Current material data (confirm against the selected grade before ordering)
| Property | Current value |
|---|---|
| Molded density | 30–50 kg/m³ |
| Compression stress at 10% | 20–30 kPa |
| Long-term service temperature | 65 °C |
| Short-term dimensional stability temperature | 85 °C |
| Cold-use boundary | −40 °C |
| Thermal conductivity | 0.04 W/(m·K) |
| Rebound | 37% |
| Hardness | 15–25 Asker-C |
Cross-linked EVA is a closed-cell ethylene-vinyl acetate foam, made as foam blocks or sheets and then cut or compression molded into parts. Among the softer, more conformable foams we work with: 205–243% elongation at break (ISO 7214), the highest of the foams we mold in production. Choose EVA where the foam has to hug a curved surface, seal a gap, or be squeezed thousands of times and still recover: gaskets, liners, hand-contact surfaces, sports and medical parts. Water absorption stays under 1%.
Property comparison· click a grade to highlight
| Property | EV30 | EV50 | Test method |
|---|---|---|---|
| Nominal density (g/L) | 30 | 50 | ISO 7214:2012 |
| Average cell diameter (mm) | 0.4 | 0.4 | — |
| Compression stress (kPa) | ISO 7214:2012 | ||
| @ 25% strain | 39 | 50 | |
| @ 50% strain | 100 | 116 | |
| Tensile strength (kPa) | 520 | 749 | ISO 7214:2012 |
| Elongation at break (%) | 205 | 243 | ISO 7214:2012 |
| Compression set, 50% / 22 h (%) | ISO 7214:2012 | ||
| after 0.5 h recovery | 13 | 9 | |
| after 24 h recovery | 4 | 2 | |
| Tear strength (kN/m) | 1.675 | 2.880 | ISO 8067 Method B |
| Hardness (Shore OO) | 40 | 46 | ISO 868:2003 |
| Recommended max service temp (°C) | 65 | 65 | — |
| Water absorption (%) | <1 | <1 | ISO 2896:2001 |
Grade selection guide
Conforming liners · soft-touch surfaces · light sealing
EV30 · 30 g/L39 kPa @25% · Shore OO 40The softer of the two: it takes the shape of what it wraps.
Repeated-use gaskets · straps · load-bearing pads
EV50 · 50 g/L50 kPa @25% · 2.880 kN/m tearStronger, tougher, and recovers to within 2% after 24 h.
The table below puts the key properties of these materials side by side. Tell us the load, temperature and handling your part sees, and DBM will settle the material and density with you.
| Property | EPP | EPO | Beaded EPE | EVA |
|---|---|---|---|---|
| Structure | Molded PP bead foam | PS/polyolefin composite bead foam | Molded PE bead foam | Cross-linked closed-cell EVA |
| Density range | 20–66 kg/m³ | 16–33 kg/m³ | 20–74 kg/m³ | 30–50 kg/m³ |
| Compression stress @25% | 80–395 kPa | 120–190 kPa | 60.7–296.5 kPa | 39–50 kPa |
| Tensile strength | 420–1350 kPa | 280–530 kPa | 275.8–827.4 kPa | 520–749 kPa |
| Elongation at break | ≥15% | 7.6–9.7% | 22–38% | 205–243% |
| Thermal conductivity | ≈0.036–0.042 W/(m·K) | 0.037–0.039 W/(m·K) | 0.0346–0.0433 W/(m·K) | 0.04 W/(m·K) |
| Service temperature | ≈ up to 100°C | 80°C automotive evaluation | max 80°C | max 65°C recommended |
| Water absorption | ≤8% | on request | <5 vol.% | <1% |
| Character | Tough, repeat-impact, reusable; the workhorse | Stiffer support with impact resistance | Flexible, water-resistant, widest density span | Soft, high elongation, conforms and rebounds |
Compare in detail: EVA vs EPP foam