Description
SIDA Epoxy Glass Mat Laminate represents the next generation of electrical insulation materials, combining woven glass fiber mat reinforcement with a specially formulated epoxy resin matrix. Through precise vacuum pressure impregnation (VPI) and hot-pressing curing processes, we create a rigid, dimensionally stable composite that maintains exceptional performance across a wide temperature range from -60°C to +180°C.
Unlike directional materials, our isotropic construction ensures uniform mechanical and electrical properties in all directions, eliminating weak points in critical applications. The material’s CTI≥600 (Comparative Tracking Index) rating significantly exceeds industry standards, providing superior resistance to electrical tracking and surface contamination—critical for high-voltage and polluted environments.
Key Advantages Over EPGM306
Our advanced formulation delivers measurable improvements over conventional EPGM306 grades:
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Enhanced Thermal Stability: Maintains mechanical strength at 180°C continuous operation
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Superior Tracking Resistance: CTI≥600 vs typical 200-400 for standard grades
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Better Moisture Resistance: <0.1% water absorption ensures stable insulation resistance
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Improved Machinability: Clean cutting and punching without delamination
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Higher Dielectric Strength: 20-35 kV/mm for reliable high-voltage applications
Technical Excellence
The molecular cross-linked polymer network formed during our curing process creates a dense, impenetrable barrier to electrical current while providing excellent resistance to partial discharge and chemical attack. The glass fiber mat architecture enhances impact resistance and provides consistent properties throughout the material thickness, from thin 1.5mm sheets to robust 100mm panels.
Technical Data Tables
Mechanical Properties
| Property | Test Method | Unit | Typical Value | IEC 60893 Standard |
|---|---|---|---|---|
| Density | ISO 1183 | g/cm³ | 1.85-2.0 | ≥1.7 |
| Flexural Strength (23°C) | ISO 178 | MPa | 450-550 | ≥340 |
| Flexural Strength (150°C) | ISO 178 | MPa | 350-420 | – |
| Compressive Strength | ISO 604 | MPa | 400-500 | ≥350 |
| Tensile Strength | ISO 527 | MPa | 320-380 | ≥310 |
| Impact Strength (Charpy) | ISO 179 | kJ/m² | 45-55 | ≥42 |
| Bonding Strength | IEC 60893 | N | ≥7,200 | ≥5,600 |
Electrical Properties
| Property | Test Method | Unit | Typical Value | Performance Rating |
|---|---|---|---|---|
| Dielectric Strength | IEC 60243-1 | kV/mm | 22-35 | Excellent |
| Volume Resistivity | IEC 60093 | Ω·cm | >10¹⁴ | Excellent |
| Surface Resistivity | IEC 60093 | Ω | >10¹² | Excellent |
| Comparative Tracking Index (CTI) | IEC 60112 | V | ≥600 | Superior |
| Proof Tracking Index (PTI) | IEC 60112 | V | ≥600 | Superior |
| Dissipation Factor (1MHz) | IEC 60250 | – | 0.015-0.025 | Low Loss |
| Relative Permittivity | IEC 60250 | – | 4.5-5.5 | Stable |
Thermal & Environmental Properties
| Property | Test Method | Unit | Typical Value | Notes |
|---|---|---|---|---|
| Thermal Class | IEC 60085 | – | H (180°C) | Continuous operation |
| Temperature Index (TI) | IEC 60216 | °C | >180 | Long-term aging |
| Heat Resistance | IEC 60893 | – | Excellent | Short-term 250°C |
| Water Absorption | ISO 62 | % | <0.1 | 24h immersion |
| Flammability | UL94 | – | V-0 / HB | Optional FR grade |
| Coefficient of Thermal Expansion | ISO 11359 | 10⁻⁶/K | 15-20 | In-plane direction |
Available Specifications
| Parameter | Options | Tolerance |
|---|---|---|
| Thickness Range | 1.5mm – 100mm | ±0.1mm (<5mm), ±2% (≥5mm) |
| Standard Sheet Sizes | 1020×1220mm, 1020×2040mm | +5/-0mm |
| Custom Sizes | Up to 2000×3000mm | Per agreement |
| Color | Natural (light green), Custom | Per batch |
| Surface Finish | Smooth (both sides), Matte | Standard |
Note:The product specifications provided are for reference purposes only. Please refer to the actual product for final specifications. We also offer various sizes and thicknesses to meet your specific needs. For further customization, please contact us.
Application Scenarios
1. Electrical Power Equipment
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Transformers: Insulation baffles, spacer blocks, coil forms, lead supports in oil-immersed and dry-type transformers up to 500kV
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Switchgear: Arc barriers, busbar supports, terminal boards, contact finger assemblies in medium and high-voltage switchgear
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Circuit Breakers: Insulating operating rods, linkage components, arc chute partitions
2. Motors & Generators
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H-Class Motors: Slot wedges, end plates, phase separators, rotor banding in high-temperature motors
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Generators: Insulation rings, retaining rings, structural braces in turbine and wind generators
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Traction Motors: Insulation components for rail and EV applications requiring 180°C capability
3. Electronics & PCB Manufacturing
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Test Fixtures: High-precision jigs and fixtures for automated testing equipment
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Wave Solder Pallets: Dimensionally stable carriers for PCB assembly
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Antenna Components: Radomes and structural supports for 5G infrastructure
4. Renewable Energy Systems
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Wind Turbines: Insulation systems for nacelle control gear and power converters
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Solar Inverters: Heat-resistant mounting plates and insulation barriers
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EV Charging Stations: High-voltage isolation components
5. Industrial & Heavy Equipment
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Welding Equipment: Transformer insulation and electrode holders
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Railway Systems: Traction converter insulation, signaling equipment
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Marine Applications: Corrosion-resistant insulation for shipboard electrical systems
Testing Standards & Certifications
International Compliance
Our Epoxy Glass Mat Laminate meets or exceeds the following globally recognized standards:
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IEC 60893-3-2: Industrial rigid laminated sheets based on thermosetting resins
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NEMA LI 1: G-11 grade specification for epoxy glass laminates
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DIN 7735: Hgw 2372.4 for H-class epoxy glass materials
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GB/T 1303.4: Chinese national standard for epoxy glass fabric laminates
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UL 94: Flammability rating (V-0 available upon request)
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RoHS 2.0 & REACH: Fully compliant with environmental regulations
Quality Assurance Testing
Every batch undergoes rigorous testing including:
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Dielectric Breakdown Voltage: 100% sampling at 90°C in oil
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Thermal Aging: 10,000-hour accelerated life testing
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CTI Validation: Track resistance verification per IEC 60112
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Dimensional Stability: Humidity and temperature cycling tests
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Mechanical Strength: Flexural and compressive testing at 23°C and 180°C
Certification Support
We provide complete technical documentation for:
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Type Test Reports: IEC standard compliance verification
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Material Safety Data Sheets (SDS): Safe handling guidelines
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Certificate of Conformance (CoC): Per batch traceability
Frequently Asked Questions (FAQs)
Q1: What makes this laminate better than EPGM306?
A: Our Epoxy Glass Mat Laminate features a higher CTI (≥600V vs. typical 200-400V), superior thermal stability at 180°C, and isotropic properties that eliminate directional weaknesses. The advanced resin formulation provides 15-20% higher mechanical strength and better moisture resistance (<0.1% absorption), ensuring reliable performance in harsh environments.
Q2: Can this material be machined easily?
A: Yes. The material exhibits excellent processing performance suitable for cutting, drilling, milling, turning, and punching. For optimal results, use carbide-tipped tools with high-speed equipment. Clean machining without delamination is achieved when using sharp tools and appropriate feed rates. We recommend diamond-coated tools for high-volume production.
Q3: What is CTI and why is ≥600 important?
A: Comparative Tracking Index (CTI) measures resistance to electrical tracking on contaminated surfaces. A CTI≥600V (PLC 0 rating) indicates the highest level of tracking resistance, essential for high-voltage applications in polluted environments. This significantly reduces failure risk in outdoor switchgear, mining equipment, and industrial transformers.
Q4: Is this material suitable for oil-immersed transformers?
A: Absolutely. The epoxy-glass composition shows excellent compatibility with mineral oil and synthetic esters. With water absorption <0.1% and dielectric strength of 22-35 kV/mm, it maintains stable insulation properties in oil-immersed applications up to 150°C hotspot temperatures.
Q5: What thickness tolerance can you guarantee?
A: We maintain tight tolerances of ±0.1mm for sheets under 5mm thickness, and ±2% for thicker sheets. Custom precision grinding is available for applications requiring ±0.05mm tolerance.
Q6: How does isotropic property benefit my application?
A: Isotropic construction ensures uniform mechanical and electrical properties in all directions (X, Y, Z axes). This eliminates weak planes common in unidirectional laminates, providing consistent performance in complex machined parts and reducing the risk of delamination under stress.
Q7: What is the shelf life and storage requirement?
A: When stored at 15-25°C and <50% relative humidity in original packaging, the material maintains properties for 24 months. Avoid direct sunlight, moisture, and chemical exposure. Store flat with adequate support to prevent warping.
Q8: Do you offer flame-retardant grades?
A: Yes. While the standard grade meets UL94 HB, we can provide V-0 flame-retardant versions upon request with minimal impact on mechanical properties. Please specify UL94 V-0 requirement when ordering.