Comparison

Bio-PET Bottle Grade O vs PEEK

A side-by-side comparison of Bio-based Polyethylene Terephthalate, Bottle Grade O and Polyether Ether Ketone.

Physical

Density
1.38-1.40 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.3 %
0.15 %
Transparency
Excellent
Opaque (amber)
Shrinkage
1.0 - 2.0 %
1.1 – 1.4 %

Mechanical

Young's Modulus
2.5-3.5 GPa
3.6 GPa
Tensile Strength
50-75 MPa
100 MPa
Elongation at Break
5-20 %
50 %
Impact Strength (Izod)
0.3-0.5 J/cm
55 J/m
Flexural Strength
170 MPa

Thermal

Glass Transition Temperature
70-80 °C
143 °C
Melting Point
240-260 °C
343 °C
Continuous Service Temperature
70 °C
260 °C
Heat Deflection Temperature
65 °C
160 °C

Electrical

Dielectric Constant
3.0-3.3
3.2
Volume Resistivity
10¹⁴ Ω·cm
10¹⁶ Ω·cm
Dielectric Strength
20 kV/mm

Chemical resistance

Acids
Good resistance
Excellent
Bases
Poor resistance
Excellent
Solvents
Resistant to oils and greases, but can be attacked by strong bases and chlorinated solvents
Excellent
UV Resistance
Moderate
Fair
Hydrolysis (steam)
Excellent

Sustainability

Recyclability
Recyclable (same as fossil-based PET)
Recyclable (specialty)
Recycling Code
1 (PET)
7
Carbon Footprint
Reduced compared to virgin fossil-based PET
~30 kg CO₂e / kg