PROCESSING | PURGING COMPOUNDS
Above: Benvic-Dugdale Commercial Director Andy Tombs (right) discusses PVC purging with DucaPurge user Steve Rawse, Managing Director of UK-based Injection Mouldings
cleaning systems are marketed under the Du- caPurge brand worldwide. “Benvic support for our purging compound
range comes at just the right time,” says Andy Tombs, Commercial Director. “DucaPurge com- pounds have been devised to answer the needs of a number of polymer processing niches. Benvic- Dugdale now has sister companies in France, Italy and Spain, meaning that there are opportunities to meet these needs in new market territories as well.” The Dugdale purging strategy is to offer optimised products. “For some time it had been clear that most customers wanted much more than just a ‘one-size fits all’ purging compound. The Dugdale-created range has answered this need – more extensive and often bespoke, all formulated to work in tandem with Benvic’s customised extrusion and injection moulding compounds, and all helping to protect customers’ investment in precision production machinery, and deliver functional cost savings,” he says. Early PVC purge and freeze compounds showed
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thermal stability limitations that fell well short of their intended use in high end rigid PVC applica- tions, where processing temperatures can reach 200°C. These initial purging compounds therefore struggled to provide effective solutions. However, the company says that it drew on its industrial experience and speciality technical knowledge to create a new range of purge compounds for PVC that used the fundamental building blocks of non-lead stabiliser technology to devise a “next generation” compound that offers elevated temperature resistance for extended periods. This makes it suitable for use as either a purge or freeze compound in an extensive range of rigid and flexible PVC materials and applications. “The definition of ‘to purge’ is to remove
abruptly,” says Eric Grange, Benvic Marketing Manager. “This is exactly what the DucaPurge range has been designed to do — remove existing material from equipment as quickly and effectively as possible, therefore reducing downtime on material changeovers, equipment shutdowns and tool changes.”
Benvic-Dugdale says its DucaPurge compound
range reduces machine wear and tear, saves time and waste during material changes, and improves quality by reducing contamination from residues. All combined contribute to a reduction in overall production cost. The DucaPurge compounds cover all PVC transformation processes, including twin-screw extrusion. The compounds also provide a manufacturing solution to the thermal stability issues experienced with processing of recycled PVC grades.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.dynapurge.com �
www.rapidpurge.com �
www.asaclean.com �
www.polytechs.fr �
www.dugdalepvc.com
IMAGE: BENVIC-DUGDALE
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