Extrusion Blow Molding Material Change with EasyPurge Purging Compound
PA to HDPE Material Change
Goal: PA to HDPE Material change and Black Specks Removal
Extruder Diameter: 100 mm
Material: PA to HDPE
Colour: Black to Clear
Factory Location: Spain
Normal Results using Virgin Material
Time: 7:00 Hours
Virgin Material: 800 Kgs of HDPE
EasyPurge Purging Compound:
Time: 1:30 Hours
Easypurge Purging Compound: 0.8 Kgs
Virgin Material: 120 Kgs of HDPE
In order to improve the efficiency of the purging compound, the temperature of the accumulator was increased by 30 °C.
Dose of 240ml of Easypurge purging agent was added into the hopper followed by virgin material.
This process was repeated 3 times.
The purging material emulsifies the rest of the impurities and pigments due to additives and surfactants contained in the formula.
After 1:30 hours there was no presence of PA Black colour.
Note: There was no presence of stains during the next 2 shifts reviewed after 24 hours.
PA to HDPE Material Change: Final Results
Presence of Black Specks