Comparison
Bio-PET Film Grade Z vs PEEK
A side-by-side comparison of Bio-based Polyethylene Terephthalate, Film Grade Z and Polyether Ether Ketone.
Physical
Density
1.39 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.3 %
0.15 %
Transparency
Excellent
Opaque (amber)
Shrinkage
0.8 - 1.5 %
1.1 – 1.4 %
Mechanical
Young's Modulus
2.8 GPa
3.6 GPa
Tensile Strength
55 MPa
100 MPa
Elongation at Break
10 %
50 %
Impact Strength (Izod)
0.3 J/cm
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
75 °C
143 °C
Melting Point
250 °C
343 °C
Continuous Service Temperature
70 °C
260 °C
Heat Deflection Temperature
60 °C
160 °C
Electrical
Dielectric Constant
3.1
3.2
Volume Resistivity
10¹⁴ Ω·cm
10¹⁶ Ω·cm
Dielectric Strength
21 kV/mm
—
Chemical resistance
Acids
Good resistance
Excellent
Bases
Poor resistance
Excellent
Solvents
Resistant to oils and greases, but can be affected 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