Why Do Coffee Bags Need A Valve?

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 circle of small holes around it. This is a common component of the coffee bag and an indispensable structural component of the coffee bag - a one-way exhaust valve.

The one-way exhaust valve in the coffee bean packaging bag is a component that prevents air from flowing back. The one-way exhaust valve occupies a pivotal position in the packaging process of coffee. Its core function is to release gases such as carbon dioxide produced by coffee beans, so as to maintain a good gaseous environment in the package, thereby locking in the high-quality taste and quality of coffee. So, why does the coffee bag need a one-way coffee valve?

Green coffee beans contain acids, proteins, esters, carbohydrates, water, and caffeine. After high-temperature roasting, green coffee beans will produce carbon dioxide through a series of chemical reactions such as the Maillard reaction. Generally speaking, carbon dioxide and other volatile gases account for 2% of the weight of the whole coffee beans after roasting. The 2% gas will slowly release from the fiber structure of the beans, and the release time will be related to the roasting method. Because coffee beans volatilize carbon dioxide themselves, we can see that the roasted coffee beans will swell up over time when they are packed in a sealed bag.

So, is carbon dioxide good or bad for coffee beans?

The answer is bad. If these gases are not discharged in time, it will cause an imbalance in the internal environment of the package, which will have an adverse effect on the quality and taste of the coffee. The original intention of the design of the coffee one-way valve is to solve this problem. It can effectively release gas while encapsulating coffee beans, thereby ensuring the stability of the internal pressure and gaseous environment of the package, and preventing the oxidation and deterioration of coffee. The one-way valve usually adopts a high-elastic diaphragm structure, which allows the valve to be tightly closed when compressed, and automatically open when a certain pressure is reached. This design not only realizes the continuous release of gas but also effectively blocks the intrusion of external air and moisture, thereby slowing down the increase in moisture content and oxidation rate of coffee.

Although the coffee one-way valve is small, it is crucial to ensure the quality and taste of coffee, especially in the packaging and transportation of coffee. In addition, the one-way degassing valve on the coffee bag can isolate the light and air outside the packaging bag from intrusion, so that the coffee beans can be stored in the best packaging state and maintain the freshness and original taste of the coffee beans. Whether you are a coffee lover or a coffee roaster, understanding the importance of this small but important component will have a significant impact on your coffee experience and brand image.

Biopack provides customized coffee bags with one-way valves to ensure that your coffee remains fresh and delicious. For more information on high-quality coffee packaging, consider exploring Biopack's one-stop coffee packaging solutions and learn how they can help enhance your brand.