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How coffee bag works?

    Can the roasted coffee beans be brewed immediately? Yes, but it’s not necessarily delicious. Freshly roasted coffee beans will have a bean-raising period. This link is to release carbon dioxide and reach the best flavor period of coffee.

    How do we store coffee? To store coffee beans, we thought of using coffee bags for the first time, but have you carefully observed the coffee beans packaging bags? Have you noticed a white or transparent valve on the back or inside of the coffee bag? Or did you see it and didn’t care? Don’t see how small this valve is, you just think it’s dispensable. In fact, the small gas valve is the secret of the life or death of coffee beans.

    This valve is what we call the “coffee exhaust valve”, it is called a one-way exhaust valve. The one-way exhaust valve plays a vital role in helping your fresh coffee stay fresh for a longer period of time. The one-way exhaust valve in the coffee bean packaging bag is a packaging bag accessory that prevents air from returning. Simply summarize the role of the one-way exhaust valve valve has two points, one is to exhaust the gas in the bag, and the other is to isolate the air outside the packaging bag from entering. Next, Dxuia Package will introduce these two functions and how it works.

1. Exhaust

    Green coffee beans contain acids, proteins, esters, carbohydrates, water and caffeine. After the green coffee beans are roasted at a high temperature, a series of chemical reactions such as Maillard reaction will produce carbon dioxide. Generally speaking, the carbon dioxide and other volatile gases released by roasted coffee beans account for 2% of the weight of the whole coffee beans. And 2% of the gas will be slowly released from the fiber structure of the beans, and the release time will be related to the roasting method. Because coffee beans evaporate carbon dioxide by themselves, we will see that roasted coffee beans will bulge up over time when they are packed in a sealed bag. This is the so-called “bag up”. With the one-way exhaust valve, it will help to remove these inert gases from the coffee bag in time, and will not allow these gases to oxidize the coffee beans and keep the coffee beans in a good fresh state.

2. Isolate the air

    While exhausting, how can our coffee packaging bags isolate the air? One-way valves are different from ordinary air valves. If an ordinary air valve is used, while discharging the gas in the coffee packaging bag, it will also allow the air outside the packaging belt to flow into the bag, destroying the airtightness of the coffee bag and causing the coffee to continue to oxidize. Oxidation of coffee beans will volatilize the aroma and the ingredients will deteriorate. The one-way exhaust valve does not do this, it discharges the carbon dioxide in the coffee bag in time, and does not allow outside air to enter the bag. So, how does it prevent outside air from entering the belt? Duxia Package tells you how it works: When the air pressure in the bag reaches a certain threshold, the valve of the one-way exhaust valve opens to release the air in the bag; until the air pressure drops below the threshold of the one-way valve. The valve of the one-way valve is closed, and the coffee packaging bag returns to the sealed state.

    Therefore, we conclude that the unidirectionality of the coffee exhaust valve is the most basic requirement of the coffee packaging bag, and it is also the most advanced requirement. . duxia package is a professional manufacturer of coffee bean packaging bags. We use high-quality one-way exhaust valves in coffee packaging bags. If you need to customize professional and personalized coffee packaging, please leave your contact information in the form below, or contact our sales manager directly, welcome your inquiry!


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