JP6326911B2 - Container for microwave oven and package for microwave oven - Google Patents

Description

  The present invention relates to a microwave oven container and a microwave oven package.

  Conventionally, various technologies have been proposed for a microwave oven container (see, for example, Patent Document 1).

  Patent Document 1 discloses a microwave cooking packaging container in which a peripheral seal portion is formed over the entire circumference of a flange portion of a synthetic resin container body, and a lid member is heat-sealed to the peripheral seal portion. The The peripheral seal portion is provided with a V-shaped or U-shaped protrusion toward the inside (opening side) of the container. According to this microwave cooking packaging container, when the moisture in the contents is heated in the microwave oven and the internal pressure rises, the lid is pushed up, and a part of the pushed up lid is automatically peeled off from the protruding portion. To do. Thereby, the sealing property of the container is lost, and the vapor in the container is discharged to the outside. Therefore, the user does not need to open the lid before setting the microwave oven.

  By the way, when such a container for microwave ovens is used for, for example, aseptic cooked rice, it is desired that the container main body be configured so as to reliably prevent intrusion of water vapor and oxygen. In this case, when the container body is made of a material having such a function, there is a problem that, for example, heat fusion with the lid material is not sufficient, and the function of automatically discharging steam cannot be maintained.

JP 2008-290738 A (FIG. 7)

  The present invention has been made in view of such circumstances, and its purpose is to prevent the intrusion of water vapor and oxygen while maintaining the function of automatically discharging the vapor when the contents are heated in a microwave oven. An object of the present invention is to provide a microwave oven container and a microwave oven packaging body having a container body that can be blocked.

The present invention is grasped by the following composition.
(1) A container for a microwave oven according to the present invention has a container body having an annular flange portion formed in a bowl shape around an opening formed at an upper end, and a rib shape over the entire circumference of the upper surface of the flange portion. And a heat-sealing part that is heat-sealed to the back surface of the lid member covering the opening, and the heat-sealing part is an annular part that is substantially similar to the inner peripheral shape of the opening; A steam discharge part formed in a part of the annular part and formed so as to open in a substantially V shape from the opening side toward the outer peripheral side of the flange part in plan view. However, it has a layer structure of a low foaming polyolefin sheet and a barrier film laminated on the entire surface of the lid material side surface of the low foaming polyolefin sheet.
(2) In the microwave oven container according to the present invention, in the configuration of (1), the barrier film has a layer structure of polyvinylidene chloride and propylene deposited on each of the front and back surfaces of the polyvinylidene chloride. It is characterized by.
(3) The container for a microwave oven according to the present invention is the propylene in which the barrier film is deposited on each of the ethylene vinyl alcohol copolymer resin and the front and back surfaces of the ethylene vinyl alcohol copolymer resin in the configuration of (1). It is characterized by having a layered structure.
(4) A microwave oven packaging body according to the present invention is a microwave oven packaging body for storing contents in a sealed state, and is sealed by a film-like lid material and the lid material (1) to (3). And a microwave oven container having any one of the structures described above.

  ADVANTAGE OF THE INVENTION According to this invention, when heating the contents in a microwave oven, the container for microwave ovens and the microwave oven packaging which have a container main body which can prevent the penetration | invasion of water vapor | steam and oxygen, maintaining the function which discharges | emits vapor | steam automatically The body is provided.

It is a perspective view of the packaging body for microwave ovens of embodiment which concerns on this invention. It is a top view of the package for microwave ovens shown by FIG. (A) is the sectional view on the AA line of FIG. 2, (b) is the B section enlarged view of (a). It is an expanded sectional view of the container for microwave ovens shown in FIG.3 (b). It is a top view of the container for microwave ovens shown by FIG. (A) is the C section enlarged view of FIG. 5, (b) is a figure which shows the comparative example of (a). It is explanatory drawing of the heat sealing | fusion part which concerns on a 1st modification, and is a figure corresponding to Fig.6 (a). It is explanatory drawing of the heat sealing | fusion part which concerns on a 2nd modification, and is a figure corresponding to Fig.6 (a). It is a figure explaining the usage example of the heat sealing | fusion part which concerns on a 2nd modification, and is a top view of the container for microwave ovens. It is a figure explaining the other usage example of the heat-fusion part which concerns on a 2nd modification, and is a top view of the corner part of the container for microwave ovens. It is a top view which shows the other structural example of the container for microwave ovens.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the accompanying drawings. The same number is attached | subjected to the same element through the whole description of embodiment.

(Whole structure of microwave oven packaging 10)
First, the whole structure of the microwave packaging body 10 is demonstrated based on FIG.
As shown in FIG. 1, the packaging body 10 for microwave ovens (henceforth "the packaging body 10") of embodiment preserve | saves the contents 11 in the sealed state. The package 10 includes a microwave oven container 20 (hereinafter referred to as “container 20”) and a film-like lid member 12 that seals the container 20 by closing the opening 22 of the container 20.

  The contents 11 are various foods and the like, and any kind can be used as long as they are heated using a microwave oven.

(Configuration of the cover 12)
Next, the configuration of the lid member 12 will be described with reference to FIG.
As shown in FIG. 2, the outer shape of the lid member 12 is formed along the outer shape of the container 20. The lid member 12 is composed of a single layer film or a multilayer film. At least the back surface of the lid member 12 is made of a synthetic resin (for example, a polyolefin resin typified by polyethylene) that can be heat-sealed to a heat-sealing portion 40 (described later) of the container 20.

(Configuration of container 20)
Next, the structure of the container 20 is demonstrated based on FIGS.
As shown in FIG. 3A, the container 20 is formed in a bowl shape around a tray-shaped container body 21 that is formed in a concave shape and can accommodate the contents 11, and an opening 22 at the upper end of the container body 21. And an annular flange portion 30.

Here, as shown in FIG. 3B, which is an enlarged view of part B of FIG. 3A, the container body 21 has a two-layer structure, for example, and is a lid of the base body 211 made of a low-foam polyolefin sheet. A barrier film 212 is laminated on the entire surface of the material 12 side. The low-foaming polyolefin sheet is made of, for example, a foamed sheet made of polyethylene, a foamed sheet made of polypropylene, or the like, and a mixture of other thermoplastic resin of less than 50 wt% with respect to the polyolefin resin is used. Further, the barrier film 212 has a three-layer structure as shown in FIG. 4 which is an enlarged view of a P portion in FIG. 3B, and propylene is formed on each of the front and back surfaces of the base material 212A made of, for example, polyvinylidene chloride. Layers 212B and 212C made of are formed. The structural formula of the polyvinylidene chloride of the substrate 212A is represented by the following formula (1).

バリアフィルム２１２の基材２１２Ａをポリ塩化ビニリデン、あるいはエチレンビニルアルコール共重合樹脂等とすることにより、水蒸気あるいは酸素の侵入に対する防壁層として機能するようになる。また、バリアフィルム２１２の基材２１２Ａの表裏面に形成する各層２１２Ｂ、２１２Ｃをプロピレンとすることにより、容器本体２１の基体２１１および蓋材１２との被着を強固にすることができる。 The base material 212A is not limited to polyvinylidene chloride, and may be, for example, an ethylene vinyl alcohol copolymer resin (Eval: trade name). The structural formula of the ethylene vinyl alcohol copolymer resin is represented by the following formula (2).

By using polyvinylidene chloride or ethylene vinyl alcohol copolymer resin as the base material 212A of the barrier film 212, the barrier film 212 functions as a barrier layer against intrusion of water vapor or oxygen. In addition, by using propylene for the layers 212B and 212C formed on the front and back surfaces of the base material 212A of the barrier film 212, adhesion between the base body 211 and the lid member 12 of the container body 21 can be strengthened.

  In addition, the thickness of the base body 211 of the container main body 21 has a value in the range of 0.1 to 1.5 mm, and the thickness of the barrier film 212 has a value in the range of 35 μm to 90 μm. The barrier film 2112 has a thickness of the base material 212A of 5 to 25 μm, the thicknesses of the front and back layers 212B and 212C of 10 to 30 μm, and the thickness of the adhesive layer that bonds the base material 212A and the layers 212B and 212C. Is 1 to 5 μm.

  As shown in FIG. 5, the outer shape of the container body 21 is formed in a substantially oval shape in plan view. The outer shape of the “container body” according to the present invention is not particularly limited to this example, and can be selected from various shapes such as a substantially rectangular shape, a substantially polygonal shape, and a substantially circular shape in addition to a substantially oval shape. Is possible.

  The flange portion 30 includes an annular base portion 31 formed with a substantially constant width along the inner peripheral shape of the opening 22, and a pair of gripping portions 32 protruding outward from the base portion 31. The base 31 includes a pair of linear portions 33 that are opposed to each other with the center of the container body 21 interposed therebetween, and a pair of arc-shaped portions 35 that are opposed to each other in a direction orthogonal to the opposing direction of the pair of linear portions 33. Become. Each gripping portion 32 is formed at a side end of the arc-shaped portion 35. Further, a heat fusion part 40 is formed on the base 31 of the flange part 30 over the entire circumference of the upper surface of the base 31.

  Returning to FIG. As shown in FIG. 3B, the heat-sealing portion 40 is formed in a rib shape so as to protrude upward from the upper surface of the base portion 31 formed of the layer structure of the base body 211 and the barrier film 212 of the container body 21. . At least the heat-sealed portion 40 of the container 20 is made of a synthetic resin (for example, polyolefin resin typified by polyethylene) that can be heat-sealed to the back surface of the lid member 12. The lid member 12 is heat-sealed. In addition, since the upper layer 212C is formed of propylene, the barrier film 212 of the container body 21 is firmly attached to the lid member 12.

  More specifically, by pressing a heated metal seal bar from above against the lid member 12 placed on the heat-sealing portion 40, the contact surface between the heat-sealing portion 40 and the lid member 12 is changed. Heat-sealed. The heat fusion strength on the contact surface can be adjusted by changing the temperature of the seal bar, the time for pressing the seal bar, the material of the heat fusion part 40, the material of the lid member 12, and the like. It is adjusted to an appropriate size according to the required sealing strength.

  On the other hand, the packaging body 10 is also required to have an easy opening property (easy peel property) for easily peeling off the cover material 12. In order to obtain easy-openability, it is effective to provide a portion that is not heat-sealed on the contact surface between the heat-sealing portion 40 and the lid member 12. For example, the back surface of the lid member 12 is made of low-density polyethylene, and the heat-sealed portion 40 is made of a material in which polypropylene is mixed with low-density polyethylene. Thereby, in the contact surface of the heat sealing | fusion part 40 and the cover material 12, the part heat-sealed and the part which is not heat-sealed can be provided.

  As shown in FIG. 5, the heat fusion part 40 is a steam discharge provided in the center of each of the unsealed part 41 formed in the center of the pair of arcuate parts 35 and the pair of linear parts 33. Part 42. An annular portion 43 is formed in a portion of the heat fusion portion 40 excluding the opening portion 41 and the steam discharge portion 42.

  Each opening portion 41 is formed so as to open in a substantially V shape from the outer periphery 30a side of the flange portion 30 toward the opening 22 side in plan view.

  The opening part 41 formed in this way has a function of satisfactorily peeling the lid member 12 when opening the package 10 taken out from the microwave oven. That is, when the edge portion 12a (see FIG. 1) of the lid member 12 is picked up by hand and pulled up in the grip portion 32 (FIG. 1, arrow (1)), stress is applied to the end portion 41a on the outer periphery 30a side of the opening portion 41. In order to concentrate, the cover material 12 peels favorably from the opening portion 41 toward the pair of end portions 41b on the opening 22 side starting from the end portion 41a on the outer periphery 30a side.

  As shown in FIG. 6A, the annular portion 43 is formed along an annular reference line L that is substantially similar to the inner peripheral shape of the opening 22. Further, the annular portion 43 is disposed from the opening 22 at a position less than 50% of the width W of the flange portion 30, that is, closer to the opening 22 than the width direction center C <b> 1 of the flange portion 30.

  Each vapor discharge part 42 is formed to open in a substantially V shape from the opening 22 side toward the outer periphery 30a side in a plan view. Further, the end portion 42 a on the opening 22 side of the steam discharge portion 42 is disposed slightly closer to the opening 22 than the reference line L in the width direction of the flange portion 30.

  On the other hand, the pair of end portions 42 b on the outer periphery 30 a side of the steam discharge portion 42 is disposed closer to the outer periphery 30 a than the reference line L in the width direction of the flange portion 30. In this example, the pair of end portions 42 b on the outer periphery 30 a side is disposed at a position that is 50% or more of the width W of the flange portion 30 from the opening 22, that is, closer to the outer periphery 30 a than the center C <b> 1 in the width direction of the flange portion 30. . And a pair of edge part 42b by the side of the outer periphery 30a is connected via the pair of inclination part 45 to the two edge parts 43a of the cyclic | annular part 43 arrange | positioned at the both sides of the steam discharge part 42. FIG.

  In this example, a configuration in which the steam discharge portion 42 and the inclined portion 45 are formed in a curved shape is shown, but the steam discharge portion 42 and the inclined portion 45 may be formed in a substantially linear shape. The opening angle of the end 42a of the steam discharge part 42, the angle formed by the steam discharge part 42 and the inclined part 45, and the size of the angle formed by the annular part 43 and the inclined part 45 can be arbitrarily set.

  In the steam discharge unit 42 configured as described above, the moisture in the contents 11 (see FIG. 1) is heated by the microwave oven, the internal pressure rises, and the lid 12 (see FIG. 1) is pushed up. The edge 12a (see FIG. 1) of the lid member 12 has a function of automatically peeling. That is, in the steam discharge part 42, when the lid 12 (see FIG. 1) is pushed up, stress concentrates on the end part 42a on the opening 22 side of the steam discharge part 42. The edge 12a (see FIG. 1) of the lid member 12 is automatically peeled off. As a result, the sealing performance is lost, and the steam is exhausted from the steam discharge portion 42. In addition, the depth d1 of the steam discharge part 42 is set to an appropriate size according to the required steam discharge function.

(Effect of embodiment)
The effects of the embodiment described above will be described.
In the present embodiment, in the heat fusion part 40, the pair of end parts 42 b on the outer periphery 30 a side of the steam discharge part 42 are arranged on the outer periphery 30 a side with respect to the reference line L. In addition, the pair of end portions 42 b on the outer periphery 30 a side of the steam discharge portion 42 is connected to the end portion 43 a of the annular portion 43 via the pair of inclined portions 45. Thereby, the annular portion 43 can be disposed close to the opening 22 of the container body 21 while ensuring the necessary depth d1 of the steam discharge portion 42.

  Here, let us consider a case where the pair of end portions of the steam discharge portion and the end portions of the annular portion are directly connected.

FIG.6 (b) is a figure which shows the comparative example of the heat sealing | fusion part 40 shown by Fig.6 (a).
As shown in FIG. 6B, in the heat fusion part 100 according to this comparative example, the pair of end parts 101 a of the steam discharge part 101 are arranged at substantially the same position as the annular part 103 in the width direction of the flange part 102. . That is, the pair of end portions 101 a of the steam discharge portion 101 and the end portion 103 a of the annular portion 103 are directly connected without providing an inclined portion. In the heat fusion part 100 configured as described above, the annular part 103 is necessarily positioned away from the opening 106 of the container main body 105 by an amount corresponding to the depth d1 of the steam discharge part 101. For this reason, the distance P3 from the opening 106 to the annular portion 103 becomes longer. As a result, the gap into which the contents enter on the upper surface of the flange portion 102 becomes wider.

  In this respect, in the heat-sealing part 40 shown in FIG. 6A, the annular part 43 can be disposed close to the opening 22 of the container main body 21, so that the distance P1 from the opening 22 to the annular part 43 is shortened. Can do. Therefore, according to the present embodiment, the gap into which the contents 11 enter can be narrowly formed on the upper surface of the flange portion 30 while maintaining the function of automatically discharging the steam by the steam discharge portion 42.

  Moreover, since the container main body 21 has the base | substrate 211 which consists of a low foaming polyolefin sheet | seat, when taking out the package 10 after a range up, the package 10 can be taken out in the state which is not hot. In this case, since the barrier film 212 is laminated on the surface of the base body 211 on the lid member 12 side, the entry of water vapor and oxygen can be prevented, and the adhesion with the lid member 12 can be ensured.

(Modified example of heat fusion part)
Then, the modification of a heat-fusion part is demonstrated based on FIGS.
FIG. 7 is an explanatory diagram of the heat-sealing portion according to the first modification, and corresponds to FIG. FIG. 8 is an explanatory diagram of a heat fusion part according to a second modification, and corresponds to FIG. FIG. 9 is a diagram for explaining a usage example of the heat fusion part according to the second modification, and FIG. 10 is a diagram for explaining another usage example of the heat fusion part according to the second modification. In addition, the same code | symbol is attached | subjected to the element which is common in the heat sealing | fusion part 40 (refer FIG. 6A) mentioned above, and the overlapping description is abbreviate | omitted.

(First modification)
In the above-described heat-sealing part 40 (see FIG. 6A), an example in which the end part 42a on the opening 22 side of the steam discharge part 42 is disposed on the opening 22 side slightly from the reference line L is shown. The position of the end portion on the opening side of the “steam discharge part” can be arbitrarily changed.

  For example, like the heat fusion part 40A shown in FIG. 7, the end part 42a on the opening 22 side of the steam discharge part 42A may be arranged at a position where the reference line L passes.

  According to this heat fusion part 40A, since the end part 42a on the opening 22 side of the steam discharge part 42A is arranged on the reference line L, the annular part 43 can be arranged at the opening 22. Thereby, the distance P2 from the opening 22 to the annular portion 43 can be further shortened. Therefore, the gap into which the contents 11 enter on the upper surface of the flange portion 30 can be further narrowed.

(Second modification)
In the above-described heat-sealing part 40 (see FIG. 6A), an example in which the steam discharge part 42 and the inclined part 45 are smoothly connected is shown. The form of can be arbitrarily changed.

  For example, like the heat fusion part 40B shown in FIG. 8, the steam discharge part 42B and the inclined part 45B may be connected so as to be angular toward the outer periphery 30a side of the flange part 30.

  In the heat fusion part 40B, the steam discharge part 42B and the pair of inclined parts 45B are connected in a substantially M shape, whereby a pair of opening parts 41B are formed on both sides of the steam discharge part 42B. Each of the pair of opening portions 41B is formed so as to open in a substantially V shape from the outer periphery 30a side to the opening 22 side in a plan view. Thereby, the multi-function part 51 which has a vapor | steam discharge function and an opening function can be provided in the flange part 30 in a space-saving manner.

  In this multi-function part 51, since the steam discharge part 42B and the inclined part 45B are connected so as to be angular, the depth d2 becomes relatively large. Thus, it is preferable to provide the multi-function part 51 with the large depth d2 in the part formed in the flange part 30 comparatively wide.

  For example, like the container 20 </ b> C shown in FIG. 9, a multi-function part 51 having both a steam discharge function and an opening function can be provided in each of the pair of gripping parts 32 in a space-saving manner. Alternatively, as shown in FIG. 10 (a), in the flange portion 30 which is a container 20D whose outer shape is a square (for example, substantially rectangular shape) and is formed in a bowl shape in the opening at the upper end, four corner portions The present invention can also be applied to the case where 52 is wider than other portions. That is, as shown in FIG. 10B, which is an enlarged view of the one-dot chain line frame P in FIG. 10A, the multi-function portion 51 is provided in the corner portion 52 that is the wide portion of the flange portion 30 in a space-saving manner. Can do. Thus, by integrating the multi-function part 51 having both the steam discharge function and the opening function into the grip part 32 and the corner part 52, the widths W1, W2 of the other parts of the flange part 30 can be formed narrower. . As a result, more compact containers 20C and 20D can be obtained.

(Other configuration examples of containers)
Next, another configuration example of the container will be described with reference to FIG. FIG. 11 is a plan view showing another configuration example of the container. In addition, the same code | symbol is attached | subjected to the element which is common in the container 20 (refer FIG. 5) mentioned above, and the overlapping description is abbreviate | omitted.

  In the container 20 (see FIG. 5) described above, the container main body 21 having one storage portion for storing the contents 11 is shown. However, the “container main body” referred to in the present invention has a plurality of storage portions. It may be a thing.

  For example, as shown in FIG. 11, in the container 20 </ b> E, the container main body 21 </ b> E has two accommodating portions 53. These two accommodating portions 53 are partitioned by a partition wall 55. On the upper surface of the partition wall 55, a connecting portion 56 that connects the opposing portions of the annular portion 43 is formed. The two accommodating parts 53 are sealed by heat-welding a lid member (not shown) to the heat-sealing part 40E including the connecting part 56.

  Furthermore, the heat-sealing part 40E has two vapor | steam discharge parts 42E arrange | positioned in the diagonal direction of the container 20E in planar view. These two steam discharge parts 42E are provided corresponding to the two accommodating parts 53, respectively. In each heat-sealing portion 40E, a pair of end portions 42b on the outer periphery 30a side of the steam discharge portion 42E is disposed on the outer periphery 30a side with respect to the reference line L. Moreover, the end part 42b of the steam discharge part 42E is connected to the end part 43a of the annular part 43 through the inclined part 45E.

  According to the container 20E configured as described above, the steam can be automatically discharged from each of the two storage parts 53 by the two steam discharge parts 42E, and the annular part is formed in the opening 22 of the container body 21E. 43 can be arranged close to each other.

  In the container main body 21E, as described above, a barrier film is laminated on the entire surface of the base member made of the low foamed polyolefin sheet on the side of the lid member 12, and the barrier film is made of polyvinylidene chloride (or ethylene). A layer made of propylene is formed on each of the front and back surfaces of a base material made of a vinyl alcohol copolymer resin).

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above embodiment. Further, it is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  For example, in the embodiment, the heat fusion portions 40, 40A, 40B, and 40E are shown. However, the “heat fusion portion” referred to in the present invention may be an appropriate combination of these heat fusion portions 40A, 40B, and 40E. Good.

10 Packaging (Microwave packaging)
11 Contents 12 Cover material 20 Container (container for microwave oven)
20C container (container for microwave oven)
20D container (microwave oven container)
20E container (microwave oven container)
21 Container body 211 Base body 212 Barrier film 212A Base material 212B Layer 212C Layer 21E Container body 22 Opening 30 Flange 30a Outer periphery 40 Thermal fusion part 40A Thermal fusion part 40B Thermal fusion part 40E Thermal fusion part 41 Unsealing part 41B Unsealing Part 42 Steam exhaust part 42a Open side end part 42b A pair of outer peripheral side parts 42A Steam exhaust part 42B Steam exhaust part 42E Steam exhaust part 43 Annular part 43a End part 45 Inclined part 45B Inclined part 45E Inclined part 53 Housing part 55 Partition wall L Reference line W Flange width

Claims (4)

A container for a microwave oven,
A container body having an annular flange formed in a bowl shape around an opening formed at the upper end;
A heat-sealed portion that is formed in a rib shape over the entire circumference of the upper surface of the flange portion, and is heat-sealed to the back surface of the lid member covering the opening;
Have
The heat fusion part is
An annular portion having a shape substantially similar to the inner peripheral shape of the opening;
A steam discharge part formed on a part of the annular part and formed to open in a substantially V shape from the opening side toward the outer peripheral side of the flange part in plan view;
Have
The container body has a layer structure of a low foaming polyolefin sheet and a barrier film laminated on the entire surface of the lid material side surface of the low foaming polyolefin sheet ,
The low foaming polyolefin sheet is a mixture of other thermoplastic resin of less than 50 wt% with respect to the polyolefin resin,
The container for microwave ovens , wherein the barrier film has a layer structure of ethylene vinyl alcohol copolymer resin and propylene deposited on the front and back surfaces of the ethylene vinyl alcohol copolymer resin . The thickness of the polyolefin sheet is a value in the range of 0.1 mm to 1.5 mm,
The thickness of the barrier film is a value in the range of 35 μm to 90 μm,
The barrier film has a thickness of the ethylene vinyl alcohol copolymer resin of 5 μm to 25 μm, a thickness of the propylene of 10 μm to 30 μm, and a thickness of an adhesive layer that bonds the ethylene vinyl alcohol copolymer resin and the propylene. The container for a microwave oven according to claim 1, wherein the value is in a range of 1 µm to 5 µm. The annular portion is formed along an annular reference line that is substantially similar to the inner peripheral shape of the opening, and is disposed closer to the opening than the center in the width direction of the flange portion,
The substantially V-shaped steam discharge portion has an opening disposed between a pair of outer end portions disposed on the outer peripheral side of the reference line in the width direction of the flange portion and the pair of end portions. The container for microwave ovens of Claim 1 or 2 characterized by including the edge part of a side. A package for a microwave oven for storing contents in a sealed state,
A microwave oven package for aseptic cooked rice , comprising: a film-like lid material; and the microwave oven container according to any one of claims 1 to 3, which is sealed by the lid material.

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