What is FR5 epoxy sheet?

What is FR5 epoxy sheet?

FR5 epoxy sheet (Flame Retardant Level 5) is a common fiber glass reinforced epoxy resin insulation material. It is made of epoxy resin and fiber glass cloth.

‌Color: It is usually aqua green or aqua blue.

‌Thickness: A wide range of optional thickness, including 0.8mm, 1.0mm, 1.6mm, 2.0mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm, 8.0mm, 10.0mm, etc.

‌Temperature resistance: Short-term temperature resistance can reach 150℃ and long-term working temperature is 150℃; Short-term heat resistance can reach 260℃‌.

Water absorption: Water absorption ≤0.09%.

Coefficient of thermal expansion: Coefficient of thermal expansion ≤6 x 10^-6 cm/cm°C‌.

Features of FR5 epoxy sheets 

FR5 epoxy sheet can be widely used in electrical, electronic and related industrial fields, mainly due to its following performance characteristics:

Excellent electrical performance: FR5 epoxy sheets have extremely high electrical strength and can maintain stability in harsh electrical environments such as high voltage and high frequency. In addition, the dielectric constant and dielectric loss are low, which is conducive to reducing the energy loss and heating of electrical equipment.

Good flame retardant performance: The FR5 epoxy sheet meets the UL 94 V-0 flame retardant standard. That is, when the material is ignited, it can self-extinguishes in a short time, thus effectively preventing the spread of fire. This performance is essential to improve the fire safety of electrical equipment.

Excellent heat resistance: The FR5 epoxy sheet has a high thermal deformation temperature and long-term service temperature, which can maintain stable physical and electrical properties in high temperature environments. This performance makes the FR5 sheets an ideal choice in high-temperature electrical equipment.

Good mechanical properties: FR5 epoxy sheet has high tensile strength, bending strength and compressive strength. It can withstand large mechanical stress. At the same time, its impact resistance and fatigue resistance are also good, which can ensure the stability and reliability of electrical equipment in the long-term operation process.

Easy to process and shape: FR5 epoxy sheet has good machining performance and plasticity. So it can be easily cut, drilled, bent and formed to meet the requirements of various complex shapes and sizes.

Specific application of FR5 epoxy sheets

Motors and transformers: FR5 epoxy sheets are also widely used in motors and transformers. Its heat resistance and mechanical properties enable it to work stably in high temperature and high pressure environments, ensuring the long-term reliable operation of the equipment‌.

Electronic equipment: FR5 epoxy sheet is also widely used in various electronic equipment, such as PCB testing, electrical equipment insulation structure parts and so on. Its good machinability and moisture resistance make it suitable for use in wet environmental conditions and transformer oils‌.

Rail transit: FR5 epoxy sheet plays a vital role in the rail transit system. Its excellent heat resistance enables it to maintain stable performance in high temperature environments, especially suitable for motors, transformers and other electrical equipment. These equipment will generate a lot of heat during operation, FR5 epoxy sheet can effectively withstand these high temperatures to ensure the safe and reliable operation of the equipment‌. In addition, the FR5 epoxy sheet also has good electrical insulation performance. So it can provide stable insulation protection, reduce signal interference and ensure the smooth and safe operation of the train‌.

FR5 epoxy sheet with its excellent performance characteristics, wide application fields and broad market prospects, has become an indispensable important material in electrical, electronic and related industrial fields. In the future, with the continuous development and innovation in related fields, FR5 epoxy sheets will continue to play an important role in providing a strong guarantee for the stable operation and performance improvement of electrical equipment.