FR4 epoxy fiberglass sheet is a versatile and reliable material in the field of electrical insulation and structural reinforcement. In this blog post, Hangzhou Blue Sun will share the benefits of FR4 epoxy fiberglass sheet for sale. This versatile laminate distinguishes itself with its superior performance, becoming an indispensable component in a variety of electrical and mechanical applications.
What is FR4 Epoxy Fiberglass Sheet?
FR4, or Flame Retardant 4, is a type of laminated material made from woven glass fibers soaked in an epoxy resin. This composite material is then cured under heat and pressure to form a rigid, durable sheet. The "FR" in its name indicates that it has been treated to resist ignition and slow the spread of flames, making it ideal for applications where fire safety is a priority.
Superior Insulation and Strength
FR4 glass epoxy, a woven fiberglass substrate infused with a flame-retardant epoxy resin, offers remarkable insulation resistance and mechanical strength. With a flexural strength of ≥ 340 MPa, perpendicular to laminations, it ensures robust structural integrity. This attribute is crucial in applications where the material is subjected to significant mechanical stress, such as in the construction of circuit boards and electrical insulation components.
Impact Resistance and Electric Strength
The Charpy impact strength of FR4, measured at ≥ 33 KJ/m² parallel to laminations, highlights its ability to absorb and withstand shock without compromising its structural integrity. This is particularly beneficial in environments where physical impacts are a concern. Moreover, its electric strength of ≥ 35 Kv perpendicular to laminations, tested at 90℃ in 25# transformer oil, underscores its reliability in high-voltage applications, making it a preferred choice for electrical insulation in transformers and other power equipment.
Thermal and Moisture Resistance
FR4's insulation resistance after immersion in water, rated at ≥ 5*(10²*10²) MΩ, is a testament to its resilience against moisture. This resistance is critical in humid conditions where many materials would succumb to performance degradation. Coupled with its UL94-V0 level combustibility rating, FR4 ensures safety and reliability in applications where fire hazards are a concern.
High-Temperature Performance
The material's high mechanical strength at medium temperatures and its electrical performance stability at high temperatures, up to 130℃, make it ideal for use in environments with fluctuating thermal conditions. This stability is essential in applications such as aerospace, automotive, and industrial electronics, where components are exposed to a wide range of temperatures.
Industry Applications
FR4 epoxy fiberglass sheets are widely used in the manufacturing of printed circuit boards (PCBs) due to their excellent electrical and mechanical properties. Their ability to provide reliable insulation in both dry and humid conditions makes them suitable for a broad spectrum of electronic devices. Furthermore, their good fabricating characteristics facilitate the production of complex PCB designs with precision and ease.
Conclusion
The FR4 epoxy fiberglass sheet's multifaceted benefits make it a standout material in the electronics industry. Its combination of high mechanical strength, impact resistance, electric strength, and resistance to heat and moisture positions it as a go-to solution for a variety of applications. As technology continues to advance, the demand for materials like FR4 that can meet these stringent requirements is only set to grow, solidifying its place as a cornerstone in modern electronics manufacturing.
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