Technical Properties Of Normal Polypropylene

Properties Polypropylene (Melt Index 1 to 3.5)
Specific Gravity / Density at 23°C 0.90-0.91
Water Absorption (% in 24 hrs.) <0.01-0.03
Hardness (Rockwell) 90-95
Tensile Strength-(lb/sq.in.) 4400-4800
Impact Strength -Izod notched-(ft.lbs.) 1.5-2.5
Elongation at break(%) 220-600
Yield Stress (lb/sq.in.) 4400-4800
Flexural Modulus (lb/sq.in.) 1.5X105
Modules Of Elasticity In Tension (lb/sq.in.) 1.5X105
Softening point (°C) 135-150
Load-Heat (Cal/grm/°C) 0.46
Thermal Expansion (in/in./°C) 8.5-11 11 10-5
Mould Shrinkage (in. per Inch) 0.01-0.02
Injection Moulding Temp (°C) 200-300
 
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