Epoxy Glassfiber Sheet

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Product details

Epoxy Sheet, also known as epoxy glass fiber sheet or 3240 Epoxy Sheet, is a thermosetting laminate made of glass fiber cloth as a reinforcing material and epoxy resin as matrix resin, cured under high temperature and pressure. It is a high-performance engineering insulation material and one of the core basic materials in the fields of electronics, electrical engineering, and industrial manufacturing.

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Core Characteristics of Fiber Glass Epoxy Sheet

The performance of epoxy boards is determined by the mechanical strength of glass fiber and the insulation, temperature resistance, and corrosion resistance of epoxy resin. Their core advantages are concentrated in the following dimensions:

Excellent Electrical Insulation

This is the most crucial characteristic of epoxy boards. They possess extremely high volume resistivity and surface resistivity, low dielectric loss, and maintain stable insulation performance under high voltage and high frequency environments, unaffected by humidity and temperature fluctuations, acting as an "insulation barrier" for electrical equipment.

Outstanding Mechanical Properties

Glass fiber reinforcement significantly improves the mechanical strength of the board, resulting in strong resistance to bending, compression, and impact. It is not easily deformed or cracked, possessing both rigidity and toughness, and can withstand mechanical stress and external impacts during equipment operation.

Good Heat and Temperature Resistance

Conventional epoxy boards can withstand long-term operating temperatures of 130℃-150℃, while high-temperature resistant types (such as FR-4 high-temperature grade) can withstand temperatures above 180℃. They have a high heat distortion temperature, will not soften or melt in high-temperature environments, and exhibit excellent dimensional stability.

Chemical Corrosion Resistance and Weather Resistance

Exhibits excellent corrosion resistance to water, oil, weak acids, weak alkalis, and organic solvents, making it difficult to corrode or dissolve. It also boasts excellent weather resistance, exhibiting slow performance degradation and minimal aging even after long-term outdoor or humid/dusty environments.

Processability

Can be processed using conventional techniques such as cutting, drilling, milling, grinding, and stamping. High processing precision and clean edges allow for the fabrication of parts of various shapes and thicknesses to meet the customized needs of various equipment.

Dimensional Stability and Low Water Absorption

After curing, its dense structure results in extremely low water absorption. Its dimensions remain virtually unchanged even when exposed to moisture, preventing deformation and insulation degradation caused by moisture absorption, thus meeting the requirements of precision equipment.

Environmental Protection and Safety

High-quality epoxy boards contain no toxic or harmful substances and produce low smoke and low toxicity when burning, meeting industrial safety and environmental protection requirements.

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Main Application Areas of Epoxy Boards

Due to their comprehensive advantages in insulation, mechanical properties, and heat resistance, Epoxy Glass Fiber Sheet is widely used in industries with stringent material performance requirements. Core application scenarios include:

Electronics and Electrical Industry

Printed Circuit Board (PCB) Substrate: Used to manufacture various circuit boards such as those for mobile phones, computers, home appliances, and industrial control boards, supporting electronic components and providing circuit connections and insulation.

Electrical Insulation Components: Used to manufacture insulating gaskets, partitions, frames, and terminal blocks for switches, circuit breakers, transformers, and instrument transformers, as well as slot wedges and insulating end plates for motors and generators, ensuring the safe operation of electrical equipment.

Electronic Equipment Structural Components: Used for the housings, brackets, and panels of instruments and communication equipment, providing both insulation and structural support.

Industrial Manufacturing and Machinery Industry

Molds and Fixtures: Used to manufacture heat insulation plates and positioning plates for injection molds and stamping molds, as well as fixtures and jigs for electronic and hardware processing, utilizing their heat resistance, wear resistance, and ease of processing to improve processing accuracy.

Mechanical Components: Wear-resistant gaskets, guide rails, and baffles for textile, printing, and food machinery, replacing metal parts to achieve weight reduction while avoiding the conductivity and rusting problems of metal.

Tooling Platforms: Manufacturing testing and assembly platforms, dimensionally stable, with safe insulation, suitable for precision testing and assembly scenarios.

New Energy and Power Industry

New Energy Equipment: Insulating partitions and supports for photovoltaic inverters and energy storage battery cabinets; insulating components for wind turbine nacelles, suitable for high-voltage and outdoor operating environments of new energy equipment.

Power Facilities: Insulating panels and disconnecting switch components for high-voltage switchgear and distribution panels; insulating supports for transmission lines, ensuring safe power transmission.

Rail Transit Industry

Rail Transit: Insulating boards for electrical equipment in high-speed rail and subway carriages; control cabinet partitions, vibration-resistant and weather-resistant, suitable for the complex operating environment of rail transit.

Other Special Scenarios

Architectural Decoration: Electrical insulation decorative panels and fireproof partitions for high-end buildings, possessing both insulation and flame-retardant properties.

Chemical equipment: Corrosion-resistant and insulating linings and operating platforms for the chemical industry, which are resistant to corrosion from chemical media while ensuring operational safety.

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Fiber glass epoxy resin sheet 12mm surface

Precautions

1. Processing Stage

Avoid Excessive Heating

Glass Epoxy Laminate Sheet is thermosetting material. High-speed cutting and drilling during processing can generate high temperatures, causing localized carbonization and cracking, and releasing a small amount of resin odor. It is recommended to use sharp tools and employ air or water cooling.

Control Processing Precision

Although epoxy boards are easy to process, for precision parts, care should be taken to avoid stress concentration, especially during drilling and milling. It is best to form in stages to prevent edge chipping.

Dust Protection

The processing will generate fiberglass and resin dust. This dust can irritate the respiratory tract and skin. Wear masks, goggles, and gloves during operation, and ensure the work area is well-ventilated.

2. Installation and Use

Avoid Overheating and Overpressure

The long-term operating temperature of ordinary epoxy board (FR-4 / G10 Epoxy Sheet) should generally not exceed 130℃, and short-term temperatures should not exceed 150℃. Its mechanical strength also has limits; it cannot be used in scenarios subject to long-term high pressure and high-frequency vibration, otherwise deformation and delamination will occur.

Avoid Contact with Strong Corrosive Media

It is resistant to weak acids and alkalis, but has poor resistance to strong acids (such as concentrated sulfuric acid) and strong oxidants (such as concentrated nitric acid). Contact with these substances will cause a rapid decline in performance.

Prevent Impact from Sharp Objects

Although it is flexible, it may still crack or delaminate if violently impacted by sharp, heavy objects. Avoid rough handling during installation.

Protect from Moisture: Although it has a low water absorption rate, long-term storage or use in high-humidity environments will still cause it to slowly absorb moisture, which may affect its insulation performance. It is recommended to store it in a dry, ventilated place, avoiding direct contact with the ground or walls.

3. Safety and Environmental Protection

Handling During Combustion

Although epoxy boards have some flame retardancy, they produce smoke and a small amount of toxic gases when burning. Therefore, their use in open flame environments is strictly prohibited. In case of fire, use a dry powder fire extinguisher; do not use water.

Waste Disposal

As a thermosetting material, it cannot be recycled or reprocessed. When discarded, it must be treated as industrial solid waste and should not be carelessly discarded or incinerated.

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