Preoxidized PAN Chopped Fiber for Flame Retardant & Thermal Insulation
Preoxidized PAN (polyacrylonitrile) chopped fiber is a flame-resistant, thermally stable material widely used in high-performance composite reinforcement, energy storage, and personal protective equipment. It is made by thermally stabilizing PAN precursor fibers and then cutting them into short lengths suitable for diverse industrial applications.
What Is Preoxidized PAN Chopped Fiber?
Preoxidized PAN fiber is an intermediate material in the carbon fiber production process. It features a stabilized ring structure formed during oxidation at 200–300°C, making it inherently flame retardant, chemically inert, and suitable for high-temperature use. Chopped into lengths of 3mm to 50mm, it meets various processing and application requirements.
Preoxidized PAN Chopped Fiber Key Properties and Advantages
- Flame Retardant: LOI ≥ 45%—non-melting, non-dripping, and self-extinguishing.
- High Temperature Resistance: Operates up to 1500°C with low thermal conductivity (~0.05 W/m·K).
- Chemical Stability: Resistant to acids, alkalis, solvents, and UV degradation.
- Eco-Friendly: No binders or toxic gas emissions during processing.
- Electrical Insulation: Low dielectric constant; ideal for electronic composites.
Preoxidized PAN Chopped Fiber Technical Specifications
| Technical Parameters | Value |
|---|---|
| Fiber Length | 6mm ± 0.5mm ( 3mm, 6mm, 12mm, 38mm, 50mm customizable) |
| Filament Diameter | 8-12 μm |
| Density | 1.40-1.45 g/cm³ |
| Carbon Content | 50-60 wt% |
| Oxygen Content | >45% |
| Tensile Strength | 300-600 MPa |
| Modulus | 15-25 GPa |
| Elongation at Break | 5-10% |
| Ash Content | ≤ 1% |
| Moisture Content | ≤ 0.5% |
| pH Value | 6-8 (neutral) |
| Thermal Conductivity | 0.05-0.15 W/(m·K) |
| Resistivity | 10³-10⁵ Ω·cm |
Preoxidized PAN Chopped Fiber Applications
1. Fire-Resistant Personal Protection: Used in fire-resistant garments, combat suits, fire blankets, and high-speed rail insulation layers.
2. Automotive Thermal and Friction Parts: Ideal for brake pads, gaskets, engine insulation, and lightweight interior materials like seat fillers and carpets.
3. Energy Storage and Battery Electrodes: Provides both conductivity and flame resistance in large-scale battery electrodes, reducing reliance on imports.
4. Composite Reinforcement: Enhances mechanical properties when mixed with resins in sports gear, cement additives, and sealing parts.
5. Aerospace and Industrial Use: Applied in aircraft brake pads, heat insulation layers, and flame-retardant furniture filling.
Why Choose Our Preoxidized PAN Chopped Fibers?
Our fibers are precision-cut, quality-controlled, and customizable to meet strict industrial requirements. We ensure high purity, low moisture, and excellent batch consistency for composite manufacturing and insulation solutions.
Contact us for samples, technical datasheets, and pricing tailored to your application.
