Stand Up Pouches | Flat Pouches | Custom Printed Flexible Packaging — degassing valves

Why Use a Degassing Valve?

Coffee Packaging degassing valves flexible films stand up pouches

Have you ever noticed the rigid circular button-like object at the center of certain pouches and flexible bags? It's called a one-way degassing valve, often used on fermented food and coffee packaging. Typically made out of high-density polyethylene (HDPE), the degassing valve's purpose is to periodically allow gas to exit out from the inside of the package when the internal pressure exceeds a certain (small) value. As the name implies, air cannot flow from the outside inwards (because it's a "one way" valve), resulting in an airtight seal to keep the internal contents fresh. How does it work? When the internal pressure is below a...

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