In the fields of electrical engineering and high-performance materials, the choice of epoxy fiberglass panels can significantly affect the performance and safety of various applications. Since there are multiple options available, such as G10, G11, FR4, and FR5, it' s important to fully understand their features in order to make the most informed choice. In this blog post, Hangzhou Blue Sun will share how to choose the right epoxy glass fiber sheet.
Understanding the Basics
Epoxy glass fiber sheets are composite materials made FRom woven fiberglass substrates and epoxy resins. They offer a balance of mechanical strength, electrical insulation, and thermal stability, making them ideal for a variety of applications.
G10: The Non-Flame Retardant Workhorse
G10 epoxy fiberglass laminate is a halogens-FRee epoxy resin binder combined with a woven fiberglass substrate. It is renowned for its excellent electrical insulation qualities and high mechanical strength in both wet and dry conditions. With a flexural strength of ≥ 340 MPa and an electric strength of ≥ 35 Kv, G10 is a robust choice for cryogenic and structural applications where halogenated compounds are unwanted. Its UL94-HB rating indicates that it is less resistant to combustion, making it suitable for applications where flame resistance is not a primary concern.
G11: The High-Temperature Contender
G11 epoxy fiberglass laminate is similar to G10 but is designed to operate at higher temperatures. It offers excellent mechanical strength at room temperature and maintains this strength up to 155°C. G11's insulation resistance after immersion in water is remarkable, with a value of ≥ 5*(10²*10²) MΩ, which is crucial for applications where the material may be exposed to moisture. Its 94-HB combustibility level is similar to G10, but its ability to resist dimensional change, flow, and chemicals, along with its low moisture absorption, makes it an excellent choice for applications in harsh environments.
FR4: The Flame-Retardant Generalist
FR4 is a laminate sheet made FRom a woven fiberglass substrate and a flame-retardant epoxy resin. It is an excellent generalist material that offers reliable and cost-effective electrical and mechanical performance for most use cases. With a flexural strength of ≥ 340 MPa and an electric strength of ≥ 35 Kv, FR4 is a popular choice for PCB manufacturing and other electrical applications where flame resistance is a necessity. Its UL94-V0 rating signifies a high level of flame retardancy, making it suitable for applications where fire safety is of paramount importance.
FR5: The High-Temperature Flame-Retardant
FR5 is designed for higher operating temperatures, maintaining its insulating and mechanical properties up to 150°C. It is similar to FR4 but with enhanced properties to withstand the rigors of high-temperature environments. FR5's 94-V0 combustibility level ensures flame resistance, and its ability to maintain properties in dry and humid conditions makes it a preferred material in the automotive industry and other applications where high temperatures and safety are critical.
Making the Right Choice
When selecting the appropriate epoxy glass fiber sheet, consider the following factors:
1. Operating Temperature: If your application will be exposed to high temperatures, G11 or FR5 may be more suitable due to their higher temperature ratings.
2. Flame Resistance: For applications where fire safety is a priority, materials with a UL94-V0 rating like FR4 and FR5 are ideal.
3. Environmental Conditions: If the material will be exposed to moisture or chemicals, G11's resistance to dimensional change and chemicals, along with its low moisture absorption, makes it a strong contender.
4. Halogen Content: For applications that require a halogen-FRee material, G10 is the go-to choice.
By carefully considering these factors and understanding the unique properties of each material, we can help you select the most appropriate high-performance material to ensure your project achieves the optimal balance of performance, safety, and reliability.
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