Flowability of capsule filling material

Flowability of capsule filling material

The fluidity of filling material also refers to the smoothness. The variety of filling material is often powder and granule, etc. The fluidity of filling material will directly affect the control of capsule loading accuracy. The Angle of recline, bulk density, particle size distribution and water content of powder or granule have direct influence on its fluidity.

Generally speaking, when the filling powder or granules are piled up, the Angle of recline of granules is smaller than that of powder, so the flow of granules is good, and the filling precision of capsule filling is easy to control. Bulk density refers to the weight per unit volume of powder or granule. In the process of filling, the weight per unit volume is larger, and the fluidity is good. It is also easy to control the accuracy of capsule filling. On the contrary, the weight per unit volume is small, the fluidity is poor, and it is difficult to control the accuracy of capsule filling. In the practice of capsule filling, it is easy to control the accuracy of capsule filling when the bulk density is over 500mg/ml, while it is difficult to control the accuracy of capsule filling when the bulk density is below 450mg/ml.