JP7424524B2 - pouch - Google Patents

Description

The present invention relates to a pouch used for heating its contents.

Pouches that are used to heat their contents are known. This pouch is provided with a structure for discharging water vapor generated from the contents by heating to the outside of the pouch. For example, the side seal portion of the pouch described in Patent Document 1 is provided with a recessed portion that is recessed toward the housing space of the pouch. When this pouch is heated by a heating means such as a microwave oven, the seal in the recessed part peels off as the internal pressure of the storage space increases, and an opening is formed in the recessed part, and water vapor passes through the opening and heats the pouch. is discharged to the outside.

International Publication No. 2013/133092

If the pouch is tilted after the pouch is heated, a large amount of the contents may leak out of the pouch through the opening formed in the recess.
An object of the present invention is to provide a pouch in which a situation in which a large amount of contents leaks from an opening formed by peeling of a seal is unlikely to occur.

[1] One form of the pouch according to the present invention includes a pair of overlapping sheets, and the pair of sheets are sealed to each other such that a storage space capable of accommodating the contents is formed between the pair of sheets. a first seal part along the edge of the pair of sheets, and a second seal part having a concave shape toward the accommodation space; and a part of the pair of sheets. and an unsealed part that is an unsealed part surrounded by the second sealed part, and the second sealed part is arranged so that the pressure in the accommodation space increases due to water vapor generated from the contents. a tip portion configured to peel off due to stress concentration when The second seal portion includes a peel-off regulating portion that restricts peeling of the second seal portion that advances toward the first seal portion side.

The contents are put into the storage space of the pouch, and the opening of the pouch is sealed so that the storage space is closed, thereby forming a pouch in a closed state. When the closed pouch is heated, water vapor is generated from the contents, increasing the pressure in the containing space. When the tip of the second seal part peels off as the pressure increases, an opening is formed in the tip. Since the second seal part is provided with the peel-off regulating part, peeling of the seal in the second seal part is regulated by the peel-off regulating part. The water vapor staying in the storage space passes through the opening formed at least at the tip and the passage formed between the pair of sheets in the unsealed part, and is discharged to the outside of the edges of the pair of sheets. .

According to the above-mentioned pouch, since the water vapor is discharged to the outside of the storage space in this way, it is difficult to burst. Further, the size of the opening formed in the second seal part by peeling of the second seal part is regulated by the peel regulation part, and an opening larger than the predetermined size is formed in the second seal part. Hard to get. Therefore, even if the pouch is tilted after the heating of the pouch is finished, a situation in which a large amount of contents leaks from the opening formed in the second seal portion is unlikely to occur. Furthermore, when the heating of the pouch is completed, the surfaces of the sheets constituting the unsealed portion are likely to be in close contact with each other due to water vapor. If the surfaces of each sheet are in close contact with each other, even if the contents pass through the opening formed in the second sealed portion, the movement of the contents will be hindered by the unsealed portion that is in close contact with each other, and the contents will be It is less likely to leak outside than the edge of the seat.

[2] According to the example of the pouch, the peeling regulating portion includes a portion having a seal width wider than the tip portion.
[3] According to the example of the pouch, the sealing width of the peeling regulating portion increases from the tip end toward the first sealing portion.

[4] According to the example of the pouch, the connecting portion includes a first connecting portion connecting one end of the distal end portion and a first end constituting the first seal portion; a second connecting portion connecting the other end of the tip and a second end constituting the first seal portion, one of the first connecting portion and the second connecting portion being A peeling regulating portion is included, and the other of the first connecting portion and the second connecting portion does not include the peeling restricting portion.

[5] According to the example of the pouch, the second seal portion is configured such that the tip portion faces the center of the accommodation space.
[6] According to the example of the pouch, the pouch includes the contents placed in the accommodation space.

According to the pouch, a situation in which a large amount of contents leaks from the opening formed by peeling of the seal is unlikely to occur.

FIG. 2 is a front view of an embodiment of a pouch in an open state. FIG. 2 is a front view of an embodiment of a pouch in a closed state. FIG. 3 is an enlarged view of the vapor seal portion of FIGS. 1 and 2. FIG. FIG. 3 is a front view showing the pouch of FIG. 2 in a state where the tip of the vapor seal portion has been peeled off. FIG. 5 is a diagram showing a state in which the pouch of FIG. 4 is tilted. FIG. 6 is a diagram showing a state in which the upper seal portion of FIG. 5 is cut away.

(Embodiment)
1 and 2 show an example of the structure of the pouch 1. FIG. The form of the pouch 1 is a standing pouch. Possible states of the pouch 1 include at least an open state and a closed state. In addition, in another example, the form of the pouch 1 is a flat pouch. FIG. 1 shows the pouch 1 in an open state, and FIG. 2 shows the pouch 1 in a closed state. The open state of the pouch 1 is a state in which the contents 100 are not put into the pouch 1 and the opening 15 of the pouch 1 is open. The closed state of the pouch 1 is a state in which the contents 100 are put into the pouch 1 and the opening 15 is sealed. The content 100 is, for example, a food product containing sauce. In one example, a closed pouch 1 is provided to an end user.

As shown in FIG. 1, the pouch 1 includes a first sheet 11, a second sheet 12, and a gusset sheet 13. The first sheet 11 and the second sheet 12 are a pair of overlapping sheets. The pouch 1 in the open state is provided with a sealing portion 20 in which the sheets 11 to 13 are sealed together. Note that the dots shown in FIGS. 1 to 6 indicate sealed portions of each sheet 11 to 13.

Each of the sheets 11 to 13 has, for example, the following layer structure.
Each sheet 11-13 includes an outermost layer, a middle layer, and an innermost layer. An example of a material constituting the outermost layer is a transparent material. An example of a transparent material is polyethylene terephthalate. The intermediate layer includes a printed layer, a first adhesive layer, a stretched nylon layer, and a second adhesive layer. The printing layer is provided inside the outermost layer. In one example, a picture, text describing a product, etc. are printed on the outer surface of the printing layer. A first adhesive layer is provided inside the printing layer. An expanded nylon layer is provided inside the first adhesive layer. A second adhesive layer is provided inside the expanded nylon layer. An example of a material constituting each adhesive layer is a dry lamination adhesive. The innermost layer is provided inside the second adhesive layer. An example of the material constituting the innermost layer is unstretched polypropylene.

The seal portion 20 includes a first side seal portion 21 , a second side seal portion 22 , and a gusset seal portion 23 . The first side seal portion 21 is an example of a first seal portion, and is a portion where one side 11A of the first sheet 11 and one side 12A of the second sheet 12 are sealed to each other. be. The second side seal portion 22 is a portion where the other side portion 11B of the first sheet 11 and the other side portion 12B of the second sheet 12 are sealed to each other. The gusset seal portion 23 is a portion where the sheets 11 to 13 are sealed together to form the gusset seal portion 23 of the pouch 1.

By sealing each of the sheets 11 to 13 with the seal portion 20, a storage space 14 capable of storing the contents 100 is formed between the first sheet 11 and the second sheet 12. An opening 15 that opens the storage space 14 is provided at the top of the pouch 1 in the open state. The contents 100 are put into the storage space 14, and the sheets 11 and 12 are sealed so that the opening 15 is closed, thereby forming the pouch 1 in the closed state shown in FIG. 2. The seal portion 20 of the pouch 1 in the closed state further includes an upper seal portion 24 that closes the opening 15 in addition to the seal portions 21 to 23.

A notch 22A is provided at the top of the second side seal portion 22. A perforation line (not shown) is provided at the top of the pouch 1 to connect with the notch 22A. A part of the pouch 1 including the upper seal portion 24 is cut off from the notch 22A along the cut line to open the opening 15, and the pouch 1 in a used state is configured. The end user can remove the contents 100 through the opened opening 15.

The first side seal portion 21 includes an upper seal portion 21A, a lower seal portion 21B, and a vapor seal portion 30. The upper seal portion 21A and the lower seal portion 21B are portions sealed along the edges of each sheet 11, 12. The vapor sealing part 30 is an example of a second sealing part, and is used to discharge water vapor generated from the contents 100 to the outside of the accommodation space 14 when the closed pouch 1 is heated by the heating means. This is the part provided. The vapor seal portion 30 is continuous with the upper seal portion 21A and the lower seal portion 21B, and covers the side portion 11A of the first sheet 11 and the side portion 12A of the second sheet 12 together with these seal portions 21A and 21B. It is sealed.

FIG. 3 is an enlarged view of the vapor seal portion 30. The shape of the vapor sealing portion 30 is a shape that is depressed from the outer edges 11C and 12C of each sheet 11 and 12 toward the accommodation space 14 side. The vapor seal portion 30 includes a tip portion 40 and a connecting portion 50. The tip portion 40 is provided at a location where strong stress concentration occurs in each sheet 11, 12 when the pressure in the accommodation space 14 increases due to water vapor generated from the contents 100 in the closed pouch 1. Therefore, when the internal pressure of the pouch 1 in the closed state increases, at least the distal end portion 40 of the vapor-permeable seal portion 30 peels off, and the opening 31 ( (see FIG. 4) is formed.

The connecting portion 50 includes a first connecting portion 60 that connects one end 41 of the tip portion 40 and the end 25 of the upper seal portion 21A, and a first connecting portion 60 that connects the other end 42 of the tip portion 40 and the end of the lower seal portion 21B. It includes a second connection part 70 that connects the part 26.

The first connecting portion 60 includes a peeling regulating portion 61 that regulates peeling of the vapor sealing portion 30 proceeding from the tip portion 40 side toward the upper sealing portion 21A side, and a peeling regulating portion 61 and the upper sealing portion 21A. It includes a side end portion 62 that connects. The peeling regulating portion 61 is inclined toward the opening portion 15 as it goes from the distal end portion 40 side toward the upper seal portion 21A side. The side end portion 62 connects the end of the peel regulating portion 61 and the upper seal portion 21A, and is inclined from the end of the peel restricting portion 61 toward the upper seal portion 21A side.

The seal width XA of the peeling regulating portion 61 becomes wider from the tip portion 40 side toward the upper seal portion 21A side. Even when the internal pressure of the accommodation space 14 is the highest, the maximum dimension of the seal width XA of the peeling regulating part 61 is set to the side closer to the first side seal part 21 than the peeling regulating part 61 of the vapor passage seal part 30. The dimensions are such that the part will not peel off. The second connecting portion 70 extends in the width direction of the pouch 1. The seal width XB of the second connection portion 70 is constant. Note that the seal width XA is the dimension of a perpendicular line drawn from the outer edge 61A to the inner edge 61B of the peel regulating portion 61, and the seal width XB is the dimension of a perpendicular line drawn from the outer edge 70A to the inner edge 70B of the second connecting portion 70.

The pouch 1 further includes an unsealed portion 80. The unsealed part 80 is a part of each sheet 11, 12, and is a part surrounded by the outer edge 20A of the first side seal part 21, and is a part of the first unsealed part 81 and the second unsealed part 82. including. The surfaces of the sheets 11 and 12 constituting the unsealed portion 80 are not sealed. The first unsealed portion 81 is a portion corresponding to the recess of the vapor sealing portion 30, and is a portion surrounded by the outer edge 30A of the vapor sealing portion 30. The second unsealed portion 82 is a portion including the outer edges 11C, 12C of each sheet 11, 12, and is a portion formed between the end of the upper sealed portion 21A and the end of the lower sealed portion 21B.

An example of how the pouch 1 is used by an end user will be described.
First, the pouch 1 in a closed state is placed in a heating means (not shown) such as a microwave oven, and heated by the heating means. After heating is completed, the pouch 1 is carried by the end user as shown in FIG. Next, as shown in FIG. 6, a portion including the upper seal portion 24 is cut off by the end user along the notch 22A and a cutoff line (not shown), and the opening 15 is opened. Next, the contents 100 are taken out of the pouch 1 through the opening 15.

According to the pouch 1, the following actions and effects can be obtained.
When the closed pouch 1 is heated by the heating means, water vapor is generated from the contents 100, and the pressure in the storage space 14 gradually increases. For this reason, the first sheet 11 and the second sheet 12 expand in the direction of separating from each other, and the tip portion 40 of the vapor-permeable seal portion 30 is peeled off to form the opening 31. After the tip portion 40 is peeled off, the peeling of the vapor seal portion 30 progresses toward the first side seal portion 21 . Since the first connection portion 60 is provided with the peeling regulating portion 61, for example, peeling of the seal in the vapor passage seal portion 30 ends at the widest portion of the seal width XA of the peeling regulating portion 61. Note that when the amount of water vapor generated from the contents 100 is small, peeling of the seal in the vapor seal portion 30 ends at a portion closer to the tip portion 40 than the widest portion of the seal width XA.

The water vapor staying in the storage space 14 passes through at least the opening 31 formed in the tip portion 40 and the passage formed between the pair of sheets 11 and 12 in the unsealed portion 80, and then passes through the passage formed between the pair of sheets 11 and 12 in the unsealed portion 80. It is discharged to the outside of the outer edges 11C and 12C. Therefore, the pouch 1 is less likely to burst.

The size of the opening 31 formed in the vapor sealing part 30 by peeling of the vapor sealing part 30 is regulated by the peeling regulating part 61, and an opening larger than the planned size of the opening 31 is formed in the vapor sealing part 30. Hard to form. Therefore, even if the pouch 1 is tilted after heating of the pouch 1 is completed, a situation in which a large amount of the contents 100 leaks from the opening 31 formed in the vapor sealing portion 30 is unlikely to occur. Further, when the heating of the pouch 1 is completed, the surfaces of the sheets 11 and 12 forming the unsealed portion 80 are in close contact with each other due to water vapor. Therefore, even if the contents 100 pass through the opening 31 formed in the vapor sealing part 30, the movement of the contents 100 is hindered by the unsealed part 80, which is in close contact with the contents 100, and the contents 100 are transferred to each sheet 11, 12. It is less likely to leak to the outside than the outer edges 11C and 12C.

Further, the seal width XA of the peeling regulating portion 61 gradually widens from the tip portion 40 side toward the upper seal portion 21A side. Therefore, in the process of peeling of the peel regulating part 61, local stress concentration is unlikely to occur in the peel regulating part 61, and the peeling progresses stably until the peeling is regulated by the peel regulating part 61.

In addition, since the side end portion 62 is inclined from the end of the peeling regulating portion 61 toward the upper seal portion 21A side, It is also possible to secure a wide area for forming a perforation line or the like above.

(Modified example)
The description of the above embodiments is an example of the form that the pouch according to the present invention can take, and is not intended to limit the form. The pouch according to the present invention may take the form of, for example, the following modifications of the above embodiments, or a combination of at least two mutually consistent modifications.

- The shape of the vapor seal portion 30 can be changed arbitrarily. In the first example, the side end portion 62 is omitted from the first connecting portion 60, and the peeling regulating portion 61 is connected to the upper seal portion 21A. The seal width XA of the peeling regulating portion 61 becomes wider from the tip portion 40 side toward the upper seal portion 21A side. In the second example, a seal portion having a different shape from the peel regulating portion 61 is provided between the tip portion 40 and the peel regulating portion 61. The shape of the seal portion is, for example, a shape in which the seal width is constant, or a shape in which the seal width becomes narrower as it goes from the tip portion 40 toward the peeling regulating portion 61. In the third example, in addition to the first connection part 60, the second connection part 70 is also provided with a peeling regulating part. The peel regulating portion of the second connecting portion 70 has a shape similar to the shape of the peel restricting portion 61 of the first connecting portion 60, for example. In the fourth example, only the second connection portion 70 is provided with a peeling restriction portion.

- The configuration of each sheet 11 to 13 can be changed arbitrarily. In the first example, the first sheet 11 and the second sheet 12 are constructed by folding one sheet. In the second example, each of the sheets 11 to 13 is constructed by folding one sheet.

1: Pouch 11: First sheet 12: Second sheet 14: Accommodation space 20: Seal portion 21: First side seal portion (first seal portion)
25: End (first end)
26: End (second end)
30: Steaming seal part (second seal part)
40: Tip 41: End (one end)
42: End (other end)
50: Connection portion 60: First connection portion 61: Peeling regulation portion 70: Second connection portion 80: Unsealed portion 100: Contents

Claims (5)

A pair of sheets stacked on top of each other,
a first sealing portion along an edge of the pair of sheets, which is a portion that seals the pair of sheets to each other so that a storage space capable of accommodating contents is formed between the pair of sheets; a seal portion including a second seal portion having a concave shape toward the accommodation space;
A pouch comprising an unsealed part that is a part of the pair of sheets and is an unsealed part surrounded by the second sealed part,
The first seal portion includes an upper seal portion and a lower seal portion provided along the edge of the sheet,
The second seal portion includes a tip portion configured to peel off due to stress concentration when the pressure in the accommodation space increases due to water vapor generated from the contents, and a seal portion between the tip portion and the first seal portion. including a connection part that connects the seal part,
The connecting portion includes a first connecting portion that connects the tip portion and the upper seal portion, and a second connecting portion that connects the tip portion and the lower seal portion,
The first connecting portion includes a peeling regulating portion that restricts peeling of the first connecting portion proceeding from the tip side toward the upper seal portion side,
The unsealed portion includes an unsealed portion defining edge that defines an edge of the unsealed portion,
The unsealed part defining edge includes an upper end of the unsealed part defining edge connected to the outer edge of the upper sealed part and a lower end of the unsealed part defining edge connected to the outer edge of the lower sealed part, and the housing space and the unsealed part are connected to each other. In the state in which an opening is formed that connects the opening, a first opening edge that is the edge of the opening formed in the peeling regulating part, and a second opening edge that is the edge of the opening formed in the second connecting part. including an opening edge;
The peeling regulating portion is arranged so that a straight line passing through the first opening edge and the second opening edge is inclined inward in the width direction of the pouch as it goes upward of the pouch. Prevents peeling of connections
Pouch. The first connecting portion further includes a side end portion connecting the peeling regulating portion and the upper seal portion,
The second seal part is provided between the upper seal part and the lower seal part.
The pouch according to claim 1. the upper sealed portion includes an outer edge defining the unsealed portion;
The pouch according to claim 2, wherein the side end portion includes a portion that protrudes toward the lower seal portion with respect to an outer edge of the upper seal portion. The side end portion includes an inner edge defining the accommodation space,
The inner edge is inclined downwardly of the pouch as it goes from the upper seal portion side toward the accommodation space side in the width direction of the pouch.
The pouch according to claim 2 or 3 . The second opening edge is located outward relative to the first opening edge in the width direction of the pouch.
The pouch according to any one of claims 1 to 4 .

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