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FR4 Sheet: High-Performance Epoxy Fiberglass Laminated Sheet for Industrial Insulation
Product Summary
FR4 Sheet is a premium composite material made by laminating epoxy resin and fiberglass cloth, boasting excellent electrical insulation, high mechanical strength, heat resistance, flame retardancy, and dimensional stability. Available in multiple sizes, thicknesses, and colors, it meets international standards and is widely used in 5G infrastructure, smart grids, and high-end equipment manufacturing. With customizable options and strict quality control, it’s the trusted choice for industrial insulation solutions.
Product Overview
FR4 Sheet, a core member of our Epoxy Fiber Glass Sheets lineup, is engineered for high-demand industrial applications. This composite material combines epoxy resin’s chemical stability with fiberglass cloth’s structural reinforcement, delivering reliable performance across harsh environments. As a key product in our insulation sheet range, it integrates multiple advantages—electrical insulation to prevent current leakage, mechanical strength to withstand external impacts, and heat resistance to endure high-temperature operations—making it indispensable for industries requiring precision and durability.
Technical Specifications
Material: Composite of high-quality epoxy resin and fiberglass cloth
Sizes: 10201220mm, 10301230mm, 1220*2440mm (standard); custom sizes available
Colors: Green, black, yellow, white
Thickness: 0.2mm - 200mm
Core Performance: Electrical insulation (dielectric strength ≥18kV/mm), mechanical strength (tensile strength ≥400MPa), heat resistance (continuous use temperature up to 130℃), flame retardancy (UL94 V-0 rating), chemical resistance, dimensional stability (low water absorption ≤0.15%)
Product Features
Superior Electrical Insulation: Ensures safe operation of electrical components, ideal for high-voltage equipment.
Robust Mechanical Strength: Withstands machining and installation stress without deformation.
Exceptional Heat & Flame Resistance: Maintains performance in high-temperature environments and meets fire safety standards.
Excellent Dimensional Stability: Low water absorption and thermal expansion rate for long-term reliability.
Versatile Compatibility: Resists most chemicals, suitable for diverse industrial settings.
Quality Assured: Produced with advanced CNC processing technology, consistent with our high-end engineering plastics quality standards.
How to Use
Evaluate your application requirements (voltage, temperature, size) to select the right thickness and size.
Use professional cutting tools to trim the FR4 Sheet to your desired shape (we offer CNC Engraving services for precision).
Clean the surface to remove dust and oil before installation.
Install the sheet in the target position, ensuring firm fixation and proper insulation spacing.
Conduct routine inspections to maintain performance, avoiding exposure to extreme corrosive substances.
Application Scenarios & Real Cases
FR4 Sheet is widely trusted in key industries, with proven success in real-world applications:
5G Infrastructure: Supplied 1220*2440mm green FR4 Sheet (5mm thickness) to a European telecom equipment manufacturer for base station signal transmitters. Its superior insulation prevented signal interference, reducing equipment failure rate by 30%.
Smart Grids: Partnered with a Southeast Asian power utility for high-voltage switchgear insulation parts. Custom 8mm-thick FR4 Sheets endured 10kV voltage and outdoor temperature fluctuations (-20℃ to 60℃) without performance degradation.
Renewable Energy: Provided 3mm FR4 Sheets to a solar inverter brand in Australia. The material’s heat resistance (up to 130℃) ensured stable operation in desert areas, extending inverter service life by 5 years.
High-End Equipment Manufacturing: Supported a German precision machinery firm with CNC-machined FR4 components for industrial robots. Dimensional stability guaranteed tight fitting with other parts like Bakelite Sheet accessories, improving production efficiency by 25%.
Certifications and Compliance
ISO9001 and ISO14001 certified
Complies with EU ROHS and MSDS standards
Meets UL94 V-0 flame retardant requirements
Conforms to international electrical insulation material specifications
Customization Options
Size customization: Tailored dimensions beyond standard specifications.
Thickness adjustment: 0.2mm - 200mm, with precise thickness control.
Color customization: Special colors available for specific industry needs.
Processing services: CNC Engraving and custom shaping into Processing Products as required.
Production Process
Raw material selection: High-quality epoxy resin and fiberglass cloth inspection.
Lamination: Layer-by-layer pressing under controlled temperature and pressure.
Curing: Heat treatment to ensure material stability.
Precision processing: Cutting and polishing with advanced equipment.
Quality inspection: Multiple tests for insulation, strength, and dimensions.
Packaging: Standard protective packaging to prevent damage during transportation.
FAQ
Q: Is FR4 Sheet compatible with high-temperature environments?
A: Yes, it can be used continuously at 130℃, suitable for most industrial high-temperature scenarios (proven in Australian solar inverter projects).
Q: Can you provide custom shapes?
A: Yes, we offer CNC Engraving and Processing Product services, as demonstrated in the German industrial robot project.
Q: What certifications does the product have?
A: It holds ISO, ROHS, and UL94 V-0 certifications, complying with global standards for cross-border projects.
Q: How does it compare to 3240 Epoxy Glass Sheet?
A: FR4 Sheet offers better heat resistance and mechanical strength, ideal for higher-demand applications like 5G base stations.
Q: What’s the lead time for bulk orders?
A: For orders similar to the Southeast Asian power utility project (1000+ sheets), lead time is 15-20 days; custom orders may take 15-30 days.
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