Comparison
Bio-PE Low Density vs PETG
A side-by-side comparison of Bio-based Polyethylene, Low Density and Polyethylene Terephthalate Glycol.
Physical
Density
0.918-0.935 g/cm³
1.27 g/cm³
Water Absorption (24h)
< 0.01 %
0.13 %
Transparency
Translucent to opaque
Transparent
Shrinkage
3.0 - 6.0 %
0.2 – 0.5 %
Mechanical
Young's Modulus
0.15-0.30 GPa
2.1 GPa
Tensile Strength
8-15 MPa
50 MPa
Elongation at Break
500-900 %
120 %
Impact Strength (Izod)
1.5-3.0 J/cm
100 J/m
Flexural Strength
—
70 MPa
Thermal
Glass Transition Temperature
-120 °C
80 °C
Melting Point
105-115 °C
—
Continuous Service Temperature
50 °C
65 °C
Heat Deflection Temperature
30 °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 LDPE)
Recyclable
Recycling Code
4 (LDPE)
1
Carbon Footprint
Significantly lower due to renewable source
~2.7 kg CO₂e / kg
Bio-based Content
—
0 %