JP7095218B2 - Pouch - Google Patents

Description

The present invention relates to a pouch used to heat the contents.

Pouches used to heat the 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 formed so as to be recessed toward the accommodating space side of the pouch. When this pouch is heated by a heating means such as a microwave oven, the seal of the recessed portion is peeled off as the internal pressure of the accommodation space increases, so that an opening is formed in the recessed portion, and water vapor passes through the opening and the pouch. It is discharged to the outside of.

WO2013 / 133092 Gazette

If the pouch is tilted after the heating of the pouch is completed, a large amount of contents may leak to the outside of the pouch through the opening formed in the recessed portion.
An object of the present invention is to provide a pouch in which a situation in which a large amount of contents leak from an opening formed by peeling a seal is unlikely to occur.

[1] One form of the pouch according to the present invention seals the pair of stacked sheets and the pair of sheets so that a storage space capable of accommodating the contents is formed between the pair of sheets. A portion, a seal portion including a first seal portion along the edge of the pair of sheets, and a second seal portion having a shape recessed toward the accommodation space side, and a part of the pair of sheets. The second sealed portion is provided with an unsealed portion that is an unsealed portion surrounded by the second sealed portion, and the pressure of the accommodation space of the second sealed portion is increased by the steam generated from the contents. The connection portion includes a tip portion configured to be peeled off due to stress concentration in the case of the above, and a connection portion connecting the tip portion and the first seal portion, and the connection portion is the first from the tip portion side. Includes a peeling control section that regulates the peeling of the second seal section that progresses toward the seal section side of 1.

The contents are put into the accommodating space of the pouch, and the opening of the pouch is sealed so that the accommodating space is closed, whereby a pouch that takes a closed state is formed. When the closed pouch is heated, water vapor is generated from the contents and the pressure in the accommodation space rises. When the tip of the second seal is peeled off as the pressure rises, an opening is formed at the tip. Since the peeling restricting portion is provided in the second sealing portion, the peeling of the seal in the second sealing portion is regulated by the peeling restricting portion. The water vapor staying in the accommodation space passes through at least the opening formed at the tip portion and the passage formed between the pair of sheets in the unsealed portion, and is discharged to the outside of the edge of the pair of sheets. ..

According to the above pouch, since water vapor is discharged to the outside of the accommodation space in this way, it is difficult to burst. Further, the size of the opening formed in the second seal portion by the peeling of the second seal portion is defined by the peeling restricting portion, and an opening larger than the planned size is formed in the second seal portion. It is hard to be done. Therefore, even if the pouch is tilted after the heating of the pouch is completed, it is unlikely that a large amount of contents will leak from the opening formed in the second seal portion. Further, 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 steam. When the surfaces of the sheets 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 is hindered by the close contact unsealed portions, and the contents are paired. It is less likely to leak to the outside than the edge of the sheet.

[2] According to an example of the pouch, the peeling restricting portion includes a portion having a wider sealing width than the tip portion.
[3] According to an example of the pouch, the seal width of the peeling restricting portion becomes wider toward the first sealing portion side from the tip portion side.

[4] According to an example of the pouch, the connection portion is a first connection portion that connects one end portion of the tip portion and the first end portion constituting the first seal portion, and the connection portion. A second connection portion connecting the other end portion of the tip portion and the second end portion constituting the first seal portion is included, and one of the first connection portion and the second connection portion is said. The peeling restricting 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 an example of the pouch, the second seal portion is configured so that the tip portion faces the center of the accommodation space.
[6] According to an example of the pouch, the contents are provided in the accommodation space.

According to the pouch, it is unlikely that a large amount of contents will leak from the opening formed by the peeling of the seal.

The front view of the pouch of the embodiment which takes an open state. Front view of the pouch of the embodiment which takes a closed state. Enlarged view of the steam sealing part of FIGS. 1 and 2. The front view which shows the state which the tip part of the steaming seal part of the pouch of FIG. 2 was peeled off. The figure which shows the state which the pouch of FIG. 4 is tilted. The figure which shows the state which the upper seal part of FIG. 5 is cut off.

(Embodiment)
1 and 2 show an example of the configuration of the pouch 1. The form of pouch 1 is a standing pouch. The possible states of the pouch 1 include at least an open state and a closed state. In another example, the form of the pouch 1 is a flat pouch. FIG. 1 shows the pouch 1 in the open state, and FIG. 2 shows the pouch 1 in the closed state. The open state of the pouch 1 is a state in which the content 100 is not thrown 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 content 100 is put into the pouch 1 and the opening 15 is sealed. The content 100 is, for example, a food containing a sauce. In one example, a closed pouch 1 is provided to the 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 superposed sheets. The pouch 1 in the open state is provided with a sealing portion 20 in which the sheets 11 to 13 are sealed to each other. The dots shown in FIGS. 1 to 6 indicate the sealed portions of the sheets 11 to 13.

Each sheet 11 to 13 has, for example, the following layer structure.
Each sheet 11 to 13 includes an outermost layer, an intermediate layer, and an innermost layer. An example of the material constituting the outermost layer is a transparent material. An example of a transparent material is polyethylene terephthalate. The intermediate layer includes a printing layer, a first adhesive layer, a stretched nylon layer, and a second adhesive layer. The print layer is provided inside the outermost layer. In one example, a pattern, a text of a product description, or the like is printed on the outer surface of the print layer. The first adhesive layer is provided inside the print layer. The stretched nylon layer is provided inside the first adhesive layer. The second adhesive layer is provided inside the stretched nylon layer. An example of the material constituting each adhesive layer is a dry laminate 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 the first seal portion, and is a portion where one side portion 11A of the first sheet 11 and one side portion 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 in which the sheets 11 to 13 are sealed to each other so that the gusset seal portion 23 of the pouch 1 is formed.

Since each of the sheets 11 to 13 is sealed by the sealing portion 20, a storage space 14 capable of accommodating the content 100 is formed between the first sheet 11 and the second sheet 12. An opening 15 for opening the accommodation space 14 is provided in the upper part of the pouch 1 in the open state. The contents 100 are put into the accommodation space 14, and the sheets 11 and 12 are sealed so that the opening 15 is closed, whereby the closed pouch 1 shown in FIG. 2 is configured. The seal portion 20 of the closed pouch 1 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 on the upper portion of the second side seal portion 22. A cut line (not shown) connecting to the notch 22A is provided on the upper portion of the pouch 1. 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 to form the pouch 1 in a used state. The end user can retrieve the content 100 from the open opening 15.

The first side seal portion 21 includes an upper seal portion 21A, a lower seal portion 21B, and a steaming seal portion 30. The upper seal portion 21A and the lower seal portion 21B are portions sealed along the edges of the sheets 11 and 12. The steaming seal portion 30 is an example of the second seal portion, and is for discharging the steam generated from the content 100 as the closed pouch 1 is heated by the heating means to the outside of the accommodation space 14. It is a provided part. The steam-permeable seal portion 30 is continuous with the upper seal portion 21A and the lower seal portion 21B, respectively, and together with these seal portions 21A and 21B, the side portion 11A of the first sheet 11 and the side portion 12A of the second sheet 12 are formed. It is sealed.

FIG. 3 is an enlarged view of the steaming seal portion 30. The shape of the steam-permeable seal portion 30 is a shape recessed from the outer edges 11C and 12C sides of the sheets 11 and 12 toward the accommodation space 14. The steam sealing portion 30 includes a tip portion 40 and a connecting portion 50. The tip portion 40 is provided at a position where strong stress concentration occurs in the sheets 11 and 12 when the pressure in the accommodation space 14 rises due to the water vapor generated from the content 100 in the closed pouch 1. Therefore, when the internal pressure of the closed pouch 1 rises, at least the tip portion 40 of the ventilation seal portion 30 is peeled off, and the opening 31 (the opening 31 connecting the accommodation space 14 and the outside of the accommodation space 14 to the peeled portion). (See FIG. 4) is formed.

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

The first connecting portion 60 includes a peeling restricting portion 61 that regulates peeling of the steam sealing portion 30 that progresses from the tip portion 40 side toward the upper sealing portion 21A side, and the peeling regulating portion 61 and the upper sealing portion 21A. Includes a side end 62 that connects the two. The peeling restricting portion 61 is inclined toward the opening 15 side from the tip portion 40 side toward the upper sealing portion 21A side. The side side end portion 62 connects the end portion of the peeling restricting portion 61 and the upper sealing portion 21A, and is inclined from the end portion of the peeling restricting portion 61 toward the upper sealing portion 21A side.

The seal width XA of the peeling restricting portion 61 becomes wider from the tip portion 40 side toward the upper sealing portion 21A side. The maximum dimension of the seal width XA of the peeling restricting portion 61 is the first side sealing portion 21 side of the steaming sealing portion 30 with respect to the peeling restricting portion 61 even when the internal pressure of the accommodation space 14 is the highest. The size is such that the part of is not peeled off. The second connecting portion 70 extends in the width direction of the pouch 1. The seal width XB of the second connecting portion 70 is constant. The seal width XA is the dimension of the perpendicular line drawn from the outer edge 61A of the peeling restricting portion 61 to the inner edge 61B, and the seal width XB is the dimension of the perpendicular line drawn from the outer edge 70A of the second connecting portion 70 to the inner edge 70B.

The pouch 1 further includes an unsealed portion 80. The unsealed portion 80 is a part of each of the sheets 11 and 12, and is a portion surrounded by the outer edge 20A of the first side-sealed portion 21, and the first unsealed portion 81 and the second unsealed portion 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 steam-passing seal portion 30, and is a portion surrounded by the outer edge 30A of the steam-passing seal portion 30. The second unsealed portion 82 is a portion including the outer edges 11C and 12C of the sheets 11 and 12, and is a portion formed between the end portion of the upper seal portion 21A and the end portion of the lower seal portion 21B.

An example of how the pouch 1 is used by the end user will be described.
First, the closed pouch 1 is placed in a heating means (not shown) such as a microwave oven, and is heated by the heating means. After heating is complete, the pouch 1 is carried by the end user as shown in FIG. Next, as shown in FIG. 6, the portion including the notch 22A and the cut line (not shown) including the upper seal portion 24 is cut by the end user to open the opening 15. Next, the content 100 is 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 content 100, and the pressure in the accommodation space 14 gradually increases. Therefore, the first sheet 11 and the second sheet 12 expand in a direction in which they are separated from each other, and the tip portion 40 of the steam-permeable seal portion 30 is peeled off to form an opening 31. After the tip portion 40 is peeled off, the peeling of the steam sealing portion 30 proceeds toward the first side seal portion 21. Since the peeling restricting portion 61 is provided in the first connecting portion 60, for example, the peeling of the seal in the steaming sealing portion 30 ends at the widest portion of the seal width XA of the peeling restricting portion 61. When the amount of water vapor generated from the content 100 is small, the peeling of the seal in the steaming 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 accommodation space 14 passes through the opening 31 formed in at least the tip portion 40 and the passage formed between the pair of sheets 11 and 12 in the unsealed portion 80, and the sheets 11 and 12, respectively. It is discharged to the outside of the outer edges 11C and 12C of. Therefore, the pouch 1 is unlikely to burst.

The size of the opening 31 formed in the steam sealing portion 30 by peeling of the steam sealing portion 30 is defined by the peeling restricting portion 61, and an opening larger than the planned size of the opening 31 is formed in the steam sealing portion 30. Hard to form. Therefore, even if the pouch 1 is tilted after the heating of the pouch 1 is completed, it is unlikely that a large amount of the contents 100 will leak from the opening 31 formed in the steam sealing portion 30. Further, when the heating of the pouch 1 is completed, the surfaces of the sheets 11 and 12 constituting the unsealed portion 80 are in close contact with each other by steam. Therefore, even if the content 100 passes through the opening 31 formed in the steaming seal portion 30, the movement of the content 100 is hindered by the unsealed portion 80 in close contact with the content 100, and the content 100 is blocked by the sheets 11 and 12, respectively. It is less likely to leak to the outside than the outer edges 11C and 12C.

Further, the seal width XA of the peeling restricting portion 61 gradually widens from the tip portion 40 side toward the upper sealing portion 21A side. Therefore, in the process of progressing the peeling of the peeling regulating section 61, stress concentration is unlikely to occur locally in the peeling regulating section 61, and the peeling proceeds stably until the peeling is regulated by the peeling regulating section 61.

Further, since the side side end portion 62 is inclined from the end portion of the peeling restriction portion 61 toward the upper seal portion 21A side, the steam seal portion 30 of the first sheet 11 and the second sheet 12 is used. It is also possible to secure a wide area for forming a cut line or the like upward.

(Modification example)
The description of the above embodiment is an example of possible embodiments of the pouch according to the present invention and is not intended to limit the embodiments. The pouch according to the present invention may take, for example, a modification of the above embodiment shown below and a combination of at least two variants that do not contradict each other.

-The shape of the steam sealing portion 30 can be arbitrarily changed. In the first example, the side end portion 62 is omitted from the first connecting portion 60, and the peeling restricting portion 61 is connected to the upper seal portion 21A. The seal width XA of the peeling restricting portion 61 becomes wider from the tip portion 40 side toward the upper sealing portion 21A side. In the second example, a seal portion having a shape different from that of the peeling restricting portion 61 is provided between the tip portion 40 and the peeling restricting 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 from the tip portion 40 toward the peeling restriction portion 61. In the third example, in addition to the first connecting portion 60, the second connecting portion 70 is also provided with a peeling restricting portion. The peeling restricting portion of the second connecting portion 70 has, for example, a shape similar to the shape of the peeling restricting portion 61 of the first connecting portion 60. In the fourth example, the peeling restricting portion is provided only on the second connecting portion 70.

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

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

Claims (6)

A pair of superposed sheets and
A portion that seals the pair of sheets to each other so that a storage space capable of accommodating the contents is formed between the pair of sheets, a first sealing portion along the edge of the pair of sheets, and the said. A seal portion including a second seal portion having a shape recessed toward the accommodation space side,
It is provided with an unsealed portion that is a part of the pair of sheets and is an unsealed portion.
The second seal portion includes a tip portion configured to be peeled off due to stress concentration when the pressure in the accommodation space rises due to water vapor generated from the contents, the tip portion, and the first seal portion. Including the connection part that connects to the seal part of
The connection portion includes a peeling control portion that regulates peeling of the second seal portion that progresses from the tip portion side toward the first seal portion side.
The connection portion is a first connection portion connecting one end portion of the tip portion and the first end portion constituting the first seal portion, and the other end portion of the tip portion and the first end portion. Includes a second connection that connects to the second end that constitutes the seal.
One of the first connecting portion and the second connecting portion includes the peeling restricting portion.
The other of the first connecting portion and the second connecting portion does not include the peeling restricting portion.
The first sealing portion includes an upper sealing portion and a lower sealing portion sealed along the edges of the pair of sheets.
The unsealed portion is a portion including a first unsealed portion surrounded by the second sealed portion, which is an unsealed portion, and an edge of the pair of sheets, and includes an end portion of the upper sealed portion. The second unsealed portion includes the second unsealed portion formed between the end portion of the lower sealed portion and does not include a hole penetrating the pair of sheets, and the second unsealed portion is inserted through the peeled tip portion. It is configured so that the water vapor flowing out to the portion passes between the edges of the pair of sheets and is discharged to the outside.
Pouch. The first connection is located above the second connection.
The pouch according to claim 1. The other outer and inner edges of the first connection and the second connection are parallel to the width of the pouch.
The pouch according to claim 1 or 2. The pouch according to any one of claims 1 to 3, wherein the length of the first connection portion is longer than the length of the second connection portion. The pouch according to any one of claims 1 to 4, wherein the second sealing portion is configured so that the tip portion faces the center of the accommodation space. The pouch according to any one of claims 1 to 5, comprising the contents put into the accommodation space.

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