High-density SIGRATHERM graphite foil is manufactured from natural graphite via an expansion process followed by intensive calendering without the use of adhesives or binders.
The foil’s flexibility allows a very good form locking on surfaces and thus a virtually lossless transfer of heat or cold. The in plane thermal conductivity of 400-500 W/mK enables optimal heat dissipation in the respective application.
- Excellent in-plane thermal and electrical conductivity
- Long term stability
- Low weight
- Outstanding heat, oxidation and corrosion resistance
During the manufacturing process of flexible graphite foil, the natural graphite's inherent very good electrical and thermal conductivity is retained. The expansion process enhances this property even further. The graphite undergoes an enlargement of its surface, which leads to a significant reduction of its density and thus weight. At the same time, the thermal conductivity improves during compression to foils.
The stronger the compressing the more the orientation of the individual graphite crystals in the plane increases. As a result, the degree of directional dependence (anisotropy) of the conductivity rises. Both features can be controlled in the production in a targeted way - a great advantage in the application of SIGRATHERM high-density graphite foil.
SIGRATHERM HD (High Density) is easy to handle and can be cut without special tooling. The foil is available in various dimensions and densities as well as purities and is usually sold on rolls.
SIGRATHERM synthetic graphite foil is the best available heat dissipation material, outperforming even copper and aluminum. The foil is suitable for a large number of high-end cooling and heat dissipation applications in the electronics industry - especially where the installation space is scarce and the requirements for the dissipation of heat are particularly high.
SIGRATHERM synthetic graphite foil is available as sheets in sizes. Please contact us.
- Outstanding in-plane electrical and thermal conductivity: λ up to 1500 W/mK
- Graphite-like anisotropic behavior, i.e. low conductivity perpendicular to the plane
- 25% lighter than aluminum and 80% lighter than copper
- Can eliminate hot spots
Together with you, we select the best heat transfer foil from our portfolio for your individual requirements. Please contact us!
|High density foil||Synthetic graphite foil||Graphite/ metal composite foil|
|Product name||SIGRATHERM HD foil||SIGRATHERM SGF||SIGRATHERM GMF|
|Heat dissipation in automotive||●||●|
|Heat dissipation in electronic devices||●||●|
|Heat dissipation in batteries||●||●|
|High end heat dissipation||●||●||●|