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