The production process of PVC film materials is relatively complex, mainly including raw material preparation, batching and mixing, melt extrusion, rolling and cooling, traction and winding, surface treatment, quality inspection and packaging, and other steps. During the production process, it is necessary to strictly control parameters such as temperature, time, and pressure to ensure the quality and performance of the membrane material. PVC color changing film is a popular product in the automotive beauty market. Car owners can choose different colored films according to their preferences to change the color of the car body and achieve personalized customization.