In industrial manufacturing, electronics, and electrical fields, the thermal stability of insulating materials directly affects product performance and lifespan. When facing high-temperature environments during design or production, selecting insulating materials that combine heat resistance and comprehensive performance is crucial. Among various engineering materials, G11 epoxy glass cloth laminate stands out for its outstanding performance, making it a suitable solution for applications requiring high heat resistance. This article will introduce the heat resistance characteristics, core advantages, and typical applications of G11 material to help you determine if it meets your project requirements.
G11 is a thermosetting laminate made by impregnating alkali-free electronic glass cloth with epoxy resin and then laminating it. It meets the G11 rating in the NEMA (National Electrical Manufacturers Association) standard, maintaining good performance in high-temperature environments. Compared to ordinary FR-4 epoxy materials, G11 undergoes a special high-temperature post-curing treatment, resulting in a more stable molecular structure that allows it to operate normally in higher temperature environments.
The typical operating temperature for G10 and FR4 is 130℃.
G11, however, can operate stably in high-temperature ranges above 155℃.
In high-heat electrical equipment, G11 offers a longer service life and more stable performance.
Most materials soften or lose strength when heated. However, G11 retains strong bending strength and impact toughness under high-temperature loads. This is crucial for equipment requiring structural support, such as transformers and motors.
G11 has high dielectric strength and excellent insulation resistance, maintaining stable dielectric properties even in humid environments.
G11 is oil-resistant, chemically resistant, and moisture-resistant, making it suitable for harsh environments.
♦ End Insulation Components
♦ Corner Protectors, Support Components
♦ High-Temperature Insulation Structural Materials
In high-temperature winding areas and areas with insufficient heat dissipation, G11 maintains long-term dimensional stability and insulation strength, making it suitable for high-heat-load areas such as rectifier transformers, traction transformers, and boiler transformers.
♦ Slot Wedges
♦ Insulating Gaskets
♦ End Cover Structural Components
Its features include high-temperature resistance, fatigue resistance, and vibration resistance, ensuring stable operation of motors under continuous high loads and humid and hot environments, extending equipment lifespan.
♦ Insulating Partitions
♦ Supporting Components
Due to its excellent resistance to arc heat and temperature rise, it maintains reliable mechanical support and insulation performance during switch operation, arc impact, and short-term high-temperature environments, improving overall safety.
For many familiar with circuit board substrates, FR-4 is a more common option. However, G11 has the edge in heat resistance:
FR-4: The long-term operating temperature of standard FR-4 is approximately 130°C (Tg point is typically 130-140°C).
G11: Long-term operating temperature can reach 150°C (Tg point is typically above 150°C).
Therefore, when the ambient temperature of your application exceeds the tolerance limit of FR-4, upgrading to G11 is a wise choice.
When selecting G11 material, we recommend paying attention to the following key points:
♦ Is the resin system a heat-resistant epoxy resin?
♦ What is the density and fiber content of the laminate?
♦ Does it meet the flexural strength requirements under high-temperature conditions?
♦ Does it possess relevant certifications such as UL, RoHS, and REACH?
♦ Does the supplier have industrial-grade mass production capabilities?
If you need a reliable insulation material suitable for high-temperature, high-strength applications, G11 epoxy glass cloth laminate is a suitable choice. It meets the requirements in terms of heat resistance, mechanical properties, electrical properties, and chemical stability. Choosing the right material ensures product reliability.
Contact us to obtain technical parameters, samples, or customized solutions for G11 material to meet the high-temperature requirements of your project.
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