JP2020100449A - Pouch - Google Patents

Abstract

To provide a pouch including a steam releasing mechanism capable of appropriately releasing steam in a storing portion to an outside.SOLUTION: The pouch includes a sealed portion where films facing each other are bonded together, a non-sealed portion where the films facing each other are not bonded together, and a wing portion. The sealed portion has an outer edge seal portion extending along an outer edge of the pouch, and a protruding seal portion connected to the outer edge seal portion and protruding toward an intermediate point of the storing portion. The non-sealed portion has a first non-sealed portion that is in contact with an inner edge of the protruding seal portion and defines a storing portion where contents are stored. The outer edge of the pouch includes a first upper edge that forms an outer edge of the wing portion, a second upper edge, and a lower edge that faces the first upper edge and the second upper edge. A distance from the first upper edge to the lower edge is shorter than a distance from the second upper edge to the lower edge. The protruding seal portion is connected to a first upper edge seal portion of the outer edge seal portion, which is formed with the films bonded together along the first upper edge. The protruding seal portion has a substantially pentagonal contour.SELECTED DRAWING: Figure 1

Description

The present invention relates to a bag containing a film and containing contents.

BACKGROUND ART Conventionally, a large amount of cooked or semi-cooked liquid, viscous substance, or contents in which liquid and solid are mixed is filled and sealed in a bag made of a plastic film, and it is on the market. The contents are, for example, cooked foods such as curry, stew and soup. In the bag, the non-sealed portion in which the films are not bonded to each other defines a storage portion in which the contents are stored. In addition, the seal part in which the films are joined together seals the housing part. A microwave oven is widely used as a means for heating and cooking the contents.

By the way, when the contents in the bag are heated using a microwave oven, the water contained in the contents evaporates with the heating and the pressure in the accommodating portion of the bag increases. If the pressure in the accommodating portion of the bag increases, the bag may be broken and the contents may be scattered to contaminate the inside of the microwave oven. In consideration of such a problem, it has been proposed to provide a vapor venting mechanism that communicates with the accommodating portion when the pressure in the accommodating portion of the bag is equal to or higher than a predetermined value and allows the vapor in the accommodating portion to escape to the outside. For example, Patent Document 1 discloses, as a vapor removal mechanism, forming a protruding seal portion that protrudes inwardly in a V shape from a seal portion that extends along the outer edge of the bag, in a part of the seal portion.

JP, 2002-80072, A

As a result of intensive studies by the inventors of the present invention, in the bag disclosed in Patent Document 1, there was a case where vapor could not be appropriately escaped from the V-shaped protruding seal portion to the outside. For example, in a bag provided with a V-shaped protruding seal portion that protrudes inward from the seal portion at the upper edge of the bag, when the pressure in the containing portion increases, the seal portion at the side edge of the bag or its periphery is destroyed and the bag is destroyed. In some cases, the contents leaked out from the side edge of the.

The present invention has been made in consideration of such a point, and an object of the present invention is to provide a bag provided with a vapor escape mechanism capable of appropriately escaping the vapor in the housing portion to the outside.

The present invention is a bag containing a film and containing contents, wherein a sealing part in which the opposing films are bonded together, a non-sealing part in which the opposing films are not bonded together, and a wing part , The seal portion has an outer edge seal portion extending along an outer edge of the bag, and a protruding seal portion connected to the outer edge seal portion, the non-seal portion of the protruding seal portion. It has a first non-sealing portion that is in contact with an inner edge and defines a storage portion for storing the contents, and the outer edge of the bag has a first upper edge that constitutes an outer edge of the wing portion and a second upper edge. An edge and a lower edge facing the first upper edge and the second upper edge, and a distance from the first upper edge to the lower edge is a distance from the second upper edge to the lower edge. Shorter than the above, the protruding seal part is connected to a first upper edge seal part of the outer edge seal part formed by joining the films along the first upper edge. Of these, a portion farthest from one outer edge of the bag along the outer edge seal portion to which the projecting seal portion is connected is referred to as a tip point, and in a direction orthogonal to the one outer edge of the bag. When a straight line that extends and passes through the tip point is referred to as a center line, and a point located on the center line and located in the middle of the accommodation portion in the orthogonal direction is referred to as a middle point, the protruding seal portion is the middle point. When projecting two inscribed straight lines that pass through the intermediate point and contact the inner edge of the projecting seal part at inner contact points, the projecting seal part projects toward the outer side of the inner contact point. A pair of first portions located on the edge side and located between the two inscribed straight lines, and located on the intermediate point side with respect to the inner contact and located between the two inscribed straight lines, A pair of second portions connected at the tip point, and the pair of first portions and the pair of second portions are configured such that the protruding seal portion has a substantially pentagonal contour. It is a bag.

Preferably, the angle formed by the pair of second portions at the tip point is 90° or more and less than 180°.

Preferably, a distance between the outer edge seal part to which the protruding seal part is connected and the inner contact in the orthogonal direction is 3 mm or more. Further, preferably, a distance between the tip point and the inner contact in the orthogonal direction is 3 mm or more.

Preferably, a distance between the outer edge seal part to which the protruding seal part is connected and the inner contact in the orthogonal direction is referred to as a first distance, and the tip point and the inner contact in the orthogonal direction. When the distance between and is referred to as a second distance, the first distance is shorter than the second distance.

In the bag of the present invention, each of the pair of first portions and the pair of second portions may be line-symmetric with respect to the center line.

In the bag of the present invention, the film includes a first film and a second film, and an intermediate film arranged between the first film and the second film in a folded state, the intermediate film May be located at the first upper edge and the other end of the intermediate film may be located at the second upper edge.

According to the present invention, the projecting seal part projecting toward the non-sealing part defining the accommodating part has two inscribed straight lines which are in contact with the inner edge of the projecting seal part from the midpoint of the accommodating part at the inner contact. In this case, a pair of first portions located on the outer edge side of the bag with respect to the inner contact and between two inscribed straight lines, and two inscribed straight lines located on the intermediate point side with respect to the inner contact. A pair of second portions located between and connected at the tip point. The pair of first portions and the pair of second portions are configured such that the protruding seal portion has a substantially pentagonal contour. In this case, the force generated by the increased pressure in the housing portion is unlikely to act on the pair of first portions. Therefore, it is possible to prevent the films from peeling from each other in the pair of first portions. This can prevent the peeling of the films from reaching the outer edge seal portion connected to the protruding seal portion. Therefore, it is possible to prevent the contents from leaking from the bag.

1 is a front view showing a bag according to an embodiment of the present invention. It is sectional drawing which shows the case where the bag shown in FIG. 1 is seen along the II-II line. It is a figure which expands and shows the vapor|steam release mechanism of the bag shown in FIG. It is sectional drawing which shows the case where the vapor|steam removal mechanism shown in FIG. 3 is seen along the IV-IV line. It is sectional drawing which shows an example of the laminated constitution of a film. It is a figure which shows the process of preparing the film which comprises a bag. It is a figure which shows the process of joining films and forming a seal part. It is a figure which shows the process of cutting a film along the outline of a bag. It is a figure which shows the process of sealing the bag with which the content was filled up. It is a figure which shows a mode that the pressure of the accommodating part of a bag increases and an expansion part is formed. It is a figure explaining the force which acts on a vapor escape mechanism resulting from an expansion part. It is a figure explaining the force which acts on a vapor escape mechanism resulting from an expansion part. It is a figure which shows a mode that a part of protruding seal part of a vapor|steam removal mechanism is destroyed. It is a figure which shows the example of a changed completely type of vapor|steam removal mechanism. It is a figure which shows the example of a changed completely type of vapor|steam removal mechanism. It is a figure which shows the example of a changed completely type of vapor|steam removal mechanism. It is a figure which shows the example of a changed completely type of vapor|steam removal mechanism. It is a figure which shows the example of a changed completely type of vapor|steam removal mechanism. It is a figure which shows the example of a changed completely type of bag. It is a figure which shows the example of a changed completely type of bag. It is a figure which shows the vapor|steam evacuation mechanism of the bag which concerns on a comparative example.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 6C. In addition, in the drawings attached to the present specification, for convenience of illustration and understanding, the scale, the dimensional ratio in the length and width, and the like may be exaggerated by appropriately changing them from the actual ones.

Further, as used in the present specification, the shape and geometric conditions and the degree thereof are specified. For example, terms such as “parallel”, “orthogonal”, and “identical” and length and angle values are strict. Without being bound by the meaning, it should be interpreted including the range in which similar functions can be expected.

FIG. 1 is a front view showing a bag 10 according to this embodiment. 2 is a cross-sectional view showing a case where the bag 10 shown in FIG. 1 is viewed along the line II-II. The bag 10 includes a storage portion 15 that stores the contents. 1 and 2, the bag 10 is shown in a state before being filled with the contents.

As shown in FIG. 1, the bag 10 according to the present embodiment includes a vapor escape mechanism 30 for releasing the vapor generated when heating the contents contained in the bag 10 to the outside. The vapor escape mechanism 30 allows the inside and the outside of the bag 10 to communicate with each other when the pressure of the vapor exceeds a predetermined value to allow the vapor to escape, and also suppresses the escape of vapor from a place other than the vapor escape mechanism 30. ,It is configured. Hereinafter, the structure of the bag 10 will be described.

The bag 10 is arranged between the first film 11, the second film 12 facing the first film 11, and the first film 11 and the second film 12 in a state of being folded back along the folding portion 13c. And an intermediate film 13, FIG. 1 shows the bag 10 when viewed from the side of the first film 11.

Note that the terms “first film”, “second film”, and “intermediate film” described above are merely partitions of the film forming the bag 10 according to the positional relationship of the outer surface of the bag 10, The method of providing the film in manufacturing 10 is not limited by the above terms. For example, the bag 10 may be manufactured using a single film in which the first film 11, the second film 12, and the intermediate film 13 are continuously provided, and the first film 11 and the intermediate film 13 are continuously provided. It may be manufactured using a total of two films, one film and one second film 12, one first film, one second film, and one intermediate film 13, a total of three films. It may be manufactured using a sheet of film.

In the bag 10 according to the present embodiment, with the bag 10 supported or placed so that the second film 12 is located below the first film 11, the contents contained in the bag 10 are microwave ovens. It is mainly assumed to be used by being heated by the above. However, the usage form of the bag 10, for example, the specific posture of the bag 10 when heating the contents is not particularly limited. Examples of the contents include cooked or semi-cooked liquid, viscous or contents in which liquid and solid are mixed, for example, cooked food such as curry, stew, and soup. In addition to foods, foods that can be heated by a microwave oven or the like may be contained in the bag 10 as contents.

As shown in FIG. 1, the outer edge of the bag 10 includes a first upper edge 21 and a second upper edge 22, a lower edge 23 facing the first upper edge 21 and the second upper edge 22, and a first edge facing each other. The side edge 24 and the second side edge 25 are included. The first side edge 24 and the second side edge 25 extend from the first upper edge 21 and the second upper edge 22 toward the lower edge 23. The length of the second upper edge 21 is smaller than the length of the first side edge 24. As shown in FIG. 2, the first upper edge 21 is an outer edge formed by the first film 11 and the intermediate film 13. The second upper edge 22 is an outer edge formed by the second film 12 and the intermediate film 13. In addition, in FIG. 1 and FIG. 2, an example in which the wing portion 17 configured by the first film 11 and the intermediate film 13 is folded back toward the second upper edge 22 so that the outer surfaces 13y of the intermediate film 13 contact each other is shown. Although shown, the wing portion 17 may be folded back toward the lower edge 23 or may be bent upward, not limited to this. However, the inscribed straight line L2 and the protruding seal portion 33, which will be described later, are defined in the bag 10 in a state of being folded back toward the second upper edge 22 so that the outer surfaces 13y of the intermediate film 13 are in contact with each other.

The intermediate film 13 is inserted between the first film 11 and the second film 12 in a state of being folded back so that the first upper edge 21 is one end and the second upper edge 22 is the other end. In the present embodiment, the first upper edge 21 is located closer to the lower edge 23 than the second upper edge 22. The positional relationship between the first upper edge 21 and the second upper edge 22 is not particularly limited. For example, although not shown, the position of the first upper edge 21 and the position of the second upper edge 22 in the front view may match.

In the present embodiment, the first upper edge 21, the second upper edge 22 and the lower edge 23 are parallel to each other, and the first side edge 24 and the second side edge 25 are parallel to each other. Further, the first upper edge 21, the second upper edge 22 and the lower edge 23 and the first side edge 24 and the second side edge 25 are orthogonal to each other. However, the specific configuration of the outer edge of the bag 10 is not particularly limited as long as the bag 10 includes at least one linear outer edge on which the vapor escape mechanism 30 described later is formed.

(Sealed part and non-sealed part)
Next, the sealed portion and the non-sealed portion will be described. The bag 10 includes a seal portion in which the inner surfaces of the film are joined together and a non-seal portion in which the inner surfaces of the film are not joined together. In FIG. 1, the seal portion is hatched.

The seal part has an outer edge seal part 20 a extending along the outer edge of the bag 10 and a protruding seal part 33 that constitutes the vapor escape mechanism 30. The non-sealing portion is a first non-sealing portion 20b that defines the housing portion 15 in which the contents are stored, and a second non-sealing portion through which the steam generated when the steam generated in the housing portion 15 escapes to the outside of the bag 10 passes. 20c and. The protruding seal portion 33 will be described in detail later.

The seal portion is formed by joining any two inner surfaces of the inner surface of the first film 11, the inner surface of the second film 12, and the inner surface of the intermediate film 13. For example, as shown in FIG. 2, the seal portion is formed by joining the inner surface 11x of the first film 11 and the inner surface 13x of the intermediate film 13 along the first upper edge 21 and the first upper edge described later. It includes a seal portion 21a and a second upper edge seal portion 22a, which will be described later, formed by joining the inner surface 12x of the second film 12 and the inner surface 13x of the intermediate film 13 along the second upper edge 22.

The method for forming the seal portion is not particularly limited as long as the housing portion 15 can be sealed from the outside. For example, the seal portion may be formed by melting the layers forming the inner surfaces of the films 11, 12, and 13 by heating and welding the inner surfaces of the films 11, 12, and 13 to each other. Alternatively, the seal portion may be formed by adhering the inner surfaces of the films 11, 12, 13 to each other with an adhesive or the like.

As shown in FIG. 1, the outer edge seal portion 20a includes a first upper edge seal portion 21a formed along the first upper edge 21 and a second upper edge seal portion 22a formed along the second upper edge 22. , A first side edge seal portion 24a formed along the first side edge 24, and a second side edge seal portion 25a formed along the second side edge 25. Further, as will be described later, after filling the contents in the containing portion 15 with the lower edge 23 as a filling port, a lower edge seal portion is formed along the lower edge 23 to seal the containing portion 15. In FIG. 1, the inner edge of the portion which will be the lower edge seal portion later is shown by a dashed line. In the following description, the portion that will later become the lower edge seal portion is also referred to as the lower edge seal scheduled portion 23b.

(Vapor escape mechanism)
Hereinafter, the structure of the vapor escape mechanism 30 will be described with reference to FIGS. 3 and 4. FIG. 3 is an enlarged view of the vapor escape mechanism 30 shown in FIG. FIG. 4 is a sectional view showing a case where the vapor escape mechanism 30 shown in FIG. 3 is viewed along the line IV-IV.

The vapor escape mechanism 30 is configured by giving a part of the seal portion a shape that is easily broken as the pressure of the containing portion 15 increases. Specifically, the vapor escape mechanism 30 has the above-mentioned protruding seal portion 33 and the second non-seal portion 20c. The first non-sealing portion 20b contacts the outer edge of the protruding sealing portion 33 and communicates with the outside of the bag 10. When the pressure of the containing portion 15 increases, a part of the protruding seal portion 33 is destroyed, and the vapor of the containing portion 15 escapes to the outside through the destroyed portion of the protruding seal portion 33 and the second non-sealing portion 20c.

[Protruding seal part]
Hereinafter, the configuration of the protruding seal portion 33 will be described. The protruding seal portion 33 is configured to be connected to the outer edge seal portion 20a of the seal portion that extends along the outer edge of the bag 10 and to protrude toward the first non-seal portion 20b that defines the housing portion 15. It is the part that was done. In the present embodiment, the protruding seal portion 33 is connected to the first upper edge seal portion 21a extending along the first upper edge 21.

As shown in FIG. 3, the protruding seal portion 33 includes at least a pair of first portions 33a, a pair of second portions 33b, and a tip point 33c. In the present embodiment, the protruding seal portion 30 has a substantially pentagonal contour. The tip point 33c is one outer edge (here, the first upper edge) of the bag 10 along the outer edge seal portion 20a (here, the first upper edge seal portion 21a) to which the protruding seal portion 33 is connected. This is the farthest point from the edge 21). The pair of second portions 33b are a portion of the protruding seal portion 33 that is connected at the tip point 33c. In FIG. 3, an angle formed by the pair of second portions 33b at the tip point 33c is indicated by a reference sign θ. The angle θ formed by the pair of second portions 33b at the tip portion 33c is an angle formed by the linear portions of the inner edges of the pair of second portions 33b at the tip portion 33c. When the inner edges of the pair of second portions 33b do not include a linear portion, the angle θ is equal to the straight line connecting the first inner contact point P2 and the tip point 33c, and the second inner contact point P2 and the tip point. It may be defined as an angle formed by a straight line connecting 33c.

In the present embodiment, the pair of second portions 33b is configured such that θ is 90° or more and less than 180°, preferably 150° or less. As will be described later, the pair of second portions 33b may be configured so that θ is less than 90°.

Hereinafter, the pair of first portions 33a will be described. 1 and 3, reference numeral L1 extends in the orthogonal direction D1 orthogonal to one outer edge (here, the first upper edge 21) of the bag 10 in which the protruding seal portion 33 is formed, and also has a tip point 33c. It represents a straight line (hereinafter referred to as a center line) that passes through. Further, in FIG. 1, reference numeral P1 represents a point located on the center line L1 and located in the middle of the accommodation portion 15 in the orthogonal direction D1 (hereinafter referred to as an intermediate point). Further, in FIG. 1, reference numeral L2 represents two straight lines (hereinafter, referred to as inscribed straight lines) that pass through the above-described intermediate point P1 and contact the inner edge of the protruding seal portion 33 at the inner contact P2.
The protruding seal portion 33 protrudes toward the side of the accommodation portion 15 where the intermediate point P1 exists. The pair of first portions 33a are located closer to the one outer edge (the first upper edge 21 here) than the inner contact P2 of the protruding seal portion 33, and are between the two inscribed straight lines L2. Is a pair of parts located at.

The inner edge of the protruding seal portion 33 is an edge portion of the protruding seal portion 33 that is in contact with the first non-sealing portion 20b. Further, the outer edge of the protruding seal portion 33 is an edge portion located on the opposite side of the inner edge. The outer edge of the protruding seal portion 33 is in contact with the second non-seal portion 20c.

The pair of second portions 33b are located closer to the intermediate point P1 of the accommodation portion 15 than the above-described inner contact P2. In addition, the pair of second portions 33b are located between the two inscribed straight lines L2.

The “intermediate point P1” is a point on the center line L1 and, as shown in FIG. 1, the outer edge seal portion 20a (here, the second upper portion) that defines one end of the housing portion 15 in the orthogonal direction D1. The distance S1 from the inner edge of the edge seal portion 22a) to the intermediate point P1 and the inner edge of the outer edge seal portion 20a (here, the lower edge seal portion 23a) that faces the above-mentioned one end of the accommodation portion 15 and defines the other end of the accommodation portion 15. From the intermediate point P1 to the intermediate point P1 are equal to each other. In the bag 10 before being sealed, the inner edge of the outer edge sealing portion (here, the lower edge sealing portion 23b) may be used as the inner edge of the outer edge sealing portion 20a that defines the intermediate point P1.

In the present embodiment, the inner edges of the pair of first portions 33a and the inner edges of the pair of second portions 33b both extend at least partially linearly. Further, the inner edges of the pair of first portions 33 a extend parallel to the orthogonal direction D<b>1 which is orthogonal to the first upper edge 21. Although not shown, the pair of first portions 33a may be configured to intersect with each other when the pair of first portions 33a are virtually extended to the intermediate point P1 side. In this case, the angle formed by the pair of first portions 33a is smaller than the angle θ formed by the pair of second portions 33b. The angle formed by the pair of first portions 33a is the angle formed by the linear portions of the inner edges of the pair of first portions 33a.

In the protruding seal portion 33, the portion where the first portion 33a and the second portion 33b are connected (here, the portion of the inner contact P2), and the portion where the pair of second portions 33b are connected, that is, the tip point 33c may have a curved shape.

Further, the protruding seal part 33 includes other parts between the first part 33a and the second part 33b and between the first part 33a and the outer edge seal part 20a (here, the first upper edge seal part 21a). You can leave. For example, when the pair of first portions 33a is limitedly interpreted as a pair of linear portions between the intermediate point P1 and the outer edge seal portion 20a of the protruding seal portion 33, the intermediate point P1 and the outer edge seal are limited. Other linear portions or curved portions may exist between the portion 20a and the portion 20a. Similarly, when the pair of second portions 33b is limitedly interpreted as a pair of linear portions of the protruding seal portion 33 connected to the tip point 33c, the intermediate point P1 and the second portion 33b are Other linear portions or curved portions may be present between them.

In the present embodiment, the above-mentioned intermediate point P1 is located in the middle of the accommodation portion 15 in the orthogonal direction D1 orthogonal to the first upper edge 21 on which the protruding seal portion 33 is formed, and the first upper edge 21 extends. It is also located in the middle of the accommodating portion 15 in the direction. That is, the distance S3 from the inner edge of the outer edge seal portion 20a (here, the first side edge seal portion 24a) that defines one end of the accommodating portion 15 in the direction in which the first upper edge 21 extends to the intermediate point P1, and the above described accommodating portion 15 of the accommodating portion 15. Is equal to the distance S4 from the inner edge of the outer edge seal portion 20a (here, the second side edge seal portion 25a) that defines the other end of the accommodating portion 15 and that faces one end of the intermediate point P1. In other words, the protruding seal portion 33 of the vapor escape mechanism 30 is provided such that the tip point 33c is located in the middle of the housing portion 15 in the direction in which the first upper edge 21 extends. However, the present invention is not limited to this, and the intermediate point P1 may be located closer to the first side edge 24 or may be located closer to the second side edge 25. In other words, the protruding seal portion 33 may be provided such that the tip point 33c is located at a position displaced from the middle of the housing portion 15 in the direction in which the first upper edge 21 extends.

In the present embodiment, both the pair of first portions 33a and the pair of second portions 33b are line-symmetric with respect to the center line L1. Although not shown, as long as the pair of first portions 33a and the pair of second portions 33b are both located between the two inscribed straight lines L2, the pair of first portions 33a and the pair of second portions 33a. 33b does not need to be line symmetrical with respect to the center line L1.
Further, the pair of first portions 33a may be line-symmetric, but the pair of second portions 33b may not be line-symmetric. Further, the pair of second portions 33b may be line-symmetrical, but the pair of first portions 33a may not be line-symmetrical.

In FIG. 3, reference numeral H1 denotes a distance between the inner contact P2 and the outer edge seal portion 20a (here, the first upper edge seal portion 21a) to which the protruding seal portion 33 is connected in the above-described orthogonal direction D1 ( Hereinafter, it is also referred to as a first distance). The symbol H2 represents the distance (hereinafter, also referred to as the second distance) between the tip point 33c and the inner contact P2 in the orthogonal direction D1. The first distance H1 is preferably 3 mm or more. The second distance H2 is preferably 3 mm or more. A value (=H1/H2) obtained by dividing the first distance H1 by the second distance H2 is preferably 0.3 or more and 3.0 or less.

When the positions of the pair of inner contacts P2 in the orthogonal direction D1 are different, the first distance H1 is the distance between the pair of inner contacts P2 and the outer edge seal portion 20a in the orthogonal direction D1. It may be a value obtained by calculating and averaging them. The same applies to the first distance H2.

[Second non-sealing part]
Next, the second non-sealing portion 20c will be described. The second non-sealing portion 20c communicates with the outside of the bag 10. For example, in the present embodiment, as shown in FIG. 4, the through hole 31 penetrating the first film 11 is formed in the second non-sealing portion 20c. Therefore, even when the first upper edge seal portion 21a extending along the first upper edge 21 extends from the one end 33x of the protruding seal portion 33 to the other end 33y, the broken portion of the protruding seal portion 33 is The vapor passing through and reaching the second non-sealing portion 20c can escape to the outside of the bag 10. In the present specification, “destruction of the seal portion” means that the film peels off at the portion that was the seal portion.

As shown in FIG. 4, not only in the first film 11 but also in the intermediate film 13, a through hole 31 penetrating the intermediate film 13 may be formed in the second non-sealing portion 20c. Although not shown, the through hole 31 may be formed in only one of the first film 11 and the intermediate film 13.

In the second non-sealing portion 20c, preferably, a portion of the second non-sealing portion 20c that is farthest from the first upper edge 21 (hereinafter, also referred to as a leading end point of the second non-sealing portion 20c) has the above-mentioned center. It is formed so as to be located on the line L1. In the present embodiment, the second non-sealing portion 20c has a substantially pentagonal contour. The tip of the second non-sealing portion 20c is located at one apex of the substantially pentagon.

(the film)
Next, an example of the layer structure of the first film 11, the second film 12, and the intermediate film 13 will be described with reference to FIG.

As shown in FIG. 5, the first film 11, the second film 12, and the intermediate film 13 include a base material layer 52 and a thermoplastic resin layer 51. In the example shown in FIG. 5, the base material layer 52 constitutes the outer surfaces 11y, 12y, 13y of the films 11, 12, 13 and the thermoplastic resin layer 51 serves as the inner surface of the films 11, 12, 13. 11x, 12x, and 13x are configured. The base material layer 52 may be printed and displayed with characters, numbers, symbols, figures, patterns for indicating product information.

As a material forming the base material layer 52, for example, polyethylene terephthalate or nylon can be used. The base material layer 52 can ensure high printability on the outer surfaces 11y, 12y, 13y. Further, the base material layer 52 has high heat resistance during heat welding.
As a material forming the thermoplastic resin layer 51, for example, polyethylene or polypropylene can be used.
The thickness of the films 11, 12, and 13 is, for example, in the range of 20 to 250 μm.

Although not shown, the films 11, 12, and 13 may further include an intermediate layer arranged between the base material layer 52 and the thermoplastic resin layer 51. As the intermediate layer, an appropriate layer can be selected according to the required performance such as gas barrier properties of water vapor and other materials, light shielding properties, various mechanical strengths, and the like. For example, a vapor deposition layer of a metal oxide such as aluminum oxide or an inorganic oxide such as silicon oxide may be provided as the intermediate layer. In addition, a resin layer having a gas barrier property, such as ethylene-vinyl alcohol copolymer (EVOH), polyvinylidene chloride resin (PVDC), or aromatic polyamide such as nylon MXD6, may be provided as the intermediate layer. By providing such an intermediate layer, it is possible to prevent oxygen and water vapor from entering the inside of the bag 10. A stretched nylon film may be provided as the intermediate layer. In this case, the puncture resistance of the bag 10 can be improved.

Needless to say, the layer configurations of the first film 11, the second film 12, and the intermediate film 13 are not limited to those described above.

Although not shown, the films 11, 12, and 13 may be provided with an easy-opening means for breaking the bag 10 to facilitate opening the bag 10. For example, the outer edge seal portion 20a along the outer edge of the bag 10, such as the first side edge seal portion 24a and the second side edge seal portion 25a, may have a notch serving as a starting point of breakage. In addition, a half-cut line formed by laser processing, a cutter, or the like may be provided as an easy-opening means in a portion that serves as a path when the bag 10 is broken. Alternatively, the stretched film may be included in the films 11, 12, and 13 so that the stretched direction of the stretched film and the breaking direction of the bag 10 coincide with each other. Usually, the stretching direction of the film coincides with the transport direction T of the film in the method for manufacturing the bag 10 described later. Further, the bag 10 may be printed so as to indicate to the user of the bag 10 the position to be opened.
Further, instead of the notch, notches and scratches may be formed on the outer edge seal portion 20 a along the outer edge of the bag 10. The scratch group may include, for example, a plurality of through holes formed so as to penetrate the films 11, 12, and 13. Alternatively, the scratch group may include a plurality of holes formed in the films 11, 12, and 13 so as not to penetrate the films 11, 12, and 13.

(Bag manufacturing method)
Next, a method of manufacturing the bag 10 according to the present embodiment will be described.

[Fabric film manufacturing process]
First, an example of a process of producing a raw material of a laminated film which is a source of the films 11, 12, and 13 will be described. First, an original fabric of one base material layer 52 is prepared. Here, the original fabric means a rolled-up film. Next, while continuously transporting the long base material layer 52 unwound from one original fabric, print indication may be provided on one surface of the film of the base material layer 52. For example, the print indication for the first film 11 is repeatedly applied to one side portion side of the film of the elongated base material layer 52, and the other side portion side of the film of the elongated base material layer 52 is also provided. Alternatively, the print indication for the second film 12 may be repeatedly provided. Next, the thermoplastic resin layer 51 is laminated on the film of the long base material layer 52 using a dry laminating method or a melt extrusion laminating method to produce a long laminated film. In this way, a laminate film stock for each film 11, 12, 13 is obtained. The printed display may be provided on the laminated film instead of the film of the base material layer.

[Film preparation process]
Next, as shown in FIG. 6A, the original film of the laminated film is appropriately cut, and the first film 11, the second film 12, and the first film 11 in a state of being folded back along the folding portion 13c. An intermediate film 13 arranged between the second film 12 and the second film 12 is prepared. When the vapor escape mechanism 30 includes the through hole 31 as described above, the through hole 31 may be formed in the first film 11 at this stage.

Then, a part of the inner surface 11x of the first film 11 and a part of the inner surface 12x of the second film 12 face each other, the inner surface 13x of the intermediate film 13 faces the inner surface 11x of the first film 11, and the intermediate film 13 The films 11, 12, 13 are superposed so that the inner surface 13x of the second film 12 and the inner surface 12x of the second film 12 face each other.

Although FIG. 6A shows a state in which the films 11, 12, and 13 are separated from each other, the present invention is not limited to this. Although not shown, by appropriately bending one film, between the first film 11 and the second film 12, and between the first film 11 and the second film 12 in a state of being folded back along the folding portion 13c. It is also possible to prepare the intermediate film 13 to be arranged in.

Although not shown, the films 11, 12, and 13 may be laminated on each other in the form of a long film in which a large number of bags 10 are allocated. In this case, after the films 11, 12, and 13 are bonded to each other to form the outer edge seal portion 20a, the long films 11, 12, and 13 are cut along the shape of the bag 10 to form the bag 10 Is obtained.

[Heat welding process]
After that, the first film 11 and the second film 12 are heated from the outer surfaces 11y and 12y along the outer edges to heat part of the inner surface 11x of the first film 11 and part of the inner surface 12x of the second film 12. The inner surface 13x of the intermediate film 13 and the inner surface 11x of the first film 11 are heat-welded, and the inner surface 13x of the intermediate film 13 and the inner surface 12x of the second film 12 are heat-welded. As a result, as shown in FIG. 6B, seal portions such as the outer edge seal portion 20a and the protruding seal portion 33 are formed. As a result, the non-sealing portions 20b and 20c surrounded by the sealing portion are defined. In the heat welding step, as shown in FIG. 6B, the vapor escape mechanism 30 is provided on one outer edge of the first film 11 or one outer edge of the second film 12 (here, the first upper edge 21 of the first film 11). To be implemented. Further, the heat welding process is performed so that the seal portion is not formed on the lower edges 23 of the films 11 and 12 at this stage.

[Cutting process]
Next, as shown in FIG. 6C, each of the films 11, 12, and 13 joined to each other by the seal portion is cut along the contour of the bag 10. In this way, the bag 10 including the vapor escape mechanism 30 formed on the first upper edge 21 is manufactured. At this time, the first upper edge 21 may be formed by cutting the first film 11 and the intermediate film 13.

[Filling process]
Next, the bag 10 is filled with the content through the planned lower edge sealing portion 23b (filling port) of the lower edge 23. After that, the inner surface 11x of the first film 11 and the inner surface 12x of the second film 12 are heat-welded along the lower edge 23 to form the lower edge seal portion 23a. In this way, as shown in FIG. 6D, the bag 10 in which the contents are sealed in the container 15 can be obtained.

(How to heat the contents)
Next, an example of a method for heating the contents stored in the storage portion 15 of the bag 10 will be described.

First, the bag 10 with the second film 12 positioned below the first film 11 is placed inside the microwave oven. Next, the contents are heated using a microwave oven. As a result, the temperature of the contents rises, and along with this, the moisture contained in the contents evaporates and the pressure in the containing portion 15 increases. In FIG. 7A, when the pressure of the housing portion 15 is increased, the inflatable portion 40 in which the first film 11 forming the housing portion 15 swells above the first film 11 forming the outer edge sealing portion 20 a is stored in the housing portion 15. It is shown that it is formed in. In addition, when the pressure of the housing portion 15 increases, the second film 12 forming the housing portion 15 swells below the second film 12 forming the outer edge seal portion 20a.

Although FIG. 7A shows an example in which the wing portion 17 constituted by the first film 11 and the intermediate film 13 is folded back toward the second upper edge 22 when the contents are heated. The state of the bag 10 during use is not limited to this. For example, the state of the bag 10 when heating the contents may be a state in which the wing portion 17 is folded back toward the lower edge 23, or a state in which the wing portion 17 is folded upward. It may be.

When the pressure of the housing portion 15 further increases due to heating, the expansion portion 40 further expands and reaches the inner edge of the second portion 33b of the protruding seal portion 33 as shown in FIG. 7B. As a result, as shown in FIG. 7B, a force F that acts to peel the first film 11 from the intermediate film 13 and destroy the protruding seal portion 33 acts on the second portion 33b of the protruding seal portion 33. FIG. 7C is a diagram showing a state in which the inflating section 40 is further expanded and reaches the inner edge of the first portion 33 a of the protruding seal section 33.

Here, according to the present embodiment, as described above, the protruding seal portion 33 is configured such that the angle θ formed by the pair of second portions 33b at the tip point 33c is less than 180°.
Therefore, the force generated due to the expansion section 40 can be first applied to the tip point 33c in a concentrated manner. Therefore, it is possible to easily peel off the first film 11 from the intermediate film 13 at the tip point 33c to destroy the protruding seal portion 33. That is, the starting point of the peeling of the film can be easily created at the tip point 33c.

In addition, in the present embodiment, the pair of second portions 33b of the protruding seal portion 33 are located closer to the intermediate point P1 of the accommodation portion 15 than the inner contact P2. Therefore, the force of peeling the first film 11 from the intermediate film 13 acts on the entire area of the pair of second portions 33b. On the other hand, when the pair of first portions 33a of the protruding seal portion 33 draws two inscribed straight lines L2 that are in contact with the inner edge of the protruding seal portion 33 at the inner contact point P2 from the above-described intermediate point P1 of the housing portion 15, It is located closer to the first upper edge 21 side than the inner contact P2. In this case, the force generated by the inflating portion 40 expanding to the outer edge of the bag 10 acts more strongly on the second portion 33b than on the first portion 33a, as shown in FIG. 7C. Therefore, the force acting on the protruding seal portion 33 during the time from when the expanding expanding portion 40 reaches the tip point 33c of the protruding seal portion 33 to when it reaches the inner edge of the first upper edge seal portion 21a is It can be concentrated on the portion 33b. Therefore, as shown in FIG. 7D, the breakage of the protruding seal portion 33 can be easily advanced at the second portion 33b.

When the broken portion of the protruding seal portion 33 reaches the second non-sealing portion 20c, the vapor of the housing portion 15 passes through the broken portion of the protruding seal portion 33, the second non-sealing portion 20c and the through hole 31. Exit to the outside. As a result, the pressure inside the accommodating portion 15 can be reduced to prevent the bag 10 from bursting.

Further, as described above, the force acting on the first portion 33a due to the expansion portion 40 is weaker than the force acting on the second portion 33b. Therefore, according to the present embodiment, it is possible to prevent the breakage of the protruding seal portion 33 from proceeding in the first portion 33a. Thereby, it is possible to prevent the breakage of the protruding seal portion 33 reaching the outer edge of the bag 10 and the contents from leaking out from the outer edge of the bag 10. Further, according to the present embodiment, since the force acting on the protruding seal portion 33 can be concentrated on the second portion 33b to destroy the second portion 33b, the first side edge seal portion 24a and the second side edge portion 24b can be destroyed. It is possible to prevent the outer edge seal portion 20a such as the edge seal portion 25a from being destroyed before the protruding seal portion 33. Therefore, it is possible to prevent the contents from leaking from the outer edge of the bag 10.

In addition, according to the present embodiment, since the protruding seal portion 33 includes the pair of first portions 33a, the protruding seal portion 33 has a smaller amount of the protruding seal portion 33 than when the protruding seal portion 33 does not include the pair of first portions 33a. The distance from the tip point 33c to the intermediate point P1 of the accommodating portion 15 can be shortened. As a result, the force acting on the tip point 33c due to the expansion section 40 can be increased. Therefore, the first film 11 can be more easily peeled off from the intermediate film 13 at the tip point 33c to break the protruding seal portion 33.

Various changes can be made to the above-described embodiment. Hereinafter, modified examples will be described with reference to the drawings as necessary. In the following description and the drawings used in the following description, for the portions that may be configured in the same manner as the above-described embodiment, the same reference numerals as those used for the corresponding portions in the above-described embodiment are used. A duplicate description is omitted. Further, when it is clear that the effects obtained in the above-described embodiment can be obtained in the modified example as well, the description thereof may be omitted.

(Variation of vapor escape mechanism)
Hereinafter, some modifications of the shape of the vapor escape mechanism 30 will be described. 8 to 12 are views showing modified examples of the vapor escape mechanism 30.

[First Modification]
In the above-described present embodiment, an example in which the pair of second portions 33b of the protruding seal portion 33 extends linearly has been shown. However, the present invention is not limited to this, and the pair of second portions 33b may include curved portions. In this case, preferably, as shown in FIG. 8, the pair of second portions 33b has a convex shape that is convex from the inner edge side toward the outer edge side. As a result, as shown in FIG. 8, the angle θ formed by the pair of second portions 33b at the tip point 33c can be made smaller, for example, less than 90°. By configuring the second portion 33b in this way, the force caused by the inflating portion 40 can be concentrated more at the tip point 33c.

[Second Modification]
As shown in FIG. 9, even when the pair of second portions 33b extends linearly, the angle θ formed by the pair of second portions 33b at the tip point 33c can be less than 90°. is there.

[Third Modification]
Further, in the above-described present embodiment, an example is shown in which the contour of the protruding seal portion 33 second non-seal portion 20c is a substantially pentagon. However, the outline of the second non-sealing portion 20c is not particularly limited as long as the steam can be appropriately discharged to the outside of the bag 10 in the second non-sealing portion 20c. For example, as shown in FIG. 10, the contour of the second non-sealing portion 20c may be circular.

[Fourth Modification]
Further, in the above-described present embodiment, the example in which the circular through hole 31 is formed in the second non-sealing portion 20c of the vapor escape mechanism 30 has been shown. However, the shape of the through hole 31 is not particularly limited as long as the second non-sealing portion 20c can be communicated with the outside of the bag 10 to remove steam. For example, as shown in FIG. 11, a slit-shaped through hole 31 may be formed in the second non-sealing portion 20c. The slit-shaped through hole 31 is formed, for example, by making a cut in the first film 11 or the intermediate film 13.

[Fifth Modification]
Further, in the above-described present embodiment, the first upper edge seal portion 21a includes a portion extending from the one end 33x of the protruding seal portion 33 to the other end 33y, and the protruding seal portion 33 and the first upper edge seal portion. An example in which the through hole 31 is formed in the second non-sealing portion 20c surrounded by 21a has been shown. However, the structure of the vapor escape mechanism 30 in the portion outside the outer edge of the protruding seal portion 33 is not particularly limited as long as the vapor in the housing portion 15 can be released to the outside of the bag 10. For example, as shown in FIG. 12, the second non-seal portion 20c that contacts the outer edge of the protruding seal portion 33 may be formed to contact the first upper edge 21. That is, the first upper edge seal portion 21a may not include the portion extending from the one end 33x of the protruding seal portion 33 to the other end 33y. In this case, even if the through hole is not formed in the second non-sealing portion 20c, the vapor that has reached the second non-sealing portion 20c through the broken portion of the protruding seal portion 33 will be discharged from the first upper edge 21. It can be pulled out of the bag 10.

(Modification of bag)
Hereinafter, some modified examples of the structure of the bag 10 will be described. 13 and 14 are views showing modified examples of the bag 10.

(First modification)
In the above-described present embodiment, the bag 10 includes the intermediate film 13 arranged between the first film 11 and the second film 12 in the folded state, and the protruding seal portion 33 includes the first film 11. In addition, an example in which the intermediate film 13 is connected to the outer edge seal portion 20a formed by being joined is shown. However, the structure of the bag 10 is not particularly limited as long as the vapor escape mechanism 30 including the protruding seal portion 33 connected to the outer edge seal portion 20a can be formed. For example, as shown in FIG. 13, the bag 10 may be a so-called flat pouch that includes the first film 11 and the second film 12 but does not include the intermediate film 13. In this case, the protruding seal portion 33 is connected to the outer edge seal portion 20a formed by joining the first film 11 and the second film 12.

Although not shown, when the bag 10 includes the intermediate film 13 disposed between the first film 11 and the second film 12 in the folded state, the protruding seal portion 33 has the first film 11 It may be connected to the outer edge seal portion 20a (for example, the first upper edge seal portion 21a) formed by joining the second film 12 and the second film 12. For example, in the so-called bottom gusset type bag 10, the protruding seal portion 33 connected to the upper edge seal portion of the bag 10 may be formed.

(Second modification)
Further, in the above-described present embodiment, an example is shown in which the protruding seal portion 33 connected to the first upper edge seal portion 21a of the bag 10 is formed, but the position where the protruding seal portion 33 is provided is particularly limited. There is no. For example, as shown in FIG. 14, a protruding seal portion 33 connected to the first side edge seal portion 24a of the bag 10 may be formed.

Although some modified examples of the above-described embodiment have been described, it goes without saying that a plurality of modified examples can be appropriately combined and applied.

(One Embodiment of the Present Invention)
Hereinafter, an embodiment of the present invention will be described.

A pouch according to an embodiment of the present invention is a bag that contains a film and stores contents, and a seal part in which the opposing films are bonded together and a non-seal in which the opposing films are not bonded together. And a first non-sealing portion defining a storage portion in which the contents are stored, the sealing portion extending along an outer edge of the bag. And a projecting seal part connected to the outer edge seal part, wherein an outer edge of the projecting seal part communicates with the outside of the bag, and the projecting seal part is connected to the projecting seal part. A point that is most distant from one outer edge of the bag along the outer edge seal portion that is formed is referred to as a tip point, and extends in a direction orthogonal to the one outer edge of the bag and passes through the tip point. Referred to as the center line, when the point located on the center line and located in the middle of the accommodating portion in the orthogonal direction is referred to as the intermediate point, the protruding seal portion projects toward the intermediate point, The projecting seal portion is located closer to the one outer edge side than the inner contact when two inscribed straight lines passing through the intermediate point and contacting the inner edge of the projecting seal portion at inner contact points are drawn, and A pair of first portions located between the inscribed straight lines, and a pair located between the two inner inscribed straight lines and closer to the intermediate point than the inner contact, and connected at the tip point. And a second portion of, and the angle formed by the pair of second portions at the tip point is less than 180°.

Preferably, a distance between the outer edge seal part to which the protruding seal part is connected and the inner contact in the orthogonal direction is 3 mm or more. Further, preferably, a distance between the tip point and the inner contact in the orthogonal direction is 3 mm or more.

Preferably, a distance between the outer edge seal part to which the protruding seal part is connected and the inner contact in the orthogonal direction is referred to as a first distance, and the tip point and the inner contact in the orthogonal direction. When the distance between and is referred to as a second distance, a value obtained by dividing the first distance by the second distance is 0.3 or more and 3.0 or less.

In the bag of the present invention, each of the pair of first portions and the pair of second portions may be line-symmetric with respect to the center line.

In the bag of the present invention, the pair of second portions may have a convex shape that is convex from the inner edge side toward the outer edge side.

In the bag of the present invention, the film includes a first film and a second film, and an intermediate film arranged between the first film and the second film in a folded state, and the protrusion seal. The part may be connected to the outer edge seal part formed by combining the first film and the intermediate film in the outer edge seal part.

According to the present invention, the projecting seal part projecting toward the non-sealing part defining the accommodating part has two inscribed straight lines which are in contact with the inner edge of the projecting seal part from the midpoint of the accommodating part at the inner contact. In some cases, it includes a pair of first portions located on the outer edge side of the bag with respect to the inner contact and located between two inscribed straight lines. In this case, the force generated by the increased pressure in the housing portion is unlikely to act on the pair of first portions. Therefore, it is possible to prevent the films from peeling from each other in the pair of first portions. This can prevent the peeling of the films from reaching the outer edge seal portion connected to the protruding seal portion. Therefore, it is possible to prevent the contents from leaking from the bag.

Next, the present invention will be described more specifically by way of examples, but the present invention is not limited to the description of the examples below as long as the gist thereof is not exceeded.

(Example)
The bag 10 including the vapor escape mechanism 30 having the protruding seal portion 33 including the pair of first portions 33a, the pair of second portions 33b, and the tip point 33c shown in FIG. 1 was prepared. The angle θ formed by the pair of second portions 33b at the tip point 33c was 120°. The first distance H1 and the second distance H2 shown in FIG. 3 are 4 mm and 6 mm, respectively. The above-mentioned distance S1, distance S2, distance S3, and distance S4 calculated with the midpoint P1 as the starting point were 76 mm, 76 mm, 62 mm, and 62 mm, respectively.

Next, the accommodating portion 15 of the bag 10 was filled with 100 g of water and heated in a microwave oven with an output of 600 W. As a result, in all of the samples of 10 bags 10, the film peeled at the tip point 33c of the protruding seal portion 33 and the pair of second portions 33b, and the film peeled at the outer edge seal portion 20a was not seen. Then, the steam appropriately escaped to the outside of the bag 10 through the non-sealing portion 20c, and the water did not leak to the outside of the bag 10. In all of the samples, the peeling of the film at the protruding seal portion 33 did not reach the first upper edge seal portion 21a to which the protruding seal portion 33 is connected.

(Comparative example)
In FIG. 1, a bag having a vapor escape mechanism was prepared in the same manner as in FIG. 1 except that the protruding seal portion 30 was changed to the protruding seal portion 133 shown in FIG. In the protruding seal portion 133 shown in FIG. 15, a pair of linear second portions 33b connected at the tip point 33c extends to the first upper edge seal portion 21a. The angle formed by the pair of second portions 33b at the tip point 33c was 90°.

In the same manner as in the example, 100 g of water was filled in the accommodating portion of the bag having the vapor escape mechanism including the protruding seal portion 133 shown in FIG. 15, and the water was heated in the microwave oven with an output of 600 W.
As a result, in all of the 10 bag samples, the peeling of the film generated in the protruding seal portion 133 progressed to the first side edge seal portion 24a or the second side edge seal portion 25a. For this reason, water leaked out from the first side edge 24 or the second side edge 25.

10 bag 11 1st film 12 2nd film 13 intermediate film 15 accommodation part 17 wing part 20a sealing part 20b first non-sealing part 20c second non-sealing part 21 first upper edge 21a first upper edge sealing part 22 second upper Edge 22a Second upper edge seal portion 23 Lower edge 23a Lower edge seal portion 23b Lower edge seal scheduled portion 24 First side edge 24a First side edge seal portion 25 Second side edge 25a Second side edge seal portion 30 Vapor escape mechanism 31 Through hole 33 Projection seal part 33a First part 33b Second part 33c Tip point 40 Expansion part L1 Center line L2 Inscribed straight line P1 Intermediate point P2 Inner contact point

Claims (7)

A bag containing a film and containing the contents,
A seal portion in which the films facing each other are joined,
A non-sealing portion in which the films facing each other are not bonded,
And a wing section,
The seal portion has an outer edge seal portion extending along an outer edge of the bag, and a protruding seal portion connected to the outer edge seal portion,
The non-sealing portion has a first non-sealing portion that is in contact with an inner edge of the protruding sealing portion and defines a storage portion in which the content is stored.
The outer edge of the bag includes a first upper edge that constitutes an outer edge of the wing portion, a second upper edge, and a lower edge that faces the first upper edge and the second upper edge,
The distance from the first upper edge to the lower edge is shorter than the distance from the second upper edge to the lower edge,
The projecting seal portion is connected to a first upper edge seal portion of the outer edge seal portion, in which the films are joined together along the first upper edge,
Of the projecting seal part, the part farthest from one outer edge of the bag along the outer edge seal part to which the projecting seal part is connected is referred to as a tip point, and with respect to the one outer edge of the bag. When a straight line extending in the orthogonal direction and passing through the tip point is referred to as a center line, and a point located on the center line and located in the middle of the accommodation portion in the orthogonal direction is referred to as an intermediate point, the protruding seal portion Is projected toward the intermediate point,
The projecting seal portion is located closer to the one outer edge side than the inner contact when two inscribed straight lines passing through the intermediate point and contacting the inner edge of the projecting seal portion at inner contact points are drawn. A pair of first portions located between the two inscribed straight lines and the intermediate point side of the inner contact point and between the two inscribed straight lines and connected at the tip point And a pair of second portions,
The pair of first portions and the pair of second portions are configured such that the protruding seal portion has a substantially pentagonal outline. The bag according to claim 1, wherein an angle formed by the pair of second portions at the tip point is 90° or more and less than 180°. The bag according to claim 1 or 2, wherein a distance between the outer edge seal portion to which the protruding seal portion is connected and the inner contact in the orthogonal direction is 3 mm or more. The bag according to any one of claims 1 to 3, wherein a distance between the tip point and the inner contact in the orthogonal direction is 3 mm or more. The distance between the outer edge seal part to which the protruding seal part is connected and the inner contact in the orthogonal direction is referred to as a first distance, and the distance between the tip point and the inner contact in the orthogonal direction. The bag according to any one of claims 1 to 4, wherein the first distance is shorter than the second distance when the distance is referred to as a second distance. The bag according to any one of claims 1 to 5, wherein the pair of first portions and the pair of second portions are line-symmetric with respect to the center line. The film includes a first film and a second film, and an intermediate film disposed between the first film and the second film in a folded state,
7. The bag according to claim 1, wherein one end of the intermediate film is located at the first upper edge and the other end of the intermediate film is located at the second upper edge.

Images