Plastic flexible packaging bag

Abstract

The utility model discloses a plastic flexible packaging bag which comprises a flexible packaging bag body, a zipper, a pulling piece, an easy-to-tear film and a one-way exhaust valve. The zipper is transversely arranged in the top area of the flexible packaging bag body, the zipper pull is used for opening or closing the zipper, and a gap used for fixing the zipper pull is formed between the easy-to-tear film and the flexible packaging bag body. The one-way exhaust valve is arranged on the flexible packaging bag body and comprises a valve body, a breathable cover and a membrane, and the membrane is used for being bent towards one side of the breathable cover when bearing pressure in the flexible packaging bag, so that a channel used for exhausting gas is formed between the membrane and the breathable cover. Due to the arrangement of the zipper, a user can easily open and close the flexible packaging bag body, and the requirement that products need to be taken for multiple times is met; a gap formed between the easy-to-tear film and the flexible packaging bag body can be used for fixing the pull tab, so that the pull tab is ensured not to randomly shake or fall off when not in use; the one-way exhaust valve can exhaust gas in the flexible packaging bag body to prevent the gas in the bag body from expanding to affect the product quality.

Description

Technical Field

[0001] This utility model relates to the field of packaging bags, and more particularly to a plastic flexible packaging bag. Background Technology

[0002] In the field of modern packaging technology, plastic flexible packaging bags are widely used in the packaging of food, medicine, cosmetics and other consumer goods due to their advantages such as light weight, high durability and low cost. However, as consumers' requirements for product quality and ease of use continue to increase, traditional plastic flexible packaging bags are difficult to meet users' personalized needs in actual use.

[0003] First, most traditional plastic flexible packaging bags use a one-time sealing design, which makes it difficult for users to quickly reseal the packaging after opening, affecting the preservation of the items and the convenience of repeated use. Second, although flexible packaging bags are vacuum-sealed when sealing products, some products release gas during storage. This gas accumulates inside the packaging bag, which can easily cause the bag to expand or even break. Furthermore, for some gas-sensitive products, such as coffee beans, tea, and dried fruits, the gas inside the packaging bag can also affect their aroma and taste, and even cause oxidation or spoilage.

[0004] Therefore, existing technologies have shortcomings and need to be improved. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a plastic flexible packaging bag that is easy to open or close quickly and can release gas inside the bag.

[0006] To achieve this objective, the present invention adopts the following technical solution: a plastic flexible packaging bag, comprising a flexible packaging bag body, a zipper, a pull tab, an easy-tear film, and a one-way exhaust valve;

[0007] The zipper is horizontally disposed on the top area of ​​the flexible packaging bag. The pull tab is connected to the zipper and is used to open or close the zipper. The easy-tear film is disposed on the flexible packaging bag at the side end of the zipper, and a gap is formed between the easy-tear film and the flexible packaging bag to fix the pull tab.

[0008] The one-way exhaust valve is disposed on the flexible packaging bag body. The one-way exhaust valve is used to exhaust gas inside the flexible packaging bag body. The one-way exhaust valve includes a valve body, a vent cover and a diaphragm. The valve body is heat-sealed to the flexible packaging bag body. The vent cover is snap-fitted to the valve body. A receiving chamber is formed between the vent cover and the valve body. The diaphragm is located inside the receiving chamber.

[0009] The valve body has a first vent hole at the bottom, and the vent cover has several second vent holes along the circumferential direction. The bottom of the vent cover has a lower top block that abuts against the diaphragm. The diaphragm is used to bend toward the vent cover when subjected to pressure inside the soft packaging bag, so that a channel for gas to be discharged is formed between the diaphragm and the vent cover.

[0010] In the above technical solution, the valve body of the plastic flexible packaging bag is provided with an annular groove along the circumferential direction, and the bottom of the vent cover is provided with an annular locking block that engages with the annular groove.

[0011] Using the above-mentioned technical solutions, in the plastic flexible packaging bag, the bottom top block is located at the bottom side of the breathable cover.

[0012] Using the above-mentioned technical solutions, in the plastic flexible packaging bag, the bottom top block has a conical structure, and the cross-sectional area of ​​the bottom top block gradually decreases from top to bottom.

[0013] Using the above-mentioned technical solutions, the ratio of the length of the zipper to the width of the flexible packaging bag is 0.6-0.8.

[0014] In the above-mentioned technical solutions, the plastic flexible packaging bag also has a transparent area on the bag body for easy observation of the internal situation.

[0015] Using the above-mentioned technical solutions, the film in the plastic flexible packaging bag is made of silicone or polyurethane material.

[0016] Using the above-mentioned technical solutions, the flexible packaging bag body is made of polyethylene, polypropylene, or polyvinyl chloride.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] When the gas inside the flexible packaging bag accumulates, causing an increase in internal pressure, the membrane is pushed by the internal pressure and bends towards the vent cover, forming a channel for gas to escape. At this time, the gas inside the flexible packaging bag enters the valve body through the first vent, then passes through the channel between the membrane and the vent cover, and finally exits through the second vent on the vent cover. As the pressure inside the bag is released, the membrane gradually returns to its state of contact with the lower top block and closes the venting channel to prevent external air or impurities from entering the flexible packaging bag, thereby maintaining a stable internal environment. The zipper allows users to easily open and close the flexible packaging bag, meeting the needs of multiple product retrievals. The gap formed between the easy-tear film and the flexible packaging bag can be used to fix the pull tab, ensuring that the pull tab will not shake or fall off when not in use. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the easy-tear film of this utility model in the opened state;

[0023] Figure 3 This is a schematic diagram of the overall rear structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the one-way exhaust valve in its closed state according to this utility model;

[0025] Figure 5 This is a schematic diagram of the exhaust state structure of the one-way exhaust valve of this utility model. Detailed Implementation

[0026] To make the utility model's objectives, features, and advantages more apparent and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below 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 skilled in the art without creative effort are within the scope of protection of the present utility model.

[0027] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0028] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1 to 5 As shown, this utility model embodiment provides a plastic flexible packaging bag, including a flexible packaging bag body 10, a zipper 20, a pull tab 30, an easy-tear film 40, and a one-way exhaust valve 50;

[0030] The zipper 20 is horizontally positioned at the top of the flexible packaging bag 10. A pull tab 30 is connected to the zipper 20 and is used to open or close the zipper 20. An easy-tear film 40 is located on the side of the flexible packaging bag 10 of the zipper 20, and a gap is formed between the easy-tear film 40 and the flexible packaging bag 10 to secure the pull tab 30. The zipper 20 allows users to easily open and close the flexible packaging bag 10, meeting the needs of multiple product retrievals and providing greater flexibility and convenience. The gap between the easy-tear film 40 and the flexible packaging bag 10 secures the pull tab 30, ensuring it does not move or fall off when not in use, thus maintaining the integrity and aesthetics of the flexible packaging bag 10. Furthermore, the easy-tear film 40 makes opening the packaging bag easier and simpler initially; users only need to tear the film 40 to unlock the pull tab 30 and open the zipper 20, making it convenient to use.

[0031] like Figure 4 and Figure 5As shown, the one-way exhaust valve 50 is disposed on the flexible packaging bag 10. The one-way exhaust valve 50 is used to exhaust gas inside the flexible packaging bag 10. The one-way exhaust valve 50 includes a valve body 501, a vent cover 502, and a diaphragm 503. The valve body 501 is heat-sealed to the flexible packaging bag 10, and the vent cover 502 is snap-fitted to the valve body 501. A receiving chamber 500 is formed between the vent cover 502 and the valve body 501. The diaphragm 50... 3. Located within the accommodating chamber 500, the valve body 501 has a first exhaust port 5010 at its bottom, and the vent cover 502 has a plurality of second exhaust ports 5020 along its circumference. The vent cover 502 has a lower top block 5021 at its bottom that abuts against the diaphragm 503. The diaphragm 503 is used to bend toward the vent cover 502 when subjected to pressure from inside the soft packaging bag, so that a channel for gas discharge is formed between the diaphragm 503 and the vent cover 502. When the internal pressure of the flexible packaging bag 10 is low, the diaphragm 503 remains in close contact with the lower top block 5021. At this time, the one-way exhaust valve 50 is closed, preventing external air from entering the flexible packaging bag 10 and ensuring the airtightness of the flexible packaging bag 10. When gas accumulates inside the flexible packaging bag 10, causing the internal pressure to increase, the diaphragm 503 will be pushed by the internal pressure and bend towards the vent cover 502, forming a channel for gas to escape between it and the vent cover 502. At this time, the gas inside the flexible packaging bag 10 enters the valve body 501 through the first exhaust hole 5010, then passes through the channel between the diaphragm 503 and the vent cover 502, and finally exits from the second exhaust hole 5020 on the vent cover 502. As the pressure inside the bag is released, the diaphragm 503 will gradually return to the state of contact with the lower top block 5021 and close the exhaust channel to prevent external air or impurities from entering the flexible packaging bag 10 and maintain the stability of the internal environment.

[0032] like Figure 4 As shown, the valve body 501 is further provided with an annular groove 5011 along the circumferential direction, and the bottom of the vent cover 502 is provided with an annular locking block 5021 that engages with the annular groove 5011. This arrangement allows the vent cover 502 to be quickly installed onto the valve body 501, improving assembly efficiency.

[0033] like Figure 4 As shown, the lower top block 5021 is located at the bottom side of the vent cover 502. This arrangement makes it easier for the diaphragm 503 to bend under gas pressure, reducing bending resistance.

[0034] like Figure 4As shown, the lower top block 5021 has a conical structure, and its cross-sectional area gradually decreases from top to bottom. The conical structure of the lower top block 5021 can reduce the resistance of the diaphragm 503 during the bending process, so that the diaphragm 503 will not be subjected to excessive resistance force when bending, thereby making the bending process smoother.

[0035] like Figure 1 and Figure 2 As shown, the ratio of the length of the zipper 20 to the width of the flexible packaging bag 10 is 0.6-0.8. In this embodiment, the ratio of the length of the zipper 20 to the width of the flexible packaging bag 10 is 0.8. This setting ensures that the opening of the flexible packaging bag 10 is large enough to facilitate users to quickly take out or put in items.

[0036] like Figure 1 and Figure 2 As shown, the flexible packaging bag 10 is further provided with a transparent area 100 for easy observation of the internal situation.

[0037] Furthermore, the diaphragm 503 is made of silicone or polyurethane. In this embodiment, the diaphragm 503 is made of silicone, which has good elasticity and flexibility. It can bend and deform naturally when subjected to pressure and has a strong ability to recover its original shape. This allows the diaphragm 503 to bend quickly to open the exhaust channel when the internal pressure increases and to return to a sealed state after the pressure is released.

[0038] Furthermore, the flexible packaging bag 10 is made of polyethylene, polypropylene, or polyvinyl chloride. In this embodiment, the flexible packaging bag 10 is made of polyethylene. Polyethylene has good flexibility and can withstand a certain degree of compression and deformation without easily breaking, thus improving durability and more effectively protecting the internal product.

[0039] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A type of flexible plastic packaging bag, characterized in that, This includes the flexible packaging bag body, zipper, pull tab, easy-tear film, and one-way exhaust valve; The zipper is horizontally disposed on the top area of ​​the flexible packaging bag. The pull tab is connected to the zipper and is used to open or close the zipper. The easy-tear film is disposed on the flexible packaging bag at the side end of the zipper, and a gap is formed between the easy-tear film and the flexible packaging bag to fix the pull tab. The one-way exhaust valve is disposed on the flexible packaging bag body. The one-way exhaust valve is used to exhaust gas inside the flexible packaging bag body. The one-way exhaust valve includes a valve body, a vent cover and a diaphragm. The valve body is heat-sealed to the flexible packaging bag body. The vent cover is snap-fitted to the valve body. A receiving chamber is formed between the vent cover and the valve body. The diaphragm is located inside the receiving chamber. The valve body has a first vent hole at the bottom, and the vent cover has several second vent holes along the circumferential direction. The bottom of the vent cover has a lower top block that abuts against the diaphragm. The diaphragm is used to bend toward the vent cover when subjected to pressure inside the soft packaging bag, so that a channel for gas to be discharged is formed between the diaphragm and the vent cover.

2. The plastic flexible packaging bag according to claim 1, characterized in that, The valve body has an annular groove along the circumference, and the bottom of the vent cover has an annular locking block that engages with the annular groove.

3. The plastic flexible packaging bag according to claim 1, characterized in that, The lower top block is located at the bottom side of the vent cover.

4. The plastic flexible packaging bag according to claim 1, characterized in that, The lower top block has a conical structure, and the cross-sectional area of ​​the lower top block gradually decreases from top to bottom.

5. The plastic flexible packaging bag according to claim 1, characterized in that, The ratio of the length of the zipper to the width of the flexible packaging bag is 0.6-0.

8.

6. The plastic flexible packaging bag according to claim 1, characterized in that, The flexible packaging bag also has a transparent area for easy observation of the interior.

7. The plastic flexible packaging bag according to any one of claims 1-6, characterized in that, The diaphragm is made of silicone or polyurethane.

8. The plastic flexible packaging bag according to any one of claims 1-6, characterized in that, The flexible packaging bag is made of polyethylene, polypropylene, or polyvinyl chloride.

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