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G11 epoxy fiberglass material is a rigid sheet material made by impregnating fiberglass cloth with epoxy resin and then laminating and curing it under high temperature and pressure. This material belongs to the “G10/G11” series in the NEMA standard, where G11 specifically refers to the category that can maintain good mechanical properties under high-temperature environments.
G11 epoxy Composites exhibits the following heat resistance characteristics:
Long-term operating temperature: Not lower than 155℃ (Class F grade)
Short-term withstand temperature: Up to 180℃
Under high-temperature operating conditions, G11 material is not prone to softening, delamination, or carbonization, making it suitable for high-temperature insulating structural components.
In high-temperature environments, G11 Epoxy Fiberglass Composites maintains the following electrical properties:
High dielectric strength
Low dielectric loss factor (good Dk/DF stability)
Good arc resistance and tracking resistance
These characteristics enable G11 Epoxy Fiberglass Composites to effectively isolate conductors in high-temperature electric fields, preventing insulation breakdown and aging.
While most insulating materials soften and lose strength at high temperatures, G11 Epoxy Fiberglass Composites exhibits the following characteristics:
High retention of flexural and compressive strength at high temperatures
Good creep resistance
Structural dimensional stability under long-term loads
This is of great significance for insulating supports that simultaneously bear electrical and mechanical loads.
G11 machined part possesses the following characteristics in terms of thermal stability and aging resistance:
Long thermal aging life
Unrestricted cracking under temperature cycling conditions
Unrestricted from powdering or delamination during long-term use
In equipment requiring continuous operation, such as transformers and motors, using G11 Epoxy Fiberglass Composites help extend the service life of the insulation system.
G11 machined part is used as slot wedges, insulating partitions, end supports to ensure insulation safety in high-temperature environments.
Suitable for insulating structural components in switchgear, circuit breakers, instrument transformers, etc.
G11 machined part can be used to manufacture high-temperature test fixtures, PCB support boards, insulating carriers, etc.
Used for insulation protection in high-temperature environments such as hot presses, drying equipment, and high-temperature furnaces.
To ensure reliable performance of G11 Composites in high-temperature insulation applications, the following aspects should be noted during machining:
Precision Cutting and CNC Machining: Control dimensional accuracy, maintain smooth edges, and avoid delamination and burrs.
Drilling and Tapping: It is recommended to use carbide tools to reduce wear on the tools caused by the fiberglass.
Surface Treatment: Polishing, chamfering, or spraying can be performed as needed.
Quality Inspection: Includes dimensional inspection, electrical performance testing (such as withstand voltage testing), and temperature resistance testing to ensure product compliance.
With its high temperature resistance, high insulation, and excellent mechanical properties, G11 epoxy fiberglass components have become important insulation components in various high-temperature, high-reliability applications. Proper material selection, precision machining, and rigorous quality testing are key to ensuring long-term stable operation.
If you require custom-made insulation Composites with high temperature resistance and high strength, Ztelec Group can provide epoxy fiberglass sheet selection and precision machining services.By providing drawings and tolerance requirements, we can customize high-precision insulation material processing parts according to your needs and provide technical support.
Please feel free to contact us for technical consultation and quotations.
