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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 m2/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