Comparison
SLS PP Powder vs PEEK
A side-by-side comparison of Polypropylene Powder for Selective Laser Sintering and Polyether Ether Ketone.
Physical
Density
0.90-0.92 g/cm³
1.32 g/cm³
Water Absorption (24h)
<0.1 %
0.15 %
Transparency
Opaque
Opaque (amber)
Shrinkage
Moderate (1.0-2.0%)
1.1 – 1.4 %
Mechanical
Young's Modulus
0.8-1.2 GPa
3.6 GPa
Tensile Strength
25-35 MPa
100 MPa
Elongation at Break
15-25 %
50 %
Impact Strength (Izod)
High (notched)
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
-10 to 0 °C
143 °C
Melting Point
160-170 °C
343 °C
Continuous Service Temperature
60-70 °C
260 °C
Heat Deflection Temperature
40-50 °C @ 0.45 MPa
160 °C
Electrical
Dielectric Constant
2.2-2.3
3.2
Volume Resistivity
10¹⁵-10¹⁷ Ω·cm
10¹⁶ Ω·cm
Dielectric Strength
20-25 MV/m
—
Chemical resistance
Acids
Excellent resistance
Excellent
Bases
Excellent resistance
Excellent
Solvents
Resistant to most organic solvents. Attacked by strong oxidizing agents.
Excellent
UV Resistance
Poor (requires additives)
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Recyclable (within SLS/MJF process)
Recyclable (specialty)
Recycling Code
5 (PP)
7
Carbon Footprint
Moderate
~30 kg CO₂e / kg