Summary of the functions of the air valve
1. Moisture-proof: effectively keep the coffee beans dry and fragrant, and the moisture in the air cannot enter the bag.
2. Buffer: When the coffee bean bag is hit during transportation or falls from a high place, the air in the bag can be discharged from the one-way exhaust valve to reduce the impact caused by the residual gas in the bag and prevent the package from bursting.
3. Exhaust: After the coffee is roasted, the carbon dioxide in the bag can be effectively discharged to prevent the package from bursting.
In addition, some people may have the experience of taking coffee beans on a plane. You will find that the coffee bean bag has become shriveled when you get off the plane, like the packaging state of vacuum rice. This will also affect the flavor and preservation of fresh coffee, because the cabin pressure will squeeze the air out of the coffee bean bag. At this time, just tape the air valve first, and then put it in a ziplock bag to give the coffee beans an extra layer of protection. Try it next time to see if it works!
