Plastics, which are referred to as synthetic resins, are categorized into two groups: thermosetting resins and thermoplastic resins. PVC is a thermoplastic polymer, alongside polyethylene (PE), polystyrene (PS), and polypropylene (PP). PVC consists of 57% chlorine and 43% carbon, which mainly comes from oil or gas through ethylene. The production of PVC utilizes fewer non-renewable materials like oil or natural gas compared to other plastics, which makes it a more resource-efficient option.