Automated Analyzer measures particle size/shape in toners.

Press Release Summary:

Sysmex FPIA-3000 measures particles from 0.8-300 microns and provides size and shape information for each. Using CCD camera, system produces images of each particle and provide scattergram of shape index versus particle size within 2.5 min. Camera captures 60 images/sec and analyzes them in real-time. To ensure largest area of particle is oriented toward camera and all particles are in focus, sheath flow cell transforms particle suspension into narrow or flat flow.

Original Press Release:

Sysmex FPIA-3000 from Malvern Instruments Measures Particle Size and Shape in Toners

With the development of wet chemistry methods for the production of print toners, information about particle shape as well as particle size is becoming increasingly important. The Sysmex FPIA-3000 automated particle size and shape analyzer from Malvern Instruments is now widely used in the industry to provide valuable data essential for optimizing both production and the products themselves.

Conventionally toners have been produced using a pulverization process. Particle size can be controlled to within +/- 0.3 - 0.5 mm for material with an average size of 8 mm: size distribution can also be controlled. Newer processes based on suspension or emulsion polymerization have introduced a requirement for much closer control of particle shape and material properties, as well as particle size.

The fully automated Sysmex FPIA-3000 can measure particles in the range 0.8 to 300 microns and delivers both particle size and shape information. Using a CCD camera, the system produces images of each particle and provides a scattergram of shape index versus particle size in just 2.5 minutes.

Samples pass through a sheath flow cell that transforms the particle suspension into a narrow or flat flow, ensuring that the largest area of the particle is oriented towards the camera and that all particles are in focus. The CCD camera captures 60 images every second and these are analyzed in real time. Numerical evaluation of particle shape is derived from measurement of the area of the particle. A number of shape factors are calculated including circularity, aspect ratio and circle equivalent diameter. All measurements are stored, as are the particle images, and the system provides comprehensive data analysis and display parameters, together with a variety of options for data output.

About Malvern Instruments
Malvern Instruments is a global company that develops, manufactures and markets advanced analytical systems used in characterizing a wide variety of materials, from bulk powders to the latest nanomaterials and delicate macromolecules. Innovative technologies and powerful software produce systems that deliver industrially relevant data enabling customers to make the connection between micro (eg particle size) and macro (bulk) material properties (rheology) and chemical composition (chemical imaging). Malvern laboratory, on-line and in-line solutions are proven in sectors from cement to pharmaceuticals and support the understanding, improvement and optimization of many industrial processes.

Headquartered in Malvern, UK, the company has subsidiary organizations in all major European markets, North America, China, Korea and Japan, key partnerships in India, a global distributor network and a number of applications laboratories around the world.

Please send sales enquiries to:
Alison Vines, Malvern Instruments Ltd
Enigma Business Park, Grovewood Road, Malvern, Worcestershire WR14 1XZ UK
Tel: +44 (0) 1684 892456; Fax: +44 (0) 1684 892789

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