◆ Natural Mica

Muscovite Mica Paper - natural white mica insulation paper for motors, transformers, capacitors and electrical appliances

◆ Mica Paper Series

Muscovite Mica Paper — Versatile Natural Insulation Paper

Name: Muscovite Mica Paper
Brand: SZX New Materials
Availability: InStock

A versatile insulation material derived from natural muscovite — the most abundant mica species — through crushing, exfoliating and wet-laid papermaking. Thin, flexible, and easy to work with. The standard choice for motors, transformers, capacitors, and home-appliance heating elements up to 33 kV class.

500°C

Continuous Use

28kV/mm

Dielectric Strength

0.03–0.15mm

Thickness Range

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Product Overview

What Is Muscovite Mica Paper?

Muscovite mica paper is made from natural muscovite — the world's most abundant mica mineral species — processed through crushing, exfoliating, and wet-laid papermaking. The result is a thin, pliable insulation sheet that combines the dielectric strength of mineral mica with the handling characteristics of paper.

Its pale, silvery-white appearance is the hallmark of high-quality muscovite. Compared to phlogopite (amber mica), muscovite offers superior dielectric properties and lower cost, making it the default choice for the vast majority of standard electrical insulation applications operating below 500 °C.

At SZX New Materials, our muscovite mica paper is produced in thicknesses from 0.03 mm to 0.15 mm, with custom widths and slitting available. It can be laminated with silicone, epoxy, or polyimide binders to produce rigid or flexible mica plates, tapes, and die-cut components. Every roll is tested for dielectric strength, tensile strength, and mass loss before export packing.

◆ White Mica

Muscovite mica paper structure detail showing layered mineral mica flakes in uniform sheet formation

◆ Material Detail

Key Features

Five Reasons Muscovite Mica Paper Is a Workhorse Material

Dielectric performance, workability, and proven reliability — at a price point that makes it the standard choice for mass-produced electrical equipment.

◆ 01

Excellent Electrical Insulation

Dielectric strength of 15–28 kV/mm and volume resistivity ≥10¹⁴ Ω·cm — reliable insulation for low- to medium-voltage equipment up to the 33 kV class.

◆ 02

Moderate Temperature Resistance

Stable, consistent performance at continuous operating temperatures of 400–500 °C, with short-term peaks up to 600 °C. Fits most industrial and electronic applications.

◆ 03

Mechanical Versatility

Thin 0.03–0.15 mm construction with good tensile strength. Can be slit, die-cut, and laminated with resins or adhesives to form custom-shaped insulation parts.

◆ 04

Thermal Insulation

Low thermal conductivity of 0.1–0.16 W/(m·K) — reduces heat transfer and protects sensitive components inside electrical enclosures and mechanical equipment.

◆ 05

Chemical Stability

Resistant to moisture, oil, and weak acids — performance remains stable in humid or indoor industrial environments with minimal degradation over time.

◆ Technical Specifications

Muscovite Mica Paper Key Parameters

Core performance specifications verified in our in-house QC laboratory. Custom thicknesses, widths, and grammages available on request.

◆ 01

Dielectric Breakdown Strength

15–28kV/mm

Reliable insulation for low- to medium-voltage equipment up to 33 kV class.

◆ 02

Volume Resistivity

≥10¹⁴Ω·cm

Exceptional insulation resistance even under elevated temperature conditions.

◆ 03

Continuous Operating Temperature

400–500°C

Short-term peak tolerance up to 600 °C without loss of dielectric integrity.

◆ 04

Thermal Conductivity

0.10–0.16W/(m·K)

Low heat transfer — protects sensitive components in electrical enclosures.

◆ 05

Paper Thickness Range

0.03–0.15mm

Full thickness range for winding, layering, die-cutting and lamination.

◆ 06

Chemical Resistance

Moisture/ Oil / Weak Acid

Stable performance in humid, oily, or mildly corrosive indoor environments.

Customization: Custom grammages, widths, and slit-to-width rolls are available. Muscovite mica paper can be laminated with silicone, epoxy, or polyimide binders to produce rigid or flexible mica plates, tapes, and die-cut insulation parts tailored to your application. Contact our engineering team for a detailed specification sheet.

Applications

Where Muscovite Mica Paper Is Specified

From the humblest household appliance to megawatt-class transformers — muscovite is the mica paper engineers reach for first.

Electrical Equipment

Used as slot insulation in motors, coil winding in transformers, and as the dielectric layer for capacitors in home appliances and industrial machinery.

Electronics Manufacturing

Integrated into circuit boards, battery packs, and electronic enclosures — prevents short circuits and enhances thermal management in compact assemblies.

Home Appliance Industry

Used as insulation material between heating elements and housings in ovens, microwaves, toasters, hair dryers and general heating appliances.

Construction & Wiring

Applied to high-voltage cable insulation and electrical panel linings — helping meet residential and commercial building safety standards worldwide.

Muscovite Mica Paper — Versatile Natural Insulation Paper

What Is Muscovite Mica Paper?