Comparison
Urea-Formaldehyde UV Stable vs PEEK
A side-by-side comparison of Urea-Formaldehyde Resin and Polyether Ether Ketone.
Physical
Density
1.45-1.55 g/cm³
1.32 g/cm³
Water Absorption (24h)
1.5-3.0 %
0.15 %
Transparency
Clear to Off-White
Opaque (amber)
Shrinkage
5-8 %
1.1 – 1.4 %
Mechanical
Young's Modulus
6-12 GPa
3.6 GPa
Tensile Strength
50-80 MPa
100 MPa
Elongation at Break
0.5-2.0 %
50 %
Impact Strength (Izod)
3-8 J/m
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
Undetermined (Degradation)
143 °C
Melting Point
N/A
343 °C
Continuous Service Temperature
60-100 °C
260 °C
Heat Deflection Temperature
40-80 °C
160 °C
Electrical
Dielectric Constant
5.5-7.0
3.2
Volume Resistivity
10^8-10^11 Ohm-cm
10¹⁶ Ω·cm
Dielectric Strength
9-15 kV/mm
—
Chemical resistance
Acids
Poor resistance
Excellent
Bases
Poor resistance
Excellent
Solvents
Resistant to hydrocarbons, swells in polar solvents
Excellent
UV Resistance
Poor
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Difficult
Recyclable (specialty)
Recycling Code
N/A
7
Carbon Footprint
Low to Moderate (Formaldehyde concerns)
~30 kg CO₂e / kg