Exhaust bag and manufacture method thereof

Abstract

The invention discloses an exhaust bag and a manufacture method and application thereof. The exhaust bag comprises a bag body and at least one retaining valve, wherein a holding space is formed by the bag body and is used for storing objects, the bag body is provided with at least one opening and at least one exhaust hole, the objects are placed in the holding space through the openings and then the openings are sealed, the retaining valves are arranged in the bag body and are adjacent to the exhaust holes so that the holding space is communicated with the exhaust holes, air in the holding space arrives at the exhaust holes through the retaining valves and is exhausted from the bag body from the exhaust holes; and because of a one-way retaining function of the retaining valves, outwards discharged air is returned to the holding space from the retaining valves, and therefore, the packaging volume of the whole exhaust bag after the objects are stored in the holding space is greatly reduced, and the exhaust bag is conveniently stored and transported.

Description

technical field [0001] The invention relates to a packaging bag, in particular to a venting bag. Background technique [0002] Existing air vent bags generally include two bag layers, which overlap each other to form a storage space for containing items. The air thus reduces the volume of the whole package, which is convenient for storage and transportation. In the packaging process of food, it is even necessary to use a vacuum device to evacuate the gas in the vent bag and then seal the vent bag, thereby preventing the oxidative deterioration of the food. [0003] However, as mentioned above, these traditional air vent bags need to be equipped with an air extraction device to remove the air inside the air vent bag, if there is no available air extraction device next to the air vent bag, such as during transportation, temporarily When some venting bags need to be pumped, it is impossible to get a good venting effect only by manual work, because when the bag is manually squ...

AI Technical Summary

Problems solved by technology

[0003] However, as mentioned above, these traditional air vent bags need to be equipped with an air extraction device to remove the air inside the air vent bag, if there is no available air extraction device next to the air vent bag, such as during transportation, temporarily When some venting bags need to be pumped, it is impossible to get a good venting effect only by manual work, because when the bag is manually squeezed to vent, the gas will easily return to the bag

The traditional venting bag also needs to set the exhaust valve at the appropriate position of the bag body, which makes the manufacturing process of the venting bag complicated, because after the bag body is sealed and formed, an additional vent valve needs to be installed A step of

[0004] In addition, in order to prevent the air outside the bag from entering the bag, that is, to ensure a low air content in the bag, the bag is usually heat-sealed so that the storage space in the bag is completely isolated from the outside world. The traditional air bag can only be used once and cannot be reused

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