JP2011148501A - Microwave cooking bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a microwave cooking bag having a bottom gusset, the bag being configured to easily be closed, prevent the rupture of the bag caused by a sudden increase in pressure in the bag, and safely be held by a user even after heat cooking. <P>SOLUTION: In the microwave cooking bag 1 having two sealed side edges 30 and a bottom gusset, a pair of films 10a and 10b forming a body 10 for the bag 1 is provided. Each of the films 10a and 10b has an upper lid 20, and a crease 21 formed on the lower edge of the upper lid 20 and used for opening or closing the upper lid 20 around it. Each crease 21 extends from the one side edge to as an initial point to the other side edge 30 as a final point, and curves downward. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a bottom gusset type bag that can be cooked in a microwave oven.

  In recent years, home cooking such as boiled foods, steamed foods, and stir-fried foods that have been performed in pots and pans has been performed using microwave ovens. Bags made of synthetic resin films can be used as cooking bags in microwave ovens. It has been proposed to be used as One of these bags is a standing pouch-shaped microwave cooking bag having a bottom gusset. The microwave cooking bag needs a means for discharging the internal steam.

  As this type of bottom gusset-type microwave cooking bag, Patent Document 1 discloses that a part of the bag is made of paper material and can be closed by folding using paper dead hold property. The bag is listed. Patent Document 2 describes a microwave heating bag that can be closed using a zipper-type fastener.

Japanese Patent No. 2688734 Japanese Patent No. 3802205

  However, the microwave oven cooking bag of Patent Document 1 is used by bending the upper portions of the front and rear wall portions integrally (see FIG. 6 of Patent Document 1), and the steam is discharged from the gap between the folded portion and the paper material itself. It is done using breathability. In this case, when there is a sudden rise in internal pressure due to bumping, etc., there is no mechanism that can easily and quickly release the internal pressure, so the internal pressure cannot be released, the bag bursts, and the contents are scattered There is a risk of contamination of the microwave oven. In addition, when the bursting pressure is high, the microwave oven door opens and high-temperature foods and seasonings are released outside the microwave oven, so there is a risk of burns if a person stands in front of the microwave oven. .

  The microwave oven heating bag of Patent Document 2 discharges steam using a part of the body heat seal part as a non-seal part. For this reason, as in the case of the above-mentioned bag of Patent Document 1, when a sudden increase in internal pressure occurs due to bumping or the like, the internal pressure cannot be released only with the vent of the non-sealed part, the bag bursts, and the contents are scattered. There is a risk of contamination of the microwave oven. Moreover, since the vapor | steam discharge port is provided in the side edge part of the bag, there exists a possibility of a burn if it has the discharge port vicinity of a side edge part after microwave cooking.

  Therefore, the present invention provides a bottom gusset type microwave cooking bag that can be easily closed, prevents the bag from rupturing due to a sudden increase in internal pressure, and can be safely held by the user even after cooking. Is the purpose.

  As a result of intensive studies to solve the above problems, the present inventors have found that the upper part of both films of the trunk portion of the standing-shaped bag is bent into a curved shape to form a simple upper lid with a curved surface, The present invention has been completed.

Specifically, the present invention provides:
(1) A bottom gusset-type microwave cooking bag with both side edges sealed, each having a pair of films forming the body of the bag, each film comprising an upper lid and an upper lid A microwave cooking bag formed at a lower edge portion and having a fold line for opening and closing the upper lid, the fold line being formed between the both side edge portions and curved downwardly. It is. Also,
(2) The microwave cooking bag according to (1), wherein the fold line has a start point and an end point on the both side edges, and a vent is provided at an intersection of the fold line and the side edges. It is.

  The microwave cooking bag of the present invention can be easily closed, can be safely carried by the user after cooking, and can prevent the bag from bursting even if a sudden increase in internal pressure occurs. Furthermore, the microwave oven cooking bag of the present invention can promote steam convection without contaminating the inside of the microwave oven during cooking, and has excellent self-supporting stability.

It is a front view of the microwave cooking bag concerning this Embodiment. It is a perspective view of the microwave oven cooking bag. It is a perspective view of the bag for microwave oven cooking in the state where the upper cover of one side was closed. It is a perspective view of the bag for microwave oven cooking which has a slit-shaped vent. It is a front view of the microwave oven cooking bag which has a slit-like vent. It is a perspective view of the microwave oven cooking bag which has a hole-shaped vent. FIG. 6 is a front view of another type of bottom gusset type microwave cooking bag. It is a perspective view of the bag for microwave oven cooking of another kind of bottom gusset type. It is a side view of the bag for microwave cooking of another kind of bottom gusset type. It is a front view of the microwave cooking bag which has a handle.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a microwave cooking bag 1 according to the present embodiment, and FIG. 2 is a perspective view of the microwave cooking bag 1 with an upper lid closed.

 The microwave cooking bag 1 is of the bottom gusset type used as a standing shape in order to prevent seasoning liquid from leaking from the bag during microwave cooking and to prevent contamination in the cabinet. The bottom gusset type bag is a bag provided with a so-called town at the bottom of the bag to provide independence. This so-called town part is called a bottom gusset.

 The microwave cooking bag 1 has, for example, a trunk portion 10 made of a pair of front and rear films 10a and 10b, and a bottom portion 11 that forms a bottom gusset. Each of the films 10 a and 10 b of the body portion 10 is formed on the upper lid 20 and a lower end portion of the upper lid 20 and has a fold line 21 for opening and closing the upper lid 20.

  The upper lid 20 has a substantially ship-bottom shape, and has an arcuate upper edge that is convexly curved upward and an arc-shaped lower edge that is convexly curved downward. The fold line 21 is formed along the lower edge portion of the upper lid 20 and on both side edge portions 30 of the trunk portion 10, and is curved convexly downward. By folding the two upper lids 20 of these films 10a and 10b inward from the fold line 21 as shown in FIG. 3, the upper opening of the body 10 is closed.

  As shown in FIG. 1, both side edge portions 30 of the body portion 10 are sealed by heat sealing (side seal portion 30). The fold line 21 has both side seal portions 30 as a start point and an end point.

  The bottom portion 11 has a substantially ship-bottom shape like the top lid 20, and is installed between the front and rear films 10a and 10b. For example, both front and rear edge portions are positioned below the center of each film 10a and 10b. It is connected. As shown in FIG. 1, the bottom portion 11 can be folded in a mountain-folded state with the center on the upper side, and can open as a curved surface having a bottom shape as shown in FIG. 2, thereby forming the bottom of the bag 1. The films 10 a and 10 b on both side edges of the bottom portion 11 are also heat-sealed and joined to each other to form the side seal portions 30, similarly to the side edge portions of the body portion 10. The lower side of the bottoms 11 of the films 10a and 10b is a leg part 31 having a horizontal lower end so that the bag 1 can be stood stably.

  According to this embodiment, since the microwave cooking bag 1 has the upper lid 20 and the fold line 21, the inside of the bag 1 can be easily closed by tilting the two upper lids 20 inward from the fold line 21. it can. Moreover, when cooking in a microwave oven with the upper lid 20 closed, excess steam can be discharged from the gap between the upper lid 20, convection of the steam is promoted, and a uniform heating and steaming effect of the food can be provided. .

  Moreover, during cooking in the microwave oven, the inside of the cabinet is prevented from being splashed by the splashing of ingredients and seasoning liquid. Furthermore, when a sudden rise in internal pressure occurs, the upper lid 20 that is simply bent is easily opened. The internal pressure can be released. For this reason, even in the unlikely event, the bag is not ruptured and the scattering of the contents can be minimized. As a result, it is possible to achieve both cooking characteristics and user safety with a very simple structure.

  Moreover, since steam escapes from the clearance gap between the upper lid | cover 20, it can have the side part of the bag 1, and it becomes easy to carry the bag 1 after heat cooking.

  Furthermore, since the bent lid 21 is folded and the upper lid 20 is closed, the front and rear widths of the upper lid 20 are also increased, and the bottom gusset-type bag itself can be three-dimensionally stabilized. The self-supporting stability of the bag can be increased.

  In the case where the films 10a and 10b of the body portion 10 are made of synthetic plastic, the fold line 21 can be created by heat sealing or broken-line notches, so-called perforations, and is a paper material or a paper material laminated with a synthetic film. Can be formed by folding lines. Moreover, when the trunk | drum 10 consists of elastomers, such as silicone rubber, the broken line 21 by thickness thinness can be formed. The folding line 21 can also be realized by adhering a rod-like member to the films 10a and 10b in a curved shape, or adhering the upper lid 20 itself having a curved lower edge to the films 10a and 10b. At this time, when the rod-shaped member described above is formed of an elastomer, when the food or seasoning liquid is put into the bag by using the contracting force of the rod-shaped elastomer, the effect of achieving easy opening of the bag mouth is also achieved. Obtainable.

  The microwave cooking bag 1 may be provided with a vent hole for discharging steam on the upper lid 20. As shown in FIGS. 4 and 5, the vent 50 may be formed in a straight slit shape by forming notches on both side edges of the upper lid 20, or as shown in FIG. And may be appropriately determined depending on the amount of steam to be discharged. By forming the vent 50, it is possible to stably perform steam removal during cooking in the microwave oven. The vent 50 can be formed at an arbitrary position of the upper lid 20, but can be provided at the intersection of the fold line 21 and the side seal portion 30 as a more preferable installation position. In this case, the vents are not displaced due to the bulge of the bag 1 during cooking as in the case where the vents are formed in the two upper lids 20, respectively, and the steam can be discharged properly.

  In the above embodiment, as shown in FIGS. 7 to 9, the side seal portions 30 of the films 10a and 10b of the bottom portion 11 are not joined to each other, and the side seal portions 30 of the films 10a and 10b of the bottom portion 11 are not joined. It may be opened 180 degrees. It is preferable to form the raised bottom portion 11 as shown in FIGS. 1 and 2 in terms of uniform heating in microwave heating, and it is preferable that the raised bottom portion 11 is formed on the flat bottom portion 11 as shown in FIGS. It is preferable from the standpoint of the self-supporting stability of the bag.

  As described above, the microwave cooking bag 1 according to the present invention has a structure in which steam is discharged upward in the bag 1 in order to discharge the steam from the gap of the upper lid 20 and the vent 50. For this reason, the user can hold both side seal portions 30 by hand after cooking. At this time, it is preferable that at least a part of the side seal portions 30 has a width of 7 mm or more.

  After cooking in the microwave oven, the temperature of the food material is close to about 100 ° C., so that the films 10a and 10b of the body 10 are also heated to the same temperature by heat transfer. At this time, it is preferable that the side seal portion 30 has a width of 7 mm or more in order to securely hold the bag without being burned. If it is 7 mm or more, there is no fear of burns or depending on how it is held, there is no risk of dropping the heated bag without holding it well. A preferable seal width is 10 mm or more and 20 mm or less.

  Further, as shown in FIG. 10, the width of the side seal portion 30 may be set to be a part of the handle 60 and may be set within the above range, and can be appropriately designed so that the internal volume can be used effectively. When the side seal portion 30 is used as the handle 60, it is not necessary to provide a special handle on the upper portion, and even in a small turntable microwave oven, the rotation does not stop and the occurrence of uneven heating can be suppressed.

  In the microwave cooking bag according to the present invention, a polyolefin resin, a polyamide resin, a polyester resin thermoplastic resin, paper, or the like can be used as the resin. Among these, films and papers made of various resins such as films made of polyolefin resins such as polyethylene and polypropylene, films made of polyamide resins such as nylon, and films made of polyester resins such as polyethylene terephthalate and polybutylene terephthalate. Can be appropriately selected or used in combination. Among these combinations, a two-layer film or a three-layer film in which a polypropylene resin film is used for the seal layer and a nylon film or a polyethylene terephthalate film is laminated on the outer layer can be more suitably used. For example, a two-layer film of a polyethylene terephthalate film and a polypropylene film, a three-layer film of a polyethylene terephthalate film and nylon and a polypropylene film, a two-layer film of polypropylene and paper, and the like can be given. Moreover, the microwave cooking bag of this invention can be shape | molded from elastomers, such as a silicone rubber, polyolefin type | system | group, a polyamide type | system | group, and a polyurethane type | system | group.

  Moreover, in order to improve the stability of the upper lid 20 when it is bent, the rigidity of the film can be appropriately selected. Since the rigidity of the film depends on the thickness and the elastic modulus, the material and the thickness can be appropriately selected and used, and the preferred thickness is 30 μm or more and 200 μm or less. When the thickness is 30 μm or more, the rigidity is appropriate, and the curved upper lid 20 can be formed with good stability. On the other hand, when the thickness is 200 μm or less, the whole bag is flexible and handling properties are good. A more preferable thickness is 50 μm or more and 150 μm or less. More preferably, they are 60 micrometers or more and 120 micrometers or less.

  The range of the elastic modulus of a preferable film is 0.1 GPa or more and 20 GPa or less. If it is 0.1 GPa or more, the rigidity is moderate and the curved upper lid 20 can be formed with good stability, and if it is 20 GPa or less, the entire bag is flexible and the handling property is good. A more preferable range of the elastic modulus is 1 GPa or more and 10 GPa or less, and further preferably 1.5 GPa or more and 5 GPa or less.

  Furthermore, in order to improve the closing property of the upper lid 20, a simple locking mechanism to the upper lid 20 can be provided. As such a method, it can be simply taped, a tongue piece is provided on the upper lid 20, and an insertion port such as a slit or a string is provided on the folding line 21 or on the films 10a and 10b of the body part 10. By providing, a simple lock can be formed.

  The microwave oven cooking bag of the present invention can be manufactured using a known method. For example, in the case of making a bag from a film, a roll-shaped film is drawn out, half-folded, then the bottom town is folded, the bottom is heat-sealed to the bottom of the ship, and the upper part of the film 10a, 10b of the trunk 10 is curved upward. The upper lid 20 can be formed by cutting in a broken line shape into a downwardly projecting shape at the same time as cutting. Further, after the film is pulled out from the roll and half-folded, a folding line 21 is created by heat sealing so that the inner surfaces of the film do not adhere to each other, and after the bottom 11 is folded, the bottom 11 is heat-sealed in a ship bottom shape. The upper part of the films 10a and 10b of the body part 10 can also be made through a process of cutting into an upwardly curved shape. When an elastomer such as silicone rubber is used, it can be formed into a bag shape by compression molding or injection molding.

  As described above, the microwave cooking bag according to the present invention promotes the convection of steam without contaminating the inside of the microwave oven during cooking, and can be safely carried by the user after cooking. Even if it rises, since it has an effect of preventing the bag from bursting, it can be suitably used for microwave cooking of fresh foods and processed foods. Fresh ingredients here are raw ingredients such as meat, fish, vegetables, etc.Processed ingredients are ingredients that have been processed fresh ingredients, such as frozen vegetables and frozen foods, boil, bake, fry, steam, cook, It refers to foods that have been processed such as frying, and seasoning liquids and seasonings can be added to these foods as appropriate, and cooking can be performed in a microwave oven.

  Since the bag of the present invention has a simple top lid, it can promote convection of steam during cooking and acts as a safety mechanism in the event of an internal pressure increase, so as a bag for microwave oven cooking It can be used suitably.

1 Microwave Cooking Bag 10 Body 10a, 10b Film 11 Bottom 20 Upper Lid 21 Folding Line 30 Side Edge (Side Seal)
31 Leg 50 Vent 60 Handle

Claims (2)

A bottom gusset-type microwave cooking bag with both side edges sealed,
Having a pair of films forming the bag body;
Each film has an upper lid and a fold line for opening and closing the upper lid, which is formed at a lower edge portion of the upper lid.
The fold line is a microwave oven cooking bag having the both side edge portions as a starting point and an ending point and curved downwardly.   The microwave oven cooking bag according to claim 1, wherein an air vent is provided at an intersection of the broken line and the side edge.

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