Microwave packaging container capable of selective temperature control by zone

Abstract

Provided are a microwave food container and packaging capable of selective temperature control. The microwave packaging container capable of selective temperature control, according to an embodiment of the present invention, comprises: a container body that has a space formed therein for accommodating food and includes an electromagnetic wave shielding control material; and an electromagnetic wave shielding part that covers at least a portion of the container body and includes an electromagnetic wave shielding control material, wherein the electromagnetic wave shielding part is provided as a sealing sheet, a package, or a combination thereof, and is configured such that electromagnetic wave shielding rates differ by zone, so that food in respective zones can be heated to different temperatures.

Description

Microwave packaging container capable of selective temperature control by zone

[0001] The present invention relates to a food container and packaging for a microwave oven capable of selective temperature control by zone, and more specifically, to a packaging container for a microwave oven capable of selective temperature control by zone, which can simultaneously achieve reduced packaging material usage and improved user convenience while securing the optimal consumption temperature for each food by controlling the blocking rate of the electromagnetic shielding part differently by zone during the process of heating food in a microwave oven, thereby enabling simultaneous heating of food in each partitioned zone to different temperatures.

[0002]

[0003] Recently, microwaveable instant foods and meal kits have gained popularity; however, conventional microwave containers have the problem of being unable to simultaneously heat multiple foods with different temperature requirements to an optimal state. Since microwaveable instant foods are typically designed to be cooked all at once in a single container, the cooking time is set based on foods that take a long time to cook. Consequently, some foods are overheated, resulting in a failure to achieve the optimal texture.

[0004] In particular, despite the fact that the optimal consumption temperature varies by food—such as 65°C for rice, 55°C for meat, 20°C for sauces, 10°C for seasoned vegetables, and 8°C for kimchi—heating must be set to the highest temperature in a single container. Consequently, foods that should be consumed cold are heated together, leading to a loss of flavor and nutrients. Furthermore, separating each food item into separate containers to address this issue causes environmental problems due to increased packaging material usage, as well as issues such as extended cooking times, increased energy consumption, and reduced user convenience resulting from individual heating.

[0005] Therefore, there is a need for microwave packaging containers that can heat multiple foods simultaneously at different temperatures within a single container, thereby reducing packaging material usage and improving user convenience and energy efficiency. Existing microwave packaging technologies have focused solely on the inclusion of simple heating elements or uniform heating, and technology capable of selective temperature control for each zone within a single container has not yet been developed.

[0006]

[0007] In order to solve the problems of the conventional technology described above, one embodiment of the present invention aims to provide a microwave oven packaging container capable of selective temperature control by zone, which can reduce the amount of packaging material used and improve energy efficiency and user convenience while securing the optimal consumption temperature for each food by controlling the blocking rate of the electromagnetic shielding part differently for each zone so that food in each partitioned zone can be heated simultaneously at different temperatures.

[0008]

[0009] According to one aspect of the present invention for solving the above problems, a packaging container for a microwave oven capable of selective temperature control is provided, comprising: a container body having a space for accommodating food; and an electromagnetic shielding part covering at least a portion of the container body and including an electromagnetic shielding control material, wherein the electromagnetic shielding part is formed on a container sealing sheet, a food package, or a combination thereof, and configured to control the electromagnetic shielding rate differently for each area so as to enable heating of food in each area to different temperatures.

[0010] In one embodiment, the container body may be composed solely of an electromagnetic shielding control material, solely of a heat-resistant plastic material or a paper material, or may be composed of a combination of an electromagnetic shielding control material and a conventional material such as a heat-resistant plastic material or a paper material.

[0011] In one embodiment, the cover portion covering the upper surface of the container body may include an electromagnetic wave transmission cover portion that transmits electromagnetic waves according to the divided space and an electromagnetic wave shielding cover portion that blocks electromagnetic waves.

[0012] In one embodiment, the electromagnetic shielding control material may be at least one metal material among aluminum, stainless steel, copper, and nickel; at least one carbon-based material among graphene and carbon nanotubes; at least one conductive polymer among PEDOT and polyaniline; or any one composite material thereof.

[0013] In one embodiment, the electromagnetic shielding member is composed of at least one layer including an electromagnetic shielding control material, and the at least one layer may be composed of at least one of a printable outer surface film layer, an electromagnetic shielding layer laminated on the inner side of the outer surface film layer and including the electromagnetic shielding control material, and a functional layer laminated on the inner side of the electromagnetic shielding layer.

[0014] In one embodiment, the electromagnetic shielding part is provided with one or more through holes that transmit electromagnetic waves in part or in whole, and the electromagnetic shielding rate can be controlled by adjusting at least one of the shape, size, number, arrangement, and density of the through holes.

[0015] In one embodiment, the electromagnetic shielding rate can be controlled within a range of 10 to 95% by adjusting the shape, size, number, arrangement, and density of the through holes, or can be extended to a range of 95 to 100% depending on the application situation, or the degree of electromagnetic shielding can be controlled by adjusting the density and thickness of the electromagnetic shielding control material.

[0016] In one embodiment, the electromagnetic shielding part may be a sealing film or skin packaging that seals the container body and includes an electromagnetic shielding layer composed of an electromagnetic shielding control material.

[0017] In one embodiment, the electromagnetic shielding part may be a package that encloses the exterior of the container body and includes an electromagnetic shielding layer composed of an electromagnetic shielding control material.

[0018] In one embodiment, the package may be a band, a sleeve, an open box, a closed box, or a sticker, and at least one of the container body and the package may be provided with a fixing means for fixing the position of the package.

[0019] In one embodiment, the band may be configured to be positioned on a marked line to guide the user to the location of the electromagnetic shielding part, and the user may be configured to adjust the degree of food heating in the corresponding area according to the marked line guide, and the sleeve may be provided with a means for fixing the position of the electromagnetic shielding part including a groove that matches the container, and the open box may be formed in a shape with one side closed and the other side open so that the position of the shielding part is fixed simply by fitting it into the container body, and the closed box may be configured so that the position of the shielding part is fixed simply by packaging the container.

[0020] In one embodiment, the package may include a pocket composed of an electromagnetic wave-transmitting material having an opening on one side, and a thin-plate electromagnetic shielding layer composed of an electromagnetic wave-blocking control material that can be inserted into the pocket.

[0021] In one embodiment, the container may further be provided with an electromagnetic shielding sticker, and the electromagnetic shielding sticker may be attached to a sealing sheet or package composed of an electromagnetic-transmitting material to be used in the production of packaging materials including an electromagnetic shielding part with a temperature control function, and the user may further control the temperature rise by closing a through hole or slot.

[0022] In one embodiment, the electromagnetic shielding part may be provided with a perforation line so that the user can select whether to cut the line to consume the food in the corresponding area warm or cold.

[0023] In one embodiment, the electromagnetic shielding unit can control the electromagnetic shielding rate to heat the food in the first compartment area to 55 to 70°C and maintain the food in the second compartment area at 5 to 25°C.

[0024] In one embodiment, the partitioned area includes a first area for accommodating rice and a second area for accommodating side dishes, and the electromagnetic shielding part may be configured to heat the first area to 60 to 70°C and the second area to 5 to 20°C.

[0025] In one embodiment, the electromagnetic shielding portion may be provided with a sealing sheet and a package together to form a multilayer electromagnetic shielding structure.

[0026]

[0027] A microwave oven packaging container capable of selective temperature control by region according to one embodiment of the present invention is equipped with an electromagnetic shielding part capable of independently controlling the temperature of divided spaces, thereby allowing food contained therein to be selectively heated to meet the temperature requirements of various foods.

[0028] In addition, a microwave oven packaging container capable of selective temperature control by region according to one embodiment of the present invention controls the degree of heating by adjusting the shape, size, number, arrangement, and density of through holes provided in the electromagnetic shielding part, thereby allowing the heating intensity to be finely selected according to the characteristics of the contained food, and thus enabling the food to be cooked in a variety of temperature ranges, from rapid heating at high temperatures to medium or minimal heating.

[0029] In addition, a microwave-safe packaging container capable of selective temperature control by region according to one embodiment of the present invention is equipped with a multi-layered electromagnetic shielding section, thereby combining the advantages of each material to effectively preserve the freshness, safety, and quality of food while maximizing the functionality and convenience of the packaging.

[0030] In addition, a microwave oven packaging container capable of selective temperature control by region according to one embodiment of the present invention can heat different temperatures simultaneously within a single packaging container through an electromagnetic shielding part composed of a sealing film and a package or a combination thereof, thereby reducing the amount of packaging container used, protecting the environment, and allowing food to be heated all at once, which can shorten cooking time and improve energy consumption efficiency.

[0031] In addition, a microwave-safe packaging container capable of selective temperature control by area according to one embodiment of the present invention is configured to allow the user to choose whether to consume the food in the corresponding area warm or cold by utilizing a perforation line or a sticker, thereby maximizing the user's satisfaction and convenience regarding food consumption.

[0032]

[0033] FIG. 1 is a perspective view of a microwave oven packaging container, sealing film, and package capable of selective temperature control by region according to one embodiment of the present invention.

[0034] FIG. 2 is an exemplary diagram of a microwave oven container capable of selective temperature control by region according to one embodiment of the present invention.

[0035] FIG. 3 is a perspective view of a packaging container and sealing sheet for a microwave oven capable of selective temperature control by region according to one embodiment of the present invention.

[0036] FIG. 4 is a diagram showing the configuration of a sealing sheet shielding fabric with a permeable / shielding separable type capable of selective temperature control by region according to an embodiment of the present invention.

[0037] FIG. 5 is a diagram showing the configuration of a sealing fabric with an integrated transparent / shielding section capable of selective temperature control by region according to one embodiment of the present invention.

[0038] FIG. 6 is an example of a packaging container and sealing sheet capable of selective temperature control by region according to one embodiment of the present invention.

[0039] FIG. 7 is an exemplary perspective view of a packaging container and package capable of selective temperature control by region according to one embodiment of the present invention.

[0040] FIG. 8 is an exemplary diagram showing the fixing structure of a package of a microwave oven packaging container capable of selective temperature control by region according to one embodiment of the present invention.

[0041] FIG. 9 is a diagram showing the configuration of a package shielding film material capable of selective temperature control by region according to one embodiment of the present invention.

[0042] FIG. 10 is an example of a blocking film hole pattern of a packaging container for a microwave oven capable of selective temperature control by region according to one embodiment of the present invention.

[0043] FIG. 11 is an example of a barrier film for a microwave-safe packaging container capable of selective temperature control by region according to one embodiment of the present invention.

[0044] FIG. 12 is an example diagram of the position of a shielding film inside a package of a microwave oven packaging container capable of selective temperature control by region according to one embodiment of the present invention.

[0045] FIG. 13 is an example diagram showing the application of a shielding film within a package of a microwave oven packaging container capable of selective temperature control by region according to one embodiment of the present invention.

[0046] FIG. 14 is a perspective view showing a cutting structure of a packaging container for a microwave oven capable of selective temperature control by region according to one embodiment of the present invention.

[0047] FIG. 15 is a perspective view showing an additional sticker structure for a microwave packaging container capable of selective temperature control by region according to one embodiment of the present invention.

[0048] FIG. 16 is an example of an external application of a shielding film and a fixing device for a packaging container and package capable of selective temperature control by region according to one embodiment of the present invention.

[0049] FIG. 17 is an example of an application of a shielding film embedded in a packaging container and package capable of selective temperature control by region according to one embodiment of the present invention.

[0050] FIG. 18 is an example diagram illustrating the implementation of a temperature difference in a packaging container for a microwave oven capable of selective temperature control by region according to one embodiment of the present invention.

[0051]

[0052] Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. In the drawings, parts unrelated to the explanation have been omitted to clearly explain the present invention, and the same reference numerals have been used for identical or similar components throughout the specification.

[0053] Hereinafter, a packaging container for a microwave oven capable of selective temperature control by region according to an embodiment of the present invention will be described in more detail with reference to the drawings.

[0054] FIG. 1 is a perspective view of a microwave oven packaging container, sealing film, and package capable of selective temperature control by region according to one embodiment of the present invention.

[0055] Referring to FIG. 1, a microwave oven packaging container capable of selective temperature control by region according to one embodiment of the present invention may be configured to include a container body (100) in which a plurality of food items are partitioned by region and sealed, and a sealing sheet (400) or package (600) including a sealing sheet shielding part (300) provided on the outside of the container body (100) and composed of an electromagnetic wave blocking control material and a package shielding film (500).

[0056] The sealing paper permeable portion (200) represents a sealing paper that covers the upper part of the container body (100) to prevent foreign substances from entering the food and simultaneously blocks contact with air.

[0057] The container body (100) includes an electromagnetic wave shielding control material and is formed from a material such as a conventional synthetic resin or paper, and can be formed to be divided into one or more spaces depending on the type of food being packaged.

[0058] The container (100) may be configured in any one of the following ways. The container (100) may be composed solely of an electromagnetic shielding control material. Additionally, the container (100) may be composed solely of a heat-resistant plastic material such as polypropylene (PP), polyethylene (PE), and polyethylene terephthalate (PET), or a paper material. Furthermore, the container (100) may be configured by combining the electromagnetic shielding control material with a heat-resistant plastic material or a paper material. In this case, the container (100) may be configured to satisfy the standards for a heat-resistant container for microwave ovens.

[0059] In one embodiment, the container body (100) may be composed solely of general microwave-safe plastic materials such as polypropylene (PP) and polyethylene terephthalate (PET). In this case, electromagnetic wave shielding control is performed entirely by the electromagnetic shielding unit, and shielding films are selectively placed on the top, bottom, and sides of the container to realize temperature control for each area. For example, by applying a shielding film with a blocking rate of 10 to 30% to the top, a shielding film with a blocking rate of 50 to 70% to the sides, and a non-blocking transparent film to the bottom, it is possible to heat rice located at the top, side dishes located at the sides, and soup located at the bottom at different temperatures within the same container.

[0060] The sealing sheet (400) seals the upper surface of the container body (100) and may have a structure formed of a permeable substrate (200) including a sealing sheet shielding portion (300).

[0061] The package (600) is positioned to surround the outer surface of the container body (100) and can be formed as a detachable structure. The package (600) has a structure in which an electromagnetic shielding layer (500) is formed on an electromagnetically transparent substrate, and can be attached or removed by the user as needed.

[0062] The shielding portion (300) and package shielding film (500), which are electromagnetic shielding layers, are composed of an electromagnetic shielding control material and may be formed from a conductive metal material such as aluminum, stainless steel, copper, nickel, silver, etc., or a conductive composition including graphene, carbon black, carbon nanotubes (CNT), PEDOT, polyaniline, etc. The thickness of the shielding layer is controlled in the range of 1 to 100 μm, and the electromagnetic shielding rate can be precisely controlled through density and thickness.

[0063] Additionally, the package (600) is configured to have different electromagnetic wave blocking rates corresponding to each partitioned area of ​​the container body (100), thereby allowing food in each partitioned area to be heated to different temperatures during the same microwave heating time.

[0064] The sealing sheet (400) is configured to maintain the freshness and ensure hygiene of food, and can be made of a composite film laminated with plastic film such as PP or PE or aluminum foil, and can be configured to maintain safety even when heated in a microwave oven.

[0065] FIG. 2 is an exemplary diagram of a microwave oven container capable of selective temperature control by region according to one embodiment of the present invention.

[0066] Referring to FIG. 2, the container body (100) can be utilized in various ways and may be made of a combination of a single-compartment container or a multi-compartment container having an electromagnetic wave shielding control material, or a conventional general container.

[0067] The container body (100) is divided into independent compartments by partitions, and each compartment can provide an independent space capable of accommodating different foods. This design can be optimized to simultaneously accommodate rice, main side dishes, side dishes, and soups, which are components of the Korean diet.

[0068] FIG. 3 is a perspective view of a packaging container and sealing sheet for a microwave oven capable of selective temperature control by region according to one embodiment of the present invention.

[0069] Referring to FIG. 3, the sealing sheet (400) may include an electromagnetic wave blocking control material and may be a separable sealing sheet (410) in which the transmitting part and the shielding part are separated, or an integrated sealing sheet (420) that is laminated and combined.

[0070] FIG. 4 is a configuration diagram of a sealing sheet shielding fabric with a permeable / shielding separated type capable of selective temperature control by region according to one embodiment of the present invention, and FIG. 5 is a configuration diagram of a sealing sheet with an integrated permeable / shielding type.

[0071] Referring to FIGS. 4 and 5, an exploded perspective view showing a multilayer structure of the electromagnetic shielding control material of the electromagnetic shielding part (310) and the separable sealing sheet (410), and an exploded perspective view showing a multilayer structure including the electromagnetic shielding control material of the integrated sealing sheet (420) can be seen.

[0072] In the container body (100) of a microwave oven packaging container capable of selective temperature control by region according to one embodiment of the present invention, an electromagnetic shielding layer (330) may be provided as needed.

[0073] The electromagnetic shielding layer (330) is located between the outer layer (230) and the inner layer (240) and may include a functional layer (250) as needed.

[0074] Looking at the technical features of the multilayer structure, the outer layer (230), which is the top layer, is composed of a printable material that can display product information, branding, and usage instructions, and can be made of a film material with excellent printability such as PET or PP. The thickness of the outer layer is typically set in the range of 4 to 50 μm to ensure print quality and durability.

[0075] The intermediate layer, the electromagnetic shielding layer (330), is a core component of the present invention and can be formed from a conductive metal such as aluminum, copper, or silver, or a conductive composition such as carbon black, graphene, or CNT. The thickness of the shielding layer is controlled in the range of 1 to 100 μm, and the electromagnetic shielding rate can be precisely controlled in the range of 10 to 100% depending on the type and thickness of the material.

[0076] The bottom layer, the inner layer (240), is a layer that comes into contact with food and is composed of a material that satisfies food container safety standards and can be made of one selected from PE, LDPE, LLDPE, HDPE, PP, PET, PBT, PEF, EVA, EAA, EMA, EVOH, PA, NY (Nylon), PVC, PVDC, PTFE, POM, TPU, TPE, PLA, PBS, paper, nonwoven fabric, and kraft, or a mixture thereof, which can be guaranteed to be harmless to the human body.

[0077] The functional layer (250) is composed of a material having functions such as durability, freezing storage, and fire prevention, and specifically, a functional material composed of one selected from PETM, VMPET, LLDPE, HDPE, LDPE, PP, NY (Nylon), OPP, CPP, slate, nonwoven fabric, KRT, and CPR, or a mixture thereof may be disposed.

[0078] Each layer may form a pattern structure identical to that of the shielding layer (330) for ease of manufacturing, and one layer excluding the shielding layer may be configured not to form a pattern for sealing food. The bonding of each layer is achieved through a non-toxic adhesive or a heat fusion method, and the layer may be designed so that separation does not occur even when heated in a microwave oven.

[0079] Through this multi-layer structure, electromagnetic shielding and packaging functions can be implemented simultaneously, while optimizing the characteristics of each layer to maximize overall performance. In particular, depending on the selection of materials for the outer layer, inner layer, and functional layer, it can respond to various storage conditions such as refrigeration, freezing, and room temperature storage, and optimal heating temperatures for different foods can be achieved by adjusting the composition of the electromagnetic shielding layer.

[0080] FIG. 6 is an example of a packaging container and sealing sheet capable of selective temperature control by region according to one embodiment of the present invention.

[0081] FIG. 7 relates to a package (600) capable of selective temperature control by region according to one embodiment of the present invention.

[0082] The package (600) of Fig. 7 may consist of a band (610), a sleeve (620), an open box (630), a sealed box (640), and a sticker (510).

[0083] The band (610) is configured to wrap around the outer surface of the container body (100) and includes an electromagnetic wave blocking control material to control the electromagnetic wave transmittance of a specific area of ​​the container. The band (610) wraps around the circumference of the container body (100) and is fixed by an adhesive or clip method, allowing the user to place it at a desired location to enable temperature control for each area.

[0084] The sleeve (620) is formed in a cylindrical or rectangular structure that covers the container body (100) from top to bottom, and an electromagnetic shielding control material may be optionally placed thereon. The sleeve (620) is designed to be separable from the container body (100), so that it can be reused and applied to containers of various sizes.

[0085] The open box (630) is in the form of a box with an open top, and can provide electromagnetic wave shielding effects from the top, bottom, and sides while accommodating the container body (500) inside. Electromagnetic wave shielding control materials are differentially arranged on the side walls of the open box (630) to enable different electromagnetic wave transmittance rates for each section of the container.

[0086] The sealed box (640) is a completely sealed structure equipped with a lid (641), which completely encloses the container body (100) and enables more precise temperature control. A through hole or an electromagnetic wave-transmitting window may be optionally formed in the lid (641) to achieve a differentiated heating effect for each area.

[0087] The sticker (510) is an adhesive patch containing an electromagnetic wave shielding control material, and can be attached to a desired location on the container body (100) to realize local temperature control. The sticker (510) is manufactured in various sizes and shapes, so that the user can selectively apply it according to the type of food and heating requirements.

[0088] Each component can provide different shielding performance by varying the density, thickness, and arrangement pattern of the electromagnetic shielding control material. This enables simultaneous heating of different types of food to their optimal temperatures within a single microwave oven, significantly improving energy efficiency and user convenience.

[0089] FIG. 8 is an exemplary diagram showing the fixing structure of a package of a microwave oven packaging container capable of selective temperature control by region according to one embodiment of the present invention.

[0090] A fixing structure for fixing the position of the package is provided at the container body or the package or at a corresponding position between the container body and the package, so that the through hole pattern can be effective at an accurate position.

[0091] Referring to FIG. 8, examples of fixing structures for microwave packaging containers capable of selective temperature control by region according to one embodiment of the present invention may be fixed by joining between a groove of the container body and a protrusion formed by folding of the package (600) as shown in FIG. 8 (a), and by joining between a protruding corner of the container body (100) and a cut groove of the package (600) as shown in FIG. 8 (b).

[0092] In the groove-protrusion coupling method of FIG. 8(a), a groove formed on the side of the container body and a protrusion formed through the bending process of the package (600) can be designed to interlock with each other. The depth of the groove is typically set in the range of 5 to 30 mm, and the height of the protrusion can be configured to correspond to the depth of the groove so as to enable an accurate fit. This structure prevents the package (600) from sliding or rotating in the container, thereby ensuring consistency in the electromagnetic shielding effect.

[0093] In the corner-groove joining method of FIG. 8(b), a protrusion formed on the corner portion of the container body (100) and a groove formed on the package (600) can be joined in the form of a clip. The width of the groove is designed to be slightly smaller than the thickness of the container corner so that tight fixation can be achieved through elastic deformation. The length of the groove is typically set in the range of 5 to 30 mm to provide sufficient fixing force.

[0094] The fixing structure is designed so that the user can easily attach and detach it, so even a general user can attach or remove the package (600) to the container with simple movements without any separate tools.

[0095] By ensuring that the electromagnetic shielding layer is accurately positioned at the intended location, the shielding effect corresponding to each food compartment can be precisely implemented. This enables the consistency and accuracy of temperature control.

[0096] It can be designed to maintain a fixed state without positional movement even during the microwave heating process so that the package (600) does not shake or detach despite microwave vibrations or rotation of the container. This can ensure a stable temperature control effect throughout the heating process.

[0097] In terms of durability, it is designed to maintain fixation even during repeated attachment and detachment, minimizing deformation or wear of the fixing structure even with long-term use, and retaining its initial fixation strength even after multiple uses. These features can be key factors in simultaneously ensuring product lifespan and ease of use.

[0098] In addition, the sleeve (620) of the package (600) may be formed to wrap around the entire container body (100) even though it is not illustrated, or the sleeve (620) may be matched to the shape of the container body (100). Also, a band (610) or an area where the electromagnetic shielding layer of the sleeve (620) is to be located may be marked on a sealing sheet or a separate packaging sheet covering the container body (100), or the location of the electromagnetic shielding layer may be guided in the form of a box (630) with one side closed.

[0099] Accordingly, according to the present invention, food items within the container body are automatically heated and cooked at different temperatures, so that warm food is heated and cold food, such as kimchi and salad, is only thawed and kept cold, thereby providing an optimal food taste.

[0100] Here, examples of set temperatures for heating food using a microwave oven are explained.

[0101] Room temperature foods (16~20°C): Sauces (Ssamjang, Gochujang, etc.), chocolate, some desserts (cookies, macarons, etc.)

[0102] Warm foods (50~60°C): Hamburgers, bread, boiled meat (suyuk, jokbal, etc.), meat side dishes, stir-fried dishes, fried foods, pan-fried dishes

[0103] Slightly hot foods (60–70°C): Steak, pizza, coffee, rice, hot cooked vegetables, some soups and stews, warm desserts

[0104] Hot food (65–75°C): Soups, stews, soups, instant noodles, hot tea (black tea, green tea, etc.), hot stews

[0105] As the optimal cooking temperature varies by food, the packaging may indicate the fixing position of the shielding film for adjusting the heating temperature and the heating time based on the microwave power capacity. The user guide clearly displays the estimated temperature and recommended heating time for each fixing position, enabling error-free use.

[0106] Therefore, food can be cooked to its optimal temperature with a single heating step, which is adjusted through the density of the electromagnetic shielding layer, the size, area, and density of the penetration holes, and this effect can be accurately realized through a fixed structure.

[0107] FIG. 9 is a diagram showing the configuration of a package shielding film material capable of selective temperature control by region according to one embodiment of the present invention.

[0108] Referring to FIG. 9, the container body (100) of a microwave oven packaging container capable of selective temperature control by region according to one embodiment of the present invention may be provided with an electromagnetic shielding layer (330) as needed.

[0109] The electromagnetic shielding layer (330) may be configured alone and, if necessary, may be located between the outer layer (230) and the inner layer (230), which are protective layers, and may include a functional layer (240) for performing additional functions.

[0110] Looking at the technical features of the multilayer structure, the protective layer (230) can be composed of a printable material as needed, and can display product information, branding, and usage instructions, and can be made of a film material with excellent printability such as PET or PP. The thickness of the outer layer is typically set in the range of 4 to 50㎛ to ensure print quality and durability.

[0111] The intermediate layer, the electromagnetic shielding layer (330), is a core component of the present invention and can be formed from a conductive metal such as aluminum, copper, or silver, or a conductive composition such as carbon black, graphene, or CNT. The thickness of the shielding layer is controlled in the range of 1 to 100 μm, and the electromagnetic shielding rate can be precisely controlled in the range of 10 to 100% depending on the type and thickness of the material.

[0112] The functional layer (250) is composed of a material having functions such as durability, freezing storage, and fire prevention, and specifically, a functional material composed of one selected from PETM, VMPET, LLDPE, HDPE, LDPE, PP, NY (Nylon), OPP, CPP, slate, nonwoven fabric, KRT, and CPR, or a mixture thereof may be disposed.

[0113] Each layer can form the same pattern structure as the shielding layer (330) depending on the ease of manufacturing.

[0114] Each layer is bonded using an adhesive or heat fusion method, and can be designed so that separation between layers does not occur even when heated in a microwave.

[0115] Through this multi-layer structure, electromagnetic shielding and packaging functions can be implemented simultaneously, while overall performance can be maximized by optimizing the characteristics of each layer. In particular, depending on the selection of the fabric material, it can respond to various storage conditions such as refrigeration, freezing, and room temperature storage, and optimal heating temperatures for each food item can be achieved by adjusting the composition of the electromagnetic shielding layer.

[0116] FIGS. 4, FIGS. 5 and FIGS. 9 are diagrams showing the structure of a food packaging material for a microwave oven packaging container capable of selective temperature control by region according to another embodiment of the present invention.

[0117] The above food packaging material can be used as a sealing film, skin film, or part of a package for sealing a container (100).

[0118] Food packaging materials can be provided by laminating PET film, aluminum material, and LLDPE.

[0119] The three-layer stacked structure allows each layer to perform a different function, thereby maximizing synergy. The sequential arrangement of the outer, middle, and inner layers can establish a complete protection system for food from the external environment.

[0120] A PET film can be placed on the outer surface of a microwave-safe packaging container (100) capable of selective temperature control to form an outer protective layer of the packaging. It provides a base for printing and design, allowing for printing with ink, and blocks oxygen and moisture to a certain extent, thereby maintaining the quality of the food inside for a certain period of time. It can protect the interior from external impacts and improve the durability of the packaging.

[0121] The aluminum fabric is placed on the inner surface of the PET film to block electromagnetic waves generated by the microwave oven. By blocking external factors such as oxygen, moisture, and light, the freshness and quality of the food inside can be preserved for a certain period of time.

[0122] The LLDPE film is placed on the inner surface of the aluminum sheet to come into contact with food. It ensures safety even when in direct contact with internal food and effectively seals the food to prevent leakage.

[0123] FIG. 10 is an example of a blocking film hole pattern of a packaging container for a microwave oven capable of selective temperature control by region according to one embodiment of the present invention.

[0124] Referring to FIG. 10, the electromagnetic shielding layer (330) of a microwave oven packaging container capable of selective temperature control by region according to one embodiment of the present invention may be provided on the entire surface area of ​​the container body (100) or on a part thereof, and depending on the degree of electromagnetic shielding, through holes and slits of a predetermined shape with a predetermined number, size, and density may be formed in the electromagnetic shielding layer (330). In addition, the density of the material constituting the electromagnetic shielding layer may be formed differently, or the thickness of the electromagnetic shielding layer may be formed differently.

[0125] The through holes formed in the electromagnetic shielding layer can be perforated in various shapes, densities, and sizes, thereby allowing for precise control of the electromagnetic shielding rate in the range of 10 to 95%, and for specific applications such as long-term storage, cold maintenance, and refrigerated products, complete shielding of 95 to 100% can be applied depending on the situation.

[0126] Each pattern can be selected according to the type of food, desired temperature, and heating time, and the temperature effect and recommended usage for each pattern can be clearly indicated on the product packaging so that users can easily make a selection.

[0127] The precision design of the elliptical through-hole film is characterized by an elliptical structure connected vertically, and the diameter of the upper circular part can be designed to be approximately 25 to 35 mm, while the diameter of the lower circular part can be designed to be approximately 20 to 30 mm. The width of the intermediate connecting part is set to 8 to 15 mm, allowing for fine control of the amount of electromagnetic wave transmission. While this asymmetrical elliptical structure heats up rapidly with a relatively wide electromagnetic wave transmittance, electromagnetic waves can be controlled more precisely and uniformly by narrowing the width of the connecting part where electromagnetic waves from the upper and lower circular parts overlap.

[0128] Referring to the circular hole pattern, a plurality of circular holes may be provided by being irregularly dispersed. In this case, the holes are provided as the only path through which electromagnetic waves can pass, and the diameter of the holes can typically be set in the range of 2 to 50 mm. The circular hole pattern enables the uniform dispersion of electromagnetic waves, thereby providing an even heating effect.

[0129] Enlarging the size of the holes reduces the electromagnetic shielding rate, allowing food located underneath to be heated rapidly to a high temperature. Conversely, reducing the number of holes increases the electromagnetic shielding rate, enabling the heating of the food underneath to be controlled to a medium or minimum level. By adjusting the density of the holes, the electromagnetic shielding rate can be precisely controlled within a range of 10 to 90%. Depending on the situation, it can even be precisely controlled up to a range of 100%.

[0130] Referring to the rectangular slit pattern, multiple rectangular holes can be formed at regular intervals in the horizontal direction. The length of the slit is typically set in the range of 10 to 200 mm and the width in the range of 1 to 20 mm, and electromagnetic waves can be selectively transmitted through the rectangular holes. This linear pattern enables directional heating, which can be advantageous for concentrated heating of a specific area.

[0131] Referring to the grid-shaped hole pattern, multiple holes can be formed by intersecting in horizontal and vertical directions in a grid shape. The grid spacing is typically set in the range of 5 to 30 mm, and the transmission of electromagnetic waves can be controlled more uniformly through the grid-shaped hole structure. By adjusting the arrangement of holes in the horizontal and vertical directions, the heating intensity of a specific area can be finely controlled, and food can be heated most quickly by transmitting electromagnetic waves over the widest area.

[0132] The above-mentioned through holes can be formed not only in a single pattern but also in a complex manner by region, providing different heating intensities by zone within the same film, thereby achieving a variable blocking rate of 20 to 70%. The shielding section can control the partial electromagnetic wave blocking rate depending on the location of the holes. In areas close to the holes, the electromagnetic wave blocking rate decreases, causing the temperature to rise easily, while in areas without holes, the electromagnetic wave blocking rate increases, thereby suppressing the temperature rise. Through this, different temperature distributions by region can be realized even within the same container.

[0133] The selection criteria for the hole pattern are determined by the type of food and heating requirements; the circular pattern is optimized for uniform heating, the rectangular pattern for directional heating, and the grid pattern for maximum heating. These various pattern options enable user-customized temperature control.

[0134] When examining the correlation between the characteristics of the penetration holes and the electromagnetic shielding rate, the larger the area of ​​the penetration holes, the lower the shielding rate becomes, allowing for high-temperature heating; conversely, the greater the number of penetration holes, the lower the shielding rate becomes, enabling rapid heating. The higher the density of the penetration holes, the more uniform the temperature distribution becomes, and the fewer the penetration holes, the greater the shielding rate becomes, allowing for a low-temperature maintenance effect.

[0135] For example, for soups and stews, only a transparent film is used to provide maximum heating with a 0% blocking rate; for rice dishes, a large circular or rectangular pattern is applied to provide sufficient heating with a 10 to 30% blocking rate; and for main side dishes, a medium circular pattern is used to maintain an appropriate temperature with a 30 to 50% blocking rate. For auxiliary side dishes, a small circular pattern is applied to prevent excessive heating with a 50 to 70% blocking rate, and for kimchi or pickles, a non-perforated or ultra-small pattern is used to maintain a cool state with a high blocking rate of 80 to 95%. In this case, depending on the situation, a cool state can also be maintained with a high blocking rate of 95 to 100%.

[0136] For foods requiring cold preservation, such as cold salads or kimchi, a 95–100% barrier can be applied to suppress heating and maintain a cold state, while for menus with high moisture content, such as soups and stews, a low barrier rate of 10% or less can be applied to induce maximum heating. This allows for the simultaneous implementation of completely different temperature conditions within a single package.

[0137] In terms of drilling technology, laser drilling is suitable for producing precise circular holes and can process from a diameter of 0.1 mm, while punching is economical for mass production and can be applied from a diameter of 0.5 mm. Etching is specialized for realizing complex patterns and microstructures, and molding is suitable for large through holes through integral production.

[0138] As a quality control standard, the through hole diameter error can be maintained within ±5%, and the positional accuracy can be managed within ±0.2mm. Surface roughness is limited to Ra 1.6μm or less, and penetration completeness is ensured to achieve clog-free complete drilling.

[0139] FIG. 11 is an exemplary diagram of a barrier film for a microwave oven packaging container capable of selective temperature control by region according to one embodiment of the present invention, and FIG. 12 is an exemplary diagram of the position of a shielding film within a package of a microwave oven packaging container capable of selective temperature control by region according to one embodiment of the present invention.

[0140] FIG. 13 is an example diagram showing the application of a shielding film within a package of a microwave oven packaging container capable of selective temperature control by region according to one embodiment of the present invention.

[0141] Referring to FIG. 13(a), the shielding film is provided with an adhesive area (530) so that it can be freely attached to a package, and can be attached to the upper surface, lower surface, or inside of the package (600) as in FIG. 12.

[0142] Referring to FIG. 13(b), the package (600) may be configured such that the electromagnetic shielding layer is bonded to another layer, and as another example, may be composed of a pocket (650) made of a material through which electromagnetic waves pass and having an opening on one side, and a thin plate-shaped electromagnetic shielding layer (500) made of an electromagnetic shielding control material that can be inserted into the pocket (650), so that the package can be used in a microwave oven with the electromagnetic shielding layer (500) removed or inserted according to the user's preference.

[0143] The pocket (650) is made of an electromagnetic wave-transmitting material and is configured so that electromagnetic waves can pass through it freely, and an opening is formed on one side to facilitate the insertion and removal of the electromagnetic wave shielding layer (500). The size of the pocket (650) is typically designed to have a margin of 10 to 20 percent compared to the shielding layer (500) so that smooth insertion and removal are possible.

[0144] The thin electromagnetic shielding layer (500) is manufactured in the form of a thin film with a thickness ranging from 0.01 to 1 mm, making it easy to insert into the pocket (650), and may be composed of a metal thin film, a carbon-based thin film, a magnetic material, or a mixture thereof. For flexibility of the shielding layer (500), it may be manufactured by coating a metal layer on a plastic substrate such as PET or PP.

[0145] When the electromagnetic shielding layer (500) is completely removed from the pocket (650), the area is heated to the highest temperature with 100% electromagnetic transmission, and when the electromagnetic shielding layer (500) is inserted, the temperature can be precisely controlled with a blocking rate in the range of 10 to 95% depending on the characteristics of the shielding layer. In addition, for specific applications, complete blocking in the range of 95 to 100% may be applied.

[0146] The pocket (650) is divided by packaging area of ​​the food so that the heating location can be selected. For example, high temperature heating can be implemented by removing the shielding layer in the pocket of the rice area, medium temperature heating can be implemented by maintaining the shielding layer in the pocket of the side dish area, and low temperature maintenance can be implemented by using a high-shielding shielding layer in the pocket of the kimchi area.

[0147] The package (600) may be formed to completely enclose the container body (100) or configured to enclose only a part of the container body (100). The full enclosing method allows for independent temperature control of all areas, while the partial enclosing method can be applied when selective temperature control is required for only specific areas.

[0148] Regarding the characteristics of the electromagnetic shielding material, the temperature of food can be precisely controlled based on at least one of the number, area, density, and thickness of the penetration holes, or the density of the electromagnetic shielding material. As the number of penetration holes increases, the blocking rate decreases, enabling high-temperature heating; conversely, as the number of penetration holes decreases, the blocking rate increases, enabling low-temperature maintenance or medium-temperature heating.

[0149] The pocket structure allows users to change the temperature control method in real time. Unlike conventional fixed shielding structures, the pocket method can flexibly adapt to the user's preferences and situations, enabling personalized food heating.

[0150] Both the pocket (650) and the electromagnetic shielding layer (500) are made of a material that satisfies food safety standards and can be designed so that no harmful substances are generated even when heated in a microwave oven.

[0151] FIG. 14 is a perspective view showing a cutting structure of a packaging container for a microwave oven capable of selective temperature control by region according to one embodiment of the present invention.

[0152] In the drawing, it appears as a dotted line. The dotted line (660) can adjust the precision of temperature control according to the user's choice.

[0153] A perforation line (660) is provided at a specific location on a package (600) including an electromagnetic shielding layer (500) to allow a user to select the consumption temperature of the food packaged in the container body (100). Depending on whether the perforation line (660) is cut, the food can be consumed warm, cold, or cool.

[0154] The specific usage method is as follows. When the electromagnetic shielding layer is cut along the perforation line (660), electromagnetic waves pass through the corresponding area, allowing the food to be heated. Conversely, if the perforation line (660) is left as is, electromagnetic waves are blocked, allowing the food to be eaten cool.

[0155] For example, in the case of tofu, users may prefer to eat it hot or cold. In this case, if the electromagnetic shielding layer is cut along the cut line (660) where the tofu is located, the tofu will be heated, and if the cut line is left as is, the electromagnetic waves will be blocked so that the tofu can be eaten cold.

[0156] The shape and location of the perforation line (660) are optimized by considering the type of food and the user's preference, and can be placed in each partitioned area of ​​the container body (100). The width of the perforation line is typically set in the range of 0.1 to 2 mm and can be formed with a depth and strength that allows it to be easily torn by hand.

[0157] FIG. 15 is a perspective view showing an additional sticker structure for a microwave packaging container capable of selective temperature control by region according to one embodiment of the present invention.

[0158] Referring to FIG. 15, a microwave oven packaging container capable of selective temperature control by region according to one embodiment of the present invention may further include an additional sticker (670) configured to include an electromagnetic shielding layer in addition to a perforation line as another example for temperature control.

[0159] Looking at the structural features of the sticker (670), it is manufactured as a thin film structure in a rectangular shape, as shown separately in the upper left corner, and can be composed of a multilayer structure including an electromagnetic shielding material. The size of the sticker (670) is typically set in the range of 10x10mm to 50x50mm and can be designed to effectively close through holes or slots.

[0160] The material composition of the sticker (670) may consist of a three-layer structure including an adhesive layer, an electromagnetic shielding layer, and a protective layer. The adhesive layer is made of a food-safe adhesive and is safely attached to a container or package, and the electromagnetic shielding layer may be made of aluminum foil, a copper film, or a conductive carbon material. The protective layer may be made of PET or PP film to prevent damage to the shielding layer.

[0161] Users can use stickers to block through-holes and slots to lower the rising temperature. Specifically, by attaching stickers over existing through-hole patterns, the amount of electromagnetic wave transmission can be further blocked. For example, if stickers are attached to a medium circular pattern with a blocking rate of 30 to 50%, the blocking rate increases to 60 to 80%, thereby further suppressing the temperature rise.

[0162] The sticker can close through holes and slots and increase the thickness of the container body, thereby preventing temperature rise in various ways. The effect of increasing thickness provides an additional shielding layer of 0.1 to 0.5 mm, improving electromagnetic shielding performance, and the temperature can be controlled in stages through the use of multiple stickers.

[0163] The sticker (670) allows the user to attach the sticker to a desired area when temporary blocking is required or when the user wants to temporarily increase the blocking rate in a specific section. In situations requiring fine adjustment, the temperature can be finely controlled by adding additional blocking when the user feels the temperature is too high with the basic pattern, and in personalized use, individualized temperature control is possible by adjusting the blocking rate according to the user's personal temperature preference. As a seasonal response measure, it can be used additionally when the user prefers cold food in the summer to keep the food even cooler.

[0164] The sticker (670) can be easily attached by hand without any separate tools, making it highly convenient to use. It is also easy to remove, allowing for clean removal and reuse when necessary. Additionally, the sticker (670) is made of a material that meets food safety standards, ensuring safety even with direct or indirect contact with food. Furthermore, in terms of cost-effectiveness, it allows for the expansion of temperature control options at a low cost, making it highly cost-effective.

[0165] The sticker (670) can ensure stability during the heating process by securing sufficient adhesive strength so that it does not fall off even during microwave heating. In terms of heat resistance, it has heat resistance that does not deform even at temperatures above 100°C, maintaining performance even in high-temperature environments, and in terms of electromagnetic wave shielding performance, the sticker alone can provide 70 to 90% shielding performance, enabling effective temperature control. In terms of food safety, it does not release harmful substances even when heated, ensuring safe use.

[0166] FIG. 16 is an example of an external application and fixing device for a shielding film of a packaging container and package capable of selective temperature control by region according to an embodiment of the present invention, and FIG. 17 is an example of an internal application of a shielding film of a packaging container and package capable of selective temperature control by region according to an embodiment of the present invention.

[0167] FIG. 18 is an example diagram illustrating the implementation of a temperature difference in a packaging container for a microwave oven capable of selective temperature control by region according to one embodiment of the present invention.

[0168] Referring to Fig. 18, after cooking in a microwave, the ssamjang and kimchi on one side are at 10°C, while the bossam and rice on the other side are at 65°C and 60°C, respectively.

[0169] Analyzing the meaning of the actual implemented temperature difference, the differential heating frozen Bossam set meal prototype on the left is an actual manufactured prototype to which the technology of the present invention is applied, while the temperatures of each food item after microwave heating of the prototype on the right show the actual temperature distribution measured by an infrared thermal imaging camera.

[0170] Analyzing the temperature measurement results, the Bossam region at 65℃ represents the optimal consumption temperature for meat side dishes, demonstrating an ideal state that is sufficiently warm without being overheated. The rice region, recording 60℃, represents the appropriate temperature for the staple food, achieving the optimal temperature for delicious consumption without compromising texture or flavor. The Ssamjang and Kimchi regions, maintained at 10℃, indicate a temperature preserved in a cool state while maintaining the inherent characteristics of fermented foods.

[0171] Achieving a maximum temperature difference of 55℃ is an achievement that was impossible with existing microwave technology, and it demonstrates that each food can be heated to a different optimal temperature with the same heating time and output.

[0172] Regarding temperature measurement methods and accuracy, the precise distribution of food surface temperatures was verified through non-contact temperature measurement using an infrared thermal imaging camera. Furthermore, reliable temperature differences were confirmed with an accuracy of within ±2℃ by measuring immediately after microwave heating was completed while minimizing temperature loss.

[0173] Standardization of experimental conditions was achieved by fixing the heating time to 7 minutes and 30 seconds (based on 700W), setting the initial temperature to -20±2℃, which is a frozen storage state, and ensuring reproducibility through 10 repeated measurements in a measurement environment of room temperature 20±2℃ and humidity 50±10%.

[0174] When examining the analysis of shielding effects by region, the region maintained at 10℃ showed almost complete shielding with 90–95% electromagnetic shielding, the region reached 60℃ allowed for adequate heating with 30–40% electromagnetic shielding, and the region recorded at 65℃ achieved sufficient heating with 20–30% electromagnetic shielding.

[0175] The fact that spark problems do not occur because contact between electromagnetic shielding layers does not occur even when using a microwave oven is the result of ensuring electrical safety through insulation design and maintaining appropriate spacing. Safety can be ensured by applying insulation layers that maintain an insulation gap of at least 0.05 mm between shielding layers, implementing a conductive material separation design to prevent direct contact between metal shielding layers, applying a grounding method that prevents electrostatic discharge through safe grounding, and conducting a full inspection for spark occurrence before shipment.

[0176] We have confirmed the texture optimization effect, which maintains the unique texture and taste of each food at the optimal temperature, and the heat-sensitive nutrient protection effect by preventing overheating. We can improve user satisfaction by providing temperature combinations tailored to individual preferences and save energy by achieving various temperatures with a single heating.

[0177] A packaging container (100) for microwave ovens capable of selective temperature control is a packaging container for heating food in a microwave oven at different temperatures in different zones within a single container. By controlling the electromagnetic wave blocking rate by adjusting the material of the cover that contacts the upper surface of the divided internal space of the container and the properties of the holes provided in the cover, multiple foods can be heated to an appropriate temperature simultaneously, thereby improving energy efficiency and user convenience.

[0178] Different types of hole patterns can be formed on the top surface of the cover portion. A linear slot pattern is arranged in the left area and a circular through-hole pattern is arranged in the right area, enabling differentiated electromagnetic shielding rates for each section.

[0179] The container body (100) may have a space formed inside an electromagnetic wave shielding control material fabric to accommodate food. The container body (100) may be placed on the ground and may be formed with an open top to accommodate food. The internal space may be divided by partitions to form multiple divided spaces, for example, a left space and a right space may be formed to accommodate different foods. The container body (100) may accommodate rice in the left space and side dishes in the right space.

[0180] The container body (100) may be provided with one of the following as an electromagnetic shielding control material: a metal material such as aluminum, stainless steel, copper, or nickel; a carbon-based material such as graphene or carbon nanotubes; a conductive polymer pellet such as PEDOT or polyaniline; or a composite material thereof. The electromagnetic shielding control material may have the form of powder, particle, flake, or pellets, and since the density varies depending on the form, the electromagnetic shielding rate of the metal thin film can be controlled by controlling the density through changing the form.

[0181] In the case of a packaging material in which a shape with a low density of electromagnetic wave shielding control material is included on one side and a shape with a high density is included on the other side, the one side containing the low density shape has a reduced electromagnetic wave shielding rate, causing the temperature to rise, while the other side containing the high density shape has a higher electromagnetic wave shielding rate, allowing the temperature to be maintained at a lower level. Accordingly, the container body (100) can block electromagnetic waves generated by the microwave oven and control the degree of heating of the food contained inside.

[0182] The cover portion can cover the upper surface of the divided space of the container body (100) and can cover at least one space. It can cover the entire upper surface of the packaging container while simultaneously sealing the divided space, and may be provided in the number of divided spaces corresponding to the number of divided spaces for independent opening and closing.

[0183] The cover portion may be provided by laminating an outer sheet and an inner sheet made of different materials. It may be provided by laminating electromagnetic shielding materials, polyethylene (PE) series materials such as LDPE, HDPE, and LLDPE, other plastic series materials such as PP, PVC, EVOH, and NY, film series materials such as VMPET, OPP, CPP, KRT, and CPR, and paper series materials such as kraft paper, kraft paper, and corrugated cardboard.

[0184] In this way, a microwave-safe packaging container (100) capable of selective temperature control according to one embodiment of the present invention is provided with a multi-layered food packaging material, thereby combining the advantages of each material to effectively preserve the freshness, safety, and quality of the food while maximizing the functionality and convenience of the packaging.

[0185] Although an embodiment of the present invention has been described above, the concept of the present invention is not limited to the embodiments presented in this specification. Those skilled in the art who understand the concept of the present invention may easily propose other embodiments within the scope of the same concept by adding, changing, deleting, or adding components, and such are also to be considered to fall within the scope of the concept of the present invention.

Claims

1. A container body in which a space for accommodating food is formed; and An electromagnetic shielding part covering at least a portion of the above-mentioned container body and comprising an electromagnetic shielding control material; Includes, A microwave oven packaging container capable of selective temperature control, characterized in that the electromagnetic shielding portion is formed from a sealing film, a package, or a combination thereof, and is configured to control the electromagnetic shielding rate differently for each area so that food in each area can be heated to different temperatures.

2. In Paragraph 1, The above container body is, Composed solely of electromagnetic shielding control materials, or Composed solely of heat-resistant plastic or paper materials, A microwave oven packaging container capable of selective temperature control, characterized by being composed of a combination of an electromagnetic wave shielding control material and a conventional material such as a heat-resistant plastic material or a paper material.

3. In Paragraph 1, The cover portion covering the upper surface of the above-mentioned container body is, A packaging container for a microwave oven capable of selective temperature control, characterized by including an electromagnetic wave transmission cover that transmits electromagnetic waves and an electromagnetic wave shielding cover that blocks electromagnetic waves according to the divided space.

4. In Paragraph 1, The above electromagnetic wave shielding control material is, At least one metal material among aluminum, stainless steel, copper, and nickel, At least one carbon-based material among graphene and carbon nanotubes, At least one conductive polymer among PEDOT and polyaniline, A microwaveable packaging container capable of selective temperature control, characterized by being one of the composite materials thereof.

5. In Paragraph 1, The above electromagnetic shielding part is, It is composed of at least one layer including an electromagnetic shielding control material, and A packaging container for a microwave oven capable of selective temperature control, characterized in that the above-mentioned at least one layer comprises at least one of a printable outer surface film layer, an electromagnetic shielding layer laminated on the inner side of the outer surface film layer and including an electromagnetic shielding control material, and a functional layer laminated on the inner side of the electromagnetic shielding layer.

6. In Paragraph 1, In the above electromagnetic shielding part, One or more through holes that transmit electromagnetic waves in part or in whole are provided, A microwave oven packaging container capable of selective temperature control, characterized by controlling the electromagnetic wave blocking rate by adjusting at least one of the shape, size, number, arrangement, and density of the above-mentioned through holes.

7. In Paragraph 6, The electromagnetic shielding rate is adjusted within the range of 10 to 95% by controlling the shape, size, number, arrangement, and density of the above-mentioned through holes, and can be extended to the range of 95 to 100% depending on the application situation, or A microwave oven packaging container capable of selective temperature control, characterized by controlling the degree of electromagnetic shielding by adjusting the density and thickness of the above-mentioned electromagnetic shielding control material.

8. In Paragraph 1, The above electromagnetic shielding part is, A packaging container for a microwave oven capable of selective temperature control, characterized by sealing the container body and including a sealing film or skin packaging comprising an electromagnetic shielding layer composed of an electromagnetic shielding control material.

9. In Paragraph 1, The above electromagnetic shielding part is, A microwave oven packaging container capable of selective temperature control, characterized by being a package that encloses the exterior of the container body and includes an electromagnetic shielding layer composed of an electromagnetic shielding control material.

10. In Paragraph 9, A microwaveable packaging container capable of selective temperature control, characterized in that the above package may be a band, sleeve, open box, closed box, or sticker, and at least one of the container body and the package is provided with a fixing means for fixing the position of the package.

11. In Paragraph 10, The above-mentioned band can be configured to be positioned on a marked line to guide the user to the location of the electromagnetic shielding part, and can be configured to allow the user to adjust the degree of food heating in the corresponding area according to the marked line guide. The above sleeve may be provided with an electromagnetic shielding position fixing means including a groove that matches the container, and The above-mentioned open box can be formed with one side closed and the other side open so that the position of the shielding part is fixed simply by inserting it into the container body. The above-described closed box is a microwave-safe packaging container capable of selective temperature control, characterized in that the position of the shielding part is fixed simply by packaging the container.

12. In Paragraph 9, A packaging container for a microwave oven capable of selective temperature control, characterized in that the above package comprises a pocket composed of an electromagnetic wave-transmitting material and having an opening on one side, and a thin-plate electromagnetic shielding layer composed of an electromagnetic wave-blocking control material that can be inserted into the pocket.

13. In Paragraph 1, The above container may further be equipped with an electromagnetic wave blocking sticker, and The above-mentioned electromagnetic shielding sticker can be attached to a sealing sheet or package composed of an electromagnetic wave-transmitting material and utilized in the production of packaging materials including an electromagnetic shielding part with a temperature control function, and the microwave packaging container capable of selective temperature control is characterized by the fact that the user can additionally control the temperature rise by closing a through hole or slot.

14. In Paragraph 1, A microwave oven packaging container capable of selective temperature control, characterized in that the electromagnetic shielding portion is provided with a perforation line, allowing the user to select whether to consume the food in the corresponding area warm or cold depending on whether to cut it.

15. In Paragraph 1, A packaging container for a microwave oven capable of selective temperature control, characterized in that the electromagnetic shielding part controls the electromagnetic shielding rate to heat food in a first compartment area to 55 to 70°C and maintain food in a second compartment area at 5 to 25°C.

16. In Paragraph 1, The above-described area includes a first area for accommodating rice dishes and a second area for accommodating side dishes, and A packaging container for a microwave oven capable of selective temperature control, characterized in that the electromagnetic shielding part is configured to heat a first region to 60 to 70°C and a second region to 5 to 20°C.

17. In Paragraph 1, The above-mentioned electromagnetic shielding portion is characterized by having a sealing film and a package together to form a multi-layer electromagnetic shielding structure, thereby enabling selective temperature control for a microwave oven packaging container.

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