G11/FR5 Epoxy Glass Sheet/Tube/Rod

Description

SIDA G11/FR5 epoxy glass sheets, tubes, and rods are premium-grade thermoset composite insulation materials manufactured with high-quality epoxy resin and glass fiber reinforcement. G11 (EPGC203) delivers exceptional mechanical strength and electrical insulation at continuous operating temperatures up to 180°C (H-Class). FR5 (EPGC204) offers the same superior performance with UL94 V-0 flame-retardant properties for enhanced fire safety. Available in standard and custom dimensions with fast turnaround.

Key Benefits:

✅ H-Class insulation (180°C continuous)
✅ Superior flexural & tensile strength at elevated temps
✅ Low moisture absorption (<0.15%)
✅ FR5: UL94 V-0 flame retardant rating
✅ RoHS & REACH compliant

Detailed Introduction

Advanced Composite Engineering for Demanding Applications

SIDA’s G11 and FR5 epoxy glass laminates are manufactured through a precision hot-pressing process using electrical-grade glass fiber fabric impregnated with high-performance epoxy resin system. This production method ensures uniform resin distribution, exceptional dimensional stability, and consistent electrical properties across the entire material cross-section.

G11 (EPGC203) conforms to NEMA LI-1 G-11 and IEC 60893 EPGC203 standards, designed for applications requiring reliable performance in high-temperature environments up to 180°C. It maintains >50% of its room-temperature mechanical strength at 150°C, making it ideal for electrical equipment operating under thermal stress.

FR5 (EPGC204) meets NEMA LI-1 FR-5 and IEC 60893 EPGC204 specifications, incorporating a flame-retardant epoxy system that achieves UL94 V-0 classification without compromising mechanical or electrical properties. This makes FR5 the preferred choice for applications requiring both thermal endurance and fire safety compliance.

Processing Versatility: Our G11/FR5 sheets, tubes, and rods can be precision machined using CNC routing, drilling, turning, and milling. The material exhibits minimal tool wear, excellent chip formation, and tight tolerance capability (±0.05mm). Suitable for threading, grinding, and polishing to achieve specific surface finishes.

Technical Data Tables

Test Report
Product name: EPGC308(G11) Test time :2026.1
No	Test Item		Unit	Standard	Result	Test method
1	Flexural strength perpendicular to laminations	A:under normal conditions	MPa	≥340	512	ISO 178
		E-1/150:under 150±5℃		≥170	374
		E-1/180:under 180±5℃		/	261
2	Notch Impact strength parallel to lamination (Notched charpy)		kJ/m2	≥ 33	64	ISO 179
3	Dielectric strength perpendicular to laminations (in oil 90±2 ℃),1.2mm in thickness		kV/mm	≥ 13.7	19.5	IEC 60243
4	Breakdown voltage parallel to laminations(in oil 90±2 ℃ )		kV	≥ 35	85	IEC 60243
5	Water absorption,1.6mm in thickness		mg	≤ 19	9.2	ISO 62
6	Insulation resistance Impregnated in water, D-24/23		Ω	≥5.0×1010	7.5×1012	IEC 60167
7	Temperature index		℃	180	195	IEC 60216
8	Bonding strength		N		8047
9	Density		g/cm3	≥1.70	1.98	ISO 1183

Test result: Pass

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

Transformer Insulation: High-voltage winding supports, spacers, and lead-out insulation
Switchgear Components: Arc barriers, phase barriers, contact supports in MV/HV switchgear
Motor & Generator: Slot wedges, end plates, rotor banding rings operating at 155-180°C

2. Electronics & Semiconductor

PCB Test Fixtures: High-temperature test jigs for burn-in testing at 150°C+
Wave Solder Pallets: Dimensional stability through repeated thermal cycles
IC Test Sockets: Precision machined sockets for automated testing equipment

3. Rail & Transportation

Traction Systems: Insulation components for railway traction motors and converters
Metro Signaling: Flame-retardant (FR5) barriers in underground rail systems (EN 45545 compliance)
EV Battery Systems: Thermal runaway protection plates, busbar insulation

4. Renewable Energy

Wind Power Converters: Insulation supports for IGBT modules in nacelles
Solar Inverters: High-temperature PCB supports and heat sinks insulation
Hydrogen Systems: Electrolyzer cell frames and separator plates

5. Oil & Gas Industry

Downhole Tools: Electrical insulation for MWD/LWD tools operating at 150°C+
Explosion-Proof Equipment: Flame-retardant FR5 for hazardous area (ATEX) compliance
Pump Controllers: VFD drive insulation in harsh thermal environments

6. Aerospace & Defense

Avionics: Radar system insulation, power distribution components (MIL-I-24768)
Satellite Systems: Low-outgassing variants for space applications
Military Vehicles: Fire-resistant insulation for combat vehicle electronics

Frequently Asked Questions (FAQs)

Q1: What is the primary difference between G11 and FR5 epoxy glass? A: The main difference is flame retardancy. G11 (EPGC203) is a standard H-Class material. FR5 (EPGC204) contains flame-retardant additives achieving UL94 V-0 rating while maintaining the same mechanical and electrical performance. Both operate at 180°C continuous.

Q2: Can SIDA provide material certifications for these products? A: Yes. We provide Batch Test Certificates (BTC) with each shipment, including dielectric strength, flexural strength, and flammability data. UL Yellow Cards, RoHS, REACH, and IEC test reports are available upon request. Material traceability is maintained per ISO 9001.

Q3: What is the minimum thickness available, and can it be used for thin-film applications? A: Our minimum sheet thickness is 0.1mm for specialized applications. For films below 0.5mm, we recommend evaluating our G11/FR5 prepreg materials or coating-grade resins for optimal performance.

Q4: How does G11/FR5 compare to G10/FR4 materials? A: G10/FR4 is rated for 130°C (B-Class), while G11/FR5 is H-Class (180°C). G11 maintains 50%+ mechanical strength at 150°C, whereas G10/FR4 loses significant properties above 130°C. For high-temperature applications, G11/FR5 is the superior choice despite a 20-30% cost premium.

Q5: Is machining G11/FR5 difficult? What tools are recommended? A: G11/FR5 machines similarly to other epoxy laminates. Use carbide tools with high rake angles, feed rates of 0.1-0.3mm/rev, and spindle speeds of 3,000-8,000 RPM for optimal results. Avoid excessive heat buildup. We offer CNC machining services with ±0.05mm tolerance capability.

Q6: Can these materials be used in food processing equipment? A: Standard G11/FR5 is not FDA-approved for direct food contact. However, we can manufacture FDA-compliant variants using specific epoxy systems. Please specify this requirement when requesting a quote.

Q7: What is the typical lead time for custom sizes? A: Standard sizes ship within 3-5 business days. Custom sheet sizes (cut-to-size) ship in 7-10 days. Custom thicknesses or CNC machined parts typically require 2-3 weeks, depending on complexity.

Q8: Does humidity affect the performance of G11/FR5? A: With water absorption <0.15%, these materials exhibit excellent moisture resistance. However, for applications in >95% RH environments, we recommend surface sealing or considering our hydrophobic-treated variants to maintain dielectric properties.

Testing Standards & Compliance

International Standards:

NEMA LI-1: G-11 and FR-5 grades
IEC 60893: EPGC203 & EPGC204 specifications
UL 94: Flame classification (FR5: V-0)
UL 746B: Thermal index 180°C
MIL-I-24768/2 & /14: Military grade available

Quality Certifications:

ISO 9001:2015 Quality Management System
RoHS Directive 2011/65/EU compliant
REACH Regulation (EC) 1907/2006 compliant

Test Reports Available:

Dielectric breakdown per IEC 60893-2
Flexural strength at elevated temperatures
Flammability test (UL94)
Thermal aging per UL 746B
CTI (Comparative Tracking Index) per IEC 60112

Batch Traceability: Every production lot is assigned a unique batch code linking to raw material certificates, process parameters, and quality test data. Retained samples stored for 5 years.