Insulation sheets
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The D581 insulation sheets are made by combining mica paper with silicone adhesive. They have excellent heat resistance and electrical insulation properties.
Furthermore, they are unique in a way that they cause very little smoke, odor or gas and the expansion of mica at high temperature.
We always have boards with various thickness in stock to mass-produce parts in a short period of time.
These products have obtained the UL94 V-0 standard, as well as UL thermal index 746B (D581: Electrical properties 750℃, mechanical properties 450℃.)(UL File No.E58537)
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Characteristics
Cause hardly any smoke or odor when heated to high temperature.
Cause hardly any deterioration of strength or insulation resistance after heating.
Have excellent water-resistant properties, showing extremely high electrical insulation in high-humidity environments.
High edge strength which provides excellent workability for winding heater wires, etc.
Can perform die-cutting easily*, and curling work is also possible. *Die-cutting is possible up to a board thickness of 1.5 mm depending on the product shape. Please contact us for more details as some products may be difficult to process due to the shape.
Use
Heaters, heater elements, resistors, coil layers, etc.
Can suggest a variety of shapes according to customer’s specification environment.
It can be used in a wide range of applications, from home appliance parts to factory automation parts, as a heat-resistant insulating component.
Composition, standard dimensions and properties
D581
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Composition,standard dimensions
Mica Mica paper based on uncalcined muscovite Binder Silicone Standard thickness（mm） 0.15～1.2 Width × length（mm） 600ｘ1000 -
Properties
Nominal thickness（mm） 0.5 Apparent density（kg/㎥） 2.0×10³ Loss of mass by heating※550℃×2hr（wt.％） 0.50 Flexural strength（MPa） 254 Tensile strength（MPa） 237 Insulation resistance：Normal state（MΩ） 2000 or more Insulation resistance：At high temperature※500℃（MΩ） 370 Dielectric breakdown strength（kV/mm） 28 Compressive strength（MPa） 386 Young's modulus（GPa） 74 Linear expansion coefficient：100〜400℃（1/K） 1.1×10⁻⁵ Thermal conductivity（W/m·K） 0.23 Arc resistance（s） 420 or more Comparative tracking index/CTI（V） 600 or more UL 94V-0
5VA
746A
746B
- *Measured in compliance with JIS C 2116 and JIS K 6911.
- *The above values are examples from tests, and are not guaranteed values.