POLY CLEAR HMEX: HANDLING EXTRUSION CHALLENGES
Poly Clear HMEX can handle the particular challenges of this extrusion process. In pipe extrusion, for example, it can deal with extreme polyolefin changes.
Pipe extrusion, with its demanding materials and die designs and sizes, has always been an enigma to developers of purging compound. How do you design a compound that efficiently clears PE100 from a 500mm basket die, but can also be cleared out of the machine by PE80?
Poly Clear HMEX cut its teeth on PE100 changes, as this is our standard for colour change efficiency. The results were dramatic: Poly Clear HMEX was three times more effective than our previous product for colour changing injection moulded PE100 pipe fittings.
It will allow you to change colour on your basket dies, spiral flow dies or hybrid spiral mandrel/basket dies without having to replace or strip down and clean them manually.
But Poly Clear HMEX is not only for PE100, PE80, it works with all types of polyolefins including, HDPE, MDPE, LDPE and PP.
It’s a similar story for film and sheet extrusion. Poly Clear HMEX6 displays exceptional colour changing performance on polyolefins and TPOs.
The induced turbulent flow and high melt fracture means that the channels employ maximum side wall velocity – dragging the colour out of the machine much faster than natural materials.
Poly Clear HMEX6 has been modified to work with melt and gear pumps. A reduced liquid level helps to banish screw slip, when screw speed varies with pressure.
Poly Clear HMEX6 also removes degraded deposits. The colour change procedure ensures that Poly Clear HMEX6 gets onto the surface of the carbon. A mixture of surfactant release and polymer adhesion boosts carbon loosening during shut-down. At start-up, a quick purge with Poly Clear HMEX6 clears the loosened deposits.