News - What is that buckle on the Coffee bags?

If you have ever seen a coffee bean bag, you will find that there is a buckle-like object on the surface, and also with some small holes in it, which is called air valve.

The purpose of this setting is to get the carbon dioxide out of the bean bag, because the freshly roasted coffee beans have to be de-aired, more accurately it feels like exhaling.

The air valve of the coffee bean bag is a device that cause the inside gas only goes out but the outside air wll not go in, that is, an one-way valve. The function of the air valve is not only to discharge the gas from the coffee beans, but also to prevent the outside air from penetrating into the bean bag and affecting the quality of the coffee beans.

The function of the valve is to help the carbon dioxide which is from the coffee beans to be discharged, so for the coffee beans, the valve is a device that keeps the air from coming in, effectively keep the beans from being stale too fast and helps retain the quality of your coffee for an extended period of time.

Fresh coffee beans release carbon dioxide.Most of the carbon dioxide remains with the coffee beans for about two weeks , the coffee beans will slowly outgas after roasting is completed.

At the time, if the bag containing the coffee beans does not have this valve to assist the degas, the coffee beans in the bean bag will continue to exhaust gas, which will cause the bean bag to over-inflate. If the storage environment causes compression, it may cause the bean bag to rupture, thereby destroying the preservation of the coffee beans. (You may not find out that until half a day or several days later after the bursting, when the coffee beans have been deteriorated due to exposure to the air)

Some people like to squeeze the bean bag and smell it especially from the valve.However,it's not the original intention of the bean bag designer, because carbon dioxide and air keep coffee beans fresh.The squeeze will cause the loss of the aroma and it affects the quality of coffee beans, so try to avoid the smell of coffee beans this way.

Hongze Import & Export Co.,Ltd.www.stblossom.com has been committing to various custom coffee bags and other flexible packaging products for many years. Welcome to inquire, and we will provide you with satisfactory service.