Extrusion & Post
8 views
PVA surface snakeskin pattern
Problem Phenomenon
PVA extruded product surface has snakeskin-like irregular texture
Cause Analysis
Extrusion temperature on the low side, uneven melt elastic recovery; uneven die temperature distribution
Solution
1) Raise extrusion temperature to the processing temperature range; 2) Homogenize die temperature ±2°C; 3) Reduce extrusion rate to reduce elastic recovery
Key Takeaway
Snakeskin pattern is caused by low-temperature extrusion and elastic recovery; raising temperature and reducing speed are the key
Was this helpful?
0 people found this helpful
Thank you for your feedback!