribution, and also has excellent handling properties such as ease of filling the contents and ease of refilling the contents.

[0034] On the other hand, the other layer 163 can be provided to supplement various functions depending on the application, and its position can be appropriately selected. In order to preserve the contents for a long period of time, the other layer 163 may have a vapor barrier property that prevents the transmission of water vapor and a gas barrier property that prevents the transmission of gases such as oxygen gas. In addition, the other layer 163 may have a function of sufficiently increasing concealment so that the contents of the packaging container 101 cannot be seen, in order to increase consumer purchasing motivation. Therefore, examples of the other layer 163 include a gas barrier layer, a light-shielding layer, and the like.

[0035] The gas barrier layer may be a metal foil such as an aluminum foil, a vapor deposition layer, etc. The vapor deposition layer may be provided on the base layer or on the sealant layer. The vapor-deposited layer may be a metal vapor-deposited layer made of a vapor-deposited layer of a metal such as aluminum, or may be a transparent vapor-deposited layer made of a vapor-deposited layer of an inorganic oxide such as aluminum oxide or silicon oxide.

[0036] The gas barrier layer may also include a vapor deposition layer and an organic coating layer formed on the vapor deposition layer. The organic coating layer is formed by applying a barrier coating agent onto the vapor-deposited film and solidifying it. The barrier coating agent is composed of a metal alkoxide, a hydroxyl-containing water-soluble resin, a silane coupling agent (if necessary), a sol-gel catalyst, an acid, etc.

[0037] As the metal alkoxide, the general formula R1 n M(OR 2 ) m(wherein, in the formula, R1 and R2 represent an organic group having 1 to 8 carbon atoms, M represents a metal atom, n represents an integer of 0 or more, m represents an integer of 1 or more, and n+m represents the atomic valence of M), and examples of the metal atom represented by M of the metal alkoxide include silicon, zirconium, titanium, aluminum, and the like. For example, it is preferable to use an alkoxysilane in which M is Si.

[0038] The above alkoxysilane is, for example, one represented by the general formula Si(ORa)4 (wherein Ra represents a lower alkyl group). In the above, Ra may be a methyl group, an ethyl group, an n-propyl group, an n-butyl group, or the like. Specific examples of the above alkoxysilane include tetramethoxysilane Si(OCH3)4, tetraethoxysilane Si(OC2H5)4, tetrapropoxysilane Si(OC3H7)4, tetrabutoxysilane Si(OC4H9)4, and the like. The above alkoxides may be used in combination of two or more kinds.

[0039] Silane coupling agents having reactive groups such as vinyl, epoxy, methacryl, and amino groups can be used. In particular, organoalkoxysilanes having epoxy groups are suitable, and for example, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldimethoxysilane, γ-glycidoxypropyldimethylmethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, γ-glycidoxypropyldimethylethoxysilane, or β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane can be used. The above-mentioned silane coupling agents may be used alone or in combination of two or more.

[0040] In particular, the crosslink density of the cured film of the organic coating layer using bifunctional organic compounds such as γ-glycidoxypropylmethyldimethoxysilane and γ-glycidoxypropylmethyldiethoxysilane is lower than that of the system using trialkoxysilane. Therefore, the cured film has excellent gas barrier properties and hot water treatment resistance, while also being flexible and has excellent bending resistance, so that the gas barrier properties of the packaging material using the barrier film are not easily deteriorated even after the Gelbo flex test.

[0041] As the hydroxyl group-containing water-soluble resin, a polyvinyl alcohol resin or an ethylene-vinyl alcohol copolymer can be used alone, or a polyvinyl alcohol resin and an ethylene-vinyl alcohol copolymer can be used in combination.

[0042] The light-shielding layer can be, for example, a metal foil such as aluminum or a metal vapor deposition layer. The other layer 163 may be formed by stacking two or more of the above-mentioned functional layers.

[0043] The base layer 161 may also be made of paper. When the base layer 161 is made of paper, the design layer 162 may be provided on the outer surface of the base layer 161, which faces the outside of the container. The basis weight of the paper used for the base layer 161 is 30 g / m 2 The above materials can be suitably used. The basis weight of the paper used for the base layer 161 is 150 g / m 2 The following can be suitably used. The basis weight of the paper used for the base layer 161 is 130 g / m 2 The following can be more preferably used: The basis weight of the paper used for the base layer 161 is 100 g / m 2 The following can be more preferably used:

[0044] 3, in this embodiment, a bonding layer 165 is provided between the base material layer 161 on which the pattern layer 162 is provided and the base material layer 161 on which a gas barrier layer is provided as another layer 163, and between the base material layer 161 on which a gas barrier layer is provided as another layer 163 and the sealant layer 164. As the bonding layer 165, for example, an adhesive generally used in a known dry lamination method can be used, such as a polyvinyl acetate adhesive, a polyacrylic ester adhesive, a cyanoacrylate adhesive, an ethylene copolymer adhesive, a cellulose adhesive, a polyester adhesive, a polyamide adhesive, an amino resin adhesive, an epoxy adhesive, a polyurethane adhesive, or the like.

[0045] Alternatively, an adhesive resin layer generally used in the extrusion lamination method (sandwich lamination method) can be used as the bonding layer 165. As the thermoplastic resin usable for the adhesive resin layer, a polyethylene-based resin, a polypropylene-based resin, a cyclic polyolefin-based resin, or a copolymer resin, modified resin, or mixture (including alloy) containing these resins as main components can be used. Examples of polyolefin resins include low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), polypropylene (PP), ethylene-α-olefin copolymers polymerized using a metallocene catalyst, random or block copolymers of ethylene and polypropylene, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA), ethylene-ethyl acrylate copolymer (EEA), ethylene-methacrylic acid copolymer (EMAA), ethylene-methyl methacrylate copolymer (EMMA), ethylene-maleic acid copolymer, ionomer resins, and acid-modified polyolefin resins obtained by modifying the above-mentioned polyolefin resins with unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, and itaconic acid in order to improve adhesion between layers. In addition, resins obtained by graft-polymerizing or copolymerizing unsaturated carboxylic acids, unsaturated carboxylic anhydrides, and ester monomers with polyolefin resins can be used. These materials can be used alone or in combination of two or more. Examples of cyclic polyolefin resins that can be used include cyclic polyolefins such as ethylene-propylene copolymers, polymethylpentene, polybutene, and polynorbornene. These resins can be used alone or in combination of two or more. In this case, an anchor coat layer (AC layer) may be present between the substrate layer, and for example, an adhesive that is generally used in the dry lamination method known per se can be used, such as a polyvinyl acetate adhesive, a polyacrylic ester adhesive, a cyanoacrylate adhesive, an ethylene copolymer adhesive, a cellulose adhesive, a polyester adhesive, a polyamide adhesive, an amino resin adhesive, an epoxy adhesive, a polyurethane adhesive, etc.

[0046] A preferred embodiment of the laminated film 160 may have the following layer structure, in order from the base layer 161 side: (A) First base layer / sealant layer (B) First base layer / second base layer / sealant layer (C) First base layer / second base layer / third base layer / sealant layer Specific examples of the laminated film 160 include the following layer configurations, in order from the outer side of the container. (1) PET thickness 12 μm / inorganic oxide vapor deposition layer / organic coating layer / biaxially oriented polyamide film thickness 15 μm / CPP layer thickness 70 μm (2) Biaxially oriented polyamide film thickness 15 μm / PET thickness 12 μm / inorganic oxide vapor deposition layer / organic coating layer / CPP layer thickness 70 μm (3) PET thickness 12 μm / inorganic oxide vapor deposition layer / organic coating layer / PET thickness 12 μm / CPP layer thickness 70 μm (4) PET thickness 12 μm / inorganic oxide vapor deposition layer / organic coating layer / PET thickness 12 μm / PET thickness 12 μm / CPP layer thickness 70 μm (5) PET thickness 12 μm / PET thickness 12 μm / aluminum vapor deposition layer / LLDPE thickness 60 μm

[0047] The packaging container 101 of this embodiment is provided with a hook-and-loop fastener part 180 so that the opening OP can be resealed after it has been opened. Hook-and-loop fastener portion 180 extends in a direction connecting upper portion 131 and bottom portion 132, i.e., in a direction intersecting upper portion 131 and bottom portion 132, and is disposed on the surface of surface film 121. There are two hook-and-loop fastener portions 180 having a similar configuration, each located near side portion 133, and both are disposed with a gap between them in the left-right direction.

[0048] The hook-and-loop fastener section 180 can be made of a hook-and-loop fastener tape. The hook-and-loop fastener section 180 can be made by attaching the hook-and-loop fastener tape to the front side of the surface film 121 by heat compression or via an adhesive layer. The adhesive layer can be a hot melt adhesive or the like. The main component of the hot melt adhesive can be EVA, polyolefin, synthetic rubber, polyamide, polyester, polyurethane, or the like. Unlike conventional hook-and-loop fastener tapes with a male-female distinction, the hook-and-loop fastener tape constituting the hook-and-loop fastener section 180 is configured so that fastener surfaces (engagement surfaces) of the same configuration can be joined together. Therefore, the hook-and-loop fastener section 180 of the above configuration is configured so that one hook-and-loop fastener itself, that is, the hook-and-loop fastener section 180 itself can be folded back and joined. In addition, in this embodiment, the hook-and-loop fastener section 180 is illustrated as an example in which the entire fastener surface is a hook-and-loop fastener tape of the same configuration, but it may be configured using a hook-and-loop fastener that includes the same configuration but has a partially different shape. Note that the same configuration as mentioned here does not refer to completely equal shapes or dimensions, but also includes those that are partially missing or deformed, or have different dimensions. Here, the range in which the same configuration can be considered even if the dimensions are different is a range in which the difference in dimensions is within ±10%, and more preferably, a range in which the difference in dimensions is within ±5%. The dimensions referred to here refer to d3, d4, d5, and d6.

[0049] (Hook and loop fastener A) In this embodiment, three types of hook-and-loop fasteners, hook-and-loop fasteners A, B, and C, are exemplified as specific forms of the hook-and-loop fastener portion 180. FIG. 4 is a perspective view of a hook-and-loop fastener portion 180 in the form of hook-and-loop fastener A. FIG. FIG. 5 is a plan view of a hook-and-loop fastener portion 180 in the form of hook-and-loop fastener A. FIG. FIG. 6 is a cross-sectional view of a hook-and-loop fastener portion 180 in the form of hook-and-loop fastener A taken along the position of arrow BB in FIG. FIG. 7 is a cross-sectional view of a hook-and-loop fastener portion 180 in the form of hook-and-loop fastener A taken along the position of arrow CC in FIG. In addition, the direction indicated by the arrow MD in FIG. 4 and FIG. 5 is referred to as the MD (machine direction) direction, and the direction indicated by the arrow TD is referred to as the TD (transverse direction) direction. The hook-and-loop fastener portion 180 has a plurality of hook-shaped engaging elements 181 and a plurality of columnar engaging elements 182 arranged on a fastener surface where the two engage with each other while facing each other.

[0050] It is preferable that the main material of the hook-and-loop fastener portion 180 is polyethylene. Specifically, it is preferable that the polyethylene content is 50% by mass or more, more preferably 70% by mass or more, and even more preferably 85% by mass or more. Examples of polyethylene that can be used for the hook-and-loop fastener portion 180 include HDPE, MDPE, LDPE, and LLDPE, with LLDPE being preferred from the viewpoint of sealing properties. The material used for the hook-and-loop fastener portion 180 may contain multiple polyethylenes, or may partially contain other resins such as polypropylene, and other types of blends can be used from the viewpoints of cuttability, strength, and loop stiffness.

[0051] The hook-shaped engaging elements 181 have a pillar portion 181a and an engaging protrusion portion 181b, and are arranged at equal intervals in the MD direction. The pillar portion 181a is configured in a pillar shape rising approximately vertically from the fastener surface of the base portion 183. In this embodiment, the pillar portion 181a has a rectangular parallelepiped shape that is longer in the MD direction than in the TD direction. The engagement protrusion 181b is provided on the top of the column 181a and protrudes in a direction intersecting the rising direction of the column. In this embodiment, the engagement protrusion 181b protrudes in the TD direction, but may also protrude in the MD direction. The hook-like engaging elements 181 are arranged in multiple rows with the columnar engaging elements 182 sandwiched therebetween, and the positions of the hook-like engaging elements 181 in the MD direction in each row are intentionally irregularly shifted. When the hook-like engaging elements 181 are joined to the surface fastener, the hook-like engaging elements 181 can be freely inserted into and removed from the gaps between the other hook-like engaging elements 181, and joining is performed by the engaging action of the engaging protrusions 181b.

[0052] The columnar engaging elements 182 stand upright in a columnar shape from the fastener surface and are arranged at equal intervals in the MD direction. The columnar engaging elements 182 of this embodiment have a rectangular parallelepiped shape that is longer in the MD direction than in the TD direction. The columnar engaging elements 182 are arranged in multiple rows with the hook-shaped engaging elements 181 sandwiched therebetween, and the positions of the columnar engaging elements 182 in each row are intentionally irregularly shifted in the MD direction. When the hook-shaped engaging elements 181 are joined to the surface fastener, the hook-shaped engaging elements 181 can be freely inserted into and removed from the gaps between the other hook-shaped engaging elements 181, and joining is performed by the engaging action of the engaging protrusions 181b.

[0053] 8 is a diagram for explaining the dimensions of the hook-shaped engaging elements 181 and the columnar engaging elements 182 in the form of the hook-and-loop fastener A. FIG. 8 corresponds to an enlarged cross section of FIG. FIG. 9 is a diagram showing the dimensions d1 to d11 shown in FIG. 5 and FIG. In FIG. 9, the column of dimensional examples shows actual measured values ​​of the hook-and-loop fastener portion 180, and the column of preferred dimensional ranges shows preferred dimensional ranges that can be suitably used in the present invention.

[0054] The preferred dimensions of each part in the form of the hook-and-loop fastener A will be summarized below. The height d1 of the hook-shaped engaging element 181 is preferably 300 μm or more, and the height d1 of the hook-shaped engaging element 181 is preferably 700 μm or less. The height d1 of the columnar engaging element 182 is preferably 300 μm or more, and the height d1 of the columnar engaging element 182 is preferably 700 μm or less. The MD length d2 of the hook-shaped engaging element 181 is preferably 500 μm or more. Also, the MD length d2 of the hook-shaped engaging element 181 is preferably 700 μm or less. If it is shorter than the above range, the fitting strength will be weak, and if it is longer, the fitting strength will be too strong and the risk of the protrusion falling off will increase. The MD length d2 of the columnar engaging elements 182 is preferably 100 μm or more, and the MD length d2 of the columnar engaging elements 182 is preferably 300 μm or less.

[0055] The TD width d3 of the pillar portion 181a of the hook-shaped engaging element 181 is preferably 100 μm or more, and the TD width d3 of the pillar portion 181a of the hook-shaped engaging element 181 is preferably 350 μm or less. The TD width d3 of the columnar engaging elements 182 is preferably 100 μm or more, and the TD width d3 of the columnar engaging elements 182 is preferably 350 μm or less. The overall width d4 in the TD direction of the hook-shaped engaging element 181 is preferably 300 μm or more, and the width d4 in the TD direction of the hook-shaped engaging element 181 is preferably 950 μm or less.

[0056] The TD-direction protruding width d5 ​​of the engaging protrusion 181b is preferably 100 μm or more. Also, the TD-direction protruding width d5 ​​of the engaging protrusion 181b is preferably 300 μm or less. If it is narrower than the above range, the fitting strength is weakened, and if it is wider, the risk of the protrusion falling off increases. The return angle d6 of the engaging protrusion 181b is preferably 45° or more. Also, the return angle d6 of the engaging protrusion 181b is preferably 90° or less. If it is too small, the fitting strength will be too strong and it will be easy to fall off, and if it is too large, it will not be possible to fit together. Note that Fig. 8(a) shows the case where d6=90° shown in Figs. 4 to 7, and Fig. 8(b) shows a modified form where d6 is less than 90°.

[0057] The total thickness d7 of the hook-and-loop fastener tape used in the hook-and-loop fastener portion 180 is desirably 400 μm or more. Also, the total thickness d7 of the hook-and-loop fastener tape is desirably 700 μm or less. The MD direction interval d8 of the hook-shaped engaging elements 181 is preferably 100 μm or more, and the MD direction width interval d8 of the hook-shaped engaging elements 181 is preferably 500 μm or less. The MD direction interval d8 of the columnar engaging elements 182 is preferably 100 μm or more, and the MD direction width interval d8 of the columnar engaging elements 182 is preferably 500 μm or less.

[0058] The TD directional interval d9 of the hook-shaped engaging elements 181 and the TD directional interval d9 of the columnar engaging elements 182 are both desirably 500 μm or more. Also, the TD directional interval d9 of the hook-shaped engaging elements 181 and the TD directional interval d9 of the columnar engaging elements 182 are both desirably 1000 μm or less. This is because if the TD directional interval d9 of the hook-shaped engaging elements 181 and the TD directional interval d9 of the columnar engaging elements 182 are smaller than the above range, the elements become dense, and if larger, the elements become sparse, making it difficult to fit them together.

[0059] The thickness d10 of the base 183 is preferably 50 μm or more, and more preferably 100 μm or more. The thickness d10 of the base 183 is preferably 500 μm or less, more preferably 400 μm or less, and even more preferably 300 μm or less. If the thickness d10 of the base 183 is thin, the amount of resin is small and the adhesion (bonding) of the hook-and-loop fastener is not achieved, and if the thickness d10 of the base 183 is thick, the loop stiffness becomes too strong. Also, the TD width of the hook-and-loop fastener part 180 is preferably 5 mm or more. Also, the TD width of the hook-and-loop fastener part 180 is preferably 20 mm or less. If it is narrower than the above range, the amount of resin is too small to achieve adhesion (bonding) as a hook-and-loop fastener, and if it is wider than the above range, the loop stiffness becomes too strong.

[0060] The TD direction distance d11 between the pillar portion 181a of the hook-shaped engaging element 181 and the pillar-shaped engaging element 182 is preferably 300 μm or more. Also, the TD direction distance d11 between the pillar portion 181a of the hook-shaped engaging element 181 and the pillar-shaped engaging element 182 is preferably 500 μm or less. If the TD direction distance d11 between the pillar portion 181a of the hook-shaped engaging element 181 and the pillar-shaped engaging element 182 is smaller than the above range, the elements become dense, and if it is larger, the elements become sparse, making it difficult to fit them together. The hook-and-loop fastener tape having the above-mentioned hook-shaped engaging elements and column-shaped engaging elements will also be referred to as hook-and-loop fastener A.

[0061] (Hook and loop fasteners B and C) The previously explained hook-and-loop fastener A has hook-shaped engaging elements and columnar engaging elements, but we have prepared a hook-and-loop fastener tape that does not have columnar engaging elements and is entirely made up of hook-shaped engaging elements (a hook-and-loop fastener tape having only hook-shaped engaging elements). Furthermore, for this hook-and-loop fastener tape having only hook-shaped engaging elements, we have prepared two types: one made mainly of PE (hereinafter also referred to as hook-and-loop fastener B) and one made mainly of PP (hereinafter also referred to as hook-and-loop fastener C). FIG. 10 is a perspective view of a hook-and-loop fastener portion 180 of hook-and-loop fasteners B and C. FIG. FIG. 11 is a plan view of the hook-and-loop fastener portion 180 in the hook-and-loop fastener B and C forms. FIG. 12 is a cross-sectional view of a hook-and-loop fastener portion 180 in the form of hook-and-loop fasteners B and C taken along the position of the arrow GG in FIG. FIG. 13 is an enlarged cross-sectional view of a hook-and-loop fastener portion 180 of the hook-and-loop fasteners B and C taken along the position of the arrow HH in FIG. FIG. 14 is a diagram showing the dimensions d1 to d10 shown in FIG. 11 and FIG. In FIG. 14, the column of dimensional examples shows actual measured values ​​of the hook-and-loop fastener tape, and the column of preferred dimensional ranges shows preferred dimensional ranges that can be suitably used in the present invention.

[0062] The preferred dimensions of each part in the hook-and-loop fasteners B and C are summarized below. The height d1 of the hook-shaped engaging element 181 is preferably 300 μm or more, and the height d1 of the hook-shaped engaging element 181 is preferably 700 μm or less. The MD length d2 of the hook-shaped engaging element 181 is preferably 500 μm or more. Also, the MD length d2 of the hook-shaped engaging element 181 is preferably 700 μm or less. If it is shorter than the above range, the fitting strength will be weak, and if it is longer, the fitting strength will be too strong and the risk of the protrusion falling off will increase.

[0063] The TD width d3 of the pillar portion 181a of the hook-shaped engaging element 181 is preferably 100 μm or more, and the TD width d3 of the pillar portion 181a of the hook-shaped engaging element 181 is preferably 350 μm or less. The overall width d4 in the TD direction of the hook-shaped engaging element 181 is preferably 300 μm or more, and the width d4 in the TD direction of the hook-shaped engaging element 181 is preferably 950 μm or less.

[0064] The TD-direction protruding width d5 ​​of the engaging protrusion 181b is preferably 100 μm or more. Also, the TD-direction protruding width d5 ​​of the engaging protrusion 181b is preferably 300 μm or less. If it is narrower than the above range, the fitting strength is weakened, and if it is wider, the risk of the protrusion falling off increases. The return angle d6 of the engaging protrusion 181b is preferably 45° or more. Also, the return angle d6 of the engaging protrusion 181b is preferably 90° or less. If it is too small, the fitting strength will be too strong and the protrusion will be prone to falling off, and if it is too large, the protrusion will not be able to fit. Note that Fig. 13(a) shows the case where d6=90° shown in Figs. 10 to 12, and Fig. 13(b) shows a modified form where d6 is less than 90°.

[0065] The total thickness d7 of the hook-and-loop fastener tape is preferably 400 μm or more, and 1200 μm or less. The MD direction interval d8 of the hook-shaped engaging elements 181 is preferably 100 μm or more, and the MD direction width interval d8 of the hook-shaped engaging elements 181 is preferably 500 μm or less.

[0066] The TD direction interval d9 of the hook-shaped engaging elements 181 is preferably 250 μm or more. Also, the TD direction interval d9 of the hook-shaped engaging elements 181 is preferably 500 μm or less. If the TD direction interval d9 of the hook-shaped engaging elements 181 is smaller than the above range, the elements become dense, and if it is larger, the elements become sparse, making it difficult to fit them together.

[0067] The thickness d10 of the base 183 is preferably 50 μm or more, and more preferably 100 μm or more. The thickness d10 of the base 183 is preferably 500 μm or less, more preferably 400 μm or less, and even more preferably 300 μm or less. If the thickness d10 of the base 183 is thin, the amount of resin is small and the adhesion (bonding) of the hook-and-loop fastener is not achieved, and if the thickness d10 of the base 183 is thick, the loop stiffness becomes too strong. Also, the TD width of the hook-and-loop fastener part 180 is preferably 5 mm or more. Also, the TD width of the hook-and-loop fastener part 180 is preferably 20 mm or less. If it is narrower than the above range, the amount of resin is too small to achieve adhesion (bonding) as a hook-and-loop fastener, and if it is wider than the above range, the loop stiffness becomes too strong.

[0068] The packaging container 101 having the above-described configuration is shipped with the entire periphery sealed, for example, with contents (not shown) accommodated in the accommodation portion 102. FIG. 15 is a diagram showing the packaging container 101 in an opened state. A user who has purchased the product can use the notch 107 to separate the upper seal portion 141 from the container body portion 106, open the packaging container 101 to form an opening OP, and remove the contents. When the packaging container 101 is opened, the upper part of the storage portion 102 is opened.

[0069] FIG. 16 is a diagram showing the packaging container 101 in a resealed state. Fig. 17 is a diagram showing a joined state of the hook-and-loop fastener part 180. Note that Fig. 17 illustrates the case of hook-and-loop fastener A, but in the case of hook-and-loop fasteners B and C, hook-shaped engaging elements are arranged instead of columnar engaging elements. When it is desired to open the packaging container 101, take out a part of the contents, and store the rest, it is possible to fold the packaging container 101 together with the hook-and-loop fastener part 180, and reseal the packaging container 101 using the hook-and-loop fastener part 180. At this time, the hook-like engaging element 181 on one side is inserted into the gap between the hook-like engaging element 181 on the other side or the columnar engaging element 182, and the engaging elements come into contact with each other, thereby fitting together and engaging detachably, and the fastener surfaces of the hook-and-loop fastener part 180 are joined with an appropriate strength. Moreover, by peeling off the joined hook-and-loop fastener part 180, the joining between the two can be easily released, and the container can be reopened. In a conventional resealable packaging container using zipper tape, it is necessary to fit male and female engaging parts together, so that it is impossible to join them even if they are used by extending them in the vertical direction like the hook-and-loop fastener part 180 of this embodiment. However, in the packaging container 101 of this embodiment, the hook-and-loop fastener part 180 having the same shape of fastener surface without distinction between male and female is used, so that the resealing operation can be performed easily and reliably.

[0070] (About the loop stiffness of the hook-and-loop fastener part 180) In the configuration of the above embodiment, the packaging container 101 is provided with the hook-and-loop fastener portion 180, which allows it to be resealed. When resealing, the hook-and-loop fastener portion 180 is folded back. Since the hook-and-loop fastener tape used for the hook-and-loop fastener portion 180 in the above embodiment is a resin molded product, if the configuration is not appropriate, the resealing operation may be difficult, or even if the container is resealed, the force of the hook-and-loop fastener portion 180 itself trying to return to its original shape may cause the connection of the hook-and-loop fastener portion 180 to be released. Therefore, the hook-and-loop fastener tape used in the hook-and-loop fastener portion 180 of the packaging container 101 of the present invention is configured so that its bending rigidity (flexibility) is appropriately weak by setting the loop stiffness to an appropriate value.

[0071] Loop stiffness is a parameter that indicates the stiffness of a film such as a stretched plastic film. A method for measuring loop stiffness will be described below with reference to Figs. 18 to 23. Note that the measurement method described below will be used to measure the hook-and-loop fastener tape used in the hook-and-loop fastener portion 180 of the present invention.

[0072] FIG. 18 is a plan view showing the test piece 80 and the loop stiffness measuring instrument 85, and FIG. 19 is a cross-sectional view of the test piece 80 and the loop stiffness measuring instrument 85 of FIG. 18 taken along the line GG. The test piece 80 is a rectangular hook-and-loop fastener tape having a long side and a short side. In the present application, the length L1 of the long side of the test piece 80 is set to 150 mm, and the length L2 of the short side is set to the width of the hook-and-loop fastener tape (for example, 9.5 mm). As the loop stiffness measuring instrument 85, for example, No. 581 Loop Stiffness Tester (registered trademark) LOOP STIFFNESS TESTER DA type manufactured by Toyo Seiki Seisakusho Co., Ltd. can be used. The length L1 of the long side of the test piece 80 can be adjusted as long as the test piece 80 can be gripped by a pair of chuck parts 86 described later.

[0073] The loop stiffness measuring device 85 has a pair of chuck portions 86 for gripping a pair of ends in the long side direction of the test piece 80, and a support member 87 for supporting the chuck portions 86. The chuck portions 86 include a first chuck 861 and a second chuck 862. In the state shown in FIG. 18 and FIG. 19, the test piece 80 is placed on the pair of first chucks 861, and the second chuck 862 does not yet grip the test piece 80 between the first chuck 861 and the second chuck 862. As described later, during measurement, the test piece 80 is gripped between the first chuck 861 and the second chuck 862 of the chuck portions 86. The second chuck 862 may be connected to the first chuck 861 via a hinge mechanism.

[0074] A method for measuring the loop stiffness of the test piece 80 using the loop stiffness measuring device 85 will be described. First, as shown in FIG. 18 and FIG. 19, the test piece 80 is placed on the first chuck 861 of a pair of chuck parts 86 arranged with a gap L3 therebetween. In the present application, the gap L3 is set so that the length of the loop part 81 (hereinafter also referred to as the loop length) described later is 60 mm. The test piece 80 includes an inner surface 80x located on the first chuck 861 side and an outer surface 80y located on the opposite side of the inner surface 80x. The inner surface 80x and the outer surface 80y of the test piece 80 coincide with the inner surface side (the side where the engaging element is provided) and the outer surface side of the hook-and-loop fastener tape. When the loop part 81 described later is formed in the test piece 80, the inner surface 80x is located inside the loop part 81, and the outer surface 80y is located outside the loop part 81. 20, the second chuck 862 is placed on the test piece 80 so as to grip the end of the test piece 80 in the long side direction between the first chuck 861 and the second chuck 862. As shown in FIG.

[0075] Next, as shown in FIG. 21, at least one of the pair of chucks 86 is slid on the support member 87 in a direction in which the distance between the pair of chucks 86 is reduced. This allows the loop portion 81 to be formed in the test piece 80. The test piece 80 shown in FIG. 21 has a loop portion 81, a pair of intermediate portions 82, and a pair of fixing portions 83. The pair of fixing portions 83 are portions of the test piece 80 that are gripped by the pair of chucks 86. The pair of intermediate portions 82 are portions of the test piece 80 that are located between the loop portion 81 and the pair of intermediate portions 82. As shown in FIG. 21, the chuck portion 86 is slid on the support member 87 until the inner surfaces 80x of the pair of intermediate portions 82 come into contact with each other. This allows the loop portion 81 having a loop length of 60 mm to be formed. The loop length of the loop portion 81 is the length of the test piece 80 between position P1 where the surface of one second chuck 862 on the loop portion 81 side intersects with the test piece 80, and position P2 where the surface of the other second chuck 862 on the loop portion 81 side intersects with the test piece 80. When the thickness of the test piece 80 is ignored, the above-mentioned interval L3 is a value obtained by adding 2×t to the length of the loop portion 81, where t is the thickness of the second chuck 862 of the chuck portion 86.

[0076] Then, as shown in FIG. 22, the posture of the chuck portion 86 is adjusted so that the protruding direction Y of the loop portion 81 relative to the chuck portion 86 is vertical. For example, the posture of the chuck portion 86 supported by the support member 87 is adjusted by moving the support member 87 so that the normal direction of the support member 87 is horizontal. In the example shown in FIG. 22, the protruding direction Y of the loop portion 81 coincides with the thickness direction of the chuck portion. Also, a load cell 88 is prepared at a position separated by a distance Z1 from the second chuck 862 in the protruding direction Y of the loop portion 81. In this application, the distance Z1 is set to 50 mm. Next, the load cell 88 is moved at a speed V by a distance Z2 shown in FIG. 22 toward the loop portion 81 of the test piece 80. The distance Z2 is set so that the load cell 88 contacts the loop portion 81 and then pushes the loop portion 81 toward the chuck portion 86 side, as shown in FIG. 22 and FIG. 23. In the present application, the distance Z2 is set to 40 mm. In this case, the distance Z3 between the load cell 88 and the second chuck 862 of the chuck portion 86 when the load cell 88 is pressing the loop portion 81 toward the chuck portion 86 is set to 10 mm. The speed V at which the load cell 88 is moved is set to 3.3 mm / s, and the pressing holding time is set to 3 s.

[0077] 23, the load cell 88 is moved by a distance Z2 toward the chuck portion 86, and in a state in which the load cell 88 is pressing into the loop portion 81 of the test piece 80, the value of the load applied to the load cell 88 from the loop portion 81 becomes stable, and then the value of the load is recorded. The value of the load thus obtained is used as the loop stiffness of the film constituting the test piece 80. In this application, unless otherwise specified, the environment during the measurement of the loop stiffness is a temperature of 23°C and a relative humidity of 50%.

[0078] (Examples and Comparative Examples) A plurality of types of packaging containers 101 described in the above embodiment were produced as examples, and further, comparative examples were produced, and the resealing operation was evaluated. FIG. 24 shows the results of evaluating the ease of resealing by creating samples of several types of packaging containers. 24, three types of hook-and-loop fastener tapes and zipper members (zipper tapes) were combined with the packaging container 101 of the above embodiment to produce three examples and one comparative example. The zipper member is of a conventional type in which a convex engaging portion and a concave engaging portion, which extend in one direction with the same cross-sectional shape, are fitted together.

[0079] <Example 1> A laminate was dry-laminated from 12 μm thick PET, 12 μm thick aluminum-vapor-deposited PET, and 60 μm thick LLDPE, and a hook-and-loop fastener B having a width of 13 mm in the short direction was used as the hook-and-loop fastener section 180 to form a four-sided bag in the form of the packaging container 101 of the embodiment, to produce Example 1.

[0080] <Example 2> A laminate was dry-laminated from 12 μm thick PET, 12 μm thick aluminum-vapor-deposited PET, and 60 μm thick LLDPE, and a hook-and-loop fastener C having a width of 13 mm in the short direction was used as the hook-and-loop fastener section 180 to form a four-sided bag in the form of the packaging container 101 of the embodiment, producing Example 2.

[0081] <Example 3> Example 2 was produced by dry laminating 12 μm thick PET, 12 μm thick aluminum vapor deposition PET, and 60 μm thick LLDPE to form a four-sided bag in the form of the packaging container 101 of the embodiment using hook-and-loop fastener A with a width of 9.5 mm in the short direction as the hook-and-loop fastener section 180.

[0082] <Comparative Example 1> A laminate made by dry laminating 12 μm thick PET, 12 μm thick aluminum-vapor-deposited PET, and 60 μm thick LLDPE was formed into a four-sided bag in the form of the packaging container 101 of the embodiment using a zipper member at a position corresponding to the hook-and-loop fastener portion 180 to produce Comparative Example 1.

[0083] In Comparative Example 1, in which a chuck member was used, the convex engagement portion and the concave engagement portion were fitted together to enable joining, so even if the part was folded back it could not be joined, and the evaluation of whether or not it could be joined was given an X. In contrast, for Examples 1 to 3, which used hook-and-loop fasteners having hook-shaped engaging elements 181 regardless of gender, they could be folded back and joined, and were resealable, so the evaluation of whether they could be joined was rated as good. More specifically, in Example 1, the joining work could be carried out normally, and therefore the ease of joining was rated as "good." In Example 2, the loop stiffness was 6054 mN under the conditions of a loop length of 60 mm, a pressing speed of 3.3 mm / s, and a pressing hold time of 3 s, which made the joining work somewhat difficult; however, joining was possible, so the ease of joining was rated as good. In Example 3, the loop stiffness of the hook-and-loop fastener portion alone was a very low value of 87 mN under the conditions of a loop length of 60 mm, a pushing speed of 3.3 mm / s, and a pushing hold time of 3 s, and since it could be easily bent and joined very easily, the ease of joining was rated as ◎.

[0084] From the above results, it can be said that the loop stiffness of the hook-and-loop fastener portion alone used in hook-and-loop fastener portion 180 can be used for a resealable packaging container if it is 7000 mN or less under the conditions of a loop length of 60 mm, a pushing speed of 3.3 mm / s, and a pushing hold time of 3 s. Moreover, the loop stiffness of the hook-and-loop fastener portion alone used in hook-and-loop fastener portion 180 is more preferably 5000 mN or less, and even more preferably 1500 mN or less, under the conditions of a loop length of 60 mm, a pushing speed of 3.3 mm / s, and a pushing hold time of 3 s.

[0085] (Variations) The present invention is not limited to the above-described embodiment, and various modifications and variations are possible, and these are also within the scope of the present invention.

[0086] (1) In the embodiment, the specific shape and material of the hook-and-loop fastener can be changed as appropriate. For example, the hook-shaped engaging elements may have a plurality of different shapes, and the arrangement and ratio of the hook-shaped engaging elements and the columnar engaging elements can also be changed as appropriate.

[0087] (2) In the embodiment, specific shapes of packaging containers are exemplified, but the hook-and-loop fastener tape of the present invention may be provided on other known packaging containers.

[0088] The embodiments and modifications may be used in appropriate combination, but detailed description thereof will be omitted. The present invention is not limited to the embodiments described above. [Explanation of symbols]

[0089] 101 Packaging containers 102 Storage unit 106 Container body 107 Notch 121 Surface Film 122 Back film 131 Top 132 Bottom 133 Side 141 Upper seal part 142 Bottom seal 143 Side seal 160 Laminated Film 161 Base material layer 162 Picture layer 163 Middle Class 164 Sealant Layer 165 Bonding layer 180 Hook and loop fastener section 181 Hook-shaped engagement element 181a Column 181b Engagement protrusion 182 Pillar-shaped engagement element 183 Base

Claims

1. A packaging container having at least a first edge and a second edge opposite to the first edge, The packaging material includes a first packaging material portion that forms a front surface and a second packaging material portion that forms a back surface, A hook-and-loop fastener portion is provided extending in a direction connecting the first edge and the second edge, A packaging container, wherein the hook-and-loop fastener portion includes a hook-shaped engaging element and is arranged on only one of the front surface of the first packaging material portion and the back surface of the second packaging material portion.

2. The packaging container according to claim 1, A plurality of the hook-and-loop fastener portions are arranged in a direction intersecting a direction in which the hook-and-loop fastener portions extend; A packaging container characterized by:

3. The packaging container according to claim 1 or 2, The loop stiffness of the hook-and-loop fastener portion alone is 7000 mN or less under the conditions of a loop length of 60 mm, a pushing speed of 3.3 mm / s, and a pushing holding time of 3 s. A packaging container characterized by:

4. In the packaging container according to any one of claims 1 to 3, the hook-and-loop fastener portion further includes a plurality of columnar engaging elements arranged upright from the fastener surface; A packaging container characterized by:

5. In the packaging container according to any one of claims 1 to 4, The packaging material has a first packaging material part and a second packaging material part that are constituted by a laminate film having at least a base layer and a sealant layer, A storage section capable of storing contents; A seal portion formed around the housing portion; A sealing portion is provided to be sealed after the content is accommodated therein; A packaging container characterized by:

Images