Comparison
Polypropylene vs PA66
A side-by-side comparison of Polypropylene and Polyamide 6,6 (Nylon).
Physical
Density
0.90 g/cm³
1.14 g/cm³
Water Absorption (24h)
0.01 %
1.2 %
Transparency
Translucent
Opaque
Shrinkage
1.0 – 2.5 %
1.5 – 2.0 %
Mechanical
Young's Modulus
1.5 GPa
3.0 GPa (dry)
Tensile Strength
30 – 40 MPa
80 MPa
Impact Strength (Izod)
40 J/m
50 J/m
Elongation at Break
100 – 600 %
60 %
Flexural Strength
—
110 MPa
Thermal
Melting Point
160 °C
255 – 265 °C
Continuous Service Temperature
100 °C
100 – 120 °C
Heat Deflection Temperature
100 °C
75 °C (unfilled)
Glass Transition Temperature
—
70 °C
Electrical
Dielectric Constant
2.2
4.0
Volume Resistivity
10¹⁷ Ω·cm
10¹² Ω·cm
Chemical resistance
Acids
Excellent
Poor
Bases
Excellent
Good
Solvents
Good
—
UV Resistance
Poor unless stabilized
Fair
Alcohols
—
Good
Oils & Fuels
—
Excellent
Sustainability
Recyclability
Recyclable
Recyclable
Recycling Code
5
7
Carbon Footprint
~1.6 kg CO₂e / kg
~7.4 kg CO₂e / kg
Bio-based Content
—
0 – 100 % (bio grades)