What is polypropylene

Polypropylene is a kind of thermoplastic synthetic resin with excellent performance, which is a colorless and translucent thermoplastic lightweight general-purpose plastic.

PVC, a widely used material

As early as 1835, polyvinyl chloride was discovered by V. Lenio of the United States. When sunlight was used to irradiate vinyl chloride, it formed a white solid, namely polyvinyl chloride.