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Pre-oxidized fiber felt, also known as pre-oxidized PAN (polyacrylonitrile) fiber felt, is a type of non-woven textile material made from pre-oxidized PAN fibers. PAN fibers are high-strength, high-modulus synthetic fibers that are commonly used in the manufacture of carbon fiber.
To create pre-oxidized fiber felt, the PAN fibers are first pre-oxidized, which involves heating the fibers in an oxygen-rich environment to convert them into a heat-stable state. The pre-oxidized fibers are then carded and needle-punched to create a non-woven felt fabric.
Pre-oxidized fiber felt has a number of desirable properties, including high temperature resistance, good thermal stability, and excellent chemical resistance. It is often used in high-temperature applications such as insulation in furnaces, boilers, and other industrial equipment. It can also be used as a filter medium in air and liquid filtration systems due to its high porosity and filtration efficiency.
Technical data:
| Property | Unit | Carbon fiber felt | Graphite fiber felt |
| Code Number | -- | PFF-900 | PFF-2000 |
| Working Temperature | ℃ | 900±50 | 2200 |
| Thermal conductivity (350℃) | W/m.k | 0.06~0.09 | 0.08~0.30 |
| Thermal conductivity (1550℃) | W/m.k | 0.22~0.30 | 0.50~0.65 |
| Carbon Content | % | ≥85 | ≥99.85 |
| Ash Content | ppm | ≥3000 | 500~1500 |
| Bulk Density | g/cm3 | 0.10~0.12 | 0.08~0.10 |
| Width | cm | ≤160 | ≤140 |
| Thickness | mm | 3, 5, 8, 10±0.5 | 3, 5, 8, 10±0.5 |
Pre-oxidized fiber felt, also known as carbon fiber felt, has several advantages:
Overall, pre-oxidized fiber felt offers a unique combination of high-temperature resistance, thermal insulation, chemical resistance, lightweight, high strength and stiffness, corrosion resistance, and electrical conductivity, making it a versatile material for a wide range of applications.