Yellow PP → Natural PP
Colour Change & 1st Carbon Removal Procedure on 280 Tonnes Engel
The Process
BBU highlights yellow degradation
Screw and Barrel must be this
clean before moving to the hot runner
Increased hot runner tips by 20°C and moulded with Poly Clear HR20 till clean
Moulded Poly Clear HR20
Moulded natural PP with reduced tip temps
Results
Normal Results:
- Stop running masterbatch
- Run PP natural parts
- 3 hrs colour staining/ gate scars
Aquapurge Results:
- 3 kg BBU (first carbon removal)
- 3 kg Poly Clear HR20
- 35 minutes