A thermoplastic polymer, polypropylene (also called polypropene) has properties between that of LDPE and HDPE and is one of the most versatile polymers available.

Chemical Composition

Polypropylene Polymer


Polypropene, PP PP | Polypropylene

The symbol for polypropylene developed by the Society of the Plastics Industry so that items can be labeled for easy recycling is:


Semi-rigid, translucent, good chemical resistance, tough, good fatigue resistance, integral hinge property, good heat resistance.

Physical Properties: Value:
Tensile Strength: 0.95 - 1.30 N/mm2
Notched Impact Strength: 3.0 - 30.0 Kj/m2
Thermal Coefficient of Expansion: 100 - 150 x 10-6
Max. Continued Use Temperature: 80 oC (176 oF)
Melting Point: 160 oC (320 oF)
Glass Transition Temp. (atactic): -20 oC (-4 oF)
Glass Transition Temp. (isotactic): 100 oC (212 oF)
Density: 0.905 g/cm3