HALAR ECTFE vs ETFE Performance Comparison
Advantages of ETFE fluoropolymer compared with other coating materials:
- It is mainly applied by electrostatic spray coating method.
- Fluidizedbed technology can also be adopted.
- Coatings ranging from 0.125 mm to more than 2 mm can be obtained via electrostatic spray coating.
- The coating is tough, featuring excellent wear resistance, flexibility and outstanding impact resistance.
- Superior chemical resistance – resistant to damage from strong acids, strong alkalis and other inorganic substances.
- Desirable anti-stick property.
The table below shows the merged detailed performance comparison between Halar ECTFE and ETFE:
| Performance Index | HALAR ECTFE | ETFE |
| Specific Gravity | 1.68 | 1.70‑1.75 |
| Maximum Continuous Operating Temperature (℃) | 150 | 150 |
| Curing Oven Temperature (℃) | 260‑290 | 280‑320 |
| Coefficient of Thermal Expansion (10⁻⁵/℃) | 8 | 10 |
| Flexural Modulus (22℃, ASTM D‑790, MPa) | 1690 | 900‑1200 |
| Tensile Modulus (22℃, ASTM D‑638, MPa) | 1655 | 490‑1300 |
| Yield Strength (22℃, ASTM D‑638, MPa) | 36 | 14‑22 |
| Tensile Breaking Strength (22℃, ASTM D‑638, MPa) | 48 | 39‑43 |
| Hardness (Rockwell-Pencil Scratch) | R93‑4B | R50‑6B |
| Hardness (Shore Hardness) | D75 | D67 |
| Izod Notched Impact Strength (25℃, J/m) | No Break | No Break |
| Low-temperature Flexibility Temperature (℃) | -76 | -100 |
| Flammability Rating | UL94 V‑O | UL94 V‑O |
| Limiting Oxygen Index (%) | 64 | 30 |
| Volume Resistivity (ASTM D‑257, ohm·cm) | 10¹⁶ | 10¹⁷ |
| Dielectric Constant (1 kHz) | 2.5 | 2.6 |
| Dielectric Constant (1 MHz) | 2.5 | 2.6 |
| Dielectric Constant (60 Hz) | 2.6 | 2.6 |
| Dielectric Strength (3 mm Thickness, kV/mm) | 14.5 | 14.5 |
| Dissipation Factor (1 kHz) | 0.002 | 0.0008 |
| Dissipation Factor (1 MHz) | 0.009 | 0.005 |
| Dissipation Factor (60 Hz) | 0.0009 | 0.0007 |
| Water Absorption Rate (%) | <0.01 | 0.03 |
| Gas Permeability @25℃ [(cm³(STP)·mm/m²·atm·24h) ×10⁻²] Oxygen (O₂) Hydrogen (H₂) Water Vapor (H₂O) |
0.2 0.1 7.5 |
0.7 0.2 98 |
| Liquid Permeability @50℃ (g·mm/m²·24h) Hydrochloric Acid (HCl) Methanol Water (H₂O) |
0.5 0.3 0.5 |
1.7 12 1.6 |
Notes
- Halar ECTFE achieves UL 94 V-O flame retardant rating at a coating thickness of only 0.18 mm, while ETFE requires a thickness of 1.6 mm to reach the same rating. This proves that Halar ECTFE delivers superior flame retardant performance than ETFE at the same coating thickness.
- The limiting oxygen index (LOI) is a key indicator for evaluating flame retardancy. A higher LOI value indicates slower flame propagation speed and lower smoke generation during combustion.