Importance of Viscosity of Silicone Thermal Potting Compound

Since thermal conductive silicone potting compound has good high and low temperature resistance, weather resistance, corrosion resistance and electrical properties, it is widely used in the sealing and encapsulation of electronic appliances. At present, two-component silicone potting compound is generally used for encapsulation of LED display modules or light strips. Since the distance between LED module lights is narrow, many are between 3 and 10 mm, the viscosity of the silicone potting compound is relatively high, generally controlled at about 2000 mPa·s. As a basic performance indicator of silicone thermal encapsulant, the importance of viscosity is self-evident.

The viscosity of the silicone potting compound directly affects its fluidity and permeability. During the encapsulation process of LED display modules or light strips, the appropriate viscosity can ensure that the colloid is evenly filled into every tiny gap to achieve a perfect sealing effect. The viscosity of our company's silicone thermal potting compound is controlled at about 2000 mPa·s. This viscosity range makes the colloid have good fluidity, which is convenient for encapsulation operations, while maintaining sufficient filling capacity to ensure that the encapsulated product has good sealing and protection.

Viscosity and temperature changes

Temperature is an important environmental factor that affects the viscosity of potting compound. Under low temperature conditions, molecular movement slows down and the viscosity of the colloid increases, which may cause the fluidity of the potting compound to deteriorate slightly and affect the potting effect. Under high temperature conditions, molecular movement accelerates, viscosity decreases, and colloid fluidity increases, but too low viscosity may cause powder oil separation and even agglomeration.

As a manufacturer of silicone thermal conductive potting compound, Volsun achieves good fluidity and filling capacity by precisely controlling viscosity. At the same time, by optimizing the amount and selection of inert oil, it effectively controls the problem of low-temperature oil leakage and ensures the performance stability of the product in a variety of environments.