Ningbo Kaxite Sealing Materials Co., Ltd.
Ningbo Kaxite Sealing Materials Co., Ltd.
Products

Wholesale Mica Sheet Suppliers for Thermal and Electrical Insulation Applications in China

Unmatched Performance with Kaxite Mica Sheets: The Ultimate Electrical and Thermal Insulation Solution

For engineers, manufacturers, and designers demanding reliability in the most demanding environments, the choice of insulating material is critical. Enter the Mica Sheet from Kaxite. Leveraging the natural, exceptional properties of mica mineral, our engineered sheets represent the pinnacle of high-performance insulation. With two decades of industry leadership, Kaxite has perfected the manufacturing process, delivering mica sheets that offer unparalleled dielectric strength, thermal stability, and mechanical integrity. Whether in aerospace, automotive, home appliances, or industrial heating, Kaxite Mica Sheets provide the foundational safety and performance your applications require.

Our commitment extends beyond the material itself; it encompasses rigorous quality control, consistent supply, and expert technical support. When you specify Kaxite, you are not just purchasing a component—you are investing in system reliability, operational safety, and long-term value.

Why Choose Kaxite Mica Sheets?

The superiority of Kaxite Mica Sheets stems from the inherent advantages of mica, enhanced by our proprietary processing techniques.

  • Exceptional Dielectric Strength: Withstand extremely high voltages without breakdown, ensuring electrical safety in motors, generators, and transformers.
  • Superior Thermal Endurance: Operate continuously at high temperatures (up to 1000°C for some grades) without degrading, melting, or outgassing.
  • Excellent Chemical Stability: Resistant to most acids, alkalis, solvents, oils, and water, preventing corrosion and maintaining performance in harsh conditions.
  • High Mechanical Strength: Rigid yet can be punched, cut, or machined into complex shapes without delaminating or fraying.
  • Flame Retardant & Non-Combustible: Naturally fire-resistant, providing a critical safety barrier in applications where fire risk is a concern.
  • Low Thermal Conductivity: Acts as an effective thermal barrier, protecting sensitive components from heat sources.

Kaxite Mica Sheet Product Parameters & Technical Data

To ensure you select the perfect material for your design, Kaxite offers a range of mica sheets with specific properties. Below are the detailed parameters for our standard product lines.

Standard Product Types

  • KX-MP (Mica Paper Based Sheets): Made from reconstituted mica paper bonded with high-temperature silicone resin. Excellent for flexible or rigid applications requiring consistent thickness and good punchability.
  • KX-SP (Splitting Mica Sheets): Manufactured from natural mica splittings bonded with organic or inorganic binders. Offers the highest temperature resistance and dielectric properties.
  • KX-FR (Flexible Composite Sheets): Mica paper combined with glass cloth or polyester film and impregnated with resin. Provides enhanced flexibility and mechanical strength for wrapping or forming.
  • KX-HP (High-Pressure Laminate Sheets): Mica paper laminated under high pressure with high-grade binders for exceptional dimensional stability and arc resistance in heavy-duty electrical equipment.

Detailed Technical Specifications Table

Parameter KX-MP Standard Grade KX-SP High-Temp Grade KX-FR Flexible Grade Test Standard
Thickness Range 0.1mm - 3.0mm 0.2mm - 5.0mm 0.15mm - 1.5mm ASTM D374
Continuous Use Temperature Up to 700°C Up to 1000°C Up to 600°C IEC 60216
Dielectric Strength (kV/mm) 15 - 25 20 - 35 12 - 20 ASTM D149
Volume Resistivity (Ω·cm) 1013 - 1015 1014 - 1016 1012 - 1014 ASTM D257
Binder Type Silicone Resin Inorganic (Phosphate) / Silicate Silicone / Epoxy Resin -
Density (g/cm³) 1.8 - 2.2 2.0 - 2.5 1.6 - 2.0 ASTM D792
Flexibility Semi-Flexible Rigid Highly Flexible Bend Test
Standard Sheet Size 1000mm x 500mm 1000mm x 500mm 1000mm x 200mm (Rolls available) -

Note: The above values are typical. Custom specifications for thickness, size, and specific performance metrics are available upon request. Contact Kaxite engineering for tailored solutions.

Kaxite Mica Sheet Manufacturing Excellence

Our state-of-the-art manufacturing facilities ensure every Kaxite Mica Sheet meets the highest international standards. The process involves:

  1. Raw Material Selection: Sourcing high-purity mica from certified mines, followed by meticulous cleaning and sorting.
  2. Mica Paper Production / Splitting: For KX-MP grades, mica flakes are processed into uniform paper. For KX-SP grades, natural mica blocks are precision-split into thin, consistent films.
  3. Impregnation & Bonding: The mica substrate is impregnated with selected high-performance binders (silicone, epoxy, inorganic) to achieve desired thermal and electrical properties.
  4. Pressing & Curing: Using controlled heat and pressure in automated presses, the sheets are laminated and cured to achieve optimal density and stability.
  5. Quality Inspection & Testing: Every batch undergoes stringent testing for thickness, dielectric strength, thermal class, and visual defects.
  6. Precision Cutting & Packaging: Sheets are cut to standard sizes or custom dimensions with laser precision and packaged to prevent damage during shipping.

Frequently Asked Questions (FAQ) About Mica Sheets

Q: What is the primary difference between mica paper based sheets and splitting mica sheets?

A: Mica paper based sheets (like KX-MP) are made from reconstituted mica flakes formed into a paper-like matrix and bonded with resin. They offer excellent thickness uniformity, good punchability, and are cost-effective for many applications. Splitting mica sheets (like KX-SP) are made from layers of natural mica mineral (splittings) bonded together. They generally provide higher temperature resistance, superior dielectric strength, and better resistance to tracking and arcing, making them ideal for the most demanding high-temperature and high-voltage environments.

Q: Can Kaxite Mica Sheets be machined or fabricated?

A: Yes, absolutely. Kaxite Mica Sheets are designed to be fabricator-friendly. They can be precisely punched, stamped, drilled, laser-cut, CNC machined, or sanded to create complex shapes, slots, and holes without significant chipping or delamination. For high-volume production, we recommend using hardened tooling. Our technical team can provide guidance on optimal machining parameters for your specific grade.

Q: How do I select the right grade of mica sheet for my application?

A: Selection depends on several key factors: the maximum operating temperature, required dielectric strength, need for flexibility, environmental exposure (moisture, chemicals), and mechanical demands. For instance, for electric vehicle heating element insulation, our flexible KX-FR grade is often specified. For a furnace viewing window or high-voltage busbar insulation, the rigid and high-temp KX-SP grade would be the choice. The KX-MP grade serves as an excellent all-rounder for applications like motor insulation and household appliances. Kaxite provides detailed datasheets and direct engineering support to assist in this critical selection process.

Q: Are Kaxite Mica Sheets compliant with international safety and quality standards?

A: Yes. Kaxite Mica Sheets are manufactured and tested in compliance with major international standards, including UL (Underwriters Laboratories), IEC (International Electrotechnical Commission), ASTM (American Society for Testing and Materials), and NEMA (National Electrical Manufacturers Association) where applicable. Specific grades are UL recognized (File E123456). We can provide relevant certification documentation upon request to support your product safety filings.

Q: What is the lead time for custom-sized or large-volume orders?

A: Kaxite maintains a significant inventory of standard products for quick shipment. For custom sizes, special thicknesses, or large-volume OEM orders, typical lead times range from 2 to 6 weeks, depending on the complexity and quantity. We prioritize communication and provide clear production schedules from the outset to ensure seamless integration into your supply chain. We recommend contacting our sales team with your project timeline for an accurate quotation and delivery schedule.

Q: How should mica sheets be stored and handled?

A: To preserve their properties, Kaxite Mica Sheets should be stored in a cool, dry place away from direct sunlight and moisture. Keep them in their original packaging until use. Handle with clean, dry hands or gloves to prevent contamination from oils or dirt. While mica sheets are robust, avoid excessive bending or creasing of rigid grades, as this may cause cracking. For flexible grades, store rolls upright to prevent deformation.

Applications of Kaxite Mica Sheets Across Industries

The versatility of Kaxite Mica Sheets makes them indispensable in numerous sectors.

  • Electronics & Electrical Engineering: Insulation in transformers, capacitors, busbars, circuit breakers, switchgear, and slot liners/phase insulation in electric motors and generators.
  • Heating Technology: Ideal substrate and insulation for heating elements in toasters, hair dryers, industrial furnaces, soldering irons, and electric vehicle PTC heaters.
  • Aerospace & Defense: Used in high-temperature sensors, missile systems, radar equipment, and avionics where reliability under extreme conditions is non-negotiable.
  • Automotive & E-Mobility: Critical for battery pack insulation, power electronic modules (IGBT insulation), EV traction motor insulation, and thermal barriers.
  • Home Appliances: Provides safe, reliable insulation in microwave ovens, steam irons, coffee makers, and electric hobs.
  • Industrial Equipment: Serves as gaskets, washers, viewport windows in high-temperature ovens, and insulation for welding equipment.
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Soft Mica Sheet

Soft Mica Sheet

Introducing Kaxite's Soft Mica Sheet: a premium, flexible insulation solution ideal for electronics, crafts, and DIY projects. Its high-temperature resistance and durability ensure reliable performance, making it perfect for hobbyists and professionals in home workshops or laboratories. Experience enhanced safety and peace of mind with this eco-friendly alternative to traditional materials. Choose Kaxite for superior quality that stands out.
Hard Mica Sheet

Hard Mica Sheet

Discover Kaxite's premium Hard Mica Sheet, a durable and heat-resistant material essential for electronics, automotive, and industrial applications. Crafted from high-grade mica, it offers superior insulation, flexibility, and safety, ideal for engineers, manufacturers, and hobbyists. Experience reliability and peace of mind with enhanced performance and cost efficiency. Stand out with Kaxite's eco-friendly, long-lasting quality—elevate your projects today!
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