Molding Process
5 views
PPSU product yellowing and browning
Problem Phenomenon
PPSU transparent amber products further darken and turn brown after processing.
Cause Analysis
Excessively high processing temperature or excessively long residence time causes thermo-oxidative degradation and color deepening.
Solution
Control barrel at 340-360°C (low limit); nitrogen protection; shorten residence.
Key Takeaway
Although PPSU is ultra-high temperature stable, it still has a degradation boundary.
Was this helpful?
0 people found this helpful
Thank you for your feedback!