Powder behaviour studied under vacuum

摘要

The latest accessory for Freeman Technology's FT4 powder rheometer allows the flow properties of powders to be studied under vacuum. Reducing the air pressure, and hence the entrained air in the powder, can lead to dramatic changes in flowability. Since a number of unit operations in powder processing may be carried out under vacuum, including drying, filtration, pneumatic transfer and dosing, it is important to understand the behaviour of powders under these conditions.