Comparison
Bio-PET Film Grade Z vs PA66
A side-by-side comparison of Bio-based Polyethylene Terephthalate, Film Grade Z and Polyamide 6,6 (Nylon).
Physical
Density
1.39 g/cm³
1.14 g/cm³
Water Absorption (24h)
0.3 %
1.2 %
Transparency
Excellent
Opaque
Shrinkage
0.8 - 1.5 %
1.5 – 2.0 %
Mechanical
Young's Modulus
2.8 GPa
3.0 GPa (dry)
Tensile Strength
55 MPa
80 MPa
Elongation at Break
10 %
60 %
Impact Strength (Izod)
0.3 J/cm
50 J/m
Flexural Strength
—
110 MPa
Thermal
Glass Transition Temperature
75 °C
70 °C
Melting Point
250 °C
255 – 265 °C
Continuous Service Temperature
70 °C
100 – 120 °C
Heat Deflection Temperature
60 °C
75 °C (unfilled)
Electrical
Dielectric Constant
3.1
4.0
Volume Resistivity
10¹⁴ Ω·cm
10¹² Ω·cm
Dielectric Strength
21 kV/mm
—
Chemical resistance
Acids
Good resistance
Poor
Bases
Poor resistance
Good
Solvents
Resistant to oils and greases, but can be affected by strong bases and chlorinated solvents
—
UV Resistance
Moderate
Fair
Alcohols
—
Good
Oils & Fuels
—
Excellent
Sustainability
Recyclability
Recyclable (same as fossil-based PET)
Recyclable
Recycling Code
1 (PET)
7
Carbon Footprint
Reduced compared to virgin fossil-based PET
~7.4 kg CO₂e / kg
Bio-based Content
—
0 – 100 % (bio grades)