Pet Preform Injection Molding Colour Change with EasyPurge Purging Compound
OPAQUE White to Clear
Goal: Color Change and Scrap reduction
Extruder Diameter: 110 mm
Colour: Opaque White to Natural
Mould: 72 x 22 grs
Factory Location: Mexico
24 hours later we confirmed there was no presence of White PET contamination during the next two shifts.
The machines parameters were adjusted due to an increase of the MFI.
Normal Results using Pellet Purging Compound
Time: 3:30 Hours
Scrap: 600 Kgs
Purging Compound consumed: 43 Kgs
Using EasyPurge Purging Compound
Time: 1:30 Minutes
Scrap: 150 Kgs
Purging Compound used: 760ml
Virgin Material Consumed: 76 Kgs
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.
Purging Compound used
Colour Time Change
Pellet Purging compound