Comparison
EVOH 32 mol% Barrier vs PETG
A side-by-side comparison of Ethylene Vinyl Alcohol Copolymer (32 mol% VA) for Barrier Applications and Polyethylene Terephthalate Glycol.
Physical
Density
1.18-1.22 g/cm³
1.27 g/cm³
Water Absorption (24h)
3-5 % (highly hygroscopic)
0.13 %
Transparency
Good
Transparent
Shrinkage
1-3 %
0.2 – 0.5 %
Mechanical
Young's Modulus
1.5-2.5 GPa
2.1 GPa
Tensile Strength
40-55 MPa
50 MPa
Elongation at Break
15-30 %
120 %
Impact Strength (Izod)
50-100 J/m
100 J/m
Flexural Strength
—
70 MPa
Thermal
Glass Transition Temperature
50-60 °C
80 °C
Melting Point
165-175 °C
—
Continuous Service Temperature
50-60 °C
65 °C
Heat Deflection Temperature
50-60 °C
70 °C
CTE
—
68 × 10⁻⁶ /K
Electrical
Dielectric Constant
3.5-4.5
3.3
Volume Resistivity
10¹⁰-10¹² Ω⋅cm
10¹⁴ Ω·cm
Dielectric Strength
15-25 kV/mm
—
Chemical resistance
Acids
Good resistance
Good
Bases
Good resistance
Fair
Solvents
Insoluble in most common solvents, but sensitive to moisture
—
UV Resistance
Poor
Fair
Alcohols
—
Good
Oils
—
Good
Sustainability
Recyclability
Challenging due to multilayer structures
Recyclable
Recycling Code
Depends on multilayer
1
Carbon Footprint
Moderate
~2.7 kg CO₂e / kg
Bio-based Content
—
0 %