Polypropylene (PP)

Polypropylene is an economical material that offers a combination of outstanding physical, mechanical, thermal, and electrical properties not found in any other thermoplastic. Compared to low or high density polyethylene, it has a lower impact strength, but superior working temperature and tensile strength. Noted for its excellent chemical resistance in corrosive environments, Polypropylene provides excellent resistance to organic solvents, degreasing agents and electrolytic attack. It is light in weight, resistant to staining, and has a low moisture absorption rate.

Polypropylene is available in two basic types as either homopolymer or copolymer material. Although similar in many respects each type exhibits distinct differences in both appearance and performance.





Features & Benefits

  • Lightweight
  • Chemical resistant
  • Heat resistant
  • Poor impact resistance at low temperature
  • Difficult to paint or bond with adhesives


  • Glass transition temperature: -10oC.
  • Melting temperature: 173oC.
  • Amorphous density at 25oC: 0.85 g/cm3.
  • Crystalline density at 25oC: 0.95 g/cm3.
  • Molecular weight of repeat unit: 42.08 g/mol.


used in automotive parts, appliances, consumer products, packaging and nonwovens