In injection moulding, even small delays during material or color change can add up to hours of lost production. Deposits of old resin, carbon build-up, or stubborn color streaks inside the barrel and hot-runner slow everything down. This is where using the right Purging Material Injection Moulding makes a clear difference.
Why is Purging Important?
When machines are not cleaned properly, black specs appear in parts and batches of resin get wasted. Instead of pulling the screw or spending too long flushing with virgin resin, a Purging Material removes contamination faster. The result is less downtime and more consistency in output.
Benefits You Can Notice Quickly
With a Reliable Purging Material, you’ll often see cleaner color transitions and fewer rejected parts. Scrap is reduced, and screw pulls become rare because the compound reaches areas that are otherwise difficult to clean. Many processors also find that hot-runners stay in better shape when purging is part of the routine.
What UNICLEANPLUS Provides
UNICLEANPLUS offers both solid grades in pellet form and a liquid emulsion called UC’L’ for injection moulding. The liquid grade can work across a wide temperature range (around 160°C to 420°C), which makes it versatile for different polymers. Their compounds are formulated with emulsifiers and mild cleaning agents that loosen residue without damaging equipment. The company highlights that their products are non-toxic and safe for machine parts.
They also share step-by-step guidance: for solids, use one to two barrel capacities; for the liquid grade, mix a small percentage (about 1–10%) with the running resin and run two to three barrel volumes before switching back to production resin.
How to Approach a Trial
One simple way to see the value is to run a short trial on a machine you use often. Record your scrap rate and time needed for a color change before trying the Purging Material. Then, repeat the same changeover using the UNICLEANPLUS procedure. Compare results — if your purge is faster and the next parts come out clean, you’ll have real proof of the savings.
Asking a few key questions before starting will also help: Which grade suits the resin you use most? How should you adjust backpressure during purging? And what package sizes are available for regular production?
Final Thought
Injection Moulding is competitive, and every minute counts. Using a specialized Purging Material is a practical way to keep machines running smoothly, reduce waste, and maintain product quality. Companies like UNICLEANPLUS not only supply the compounds but also provide free samples and expert guidance to help processors adopt the right purging routine.