Comparison
PLA High Temp Grade B vs PEEK
A side-by-side comparison of Polylactic Acid, High Temperature Grade B and Polyether Ether Ketone.
Physical
Density
1.25 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.35 %
0.15 %
Transparency
Good
Opaque (amber)
Shrinkage
2.5 - 5.5 %
1.1 – 1.4 %
Mechanical
Young's Modulus
3.6 GPa
3.6 GPa
Tensile Strength
58 MPa
100 MPa
Elongation at Break
2.5 %
50 %
Impact Strength (Izod)
0.25 J/cm
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
65-70 °C
143 °C
Melting Point
160-175 °C
343 °C
Continuous Service Temperature
60 °C
260 °C
Heat Deflection Temperature
58 °C
160 °C
Electrical
Dielectric Constant
3.3
3.2
Volume Resistivity
10¹¹ Ω·cm
10¹⁶ Ω·cm
Dielectric Strength
22 kV/mm
—
Chemical resistance
Acids
Poor resistance
Excellent
Bases
Poor resistance
Excellent
Solvents
Resistant to oils and greases, but swells in chlorinated hydrocarbons
Excellent
UV Resistance
Poor
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Compostable (industrial)
Recyclable (specialty)
Recycling Code
7 (Other)
7
Carbon Footprint
Lower than fossil-based plastics
~30 kg CO₂e / kg