Plastic packaging bag with exhausting, sealing and moisture-proof functions

Abstract

The plastic packaging bag comprises a bag body with an object containing cavity, a bag opening is formed in the bag body, bag body sealing strips are located on membranes on the two sides of the bag opening respectively, an exhaust assembly is further arranged on the bag body, a one-way air valve A, a one-way air valve B and an air bag are arranged in the exhaust assembly, the one-way air valve A is connected with the object containing cavity, and the one-way air valve B is connected with the air bag. The one-way air valve B is connected with the air bag and outside air. The air bag is used for sucking air in the containing cavity in a one-way mode and discharging the air to the outside. According to the plastic packaging bag, the exhaust structure with the air bag and the moisture-proof and moisture-absorbing air inlet are arranged, after the bag opening is closed, internal air is actively exhausted and ventilated through the air bag, and the second cavity of the outer bag can expand to protect articles in the inner bag; the bag opening starch drying device can absorb moisture leaked in the sealed state, the internal damp speed is reduced, and the packaging bag is suitable for being used for various sealed and damp-proof packaged objects and food.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging bags, in particular to a plastic packaging bag with exhaust, sealing and moisture-proof properties. Background Art

[0002] Packaging bags are widely used in daily life and industrial production. Generally, food and other items need to be placed in packaging bags for storage. At the same time, the packaging bags are also required to have good sealing properties. The bag body is usually made of a film. The film is usually two pieces. The two pieces of the bag body are connected together and have a bag opening for putting items in. The inner side of the bag opening is provided with self-sealing strips that cooperate with each other to close the bag opening.

[0003] After packaging items, especially food, in existing packaging bags, some fragile items and foods need to be inflated. The inflated gas leaves a lot of air in the packaging bag, which also causes the items to be affected by sudden changes in temperature during transportation. The air inside the packaging bag is prone to condensation of moisture, affecting the dryness of the items, and the use of special gas is troublesome. Secondly, for some hygroscopic foods, such as melon seeds, peanuts and other foods with shells and skins, if they cannot be eaten in one go, ordinary food packaging bags cannot ensure that they will be sealed again after opening due to the difficulty in sealing. In addition, the entering gas will also cause moisture problems. Utility Model Content

[0004] In view of the existing technology, the purpose of the present invention is to provide a plastic packaging bag with a self-exhaust bag design. The packaging bag of this embodiment is also equipped with a dry air inlet and a second cavity. The usage options are diverse and can meet most usage needs, which is very convenient.

[0005] In order to achieve the above objectives, the technical solution adopted by the utility model is: a plastic packaging bag with exhaust, sealing and moisture-proof functions, comprising a bag body with a storage cavity, the bag body also having a bag opening, and a sealing strip being provided on the inner side of the diaphragm of the bag body relative to the bag opening, the sealing strips being respectively provided on the diaphragms on both sides of the bag opening and the sealing strips on both sides being provided opposite to each other, the bag body is also provided with an exhaust assembly, the exhaust assembly is provided with a one-way air valve A, a one-way air valve B and an airbag, the one-way air valve A being located on the air inlet side of the airbag and connected to the storage cavity, the one-way air valve B being located on the air outlet side of the airbag and connecting the airbag with the outside air, and the airbag is used to unidirectionally absorb the air in the storage cavity and discharge it to the outside.

[0006] As a further configuration of the above solution, a flexible spring sheet is provided in the airbag, and the flexible spring sheet is used to expand the airbag so as to absorb the air in the bag body into the airbag.

[0007] As a further arrangement of the above scheme, a moisture-proof air inlet is also provided on the bag body, and the moisture-proof air inlet includes a screw cover, an air port piece and a filter layer. The screw cover and the air port piece threadably seal the moisture-proof air inlet, and the filter layer is installed in the air port piece. A number of air holes are provided on the screw cover.

[0008] As a further configuration of the above solution, a second cavity is provided outside the storage cavity of the bag body, and the second cavity is provided with an air nozzle, which is used to inflate and deflate the second cavity.

[0009] As a further configuration of the above solution, two sealing strips are provided and are spaced apart and parallel to each other, and a starch desiccant layer is provided between the two sealing strips.

[0010] Beneficial effects: The plastic packaging bag of the utility model is provided with an exhaust structure with an air bag and an air inlet design with moisture-proof and moisture-absorbing properties, so that the air in the bag can be actively dried and ventilated. After the bag opening is closed, the internal air is discharged through the air bag. Based on the inflation demand, dry air can be filled to expand the bag cavity, or the inner bag can be compressed and the second cavity outside can be expanded to protect the items in the inner bag. Multiple schemes can be used to adapt to various packaging items. The starch drying setting between the double sealing strips of the bag opening can absorb the moisture entering when the sealing strip has a slight leak during long-term storage, slowing down the speed of internal moisture. It is suitable for use with a variety of sealed and moisture-proof packaged items and foods. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the packaging bag structure of the present utility model.

[0012] Figure 2 This is a cross-sectional schematic diagram of Example 1 of the present utility model.

[0013] Figure 3 This is a schematic diagram of the exhaust assembly of Example 1 of the present utility model.

[0014] Figure 4 This is a schematic diagram of the sealing strip of Example 1 of the utility model.

[0015] Figure 5 This is a schematic diagram of the air intake status of the moisture-proof air inlet in Example 1 of the present utility model.

[0016] Figure 6 Schematic diagram of the closed state of the moisture-proof air inlet of Example 1 of the utility model

[0017] Figure 7 This is a schematic cross-sectional view of the structure with a second cavity in Example 2 of the present utility model.

[0018] Figure numerals: 1. bag body; 2. storage cavity; 3. bag opening; 4. diaphragm; 5. sealing strip; 51. starch desiccant layer; 6. exhaust assembly; 61. one-way air valve A; 62. one-way air valve B; 63. air bag; 64. flexible spring; 7. moisture-proof air inlet; 71. screw cover; 72. air outlet; 73. filter layer; 75. air eye; 9. second cavity; 91. air nozzle. DETAILED DESCRIPTION

[0019] In order to more clearly understand the above-mentioned objectives, features and advantages 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] Example 1: Figure 1-6 The embodiment 1 shown is a plastic packaging bag with exhaust, sealing and moisture-proof properties, such as Figure 1-2 The packaging bag of this embodiment includes a bag body 1 with a storage cavity 2, and the bag body 1 is also provided with a bag opening 3 for putting in and taking out objects. The bag body 1 is provided with a sealing strip 5 on the inner side of the diaphragm 4 at the bag opening 3. The sealing strip 5 is respectively provided on the diaphragm 4 on both sides of the bag opening 3 and the sealing strips 5 on both sides are arranged opposite to each other. The sealing strip 5 is used to seal the bag opening 3, and the bag opening 3 can be closed after the items are put in or taken out, so as to seal and preserve the remaining items or the items put in. The bag body 1 is also provided with an exhaust component 6, and a one-way air valve A61, a one-way air valve B62 and an air bag 63 are provided in the exhaust component 6. The one-way air valve A61 is located on the air inlet side of the air bag 63 and is connected to the storage cavity 2. The one-way air valve B62 is located on the air outlet side of the air bag 63 and is connected to the air bag 63 and the outside air. The air bag 63 is used to unidirectionally absorb the air in the storage cavity 2 and discharge it to the outside. Figure 3 The exhaust assembly 6 of the embodiment shown in the figure has the following principle: after the bag opening 3 is closed based on the sealing strip 5, the airbag 63 is pressed, and the airbag 63 is discharged from the inside of the airbag 63 after being pressed by the external force. At this time, due to the high pressure inside the airbag 63 and the large amount of air inside the airbag 63, the active block 69 of the one-way air valve A61 is sealed by the air pressure on the air inlet side of the airbag 63, while the active block 69 of the one-way air valve B62 on the other side is as shown in FIG. Figure 3The outward movement shown causes the air passage 68 to be released, and the air flow is ejected from the air passage 68. After the pressure is released, the airbag 63 recovers and its internal pressure is relatively small. The airbag 63 inhales air based on the change of the airflow. The movable block 69 of the one-way air valve B62 moves to the left under the influence of the airflow to close the air passage 68 of the one-way air valve B62, while the air passage 68 of the one-way air valve A61 on the other side is opened. The expanded airbag 63 draws air from the receiving chamber 2. After reciprocating pressing, the air in the receiving chamber 2 is discharged to the outside, thereby realizing the vacuum preservation of the items in the bag body 1.

[0021] As a further arrangement of the above scheme, a flexible spring piece 64 is provided in the airbag 63. The flexible spring piece 64 is in a hollow spherical structure. It deforms when pressed by an external force, and restores to a spherical shape based on the elasticity of its own material after the external force is lost, thereby expanding the airbag 63 to expand the inner cavity, thereby forming the principle of sucking the air in the bag body 1 into the airbag 63.

[0022] As a further configuration of the above solution, for some items that need to be expanded for storage, such as potato chips, which are easily damaged by vacuum compression, this embodiment also adds the following Figure 5-6 The structure of the moisture-proof air inlet 7 is designed, and the bag body 1 is further provided with a moisture-proof air inlet 7, the moisture-proof air inlet 7 includes a screw cover 71, an air port member 72 and a filter layer 73, the screw cover 71 and the air port member 72 are threadedly sealed to the moisture-proof air inlet 7, and the filter layer 73 is installed in the air port member 72, and the screw cover 71 is provided with a plurality of air holes 75, such as Figure 5 As shown, when needed, the screw cover 71 is rotated a certain number of times toward the external thread, so that the air eye 75 is misaligned with the air outlet piece 72. At this time, air will enter from the air eye 75, enter the air outlet piece 72, pass through the filter layer 73, and then enter the storage cavity 2. The moisture-proof and hygroscopic sheets set based on the filter layer 73 filter layer by layer, so that the humidity of the incoming air is reduced, the internal air humidity is reduced, and the problem of internal items being affected is reduced. At this time, repeatedly pressing the air bag 63 can replace the air in the bag body 1, so that the internal air can be kept as dry as possible.

[0023] like Figure 6 As shown, the moisture-proof air inlet 7 can be closed by rotating and tightening the screw cover 71, thereby controlling the amount of air in the storage cavity 2 and controlling whether the bag body 1 expands.

[0024] As a further configuration of the above scheme, two sealing strips 5 are provided and are distributed in parallel at intervals, and a starch desiccant layer 51 is provided between the two sealing strips 5. The purpose of this configuration is that when there is a slight leakage of the sealing strip 5 during long-term storage, the incoming air will be absorbed by the starch desiccant layer 51.

[0025] Example 2: As a further configuration of the above scheme, the bag body 1 of this embodiment 2 is further provided with a second cavity 9 outside the receiving cavity 2, and the second cavity 9 is provided with an air nozzle 91, and the air nozzle 91 is used to inflate and deflate the second cavity 9. Figure 7 As shown, its purpose is to evacuate the internal storage chamber 2 for some relatively fragile stored items, so as to prevent collisions between items and reduce wear. The setting of the second cavity 9 protects the outside of the storage chamber 2, cushions the collision of external objects, and improves the preservation of items in the storage chamber 2.

[0026] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A plastic packaging bag with exhaust, sealing and moisture-proof properties, comprising a bag body (1) with a receiving cavity (2), the bag body (1) also having a bag opening (3), characterized in that: The bag body (1) is provided with a sealing strip (5) on the inner side of the diaphragm (4) at the bag opening (3). The sealing strip (5) is respectively provided on the diaphragms (4) on both sides of the bag opening (3), and the sealing strips (5) on both sides are arranged opposite to each other. The bag body (1) is also provided with an exhaust assembly (6). The exhaust assembly (6) is provided with a one-way air valve A (61), a one-way air valve B (62) and an air bag (63). The one-way air valve A (61) is located on the air inlet side of the air bag (63) and is connected to the receiving chamber (2). The one-way air valve B (62) is located on the air outlet side of the air bag (63) and is connected to the outside air. The air bag (63) is used to unidirectionally absorb the air in the receiving chamber (2) and discharge it to the outside.

2. The plastic packaging bag with airtightness and moisture-proof function according to claim 1, characterized in that: A flexible spring sheet (64) is provided in the airbag (63), and the flexible spring sheet (64) is used to expand the airbag (63) so as to absorb the air in the bag body (1) into the airbag (63).

3. The plastic packaging bag with airtightness and moisture-proof function according to claim 1, characterized in that: The bag body (1) is also provided with a moisture-proof air inlet (7), which comprises a screw cover (71), an air port piece (72) and a filter layer (73). The screw cover (71) and the air port piece (72) are threadedly sealed to form the moisture-proof air inlet (7), and the filter layer (73) is installed in the air port piece (72). The screw cover (71) is provided with a plurality of air holes (75).

4. The plastic packaging bag with airtightness and moisture-proof function according to claim 1, characterized in that: A second cavity (9) is further provided outside the receiving cavity (2) of the bag body (1), and the second cavity (9) is provided with an air nozzle (91), and the air nozzle (91) is used to inflate and deflate the second cavity (9).

5. The plastic packaging bag with airtightness, sealing and moisture-proof function according to claim 1, characterized in that: The sealing strips (5) are provided in two parallel and spaced-apart configurations, and a starch desiccant layer (51) is provided between the two sealing strips (5).

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