Natural graphite flake is chemically treated to form Graphite
Intercalation Compound. This intercalation compound is then rapidly heated to decomposition. The result is a rapid expansion of the particle size. The bulk density of the worm-like graphite powders is about 0.003g/cc. Then they are formed into graphite sheets by rolling.
Principal applications:
Glands
Gaskets used in flanges, covers of observation holes, level meters.
Direct attach to the metal surfaces for gas phase sealing effectively.
Especially the expanded graphite rolls can be used as a material for automatic producing lines.
Specification of expanded graphite rolling
Item Unit Value
Tolerance of density g/cm3 -0.06~+0.06
Tolerance of thickness mm -0.04~+0.04
Carbon content % 99
Tensile strength MPa 4.5
Compressibility % >40
Recovery % >10
Sulphur content ppm <1100
Chlorine content ppm <45
Temperature °C -200~+600
Rolling sheet size:
Density(g/cm3) Length(m) Width(mm) Thickness(mm)
0.8(or)
1.0(or)1.1 30,50,80,or other size <=1500 recommend use 1000mm 0.2~1.0 recommend use 0.2, 0.25,0.3,0.4,0.5,0.6,0.75,0.8mm
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