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.
In addition, this product has obtained UL94 V-0 (D680, D680A), UL94-5VA (D680), and can be utilized as fire spread prevention sheet. It can be easily fixed with double-stick tape.


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


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

Composition and standard dimensions

D680 D680A
Mica Mica paper based on uncalcined muscovite Mica paper based on phlogopite
Binder Silicone
Standard thickness (mm) 0.15 to 0.50
Width × length (mm) 560 × 1000


D680 D680A
Nominal thickness mm 0.3 0.3
Apparent density kg/m3 1.9×103 2.1 × 103
Loss of mass by heating (550℃× 2 hr) wt% 2.37 2.38
Tensile strength N/10 mm wide
100 83
Insulation resistance 2000 or more 2000 or more
Dielectric breakdown strength kV/mm 37 42
Thermal conductivity W/m·K 0.09 0.12
Arc resistance S 252 184
Comparative tracking index (CTI) GPa 22 14
Flexibility N/m 349 378
UL 94V-0

*Measured in compliance with JIS C 2116 and JIS K 6911.
*The above values are examples from tests, and are not guaranteed values.