JP2024027427A - Packaging bags and food packaging - Google Patents

Abstract

An object of the present invention is to provide a packaging bag that has a water vapor release mechanism and has improved restorability. SOLUTION: A packaging bag 10 in which a storage space capable of accommodating contents is formed by joining at least a lower bottom part 10B and both right and left end parts 10C of the facing laminated sheets, wherein the facing laminated sheets A joint forming part 7 whose inner surfaces are removably joined to each other and a sealed space S can be formed on the bottom side of the joining position by the joining, and between the joint forming part 7 and the opening 10A, A water vapor release mechanism part 3 is provided which can discharge water vapor inside the packaging bag 10 to the outside by increasing the pressure inside the packaging bag 10. [Selection diagram] Figure 1

Description

TECHNICAL FIELD The present invention relates to a packaging bag for storing food (contents) that can be heated in a microwave oven and has a steam release mechanism that allows steaming, and a food package using the packaging bag.

In addition, when food is stored in a packaging bag and steamed and heated using a steam release mechanism, the packaging bag must be sealed on three or four sides, including the top, bottom, and left and right ends. It is assumed that

2. Description of the Related Art Conventionally, there has been a food package as an article made by filling and sealing a packaging bag made of a laminated sheet made of a plurality of laminated sheets with cooked food (hereinafter also referred to as contents). Foods accommodated include curries, stews, vegetables, and meat. Hereinafter, the packaging bag will also be simply referred to as a bag.
As a packaging bag that can store food and allow it to be steamed and heated, there is, for example, a bag described in Patent Document 1.

The bag described in Patent Document 1 has a resin-made front film and a back film facing each other, and has a bag shape in which the left and right ends and the lower end (bottom side) are joined, and the contents can be stored through the opening at the upper end. It becomes. In addition, a water vapor release mechanism is formed on the upper side of the bag, and a zipper tape (zipper part) is provided above the water vapor release mechanism so as to extend from the first side to the second side of the bag. (See Section 9 and Figure 11).

By heating such a food package in which food is sealed in a bag in a microwave oven, for example, the food inside is subjected to heat treatment. With this heating, the moisture inside the bag turns into steam and the pressure inside the bag (accommodation space) that contains the food increases.As the pressure rises, the steam is discharged to the outside from the steam release mechanism. Ru. Thereby, it is possible to prevent the bag from bursting due to an increase in pressure, and to obtain a heating and steaming effect of steaming the food.

If the bag has a zipper that can be opened and closed near the top opening, the zipper can be opened before cooking, another food or seasoning material can be added to the bag, and then the zipper can be opened. It is possible to cook with the lid closed.

Further, the bag of Patent Document 1 has a half-cut line on the bottom side of the steam release mechanism, and by tearing the bag along the half-cut line, food can be easily removed from the bag.

JP2019-55785A

However, in the packaging bag described in Patent Document 1, the food contained therein is assumed to be removed by tearing the bag along the half-cut line after heating. Therefore, if some of the food in the bag is left over, the bag cannot be reused, and the leftover food must be transferred to another container and stored or discarded.

The present invention has been made with attention to the above points, and an object of the present invention is to provide a packaging bag that has a water vapor removal mechanism and has improved restorability.

In order to solve the problem, one aspect of the present invention is that at least one of the bottom and the top of the facing laminated sheets is joined to both the left and right ends, thereby forming a storage space that can store and seal the contents. The packaging bag is a packaging bag that allows the contents to be taken in and out of the storage space and the outside through an opening formed on the top side by opening the bag in the lateral direction, and that allows the inner surfaces of the facing laminated sheets to be attached and detached from each other. There is an increase in water vapor pressure generated from the contents stored in the packaging bag due to heating of the packaging bag between the joint forming part that joins and seals the accommodation space by the joining, and the joint forming part and the top part. A water vapor release mechanism section capable of discharging water vapor within the packaging bag to the outside is provided.

The packaging bag according to the aspect of the present invention is, for example, filled with food with the joint forming portion open and then sealed around the entire periphery to become a food package. Then, the food packaging is sold in this state, and the consumer who has purchased the food packaging may, for example, put the food packaging in a microwave oven with the joint formed by the joint forming part released. By heating the food inside, the food inside is heated. During this heating process, when the moisture inside the bag turns into steam and the pressure in the storage space where the food is stored increases, as the pressure rises, steam is released from the steam release mechanism into the bag. It is discharged to the outside. This prevents the bag from bursting and provides a heating and steaming effect for steaming the food.

Note that when a large amount of food is filled in the packaging bag and the packaging bag is sealed, the joint forming portion is initially in an open state. That is, the joint forming portion can be brought into a state that is not completely closed.

After cooking, the food inside the packaging bag is taken out from the bag by opening the opening formed by opening the bag in the lateral direction on the top side. At this time, if uneaten food remains in the bag, the food capacity in the bag is also reduced, so by closing the joint forming part, it is possible to use a packaging bag with a water vapor release mechanism. It is also possible to re-save the data reliably.

As described above, according to the aspects of the present invention, it is possible to provide a packaging bag that has a water vapor removal mechanism and has improved restorability, and a food package using the bag.

FIG. 1 is a front view showing an example of a packaging bag according to an embodiment of the present invention. (a) is a longitudinal cross-sectional view showing an example of a packaging bag according to an embodiment of the present invention, and (b) is a partial cross-sectional view showing an example of a joint forming part. It is a figure which shows the packaging bag (food packaging body in the state which accommodated food) of another example in which the opening of the upper end part was sealed.

Next, embodiments of the present invention will be described with reference to the drawings.
The packaging bag of this embodiment is a packaging bag in which an opening is formed at the upper end by joining the bottom and left and right ends of opposing laminated sheets to form a storage space that can accommodate the contents from above. be.
The packaging bag may have a structure in which a top portion (also referred to as an upper end portion) and both left and right end portions are joined. Moreover, the packaging bag may have a structure in which the top, bottom, and both left and right ends are joined.

Since the packaging bag also serves as a microwave oven container, the laminated sheet is made of a known food packaging material that can be heated in a microwave oven. A laminated sheet is constructed by laminating a plurality of sheet bodies. The laminate sheet is, for example, a laminate formed between a printed base material placed on the outer surface of the bag and an innermost sealant with an intermediate layer interposed therebetween. The sheet body constituting the base material and the intermediate layer is made of, for example, PET, PEN, PP, PA, or the like. The sealant is made of, for example, LDPE, HDMP, PP, or the like.
In addition, as an intermediate layer, polyamide resins such as nylon resin are used to improve strength and durability against retort/boil processing, and aluminum foil, aluminum vapor-deposited film, and transparent materials are used to improve gas barrier properties to prevent penetration of oxygen, water vapor, etc. As a deposited film, metal oxides such as aluminum oxide, silicon oxide, magnesium oxide, calcium oxide, zirconium oxide, titanium oxide, boron oxide, hafnium oxide, barium oxide, and silicon oxide, as well as plate-shaped minerals and/or barrier properties. The barrier layer may be formed by one or more coating films of barrier coating agents containing resin.

For example, as shown in FIGS. 1 and 2, the bag 10 of this embodiment is constructed by joining two laminated sheets facing each other in the thickness direction and sealing the lower bottom 10B and both left and right ends 10C. Shape the bag as described above. Alternatively, the bag 10 can be formed into the bag shape by, for example, folding a laminated sheet to seal the bottom side at the folded portion, and sealing and joining both left and right end portions 10C.
Here, the facing laminated sheets are also referred to as the front part 1 and the back part 2.

Furthermore, the packaging bag 10 of this embodiment includes a joint forming part 7, a water vapor release mechanism part 3, and a half-cut line 4, as shown in FIGS. 1 and 2.

<Joint forming part 7>
The joint forming portion 7 has a structure in which the inner surfaces of the facing laminated sheets 1 and 2 are removably joined to each other, and by the joining, a sealed space S can be formed on the bottom side of the joining position. The joint forming part 7 is made of a chuck structure extending in the width direction as shown in FIG. 2, for example, and has a joint structure that can be opened and closed multiple times, that is, can be attached and detached. The chuck structure shown in FIG. 2 consists of a protruding strip 7A and a grooved strip 7B that face each other in a pair. Extends to connect parts. Then, the convex portion 7A and the concave portion 7B are fitted to form a joint (closed state), and by pulling the front part 1 and the back part 2 in the direction of separating them, the fitted state (joined state) is released. and becomes non-bonded (open state).

Note that the joint forming part 7 is not limited to the above-mentioned structure, and may have other known structures as long as it has a structure that can form a sealed space S below and can be opened and closed multiple times.

<Water vapor release mechanism section 3>
The steam release mechanism section 3 is formed in the area between the joint forming section 7 and the upper end opening 10A constituting the top, and can be opened by an increase in pressure inside the packaging bag 10 to discharge the steam inside the packaging bag 10 to the outside. It has a structure.
The structure of the steam venting mechanism of the steam venting mechanism section 3 is, for example, formed to have a weaker sealing strength than the normal sealing strength of the sealant layer between the laminated sheets 1 and 2. Furthermore, even if the sealing strength is the same, the sealing area is made smaller (narrower in width) at the portion where the steam pressure is applied, or the shape of that portion is formed so that the sealing area becomes smaller. Furthermore, it is configured by a combination of these configurations. Specifically, the water vapor release mechanism reduces the size of the sealed portion by, for example, providing weak sealing strength portions at both the left and right ends of the packaging bag, or the joint portion (sealed portion) at the top, or by providing an unsealed portion. (the area becomes smaller), the seal part faces inside the packaging bag, making a horizontal V-shape (the convex side faces inside the packaging bag), the shape of the joint (seal part) is shaped like the upper side of the convex part, etc. Form. Alternatively, a structure may be adopted in which a steam vent hole (opening) is provided in a non-bonded part (non-sealed part) of the laminated sheet instead of a joined part (sealed part), and the periphery is surrounded by a joined part (sealed part). The structure of the water vapor removal mechanism is not limited to this, and a known mechanism may be adopted.

For example, when sealing and joining the width direction ends 10C of the front part 1 and the back part 2, the water vapor releasing mechanism part 3 of this embodiment peels off the part that will become the water vapor releasing mechanism part 3 using internal pressure. Configured as a possible weak seal. There may be two or more water vapor removal mechanisms 3.
Further, the shape of the hole constituting the water vapor removal mechanism section 3 when opened is, for example, circular in cross section, substantially square, semicircular, slit, or the like.

<Half cut line 4>
The half-cut line 4 is formed as a transverse half-cut line structure between the joint forming part 7 and the steam venting mechanism part 3, so that the laminated sheet can be separated by tearing, for example. Although the half-cut line may be formed between the top of the bag and the steam venting mechanism section 3, it is preferable to form it between the joint forming section 7 and the steam venting mechanism section 3.
As shown in FIGS. 1 and 2, the half-cut line 4 of this embodiment cuts the front part 1 and the back part 2 on the left and right sides in the width direction in an area above the joint forming part 7 and below the steam venting mechanism part 3. It extends to connect the ends.

Although the half-cut line 4 shown in FIG. 1 extends linearly in the width direction, it may also extend in a curved line. For example, the half-cut line 4 shown in FIG. It may be in the form of If the half-cut line 4 formed on the front part 1 and the half-cut line 4 formed on the back part 2 are at the same height position at the end in the width direction, the position of each line can be designed individually. Good too.
Here, the half-cut line 4 is an easy-to-open line, and may have a known structure.

In addition, instead of the half-cut line 4, or together with the half-cut line 4, a notch or the like is formed at a position above the joint forming part 7 and below the steam venting mechanism part 3 at the width direction end part to facilitate cutting. You may also provide a part that will serve as a trigger.
Here, an opening is formed by opening in the lateral direction using a half-cut line 4, a notch, or the like.

(Modified example)
As shown in FIG. 3, the lower ends of the front part 1 and the back part 2, which are facing laminated sheets, are connected (joined) through a bottom sheet 6 that is mountain-folded toward the sealed space S side (standing pouch). It may be .
In this case, the packaging bag 10 is placed in an upright state with the opening 10A side facing upward by expanding the bottom part 10B in the direction of separating the lower ends of the front part 1 and the back part 2 as shown in FIG. can be placed.
Note that reference numeral 10 in FIG. 3 is an example of a food package using the packaging bag 10 of the present disclosure, and a food product (not shown) is housed inside.

As shown in FIG. 3, with the food stored inside the bag 10, the top portion 5 consisting of the upper end opening is sealed.
In addition, once the bag is opened on the top side, the contents such as food in the lower sealed space S can be taken out by opening and closing the storage space, that is, the joint forming part 7, and it can be resealed with the remaining contents. Therefore, it can be stored in a food package. In addition, by putting other foods and seasonings into the sealed space S and resealing them, it becomes possible to heat them in a microwave oven. Preservation is possible by resealing.
Moreover, after the bag is once opened on the top side, the joint forming part 7 becomes capable of later inserting another food or seasoning into the bag 10.

(Other operations)
In the packaging bag 10 of this embodiment, for example, after opening the joint forming part 7 and storing (filling) the food to be heated through the upper end opening 10A, the packaging bag 10 can be opened with the upper end opening 10A sealed. By heating in a microwave oven, the food inside the bag 10 is heat-treated. During this heating, when the moisture in the bag 10 turns into steam and the pressure in the storage space where the food is stored increases due to the heating, steam is released from the steam venting mechanism 3 as the pressure increases. It is discharged to the outside of the bag 10. This prevents the bag 10 from bursting and provides a heating and steaming effect for steaming the food.

Note that when a large amount of food is filled into the packaging bag 10 and the packaging bag 10 is sealed, the joint forming portion 7 remains open. That is, the joint forming portion 7 can be brought into a state that is not completely closed.

After the above heating and cooking, the food inside the packaging bag 10 can be taken out from the bag 10 by unsealing the upper end opening 10A.

At this time, instead of unsealing the upper end opening 10A, the bag 10 is cut at the half-cut line 4 by holding the lower part of the bag 10 and pulling the upper end of the bag 10 sideways by hand. Then, the upper part of the bag 10 is removed and the food inside the packaging bag 10 is taken out from the bag 10. In this case, the ease of taking out the contents can be improved.

Here, if the amount of food in the bag 10 is large, it is assumed that the food may not be eaten all the time. When it is desired to leave such uneaten food in the bag 10, the food capacity in the bag 10 is also reduced, so by closing the joint forming part 7, the water vapor venting mechanism part is closed. Since a sealed state can be formed at a position below 3, even if the packaging bag 10 has the water vapor removal mechanism 3, it can be restored while reliably maintaining its sealing performance.

As described above, according to the present embodiment, it is possible to provide a packaging bag 10 that has a water vapor removal mechanism and has improved restorability, and a food package using the bag 10.

(others)
The present disclosure can also take the following configuration.
(1) A packaging bag in which at least one of the bottom and top of the facing laminated sheets and both left and right ends are joined to form a storage space that can contain and seal the contents,
Enables the contents to be taken in and out of the storage space from the outside through an opening formed by opening the package in a lateral direction to the top side;
a joint forming part that removably joins the inner surfaces of the facing laminated sheets and seals the accommodation space by the joining;
a water vapor venting mechanism part, located between the joint forming part and the top part, capable of discharging water vapor inside the packaging bag to the outside by increasing the water vapor pressure generated from the contents stored in the packaging bag by heating the packaging bag;
A packaging bag characterized by comprising:
(2) The bottom portions of the facing laminated sheets are joined to the sealed space side via a mountain-folded bottom sheet, and the bottom portions are expanded in a direction that separates the lower ends of the facing laminated sheets. , the packaging bag can be placed in an upright position with the top side facing up.
(3) A transverse half-cut line is provided between the top portion and the joint forming portion to allow separation of the laminated sheet.
(4) The half-cut line is formed on the back surface of the laminated sheet so as to overlap at least partially with the first half-cut line formed on the front surface of the laminated sheet and the first half-cut line in the lamination direction. and a second half-cut line.
(5) The packaging bag of the present disclosure;
The above-mentioned contents consisting of food contained in the above-mentioned packaging bag;
A food packaging body comprising:

1 Front part (laminated sheet)
2 Back part (laminated sheet)
3 Steam venting mechanism part 4 Half cut line 5 Top part 6 Bottom sheet (laminated sheet)
7 Joint forming part 7A Convex part 7B Concave part 10 Packaging bag 10A Opening part 10B Bottom part 10C Width direction end part

Claims (5)

A packaging bag in which at least one of the bottom and the top of opposing laminated sheets and both left and right ends are joined to form a storage space that can accommodate and seal the contents,
Enables the contents to be taken in and out of the storage space from the outside through an opening formed by opening the package in a lateral direction to the top side;
a joint forming part that removably joins the inner surfaces of the facing laminated sheets and seals the accommodation space by the joining;
a water vapor venting mechanism part, located between the joint forming part and the top part, capable of discharging water vapor inside the packaging bag to the outside by increasing the water vapor pressure generated from the contents stored in the packaging bag by heating the packaging bag;
A packaging bag characterized by comprising: The bottoms of the facing laminated sheets are joined to the sealed space side through a mountain-folded bottom sheet, and by expanding the bottoms in a direction that separates the lower ends of the facing laminated sheets, the packaging bag can be placed in an upright position with the top side facing up,
The packaging bag according to claim 1, characterized in that: A lateral half-cut line is provided between the top portion and the joint forming portion, allowing the laminated sheet to be separated.
The packaging bag according to claim 1, characterized in that: The half-cut line includes a first half-cut line formed on the front side of the laminated sheet, and a first half-cut line formed on the back side of the laminated sheet so as to overlap at least partially with the first half-cut line in the lamination direction. 2 half-cut lines,
The packaging bag according to claim 3, characterized in that: The packaging bag according to any one of claims 1 to 4,
The above-mentioned contents consisting of food contained in the above-mentioned packaging bag;
A food packaging body comprising:

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