JP7524814B2 - Pouch - Google Patents

Description

The present invention relates to a pouch for easy removal of contents.

Pouches have been widely used in the past to store contents and to allow the contents to be removed as needed. Pouches designed to improve the ease of handling of the contents have also been proposed (see Patent Document 1).

JP 2004-256120 A

The above conventional technology has a top gusset sheet folded into the upper side of the exterior sheet, and because this top gusset sheet has small holes, it is easier to remove powder or granular materials. However, it is not suitable for solid materials that are slightly larger than powder or granules.

Therefore, the objective of the present invention is to provide a pouch that allows solid contents to be easily removed.

In order to solve the above problems, the present invention provides
A pouch having a storage portion between a front film and a back film,
A first edge portion;
a second edge portion opposite the first edge portion;
a third edge and a fourth edge extending between the first edge and the second edge;
an opening/closing mechanism formed between the first edge portion and the second edge portion and closer to the first edge portion;
a partition film having a folding portion on the second edge side and joined to the front film and the back film by two partition seal portions at a position closer to the second edge than the opening/closing mechanism;
The partition film has a through-hole at a position including the folded portion,
The pouch is provided, wherein the through-hole portion is formed at a position that does not overlap with the partition seal portion in a direction along the folded-in portion.

In addition, in the pouch of the present invention,
The partition seal portion may have a length in a direction intersecting the folded-in portion that becomes smaller the closer it is to the through-portion in a direction along the first edge portion.

In addition, in the pouch of the present invention,
The sealing member may further include a connecting seal portion that connects the two partition seal portions.

The pouch of the present invention further comprises:
The opening/closing mechanism and the partition film may be integrally formed.

In addition, in the pouch of the present invention,
The through portion may be formed at a position overlapping a midline between the third edge portion and the fourth edge portion.

The pouch of the present invention further comprises:
The second edge may have a bottom gusset portion.

According to the present invention, it is possible to provide a pouch from which solid contents can be easily removed.

FIG. 1 is a front view showing a pouch according to a first embodiment of the present invention. FIG. 2 is an exploded view showing components constituting the pouch according to the first embodiment of the present invention. 1 is a cross-sectional view of a pouch according to a first embodiment of the present invention. 4A and 4B are diagrams showing details of the partition film 23. FIG. FIG. 13 is a front view of a modified pouch having a penetration of a different shape. FIG. 2 is a front view of the pouch according to the first embodiment after it has been filled with contents and sealed. FIG. 11 is a front view showing a pouch according to a second embodiment of the present invention. FIG. 11 is an exploded view showing components constituting a pouch according to a second embodiment of the present invention. FIG. 13 is a front view of a pouch according to a second embodiment after it has been filled with contents and sealed. FIG. 13 is a front view showing a pouch according to a modified example. 13 is a cross-sectional view of a pouch according to a modified example of a portion including a fitting 30. FIG. 1 is a diagram showing the appearance of the pouch after the first edge 4 side has been cut along the intended opening line 12. FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
First Embodiment
FIG. 1 is a front view showing a pouch according to a first embodiment of the present invention. FIG. 2 is an exploded view showing members constituting the pouch according to the first embodiment of the present invention. FIG. 3 is a partial cross-sectional view of an opening/closing mechanism of the pouch according to the first embodiment of the present invention. The back view of the pouch is omitted because it is the same as the front view of the pouch in FIG. 1. The pouch according to the present embodiment shown in FIG. 1 shows a pouch in a state before being filled with contents (a state in which the contents are not filled). The pouch according to the present embodiment is rectangular in front view and includes a first edge portion 4 and a second edge portion 5 facing each other, and a third edge portion 6 and a fourth edge portion 7 extending between the first edge portion 4 and the second edge portion 5.

In this specification, the term "rectangle" refers not only to rectangles with right-angled corners, but also to rectangles whose corners are beveled to form outwardly convex arcs, and are otherwise considered to be roughly rectangular. In addition, in this specification, the term "pouch" refers not only to pouches that are not filled with content, but also to pouches that are filled with content.

As shown in Fig. 2, the pouch of this embodiment is composed of three films: a substantially rectangular front film 1, a back film 2 having the same shape as the front film 1, and a substantially rectangular partition film 23. The pouch of this embodiment is formed by joining the three films, the front film 1, the back film 2, and the partition film 23, at predetermined locations by heat sealing (thermal fusion) or the like. The partition film 23 is connected to a male member 21 and a female member 22 that constitute a fitting 20, but is shown simplified in Fig. 2.

Figure 4 is a diagram showing the details of the partition film 23. Of these, Figure 4(a) is a plan view, and Figure 4(b) is a cross-sectional view corresponding to the C-C line in Figure 4(a). As shown in the plan view of Figure 4(a), the partition film 23 has a folded portion 23a and a through portion 24 on the straight line where the folded portion 23a is located. The folded portion 23a is a portion that is folded so as to be located on the second edge portion 5 side when the pouch is completed. The partition film 23 is divided into a first portion 23f and a second portion 23g with the folded portion 23a as the boundary. The first end 23b and the second end 23c, which are the two ends farthest from the folded portion 23a, are located closest to the first edge portion 4 when the pouch is completed. A male member 21 is connected to the vicinity of the first end 23b, and a female member 22 is connected to the vicinity of the second end 23c.

<Each seal part>
As shown in Fig. 1, the pouch of this embodiment includes a first edge seal portion 14, a third edge seal portion 16, and a fourth edge seal portion 17, and the second edge 5 side is unsealed and has an opening for filling the contents. In Fig. 1, the first edge seal portion 14, the third edge seal portion 16, and the fourth edge seal portion 17 are shown shaded. The first edge seal portion 14, the third edge seal portion 16, and the fourth edge seal portion 17 are formed by sealing and joining the front film 1 and the back film 2. The third edge seal portion 16 is formed along the third edge 6 so as to include the third edge 6 (the left end in Fig. 1), and the fourth edge seal portion 17 is formed along the fourth edge 7 so as to include the fourth edge 7 (the right end in Fig. 1). The seal width of the third edge seal portion 16 and the fourth edge seal portion 17 is preferably, for example, 5 mm or more and 30 mm or less. In this embodiment, the seal width is about 5 mm. The seal width is the distance (shortest distance) from the inner edge of the seal (the side of the contents) to the outer edge of the seal (the outside of the bag) at that location.

The partition seal portions 25 are seal portions for joining the partition film 23 to the inner surfaces of the front film 1 and the back film 2. The partition seal portions 25 are formed in a total of four locations, two on the front film 1 and two on the back film 2 side. The front film 1 and the first portion 23f of the partition film 23 are joined by the two partition seal portions 25 shown in FIG. 1. In addition, the back film 2 and the second portion 23g of the partition film 23 are joined by two partition seal portions 25 not shown.

As shown by the cross-hatching in FIG. 1, the partition seal portion 25 is formed so as to become narrower as it approaches the second edge portion 5. In other words, the partition seal portion 25 is formed so as to become wider as it approaches the first edge portion 4 and the fitting 20. In this embodiment, the partition seal portion 25 is formed in two places on each of the front film 1 side and the back film 2 side, on the third edge portion 6 side and the fourth edge portion 7 side. In this embodiment, the shape of each partition seal portion is the same and is a triangle. In FIG. 1, L4 is the maximum length of the partition seal portion 25 in the direction intersecting the folded portion 23a (the direction connecting the first edge portion 4 and the second edge portion 5), and L5 is the maximum length of the partition seal portion 25 in the direction along the folded portion 23a (the third edge portion 6 and the fourth edge portion 7). In the example of FIG. 1, the partition seal portion 25 is a right triangle with a maximum length L4 in the direction intersecting the folded portion 23a and a length L5 in the direction along the folded portion 23a. In the example of FIG. 1, the area of the partition seal portion 25 is L4 x L5 x 1/2.

The fitting seal portion 26 is formed on the first end 23b side of the male member 21 and on the second end 23c side of the female member 22. The fitting seal portion 26 is formed at a position closer to the first edge 4 of the fitting 20, spanning from the inner edge of the third edge seal portion 16 to the inner edge of the fourth edge seal portion 17. The seal width of the fitting seal portion 26 can be, for example, 5 mm.

The partition film 23 has a first portion 23f joined to the front film 1 and a second portion 23g joined to the back film 2 by the partition seal portion 25 and the fitting seal portion 26. The partition film 23 is also joined integrally to the front film 1 and the back film 2 by the third edge seal portion 16 and the fourth edge seal portion 17. The first portion 23f and the second portion 23g of the partition film 23 are also joined to each other at the third edge seal portion 16 and the fourth edge seal portion 17.

<Through-hole>
As shown in FIG. 1 and FIG. 4, the partition film 23 has a through-hole 24. In the example of FIG. 4, the through-hole 24 is rectangular, and when the partition film 23 is unfolded, the through-hole 24 is formed with a size of W1 (mm)×W2 (mm). W1 is the length in the direction along the folded portion 23a, and W2 is the length in the direction intersecting the folded portion 23a. In the example of FIG. 4, the through-hole 24 is arranged so that the center of the through-hole 24 in the direction intersecting the folded portion 23a is located on the extension line of the folded portion 23a. When the pouch is completed, when the partition film 23 is folded in two at the folded portion 23a, the through-holes 24 overlap. Therefore, as shown in FIG. 1, the through-hole 24 penetrates with a size of W1 (mm)×W6 (mm). At this time, when the partition film 23 is folded exactly in two at the folded portion 23a, W2=2×W6. In the state of FIG. 1, the length W1 is also the length in the direction along the first edge portion 4. W2 is also the length in the direction intersecting with the first edge 4. The size of the through-hole 24 can be set as appropriate, but W1 is preferably 8 mm or more and 20 mm or less, and more preferably 9 mm or more and 16 mm or less. W2 is preferably 14 mm or more and 36 mm or less, and more preferably 16 mm or more and 32 mm or less. In the example of Fig. 1, when the partition film 23 is folded in half, the through-hole 24 is square, with W1 = 15.0 (mm) and W2 = 30.0 (mm).

The position of the through-hole 24 is not particularly limited as long as it is a position including the folded portion 23a. The position including the folded portion 23a means a position including a place on the straight line where the folded portion 23a is formed. In addition, between the inner edge of the third edge seal portion 16 and the inner edge of the fourth edge seal portion 17, the position of the through-hole 24 is not particularly limited. However, it is preferable that the through-hole 24 is formed at a position overlapping the middle line between the third edge portion 6 and the fourth edge portion 7. The straight line shown by the two-dot chain line in FIG. 1 is the middle line CL, which is an imaginary line. The middle line CL is a straight line that is halfway between the inner edge of the third edge seal portion 16 and the inner edge of the fourth edge seal portion 17, and is also halfway between the third edge portion 6 and the fourth edge portion 7. As shown in FIG. 1, in this embodiment, the through-hole 24 is formed at a position overlapping the middle line CL that is halfway between the third edge portion 6 and the fourth edge portion 7. It is more preferable that the middle of the through-hole 24 in the direction connecting the third edge 6 and the fourth edge 7 is located on the middle line CL.

<Modifications of the Penetration Part>
The shape of the through-hole may be other than the rectangular shape shown in Figs. 1 and 4. Fig. 5 is a front view of a modified pouch having a through-hole of a different shape. The pouch shown in Fig. 5 is different from the pouch shown in Fig. 1 only in the shape of the through-hole. In the example of Figs. 1 and 4, the shape of the through-hole 24 is a rectangular shape of W1 x W2 when the partition film 23 is opened, and a rectangular shape of W1 x W6 when the partition film 23 is folded in half at the fold-in portion 23a. In the example of the pouch shown in Fig. 5, the shape of the through-hole 24A is an elliptical shape of W3 x W4 (not shown) when the partition film 23 is opened, and a semi-elliptical shape of W3 x W7 when the partition film 23 is folded in half at the fold-in portion 23a. Like W1, W3 is the length along the folded portion 23a and the first edge portion 4, like W2, W4 is the length in the direction intersecting the folded portion 23a, and like W6, W7 is the length in the direction intersecting the folded portion 23a. In the example of Fig. 5, when the partition film 23 is folded in half, the through portion 24A has a semi-elliptical shape, and W3 = 10.0 (mm) and W7 = 8.8 (mm). When the partition film 23 is folded exactly in half at the folded portion 23a, W4 = 2 x W7.

As shown in Figs. 1 and 5, the through-hole 24 is formed at a position that does not overlap the partition seal portion 25 in the direction along the folded portion 23a (left-right direction in Figs. 1 and 5). The through-hole 24 in Fig. 1 and the through-hole 24A in Fig. 5 do not overlap either of the two partition seal portions 25. Since the through-hole 24 is at a position that does not overlap the partition seal portion 25 in the direction along the folded portion 23a, the opening shape of the through-holes 24 and 24A can be appropriately controlled with the partition film 23 appropriately fixed to the front film 1 and the back film 2. The maximum length L5 of the partition seal portion 25 in the direction along the folded portion 23a can be appropriately set within a range that does not overlap the through-holes 24 and 24A.

The partition seal portion 25, in the direction along the folded portion 23a, has a smaller length in the direction intersecting the folded portion 23a as it approaches the penetration portions 24, 24A. Therefore, the partition film 23 is fixed to the front film 1 and the back film 2 over a wider area as it moves away from the penetration portion 24, and the penetration portions 24, 24A are more likely to open widely.

<Storage section>
After the contents are contained through the opening on the second edge 5 side, the second edge seal portion 15 is formed in the first edge seal portion (below the dashed line in FIG. 1) indicated as 15a in FIG. 1, and the pouch is sealed (see FIG. 6). The second edge seal portion 15 is formed along the second edge 5 from the third edge seal portion 16 to the fourth edge seal portion 17. The containing portion 11 is defined by the inner edge of the first edge seal portion 14, the inner edge of the third edge seal portion 16, the inner edge of the fourth edge seal portion 17, and the inner edge of the second edge seal portion 15. Therefore, the inner edge of the first edge seal portion 14, the inner edge of the third edge seal portion 16, the inner edge of the fourth edge seal portion 17, and the inner edge of the second edge seal portion 15 become the outer edge of the containing portion 11. FIG. 6 is a front view of the pouch after the contents are filled and sealed. For convenience of illustration, the contents are omitted.

<Contents>
The contents are not particularly limited, but are preferably solid articles. For example, a tablet-shaped article can be used as the contents. For example, in the case of a spherical solid article, a solid article having a diameter of 5.0 mm to 30 mm is suitable, and a solid article having a diameter of 10 mm to 20 mm is more suitable. In other words, it is suitable for solid articles larger than those in the form of powder or granules (particle size generally less than 1 mm). Also, the contents may be individually packaged articles. Also, the contents may be food or non-food.

<Opening and closing mechanism>
Next, the opening and closing mechanism will be described. As shown in FIG. 1, in the pouch of this embodiment, a fitting 20 is formed along the first edge 4 as an opening and closing mechanism capable of opening and resealing the pouch. The fitting 20 is formed in a state of being connected to the partition film 23. FIG. 3 is a cross-sectional view of the pouch including the fitting 20. FIG. 3(a) is a cross-sectional view corresponding to the line A-A shown in FIG. 1, FIG. 3(b) is a cross-sectional view corresponding to the line B-B shown in FIG. 1, and FIG. 3(c) is a partial enlarged view of the fitting 20 shown in FIG. 3(a) and (b). As shown in FIG. 1 and FIG. 3, the pouch is provided with a freely openable fitting 20 consisting of a first member and a second member that fit together, as an opening and closing mechanism, near the first edge 4 of the containing section 11. In this embodiment, the male member 21 will be described as the first member and the female member 22 as the second member, but the female member 22 may be the first member and the male member 21 may be the second member.

As shown in FIG. 1, the fitting 20, which is strip-shaped in plan view, is provided along the first edge 4. In this embodiment, the longitudinal direction of the fitting 20 is parallel to the first edge 4. As shown in FIGS. 3(a) and 3(b), the fitting 20 has a male member 21 connected to the first portion 23f of the partition film 23. The fitting 20 also has a female member 22 connected to the second portion 23g of the partition film 23.

The male member 21 and the female member 22 will be described in detail. Figure 3(c) is a cross-sectional view of the fitting 20 corresponding to Figures 3(a) and (b). The fitting 20 formed along the first edge 4 can be used as a so-called zipper, and the part connected to the partition film 23 from the first edge 4 side can be opened and resealed. The arrangement of the fitting 20 is not limited to the embodiment shown in Figures 1 and 3(a) and (b), and the male member 21 may be connected to the partition film 23 joined to the front film 1, and the female member 22 may be connected to the partition film 23 joined to the back film 2.

In this embodiment, the fitting 20 is integrally formed with the partition film 23. The material of the partition film 23 including the fitting 20 can be a resin compatible with the sealant layer of the laminated film used as the front film 1 and the back film 2. As shown in FIG. 3, the fitting 20 is composed of a male member 21 and a female member 22, and the first end 23b of the partition film 23 near the male member 21 and the second end 23c near the female member 22 are joined by heat sealing to the inner surface of the front film 1 and the inner surface of the back film 2, respectively. At this time, a heat shield plate (not shown) is interposed between the male member 21 and the female member 22 to prevent the male member 21 and the female member 22 from thermally fusing. The shapes of the male member 21 and the female member 22 are not particularly limited as long as they are shapes that allow them to fit together.

In this embodiment, the film is made of one continuous film from the first end 23b connected to the male member 21 to the second end 23c connected to the female member 22. This continuous partition film 23 is folded back halfway between the first end 23b and the second end 23c to form a folded portion 23a that is closer to the second edge 5 when the pouch is formed. This folded portion 23a is the boundary between the first portion 23f and the second portion 23g of the partition film 23.

1 and 3(a), the partition seal portion 25 is not formed below the fitting 20 near the center between the third edge 6 and the fourth edge 7. Therefore, when the fitting 20 is released after the pouch is opened, the front film 1 and the back film 2 are separated near the middle between the third edge 6 and the fourth edge 7, and the pouch opens widely. On the other hand, as shown in FIG. 1 and 3(b), the partition seal portion 25 below the fitting 20 is formed over a wide area near the fourth edge 7. Similarly, the partition seal portion 25 is formed over a wide area near the third edge 6. Therefore, the partition film 23 is fixed to the front film 1 and the back film 2 near the third edge 6 and the fourth edge 7 and does not open widely.

Second Embodiment
Next, a second embodiment will be described. Fig. 7 is a front view showing a pouch according to a second embodiment of the present invention. The same parts as those in the first embodiment are given the same reference numerals and the description will be omitted. The first embodiment has a basic form of a flat pouch, while the second embodiment has a basic form of a standing pouch that can stand on its own. The pouch according to the second embodiment differs from the first embodiment in the position of the filling port, which is an opening for filling the contents. In the second embodiment, the opening for filling the contents is present on the fourth edge 7 side, not on the second edge 5 side.

The pouch according to the second embodiment has a substantially rectangular bottom film 3 in addition to the front film 1 and back film 2 used in the first embodiment. It also has a fitting 20 and a partition film 23, which serve as an opening and closing mechanism, as in the first embodiment. The penetration portion 24, partition seal portion 25, and fitting seal portion 26 are also formed in the same manner as in the first embodiment.

The pouch of the second embodiment also has a bottom gusset portion 9 with a first pleat portion 9a and a second pleat portion 9b on the second edge portion 5 side. Because it has a bottom gusset portion 9, the pouch can be made to stand on its own by placing it with the first edge portion 4 side facing up and the second edge portion 5 side facing down.

As shown in FIG. 8, the bottom film 3 is folded in half at the fold 3a, and divided into a first part 3f and a second part 3g with the fold 3a as the boundary. The bottom film 3 has four semicircular cutouts 3b, 3c, 3d, and 3e that cut out the side edges, and the cutouts 3b and 3c, and the cutouts 3d and 3e are provided at positions corresponding to when the bottom film 3 is folded in half. The second bottom seal portion 18b, which will be described later, is formed through the cutouts 3b to 3e. In addition, from the viewpoint of stabilizing the self-supporting property, the distance from the fold 3a to the second edge portion 5 of the pouch in the direction perpendicular to the fold 3a can be appropriately set. The fold 3a is also the boundary between the first fold portion 9a and the second fold portion 9b.

<Each seal part>
As shown in Fig. 7, the pouch of the second embodiment includes a first edge seal portion 14, a bottom seal portion 18, and a third edge seal portion 16, and the fourth edge portion 7 side is left unsealed and has an opening for filling the contents. The bottom seal portion 18 includes a first bottom seal portion 18a and a second bottom seal portion 18b. In Fig. 7, each seal portion is indicated by hatching with diagonal lines.

The bottom seal portion 18 is a seal portion formed on the second edge portion 5 side (lower side in FIG. 7) from the folded portion 3a, and is composed of a first bottom seal portion 18a and a second bottom seal portion 18b. The first bottom seal portion 18a is formed by sealing the front film 1 and the first portion 3f of the bottom film 3, and the back film 2 and the second portion 3g of the bottom film 3. The second bottom seal portion 18b is formed by sealing the front film 1 and the back film 2. As shown in FIG. 1, the second bottom seal portion 18b formed on the third edge portion 6 and the fourth edge portion 7 has a semicircular shape with an arc-shaped inner side.

<Bottom gusset>
A first portion 3f of the bottom film 3 and a portion of the front film 1 corresponding to the first portion 3f of the bottom film 3 are joined by a first bottom seal portion 18a to form a first pleat portion 9a. A second portion 3g of the bottom film 3 and a portion of the back film 2 corresponding to the second portion 3g of the bottom film 3 are joined by a first bottom seal portion 18a to form a second pleat portion 9b. The first pleat portion 9a and the second pleat portion 9b form a bottom gusset portion 9. In the front view of FIG. 7, the first pleat portion 9a is visible below the fold-in portion 3a, and the second pleat portion 9b is hidden.

In the pouch of the second embodiment, a portion of the fourth edge 7 between the fold-in portion 23a of the partition film 23 and the fold-in portion 3a of the bottom film 3 is left unsealed, forming the fourth edge to be sealed portion 17a (to the right of the two-dot chain line in FIG. 7).

In the pouch of the second embodiment, as shown in FIG. 7, the contents are accommodated through the opening on the unsealed fourth edge 7 side, and then the fourth edge seal portion 17 is formed in the fourth edge seal portion 17a, and the pouch is sealed. FIG. 9 is a front view of the pouch of the second embodiment after the contents are filled and sealed. For convenience of illustration, the contents are omitted. As a result, the fourth edge seal portion 17 is formed along the fourth edge 7 from the first edge 4 to the upper end of the first bottom seal portion 18a. The portion formed in the fourth edge seal portion 17a may have a different seal width than the fourth edge seal portion 17 formed before filling, and may be wider. The accommodation portion 11 is defined by the inner edge of the first edge seal portion 14, the inner edge of the first bottom seal portion 18a, the inner edge of the third edge seal portion 16, and the inner edge of the fourth edge seal portion 17.

Other features are the same as those of the first embodiment, and the opening and closing mechanism, the fitting 20, consists of a male member 21 and a female member 22 that fit together, and the male member 21 and the female member 22 are joined to the different side of the front film 1 and the back film 2 via a partition film 23 that is connected to each other.

In the example shown in Figures 7 and 9, the third edge seal portion 16 is formed first on the third edge portion 6, and the fourth edge portion 7 side is used as the opening for filling the contents, but since the third edge portion 6 and the fourth edge portion 7 are symmetrical to each other, the fourth edge seal portion 17 may be formed first on the fourth edge portion 7, and the third edge portion 6 side may be used as the opening for filling the contents. However, after filling and sealing, a seal portion will be formed on both the third edge portion 6 and the fourth edge portion 7 side to seal them.

<Storage section>
After the contents are contained through the opening on the fourth edge 7 side, the fourth edge seal portion 17 is formed at the fourth edge seal portion (right side of the two-dot chain line) indicated as 17a in FIG. 7, and the pouch is sealed (see FIG. 9). The fourth edge seal portion 17 is formed along the fourth edge 7. The containing portion 11 is defined by the inner edge of the first edge seal portion 14, the inner edge of the third edge seal portion 16, the inner edge of the fourth edge seal portion 17, and the inner edge of the first bottom seal portion 18a. Therefore, the inner edge of the first edge seal portion 14, the inner edge of the third edge seal portion 16, the inner edge of the fourth edge seal portion 17, and the inner edge of the first bottom seal portion 18a become the outer edge of the containing portion 11. FIG. 9 is a front view of the pouch after the contents are filled and sealed. For convenience of illustration, the contents are omitted.

<Film details>
A laminated film can be used as the front film 1, the back film 2, and the bottom film 3 of the pouch in the first and second embodiments. The laminated film is a laminate including at least a base layer and a sealant layer from the outside. For example, the laminated film is formed by laminating a base layer, a printed layer, other layers (e.g., a barrier layer), and a sealant layer in this order from the outside. The printed layer and other layers are not essential. An adhesive layer can also be used to laminate these layers. The sealant layer is a layer that constitutes the innermost surface of the pouch. The pouch according to this embodiment is required to be resistant to heat. For this reason, the base layer is preferably made of a material having heat resistance. For example, polyester films such as polyethylene terephthalate and polybutylene terephthalate, polyamide films such as nylon, polypropylene films, etc. can be used as the material of the base layer. Paper may also be used as the material of the base layer. The thickness is about 10 μm to 50 μm. The base layer is preferably biaxially stretched.

The laminated film may also have multiple substrate layers. The multiple substrate layers may include a first substrate layer and a second substrate layer. The first substrate layer and the second substrate layer may be selected from the above materials in appropriate combination. For example, polyethylene terephthalate may be used as the first substrate layer, which is the outermost layer, and polyamide may be used as the second substrate layer, which is the inner layer (sealant layer side). The second substrate layer is stretched from one side edge to the other side edge. For example, the second substrate layer may be "EMBLEM (registered trademark) NC" manufactured by Unitika Ltd., which contains MXD (metaxylenediamine) having excellent barrier properties. For the second substrate layer, polyester such as "EMBLET (registered trademark) PC" manufactured by Unitika Ltd. or "EMBLET (registered trademark) PCBC" manufactured by Unitika Ltd. may also be used. The first substrate layer and the second substrate layer may be laminated, for example, by a dry lamination method.

The printing layer is provided to display the product contents, to impart an aesthetic look, and to display cut portions. The printing layer is formed from printing ink containing a binder and a pigment. The sealant layer is placed on the side of the laminated film that will be the innermost side of the container when the film is made into a pouch. Polyolefin resins such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, and ethylene-propylene block copolymer can be used as the material for the sealant layer. The thickness of the sealant layer is 30 μm or more and 150 μm or less. It is preferable that the sealant layer is unstretched.

The laminated film may include other layers. The other layers may be provided on the outside of the base layer, or between the base layer and the sealant layer. As the other layers, appropriate ones are selected according to the required functions, such as water vapor and other gas barrier properties, light shielding properties, etc. For example, when the other layer is a gas barrier layer, a vapor deposition layer of a metal oxide such as aluminum oxide or an inorganic oxide such as silicon oxide is provided. The vapor deposition layer may be laminated on the base layer or may be vapor deposited on the sealant layer. In addition, a resin layer having gas barrier properties, such as ethylene-vinyl alcohol copolymer (EVOH), polyvinylidene chloride resin (PVDC), or aromatic polyamide such as nylon MXD6, may be provided. Each layer can be laminated using a dry lamination method, a melt extrusion method, or the like.

Specific examples of the layer structure of a laminated film include the following. Of course, this is not limited to the following.

Polyethylene terephthalate (PET) 12 μm / printing layer (ink) / adhesive / aluminum (ALM) foil 7 μm / adhesive / linear low-density polyethylene (LLDPE) 60 μm
・Transparent vapor-deposited PET 12 μm/printing layer (ink)/adhesive/oriented nylon (ONY) 15 μm/adhesive/non-oriented polypropylene (CPP) 60 μm
・Transparent vapor-deposited PET 12μm/printing layer (ink)/adhesive/LLDPE 80μm
Printing layer (ink) / PE 25 μm / adhesive / PE (PE / EVOH / PE) 80 μm
Printing layer (ink)/paper (basis weight 80 g/m ² )/adhesive/PET 12 μm/adhesive/PE 80 μm
Printing layer (ink)/paper (basis weight 23 g/m ² )/adhesive/ALM foil 7 μm/adhesive/LLDPE 50 μm

The substrate layer with the transparent vapor deposition also functions as a barrier layer. The total thickness of the laminated film is not particularly limited, but is preferably 75 μm or more and 130 μm or less.

The partition film 23 formed integrally with the fitting 20 can be made of polyethylene (PE), polypropylene (PP) or a blend of polyethylene and polypropylene. However, it must be a resin that is compatible with the sealant layer of the laminated film used as the front film 1 and back film 2. The thickness of the partition film 23 other than the fitting 20 is preferably 50 μm or more and 200 μm or less.

<Modifications of Partition Film>
Next, a modified example of the partition film will be described. In the example of FIG. 1, a configuration in which the fitting 20 is integrally formed with the partition film 23 has been described. The fitting and the partition film do not necessarily have to be integrally formed. Next, a modified example in which the fitting and the partition film are separate will be described. FIG. 10 is a front view showing a pouch according to the modified example. FIG. 11 is a cross-sectional view of a pouch according to a modified example of a portion including the fitting 30. FIG. 11(a) is a cross-sectional view corresponding to the line D-D shown in FIG. 10, and FIG. 11(b) is a cross-sectional view corresponding to the line E-E shown in FIG. 10. In FIG. 10, the same parts as those in the example shown in FIG. 1 are denoted by the same reference numerals and will not be described.

In the examples of Figs. 10 and 11, the fitting 30 and the partition film 33 are separate. The fitting 30 is composed of a male member 31 and a female member 32 that fit together. As shown in Fig. 11, the male member 31 has a base connected to a male fitting portion, and the base is joined to the front film 1 by a fitting seal portion 36. Similarly, the female member 32 has a base connected to a female fitting portion, and the base is joined to the back film 2 by a fitting seal portion 36. The fitting seal portion 36 has a band-like shape in a plan view, and is formed in two places, near the first edge portion 4 and near the second edge portion 5, for each of the male member 31 and the female member 32. Such a fitting 30 and a joining method to the film can be a known method. It is preferable that the width of the fitting 30 in the direction connecting the first edge portion 4 and the second edge portion 5 is 4 mm or more and 13 mm or less. In addition, the width of the fitting seal portion 36 in the direction connecting the first edge portion 4 and the second edge portion 5 is preferably 1 mm or more and 4 mm or less. For example, the preferred width of the fitting seal portion 36 can be 2 mm.

The partition film 33 in the modified example has a folded portion 33a and a through portion 34 on the straight line where the folded portion 33a is located. The folded portion 33a is a portion that is folded so as to be located on the second edge portion 5 side when the pouch is completed. The partition film 33 is divided into a first portion 33f and a second portion 33g with the folded portion 33a as the boundary. The first end 33b and the second end 33c, which are the two ends farthest from the folded portion 23a, are located closest to the first edge portion 4 when the pouch is completed.

The partition film 33 has a first portion 33f joined to the front film 1 and a second portion 33g joined to the back film 2 by the partition seal portion 35 and the connecting seal portion 37. The partition film 33 is also joined integrally to the front film 1 and the back film 2 by the third edge seal portion 16 and the fourth edge seal portion 17. The first portion 33f and the second portion 33g of the partition film 33 are also joined to each other at the third edge seal portion 16 and the fourth edge seal portion 17.

The through-hole 34 is formed in the same position and has the same shape as the through-hole 24 shown in FIG. 1. It can also be formed in the same shape as the through-hole 24A shown in FIG. 5. As shown in FIG. 10, the through-hole 34 is formed in a position that does not overlap with the partition seal portion 35 in the direction along the folded portion 33a (the left-right direction in FIG. 10). Since the through-hole 34 is in a position that does not overlap with the partition seal portion 35 in the direction along the folded portion 33a, the opening shape of the through-hole 34 can be appropriately controlled with the partition film 33 appropriately fixed to the front film 1 and the back film 2. The maximum length L5 of the partition seal portion 35 in the direction along the folded portion 33a can be appropriately set within a range that does not overlap with the through-hole 34.

The partition seal portion 35, in the direction along the folded portion 33a, has a smaller length in the direction intersecting the folded portion 33a as it approaches the through-hole portion 34. Therefore, the partition film 33 is fixed to the front film 1 and the back film 2 over a wider area as it moves away from the through-hole portion 34, and the through-hole portion 34A is more likely to open widely.

The connecting seal portion 37 is a seal portion that extends in a direction along the folded portion 33a. The connecting seal portion 37 connects the two partition seal portions 35. In this embodiment, the edges of the two partition seal portions 35 and the connecting seal portion 37 that are closer to the first edge portion 4 are on the same straight line and are parallel to the first edge portion 4 and the folded portion 33a.

10, as in FIG. 1, L4 is the maximum length of the partition seal portion 35 in the direction intersecting the folded portion 33a (the direction connecting the first edge portion 4 and the second edge portion 5), and L5 is the maximum length of the partition seal portion 35 in the direction along the folded portion 33a (the third edge portion 6 and the fourth edge portion 7). The length L4 is preferably 18 mm or more and 30 mm or less. For example, it can be set to a preferred value of 23 mm. Also, in FIG. 10, L6 is the width of the connecting seal portion 37 in the direction intersecting the folded portion 33a (the direction connecting the first edge portion 4 and the second edge portion 5). The width L6 of the connecting seal portion 37 is preferably 2 mm or more and 5 mm or less. For example, it can be set to a preferred value of 3 mm.

The fitting 30 can be made of polyethylene (PE), polypropylene (PP) or a blend of polyethylene and polypropylene. However, the resin must be compatible with the sealant layer of the laminated film used as the front film 1 and back film 2. The partition film 23, when separate from the fitting 30, can be made of linear low-density polyethylene (LLDPE) or non-oriented polypropylene (CPP). However, the resin must be compatible with the sealant layer of the laminated film used as the front film 1 and back film 2. The thickness of the partition film 33 is preferably 50 μm or more and 200 μm or less.

<Production Method>
A method for manufacturing a pouch according to the first embodiment as shown in Fig. 1 will be described. Fig. 4 is a cross-sectional view of a partition film 23 integrally formed with a fitting 20, which is an opening/closing mechanism. As described above, the partition film 23 has a male member 21 and a female member 22 folded back at a fold-in portion 23a. The fitting 20 is formed as a single film in which the male member 21 and the female member 22 are continuous. This single film may have a single layer structure, or may be a laminated film made up of multiple layers.

First, prepare a partition film 23 integrally formed with the fitting 20 as shown in FIG. 4. Specifically, a resin molding process is performed to form the male member 21 and the female member 22 at a predetermined position. The partition film 23 on which the male member 21 and the female member 22 are formed may be purchased and prepared. Next, a through hole 24 is formed at a position midway between the first end 23b and the second end 23c. Then, a predetermined position on the partition film 23 is folded back as a folded portion 23a. Next, prepare a front film 1 and a back film 2, and heat seal the first portion 23f and the second portion 23g of the partition film 23 to the inner surfaces of the front film 1 and the back film 2, respectively. The partition film 23 is joined to the inner surfaces of the front film 1 and the back film 2 by the partition seal portion 25 and the fitting seal portion 26 formed in this way.

Then, the first edge seal 14 is formed by heat sealing. Furthermore, after that, the third edge seal 16 and the fourth edge seal 17 are formed by heat sealing. The second edge 5 side is left unsealed, and an opening is formed for filling the contents. By cutting the long continuous film between the third edge seal 16 and the fourth edge seal 17, each individual piece is separated from the continuous film, and a pouch as shown in FIG. 1 is obtained.

A pouch such as that shown in FIG. 1 may be sold or distributed with the second edge 5 unsealed. Furthermore, after the contents are placed in the storage section 11 through the opening of the unsealed second edge 5, the second edge seal section 15 is formed along the second edge 5 to seal the pouch. This results in a sealed pouch such as that shown in FIG. 6. Note that in reality, the pouch is sealed with the contents placed therein, but the contents have been omitted from FIG. 6 for convenience of illustration.

A method for manufacturing a pouch according to the modified example shown in FIG. 10 will be described. In this case, the fitting 30 and the partition film 33, which are sold as zipper tape, are prepared by purchase or the like. Then, a predetermined position on the partition film 33 is folded back as the folded portion 23a. The male member 31 and the female member 32 of the fitting 30 and the folded partition film 33 are run parallel to each other on a bag making machine. Next, a through portion 34 is formed at the midpoint between the first end 33b and the second end 33c. Next, the front film 1 and the back film 2 are prepared, and the first portion 33f and the second portion 33g of the partition film 33 are heat-sealed to the inner surfaces of the front film 1 and the back film 2, respectively. The partition seal portion 35 and the connecting seal portion 37 thus formed join the partition film 33 to the inner surfaces of the front film 1 and the back film 2.

Then, the first edge seal 14 is formed by heat sealing. Then, the third edge seal 16 and the fourth edge seal 17 are formed by heat sealing. The second edge 5 side is left unsealed, and an opening is formed for filling the contents. By cutting the long continuous film between the third edge seal 16 and the fourth edge seal 17, each piece is separated from the continuous film, and a pouch as shown in FIG. 10 is obtained.

<Scheduled opening line>
As shown in Figures 1, 6, 7, 9, and 10, in the above embodiment, the opening line 12 is formed between the first edge seal portion 14 and the fitting 20. The opening line 12 is formed parallel to the first edge portion 4 and the fitting 20. The opening line 12 is a half-cut line that penetrates the base layer and does not penetrate the sealant layer. In the case of a half-cut line, the opening line 12 may be formed using a blade or by laser processing. In addition, in the case of a half-cut line, the opening line 12 may be a line that extends continuously or may be a line that extends intermittently. In addition, the opening line 12 may be provided so as to extend from the third edge portion 6 to the fourth edge portion 7 of the pouch.

The opening line 12 may be realized by a straight-cut film. A straight-cut film is a film that can be torn linearly in one direction. The straight-cut film has a tensile strength in the MD direction (film flow direction) greater than the tensile strength in the TD direction (direction perpendicular to the MD direction). When the opening line 12 is realized by a straight-cut film, a straight-cut film is used for at least one of the base layer and the sealant layer. When a straight-cut film is used for the base layer, for example, Emblet (registered trademark) PC or Emblem (registered trademark) NC manufactured by Unitika Co., Ltd. can be used as the base layer. The tensile strength of Emblet (registered trademark) PC in the MD direction is 200 MPa, and the tensile strength in the TD direction is 180 MPa. When a straight-cut film is used for the sealant layer, for example, DC061 manufactured by Toyobo Co., Ltd. can be used as the sealant layer.

When creating a planned opening line using straight-cut film, the film can be opened at any position along the first edge 4. For this reason, if there is no indication, it is difficult to determine where to cut. Therefore, when creating a planned opening line using straight-cut film, the planned opening line is indicated by printing. For example, the position of the planned opening line 12 can be determined by actually printing a line at the position of the planned opening line shown by the dashed line in Figures 1 and 7.

In addition, in this embodiment, in order to facilitate opening, an opening initiation means 13 is provided in addition to the planned opening line 12. In this embodiment, as the opening initiation means 13, a cut, also called a notch, is provided on both the third edge 6 and the fourth edge 7. Specifically, it is formed on an extension of the planned opening line 12. The notch is not limited to a cut, but may be a notch. The opening initiation means 13 may be provided on only one of the third edge 6 and the fourth edge 7. Note that if the opening can be easily performed using only the planned opening line 12, the opening initiation means 13 does not need to be provided.

Even if the intended opening line 12 is not a half-cut line, a straight-cut film, or a printed marking, if an opening initiation means 13 such as a notch is formed on at least one of the third edge 6 and the fourth edge 7, a line passing through the opening initiation means 13 and parallel to the first edge 4 and the fitting 20 is defined as the intended opening line.

<How to use>
A method of using the pouch according to this embodiment as shown in Fig. 6 will be described. First, the pouch is opened by cutting the first edge 4 side along the intended opening line 12. Next, the fitting device 20 is released. That is, by releasing the engagement between the male member 21 and the female member 22, an opening is formed that connects the first edge 4 side to the partition film 23.

In this state, the contents can be taken out of the storage section 11 through the penetration section 24. FIG. 12 is a diagram showing the state of the pouch after the first edge 4 side is cut along the opening line 12. FIG. 12(a) is a top view seen from the first edge 4 side. FIG. 12(b) is a perspective view of the pouch in a tilted state. In FIG. 12, the opening portion caused by the penetration section 24 is shown by diagonal hatching. After opening, when the third edge 6 and the fourth edge 7 are pushed toward the center of the storage section 11, the front film 1 and the back film 2 are separated from each other, as shown in FIG. 12(a), and the penetration section 24 is expanded. At this time, since the partition seal section 25 is formed in a shape that narrows as it approaches the second edge 5 side, the angle that the opening surface caused by the penetration section 24 makes with the front film 1 and the back film 2 becomes close to a right angle. Therefore, by widening the opening created by the penetration portion 24 and tilting the pouch as shown in FIG. 12(b), the solid contents N can be easily removed.

Example 1
A transparent vapor-deposited polyethylene terephthalate (PET) film having a thickness of 12 μm was used as the substrate layer, and a non-oriented polypropylene (CPP) film having a thickness of 60 μm was used as the sealant layer. Specifically, a printed layer was first formed on the inner surface of a transparent vapor-deposited PET film having a thickness of 12 μm, which was to be the substrate layer. Then, a stretched nylon (ONY) film having a thickness of 15 μm was bonded to the printed layer side through an adhesive layer. Furthermore, a CPP film having a thickness of 60 μm was bonded to the ONY film side through an adhesive layer. As a result, a packaging material was obtained that was a laminated film having a layer structure of transparent vapor-deposited PET 12 μm/printed layer (ink)/adhesive layer/ONY 15 μm/adhesive layer/CPP 60 μm. The adhesive layer was a cured product of an acrylic polyol and an isocyanate compound.

The obtained laminated film, which is the packaging material, was cut to 110 mm x 170 mm to form the front film 1 and the back film 2. Furthermore, a partition film 23 made of polypropylene compatible with the CPP, which is the sealant layer, was prepared to a size of 110 mm x 48 mm. The thickness of the partition film 23 excluding the fitting 20 was set to 60 μm. Furthermore, a punching die was used to form a through-hole 24 of 15.0 mm x 30.0 mm at a position including a line segment where the folded portion 23a was to be formed. Then, a heat shield plate (not shown) was interposed between the male member 21 and the female member 22, and heat sealing was performed to form the partition seal portion 25 and the fitting seal portion 26. The partition seal portion 25 and the fitting seal portion 26 joined the first portion 23f of the partition film 23 to the inner side of the front film 1 and the second portion 23g of the partition film 23 to the inner side of the back film 2, respectively.

Next, the front film 1 and the back film 2 were used to form the pouch according to the first embodiment shown in FIG. 1 (the pouch without the second edge seal portion 15). After that, the contents were filled into the storage portion 11 from the second edge 5 side with individually wrapped candy.

Then, the second edge seal portion 15 was formed to form the pouch shown in FIG. 6. The seal width of the first edge seal portion 14 was 15 mm, the seal width of the second edge seal portion 15 was 5 mm, and the seal width of the third edge seal portion 16 and the fourth edge seal portion 17 was 5 mm. The distance L1 (pouch width) between the third edge portion 6 and the fourth edge portion 7 was 110 mm, the distance L2 (pouch height) between the first edge portion 4 and the second edge portion 5 was 170 mm, the distance L3 from the folded portion 23a to the first edge portion 4 of the pouch was 47 mm, the length W1 of the through portion 24 in the direction along the folded portion 23a and the first edge portion 4 was 15 mm, and the length W2 of the through portion 24 in the direction intersecting the folded portion 23a was 15 mm.

Example 2
A pouch according to the first embodiment was formed in the same manner as in Example 1, except that the thickness of the partition film 23 excluding the fitting 20 was set to 100 μm, and the through hole formed in the partition film 23 was set to the semi-elliptical through hole 24A shown in Figure 5.

<Comparative Example 1>
A pouch having a partition film 23 with a rectangular through-hole 24 was formed in the same manner as in Example 1, except that the partition seal portion 25 was not provided.

<Comparative Example 2>
A pouch having a partition film 23 with a semi-elliptical through-hole 24A was formed in the same manner as in Example 2, except that the partition seal portion 25 was not provided.

<Evaluation of Ease of Removal>
The pouches of the examples and the comparative examples were evaluated. Specifically, the pouches were evaluated in terms of two points: opening property and take-out property. The opening property is an index showing whether the through-holes 24 and 24A open widely when a force is applied to the third edge 6 and the fourth edge 7 toward the storage section 11 side, as shown in FIG. 12(a). The take-out property is an index showing whether the contents can be easily taken out from the opening when the first edge 4 side is tilted in a state where a force is applied to the third edge 6 and the fourth edge 7 toward the storage section 11 side, as shown in FIG. 12(b). The opening property was evaluated by checking the state of the through-holes 24 and 24A, and when the through-holes 24 and 24A were not crushed and were open widely toward the storage section 11 when visually observed from the first edge 4 side, it was evaluated as ◯, and when the opening leading to the inside of the storage section 11 was crushed, it was evaluated as ×. Regarding the ease of removal, when 20 pellets of solid contents N were contained and one or two pellets came out when the container was tilted slightly, the evaluation was made as ◯, and when three or more pellets came out, the evaluation was made as ×. The evaluation results are shown in Table 1.

As shown in Table 1, in Examples 1 and 2, which have a partition seal portion, good opening and removal properties were confirmed, regardless of the thickness of the partition film or the shape of the penetration portion. On the other hand, in Examples 1 and 2, which do not have a cut seal portion, both opening and removal properties were insufficient, regardless of the thickness of the partition film or the shape of the penetration portion. This is thought to be because, without the partition seal portion, the partition film separates from the front film 1 and back film 2, making it impossible to keep the penetration portion wide open.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and various modifications are possible. Furthermore, the contents of the above embodiments and modifications can be combined in various ways as long as no contradictions arise in the combination. For example, a structure in which the fitting device and the partition film are separate may be applied to the standing pouch of the second embodiment.

In addition, in the above embodiment, the front surface film 1 and the back surface film 2 are defined as the "front" and "back" for convenience of explanation. Since the front surface film 1 and the back surface film 2 are symmetrical to each other, either may be the "front" and either may be the "back". Since the third edge portion 6 and the fourth edge portion 7 are also symmetrical to each other, either may be the third edge portion and either may be the fourth edge portion.

In the above embodiment, the front film 1, back film 2, and bottom film 3 are each formed as separate films to form the pouch, but they may be formed of two or one film. For example, in the second embodiment, one film may be used in which the front film 1, bottom film 3, and back film 2 are connected together, or two films may be used in total, including the film forming the front film 1 and the film in which the back film 2 and bottom film 3 are connected together. When one film in which the front film 1, bottom film 3, and back film 2 are connected together is used, the bottom gusset portion 9 can be formed by folding the single film twice at the second edge portion 5 and once at the fold-in portion 3a without forming a seal portion at the second edge portion 5.

1: Front film 2: Back film 3: Bottom film 3a: Fold-in portion 3f: First portion of bottom film 3g: Second portion of bottom film 4: First edge portion 5: Second edge portion 6: Third edge portion 7: Fourth edge portion 9: Bottom gusset portion 9a: First pleat portion 9b: Second pleat portion 11: Storage portion 12: Planned opening line 13: Opening start means 14: First edge seal portion 15: Second edge seal portion 15a: Planned second edge seal portion 16: Third edge seal portion 17: Fourth edge seal portion 17a: Planned fourth edge seal portion 18: Bottom seal portion 18a: First bottom seal portion 18b: Second bottom seal portion 20, 30: Fitting (opening/closing mechanism)
21, 31: Male member 22, 32: Female member 23, 33: Partition film 23a, 33a: Fold-in portion 23b, 33b: First end (of fitting) 23c, 33c: Second end (of fitting) 23f: First portion of partition film 23g: Second portion of partition film 24, 24A: Penetration portion 25, 35: Partition seal portion 26, 36: Fitting seal portion 37: Connecting seal portion L1: Distance between third edge portion 6 and fourth edge portion 7 (width of pouch)
L2: Height of the pouch between the first edge 4 and the second edge 5
L3: Distance from the folded-in portion 23a to the first edge portion 4 of the pouch L4: Maximum length of the partition seal portion 25 in a direction intersecting with the folded-in portion 23a L5: Maximum length of the partition seal portion 25 in a direction along the folded-in portion 23a L6: Width of the connecting seal portion 37 in a direction intersecting with the folded-in portion 33a (direction connecting the first edge portion 4 and the second edge portion 5).
W1, W3: Length of the through-holes 24, 24A in the direction along the folded-in portion 23a W2, W4: Length of the through-holes 24, 24A in the direction intersecting the folded-in portion 23a W6, W7: Length of the through-holes 24, 24A in the direction intersecting the folded-in portion 23a when the partition film is folded CL: Midline between the third edge portion 6 and the fourth edge portion 7

Claims (6)

A pouch having a storage portion between a front film and a back film,
A first edge portion;
a second edge portion opposite the first edge portion;
a third edge and a fourth edge extending between the first edge and the second edge;
an opening/closing mechanism formed between the first edge portion and the second edge portion and closer to the first edge portion;
a partition film having a folding portion on the second edge side and joined to the front film and the back film by two partition seal portions at a position closer to the second edge than the opening/closing mechanism;
The partition film has a through-hole at a position including the folded portion,
The pouch, wherein the through portion is formed at a position that does not overlap with the partition seal portion in a direction along the folded portion. The pouch according to claim 1, wherein the length of the partition seal portion in the direction intersecting the fold-in portion decreases as the partition seal portion approaches the penetration portion in the direction along the first edge portion. The pouch according to claim 1 or 2, further comprising a connecting seal portion that connects the two partition seal portions. The pouch according to claim 1 or 2, wherein the opening/closing mechanism and the partition film are integrally formed. The pouch according to any one of claims 1 to 4, wherein the through-hole is formed at a position overlapping the midline between the third edge and the fourth edge. The pouch according to any one of claims 1 to 5, having a bottom gusset portion on the second edge side.