Black ABS V0 → Natural PP

Material Change and Carbon Removal

The Process

Start up with BBU
Indication of poor shut down procedure

Max Back Pressure = More carbon
Indicates Heat sensitive materials processed

First two shots; zero specs

First 12 acceptable mouldings,
still no colour/carbon

1 hour production
50 products
0 black specs

Results

Normal results:

• Purge with 30 kg of PP
• Pull and clean nozzle
• Black spec/colour lines for 3 hours: 171 kg

Aquapurge results:

• 25 kg BBU
• 25 minutes
• 0 black specs

One Year On:

• Refined shut down procedure

You can also read this Case Study here