PVC (Polyvinyl Chloride): Polyvinyl chloride, often with plasticizers and stabilizers to adjust its flexibility. PET (Polyethylene Terephthalate): Polyethylene terephthalate, a polyester polymer. 1.Environmental performance: PVC contains chlorine, which will produce harmful gases (HCl) when burned. Some plasticizers are not environmentally friendly. However, PET does not contain chlorine, is environmentally friendly and recyclable, and is more in line with international environmental protection trends. 2. Hardness: PVC is relatively soft and flexible, with a scratch resistance rating of 1H. PET is harder, has strong stiffness, is not easily deformed, and has a scratch resistance rating of 3-4H. 3.Heat resistance: PVC has poor heat resistance and deforms at about 60-80℃, while PET has better heat resistance and can withstand about 150℃. 4. Cost: PVC raw materials are cheaper and easier to process, while PET raw materials and processing costs are higher. 5. Printing/coating properties: PVC is easy to process and color, and is suitable for low-end decorative films. PET has high surface tension and requires corona/coating treatment, but the finished product is more refined.