A purging compound is a resin-based product designed to clean thermoplastic moulding machines of many types; injection moulding machines, blow moulding machines, and extruders which are used to manufacture plastic parts for a wide range of industries, including automotive, consumer, medical, and many others.
Advantages of Using Purging Compounds
Without a thorough purge between a colour change and/or material change, defects such as black specks or streaking will cause newly manufactured parts to be rejected. Reject parts and machine downtime add up to costly waste for the manufacturer. An ideal commercial purging compound (CPC) is composed of resin pellets blended with proprietary materials and is designed to work with various manufacturing processes and temperatures.
Purging compounds are available to purge commodity materials such as acrylic, polypropylene, polyethylene, polystyrene, polyvinyl chloride, as well as engineering resins such as ABS, polycarbonate, PET, PBT, nylon, TPO, TPE, and many more commonly processed resins.