For vacuum packaging bags, we generally require no impurities, transparent and clear. Commonly used for vacuum bags are aluminum foil, nylon, PE, PET, and the like. The characteristic of aluminum foil is that it is protected from light and cannot be transparent. Among the latter materials, nylon is the best transparent material with strong tensile properties and good sealing performance. It is a good material for food vacuum bags.
Nylon vacuum bags are generally made up of NY/PE or PET/NY/PE. What materials are used for compounding depends on the needs of the product.