EPEBA is expanded polyether block amide (PEBA), a thermoplastic elastomer bead foam steam-molded within a narrow window. 70% rebound in the current comparison dataset, at 20–30% less weight than TPU for the same stack height. It stays elastic when EVA goes stiff in the cold, and takes millions of flex cycles without measurable decay. It is also the most demanding one to mold, and DBM molds it.
Current material data (confirm against the selected grade before ordering)
| Property | Current value |
|---|---|
| Molded density | 100–350 kg/m³ |
| Compression stress at 10% | 50–800 kPa |
| Long-term service temperature | 80 °C |
| Short-term dimensional stability temperature | 100 °C |
| Cold-use boundary | −40 °C |
| Thermal conductivity | 0.04–0.045 W/(m·K) |
| Rebound | 70% |
| Hardness | 38 Asker-C |
| Property | Value |
|---|---|
| Foam density | 100–350 kg/m³ |
| Energy return | 70% in the current comparison dataset |
| Weight advantage | 20–30% lighter than TPU at the same stack height |
| Hardness | Asker-C 38 — close to ETPU |
| Cold behaviour | Stays elastic where EVA stiffens |
| Fatigue | Millions of flex cycles with no significant structural decay |
| Structure | Block copolymer — rigid polyamide segments with flexible polyether segments, very low hysteresis loss |
| Foaming route | Supercritical CO₂ / N₂ saturation, then rapid pressure release |
| Tensile / tear / conductivity / service temperature | Provided with your enquiry |
Elite marathon racing midsoles
Where energy return decides the product.
Lightweight high-rebound protective gear
Return and weight together, without the TPU penalty.
Why we can run it
The most process-demanding elastomer here, and DBM molds it. The figures above are for the molded foam.