Comparison
Flexible Hydrolysis-Resistant Thermoplastic Polyurethane (Polyether) vs PEEK
A side-by-side comparison of Thermoplastic Polyurethane (TPU) - Polyether type and Polyether Ether Ketone.
Physical
Density
1.14 - 1.25 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.5 - 1.5 %
0.15 %
Transparency
Opaque to Translucent
Opaque (amber)
Shrinkage
0.5 - 1.5 %
1.1 – 1.4 %
Mechanical
Young's Modulus
0.01 - 0.1 GPa
3.6 GPa
Tensile Strength
15 - 50 MPa
100 MPa
Elongation at Break
500 - 800 %
50 %
Impact Strength (Izod)
High (10-100+ J/m, notched)
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
-50 to -30 °C
143 °C
Melting Point
140 - 180 °C
343 °C
Continuous Service Temperature
-40 to 90 °C
260 °C
Heat Deflection Temperature
30 - 60 °C
160 °C
Electrical
Dielectric Constant
5.0 - 6.0
3.2
Volume Resistivity
10^10 - 10^12 Ohm-cm
10¹⁶ Ω·cm
Dielectric Strength
15 - 25 kV/mm
—
Chemical resistance
Acids
Good
Excellent
Bases
Good
Excellent
Solvents
Good resistance to oils, greases; swells in strong acids, ketones, and certain solvents
Excellent
UV Resistance
Fair to Good (can yellow)
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Recyclable (thermoplastic)
Recyclable (specialty)
Recycling Code
7 (Other)
7
Carbon Footprint
Moderate
~30 kg CO₂e / kg