Carbon Felt: High Efficiency Adsorption & Insulation Material

  • Low thermal conductivity coefficient, high temperature resistance.
  • High electrical conductivity, high strength.
  • Excellent adsorption, low density.
A rolled carbon felt and an unfolded carbon fiber felt

Carbon felt is a felt-like material made of carbon fibers, which can be converted into graphite felt through high-temperature graphitization. Carbon felt has broad-spectrum adsorption, large capacity, good adsorption of inorganic gases, non-melting or dripping when exposed to fire, no smoke and toxicity. It can maintain flame-retardant performance even after repeated washings. Besides, it can be used as an adsorption purification material, insulation material for vacuum furnaces, and inert gas furnaces.

Currently, carbon felt is mainly divided into polyacrylonitrile (PAN)-based carbon felt, viscose-based (rayon)-based carbon felt, and bitumen-based carbon felt. Among them, PAN-based carbon felt is the most widely used.

  • Thermal insulation.Carbon felt has low thermal conductivity coefficient, low thermal capacity, low density, high temperature resistance, and heat shock resistance.
  • Lightweight and aesthetically pleasing. It can enhance the surface strength of composite materials while being lightweight and having high strength.
  • Environmentally friendly with good adsorption capacity. It has good adsorption properties for inorganic gases.
Table 1: Carbon Felt Specifications
Model Heat Treatment Temperature Carbon Content Density (g/cc) Ash (ppm) Available Thickness (mm)
CSF-1 (Pan-Based) 1200 °C ≥ 97.5% 0.14–0.16 ≤ 800 3/5/6/8/10/12.7
CSF-2 (Rayon-Based) 1200 °C ≥ 99.5% 0.12–0.14 ≤ 300
  • 1 MPa = 10.2 kgf/cm2; 1 W/m.k = 0.86 kcal/cm.h.°C
  • These properties are typical values and not guaranteed.
  • Solvent recovery. It can be used for the adsorption and recovery of (gas and liquid) solvents in chemical, pharmaceutical, spray painting, chemical fiber, rubber and other industries.
  • Air purification. It can absorb and filter air polluted by organic solvents as well as smoke generated in daily life (such as SO2, NO2, O3, NH3, etc.).
  • Water purification. It can remove heavy metal ions, carcinogens, odors, residual chlorine, bacteria, and discoloration in water.
  • Protective equipment. It can be used to make gas masks, masks, protective chemical products, smoke filtering plugs, etc.