Packaging bag convenient to exhaust for microwave oven
By designing a breathable structure with a permeable channel that fails at high temperatures and a sponge layer for filtration in microwave-safe packaging bags, the risk of explosion and contamination during heating of the packaging bags is solved, achieving both safe ventilation and food hygiene.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENZHOU WENJIU PACKING CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-12
AI Technical Summary
Existing microwave oven packaging bags pose a risk of explosion during heating, have poor ventilation and are prone to contamination, and are easily broken or exploded during transportation.
A microwave oven packaging bag has been designed, comprising an inner cavity, a sealing unit, and a ventilation channel. The ventilation channel is closed under normal conditions and fails at high temperatures, forming an exhaust structure. The ventilation channel is composed of multiple ventilation modules and is equipped with a sponge layer to filter contaminants and deodorizing particles.
It achieves safe air permeability during high-temperature heating, avoids explosion, prevents external contaminants from entering, maintains food hygiene, and maintains airtightness at room temperature.
Smart Images
Figure CN224225676U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging bags, specifically to a microwave oven packaging bag that facilitates venting. Background Technology
[0002] Packaging bags are bags used to package various items, making it convenient and easy to transport materials during production and distribution. Currently, most food is packaged in packaging bags. When heating food in a microwave oven, if the packaging bag is not opened and placed directly into the microwave, although this can prevent moisture loss, it may explode due to internal steam pressure. Therefore, consumers need to take the food out and place it on a plate before heating it in the microwave, which is a cumbersome process. Furthermore, placing the food on a plate exposes it to bacteria in the microwave.
[0003] The prior art, patent application number 2021222706065, describes a convenient microwave oven packaging bag for easy venting, comprising an outer packaging bag body and an inner bag body. The outer packaging bag body includes an outer film layer and a resin adhesive layer. The resin adhesive layer is disposed on the inner surface of the outer film layer, and circular holes are disposed at both ends of the surface of the outer film layer. The resin adhesive layer is located on the bottom outside of the circular holes. The inner bag body is disposed on the inner surface of the resin adhesive layer, and the inner bag body includes an inner connecting film layer and an inner barrier layer.
[0004] The existing technical solution achieves the microwave oven heating and venting effect of the packaging bag by having the low-density easy-tear film layer explode under gas expansion pressure after being heated to a certain degree, allowing gas to escape through a circular hole. However, this technical solution has the following problems: First, the low-density easy-tear film layer needs to expand and explode during venting, which poses a corresponding explosion risk; second, the circular hole after the explosion directly connects to the outside, which can easily allow external contaminants to directly affect the food inside the packaging bag; finally, if the strength of the low-density easy-tear film layer is too low, it is easy for the low-density easy-tear film layer to break during transportation, thus contaminating the food inside the packaging bag; if the strength of the low-density easy-tear film layer is too high, it is easy to make the explosion of the low-density easy-tear film layer difficult, affecting the ventilation effect. Summary of the Invention
[0005] To address the aforementioned problems, this invention provides a microwave oven packaging bag that facilitates venting:
[0006] A microwave oven packaging bag for easy venting includes a bag body with an inner cavity. A sealing unit is located at one end of the bag body. The sealing unit includes a first sealing bag layer and a second sealing bag layer that are sealed together. The sealing unit is divided into a first sealing area and a second sealing area. The first sealing area has a first transverse ventilation channel and a first longitudinal ventilation channel, the first longitudinal ventilation channel connecting the first transverse ventilation channel and the inner cavity. The second sealing area has a second longitudinal ventilation channel, the second longitudinal ventilation channel connecting the first transverse ventilation channel and the outside. A first adhesive layer that fails at high temperatures is provided between the first sealing bag layer and the second sealing bag layer corresponding to the first or second longitudinal ventilation channel, wherein the high temperature is above 80°C.
[0007] Under normal conditions, the first longitudinal ventilation channel or the second longitudinal ventilation channel is in a closed state. When the temperature is above 80°C, the first adhesive layer fails, and the inner cavity, the first longitudinal ventilation channel, the first transverse ventilation channel, the second longitudinal ventilation channel, and the outside are sequentially connected to form an exhaust structure for ventilation of the inner cavity.
[0008] Preferably, the second sealing area is further provided with a second transverse ventilation channel that corresponds to and is adapted to the first transverse ventilation channel. The first transverse ventilation channel, the first longitudinal ventilation channel, the second transverse ventilation channel, and the second longitudinal ventilation channel are all one or more.
[0009] Preferably, there are multiple first transverse air vents, first longitudinal air vents, second transverse air vents, and second longitudinal air vents, and these multiple air vents of the same type are isolated from each other by heat pressing or bonding. In this technical solution, if all the air vents of the same type are first transverse air vents, the individual first transverse air vents are isolated from each other by heat pressing or bonding.
[0010] Preferably, the first longitudinal ventilation channel is composed of multiple ventilation modules, which are disposed between adjacent first transverse ventilation channels. The ventilation modules are used for interconnection between the inner cavity and the first transverse ventilation channels and between adjacent first transverse ventilation channels. Each ventilation module is composed of multiple ventilation ports evenly arranged, with the ventilation ports of adjacent ventilation modules being staggered.
[0011] Preferably, the first adhesive layer is disposed in the second longitudinal ventilation channel, and there is one second longitudinal ventilation channel. When the bag is located at a high temperature above 80°C, the first adhesive layer loses its adhesiveness. The inner cavity, the first longitudinal ventilation channel, the first transverse ventilation channel, the second longitudinal ventilation channel, and the outside are sequentially connected to form an exhaust structure for ventilation of the inner cavity.
[0012] Preferably, the first adhesive layer is made of any one of low-density polyethylene, ethylene-vinyl acetate copolymer, water-based acrylic adhesive, or polyvinyl acetate. All of these materials can meet the requirement of adhesive failure at high temperatures while remaining safe and pollution-free.
[0013] Preferably, a sponge layer is provided between the first and second sealing bag layers corresponding to the first longitudinal ventilation channel. The sponge layer is bonded to the first and second sealing bag layers by a second adhesive layer. The sponge layer is made of natural wood cellulose sponge, food-grade PU sponge, food-grade silicone sponge, or PE foam sponge, and high-temperature activated carbon deodorizing particles are attached to the sponge layer. The second adhesive layer in this technical solution is an adhesive layer that will not fail at high temperatures, such as polypropylene or PVDC. The sponge layer has three effects: first, it can maintain the open ventilation effect of the first longitudinal ventilation channel and avoid the adhesion and closure of the first longitudinal ventilation channel from affecting the ventilation effect; second, it is used to filter pollutant particles or gases flowing in the inner cavity or outside; third, it is used for the stable adhesion of high-temperature activated carbon deodorizing particles, which facilitates the removal of odors.
[0014] Beneficial effects: Under normal conditions, the first longitudinal ventilation channel or the second longitudinal ventilation channel is bonded by the first adhesive layer, so the exhaust structure is in a closed state. However, when this product is placed in a high temperature such as a microwave oven, the first adhesive layer will fail during the heating process. At this time, the inner cavity, the first longitudinal ventilation channel, the first transverse ventilation channel, the second longitudinal ventilation channel, and the outside are connected in sequence to form an exhaust structure for the ventilation of the inner cavity. This allows the gas that expands in the inner cavity to be discharged through the exhaust structure, preventing the bag from expanding and exploding. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of Example 1.
[0016] Figure 2 This is a front view schematic diagram of Example 1.
[0017] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.
[0018] Figure 4 This is a side view of Example 2.
[0019] Figure 5 for Figure 4 Enlarged diagram of point B in the middle.
[0020] Figure 6 This is a partial cross-sectional enlarged view of Example 2.
[0021] Reference numerals: 1. Bag body; 2. Inner cavity; 3. First sealing bag layer; 4. Second sealing bag layer; 5. First sealing area; 6. Second sealing area; 7. First transverse ventilation channel; 8. First longitudinal ventilation channel; 9. Second transverse ventilation channel; 10. Second longitudinal ventilation channel; 11. First adhesive layer; 12. Sponge layer. Detailed Implementation
[0022] The following is in conjunction with the appendix Figure 1-6 The present invention will be further described with reference to Examples 1-2.
[0023] Example 1: As Figure 1-3 As shown, a microwave oven packaging bag for easy venting includes a bag body with an inner cavity. A sealing unit is located at one end of the bag body. The sealing unit includes a first sealing bag layer and a second sealing bag layer that are sealed together. The sealing unit is divided into a first sealing area and a second sealing area. The first sealing area has a first transverse ventilation channel and a first longitudinal ventilation channel. The first longitudinal ventilation channel connects to the first transverse ventilation channel and the inner cavity. The second sealing area has a second transverse ventilation channel and a second longitudinal ventilation channel. The second transverse ventilation channel corresponds to and is connected to the first transverse ventilation channel. The second longitudinal ventilation channel connects to the first transverse ventilation channel and the outside. A first adhesive layer that fails at high temperatures (above 80°C) is provided between the first sealing bag layer and the second sealing bag layer corresponding to the first or second longitudinal ventilation channel. Multiple first transverse ventilation channels, first longitudinal ventilation channels, second transverse ventilation channels, and second longitudinal ventilation channels are present. These multiple ventilation channels of the same type are isolated from each other by heat pressing or bonding. The ventilation channels of the same type described in this technical solution are all first transverse ventilation channels, and the first transverse ventilation channels are isolated from each other by heat pressing or bonding. The first longitudinal ventilation channel is composed of multiple ventilation modules, which are disposed between adjacent first transverse ventilation channels. The ventilation modules are used for interconnection between the inner cavity and the first transverse ventilation channels, and between adjacent first transverse ventilation channels. The ventilation modules are composed of multiple ventilation ports evenly arranged, and the ventilation ports of adjacent ventilation modules are staggered.
[0024] Under normal conditions, the first or second longitudinal air vent is closed. When the temperature exceeds 80℃, such as... Figure 3 As shown, the first adhesive layer fails, and the inner cavity, the first longitudinal ventilation channel, the first transverse ventilation channel, the second longitudinal ventilation channel, and the outside are sequentially connected to form an exhaust structure for ventilation of the inner cavity.
[0025] Example 2: As Figure 4-6As shown, a microwave oven packaging bag for easy venting includes a bag body with an inner cavity. A sealing unit is located at one end of the bag body, comprising a first sealing bag layer and a second sealing bag layer connected in a sealed manner. The sealing unit is divided into a first sealing area and a second sealing area. The first sealing area has a first transverse ventilation channel and a first longitudinal ventilation channel, the first longitudinal ventilation channel connecting the first transverse ventilation channel and the inner cavity. The second sealing area has a second longitudinal ventilation channel, connecting the first transverse ventilation channel and the outside. A first adhesive layer that fails at high temperatures is provided between the first sealing bag layer and the second sealing bag layer corresponding to the first or second longitudinal ventilation channel. The high temperature is above 80°C. The first adhesive layer is made of any one of low-density polyethylene, ethylene-vinyl acetate copolymer, water-based acrylic adhesive, or polyvinyl acetate. All of these materials can meet the requirement of adhesive failure at high temperatures and are safe and pollution-free. The same type of ventilation channel described in this technical solution is a first transverse ventilation channel, and the first transverse ventilation channels are isolated from each other by heat pressing or bonding.
[0026] Under normal conditions, either the first longitudinal ventilation channel or the second longitudinal ventilation channel is in a closed state. When the temperature exceeds 80℃, the first adhesive layer fails, and the inner cavity, the first longitudinal ventilation channel, the first transverse ventilation channel, the second longitudinal ventilation channel, and the outside are sequentially connected to form an exhaust structure for ventilation of the inner cavity. The first longitudinal ventilation channel is composed of multiple ventilation modules, which are arranged between adjacent first transverse ventilation channels. The ventilation modules are used for interconnection between the inner cavity and the first transverse ventilation channels, as well as between adjacent first transverse ventilation channels. Each ventilation module consists of multiple ventilation ports evenly arranged, with the ventilation ports of adjacent ventilation modules staggered.
[0027] like Figure 6 As shown, a sponge layer is provided between the first and second sealing bag layers corresponding to the first longitudinal ventilation channel. The sponge layer is bonded to the first and second sealing bag layers by a second adhesive layer. The sponge layer is made of natural wood cellulose sponge, food-grade PU sponge, food-grade silicone sponge, or PE foam sponge, and high-temperature activated carbon deodorizing particles are attached to the inside of the sponge layer. The second adhesive layer in this technical solution is an adhesive layer that will not fail at high temperatures, such as polypropylene or PVDC. The sponge layer has three effects: First, it can maintain the open ventilation effect of the first longitudinal ventilation channel and avoid the adhesion and closure of the first longitudinal ventilation channel from affecting the ventilation effect; second, it is used to filter pollutant particles or gases flowing in the inner cavity or outside; third, it is used for the stable adhesion of high-temperature activated carbon deodorizing particles, which facilitates the removal of odors.
[0028] Obviously, the above embodiments of this utility model are merely illustrative examples and not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.
Claims
1. A microwave oven packaging bag for easy venting, comprising a bag body (1), wherein the bag body (1) has an inner cavity (2), and a sealing unit is provided at the end of the bag body (1), wherein the sealing unit comprises a first sealing bag layer (3) and a second sealing bag layer (4) that are sealed to each other, characterized in that: The sealing unit is divided into a first sealing area (5) and a second sealing area (6) by region. The first sealing area (5) is provided with a first transverse ventilation channel (7) and a first longitudinal ventilation channel (8). The first longitudinal ventilation channel (8) is connected to the first transverse ventilation channel (7) and the inner cavity (2) respectively. The second sealing area (6) is provided with a second longitudinal ventilation channel (10). The second longitudinal ventilation channel (10) is connected to the first transverse ventilation channel (7) and the outside. A first adhesive layer (11) that fails at high temperature is provided between the first sealing bag layer (3) or the second sealing bag layer (4) corresponding to the first longitudinal ventilation channel (8) or the second longitudinal ventilation channel (10). The high temperature is above 80°C. Under normal conditions, the first longitudinal ventilation channel (8) or the second longitudinal ventilation channel (10) is in a closed state. When the temperature is above 80°C, the first adhesive layer (11) fails. The inner cavity (2), the first longitudinal ventilation channel (8), the first transverse ventilation channel (7), the second longitudinal ventilation channel (10), and the outside are connected in sequence to form an exhaust structure for ventilation of the inner cavity (2).
2. The microwave oven packaging bag for easy venting as described in claim 1, characterized in that: The second sealing area (6) is also provided with a second transverse ventilation channel (9) that is correspondingly connected and adapted to the first transverse ventilation channel (7). The first transverse ventilation channel (7), the first longitudinal ventilation channel (8), the second transverse ventilation channel (9) and the second longitudinal ventilation channel (10) are all one or more.
3. A microwave oven packaging bag for easy venting as described in claim 2, characterized in that: The first transverse ventilation channel (7), the first longitudinal ventilation channel (8), the second transverse ventilation channel (9), and the second longitudinal ventilation channel (10) are all multiple, and the multiple ventilation channels of the same type are isolated from each other by heat pressing or bonding.
4. A microwave oven packaging bag for easy venting as described in claim 1, characterized in that: The first longitudinal ventilation channel (8) is composed of multiple ventilation modules. The ventilation modules are arranged between adjacent first transverse ventilation channels (7). The ventilation modules are used for mutual communication between the inner cavity (2) and the first transverse ventilation channel (7) and between adjacent inner cavities (2) and the first transverse ventilation channel (7). The ventilation modules are composed of multiple ventilation ports evenly arranged, and the ventilation ports of adjacent ventilation modules are staggered.
5. A microwave oven packaging bag for easy venting as described in claim 1, characterized in that: The first adhesive layer (11) is disposed in the second longitudinal ventilation channel (10). There is one second longitudinal ventilation channel (10). When the bag body (1) is located at a high temperature above 80°C, the first adhesive layer (11) loses its adhesiveness. The inner cavity (2), the first longitudinal ventilation channel (8), the first transverse ventilation channel (7), the second longitudinal ventilation channel (10), and the outside are sequentially connected to form an exhaust structure for ventilation of the inner cavity (2).
6. A microwave oven packaging bag for easy venting as described in claim 1, characterized in that: The first adhesive layer (11) is made of any one of low-density polyethylene, ethylene-vinyl acetate copolymer, water-based acrylic adhesive or polyvinyl acetate.
7. A microwave oven packaging bag for easy venting as described in claim 1, characterized in that: A sponge layer (12) is provided between the first sealing bag layer (3) and the second sealing bag layer (4) corresponding to the first longitudinal ventilation channel (8). The sponge layer (12) is bonded to the first sealing bag layer (3) and the second sealing bag layer (4) through a second adhesive layer. The sponge layer (12) is made of natural wood cellulose sponge, food-grade PU sponge, food-grade silicone sponge or PE foam sponge. High-temperature activated carbon deodorizing particles are attached inside the sponge layer (12).