Comparison
Casein Bioplastic vs PA66
A side-by-side comparison of Casein, Bioplastic Grade U and Polyamide 6,6 (Nylon).
Physical
Density
1.30-1.40 g/cm³
1.14 g/cm³
Water Absorption (24h)
3.0-6.0 %
1.2 %
Transparency
Opaque
Opaque
Shrinkage
2.0 - 4.0 %
1.5 – 2.0 %
Mechanical
Young's Modulus
2.0-3.0 GPa
3.0 GPa (dry)
Tensile Strength
25-40 MPa
80 MPa
Elongation at Break
3.0 %
60 %
Impact Strength (Izod)
0.1 J/cm
50 J/m
Flexural Strength
—
110 MPa
Thermal
Glass Transition Temperature
70-90 °C
70 °C
Melting Point
None (degrades)
255 – 265 °C
Continuous Service Temperature
50 °C
100 – 120 °C
Heat Deflection Temperature
45 °C
75 °C (unfilled)
Electrical
Dielectric Constant
5.5
4.0
Volume Resistivity
10⁸ Ω·cm
10¹² Ω·cm
Dielectric Strength
10 kV/mm
—
Chemical resistance
Acids
Sensitive
Poor
Bases
Sensitive
Good
Solvents
Insoluble in water, but sensitive to moisture; soluble in alkaline solutions
—
UV Resistance
Poor
Fair
Alcohols
—
Good
Oils & Fuels
—
Excellent
Sustainability
Recyclability
Biodegradable (compost)
Recyclable
Recycling Code
7 (Other)
7
Carbon Footprint
Low (utilizes dairy byproduct)
~7.4 kg CO₂e / kg
Bio-based Content
—
0 – 100 % (bio grades)