Materials: Purging Compounds for Polyolefins and Engineering Resins
Chem-Trend’s new purging agents are both ready-to-use granular compounds.
Two new purging compounds tailor-made for thermoplastic processors were newly presented as the latest addition to the Ultra Purge product line byChem-Trend, Howell, Mich. Both are ready-to-use granular compounds designed to clean barrels, nozzles and hot runners of injection molding machines.Ultra Purge 5150 formulation is said to be ideal for cleaning polyolefin resins, which 5160 compound is designed specifically for engineering resins. Each product is said to be highly efficient as well as operator and equipment safe, with a wide application rate
There are many techniques known to operators and plant engineers for increasing the performance of a twin-screw compounding extruder.
With vented extrusion, small amounts of melt can hang up on the screw and degrade, eventually resulting in streaks or specks that hurt the appearance of the extruded product.
Proper purging procedures can avoid the need to shut down the line for cleaning. Here's one expert's advice.