Comparison
Bio-PET Film Grade Z vs PETG
A side-by-side comparison of Bio-based Polyethylene Terephthalate, Film Grade Z and Polyethylene Terephthalate Glycol.
Physical
Density
1.39 g/cm³
1.27 g/cm³
Water Absorption (24h)
0.3 %
0.13 %
Transparency
Excellent
Transparent
Shrinkage
0.8 - 1.5 %
0.2 – 0.5 %
Mechanical
Young's Modulus
2.8 GPa
2.1 GPa
Tensile Strength
55 MPa
50 MPa
Elongation at Break
10 %
120 %
Impact Strength (Izod)
0.3 J/cm
100 J/m
Flexural Strength
—
70 MPa
Thermal
Glass Transition Temperature
75 °C
80 °C
Melting Point
250 °C
—
Continuous Service Temperature
70 °C
65 °C
Heat Deflection Temperature
60 °C
70 °C
CTE
—
68 × 10⁻⁶ /K
Electrical
Dielectric Constant
3.1
3.3
Volume Resistivity
10¹⁴ Ω·cm
10¹⁴ Ω·cm
Dielectric Strength
21 kV/mm
—
Chemical resistance
Acids
Good resistance
Good
Bases
Poor resistance
Fair
Solvents
Resistant to oils and greases, but can be affected 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 %