From the appearance point of view, domestic products are mainly divided into three structures and compositions, which are powdery, microbeads and large particles. Whether in the form of large particles, microbeads, or powders, it is present in the form of most flocculents or flocculated forms. Large particles are in the form of flakes and strips, and the volume is larger than a few cm3. It is mixed with some fine powders with a general particle size of 500 microns or more. It is an environmentally friendly white carbon black.
The processed granulated white carbon black particles, especially in terms of moisture and pH, are quite stable, and greatly increase the stability of the storage period of the white carbon black, but the price is high. Domestic brands such as Nanping Jialian's VN2GR, VN3GR, Hengcheng Silicon's 822GR, 833GR, Luodi's Zeosill75, Zeosil195, etc., world brands Adidas, NIKE and other companies have already designated. The microbead-like floc is relatively uniform, generally in the range of 200-300 microns, and the dust flying is much better than the powder in the mixing. The powder-like floc is below 300 microns, the size is uneven, and there are also some aggregates or aggregates, so the dust pollution during operation is more serious. At the same time, the micro-bead-like and powder-like white carbon black has a relatively high water rise during storage. As the storage time is prolonged, the surface activity decreases, and the pH value tends to increase, so that the vulcanization rate of the rubber compound is accelerated and vulcanized. Unstable.