Pouch container, and resealing method of pouch container

Abstract

To provide a pouch container capable of suppressing a content leaking to the outside even when a force is applied to the pouch container from the outside, and to provide a resealing method of the pouch container.SOLUTION: A pouch container includes: a storage part formed by sealing a peripheral edge part of opposing film sheets, and for storing a content; and an openable take-out part for taking out the content from the storage part. It also includes, on an outside surface of the pouch container, an adhesive layer for fixing the film sheets in a state of being folded two times or more so as to wrap in the opened take-out part. The adhesive force of the adhesive layer is larger than a repulsive force of the film sheets generating when fixing the film sheets in a state of being folded two times or more so as to wrap in the opened take-out part.SELECTED DRAWING: Figure 1A

Description

[Technical field]

[0001] The present invention relates to a pouch container and a method for resealing a pouch container. [Background technology]

[0002] Refill products are increasing in the fields of skin cleansing agents such as shampoos and body soaps, hair cosmetics such as conditioners and treatments, skin cosmetics such as lotions and milky lotions, and household cleaners for clothing, tableware, etc. Refill products are products for refilling new contents when the contents stored in a bottle or the like made of, for example, plastic, glass, etc., have been used up. Such refill products are generally often provided in the form of a pouch container that stores the contents.

[0003] A pouch container is formed by sealing the periphery of a film sheet, and has a storage section for storing the contents and a removal section for removing the contents from the storage section. Among such pouch containers, if the contents are not used up in one go, the contents remain in the pouch container, so a reusable pouch container is used.

[0004] As an example of a reusable pouch container, as disclosed in Patent Document 1, there is a pouch container that has a resin member called a spout attached to the opening and a cap that screws onto the spout. However, a pouch container with a spout attached increases the manufacturing cost because the spout is a separate member from the film sheet. Furthermore, the amount of resin material used increases, which increases the environmental impact.

[0005] Furthermore, as a reusable pouch container, for example, Patent Document 2 discloses a pouch container in which a film sheet is folded so that a spout for pouring out the contents faces downward. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2013-203397 A [Patent Document 2] JP 2001-151250 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, although a pouch container in which a film sheet is folded without using a spout can reduce manufacturing costs and environmental impact because it does not use a spout, there is a problem in that if a resealed pouch container is tipped over or dropped and force is applied to the pouch container from the outside, the contents of the pouch container may leak to the outside.

[0008] Therefore, there is a demand for a pouch container that does not use a spout, which can reduce manufacturing costs and environmental impact, and which can prevent the contents from leaking to the outside even if force is applied to the pouch container from the outside when the pouch container is resealed.

[0009] The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a pouch container and a method for resealing a pouch container that can prevent the contents from leaking to the outside even if force is applied to the pouch container from the outside when the pouch container is resealed. [Means for solving the problem]

[0010] The pouch container according to the present invention is formed by sealing the peripheral edges of two opposed film sheets. The pouch container has a storage section for storing the contents and an openable removal section for removing the contents from the storage section, and has an adhesive layer on the outer surface of the pouch container for fixing a film sheet in a state in which the film sheet is folded two or more times so as to wrap around the opened removal section, and the adhesive strength of the adhesive layer is greater than the repulsive force of the film sheet generated when the film sheet is fixed in a state in which the film sheet is folded two or more times so as to wrap around the opened removal section.

[0011] With such a configuration, the pouch container according to the present invention can prevent the contents from leaking to the outside even if an external force is applied to the pouch container when the pouch container is resealed.

[0012] The pouch container according to the present invention may have a folding guide, and the film sheet may be folded based on the folding guide to roll up the opened removal portion.

[0013] With this configuration, the pouch container according to the present invention can more easily roll up the opened removal portion.

[0014] In the pouch container of the present invention, the adhesive strength of the adhesive layer may be 10 times or more greater than the repulsive force of the film sheet generated when the film sheet is folded two or more times to wrap around the opened removal portion and fixed in place.

[0015] With this configuration, the pouch container of the present invention can more firmly securely fix the film sheet in a folded state two or more times to wrap around the opened removal portion, thereby further preventing the contents from leaking to the outside.

[0016] The method for resealing a pouch container according to the present invention is a method for resealing a pouch container which is formed by sealing the peripheral portions of opposed film sheets, and which has a storage portion for storing contents, and an openable removal portion for removing the contents from the storage portion, and which includes a folding step of folding the film sheet two or more times so as to wrap around the opened removal portion, with an adhesive layer on the outer surface of the pouch container, and a sticking step of attaching the film sheet to the adhesive layer and fixing the film sheet in a state in which it is folded two or more times so as to wrap around the opened removal portion, wherein the adhesive strength of the adhesive layer is greater than the repulsive force of the film sheet generated when fixing the film sheet in a state in which it is folded two or more times so as to wrap around the opened removal portion.

[0017] With such a configuration, the method for resealing a pouch container according to the present invention can prevent the contents from leaking to the outside when the pouch container is resealed, even if force is applied to the pouch container from the outside.

[0018] The method for resealing a pouch container according to the present invention may have a folding guide, and the film sheet may be folded based on the folding guide to roll up the opened removal portion.

[0019] With this configuration, the method for resealing a pouch container according to the present invention can more easily roll up the opened removal portion.

[0020] In the method for resealing a pouch container according to the present invention, the adhesive strength of the adhesive layer may be 10 times or more greater than the repulsive force of the film sheet generated when the film sheet is folded two or more times to wrap around the opened removal portion and fixed in place.

[0021] With this configuration, the method for resealing a pouch container according to the present invention can more firmly securely fix the film sheet in a folded state two or more times to wrap around the opened removal portion, thereby further preventing the contents from leaking to the outside. Effect of the Invention

[0022] According to the present invention, when the pouch container is resealed, even if a force is applied to the pouch container from the outside, leakage of the contents to the outside can be suppressed. [Brief description of the drawings]

[0023] [Figure 1A] 1 is a schematic diagram of an unopened pouch container according to this embodiment, viewed from the first surface side. FIG. [Figure 1B] 1 is a schematic diagram showing a side cross section of a pouch container according to an embodiment of the present invention. [Figure 1C] 1 is a schematic diagram of a pouch container according to this embodiment in an open state, viewed from the first surface side. [Figure 2A] 2 is a schematic diagram showing the film sheet of the pouch container according to the present embodiment folded once, as viewed from the second surface side. FIG. [Figure 2B]3 is a schematic diagram showing the film sheet of the pouch container according to the present embodiment folded twice, as viewed from the second surface side. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] <Pouch container> Hereinafter, a pouch container 1 according to an embodiment of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are designated by the same reference characters, and description thereof will not be repeated.

[0025] Fig. 1A is a schematic diagram of an unopened pouch container 1 according to this embodiment, viewed from the first surface portion 11 side. Fig. 1B is a schematic diagram showing a side cross section of the pouch container according to this embodiment. Fig. 1C is a schematic diagram of an opened pouch container 1 according to this embodiment, viewed from the first surface portion 11 side. The pouch container 1 according to this embodiment includes at least a storage section 2, a removal section 3, and an adhesive layer 4.

[0026] The pouch container 1 according to this embodiment has a first surface portion 11, a second surface portion 12, and a bottom surface portion 13 formed by a film sheet. The first surface portion 11 and the second surface portion 12 face each other so as to overlap in the thickness direction of the film sheet and form the body portion of the pouch container 1, and the bottom surface portion 13 forms the bottom surface of the pouch container 1.

[0027] The first surface portion 11 and the second surface portion 12 are sealed at the left and right end seal portions 14 and the upper seal portion 15, which are the peripheral portions of the opposing film sheets. As shown in FIG. 1B, the bottom surface portion 13 is formed by sandwiching a film sheet folded in half between the lower portion of the first surface portion 11 and the lower portion of the second surface portion 12. The first surface portion 11 and the bottom surface portion 13 are sealed at the seal portion 16, which is the peripheral portion of the opposing film sheets, and the second surface portion 12 and the bottom surface portion 13 are sealed at the seal portion 17, which is the peripheral portion of the opposing film sheets. The method of sealing the seal portions 14 to 17 is not particularly limited as long as they can be bonded. Examples of the sealing method include heat bonding and the like.

[0028] The film sheet used in the pouch container 1 according to this embodiment is not particularly limited, and a commonly used one can be used. As the film sheet, a laminated film sheet of two or more layers is preferable. Specific examples of laminated film sheets include those in which polyethylene, polypropylene, etc., which have a high sealing effect and fusion effect, are used as an inner layer, aluminum foil, nylon, polyester, etc., which impart light-shielding properties, strength, and gas barrier properties, are used as an intermediate layer, and nylon, polyester, etc., which impart printability and strength, are used as an outer layer. When using such a laminated film sheet, the film sheets are overlapped so that the inner surface of the pouch container 1 becomes the inner layer.

[0029] The storage section 2 is disposed in the non-sealed portion of the opposing film sheet, stores contents, and is sealed by the seal portions 14 to 17. The storage section 2 contains a liquid or powder skin cleansing agent, The contents that can be stored include hair cosmetics, skin cosmetics, household detergents, seasonings, etc.

[0030] The removal section 3 is a section where the contents are removed from the storage section 2, and is formed to be openable. In the pouch container 1 according to this embodiment, a notch 5 is formed on one side of the upper end of the pouch container 1. Then, as shown in Fig. 1C, for example, the film sheet is torn from the notch 5 or cut with scissors or the like to open the removal section 3 and form an opening, and the contents are removed from the opening.

[0031] The adhesive layer 4 is provided on the outer surface of the pouch container 1, and fixes the film sheet so as to hold the film sheet folded two or more times so as to wrap the opened removal part 3. The adhesive strength of the adhesive layer 4 is greater than the repulsive force of the film sheet generated when the film sheet is fixed in the state described below. The adhesive layer 4 is not particularly limited as long as it can hold the film sheet folded two or more times so as to wrap the opened removal part 3, and the adhesive strength is greater than the repulsive force of the film sheet generated when the film sheet is fixed in the state. For example, an adhesive, an adhesive tape having an adhesive layer on a substrate, etc. can be used as the adhesive layer 4. In addition, the adhesive layer 4 is preferably provided with a release material. When the adhesive layer 4 with a release material is used, the adhesive layer 4 peels off the release material when the opened removal part 3 of the pouch container 1 is resealed, thereby exposing the part to which the film sheet is attached.

[0032] The location where the adhesive layer 4 is provided is not particularly limited as long as it is a position on the outer surface of the pouch container 1 where the film sheet can be folded two or more times to wrap around the opened removal portion 3. In the pouch container 1 according to this embodiment, the film sheet is folded twice, and at least a part of the adhesive layer 4 is provided in the vicinity of the opening of the opened removal portion 3 of the first surface portion 11. In addition, it is preferable that the side of the adhesive layer 4 closest to the opening is approximately parallel to the direction in which the film sheet is torn or cut from the notch 5. In this specification, the vicinity of the opening refers to an area on the first surface portion 11 or the second surface portion 12 that is within 20% of the distance from the opening to the end of the opening of the film sheet and the end of the film sheet farthest from the opening in a direction perpendicular to the direction in which the film sheet is torn or cut. In addition, in this specification, "approximately parallel to the direction in which the film sheet was torn or cut from notch 5" means that when a straight line is drawn from notch 5 in the direction in which the film sheet was torn or cut, there is almost no inclination to the straight line (for example, an inclination angle within ±10 degrees).

[0033] In addition, the adhesive strength of the adhesive layer 4 in this specification is defined as follows.

[0034] Adhesive strength of adhesive layer [N] = Adhesive strength per unit area [N / cm 2 ]×adhesive area [cm 2 ]

[0035] In this specification, the adhesive strength per unit area [N / cm 2 ] is measured as follows: (1) A 15 mm x 15 mm adhesive layer is attached to the surface of a first film sheet. (2) A second film sheet is laminated so as to overlap the first film sheet to which the adhesive layer has been attached in (1). (3) A roller weighing 2 kg is passed back and forth once on the film sheets laminated in (2) to bond the adhesive layer to both film sheets. (4) The laminated film sheets are supported by a load cell or the like to measure the adhesive force in the vertical direction [N / 2.25 cm 2 ] was measured, and the adhesive strength per unit area [N / cm 2 ].

[0036] After the removal section 3 is opened, the pouch container 1 is resealed with the contents stored in the storage section 2. The pouch container 1 is resealed by wrapping the film sheet twice around the opened removal section 3. The above is done by fixing the bent portion in the bent state.

[0037] The pouch container 1 may be folded at least twice so as to roll up the opened removal portion 3, and there is no particular restriction on how it is folded. An example of folding the film sheet of the pouch container 1 according to this embodiment twice is shown in Figs. 2A and 2B. Fig. 2A is a schematic diagram of the film sheet of the pouch container 1 according to this embodiment folded once, as viewed from the second surface portion 12 side. Fig. 2B is a schematic diagram of the film sheet of the pouch container 1 according to this embodiment folded twice, as viewed from the second surface portion 12 side.

[0038] The first folding of the film sheet in the pouch container 1 according to this embodiment is performed so that the adhesive layer 4 faces outward. At this time, the film sheet is folded along a straight line (line AA in FIG. 1C) that is approximately parallel to the direction in which the film sheet is torn or cut from the notch 5 (FIG. 2A).

[0039] The second folding of the film sheet in the pouch container 1 according to this embodiment is performed along a straight line (line BB in FIG. 1C) that is approximately parallel to the direction in which the film sheet was torn or cut from the notch 5 so as to wrap around the opened removal portion 3 (FIG. 2B). The second folding causes the adhesive layer 4, which faced outward after the first folding, to face inward, and the adhesive layer 4 faces the surface of the second surface portion 12 and is attached to the surface of the second surface portion 12. The film sheet is attached to the adhesive layer 4, and the pouch container 1 is resealed.

[0040] Furthermore, when the film sheet in the pouch container 1 is folded n times (n is an integer of 3 or more), the adhesive layer 4 is provided at a position where it is folded outward during the (n-1)th folding.

[0041] In the pouch container 1 according to the present embodiment, the film sheet is folded two or more times so as to roll up the opened removal section 3. By folding the film sheet so as to roll up the opened removal section 3, the opening formed by opening the removal section 3 has less contact with the outside of the pouch container 1. As a result, the pouch container 1 with the opened removal section 3 can be stored while suppressing deterioration of the contents stored in the storage section 2. In addition, by folding the film sheet two or more times, leakage of the contents can be suppressed, and the number of times of folding can be increased to further prevent leakage. However, when the film sheet is folded, the repulsive force increases because the film sheet tries to return to an unfolded state. Therefore, in order to maintain the state in which the film sheet is folded two or more times, the adhesive force of the adhesive layer 4 is made larger than the repulsive force of the film sheet generated when fixing the state (hereinafter, sometimes simply referred to as the "repulsive force of the film sheet").

[0042] The repulsive force of the film sheet in this specification is measured by the following method. (1) A 2 kg roller is moved back and forth once to fold the pouch container in a valley fold. (2) For each m number of folds (m is an integer of 2 or greater), a roller weighing 2 kg is moved back and forth once to roll up the area bent in (1). (3) The repulsive force [N] of the fold at the (m-1)th fold at a height of 2 mm from the horizontal plane is measured using a load cell or the like, and this is the repulsive force of the film sheet that has been folded m times.

[0043] The adhesive strength of the adhesive layer 4 is not particularly limited as long as it is greater than the repulsive force of the above-mentioned film sheet. The adhesive strength of the adhesive layer 4 is preferably 10 times or more the repulsive force of the above-mentioned film sheet, from the viewpoint of more firmly fixing the opened removal section 3 in a state in which the film sheet is folded two or more times so as to wrap around the opened removal section 3. In addition, the ... From the viewpoint of ease of handling, it is preferable that the force be 100 [N] or less.

[0044] The pouch container 1 according to this embodiment has an adhesive layer 4 on the outer surface of the pouch container 1, which fixes the film sheet in a state where it is folded two or more times so as to wrap around the opened removal part 3, and the adhesive strength of the adhesive layer 4 is made greater than the repulsive force of the film sheet generated when the film sheet is fixed in a state where it is folded two or more times so as to wrap around the opened removal part 3, thereby firmly maintaining a state where the leakage of the contents to the outside is suppressed. Therefore, the pouch container 1 according to this embodiment can suppress the leakage of the contents to the outside even if a force is applied to the pouch container from the outside when the pouch container 1 is resealed.

[0045] Furthermore, the pouch container 1 according to the present embodiment can be resealed without having a spout or a cap, so it can be manufactured at low cost and the environmental impact can be reduced. Also, the pouch container 1 according to the present embodiment does not require the contents to be used up all at once, and the contents can be stored for a long period of time without deterioration.

[0046] One embodiment of the pouch container of the present invention has been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

[0047] For example, in the pouch container 1 according to the present embodiment, the film sheet is folded at any location two or more times to roll up the opened take-out port. However, the present invention is not limited to this configuration, and the pouch container 1 may be provided with a folding guide with a predetermined folding location to make it easier to roll up the opened take-out port. As the folding guide, for example, a folding line may be provided (for example, along the lines AA and BB in FIG. 1C) at the folding location on the first surface portion 11 and / or the second surface portion 12, or a printed mark may be attached. As the folding guide, it is preferable to provide a folding line from the viewpoint of making it easier to fold. The folding line may be formed by a thin portion of the film sheet formed in a line shape, or a stripe with a convex surface and a concave back side.

[0048] In addition, in the pouch container 1 according to the present embodiment, the removal section 3 is formed on one side of the upper end. However, the present invention is not limited to this configuration, and the removal section 3 may be formed over the entire upper end. That is, all the seals at the top of the pouch container are removed, and an opening of the removal section 3 is formed over the entire upper part of the pouch container by opening. In this case, the film sheet is folded so as to roll up the opening of the removal section 3 formed over the entire upper part of the pouch container.

[0049] In the pouch container 1 according to the present embodiment, the adhesive layer 4 is provided on the film sheet on the side to be folded. However, the present invention is not limited to this configuration, and the adhesive layer may be provided at a position facing the folded film sheet on the first surface or the second surface after the film sheet is folded two or more times to wrap around the opened removal portion.

[0050] <How to reseal a pouch container> The method for resealing a pouch container 1 according to the present embodiment is a method for resealing a pouch container 1 which is formed by sealing the peripheral portions of opposed film sheets and which has a storage section 2 for storing contents and an openable removal section 3 for removing the contents from the storage section 2, and includes a folding step of folding the film sheet having an adhesive layer 4 on the outer surface of the pouch container 1 two or more times so as to wrap around the opened removal section 3, and a sticking step of attaching the film sheet to the adhesive layer 4 and fixing the state in which the film sheet is folded two or more times so as to wrap around the opened removal section 3, and the adhesive strength of the adhesive layer 4 is such that the film sheet is folded two or more times so as to wrap around the opened removal section 3. The repulsive force is larger than the repulsive force of the film sheet that occurs when the film sheet is fixed in the upwardly folded state. The storage section 2, the removal section 3, and the adhesive layer 4 of the pouch container 1 have been described above.

[0051] In the folding process, the film sheet is folded two or more times so as to roll up the opened removal portion 3. By folding the film sheet two or more times and rolling up the opened removal portion 3, leakage of the contents stored in the storage portion 2 can be suppressed.

[0052] In the adhering step, the film sheet folded so as to wrap around the opened removal portion 3 is adhered to the adhesive layer 4, and the film sheet is fixed in a state where it is folded two or more times. As described above, the adhesive layer 4 to which the film sheet is adhered has an adhesive force greater than the repulsive force of the film sheet generated when the film sheet is fixed in this state, and therefore the state can be maintained.

[0053] The method for resealing the pouch container 1 according to this embodiment has an adhesive layer 4 on the outer surface of the pouch container 1, includes a folding step and a bonding step, and can firmly maintain a state in which leakage of the contents to the outside is suppressed by making the adhesive strength of the adhesive layer 4 greater than the repulsive force of the film sheet generated when the film sheet is fixed in a state in which it is folded two or more times so as to wrap around the opened removal part 3. Therefore, the method for resealing the pouch container 1 according to this embodiment can suppress leakage of the contents to the outside when the pouch container 1 is resealed, even if a force is applied to the pouch container from the outside.

[0054] Furthermore, the method for resealing the pouch container 1 according to the present embodiment allows resealing without a spout or a cap, so that production can be performed at low cost and the environmental impact can be reduced. Also, the method for resealing the pouch container 1 according to the present embodiment does not require the contents to be used up all at once, and the contents can be stored for a long period of time without deterioration. EXAMPLES

[0055] Examples of the present invention will be described below, but the present invention is not limited to the following examples.

[0056] (Pouch container) An adhesive layer having a release paper with the adhesive strength of each of the Examples and Comparative Examples shown in Table 1 was attached to a pouch container to prepare a pouch container having an adhesive layer. In addition, a pouch container having a removal part formed at one end of the upper end (removal part (1)) and a pouch container having a removal part formed over the entire upper end (removal part (2)) were used. The adhesive layer was attached at a position where the folded state could be fixed when the film sheet constituting the pouch container was folded a predetermined number of times. The pouch containers and adhesive layers used are shown below.

[0057] Pouch container (1) (manufactured by Dai Nippon Printing Co., Ltd.): Film sheet layer structure (outer layer / middle layer / inner layer = biaxially oriented nylon film (15 μm) / aluminum-deposited PET (12 μm) / linear low-density polyethylene (90 μm)) Pouch container (2) (manufactured by Fuji Seal Co., Ltd.): Film sheet layer structure (outer layer / middle layer / inner layer = biaxially oriented nylon film (15 μm) / aluminum-deposited PET (12 μm) / linear low-density polyethylene (150 μm)) Pouch container (3) (manufactured by Fujimori Kogyo Co., Ltd.): Film sheet layer structure (outer layer / middle layer / inner layer = biaxially oriented nylon film (15 μm) / aluminum-deposited PET (12 μm) / linear low-density polyethylene (130 μm))

[0058] Adhesive layer (1): NISTACK (registered trademark) general type (manufactured by Nichiban Co., Ltd.) Adhesive layer (2): TL-202 (manufactured by Lintec Corporation) Adhesive layer (3): Nicetack Strong Type (manufactured by Nichiban Co., Ltd.)

[0059] The film sheet was folded a predetermined number of times using the pouch containers of each of the Examples and Comparative Examples shown in Table 1, and the following measurements and tests were carried out for evaluation. The results are shown in Table 1.

[0060] (Measurement of adhesive strength per unit area of ​​adhesive layer) The adhesive strength per unit area of ​​the adhesive layer was measured by the following method. (1) A 15 mm x 15 mm adhesive layer was attached to the surface of the first film sheet. (2) A second film sheet was laminated so as to overlap the first film sheet to which the adhesive layer was attached in (1). (3) A roller having a mass of 2 kg was passed back and forth once on the film sheets laminated in (2) to bond the adhesive layer to both film sheets. (4) The laminated film sheets were supported by a load cell (AND Corporation MCT-2150) to measure the adhesive force in the vertical direction [N / 2.25 cm 2 ] was measured, and the adhesive strength per unit area [N / cm 2 ].

[0061] (Calculation of adhesive strength of adhesive layer) The adhesive strength of the adhesive layer was calculated by multiplying the area of ​​the adhesive layer (the dimensions of the adhesive layer in each of the Examples and Comparative Examples are shown in Table 1) by the adhesive strength per unit area measured above.

[0062] (Measurement of the repulsive force of a film sheet) The repulsive force of the film sheet was measured by the following method. (1) When folding the film sheet twice [1] A 2 kg roller is moved back and forth once to fold the pouch container in a valley fold. [2] A 2 kg roller is used to make one back and forth motion to roll up the area bent in [1], creating a valley fold (second time). [3] The repulsive force [N] of the crease at the second fold, at a height of 2 mm from the horizontal plane, is measured using a load cell (MCT-2150, manufactured by AND Corporation) and this is the repulsive force of the film sheet. (2) When folding the film sheet three times [1] A 2 kg roller is moved back and forth once to fold the pouch container in a valley fold (first time). [2] A 2 kg roller is used to make one back and forth motion to roll up the area bent in [1], creating a valley fold (second time). [3] A 2 kg roller is used to make one full movement back and forth to further fold the area folded in [1] (third time). [4] The repulsive force [N] of the crease at the third fold, at a height of 2 mm from the horizontal plane, is measured using a load cell and this is the repulsive force of the film sheet.

[0063] (Drop test) A drop test of the pouch container was carried out in the following manner. [1] 350 ml of contents (water) is stored in the pouch container storage compartment. [2] Open the removal portion of the pouch container prepared in [1], fold the film sheet two or three times to wrap the opened removal portion around it, and attach the film sheet to the adhesive layer to reseal the pouch container. [3] The film sheet of the resealed pouch container in [2] was dropped from a height of 100 cm onto concrete with the folded side down. [4][3] was dropped onto concrete multiple times. [5] The number of times before the contents were found to leak was recorded. The maximum number of drops was set at 10.

[0064] (Pressure Test) A pressure test of the pouch container was carried out in the following manner. [1] 350 ml of contents (water) is stored in the pouch container storage compartment. [2] Open the removal portion of the pouch container prepared in [1], fold the film sheet two or three times to wrap the opened removal portion around it, and attach the film sheet to the adhesive layer to reseal the pouch container. [3] The pouch container resealed in [2] was turned on its side, and a load was applied vertically to the pouch container, without pressing down on the folded part of the film sheet. The load was increased by 5 kg every 10 seconds. [4] The load immediately preceding the load at which leakage was confirmed was recorded. The maximum load was 70 kg.

[0065] (Pouch container evaluation) The pouch container was evaluated for floating, dropping, and pressure resistance of the removal part. The evaluation criteria for each item are shown below. Lifting of removal part ◯: Visual inspection, no lifting observed 7 days after application to the adhesive layer. △: Visual inspection: peeling was observed within 7 days after application to the adhesive layer. ×: Visual inspection revealed that the adhesive layer was peeled off immediately after application. Drop rating ◎: The number of recorded drops in the drop test was 6 or more. ○: The drop test was recorded 4 or 5 times. △: The drop test was recorded 2 or 3 times. ×: The number of recorded drops in the drop test was one or less. Pressure resistance rating ◎: Recorded load in pressure resistance test is 50kg or more ○: Recorded load in pressure test is 20kg or more and less than 50kg △: Recorded load in pressure test is 10kg or more but less than 20kg ×: Recorded load in pressure test is less than 10 kg

[0066] [Table 1]

[0067] The pouch containers of Examples 1 to 15 were all evaluated as being sufficient in terms of floating, dropping, and pressure resistance of the removal portion. Therefore, it was shown that the pouch containers of Examples 1 to 15 can prevent the contents from leaking out even if a force is applied to the pouch container from the outside when the pouch container is resealed. [Industrial Applicability]

[0068] The pouch container and the method for resealing a pouch container of the present invention can prevent the contents from leaking out even if a force is applied to the pouch container from the outside when the pouch container is resealed. Therefore, the pouch container and the method for resealing a pouch container of the present invention are useful for businesses that handle pouch containers and pouch container resealing methods. [Explanation of symbols]

[0069] REFERENCE SIGNS LIST 1...pouch container, 11...first surface portion, 12...second surface portion, 13...bottom surface portion, 14, 15, 16, 17...seal portion, 2...storage portion, 3...removal portion, 4...adhesive layer, 5...notch

Claims

1. A pouch container is formed by sealing the peripheral edges of opposed film sheets, and is provided with a storage section for storing contents and an openable removal section for removing the contents from the storage section, The pouch container has an adhesive layer on the outer surface thereof for fixing the film sheet in a state where the film sheet is folded two or more times so as to wrap around the opened removal portion, The pouch container has an adhesive layer having an adhesive strength greater than the repulsive force of the film sheet generated when the film sheet is folded two or more times to wrap around the opened removal portion and fixed in place.

2. It has a folding guide, 2. The pouch container according to claim 1, wherein the film sheet is folded based on the folding guide to roll up the opened removal portion.

3. 3. The pouch container according to claim 1, wherein the adhesive strength of the adhesive layer is at least 10 times the repulsive force of the film sheet generated when the film sheet is folded at least twice to wrap around the opened removal portion and fixed in place.

4. A method for resealing a pouch container which is formed by sealing peripheral portions of opposed film sheets and has a storage section for storing contents and an unsealable removal section for removing the contents from the storage section, comprising the steps of: The pouch container has an adhesive layer on its outer surface, a folding step of folding the film sheet two or more times so as to wrap the opened removal portion; and a bonding step of bonding a film sheet to the adhesive layer and fixing the film sheet in a folded state two or more times so as to wrap around the opened removal portion, This method for resealing a pouch container comprises an adhesive layer having an adhesive strength greater than the repulsive force of the film sheet generated when the film sheet is fixed in a state of being folded two or more times so as to wrap around the opened removal part.

5. It has a folding guide, The method for resealing a pouch container according to claim 4, wherein the film sheet is folded based on the folding guide to roll up the opened removal portion.

6. 6. The method for resealing a pouch container according to claim 4 or 5, wherein the adhesive strength of the adhesive layer is at least 10 times the repulsive force of the film sheet generated when the film sheet is folded two or more times to wrap around the opened removal portion and fixed in place.

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