Comparison
Bio-PET Bottle Grade O vs PETG
A side-by-side comparison of Bio-based Polyethylene Terephthalate, Bottle Grade O and Polyethylene Terephthalate Glycol.
Physical
Density
1.38-1.40 g/cm³
1.27 g/cm³
Water Absorption (24h)
0.3 %
0.13 %
Transparency
Excellent
Transparent
Shrinkage
1.0 - 2.0 %
0.2 – 0.5 %
Mechanical
Young's Modulus
2.5-3.5 GPa
2.1 GPa
Tensile Strength
50-75 MPa
50 MPa
Elongation at Break
5-20 %
120 %
Impact Strength (Izod)
0.3-0.5 J/cm
100 J/m
Flexural Strength
—
70 MPa
Thermal
Glass Transition Temperature
70-80 °C
80 °C
Melting Point
240-260 °C
—
Continuous Service Temperature
70 °C
65 °C
Heat Deflection Temperature
65 °C
70 °C
CTE
—
68 × 10⁻⁶ /K
Electrical
Dielectric Constant
3.0-3.3
3.3
Volume Resistivity
10¹⁴ Ω·cm
10¹⁴ Ω·cm
Dielectric Strength
20 kV/mm
—
Chemical resistance
Acids
Good resistance
Good
Bases
Poor resistance
Fair
Solvents
Resistant to oils and greases, but can be attacked by strong bases and chlorinated solvents
—
UV Resistance
Moderate
Fair
Alcohols
—
Good
Oils
—
Good
Sustainability
Recyclability
Recyclable (same as fossil-based PET)
Recyclable
Recycling Code
1 (PET)
1
Carbon Footprint
Reduced compared to virgin fossil-based PET
~2.7 kg CO₂e / kg
Bio-based Content
—
0 %