Coffee bags are used as packaging bags for coffee beans and coffee powder. Among many products, customers not only pay attention to the brand awareness of coffee itself, but also the packaging design of coffee bags is also a very important factor that affects their purchase. More importantly, how can customers buy high-quality coffee without opening the package? Very simple, that is to see if there is a one-way exhaust valve installed on the coffee bags!
The principle of coffee exhaust valve:
"When the air pressure in the bag is greater than the set value of the single valve, the gas rushes to open the valve and then releases the gas"
After coffee beans are roasted, they will release a lot of gas, carbon dioxide and some roasting exhaust gas! In the process of transportation of coffee beans, it is likely to fry the bags and cause losses.
If it is not sealed, it may be affected by the quality of the outside air, and it may be polluted by moisture and odor.
At this time, the single-phase exhaust valve plays a big role, isolating the outside air, and the internal air pressure is large, and it is automatically discharged.
However, this does not mean that everything is OK with the installation of a single exhaust valve.
For ordinary espresso beans, the single-item exhaust is considered a safety guarantee, and the guarantee is more for the interests of the merchants, and it does not improve the quality of the coffee beans.
"In some cases, the one-way vent actually makes the coffee harder!"
The most commonly used beans are Italian-style deep roasting, and most of these beans have a high gas value. Many times, they are already "inflated" when they are purchased, but there is no exhaust. The exhaust gas of the coffee has been left in the bag, and the coffee beans are also under excessive pressure, which makes the coffee very oily. The oil exploded, changing the properties of the coffee beans. As soon as the beans are opened, the pungent smell is still very rare, not a good smell. I'm already hurt! To faint!
And this is the reason why some beans, after opening a new bag of beans, make the coffee taste a little "heavy". The reason it would be nice to make a few more cups. If this happens, it is recommended to pour out the beans and wake up first. Leave it for a while to make coffee and the taste will be much softer.
Function of coffee exhaust valve:
1. Since the roasted coffee beans will produce carbon dioxide, this air valve can discharge the carbon dioxide into the bag, and can also prevent the oxygen outside the bag from entering the bag to oxidize the beans, thus ensuring the fresh quality of the coffee and eliminating the resulting air pollution. Risk of swelling or bursting of the coffee bags.
2. In addition, the air valve is installed on the coffee bags, the customer can directly squeeze the bag when purchasing, and the aroma of the coffee will be transmitted directly from the bag to let the customer smell its aroma, so that the customer can better confirm the freshness of the coffee.
Therefore, it is very important to install a one-way exhaust valve on the coffee bags. To be more precise: there must be a one-way exhaust valve on the professional coffee packaging bags!
Many things like coffee have a long shelf life, and the tasting period is actually not long. What I advocate is that the coffee beans are used up during the tasting period, and there is no need to add an additional single exhaust valve.
Just make the coffee beans taste good. The excess gas automatically forms a protective layer during the tasting period, and the exhaust gas can be discharged better. On the contrary, the shelf life is slightly shorter, and the general Italian beans are stored in this way. The appearance of the month.