Comparison
Bio-PET Bottle Grade O vs PLA
A side-by-side comparison of Bio-based Polyethylene Terephthalate, Bottle Grade O and Polylactic Acid.
Physical
Density
1.38-1.40 g/cm³
1.24 g/cm³
Water Absorption (24h)
0.3 %
0.5 %
Transparency
Excellent
Semi-transparent
Shrinkage
1.0 - 2.0 %
0.3 – 0.5 %
Mechanical
Young's Modulus
2.5-3.5 GPa
3.5 GPa
Tensile Strength
50-75 MPa
50 – 65 MPa
Elongation at Break
5-20 %
6 %
Impact Strength (Izod)
0.3-0.5 J/cm
16 J/m
Flexural Strength
—
80 MPa
Thermal
Glass Transition Temperature
70-80 °C
60 °C
Melting Point
240-260 °C
150 – 160 °C
Continuous Service Temperature
70 °C
45 °C
Heat Deflection Temperature
65 °C
55 °C
Electrical
Dielectric Constant
3.0-3.3
3.0
Volume Resistivity
10¹⁴ Ω·cm
10¹⁴ Ω·cm
Dielectric Strength
20 kV/mm
—
Chemical resistance
Acids
Good resistance
Fair
Bases
Poor resistance
Poor
Solvents
Resistant to oils and greases, but can be attacked by strong bases and chlorinated solvents
—
UV Resistance
Moderate
Poor
Alcohols
—
Fair
Hydrolysis
—
Poor
Sustainability
Recyclability
Recyclable (same as fossil-based PET)
Industrially compostable
Recycling Code
1 (PET)
7
Carbon Footprint
Reduced compared to virgin fossil-based PET
~1.6 kg CO₂e / kg
Bio-based Content
—
100 %