Heat resistant insulation sheet
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The Damma 550L thermal insulation sheets are made by combining mica paper with silicone adhesives. These insulators have excellent machinability with electrical insulation, heat resistance, and thermal insulation properties.
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Characteristics
Excellent heat resistance（550L：550℃）
The lamination effect of mica scales achieves flexural strength and compressive strength that are several times stronger compared to normal insulators, which allows for use in structural materials.
Excellent arc resistance/corona resistance/tracking resistance/withstand voltage.
Easy to perform machine processing such as machining/drilling. We can custom-make various shapes for washers, flanges, etc.
Use
Thermal insulating washers for electrical furnace
Thermal insulating plates for induction furnace
Thermal insulating parts for FA equipment
Insulating flanges for high-temperature fluid piping
Composition, standard dimensions and properties
Damma 550Ｌ
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Composition,standard dimensions
Mica Mica paper based on muscovite Binder Silicone Thickness（mm） 1.2～30.0 Width × length（mm） 500×1000 -
Properties
Nominal thickness（mm） 10 Apparent density（kg/㎥） 2.2×10³ Loss of mass by heating：550℃×2hr（wt.％） 0.50 Flexural strength（MPa） 145 Tensile strength（MPa） 106 Insulation resistance：Normal state（MΩ） 2000 or more Insulation resistance：At high temperature※500℃（MΩ） 2000 Dielectric breakdown strength（kV/mm） 28 Compressive strength（MPa） 500 Young's modulus（GPa） 80 Linear expansion coefficient（1/K） 1.1×10⁻⁵ Thermal conductivity（W/m·K） 0.18 Arc resistance（s） 420 or more Comparative tracking index/CTI（V） 600 or more
- *Measured in compliance with JIS C 2116 and JIS K 6911
- *The above values are examples from tests, and are not guaranteed values.