Comparison
Dental SLA Resin vs PETG
A side-by-side comparison of Biocompatible Photopolymer Resin for Dental Applications (SLA) and Polyethylene Terephthalate Glycol.
Physical
Density
1.15-1.25 g/cm³
1.27 g/cm³
Water Absorption (24h)
0.2-0.5 %
0.13 %
Transparency
Clear to Translucent to Opaque
Transparent
Shrinkage
Low (0.5-1.5%)
0.2 – 0.5 %
Mechanical
Young's Modulus
2.0-3.0 GPa
2.1 GPa
Tensile Strength
40-55 MPa
50 MPa
Elongation at Break
3-8 %
120 %
Impact Strength (Izod)
2-4 kJ/m²
100 J/m
Flexural Strength
—
70 MPa
Thermal
Glass Transition Temperature
50-65 °C
80 °C
Melting Point
N/A (cross-linked polymer)
—
Continuous Service Temperature
45-60 °C
65 °C
Heat Deflection Temperature
50-60 °C @ 0.45 MPa
70 °C
CTE
—
68 × 10⁻⁶ /K
Electrical
Dielectric Constant
3.0-3.5
3.3
Volume Resistivity
10¹²-10¹⁴ Ω·cm
10¹⁴ Ω·cm
Dielectric Strength
15-20 MV/m
—
Chemical resistance
Acids
Fair resistance
Good
Bases
Poor resistance
Fair
Solvents
Resistant to common dental disinfectants. Attacked by strong solvents.
—
UV Resistance
Fair
Fair
Alcohols
—
Good
Oils
—
Good
Sustainability
Recyclability
Not Recyclable
Recyclable
Recycling Code
N/A
1
Carbon Footprint
High
~2.7 kg CO₂e / kg
Bio-based Content
—
0 %