LDPE is made by compressing ethylene gas and then putting it in a reaction vessel at temperatures of around 160°C. Here the polymerisation process begins, which converts about 20% of the ethylene into polyethylene. Antioxidants and stabilizers are added to the polyethylene before it’s cooled in water and cut into pellets.
These pellets are dried and screened for contaminants by an air-streaming process, and the resulting LDPE is removed. It’s then packaged and sent to manufacturers for melting and moulding into products.