What Is Pre-Oxidized Pan and Meta-Aramid Blended Felt?
This high-performance composite material is produced by physically blending two heat-resistant organic fibers and processing them through needle-punching or hydroentangling techniques. It combines the exceptional flame retardancy of pre-oxidized fiber with the thermal stability of meta-aramid (such as aramid 1313), making it ideal for high-temperature protection and thermal insulation applications.
Manufacturing Process of Fireproof Felt
Raw Material Pre-Treatment
Pre-oxidized fiber preparation: PAN (polyacrylonitrile) fibers are thermally stabilized in an air atmosphere at 200–300°C to create partially cyclized black fibers with a density of approximately 1.40 g/cm³. These fibers offer an exceptional limiting oxygen index (LOI) of 40–60 and a decomposition temperature ≥ 640°C.
Meta-aramid processing: Aramid 1313 fibers are spun into yarns. They offer thermal resistance above 300°C, high tensile strength, and low thermal shrinkage.
Blending and FormingFiber blending: Short fibers of pre-oxidized PAN and meta-aramid are mixed at a 70:30 ratio, then formed into felt via needle punching or hydroentanglement.
Composite enhancement (optional): Aerogel powders may be incorporated into the felt structure to significantly enhance thermal insulation performance.
Post-Treatment Heat-setting and coatings: Layers are bonded using polyimide adhesives, and optional PTFE (polytetrafluoroethylene) surface treatments are applied to improve chemical resistance and durability.
Pre-Oxidized Pan and Meta-Aramid Blended Felt Performance Characteristics
- Flame Retardancy & Thermal Resistance: LOI up to 40–60, decomposition temperature ≥ 640°C. Stable under short-term exposure to 1200°C Meta-aramid content ensures no melting or dripping—only carbonization under heat.
Thermal Insulation Ultra-low thermal conductivity: 0.017–0.023 W/(m·K), Outperforms conventional inorganic insulation in compact spaces.
- Mechanical Strength: Pre-oxidized fiber contributes tensile strength (approx. 1.4 cN/dtex) Meta-aramid boosts tear resistance and flexibility Thermal shrinkage rate ≤ 3%.
- Chemical & Environmental: Durability Resistant to acids, alkalis, and organic solvents PTFE coating resists surface fouling and corrosion Service life is 8–10 times longer than conventional materials.
Pre-Oxidized Pan and Meta-Aramid Blended Felt Technical Parameters
| Parameter Category |
Technical Specifications |
| Areal Density (GSM) |
400 g/m² |
Width
|
1.0–2.5 m (customizable) |
| Thickness |
3mm |
| Longitudinal Tensile Strength |
≥180 N/50mm (warp) |
| Transverse Tensile Strength |
≥150 N/50mm (weft) |
| Elongation at Break |
≤10% |
| Tear Strength |
≥25 N |
| Limiting Oxygen Index |
≥45% |
Long-term Service Temperature
|
≤450°C (continuous)
|
Short-term High-Temperature Resistance
|
≤1200°C (instantaneous, ≤30 seconds)
|
Thermal Conductivity
|
0.020–0.025 W/(m·K)
|
Thermal Shrinkage (300°C/2h
|
≤2%
|
Flame Rating
|
UL94-V0
|
Smoke Density (NBS Method)
|
≤50 (flaming combustion)
|
Toxic Gas Emission
|
Halogen-free, cyanide-free, compliant with RoHS/REACH
|
Applications in Fire Safety, Battery Protection, and Industry
- Thermal Protection & Fire Safety：Firefighter suits, glove linings, thermal blankets, fire-resistant curtains.
- Batteries & New Energy: Thermal insulation for lithium-ion battery packsm,fire barriers for thermal runaway prevention,safety layers for energy storage modules.
- Building Fire Protection: Pipe wraps, intumescent seals, rooftop insulation, fireproof door cores.
- Industrial High-Temperature Applications: Pipe insulation covers, reactor jackets, high-temp equipment shields (e.g., welding curtains).
- Defense & Aerospace: Impact absorption pads, thermal protection systems for aircraft and spacecraft.
Why Choose Our Pre-Oxidized & Meta-Aramid Felt?
Compared with fiberglass or ceramic insulation, our fireproof felt offers enhanced flexibility, superior thermal performance, and better durability in chemically harsh environments. It is lightweight, easy to handle, and highly customizable for both large-scale industrial use and compact engineering applications.
