Purging PA(Nylon) or EVOH Extruder

To transition out of PA or EVOH,the average transition time should be about
15-45minutes depending on the size and design of the die.
Once the product yun is over,the operator needs to remove the PA or EVOH from the chute of the
extruder's hopper and tgoroughly clean the hopper by using a vacuum to ensure that all the materials is clean.
It is also an ideal time to clean the hopper's magnet by vacuum and to make sure that
 there are no pellets left hanging in the gravimetric system/blenders.