What is PVC film synthetic resin?

The popular science synthetic resin of PVC film is a kind of synthetic high molecular weight polymer. It is a resin that has or exceeds the inherent characteristics of natural resins. Synthetic resins are defined as solid, semi-solid or pseudo (quasi) solid organic substances with unrestricted molecular weight. They tend to flow when stressed, often have a softening or melting range, and are shell-shaped when broken.