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What are the materials of vacuum food packaging bags

What are the materials of vacuum food packaging bags?The main materials of food vacuum packaging bags are:PVDC(polyvinylidene chloride ), PE(polyethylene),PA(nylon),EVOH(vinyl/vinyl alcohol copolymer), aluminized film(aluminum+PE)etc., where PE(polyethylene)Material is a common material used to make food packaging bags.Food grade vacuum packaging bagFrom the point of view of use,PVDCCan be divided into the following categories:1.for extrusionPVDCresinFresh-keeping self-adhesive(single membrane): […]