The air column bag is a more "magical" package: when the gas is filled into the bag, the gas can only enter but not come out without sealing; a person standing on it will not explode even if it is crushed by a car, and it will not explode even if the car is crushed. It's amazing. Why do air column bags have these excellent properties? Here is a detailed explanation of the technical principles behind the "magic" of the air column bag.
Why doesn't the air column bag even have to be sealed, and the gas can only get in and out when it is inflated? This starts with the reverse air stop valve membrane of the air column bag. When the air column bag is manufactured, it will be laminated with two layers of reverse air stop valve film as the inner film. The function of the two layers of air valve film is to provide a channel for air intake to each air column during inflation, and at the same time, After the air pressure, the reverse air stop valve film will be tightly attached to the outer film of one side of the air column bag. With the bonding function provided by the previously prefabricated heat sealing point, the gas circuit will be tightly closed by the air pressure. Up.
Then why does it not explode even when people stand on top of the air column, or even when a car is crushed over the past, why the air column bag has such a strong pressure resistance? This starts with the material of the air column bag. The raw material of the air column bag is nylon co-extruded film. The co-extruded film belongs to a new material technology. Through the multi-die co-extrusion technology, different materials are co-extruded into the same film. The nylon (PA) is located in the inner layer to provide super toughness and resistance. Compression, polyethylene (PE) provides heat-seal performance. Generally, the structure of the seven-layer nylon co-extruded film used for air column bags is PE-PE-TIE-PA-TIE-PE-PE. Different film layers provide different functions, and different film layers converge into the same film.
Why can the air column bag hold the gas for so long, and there are still enough gas in the bag body to protect the product from damage after half a year? This is also provided by the nylon co-extruded film of the air column bag. Nylon is a barrier material with strong gas retention properties. Therefore, the gas column bag can contain gas for up to half a year or even longer.
As a consumer, once you have a general understanding of the basic technology of the air column bag, you will understand why the air column bag is so "magical".
