Comparison
EVOH 44 mol% Barrier vs PA66
A side-by-side comparison of Ethylene Vinyl Alcohol Copolymer (44 mol% VA) for Barrier Applications and Polyamide 6,6 (Nylon).
Physical
Density
1.18-1.22 g/cm³
1.14 g/cm³
Water Absorption (24h)
4-6 % (highly hygroscopic)
1.2 %
Transparency
Good
Opaque
Shrinkage
1-3 %
1.5 – 2.0 %
Mechanical
Young's Modulus
1.5-2.5 GPa
3.0 GPa (dry)
Tensile Strength
40-55 MPa
80 MPa
Elongation at Break
15-30 %
60 %
Impact Strength (Izod)
50-100 J/m
50 J/m
Flexural Strength
—
110 MPa
Thermal
Glass Transition Temperature
45-55 °C
70 °C
Melting Point
170-180 °C
255 – 265 °C
Continuous Service Temperature
50-60 °C
100 – 120 °C
Heat Deflection Temperature
50-60 °C
75 °C (unfilled)
Electrical
Dielectric Constant
3.5-4.5
4.0
Volume Resistivity
10¹⁰-10¹² Ω⋅cm
10¹² Ω·cm
Dielectric Strength
15-25 kV/mm
—
Chemical resistance
Acids
Good resistance
Poor
Bases
Good resistance
Good
Solvents
Insoluble in most common solvents, but sensitive to moisture
—
UV Resistance
Poor
Fair
Alcohols
—
Good
Oils & Fuels
—
Excellent
Sustainability
Recyclability
Challenging due to multilayer structures
Recyclable
Recycling Code
Depends on multilayer
7
Carbon Footprint
Moderate
~7.4 kg CO₂e / kg
Bio-based Content
—
0 – 100 % (bio grades)