CN2687056Y - Inflatable Shockproof Bag - Google Patents

Abstract

The inflatable packaging bag has the structure that: the peripheries of the two layers of plastic films are bonded and sealed by hot pressing, and the upper end of the bag body is folded downwards; the lower extreme is folding upwards, and both ends are relative, forms the space of ring closure, its characterized in that: the middle of the peripheral closed edge is also provided with a plurality of isolation lines which fixedly connect the two layers of films, the inflatable bag is divided into a plurality of inflators, each inflator is respectively provided with a respective air inlet, all the air inlets are arranged in a common air inlet channel, the air inlet channel is provided with an air inlet, the air inlet of each inflator is provided with a one-way valve, and the structure of the one-way valve is as follows: two layers of air valve films parallel to the plastic film are arranged in the air inlet. This design has improved the reliability of gas bag: when the film of the packaging bag is partially damaged, only individual inflator pumps are affected, and other inflator pumps can be kept unchanged to continuously keep good shockproof effect; the air inlet with the new structure has simple and reliable structure and low cost, and keeps the good function of unidirectional air inlet.

Description

Inflatable Shockproof Bag

technical field

The utility model relates to a packaging material, in particular to an inflatable shockproof bag.

Background technique

Traditional packaging shockproof materials include corrugated paper and bubble plastic film. The former is close to being eliminated due to limited shockproof effect; the latter is still widely used, but due to the limitation of the structure itself, the thickness of the bubble plastic film cannot be made very thick, so its shockproof effect is also limited. In particular, this air bubble plastic film cannot fill all the gaps between the packing box and the packaged object, and the movement and impact of the object will occur during transportation, thus causing damage. In order to overcome the above deficiencies, a kind of inflatable packaging bag has appeared. Its structure is: two layers of plastic film are sealed by hot pressing, the upper two ends of the bag body are folded downward; the lower end is folded upward, and the two ends are opposite to form a ring. Closed space for placing items to be packed. Simultaneously, several connecting lines formed by hot pressing are arranged between the two layers of films, so as to prevent the middle part of the film from expanding too much into a spherical shape after being inflated. The air-filled packaging bag is also provided with an air inlet with the function of a one-way valve. The inflatable packaging bag can be used directly as the outer packaging of the goods, or as a filler between the goods and the packing box, filling the gap between the object and the packing box, its thickness can be larger, and the shockproof and cushioning effects are also greatly improved. But there are also some deficiencies: first, in the process of storage or transportation, once the plastic film breaks, the gas will all escape, and the entire inflatable bag will collapse, and thus lose the shockproof effect; second, the structure of the air inlet is too large. Complicated and expensive.

Contents of the invention

The purpose of this utility model is to provide an inflatable packaging bag with a new structure. While maintaining the advantages of the inflatable packaging bag in the prior art, the new structure will overcome its disadvantages: to improve its reliability, when the film of the inflatable packaging bag is partially damaged At the same time, the basic shape can be kept unchanged to continue to maintain its good shockproof effect; secondly, the air inlet of the new structure has a simple and reliable structure, low cost, and at the same time retains its good function of one-way air intake.

The technical solution for completing the above invention task is: an inflatable packaging bag, the structure of which is: two layers of plastic film are sealed by hot-press bonding, the upper end of the bag body is folded downward; the lower end is folded upward, and the two ends are opposite to form a closed space. , which is characterized in that: several isolation lines are arranged in the middle of the surrounding closed edges, the isolation lines fix and connect the two layers of films, and divide the inflatable bag into several inflatable tubes, each inflatable tube is provided with its own air inlet, All the air inlets are arranged in the common air inlet passage, the air inlet passage is provided with the air inlet, and the air inlet of each inflator is provided with a one-way valve, and the structure of the one-way valve is: set in the air inlet There are two layers of air valve film parallel to the plastic film. The above-mentioned "two-layer plastic film" constitutes the cylinder wall of the inflatable cylinder. The film can adopt plastic film, rubber film, plastic film or other flexible films.

The main difference between this design and the prior art is:

First, change "several connection lines between two layers of film" to "isolation line", that is, each inflator is connected completely airtight, and any one of the inflators is damaged or leaks will not affect the other. The inflatable cylinder continues to keep filling; the so-called "isolation line" can be formed by hot pressing; it can also be formed by other methods such as bonding.

Secondly, in this design, a general air inlet is changed to each inflator being provided with an air inlet, and each air inlet is inflated through a common air inlet channel, which can be hot-pressed on a plastic film. A closed area, the closed area is perpendicular to each inflatable cylinder. Other inflatable conduit forms are also possible. Its position can be set at opposite ends of the inflatable cylinder; it can also be set at one end of the entire inflatable packaging bag.

Third, the one-way valve of the air intake of the new structure is composed of two layers of air valve films inside. Due to the flexibility of the film, when inflated, the external air pressure is higher than the air pressure inside the cylinder, the two-layer air valve film is "blown open", and the gas can enter the cylinder smoothly; after inflation, the air pressure inside the cylinder is higher than the external air pressure, and The inflatable packaging bag expands due to inflation, and the cylinder wall near the air inlet (that is, the two layers of plastic film that constitutes the inflatable packaging bag) is no longer a parallel two-layer film, but stretches around, and the two-layer air valve film is compressed by the internal air pressure. Press against the cylinder wall and bend to seal the air inlet and prevent air leakage.

The optimization scheme of this design is: near the air inlet, two air intake connecting lines are set between the two layers of air valve films and the cylinder wall on one side. The tube wall films are fixedly connected together. The two air intake connection lines are preferably arranged in a non-parallel manner, and the distance between the ends close to the air intake is wider, so as to define the area of the air intake and strengthen the function of the one-way valve of the air intake. The air intake connection line can be formed by hot pressing, or by bonding or other methods.

This scheme also has the following further optimization schemes:

1. Set up an "air intake connection branch line" between the air intake connection line and the isolation line of the inflator to ensure the airtightness near the air intake;

2. At the position where the two-layer air valve film and the cylinder wall on one side are provided with the air intake connection line, the cylinder wall on the other side is provided with an anti-heat pressure layer. The anti-heat pressure layer can be aluminum foil, or other materials such as non-thermoplastic films. The purpose of setting the anti-heat pressing layer is to simplify the processing technology: when using the hot pressing method to set the air intake connecting line, it can be directly hot-pressed on the outside of the four-layer film. Because of the existence of the heat-resistant pressing layer, there is One side of the anti-heat pressure layer will not thermally bond with the air valve film, while the three-layer film on the other side can naturally form an air intake connecting line.

The air inlet of the air inlet channel of the inflatable packaging bag may be provided with a one-way valve or not.

The utility model overcomes the deficiency of the inflatable packaging bag in the prior art and improves its reliability: when the film of the inflatable packaging bag is partially damaged, only individual inflatable cylinders are affected, and other inflatable cylinders can keep their basic shapes unchanged , can continue to maintain a good shockproof effect; the air intake of the new structure is simple and reliable in structure, low in cost, and at the same time retains its good function of one-way air intake. At the same time, the new structure also maintains all the advantages of the inflatable packaging bag in the prior art: the inflatable packaging bag can be used directly as the outer packaging of the goods, and can also be used as a filler between the goods and the packing box. The inflatable packaging bag can be filled with objects and The thickness of the gap between the packing boxes can be made larger according to the needs, and the shockproof and cushioning effects are also relatively high.

Description of drawings

Fig. 1 is the embodiment 1 of the present application, the schematic diagram of the structure of the inflatable packaging bag;

Fig. 2 is a schematic structural view of an inflator in the inflatable packaging bag in Fig. 1;

Fig. 3 is a schematic diagram of a cross section at A-A in Fig. 2;

Fig. 4 is a schematic diagram of the state after Fig. 3 is inflated;

Figure 5 and Figure 6 are schematic diagrams of the structure of the air inlet valve membrane;

Fig. 7 is a state diagram of the inflatable packaging bag in Example 1 after inflation.

Detailed ways

Embodiment 1, referring to Figures 1 to 4: the inflatable packaging bag 1 is composed of two layers of plastic films, which are respectively referred to as the upper film 21 and the lower film 22 for the convenience of description, and the surroundings of the upper film 21 and the lower film 22 are bonded by heat and pressure. Closed: The closed lines at the upper and lower ends are 38 and 40 respectively. Inside the closed line 38 , another closed line 37 is provided, and the air intake channel 14 is formed between the closed lines 37 and 38 . The upper end of the bag body is folded downward to form folding lines 42 , 44 ; the lower end is folded upward to form folding lines 41 , 43 . After folding, the two ends face each other, and the middle part 62 and the folded part 61 of the inflatable bag form a closed space and an opening 50 . The opening 50 is used for loading goods. In the vertical direction with the closed lines 38 and 40 at the upper and lower ends, in addition to the closed sides, there are also several parallel closed lines in the middle, that is, the isolation line 31. The isolation line 31 divides the inflatable bag into several inflatable cylinders 10, each inflated The tubes are respectively provided with their own air inlets 33, and all the air inlets are located in the common air inlet passage 14, the air inlet passage 14 is provided with the air inlet 2, and the air inlet 33 of each inflatable cylinder is provided with a one-way Valve, the structure of this one-way valve is: be provided with two layers of air valve films 25,26 parallel with plastic films 21,22 in the air inlet. Near the air inlet, between two layers of air valve films 25, 26 and the cylinder wall 21 on one side, two air intake connection lines 32 are formed by hot pressing, which connect the two layers of air valve films to the side wall 21. The tube wall films 21 are fixedly connected together. The distance between the ends of the two air intake connecting lines 32 close to the air inlet is relatively wide, and they are not arranged in parallel. An air intake connection branch line 39 is also provided between the air intake connection line 32 and the inflator isolation line 31 . At the positions of the intake connection line 32 and the intake connection branch line 39 , an anti-heat pressure layer 33 is provided on the cylinder wall. Referring to Figure 5: when inflating, the external air reaches the air inlet 33 through the air intake channel 14, and because the external air pressure is higher than the air pressure inside the cylinder, the two layers of air valve films 25 and 26 are "blown open", and the gas enters the cylinder smoothly; refer to Figure 6: After inflation, the air pressure inside the cylinder is higher than the external air pressure, and after the inflatable packaging bag is inflated, the cylinder wall near the air inlet stretches around, and the two-layer air valve film is pressed against the cylinder wall by the internal air pressure and bends, thus Close the air inlet to achieve the effect of preventing air leakage. Figure 7 is a perspective view of the design.

The present invention is not limited to these disclosed embodiments, but the present invention will cover the scope described in the patent claims, as well as various modifications and equivalent changes within the scope of the claims.

Claims (6)

1. An inflatable packaging bag, the structure of which is as follows: two layers of plastic film are sealed by hot-press bonding, the upper end of the bag body is folded downward; the lower end is folded upward, and the two ends are opposite to each other to form a closed space, which is characterized in that: There are also several isolation lines arranged in the middle of the surrounding closed sides. The isolation lines fix the two layers of film and divide the inflatable bag into several inflatable cylinders. Each inflatable cylinder is provided with its own air inlet respectively. In the common air intake passage, the air intake passage is provided with an air inlet, and the air inlet of each inflator is provided with a one-way valve. The film is parallel to the air valve film. 2. The inflatable packaging bag according to claim 1, characterized in that: near the air inlet, two air inlet connection lines are arranged between the two layers of air valve films and the cylinder wall on one side, and the air inlet connection The two layers of air valve films are fixedly connected with the cylinder wall film on one side by wires. 3. The air-filled packaging bag according to claim 2, characterized in that: an air-intake branch line is also set between the air-intake connection line and the inflator isolation line. 4. The inflatable packaging bag according to claim 1, 2 or 3, characterized in that: at the position where the two-layer air valve film and the cylinder wall on one side are provided with an air intake connection line, on the cylinder wall on the other side Equipped with a heat-resistant laminate. 5. The inflatable packaging bag according to claim 1, 2 or 3, characterized in that: the air inlet channel is arranged at opposite ends of the inflatable cylinder; or arranged at one end of the entire inflatable packaging bag. 6. The inflatable packaging bag according to claim 4, characterized in that: the air inlet channel is arranged at opposite ends of the inflatable cylinder; or arranged at one end of the entire inflatable packaging bag.

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