re:Food bag material

Food bag material

   The main materials are: PVDC (polyvinylidene chloride), PE (polyethylene), PA (nylon), EVOH (ethylene vinyl alcohol copolymer), aluminized film (aluminum + PE), etc.
Different materials of different performance, use different. General food bags are not a single material, usually multi-layer composite.
However, the bag is not a single material, the general inner layer is PE, the outer layer is PA, the middle may EVOH, or PVDC, etc. are used aluminum foil.
Reason: PE heat sealing better, it is easy to seal
PA printing is better, used in the outer layer, you can print beautiful screen.
PVDC, EVOH barrier is better, to prevent oxidation. Dilute aluminum film is good, not easy to see the light of the product is appropriate.
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