Purging Material for injection molding machine (Plastic purging agent)
- Daicel Miraizu

A manufacturer informs us that it would take five days for two people to manually remove the adhered resin.
The resin to be purged is PA6 @ 280℃.

For cleaning, we recommend using two steps of Celpurge AW2 and NX-BS for screw removal.

First, use the Celpurge AW2 to clean PA6 and clean the inside of the cylinder.
Then, wash with NX-BS for screw extraction as well. AW2: NX-BS = 2:1 ratio used without mixing.

It’s easy to clean, improving work efficiency.
We were informed that the cleaning work by two people that previously took five days was completed in only two days.
Also, they informed that the elimination of foreign material has been greatly improved.
This is an example of the excellent cleaning properties of Celpurge.

We received an inquiry from a master batch maker about color change and extruder cleaning in the color masterbatch manufacturing.
The target material to be cleaned is PE pink. The extruder set temperature during PE manufacturing is 190-210℃.

Since it takes a long time to change colors, we proposed Celpurge NX-VN2, which is suitable for cleaning.

In preparation, clean the hopper thoroughly. Before starting the purge with NX-VN2, confirm that no previous material (PE) remains in the cylinder. Remove the extruder screen mesh from the die head.
Set the screw rotation speed to 20 rpm (the maximum is up to 30 rpm), and load 5kg of NX-VN2.
After the purging time of 15 minutes, the extruded resin had no pink color.

Next, in order to remove NX-VN2, 5kg of virgin PE was added.
Gradually it changed to PE, and finally no pink residue or foreign material was detected.

This method was much more efficient in terms of material usage and cleaning time compared to traditional cleaning methods using PE alone. Refer to comparison result (see table).
This is another example of the excellent cleaning properties of Celpurge.