Comparison
Lignin Filler vs PETG
A side-by-side comparison of Lignin, Filler Grade S and Polyethylene Terephthalate Glycol.
Physical
Density
1.2-1.4 g/cm³
1.27 g/cm³
Water Absorption (24h)
2.0-5.0 %
0.13 %
Transparency
Opaque
Transparent
Shrinkage
Varies with matrix
0.2 – 0.5 %
Mechanical
Young's Modulus
Highly variable (depends on source and processing)
2.1 GPa
Tensile Strength
Highly variable
50 MPa
Elongation at Break
Highly variable
120 %
Impact Strength (Izod)
Highly variable
100 J/m
Flexural Strength
—
70 MPa
Thermal
Glass Transition Temperature
100-150 °C
80 °C
Melting Point
None (degrades)
—
Continuous Service Temperature
70 °C
65 °C
Heat Deflection Temperature
Varies with matrix
70 °C
CTE
—
68 × 10⁻⁶ /K
Electrical
Dielectric Constant
3.5-4.5
3.3
Volume Resistivity
10⁹-10¹² Ω·cm
10¹⁴ Ω·cm
Dielectric Strength
10-20 kV/mm
—
Chemical resistance
Acids
Moderate resistance
Good
Bases
Poor resistance
Fair
Solvents
Soluble in some organic solvents like DMSO, dioxin
—
UV Resistance
Good (inherent)
Fair
Alcohols
—
Good
Oils
—
Good
Sustainability
Recyclability
Biodegradable (if not compounded with non-biodegradable matrix)
Recyclable
Recycling Code
7 (Other)
1
Carbon Footprint
Negative to very low (utilizes byproduct)
~2.7 kg CO₂e / kg
Bio-based Content
—
0 %