Comparison
POM (Delrin) vs PLA
A side-by-side comparison of Polyoxymethylene and Polylactic Acid.
Physical
Density
1.41 g/cm³
1.24 g/cm³
Water Absorption (24h)
0.25 %
0.5 %
Transparency
Opaque
Semi-transparent
Shrinkage
1.8 – 2.5 %
0.3 – 0.5 %
Mechanical
Young's Modulus
3.1 GPa
3.5 GPa
Tensile Strength
70 MPa
50 – 65 MPa
Flexural Strength
100 MPa
80 MPa
Impact Strength (Izod)
70 J/m
16 J/m
Elongation at Break
25 %
6 %
Thermal
Melting Point
175 °C
150 – 160 °C
Continuous Service Temperature
100 °C
45 °C
Heat Deflection Temperature
110 °C
55 °C
Glass Transition Temperature
—
60 °C
Electrical
Dielectric Constant
3.7
3.0
Volume Resistivity
10¹⁴ Ω·cm
10¹⁴ Ω·cm
Chemical resistance
Acids
Poor
Fair
Bases
Excellent
Poor
Solvents
Excellent
—
UV Resistance
Fair
Poor
Alcohols
—
Fair
Hydrolysis
—
Poor
Sustainability
Recyclability
Recyclable
Industrially compostable
Recycling Code
7
7
Carbon Footprint
~4 kg CO₂e / kg
~1.6 kg CO₂e / kg
Bio-based Content
—
100 %