We specialize in heat-resistant insulators and fire-resistant insulants.

Flexible sheet

Flexible sheet is made by combining mica paper with silicone adhesive. It is flexible even in normal temperature, and can be deformed without heating. As an alternative for it bend are processed material and asbestos, it is widely used for the insulation of inner walls in dryers and insulation barriers of electric furnace.

In addition, this product has obtained UL94 V-0 (D680, D680A), UL94-5VA (D680), and can be utilized as fire spread prevention sheet.


  1. (1) It has excellent heat resistance and sealing properties, showing high electrical insulation.
  2. (2) It has excellent resistance to heat.
  3. (3) Highly flexible in normal temperature, and can be deformed into a custom shape.


  1. (1) Heat insulation of inner walls in hair dryers, etc.
  2. (2) Separator for fire-resistant materials
  3. (3) Slot insulation and insulation between coil layers
  4. (4) Field insulation
  5. (5) Gaskets, packing, and gland sheets
  6. (6) Fire spread prevention sheet

Composition and standard dimensions

Symbol D680 D680A
Mica Mica paper based on uncalcinde muscovite Mica paper based on phlogopite
Binder Silicone Silicone
Standard thickness(mm) 0.15~0.50
Standard dimensions(mm) 560×1000


Symbol Unit D680 D680A
Nominal thickness mm 0.15 0.30 0.15 0.30
Density kg/m3 1.94×103 1.95×103 2.11×103 2.11×103
Loss of mass
% 2.63 2.65 2.81 2.64
Tensile strength N/10 mm wide 80 100 60 83
Dielectric strength kV/mm 31 30 35 36
* Measured in compliance with JIS C 2116.
* The above properties are examples from tests, and are not guaranteed values.