Product category:
Powder, droplet and particle characterisation
News Release from: Freeman Technology | Subject: Permeability measurement
Edited by the Processingtalk Editorial
Team on 12 January 2006
Automated permeability measurement with
Rheometer
At Interphex 2006 (21-23 March 2006 in New York), Freeman Technology will launch automated permeability measurement with a permeability module for their FT4 Powder Rheometer
At Interphex 2006 (21-23 March 2006 in New York), Freeman Technology will launch automated permeability measurement with a permeability module for their FT4 Powder Rheometer The permeability of a powder is a measure of the ease with which air can pass through it under specified conditions
This article was originally published on Processingtalk on 11 Mar 2003 at 8.00am (UK)
Related stories
Award for novel Powder Rheometer
Freeman Technology has won a Smart Achievement Award for their Powder Rheometer, which aids formulation of new materials, optimises handling and processing, and can provide useful quality control
Powder Flow Rheometers on show at Powtech
New at Powtech 2004 will be a new-generation shear cell accessory for the FT4, a Powder Flow Rheometer which accurately and reproducibly measures the flow properties of powders
It has considerable significance in relation to powder processing, especially the influence that it exerts on a powder's ability to entrain and release air.
These characteristics can greatly affect flow behaviour and process efficiency.
The FT4 Powder Rheometer is a fully automated universal powder tester for the comprehensive characterisation of powder flowability.
The new permeability module uses a pressure transducer to measure pressure drop across the height of a powder bed in the system's test vessel, whilst the air velocity through the powder is controlled.
Importantly, conditioning of the sample before evaluation ensures a homogeneous, stress-free and reproducible packing condition.
Permeability measurements using the FT4 can be conducted in a variety of ways to suit specific requirements.
These include.
* measuring pressure drop versus air velocity at zero bed compression stress.
* using a porous piston to apply specific compression stresses to the sample while maintaining a fixed air velocity through it and measuring pressure drop as a function of the applied bed compression stress.
* maintaining a specific bed pressure drop and measuring the air velocity versus bed compression stress.
The FT4 programme editor allows construction of all the above testing programmes and variants of them.
Once started, the entire test sequence runs automatically.
Comprehensive data analysis enables the rapid production of graphical representations of all the measured data.
• Freeman Technology: contact details and other news
• Email this article to a colleague
• Register for the free Processingtalk email newsletter
• Processingtalk Home Page
Search the Pro-Talk network of sites
