PERMA-FOIL® is a generic term for the flexible graphite sheet that Toyo Tanso's original manufacturing technology. Widely used as a seal, to note automotive gaskets and packing. PERMA-FOIL® is formed using select acid treated natural graphite, which is compressed after undergoing high temperature expansion. Only natural graphite is used as a raw material, which yields highly flexible carbon with excellent heat resistance and chemical resistance. Other features are excellent compressibility recovery rate & airtightness and high thirmal conductivity. PERMA-FOIL® has excellent sealing properties, durability, and machinability. High purity treated products are optimum as components in the nuclear energy industry, as spacer and packing used in the semiconductor industry, as radiator plates used in the electronics industry, and as other such components. Grades are arranged for all kinds of applications and can supply in any shape, roll or cut type.
Toyo Tanso's graphite sheet, PERMA-FOIL®, is widely used as packing gasket that can replace automobile head gaskets and asbestos used in various industries by virtue of its flexibility, sealing properties and heat resistance. Its microscopic structure doesn’t allow gases or liquids to pass through easily, providing excellent sealing properties. In addition, it is made from graphite, so PERMA-FOIL® can be used between -200°C and 3200°C in a non-oxidizing atmosphere, making for strong resistance to acids and alkalis. We offer various grades of differing thicknesses and densities, allowing us to propose products to suit your application, working conditions, or surroundings. *Please contact us for more details.