Standard EVA degrades when exposed to oils, sweat, and disinfectants. EVA-3 does not. It is now the material of choice for prosthetic liners and diabetic insoles. Its closed-cell structure prevents bacterial ingress, and its low compression set means a prosthetic foot retains its shape after 2 million steps.
| Grade | VA content | Melting point | Typical use | |-------|------------|---------------|--------------| | EVA-1 | 12% | 95°C | Heavy-duty bags | | EVA-2 | 18% | 88°C | Wire coating, tubing | | EVA-3 | 28-33% | 68°C | Solar panels, adhesives | | EVA-4 | 40% | 50°C (amorphous) | Pressure-sensitive adhesives | Standard EVA degrades when exposed to oils, sweat,
To understand why industry is moving toward EVA-3, one must look at the data sheet. Here are the benchmark properties: Standard EVA degrades when exposed to oils, sweat,
Most impressively, EVA-3 exhibits anti-microbial properties due to the nano-clay surface energy, which prevents biofilm formation without requiring silver additives. Standard EVA degrades when exposed to oils, sweat,