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