Multiple Sizes Transparent PVC Shrink Wrap Film Heat Shrink Wrap Roll for Packing Packing Custom Logo Polyvinyl Chloride Product Description The substrate of PVC wrapping film is polyvinyl chloride resin, which is made by rolling or blow molding after adding plasticizers and stabilizers. The finished product is usually in the form of a roll, with a light green color at the core, which is a natural color development of stabilizers (such as barium zinc composite system) in PVC