- Fully automated test programs and data analysis
- Conditioning mode provides unparalleled repeatability
- Range of sample size, 10ml to 160ml (in addition a 1ml Shear Cell is available)
How it works
The FT4 employs unique technology for measuring the resistance of the powder to flow, whilst the powder is in motion. A precision ‘blade’ is rotated and moved downwards through the powder to establish a precise flow pattern. This causes many thousands of particles to interact, or flow relative to one another, and the resistance experienced by the blade represents the difficulty of this relative particle movement, or the bulk powder flow properties.
Powders are complex materials. Often perceived as just a collection of particles, they are in fact a complex mixture of solids, liquids and gases (to learn more please visit our Powder Rheology page). The behavioural characteristics of these unique materials are difficult to model and predict. Dynamic powder flow testing offers excellent reproducibility and sensitivity, this is achieved by moving the blade in a precise and reliable way. The advanced control systems of the FT4 accurately set the rotational and vertical speeds of the blade, which defines the Helix Angle and Tip Speed.
The properties measured include Basic Flowability Energy (BFE), which quantifies confined powder flow behaviour, or forced flow, and is measured during a downward traverse of the blade. Specific Energy (SE), quantifies unconfined powder flow properties, or gravity flow, measured by rotating the blade upwards through the sample, and is particularly relevant for predicting powder flow in low stress applications, such as gravitational filling.
Powder Flow Solutions from Freeman Technology
Presentation - Working with Powders: How Comprehensive Characterisation can Optimise your Process
FT4 Powder Rheometer Methodologies
The FT4 is a truly universal powder flow tester, with four categories of methodologies, defined as Bulk, Dynamic Flow, Shear (in accordance with ASTM D7981) and Process.
The FT4 has application in all powder processing industries, including Pharmaceuticals, Fine Chemicals, Food, Cosmetics, Toners, Metals, Ceramics, Plastics, Powder Coatings, Cements and Additive Manufacturing. Applications extend to:
- Die / Capsule Filling
- Tablet Compression
- Hopper Flow
- Wet Granulation End Point & Scale Up
- Flow Additive Selection & Optimisation
- Humidity Effects
- Electrostatic Change
- Mixing / Blending
- Dry Powder Inhalers
- Wall Friction & Adhesion
- Hopper Design
- Compact Hardness & Payoff
- Vacuum Filling
Whether your objective is to optimise a formulation in a development environment, predict in-process performance, understand batch differences, or to ensure the quality of raw materials or intermediates, the FT4 will provide valuable and unique information that will help you address your powder flow challenges.
Please click on the images below for more in-depth information