CN217397252U - Inflatable vacuum packaging bag - Google Patents

Abstract

The utility model relates to an inflatable vacuum packaging bag, including first bag body, first sealing strip, inflatable seal valve and the seal valve of bleeding. The beneficial effects of the utility model reside in that, inflatable vacuum packaging bag both can use as the gas cell, also can use as valve bag, can also use as vacuum freshness protection package to can be repeated the evacuation sealed, can extensively use in daily life.

Description

Inflatable vacuum packaging bag

Technical Field

The utility model relates to a sack technical field especially relates to an inflatable vacuum packaging bag.

Background

The bag is an article widely used in daily life. The bags are various in types and different in functions, and the air inflation bag is one of the bags. The inflatable bag has the functions of protection and filling, but the existing inflatable bag has single function and limited use scenes, is only widely used in the logistics industry and is rarely used in daily life.

Disclosure of Invention

The utility model provides a problem to prior art exists, the utility model provides an inflatable vacuum packaging bag both can use as the gas cell, also can use as the valve bag, can also use as the vacuum freshness protection package to can repeat the evacuation sealed.

The utility model adopts the technical proposal that: an inflatable vacuum packaging bag comprising: the first bag body is formed by connecting a first outer bag, an inner bag and a second outer bag, the first outer bag, the inner bag and the second outer bag are formed by a first flexible membrane, a second flexible membrane, a third flexible membrane and a fourth flexible membrane, the inner bag is positioned between the first outer bag and the second outer bag, the inner bag is provided with a first bag opening, and the interiors of the first outer bag and the second outer bag are mutually communicated and form a sealing body together; the first sealing strip is arranged at a first bag opening of the inner bag and consists of a first concave buckle and a first convex buckle; the first outer bag or/and the second outer bag is/are provided with an inflatable sealing valve which is used for inflating and keeping sealed the first outer bag or/and the second outer bag; and the air exhaust sealing valve is arranged on the inner bag and used for exhausting air to the inner bag and keeping sealing.

In addition, the air exhaust sealing valve comprises a film type air exhaust sealing valve which is a second bag body, the second bag body is composed of a fifth flexible membrane, the second bag body is provided with a second bag opening and a third bag opening, and the second bag opening is connected with the inner bag in a sealing mode and communicated with the inside of the inner bag;

in addition, the second bag body is provided with a second sealing strip, and the second sealing strip is composed of a second concave buckle and a second convex buckle;

in addition, the inner surfaces of the inner bag or/and the second bag body are provided with salient points;

in addition, the diameter of a third bag opening of the second bag body is smaller than that of the first bag opening;

in addition, the third bag mouth diameter of the second bag body is smaller than the second bag mouth diameter;

further, the aforementioned pneumatic sealing valve includes a film-type pneumatic sealing valve;

in addition, the inner bag is provided with a film type inflation seal valve.

The beneficial effects of the utility model reside in that, inflatable vacuum packaging bag both can use as the gas cell, also can use as valve bag, can also use as vacuum freshness protection package to can be repeated the evacuation sealed, can extensively use in daily life.

The beneficial effects of the utility model are that there is better embodiment in following embodiment.

Drawings

FIG. 1 is a schematic view showing the construction of an inflatable vacuum freshness protection package in embodiment 1;

FIG. 2 is an exploded view of the inflatable vacuum freshness protection package of FIG. 1;

FIG. 3 is one of the cross-sectional views of the inflatable vacuum freshness protection package of FIG. 1;

fig. 4 is one of the structural schematic views of the film-type pneumatic sealing valve in embodiment 1;

figure 5 is an exploded view of the diaphragm-type pneumatic seal valve of figure 4;

FIG. 6 is a schematic view of the structure of the thin film of example 1;

FIG. 7 is a second cross-sectional view of the inflatable vacuum freshness protection package of FIG. 1;

FIG. 8 is a schematic view showing the structure of a round tube in example 1;

figure 9 is one of the cross sectional views of the suction sealed valve of embodiment 1;

FIG. 10 is a schematic view showing the structure of the suction seal valve attaching cover in embodiment 1;

figure 11 is a second cross-sectional view of the suction sealed valve of example 1;

FIG. 12 is a cross-sectional view of the mounting bracket of FIG. 11;

FIG. 13 is a schematic structural view of an inflatable vacuum freshness protection package with the second bag body as the evacuation sealing valve in the embodiment 1;

FIG. 14 is an exploded view of the inflatable vacuum freshness protection package and the second bag body of FIG. 13;

FIG. 15 is a schematic view of the inflatable vacuum freshness protection package with the second body as the evacuation sealing valve in the embodiment 1, which is vacuumized by the small vacuum packaging machine and sealed by the sealing clip;

FIG. 16 is a schematic view of the second receptacle of FIG. 15 being sealed by a closure clip;

FIG. 17 is a schematic structural view of an inflatable vacuum freshness protection package in which a second package body is provided with a second sealing strip in embodiment 1;

FIG. 18 is a schematic view of the second pouch of FIG. 7 with a second sealing strip;

FIG. 19 is a schematic view showing the use of the inflatable vacuum freshness protection package in which the second bag body is provided with the second sealing strip in example 1, which is vacuumized and sealed by the small vacuum packaging machine;

FIG. 20 is one of the structural diagrams of the second bag body of embodiment 2, in which the third bag opening diameter is smaller than the second bag opening diameter;

FIG. 21 is a second schematic view showing the structure of the second pouch in example 2, wherein the third pouch opening diameter is smaller than the second pouch opening diameter;

FIG. 22 is a schematic view showing a structure in which bumps are formed on the inner surfaces of the inner bag and/or the second bag body in example 3;

FIG. 23 is a second schematic view showing the inner surfaces of the inner bag and/or the second bag body of example 3 provided with protrusions;

FIG. 24 is a schematic view showing the use of the small vacuum packaging machine for vacuuming the inflatable vacuum freshness protection package in which the inner surfaces of the inner bag or/and the second bag body are/is provided with the protrusions in example 3;

fig. 25 is a schematic structural view of an inflatable seal valve of the film type having an inner bag provided in embodiment 4.

Detailed Description

The following detailed description of embodiments of the present invention refers to the accompanying drawings.

It should be noted that in the following embodiments, the inflatable vacuum packaging bag of the present invention is indicated by reference numeral 100 in the drawings.

Example 1

As shown in fig. 1, 2 and 3, the inflatable vacuum bag 100 comprises a first bag body 1, the first bag body 1 is formed by connecting a first outer bag 6, an inner bag 7 and a second outer bag 8, and the first outer bag 6, the inner bag 7 and the second outer bag 8 are formed by a first flexible membrane 2, a second flexible membrane 3, a third flexible membrane 4 and a fourth flexible membrane 5. The first flexible membrane 2, the second flexible membrane 3, the third flexible membrane 4 and the fourth flexible membrane 5 are made of plastics.

The left and right edges of the first flexible membrane 2, the second flexible membrane 3, the third flexible membrane 4 and the fourth flexible membrane 5 are combined through heat sealing to form two first heat sealing edges 22. The upper ends of the first flexible membrane 2 and the second flexible membrane 3 are combined by heat sealing and form a second heat sealing edge 23. The lower ends of the second flexible film 3 and the third flexible film 4 are joined by heat sealing and form a third heat seal edge 24. The upper ends of the third flexible film 4 and the fourth flexible film 5 are joined by heat sealing and form a fourth heat seal 25. The lower end edges of the first flexible film sheet 2, the second flexible film sheet 3, the third flexible film sheet 4 and the fourth flexible film sheet 5 are bonded by heat sealing and form a fifth heat seal 26. The first flexible film 2 and the second flexible film 3 form a first outer bag 6 through a left first heat seal edge 22, a right first heat seal edge 23 and a fifth heat seal edge 26. The second flexible membrane 3 and the third flexible membrane 4 form an inner bag 7 through a left first heat seal edge 22 and a right first heat seal edge 24. The third flexible membrane 4 and the fourth flexible membrane 5 form a second outer bag 8 through two left and right first heat seal edges 22, a fourth heat seal edge 25, and a fifth heat seal edge 26. The inner bag 7 is positioned between the first outer bag 6 and the second outer bag 8, and the upper end of the inner bag 7 is provided with a first bag opening 9. A communication port 27 is formed between the third heat seal edge 24 and the fifth heat seal edge 26, so that the interiors of the first outer bag 6 and the second outer bag 8 are communicated with each other to form a sealing body. In the present embodiment, the communication port 27 is a slit. The first outer bag 6 or the second outer bag 8 is inflated, and the first outer bag 6 and the second outer bag 8 are expanded and maintain a sealed state.

The inflatable vacuum bag 100 comprises a first sealing strip 10, a first bag opening 9 of the inner bag 7 is provided with the first sealing strip 10, the first sealing strip 10 is composed of a strip-shaped first concave buckle 11 and a first convex buckle 12, which are arranged on the inner walls of the two sides of the first bag opening 9, and after the first concave buckle 11 and the first convex buckle 12 are buckled with each other, the first bag opening 9 is sealed.

The inflatable vacuum bag 100 comprises an inflatable sealing valve, the first outer bag 6 or/and the second outer bag 8 being provided with an inflatable sealing valve for inflating and keeping sealed the first outer bag 6 or/and the second outer bag 8. The air-seal valve is widely used in the existing products and has various structures, so that the existing common air-seal valves, such as air valves for air-seal of bicycles and motorcycles, can be adopted. Moreover, the conventional pneumatic sealing valve is basically a hard pneumatic sealing valve. The air-sealing valve comprises a film-type air-sealing valve 21, and in this embodiment, as shown in fig. 2, 3, 4 and 5, the film-type air-sealing valve 21 is formed by heat-sealing two sides of two films 28 with a certain length, and the film-type air-sealing valve 21 has two sixth heat-sealing edges 29 at two sides and an air passage 30 formed in the middle, so that air can flow through the air passage 30. One end of the film-type inflatable sealing valve 21 is hermetically connected with the first outer bag 6 through a second heat seal edge 23, and an inflation inlet 31 is formed at the intersection of the air passage 30 and the second heat seal edge 23. The other part of the film-type air sealing valve 21 protrudes into the interior of the first outer bag 6. The surface of at least one film 28 at one end of the film-type air seal valve 21 is printed with heat-resistant ink 32, and the heat-resistant ink 32 can prevent the two films 28 of the air channel 30 and the air charging port 31 at one end of the film-type air seal valve 21 from being adhered, so that the air channel 30 and the air charging port 31 intersecting with the second heat seal edge 23 cannot be closed. An inflation tool such as an inflator or an air pump can inflate the inflation port 31 of the film-type inflatable sealing valve 21, the air enters the first outer bag 6 through the air passage 30, the air inside the first outer bag 6 presses the surfaces of the two films 28 of the film-type inflatable sealing valve 21 to close the air passage 30 and maintain the sealed state, and the air inside the first outer bag 6 cannot enter the air passage 30 and escape. The film-type air-sealing valve 21 of the present structure is widely used in the existing air bags.

In other embodiments, the thin film type pneumatic sealing valve 21 may also take other configurations. As shown in fig. 2, 6 and 7, the film-type pneumatic sealing valve 21 is formed by heat-sealing a strip of film 28 having a certain length with the second flexible membrane 3, that is, the second flexible membrane 3 constitutes a part of the film-type pneumatic sealing valve 21. The membrane 28 has two side edges 33 on each side. The film 28 is attached at one end to the first outer bag 6 by a second heat seal 23. Extending from the junction to the interior of the first outer bag 6, two side edges 33 of one side of the film 28 are heat sealed with the second flexible film 3 to form two sixth heat seal edges 29, thereby forming the film type inflatable seal valve 21, and a gas duct 30 is formed in the middle, through which gas can flow, and an inflation inlet 31 is formed at the intersection of the gas duct 30 and the second heat seal edge 23. The other side of one end of the film 28 is heat sealed to the second heat seal edge 23. The surface of one side of one end of the film 28 is printed with heat-resistant ink 32, and the heat-resistant ink 32 can prevent the air channel 30 and the air charging port 31 at one end of the film 28 from being adhered to the second flexible film 3, so that the air channel 30 and the air charging port 31 intersected with the second heat seal edge 23 cannot be closed. An inflation tool such as an inflator or an air pump can inflate the inflation port 31 of the film-type inflation seal valve 21, air enters the first outer bag 6 through the air passage 30, the air inside the first outer bag 6 presses the surface of the film 28 to close the air passage 30 and maintain the sealed state, and the air inside the first outer bag 6 cannot enter the air passage 30 to escape. The film-type air-sealing valve 21 of the present structure is widely used in the existing air bags.

The inflation and deflation of the first outer bag 6 or/and the second outer bag 8 is described. As shown in fig. 3 and 7, an article 34 is put into the inner bag 7 through the first bag opening 9, an inflation tool such as an inflator or an air pump inflates the inflation opening 31 of the film-type inflation sealing valve 21, the first outer bag 6 begins to expand, the inner bag 7 is pressed by the first outer bag 6 and the second outer bag 8 to exhaust the gas inside because the communication opening 27 is arranged between the third thermal sealing edge 24 and the fifth thermal sealing edge 26, the first outer bag 6 and the second outer bag 8 are communicated with each other, the second outer bag 8 is also inflated and expanded, the inner bag 3 and the third flexible membrane 4 tightly adhere to the article 34, and the expanded first outer bag 6 and the second outer bag 8 protect the article 34 from being damaged by collision or extrusion. If the air is to be discharged, a hollow round tube 35 is inserted into the air inlet 31 of the film-type air-sealing valve 21 and extends through the entire air passage 30 and into the first outer bag 6, and the air in the first outer bag 6 and the second outer bag 8 can be discharged through the hollow round tube 35. The first and second outer bags 6 and 8 can be repeatedly inflated for use. The structure of the round tube 35 is shown in fig. 8. The lower end of the hollow circular tube 35 is conical so that the circular tube 35 is inserted into the charging port 31 without damaging any part of the film type pneumatic seal valve 21.

The inflatable vacuum bag 100 comprises a suction seal valve 13, the inner bag 7 is provided with the suction seal valve 13, and the suction seal valve 13 is used for inflating and keeping the inner bag 7 sealed. The suction seal valve 13 has various configurations. In this embodiment, as shown in fig. 2 and 9, the bled-off sealing valve 13 comprises a first housing 400, a valve needle 401, a first valve plug 402 and a second valve plug 403. The first housing 400 is a hollow plastic tube. The first housing 400 has a first air inlet 404 at one end and a first air outlet 405 at the other end. One end of the first shell 400 is hermetically connected with the inner bag 7 through the first heat seal edge 22 and is communicated with the inside of the inner bag 7. The other end of the first housing 400 may be externally connected to an air suction tool. The inner wall of the first housing 400 is provided with a first valve plug 402 and a second valve plug 403 which are annular, and the first valve plug 402 and the second valve plug 403 are made of flexible materials such as rubber or silica gel. An air inlet 406 which penetrates up and down is formed between the first valve plug 402 and the second valve plug 403, and air in the inner bag 7 can pass through the air inlet 406 during air suction. The valve needle 401 is confined in the space between the first valve plug 402 and the second valve plug 403, and the second valve plug 403 can block the valve needle 401 from being disengaged from the first air outlet 405 during air suction. The second valve plug 403 has a plurality of protrusions 407 at the bottom thereof, and a gap is formed between the plurality of protrusions 407 to allow air to flow therethrough. The opening 408 of the inlet channel 406 at the upper end of the first plug 402 is conical, and the bottom of the valve needle 401 is also conical, just fitting with the conical opening 408 to form a seal. When the other end of the first housing 400 is connected to an external suction tool for suction, the valve needle 401 will be lifted upwards away from the conical opening 408 and contact the protruding point 407 under the action of air pressure. The air inside the inner bag 7 enters the air inlet channel 406 and is discharged out of the first air outlet 405. The air-extracting tool continues to extract air until the air inside the inner bag 7 is completely extracted and can not be extracted. When the air suction tool stops air suction, the valve needle 401 lifted upwards naturally falls back downwards, and the conical bottom of the valve needle 401 is attached to the conical opening 408 and keeps a sealing state under the action of external atmospheric pressure. In other embodiments, as shown in fig. 10, the other end of the suction-sealing valve 13 is connected to the cover 43, and the sealing performance of the suction-sealing valve 13 is better. In order to prevent the food contained in the inner bag 7 from entering the air inlet 406 and affecting the performance of the pumping and sealing valve 13, a first isolation layer 409 is disposed on the inner wall of the first housing 400 below the first valve plug 402 in the direction of the first air inlet 404, and a first through hole 410 is disposed on the surface of the first isolation layer 409. The first isolation layer 409 can block the food contained in the inner bag 7 from entering the air inlet passage 406, but does not affect the air circulation.

The suction sealing valve 13 can also adopt other structures. As shown in fig. 2, 11 and 12. The suction sealing valve 13 comprises a second housing 500, a flexible valve plate 501 and a fixed bracket 502. The flexible valve sheet 501 is connected with a plug 503. The second housing 500 is a hollow ring. The second housing 500 has a second inlet 504 at one end and a second outlet 505 at the other end. One end of the second shell 500 is hermetically connected with the inner bag 7 through the first heat seal edge 22 and is communicated with the inside of the inner bag 7. The other end of the second housing 500 may be externally connected with a suction tool. Flexible valve sheet 501 is fixed to fixing bracket 502 by plug 503. The inner wall of the second shell 500 is provided with a fixed support 502, the fixed support 502 comprises a large ring 506, a small ring 507 and connecting rods 508, the large ring 506 is integrally connected with the inner wall of the second shell 500, the small ring 507 is consistent with the central point of the large ring 506, the small ring 507 is connected with the large ring 506 through at least two connecting rods 508, a third through hole 509 is formed between the two connecting rods 508 and allows air to flow up and down, and a fourth through hole 510 is formed in the middle of the small ring 507. The flexible valve plate 501 is circular, is made of flexible materials such as rubber or silica gel and the like, and is attached to the upper end face of the large ring 506 to form sealing. The lower end of the flexible valve plate 501 is connected with a plug 503, and the plug 503 is plugged into a fourth through hole 510 in the middle of the small ring 507 to fix the flexible valve plate 501 on the fixing bracket 502. When the other end of the second housing 500 is externally connected with an air suction tool for air suction, the edge portion of the flexible valve sheet 501 is separated from the upper end of the large ring 506 and is turned upwards under the action of air pressure. The air inside the inner bag 7 is discharged out of the second air outlet 505 through the third through-hole 509 of the fixing bracket 502. The air-extracting tool continues to extract air until the air inside the inner bag 7 is completely extracted and can not be extracted. When the air extracting tool stops extracting air, the edge part of the flexible valve plate 501 which is turned up naturally falls back downwards to be attached to the upper end face of the large ring 506 and keeps a sealing state under the action of external atmospheric pressure. In order to prevent the food in the inner bag 7 from entering the fixed bracket 502 through the third through hole 509 between the two connecting rods 508 and affecting the performance of the air-extracting sealing valve 13, a second isolation layer 511 is connected to the inner wall of the second housing 500 below the fixed bracket 502 in the direction of the second air inlet 504, and a second through hole 512 is formed in the surface of the second isolation layer 511. The second isolation layer 511 can prevent the food contained in the inner bag 7 from entering the fixing bracket 502 through the third through hole 509, but does not affect the air circulation.

The air-extracting and sealing valve comprises a film-type air-extracting and sealing valve, as shown in fig. 13 and 14, the film-type air-extracting and sealing valve is a second bag body 14, the second bag body 14 is formed by a fifth flexible film 44, the second bag body 14 is provided with a second bag opening 15 and a third bag opening 16, and the second bag opening 15 is connected with the inner bag 7 in a sealing manner and communicated with the inside of the inner bag 7. The second bag body 14 functions to evacuate and seal the inner bag 7. As shown in fig. 15 and 16, when the inner bag 7 of the inflatable vacuum bag 100 provided with the second bag body 14 is filled with food such as vegetables, fruits, meat and the like and the first bag opening 9 is sealed by the first sealing strip 10, the small vacuum packaging machine 36 is used for vacuuming, the air nozzle 37 of the small vacuum packaging machine 36 can be inserted into the second bag body 14 to vacuumize the inner bag 7, and after the vacuuming is completed, the strong sealing clamp 38 can be used for clamping on the second bag body 14 for sealing. The strong sealing clip 38 is a variety of structures known in the art. In this embodiment, the strong sealing clip 38 includes a lower clip strip 39 and an upper clip strip 40, and the second pouch 14 is sealed after the lower clip strip 39 and the upper clip strip 40 are fastened by both ends.

The second pouch 14 may be sealed in other ways. As shown in fig. 17 and 18, the second bag 14 is provided with a second sealing strip 17, the second sealing strip 17 is composed of a second concave button 18 and a second convex button 19, and the second sealing strip 17 and the first sealing strip 10 have the same structure. After the second female buckle 18 and the second male buckle 19 of the second sealing strip 17 are buckled with each other, the second bag body 14 is sealed. As shown in fig. 19, after the inner bag 7 of the inflatable vacuum bag 100 having the second sealing strip 17 on the second bag body 14 is filled with food such as vegetables, fruits, meat, etc. and the first bag opening 9 is sealed by the first sealing strip 10, the small vacuum packing machine 36 is used to vacuumize, and the air nozzle 37 of the small vacuum packing machine 36 can be inserted into the second bag body 14 to vacuumize the inner bag 7, and the second sealing strip 17 is exposed outside the small vacuum packing machine 36. After the vacuum pumping is finished, the second concave button 18 and the second convex button 19 of the second sealing strip 17 exposed outside the small vacuum packaging machine 36 are buckled with each other, the second bag body 14 is sealed, and at the moment, the inner bag 7 and the second bag body 14 are in a sealed state integrally. Since the diameter of the third pocket 16 of the second pocket 14 is smaller than the diameter of the first pocket 9, the diameter of the third pocket 16 can be relatively small, for example, between 1CM and 7CM, and correspondingly, the diameter of the second pocket 14 is between 1CM and 7 CM. Since the diameter of the second pouch body 14 can be relatively small, the operation of sealing the second pouch body 14 by the strong sealing clip 38 and the second sealing tape 17 is convenient and easy.

Because the first sealing strip 10 is arranged at the first bag opening 9 of the inner bag 7 and the second sealing strip 17 is arranged at the second bag body 14, the inflatable vacuum bag 100 can be used as a self-sealing bag at ordinary times. In addition, since the inner bag 7 can be vacuumized and sealed by the second bag body 14, the inflatable vacuum bag 100 can be used as a vacuum fresh-keeping bag at ordinary times and can be repeatedly vacuumized and sealed. Compared with the existing inflatable bag, the inflatable vacuum bag 100 can be widely used in daily life.

It should be appreciated that the evacuation sealing of the second bag 14 is not limited to the use of existing small vacuum packaging machines, and that other devices or tools, including machine equipment used in industrial production, may be used.

Example 2

As shown in fig. 20 and 21, the diameter of the third opening 16 of the second bag body 14 is smaller than that of the second opening 15, and when the fifth flexible film 44 has a certain thickness and hardness, the second bag body 14 itself can be used as an inlet and outlet for materials, such as liquid materials, powder materials, granular materials, and the like. This may increase the use scenarios or uses of the inflatable vacuum bag 100.

Example 3

As shown in fig. 22 and 23, the inner surface 41 of the inner bag 7 or/and the second bag body 14 is provided with the convex points 20, and gaps are formed between the convex points 20 to form air channels. As shown in fig. 24, after the inner bag 7 is filled with food and sealed by the first sealing tape 10, the small vacuum packaging machine 36 is used for vacuum-pumping, the small vacuum packaging machine 36 is provided with a vacuum chamber 42, the second bag body 14 is placed in the vacuum chamber 42 for vacuum-pumping, and the second sealing tape 17 is exposed outside the small vacuum packaging machine 36. The vacuum chamber 42 can extract the air in the inner bag 7 or/and the second bag body 14 through the gaps or air channels between the salient points 20 without dead angles, and the air extraction is relatively clean. After the evacuation is completed, the second concave button 18 and the second convex button 19 of the second sealing tape 14 exposed outside the small vacuum packaging machine 36 are fastened to each other, and the second bag body 14 is sealed, at this time, the inner bag 7 and the second bag body 14 are in a sealed state as a whole. If the second pouch 14 does not have the second sealing tape 17, the small vacuum packaging machine 36 can directly heat-seal the second pouch 14 after the evacuation is completed.

Example 4

In addition to the first outer bag 6 or/and the second outer bag 8 being provided with the film-type air-sealing valve 21, the inner bag 7 may also be provided with the film-type air-sealing valve 21, as shown in fig. 25. The method can be used for preserving all foods in a modified atmosphere manner because the foods such as bread, cakes and the like are not suitable for being vacuumized and are easily crushed or extruded if being vacuumized. The inner bag 7 is provided with the film type inflatable sealing valve 21, so that modified atmosphere fresh-keeping gas such as nitrogen, oxygen, carbon dioxide, ethylene and the like can be filled into the inner bag 7 through the inflation inlet 31 for fresh keeping, and at the moment, the inner bag 7 is inflated and expanded, so that the foods such as bread, cakes and the like in the inner bag can be protected from being crushed or extruded. In addition, the inner cavity of the inner bag 7 and some foods can be sterilized by filling gas such as ozone if sterilization and disinfection are needed. The first sealing strip 10 and the second sealing strip 17 with excellent performance can keep good sealing performance after the inner bag 7 is inflated. The first sealing strip 10 and the second sealing strip 17 are opened and unsealed, and the gas filled in the inner bag 7 is naturally exhausted.

Claims (8)

1. An inflatable vacuum packaging bag, comprising:

the first bag body is formed by connecting a first outer bag, an inner bag and a second outer bag, the first outer bag, the inner bag and the second outer bag are formed by a first flexible membrane, a second flexible membrane, a third flexible membrane and a fourth flexible membrane,

the inner bag is positioned between the first outer bag and the second outer bag, a first bag opening is formed in the inner bag, and the interiors of the first outer bag and the second outer bag are communicated with each other and form a sealing body together;

the first sealing strip is arranged on the first bag opening of the inner bag and consists of a first concave buckle and a first convex buckle; and

the first outer bag or/and the second outer bag is/are provided with an inflatable sealing valve which is used for inflating and keeping the first outer bag or/and the second outer bag sealed; and

and the air exhaust sealing valve is arranged on the inner bag and used for exhausting air for the inner bag and keeping sealing.

2. The vacuum packaging bag according to claim 1, wherein the suction seal valve comprises a film-type suction seal valve, the film-type suction seal valve is a second bag body, the second bag body is composed of a fifth flexible film, the second bag body is provided with a second bag opening and a third bag opening, and the second bag opening is connected with the inner bag in a sealing manner and communicated with the inside of the inner bag.

3. The vacuum packing bag according to claim 2, wherein the second bag body is provided with a second sealing strip, and the second sealing strip is formed by a second concave button and a second convex button.

4. The vacuum packing bag according to claim 2 or 3, wherein the inner surface of the inner bag or/and the second bag body is provided with protrusions.

5. The vacuum packaging bag of claim 2 or 3, wherein the third mouth diameter of the second bag body is smaller than the first mouth diameter.

6. The vacuum packaging bag of claim 2 or 3, wherein the third mouth diameter of the second bag body is smaller than the second mouth diameter.

7. The vacuum packaging bag of claim 1, wherein the pneumatic sealing valve comprises a film-type pneumatic sealing valve.

8. The vacuum packing bag according to claim 1, wherein the inner bag is provided with a film type inflatable seal valve.

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