A bag-in-bag structure food packaging bag
By using an adhesive layer and flexible baffles in the food packaging bag, the problem of sub-bags falling off and tearing during transportation is solved, thus improving stability and convenience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING LEYUAN COMPOSITE PACKAGING PROD CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-07-21
AI Technical Summary
In existing food packaging bags, the inner bags are prone to falling off during transportation or scattering when torn, resulting in poor stability and affecting food safety and convenience.
An adhesive layer is used to securely connect the liquid sub-bags and active preservation sub-bags to the outer packaging bag. The design of soft baffles and soft steel wires ensures that the sub-bags are not easily broken when torn and are easy to store.
This improves the stability of the packaging bags, prevents the sub-bags from falling off or tearing, enhances food safety and convenience, and reduces the space occupied by trash cans.
Smart Images
Figure CN224529494U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of food packaging bags, and in particular to a food packaging bag with a bag-in-bag structure. Background Technology
[0002] Food packaging bags are flexible containers specifically designed to hold, protect, preserve, and display food. They are typically made of multi-layered composite materials and are crucial in the modern food industry, directly impacting food safety, shelf life, convenience, and consumer experience.
[0003] The inclusion of independent sub-bags inside food packaging bags, also known as small bags, inner bags, or functional bags, is a key design feature that achieves multi-functional integration through physical partitioning. Its core purpose is to address diverse needs that cannot be met simultaneously by a single type of packaging. For example, placing a desiccant sub-bag inside a food packaging bag aims to control the humidity inside the packaging and prevent the food from becoming damp and spoiling. This is one of the key measures to ensure food quality and safety.
[0004] Existing food packaging bags have inner sub-bags to distinguish food or functional products in different physical states or of different substances. However, these sub-bags are usually placed directly inside the outer packaging bag. Impacts or compression during transportation can cause the sub-bags to shake inside the outer packaging bag, leading to the risk of them falling off. At the same time, when the outer packaging bag is torn open, there is a risk that the sub-bags may scatter or be torn open at the same time, thus reducing the stability of the packaging bag. To address these issues, a bag-within-a-bag structure for food packaging bags is proposed. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a food packaging bag with a bag-in-bag structure, which aims to improve the problem that the existing bag-in-bag structure food packaging bags lack the ability to fix the sub-bags inside the outer packaging bag, and that the impact when tearing open the outer packaging bag is too great, causing the sub-bags to scatter or be torn open at the same time, resulting in the risk of food falling out.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a bag-in-bag structure food packaging bag, including an outer packaging bag, wherein the outer packaging bag contains a liquid sub-bag, a desiccant sub-bag, and an active preservative sub-bag, wherein the liquid sub-bag and the active preservative sub-bag are provided with adhesive layers, and are fixedly connected to the inner wall of the outer packaging bag through the adhesive layers.
[0007] As a further description of the above technical solution:
[0008] The outer packaging bag includes a high-toughness material layer, a barrier layer is fixedly connected to the outer wall of the high-toughness material layer, and a heat-sealing layer is fixedly connected to the outer wall of the barrier layer. The liquid sub-bag includes a super-lubricating PE inner layer, and a puncture-resistant PA intermediate layer is fixedly connected to the outer wall of the super-lubricating PE inner layer.
[0009] As a further description of the above technical solution:
[0010] The outer wall of the outer packaging bag has serrations, the outer wall of the liquid sub-bag has a tear opening, and the adhesive layer is fixedly connected to the outer wall of the heat-sealing layer on the side away from the liquid sub-bag.
[0011] As a further description of the above technical solution:
[0012] A flexible baffle is fixedly connected to the top of the liquid sub-bag, and the surface of the flexible baffle has rounded corners.
[0013] As a further description of the above technical solution:
[0014] The flexible baffle is located at the top of the tear opening.
[0015] As a further description of the above technical solution:
[0016] The flexible baffle is rectangular in shape.
[0017] As a further description of the above technical solution:
[0018] The inner wall of the flexible baffle is provided with an installation groove, and a flexible steel wire is fixedly connected to the inner wall of the installation groove.
[0019] As a further description of the above technical solution:
[0020] The mounting slot is arranged in a horizontally circular shape.
[0021] This utility model has the following beneficial effects:
[0022] In this invention, by providing an adhesive layer, a liquid sub-bag, an active preservative sub-bag, and a desiccant sub-bag, food in different physical states can be packaged separately in one bag, and the connection between the sub-bag and the outer packaging bag is tight, preventing them from falling off and causing the outer packaging bag to break. At the same time, by providing soft baffles and rounded corners, the sub-bags will not break due to the tearing force when the outer packaging bag is torn, thus improving the stability of the packaging bag in use.
[0023] 2. In this utility model, by combining the installation groove with the soft steel wire, the packaging bag can be rolled up and fixed when it is discarded, reducing the area of the packaging bag in the trash can. At the same time, it can be easily carried to the next disposal point when it is inconvenient to discard it outdoors. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the external structure of the main body of a bag-in-bag food packaging bag according to the present invention.
[0025] Figure 2This is a cross-sectional view of the outer packaging bag of a bag-in-bag structure proposed in this utility model;
[0026] Figure 3 This is a partial cross-sectional schematic diagram of the main structure of a bag-in-bag food packaging bag according to the present invention;
[0027] Figure 4 This is a bottom view of the structure of a bag-in-bag food packaging bag with the outer packaging bag removed, as proposed in this utility model.
[0028] Figure 5 This is a cross-sectional schematic diagram of the flexible retaining strip structure of a bag-in-bag food packaging bag according to the present invention.
[0029] Legend:
[0030] 1. Outer packaging bag; 101. High-toughness material layer; 102. Barrier layer; 103. Heat-sealing layer; 2. Serrated edge; 3. Adhesive layer; 4. Liquid sub-bag; 401. Super-lubricated PE inner layer; 402. Puncture-resistant PA intermediate layer; 5. Desiccant sub-bag; 6. Active preservation sub-bag; 7. Tear opening; 8. Flexible baffle strip; 9. Rounded corners; 10. Mounting groove; 11. Flexible steel wire. Detailed Implementation
[0031] 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.
[0032] Reference Figures 1-3This utility model provides an embodiment of a bag-in-bag food packaging bag, including an outer packaging bag 1. The outer packaging bag 1 includes a high-toughness material layer 101, which is the outermost layer and provides mechanical strength, puncture resistance, tear resistance, and abrasion resistance, protecting the packaging bag from damage during transportation and stacking. It also serves as a printing surface, capable of printing patterns, text, and barcodes. The high-toughness material layer 101 can be made of BOPP or PA material. A barrier layer 102 is fixedly connected to the outer wall of the high-toughness material layer 101. The barrier layer 102 blocks the intrusion of external oxygen, water vapor, light, and odors, while preventing the escape of internal food aromas, oils, or volatile components, thus extending shelf life. The barrier layer 102 can be made of EVOH or aluminum foil. A heat-sealing layer 103 is fixedly connected to the outer wall of the barrier layer 102, providing good heat-sealing performance to ensure the packaging bag can be reliably sealed by heating and pressurization, preventing leakage. The sealing layer 103 can be made of PE or CPP material, which is a food contact safe material with stable chemical properties and no risk of migration. The outer packaging bag 1 contains a liquid sub-bag 4, which includes a super-lubricated PE inner layer 401. The outer wall of the super-lubricated PE inner layer 401 is fixedly connected to a puncture-resistant PA intermediate layer 402. The outer packaging bag 1 contains a desiccant sub-bag 5, which can be made of breathable non-woven fabric or microporous membrane material and contains desiccant granules. The outer packaging bag 1 also contains an active preservation sub-bag 6, which contains a breathable composite material containing deoxidizer or ethylene adsorbent. The outer wall of the liquid sub-bag 4 is fixedly connected to an adhesive layer 3. The side of the adhesive layer 3 away from the liquid sub-bag 4 is fixedly connected to the outer wall of the heat-sealing layer 103. The adhesive layer 3 and the heat-sealing layer 103 are glued together. The outer wall of the active preservation sub-bag 6 is also provided with an adhesive layer 3, which can fix it inside the outer packaging bag 1 and keep it in a fixed position inside the bag.
[0033] Reference Figures 3-5 The outer packaging bag 1 has serrations 2 on its outer wall, which makes it easy to tear open the outer packaging bag 1 to take out the inner sub-bag. The outer wall of the liquid sub-bag 4 has a tear opening 7. The surface of the active preservation sub-bag 6 also has a tear opening 7, which makes it easy to tear open the sub-bag. A flexible baffle 8 is fixedly connected to the top of the liquid sub-bag 4. The flexible baffle 8 is made of silicone material and there are two sets of flexible baffle 8, which are located on the top of the liquid sub-bag 4 and the active preservation sub-bag 6 respectively. The flexible baffle 8 is located on the top of the tear opening 7. The flexible baffle 8 is rectangular in shape and has rounded corners 9 on its surface. The rounded corners 9 provide a transition when the outer packaging bag 1 is torn and comes into contact with the flexible baffle 8, so that the outer packaging bag 1 can naturally slide through the flexible baffle 8.
[0034] Reference Figure 5The inner wall of the flexible baffle 8 is provided with an installation groove 10. The installation groove 10 is horizontally circular and has a semi-circular cross-section. The diameter of the installation groove 10 is larger than the diameter of the flexible steel wire 11, which can accommodate the installation of the flexible steel wire 11. The flexible steel wire 11 is fixedly connected to the inner wall of the installation groove 10. The flexible steel wire 11 can be bent at will to bind the outer packaging bag 1 and the sub-bag.
[0035] Working principle: The outer packaging bag 1 is torn open by the saw teeth 2. Since the liquid sub-bag 4 and the active preservation sub-bag 6 are fixed inside the outer packaging bag 1, the tearing force causes the outer packaging bag 1 to pass through the rounded corners 9 on the flexible baffle 8, preventing the liquid sub-bag 4 and the active preservation sub-bag 6 from being torn open at the same time. When taking out the liquid sub-bag 4 and the active preservation sub-bag 6, force is applied to separate the adhesive layer 3 from the outer packaging bag 1. When taking out the liquid or the fixed food, align the tear opening 7 and tear it open. One end of the flexible baffle 8 gradually separates from the sub-bag. Take out the liquid or fixed food from the liquid sub-bag 4 and the active preservation sub-bag 6 for consumption. When discarding the packaging bag, wrap the outer packaging bag 1 around the sub-bag. The flexible baffle 8 is wrapped into a roll of packaging bag. The fixing force of the flexible steel wire 11 is used to wrap it, which can reduce the overall area of the packaging bag, so that it will not take up a large area when thrown into the trash can. At the same time, when it is inconvenient to discard, the reduced area makes it easier to carry to the disposal point.
Claims
1. A bag-in-bag structure food packaging bag, comprising an outer packaging bag (1), characterized in that: The outer packaging bag (1) is provided with a liquid sub-bag (4), a desiccant sub-bag (5), and an active preservation sub-bag (6). The liquid sub-bag (4) and the active preservation sub-bag (6) are provided with an adhesive layer (3), and are fixedly connected to the inner wall of the outer packaging bag (1) through the adhesive layer (3).
2. The food packaging bag with a bag-in-bag structure according to claim 1, characterized in that: The outer packaging bag (1) includes a high-toughness material layer (101), and a barrier layer (102) is fixedly connected to the outer wall of the high-toughness material layer (101). A heat-sealing layer (103) is fixedly connected to the outer wall of the barrier layer (102). The liquid sub-bag (4) includes a super-lubricating PE inner layer (401), and a puncture-resistant PA intermediate layer (402) is fixedly connected to the outer wall of the super-lubricating PE inner layer (401).
3. A food packaging bag with a bag-in-bag structure according to claim 1, characterized in that: The outer wall of the outer packaging bag (1) is provided with serrations (2), the outer wall of the liquid sub-bag (4) is provided with a tear opening (7), and the side of the adhesive layer (3) away from the liquid sub-bag (4) is fixedly connected to the outer wall of the heat-sealing layer (103).
4. A food packaging bag with a bag-in-bag structure according to claim 1, characterized in that: A flexible baffle (8) is fixedly connected to the top of the liquid sub-bag (4), and the surface of the flexible baffle (8) is provided with rounded corners (9).
5. A food packaging bag with a bag-in-bag structure according to claim 4, characterized in that: The flexible baffle (8) is located at the top of the tear opening (7).
6. A food packaging bag with a bag-in-bag structure according to claim 4, characterized in that: The flexible baffle (8) is rectangular in shape.
7. A food packaging bag with a bag-in-bag structure according to claim 4, characterized in that: The inner wall of the flexible baffle (8) is provided with an installation groove (10), and a flexible steel wire (11) is fixedly connected to the inner wall of the installation groove (10).
8. A food packaging bag with a bag-in-bag structure according to claim 7, characterized in that: The mounting slot (10) is arranged in a horizontally circular shape.