Why is the food packaging bag perforated?

　　General food packaging bags do not need to be perforated, but only to release the air in the bag after sealing, so as to avoid air occupying space. The air hole usually hits the bag body. In addition, the food packaging bag is perforated to prevent children from putting the bag on their heads to suffocate. Another important reason is that if the food packaging bag is not perforated, there will be air in it. After long-term sea transportation, there will be moisture in it, which will cause the products inside to be damp and moldy.

　　Hanging hole: since the packaging bag is mainly used for supermarket shelves, and the storage space of supermarket shelves is limited, in order to use the limited space to place more things, it is necessary to hang holes on the packaging bag. In this way, hanging the goods on the rack can save a lot of space, convenient and beautiful.

　　There are usually two kinds of hanging holes: round holes and aircraft holes (butterfly holes).

　　Stomata: Some goods are divided into inner packaging and outer packaging (most food packaging, such as roast chicken, pig's feet, etc.). The inner package is vacuumized, and the outer package is used as a foil. To facilitate transportation, the package cannot be filled with special drums. At this time, make a hole on the package to exhaust excess air.

　　For safety reasons, some toy packaging food packages should also be perforated to prevent children from choking due to improper operation.

　　1、 In order to facilitate microwave heating.

　　Many fresh food must be soft food, such as steamed buns, toast bread, etc. After being placed for a period of time, the food has already cooled in the hands of customers and must be heated again in the microwave oven. Put some small air holes on the food packaging bag. After heating, the packaging bag will not easily swell, making heating safer and more convenient. This kind of food packaging bag can be used for packaging immediately after air holes are punched according to mechanical equipment and laser. It is generally used for food packaging with a short shelf life of 1 or 2 days, or for some foods stored in cold storage, which is conducive to rapid cold storage.

　　2、 To discharge one or more kinds of gases conveniently

　　After the production, processing and packaging of some foods, the whole process, such as ripening, will cause some gases, which are very bad for food storage and quality assurance, and must be discharged, such as raw coffee bean food. This kind of food packaging bag must be installed with a unilateral exhaust valve after air holes are punched. For example, the exhaust valve of the raw coffee bean packaging bag only allows carbon dioxide to be discharged from the bag, and other gases cannot enter or exit the packaging bag according to the exhaust valve. This kind of food packaging bag also belongs to a kind of intelligent packaging, which is commonly used for food that must be discharged as soon as possible with sealed storage.

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