Comparison
SLS TPU Powder vs PEEK
A side-by-side comparison of Thermoplastic Polyurethane Powder for Selective Laser Sintering and Polyether Ether Ketone.
Physical
Density
1.18-1.23 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.6-1.1 %
0.15 %
Transparency
Translucent to Opaque
Opaque (amber)
Shrinkage
Low (0.0-0.3%)
1.1 – 1.4 %
Mechanical
Young's Modulus
0.02-0.1 GPa (at low strain)
3.6 GPa
Tensile Strength
30-45 MPa
100 MPa
Elongation at Break
350-550 %
50 %
Impact Strength (Izod)
High (deforms)
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
-40 to -20 °C
143 °C
Melting Point
N/A (softens)
343 °C
Continuous Service Temperature
50-70 °C
260 °C
Heat Deflection Temperature
N/A (deforms)
160 °C
Electrical
Dielectric Constant
4.2-4.7
3.2
Volume Resistivity
10⁹-10¹¹ Ω·cm
10¹⁶ Ω·cm
Dielectric Strength
8-13 MV/m
—
Chemical resistance
Acids
Good resistance
Excellent
Bases
Good resistance
Excellent
Solvents
Resistant to oils and greases. Attacked by strong polar solvents.
Excellent
UV Resistance
Good
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Recyclable (within SLS process, often 50% recycled)
Recyclable (specialty)
Recycling Code
7 (Other)
7
Carbon Footprint
Moderate
~30 kg CO₂e / kg