Comparison
Extreme Chemical and Temperature Perfluoroelastomer (Kalrez) vs PA66
A side-by-side comparison of Perfluoroelastomer (FFKM - Kalrez family) and Polyamide 6,6 (Nylon).
Physical
Density
1.9 - 2.15 g/cm³
1.14 g/cm³
Water Absorption (24h)
0.05 %
1.2 %
Transparency
Opaque
Opaque
Shrinkage
1.0 - 2.0 %
1.5 – 2.0 %
Mechanical
Young's Modulus
0.03 - 0.07 GPa
3.0 GPa (dry)
Tensile Strength
10 - 20 MPa
80 MPa
Elongation at Break
100 - 250 %
60 %
Impact Strength (Izod)
N/A
50 J/m
Flexural Strength
—
110 MPa
Thermal
Glass Transition Temperature
0 to 15 °C
70 °C
Melting Point
N/A
255 – 265 °C
Continuous Service Temperature
-20 to 327 °C
100 – 120 °C
Heat Deflection Temperature
N/A
75 °C (unfilled)
Electrical
Dielectric Constant
2.1 - 2.2
4.0
Volume Resistivity
10^15 - 10^17 Ohm-cm
10¹² Ω·cm
Dielectric Strength
15 - 20 kV/mm
—
Chemical resistance
Acids
Outstanding
Poor
Bases
Outstanding
Good
Solvents
Outstanding resistance to virtually all chemicals and solvents
—
UV Resistance
Excellent
Fair
Alcohols
—
Good
Oils & Fuels
—
Excellent
Sustainability
Recyclability
Extremely Limited
Recyclable
Recycling Code
N/A
7
Carbon Footprint
Very High (complex production)
~7.4 kg CO₂e / kg
Bio-based Content
—
0 – 100 % (bio grades)