Comparison
CAB Injection Molding Grade L vs PEEK
A side-by-side comparison of Cellulose Acetate Butyrate, Injection Molding Grade L and Polyether Ether Ketone.
Physical
Density
1.20 g/cm³
1.32 g/cm³
Water Absorption (24h)
1.0 %
0.15 %
Transparency
Good
Opaque (amber)
Shrinkage
0.8 - 1.8 %
1.1 – 1.4 %
Mechanical
Young's Modulus
1.8 GPa
3.6 GPa
Tensile Strength
35 MPa
100 MPa
Elongation at Break
20.0 %
50 %
Impact Strength (Izod)
1.0 J/cm
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
80-100 °C
143 °C
Melting Point
None (degrades)
343 °C
Continuous Service Temperature
50 °C
260 °C
Heat Deflection Temperature
50 °C
160 °C
Electrical
Dielectric Constant
3.3
3.2
Volume Resistivity
10¹¹ Ω·cm
10¹⁶ Ω·cm
Dielectric Strength
16 kV/mm
—
Chemical resistance
Acids
Poor resistance
Excellent
Bases
Poor resistance
Excellent
Solvents
Soluble in esters, ketones, and chlorinated hydrocarbons
Excellent
UV Resistance
Good
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Recyclable (often downcycled)
Recyclable (specialty)
Recycling Code
7 (Other)
7
Carbon Footprint
Moderate
~30 kg CO₂e / kg