Comparison

CAB Injection Molding Grade L vs PETG

A side-by-side comparison of Cellulose Acetate Butyrate, Injection Molding Grade L and Polyethylene Terephthalate Glycol.

Physical

Density
1.20 g/cm³
1.27 g/cm³
Water Absorption (24h)
1.0 %
0.13 %
Transparency
Good
Transparent
Shrinkage
0.8 - 1.8 %
0.2 – 0.5 %

Mechanical

Young's Modulus
1.8 GPa
2.1 GPa
Tensile Strength
35 MPa
50 MPa
Elongation at Break
20.0 %
120 %
Impact Strength (Izod)
1.0 J/cm
100 J/m
Flexural Strength
70 MPa

Thermal

Glass Transition Temperature
80-100 °C
80 °C
Melting Point
None (degrades)
Continuous Service Temperature
50 °C
65 °C
Heat Deflection Temperature
50 °C
70 °C
CTE
68 × 10⁻⁶ /K

Electrical

Dielectric Constant
3.3
3.3
Volume Resistivity
10¹¹ Ω·cm
10¹⁴ Ω·cm
Dielectric Strength
16 kV/mm

Chemical resistance

Acids
Poor resistance
Good
Bases
Poor resistance
Fair
Solvents
Soluble in esters, ketones, and chlorinated hydrocarbons
UV Resistance
Good
Fair
Alcohols
Good
Oils
Good

Sustainability

Recyclability
Recyclable (often downcycled)
Recyclable
Recycling Code
7 (Other)
1
Carbon Footprint
Moderate
~2.7 kg CO₂e / kg
Bio-based Content
0 %