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The process of dispersion Carbon black
- Jul 11, 2018 -

The process of dispersing carbon black into raw rubber or plastic glue, firstly, rubber penetrates into the voids of carbon black agglomerates to form a high concentration of carbon black-rubber aggregates, which are dispersed in raw rubber or plastic glue without carbon black. Then, these carbon black-rubber aggregate agglomerates are cleaved under a sufficiently large physical shearing or stretching force, and the agglomerates gradually decrease and gradually mix until fully dispersed. In the carbon black-rubber aggregate agglomerate, the aggregate formed by carbon black has a cohesive force of physical adsorption inside, and the clump can only be obtained when subjected to physical shearing or stretching force greater than the cohesive force of the physical adsorption. Open it. Since the shearing or stretching force required for the deformation of the raw rubber or the plasticized rubber is related to its viscosity, it is required to overcome the physical cohesion of the carbon black agglomerates, and the raw rubber or the plasticating rubber is required to have a certain viscosity. With the development of the dispersion process, the raw rubber or plastic compound contained in the carbon black is gradually reduced, and the viscosity of the rubber material is gradually decreased. The carbon black dispersion and the number of fine particles increase, the contact area between carbon black and raw rubber or plastic compound increases, and the elastic recovery value of the rubber increases gradually. When this value no longer increases, it indicates the end of the dispersion process.