Polypropylene or polypropene ( PP) is a thermoplastic polymer, made by the chemical industry and used in a wide variety of applications, including packaging, textiles, stationery, ....

Low-density polyethylene ( LDPE) is a thermoplastic made from oil. It was the first grade of polyethylene, produced in 1933 by Imperial Chemical Industries ( ICI) using a high....

High-density polyethylene ( HDPE) or polyethylene high-density ( PEHD) is a polyethylene thermoplastic made from petroleum. It takes 1.75 kilograms of petroleum ( in terms of....