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Rigid Mica Plate

R-5660-H series of Rigid Mica Plate are mica laminates designed for providing outstanding electrical insulation at high temperature, which consist of approximately 90 % muscovite(or phlogopite) and 10% high temperature resistant silicone resin.

R-5660-H series of Rigid Mica Plate are mainly used in domestic application (such as clothes irons, hair dryers, toaster, kettles, cooking appliances, microwave oven, air heater, etc.)and industrial heating applications (such as wound heater elements, cylindrical resistance heaters, metallurgy industry for intermediate frequency furnace, arc furnace, etc.).


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  • Types

  • According to mica paper, R-5660-H series of Rigid Mica Plate can be divided into:
    R-5660-H1 Muscovite rigid mica plate;
    R-5660-H3 Phlogopite rigid mica plate.

  • Availability

  • Thickness: 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, …… 5mm.
    Size: Sheets of 1000 x 600 mm, 1000 x 1200 mm, 1000 x 2400mm(The sheet size can be adjusted by cutting.);
    Note: The product less than 2.0mm thickness can be formed by stamping. The products larger than 2.0mm shall be processed by turning, milling, drilling and other processes.

  • Properties

  • Relative to general insulation material, the prominent advantages of the rigid mica plate are:
    Excellent insulating properties at high temperature: At 500-1000℃ operating ambient temperature, the voltage breakdown resistance is 15kV/mm;
    Excellent mechanical properties: Good flexural strength and hardness;
    Stable chemical properties: Excellent resistance to acid, alkali and oil and good aging resistance;
    Excellent environmental protection performance: The product contains no asbestos, and has less smoke and odors, even smokeless and odorless when heating;
    Excellent processability: The product can be processed into various shapes without delamination.

  • Packaging

  • One pack is 50kg in general. The product is sealed usually with plastic film and packed in carton. The fumigation-free pallet shall be used when exporting. Each pallet contains<1000kg or protected by metal drum.

  • Storage

  • Stored in dry and moisture-proof indoor place at room temperature, there is no service life limit.

  • Performance Parameter

  • ItemUnitR-5660-H1R-5660-H3Test Procedure
    Mica Paper
    MuscovitePhlogopite
    Mica Content%≈92≈92IEC 60371-2
    Bond Centent%≈8≈8IEC 60371-2
    Densityg/cm31.8-2.451.8-2.45IEC 60371-2
    Heat ResistanceContinuous Services500700
    Intermittent Services8001000
    Heat Loss at 500℃%﹤1﹤1IEC 60371-2
    Heat Loss at 700℃%﹤2﹤2IEC 60371-2
    Flexural StrengthMPa﹥200﹥200GB/T 5019.2
    Water Absorption%﹤1﹤1GB/T 5019.2
    Dielectric StrengthkV/mm﹥20﹥20IEC 60243-1
    InsulationResistance at 23℃Ω·cm10171017IEC 60243-1
    InsulationResistance at 500℃Ω·cm10121012IEC 60243-1
    Flame Resistance
    UL94 V-0UL94 V-0UL94
    Smoking tests<4<4in house