Comparison
PHA Biocompatible vs PETG
A side-by-side comparison of Polyhydroxyalkanoate, Biocompatible Grade HH and Polyethylene Terephthalate Glycol.
Physical
Density
1.22 g/cm³
1.27 g/cm³
Water Absorption (24h)
0.8 %
0.13 %
Transparency
Moderate
Transparent
Shrinkage
2.0 - 4.5 %
0.2 – 0.5 %
Mechanical
Young's Modulus
0.6 GPa
2.1 GPa
Tensile Strength
35 MPa
50 MPa
Elongation at Break
5.0 %
120 %
Impact Strength (Izod)
1.0 J/cm
100 J/m
Flexural Strength
—
70 MPa
Thermal
Glass Transition Temperature
-3 °C
80 °C
Melting Point
110-120 °C
—
Continuous Service Temperature
40 °C
65 °C
Heat Deflection Temperature
35 °C
70 °C
CTE
—
68 × 10⁻⁶ /K
Electrical
Dielectric Constant
3.0
3.3
Volume Resistivity
10¹¹ Ω·cm
10¹⁴ Ω·cm
Dielectric Strength
15 kV/mm
—
Chemical resistance
Acids
Good resistance
Good
Bases
Good resistance
Fair
Solvents
Resistant to aliphatic hydrocarbons, but attacked by chlorinated and aromatic hydrocarbons
—
UV Resistance
Moderate
Fair
Alcohols
—
Good
Oils
—
Good
Sustainability
Recyclability
Biodegradable (compost, medical applications)
Recyclable
Recycling Code
7 (Other)
1
Carbon Footprint
Low
~2.7 kg CO₂e / kg
Bio-based Content
—
0 %