Microwaveable heating package

Abstract

The utility model discloses a microwave heating packaging bag, including bag body and its setting exhaust area. The exhaust area is from inside to outside in proper order for inner layer, adhesive layer, release layer and outer layer. Inner layer is equipped with fourth knife line, and adhesive layer is equipped with the third knife line coincident with it, and release layer is equipped with the second knife line coincident with it, and outer layer is equipped with first knife line. The knife line encloses the area and is all located in release layer area. When microwave heating, the steam pressure in the bag breaks through the knife line of inner layer, adhesive layer and release layer in proper order, enters the clearance between release layer and outer layer, and finally breaks through the first knife line of outer layer and discharges, prevents the bag body explosion. Release layer reduces the adhesion between outer layer and adhesive layer, and is favorable to steam diffusion. When daily storage, the outer layer and release layer other parts are closely bonded, ensure good sealing property, prolong food shelf life.

Description

Technical Field

[0001] This utility model relates to the field of food packaging technology, and in particular to a microwave-heatable packaging bag. Background Technology

[0002] With the widespread use of microwave ovens, microwaveable foods that can be heated in a microwave oven have also emerged. For ease of transportation, microwaveable foods are usually placed in sealed packaging bags. However, when these sealed bags are placed directly in a microwave oven for heating, the liquid water turns into high-temperature steam, which can cause excessive pressure inside the bag and lead to an explosion. Therefore, when eating these foods, it is necessary to remove them from the packaging bags and place them in a non-sealed container before microwave heating them. This process is rather cumbersome, and foods placed in non-sealed containers are also more susceptible to external contamination.

[0003] Existing microwave-heating packaging bags typically use snap-lock vents. While these bags can achieve the purpose of heating and venting, they cannot provide a seal, which can easily lead to spoilage of packaged food during transportation, resulting in a short shelf life and compromising food safety. Utility Model Content

[0004] This utility model provides a microwave-heatable packaging bag, which aims to solve the problem that although existing packaging bags can achieve the function of heating and venting, they cannot achieve the function of sealing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides a microwave-heatable packaging bag, including: a bag body, wherein the bag body is provided with a venting area, and the venting area includes an inner layer, an adhesive layer, a release layer and an outer layer arranged sequentially from the inside to the outside; The outer layer is provided with a first cutting line, and the area enclosed by the first cutting line is entirely located within the area of ​​the release layer. The inner layer is provided with a fourth cutting line, and the area enclosed by the fourth cutting line is entirely located within the area of ​​the release layer. The adhesive layer has a third cutting line that coincides with the fourth cutting line, and the release layer has a second cutting line that coincides with the third cutting line.

[0006] In one embodiment, the area enclosed by the fourth cutting edge is located within the area enclosed by the first cutting edge.

[0007] In one embodiment, the first cutter line is a discontinuous closed arc, and the fourth cutter line is a plurality of non-closed intersecting line segments.

[0008] In one embodiment, the fourth cutting line is in the shape of a cross.

[0009] In one embodiment, the first cutting line is a discontinuous closed arc, and the fourth cutting line is a continuous closed arc; the release layer has a plurality of first through holes in the area enclosed by the second cutting line, and the outer layer and the adhesive layer are bonded together through the plurality of first through holes.

[0010] In one embodiment, the first cutter line is circular.

[0011] In one embodiment, both the first cutting line and the fourth cutting line are circular.

[0012] In one embodiment, a plurality of the first through holes are evenly distributed within the area enclosed by the second cutting line.

[0013] In one embodiment, the area enclosed by the first cutter line and the area enclosed by the fourth cutter line do not overlap; A plurality of second through holes are provided within the area enclosed by the second cutting line, and the plurality of second through holes are evenly distributed within the area enclosed by the second cutting line; the outer layer is bonded to the adhesive layer through the plurality of second through holes.

[0014] In one embodiment, the area enclosed by the first cutting line and the fourth cutting line is circular, and there are several areas enclosed by the first cutting line, which are evenly distributed around the area enclosed by the fourth cutting line.

[0015] The beneficial effects of this invention compared to existing technologies are as follows: In this embodiment, the exhaust zone is configured as an inner layer, an adhesive layer, a release layer, and an outer layer. A first cutting line is provided on the outer layer, and a second, third, and fourth overlapping cutting lines are provided on the release layer, adhesive layer, and inner layer, respectively. The release layer can separate the outer layer and the adhesive layer, reducing the adhesive force between the adhesive layer and the outer layer. Therefore, during microwave heating, as the pressure inside the bag increases, the steam inside the bag will pass through the fourth, third, and second cutting lines in sequence, and then be discharged from the first cutting line, thereby avoiding an explosion caused by microwave heating.

[0016] In daily use, the outer layer and release layer, except for the first and second cut lines, are all bonded together, which can provide a good sealing function, improve the sealing and preservation effect of food, and extend the shelf life of food.

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this utility model more obvious and understandable, the following are preferred embodiments, which are described in detail below. Attached Figure Description

[0018] Figure 1 A front view of a microwave-heated packaging bag provided for an embodiment of this utility model; Figure 2 A cross-sectional structural diagram of a microwave-heated packaging bag provided for an embodiment of this utility model; Figure 3 A top view of a microwave-heated packaging bag provided for an embodiment of this utility model; Figure 4 A first state diagram of a microwave-heated packaging bag during the heating process, provided for an embodiment of this utility model; Figure 5 A second state diagram of a microwave-heated packaging bag during the heating process is provided for an embodiment of this utility model; Figure 6 A third state diagram of a microwave-heated packaging bag during the heating process, provided for an embodiment of this utility model; Figure 7 A cross-sectional view of Embodiment 2 of a microwave-heated packaging bag provided for the present utility model; Figure 8 A top view of Embodiment 2 of a microwave-heated packaging bag provided for the present utility model; Figure 9 A first state diagram during the heating process of Embodiment 2 of a microwave-heated packaging bag provided for this utility model embodiment; Figure 10 A second state diagram during the heating process of an embodiment 2 of a microwave-heated packaging bag provided by this utility model; Figure 11 A third state diagram during the heating process of an embodiment 2 of a microwave-heated packaging bag provided by this utility model; Figure 12 A cross-sectional view of Embodiment 3 of a microwave-heated packaging bag provided as an embodiment of this utility model; Figure 13 A top view of Embodiment 3 of a microwave-heated packaging bag provided for the present utility model; Figure 14 A cross-sectional view of another embodiment of a microwave-heated packaging bag provided in Embodiment 3 of this utility model; Figure 15 This is a top view of another embodiment of a microwave-heated packaging bag provided in Embodiment 3 of this utility model.

[0019] Figure label: 1. Outer layer; 11. First cut line; 2. Release layer; 21. Second cut line; 22. First through hole; 23. Second through hole; 3. Adhesive layer; 31. Third cut line; 4. Inner layer, 41. Fourth cutter line; 5. Bag body. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0022] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0023] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0024] Example 1: Please refer to Figure 1-15 This utility model provides a microwave-heated packaging bag, including: a bag body 5, the bag body 5 having a venting area, the venting area including an inner layer 4, an adhesive layer 3, a release layer 2 and an outer layer 1 arranged sequentially from the inside to the outside; The outer layer 1 is provided with a first cutting line 11, and the area enclosed by the first cutting line 11 is entirely located within the area of ​​the release layer 2; The inner layer 4 is provided with a fourth cutting line 41, and the area enclosed by the fourth cutting line 41 is entirely located within the area of ​​the release layer 2. The adhesive layer 3 has a third cutting line 31 that coincides with the fourth cutting line 41, and the release layer 2 has a second cutting line 21 that coincides with the third cutting line 31.

[0025] In this embodiment, the venting zone is configured as an inner layer 4, an adhesive layer 3, a release layer 2, and an outer layer 1. A first cutting line 11 is provided on the outer layer 1, and overlapping second cutting lines 21, third cutting lines 31, and fourth cutting lines 41 are provided on the release layer 2, adhesive layer 3, and inner layer 4, respectively. The release layer 2 can separate the outer layer 1 and the adhesive layer 3, reducing the adhesive force between the adhesive layer 3 and the outer layer 1. Thus, during microwave heating, as the pressure inside the bag 5 increases, the steam inside the bag 5 will pass through the fourth cutting line 41, the third cutting line 31, and the second cutting line 21 in sequence, and then be discharged from the first cutting line 11, thereby preventing an explosion due to microwave heating. In daily use, the outer layer 1 and the release layer 2, except for the first cutting line 11 and the second cutting line 21, are all bonded together, providing a good sealing function, improving the sealing and preservation effect of food, and extending the shelf life of food.

[0026] In one embodiment, such as Figures 2 to 6 As shown, the area enclosed by the fourth cutting line 41 is located within the area enclosed by the first cutting line 11. In this embodiment, the first cutting line 11 is a circular arc.

[0027] In this embodiment, the area enclosed by the first cutting line 11 is larger than the area enclosed by the fourth cutting line 41.

[0028] Specifically, such as Figure 3 As shown, the first cutter line 11 is a discontinuous closed arc, and the fourth cutter line 41 is a number of non-closed intersecting line segments.

[0029] In this embodiment, the first cutting line 11 is a discontinuous closed arc, thereby forming a circular area on the outer layer 1. Since the first cutting line 11 is a discontinuous closed arc, the connection between the area of ​​the outer layer 1 within the first cutting line 11 and the outer layer 1 can be stronger, preventing the area within the first cutting line 11 from automatically detaching during daily use.

[0030] like Figure 4 As shown, when the pressure inside the bag 5 increases, steam will successively rush out from the fourth cutter line 41, the third cutter line 31, and the second cutter line 21, breaking through the fourth cutter line 41, the third cutter line 31, and the second cutter line 21, and then gradually breaking open the part between the release layer 2 and the outer layer 1 (as shown). Figure 5 As shown), the pressure inside the bag 5 separates the release layer 2 and the outer layer 1, and finally breaks through the discontinuous first cutting line 11 (as shown). Figure 6 As shown), the pressure inside bag 5 is released.

[0031] Therefore, in this embodiment, the first cut line 11 is set as a discontinuous closed arc, which can ensure that the pressure inside the bag 5 can be released smoothly after the pressure increases, and at the same time, it can prevent the area inside the first cut line 11 from directly separating from the outer layer 1 during daily use.

[0032] In addition, the fourth cutting line 41 in this embodiment is in the shape of a cross.

[0033] The fourth cut line 41 is designed in a cross shape, which reduces the possibility of food leakage from the bag 5 through the fourth cut line 41 during daily storage, thus improving the sealing and preservation effect. At the same time, during use, the pressure inside the bag 5 can easily rush outward from the middle position of the cross-shaped fourth cut line 41. After the pressure breaks through the fourth cut line 41, the third cut line 31, and the second cut line 21, since the first cut line 11 is circular, the steam between the release layer 2 and the outer layer 1 can break through to the position of the first cut line 11 regardless of which direction it rushes, ensuring that the pressure inside the bag 5 can be released smoothly.

[0034] Example 2: This example has a similar structure to Example 1, except that, as shown in Example 2... Figure 7 and Figure 8 As shown, the area enclosed by the fourth cutting line 41 is located within the area enclosed by the first cutting line 11.

[0035] The first cutting line 11 is a discontinuous closed arc, and the fourth cutting line 41 is a continuous closed arc; the release layer 2 is provided with a plurality of first through holes 22 in the area enclosed by the second cutting line 21, and the outer layer 1 and the adhesive layer 3 are bonded together through the plurality of first through holes 22.

[0036] like Figure 8 As shown, in this embodiment, the first cutting line 11 is a circular arc. The fourth cutting line 41 is also a circular arc. The first cutting line 11 surrounds the fourth cutting line 41.

[0037] like Figure 9 As shown, in this embodiment, the central region of the first cutting edge 11 is bonded together with the adhesive layer 3 through the first through hole 22. Figure 10 As shown, when the pressure inside the bag 5 increases, the pressure inside the bag 5 will push the fourth cutting line 41, the third cutting line 31, and the second cutting line 21 outwards. Finally, the steam will push open the part between the release layer 2 and the outer layer 1 until the pressure diffuses outwards and pushes open the first cutting line 11 (as shown). Figure 11 As shown), at this time, the outer layer 1 region in the first cutting line 11, the release layer 2 region in the second cutting line 21, the adhesive layer 3 region in the third cutting line 31, and the inner layer 4 region in the fourth cutting line 41 are bonded together and separated from the bag body 5, so that the pressure inside the bag body 5 can be released smoothly.

[0038] like Figures 7 to 11 As shown, in this embodiment, the plurality of first through holes 22 are evenly distributed within the area enclosed by the second cutting line 21. This allows for even distribution between the outer layer 1 region within the first cutting line 11 and the adhesive layer 3 region between the third cutting line 31, improving the adhesion strength of the outer layer 1 region within the first cutting line 11 and the adhesive layer 3 region within the third cutting line 31.

[0039] like Figures 7 to 11 As shown, in this embodiment, to improve the adhesion between the area within the first cutting line 11 and the adhesive layer 3, only one first through hole 22 is provided within the area within the second cutting line 21. The circular area of ​​the first through hole 22 is smaller than the area of ​​the second cutting line 21, thereby maximizing the adhesion area between the outer layer 1 area within the first cutting line 11 and the adhesive layer 3. This ensures that during the microwave heating of the bag body 5, the outer layer 1 area within the first cutting line 11, the release layer 2 area within the second cutting line 21, the adhesive layer 3 area within the third cutting line 31, and the inner layer 4 area within the fourth cutting line 41 can adhere to form a unified structure, so that when subjected to pressure from the bag body 5, they can be pushed open together and separated from the bag body 5.

[0040] Example 3: This example is similar in structure to Example 1 or Example 2, except that, as Figure 12 and Figure 13 As shown, the area enclosed by the first cutting line 11 and the area enclosed by the fourth cutting line 41 do not overlap; a plurality of second through holes 23 are provided in the area enclosed by the second cutting line 21, and the plurality of second through holes 23 are evenly distributed in the area enclosed by the second cutting line 21; the outer layer 1 is bonded to the adhesive layer 3 through the plurality of second through holes 23.

[0041] In this embodiment, the areas enclosed by the first cutting line 11 and the fourth cutting line 41 do not overlap, thus allowing them to be completely staggered, which can achieve a good sealing function, improve the sealing and preservation effect of food, and extend the shelf life of food.

[0042] Furthermore, during use, the pressure inside the bag body 5 will rush outward along the fourth cut line 41, the third cut line 31, and the second cut line 21, and finally move along the release layer 2 and the outer layer 1, eventually breaking through the area inside the first cut line 11, thereby releasing the pressure inside the bag body 5.

[0043] Because a number of second through holes 23 are provided in the area within the second cut line 21, the outer layer 1 can be connected to the adhesive layer 3 in the third cut line 31 through the second through holes 23, so that the inner layer 4 in the area of ​​the fourth cut line 41, the adhesive layer 3 in the third cut line 31, and the release layer 2 in the second cut line 21 are bonded to the outer layer 1 to form a whole, and the inner layer 4 in the fourth cut line 41 will not fall into the bag body 5.

[0044] In a further embodiment, such as Figure 14 and Figure 15 As shown, the area enclosed by the first cutting line 11 and the fourth cutting line 41 is circular. There are several areas enclosed by the first cutting line 11, and these areas are evenly distributed around the area enclosed by the fourth cutting line 41.

[0045] The area enclosed by several first cut lines 11 is set outside the area of ​​the fourth cut line 41, so that when the pressure inside the bag body 5 expands to the space between the release layer 2 and the outer layer 1, there will be a corresponding first cut line 11 regardless of which direction the pressure expands, so that the pressure inside the bag body 5 can diffuse outward smoothly.

[0046] This invention achieves safe heating and daily sealing by setting a composite venting zone on the bag body 5, consisting of an inner layer 4, an adhesive layer 3, a release layer 2, and an outer layer 1.

[0047] When heated by microwave, steam is generated inside the bag, causing the pressure to rise. The steam will break through the preset weak points (i.e., the fourth cut line 41 of the inner layer 4, the third cut line 31 of the adhesive layer 3, and the second cut line 21 of the release layer 2) in sequence and enter the gap between the release layer 2 and the outer layer 1. Since the release layer 2 reduces the adhesion between the outer layer 1 and the adhesive layer 3, the steam can diffuse in this gap and eventually break through the first cut line 11 of the outer layer 1 to escape, thereby preventing the bag 5 from exploding.

[0048] During routine storage, apart from the slits, the outer layer 1 and release layer 2 are tightly bonded together, ensuring excellent sealing of the packaging bag and effectively extending the shelf life of the food. Furthermore, by designing slits of different shapes (such as discontinuous arcs and cross shapes) and different relative positions (such as internal, external, and peripheral distribution), and using through holes to locally strengthen the adhesion between specific layers, this design further optimizes its ability to rupture and release air as a whole under pressure, while preventing internal material fragments from falling into the food.

[0049] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A microwave-heatable packaging bag, characterized in that, include: The bag body has a venting area, which includes an inner layer, an adhesive layer, a release layer and an outer layer arranged from the inside to the outside. The outer layer is provided with a first cutting line, and the area enclosed by the first cutting line is entirely located within the area of ​​the release layer. The inner layer is provided with a fourth cutting line, and the area enclosed by the fourth cutting line is entirely within the area of ​​the release layer. The adhesive layer has a third cutting line that coincides with the fourth cutting line, and the release layer has a second cutting line that coincides with the third cutting line.

2. The microwave-heated packaging bag according to claim 1, characterized in that, The area enclosed by the fourth cutting edge is located within the area enclosed by the first cutting edge.

3. The microwave-heated packaging bag according to claim 2, characterized in that, The first cutter line is a discontinuous closed arc, and the fourth cutter line is a number of non-closed intersecting line segments.

4. The microwave-heated packaging bag according to claim 3, characterized in that, The fourth cutting line is in the shape of a cross.

5. The microwave-heated packaging bag according to claim 2, characterized in that, The first cutting line is a discontinuous closed arc, and the fourth cutting line is a continuous closed arc; the release layer has a plurality of first through holes in the area enclosed by the second cutting line, and the outer layer and the adhesive layer are bonded together through the plurality of first through holes.

6. The microwave-heated packaging bag according to claim 2 or 3, characterized in that, The first cutting line is circular.

7. The microwave-heated packaging bag according to claim 5, characterized in that, Both the first cutting line and the fourth cutting line are circular.

8. The microwave-heated packaging bag according to claim 5, characterized in that, Several of the first through holes are evenly distributed within the area enclosed by the second cutter line.

9. The microwave-heated packaging bag according to claim 1, characterized in that, The area enclosed by the first cutting edge and the area enclosed by the fourth cutting edge do not overlap; A plurality of second through holes are provided within the area enclosed by the second cutting line, and the plurality of second through holes are evenly distributed within the area enclosed by the second cutting line; the outer layer is bonded to the adhesive layer through the plurality of second through holes.

10. The microwave-heated packaging bag according to claim 9, characterized in that, The areas enclosed by the first cutting line and the fourth cutting line are both circular. There are several areas enclosed by the first cutting line, and these several areas are evenly distributed around the area enclosed by the fourth cutting line.

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