Conventional ester foams
Description
Conventional ester foams are polyester foams in specific grades with varying levels of density and hardness. They combine a high degree of hysteresis with low elasticity, and therefore provide good shock absorption. Some of these foams are suitable for edge welding.
Foam grades
S 253
Protecting
| Typical applications | Shoe comfort layer |
| Density ISO 845 (kg/m³) | 22-24 |
| CLD 40% ISO 3386 (kPa) | 3.5-4.5 |
| Tensile strength ISO 1798 (kPa) | >150 |
| Elongation ISO 1798 (%) | >200 |
| Tear resistance ASTM D3574/R (N/cm) | <10 |
| Cell size Visiocell (µm) | 600 (tv) |
S 259
Protecting
| Typical applications | Shoe comfort layer |
| Density ISO 845 (kg/m³) | 22-24 |
| CLD 40% ISO 3386 (kPa) | 6.8-8.2 |
| Tensile strength ISO 1798 (kPa) | >150 |
| Elongation ISO 1798 (%) | >120 |
| Tear resistance ASTM D3574/R (N/cm) | <20 |
| Cell size Visiocell (µm) | - |
S 273
Protecting
| Typical applications | Shoe comfort layer |
| Density ISO 845 (kg/m³) | 23-26 |
| CLD 40% ISO 3386 (kPa) | 3.4-4.2 |
| Tensile strength ISO 1798 (kPa) | 200 |
| Elongation ISO 1798 (%) | >200 |
| Tear resistance ASTM D3574/R (N/cm) | <10 |
| Cell size Visiocell (µm) | 490 (tv) |
S 275
Protecting
| Typical applications | Shoe comfort layer |
| Density ISO 845 (kg/m³) | 24-26 |
| CLD 40% ISO 3386 (kPa) | 4.3-5.7 |
| Tensile strength ISO 1798 (kPa) | >150 |
| Elongation ISO 1798 (%) | >150 |
| Tear resistance ASTM D3574/R (N/cm) | <10 |
| Cell size Visiocell (µm) | - |
S 291 EW
Protecting
| Typical applications | Masking tape |
| Density ISO 845 (kg/m³) | 24-28.5 |
| CLD 40% ISO 3386 (kPa) | 2.5-4.5 |
| Tensile strength ISO 1798 (kPa) | >250 |
| Elongation ISO 1798 (%) | >50 |
| Tear resistance ASTM D3574/R (N/cm) | |
| Cell size Visiocell (µm) | 500-700 |
