Vacuum compression bag

Abstract

The utility model discloses a vacuum compression bag which comprises a three-dimensional bag body, an opening and a buckling structure used for sealing the opening are arranged at the upper end of the three-dimensional bag body, and the three-dimensional bag body comprises a first side film, a second side film and a bottom film formed at the bottom of the three-dimensional bag body, the bottom film is folded along the center of the bottom film to form a bottom film A and a bottom film B. A lining pair is arranged between the first side film and the bottom film A or / and between the second side film and the bottom film B. The lining pair comprises a lining A and a lining B. The lining A and the side films are subjected to heat sealing, the lining B and the bottom film are subjected to heat sealing, a lower sealing strip is arranged between the lining A and the lining B in a heat sealing mode, and a one-way exhaust channel is arranged between the lining A and the lining B. The one-way exhaust channel is arranged on the lower portion of the three-dimensional bag body or close to the lower portion of the three-dimensional bag body, through the arrangement, air gathered in the three-dimensional bag body can be rapidly exhausted without an exhaust valve, the one-way exhaust channel can be automatically closed after the three-dimensional bag body exhausts air, and therefore air backflow is effectively blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging bags, in particular to a vacuum compression bag. Background Art

[0002] A vacuum compression bag is a bag that is compressed naturally by the atmospheric pressure after the air is extracted. It is moisture-proof, mildew-proof, moth-proof, and odor-proof.

[0003] With the development of vacuum compression bag technology, technicians have developed a three-dimensional vacuum compression bag, which can be placed upright and stably when filled with items. For example, the vacuum compression bag disclosed in Chinese patent authorization announcement number CN108996000B can be placed stably. The bag body of the vacuum compression bag includes a side film formed on the side of the bag body and a bottom film formed on the bottom of the bag body. The side film is a first side film and a second side film arranged on both sides of the bottom film. The bottom film includes a first bottom surface and a second bottom surface. The bottom edges of the first bottom surface and the second bottom surface are respectively pressed with the bottom edges of the first side film and the second side film. The two sides of the first bottom surface and the second bottom surface are respectively pressed with the lower sections of the two sides of the first side film and the second side film. The upper sections of the two sides of the first side film are pressed with the upper sections of the two sides of the second side film. The bag body is provided with an exhaust valve, and the air in the bag body is discharged out of the bag body through the exhaust valve. Since the exhaust valve is expensive, the exhaust valve provided on the bag body will make the production cost of the vacuum compression bag high, thereby losing the competitive advantage. In response to this technical problem, the present application proposes a three-dimensional vacuum compression bag that does not require an exhaust valve. Utility Model Content

[0004] The utility model aims to provide a vacuum compression bag, which can quickly discharge the air accumulated in a three-dimensional bag body without an exhaust valve, and the one-way exhaust channel can automatically close after the three-dimensional bag body is exhausted, thereby effectively blocking air backflow.

[0005] The above-mentioned technical purpose of the utility model is achieved through the following technical solutions: a vacuum compression bag, including a three-dimensional bag body, an upper end of the three-dimensional bag body is provided with an opening and a buckle structure for sealing the opening, the three-dimensional bag body includes a first side film and a second side film formed on both sides of the bag body and a bottom film formed at the bottom of the three-dimensional bag body, the bottom film is folded along its center to form a bottom film A and a bottom film B, a liner pair is provided between the first side film and the bottom film A or / and between the second side film and the bottom film B, the liner pair includes a liner A and a liner B, the liner A is heat-sealed with the side film, the liner B is heat-sealed with the bottom film, a lower sealing strip is heat-sealed between the liner A and the liner B, a one-way exhaust channel is provided between the liner A and the liner B, the one-way exhaust channel is provided at the lower position of the three-dimensional bag body or close to the lower position, the air in the three-dimensional bag body is discharged to the outside through the one-way exhaust channel, and the one-way exhaust channel blocks air backflow through the electrostatic adsorption of the liner A and the liner B.

[0006] Furthermore, the one-way exhaust passage has an air inlet and an exhaust outlet. The air inlet is communicated with the inside of the three-dimensional bag body, and the exhaust outlet is communicated with the outside. The position of the air inlet is arranged opposite to or offset from the position of the exhaust outlet. When the position of the air inlet is arranged opposite to the position of the exhaust outlet, the distance between the air inlet and the exhaust outlet is greater than or equal to 3 cm.

[0007] Furthermore, there are two exhaust outlets, including a first exhaust outlet and a second exhaust outlet arranged at a horizontal interval. The first exhaust outlet is arranged offset from the air inlet, and the second exhaust outlet is arranged opposite to the air inlet.

[0008] Furthermore, the lower sealing strip includes a lower sealing strip A and a lower sealing strip B arranged at the lower part or near the lower part of the inner lining pair. The lower sealing strip A and the lower sealing strip B are arranged offset to form a one-way exhaust passage.

[0009] Furthermore, the lower sealing strip A extends in a Z shape from the center of the three-dimensional bag body to both sides of the three-dimensional bag body. One end of the lower sealing strip A extends towards the side end of the three-dimensional bag body and is connected to the side sealing strip of the three-dimensional bag body. The other end of the lower sealing strip A extends towards the side sealing strip on the other side of the three-dimensional bag body and leaves a gap space A with the side sealing strip on this side. This gap space A constitutes the air inlet of the one-way exhaust passage.

[0010] Furthermore, the first side film and the second side film are heat-sealed to form a guiding strip, and the guiding strip is inclined from the side end to the center from top to bottom.

[0011] Furthermore, the bottom film is a double-layer composite material. The first side of the bottom film is PE, the other side of the bottom film is PET or nylon, and the first side of the bottom film is used for heat-sealing connection with the first side film and the second side film.

[0012] Furthermore, the materials of the inner lining A and the inner lining B are PE.

[0013] Furthermore, the height of the inner lining A and the inner lining B is between 30 mm and 70 mm.

[0014] Furthermore, both sides of one end of the first side film corresponding to the bottom film A are heat-sealed to both sides of the bottom film A correspondingly. Both sides of one end of the second side film corresponding to the bottom film B are heat-sealed to both sides of the bottom film B correspondingly. Both sides of the other end of the first side film corresponding to the bottom film A are heat-sealed to both sides of the other end of the second side film corresponding to the bottom film B correspondingly.

[0015] In summary, the present utility model has the following beneficial effects:

[0016] 1. For the vacuum compression bag of the present utility model, the structure of the one-way exhaust passage is arranged at the bottom of the three-dimensional bag body, and the air accumulated in the three-dimensional bag body can be quickly discharged without an exhaust valve, thereby effectively reducing the production cost of the vacuum compression bag;

[0017] 2. The vacuum compression bag of the present utility model adds a pair of liners between the side film and the bottom film. The electrostatic adsorption effect between liner A and liner B is utilized to block the air backflow. Specifically, in order to make the overall product soft and non-adhesive, an anti-blocking agent, that is, an additive such as talcum powder, needs to be added to the plastics of the first side film and the second side film. Therefore, neither the first side film nor the second side film can be directly used for "electrostatic closure" with the bottom film. Therefore, the present application adds a pair of liners without anti-blocking agent between the side film and the bottom film, which can effectively enhance the electrostatic adsorption effect. Description of the Drawings

[0018] Figure 1 It is a schematic diagram when the air inlet position and the exhaust port position of the present utility model are misaligned.

[0019] Figure 2 It is a schematic diagram when the air inlet position and the exhaust port position of the present utility model are directly opposite.

[0020] Figure 3 It is a schematic diagram when the one-way exhaust passage of the present utility model has two exhaust ports.

[0021] Figure 4 It is an exploded structural schematic diagram of the present utility model.

[0022] Figure 5 It is a cross-sectional view when the first side film, the second side film, the pair of liners and the bottom film of the present utility model are disassembled.

[0023] In the figure: 10, three-dimensional bag body; 11, fastening structure; 20, first side film; 30, second side film; 40, bottom film; 41, bottom film A; 42, bottom film B; 50, pair of liners; 51, liner A; 52, liner B; 53, lower sealing strip; 531, lower sealing strip A; 532, lower sealing strip B; 54, one-way exhaust passage; 541, air inlet; 542, first exhaust port; 543, second exhaust port; 544, guiding strip. Detailed Embodiment

[0024] The present utility model will be further described below with reference to the accompanying drawings.

[0025] As Figures 1-5 shown, a vacuum compression bag includes a three-dimensional bag body 10. The upper end of the three-dimensional bag body 10 is provided with an opening and a fastening structure 11 for sealing the opening. The fastening structure 11 is a prior art and will not be described in detail in the present application.

[0026] The three-dimensional bag body 10 includes a first side film 20 and a second side film 30 formed on both sides of the bag body, and a bottom film 40 formed at the bottom of the three-dimensional bag body 10. The thickness of the bottom film 40 is between 0.04 mm and 0.10 mm. The bottom film 40 is folded along its center to form a bottom film A 41 and a bottom film B 42. A lining pair 50 is provided between the first side film 20 and the bottom film A 41 or / and between the second side film 30 and the bottom film B 42. That is to say, a lining pair 50 is provided between the first side film 20 and the bottom film A 41, or a lining pair 50 is provided between the second side film 30 and the bottom film B 42, or lining pairs 50 are provided between the first side film 20 and the bottom film A 41 and between the second side film 30 and the bottom film B 42. The lining pair 50 includes a lining A 51 and a lining B 52. The lining A 51 is heat-sealed with the side film, where the side film refers to the first side film 20 or / and the second side film 30, and the lining B 52 is heat-sealed with the bottom film 40.

[0027] A lower sealing strip 53 is heat-sealed between the lining A 51 and the lining B 52. A one-way exhaust channel 54 is provided between the lining A 51 and the lining B 52. In the present utility model, the number of one-way exhaust channels 54 can be single or more than two. When there are two, they can be both arranged on both sides of the first side film 20 and the bottom film A 41, or both arranged on both sides of the second side film 30 and the bottom film B 42, or one is arranged on one side of the first side film 20 and the bottom film A 41, and the other is arranged on one side of the second side film 30 and the bottom film B 42. The one-way exhaust channel 54 is arranged at the lower part or near the lower part of the three-dimensional bag body 10. The air in the three-dimensional bag body 10 is discharged to the outside through the one-way exhaust channel 54, and the one-way exhaust channel 54 blocks the air from flowing back through the electrostatic adsorption effect between the lining A 51 and the lining B 52.

[0028] The heat-sealing steps of the lining pair 50 with the corresponding side film and the bottom film 40 can be the following two methods: 1. First, the lining A 51 and the side film, and the lining B 52 and the bottom film 40 are heat-sealed correspondingly, and then the lining A 51 and the lining B 52 are heat-sealed to form a lower sealing strip 53; 2. The bottom film 40, the lining B 52, the lining A 51 and the corresponding side film are heat-sealed synchronously to form a lower sealing strip 53. In this method, the lining A 51 and the lining B 52 at the air inlet 541 position of the one-way exhaust channel 54 are separated, and the bottom film 40, the lining B 52, the lining A 51 and the corresponding side film at the air outlet position of the one-way exhaust channel 54 are completely separated.

[0029] In the vacuum compression bag of the present utility model, the structure of arranging the one-way exhaust channel 54 at the bottom of the three-dimensional bag body 10 can quickly discharge the air gathered in the three-dimensional bag body 10 without an exhaust valve, thereby effectively reducing the production cost of the vacuum compression bag.

[0030] For the vacuum compression bag of the present utility model, a lining pair 50 is added between the side film and the bottom film 40. The electrostatic adsorption between lining A 51 and lining B 52 is utilized to block the air backflow. Specifically, in order to make the overall product soft and non-adhesive, an opening agent, such as talcum powder, needs to be added to the plastics of the first side film 20 and the second side film 30. Therefore, neither the first side film 20 nor the second side film 30 can be directly used for "electrostatic closure" with the bottom film 40. Thus, in this application, a lining pair 50 without an opening agent is added between the side film and the bottom film 40, which can effectively enhance the electrostatic adsorption effect.

[0031] In some embodiments, the one-way exhaust channel 54 has an air inlet 541 and an exhaust port. The air inlet 541 is connected to the inside of the three-dimensional bag body 10, and the exhaust port is connected to the outside. The position of the air inlet 541 and the position of the exhaust port are arranged opposite or offset. When the position of the air inlet 541 and the position of the exhaust port are arranged opposite, the distance between the air inlet 541 and the exhaust port is greater than or equal to 3 cm. The purpose of arranging the position of the air inlet 541 and the position of the exhaust port opposite is to be able to discharge the air in the three-dimensional bag body 10 more smoothly, and the purpose of setting the distance between the air inlet 541 and the exhaust port to be greater than or equal to 3 cm is to effectively ensure the sealing performance and prevent air from flowing back into the three-dimensional bag body 10 through the one-way exhaust channel 54.

[0032] In some embodiments, there are two exhaust ports, including a first exhaust port 542 and a second exhaust port 543 arranged horizontally at intervals. The first exhaust port 542 is offset from the air inlet 541, and the second exhaust port 543 is arranged opposite to the air inlet 541. By setting two exhaust ports, when compressing the three-dimensional bag body 10, the air in the three-dimensional bag body 10 can be discharged more quickly and efficiently, thus making the user experience better.

[0033] In some embodiments, the lower sealing strip 53 includes a lower sealing strip A 531 and a lower sealing strip B 532 arranged at the lower part or near the lower part of the lining pair 50. The lower sealing strip A 531 and the lower sealing strip B 532 are arranged offset to form a one-way exhaust channel 54.

[0034] In some embodiments, the lower sealing strip A 531 extends in a Z shape from the center of the three-dimensional bag body 10 to both sides of the three-dimensional bag body 10. One end of the lower sealing strip A 531 extends towards the side end of the three-dimensional bag body 10 and is connected to the side sealing strip of the three-dimensional bag body 10. The other end of the lower sealing strip A 531 extends towards the side sealing strip on the other side of the three-dimensional bag body 10 and leaves a gap space A with the side sealing strip on this side. This gap space A constitutes the air inlet 541 of the one-way exhaust channel 54, and the width of the air inlet 541 is between 30 mm and 70 mm.

[0035] In some embodiments, the lower sealing strip A531 at least includes an upper section, a lower section, and an inclined section connecting the upper section and the lower section. The lower sealing strip B532 is disposed at the lower end of the upper section. A gap space B is left between the lower sealing strip B532 and the lower section of the lower sealing strip A531. The gap space B forms a first exhaust port 542 of the one-way exhaust passage 54, and the width of the first exhaust port 542 is between 30 mm and 70 mm.

[0036] In some embodiments, a gap space C is left between the other side of the lower sealing strip B532 relative to the first exhaust port 542 and the side sealing strip of the three-dimensional bag body 10. The gap space C forms a second exhaust port 543 of the one-way exhaust passage 54. By adding the second exhaust port 543, the exhaust efficiency of the one-way exhaust passage 54 can be improved, and the width of the second exhaust port 543 is between 30 mm and 70 mm.

[0037] In some embodiments, a guiding strip 544 is formed by heat-sealing the first side film 20 and the second side film 30. The guiding strip 544 is inclined from the side end to the center from top to bottom. Specifically, two sets of the guiding strips 544 are symmetrically disposed and are disposed at the side ends of the three-dimensional bag body 10. The inclination of the guiding strip 544 is between 30° and 60°. By providing the guiding strip 544, when the three-dimensional bag body 10 is compressed, the air in the three-dimensional bag body 10 can be quickly discharged to the bottom of the three-dimensional bag body 10 through the guiding strip 544.

[0038] In some embodiments, the bottom film 40 is a double-layer composite material. The first side of the bottom film 40 is PE, and the other side of the bottom film 40 is PET or nylon. The first side of the bottom film 40 is used for heat-sealing connection with the first side film 20 and the second side film 30.

[0039] In some embodiments, the materials of the inner liner A51 and the inner liner B52 are PE, and the thicknesses of the inner liner A51 and the inner liner B52 are both between 0.01 mm and 0.1 mm.

[0040] In some embodiments, the heights of the inner liner A51 and the inner liner B52 are between 30 mm and 70 mm.

[0041] In some embodiments, both sides of one end of the first side film 20 relative to the bottom film A41 are heat-sealed corresponding to both sides of the bottom film A41 to form the lower section of the side sealing strip. Similarly, both sides of one end of the second side film 30 relative to the bottom film B42 are heat-sealed corresponding to both sides of the bottom film B42 to form the lower section of the side sealing strip. Both sides of the other end of the first side film 20 relative to the bottom film A41 are heat-sealed corresponding to the other end of the second side film 30 relative to the bottom film B42 to form the upper section of the side sealing strip. Specifically, the heat-sealing height between the bottom film A41 and the first side film 20 and between the bottom film B42 and the second side film 30 is between 100 mm and 250 mm. Both the first side film 20 and the second side film 30 are double-layer composite materials. The inner side of the first side film 20 and the second side film 30 is a PE layer, and the outer side of the first side film 20 and the second side film 30 is a nylon layer or a PET layer or an OPP layer.

[0042] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features, and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A vacuum compression bag, comprising a three-dimensional bag body (10), wherein the upper end of the three-dimensional bag body (10) is provided with an opening and a buckle structure (11) for sealing the opening, the three-dimensional bag body (10) comprises a first side film (20) and a second side film (30) formed on both sides of the bag body and a bottom film (40) formed at the bottom of the three-dimensional bag body (10), characterized in that: The bottom film (40) is folded along its center to form a bottom film A (41) and a bottom film B (42). An inner liner pair (50) is provided between the first side film (20) and the bottom film A (41) or / and between the second side film (30) and the bottom film B (42). The inner liner pair (50) includes an inner liner A (51) and an inner liner B (52). The inner liner A (51) is heat-sealed with the side film, the inner liner B (52) is heat-sealed with the bottom film (40), and the inner liner A (51) and the inner liner B (52) are heat-sealed. ) are heat-sealed with a lower sealing strip (53), a one-way exhaust passage (54) is provided between the liner A (51) and the liner B (52), the one-way exhaust passage (54) is arranged at or near the lower part of the three-dimensional bag body (10), the air in the three-dimensional bag body (10) is discharged to the outside through the one-way exhaust passage (54), and the one-way exhaust passage (54) blocks the air backflow through the electrostatic adsorption effect of the liner A (51) and the liner B (52).

2. A vacuum compression bag according to claim 1, characterized in that: The one-way exhaust channel (54) comprises an air inlet (541) and an exhaust port, the air inlet (541) is connected to the interior of the three-dimensional bag body (10), and the exhaust port is connected to the outside, the position of the air inlet (541) and the position of the exhaust port are arranged opposite or offset, and when the position of the air inlet (541) and the position of the exhaust port are arranged opposite, the distance between the air inlet (541) and the exhaust port is greater than or equal to 3 cm.

3. A vacuum compression bag according to claim 2, characterized in that: The exhaust ports are provided with two, including a first exhaust port (542) and a second exhaust port (543) which are arranged in a transverse interval, the first exhaust port (542) and the air inlet (541) are arranged in a staggered manner, and the second exhaust port (543) and the air inlet (541) are arranged opposite to each other.

4. A vacuum compression bag according to claim 3, characterized in that: The lower sealing strip (53) comprises a lower sealing strip A (531) and a lower sealing strip B (532) which are arranged at the lower part or close to the lower part of the liner pair (50); the lower sealing strip A (531) and the lower sealing strip B (532) are staggered to form a one-way exhaust channel (54).

5. A vacuum compression bag according to claim 4, characterized in that: The lower sealing strip A (531) extends in a Z shape from the center of the three-dimensional bag body (10) to both sides of the three-dimensional bag body (10); one end of the lower sealing strip A (531) extends to the side end of the three-dimensional bag body (10) and is connected to the side sealing strip of the three-dimensional bag body (10); the other end of the lower sealing strip A (531) extends to the side sealing strip on the other side of the three-dimensional bag body (10) and leaves a gap space A with the side sealing strip on the other side, and the gap space A constitutes an air inlet (541) of the one-way exhaust channel (54).

6. A vacuum compression bag according to claim 1, characterized in that: The first side film (20) and the second side film (30) are heat-sealed to form a guide strip (544), and the guide strip (544) is arranged to be inclined from top to bottom from the side end to the center.

7. A vacuum compression bag according to claim 1, characterized in that: The bottom film (40) is a double-layer composite material, the first side of the bottom film (40) is PE, and the other side of the bottom film (40) is PET or nylon. The first side of the bottom film (40) is used for heat-sealing connection with the first side film (20) and the second side film (30).

8. A vacuum compression bag according to any one of claims 1 to 7, characterized in that: The material of the liner A (51) and the liner B (52) is PE.

9. A vacuum compression bag according to claim 8, characterized in that: The height of the liner A (51) and the liner B (52) is between 30 mm and 70 mm.

10. A vacuum compression bag according to claim 8, characterized in that: The two sides of one end of the first side film (20) relative to the bottom film A (41) are heat-sealed with the two sides of the bottom film A (41), the two sides of one end of the second side film (30) relative to the bottom film B (42) are heat-sealed with the two sides of the bottom film B (42), and the two sides of the other end of the first side film (20) relative to the bottom film A (41) are heat-sealed with the other end of the second side film (30) relative to the bottom film B.

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