JP2020083438A - Food storage bag - Google Patents

Abstract

To provide a practical food storage bag that can provide good freshness maintaining effect on stored food with a simple structure, and can heat the food softly to impart good mouthfeel in cooking in a microwave oven.SOLUTION: A food storage bag 1 is a two-way bag in a rectangular shape in front view which is formed of an OPP film, and has both right and left edges heat-sealed. Then a semicircular cut 2 is formed at a folding edge of a bottom part, two fan-shaped heat seal parts 3, 3 are provided at a circumference of the cut 2, and a non-seal part 4 having a certain width is formed therebetween. Further, an internal pressure control seal part 5 in a wide rectangular shape is provided on the inside at a predetermined distance away from the two fan-shaped heat seal parts 3, 3 in parallel with the folding edge to cover the non-seal part 4.SELECTED DRAWING: Figure 2

Description

The present invention relates to a food storage bag having a function of suppressing physiological respiration of stored fruits and vegetables, fermented foods and the like to maintain freshness during distribution and storage, and a function of being able to be heated and cooked by being put directly into a microwave oven. It is a thing.

As a bag made of synthetic resin for storing food, a notch is formed in at least one place of a bag-shaped body made of a synthetic resin film, and the periphery of the notch is heat-sealed together with the notch periphery. By designing the peel strength of the heat-sealed part of the product to be lower than the tear strength and peel-resistant strength of other parts, the heat-sealed part around the notch peels off when the internal pressure rises during heating by a microwave oven. There is known a structure in which a notch is opened so that steam is allowed to escape from the opened notch (Patent Document 1).

JP, 2004-306984, A

However, in order to develop a good freshness-retaining effect of the food stored in the food storage bag as described in Patent Document 1, a structure for allowing gas to pass (such as fine holes) is provided separately from the notch. Since it has to be provided, it is difficult to manufacture at low cost. Also, when the internal pressure rises during heating by a microwave oven, the heat-sealed part around the notch peels off more than necessary, and after that, the internal pressure cannot be raised to the level required for cooking, and food Occasionally, it may not be possible to fully heat the material so that it feels good to the touch.

The object of the present invention is to solve the problems of the conventional food storage bag, and to exhibit a good freshness-retaining effect of the food stored by a simple structure, and when cooking in a microwave oven, An object of the present invention is to provide a practical food storage bag capable of keeping the internal pressure at a constant level and heating the food fluffy so that the food has a good texture.

The invention according to claim 1 is formed in a bag shape having an opening capable of being sealed by a synthetic resin film or an opening capable of repeating sealing and opening, and has a notch at least at one position near an edge. It is a food storage bag that is formed, and the circumference of the cutout is heat-sealed, and when the internal pressure is increased in a sealed state, the heat seal around the cutout separates and the cutout opens. In addition, a part of the periphery of the notch is non-sealed, and the inner pressure control seal part having a width equal to or larger than the width of the non-seal part covers the non-seal part inside the non-seal part. It is characterized in that the distance between the internal pressure control seal portion and the heat seal portion around the cutout is 0.1 mm or more and 30 mm or less.

According to a second aspect of the present invention, in the first aspect of the present invention, the notch has a semicircular shape, and the internal pressure control seal portion has a wide rectangular shape. It is characterized in that it is provided so as to be orthogonal to the radial direction of.

The food storage bag according to claim 1 has an excellent freshness-retaining effect because gas can appropriately permeate between the non-sealing portion around the notch and the internal pressure control sealing portion. Further, the food storage bag according to claim 1, when the food is stored in a microwave oven and heated in a microwave oven, moderately retains water vapor saturated between the non-sealing portion around the notch and the internal pressure control sealing portion. Since the internal pressure can be maintained at a constant level after being discharged to the inside, it is possible to warm the stored food softly without bursting.

The food storage bag according to claim 2, wherein the size of the notch, the width of the non-sealing portion or the internal pressure control sealing portion, and the like are changed so that the space between the non-sealing portion around the notch and the internal pressure control sealing portion is changed. Since the amount of gas (oxygen, carbon dioxide, water vapor) that permeates through the container can be finely adjusted, product design according to the food to be stored is easy.

It is explanatory drawing which shows the installation part of the internal pressure control sealing part of a food storage bag. It is explanatory drawing which shows the food storage bag manufactured in the Example.

The food storage bag according to the present invention needs to be formed in a bag shape having an opening capable of being sealed by a synthetic resin film or an opening capable of repeating sealing and opening. As the synthetic resin film for forming the storage bag according to the present invention, a polyolefin film, a general-purpose synthetic resin film capable of heat-sealing or fusion-sealing such as polyester film can be preferably used, among them, It is preferable to use a biaxially oriented polypropylene film, a polyethylene terephthalate film, or a polylactic acid film, because the storage bag has high transparency and the inside of the bag can be easily seen when storing fruits and vegetables.

Further, the synthetic resin film may be composed of a single layer or may have a multi-layer structure in which a heat-sealing layer or the like is laminated on the base material layer. It is preferable to use a laminated film formed by laminating melt-extruded polyethylene as a heat-sealing layer on an axially stretched polyethylene terephthalate film because it has high strength and is difficult to tear and a highly transparent food storage bag can be obtained. ..

The thickness of the synthetic resin film that is the forming material is not particularly limited, but is preferably in the range of 5 to 75 μm, and more preferably in the range of 20 to 50 μm. When the thickness of the synthetic resin film is less than 5 μm, the film “looseness” disappears and it becomes difficult to open the bag when storing fruits and vegetables, so it takes time to store it and the volume of the product after storage is large. It is not preferable because it will lose the feeling. On the other hand, if the thickness of the synthetic resin film exceeds 75 μm, the rigidity of the film becomes too high, and it becomes difficult to store fruits and vegetables, and it becomes difficult to carry out the sealing work after storage, which is not preferable.

Further, the storage bag according to the present invention, various fruits and vegetables (especially, green soybeans, potatoes, shiitake mushrooms and broccoli when the bag is overhumid, mold easily grows, breathing is intense and discoloration occurs. Although it is easy to store), it is preferable that the inner surface of the storage bag has anti-fogging property in order to maintain good freshness. The method of imparting anti-fogging property is not particularly limited, it may be preliminarily contained an anti-fog agent in the synthetic resin raw material forming the storage bag, on the film surface to be the inner surface of the storage bag, You may coat an antifog agent. As the antifogging agent, it is preferable to use an antifogging agent that can exhibit antistatic properties as well as antifogging properties.

Such antifogging agents include nonionics such as fatty acid esters of polyhydric alcohols, amines of higher fatty acids, amides of higher fatty acids, sucrose fatty acid esters, and amine oxides of higher fatty acids and ethylene oxide adducts of amides. Mention may be made of the surfactants of the system. Further, among these antifogging agents, it is more preferable to use polyoxyethylene alkylamine type, polyoxyethylene alkylamine fatty acid ester type, and fatty acid glycerin ester type ones in combination. It is also possible to use a water-soluble resin such as polyvinyl alcohol as a coating agent.

In addition, the resin forming the synthetic resin film, if necessary, within the range that does not impair the characteristics of each layer, heat stabilizer, antioxidant, light stabilizer, lubricant, nucleating agent, flame retardant, pigment, dye, Calcium carbonate, barium sulfate, magnesium hydroxide, mica, talc, clay, zinc oxide, magnesium oxide, aluminum oxide, an antibacterial agent, an additive imparting spontaneous degradability, and the like can be added. Further, thermoplastic resins, thermoplastic elastomers, rubbers, hydrocarbon resins, petroleum resins, etc. may be blended within a range that does not impair the characteristics of the synthetic resin film, for controlling the state of water in the fruits and vegetables to be stored. A special treatment may be applied to the synthetic resin film.

The food storage bag according to the present invention can be formed by stacking two sheets of the above synthetic resin film and heat-sealing the periphery. The shape of the food storage bag is not limited to the two-sided bag and the three-sided bag, and various shapes such as a retort pouch can be used. Further, the food storage bag may have an opening that can be simply sealed by heat sealing or the like, or may have an opening that can be repeatedly sealed and opened by a chuck, a zipper, or the like. Further, as the chuck and the zipper, various commercially available ones such as a type in which a belt-shaped concave portion is fitted in a belt-shaped concave portion are preferably used, which are formed of a synthetic resin such as polyethylene or polypropylene.

Further, the food storage bag according to the present invention needs to have a notch formed at least at one position near the edge. The cutout functions as a discharge hole for discharging saturated steam when the food is stored in the food storage bag and heated. The shape of the cutout is not particularly limited, and may be circular, elliptical, semicircular, rectangular, or the like. The position of the cutout is not particularly limited, but it is preferable that the cutout is located at the front, rear, or left and right edges so that the heat-sealed portion around the cutout does not inadvertently peel off when the food is stored. Further, the number of notches is not limited to one, and it is possible to provide two or more. Furthermore, it is preferable that even numbers (2, 4, 6, etc.) of the cutouts are provided symmetrically because heating unevenness in the stored food is reduced when the cutouts are heated in a range.

Furthermore, the food storage bag according to the present invention is such that a part of the periphery of the above-mentioned cutout is made non-sealed, and a heat-sealed portion around the cutout is provided inside the non-sealed portion (center side of the bag). It is necessary to provide an internal pressure control seal part (heat seal part) having a width equal to or larger than the width of the non-seal part so as to cover the non-seal part at a predetermined distance from. By installing the internal pressure control seal portion in such a specific manner, the food storage bag according to the present invention, when storing food such as fruits and vegetables, has a high freshness-retaining effect and is heated in a microwave oven. In addition, by letting the expanded air (water vapor) escape to the outside from the gap between the non-sealing portion around the notch and the internal pressure control sealing portion, it becomes possible to appropriately suppress the increase in the internal pressure.

FIG. 1 shows an example of an installation mode of a heat seal part, a non-seal part, and an internal pressure control seal part around the notch. The shape of the heat seal around the notch is not particularly limited, but the notch In the case of a semicircular shape, it is preferably a concentric fan shape (a shape forming a part of a donut shape) adjacent to the cutout. Also, the method of heat-sealing the periphery of the notch is not particularly limited, but when the periphery (outer periphery) of the food storage bag is heat-sealed (fusing seal etc.), when heating the food storage bag in a microwave oven. In addition, since the heat seal portion around the notch needs to be peeled off preferentially, it is necessary that the heat seal strength is lower than that of the outer heat seal portion. As a method of lowering the heat-sealing strength of the heat-sealing portion around the notch as compared with the heat-sealing strength of the outer peripheral heat-sealing portion, various methods can be adopted. A method of reducing the width, a method of reducing the width of the heat-sealed portion, and the like can be preferably used.

Further, the non-sealing portion provided around the notch needs to be provided so as to cross (separate) the heat-sealing portion around the notch and to communicate the notch and the inside of the bag, but the shape is It is not particularly limited. As shown in FIGS. 1A to 1C, fan-shaped heat-sealing portions 3 and 3 are provided around the cutout 2 and the fan-shaped heat-sealing portions 3 and 3. When a non-heat seal portion 4 having a constant width whose center is aligned with the center of the cutout is provided so as to cross the cross section 3, the amount of gas passing through the cutout 2 can be controlled when the internal pressure control seal section 5 is provided. It is preferable because it becomes easy.

The preferable width of the non-sealing portion is slightly changed depending on the distance between the heat sealing portion around the notch and the internal pressure control sealing portion, but is preferably 1 mm or more and 20 mm or less, and more preferably 2 mm or more and 15 mm or less. It is particularly preferable that it is 4 mm or more and 10 mm or less. If the width of the non-sealed part is less than 1 mm, the permeation amount of gas inside and outside through the notch becomes too small, and the effect of keeping the freshness of foods such as fruits and vegetables is reduced, and the internal pressure of the microwave when heated is reduced. Since it is not possible to suppress the rise, it is not preferable. On the contrary, when the width of the non-sealing portion exceeds 20 mm, the permeation amount of the gas inside and outside through the notch becomes too large, so that the foods such as fruits and vegetables can be prevented This is not preferable because the freshness-retaining effect is reduced and the internal pressure cannot be sufficiently increased when heating in a microwave oven.

Further, in the food storage bag of the present invention, an internal pressure control seal portion having a width equal to or larger than the width of the non-seal portion is provided so as to cover the non-seal portion by separating the heat seal portion around the notch by a predetermined distance. There is a need. The internal pressure control seal part needs to have a width equal to or larger than the width of the non-seal part, but the shape thereof is not particularly limited, and is rectangular (straight line having a predetermined thickness) or fan-shaped (donut-shaped). Various shapes such as a shape that forms a part of the shape, an arc shape having a predetermined thickness, and the like.

When the cutout is a semicircle, the internal pressure control seal portion is a wide rectangular shape and is positioned so as to be orthogonal to the radial direction of the cutout and passes through the cutout. This is preferable because it facilitates the control of the gas passage amount. In addition, when the internal pressure control seal portion has a horizontally long rectangular shape (a straight line having a constant thickness), it is provided in parallel with the edge of the opening as shown in FIGS. 1(a) and 1(c). It is also possible to provide cutouts on the left and right edges of the food packaging bag, as shown in FIG.

In addition, the distance between the heat seal part around the notch and the internal pressure control seal part needs to be 0.1 mm or more and 30 mm or less. If the distance between the heat seal part around the notch and the internal pressure control seal part is less than 0.1 mm, the permeation amount of the gas inside and outside through the notch becomes too small and the freshness preservation effect of foods such as fruits and vegetables decreases. Or, when heating in a microwave oven, it is not possible to suppress the rise in internal pressure, which is not preferable, and conversely, the distance between the heat seal part around the notch and the internal pressure control seal part is 30 mm. If it exceeds, the permeation amount of gas inside and outside through the notch becomes too large, the effect of maintaining freshness of foods such as fruits and vegetables decreases, and it becomes impossible to sufficiently raise the internal pressure when heating in a microwave oven. Therefore, it is not preferable. The distance between the heat seal part around the notch and the internal pressure control seal part is more preferably 2 mm or more and 20 mm or less, and particularly preferably 4 mm or more and 10 mm or less.

Hereinafter, the food storage bag according to the present invention will be described in more detail with reference to Examples, but the food storage bag of the present invention is not limited to the mode of the Examples, and does not depart from the gist of the present invention. Therefore, it can be changed appropriately. Further, the evaluation methods of physical properties and characteristics in Examples and Comparative Examples are as follows.

<Freshness retention effect (Shiitake mushroom)>
About 200 g of shiitake was stored in a storage bag made of the synthetic resin films of Examples and Comparative Examples (two-side sealed bag having a bag size of height (length in the depth direction of the bag)×width=350 mm×180 mm). .. Then, after leaving the storage bag storing the shiitake mushrooms in an atmosphere of 8° C.×30% RH for 35 days (840 hours), the state of the stored shiitake mushrooms is determined from the viewpoint of taste, shrinkage and mold. From the following, sensory evaluation was performed according to the following 5 grades.
⊚: No difference in taste, wilting, and generation of mold from those before storage.
◯: Although it looks a little dry, there is no difference in taste from that before storage and no mold is observed.
Δ: A slight carbonic acid sensation was felt, some wilting was observed, and slight mold formation was also observed.
Poor: A taste of carbonic acid stimulation was felt, shrinkage was clearly observed, and mold development was also observed.
XX: Withering and severe mold generation (taste cannot be detected).

<Cooking characteristics of food by microwave oven>
A food packaging bag containing 100 g of potatoes and cooled is heated and cooked in a microwave oven under two types of conditions (500 W x 5 minutes, 800 W x 4 minutes 30 seconds), and the state of the cooked potatoes is textured and visually observed. The sensory evaluation was performed according to the following three grades.
Good: The product was sufficiently heated and had an appropriate texture.
Insufficient heating: Not sufficiently heated and still hard.
Too boiled: It was overheated and became too soft.

[Example 1]
Using a high-speed side-weld automatic bag-making machine HK65V manufactured by Totani Giken Co., Ltd., a long biaxially stretched polyolefin film (OPP film Toyobo Co., Ltd. P5562) having a thickness of 20 μm in which an antifogging agent is kneaded is used. After being continuously folded in half along the direction, a sealing zipper was continuously heat-sealed at the open edge. Then, the long OPP film, which is folded in two and heat-sealed with a zipper at the open edge, is fused (heat-sealed and cut) at predetermined intervals under the following conditions (that is, By cutting after heat-sealing, a two-sided bag with zipper having a predetermined size (width 150 mm×height 250 mm) (a half-folded OPP film was heat-sealed on both sides) was produced.
<Fusing conditions>
・Temperature of cutting edge: 420℃
-Blade angle: 120°
・Fusing rate: 120 pieces/minute (time per shot: 0.4 seconds)

Then, heat sealing was performed at a temperature of about 140° C. so as to form a semi-circular shape having a diameter of about 16 mm at the folded edge of the bottom of the two-sided bag. In the heat sealing, a non-sealing portion having a width of 6.0 mm was formed at the center of the semicircular portion so as to be orthogonal to the folded edge. That is, heat-sealing was performed so that the two fan shapes were line-symmetrically adjacent to each other with an interval of 6.0 mm. Further, as described above, at the same time as forming the semicircular heat seal portion having the non-sheet portion, it becomes a horizontally long rectangular shape having a constant height at a position about 5.0 mm away from the heat seal portion. Thus, heat sealing was performed at a temperature of about 140°C. Then, a semi-circular hole having a diameter of about 8 mm is formed in the center of the semi-circular heat seal portion having the non-sheet portion so that the center thereof overlaps with the center of the semi-circular heat seal portion. The food storage bag of Example 1 was obtained.

FIG. 2 shows the food storage bag of the first embodiment. The food storage bag 1 is a two-sided bag formed of an OPP film and having a rectangular shape in a front view, and both left and right edges thereof are heat-sealed. A zipper 6 that can be sealed and opened is provided near the upper opening. A semicircular cutout 2 having a diameter of about 8 mm is provided near the folding edge of the bottom portion, and a fan shape (outer diameter=16 mmφ, inner diameter=8 mmφ (a part of a donut shape) is provided around the cutout 2). Two heat-sealing portions 3 and 3 each having a shape of (1) are formed, and a non-sealing portion 4 having a width of 6.0 mm is formed between them. Further, a rectangular internal pressure control seal portion 5 having a height of 5 mm and a width of 12 mm is provided inside the fan-shaped heat seal portions 3 and 3 by about 5.0 mm in parallel with the folding edge. , The non-sealing portion 4 is covered (in FIG. 2, the width of the internal pressure control sealing portion 5 is shown as W, and the two fan-shaped heat sealing portions 3 and 3 and the internal pressure control seal). The distance to part 5 is shown as D). Further, the left and right edges of the internal pressure control seal portion 5 are in a state of protruding outward from the left and right ends of the non-sealing portion 4 by the same length (3.0 mm).

Then, using the food storage bag obtained as described above, the effect of maintaining freshness against shiitake mushrooms and the cooking characteristics of potatoes in a microwave oven were evaluated by the methods described above. The evaluation results are shown in Table 1 together with the properties of the food storage bag.

[Example 2]
A notch is provided near the folding edge of the bottom of the two-sided bag, and two fan-shaped heat seal parts, a non-sealing part, and an internal pressure control seal part are formed around the notch when the fan-shaped two The distance (D) between the heat seal part and the internal pressure control seal part was changed to 1.0 mm. Then, except for the above, the food storage bag of Example 2 was produced in the same manner as in Example 1, and the freshness retention effect and cooking characteristics were evaluated by the same method as in Example 1. The evaluation results are shown in Table 1 together with the properties of the food storage bag.

[Example 3]
A notch is provided near the folding edge of the bottom of the two-sided bag, and two fan-shaped heat seal parts, a non-sealing part, and an internal pressure control seal part are formed around the notch when the fan-shaped two The distance (D) between the heat seal part and the internal pressure control seal part was changed to 15.0 mm. Then, the food storage bag of Example 3 was produced in the same manner as in Example 1 except for the above, and the freshness retention effect and cooking characteristics were evaluated by the same method as in Example 1. The evaluation results are shown in Table 1 together with the properties of the food storage bag.

[Example 4]
When a cutout is provided at the bottom end of the two-sided bag at the folding edge, and two fan-shaped heat seal parts, a non-seal part, and an internal pressure control seal part are formed around the cutout, the internal pressure control seal part is formed. Width (W) was changed to 7.0 mm. Then, the food storage bag of Example 4 was produced in the same manner as in Example 1 except for the above, and the freshness retention effect and cooking characteristics were evaluated by the same method as in Example 1. The evaluation results are shown in Table 1 together with the properties of the food storage bag.

[Example 5]
A notch is provided near the folding edge of the bottom of the two-sided bag, and two fan-shaped heat seal parts, a non-sealing part, and an internal pressure control seal part are formed around the notch when the fan-shaped two The distance (D) between the heat seal part and the internal pressure control seal part was changed to 0.1 mm. Then, the food storage bag of Example 5 was produced in the same manner as in Example 1 except for the above, and the freshness retention effect and cooking characteristics were evaluated by the same method as in Example 1. The evaluation results are shown in Table 1 together with the properties of the food storage bag.

[Example 6]
A notch is provided near the folding edge of the bottom of the two-sided bag, and two fan-shaped heat seal parts, a non-sealing part, and an internal pressure control seal part are formed around the notch when the fan-shaped two The distance (D) between the heat seal part and the internal pressure control seal part was changed to 25.0 mm. Then, except for the above, the food storage bag of Example 6 was produced in the same manner as in Example 1, and the freshness retention effect and cooking characteristics were evaluated by the same method as in Example 1. The evaluation results are shown in Table 1 together with the properties of the food storage bag.

[Comparative Example 1]
A notch similar to that of Example 1 is provided near the folding edge of the bottom of the two-sided bag (bag body) obtained in the same manner as Example 1, and the same notch as in Example 1 is provided around the notch. Only the heat-sealed part and the non-sealed part were formed, and the internal pressure control sealed part was not formed. Then, using the two-sided bag, the freshness-retaining effect and cooking characteristics were evaluated by the same method as in Example 1. The evaluation results are shown in Table 1 together with the properties of the food storage bag.

[Comparative example 2]
When a cutout is provided at the bottom end of the two-sided bag at the folding edge, and two fan-shaped heat seal parts, a non-seal part, and an internal pressure control seal part are formed around the cutout, the internal pressure control seal part is formed. Width (W) was changed to 3.0 mm. Then, except for the above, a food storage bag of Comparative Example 2 was produced in the same manner as in Example 1, and the freshness retention effect and cooking characteristics were evaluated by the same method as in Example 1. The evaluation results are shown in Table 1 together with the properties of the food storage bag.

[Comparative Example 3]
A notch is provided near the folding edge of the bottom of the two-sided bag, and two fan-shaped heat seal parts, a non-sealing part, and an internal pressure control seal part are formed around the notch when the fan-shaped two The distance (D) between the heat seal part and the internal pressure control seal part was changed to 0.05 mm. Then, except for the above, a food storage bag of Comparative Example 3 was produced in the same manner as in Example 1, and the freshness retention effect and cooking characteristics were evaluated by the same method as in Example 1. The evaluation results are shown in Table 1 together with the properties of the food storage bag.

[Comparative Example 4]
A notch is provided near the folding edge of the bottom of the two-sided bag, and two fan-shaped heat seal parts, a non-sealing part, and an internal pressure control seal part are formed around the notch when the fan-shaped two The distance (D) between the heat seal part and the internal pressure control seal part was changed to 35.0 mm. Then, except for the above, a food storage bag of Comparative Example 4 was produced in the same manner as in Example 1, and the freshness retention effect and cooking characteristics were evaluated by the same method as in Example 1. The evaluation results are shown in Table 1 together with the properties of the food storage bag.

It can be seen from Table 1 that the food storage bags of Examples 1 to 4 are good in both the freshness-retaining effect on shiitake mushrooms and the cooking characteristics of potatoes in a microwave oven. On the other hand, the food storage bag of Comparative Example 1 in which the internal pressure control seal portion is not provided, the food storage bag of Comparative Example 2 in which the width of the internal pressure control seal portion is smaller than the width of the non-sealed portion around the cutout, and heat. The food storage bag of Comparative Example 3 in which the distance (D) between the seal portion and the internal pressure control seal portion is extremely short, and the food storage bag of Comparative Example 4 in which the distance (D) between the heat seal portion and the internal pressure control seal portion is extremely long are It can be seen that in both cases, both the freshness-retaining effect and cooking characteristics are poor.

Since the food storage bag of the present invention has excellent effects as described above, it can be suitably used as a food storage bag that can be heated in a microwave oven as it is after the food is stored, refrigerated and frozen. .

1... Food storage bag 2... Notch 3... Heat seal part around the notch 4... Unsealed part 5... Internal pressure control seal part 6... Zipper

Claims (2)

A synthetic resin film is formed into a bag having an opening that can be sealed or an opening that can be repeatedly sealed and opened, and a cutout is formed in at least one position near the edge, and the cutout is formed. The periphery of the notch is heat-sealed, and when the internal pressure is increased in a sealed state, the heat-seal around the notch is separated and the notch is opened, which is a food storage bag.
A part of the periphery of the notch is unsealed, and an inner pressure control seal part having a width equal to or larger than the width of the unsealed part is provided inside the unsealed part so as to cover the unsealed part. And
A food storage bag, wherein the distance between the internal pressure control seal portion and the heat seal portion around the cutout is 0.1 mm or more and 30 mm or less. The cutout is a semicircular shape, the internal pressure control seal portion is a wide rectangular shape, and is provided so as to be orthogonal to the radial direction of the cutout. The food storage bag according to claim 1, which is characterized in that.

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