JP6746380B2 - Microwave container - Google Patents

Description

TECHNICAL FIELD The present invention relates to a container for a microwave oven, which contains contents to be heated by a microwave oven.

Conventionally, various techniques have been proposed as a container for storing contents to be heated by a microwave oven. For example, as a container for a microwave oven, a technique is known in which a heating element that generates heat by absorbing microwaves is laminated on a lid provided on a cup-shaped container body (for example, Patent Document 1 and Patent Document 1). 2). In such a microwave oven container, when the contents are heated by the microwave oven, the heat of the heating element melts the resin of the seal layer to reduce the seal strength, thereby improving the openability.

In addition, a technique is also known in which a heating element is provided in a portion of the container body that comes into contact with the content, and when the content is heated by a microwave oven, the content that comes into contact with the heating element is cooked (for example, Patent Literature 3 and Patent Document 4).

JP, 2013-6607, A JP, 2013-203447, A JP 2001-322684 A JP 2012-165841 A

The microwave oven container described above has the following problems. That is, if heating elements are provided on both the container body and the lid in order to improve the unsealing property of the lid and to make the contents into a cookable container, there is a problem that the manufacturing cost increases. In particular, such a container is often discarded after the contents are heated and used, and it is required to reduce the manufacturing cost.

For example, it is conceivable that a heating element is provided only on the lid and the lid is placed below to heat the contents in a microwave oven.

However, when the internal pressure of the container rises due to heating, the internal pressure may escape from a part of the sealing surface of the container body and the lid due to the pressure, and the liquid component of the contents may flow out of the container from the relevant part. When the liquid component of the contents flows out of the container, there is a problem of polluting the microwave oven.

Therefore, the present invention provides a container for a microwave oven capable of improving the unsealing property of a lid by heating a microwave oven, cooking the contents, and preventing leakage of a liquid component of the contents at the time of heating. With the goal.

In order to solve the above problems and achieve the object, the microwave oven container of the present invention is configured as follows.

As an aspect of the present invention, a microwave container is a container body having a bottom portion, a cylindrical body portion provided on the bottom portion, and a flange portion provided on an outer peripheral edge of an opening end of the body portion, and an outer surface side. toward the flange portion side from the order, base layer, has a sealing layer having a heat generating layer and the container main body to generate heat by absorbing electromagnetic wave adhesiveness, the sealing layer is adhered to the flange portion, the end A lid body for sealing the container body, the entire circumference of the portion being formed in a dish shape projecting from the outer peripheral edge of the flange portion to the bottom side of the container body, wherein the flange portion is the body portion. From the flat portion that extends outward from, and a protruding portion that protrudes from the outer peripheral edge of the flat portion to the bottom portion side, the lid body is adhered to the flat portion and the protruding portion, the heating layer, The lid is arranged in a range from the flange portion toward the center of the lid, the food containing a liquid component is stored therein, and the lid is arranged in a microwave oven in a posture in which the lid faces downward.

According to the present invention, there is provided a container for a microwave oven capable of improving the unsealing property of a lid by heating a microwave oven, cooking the contents, and preventing leakage of a liquid component of the contents at the time of heating. Is possible.

The perspective view which shows the structure of the container for microwave ovens which concerns on the 1st Embodiment of this invention. Sectional perspective view which shows the structure of the container for microwave ovens. The top view which shows the structure of the container for microwave ovens. Sectional drawing which shows the structure of the same container for microwave ovens. Sectional drawing which shows the structure of the cover body used for the same container for microwave ovens. Sectional drawing which shows the structure of the container for microwave ovens which concerns on the 2nd Embodiment of this invention. Sectional drawing which shows the structure of the container for microwave ovens which concerns on the 3rd Embodiment of this invention. Sectional drawing which shows the structure of the container for microwave ovens which concerns on the 4th Embodiment of this invention. Sectional drawing which shows the structure of the container for microwave ovens which concerns on the 5th Embodiment of this invention. Sectional drawing which shows the structure of the container for microwave ovens which concerns on the 6th Embodiment of this invention. Sectional drawing which shows the structure of the lid of the container for microwave ovens which concerns on the modification of this invention.

(First embodiment)
Hereinafter, the configuration of the microwave oven container 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 5.
FIG. 1 is a perspective view showing the configuration of a microwave oven container 1 according to a first embodiment of the present invention, FIG. 2 is a cross-sectional perspective view showing the configuration of the microwave oven container 1, and FIG. 3 is a microwave oven container. 1 is a plan view showing the configuration of FIG. 1, FIG. 4 is a sectional view showing the configuration of the microwave oven container 1, and FIG. 5 is a sectional view showing the configuration of a lid 12 used in the microwave oven container 1.

As shown in FIGS. 1 to 4, the microwave oven container 1 includes a container body 11 and a lid 12. In the microwave oven container 1, the contents 100 are contained in an internal space formed by the container body 11 and the lid 12. Moreover, the container 1 for microwave ovens is arrange|positioned in the microwave oven with the lid body 12 facing downward when the contents 100 are heated, and is heated. Here, the contents 100 are foods such as dumplings, sushi, grilled fish, grilled meat, and hamburgers.

The container body 11 has a bottomed tubular shape such as a dish shape, a bowl shape, and a cup shape. The container body 11 includes a plate-shaped bottom portion 21, a tubular body portion 22 extending from a peripheral portion of the bottom portion 21, and a flange portion 23 provided at an open end of the body portion 22.

The container body 11 is configured by molding a resin material such as an olefin resin such as polypropylene or polyethylene or a polyester resin such as polyethylene terephthalate by pressure molding or injection molding.

The bottom portion 21 is formed in a rectangular plate shape or a circular plate shape. In the present embodiment, the bottom portion 21 will be described using an example of a rectangular plate shape. The body portion 22 is formed in a cylindrical shape continuously provided on the outer peripheral portion of the bottom portion 21.

The flange portion 23 extends outward from the outer peripheral edge of the open end of the body portion 22. The flange portion 23 is located on the bottom surface of the microwave oven in the state where the microwave oven container 1 is placed in the microwave oven, and is a flat portion 23a extending in the horizontal direction in this state, and an outer peripheral portion of the flat portion 23a. And a projecting portion 23b projecting toward the bottom portion 21 side. The protruding portion 23b is curved from the flat surface portion 23a to a predetermined curvature and protrudes toward the bottom portion 21 side. In other words, the flange portion 23 is configured to have a planar shape and the outer peripheral edge thereof is curved.

The lid 12 hermetically adheres to the flat surface portion 23 a of the flange portion 23 to seal the container body 11 in which the content 100 is stored. The lid 12 is configured in a dish shape whose end extends from the flat surface portion 23 a of the flange portion 23 to the bottom portion 21 side of the container body 11. The lid 12 is bonded to the flange portion 23 by heat. In other words, the lid body 12 is heat-sealed to the flange portion 23 of the container body 11.

The lid 12 is a dish-shaped sheet made of a laminated material made of a plurality of materials. Specifically, as shown in FIG. 5, the lid 12 includes a base layer 31, a heating element layer 32, and a sealing layer that are integrally laminated in order from the outer surface side to the side bonded to the flange portion 23. 33 is provided. The sealing layer 33 of the lid 12 is bonded to the flange portion 23.

In the present embodiment, in the lid 12, the base material layer 31 is a printed film, the heating element layer 32 is a heating film, and the sealing layer 33 is a sealing layer coating film. Further, the lid 12 has an adhesive layer 34 between the base material layer 31, the heating element layer 32, and the seal layer 33.

The base material layer 31 is made of a resin film, a paper material, or the like. For example, the base material layer 31 includes a PET film 41 that is a base material, and a gravure printing layer 42 in which information or the like of the content 100 is printed on one surface of the PET film 41 by gravure printing.

The base material of the base material layer 31 may be a resin film other than the PET film 41. For example, a polyester resin such as polyethylene terephthalate or a thermoplastic resin film such as polyamide resin such as nylon 6 is suitable. Can be used for

The heating element layer 32 is composed of a vapor deposition film of a conductive substance that generates heat by absorbing microwaves that are electromagnetic waves, a conductive ink, a thin film of a metal foil, or the like. Here, as the conductive substance, a metal such as aluminum, tin, zinc, iron, and copper, or one or a mixture of two or more oxides of these metals can be used.

The heating element layer 32 includes a PET film 51 as a base material, a metal vapor deposition film 52 provided on one surface of the PET film 51, and a protective layer 53 provided on one surface of the metal vapor deposition film 52.

The metal vapor deposition film 52 is formed into a film by metal vapor deposition on the surface of the PET film 51, for example, a mixture of aluminum and aluminum oxide. The area, shape, thickness, etc. of the metal vapor deposition film 52 are appropriately set according to the amount of heat generated by the lid 12 when the contents 100 are heated by a microwave oven.

For example, as the material of the metal vapor deposition film 52, it is preferable to use a vapor deposition film of aluminum alone or a mixture of aluminum and aluminum oxide in view of material cost and productivity. When the mixture is used as the material of the metal vapor deposition film 52, the mass ratio of aluminum and aluminum oxide is more preferably 4:1 to 1:9. The metal vapor deposition film 52 preferably has a thickness of 30 to 100 nm.

As shown in FIGS. 3 and 5, the metal vapor deposition film 52 is patterned in a grid pattern, so that a plurality of rectangular heating elements 52a are arranged at equal intervals. When the body 22 of the container body 11 has a rectangular tubular shape, the plurality of heat generating elements 52a are aligned with one side of the body 22 that extends linearly when the lid 12 is bonded to the container body 11. Are arranged so as to line up in the direction of inclination. In other words, the missing portion of the heating element layer 32 where the heating element 52a is not formed is formed in a lattice shape that extends at least obliquely with respect to the linearly extending extension direction of the flange portion 23. There is.

The metal vapor deposition film 52 controls the heat generation temperature of the heating element 52a by dividing the heating elements 52a into a predetermined size. Specifically, the temperature of heat generated by the heating element 52a is higher than the temperature at which the sealing surface with the container body 11 is melted, in other words, is higher than the melting point of the sealing layer 33, and the lid 12 is damaged by heat. The heating element 52a is controlled by setting the shape and interval of the heating element 52a so that the temperature does not rise.

The metal vapor deposition film 52 has a function of causing each heating element 52a to generate heat when the heating element 52a absorbs microwaves when the contents 100 are heated by a microwave oven.

The protective layer 53 is composed of vinyl chloride acetate resin or the like. The heating element layer 32 is provided with the adhesive layer 34 from the surface on the protective layer 53 side, so that the protective layer 53 and the PET film 51 on which the metal vapor deposition film 52 and the protective layer 53 are not adhered. Covered by layer 34.

Such a metal vapor deposition film 52 is formed by forming a metal vapor deposition film on the entire surface of the PET film 51, and forming a partially acid-resistant or alkali-resistant protective layer 53 on a portion where the vapor-deposited film is removed, It is configured by cleaning and removing the portion other than the portion covered with the protective layer 53 with an acid or an alkali.

The seal layer 33 is formed of a coating film or film mainly composed of a thermoplastic resin having a relatively low melting point. A PET film 61 serving as a base material, an inorganic vapor deposition film 62 obtained by vapor-depositing silica or alumina on the PET film 61, and a coating layer 63 including a coating film mainly composed of a thermoplastic resin provided on the inorganic vapor deposition film 62. And.

The inorganic vapor deposition film 62 improves the adhesion between the PET film 61 and the coating film layer 63. The inorganic vapor deposition film 62 is composed of a non-conductive substance that does not generate heat when heated in a microwave oven.

The coating film layer 63 is formed of a coating film mainly composed of a thermoplastic resin. The coating used for the coating layer 63 is, for example, a coating in which fine particles of a thermoplastic resin are dispersed in a solvent is applied to the PET film 61, and the coating is heated and baked to melt the resin in the coating, It is formed as a thin film coating film.

As the thermoplastic resin forming the coating film of the coating layer 63, an olefin resin such as polypropylene or polyethylene or a polyester resin such as polyethylene terephthalate can be preferably used. Further, the melting point of the thermoplastic resin forming the coating film of the coating layer 63 is preferably in the range of 130 to 250°C. The seal layer 33 is adhered to the flat surface portion 23a of the flange portion 23, which is the edge surface of the container body 11, by heat sealing or the like. The thickness of the seal layer 33 is preferably set in the range of 1 to 15 μm.

The adhesive layer 34 is preferably composed mainly of an adhesive thermosetting resin. For example, for the adhesive layer 34, an adhesive resin material made of a resin composition containing a resin such as an epoxy resin, a polyester resin, a copolymer resin of epoxy and polyester as a main component and a curing agent such as a melamine resin or an isocyanate resin can be used. ..

The microwave oven container 1 configured as described above is arranged in the microwave oven so that the lid 12 faces downward when the content 100 is heated in the microwave oven. As a result, the content 100 is placed in the microwave oven container 1 so as to contact the inner surface of the lid 12. Further, when the contents 100 are heated in the microwave oven, the heating element 52a absorbs microwaves and generates heat.

As a result, the content 100 is directly heated by the microwave of the microwave oven, and the position where it comes into contact with the lid 12 is heated and cooked by the heating element 52a that has generated heat.

Further, the heating element 52a located on the flange portion 23 generates heat, so that the seal layer 33 is heated and the coating layer 63 of the seal layer 33 is melted. As a result, the sealing strength of the portion of the lid 12 where the heating element 52a is provided is reduced, and the unsealing property of the lid 12 is improved.

In addition, the heating element layer 32 has a configuration in which the heating elements 52a are provided with a predetermined interval, in other words, a configuration in which there is a missing portion in which the metal vapor deposition film 52 that generates heat is not disposed between the plurality of heating elements 52a. .. Further, the lid 12 is heat-sealed to the flange portion 23 such that the extending direction of the missing portion of the heat generating layer 32 is inclined with respect to the linear extending direction of the flange portion 23.

With such a configuration, when the content 100 is heated by the microwave oven, a portion having a high seal strength and a portion having a low seal strength are alternately present between the lid body 12 and the flange portion 23. As a result, it is possible to prevent the lid 12 as a whole from peeling off from the flange 23 after the contents 100 are heated by the microwave oven.

As a result, after heating the contents 100 in the microwave oven, when the container body 11 is gripped and the microwave oven container 1 is lifted, the lid 12 is peeled off from the flange portion 23, and the contents 100 may drop. Can be suppressed.

Further, the end portion of the lid body 12 is configured in a dish shape extending from the flat surface portion 23 a of the flange portion 23 to the bottom portion 21 side of the container body 11. Therefore, when the contents 100 are heated in the microwave oven, the internal pressure of the microwave oven container 1 rises, and either the lid 12 or the flange portion 23 is peeled off, and the internal pressure escapes from the peeled portion. Even in such a case, the liquid component of the content 100 that has moved to the outside of the container body 11 from the site is blocked by the end of the lid 12. As a result, the liquid component of the content 100 can be prevented from flowing out into the microwave oven, and the microwave oven is not polluted.

Further, the microwave oven container 1 has a configuration in which the lid 12 is arranged downward in the direction of gravity when heated. For this reason, the heating element 52a may be provided only on the lid 12, and even if it is possible to improve the unsealing property of the lid 12 by heating with a microwave oven and cook the contents 100, It is possible to prevent the manufacturing cost from increasing.

As described above, according to the microwave oven container 1 of the first embodiment of the present invention, it is possible to improve the unsealing property of the lid body 12 by heating the microwave oven, and at the same time, to cook the contents 100, and at the time of heating. It is possible to prevent the liquid component of the contents 100 from leaking out.

(Second embodiment)
Next, a microwave oven container 1A according to a second embodiment of the present invention will be described with reference to FIG.
FIG. 6 is a cross-sectional view showing the configuration of the microwave oven container 1A. In the configuration of the microwave oven container 1A according to the second embodiment, the same components as those of the microwave oven container 1 according to the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 6, the microwave oven container 1A includes a container body 11 and a lid 12. The lid 12 of the microwave oven container 1A is configured to be bonded to the outer surface of the projecting portion 23b in addition to the flat surface portion 23a of the flange portion 23 of the container body 11. That is, while the microwave container 1 according to the first embodiment has a configuration in which the lid 12 is bonded only to the flat surface portion 23a of the flange portion 23, the microwave container according to the second embodiment is provided. 1A has a configuration in which the lid body 12 is bonded to the flat surface portion 23a and the protruding portion 23b of the flange portion 23.

The microwave oven container 1A configured in this manner improves the unsealing property of the lid body 12 by heating the microwave oven and can cook the contents 100 and heats the same as the microwave oven container 1 described above. It is possible to prevent the liquid component of the contents 100 from leaking out.

(Third Embodiment)
Next, a microwave oven container 1B according to a third embodiment of the present invention will be described with reference to FIG.
FIG. 7: is sectional drawing which shows the structure of the container 1B for microwave ovens. In addition, in the configuration of the microwave oven container 1B according to the third embodiment, the same configurations as the microwave oven container 1 according to the first embodiment and the microwave oven container 1A according to the second embodiment are the same. Reference numerals are given and detailed description thereof is omitted.

As shown in FIG. 7, the microwave oven container 1B includes a container body 11 and a lid 12B. In the microwave oven container 1B, the content 100 is housed in an internal space composed of the container body 11 and the lid 12B. Moreover, the container 1B for microwave ovens is arrange|positioned in the microwave oven with the lid body 12 facing downward when the contents 100 are heated, and is heated.

The lid 12B is adhered to the flat surface portion 23a and the protruding portion 23b of the flange portion 23, and the ridge portions of the bottom portion 21 and the body portion 22. Specifically, the lid 12B is configured in a bowl shape whose end extends from the flat surface portion 23a of the flange portion 23 to the bottom portion 21 of the container body 11 and the ridge portion of the body portion 22. The lid 12B is bonded to the flange portion 23 and the ridge portions of the bottom portion 21 and the body portion 22 by heat. In other words, the lid 12B is heat-sealed to the flat surface portion 23a and the protruding portion 23b of the flange portion 23 of the container body 11, and the ridge portions of the bottom portion 21 and the body portion 22.

Like the lids 12 and 12A, the lid 12B includes a base layer 31, a heating element layer 32, and a seal layer 33 that are integrally laminated in order from the outer surface side to the side bonded to the flange portion 23. ing.

The microwave oven container 1B configured in this manner improves the unsealing property of the lid 12 by heating in a microwave oven and can cook the contents 100, like the microwave oven containers 1 and 1A described above, and Further, it is possible to prevent leakage of the liquid component of the content 100 during heating. Further, in the microwave oven container 1B, since the lid body 12B is provided up to the bottom portion 21 of the container body 11 and the ridge portion of the body portion 22, it is possible to reliably block the liquid component of the content 100 during heating. ..

(Fourth Embodiment)
Next, a microwave oven container 1C according to a fourth embodiment of the present invention will be described with reference to FIG.
FIG. 8: is sectional drawing which shows the structure of the container 1C for microwave ovens. In addition, in the configuration of the microwave oven container 1C according to the fourth embodiment, the same components as those of the microwave oven containers 1, 1A, 1B according to the above-described embodiments are denoted by the same reference numerals, and detailed description thereof will be given. Omit it.

As shown in FIG. 8, the microwave oven container 1C includes a container body 11 and a lid 12C. In the microwave oven container 1C, the content 100 is housed in the container body 11 and in the internal space formed by the lid 12C. When the contents 100 are heated, the microwave oven container 1C is placed in the microwave oven with the lid 12 facing downward and heated.

12 C of lid bodies are adhere|attached on the plane part 23a and the protrusion part 23b of the flange part 23, and the ridge part of the bottom part 21 and the trunk|drum 22. Specifically, 12 C of lids are comprised by the edge part from the plane part 23a of the flange part 23 to the bowl-shaped extending from the main surface center side of the bottom part 21 of the container main body 11. The lid 12C is bonded to the flange 23 and the bottom 21 by heat. In other words, the lid 12C is heat-sealed to the flat surface portion 23a and the protruding portion 23b of the flange portion 23 of the container body 11 and the main surface of the bottom portion 21.

Like the lids 12, 12A, and 12B, the lid 12C has a base layer 31, a heating element layer 32, and a sealing layer 33 that are integrally laminated in order from the outer surface side to the side bonded to the flange portion 23. Equipped with.

The microwave oven container 1C configured as described above, like the microwave oven containers 1, 1A, and 1B described above, improves the unsealing property of the lid 12 by heating in a microwave oven and enables cooking of the contents 100. Moreover, it is possible to prevent leakage of the liquid components of the content 100 during heating. Further, since the lid 12C is provided up to the bottom portion 21 of the container body 11 in the microwave oven container 1C, it is possible to reliably block the liquid component of the content 100 during heating, similarly to the microwave oven container 1B. Becomes

(Fifth Embodiment)
Next, a microwave oven container 1D according to a fifth embodiment of the present invention will be described with reference to FIG.
FIG. 9: is sectional drawing which shows the structure of the container 1D for microwave ovens. In the configuration of the microwave oven container 1D according to the fifth embodiment, the same components as those of the microwave oven containers 1, 1A, 1B, 1C according to the above-described embodiments are denoted by the same reference numerals, and detailed description thereof will be given. The description is omitted.

As shown in FIG. 9, the microwave oven container 1D includes a container body 11 and a lid 12D. In the microwave oven container 1D, the contents 100 are housed in the container body 11 and the internal space formed by the lid 12D. Further, when the contents 100 are heated, the microwave oven container 1D is placed in the microwave oven with the lid 12 facing downward and heated.

The lid 12D is adhered to the flat surface portion 23a and the protruding portion 23b of the flange portion 23, and the bottom portion 21, and at the bottom portion 21, the end portions are laminated. Specifically, the lid 12D is configured such that its end portion extends from the flat surface portion 23a of the flange portion 23 beyond the center of the main surface of the bottom portion 21 of the container body 11, and the end portion of the lid body 12D has the main portion of the bottom portion 21. Stacked in the center of the plane. The lid 12D is bonded to the flange portion 23 and the bottom portion 21 by heat, and the ends thereof are bonded to each other. In other words, the lid 12D is heat-sealed on the flat surface portion 23a and the protruding portion 23b of the flange portion 23 of the container body 11 and the main surface of the bottom portion 21.

Like the lids 12, 12A, 12B, and 12C, the lid 12D has a base material layer 31, an exothermic body layer 32, and a seal that are integrally laminated in order from the outer surface side to the side bonded to the flange portion 23. The layer 33 is provided.

The microwave oven container 1D configured in this manner improves the unsealing property of the lid 12 by heating the microwave oven and cooks the contents 100 in the same manner as the microwave oven containers 1, 1A, 1B, and 1C described above. It is possible to prevent leakage of the liquid component of the content 100 during heating. Further, since the microwave container 1D is provided by laminating the end portion of the lid 12D in the center of the bottom portion 21 of the container body 11 and adhering by heat sealing, the microwave container 1B and 1C are provided. Similarly, it becomes possible to reliably block the liquid component of the content 100 during heating.

(Sixth Embodiment)
Next, a microwave oven container 1E according to a sixth embodiment of the present invention will be described with reference to FIG.
FIG. 10: is sectional drawing which shows the structure of the container 1D for microwave ovens. In addition, in the configuration of the microwave oven container 1E according to the sixth embodiment, the same components as those of the microwave oven containers 1, 1A, 1B, 1C, 1D according to the above-described embodiments are designated by the same reference numerals, and Detailed description is omitted.

As shown in FIG. 10, the microwave oven container 1E includes a container body 11, a lid 12E, and a cover 13 that covers the lid 12.

The lid 12E is formed in a rectangular sheet shape and is bonded to the flat surface portion 23a of the flange portion 23. The lid 12E is bonded to the flange portion 23 by heat. In other words, the lid 12E is heat-sealed to the flange portion 23 of the container body 11.

Like the lids 12, 12A, 12B, 12C, and 12D, the lid 12E has a base material layer 31 and a heating element layer 32 that are integrally laminated in order from the outer surface side to the side bonded to the flange portion 23. And a seal layer 33.

The cover 13 is an overcap made of a resin material and covering the lid 12E. The cover 13 is formed in a dish shape with its peripheral edge protruding. In the state where the cover 13 covers the lid body 12, the peripheral edge portion projects toward the bottom portion 21 side of the container body 11, and covers the periphery of the lid portion 12E and the seal portion of the flange portion 23. The cover 13 is configured to have higher rigidity than the lid body 12E by means such as making the thickness thicker than the lid body 12E.

According to the microwave oven container 1E configured as described above, the lid 12E is bonded to the flange portion 23, so that the heating element layer 32 of the lid 12E is heated by the microwave heating, and the sealing layer 33 is coated. By melting the film layer 63, it is possible to improve the unsealing property of the lid 12E and cook the contents 100.

Further, the microwave oven container 1E has a configuration in which the periphery of the lid 12E and the seal portion of the flange portion 23 is covered by the cover 13 configured in a dish shape. With this configuration, when the contents 100 are heated by the microwave oven, the internal pressure of the microwave oven container 1 rises, and either the lid 12 or the flange portion 23 is peeled off and the internal pressure escapes. Also, the liquid component of the content 100 that has moved to the outside of the container body 11 from the site is blocked by the peripheral edge of the cover 13. As a result, the microwave oven container 1E can prevent the content 100 from leaking when heated by the microwave oven.

The present invention is not limited to the above embodiment. In the above-described example, the lids 12, 12A, 12B, 12C, 12D, 12E have the configuration in which the plurality of heating elements 52a having the same shape are arranged at equal intervals in the heating element layer 32, but the present invention is not limited thereto. Not done. That is, the heating element layer 32 may be configured to include a plurality of heating elements having different shapes.

For example, like the lid 12F of the microwave oven container 1F according to the modification of the present invention shown in FIG. 11, the heating element layer 32 of the lid 12F reduces the seal strength when the contents 100 is heated by the microwave. However, a configuration may be adopted in which a plurality of first heating elements 52a that improve the unsealing property of the lid 12F and a plurality of second heating elements 52b that cook the contents 100 during heating are provided. Specifically, the first heating element 52a is arranged around the flange portion 23, and the second heating element 52b is arranged closer to the center side of the lid 12F than the flange portion 23. The second heating element 52b has a larger area than the first heating element 52a. With such a configuration, the lid 12F has a larger amount of heat generation in the second heating element 52b than in the first heating element 52a.

With such a configuration, the lid 12F causes the first heating element 52a to generate heat enough to improve the unsealing property, and the second heating element 52b generates higher heat than the first heating element 52a. It is possible to generate and cook the contents 100. Also, for example, the shape of the second heating element 52b makes it possible to give the contents 100 a brown mesh or the like.

In addition, in the above-described example, the lid bodies 12, 12A, 12B, 12C, 12D, 12E, and 12F have the base material layer 31, the heating element layer 32, and the seal in order from the outer surface side to the side bonded to the flange portion 23. Although the configuration in which the layers 33 are integrally laminated has been described, the present invention is not limited to this.

For example, the lid body may not have the base material layer 31 and may have only the heating element layer 32 and the seal layer 33. Further, the lid body may not have the PET films of the base material layer 31 and the heating element layer 32, and may have a configuration in which the heating element 52 and the protective layer 53 are provided on the seal layer 33. That is, the lids 12, 12A, 12B, 12C, 12D, 12E, and 12F can improve the unsealing property of the lid 12 by heating the heating element 52 by the microwave heating, and the contents 100 If it is a structure that can be cooked, it can be appropriately used. Besides, various modifications can be made without departing from the scope of the present invention.
The contents equivalent to the invention described in the initial claims of the present application will be additionally described below.
[1] A container body having a bottom portion, a tubular body portion provided on the bottom portion, and a flange portion provided on an outer peripheral edge of an opening end of the body portion,
Having a heat-generating layer that absorbs electromagnetic waves and generates heat, and a sealing layer having adhesiveness with the container body, adhered to the flange portion, and projecting from the outer peripheral edge of the flange portion to the bottom side of the container body, A lid for sealing the container body,
A container for a microwave oven, comprising:
[2] The flange portion includes a flat portion that extends outward from the body portion, and a protruding portion that protrudes from the outer peripheral edge of the flat portion toward the bottom portion,
The container for a microwave oven according to [1], wherein the lid is adhered to the flat surface portion and the protruding portion.
[3] The container for a microwave oven according to [1] or [2], wherein the lid extends to the bottom.
[4] The heat generating layer is disposed on the center side of the lid body with respect to the first heat generating element arranged in the periphery of the flange portion, and has a larger heat generation amount than the first heat generating element. 2. A microwave oven container according to [1], which comprises two heating elements.

1-1F... Microwave oven container, 11... Container main body, 12-12F... Lid body, 13... Cover, 21... Bottom part, 22... Body part, 23... Flange part, 23a... Plane part, 23b... Projection part, 31 ... Base material layer, 32... Heating element layer, 33... Sealing layer, 34... Adhesive layer, 41... PET film, 42... Gravure printing layer, 51... PET film, 52... Metal deposition film, 52a... Heating element (first Heating element), 52b... second heating element, 53... protective layer, 61... PET film, 62... inorganic deposition film, 63... coating layer, 100... contents.

Claims (3)

A container body having a bottom portion, a tubular body portion provided on the bottom portion, and a flange portion provided on the outer peripheral edge of the opening end of the body portion;
In order from the outer surface side to the flange portion side, a base material layer, a heat generating layer that absorbs electromagnetic waves to generate heat, and a sealing layer having adhesiveness with the container body are provided, and the sealing layer is bonded to the flange portion. A lid body for sealing the container body, the entire circumference of the end portion being configured in a dish shape projecting from the outer peripheral edge of the flange portion to the bottom side of the container body,
Equipped with
The flange portion has a flat portion that extends outward from the body portion, and a protruding portion that protrudes from the outer peripheral edge of the flat portion to the bottom portion side,
The lid is adhered to the flat surface portion and the protruding portion,
The heat generating layer is arranged in a range from the flange portion to the center side of the lid,
A container for a microwave oven , which accommodates a food containing a liquid component, and is arranged in the microwave oven with the lid facing downward. The container for a microwave oven according to claim 1, wherein the lid extends to the bottom. The heat generating layer is disposed on the periphery of the flange portion, and the second heat generating element is disposed closer to the center of the lid than the flange portion and has a larger heat generation amount than the first heat generating element. The container for a microwave oven according to claim 1, further comprising: