ANNUAL REVIEW Solids Mixing

Abstract

Solidsmixing or solids blending is the operation by which two or more solid materials in particulate form are scattered randomly in a mixer among each other by the random movement of the particles. It has long been one of the most widely used industrial, agricultural, and pharmaceutical processes. However, it has been much less developed both theoretically and practically compared to other processes. Therefore, the practice of art often dominates in the operation and design of the mixing equipment and in the assessment of quality of a mixture. The rapid growth of other process industries has made solids mixing a well recognizedbut not yet well developed operation. A considerable amount

Correlation between rheological and mechanical properties of black PE100 compounds – Effect of carbon black masterbatch

“…In other words, before melting and homogenization of components in twin extruder, carbon black masterbatch must be effectively distributed in the PE100 powder in pre-mixing dry blending stage. Therefore, for avoiding the segregation and achieving good blending, it is suggested that the bulk density and morphology of masterbatch and polyethylene powder must be similar [17][18][19]. As it is shown in Figure 2a and Table 1, MR and MK samples have irregular powder morphology and low bulk density of 0.405 and 0.460 g/cm 3 respectively, which facilitate their dry mixing with PE100 powder with bulk density of 0.431 g/cm 3 .…”

Dry mixing and coating of powders

“…Fan et al [7] reviewed the common sampling techniques that have been employed to assess the homogeneity of solids mixtures. The most common method of sampling is perhaps by thief probé, its main drawback being the disturbance caused by inserting the probé into the mixture [9] and the possibility of removing non-representative samples from segregating mixtures 4 .…”

Quantitative Evaluation of Drug Distribution in Tablets of Various Structures via Raman Mapping

“…A more rational way is to compare the maps of real samples to a perfectly homogeneous ideal sample. Common definition of a perfectly random mixture defines the probability for finding a particle of a constituent identical at all points in the mixture [12]. Unlike a liquid mixture, the pixels of a Raman image in solid sample differ from each other depending on the particle size of the component.…”