Heat-resistant packaging bag made of PP (polypropylene) material
By introducing sealing strips, clamps, and limiting blocks into the heat-resistant PP packaging bag, the problem of damaged sealing performance after the packaging bag is opened is solved, enhancing sealing and heat insulation. It is suitable for high-temperature sterilization and storage and transportation, and is convenient to use and store.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN HETAI PACKAGING PROD CO LTD
- Filing Date
- 2025-05-09
- Publication Date
- 2026-04-17
AI Technical Summary
Existing heat-resistant PP packaging bags can only be opened by roughly tearing the seal open, which damages the sealing performance, makes it difficult to effectively preserve the remaining food, and affects the freshness and safety of the food.
A heat-resistant PP packaging bag with a sealing strip, clamp, limit block and handle was designed. The opening and closing of the sealing strip is controlled by the sliding clamp, the cavity structure enhances the heat insulation performance, and the creases make it easy to fold and store.
It achieves improved sealing reliability and heat insulation performance, ensuring food freshness, and is easy to open and close, convenient to fold and store, and suitable for high-temperature sterilization and storage.
Smart Images
Figure CN224131734U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging bag technology, and in particular to a heat-resistant PP material packaging bag. Background Technology
[0002] Heat-resistant PP packaging bags are packaging products made primarily of polypropylene (PP). They possess excellent heat resistance, high mechanical strength, strong chemical stability, are hygienic and non-toxic, and have high transparency. Common types include CPP cast film, BOPP biaxially oriented film, and PP composite packaging bags. They are widely used in food, pharmaceutical, and industrial fields, such as snack bags, tea bags, and milk powder bags. They can withstand high-temperature sterilization and are used to package foods that require high-temperature sterilization. They can also protect the contents during storage and transportation.
[0003] In existing technologies, some food packaging bags can only be opened by roughly tearing open the seal. Although this method is simple and direct, it has great drawbacks. Once torn open, the packaging bag is severely damaged and no longer has good sealing performance. When the food is not consumed at once, it is difficult to properly preserve the remaining food, making it very easy for the food to become damp and spoil. This not only causes waste but may also affect the health of consumers. Therefore, in order to solve the above problems, a heat-resistant PP material packaging bag is proposed. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides a heat-resistant PP material packaging bag, which aims to improve the problem in the prior art where the seal can only be roughly torn open, resulting in serious damage to the packaging bag and loss of good sealing performance.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A heat-resistant PP packaging bag includes a bag body made of heat-resistant PP material. The bag body has an internal cavity. Two sealing strips are fixedly connected to the top of the bag body. Clamping blocks are slidably connected to the outside of the two sealing strips. A limiting block is fixedly connected to the right side of the sealing strips. Limiting components are provided on both the front and rear sides of the bag body. Each limiting component includes multiple blocking blocks, the outside of which is fixedly connected to the outside of the handle. Creases are provided on both the left and right sides of the bag body.
[0007] As a further description of the above technical solution:
[0008] Two fixing plates are fixedly connected to the front and rear sides of the bag body. The fixing plates have movable grooves inside, and handles are slidably connected to the inner walls of the two movable grooves.
[0009] As a further description of the above technical solution:
[0010] The sealing strip is a butyl rubber sealing strip, and the clamping block is a polypropylene clamping block;
[0011] As a further description of the above technical solution:
[0012] The outside of the clamping block is in contact with the outside of the limiting block, and the outside of the blocking block is in contact with the outside of the fixing plate;
[0013] As a further description of the above technical solution:
[0014] The handle is a polyethylene handle, and the block is a polyvinyl chloride block;
[0015] As a further description of the above technical solution:
[0016] The size of the movable groove is larger than the diameter of the handle, and the bag body is transparent.
[0017] This utility model has the following beneficial effects:
[0018] 1. In this utility model, the two sealing strips at the top of the bag fit tightly together, forming a reliable sealing barrier that can effectively block outside air, moisture and dust, ensuring the freshness and quality of food. The clamping block slides along the sealing strip track, which can easily open and close the sealing strip. The limiting block prevents the clamping block from slipping, ensuring the reliability of the sealing operation. In terms of heat insulation, the cavity inside the bag plays an important role. Since air is a poor conductor of heat, it can effectively slow down the rate at which heat is conducted to the food inside the bag when the outside temperature changes, thus enhancing the overall heat insulation performance of the packaging bag. Whether it is hot food or cold drinks, it can maintain a suitable temperature.
[0019] 2. In this utility model, the fixed plates on the front and rear sides of the bag support and fix the handles. The user pulls the handle from the middle of the fixed plate, and the handle can bend under the guidance of the movable groove, making it easy to lift the bag. The stopper on the handle cooperates with the fixed plate to limit the range of movement of the handle and ensure safe and stable use. Regarding storage, the creases on the left and right sides of the bag are made using a special pressing process. After the bag is used, the user can easily fold the bag along the creases, greatly reducing its volume and making it easy to store in small spaces. This also facilitates subsequent recycling, reflecting a dual consideration of environmental protection and practicality. Attached Figure Description
[0020] Figure 1 This is a three-dimensional schematic diagram of a heat-resistant PP packaging bag proposed in this utility model;
[0021] Figure 2 This is a schematic diagram of the structure of a heat-resistant PP packaging bag body proposed in this utility model;
[0022] Figure 3 This is a schematic diagram of the structure of a heat-resistant PP material packaging bag sealing strip proposed in this utility model;
[0023] Figure 4 for Figure 3 Enlarged view of point A in the middle.
[0024] Legend:
[0025] 1. Bag body; 2. Cavity; 3. Sealing strip; 4. Clamping block; 5. Fixing plate; 6. Movable groove; 7. Handle; 8. Block; 9. Crease; 10. Limiting block. Detailed Implementation
[0026] 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.
[0027] Reference Figures 1 to 3 One embodiment of this utility model is a heat-resistant PP packaging bag, including a bag body 1, which is the main body of the entire packaging bag. The bag body 1 is transparent and made of heat-resistant PP material. Heat-resistant PP material has excellent heat resistance and can withstand high temperature environments within a certain range, effectively preventing deformation and melting under high temperature conditions, and ensuring that the packaging bag can maintain a stable physical form in various usage scenarios.
[0028] The bag body 1 has an internal cavity 2. Air is a poor conductor of heat, which greatly hinders heat transfer. When the ambient temperature is high or low, the cavity 2 effectively slows down the rate at which heat is conducted to the food inside the bag, thereby enhancing the overall insulation performance of the packaging bag. Two sealing strips 3 are fixedly connected to the top of the bag body 1. The sealing strips 3 are made of butyl rubber. Butyl rubber has a certain degree of flexibility, which can adapt to the folding and deformation of the packaging bag. When the packaging bag is sealed, the two sealing strips 3 fit tightly together, forming a reliable sealing barrier that effectively prevents external air, moisture, and dust from entering the bag, thus ensuring the freshness and quality of the food.
[0029] Two sealing strips 3 are externally connected by clamping blocks 4, which are made of polypropylene. Polypropylene is relatively rigid and not easily deformed. Clamping blocks 4 are the operating components that control the opening and closing of the sealing strips 3. When the user needs to open the packaging bag, simply slide clamping blocks 4 to the right. Clamping blocks 4 will move smoothly along the track of the sealing strips 3, gradually separating the originally tightly fitted sealing strips 3, thereby opening the top of the bag 1. When closing the packaging bag, sliding clamping blocks 4 to the left will squeeze and close the sealing strips 3 again, restoring the packaging bag to a sealed state. The sliding process of clamping blocks 4 is smooth and stable, providing users with a convenient and efficient operating experience.
[0030] A limiting block 10 is fixedly connected to the outer right side of the sealing strip 3. The outer side of the clamping block 4 contacts the outer side of the limiting block 10. The main function of the limiting block 10 is to prevent the clamping block 4 from moving excessively and slipping off during sliding. When the user slides the clamping block 4 to the right to open the packaging bag, as the clamping block 4 moves, it will be blocked by the limiting block 10 and stop moving when it comes into contact with the limiting block 10. This ensures that the clamping block 4 always slides within a controllable range, avoiding damage to the sealing strip 3 or its inability to function properly due to the clamping block 4 slipping off, and ensuring the reliability and stability of the opening and closing operation of the packaging bag.
[0031] Reference Figures 3 to 4 Two fixing plates 5 are fixedly connected to both the front and rear sides of the bag body 1. The fixing plates 5 have movable grooves 6 inside, and handles 7 are slidably connected to the inner walls of the two movable grooves 6. The handles 7 are made of polyethylene, which has good flexibility, low-temperature resistance, and chemical stability; it is non-toxic, odorless, and relatively inexpensive. The fixing plates 5 play a crucial role in supporting and fixing the handles 7, possessing sufficient strength and stability to withstand the pulling force applied by the handles 7 during lifting.
[0032] The movable groove 6 is the channel for the handle 7 to slide. The size of the movable groove (6) is larger than the diameter of the handle (7). When the user pulls the handle 7 between the two fixed plates 5, the handle 7 can bend smoothly under the guidance of the movable groove 6, so that the user can easily lift the bag 1. The existence of the movable groove 6 provides a guarantee for the flexible use of the handle 7 and improves the practicality of the packaging bag. Limiting components are provided on the front and rear sides of the bag 1. The limiting components include multiple blocks 8. The outside of the blocks 8 is fixedly connected to the outside of the handle 7. The blocks 8 are made of polyvinyl chloride. The handle 7 is the key to the user's convenience in carrying the packaging bag. The outside of the blocks 8 is in contact with the outside of the fixed plates 5. The function of the movable groove 6 is to limit the range of movement of the handle 7 in the movable groove 6 and prevent the handle 7 from being overstretched or falling out of the movable groove 6. Creases 9 are provided on the left and right sides of the bag 1. The creases 9 are designed to facilitate the storage and recycling of the packaging bag after use.
[0033] Working principle: First, place the bag body 1 in a suitable position. The air in the cavity 2 acts as an insulation layer, which can enhance the heat insulation performance of the packaging bag. The cavity 2 can also act as a buffer, reducing the impact and squeezing of the food inside the bag from the outside, and reducing the risk of food damage due to collision. The user can slide the clamp 4 to the right to separate the sealing strip 3, thereby opening the top of the bag body 1. When the clamp 4 contacts the outside of the limiting block 10, the clamp 4 will stop moving, which can prevent the clamp 4 from slipping off. If there is still something left inside after taking out the items, simply slide the clamp 4 to the left, and the clamp 4 can close the sealing strip 3 again, thereby resealing the bag body 1. Then, pull the handle 7 from between the two fixed plates 5. At this time, the handle 7 slides on the inner wall of the movable groove 6, which can bend the handle 7 and then lift the bag body 1, making it more convenient for the user to use. After the bag is empty, the bag body 1 can also be folded along the crease 9 for easy storage and recycling.
[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A heat-resistant PP material packaging bag, comprising a bag body (1), the material of the bag body (1) is a PP material bag body, characterized in that: The bag body (1) has an internal cavity (2), and two sealing strips (3) are fixedly connected to the top of the bag body (1). A clamping block (4) is slidably connected to the outside of the two sealing strips (3). A limiting block (10) is fixedly connected to the right side of the outside of the sealing strips (3). Limiting components are provided on both the front and rear sides of the bag body (1). The limiting component includes multiple blocking blocks (8), the blocking blocks (8) are fixedly connected to the outside of the handle (7), and creases (9) are provided on both the left and right sides of the bag body (1).
2. The heat-resistant PP material packaging bag according to claim 1, characterized in that: Two fixing plates (5) are fixedly connected to the front and rear sides of the bag body (1). The fixing plates (5) have movable grooves (6) inside, and handles (7) are slidably connected to the inner walls of the two movable grooves (6).
3. The heat-resistant PP material packaging bag according to claim 2, characterized in that: The sealing strip (3) is a butyl rubber sealing strip, and the clamping block (4) is a polypropylene clamping block.
4. The heat-resistant PP packaging bag according to claim 3, characterized in that: The outside of the clamping block (4) is in contact with the outside of the limiting block (10), and the outside of the blocking block (8) is in contact with the outside of the fixing plate (5).
5. The heat-resistant PP material packaging bag according to claim 2, characterized in that: The handle (7) is a polyethylene handle, and the block (8) is a polyvinyl chloride block.
6. The heat-resistant PP material packaging bag according to claim 2, characterized in that: The size of the movable groove (6) is larger than the diameter of the handle (7), and the bag body (1) is transparent.