- One-way exhaust valve bag:

These types of bags are commonly used for coffee packaging, but also for food that needs to be kept fresh.

As we know, fresh coffee will generate large amounts of carbon dioxide. The coffee bag with a one-way exhaust valve can prevent the intrusion of external gas, but at the same time automatically release the gas coming from the coffee to keep it fresh and full of flavor. The one-way exhaust valve bag expulse the oxygen out so doesn’t allow bacteria and mildew to develop on fresh food.

The general structure of the material: PET/MPET/PE, PET/AL/PE

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