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.
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Product name: |
Pre-oxidized fiber felt |
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Material: |
100% pre-oxidized PAN fiber |
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Weight: |
100–2000 g/m² |
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Thickness: |
1–10 mm, or custom |
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Width: |
1 m, 1.5 m, 2 m, or custom |
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LOI (Limiting Oxygen Index): |
≥
40% |
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Continuous operating temperature: |
250–350℃ |
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Instantaneous maximum temperature: |
Up to 1000℃ |
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Thermal conductivity: |
≤
0.035 W/(m·K) |
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Thermal shrinkage: |
≤3% (at 250℃) |
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Fire rating: |
GB 8624 A2-s1,d0 / UL94-V0 |
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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.
