Comparison
rPET Bottle Blue vs PEEK
A side-by-side comparison of Recycled Polyethylene Terephthalate Bottle Grade Blue and Polyether Ether Ketone.
Physical
Density
1.38-1.40 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.1-0.3 %
0.15 %
Transparency
Excellent (for blue PET)
Opaque (amber)
Shrinkage
1.5-2.5 %
1.1 – 1.4 %
Mechanical
Young's Modulus
2.5-3.5 GPa
3.6 GPa
Tensile Strength
50-70 MPa
100 MPa
Elongation at Break
20-50 %
50 %
Impact Strength (Izod)
5-10 J/m
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
70-80 °C
143 °C
Melting Point
250-260 °C
343 °C
Continuous Service Temperature
70-80 °C
260 °C
Heat Deflection Temperature
50-60 °C (0.45 MPa)
160 °C
Electrical
Dielectric Constant
3.0-3.2
3.2
Volume Resistivity
10^12-10^14 Ohm·cm
10¹⁶ Ω·cm
Dielectric Strength
15-20 kV/mm
—
Chemical resistance
Acids
Good resistance to dilute acids
Excellent
Bases
Poor resistance to strong bases
Excellent
Solvents
Resistant to most organic solvents
Excellent
UV Resistance
Moderate (can yellow over time)
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Highly Recyclable
Recyclable (specialty)
Recycling Code
1 (PET)
7
Carbon Footprint
Significantly lower than virgin PET
~30 kg CO₂e / kg