The role of the coffee bag air valve and seal strip
We often find that there is an air valve or tin tie on the coffee bag. What is that and what is the function of them?
In coffee packaging, degassing valves and sealing strips play important roles:
Function: The degassing valve in coffee bags allows the release of carbon dioxide gas while preventing oxygen from entering the bag. This is crucial for freshly roasted coffee beans, as they release carbon dioxide gas after roasting, which, if not properly released, could cause the bag to burst.
Features: The valve is typically a small hole that incorporates a membrane or filter to prevent the entry of oxygen while allowing gas to be released.
Function: The sealing strip is used to effectively seal the coffee bag, preventing the entry of air, moisture, and odors, thus maintaining the freshness and flavor of the coffee.
Features: The sealing strip is usually a reusable strip-like material attached at the opening of the bag, providing an effective seal through methods such as heat sealing, pressure sealing, or zip-lock sealing.
These devices and design elements play a crucial role in coffee packaging, helping to preserve the freshness, flavor, and quality of the coffee.
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