Coffee packaging bag is a special packaging material specifically used for packaging coffee beans or coffee grounds. They are usually made of composite materials with certain preservation functions, such as polymer films or aluminum foil, to prevent coffee beans or coffee powder from coming into contact with the external environment, maintain their freshness and taste. Coffee packaging bags may also be equipped with a valve to remove carbon dioxide from the inside of the packaging, prevent oxygen from entering, and thus extend the shelf life of the coffee。
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