Paper container with flap label

Abstract

The present invention provides a paper container with a flap label that prevents liquid from seeping into the paper substrate when the contents include liquid, and prevents peeling or tearing of the paper substrate around the opening. [Solution] The paper container with a flap label comprises a paper container composed of a paper substrate 6 having an opening 30 and an inner layer film 7 backing the region of the paper substrate including the opening, and a flap label 2. The inner layer film has a first opening region where a release portion is provided. The flap label includes a lower substrate 3 attached to the region of the paper substrate including the opening, and an upper substrate 4 attached to the lower substrate. In a plan view, the lower substrate has a second opening region located inside the opening of the paper substrate, where an opening or a release portion that peels off upon initial opening to form an opening is provided. The upper substrate is repeatedly and detachably attached to the lower substrate so as to close the second opening region. In a plan view, the lower substrate is attached to the inner layer film inside the opening of the paper substrate.

Description

Technical Field

[0001] The present invention relates to a paper container with a flap label.

Background Art

[0002] A flap label is known, which is a label having an openable and closable flap-shaped lid and is attached so as to cover the outlet of a container storing contents. Patent Document 1 discloses a container with a flap label.

[0003] As an openable and closable container, there is a molded container made of resin, but paper containers are being considered in order to reduce the amount of plastic used. In Patent Document 1 as well, a paper material (waterproof paper) is used for a part of the material constituting the container.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, for example, in a paper container 5 in which an inner layer film 7 is lined on a paper base material 6 without water resistance such as cardboard to impart internal water resistance, an opening 60, 70 is provided and a flap label 2 is attached, and when storing contents 8 containing liquid such as a wet sheet or a face mask, since the end of the paper base material 6 is exposed inside the container at the cut of the opening 60, there is a possibility that the liquid infiltrates the paper base material 6 (see FIG. 19). When the liquid infiltrates the paper base material 6, peeling between the paper base material 6 and the inner layer film 7 or tearing of the paper base material 6 may occur around the opening 60, and there is a risk that the sealing performance of the container may be impaired. Furthermore, even if the contents do not contain liquid and the container is not lined with an inner film, when removing the contents, the contents may rub against the cut edge of the opening, causing peeling or tearing at the exposed edge of the paper substrate 6, potentially leading to deformation of the container opening.

[0006] The object of the present invention is to prevent liquid from seeping into the paper substrate or peeling or tearing of the paper substrate around the opening in a paper container with a flap label attached to the opening when the contents contain liquid. [Means for solving the problem]

[0007] The paper container with a flap label of the present invention is A paper container comprising a paper substrate having an opening, and an inner layer film backing the region of the paper substrate including the opening, A flap label attached to the outside of the surface of the paper container having the opening, It is equipped with. The inner layer film has a first opening region located inward from the opening of the paper substrate in a plan view, where an opening or a peeling portion is provided that is peeled off upon initial opening to form an opening. The flap label includes a lower substrate attached to the area of ​​the paper substrate including the opening, and an upper substrate attached to the lower substrate. The lower substrate has a second opening region located inward from the opening of the paper substrate in a plan view, where an opening or a peeling portion is provided that peels off upon initial opening to form an opening. The upper substrate is repeatedly and detachably attached to the lower substrate so as to close the second opening region. In a plan view, the lower substrate is attached to the inner layer film on the inside of the opening in the paper substrate. [Effects of the Invention]

[0008] According to the present invention, in a paper container with a flap label attached to the opening, it is possible to prevent liquid from seeping into the paper substrate when the contents contain liquid, and to prevent peeling or tearing of the paper substrate around the opening. [Brief explanation of the drawing]

[0009] [Figure 1] This is a perspective view showing a paper container with a flap label according to Embodiment 1. [Figure 2] Figure 1 is an exploded perspective view of a paper container with a flap label. [Figure 3] Figure 1 is a perspective view showing the open state of a paper container with a flap label. [Figure 4] Figure 1 is a top view of a paper container with a flap label. [Figure 5] This is a partial cross-sectional view showing cross-section AA of a paper container with a flap label, as shown in Figure 1. [Figure 6] This is a perspective view showing a paper container with a flap label according to Embodiment 2. [Figure 7] Figure 6 is an exploded perspective view of a paper container with a flap label. [Figure 8] Figure 6 is a perspective view showing the open state of a paper container with a flap label. [Figure 9] Figure 6 is a partial cross-sectional view showing cross-section AA of a paper container with a flap label. [Figure 10] This is a perspective view showing a paper container with a flap label according to Embodiment 3. [Figure 11] Figure 10 is an exploded perspective view of a paper container with a flap label. [Figure 12] Figure 10 is a perspective view showing the open state of a paper container with a flap label. [Figure 13] Figure 10 is a partial cross-sectional view showing cross-section AA of a paper container with a flap label. [Figure 14] Figure 10 is a top view showing the non-adhesive portion of a paper container with a flap label, viewed through the glass. [Figure 15]It is a partial cross-sectional view similar to FIG. 13 showing a modification of the paper container with a flap label according to Embodiment 3. [Figure 16] It is a top view showing a non-adhesive portion in a see-through manner in the paper container with a flap label shown in FIG. 15. [Figure 17] It is a schematic top view showing a modification of the opening region of the lower base material in the paper container with a flap label according to the embodiment. [Figure 18] It is a schematic cross-sectional view showing an example of the paper container in the paper container with a flap label according to the embodiment. [Figure 19] It is a schematic cross-sectional view for explaining the problems of the paper container with a flap label.

Modes for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same parts or common parts are denoted by the same reference numerals. Also, each figure represents a schematic configuration, and dimensions and the like of each part are enlarged or reduced. In this specification, "plan view" means a plan view seen from a direction perpendicular to the opening surface of the opening 60 of the paper base material 6.

[0011] <Embodiment 1> Referring to FIGS. 1 to 5, the paper container 1 with a flap label according to Embodiment 1 includes a paper container 5 and a flap label 2.

[0012] (Paper container) The paper container 5 is composed of a paper base material 6 and an inner layer film 7.

[0013] The inner layer film 7 is lined in the region including the opening 60 of the paper base material 6. Note that the inner layer film 7 only needs to be lined (inner-lined) in the region including the opening 60 of the paper base material 6, and may be lined on the entire inner surface of the paper base material 6 processed into a container shape. For example, like a region similar to the lower base material 3 in plan view, it may be lined only in a part of the region including the opening 60 of the paper base material 6.

[0014] The paper container 5 is not particularly limited as long as it is a container that includes a paper base material 6, but examples include boxes, bags, etc., that can hold the contents of a product.

[0015] The paper container 5 holds its contents. The contents stored inside the paper container 5 are not particularly limited, but examples include bundles of wet wipes, face masks, etc., made by impregnating paper, woven fabric, nonwoven fabric, etc. with cosmetics, medicines, etc., which are laminated so that each sheet can be freely dispensed. When storing products that contain liquids and need to be prevented from evaporating the liquid, or contents that require airtight sealing, such as confectionery and food products, it is preferable that the entire inner surface of the paper base material 6 processed into a container shape is lined. Furthermore, when storing contents that do not require airtightness, the inner layer film 7 does not need to be backed on the inner surface of other parts of the paper substrate 6, as long as it is backed on the inner surface around the opening 60 of the paper substrate 6.

[0016] The paper substrate 6 has an opening 60. It is preferable that this opening 60 is formed before the inner layer film 7 is backed on. The paper container 5 has an opening for removing the contents, and the opening area of ​​the opening is smaller than the opening 60 of the paper substrate 6. The opening is formed by the opening 30 in the second opening region 3a, or the opening 70 in the first opening region 7a, which will be described later.

[0017] The material of the paper substrate 6 is a pulp-containing material. The pulp content in the paper substrate is preferably 80% by mass or more, and more preferably 90% by mass or more. The basis weight of the paper substrate is, for example, 350 to 450 g / m². 2 That is the case.

[0018] The inner layer film 7 has a first opening region 7a located inside the opening 60 of the paper substrate 6 in a plan view. The first opening region 7a is the region in which the opening 70 or the peel-off portion 70P (see Figure 9), which is peeled off to form an opening when the film is first opened, is provided in a plan view.

[0019] The material of the inner layer film 7 is not particularly limited, but it is preferably a thin and flexible film material that can be used to back the shape of the paper container 5 formed by the paper substrate 6. Furthermore, if the contents contain a liquid, the material of the inner layer film 7 is preferably a material with high sealing properties, such as liquid tightness and airtightness. Examples of materials with high sealing properties include films made of ethylene-vinyl alcohol copolymer (EVOH) resin. The inner layer film 7 may be a multilayer film including a barrier layer made of such a highly sealing film.

[0020] For example, in the paper container 5 shown in Figure 18, the inner layer film 7 is heat-sealed to the sealing film 71 at the portion backed by the flange portion 6a of the paper substrate 6, thereby creating a sealed paper container 5. For this reason, it is preferable that the inner layer film 7 is a film that can be heat-sealed to the sealing film 71. Examples of heat-sealable films include polyethylene (PE) films. To make the inner layer film 7 a highly airtight and heat-sealable film, for example, a multilayer film can be used as the inner layer film 7, which includes a barrier layer made of a highly airtight film and a seal layer made of a heat-sealable film provided on one or both sides of the barrier layer. The thickness of the multilayer film with seal layers on both sides of the barrier layer is, for example, 100 to 150 μm.

[0021] (Flap label) The flap label 2 is attached to the outside of the side of the paper substrate 6 that has the opening 60 relative to the paper container 5.

[0022] The flap label 2 of this embodiment consists of a lower base material 3 and an upper base material 4. The lower base material 3 is attached to the side of the paper base material 6 that has an opening 60. The upper base material 4 is attached to the side of the lower base material 3 opposite to the paper base material 6.

[0023] The lower substrate 3 is attached to the paper substrate 6 in at least a portion of the area around the opening 60 of the paper substrate 6. The lower substrate 3 is firmly attached to the paper container 5 so that it remains attached to the paper container 5 even when the upper substrate 4 is peeled off.

[0024] The lower substrate 3 has a second opening region 3a located inside the opening 60 of the paper substrate 6 in a plan view. The second opening region 3a is the region where the opening 30 or a peeling portion 30P (see Figure 9) that is peeled off to form an opening when the substrate is first opened is provided. The upper base material 4 is repeatedly and detachably attached to the lower base material 3 so as to close the second opening region 3a. In other words, the upper base material 4 is repeatedly and detachably attached to the lower base material 3, which is attached to the paper container 5, so as to close the opening of the paper container 5.

[0025] Although not shown in Figure 5, in this embodiment, the lower substrate 3 has an adhesive layer (first adhesive layer) on the paper substrate 6 and inner film 7 side, and the upper substrate 4 has an adhesive layer (second adhesive layer) on the lower substrate 3 side. For example, the second adhesive layer of the upper substrate 4 is a weakly adhesive layer that can be repeatedly attached and detached, while the adhesive layer of the lower substrate 3 is a strong adhesive layer with higher adhesive strength than the weakly adhesive layer. In this case, the lower substrate 3 is firmly attached to the paper substrate 6 and firmly attached to the inner layer film 7 inside the opening 60 of the paper substrate 6 in a plan view. This prevents the lower substrate 3 from peeling off the paper container 5 when attaching or detaching the upper substrate 4, and allows for repeated attachment and detachment of the upper substrate 4.

[0026] In this embodiment, the lower substrate 3 is attached to the inner layer film 7 in the area inside the opening 60 of the paper substrate 6 in a plan view (see Figure 5). In Figures 5, 9, 13, and 15, which are partial cross-sectional views of the paper container with a flap label, (a) shows the state before opening and (b) shows the state after opening.

[0027] Thus, in the paper container 1 with a flap label of this embodiment, the opening regions 3a and 7a of the inner film 7 and the lower base material 3 are smaller than the opening 60 of the paper base material 6, and are arranged so that, in a top view, their entirety is contained within the opening 60 of the paper base material 6. In other words, the inner film 7 and the lower base material 3 extend further inward than the paper base material 6 beyond the opening 60. Because the inner film 7 and the lower base material 3 are adhered to each other, the paper base material 6 is protected from being exposed at the cut edge of the opening 60. Therefore, the conventional problems caused by the exposure of the paper substrate 6 at the cut edge of the opening 60 (see Figure 19) can be resolved. In other words, it is possible to prevent liquid from seeping into the paper substrate 6 when the contents contain liquid, and to prevent peeling or tearing of the paper substrate 6 around the opening.

[0028] In plan view, the first aperture region 7a may coincide with the second aperture region 3a (see Figures 4 and 5), or it may be a different region (see Figures 10 and 13). Furthermore, it is preferable that the first opening region 7a is not outside the second opening region 3a. That is, it is preferable that the first opening region 7a coincides with the second opening region 3a (see Figures 4 and 5), or that the first opening region 7a is contained within the second opening region 3a (see Figures 10 and 13). If the first opening region 7a is outside the second opening region 3a, the adhesive layer 31 of the base material 3 will be exposed to the inside of the paper container 5 in the portion of the first opening region 7a that is outside the second opening region 3a in a plan view. This can lead to the inconvenience of the contents being adsorbed onto the exposed adhesive layer 31 when the contents are removed. However, if a non-adhesive portion is provided on the exposed adhesive layer 31 by adhesive-reducing treatment or the like, this inconvenience will not occur even if the first opening region 7a is outside the second opening region 3a.

[0029] Figures 1 to 5 show the case where the lower substrate 3 and inner layer film 7 have openings 30 and 70 from the front when first opened, and the adhesive layer is omitted. In this case, it is preferable that a non-adhesive portion is provided in the area corresponding to the opening 30 of the lower substrate 3 in the adhesive layer (not shown) provided on the lower substrate 3 side of the upper substrate 4. This is because the adhesive layer in this area is exposed inside the paper container 5, which could cause the contents to adhere to the adhesive layer, worsen the user experience when opening the flap label 2, or allow external dust to adhere to it.

[0030] The lower substrate 3 and upper substrate 4 described above are, for example, resin films. Examples of main materials for the resin film include polyethylene resins, polypropylene (PP) resins, cyclic olefin resins, polyolefin resins such as copolymer polymers containing polyethylene, polyester resins such as polyethylene terephthalate (PET), polyamide resins, polystyrene resins, and (meth)acrylic resins.

[0031] The thickness of the lower substrate 3 is not particularly limited, but is preferably 30 to 300 μm, and more preferably 50 to 200 μm. The thickness of the upper substrate 4 is not particularly limited, but is preferably 5 to 150 μm, and more preferably 50 to 100 μm.

[0032] The upper substrate 4 may have a single-layer structure or a multilayer structure. An example of a multilayer structure is a laminate of PET and PP.

[0033] Furthermore, the upper substrate 4 may include a design layer formed from a printed layer or the like in order to enhance visibility and advertising effect. Various characters and patterns may be formed on the design layer. The printed layer can be formed by applying various inks suitable for the printing method to the upper substrate 4 using various printing methods and then curing it.

[0034] [Embodiment 2] The paper container with a flap label of Embodiment 2 will be described with reference to Figures 6 to 9. In Embodiment 2, the first opening region 7a and the second opening region 3a are peel-off portions 30P and 70P that peel off to form an opening when the product is first opened. Embodiment 2 differs from Embodiment 1 mainly in this respect.

[0035] The peeled portions 30P and 70P are, for example, portions separated by easily breakable lines 3X and 7X for forming openings, or portions enclosed by the easily breakable lines 3X and 7X.

[0036] In Figures 6 and 7, the easily breakable wires 3X and 7X are provided around the entire circumference of the opening regions 3a and 7a. However, the easily breakable wires 3X and 7X do not necessarily need to be provided around the entire circumference of the opening regions 3a and 7a; they only need to be provided so that openings 30 and 70 are formed in the opening regions 3a and 7a when the easily breakable wires 3X and 7X break upon initial opening. For example, as shown in Figure 17, the easily breakable wire 3X may be provided so as to surround the tip side where the gripping portion 4a is located and both sides. In this case as well, when the upper base material 4 is peeled off from the tip side during the initial opening, the easily breakable wire 3X breaks, forming an opening 30 in the opening region 3a. Although not shown, the easily breakable wire 7X may also be provided so as to surround the same three sides.

[0037] The easily breakable lines 3X and 7X are not particularly limited to any linear portion that breaks when the leading edge of the upper base material 4 is peeled away from the lower base material 3 during the initial opening, but examples include perforations, half-cut lines, and partial cut lines.

[0038] Perforations consist of, for example, multiple intermittently formed through-holes. The shape of a single through-hole can be, for example, a straight line, a circle, or a curved line. Half-cut lines are lines formed by cuts that do not penetrate completely through the thickness direction of the label substrate, but reach partway through the thickness direction of the label substrate. Note that cut lines and perforations may be used in combination.

[0039] In Embodiment 2, as shown in Figure 9, the lower substrate 3 has an adhesive layer (first adhesive layer 31) on the paper substrate 6 and inner layer film 7 side, and the upper substrate 4 has an adhesive layer (second adhesive layer 41) on the lower substrate 3 side.

[0040] In this embodiment, the second adhesive layer 41 of the upper substrate 4 is a weakly adhesive layer that can be repeatedly attached and detached, while the adhesive layer 31 of the lower substrate 3 is a strong adhesive layer having higher adhesive strength than the weakly adhesive layer. In this case, the lower substrate 3 is firmly attached to the paper substrate 6 and firmly attached to the inner layer film 7 inside the opening 60 of the paper substrate 6 in a plan view. This prevents the lower substrate 3 from peeling off the paper container 5 when attaching or detaching the upper substrate 4, and allows for repeated attachment and detachment of the upper substrate 4.

[0041] As shown in Figures 8 and 9, upon initial opening, the easily breakable lines 3X and 7X break, forming openings 30 and 70 in the opening regions 3a and 7a. At the same time, the peel-off portions 30P and 70P of the lower substrate 3 and inner layer film 7 remain attached to the upper substrate 4. This reinforces the portion of the upper substrate 4 that seals the dispensing opening, maintaining a flat state and making it less likely for wrinkles or folds to occur in the upper substrate 4. This allows the airtight seal of the paper container 5 by the flap label 2 to be continuously maintained, and for example, it is possible to more reliably prevent the drying of liquid contents such as wet wipes and face masks remaining inside the paper container 5.

[0042] The weak adhesive used to form the weak adhesive layer is not particularly limited, but for example, a pressure-sensitive adhesive (acrylic adhesive) may be used. The strong adhesive used to form the strong adhesive layer is not particularly limited, but for example, a pressure-sensitive adhesive (acrylic adhesive), a heat-sensitive adhesive (hot melt adhesive) may be used.

[0043] In Embodiment 2, even if a non-adhesive portion is not provided in the area corresponding to the opening 30 of the lower base material 3 in the adhesive layer 41 provided on the lower base material 3 side of the upper base material 4, the adhesive layer 41 will not be exposed inside the paper container 5 or exposed to the outside when opened. Furthermore, compared to the case where the lower base material 3 and inner layer film 7 have openings 30, 70 from the front when first opened, as in Embodiment 1, the portion that seals the dispensing opening (openings 30, 70) of the flap label 2 is composed of three films (see Figure 9(b)). As a result, the upper base material 4 in that portion is reinforced, maintaining a flat state and suppressing the occurrence of wrinkles and folds. This allows the upper base material 4 to make good surface contact with the lower base material 3 around the dispensing opening, thereby improving the airtightness inside the paper container 5. This, for example, can suppress deterioration and drying of the contents remaining inside the paper container 5.

[0044] [Embodiment 3] A paper container with a flap label according to Embodiment 3 will be described with reference to Figures 10 to 14. In Embodiment 3, in a plan view, the first opening region 7a of the inner film 7 does not coincide with the second opening region 3a of the lower substrate 3, and the first opening region 7a of the inner film 7 is located inside the second opening region 3a of the lower substrate in a plan view. That is, in a plan view, the first opening region 7a of the inner film 7 is smaller than the second opening region 3a of the lower substrate 3. Embodiment 3 differs from Embodiment 2 primarily in this respect.

[0045] In Embodiment 3, the above configuration prevents misalignment when attaching the flap label 2 to the surface of the paper container 5 where the opening 60 is provided, thereby preventing changes in the size of the dispensing opening and preventing the container from becoming unopenable.

[0046] In the case of Embodiment 2, if the second opening area 3a is misaligned relative to the first opening area 7a due to misalignment when attaching the flap label 2, only the overlapping portion of the second opening area 3a and the first opening area 7a will function as the dispensing opening. As a result, the dispensing opening will be smaller than the original size of the opening areas 3a and 7a, and the size of the dispensing opening will vary due to the misalignment (see Figure 9). Furthermore, if the flap label 2 is misaligned, a portion of the outer periphery of the release portion 30P of the lower substrate 3 will be firmly adhered to the portion of the inner film 7 other than the release portion 70P by the strong adhesive layer 31. Similarly, a portion of the outer periphery of the release portion 70P of the inner film 7 will also be firmly adhered to the portion of the lower substrate 3 other than the release portion 30P by the strong adhesive layer 31. Therefore, if the misalignment is large, even if the upper substrate 4 is peeled off, the release portion 30P of the upper substrate 4 and the lower substrate 3, which were adhered together by the weak adhesive layer 41, will separate first, and the release portion 30P of the lower substrate 3 and the release portion 70P of the inner film 7 will remain attached to the paper container 5, potentially making it impossible to open (see Figure 9).

[0047] In contrast, in Embodiment 3, even if there is some misalignment when attaching the flap label 2, as long as the first opening region 7a is within the range of the second opening region 3a in a plan view, the size of the dispensing opening, which is the original size of the first opening region 7a, will not change (see Figure 13). Furthermore, even if there is some misalignment when attaching the flap label 2, as long as the first opening area 7a is within the range of the second opening area 3a, the peel portion 70P of the inner layer film 7 will not adhere to any part of the lower substrate 3 other than the peel portion 30P (see Figure 13). This helps to prevent the package from becoming unopenable.

[0048] However, if the first opening region 7a is made smaller than the second opening region 3a, even if there is no misalignment when attaching the flap label 2, the lower substrate 3 may be firmly adhered to the portion of the inner layer film 7 other than the peel-off portion 70P in the region outside the first opening region 7a within the second opening region 3a in a plan view, making it impossible to open. For this reason, in Embodiment 3, it is preferable that the adhesive layer 31 of the lower substrate 3 has a non-adhesive portion 31a in the region outside the first opening region 7a within the second opening region 3a in a plan view. This prevents the package from becoming impossible to open.

[0049] As a method for forming the non-adhesive portion 31a, for example, an adhesive layer 31 may be provided on the entire surface of the inner film 7 side of the lower substrate 3, and a process may be performed to make the adhesiveness of the non-adhesive portion 31a to the adhesive layer 31 on the inner film 7 side irremovable (for example, a process of laminating a mask layer (adhesive suppression layer) onto the adhesive layer 31), thereby making it impossible to adhere the inner film 7 side of the non-adhesive portion 31a. Alternatively, an adhesive layer may not be provided on the non-adhesive portion 31a, thereby making it impossible to adhere the inner film 7 side of the non-adhesive portion 31a.

[0050] It is not necessary to provide a non-adhesive portion 31a in the entire area of ​​the second opening region 3a that is outside the first opening region 7a in a plan view. For example, as shown in Figure 14, in a plan view, an adhesive portion 31b may be left in the area of ​​the second opening region 3a that is outside the first opening region 7a, where the adhesive layer 31 does not have a non-adhesive portion 31a. In this case, by providing the inner layer film 7 in this adhesive portion 31b, the opening of the upper substrate 4 is restricted, preventing the entire upper substrate 4 from being peeled off from the paper container 5 when the upper substrate 4 is opened, and allowing it to be folded at a predetermined folding position 4b (see Figure 12).

[0051] In Figure 14 and Figures 16 and 17 described later, the hatched areas indicate non-adhesive areas that have undergone adhesive-reducing treatment. In the illustrated flap label 2, a gripping portion 4a is provided at the tip of the upper base material 4, which is a protruding portion for gripping when peeling off. The gripping portion 4a has a non-adhesive portion 41a on the second adhesive layer 41 of the upper base material 4, making it easy to grip and preventing discomfort when gripped (see Figure 14).

[0052] Referring to Figures 15 and 16, in Embodiment 3, it is more preferable that the adhesive layer 31 of the lower substrate 3 extends, in a plan view, not only to the area of ​​the second opening region 3a of the lower substrate 3 that is outside the first opening region 7a of the inner layer film 7, but also to a predetermined width portion both outside and inside that region. In this way, because the non-adhesive portion 31a extends over a wide area, even if misalignment occurs when attaching the flap label, the non-adhesive portion 31a is present in the area outside the first opening region 7a within the second opening region 3a in a plan view. This prevents the lower substrate 3 from being firmly adhered to parts of the inner layer film 7 other than the peel-off portion 70P. Therefore, it is possible to more reliably prevent the package from becoming unopenable even if misalignment occurs when attaching the flap label 2.

[0053] Furthermore, as a paper container 5 made by lining the entire inside surface of a container made from a paper base material 6 with a resin film, for example, a square-shaped paper container 5 having an open surface 71a as shown in Figure 18(b) can be used, in which the open surface 71a is sealed with a sealing film 71. Such paper containers, which do not have an opening 60 and a flap label 2, are disclosed, for example, in International Publication No. 2012 / 049005.

[0054] Referring to Figure 18, a paper container 1 with a flap label sealed with such sealing film 71 will be described. As shown in Figure 18(a), first, an opening 60 is made on the bottom surface of a square-shaped container made from a paper substrate 6, that is, on the surface opposite to the open surface 71a, and the inner layer film 7 is lined to the entire inner surface of the paper substrate 6, including the opening 60. Then, an opening 70 or a release portion (not shown) is made in the inner layer film 7, and the flap label 2 is attached to it, thereby creating a square-shaped container with a flap label 2 as shown in Figure 18(b). After the contents 8 are placed inside the box-shaped container with the flap label 2 through the open surface 71a, the sealing film 71 is joined to the inner layer film 7 backed on the flange portion 6a of the paper substrate 6 by heat fusion or the like, thereby manufacturing a paper container 1 with a flap label in which the contents 8 are sealed.

[0055] Thus, the paper container 5 has an open surface 71a on a side different from the side having the opening 60, and a flange portion 6a around the open surface 71a. With the contents 8 stored inside the paper container 5, a sealing film 71 that closes the open surface 71a may be heat-fused to the portion of the inner layer film 7 that is backed by the flange portion 6a, thereby sealing the contents 8 (see Figure 18(c)).

[0056] In addition, in sealed paper containers, such as those disclosed in International Publication No. 2012 / 049005, where the open surface of a box-shaped paper container is sealed with a sealing film, it is conceivable to provide an opening in the sealing film and attach a flap label thereto. However, in that case, the sealing film is prone to wrinkling due to the attachment and detachment of the flap label, and the wrinkling makes it difficult to seal the paper container with the flap label. In contrast, as shown in Figure 18, by providing an opening 60 on the side of the paper substrate 6 opposite to the sealing film 71 and attaching the flap label 2 thereto, the area around the opening 60 is reinforced by the paper substrate 6 and maintains a flat state, making it less likely for wrinkles to form. This allows the airtight seal of the paper container 5 by the flap label 2 to be continuously maintained, and for example, it is possible to more reliably prevent the drying of liquid contents such as wet wipes and face masks remaining inside the paper container 5.

[0057] The present invention is not limited to the embodiments described above and can be modified in various ways. Two or more embodiments selected from the various embodiments described above may be combined as appropriate, or at least one configuration (part of a configuration) selected from the various embodiments described above may be replaced with a part of a configuration of another embodiment. [Explanation of symbols]

[0058] 1: Paper container with flap label 2: Flap label 3: Lower base material 3a: Opening area (second opening area) 3X: Easily breakable wire 30: Opening 30P: Peeled area 31: Adhesive layer (first adhesive layer) 31a: Non-adhesive part 31b:Adhesive part 4:Top base material 4a: Pinching part 4b: Folding position 41: Adhesive layer (second adhesive layer) 41a: Non-adhesive part 5: Paper container 6:Paper base material 6a: Flange section 60: Opening 7: Inner layer film 7a: Opening area (first opening area) 7X: Easy break line 70: Opening 70P: Peeled area 71: Film for sealing 71a: Open surface 8:Contents

Claims

1. A paper container comprising a paper substrate having an opening, and an inner layer film backing the region of the paper substrate including the opening, A flap label attached to the outside of the surface of the paper container having the opening, A paper container with a flap label, comprising: The inner layer film has a first opening region in plan view that is located inside the opening of the paper substrate, and is provided with an opening or a peeling portion that is peeled off to form an opening when the paper substrate is first opened. The flap label includes a lower substrate attached to the area of ​​the paper substrate including the opening, and an upper substrate attached to the lower substrate. The lower substrate has a second opening region in plan view, located inside the opening of the paper substrate, where an opening or a peeling portion is provided that is peeled off upon initial opening to form an opening. The upper substrate is repeatedly and detachably attached to the lower substrate so as to close the second opening region. In a plan view, the lower substrate is attached to the inner layer film on the inside of the opening of the paper substrate. Paper container with flap label.

2. The first opening region of the inner layer film is located inside the second opening region of the lower substrate in a plan view. A paper container with a flap label as described in claim 1.

3. The lower substrate has an adhesive layer on the paper substrate and the inner layer film side. The adhesive layer has a non-adhesive portion in the region of the second opening region that is outside the first opening region when viewed in plan. A paper container with a flap label as described in claim 2.

4. The paper container has an open surface on a surface different from the surface having the opening, and has a flange portion around the open surface. With the contents stored inside the paper container, a sealing film that closes the open surface is heat-sealed to the portion of the inner layer film that is backed with the flange portion, thereby sealing the contents. A paper container with a flap label as described in claim 1.

Images