How to make the internal mixer disperse more evenly? Like Rubber Internal Mixer, in order to improve the performance of rubber products, improve the performance of rubber technology and reduce costs, various compounding agents must be added to raw rubber. Mixing is the process of uniformly mixing raw rubber and various compounding agents through mechanical action. If the refining is not good, there will be uneven dispersion of the compounding agent in the rubber material, too low or too high plasticity of the rubber material, scorching, blooming and other phenomena, which will make it difficult to carry out the follow-up process normally and lead to a decline in the performance of the finished product. Due to the high viscosity of raw rubber, in order to uniformly mix and disperse various compounding agents, it must be mixed with the help of strong mechanical action of the rubber mixer. Various compounding agents, due to their different surface properties, have different reactivity to rubber. Inconsistent. In addition to the regular ones, there is also the Plastic Granulator. According to surface characteristics, compounding agents can generally be divided into two categories: one is hydrophilic, such as carbonate, clay, zinc oxide, lithopone, etc.; the other is hydrophobic, such as various carbon blacks. The surface properties of the former are different from raw rubber, so it is not easy to be wetted by rubber; the surface properties of the latter are similar to raw rubber, and are easy to be wetted by rubber. In order to obtain a good mixing effect, the surface of the hydrophilic compounding agent must be chemically modified to improve their activity with rubber, and the use of surfactants can play this role. Surfactants are mostly organic compounds with asymmetric molecular structures. It often contains polar groups such as -OH, -NH2, -COOH, -NO2, -NO or -SH, has unsaturated residual valence, is hydrophilic, and can produce strong hydration; in addition, their molecules There are also non-polar long-chain or benzene ring hydrocarbon groups in the structure, which are hydrophobic. Therefore, when the surfactant acts as an intermediary between the compounding agent and the rubber, the mixing effect of the compounding agent in the rubber is improved. The width of the molecular weight distribution of raw rubber has an important influence on the mixing performance. The factors affecting the dispersion of carbon black in rubber are not only the rubber itself, but also the size, structure and surface activity of carbon black particles. Therefore, the finer the carbon black particles, the more difficult it is to disperse in rubber. High-structure carbon black The gap is large, the concentration of the contained glue formed in the initial stage of steel mixing is low and the viscosity is high, and a large shear stress is generated in the subsequent mixing, so it is easier to disperse. We have Extrusion Pelletizer on sale, please contact us if you are interested. We have many years of production experience, even better.
