JP2019142563A - Paper container for microwave heating - Google Patents

Abstract

To provide a paper container for microwave heating that can burn food, shorten the cooking time of frozen food, and prevent uneven heating.SOLUTION: The paper container 1 for microwave heating includes a cylindrical body part 3, a bottom surface part 2 for closing a lower surface of the body part 3, and a bottomed cylindrical storage part 16 formed by the body part 3 and the bottom surface part 2, and is formed by a laminate including a paper layer 31, the laminate has a heat generating part H1 in which a heat generating layer 33 generating heat by microwave irradiation is disposed on an inner surface side of a paper layer 31, and a non-heat generating part H2 in which the heat generating layer 33 is not formed, the heat generating part H1 is disposed only on the innermost laminate facing the storage part 16 and is disposed on at least one of the bottom surface part 2 and the body part 3.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a microwave heating paper container that contains contents and is heated by a microwave oven.

  A conventional microwave heating paper container is disclosed in Patent Document 1. The microwave heating paper container is formed by bending a sheet material, and a plurality of side plates are erected from a rectangular bottom plate. A pair of side plates facing each other is provided with a lid, and the lid is bent from the side plate to open and close the upper surface of the microwave heating paper container.

  The microwave heating paper container containing the contents is microwave-heated by the microwave oven with the lid part opened or closed. When the predetermined time has elapsed, the microwave oven is stopped and cooking of the contents is completed.

JP 2008-68885 A (pages 5 to 8, FIG. 6)

  Cooking by microwave heating can not burn the contents of food, so the choice of cooking is narrowed. For this reason, it is desirable to be able to cook with a microwave oven.

  Further, when the contents are frozen food, the contents are easily dissolved from the ridgeline at the boundary between each side plate and the bottom plate, and the microwave is concentrated on the dissolved water and the vicinity of the ridgeline is heated intensively. For this reason, there is a problem that it takes time until the inside of the contents is heated, and the cooking time becomes longer and heating unevenness occurs.

  An object of the present invention is to provide a microwave heating paper container that can scorch foods, shorten cooking time of frozen foods, and prevent uneven heating.

  In order to achieve the above object, the present invention includes a cylindrical body, a bottom surface that closes a lower surface of the body, and a bottomed cylindrical storage formed by the body and the bottom. In the microwave heating paper container formed by a laminated body including a paper layer, the laminated body has a heat generating portion in which a heat generating layer that generates heat by microwave irradiation is disposed on the inner surface side of the paper layer; A non-heat generating portion formed, and the heat generating portion is disposed only on the innermost laminated body facing the storage portion and is disposed on at least one of the bottom surface portion and the trunk portion. Yes.

  According to this configuration, the contents are heated by the microwave when cooking by the microwave oven is started. Further, the heat generating layer generates heat by the microwave, and the contents are heated from the surroundings by the radiant heat of the heat generating layer.

  According to the present invention, in the microwave heating paper container configured as described above, the heat generating portion is disposed on the bottom surface portion and the body portion.

  According to the present invention, in the microwave heating paper container having the above-described configuration, a lid portion that opens and closes an upper surface of the barrel portion is provided, and an upper end portion of the barrel portion and the lid portion are formed by the non-heat generating portion. Yes.

  According to the present invention, in the microwave heating paper container having the above-described configuration, the laminated body is a polygonal bottom plate that forms the bottom surface portion, and the body portion is formed by bending from each side of the bottom surface plate. A plurality of side plates, and a plurality of folding pieces that are connected to the adjacent side plates and folded on a fold line extending from the top of the bottom plate and arranged on the outer surface of the side plates. A piece is formed by the non-heat generating portion.

  According to the present invention, in the microwave heating paper container having the above-described configuration, the laminated body is a polygonal bottom plate that forms the bottom surface portion, and the body portion is formed by bending from each side of the bottom surface plate. The area occupancy ratio of the heat generating part in the peripheral part of the surface on which the heat generating part is arranged is smaller than the area occupying ratio of the heat generating part in the central part.

  According to the present invention, in the microwave heating paper container configured as described above, a peripheral portion of a surface on which the heat generating portion is disposed is formed by the non-heat generating portion.

  According to the present invention, in the microwave heating paper container having the above-described configuration, the laminated body is a polygonal bottom plate that forms the bottom surface portion, and the body portion is formed by bending from each side of the bottom surface plate. A heat generating amount per unit area of the heat generating portion in a peripheral portion of the surface on which the heat generating portion is disposed is smaller than a heat generating amount per unit area of the heat generating portion in the central portion. It is a feature.

  According to the present invention, in the microwave oven heated paper container configured as described above, the heat generating portion has a large number of minute recesses formed on the inner surface of the paper layer.

  According to the present invention, in the microwave heating paper container configured as described above, the laminate has a protective layer of a resin film disposed on an inner surface, and the heat generating layer is made of conductive ink printed on the protective layer. It is characterized by that.

  In the microwave heating paper container having the above-described configuration, the present invention includes a resin film protective layer on the inner surface of the laminate, and the heat generating layer is a vapor-deposited film containing a metal formed on the protective layer. It is characterized by that.

  According to the present invention, the heat generating portion in which the heat generating layer that generates heat by the microwave irradiation is disposed on the inner surface side of the paper layer is disposed on the bottom surface portion or the body portion. For this reason, the contents are heated from the surroundings by the microwave and the radiant heat of the heat generating layer. Thereby, while being able to burn a foodstuff, the cooking time of frozen food can be shortened and a heating nonuniformity can be prevented. In addition, since the heat generating portion is disposed only on the innermost laminated body facing the storage portion, the heat generating layer is not stacked, and ignition of the laminated body due to overheating can be prevented.

The perspective view which shows the microwave oven heating paper container of 1st Embodiment of this invention. The perspective view which shows the state which opened the microwave oven heating paper container of 1st Embodiment of this invention. The top view which shows the blank board of the microwave oven heating paper container of 1st Embodiment of this invention Sectional drawing which shows the layer structure of the blank board of the microwave oven heating paper container of 1st Embodiment of this invention The top view which shows the blank board of the microwave oven heating paper container of 2nd Embodiment of this invention The top view which shows the blank board of the microwave oven heating paper container of 3rd Embodiment of this invention Sectional drawing which shows the layer structure of the blank board of the microwave oven heating paper container of 4th Embodiment of this invention.

<First Embodiment>
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the microwave heating paper container of the first embodiment. FIG. 2 is a perspective view showing a state where the lid 4 of the microwave heating paper container 1 is opened. The microwave heating paper container 1 (hereinafter referred to as “paper container 1”) is formed by bending a single blank plate 30 (see FIG. 3) made of a laminate including a paper layer 31 (see FIG. 4). Stores contents such as food.

  In the paper container 1, the bottom surface of the cylindrical body portion 3 is closed by the bottom surface portion 2 (see FIG. 3), and a bottomed cylindrical storage portion 16 for storing contents is formed. The upper surface of the trunk portion 3 is opened and closed by the lid portion 4. The bottom surface portion 2 is formed in a rectangular shape, and the body portion 3 is formed by a pair of side plates 6 facing each other and a pair of side plates 7 facing each other. The lid 4 is formed by an upper surface plate 8 and an upper surface plate 9 that are connected to the upper end of each side plate 7.

  Adjacent side plates 6 and side plates 7 are connected by folding pieces 11. The folded piece 11 is folded in two and stuck on the side plate 6. Thereby, the area | region where the folding piece 11 is distribute | arranged comprises the multiplexing part 15 which piled up the laminated body by the folding piece 11 and the side plate 6 folded in half (three in this embodiment).

  FIG. 3 shows a plan view of the blank plate 30 in which the paper container 1 is developed. The blank plate 30 has a rectangular bottom plate 5 that forms the bottom portion 2. A side plate 6 is connected to one opposite two sides of the bottom plate 5 via a fold line 20, and a side plate 7 is connected to the other two opposite sides via a fold line 20. The side plates 6 and 7 are erected from each side of the bottom plate 5 by bending to form the body 3 (see FIG. 1).

  An upper surface flap 10 is connected to the side surface plate 6 through a fold line 20 so as to face the bottom surface plate 5. One side plate 7 is provided with a top plate 8 facing the bottom plate 5, and the other side plate 7 is provided with a top plate 9 facing the bottom plate 5. An insertion piece 8 a is provided at the tip of the upper surface plate 8, and a slit 9 a is provided in the upper surface plate 9. By inserting the insertion piece 8a into the slit 9a, the closed state of the lid 4 (see FIG. 1) is maintained.

  A folding piece 11 is connected between the side plate 6 and the side plate 7 adjacent to each other via a fold line 20. The folding piece 11 is formed in a substantially fan shape centering on each vertex of the bottom plate 5, and is folded in two on a folding line 20 a extending from each vertex of the bottom plate 5.

  The blank plate 30 has a heat generating portion H1 provided with a heat generating layer 33 (see FIG. 4) that generates heat by microwave irradiation, and a non-heat generating portion H2 in which the heat generating layer 33 is not formed. The entire surface of the bottom plate 5 is formed by the heat generating portion H1. The upper end portions of the side plates 6 and 7 (opposite side of the bottom plate 5) are formed by the non-heat generating portion H2, and are formed by the heat generating portion H1 except for the upper end portion. Moreover, the folding piece 11, the upper surface plate 8, the upper surface plate 9, and the upper surface flap 10 are formed by the non-heating part H2.

  For this reason, the heat generating part H1 is arranged only in the part facing the storage part 16 and in contact with the contents arranged on the bottom plate 5. That is, the upper end portion of the body portion 3 (see FIG. 1) and the lid portion 4 (see FIG. 1) are formed by the non-heat generating portion H2 because they are not in contact with the contents. In addition, the multiplex part 15 (see FIG. 1) including the folded piece 11 is provided with the heat generating part H1 only on the inner side plates 6 and 7 facing the storage part 16, and the folded piece 11 is formed by the non-heated part H2. The

FIG. 4 is a cross-sectional view showing the layer structure of the blank plate 30. The blank board 30 is provided with a protective layer 34 of a resin film on the inner surface side of the paper layer 31. The paper layer 31 is formed of paperboard. The basis weight of the paper layer 31 is, for example 270~550g / m ^2, more desirably When it is 350~450g / m ^2. On the outer surface of the paper layer 31, a print layer 31a for displaying a pattern is formed by printing.

  The protective layer 34 is formed of, for example, a polyethylene terephthalate resin film, and prevents the contents from bleeding.

  A heat generating layer 33 is formed on predetermined portions (side plates 6 and 7 and bottom plate 5) on the outer surface of the protective layer 34. Thereby, the blank board 30 has the heat generating part H1 in which the heat generating layer 33 is disposed and the non-heat generating part H2 in which the heat generating layer 33 is not formed.

  The heat generating layer 33 is formed of a conductive material that generates heat when irradiated with microwaves. The heat generating layer 33 can be formed by printing on the protective layer 34 with a conductive ink containing a conductive material such as a conductive polymer, conductive carbon, or metal. As the conductive polymer, polyaniline resin, polythiophene resin, polyacetylene resin, or the like can be used.

  Further, the heat generating layer 33 may be formed on the protective layer 34 by a deposited film obtained by depositing a metal such as aluminum. At this time, the heat generating layer 33 may be formed by vapor deposition in an oxygen atmosphere and a vapor deposition film containing a metal (for example, aluminum) and a metal oxide (for example, aluminum oxide).

  It is desirable that the heat generation layer 33 has a resistance value of 0.1 kΩ or more between two arbitrary points 5 mm apart measured by contacting a tester terminal. If a portion having a resistance value smaller than 0.1 kΩ is formed in the heat generating layer 33, there is a risk that sparks may occur during heating by the microwave oven. Further, it is desirable that the heat generating layer 33 has a portion having a resistance value of 50 kΩ or less between two points separated by 5 mm measured by contacting a tester terminal. If the portion having the resistance value of 50 kΩ or less is not formed in the heat generation layer 33, the heat generation amount of the heat generation layer 33 is reduced and heating by radiant heat described later becomes insufficient.

  The protective layer 34 and the paper layer 31 are bonded by dry lamination to form an adhesive layer 32 made of an acrylic adhesive, a urethane adhesive, or the like.

  In the paper container 1 having the above configuration, when the content is, for example, rice, an appropriate amount of water is poured into the storage unit 16 in which the rice is stored, and the lid 4 is closed and cooking is performed by the microwave oven. When cooking is started, the contents are heated by microwaves. Further, the heat generating layer 33 generates heat by microwave irradiation, and the contents are heated from the surroundings by the radiant heat of the heat generating layer 33 disposed in the body 3 and the bottom plate 5. This makes it possible to burn.

  In addition, when the contents are frozen food, the contents are heated by the microwave when cooking by the microwave oven is started. Further, the heat generating layer 33 generates heat by microwave irradiation, and the contents are heated from the surroundings by the radiant heat of the heat generating layer 33 disposed in the body 3 and the bottom plate 5. As a result, a wide range of the contents facing the heat generating layer 33 is dissolved, and the microwaves concentrate on the dissolved water. For this reason, it is heated to the inside of the contents in a short time, cooking time can be shortened and heating unevenness can be prevented.

  During cooking, the heat generating layer 33 is not overlapped in the multiplexing unit 15 because the heat generating unit H1 is provided only on the side plates 6 and 7 disposed in the innermost side facing the storage unit 16. Thereby, ignition by the overheating of the blank board 30 which consists of a laminated body containing the paper layer 31 can be prevented.

  According to the present embodiment, the heat generating portion H <b> 1 in which the heat generating layer 33 that generates heat by microwave irradiation is disposed on the inner surface side of the paper layer 31 is provided on the bottom surface portion 2 and the trunk portion 3. For this reason, the contents are heated by the microwaves and are heated from the surroundings by the radiant heat of the heat generating layer 33. Thereby, while being able to burn a foodstuff, the cooking time of frozen food can be shortened and a heating nonuniformity can be prevented. Further, the heat generating part H1 on the multiplexing unit 15 in which a plurality of laminated blank plates 30 are stacked is provided only on the innermost side plate 6 (laminated body) facing the storage unit 16. For this reason, the exothermic layer 33 is not piled up, and ignition of the blank board 30 by overheating can be prevented. The side plate 7 and the bottom plate 5 are disposed in the innermost surface facing the storage portion 16 because the blank plate 30 is single.

  The heat generating part H1 may be disposed only on one of the bottom surface part 2 and the body part 3. Thereby, the contents can be heated by the radiant heat of the heat generating layer 33 in the same manner as described above. It is more desirable to provide the heat generating part H1 on both the bottom face part 2 and the body part 3 as in the present embodiment because cooking time can be further shortened.

  Moreover, the upper end part of the non-contact trunk | drum 3 and the cover part 4 are formed by the non-heating part H2 at low temperature contents, such as frozen food. For this reason, ignition by the overheating of the upper end part of the trunk | drum 3 and the cover part 4 can be prevented. In addition, the heat generating part H1 having a smaller heat generation amount than the heat generating part H1 below the body part 3 may be arranged on the upper end part of the body part 3 and the lid part 4.

  Further, folding pieces 11 for connecting side plates 6 and 7 erected by bending from each side of the rectangular bottom plate 5 are folded in two and arranged on the outer surface of the side plate 6, by the non-heat generating portion H 2. It is formed. As a result, it is possible to easily realize the multiplex part 15 in which the heat generating part H <b> 1 is disposed only on the innermost side plate 6 facing the storage part 16.

  When the folded piece 11 is not bonded to the side plate 6, the multiple portion 15 is formed by the folded piece 11 folded in half. At this time, since the folded piece 11 does not face the storage portion 16, it is formed by the non-heat generating portion H2. Further, the bottom plate 5 may be formed in a polygon other than a rectangle, and the side plates 6 and 7 that are erected from each side of the bottom plate 5 may be connected by the folding pieces 11.

  In addition, the heat generating layer 33 that generates heat by microwave irradiation can be easily formed by the conductive ink printed on the protective layer 34 of the resin film.

  In addition, the heat generation layer 33 that generates heat by the microwave irradiation can be easily formed by the vapor deposition film containing metal formed on the protective layer 34 of the resin film.

Second Embodiment
Next, FIG. 5 has shown the top view of the blank board 30 of the paper container 1 of 2nd Embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those in the first embodiment shown in FIGS. This embodiment is different from the first embodiment in the arrangement of the heat generating portion H1. Other parts are the same as those in the first embodiment.

  Similar to the first embodiment, the folding piece 11, the upper surface plate 8, the upper surface plate 9, and the upper surface flap 10 are formed by the non-heat generating portion H2.

  The heat generating part H <b> 1 is disposed on the side plate 6, the side plate 7 and the bottom plate 5. In addition, a non-heat generating portion H2 is arranged on the peripheral portion of the surface (side plate 6, side plate 7 and bottom plate 5) on which the heat generating portion H1 is arranged, and the area occupation ratio of the heat generating portion H1 in the peripheral portion becomes zero. Yes.

  As a result, the non-heat generating portion H2 is disposed in the vicinity of the ridgeline at the boundary between the side plate 6, the side plate 7 and the bottom plate 5, and the heat generating layer 33 (see FIG. 4) on the adjacent surface is bent and arranged apart. . For this reason, even if the heat generation amount of the heat generation layer 33 is increased, overheating of the blank plate 30 can be prevented. Therefore, the heat generation layer 33 having a large heat generation amount can be formed, the cooking time of the frozen food can be further shortened, and uneven heating can be further prevented.

  According to this embodiment, the same effect as that of the first embodiment can be obtained. In addition, since the non-heat generating portion H2 is arranged on the periphery of the surface (side plate 6, side plate 7, and bottom plate 5) on which the heat generating portion H1 is provided, the heat generating layer 33 having a large heat generation amount can be formed. Therefore, the cooking time of frozen food can be shortened and uneven heating can be prevented.

<Third Embodiment>
Next, FIG. 6 has shown the top view of the blank board 30 of the paper container 1 of 3rd Embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those in the first embodiment shown in FIGS. This embodiment is different from the first embodiment in the arrangement of the heat generating portion H1. Other parts are the same as those in the first embodiment.

  Similar to the first embodiment, the folding piece 11, the upper surface plate 8, the upper surface plate 9, and the upper surface flap 10 are formed by the non-heat generating portion H2.

  The heat generating part H <b> 1 is disposed on the side plate 6, the side plate 7 and the bottom plate 5. A heat generating part H1 is arranged in the center of the side plates 6 and 7, and a heat generating part H1 and a non-heat generating part H2 are alternately arranged in the lower end part (bottom plate 5 side) and both side end parts. The upper ends of the side plates 6 and 7 (opposite side of the bottom plate 5) are formed by the non-heat generating portion H2. Further, the heat generating part H1 is arranged in the center of the bottom plate 5, and the heat generating part H1 and the non-heat generating part H2 are alternately arranged in the peripheral part. That is, the area occupancy of the heat generating portion H1 in the peripheral portion of the surface (side plate 6, side plate 7, and bottom plate 5) on which the heat generating portion H1 is arranged is smaller than the area occupancy of the central heat generating portion H1.

  Thereby, the non-heat generating part H2 is partially provided in the vicinity of the ridgeline at the boundary between the side plate 6, the side plate 7 and the bottom plate 5, and the heat generating layer 33 (see FIG. 4) in the vicinity of the ridgeline of the adjacent surface is bent. The area is small. For this reason, even if the heat generation amount of the heat generation layer 33 is increased, overheating of the blank plate 30 can be prevented. Therefore, the heat generation layer 33 having a large heat generation amount can be formed, the cooking time of the frozen food can be further shortened, and uneven heating can be further prevented.

  According to this embodiment, the same effect as that of the first embodiment can be obtained. Further, since the area occupancy of the heat generating portion H1 in the peripheral portion of the surface (side plate 6, side plate 7, and bottom plate 5) on which the heat generating portion H1 is arranged is smaller than that in the central portion, the heat generating layer 33 having a large heat generation amount is formed. can do. Therefore, the cooking time of frozen food can be shortened and uneven heating can be prevented.

  In this embodiment, the heat generating layer 33 is formed in a dot shape, the heat generating portion H1 is densely arranged at the center of the side plate 6, the side plate 7 and the bottom plate 5, and the heat generating portion H1 is roughly arranged on the peripheral portion. May be.

  Further, similarly to the first embodiment, the heat generating portion H1 is arranged, and the heat generation amount per unit area of the peripheral portion of the heat generating portion H1 is set to be larger than the heat generation amount per unit area of the central portion in the plane where the heat generating portion H1 is arranged. It may be small. The heat generating portion H1 having a different heat generation amount per unit area can be realized by using conductive materials having different resistance values for the heat generating layer 33, forming the heat generating layer 33 in different thicknesses, or the like.

<Fourth embodiment>
Next, FIG. 7 is a cross-sectional view showing the layer structure of the blank plate 30 of the paper container 1 of the fourth embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those in the first embodiment shown in FIGS. In the present embodiment, a half cut 35 is provided on the paper layer 31. Other parts are the same as those in the first embodiment.

  A large number of half-cuts 35 are provided on the inner surface of the paper layer 31. The half cut 35 is provided in the heat generating part H1, and the half cut 35 is not formed in the non-heat generating part H2.

  A large number of minute recesses are formed facing the heat generating layer 33 by the half cut 35. For this reason, when the heat generating layer 33 generates heat, the residual moisture of the paper layer 31 escapes to the minute concave portion formed of the half cut 35, and the bubbling of the paper layer 31 can be prevented. Note that the minute recesses on the inner surface of the paper layer 31 may be formed by embossing or the like.

  According to this embodiment, since the heat generating portion H1 has a large number of minute recesses formed on the inner surface of the paper layer 31, bubbling of the paper layer 31 can be prevented when the heat generating layer 33 generates heat. In addition, you may provide the same half cut 35 (micro recessed part) in the paper container 1 of 2nd, 3rd embodiment.

  In the first to fourth embodiments, when the contents can be sufficiently heated by the heat generating portion H1 of the body portion 3, the entire bottom surface portion 2 may be formed by the non-heat generating portion H2. Further, when the contents can be sufficiently heated by the heat generating portion H1 of the bottom surface portion 2, the entire body portion 3 may be formed by the non-heat generating portion H2.

  In addition, although the bottom surface portion 2 is formed by one bottom surface plate 5, the bottom surface portion 2 may be formed by a plurality of bottom surface plates. At this time, the portion where the plurality of bottom plates overlap forms the multiplex portion 15, and the heat generating portion H1 on the multiplex portion 15 is provided only in the innermost laminate.

  Further, the cylindrical body part 3 may be formed by bending the laminated body in an annular shape and bonding both ends in the circumferential direction. At this time, the adhesion region on the body 3 forms a multiplex part 15 in which the laminates are stacked, and the heat generating part H1 on the multiplex part 15 is provided only in the innermost laminate.

  ADVANTAGE OF THE INVENTION According to this invention, it can utilize for the microwave oven heating paper container which accommodates frozen food and the food which burns, and is heated with a microwave oven.

1 Microwave heating paper container (paper container)
2 Bottom surface portion 3 Body portion 4 Lid portion 5 Bottom surface plate 6, 7 Side surface plate 8, 9 Top surface plate 10 Upper surface flap 11 Folding piece 15 Multiplexing portion 16 Storage portion 20, 20a Folding line 30 Blank plate 31 Paper layer 31a Print layer 32 Adhesion Layer 33 Heat generation layer 34 Protective layer 35 Half cut H1 Heat generation part H2 Non-heat generation part

Claims (10)

  A cylindrical body portion, a bottom surface portion that closes a lower surface of the body portion, and a bottomed cylindrical storage portion that is formed by the body portion and the bottom surface portion, and is formed by a laminate including a paper layer. In the microwave heating paper container, the laminated body has a heat generating portion in which a heat generating layer that generates heat by microwave irradiation is disposed on the inner surface side of the paper layer, and a non-heat generating portion in which the heat generating layer is not formed, The microwave heating paper container, wherein the heat generating part is arranged only in the innermost laminated body facing the storage part and is arranged in at least one of the bottom part and the body part.   2. The microwave heating paper container according to claim 1, wherein the heat generating part is disposed on the bottom part and the body part.   The microwave heating according to claim 1, further comprising: a lid portion that opens and closes an upper surface of the trunk portion, wherein the upper end portion of the trunk portion and the lid portion are formed by the non-heat generating portion. Paper container.   The laminated body connects the polygonal bottom surface plate forming the bottom surface portion, a plurality of side surface plates that are bent from each side of the bottom surface plate to form the body portion, and the adjacent side surface plates. And a plurality of folding pieces arranged on the outer surface of the side plate by folding on a fold line extending from the apex of the bottom plate, wherein the folding piece is formed by the non-heat generating portion. The microwave oven paper container according to any one of claims 1 to 3.   The laminated body includes a polygonal bottom plate that forms the bottom surface portion, and a plurality of side plates that are bent from each side of the bottom plate to form the body portion, and the heat generating portion is arranged. 4. The microwave heating paper according to claim 1, wherein an area occupancy ratio of the heat generating portion in a peripheral portion of the surface is smaller than an area occupancy ratio of the heat generating portion in a central portion. 5. container.   The microwave heating paper container according to claim 5, wherein a peripheral portion of a surface on which the heat generating portion is disposed is formed by the non-heat generating portion.   The laminated body includes a polygonal bottom plate that forms the bottom surface portion, and a plurality of side plates that are bent from each side of the bottom plate to form the body portion, and the heat generating portion is arranged. The calorific value per unit area of the heat generating part in the peripheral part of the surface formed is smaller than the calorific value per unit area of the heat generating part in the center part. The microwave heating paper container as described.   The microwave oven container according to any one of claims 1 to 7, wherein the heat generating portion has a large number of minute recesses formed on an inner surface of the paper layer.   9. The laminate according to claim 1, wherein the laminate has a protective layer of a resin film disposed on the inner surface, and the heat generating layer is made of conductive ink printed on the protective layer. The microwave oven paper container according to Crab.   9. The laminate according to claim 1, wherein the laminate includes a protective layer of a resin film disposed on an inner surface, and the heat generating layer is formed of a vapor deposition film containing a metal formed on the protective layer. The microwave oven paper container in any one.

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