Extrusion & Post
1 views
TPU melt fracture causing surface defects
Problem Phenomenon
Periodic irregular wrinkles on the extrusion and injection surfaces
Cause Analysis
The shear stress at the die exit exceeds the critical value, elastic instability
Solution
Reduce the extrusion speed, raise the die temperature, increase the gap
Key Takeaway
A typical rheological problem in extrusion processing
Was this helpful?
0 people found this helpful
Thank you for your feedback!