The transparency of PVC film is better than that of polyethylene and polypropylene. Common products include plates, pipes, shoe soles, toys, doors and windows, wire sheaths, stationery, etc. PVC film generally refers to soft PVC, which is widely used in the surface layer of floors, ceilings and leather. However, because soft PVC contains softeners (this is also the difference between soft PVC and hard PVC), it is easy to become brittle and difficult to store, so its use range been limited. Hard PVC does not contain softeners, so it has good flexibility, easy to form, not easy to be brittle, non-toxic and pollution-free, and has a long storage time, so it has great development and application value.