4 oz Compostable coffee bags with valve

The small hole on the coffee bean bag is a one-way exhaust valve because after roasting coffee beans, its own will release carbon dioxide; if not installed one-way exhaust valve, it will cause the bag to rise, and in severe cases, it will even cause the bag to fry, one-way exhaust valve oxygen is not into the inner bag, and excess gas can be discharged through it.

Coffee bags will come with a one-way valve device, not just a tiny hole; this device can play two leading roles:

1, can block the external air into the package and cause the coffee beans oxidation and deterioration.

2, can be released from the coffee bean carbon dioxide out of the package; the more profound the roast degree of coffee beans, the more carbon dioxide will be shot. A one-way valve will not cause the risk of rising bags bursting and causing losses.

First, let’s see how the packaging of coffee beans works. Usually, the bags are made of aluminum foil or plastic material. This material prevents oxygen, moisture, and light from entering the bag, thus protecting the freshness and flavor of the coffee beans. However, a wholly closed bag can also have the problem that the gases inside the bag cannot escape, which can lead to the smell and taste of the coffee beans themselves being trapped in the bag, and there is also a risk of the beans rotting. Therefore, the manufacturer will add a small hole in the package to allow the gas to escape through the bag.

However, the role of this small hole will be more complex; it also has an excellent filter function. Most holes are now made with the help of flexible film lamination technology. The flexible film has excellent gas permeability and filtering properties, making it very suitable as one of the materials for coffee bean bags.

The second reason is to make the coffee beans smell better. Because coffee beans are flavorful, they can develop some sour flavors after sitting for a long time. Such a tiny hole provides a ventilation channel for them. This means that the beans were initially packaged in an airtight package, and their odor will cause the air in the box to become tasteless, which will affect not only the oral sensation of coffee drinkers but also other items containing coffee beans, such as coffee machines and jars of coffee beans, will also be affected. This small hole solves this problem. Adding this tiny hole in the package allows the gas to circulate through the box and remove the stale odor, thus making the beans taste purer and more flavorful.

The third reason is to make the freshness of the coffee beans last longer. This is also the reason why the manufacturer would make a small hole. Because the gas can escape through sure narrow small holes, and this buildup of gas, many of which are related to the beans themselves, many volatile odor components, so that over time, these components will be unloaded; if there is no opportunity for ventilation and air, once the bag is opened to feel the smell, it is likely that not all the scent of the coffee beans themselves, but the beans and the smell of the air generated by their mixture. On the contrary, if there is a small hole in the bag, it will allow the beans to breathe, releasing the odor and giving a fresher smell to the package. Also, removing certain gases and humidity can prevent the coffee beans from becoming sour.

Finally, another point to remember is that if the coffee beans are stored in the bag for too long, even with a small hole, their smell and taste will be affected. Using the packaged coffee beans within one to two months is best to enjoy the best flavor. Of course, this is for coffee bean storage methods; storage temperature, humidity, and other environmental factors are specific requirements and norms, and only a full range of good coffee bean storage management and maintenance to avoid damage to its quality and taste.

In short, the small hole in the coffee bean bag is tiny, but it has an important impact on the coffee beans’ freshness, taste, and texture. The small holes provide access to the coffee beans for ventilation and avoid the accumulation of gases in the bag. This state gives the coffee beans a more pronounced fresh flavor and taste. Therefore, when buying coffee beans, if you see small holes, do not worry about any defect or product quality; it is there for you to have delicious coffee.