Comparison
Mycelium Composite vs PETG
A side-by-side comparison of Mycelium Composite Material, Structural Grade V and Polyethylene Terephthalate Glycol.
Physical
Density
0.1 - 0.5 g/cm³
1.27 g/cm³
Water Absorption (24h)
2.0-5.0 %
0.13 %
Transparency
Opaque
Transparent
Shrinkage
Varies with growth process
0.2 – 0.5 %
Mechanical
Young's Modulus
Highly variable (depends on density and substrate)
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
Not applicable (natural material)
80 °C
Melting Point
None (decomposes)
—
Continuous Service Temperature
60 °C
65 °C
Heat Deflection Temperature
Not applicable
70 °C
CTE
—
68 × 10⁻⁶ /K
Electrical
Dielectric Constant
Variable
3.3
Volume Resistivity
Variable
10¹⁴ Ω·cm
Dielectric Strength
Low to moderate
—
Chemical resistance
Acids
Sensitive
Good
Bases
Sensitive
Fair
Solvents
Resistant to most common solvents but can be degraded by strong acids/bases
—
UV Resistance
Poor
Fair
Alcohols
—
Good
Oils
—
Good
Sustainability
Recyclability
Biodegradable (compost)
Recyclable
Recycling Code
7 (Other)
1
Carbon Footprint
Negative to very low (utilizes waste streams, sequesters carbon)
~2.7 kg CO₂e / kg
Bio-based Content
—
0 %