Comparison
CF-PET Filament vs PLA
A side-by-side comparison of Carbon Fiber Reinforced PET Filament for FDM and Polylactic Acid.
Physical
Density
1.30-1.38 g/cm³
1.24 g/cm³
Water Absorption (24h)
0.3-0.5 %
0.5 %
Transparency
Opaque
Semi-transparent
Shrinkage
Low (0.3-0.5%)
0.3 – 0.5 %
Mechanical
Young's Modulus
7-10 GPa
3.5 GPa
Tensile Strength
60-75 MPa
50 – 65 MPa
Elongation at Break
5-10 %
6 %
Impact Strength (Izod)
5-8 kJ/m²
16 J/m
Flexural Strength
—
80 MPa
Thermal
Glass Transition Temperature
75-85 °C
60 °C
Melting Point
215-255 °C
150 – 160 °C
Continuous Service Temperature
60-70 °C
45 °C
Heat Deflection Temperature
60-70 °C @ 0.45 MPa
55 °C
Electrical
Dielectric Constant
2.8-3.2
3.0
Volume Resistivity
10¹²-10¹⁴ Ω·cm
10¹⁴ Ω·cm
Dielectric Strength
12-18 MV/m
—
Chemical resistance
Acids
Good resistance
Fair
Bases
Moderate resistance
Poor
Solvents
Resistant to oils, greases. Attacked by strong polar solvents.
—
UV Resistance
Good
Poor
Alcohols
—
Fair
Hydrolysis
—
Poor
Sustainability
Recyclability
Limited (composite)
Industrially compostable
Recycling Code
1 (PET)
7
Carbon Footprint
Moderate to High
~1.6 kg CO₂e / kg
Bio-based Content
—
100 %