Neutrex Inc. (Booth N67059) is introducing a new commercial purging compound designed for cleaning blown film and sheet lines, at NPE2009.
Houston-based Neutrex says Purgex 461 Plus is a special blend designed for cleaning extruders that are frequently purged, and it may be used in certain lines without removing the screen pack.
Using Purgex 461 Plus will result in shorter cleaning cycles, lower purging-material costs, and greater reliability in controlling the release of contaminants during production runs, the firm said. The compound is recommended for color and material changes, as well as removing residual contamination; cleaning the extruder, screen pack housing, and die/manifold; and removing all types of color bodies, carbonized material and degraded resins. It also can be used for shutdowns. The firm claims the compound also can be used with biodegradable and compostable polyethylene resins.
The product is a blend of linear low density PE carrier and Food and Drug Administration-approved active ingredients that are nontoxic, nonabrasive and safe. Supplied ready-to-use in pellets without fines, the purger has an operating temperature range of 250°-450° F and is easy to remove, the company said.
Purgex 461 Plus is Neutrex's second purging compound for cleaning extrusion equipment and joins a complete Purgex line for cleaning thermoplastic injection molding, extrusion and blow molding machinery.
In other news, Neutrex has compared the use of resins vs. Purgex agents to purge injection molding machinery. A green paper documents laboratory results of purging with five common resins and Purgex 457 Plus, to change colors from black to natural or yellow. Purgex 461, used in the study, is designed to purge glass- or mineral-filled resins, viscous and elastomeric resins.
According to the paper, Purgex decreased downtime by 75 percent, lowered scrap rates by 90 percent, cut the amount of material used to purge by 94 percent and lowered overall purging costs by 76 percent on average compared to all five resins. Resins used were polypropylene copolymer, high density PE, polystyrene, ABS and nylon 6/6.
Whether the cost of petroleum skyrockets again and resin prices go through the roof, or if they stay low due to current market conditions, plastics processors still have to run leaner and more productive to compete in a more challenging global economy, said President Arthur Haag.
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