JP2023112640A - Pouch for microwave oven - Google Patents

Abstract

To provide a pouch for a microwave oven capable of both securing a sufficient steam release property and suppressing content leakage.SOLUTION: A pouch for microwave oven 10 has a steam releasing mechanism 40 which has a steam releasing seal part 43 formed of heat-sealing a first film 41 and a second film 42, a flap piece 41b partitioned by a slit 41a formed in the first film 41 in a steam opening part 44, and steam releasing holes 42a formed in the second film 42 in the steam opening part 44 so that at least a part thereof overlaps the flap piece 41b in a front-back direction.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a pouch for a microwave oven provided with a steam release mechanism for automatically releasing steam inside during heating.

Conventionally, there is a packaged food on the market that contains cooked or semi-cooked food in a pouch that is formed into a bag shape by thermally adhering stacked films, and heats and cooks the food in a microwave oven when eating the food. It's out.

When such pouches for microwave ovens are heated in a microwave oven, the internal pressure of the pouch increases due to the thermal expansion of the steam generated from the food and the internal air. may scatter.

Therefore, in recent years, it is known that a microwave pouch is generally provided with a steam venting mechanism that automatically releases the steam inside during heating (see, for example, Patent Document 1), and such a steam venting mechanism is known. As one aspect, a vapor release seal portion that is formed by heat-sealing the stacked films and isolates the vapor release portion from the content storage portion, and one of the two films arranged in the vapor release portion is penetratingly formed. It is known to have vents and vent holes.

In the microwave pouch disclosed in Patent Document 1, when the pressure inside the content-accommodating portion increases due to heating by the microwave oven, a portion of the steam-releasing seal portion is peeled off to separate the content-accommodating portion and the steam release portion. , and the steam in the content-accommodating portion is discharged to the outside through the steam vent hole.

Japanese Patent Application Laid-Open No. 2003-192042

However, in a microwave oven pouch equipped with such a steam release mechanism, if the size of the steam release hole for releasing steam is increased, the release of steam during heating can be sufficiently ensured, but depending on the heating state, On the other hand, if the size of the steam vent hole that releases steam is made small or if a slit is formed instead of the steam vent hole, Depending on the degree of expansion of the pouch, sufficient steam release cannot be ensured, and there is a problem that the expansion of the pouch due to steam is maintained for a long time, causing thermal damage to the inner surface material of the pouch.

Therefore, the present invention is intended to solve these problems, and it is an object of the present invention to provide a pouch for microwave ovens that has a simple structure and achieves both steam release properties and suppression of content leakage. is.

The present invention is a microwave oven provided with a steam release section isolated from a content storage section by a steam release seal section, and a steam release mechanism for discharging steam in the content storage section to the outside from the steam release section during heating. the vapor release mechanism includes a first film and a second film that are placed one on top of the other, the steam release seal part formed by heat-sealing the first film and the second film, A flap piece partitioned by a slit formed in the first film in the vapor release portion, and a flap piece formed in the second film in the vapor release portion so that at least a part of the flap piece overlaps the flap piece in the front and back direction. The problem is solved by having a steam vent hole.

According to the invention of claim 1, by forming a steam release hole in the second film and forming a slit for partitioning the flap pieces in the first film, the release of steam and the suppression of leakage of the contents are improved. It is possible to achieve both.

According to the second aspect of the invention, the second film has an overlapped peripheral edge portion that overlaps a part of the flap piece in the front and back direction at the peripheral edge portion of the steam vent hole. The peripheral portion prevents the flap from moving toward the second film and prevents the flap from catching on the inner edge of the steam vent hole. Steam can be released properly.
According to the inventions of claims 3 and 4, the overlapping peripheral edge portion is formed so as to overlap in the front-back direction with at least a portion of the portion of the flap free end that is the furthest in the longitudinal direction from the flap base end. Due to this, the overlapping peripheral portion can effectively prevent the movement of the entire flap piece toward the second film.
According to the fifth aspect of the invention, the flap piece has a portion formed closer to the scheduled communication start portion than the portion closest to the scheduled communication start portion in the steam release hole, thereby heating Occasionally, it is possible to partially open the flap piece before steam begins to be released from the steam vent hole, so that the flap piece can be reliably opened and steam is released only from the steam vent hole. can be suppressed.
According to the sixth aspect of the invention, by arranging the second film having the vapor vent holes so as to face the front film of the pouch body, even if the contents leak through the vapor vent holes, Also, the leaked contents can be restrained between the pouch main body and the pouch bifurcation to prevent the contents from adhering to the outside of the pouch, which is easily visible from the outside. By arranging a second film having steam vent holes on the back side of the pouch body, the film is formed so as to be convex toward the front side of the front side film of the pouch body due to the expansion of the pouch body when heated. Since the crest of the flap can be guided to be formed on the back side of the flap, the convex film crest pushes up the flap from the back side so that the flap can be easily opened during heating. can be done.
According to the invention according to claim 7, the flap piece has a flap base end connected to the first film and a flap free end separated in the longitudinal direction from the flap base end, and the steam vent hole is arranged in the longitudinal direction Since the width in the horizontal direction is narrower than the vertical width, the crest of the film is formed to extend in the vertical direction in the vicinity of the flap piece and the steam vent hole. Therefore, the film crests extending in the longitudinal direction push up the flaps well, and the flaps can be easily opened during heating.
According to the eighth and ninth aspects of the invention, when viewed in the vertical direction, the formation range of the steam vent holes in the horizontal direction is set so as to be within the formation range of the flap pieces in the horizontal direction. The vertically extending film crests can guide the flaps to be pushed up, and the flaps can be easily opened during heating.
According to the tenth aspect of the invention, when viewed in the vertical direction, the overlapping peripheral edge has a portion positioned within the formation range of the steam vent hole in the horizontal direction, thereby utilizing the formation of the film crest portion. Then, the flap piece can be pushed up from the back side also by the overlapped peripheral edge portion which overlaps the flap piece in the front and back direction, so that the flap piece can be easily opened during heating.
According to the eleventh aspect of the invention, by forming the flap piece and the steam release hole at a position where the crest of the film crest is likely to be formed due to the swelling of the pouch body during heating, the crest of the crest of the film is It becomes easy to form on the back side position of a flap piece.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing a microwave pouch according to one embodiment of the present invention; Explanatory drawing mainly showing a steam venting mechanism. Explanatory drawing explaining the relationship between a flap piece and a steam vent hole. Explanatory drawing explaining a film crest part. Explanatory drawing which shows the modification of a steam vent mechanism. Explanatory drawing which shows the modification of the pouch for microwave ovens. Explanatory drawing which shows the modification of a steam vent mechanism.

Below, the pouch 10 for microwave ovens which concerns on one Embodiment of this invention is demonstrated based on drawing.

First, as shown in FIG. 1, a microwave pouch 10 is formed into a bag shape by forming a bag-making seal portion 11 in which a resin film is heat-bonded at predetermined locations. Contents such as food are stored in the container.

As shown in FIG. 1, a pouch 10 for a microwave oven according to the present embodiment includes a pouch body 20 having a content-accommodating portion 12, and pouch branches formed so as to protrude from a front side film 21 constituting the pouch body 20 to the front side. It is configured as a so-called bifurcated pouch having a portion 30 .

As shown in FIG. 1, the pouch body 20 has a front side film 21 and a back side film 22 which are superimposed in the front and back directions, and a bag-making seal portion 11 (top seal) formed by heat-sealing predetermined portions of these films 21 and 22 to each other. By forming the portion 11a and the side seal portion 11b), it is configured in a bag shape.

As shown in FIG. 1, the pouch branching part 30 is configured as a part that protrudes from the front film 21 of the pouch main body 20 to the front side over the entire length of the pouch in the left-right direction in the middle of the pouch in the vertical direction. .
As shown in FIG. 1 , the pouch branching portion 30 is a portion formed so as to protrude from the front film 21 of the pouch body 20 to the front side, and the second film is arranged so as to face the front film 21 of the pouch body 20 . 42 and the first film 41 arranged on the front side of the second film 42 .

At the upper end portion 31 of the pouch branch portion 30, as shown in FIG. 1, the films 41 and 42 are connected (in this embodiment, formed continuously and integrally with each other). Alternatively, the films 41 and 42 may be formed separately, and the films 41 and 42 may be heat-sealed at the upper end portion 31 of the pouch branch portion 30 .
As shown in FIG. 1, films 41 and 42 are connected to the left and right sides of the pouch branch portion 30, and in this embodiment, the films 41 and 42 are heat-sealed at the side seal portion 11b.
Moreover, the films 41 and 42 are not connected at the lower end portion 32 of the pouch branch portion 30, as shown in FIG.
At the lower end portion 32 of the pouch branch portion 30, as shown in FIG. 1, the films 21 and 41 are connected (in this embodiment, they are formed continuously and integrally), and the films 21 and 42 are connected. (In this embodiment, they are formed continuously and integrally with each other). At the lower end portion 32 of the pouch branch portion 30, separately formed films 21 and 41 may be heat-sealed, or separately formed films 21 and 42 may be heat-sealed.
In addition, a crease is formed (creased) at the connecting portion between the second film 42 and the front side film 21 at the lower end portion 32 of the pouch branching portion 30, so that the pouch branching portion 30 is not loaded. In a state (especially a state in which no force is applied), the state in which the second film 42 faces the front side film 21 is maintained as shown in FIG.
Further, a crease is formed at the connecting portion between the films 41 and 42 at the upper end portion 31 of the pouch branching portion 30, and at the connecting portion between the first film 41 and the front side film 21 at the lower end portion 32 of the pouch branching portion 30. no creases are formed.

The microwave pouch 10 includes a steam release mechanism 40 for releasing steam generated in the content storage portion 12 to the outside of the pouch during heating by the microwave oven. In this embodiment, as shown in FIG. A vapor release mechanism 40 is formed in the pouch branch portion 30 .

As shown in FIG. 1, the vapor venting mechanism 40 includes a first film 41 and a second film 42 which are superimposed and a vapor venting seal portion formed by heat-sealing the first film 41 and the second film 42. 43, a vapor release portion 44 isolated from the contents accommodating portion 12 of the pouch body 20 by the vapor release seal portion 43, and a flap piece 41b partitioned by a slit 41a formed in the first film 41 in the vapor release portion 44. and a vapor release hole 42a formed in the second film 42 in the vapor release portion 44 so that at least a part thereof overlaps the flap piece 41b in the front and back direction.

The steam release mechanism 40 separates the steam release seal portion 43 by the steam generated in the content storage portion 12 during heating by the microwave oven, thereby allowing the content storage portion 12 and the steam release portion 44 to communicate with each other, thereby opening the content storage portion. The steam in the pouch 12 is released to the outside of the pouch through a steam release hole 42a and a slit 41a formed in the steam release portion 44. As shown in FIG.

Each component of the vapor venting mechanism 40 will be described below.

First, as shown in FIGS. 1 and 2, the flap piece 41b formed on the first film 41 is partially separated from the peripheral portion of the first film 41 in the vapor releasing portion 44 by the U-shaped slit 41a. It is a part that is physically separated and moves toward the front side by steam when heated.
As shown in FIG. 2, the flap piece 41b is a part of the outer peripheral edge of the flap piece 41b, extends linearly along the lateral direction X, and is connected (connected) to the first film 41. and a flap free end 41d which is a part of the outer periphery of the flap piece 41b and which is separated from the flap base end 41c in the longitudinal direction Y perpendicular to the lateral direction X. As shown in FIG.
As shown in FIG. 2, the flap piece 41b is formed so that the flap free end 41d is closer to the communication start scheduled portion 43a of the steam release seal portion 43 and the flap base end 41c is farther.
Here, the scheduled communication start portion 43a is a portion that is scheduled to initially communicate between the content-accommodating portion 12 and the steam release portion 44 by steam generated in the content-accommodating portion 12 during heating. This is a portion (seal peeling start portion) of the steam releasing seal portion 43 that is designed to start peeling first by the steam generated in the contents-accommodating portion 12 during heating.

In addition, as shown in FIG. 2, the second film 42 is formed with steam release holes 42a penetrating the second film 42 in the front and back directions.
As shown in FIG. 2, the second film 42 is provided on a part of the flap piece 41b so as to prevent the flap piece 41b from moving toward the second film 42 side (back side) at the periphery of the steam vent hole 42a. It has overlapping peripheral edge portions 42b that are arranged to overlap in the front and back direction.

Next, the specific design of the flap piece 41b and the vapor vent hole 42a and the relationship between the flap piece 41b and the vapor vent hole 42a will be described below.

First, as shown in FIG. 2 and FIGS. 5(a) and (f), the flap 41b (slit 41a) is located closer to the communication start portion 43a than the steam vent hole 42a. It is preferable to have the parts formed close together.
With this configuration, it is possible to partially open the flap piece 41b (to move it toward the front side) before steam starts to be released from the steam vent hole 42a during heating. It is possible to reliably open the piece 41b and prevent the steam from being released only from the steam vent hole 42a.

2 and FIGS. 5(a), 5(b), 5(e) and 5(f), the position of the overlapped peripheral portion 42b, which is a portion that overlaps the flap piece 41b in the front and back direction, is the position of the flap piece 41b. Of the flap free end 41d, the part farthest in the longitudinal direction Y from the flap base end 41c (of the flap free end 41d, the line part or point part with the largest separation dimension from the flap base end 41c in the longitudinal direction Y) It is preferable to set so that the overlapping peripheral edge portion 42b overlaps at least partially in the front-back direction.
With this configuration, the overlapping peripheral edge portion 42b can effectively prevent the entire flap piece 41b from moving toward the second film 42 side.
However, the specific setting of the position of the overlapping peripheral edge portion 42b is not limited to the above. As shown in FIG. 5(c), the overlapping peripheral edge portion 42b may overlap only the flap base end 41c side of the flap piece 41b.
Also, the number of overlapping peripheral edge portions 42b is not limited to one, and overlapping peripheral edge portions 42b may be formed at a plurality of locations apart from each other.

Further, in the example shown in FIG. 1, between the front film 21 of the pouch body 20 and the first film 41 on which the flap piece 41b is formed, at least a part of the film is formed so as to overlap the flap piece 41b in the front and back direction. A second film 42 having steam vent holes 42a is disposed.
When configured in this way, as shown in FIG. 4, the crests of the film crests are formed on the front side film 21 of the pouch body 20 so as to protrude toward the front side due to the expansion of the pouch body 20 during heating. 21a can be guided to be formed on the back side of the flap piece 41b. The flap piece 41b can be pushed up from the back side by bending the flap piece 41b in a convex shape toward the outside, so that the flap piece 41b can be easily opened during heating.
The film crest portion 21 referred to in this specification is not limited to being formed at the center of the pouch in the left-right direction (or at the center of the pouch in the longitudinal direction) as shown in FIG. It broadly means a convex portion toward the front side caused by bending (or bending).

Further, as shown in FIG. 3 (and FIGS. 5(e) and (f)), the steam vent hole 42a is more It is preferable to form so that the lateral width W1 in the lateral direction X (the lateral width W1 where the lateral width W1 is the widest) is narrower.
With this configuration, the film crest portion 21a can be guided to extend along the vertical direction Y in the vicinity of the flap piece 41b and the vapor vent hole 42a. The film crest portion 21a extending in the Y direction favorably pushes up the flap piece 41b so that the flap piece 41b can be easily opened during heating.
It should be noted that forming the width W1 of the steam vent hole 42a narrower makes it easier to ensure the height of the crest portion 21a of the film and the height of the bend that occurs in the second film 42 due to the formation of the crest portion 21a of the film.

3 (and FIGS. 5(a), (b), (c), (e), and (f)), when viewed in the vertical direction Y, the formation range R1 of the steam vent hole 42a in the horizontal direction X is , within the formation range R2 of the flap piece 41b in the lateral direction X.
With this configuration, the flap 41b can be favorably pushed up by the film crest 21a extending in the vertical direction Y, and the flap 41b can be easily opened during heating.

3 (and FIGS. 5(b), 5(e) and 5(f)), the width W2 of the flap piece 41b in the horizontal direction X (the width W2 of the portion where the width W2 is widest) is It is preferable to set the width W1 wider than the width W1 of the steam vent hole 42a (the width W1 at the widest portion).
With this configuration, the flap 41b can be favorably pushed up by the film crest 21a extending in the vertical direction Y, and the flap 41b can be easily opened during heating.

3 (and FIGS. 5(a), 5(c), and 5(f)), when viewed in the vertical direction Y, the overlapping peripheral edge portion 42b is within the formation range R1 of the steam vent hole 42a in the horizontal direction X. (the portion indicated by reference numeral 42b-1 in FIG. 3).
In this configuration, the flap 41b can be pushed up from the back side by the overlapped peripheral edge 42b by utilizing the formation of the film crest 21a, so that the flap 41b can be easily opened during heating.

The formation positions of the flap piece 41b and the vapor release hole 42a in the plane direction of the microwave pouch 10 are as follows.
First, as in the example shown in FIG. 1, the flap piece 41b and the steam vent hole 42a are located at positions near the upper or lower side of the pouch in the vertical direction of the pouch body 20, and in the horizontal direction of the pouch of the pouch body 20. Formed at a position straddling the first imaginary line L1 extending along the vertical direction of the pouch through the center, or at a position near the left or right side of the pouch in the left-right direction of the pouch body 20, and the vertical direction of the pouch of the pouch body 20 It is preferably formed at a position straddling a second imaginary line L2 extending along the lateral direction of the pouch through the center of the direction.
With this configuration, the film crest portion 21a is easily formed on the back side of the flap piece 41b. That is, the peripheral portions of the first virtual line L1 and the second virtual line L2 are regions where the crest portion 21a of the film tends to be bent due to swelling of the pouch body 20 during heating. By forming the punch hole 42a, the film crest portion 21a can be easily formed on the back side of the flap piece 41b.
More specifically, when forming the flap piece 41b at a position straddling the first imaginary line L1, it is preferable to form the flap piece 41b so that the flap base end 41c intersects the first imaginary line L1. More preferably, when the flap piece 41b is formed across the second imaginary line L2, it is more preferable to form the flap piece 41b so that the flap base end 41c intersects the second imaginary line L2.
Further, when forming the flap piece 41b at a position straddling the first imaginary line L1, the vertical direction Y of the flap piece 41b (the direction orthogonal to the horizontal direction X in which the flap proximal end 41c extends) and the vertical direction of the pouch (the first The direction in which the virtual line L1 extends) is preferably aligned (parallel), and when the flap piece 41b is formed at a position straddling the second virtual line L2, the vertical direction of the flap piece 41b Y (the direction orthogonal to the lateral direction X in which the flap proximal end 41c extends) and the pouch lateral direction (the direction in which the second imaginary line L2 extends) are preferably aligned (parallel).
Further, when forming the flap piece 41b at a position straddling the first imaginary line L1, it is preferable to form the overlapping peripheral edge portion 42b at a position straddling the first imaginary line L1. When forming at a position straddling the two virtual lines L2, it is preferable to form the overlapping peripheral edge portion 42b at a position straddling the second virtual line L2.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and the microwave pouch 10 can be manufactured by arbitrarily combining each configuration of the above or the following embodiments and modifications. Various design changes, such as construction, may be made without departing from the invention as set forth in the claims.

For example, specific embodiments of the films 21, 22, 41, and 42 constituting the microwave pouch 10 include synthetic resin films such as polyester, polypropylene, and polyamide, and these synthetic resin films having gas barrier properties and moisture barrier properties. Any film may be used as long as it is formed by laminating a known synthetic resin film such as a coating film or vapor deposition film to which the is imparted, or by laminating paper or aluminum foil on the synthetic resin film.
Moreover, each of the films 21, 22, 41, and 42 constituting the microwave pouch 10 may be formed as a separate film, and at least a part of the film may be integrated (as a continuous film). may be formed.
Further, in the above-described embodiment, the content of the microwave pouch 10 is described as food, but the specific aspect of the content is not limited to food as long as it contains water. .

Further, in the above-described embodiment, the vapor release mechanism 40 is formed in the pouch branching portion 30 of the branched pouch, but the formation position of the vapor release mechanism 40 is not limited to the above. Any position may be used as long as the film 42 and the first film 41 are overlapped.
In the example shown in FIG. 6, which is an example of the modification, the microwave pouch 10 is configured as a standing pouch, and the vapor release mechanism 40 includes a first film 41 and a second film as films constituting the pouch body 20. 42, a steam release seal portion 43 formed by heat-sealing the films 41 and 42, and a steam release portion 44 isolated from the contents accommodating portion 12 by the steam release seal portion 43, formed in the first film 41. It has a flap piece 41 b partitioned by a slit 41 a and a steam release hole 42 a formed in the second film 42 at the steam release portion 44 .

In the examples shown in FIGS. 1 and 6, the microwave pouch 10 is configured as a branched pouch or a standing pouch. As long as it has the first film 41 and the second film 42, for example, a so-called flat pouch or the like may be used.

Further, in the above-described embodiment, the slit 41a that partitions the flap piece 41b has been described as being formed as an incision-shaped slit (without material removal), but the specific aspect of the slit 41a is limited to this. It may also be formed as a (hole-like) slit with a width (with material removal).
In the above-described embodiment, as shown in FIG. 2, the flap free end 41d of the flap piece 41b is closer to the communication start scheduled portion 43a of the steam release seal portion 43, and the flap proximal end 41c is farther. Although the description has been made assuming that the flap piece 41b (slit 41a) is formed in one direction, the specific aspect of the flap piece 41b (slit 41a) is not limited to the above, and may be of any kind. The flap piece 41b (slit 41a) may be formed in such a direction that the flap base end 41c is closer as the tip becomes farther.

Further, in the above-described embodiment, the second film 42 is provided with the overlapping peripheral edge portion 42b, but such an overlapping peripheral edge portion 42b may not be formed.

In the examples shown in FIGS. 1 and 6, the steam release seal portion 43 is formed so as to be continuous with the bag-making seal portion 11. It may be formed independently from the seal portion 11 .

Further, in the example shown in FIG. 1 described above, the scheduled communication start portion 43a is a portion of the steam release seal portion 43 formed so as to protrude toward the content accommodating portion 14 (most in the center of the content accommodating portion 14). In the example shown in FIG. 6 described above, it is assumed that the portion closest to the center of the contents accommodating portion 14 is formed. In addition to the above, a portion of the steam release seal portion 43 designed to start peeling first, such as a position determined by increasing or decreasing the seal strength of each portion of the steam release seal portion 43. If so, it can be of any kind.

In the above-described embodiment, the steam release portion 44 is formed as a region (unsealed portion) where the first film 41 and the second film 42 are not heat-sealed. Formed as a weakly bonded portion in which the films 41 and 42 are thermally bonded more weakly than the punched seal portion 43 (or the bag-making seal portion 11), or as a patterned bonded portion in which the films 41 and 42 are knurled or the like. You may

Further, in the above-described embodiment, the steam release mechanism 40 is heat-sealed at (the communication start scheduled portion 43a thereof) the steam release seal portion 43 by the steam generated in the content accommodating portion 12 during heating by the microwave oven. By separating the films 41 and 42, the content storage portion 12 and the steam release portion 44 are communicated with each other, and the steam in the content storage portion 12 is released to the outside from the steam release portion 44. described as a thing.
However, a specific structure (a specific aspect of the planned communication start portion 43a) for communicating the contents accommodating portion 12 and the steam release portion 44 during heating by the microwave oven is such that heat is It is not limited to the one that separates the welded films 41 and 42, but any device that utilizes the steam generated in the content-accommodating portion 12 to allow the content-accommodating portion 12 and the steam release portion 44 to communicate with each other. Anything is fine.
For example, as shown in FIG. 7, in the steam release seal portion 43, at least one of the first film 41 and the second film 42 is formed with a weakened portion that can be peeled off or destroyed by the steam generated inside the contents-accommodating portion 12. Then, using the weakened portion as the scheduled communication start portion 43a, the weakened portion (scheduled communication start portion 43a) is peeled off or destroyed during heating by the microwave oven to open the content storage portion 12 and the vapor release portion 44. A communicating steam passage P may be formed in at least one of the first film 41 and the second film 42 . The weakened portion forming such a steam passage P may be an interlayer having a weak adhesive force when the films 41 and 42 are formed as a laminated film, or a weakened portion formed to be mechanically weak and likely to break. It is conceivable to use the weakened part or the like.

DESCRIPTION OF SYMBOLS 10... Microwave pouch 11... Bag-making seal part 11a... Top seal part 11b... Side seal part 12... Contents accommodating part 20... Pouch main body 21... Front side Film 21a... Film peak part 22... Back side film 30... Pouch branch part 31... Upper end part of pouch branch part 32... Lower end part of pouch branch part 40... Vapor release mechanism 41 ・... first film 41a ... slit 41b ... flap piece 41c ... flap base end 41d ... flap free end 42 ... second film 42a ... steam vent hole 42b ... overlapping peripheral edge Part 43... Steam release seal part 43a... Communication start scheduled part 44... Steam release part L1... First imaginary line L2... Second imaginary line X... Lateral direction Y... Longitudinal direction

Claims (11)

A pouch for a microwave oven, comprising a steam release portion isolated from a content-accommodating portion by a steam release seal portion, and a steam release mechanism for releasing steam in the content-accommodating portion to the outside from the steam release portion during heating. hand,
The vapor venting mechanism includes a first film and a second film that are arranged in an overlapping manner, the vapor venting seal portion formed by heat-sealing the first film and the second film, and the It has a flap piece partitioned by a slit formed in a first film, and a vapor release hole formed in the second film in the vapor release portion so that at least a part of the flap piece overlaps the flap piece in the front and back direction. A pouch for a microwave oven, characterized in that: 2. The electronic device according to claim 1, wherein the second film has an overlapped peripheral edge portion that overlaps a part of the flap piece in the front and back direction on the peripheral edge portion of the steam vent hole. range pouch. The flap piece has a flap base end extending in the lateral direction and connected to the first film, and a flap free end separated from the flap base end in the longitudinal direction orthogonal to the lateral direction,
3. The overlapping peripheral edge portion is formed so as to overlap in the front-back direction with at least a part of the portion of the flap free end that is the most distant from the flap base end in the longitudinal direction. 2. The microwave pouch according to 2. The steam release seal portion has a communication start scheduled portion that allows communication between the content storage portion and the steam release portion during heating,
4. The pouch for a microwave oven according to claim 3, wherein the flap piece is formed such that the free end of the flap is closer to the expected communication start portion and the proximal end of the flap is farther. . The steam release seal portion has a communication start scheduled portion that allows communication between the content storage portion and the steam release portion during heating,
1. The flap piece has a portion formed closer to the scheduled communication start portion than a portion closest to the scheduled communication start portion of the steam release hole. Item 5. The pouch for a microwave oven according to any one of items 4. The microwave pouch includes a pouch body having the content-accommodating portion, and a pouch branch portion formed by protruding to the front side from a front film constituting the pouch body,
The steam release mechanism is formed in the pouch branch,
6. The pouch branching portion is provided so that the second film having the steam vent holes faces the front side film of the pouch body. Microwave pouch as described. The flap piece has a flap base end extending in the lateral direction and connected to the first film, and a flap free end separated from the flap base end in the longitudinal direction orthogonal to the lateral direction,
7. The pouch for a microwave oven according to claim 6, wherein the steam vent hole is formed so that the width in the horizontal direction is narrower than the vertical width in the vertical direction. 6. When viewed in the vertical direction, the formation range of the steam vent holes in the horizontal direction is set so as to be within the formation range of the flap pieces in the horizontal direction. Item 8. The pouch for microwave oven according to item 7. 9. The pouch for a microwave oven according to claim 8, wherein the lateral width of the flap piece in the lateral direction is set wider than the lateral width of the steam vent hole in the lateral direction. The second film has an overlapping peripheral edge portion arranged to overlap a part of the flap piece in the front and back direction at the peripheral edge portion of the steam vent hole,
10. The apparatus according to any one of claims 6 to 9, wherein when viewed in the longitudinal direction, the overlapping peripheral edge portion has a portion located within a formation range of the steam vent holes in the lateral direction. microwave pouch. The flap piece and the steam vent hole are positioned near the upper or lower side of the pouch body in the vertical direction of the pouch, and extend along the vertical direction of the pouch through the center of the pouch body in the horizontal direction of the pouch. Formed at a position straddling the first imaginary line, or at a position near the left or right side of the pouch body in the left-right direction of the pouch, passing through the center of the pouch body in the up-down direction of the pouch and along the left-right direction of the pouch 11. The pouch for a microwave oven according to any one of claims 6 to 10, wherein the pouch is formed at a position straddling the extending second imaginary line.

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