Have you ever carefully observed the packaging bag of coffee beans? The structure of the coffee packaging bag is very special. Have you noticed that there are several "small holes" in the back of the coffee bag?On the back of the coffee packaging bag, we often see a round raised air valve with a cir

Coffee is very common in life. When buying coffee, you may notice a round valve on the coffee bag and wonder what they are used for. Coffee beans keep giving out large quantities of carbon dioxide for many hours after they have been roasted. Due to this off-gassing process, coffee beans and powder

Modern coffee stock bags can be made of compostable materials such as rice or kraft paper. They can also be made of stronger recyclable or reusable materials such as low density polyethylene (LDPE) and polylactic acid (PLA). Coffee businesses around the world have been working towards a more sustain