Comparison
rPET Bottle Blue vs PA66
A side-by-side comparison of Recycled Polyethylene Terephthalate Bottle Grade Blue and Polyamide 6,6 (Nylon).
Physical
Density
1.38-1.40 g/cm³
1.14 g/cm³
Water Absorption (24h)
0.1-0.3 %
1.2 %
Transparency
Excellent (for blue PET)
Opaque
Shrinkage
1.5-2.5 %
1.5 – 2.0 %
Mechanical
Young's Modulus
2.5-3.5 GPa
3.0 GPa (dry)
Tensile Strength
50-70 MPa
80 MPa
Elongation at Break
20-50 %
60 %
Impact Strength (Izod)
5-10 J/m
50 J/m
Flexural Strength
—
110 MPa
Thermal
Glass Transition Temperature
70-80 °C
70 °C
Melting Point
250-260 °C
255 – 265 °C
Continuous Service Temperature
70-80 °C
100 – 120 °C
Heat Deflection Temperature
50-60 °C (0.45 MPa)
75 °C (unfilled)
Electrical
Dielectric Constant
3.0-3.2
4.0
Volume Resistivity
10^12-10^14 Ohm·cm
10¹² Ω·cm
Dielectric Strength
15-20 kV/mm
—
Chemical resistance
Acids
Good resistance to dilute acids
Poor
Bases
Poor resistance to strong bases
Good
Solvents
Resistant to most organic solvents
—
UV Resistance
Moderate (can yellow over time)
Fair
Alcohols
—
Good
Oils & Fuels
—
Excellent
Sustainability
Recyclability
Highly Recyclable
Recyclable
Recycling Code
1 (PET)
7
Carbon Footprint
Significantly lower than virgin PET
~7.4 kg CO₂e / kg
Bio-based Content
—
0 – 100 % (bio grades)