Comparison
PA66 vs PEEK
A side-by-side comparison of Polyamide 6,6 (Nylon) and Polyether Ether Ketone.
Physical
Density
1.14 g/cm³
1.32 g/cm³
Water Absorption (24h)
1.2 %
0.15 %
Transparency
Opaque
Opaque (amber)
Shrinkage
1.5 – 2.0 %
1.1 – 1.4 %
Mechanical
Young's Modulus
3.0 GPa (dry)
3.6 GPa
Tensile Strength
80 MPa
100 MPa
Flexural Strength
110 MPa
170 MPa
Impact Strength (Izod)
50 J/m
55 J/m
Elongation at Break
60 %
50 %
Thermal
Melting Point
255 – 265 °C
343 °C
Glass Transition Temperature
70 °C
143 °C
Continuous Service Temperature
100 – 120 °C
260 °C
Heat Deflection Temperature
75 °C (unfilled)
160 °C
Electrical
Dielectric Constant
4.0
3.2
Volume Resistivity
10¹² Ω·cm
10¹⁶ Ω·cm
Chemical resistance
Acids
Poor
Excellent
Bases
Good
Excellent
Alcohols
Good
—
Oils & Fuels
Excellent
—
UV Resistance
Fair
Fair
Solvents
—
Excellent
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Recyclable
Recyclable (specialty)
Recycling Code
7
7
Bio-based Content
0 – 100 % (bio grades)
—
Carbon Footprint
~7.4 kg CO₂e / kg
~30 kg CO₂e / kg