Heat release material, Heat sprender

Heat release material, Heat sprender

In addition to graphite's thermal conductivity and chemical resistance, PERMA-FOIL® graphite sheets exhibit excellent sealing properties thanks to the material's flexibility.

Heat release material, Heat sprender

Toyo Tanso's PERMA-FOIL® graphite sheets have high cushioning properties that allow them to adhere closely to a product and rapidly transmit heat from a heat source to a heat sink. PERMA-FOIL® has been the focus of a lot of attention as a heat countermeasure in semiconductor and electronic component manufacturing processes that require cooling.

PERMA-FOIL® is classified as graphite, meaning that it can be used between -200°C and 3200°C in a non-oxidizing atmosphere. As it also features strong resistance to acids and alkalis, PERMA-FOIL® is often used in atmospheres where other materials cannot be used.

Toyo Tanso offers a range of high-purity products and various grades of different thicknesses and densities, allowing us to propose products to suit your application, conditions, or atmosphere.


  • Excellent flexibility--PERMA-FOIL® can be bent like paper
  • Superior sealing properties
  • Excellent thermal and electrical conductivity
  • Excellent thermal durability
  • Excellent chemical resistance

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