introduction to Polyethylene ( PE )
The commonest plastic that can be found in daily life is polyethylene ( PE ) which is polymerized from ethylene industrially fractionated petroleum. […]
introduction to Polypropylene ( PP )
Polypropylene is closely connected with polyethylene with respect to raw materials, manufacturing technique as well as properties. The raw materials, i.e. propylene and ethylene, are both contained in a large amount in the decomposing gas of petroleum. […]