JP7226628B2 - pouch - Google Patents

Description

The present invention relates to pouches used for heating contents.

Pouches that are used to heat the contents are known. This pouch is provided with a structure for discharging the steam 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 accommodation space side of the pouch. When this pouch is heated by a heating means such as a microwave oven, the seal at the recessed portion is peeled off as the internal pressure of the storage space rises, forming an opening in the recessed portion, through which water vapor passes and reaches the pouch. is discharged to the outside of the

WO2013/133092

If the pouch is tilted after the pouch has been heated, a large amount of the contents may leak out of the pouch through the opening formed in the recessed portion.
SUMMARY OF THE INVENTION An object of the present invention is to provide a pouch in which a large amount of content is less likely to leak from an opening formed by peeling of a seal.

[1] One form of the pouch according to the present invention is a pair of superimposed sheets, and the pair of sheets are sealed together so that an accommodation space capable of accommodating contents is formed between the pair of sheets. a seal portion including a first seal portion along the edges of the pair of sheets and a second seal portion having a shape recessed toward the accommodation space; and an unsealed portion that is an unsealed portion surrounded by the second seal portion, and the second seal portion is configured such that the pressure in the accommodation space rises due to water vapor generated from the contents. and a connection portion connecting the tip portion and the first seal portion, wherein the connection portion extends from the tip portion side to the first seal portion. It includes a peeling restricting portion that restricts peeling of the second seal portion advancing 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 that takes a closed state. When the closed pouch is heated, water vapor is generated from the contents, and the pressure in the containing space increases. When the tip portion of the second seal portion is peeled off as the pressure rises, an opening is formed in the tip portion. Since the second seal portion is provided with the peeling restricting portion, peeling of the seal at the second seal portion is restricted by the peeling restricting portion. Water vapor remaining in the housing space passes through the opening formed at least at the tip and the passage formed between the pair of sheets in the unsealed portion, and is discharged outside the edges of the pair of sheets. .

According to the above pouch, steam is discharged to the outside of the storage space in this way, so that the pouch is less likely to burst. Further, the size of the opening formed in the second seal portion by peeling of the second seal portion is regulated by the peel regulation portion, and an opening larger than the predetermined size of the opening is formed in the second seal portion. hard to be Therefore, even if the pouch is tilted after the pouch is heated, it is unlikely that a large amount of contents will leak from the opening formed in the second seal portion. In addition, when the heating of the pouch is completed, the surfaces of the sheets constituting the unsealed portion are likely to adhere to each other due to water vapor. 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 unsealed portions in close contact with each other, and the contents are separated from each other. It is difficult to leak outside the edge of the seat.

[2] According to one example of the pouch, the peel-regulating portion includes a portion with a wider sealing width than the tip portion.
[3] According to one example of the pouch, the seal width of the peel restricting portion increases from the tip end side toward the first seal portion side.

[4] According to one example of the pouch, the connecting portion includes a first connecting portion that connects one end of the tip portion and a first end that constitutes the first sealing portion, and the A second connecting portion connecting the other end of the tip portion and a second end constituting the first sealing portion, wherein one of the first connecting portion and the second connecting portion is the A 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 one 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 one example of the pouch, the pouch includes the contents put into the accommodation space.

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

1 is a front view of an embodiment pouch in an open state; FIG. Fig. 2 is a front view of an embodiment pouch in a closed state; FIG. 3 is an enlarged view of the vapor-permeable seal portion of FIGS. 1 and 2; FIG. 3 is a front view showing a state in which the tip of the vapor-sealing portion of the pouch of FIG. 2 has been peeled off; FIG. 5 is a diagram showing a state in which the pouch of FIG. 4 is tilted; The figure which shows the state by which the upper seal|sticker part of FIG. 5 was cut away.

(embodiment)
1 and 2 show an example of the configuration of the pouch 1. FIG. The form of pouch 1 is a standing pouch. The states that the pouch 1 can take include at least an open state and a closed state. In another example, the form of the pouch 1 is a flat pouch. Figure 1 shows the pouch 1 in an open state and Figure 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, food including sauce. In one example, a closed pouch 1 is provided to the end user.

As shown in FIG. 1, pouch 1 includes first sheet 11, second sheet 12, and gusset sheet 13. Sheet 11 is a first sheet. The first sheet 11 and the second sheet 12 are a pair of overlaid sheets. The open pouch 1 is provided with a seal portion 20 in which the sheets 11 to 13 are sealed to each other. The dots shown in FIGS. 1-6 indicate the sealed portions of the sheets 11-13.

Each of the sheets 11-13 has, for example, the following layer structure.
Each sheet 11-13 includes an outermost layer, an intermediate layer and an innermost layer. An example of a material that constitutes 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, an oriented nylon layer and a second adhesive layer. The printed layer is provided inside the outermost layer. In one example, a pattern and a product description text are printed on the outer surface of the print layer. A first adhesive layer is provided inside the printing layer. An oriented nylon layer is provided inside the first adhesive layer. A second adhesive layer is provided inside the oriented nylon layer. An example of the material forming each adhesive layer is a dry lamination adhesive. The innermost layer is provided inside the second adhesive layer. An example of the material that constitutes 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 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 where the sheets 11 to 13 are sealed together so that the gusset seal portion 23 of the pouch 1 is formed.

Since each of the sheets 11 to 13 is sealed 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. As shown in FIG. An opening 15 that opens the storage space 14 is provided at the top of the open pouch 1 . 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 closed pouch 1 shown in FIG. 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 in the upper portion of the second side seal portion 22 . A perforation line (not shown) connected to the notch 22A is provided in the upper portion of the pouch 1 . A portion of the pouch 1 including the upper seal portion 24 is cut off from the notch 22A along the tear line to open the opening 15 and configure the pouch 1 in use. An end user can take out the contents 100 from the opened opening 15 .

The first side seal portion 21 includes an upper seal portion 21A, a lower seal portion 21B, and a permeable seal portion 30. As shown in FIG. The upper seal portion 21A and the lower seal portion 21B are portions sealed along the edges of the sheets 11 and 12, respectively. The steam-passing seal portion 30 is an example of a second seal portion, and is used to discharge steam generated from the content 100 to the outside of the housing space 14 as the pouch 1 in the closed state is heated by the heating means. This is the part provided. The permeable seal portion 30 is continuous with the upper seal portion 21A and the lower seal portion 21B, respectively, 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. Sealed.

FIG. 3 is an enlarged view of the steam sealing portion 30. As shown in FIG. The vapor-permeable seal portion 30 has a shape recessed from the outer edges 11C and 12C of the sheets 11 and 12 toward the housing space 14 . Vapor seal portion 30 includes tip portion 40 and connecting portion 50 . The tip portion 40 is provided at a location where a strong stress concentration occurs in each of the sheets 11 and 12 when the pressure in the containing space 14 rises due to the steam generated from the content 100 in the closed pouch 1 . Therefore, when the internal pressure of the pouch 1 in the closed state increases, at least the tip portion 40 of the vapor-permeable seal portion 30 is peeled off, and the peeled portion is the opening 31 ( 4) are formed.

The connection portion 50 includes a first connection portion 60 connecting 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. It includes a second connecting portion 70 that connects with the portion 26 .

The first connecting portion 60 includes a peeling restricting portion 61 that restricts peeling of the permeable seal portion 30 progressing from the tip portion 40 side toward the upper sealing portion 21A, and the peeling restricting portion 61 and the upper sealing portion 21A. It includes a side end portion 62 that connects the . The peeling restricting portion 61 is inclined toward the opening portion 15 side from the tip portion 40 side toward the upper seal portion 21A side. The side end portion 62 connects the end portion of the peel restricting portion 61 and the upper seal portion 21A, and is inclined from the end portion of the peel restricting portion 61 toward the upper seal portion 21A.

The seal width XA of the separation restricting portion 61 increases from the tip portion 40 side toward the upper seal portion 21A side. The maximum dimension of the seal width XA of the separation restricting portion 61 is the first side seal portion 21 side of the ventilation seal portion 30 relative to the separation restricting portion 61 even when the internal pressure of the housing space 14 is the highest. It is a dimension that does not peel off the part. 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 a vertical line extending from the outer edge 61A to the inner edge 61B of the separation restricting portion 61, and the seal width XB is the dimension of a vertical line extending from the outer edge 70A to the inner edge 70B of the second connecting portion 70.

Pouch 1 further includes an unsealed portion 80 . The unsealed portion 80 is a part of each of the sheets 11 and 12, is a portion surrounded by the outer edge 20A of the first side seal portion 21, and includes a first unsealed portion 81 and a second unsealed portion 82. including. The surfaces of the sheets 11 and 12 forming the unsealed portion 80 are not sealed. The first unsealed portion 81 is a portion corresponding to the depression of the vapor-transmitting seal portion 30 and is a portion surrounded by the outer edge 30A of the vapor-transmitting 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 of the upper seal portion 21A and the end of the lower seal portion 21B.

An example of how the pouch 1 is used by an end user will be described.
First, the closed pouch 1 is placed in a heating means (not shown) such as a microwave oven and heated by the heating means. After heating is finished, the pouch 1 is carried by the end user as shown in FIG. Next, as shown in FIG. 6, the end user cuts the portion including the upper seal portion 24 along the notch 22A and the tear line (not shown) to open the opening 15. As shown in FIG. 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 are obtained.
When the pouch 1 in the closed state is heated by the heating means, water vapor is generated from the content 100, and the pressure in the containing space 14 gradually increases. As a result, 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-permeable seal portion 30 progresses 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 permeable 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 contents 100 is small, peeling of the seal in the vapor-permeable 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 remaining in the housing 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, outside the outer edges 11C and 12C. Therefore, the pouch 1 is less likely to burst.

The size of the opening 31 formed in the vaporization seal portion 30 by peeling of the vaporization seal portion 30 is regulated by the peeling regulation portion 61, and the opening larger than the opening 31 of the planned size is formed in the vaporization seal portion 30. difficult to form. For this reason, even if the pouch 1 is tilted after the 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-permeable seal portion 30 is unlikely to occur. Moreover, 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 the steam. Therefore, even if the contents 100 pass through the opening 31 formed in the vapor-sealing portion 30 , the movement of the contents 100 is prevented by the tight unsealed portion 80 , and the contents 100 are separated from the sheets 11 and 12 . It is less likely to leak to the outside than the outer edges 11C and 12C.

In addition, the seal width XA of the separation restricting portion 61 gradually widens from the tip portion 40 side toward the upper seal portion 21A side. For this reason, in the process in which peeling of the peeling restricting portion 61 progresses, local stress concentration is less likely to occur in the peeling restricting portion 61 , and peeling proceeds stably until the peeling is restricted by the peeling restricting portion 61 .

In addition, since the side end portion 62 is inclined from the end portion of the peeling restricting portion 61 toward the upper seal portion 21A, the vapor-sealing portion 30 of the first sheet 11 and the second sheet 12 is inclined. It is possible to secure a wide area for forming a perforation line or the like above.

(Modification)
The description of the above embodiments is illustrative of the forms that the pouch according to the invention can take, and is not intended to limit the forms. A pouch according to the present invention can take the form of, for example, the variations of the above-described embodiments shown below, and combinations of at least two variations that are not mutually contradictory.

- The shape of the vapor-permeable seal part 30 can be changed arbitrarily. In the first example, the side end portion 62 is omitted from the first connecting portion 60, and the separation restricting portion 61 is connected to the upper seal portion 21A. The seal width XA of the separation restricting portion 61 increases from the tip portion 40 side toward the upper seal portion 21A side. In the second example, a sealing 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 separation restricting portion 61 . In the third example, in addition to the first connection portion 60 , the second connection portion 70 is also provided with a peeling restricting portion. The peeling restricting portion of the second connecting portion 70 has a shape conforming to the shape of the peeling restricting portion 61 of the first connecting portion 60, for example. In the fourth example, only the second connecting portion 70 is provided with the peeling restricting 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 formed by folding one sheet. In the second example, each sheet 11-13 is formed by folding one sheet.

Reference Signs List 1: pouch 11: first sheet 12: second sheet 14: housing space 20: seal portion 21: first side seal portion (first seal portion)
25: end (first end)
26: end (second end)
30: Vapor sealing portion (second sealing portion)
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 (6)

a pair of superimposed sheets;
a first sealing portion along edges of the pair of sheets, which is a portion for sealing the pair of sheets so that a storage space capable of storing contents is formed between the pair of sheets; a seal portion including a second seal portion having a shape recessed toward the accommodation space;
An unsealed portion that is a part of the pair of sheets and is an unsealed portion surrounded by the second seal portion;
The second sealing portion includes a tip portion configured to separate due to stress concentration when the pressure in the housing space rises due to water vapor generated from the contents; and a connecting portion that connects the sealing portion of
The connecting portion includes a peeling regulating portion that regulates peeling of the second seal portion proceeding from the tip portion side toward the first seal portion side , and the peeling regulating portion and the first seal portion. In a state in which an opening connecting the accommodation space and the unsealed portion is formed by peeling of the connection portion, the side end portion includes a portion that is not peeled. composed
pouch. 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 is provided between the upper seal portion and the lower seal portion;
The side end portion is connected to the upper seal portion
The pouch of Claim 1. the upper sealed portion includes an outer edge defining the unsealed portion;
The side end portion includes a portion that protrudes toward the lower seal portion with respect to the outer edge of the upper seal portion.
A pouch according to claim 2. The connection portion includes a second connection portion that connects the distal end portion and the lower seal portion. is configured to form an opening edge that is the edge of the second seal portion that defines the end of
the opening edge includes a first opening edge formed in the peeling restricting portion and a second opening edge formed in the second connecting portion;
The second opening edge is located outwardly with respect to the width direction of the pouch with respect to the first opening edge.
A pouch according to claim 2 or 3. A straight line passing through the first opening edge facing the unsealed portion and the second opening edge facing the unsealed portion extends inward in the width direction of the pouch as it goes upward of the pouch. tilt toward
A pouch according to claim 4. The side end portion includes an inner edge that defines the accommodation space,
The inner edge is slanted downward of the pouch from the upper seal portion side toward the housing space side in the width direction of the pouch.
The pouch according to any one of claims 2-5.

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