Three types of polypropylene are currently available

Homopolymers – A General Purpose Grade that can be used in a variety of different applications.

Block copolymers – incorporating 5-15% ethylene, have much improved impact resistance extending to temperatures below -20oC.

Random copolymers – incorporate co-monomer units arranged randomly along the polypropylene long chain molecule.

Different PP grades are available depending on the application and chosen processing method.