923 silica (Nanji)

Precipitated silica (wet), the formula SiO2? NH2O, also known as hydrated silica. Can improve the strength, abrasion resistance, the tread can be improved resistance to mechanical damage, and holding performance, but also increase the compound and steel cord adhesion. The higher the surface area, the finer the particles, the more active, the strength of vulcanized rubber, tear strength, abrasion resistance is high, but decreased elasticity, viscosity, poor processability. Typically 1% to 2% of silicon sixty-nine to modification, the modified alternative high abrasion furnace black, physical and mechanical properties considerably, can reduce the heat, but also to improve the resistance to aging. Microporous, strong adsorption, hydrophilic strong. It is best to join alone or mixed with zinc stearate depolymerization rubber, plus other ingredients, to ensure dispersion of other compounding ingredients. Fumed silica at high temperatures generated, also known as anhydrous silicic acid, it is a high-purity ultra-fine silica, compared with the wet, higher viscosity, but vulcanized rubber hardness, strength, modulus, elongation long rates and better transparency of rubber. Mainly used for silicone rubber silicone plant, feed mill, pesticide factory, cosmetics factory.