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R-5660-G series · Muscovite (G1) and Phlogopite (G3) · 0.1–5 mm thick
Glossy mica plate is a rigid mica laminate made from approximately 92% muscovite or phlogopite mica paper and approximately 8% high-temperature silicone resin, pressed into a smooth, glossy sheet. The result is a high-density insulation board that holds its dielectric barrier at 500–1000 ℃ with a breakdown resistance of 15 kV/mm — well above general-purpose insulating materials.
Two grades are supplied from the same production line: R-5660-G1 (muscovite, 500 ℃ continuous / 800 ℃ intermittent) and R-5660-G3 (phlogopite, 700 ℃ continuous / 1000 ℃ intermittent). Both are asbestos-free, UL94 V-0 rated, and can be stamped, turned, milled or drilled without delamination.
The general-purpose high-temperature grade. Muscovite mica paper delivers excellent dielectric strength and flexural rigidity at continuous service temperatures up to 500 ℃.
The high-temperature grade. Phlogopite mica paper pushes the continuous service ceiling up to 700 ℃ and the intermittent ceiling to 1000 ℃, for furnaces and metallurgy equipment.
| Item | Unit | R-5660-G1 | R-5660-G3 | Test Procedure |
|---|---|---|---|---|
| Mica paper | — | Muscovite | Phlogopite | — |
| Mica content | % | ≈92 | ≈92 | IEC 60371-2 |
| Bond content | % | ≈8 | ≈8 | IEC 60371-2 |
| Density | g/cm³ | 1.8–2.45 | 1.8–2.45 | IEC 60371-2 |
| Heat resistance (continuous) | ℃ | 500 | 700 | — |
| Heat resistance (intermittent) | ℃ | 800 | 1000 | — |
| Heat loss at 500 ℃ | % | <1 | <1 | IEC 60371-2 |
| Heat loss at 700 ℃ | % | <2 | <2 | IEC 60371-2 |
| Flexural strength | MPa | >120 | >120 | GB/T 5019.2 |
| Water absorption | % | <1 | <1 | GB/T 5019.2 |
| Dielectric strength | kV/mm | >20 | >20 | IEC 60243-1 |
| Insulation resistance at 23 ℃ | Ω·cm | 1017 | 1017 | IEC 60243-1 |
| Insulation resistance at 500 ℃ | Ω·cm | 1012 | 1012 | IEC 60243-1 |
| Flame resistance | — | UL94 V-0 | UL94 V-0 | UL94 |
| Smoking test | s | <4 | <4 | In house |
At 500–1000 ℃ operating ambient temperature, glossy mica plate keeps a voltage breakdown resistance of 15 kV/mm. At 23 ℃, dielectric strength is above 20 kV/mm and insulation resistance reaches 1017 Ω·cm.
Flexural strength above 120 MPa with high surface hardness. The plate holds its shape under mechanical load and does not flex or deform under electrode pressure or clamping force.
Excellent resistance to acid, alkali and oil with good ageing resistance. Water absorption below 1% means the plate does not swell or lose dielectric strength in humid environments.
The formulation contains no asbestos and produces less smoke and odour than general insulation materials, even under heating. UL94 V-0 flame rating and smoke test under 4 seconds.
Can be formed into various shapes without delamination. Sheets below 2.0 mm can be stamped; sheets above 2.0 mm are processed by turning, milling, drilling and other machining operations.
The pressing process produces a flat, glossy surface on both faces with low friction and no visible mica flakes. The finish improves surface contact in clamping and insulation assemblies.
Insulating base plate for mica heating elements and resistive heating assemblies up to 700 ℃ continuous.
Electrode supports, arc barriers and insulation panels in industrial furnaces and metallurgy equipment.
Slot insulation, spacers and end-winding barriers in motors and generators exposed to heat and mechanical load.
Insulating plate under electrode clamps in electrolysis cells, welding equipment and arc-furnace hardware.
Heat shields and insulation plates in toasters, hair dryers, ovens and other heat-generating appliances.
Stamped parts below 2 mm and turned, milled or drilled parts above 2 mm, produced to drawing.
Both grades have the same construction — approximately 92% mica and 8% high-temperature silicone resin — and the same dielectric strength above 20 kV/mm at 23 ℃. The difference is the mica paper: muscovite (G1) runs to 500 ℃ continuous / 800 ℃ intermittent, while phlogopite (G3) runs to 700 ℃ continuous / 1000 ℃ intermittent. Choose G3 for furnaces and metallurgy equipment; choose G1 for standard high-temperature insulation. See Rigid Mica Plate for the thicker construction.
Thickness runs from 0.1 mm to 5 mm: 0.1 / 0.15 / 0.2 / 0.25 / 0.3 mm and upward in 0.05 mm steps up to 5 mm. Standard sheet sizes are 1000 × 600 mm and 1000 × 1200 mm. Custom cutting and special sheet sizes are produced by mutual agreement.
Yes. Sheets below 2.0 mm thickness can be formed by stamping — commonly used for appliance heat shields, motor slot insulation and small insulation washers. Sheets above 2.0 mm are processed by turning, milling, drilling and other machining operations. Both routes can be done to drawing.
One pack is 50 kg in general. The plate is sealed with plastic film and packed in carton; a fumigation-free pallet is used for export with each pallet under 1000 kg, or the shipment is protected by metal drum. Stored in a dry, moisture-proof indoor place at room temperature, there is no service life limit.
No asbestos is used in the formulation. Both R-5660-G1 and R-5660-G3 carry a UL94 V-0 flame rating, and the smoke test result is under 4 seconds. The plate produces less smoke and odour than general insulation materials under heating.
Tell us the grade (R-5660-G1 or R-5660-G3), thickness, sheet size and any stamping or machining requirement. Kaxite will confirm the specification, lead time and price for your project.
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No 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
0086-574-87527773
No 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China