Comparison
Bio-PE High Density vs PETG
A side-by-side comparison of Bio-based Polyethylene, High Density and Polyethylene Terephthalate Glycol.
Physical
Density
0.941-0.965 g/cm³
1.27 g/cm³
Water Absorption (24h)
< 0.01 %
0.13 %
Transparency
Opaque
Transparent
Shrinkage
2.0 - 5.0 %
0.2 – 0.5 %
Mechanical
Young's Modulus
0.8-1.5 GPa
2.1 GPa
Tensile Strength
18-30 MPa
50 MPa
Elongation at Break
500-800 %
120 %
Impact Strength (Izod)
2.0-5.0 J/cm
100 J/m
Flexural Strength
—
70 MPa
Thermal
Glass Transition Temperature
-120 °C
80 °C
Melting Point
120-135 °C
—
Continuous Service Temperature
70 °C
65 °C
Heat Deflection Temperature
40 °C
70 °C
CTE
—
68 × 10⁻⁶ /K
Electrical
Dielectric Constant
2.3
3.3
Volume Resistivity
> 10¹⁵ Ω·cm
10¹⁴ Ω·cm
Dielectric Strength
25 kV/mm
—
Chemical resistance
Acids
Excellent resistance
Good
Bases
Excellent resistance
Fair
Solvents
Resistant to most organic solvents at room temperature
—
UV Resistance
Moderate (requires additive)
Fair
Alcohols
—
Good
Oils
—
Good
Sustainability
Recyclability
Recyclable (same as fossil-based HDPE)
Recyclable
Recycling Code
2 (HDPE)
1
Carbon Footprint
Significantly lower due to renewable source
~2.7 kg CO₂e / kg
Bio-based Content
—
0 %