With the trend of upgrading electrical equipment to higher temperatures, higher pressures, and higher reliability, silicone resins have redefined the industry standards for H-class insulation materials. With a semi-inorganic and semi-organic structure based on Si-O-Si as the main chain, it achieves a perfect integration of organic and inorganic properties, becoming the core material in the high-end insulation field.
Silicone resins have broken through the performance bottlenecks of traditional H-class insulation materials. They possess excellent wide temperature stability, with a long-term usage temperature ranging from -60°C to 200°C, and short-term tolerance to temperatures above 250°C. The weight loss rate at high temperatures is much lower than that of traditional materials such as epoxy resins. The core electrical insulation performance is particularly outstanding, with an electric breakdown strength of 50 kV/mm, a volume resistivity of 10¹³ - 10¹⁵ Ω·cm, and low dielectric constant and loss. It maintains stable insulation performance over a wide frequency range.
At the same time, its comprehensive performance has fully upgraded the standard requirements. It has strong hydrophobicity and a water absorption rate lower than 0.5%, preventing creepage in humid environments; it is resistant to ultraviolet rays and ozone aging, and is less prone to powdering and cracking in outdoor use; it has arc resistance and anti-crown characteristics that can delay insulation deterioration, combined with excellent adhesion to various substrates, ensuring long-term reliability. It is also more in line with environmental protection standards, with no harmful by-products during curing, and burning only generating silica ash.
From aerospace to new energy vehicles, from high-voltage motors to photovoltaic equipment, silicone resins, with their heat resistance, weather resistance, and efficient insulation advantages, have pushed the application boundaries and safety thresholds of H-class insulation materials to new heights, becoming an indispensable core support for high-end electrical equipment.