Polyvinyl chloride (abbreviated: PVC) is the world's third-most widely produced synthetic plastic polymer, after polyethylene and polypropylene. About 40 million tonnes are produced per year.
It is a kind of packaging film with comprehensive properties. It has good transparency and luster, good air tightness and fragrance retention, medium moisture resistance and low moisture permeability.
The soft membrane ceiling belongs to the flexible ceiling, which is commonly known as the light membrane.