A composite packaging bag with automatic exhaust and moisture-proof dual functions
Patent Information
- Application Number
- CN202522034283.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-22
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-09-22
AI Technical Summary
[0004]存在以下问题：现有包装袋在包装对水汽和气体敏感的物品时，容易出现气体积聚导致膨胀、爆袋以及水汽进入影响产品质量，为此，我们提出一种具备自动排气与防潮双重功能的复合包装袋
[0014]与现有技术相比，本实用新型的有益效果是：本具备自动排气与防潮双重功能的复合包装袋，具有以下好处：
Smart Images
Figure CN224830422U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging bag technology, specifically a composite packaging bag with both automatic ventilation and moisture-proof functions. Background Technology
[0002] Packaging bags are functional carriers used to contain, protect, transport, and display various items. They can protect the contents, facilitate circulation, and transmit information, and are widely used in many fields such as commerce, industry, medicine, and daily life.
[0003] When using existing packaging bags, the usual procedure is to open the bag, put the item inside, and then press the two strips at the bag opening (which typically consists of two interlocking strips, one with raised ridges or teeth and the other with corresponding grooves or slots) with your fingers to make the raised part fit into the groove part, thus achieving a sealing effect and completing the packaging of the item.
[0004] The following problems exist: when packaging items that are sensitive to moisture and gas, existing packaging bags are prone to gas accumulation, which can lead to expansion, bag bursting, and moisture ingress, affecting product quality. To address this, we propose a composite packaging bag with both automatic venting and moisture-proof functions. Utility Model Content
[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a composite packaging bag with automatic venting and moisture-proof functions. Through the setting of the venting mechanism, the gas inside the bag is automatically and slowly released to prevent expansion and bursting. It can also absorb moisture inside the bag in a short time, effectively reducing the risk of moisture absorption by the contents, extending the shelf life of the product, and improving the safety of storage and transportation. It can effectively solve the problems in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a composite packaging bag with dual functions of automatic venting and moisture prevention, comprising a packaging bag and a venting mechanism;
[0007] The exhaust mechanism includes an exhaust block, an air inlet, an exhaust port, a cavity, an exhaust layer, unidirectional micropores, a dustproof protective layer, and a moisture-absorbing layer. An exhaust block is installed in the mounting hole on the front side of the packaging bag. The exhaust block has evenly distributed exhaust ports and air inlets on its front and rear sides. A cavity is formed inside the exhaust block, and the exhaust ports and air inlets are connected to the cavity. Inside the cavity, from front to back, a dustproof protective layer, an exhaust layer, and a moisture-absorbing layer are distributed sequentially. Uniformly distributed unidirectional micropores are formed on the front side of the exhaust layer. Through the exhaust mechanism, gas inside the bag is automatically and slowly released, preventing expansion and bag bursting. It can also absorb moisture inside the bag in a short time, effectively reducing the risk of moisture absorption by the contents, extending the product's shelf life, and improving storage and transportation safety.
[0008] Furthermore, the unidirectional micropores include an air inlet section, a flow guide section, and an exhaust section. The rear side of the exhaust layer has uniformly distributed air inlet sections, and the front side of the exhaust layer has exhaust sections that correspond one-to-one with the air inlet sections. The air inlet sections and the corresponding exhaust sections are connected by flow guide sections, which are all truncated cones that are narrower at the back and wider at the front. The air inlet section and the exhaust section are cylindrical with one smaller diameter and one larger diameter, which facilitates unidirectional air permeability.
[0009] Furthermore, the dustproof protective layer includes a non-woven fabric and a microporous membrane. The dustproof protective layer is composed of a non-woven fabric and a microporous membrane. The non-woven fabric is located on the back side of the microporous membrane. The back side of the non-woven fabric contacts the front side of the exhaust layer. The front side of the microporous membrane contacts the front wall of the cavity, which facilitates air permeability and dust prevention.
[0010] Furthermore, the moisture-absorbing layer is a core-sheath type composite fiber layer, which includes a sheath layer and a core layer. The core layer is completely wrapped by the sheath layer, forming a cross-sectional shape similar to concentric circles. The front side of the moisture-absorbing layer contacts the rear side of the exhaust layer, and the front side of the moisture-absorbing layer contacts the rear wall of the cavity, which facilitates air permeability and moisture absorption.
[0011] Furthermore, the packaging bag has an easy-tear line at the material dispensing port on the front side, an easy-tear ear at the left end of the front side of the easy-tear line, and evenly distributed indicator grooves on the front side of the easy-tear line to facilitate the first opening of the packaging bag.
[0012] Furthermore, the packaging bag is provided with positioning seats on both the front and back walls. The front side of the rear positioning seat is provided with evenly distributed protruding teeth, and the rear side of the front positioning seat is provided with evenly distributed grooves. The protruding teeth are engaged with the interior of the corresponding grooves. The front side of the packaging bag is provided with a reminder strip corresponding to the positioning seat. The reminder strip is located below the tear line, which facilitates the control of opening and closing of the packaging bag.
[0013] Furthermore, the packaging bag has hanging openings on both the left and right sides of the upper front side for easy placement of the packaging bag.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This composite packaging bag with automatic ventilation and moisture-proof functions has the following advantages:
[0015] During storage, the packaging bag, due to the presence of the flow guide section (a frustum-shaped section that is narrower at the back and wider at the front) and the air inlet and exhaust sections (cylinders with different diameters), experiences less flow resistance when gas enters from the narrow end (air inlet section). Conversely, when gas attempts to enter from the wide end, the gas flows unidirectionally from the rear of the exhaust layer through one-way micropores to the front of the exhaust block. This ensures that gas can only enter through the air inlet on the exhaust block and exit through the exhaust outlet, allowing gas inside the packaging bag to slowly escape while preventing external gas from entering. This creates a one-way ventilation effect, automatically and slowly releasing gas from the bag to prevent expansion and bursting. Furthermore, the moisture-absorbing layer composed of the sheath and core layers can absorb moisture from inside the bag in a short time, effectively reducing the risk of moisture absorption by the contents, extending product shelf life, and improving storage and transportation safety. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0018] Figure 3 This is an enlarged structural schematic diagram of point A of this utility model;
[0019] Figure 4 This is a schematic diagram of the exhaust mechanism of this utility model;
[0020] Figure 5 This is a cross-sectional view of the exhaust mechanism of this utility model;
[0021] Figure 6 This is an enlarged structural schematic diagram of section B of this utility model;
[0022] Figure 7 This is a cross-sectional structural schematic diagram of the unidirectional micropore of this utility model.
[0023] In the diagram: 1 Packaging bag, 2 Easy-tear line, 3 Exhaust mechanism, 31 Exhaust block, 32 Air inlet, 33 Exhaust hole, 34 Cavity, 35 Exhaust layer, 36 One-way micropore, 361 Air inlet section, 362 Guide section, 363 Exhaust section, 37 Dustproof protective layer, 371 Non-woven fabric, 372 Microporous membrane, 38 Moisture-absorbing layer, 381 Sheath layer, 382 Core layer, 4 Easy-tear ear, 5 Indicator groove, 6 Positioning seat, 7 Raised tooth, 8 Groove, 9 Indicator strip, 10 Hanging opening. Detailed Implementation
[0024] 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Please see Figure 1-7 This embodiment provides a technical solution: a composite packaging bag with dual functions of automatic venting and moisture prevention, including a packaging bag 1 and a venting mechanism 3. The front side of the packaging bag 1 has an easy-tear line 2 at the material inlet, and an easy-tear ear 4 at the left end of the front side of the easy-tear line 2. (Both the easy-tear line 2 and the easy-tear ear 4 are made of the same material as the packaging bag 1. The packaging bag 1 is a composite packaging bag, and the material can be a multi-layer composite film (outer layer polyester PET, middle layer aluminum foil AL, inner layer polyethylene PE laminated together). The easy-tear line 2 is a... During processing, a laser is used to cut extremely fine, non-penetrating, continuous double-row cuts on the surface of the packaging bag 1. The easy-tear line 2 breaks along the cut path when torn. The easy-tear ear 4 is a small ear-shaped structure with the end of the easy-tear line 2 protruding outwards. When opening the packaging bag 1 for the first time, the easy-tear ear 4 can be pinched directly to apply force without having to look for a gap or worry about slipping. The front side of the easy-tear line 2 has evenly distributed indicator grooves 5. Both the front and back walls of the packaging bag 1 are provided with positioning seats 6. The front side of the rear positioning seat 6 has evenly distributed protruding teeth 7. The rear side of the front positioning seat 6 has evenly distributed grooves 8 (the positioning seat 6, protrusions 7, and grooves 8 can all be made of polyethylene). The protrusions 7 are all engaged inside the corresponding grooves 8. The front side of the packaging bag 1 has a reminder strip 9 corresponding to the positioning seat 6, located below the easy-tear line 2. Hanging openings 10 are located on both the left and right sides of the upper front side of the packaging bag 1. The packaging bag 1, along with its contents, can be hung on a hook for display through the hanging openings 10. When the packaging bag 1 is opened for the first time... Observe the indicator groove 5 on the easy-tear line 2, then hold the easy-tear ear 4 and pull it along the direction of the indicator groove 5. The easy-tear ear 4 drives the easy-tear line 2 to move, thereby opening the material opening of the packaging bag 1. Then, hold the front and back sides of the packaging bag 1 with both hands and pull it outward. Under the action of the pulling force, the protrusion 7 on the positioning seat 6 leaves the groove 8, thereby opening the packaging bag 1. After the item is taken out, press the position of the indicator strip 9 on the outside of the packaging bag 1, causing the protrusion 7 to re-embed into the groove 8 and close the packaging bag 1.
[0026] Exhaust mechanism 3 includes an exhaust block 31, an air inlet 32, an exhaust port 33, a cavity 34, an exhaust layer 35, unidirectional micropores 36, a dustproof protective layer 37, and a moisture-absorbing layer 38. An exhaust block 31 is installed in the mounting hole on the front side of the packaging bag 1. The exhaust block 31 has evenly distributed exhaust ports 33 and air inlets 32 on its front and rear sides, respectively. A cavity 34 is formed inside the exhaust block 31, and both the exhaust ports 33 and air inlets 32 are connected to the cavity 34. The cavity 34 contains, from front to back, a dustproof protective layer 37, an exhaust layer 35, and a moisture-absorbing layer 38. The front side of the exhaust layer 35 has evenly distributed unidirectional micropores 36, which include an air inlet section 361, a guide section 362, and a... The exhaust section 363 and the exhaust layer 35 have evenly distributed intake sections 361 on their rear side and exhaust sections 363 on their front side, each corresponding to an intake section 361. The intake sections 361 and their corresponding exhaust sections 363 are connected by guide sections 362, which are all frustum-shaped (narrower at the rear and wider at the front). The intake sections 361 and exhaust sections 363 are cylindrical with one smaller diameter than the other. The dustproof protective layer 37 includes a non-woven fabric 371 and a microporous membrane 372. The dustproof protective layer 37 is composed of a composite of the non-woven fabric 371 and the microporous membrane 372 (both materials of the non-woven fabric 371 and the microporous membrane 372 can be polypropylene (PP)). The non-woven fabric 371 is located on the microporous membrane 372. The rear side of the nonwoven fabric 371 contacts the front side of the exhaust layer 35, and the front side of the microporous membrane 372 contacts the front wall of the cavity 34. The moisture-absorbing layer 38 is a core-sheath type composite fiber layer, which includes a sheath layer 381 and a core layer 382 (the material of the sheath layer 381 can be nylon, and the core layer 382 is a water-absorbing polymer (can be a polyacrylic acid copolymer)). The core layer 382 is completely wrapped by the sheath layer 381, forming a cross-sectional shape similar to concentric circles. The front side of the moisture-absorbing layer 38 contacts the rear side of the exhaust layer 35, and the front side of the moisture-absorbing layer 38 contacts the rear wall of the cavity 34. During the placement of the packaging bag 1, because the guide sections 362 are all in a frustum shape that is narrow at the back and wide at the front, the air intake section 3... Section 61 and exhaust section 363 are cylindrical sections with different diameters, one smaller and one larger. Therefore, when gas enters from the narrow end (inlet section 361), due to the smaller cross-sectional area at the narrow end, the gas has a higher flow velocity at the narrow end according to the principle of fluid continuity (when a fluid flows through an unbranched pipe, the flow rate through each cross-section is equal). As the gas flows towards the wide end (exhaust section 363), the cross-sectional area of the conical orifice gradually increases, the gas velocity decreases, the pressure is relatively stable, and the flow resistance is small, allowing the gas to pass through the guide section 362 and the matching inlet section 361 and exhaust section 363 relatively smoothly. When the gas attempts to enter the narrow end from the wide end, the situation is reversed; at the wide end, the gas velocity is lower and the pressure is relatively higher.As the gas flows towards the narrow end, the cross-sectional area gradually decreases, requiring acceleration. According to Bernoulli's equation, the pressure increases rapidly, generating significant resistance. This causes the gas to flow unidirectionally from the rear of the exhaust layer 35 through the one-way micropores 36 to the front of the exhaust block 31. Consequently, the gas can only enter through the air inlet 32 on the exhaust block 31 and exit through the exhaust 33, allowing the gas inside the packaging bag 1 to slowly escape while preventing external gas from entering, thus creating a one-way ventilation effect. Due to the presence of the sheath layer 381 and the core layer 382, moisture can enter and be absorbed through the gaps between the fibers of the sheath layer 381 and the polymer network channels of the core layer 382. Simultaneously, air can pass normally through the moisture-absorbing layer 38, providing excellent moisture absorption and breathability. Due to the presence of the nonwoven fabric 371 and the microporous membrane 372, the micropores on the microporous membrane 372 can block dust particles from passing through the air, and the nonwoven fabric 371 enhances the strength of the dustproof protective layer 37.
[0027] The working principle of the composite packaging bag with automatic ventilation and moisture-proof functions provided by this utility model is as follows: The packaging bag 1, along with the contents inside, can be hung on the hook for display through the hanging opening 10. When opening the packaging bag 1 for the first time, observe through the indicator groove 5 on the easy-tear line 2. Then, hold the easy-tear ear 4 and pull along the direction of the indicator groove 5. The easy-tear ear 4 drives the easy-tear line 2 to move, thereby opening the material opening of the packaging bag 1. Then, hold the front and back sides of the packaging bag 1 with both hands and pull outwards. Under the action of the pulling force, the protrusion 7 on the positioning seat 6 disengages from the groove 8, thereby opening the packaging bag 1. After the contents are taken out, press the position of the indicator strip 9 on the outside of the packaging bag 1, causing the protrusion 7 to re-embed into the groove 8, closing the packaging bag 1. The packaging bag 1 is then stored for a period of time. Since the guide sections 362 are all frustum-shaped with a narrower rear and a wider front, and the intake section 361 and exhaust section 363 are cylindrical with one smaller diameter and one larger diameter, when the gas enters from the narrow end (intake section 361), the gas has a higher velocity at the narrow end due to the smaller cross-sectional area. According to the principle of fluid continuity (when a fluid flows through an unbranched pipe, the flow rate through each cross-section is equal), as the gas flows towards the wide end (exhaust section 363), the cross-sectional area of the conical orifice gradually increases, the gas velocity decreases, the pressure is relatively stable, and the flow resistance is small. This allows the gas to pass through the guide sections 362 and the matching intake section 361 and exhaust section 363 relatively smoothly. When the gas attempts to enter the narrow end from the wide end, the situation is reversed. At the wide end, the gas velocity is lower and the pressure is relatively higher. As the gas flows towards the narrow end, the cross-sectional area gradually decreases, requiring acceleration. According to Bernoulli's equation, the pressure increases rapidly, generating significant resistance. This causes the gas to flow unidirectionally from the rear of the exhaust layer 35 through the one-way micropores 36 to the front of the exhaust block 31. Consequently, the gas can only enter through the air inlet 32 on the exhaust block 31 and exit through the exhaust 33, allowing the gas inside the packaging bag 1 to slowly escape while preventing external gas from entering, thus creating a one-way ventilation effect. Due to the presence of the sheath layer 381 and the core layer 382, moisture can enter and be absorbed through the gaps between the fibers of the sheath layer 381 and the polymer network channels of the core layer 382. Simultaneously, air can pass normally through the moisture-absorbing layer 38, providing excellent moisture absorption and breathability. Due to the presence of the nonwoven fabric 371 and the microporous membrane 372, the micropores on the microporous membrane 372 can block dust particles from passing through the air, and the nonwoven fabric 371 enhances the strength of the dustproof protective layer 37.
[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A composite packaging bag with dual functions of automatic ventilation and moisture protection, characterized in that: Includes packaging bag (1) and exhaust mechanism (3); Exhaust mechanism (3): It includes exhaust block (31), air inlet (32), exhaust hole (33), cavity (34), exhaust layer (35), one-way micropores (36), dustproof protective layer (37) and moisture-absorbing layer (38). The exhaust block (31) is provided in the mounting hole on the front side of the packaging bag (1). The exhaust block (31) has evenly distributed exhaust holes (33) and air inlet (32) on the front and rear sides respectively. The exhaust block (31) has a cavity (34) inside. The exhaust holes (33) and air inlet (32) are connected to the cavity (34). The cavity (34) has a dustproof protective layer (37), exhaust layer (35) and moisture-absorbing layer (38) distributed from front to back. The exhaust layer (35) has evenly distributed one-way micropores (36) on the front side.
2. The composite packaging bag with automatic ventilation and moisture-proof functions according to claim 1, characterized in that: The unidirectional micropore (36) includes an air inlet section (361), a flow guide section (362), and an exhaust section (363). The rear side of the exhaust layer (35) is provided with uniformly distributed air inlet sections (361), and the front side of the exhaust layer (35) is provided with exhaust sections (363) corresponding to the air inlet sections (361). The air inlet sections (361) and the corresponding exhaust sections (363) are connected by the flow guide section (362). The flow guide section (362) is a frustum shape that is narrow at the rear and wide at the front. The air inlet section (361) and the exhaust section (363) are cylindrical with one smaller diameter and one larger diameter.
3. The composite packaging bag with automatic ventilation and moisture-proof functions according to claim 1, characterized in that: The dustproof protective layer (37) includes a non-woven fabric (371) and a microporous membrane (372). The dustproof protective layer (37) is composed of a non-woven fabric (371) and a microporous membrane (372). The non-woven fabric (371) is located on the back side of the microporous membrane (372). The back side of the non-woven fabric (371) is in contact with the front side of the exhaust layer (35). The front side of the microporous membrane (372) is in contact with the front wall of the cavity (34).
4. A composite packaging bag with automatic ventilation and moisture-proof functions as described in claim 1, characterized in that: The moisture-absorbing layer (38) is a core-sheath type composite fiber layer, which includes a sheath layer (381) and a core layer (382). The core layer (382) is completely wrapped by the sheath layer (381), forming a cross-sectional shape similar to concentric circles. The front side of the moisture-absorbing layer (38) contacts the rear side of the exhaust layer (35), and the front side of the moisture-absorbing layer (38) contacts the rear wall of the cavity (34).
5. A composite packaging bag with automatic ventilation and moisture-proof functions as described in claim 1, characterized in that: The packaging bag (1) has an easy-tear line (2) at the material inlet on the front side, an easy-tear ear (4) at the left end of the front side of the easy-tear line (2), and evenly distributed indicator grooves (5) on the front side of the easy-tear line (2).
6. A composite packaging bag with automatic ventilation and moisture-proof functions according to claim 5, characterized in that: The packaging bag (1) is provided with positioning seats (6) on both the front and back walls. The front side of the positioning seat (6) on the rear side is provided with evenly distributed protruding teeth (7), and the rear side of the positioning seat (6) on the front side is provided with evenly distributed grooves (8). The protruding teeth (7) are all engaged in the interior of the corresponding grooves (8). The front side of the packaging bag (1) is provided with a reminder strip (9) corresponding to the positioning seat (6). The reminder strip (9) is located below the tear line (2).
7. A composite packaging bag with automatic ventilation and moisture-proof functions as described in claim 1, characterized in that: The packaging bag (1) has hanging openings (10) on both the left and right sides of the upper front side.