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Stopping static to improve film
November 1st 2008

Static is a problem in film production and high static charges can be generated, particularly at the stretching and winding stages. This was the problem encountered by the Dupont Teijin Films Foshan, China, where a range of PET and PEN polyester films are made. As well as unpleasant shocks to operators, static attracts dust that in turn leads to contaminated stock and the resultant poor quality wound reels may cause feed problems. A cost-effective solution was the installation of a Meech Model 915 AC static elimination system that comprises a static elimination bar powered by a Meech 904 power unit. It provides intense ion production and has fast decay times which means it is effective at fast speeds. It can be fitted at distances to 150mm and has a slim profile.

On one machine where the static elimination bar could not be installed within 150mm of the web, a Meech model 976 Pulsed DC bar with air assist was installed and provides long range ionisation to 600mm. The emitter pin assemblies are easily removable so maintenance can be carried out quickly and easily.

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