Product Description
FR4 Glass Epoxy Sheet is a high-strength, flame-retardant insulating material made from woven fiberglass cloth impregnated with epoxy resin. It is widely recognized as the industry standard for electrical insulation and printed circuit boards. FR4 offers an excellent balance of mechanical strength, electrical insulation, moisture resistance, and flame resistance (UL94 V-0).
Key Features:
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Excellent electrical insulation properties
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Flame retardant (self-extinguishing, UL94 V-0 certified)
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High mechanical strength and dimensional stability
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Good resistance to moisture, chemicals, and solvents
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Continuous operating temperature up to 130C
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Smooth surface finish, easy to machine and fabricate
Applications:
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Printed Circuit Boards (PCBs)
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Transformers, motors, and switchgear insulation
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Electrical enclosures and structural components
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Mechanical fixtures and jigs requiring high strength & insulation
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Aerospace, automotive, and power electronics
Available Options:
Exceptional Insulation and Mechanical StrengthGlass Epoxy Sheet FR4 offers robust electrical insulation and outstanding mechanical strength, making it a preferred choice for critical applications such as PCB insulation, transformers, and motors. The woven glass fabric and epoxy resin combination ensures structural rigidity and high resistance to electrical breakdown even in demanding environments.
Versatile Applications and CustomizationAvailable in both standard and custom-cut sizes, these sheets accommodate varied industrial needs, from electrical panels to high-voltage equipment. Their adaptable thickness range and superior thermal resistance suit installations in distribution transformers, shipbuilding, and electrical appliances, providing reliable performance in multiple sectors.
FAQs of Glass Epoxy Sheet FR4:
Q: How are Glass Epoxy Sheet FR4 products typically manufactured?
A: Glass Epoxy Sheet FR4 is produced using hot-press molding, where woven fiberglass cloth is thoroughly impregnated with epoxy resin. The material is pressed and cured to achieve high density, mechanical strength, and a smooth semi-gloss finish.
Q: What are the primary uses of Glass Epoxy Sheet FR4?
A: These sheets are primarily used for electrical insulation in applications such as transformers, PCB bases, motor slots, electrical panels, and high-temperature equipment thanks to their superior thermal resistance and mechanical durability.
Q: When should I select custom-cut Glass Epoxy Sheet FR4?
A: Custom-cut options are ideal when your projects require specific dimensions beyond the standard 1020 mm x 2020 mm sheets. This ensures a perfect fit for specialized installations such as uniquely sized panels, transformer components, or intricate electronic assemblies.
Q: Where can Glass Epoxy Sheet FR4 be applied within industry?
A: Glass Epoxy Sheet FR4 is broadly used in sectors like electrical equipment manufacturing, shipbuilding, and power distribution. Its robust characteristics make it suitable for both indoor and outdoor electrical insulation tasks.
Q: What is the benefit of using FR4 grade epoxy over other materials?
A: FR4 grade epoxy provides excellent flame retardancy, high thermal stability (up to 180C short-term), and superior electrical insulation compared to many alternative materials, making it ideal for high-performance and safety-critical applications.
Q: How does the sheets thermal conductivity impact its performance?
A: With a low thermal conductivity of approximately 0.3 W/m.K, these sheets efficiently prevent heat transfer, thereby enhancing electrical insulation and reliability in high-temperature environments.
Q: What surface finish do Glass Epoxy Sheet FR4 sheets have?
A: Each sheet features a smooth, semi-gloss finish without additional coatings, ensuring easy handling, minimal dust retention, and straightforward installation in electrical assemblies.
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