An inflatable airbag with a multi-layer membrane anti-leakage valve

Abstract

The present invention discloses an inflatable airbag with a multi-layer membrane type anti-leakage valve, which belongs to the technical field of inflatable airbags for packaging and transportation. The multi-layer membrane type anti-leakage valve includes two outer valve membranes and one or more inner valve membranes. The outer valve membrane and the inner valve membrane are pressed and overlapped together, and the one or more inner valve membranes are thermally located between the two outer valve membranes. In the airflow direction, the length of the inner valve membrane is less than the length of the outer valve membrane. A primary one-way valve type airflow channel is formed between the inner valve membrane and the outer valve membrane, or between the inner valve membranes, and a final one-way valve type airflow channel is formed between the two outer valve membranes. The airflow flows to the final one-way valve type airflow channel through the primary one-way valve type airflow channel. The present application forms a multi-stage one-way valve type airflow channel by adding an inner membrane layer between the membrane valves to improve the air-locking effect of the membrane valve, so as to solve the problem of air leakage from the membrane valve in the existing packaging inflatable airbag.

Description

Technical Field

[0001] The present invention relates to the technical field of inflatable airbags, and in particular to an inflatable airbag for packaging and transportation. Background Art

[0002] The inflatable airbag for packaging and transportation in the prior art, such as the utility model patent with publication number CN207497301U, comprises an upper film, a lower film and an air valve film, wherein the air valve film is a single-layer film and is located between the upper film and the lower film; a first heat sealing line is heat-sealed on the top of the air valve film; the first heat sealing line adheres the air valve film to the upper film and is perpendicular to the second heat sealing line, and the second heat sealing line is a straight line; an irregular air intake heat sealing pattern 7 is provided below the first heat sealing line, and the air intake heat sealing pattern partially adheres the air valve film to the lower film; a third heat sealing line is heat-pressed at the lower end of the air column bag, and the third heat sealing line forms an air storage column with the first heat sealing line and the second heat sealing line, and the air storage column is provided with at least one row of heat sealing points, and the air storage column can form a three-dimensional packaging bag through a series of bends at the heat sealing points. The single-layer air valve film air column bag without a heat-resistant ink layer is inflated by an automatic inflator, which can realize accurate inflation of each air column separately, and heat seal while inflating. After the inflation is completed, an inflation heat seal line is formed, which adheres the upper film, the lower film and the air valve film, further preventing gas leakage and achieving a better air-locking effect. The first heat seal line can adhere the air valve film to the lower film, and the corresponding air intake heat seal pattern partially adheres the air valve film to the upper film, which can also complete the automatic inflation and air-locking function of the air column. The inflation principle of the first embodiment is as follows: a single-layer air valve film air column bag without a heat-resistant ink layer is placed on the automatic inflator, the tops of the upper film and the lower film are separated, the inflation nozzle of the automatic inflator is inserted, and the inflation port on the inflation nozzle is aligned with the air inlet of the air storage column. The automatic inflator drives the pressure roller through a linkage device, and the pressure roller drives the air column bag to move forward at a uniform speed. When the air storage column passes through the inflation nozzle, the gas enters the position of the air inlet heat seal pattern from the position of the first heat seal line through the air valve film and the lower film. The air inlet heat seal pattern partially adheres the air valve film to the lower film, and the gas enters the air storage column from the pore channel that has not been adhered. As the inflation amount is saturated, due to the pressure of the gas and the viscosity between the films, the air inlet space between the air valve film and the lower film becomes smaller and smaller until it is completely fitted and the air inlet is locked. At the same time, since the air valve film and the upper film are adhered, the gas cannot escape from between the air valve film and the upper film, thereby realizing the automatic inflation air locking function.

[0003] The prior art represented by the above-mentioned patent document, since the inflation channel between the air valve membrane and the lower film is sealed by opening and closing a single air valve membrane, this structural form will leak after the airbag is inflated and stored for a certain period of time. If the leakage of the existing packaging airbag from the membrane valve is solved, it is a problem that needs to be solved for the current packaging and transportation inflatable airbags. Summary of the invention

[0004] The object of the present invention is to provide an inflatable air bag with a multi-layer membrane type anti-leakage valve and good air-locking performance.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: An inflatable airbag with a multi-layer membrane anti-leakage valve comprises a multi-layer membrane anti-leakage valve, wherein the multi-layer membrane anti-leakage valve comprises two outer valve membranes and one or more inner valve membranes, wherein the outer valve membrane and the inner valve membrane are pressed and overlapped together, and the one or more inner valve membranes are thermally located between the two outer valve membranes, wherein in the airflow direction, the length of the inner valve membrane is smaller than the length of the outer valve membrane, a primary one-way valve airflow channel is formed between the inner valve membrane and the outer valve membrane, or between the inner valve membranes, and a final one-way valve airflow channel is formed between the two outer valve membranes, and the airflow flows to the final one-way valve airflow channel through the primary one-way valve airflow channel.

[0006] Furthermore, two inner valve membranes are provided, and in the airflow direction, the two inner valve membranes have the same length, and a primary one-way valve type airflow channel is formed between the two inner valve membranes.

[0007] Furthermore, the inner valve membranes are provided with two, and in the airflow direction, the length of one of the inner valve membranes is smaller than that of the other inner valve membrane, and a first primary one-way valve type airflow channel is formed between the shorter inner valve membrane and the longer inner valve membrane; a second primary one-way valve type airflow channel is formed between the longer inner valve membrane and the outer valve membrane, and the airflow flows to the second primary one-way valve type airflow channel through the first primary one-way valve type airflow channel.

[0008] Furthermore, the inner valve membranes are provided with two, and in the airflow direction, the length of one of the inner valve membranes is smaller than the length of the other inner valve membrane, and a first primary one-way valve type airflow channel is formed between the shorter inner valve membrane and the outer valve membrane; a second primary one-way valve type airflow channel is formed between the longer inner valve membrane and the outer valve membrane, and the airflow flows to the second primary one-way valve type airflow channel through the first primary one-way valve type airflow channel.

[0009] Furthermore, the air outlet of the first primary one-way valve type airflow channel is smaller than the air inlet of the second primary one-way valve type airflow channel.

[0010] Furthermore, a non-return type hot pressing block is provided at the outlet of the final one-way valve type airflow channel and the outlet of the primary one-way valve type airflow channel.

[0011] Furthermore, an inflatable airbag with a multi-layer membrane anti-leakage valve comprises a common inflation airway and a plurality of airbag bodies arranged side by side, wherein the multi-layer membrane anti-leakage valve is arranged on the airbag body, and the airflow enters the airbag body through the common inflation airway via the multi-layer membrane anti-leakage valve; the two outer valve membranes are an outer valve membrane A and an outer valve membrane B, and a heat-resistant zone is provided on the inner valve membrane and at the position of the air inlet end, and a transverse sealing hot pressing line is provided near the air inlet end, and the transverse sealing hot pressing line passes through the heat-resistant zone to continuously hot-press the outer valve membrane A, the inner valve membrane and the outer valve membrane B together, and at the position of the heat-resistant zone, the two inner valve membranes are not connected to form an air inlet, and the outer valve membrane A, the outer valve membrane B and the inner valve The door membranes are heat-pressed and sealed to be connected; two first airway contour heat-pressing lines are provided on both sides of the heat-resistant zone, and the two first airway contour heat-pressing lines continuously heat-press the outer valve membrane A, the inner valve membrane and the outer valve membrane B together, and the area between the two first airway contour heat-pressing lines is the first primary one-way valve type airflow channel; two second airway contour heat-pressing lines are provided on both sides of the air outlet of the first primary one-way valve type airflow channel, and the area between the two second airway contour heat-pressing lines is the second primary one-way valve type airflow channel; two third airway contour heat-pressing lines are provided on both sides of the air outlet of the second primary one-way valve type airflow channel, and the area between the two third airway contour heat-pressing lines is the final one-way valve type airflow channel.

[0012] Furthermore, the two first airway contour heat-pressing lines, the two second airway contour heat-pressing lines and the two third airway contour heat-pressing lines are all in a closed figure-eight shape and the airflow channel gradually narrows along the air intake direction.

[0013] Furthermore, the plurality of airbag bodies arranged side by side are provided with discontinuous heat pressing lines, and the airbag bodies can be folded at the discontinuous heat pressing lines, or after the airbags are folded at the discontinuous heat pressing lines, both sides are heat-sealed to form a bag shape.

[0014] Furthermore, the multi-layer membrane type anti-leakage valve is connected to the airbag body by hot pressing, or the multi-layer membrane type anti-leakage valve is suspended in the airbag body.

[0015] The beneficial effects of the present invention are: The present application forms a multi-level one-way valve type airflow channel by adding an inner film layer between the diaphragm valves to improve the air-locking effect of the diaphragm valves, thereby solving the problem of air leakage from the diaphragm valves in the existing packaging airbags.

[0016] The present application adds a hot pressing block with a check function at the air outlet of each stage of the one-way valve type airflow channel to improve the air-tightness. In particular, each stage of the one-way valve type airflow channel adopts an eight-shaped width gradient airflow channel, and the air outlet of the first primary one-way valve type airflow channel is smaller than the air inlet of the second primary one-way valve type airflow channel. This design allows the diaphragm at the air outlet of each stage of the one-way valve type airflow channel to have a certain opening and closing space, and improves the sealing performance between the diaphragms at the air outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described with the aid of the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other accompanying drawings according to the following drawings without creative work: Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 for Figure 1 The cross-sectional view along line AA is shown; Figure 3 This is a schematic diagram of the structure of a four-layer membrane type air leakage prevention valve when two inner valve membranes of the present invention are of equal length; Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 5 for Figure 4 Shown is a cross-sectional view along line BB.

[0018] In the figure: 1. Outer valve membrane A; 2. Outer valve membrane B; 3. Shorter inner valve membrane; 4. Longer inner valve membrane; 5. First primary one-way valve type airflow channel; 6. Second primary one-way valve type airflow channel; 7. Final one-way valve type airflow channel; 8. Check-type hot pressing block; 9. Air inlet; 10. Heat-resistant area; 11. Horizontal sealing hot pressing line; 12. Air inlet; 13. First airway contour hot pressing line; 14. Air outlet of the first primary one-way valve type airflow channel; 15. Second airway contour hot pressing Line; 16, the air outlet of the second primary one-way valve type airflow channel; 17, the third airway contour hot pressing line; 18, the discontinuous hot pressing line; 19, the four-layer membrane type anti-leakage valve; 20, the public inflation airway; 21, the airbag body; 22, the primary one-way valve type airflow channel; 23, the inner valve membrane; 24, the outer valve membrane; 25, the primary one-way valve type airflow channel; 26, the final one-way valve type airflow channel of the three-layer membrane type anti-leakage valve; 27, the hot pressing block for check; 28, the three-layer membrane type anti-leakage valve. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper surface", "lower surface", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "forward", "reverse", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] Embodiment 1: like Figure 1 , 2 As shown, an inflatable airbag with a multi-layer membrane anti-leakage valve includes a multi-layer membrane anti-leakage valve which is a four-layer membrane anti-leakage valve, the four-layer membrane anti-leakage valve including two outer valve membranes and two inner valve membranes, the outer valve membranes and the inner valve membranes are pressed and overlapped together, and the two inner valve membranes are thermally located between the two outer valve membranes, and in the airflow direction, the length of the inner valve membrane is smaller than the length of the outer valve membrane. Specifically, the two outer valve membranes are the outer valve membrane A1 and the outer valve membrane B2, and the two inner valve membranes, in the airflow direction, the length of one of the inner valve membranes is shorter than the length of the other inner valve membrane, and the two inner valve membranes are referred to as the shorter inner valve membrane 3 and the longer inner valve membrane 4, and a first primary one-way valve type airflow channel 5 is formed between the shorter inner valve membrane 3 and the longer inner valve membrane 4; a second primary one-way valve type airflow channel 6 is formed between the longer inner valve membrane 4 and the outer valve membrane A1, and a final one-way valve type airflow channel 7 is formed between the outer valve membrane A1 and the outer valve membrane B2, and the airflow flows to the second primary one-way valve type airflow channel 6 through the first primary one-way valve type airflow channel 5, and flows to the final one-way valve type airflow channel 7 through the second primary one-way valve type airflow channel 6.

[0022] It should be noted that: in addition to the above-mentioned formation method, the first primary one-way valve type airflow channel 5 and the second primary one-way valve type airflow channel 6 can also be formed in another formation method. For example, the outer valve membrane A1 is used as a common membrane layer to form the first primary one-way valve type airflow channel, the second primary one-way valve type airflow channel and the final one-way valve type airflow channel in sequence with the shorter inner valve membrane 3, the longer inner valve membrane 4 and the outer valve membrane B2.

[0023] The air outlet of the first primary one-way valve airflow channel is smaller than the air inlet of the second primary one-way valve airflow channel. A non-return type hot pressing block 8 is provided at the outlet of the final one-way valve airflow channel 7, the outlet of the first primary one-way valve airflow channel 5 and the outlet of the second primary one-way valve airflow channel 6.

[0024] A heat-resistant zone 10 is provided on the inner valve membrane and at the position of the air inlet end 9, and a transverse sealing hot pressing line 11 is provided near the air inlet end 9. The transverse sealing hot pressing line 11 passes through the heat-resistant zone 10, and continuously hot-presses the outer valve membrane A1, the two inner valve membranes and the outer valve membrane B2 together. At the position of the heat-resistant zone 10, the two inner valve membranes are not connected, and an air inlet 12 is formed. The outer valve membrane A1, the outer valve membrane B2 and the two inner valve membranes are hot-pressed and sealed. Two first airway contour hot pressing lines 13 are provided on both sides of the heat-resistant zone 10. The two first airway contour hot pressing lines 13 connect the outer valve membrane A1, the two inner valve membranes, and the air inlet 12. The inner valve membrane and the outer valve membrane B2 are continuously hot-pressed together, and the area between the two first airway contour hot-pressing lines 13 is the first primary one-way valve type airflow channel 5; two second airway contour hot-pressing lines 15 are provided on both sides of the air outlet 14 of the first primary one-way valve type airflow channel, and the area between the two second airway contour hot-pressing lines 15 is the second primary one-way valve type airflow channel 6; two third airway contour hot-pressing lines 17 are provided on both sides of the air outlet 16 of the second primary one-way valve type airflow channel, and the area between the two third airway contour hot-pressing lines 17 is the final one-way valve type airflow channel 7.

[0025] The two first airway contour hot pressing lines 13, the two second airway contour hot pressing lines 15 and the two third airway contour hot pressing lines 17 are all in a closed figure eight shape and the airflow channel gradually narrows along the air intake direction.

[0026] The inflatable airbag with a multi-layer membrane anti-leakage valve comprises a common inflatable airway 20 and a plurality of airbag bodies 21 arranged side by side. The multi-layer membrane anti-leakage valve adopts a four-layer membrane anti-leakage valve 19, which is arranged on the airbag body 21. The airflow passes through the common inflatable airway 20 and the multi-layer membrane anti-leakage valve 19 into the airbag body 21. The plurality of airbag bodies arranged side by side are provided with two discontinuous hot pressing lines 18, and the airbag body can be folded at the discontinuous hot pressing lines, or after the airbag is folded at the discontinuous hot pressing lines, both sides of the entire inflatable airbag are heat-sealed to form a bag shape. The four-layer membrane anti-leakage valve 19 is hot-pressedly connected to the airbag body 21.

[0027] In addition, it should be noted that: Figure 3As shown, in the airflow direction, the two inner valve membranes 23 in the four-layer membrane anti-leakage valve are of equal length. At this time, a primary one-way valve type airflow channel 22 is formed between the two inner valve membranes 23, and there is only one primary one-way valve type airflow channel, and there is no problem of a first primary one-way valve type airflow channel and a second primary one-way valve type airflow channel.

[0028] In the present embodiment 1, a hot pressing block with a check function is added at the air outlet of each stage of the one-way valve type airflow channel to improve the air-tightness. In particular, each stage of the one-way valve type airflow channel adopts an eight-shaped width gradient airflow channel, and the air outlet of the first primary one-way valve type airflow channel is smaller than the air inlet of the second primary one-way valve type airflow channel. This design allows the diaphragm at the air outlet of each stage of the one-way valve type airflow channel to have a certain opening and closing space, and improves the sealing performance between the diaphragms at the air outlet.

[0029] Embodiment 2: like Figure 4 , 5 As shown, an inflatable airbag with a multi-layer membrane anti-leakage valve includes a common inflation airway 20, a plurality of airbag bodies 21 arranged side by side, and a multi-layer membrane anti-leakage valve. Compared with Example 1, the multi-layer membrane anti-leakage valve in this embodiment adopts a three-layer membrane anti-leakage valve 28. The three-layer membrane anti-leakage valve 28 is arranged on the airbag body 21, and the airflow passes through the common inflation airway 20 and enters the airbag body 21 through the three-layer membrane anti-leakage valve 28.

[0030] The three-layer membrane type anti-leakage valve 28 includes two outer valve membranes 24 and an inner valve membrane 23, the outer valve membrane 24 and the inner valve membrane 23 are pressed together, and one inner valve membrane 23 is thermally located between the two outer valve membranes 24. In the airflow direction, the length of the inner valve membrane 23 is smaller than the length of the outer valve membrane 24. A primary one-way valve type airflow channel 25 of the three-layer membrane type anti-leakage valve is formed between the inner valve membrane 23 and one of the outer valve membranes 24, and a final one-way valve type airflow channel 26 of the three-layer membrane type anti-leakage valve is formed between the two outer valve membranes. The airflow of the three-layer membrane type anti-leakage valve flows to the final one-way valve type airflow channel 26 of the three-layer membrane type anti-leakage valve through the primary one-way valve type airflow channel 25 of the three-layer membrane type anti-leakage valve.

[0031] A non-return hot pressing block 27 is provided at the outlet of the final non-return valve type air flow channel 26 of the three-layer membrane type anti-leakage valve and at the outlet of the primary non-return valve type air flow channel 25 of the three-layer membrane type anti-leakage valve.

[0032] In addition, in this embodiment 2, if necessary, two discontinuous hot pressing lines can be provided on the plurality of airbag bodies arranged side by side, and the airbag body can be folded at the discontinuous hot pressing lines, and after the airbag body is folded at the discontinuous hot pressing lines, both sides of the entire inflatable airbag are heat-sealed to form a bag shape. The three-layer membrane anti-leakage valve is connected to the airbag body by hot pressing.

[0033] Working principle: The present application forms a multi-level one-way valve type airflow channel by adding an inner film layer between the membrane valves. Each additional inner film layer provides an additional one-way valve type airflow channel to improve the air-tightness of the membrane valve, so as to solve the problem of air leakage from the membrane valve in the existing packaging airbag. In addition to the anti-leakage valve with a four-layer membrane structure in the above-mentioned embodiment 1 and the anti-leakage valve with a three-layer membrane structure in embodiment 2, an anti-leakage valve with a five-layer membrane structure can also be used. Usually, the five-layer membrane structure has a four-level one-way valve type airflow channel, and the six-layer membrane structure has a five-level one-way valve type airflow channel. Similarly, the seven-layer membrane structure has a six-level one-way valve type airflow channel. The more layers, the better the air tightness. The number of membranes can be adjusted according to actual needs.

[0034] In addition, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined without contradiction. Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention.

Claims

1. An inflatable airbag with a multi-layer membrane anti-leakage valve, characterized in that: It comprises a multi-layer membrane type anti-leakage air valve, which comprises two outer valve membranes and one or more inner valve membranes, wherein the outer valve membrane and the inner valve membrane are pressed and overlapped together, and the one or more inner valve membranes are thermally located between the two outer valve membranes, and in the airflow direction, the length of the inner valve membrane is smaller than the length of the outer valve membrane, a primary one-way valve type airflow channel is formed between the inner valve membrane and the outer valve membrane, or between the inner valve membranes, and a final one-way valve type airflow channel is formed between the two outer valve membranes, and the airflow flows to the final one-way valve type airflow channel through the primary one-way valve type airflow channel.

2. The inflatable airbag with a multi-layer membrane anti-leakage valve according to claim 1, characterized in that: The inner valve membranes are provided with two, and in the airflow direction, the two inner valve membranes have the same length, and a primary one-way valve type airflow channel is formed between the two inner valve membranes.

3. The inflatable airbag with a multi-layer membrane anti-leakage valve according to claim 1, characterized in that: The inner valve membranes are provided with two, and in the airflow direction, the length of one of the inner valve membranes is smaller than that of the other inner valve membrane, and a first primary one-way valve type airflow channel is formed between the shorter inner valve membrane and the longer inner valve membrane; a second primary one-way valve type airflow channel is formed between the longer inner valve membrane and the outer valve membrane, and the airflow flows to the second primary one-way valve type airflow channel through the first primary one-way valve type airflow channel.

4. The inflatable airbag with a multi-layer membrane anti-leakage valve according to claim 1, characterized in that: The inner valve membranes are provided with two, and in the airflow direction, the length of one of the inner valve membranes is smaller than that of the other inner valve membrane, and a first primary one-way valve type airflow channel is formed between the shorter inner valve membrane and the outer valve membrane; a second primary one-way valve type airflow channel is formed between the longer inner valve membrane and the outer valve membrane, and the airflow flows to the second primary one-way valve type airflow channel through the first primary one-way valve type airflow channel.

5. The inflatable airbag with a multi-layer membrane anti-leakage valve according to claim 4, characterized in that: The air outlet of the first primary one-way valve type airflow channel is smaller than the air inlet of the second primary one-way valve type airflow channel.

6. The inflatable airbag with a multi-layer membrane anti-leakage valve according to claim 5, characterized in that: The outlet of the final one-way valve type airflow channel and the outlet of the primary one-way valve type airflow channel are provided with non-return type hot pressing blocks.

7. The inflatable airbag with a multi-layer membrane anti-leakage valve according to claim 6, characterized in that: It includes a common inflation airway and a plurality of airbag bodies arranged side by side, the multi-layer membrane anti-leakage valve is arranged on the airbag body, and the airflow enters the airbag body through the common inflation airway via the multi-layer membrane anti-leakage valve; the two outer valve membranes are outer valve membrane A and outer valve membrane B, a heat-resistant zone is arranged on the inner valve membrane and at the air inlet end, a transverse sealing hot pressing line is arranged near the air inlet end, the transverse sealing hot pressing line passes through the heat-resistant zone, and the outer valve membrane A, the inner valve membrane and the outer valve membrane B are continuously hot-pressed together, at the heat-resistant zone, the two inner valve membranes are not connected to each other, forming an air inlet, and the outer valve membrane A, the outer valve membrane B and the inner valve membrane are hot-pressed and sealed; Two first airway contour heat pressing lines are provided on both sides of the heat-resistant zone, and the two first airway contour heat pressing lines continuously hot-press the outer valve membrane A, the inner valve membrane and the outer valve membrane B together, and the area between the two first airway contour heat pressing lines is the first primary one-way valve type airflow channel; two second airway contour heat pressing lines are provided on both sides of the air outlet of the first primary one-way valve type airflow channel, and the area between the two second airway contour heat pressing lines is the second primary one-way valve type airflow channel; two third airway contour heat pressing lines are provided on both sides of the air outlet of the second primary one-way valve type airflow channel, and the area between the two third airway contour heat pressing lines is the final one-way valve type airflow channel.

8. The inflatable airbag with a multi-layer membrane anti-leakage valve according to claim 7, characterized in that: The two first airway contour heat-pressing lines, the two second airway contour heat-pressing lines and the two third airway contour heat-pressing lines are all in a closed figure-eight shape and the airflow channel gradually narrows along the air intake direction.

9. The inflatable airbag with a multi-layer membrane anti-leakage valve according to claim 8, characterized in that: The plurality of airbag bodies arranged side by side are provided with discontinuous heat pressing lines, and the airbag bodies can be folded at the discontinuous heat pressing lines, or after the airbags are folded at the discontinuous heat pressing lines, the two sides are heat-sealed to form a bag shape.

10. The inflatable airbag with a multi-layer membrane anti-leakage valve according to claim 8, characterized in that: The multi-layer membrane type anti-leakage valve is connected to the airbag body by hot pressing, or the multi-layer membrane type anti-leakage valve is suspended in the airbag body.

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