400 mesh active silica powder combines the dual advantages of the moderate fineness of 400 mesh silica powder and surface activation treatment. Its activation process requires precise control of the type, amount, treatment temperature, and method of the coupling agent to ensure the formation of a uniform, monomolecular layer coating on the particle surface, avoiding excessive residual coupling agent or incomplete coating. After activation, the powder surface changes from hydrophilic to hydrophobic (lipophilic), greatly increasing its affinity with organic systems.
The performance characteristics of this product are distinct. Due to its reduced surface energy, its dispersibility in polymer melts or liquids is greatly improved, effectively preventing performance inhomogeneity caused by powder agglomeration. The strong interfacial bonding force with the matrix means that stress can be transferred more effectively, thus fully utilizing the reinforcing effect of the filler. 400 Mesh Active Silica Powderesh Mesh Active Silica Powder is mainly used in various epoxy insulation products in the power industry, such as epoxy resin instrument transformers, insulators, SF6 insulation shells, bushings, contact boxes, solid-sealed poles, sensors, capacitors, reactors, bending plates for switchgear, and circuit breakers used in high-speed rails. In engineering plastic modification, adding 400 mesh active silica powder can simultaneously improve material strength, rigidity, heat deflection temperature, and dimensional stability, with a relatively small negative impact on toughness, achieving a good balance. In high-performance rubber products, such as oil seals, sealing rings, and rubber rollers, it provides excellent wear resistance, tear resistance, and medium resistance. In the coatings field, especially industrial coatings with high requirements for adhesion, hardness, and corrosion resistance (e.g., automotive primers, container coatings), active silica powder can significantly enhance the comprehensive performance of the coating. Furthermore, it is also an important reinforcing component in SMC/BMC molding compounds and friction materials (brake pads). 400 Mesh Active Silica Powder is an active filler that achieves an excellent balance between cost-effectiveness and performance enhancement, widely used in the manufacturing of demanding industrial components.
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