Packaging material for microwave oven

Abstract

This packaging material for a microwave oven comprises: a packaging pack that includes an electromagnetic wave-blocking layer made of a metal thin film including an electromagnetic wave-blocking control material and forms a food accommodation space for accommodating food; and a temperature control unit, which passes through a plurality of regions of the electromagnetic wave-blocking layer, for controlling the temperature of the food accommodated in the food accommodation space.

Description

Microwave-safe packaging materials

[0001] The present invention relates to a packaging material for a microwave oven, and more particularly, to a packaging material for a microwave oven that controls the temperature of food using a microwave oven and prevents sparks.

[0002] Recently, the food industry has seen a surge in popularity of meal kits, which can be prepared on the spot by microwave cooking at convenience stores and other retailers, thanks to advancements in distribution and processing technology. These meal kits combine pre-prepared ingredients and seasonings, along with recipes, for a simple and easy cooking experience. These meal kits offer consumers the convenience of fresh ingredients and easy cooking, while also offering a taste of famous restaurants. Demand for these products has been rapidly increasing, particularly amidst the COVID-19 pandemic.

[0003] Accordingly, the commercialization of various types of meals as meal kits is progressing, mainly by large corporations, and participation and interest in the meal kit market is steadily increasing not only among small and medium-sized enterprises but also among individuals.

[0004] However, distributed foods, including meal kits, need to be heated to a specific temperature or changed depending on the cooking method. However, the microwave-safe packaging materials introduced so far only provide a simple heating function for the food placed inside the packaging, making it difficult to use a wider variety of foods.

[0005] Accordingly, the purpose of the present invention is to provide a microwave-safe packaging material capable of controlling the temperature of food using a microwave oven.

[0006] In order to achieve the above object, a packaging material for a microwave oven according to the present invention comprises: a packaging pack including an electromagnetic wave shielding layer made of a metal thin film including an electromagnetic wave shielding control material, and forming a food receiving space for receiving food; and a temperature control unit formed through a plurality of regions of the electromagnetic wave shielding layer to control the temperature of food received in the food receiving space. The electromagnetic wave shielding layer can be used to prevent the temperature of the food from rising, and the temperature control unit can be used to properly heat the food, so that the user can control the food to a desired temperature and eat it, thereby improving the user's satisfaction with food consumption.

[0007] Here, the temperature control unit is preferably configured to control the temperature of food received in the food receiving space based on at least one of a penetration area formed through multiple regions of the electromagnetic wave shielding layer and a thickness of the electromagnetic wave shielding layer, so that the penetration area and the thickness of the electromagnetic wave shielding layer can be selected according to the type of food, thereby allowing the food to be set to a desired temperature.

[0008] And when the temperature control unit is formed with a plurality of through holes, the temperature of food received in the food receiving space is controlled according to the number of the plurality of through holes and the diameter of the plurality of through holes, so that as the number and diameter of the through holes increase, the food can be heated quickly by the microwave oven, and as the number and diameter of the through holes decrease, the speed at which the food is heated by the microwave oven decreases, which is preferable.

[0009] Here, when the temperature control unit is formed of a plurality of slots with equal spacing, the temperature of food received in the food receiving space is controlled according to the number of the plurality of slots and the spacing between the plurality of slots, so that as the number and spacing of the slots increase, the food can be heated quickly by the microwave oven, and as the number and spacing of the slots decrease, the speed at which the food is heated by the microwave oven decreases, which is preferable.

[0010] And the packaging pack is preferably formed by including an outer surface film layer that can be printed; an electromagnetic wave blocking layer laminated on the inner side of the outer surface film layer and blocking oxygen, moisture, light, and electromagnetic waves; a functional layer laminated on the inner side of the electromagnetic wave blocking layer; and a heat-bonding layer laminated on the inner side of the functional layer and in contact with food, so that food can be cleanly contained, heated, and consumed hygienically.

[0011] Here, when the two above-mentioned thermal bonding layers are mutually thermally bonded to form two layers of the above-mentioned packaging packs, if the two above-mentioned functional layers are placed between the two above-mentioned electromagnetic wave blocking layers, the two above-mentioned electromagnetic wave blocking layers are separated to fundamentally block the movement of electrons, thereby preventing sparks, which is preferable.

[0012] And, when the two above-mentioned thermal bonding layers are mutually thermally bonded to each other to thermally bond the two above-mentioned packaging packs in two layers, it is preferable that the two above-mentioned functional layers are not arranged so that the two above-mentioned electromagnetic wave blocking layers are in close contact with each other, so that the two above-mentioned electromagnetic wave blocking layers are in complete close contact with each other, so that electrons can move freely without obstruction and sparks are not generated.

[0013] Here, when the two thermal bonding layers are mutually thermally bonded to form two layers of the packaging packs, if the electromagnetic wave blocking layer is not disposed in the thermally bonded area of ​​one of the two packaging packs, it is preferable to remove the electromagnetic wave blocking layer on one side of the thermally contacted portion and keep the electromagnetic wave blocking layer from the point where the contact ends to prevent sparks from occurring.

[0014] And, when a notch is formed in the above packaging pack, it is preferable that the shape of the notch be formed so as not to have sharp parts, so as to prevent sparks generated by sharp parts.

[0015] Here, when a notch is formed in the packaging pack, it is preferable that the electromagnetic wave shielding layer is not placed in the area where the notch is formed, so that there is no sharp part in the electromagnetic wave shielding layer and it is not exposed to the outside, thereby preventing sparks.

[0016] And, when the electromagnetic wave shielding layer is formed with a plurality of slots, it is preferable that the temperature can be controlled in the form of slots rather than through holes when it is manufactured into a composite by rolling together with the outer surface film layer, the functional layer, and the thermal bonding layer, thereby improving productivity.

[0017] According to the present invention, the temperature of food can be prevented from rising by using an electromagnetic wave shielding layer, and the food can be heated appropriately by using a temperature control unit, so that the user can control the food to a desired temperature and eat it, thereby improving the user's satisfaction with food consumption.

[0018] Additionally, since the penetration area and thickness of the electromagnetic wave shielding layer can be selected depending on the type of food, it has the effect of allowing the food to be cooked to the desired temperature.

[0019] Additionally, as the number and diameter of the penetration holes increase, the food can be heated more quickly by the microwave oven, and as the number and diameter of the penetration holes decrease, the speed at which the food is heated by the microwave oven decreases.

[0020] Additionally, as the number and spacing of slots increase, the food can be heated more quickly by the microwave oven, and as the number and spacing of slots decrease, the speed at which food is heated by the microwave oven decreases.

[0021] Additionally, it has the effect of allowing food to be stored cleanly, heated, and consumed hygienically.

[0022] In addition, by separating the two electromagnetic wave shielding layers, the movement of electrons is blocked at the source, the two electromagnetic wave shielding layers are brought into complete close contact so that electrons can move freely without hindrance, and by removing one side of the electromagnetic wave shielding layer at the part where thermal contact is attached and keeping the electromagnetic wave shielding layer from the point where the contact ends, there is an effect of preventing sparks from occurring.

[0023] Additionally, it can prevent sparks generated by sharp parts, and has the effect of preventing sparks because the electromagnetic wave shielding layer is not exposed to the outside.

[0024] Additionally, it has the effect of improving productivity by allowing temperature control in the form of slots rather than through holes.

[0025] Figure 1 is an example of temperature rise according to the number of through holes, hole diameter, and thickness of a packaging material for a microwave oven according to the present invention.

[0026] Figure 2 is an example using packaging material for a microwave oven.

[0027] Figure 3 is an example of the structure of a packaging pack.

[0028] Figure 4 is an example of a slot-shaped temperature control unit.

[0029] Figure 5 is an example of a temperature control unit of a microwave oven packaging material.

[0030] Figure 6 is an example diagram for preventing sparks.

[0031] Figure 7 is an example of spark prevention in a notch.

[0032] Figure 8 shows various examples of packaging packs.

[0033] Hereinafter, a packaging material (1) for a microwave oven according to a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0034] FIG. 1 is an exemplary diagram showing temperature rise according to the number, hole diameter, and thickness of through holes (21) of a microwave-use packaging material (1) according to the present invention, FIG. 2 is an exemplary diagram using a microwave-use packaging material (1), FIG. 3 is an exemplary diagram showing the structure of a packaging pack (10), FIG. 4 is an exemplary diagram showing a slot-shaped temperature control unit (20), FIG. 5 is an exemplary diagram showing a temperature control unit (20) of a microwave-use packaging material (1), FIG. 6 is an exemplary diagram showing spark prevention, and FIG. 7 is an exemplary diagram showing spark prevention in a notch.

[0035] The configuration of a packaging material (1) for a microwave oven is described with reference to FIGS. 1 to 7.

[0036] A packaging material (1) for a microwave oven includes a packaging pack (10) and a temperature control unit (20). The packaging pack (10) includes an electromagnetic wave shielding layer (12) made of a metal thin film including an electromagnetic wave shielding control material, and forms a food receiving space for receiving food. The packaging pack (10) includes an outer surface film layer (11), an electromagnetic wave shielding layer (12), a functional layer (13), a heat-bonding layer (14), and a notch (15).

[0037] The outer surface film layer (11) may be made of a printable material.

[0038] The electromagnetic wave shielding layer (12) is laminated on the inner side of the outer surface film layer (11) and can block oxygen, moisture, light and electromagnetic waves. By controlling the type of electromagnetic wave shielding control material and the type of coating material of the electromagnetic wave shielding layer (12), electromagnetic waves can be blocked, and the occurrence of sparks can be prevented by utilizing the shape of the packaging material, thereby minimizing the influence of food on electromagnetic waves and at the same time increasing safety during cooking.

[0039] The electromagnetic wave shielding control material may be at least one of aluminum, stainless steel, and ferrite, but is not limited thereto. The electromagnetic wave shielding control material may be coated with a non-conductive material having a low dielectric constant. That is, the electromagnetic wave shielding control material can prevent sparking caused by microwaves reflected from the metal by coating it with a non-conductive material. The non-conductive material may be any conventional non-conductive material, and may be any non-conductive material having a low dielectric constant.

[0040] The electromagnetic wave shielding control material can be cut to position the metal material inside the coated paper without exposing the metal to the outside by cutting the edges. Depending on the shape of the packaging material, sparking due to reflection of microwaves generated from the metal film can be minimized. Sparking is reduced as the material is smoother without protruding parts, and can also be reduced as the material becomes thicker. However, even if the material is smooth without protruding parts, sparking can easily occur if there are sharp or protruding parts adjacent to the outside. Therefore, the shape of the packaging material can be cut to position the metal material inside the coated paper without exposing the metal to the outside by cutting the edges of the metal film, thereby minimizing the occurrence of sparks.

[0041] The functional layer (13) is laminated on the inner side of the electromagnetic wave shielding layer (12) and can separate adjacent electromagnetic wave shielding layers when thermally bonded. At this time, the functional layer (13) may be a heat-resistant insulating layer.

[0042] The thermal bonding layer (14) is a layer that is laminated on the inside of the functional layer (13) and is thermally bonded when thermally bonded.

[0043] A notch (15) may be formed on the upper edge to facilitate opening of the packaging pack (10).

[0044] The temperature control unit (20) is configured to control the temperature of food accommodated in the food receiving space by penetrating through multiple areas of the electromagnetic wave shielding layer (12). The temperature control unit (20) can control the temperature of food accommodated in the food receiving space based on at least one of the penetration area formed through multiple areas of the electromagnetic wave shielding layer (12) and the thickness of the electromagnetic wave shielding layer (12). The temperature control unit (20) includes a penetration hole (21) and a slot (22) (see FIG. 5).

[0045] When the temperature control unit (20) is formed with a plurality of through holes (21) of the same diameter, the temperature of food received in the food receiving space can be controlled according to the number of the plurality of through holes (21) and the diameter of the plurality of through holes (21).

[0046] When the temperature control unit (20) is formed of a plurality of slots (22) at equal intervals, the temperature of food received in the food receiving space can be controlled according to the number of the plurality of slots (22) and the interval between the plurality of slots (22).

[0047] Figure 1 is an example of temperature rise according to the number, hole diameter, and thickness of the through holes (21) of the microwave oven packaging material (1) according to the present invention.

[0048] Fig. 1 (a) As the number of through holes (21) of the microwave oven packaging material (1) increases and there is no shielding, the temperature rise due to the microwave oven is greater.

[0049] Fig. 1 (b) As the hole diameter of the through hole (21) of the microwave oven packaging material (1) increases and there is no shielding, the temperature rise due to the microwave oven increases.

[0050] Fig. 1 (c) As the thickness of the microwave packaging material (1) increases, the blocking of electromagnetic waves increases, so the temperature rise is small.

[0051] Figure 2 is an example using packaging material (1) for a microwave oven.

[0052] Fig. 2 (a) The frozen kimchi and frozen ssamjang on the upper side were exposed to a microwave oven, so the temperature rose to 50°C and 60°C due to the microwave oven's electromagnetic waves.

[0053] Fig. 2 (b) In contrast, since the frozen kimchi and frozen ssamjang on the upper side are packaged using a microwave-safe packaging material (1) according to the present invention, the amount of heating is relatively small compared to other parts, and the temperature does not rise to 10°C and 25°C.

[0054] Figure 3 is an example of the structure of a packaging pack (10).

[0055] The functional layer (13) on the left does not have a through hole formed, but the functional layer (13) on the right has a through hole formed. Various patterns are possible, such as circles, squares, ovals, grids, and meshes.

[0056] Figure 4 is an example of a slot-shaped temperature control unit (20).

[0057] Fig. 4 (a) The electromagnetic wave shielding layer (12) is formed with slots (22) rather than perforations in a striped pattern.

[0058] Fig. 4 (b) An electromagnetic wave shielding layer (12) having slots (22) formed in a striped pattern rather than perforations can be manufactured by laminating together with an outer surface film layer (11), a functional layer (13), and a heat-bonding layer (14). When the electromagnetic wave shielding layer (12) is formed with a plurality of slots, it can be manufactured by laminating together with an outer surface film layer (11), a functional layer (13), and a heat-bonding layer (14) by rolling. Here, laminating can be done using an adhesive.

[0059] Figure 5 is an example of a temperature control unit of a microwave oven packaging material.

[0060] Fig. 5 (a) The temperature control unit (20) can be formed with a plurality of through holes (21) of the same diameter.

[0061] Fig. 5 (b) The temperature control unit (20) can be formed with a plurality of slots (22) of equal spacing. In this case, the packaging material for a microwave oven can be manufactured as shown in Fig. 4.

[0062] Figure 6 is an example diagram for preventing sparks.

[0063] When two metals are placed close together, a spark is created as electrons move through the short non-metallic region.

[0064] Fig. 6 (a) When two thermal bonding layers (14) are mutually thermally bonded to thermally bond two packaging packs (10) in two layers, two heat-resistant insulating functional layers (13) are placed between two electromagnetic wave blocking layers (12) to be spaced apart at a predetermined interval. This is an example of spacing out the electromagnetic wave blocking layers (12) by maintaining the thickness when thermally bonding two packaging packs (10) in two layers, thereby fundamentally blocking the movement of electrons.

[0065] Fig. 6 (b) In the case where two thermal bonding layers (14) are mutually thermally bonded to form two packaging packs (10) in two layers, the two functional layers (13) are not arranged so that the two electromagnetic wave blocking layers (12) are in close contact with each other. In the case of thermal bonding, this is an example of a method in which two electromagnetic wave blocking layers (12) are in close contact over a wide area so as not to impede the flow of electrons, thereby completely contacting each other so that electrons move freely without interference and sparks are not generated.

[0066] Fig. 6 (c) When two thermal bonding layers (14) are mutually thermally bonded to form two packaging packs (10) in a double layer, an electromagnetic wave shielding layer (12) is not placed on one of the two packaging packs (10) in the thermally bonded area. In the case of thermal bonding, an example of an electromagnetic wave shielding layer (12) using a non-shielding pattern being spaced apart is a method in which one side of the electromagnetic wave shielding layer (12) of the thermally contacted portion is removed and the electromagnetic wave shielding layer (12) is maintained from the point where the contact ends to separate them.

[0067] Fig. 7 is an example of spark prevention in a notch (15).

[0068] Fig. 7 (a) is an example of changing the existing angled notch to a curved one. When a notch (15) is formed on a packaging pack (10), the shape of the notch (15) is formed so as not to have sharp parts. This can prevent sparks generated by sharp parts.

[0069] Fig. 7 (b) Using a non-shielding pattern, the notch (15) does not use an electromagnetic wave shielding layer (12). When a notch (15) is formed in the packaging pack (10), the electromagnetic wave shielding layer (12) is not placed in the area where the notch (15) is formed, so the electromagnetic wave shielding layer (12) does not have a sharp part and is not exposed to the outside, thereby preventing sparks.

[0070] Here, we describe several examples of heating food using a microwave oven.

[0071] Room temperature foods (16-20°C): sauces (ssamjang, gochujang, etc.), chocolate, some desserts (cookies, macarons, etc.)

[0072] Warm foods (50-60°C): hamburgers, bread, boiled meat (boiled pork, pig's feet, etc.), meat side dishes, stir-fries, fried foods, electric current

[0073] Slightly hot foods (60-70°C): steak, pizza, coffee, rice, hot cooked vegetables, some soups, and warm desserts.

[0074] Hot foods (65-75°C): soups, stews, soups, ramen, hot tea (black tea, green tea, etc.), hot stews

[0075] Additionally, guidance on temperature rise can be displayed based on the area of ​​the through-holes and slots of the microwave-safe packaging material (1). In addition, guidance on temperature rise can be displayed based on the time of microwave use.

[0076] This allows you to heat different types of food to the desired temperature at once instead of having to heat them multiple times.

[0077] An example of guidance on the structure of a packaging pack (10) is described.

[0078] The outer surface film layer (11) can be mainly made of a printable material, including PET, OPP, KRAFT, BOPP, MOPP, SHFNWL, and KRT.

[0079] The electromagnetic wave shielding layer (12) is made of materials including VMPET, AL, and VMCPP and can block oxygen, moisture, and light. VMPET and VMCPP also have the function of radio wave shielding, but since they are mainly thinly deposited metals, they burn in the microwave oven. However, if they are deposited thickly, they can be used.

[0080] The functional layer (13) can be made of a material including PET, LLDPE, NY, CPR, CPP, VMCPP, PP, and EVOH. The functional layer (13) can be used for frozen products or vacuum-packed products as a tough film such as NY (nylon). For example, the functional layer (13) can be a heat-resistant insulating layer. Such a heat-resistant insulating layer can prevent sparks by spacing out electromagnetic wave shielding layers. In addition, the heat-resistant insulating layer can prevent wrinkling and tearing of the electromagnetic wave shielding layer, thereby preventing sparks. As another example, the functional layer (13) can be a functional layer for frozen products, a functional layer for high-temperature sterilization, an insulating functional layer, a vacuum functional layer, or a functional layer for reinforcing mechanical properties.

[0081] The thermal bonding layer (14) can be made of a material including LLDPE, CPP VMCPP, LDPE, EVA, PP, and EVOH.

[0082] Basically, it can be composed of an outer surface film layer (11) for printing, an electromagnetic wave shielding layer (12), a functional layer (13) that comes into contact with food for additional functions such as freezing, vacuum, sterilization, and insulation, and a heat-bonding layer (14).

[0083] Here, PET+LLDPE is used in the widest and most diverse applications, is microwaveable, and can be used to express transparent windows.

[0084] PET+NY+LLDPE is mainly used for frozen foods, liquids, and vacuum packaging, and can be used in microwave ovens and has transparent window expression.

[0085] PET+NY+CPR is suitable for applications where the contents are packaged at high temperatures, sterilization, and packaging materials are boiled directly in water. It is microwaveable and can be expressed with a transparent window.

[0086] KRAFT+LLDPE is a paper material that gives off a vintage feel, does not allow transparent windows, and cannot be used in microwave ovens.

[0087] OPP+CPP is mainly used for bread and ice cream packaging, and can have a transparent window effect.

[0088] OPP+VMCPP is mainly used in ramen and snack products, and blocks oxygen, light, and moisture to prevent oxidation of contents, and it is impossible to express a transparent window.

[0089] Figure 8 shows various examples of packaging packs.

[0090] Fig. 8 (a) The packaging pack may be in a three-sided shape. Fig. 8 (b) The packaging pack may be in a stand-up shape. Fig. 8 (c) The packaging pack may be in an M-shaped shape. Fig. 8 (d) The packaging pack may be in a T-shaped shape. Fig. 8 (e) The packaging pack may be manufactured in various other shapes.

[0091] Describes embodiments that can be modified other than the above embodiments.

[0092] A plurality of cutouts can be formed in the through-holes and slots of the temperature control unit to allow the user to control the temperature. By bending the cutouts to increase the open area before placing the unit in the microwave oven, the temperature can be heated to a higher temperature than the indicated temperature.

[0093] Additionally, a sticker comprising an electromagnetic shielding layer capable of closing the through-holes and slots may be further included. This allows the user to block the through-holes and slots using the sticker, thereby lowering the rising temperature.

[0094] Here, stickers can close perforations and slots and increase the thickness of the packaging pack, thereby preventing temperature rise in various ways.

[0095] By using the above microwave-safe packaging material (1), the temperature of the food can be prevented from rising by using the electromagnetic wave blocking layer, and the food can be heated appropriately by using the temperature control unit, so that the user can control the food to the desired temperature and eat it, thereby improving the user's satisfaction with food consumption.

[0096] Additionally, you can select the penetration area and thickness of the electromagnetic wave shielding layer depending on the type of food, allowing you to set the food to the desired temperature.

[0097] Additionally, as the number and diameter of the perforations increase, the food can be heated more quickly by the microwave oven, and as the number and diameter of the perforations decrease, the speed at which the food can be heated by the microwave oven decreases.

[0098] Additionally, as the number and spacing of slots increase, the food can be heated more quickly by the microwave oven, and as the number and spacing of slots decrease, the speed at which the food is heated by the microwave oven may decrease.

[0099] Additionally, food can be stored cleanly, heated, and consumed hygienically.

[0100] In addition, by separating the two electromagnetic wave shielding layers, the movement of electrons is blocked at the source, the two electromagnetic wave shielding layers are brought into complete close contact so that electrons can move freely without hindrance, and by removing one side of the electromagnetic wave shielding layer at the part where the thermal contact is attached and keeping the electromagnetic wave shielding layer from the point where the contact ends, sparks can be prevented from occurring.

[0101] In addition, sparks generated by sharp parts can be prevented, and sparks can be prevented because the electromagnetic wave shielding layer is not exposed to the outside.

[0102] Additionally, productivity can be improved by allowing temperature control in the form of slots rather than through holes.

Claims

1. For packaging materials for microwave ovens, A packaging pack comprising an electromagnetic wave blocking layer made of a metal film including an electromagnetic wave blocking control material and forming a food receiving space for receiving food; and A microwave-safe packaging material characterized by including a temperature control section formed through multiple regions of the electromagnetic wave shielding layer to control the temperature of food accommodated in the food accommodation space.

2. In paragraph 1, The above temperature control unit, A packaging material for a microwave oven, characterized in that the temperature of food accommodated in the food accommodation space is controlled based on at least one of a penetration area formed in multiple regions of the electromagnetic wave shielding layer and a thickness of the electromagnetic wave shielding layer.

3. In paragraph 2, A packaging material for a microwave oven, characterized in that when the temperature control section is formed with a plurality of through holes, the temperature of food accommodated in the food accommodation space is controlled according to the number of the plurality of through holes and the diameter of the plurality of through holes.

4. In paragraph 2, A packaging material for a microwave oven, characterized in that when the temperature control section is formed by a plurality of slots with equal spacing, the temperature of food accommodated in the food accommodation space is controlled according to the number of the plurality of slots and the spacing between the plurality of slots.

5. In paragraph 1, The above packaging pack is, Printable outer surface film layer; The electromagnetic wave blocking layer is laminated on the inner side of the outer surface film layer and blocks oxygen, moisture, light, and electromagnetic waves; A functional layer laminated on the inner side of the above electromagnetic wave shielding layer; and A packaging material for a microwave oven, characterized in that it comprises a heat-bonding layer that is heat-bonded to the inside of the functional layer and comes into contact with food.

6. In paragraph 5, A microwave-use packaging material characterized in that when two of the above thermal bonding layers are mutually thermally bonded to form two layers of the above packaging packs, two of the above functional layers are arranged between the two above electromagnetic wave shielding layers and are spaced apart by a predetermined interval.

7. In paragraph 5, A packaging material for a microwave oven, characterized in that when two of the above-mentioned thermal bonding layers are mutually thermally bonded to form two layers of the above-mentioned packaging packs, the two above-mentioned functional layers are not arranged so that the two above-mentioned electromagnetic wave shielding layers are in close contact with each other.

8. In paragraph 5, A packaging material for a microwave oven, characterized in that when two of the above-mentioned thermal bonding layers are mutually thermally bonded to form two layers of the above-mentioned packaging packs, the electromagnetic wave shielding layer is not arranged in one of the two above-mentioned packaging packs in the thermally bonded area.

9. In paragraph 1, A packaging material for a microwave oven, characterized in that when a notch is formed in the above packaging pack, the shape of the notch is formed so as not to have a sharp part.

10. In paragraph 1, A packaging material for a microwave oven, characterized in that when a notch is formed in the packaging pack, the electromagnetic wave shielding layer is not arranged in the area where the notch is formed.

11. In paragraph 5, A packaging material for a microwave oven, characterized in that the electromagnetic wave shielding layer is formed of a plurality of slots and is manufactured by rolling together with the outer surface film layer, the functional layer, and the heat-bonding layer.

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