Pre-oxidized Fiber Felt (PAN pre-oxidized felt) is a needle-punched nonwoven material made from stabilized polyacrylonitrile (PAN) fiber. It is a high-performance, quasi-noncombustible material with excellent flame resistance. When exposed to an open flame, it carbonizes without melting, dripping, or showing obvious thermal shrinkage. The continuous working temperature is 250–350℃, and it can withstand extreme short-term thermal shock. It is flexible and easy to cut, with low thermal conductivity, providing reliable thermal and flame-barrier performance. Compared with Nomex felt, it offers better flame retardancy at a competitive cost. Common applications include EV battery fire insulation, welding-splash protection, industrial high-temperature barriers, and flame-retardant cushioning.
Product name: | Pre-oxidized fiber felt |
Material: | 100% pre-oxidized PAN fiber |
Weight: | 100–2000 g/m² |
Thickness: | 1–10 mm, or custom |
Width: | 1 m, 1.5 m, 2 m, or custom |
LOI (Limiting Oxygen Index): | ≥ 40% |
Continuous operating temperature: | 250–350℃ |
Instantaneous maximum temperature: | Up to 1000℃ |
Thermal conductivity: | ≤ 0.035 W/(m·K) |
Thermal shrinkage: | ≤3% (at 250℃) |
Fire rating: | GB 8624 A2-s1,d0 / UL94-V0 |
Chemical properties: | Stable under weak/medium strong acids and alkaline mist at high temperature |
Features
1. Excellent flame retardancy; quasi-noncombustible; no molten droplets when exposed to fire.
2. Good thermal insulation with stable performance under continuous high-temperature conditions.
3. Soft texture; easy cutting, punching, and composite processing.
4. Corrosion resistance, stable chemical properties, and long service life.
5. Low thermal conductivity; lightweight and suitable for filling applications.
