The range of polypropylene products are:
Homopolymers
Homopolymers are highly isotactic and therefore very crystalline. Articles produced with these materials exhibit high stiffness, toughness and resistance to heat deformation.
Impact Copolymers
Impact copolymers are ethylene-propylene block copolymers that exhibit high impact strength at both ambient and low temperatures. The product line offers an extensive range of fluences. The range of impact resistance extends from moderate to very high, with materials having a high rubber content and high impact resistance at very low temperatures. At the other extreme is 2240P, which is a moderate impact material with high stiffness and high resistance to heat deformation.
Random Copolymers
Random copolymers have a lower degree of crystallinity than homopolymers, so they have a wider melting range, greater transparency and are more resistant to impact at room temperature.