Comparison
PETG FDM Filament vs PA66
A side-by-side comparison of Polyethylene Terephthalate Glycol-Modified Filament for FDM and Polyamide 6,6 (Nylon).
Physical
Density
1.27 g/cm³
1.14 g/cm³
Water Absorption (24h)
0.3-0.6 %
1.2 %
Transparency
Transparent to Translucent
Opaque
Shrinkage
Low (0.3-0.6%)
1.5 – 2.0 %
Mechanical
Young's Modulus
2.0-2.5 GPa
3.0 GPa (dry)
Tensile Strength
50-60 MPa
80 MPa
Elongation at Break
6-15 %
60 %
Impact Strength (Izod)
6-10 kJ/m²
50 J/m
Flexural Strength
—
110 MPa
Thermal
Glass Transition Temperature
70-80 °C
70 °C
Melting Point
210-250 °C
255 – 265 °C
Continuous Service Temperature
50-60 °C
100 – 120 °C
Heat Deflection Temperature
55-65 °C @ 0.45 MPa
75 °C (unfilled)
Electrical
Dielectric Constant
3.0-3.2
4.0
Volume Resistivity
10¹³-10¹⁵ Ω·cm
10¹² Ω·cm
Dielectric Strength
15-20 MV/m
—
Chemical resistance
Acids
Good resistance to dilute acids and bases
Poor
Bases
Moderate resistance to dilute bases
Good
Solvents
Resistant to oils, greases. Attacked by strong polar solvents.
—
UV Resistance
Good
Fair
Alcohols
—
Good
Oils & Fuels
—
Excellent
Sustainability
Recyclability
Recyclable (PET stream)
Recyclable
Recycling Code
1 (PET)
7
Carbon Footprint
Moderate
~7.4 kg CO₂e / kg
Bio-based Content
—
0 – 100 % (bio grades)