Materials
Fig. 3. Sanodal dyes offer unsurpassed light and weather fastness which makes them ideal for adding colour to outdoor applications.
market and used in body protection vests. However, before any legal action was required, the company involved approached DSM Dyneema and both parties have since entered into close discussions to resolve and rectify the situation. “This is an important development for the end-user, our
customers, and for DSM Dyneema. It means buyers of ultra- high performance materials like Dyneema, are effectively regulating the supply chain and will not tolerate sub-standard materials for their products and their customers” said Marco Kleuters, area manager life protection EMEA at DSM
Control of flow properties
T
he technique of shear testing has been utilised to optimise the flow behaviour of powdered snack
flavours. The specification of these powders is extremely challenging, with the finished material ‘engineered’ from a mix of blended or co-process ingredients to provide not only the desired taste and fragrance, but also acceptable flow properties. If the flavour is too free-flowing it does not
adhere well to the snack after blending, leading to excessive wastage and dust generation. Yet if the flavour is too cohesive or ‘sticky’ it will not flow reliably into the snack blender, giving inconsistent coating. Traditionally, flow property control has been
26
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Dyneema. “The company, which we cannot name, fully admits to their
actions and they are now committed to fixing the situation. They recognise that only legitimate brands and superior materials like Dyneema will help them succeed in the market and we are looking at how we can work together to resolve this. It is encouraging to see how the market behaves in this manner to ensure that only legitimate, quality products are in the supply chain, and we are pleased to see this being settled without taking legal action,” Kleuters added. ❒
subjective, adding oil to reduce flow of blends considered to dusty or adding free flow to blends considered to ‘sticky’. The Brookfield Powder Flow Tester
(Fig. 1), an automated shear tester has been used to measure the flowability of the snack flavours providing a measurement of the minimum outlet size through which a cohesive or ‘sticky’ powder will flow reliably under gravity. This measurement has been used to quantify the flowability of new snack flavours and to optimise additive levels on a small scale in the laboratory, prior to committing to batch manufacture. ❒
Enter 26 or ✔ at
www.engineerlive.com/ece The Wolfson Centre for Bulk Solids Handling
Technology, University of Greenwich, Chatham Maritime, Kent, UK.
www.bulksolids.com
Fig 1. The Brookfield Powder flow tester.
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