Pet Preform Injection Molding Colour Change with EasyPurge Purging Compound
OPAQUE White to Clear
Goal: Color change time reduction
Machine: Netstal 3500-3700
Extruder Diameter: 135 mm
Colour: Opaque White to Natural
Mould: 54 x 64 grs
Factory Location: USA
1. Original Prefrom Colour: Opaque White.
2. First, once the barrel and the piston were cleaned with Easypurge purging compound, virgin PET started to be injected into the mold.
Easy purge was dosed into mixer using Easypurge’s Automatic Purging System (APS).
3. Easypurge emulsifies colour pigments injecting preforms in automatic.
The process was finished using virgin PET to remove the rest of impurities and colour pigments emulsified by Easypurge.
The machines parameters were adjusted due to an increase of the MFI.
24 hours later we confirmed there was no presence of White PET contamination during the next two shifts.
Purging Compound used
Colour Time Changes
Pellet Purging compound