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

Super-heat insulation sheet
(product under development)

Super-heat insulation sheet is a thermally and electrically insulated sheet characterized by lighter weight and better insulating performance than the previous product (D581A).


  1. (1) Super-heat insulation sheet has better insulating performance than the previous product
    (thermal conductivity of 0.084 W/mK).
  2. (2) It is about 25% lighter than the previous product.
  3. (3) It offers excellent workability and can be easily cut, trimmed, or punched.

*Punching may be difficult depending on the product shape. Please contact us for more information.


  1. (1) Size and weight reduction of insulating and fire-containing products that function in emergencies such as thermal runaway scenarios as well as customer-designed products
  2. (2) Highly thermally and electrically insulated washers and gaskets
  3. (3) Weight reduction of fireproof doors

Comparison of product makeup

Model number D58UZ2D581A (previous product)
Mica Mica paper based on phlogopite Mica paper based on phlogopite
Adhesive SiliconeSilicone

*Please contact us for more information about thickness and dimensions as the product remains under development.

Comparison of characteristics

Item D58UZ2 t=0.5 D581A t=0.5
Thickness mm 0.50 0.48
Density g/cm3 1.55 2.09
Thermal conductivity
W/(m・K) 0.084 0.193
Flexural strength MPa 68 152
Compressive strength MPa 314 300
Dielectric strength kV/mm 22 21
Permittivity 2.1 2.85
Dissipation factor 0.32 0.38
Tracking resistance CTI(V) ≧600 ≧600
Flame resistance UL94 V-0 equivalent UL94 V-0
Cuttability Excellent Excellent
Punchability Excellent Excellent
Water immersion
(24 hrs)
0.32 0.28

Features of product under development: The product is lighter than the previous product and has higher thermal insulation performance.

*Specifications are subject to change without notice as product remains under development.
*Measured in compliance with JIS C 2116 and JIS K 6911.
*The above values are example from tests, and are not guaranteed values.