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◆ Mica Paper Series

Mica Paper — High-Temperature Electrical Insulation

Factory-direct mica paper engineered for high-voltage cables, transformers, capacitors, motors and heating elements. Produced from premium natural and synthetic mica on 4 dedicated production lines with 4,000+ tons annual capacity. Available in every grade, grammage and width you need — exported to 30+ countries.

500–1000°C
Temperature Range
25+kV/mm
Dielectric Strength
80–200g/m²
Grammage Range
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Product Overview

What Is Mica Paper?

Mica paper is a thin, flexible electrical insulation material produced by pulping, forming and drying fine mica flakes into uniform continuous sheets. It combines the exceptional dielectric strength and heat resistance of mineral mica with the convenience and processability of paper — making it the backbone of modern high-voltage and high-temperature insulation systems.

At SZX New Materials, we manufacture mica paper on four dedicated production lines with over 4,000 tons of annual capacity. Our paper is available in natural phlogopite, natural muscovite, calcined, and synthetic fluorophlogopite grades — each engineered for a specific combination of temperature rating, dielectric strength, and mechanical performance.

Every roll is tested in-house for dielectric strength, tensile strength, mass loss, and air permeability before packing. We supply customers in the cable, transformer, motor, capacitor, EV battery, appliance and industrial heating industries across more than 30 countries.

Inside Our Factory

From Production Line to Export Pallet

Take a look inside our mica paper facility in Shenzhen — rolls of premium mica paper stacked on pallets, ready for shipment to customers across 30+ countries. This is where precision manufacturing meets export-grade packaging.

◆ Factory Workshop
Mica Paper Pallets Ready for Global Export

4 Production Lines

Parallel production capacity handles both standard grammages and custom orders without bottlenecks.

Export-Ready Pallets

Every pallet is shrink-wrapped, corner-protected and labelled per the destination country's requirements.

30+ Destination Countries

Shipped via sea freight, air cargo and express courier — full export documentation handled by our team.

Key Features

Why Engineers Specify Our Mica Paper

Every property below is backed by in-house QC testing on every batch — not marketing claims.

◆ 01

Extreme Heat Resistance

Phlogopite grade withstands 1000 °C continuous operation. Muscovite grade rated to 500 °C. No organic decomposition at rated temperature.

◆ 02

High Dielectric Strength

Guaranteed minimum of 14 kV/mm; actual values typically 25–40 kV/mm. Meets or exceeds IEC 60371 and IEC 60626 requirements.

◆ 03

Fire-Resistance Certified

Non-combustible per IEC 60331 when used in cable construction. Retains circuit integrity under direct flame exposure up to 950 °C.

◆ 04

Flexible & Workable

Can be slit, die-cut, wound, layered and laminated on standard converting equipment. Compatible with silicone, epoxy and polyimide binders.

Product Grades

Four Mica Paper Grades for Every Application

Each grade is engineered for a specific temperature range, purity level, and end-use. Click through to full specifications.

Phlogopite Mica Paper

◆ Up to 1000 °C

Amber-colored natural mica paper for the most demanding high-temperature applications. Preferred for fire-survival cables and furnace insulation.

Full Specifications

Muscovite Mica Paper

◆ Up to 500 °C

Pale-colored natural mica with superior dielectric properties. Standard choice for transformer, motor winding and general electrical insulation.

Full Specifications

Calcined Mica Paper

◆ Up to 850 °C

Heat-treated mica paper with enhanced temperature resistance and lower mass loss. Ideal for high-voltage cables requiring extended fire-survival time.

Full Specifications

Synthetic Mica Paper

◆ Up to 1200 °C

Ultra-pure fluorophlogopite paper with 99%+ crystal purity — zero iron-oxide contamination. For critical high-voltage and precision electronics.

Full Specifications
Applications

Where Our Mica Paper Is Used

From 1 kV appliance insulation to 400 kV transmission-grade cable cores — the same mica paper, engineered to each voltage class.

Fire-Resistant Cables

Wound around conductors as the fire-barrier layer in IEC 60331 fire-survival cables for buildings, tunnels, and mass transit systems.

Transformer Insulation

Used as inter-layer and end insulation in oil-filled and dry-type transformers. Calcined and synthetic grades preferred for HV applications.

Motor & Generator Windings

Phase-insulation and ground-wall layers in high-voltage motors, traction motors, and industrial generators subject to thermal cycling.

Heating Elements & Appliances

Base layer for mica heaters, hair dryers, industrial heating cores, and high-temperature sensors demanding dielectric integrity.

EV Battery & Energy Storage

Integrated into battery-pack insulation stacks and thermal-runaway barriers for EVs and stationary energy storage systems.

Railway & Rolling Stock

Locomotive traction motor insulation, cable systems under EN 45545 fire-safety standards, and passenger coach wiring.

Need Mica Paper for Your Application?

Tell us your grade, grammage, width and quantity — we'll reply within 24 hours with factory-direct pricing.

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