What is the purpose of sealing and preservation with aluminum foil bag?

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the purpose of sealing and storage with aluminum foil bag is to prevent leakage and air entry.

the heat sealing temperature varies according to the type of PE, and the best heat sealing effect can be achieved by adopting the best temperature
if the temperature is less than, it is naturally not sealed firmly. But if the temperature is too high, it will be easy to tear.

what the aluminum foil bag seals and preserves is that the sealing performance will be better

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