Polypropylene (PP) is a thermoplastic addition polymer, which is used predominantly in injection molding applications. PP is inexpensive and easy to access, and due to its semi-crystalline property it possesses a high flexural strength.

Key Benefits: PP is resistant to moisture absorption, and has a very slippery surface that makes it a good substitute for other plastics in a variety of low-friction applications. Polypropylene‘s properties are similar to polyethylene, but PP is slightly harder and more heat resistant.