Planetary Centrifugal Mixer Solves Uniform Dispersion Issues of High-Temperature Sealant

High-temperature sealant is a critical material for engines, exhaust systems and other high-temperature working conditions, with its performance directly impacting equipment sealing, durability and safety. High proportions of high-density solid fillers are essential for its performance improvement, yet uniform dispersion of fillers and bubble removal remain tough production challenges. SMIDA planetary centrifugal mixer offers a key technical solution to these problems, effectively realizing uniform mixing and thorough defoaming of high-temperature sealant, and ensuring the stable high-temperature performance of the product.

High-temperature sealant requires filling with silicon micropowder, alumina, boron nitride and other high-density solid fillers to enhance its heat resistance, thermal conductivity and mechanical strength. However, achieving uniform dispersion of these fillers in silicone rubber or epoxy resin matrix is extremely challenging: fillers are prone to sedimentation and agglomeration, and bubbles are difficult to eliminate. These issues will cause local cracking, thermal conduction path interruption or sealing failure of the sealant in high-temperature environments, becoming a core bottleneck in the production process.

SMIDA planetary centrifugal mixer provides crucial technical support for solving this industrial problem. The equipment relies on the combined action of centrifugal force from revolution and high shear force from rotation to realize powerful stirring and efficient dispersion of high-viscosity sealant materials. Its non-contact mixing method without stirring paddles avoids impurity introduction or material denaturation caused by friction, and can completely break up filler agglomerates, ensuring full wetting of nano or micron-grade powders with the matrix.

What’s more, SMIDA planetary centrifugal mixer maintains a continuous vacuum environment during operation, which can efficiently remove air bubbles introduced during the mixing process and avoid pore defects formed during high-temperature curing. Under vacuum conditions, fillers can achieve denser packing, significantly improving the compactness and mechanical strength of the sealant. The equipment is widely applicable to the mixing of silica gel, epoxy resin with various fillers, including high-viscosity conductive silver adhesive, insulating adhesive and special high-temperature sealing materials.

SMIDA planetary centrifugal mixer integrates planetary stirring and vacuum defoaming technology, enabling materials to be mixed in an oxygen-free and dust-free environment. The final high-temperature sealant products obtained are uniform in texture, free of sedimentation and bubbles, and can stably maintain excellent sealing, thermal conduction and insulation performance even in harsh high-temperature working conditions.