Properties of FR4 Insulation Sheet
FR4 fiberglass sheet is an insulation plate formed by hot pressing after impregnating woven fiberglass cloth with epoxy resin. It boasts excellent insulation performance, high mechanical strength and great temperature resistance, along with antistatic and flame-retardant features. Thanks to its comprehensive properties, it maintains stable dielectric performance in both dry and humid environments, making it one of the indispensable materials for photovoltaic power generation equipment.
Compared with traditional base plates, FR4 Epoxy Sheet features precise dimensional tolerance control and superior surface flatness, providing a reliable carrier for the integration of precision electronic components.
Three Core Advantages
1. Outstanding Insulation Performance – An Insulation Barrier Against Current Leakage
In core components such as photovoltaic panels, photovoltaic inverters and combiner boxes, FR4 fiberglass sheet delivers excellent insulation performance to effectively prevent current leakage, which would otherwise trigger fires and circuit damage. Protected by FR4 Epoxy Sheet, equipment can operate stably for a long time, especially suitable for the complex power grid environment of distributed photovoltaic systems.
2. Superior Mechanical Performance – Robust Structure for Harsh Outdoor Conditions
Photovoltaic modules are exposed to long-term sandstorm impact and mechanical vibration. Featuring high mechanical strength and hardness, FR4 insulation sheet can continuously protect the operation of photovoltaic panels under prolonged sand and wind exposure, lowering the failure rate and maintenance cost of photovoltaic panels and greatly improving system operation and maintenance efficiency.
3. Strong Environmental Adaptability – All-Weather Protection for Photovoltaic Operation
When exposed to corrosive environments with high humidity and salt spray, FR4 Epoxy Sheet relies on the chemical stability of epoxy resin to effectively resist water vapor penetration and ion migration, avoiding risks of tracking and short circuits. For coastal photovoltaic projects in Hainan, Fujian and other regions, FR4 base plates have a far longer service life than ordinary materials, hence becoming the preferred solution for hot and humid coastal areas.
Application Scenarios of FR4 Epoxy Sheet
1. Photovoltaic Inverters
In photovoltaic inverters, FR4 acts as insulating partition plates for circuits. With outstanding insulation and temperature resistance, it protects electrical components from current interference, ensures even heat dissipation, and prevents damage to key components caused by current leakage and fire hazards.
2. Backsheets for Photovoltaic Panels
With excellent insulation, temperature resistance, high mechanical strength, flame retardancy and antistatic properties, FR4 Epoxy Sheet serves as backsheets for photovoltaic panels. It extends the service life of photovoltaic panels and avoids damage to panels resulting from current leakage during power generation.
3. Energy Storage Supporting Facilities
In photovoltaic energy storage systems, FR4 Epoxy Sheet is applied to BMS circuit boards and battery pack insulating partitions. Its flame retardant property blocks the spread of thermal runaway, and customized processing meets complex structural requirements in compact spaces, supporting the miniaturization and high energy density design of energy storage equipment.
YILONG has been deeply engaged in the insulation material industry for forty years, standing as a leading enterprise integrating insulation sheet production and precision processing. Our factory is equipped with multiple automatic production lines and over a hundred precision processing machines, with an independent R&D and technical team to provide one-on-one customized services. Centered on customer demands, YILONG commits to supplying premium products and thoughtful services for global photovoltaic industry clients.
We supply full-spec FR4 Epoxy Sheet with custom cutting, special-shaped machining and technical support for photovoltaic and energy storage projects. If you need technical data sheets, free samples or competitive bulk quotations, please get in touch with us directly:
Email: yilong@yilonginsulation.com
Website: www.yilonginsulation.com
Mob/Whatsapp: +8615866869385
FR4 fiberglass sheet is an insulation plate formed by hot pressing after impregnating woven fiberglass cloth with epoxy resin. It boasts excellent insulation performance, high mechanical strength and great temperature resistance, along with antistatic and flame-retardant features. Thanks to its comprehensive properties, it maintains stable dielectric performance in both dry and humid environments, making it one of the indispensable materials for photovoltaic power generation equipment.
Epoxy Glass Sheet boasts outstanding comprehensive performance, featuring high temperature resistance, corrosion resistance, high mechanical strength, superior machinability, low water absorption, reliable insulation and excellent electrical properties. There are various types of Epoxy Glass Sheet available, including 3240, G11, FR-4, G10 and so on.
Against the backdrop of global energy transition, new energy vehicles are reshaping the landscape of the traditional automotive industry at an unprecedented pace. As core components of new energy vehicles, batteries, traction motors and charging infrastructure have growing demand for insulating materials. As a critical type of insulating material, Insulation Sheet plays an irreplaceable role in the new energy vehicle sector.
Behind the reliable operation of electrical equipment, industrial machinery, renewable energy systems, and modern electronic devices lies a critical yet often overlooked component—insulation materials.
Mica Board is manufactured by bonding mica paper with organic silicone adhesive, followed by heating and hot pressing. It is a high-performance electrical insulation and thermal insulation material. The available colors are typically gold and white.
Mica Paper is widely recognized as a “core material” in high-temperature electrical insulation applications. With its outstanding thermal resistance, electrical insulation performance, and stable chemical properties, it plays a critical role in modern electrical, industrial, and high-tech engineering systems.
In the field of non-standard component manufacturing, material selection often defines the performance limits and application scope of the final product. As a high-performance electrical insulation material, Mica Board is bringing breakthrough solutions to custom-engineered parts across multiple industries due to its outstanding heat resistance, electrical insulation performance, and mechanical stability.
Epoxy Glass Sheet is manufactured using electronic-grade alkali-free fiberglass fabric impregnated with epoxy resin and other modified materials, followed by high-temperature and high-pressure lamination. Epoxy Glass Sheets feature excellent electrical insulation, flame retardancy, high temperature resistance, and strong mechanical performance.
FR-4, which we commonly refer to in the PCB industry, is not actually a specific material name. It is a flame-retardant grade designation.
Phenolic Cotton Cloth Laminate is manufactured by impregnating cotton fabric with phenolic resin, followed by curing under heat and pressure. It is classified as a Thermal Class E insulating material and provides excellent mechanical properties, oil resistance, and reliable dielectric performance.
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