Ethylene Vinyl Acetate (EVA)
EVA is a thermoplastic, further classified as an ethylene copolymer. It can have a moderately low tensile strength among thermoplastics. In addition, it can have a fairly high ductility and a moderately low density.
The properties of EVA include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare EVA to: ethylene copolymers (top), all thermoplastics (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
0.015 to 0.080 GPa 0.0022 to 0.012 x 106 psi
Elongation at Break
300 to 800 %
Tensile Strength: Ultimate (UTS)
3.0 to 35 MPa 0.44 to 5.1 x 103 psi
Thermal Properties
Maximum Temperature: Decomposition
450 °C 840 °F
Melting Onset (Solidus)
55 to 95 °C 130 to 200 °F
Specific Heat Capacity
1400 J/kg-K 0.33 BTU/lb-°F
Thermal Conductivity
0.34 W/m-K 0.2 BTU/h-ft-°F
Vicat Softening Temperature
45 to 80 °C 110 to 180 °F
Other Material Properties
Density
0.93 to 1.0 g/cm3 58 to 60 lb/ft3
Dielectric Constant (Relative Permittivity) At 1 Hz
2.8
Dielectric Strength (Breakdown Potential)
21 kV/mm 0.82 V/mil
Common Calculations
Stiffness to Weight: Axial
0.0087 to 0.048 points
Stiffness to Weight: Bending
8.6 to 15 points
Strength to Weight: Axial
0.87 to 10 points
Strength to Weight: Bending
4.8 to 26 points
Thermal Diffusivity
0.25 to 0.26 mm2/s
Followup Questions
Further Reading
Handbook of Vinyl Formulating, 2nd ed., Richard F. Grossman (editor), 2008
SPI Plastics Engineering Handbook of the Society of the Plastics Industry, Inc., 5th ed., Michael L. Berins (editor), 2000
Modern Plastics Handbook, Charles A. Harper (editor), 1999
Plastics Materials, 7th ed., J. A. Brydson, 1999
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015