Material Comparison
Compare verified engineering materials side by side with condition-specific mechanical properties.
| Parameter | Polyether Polyurethane (EU) | Ethylene Propylene Diene Rubber (EPDM) |
|---|---|---|
| Material Family | Rubber & Elastomers | Rubber & Elastomers |
| Subfamily | Polyurethane Elastomers | Weathering & Chemical Resistant Elastomers |
| ASTM Designation | EU | EPDM |
| ISO Designation | EU | EPDM |
| ASTM-D2000 Designation | Type BG (EU) | Type BA / CA |
| Element | Polyether Polyurethane (EU) | Ethylene Propylene Diene Rubber (EPDM) |
|---|
| Mechanical Parameter | Polyether Polyurethane (EU)Cast PTMEG-Based Polyether Vulcanizate (Post-Cured 16h at 100°C, 90 Shore A) | Ethylene Propylene Diene Rubber (EPDM)Peroxide-Cured High-Temperature Compound |
|---|---|---|
| Compression Set (22h at 70°C) · Cast PTMEG-Based Polyether Vulcanizate (Post-Cured 16h at 100°C, 90 Shore A) · RANGE · 70 °CUnit: % | 22–38 % | — % |
| Compression Set (22h at 100°C) · Peroxide-Cured High-Temperature Compound · RANGE · 100 °CUnit: % | — % | 15–30 % |
| Hardness Scale | Polyether Polyurethane (EU) | Ethylene Propylene Diene Rubber (EPDM) |
|---|---|---|
| SHORE_A Hardness · Cast PTMEG-Based Polyether Vulcanizate (Post-Cured 16h at 100°C, 90 Shore A) · RANGE | 60–95 SHORE_A | — |
Machinability: Lathe turned with sharp ground high-speed steel tools; cryogenically machined with liquid nitrogen for complex seals.
Formability / Cold Working: Processed via two-component liquid casting or thermoplastic polyurethane (TPU) extrusion and injection molding with vacuum degassing.
Heat Treatment & Annealing: Post-cured in hot-air ovens at 100°C for 16 to 24 hours to achieve maximum mechanical property development.
Machinability: Cryogenically machined; waterjet cut without abrasive garnets for pure elastomer gaskets.
Formability / Cold Working: Readily compounded in internal mixers with high paraffinic oil and carbon black loading. Extruded into dense and sponge weatherstrip profiles with continuous microwave/hot-air vulcanization (HAV) lines; precision injection molded.
Heat Treatment & Annealing: Vulcanized via sulfur-accelerator systems for rapid extrusion cure or organic peroxide systems (dicumyl peroxide, DTBP) for superior compression set, heat resistance up to 150°C, and steam resistance.