Molding Process
2 views
LDPE Film Surface Orange Peel/Melt Fracture
Problem Phenomenon
The film surface is orange-peel rough and gloss decreases.
Cause Analysis
Exit shear stress exceeds the critical value; die temperature is low and line speed is high.
Solution
①Raise the die temperature by 3~5℃; ②reduce line speed; ③polish die lips; ④add PPA.
Key Takeaway
Film surface orange peel = exit shear exceeding the limit.
Was this helpful?
0 people found this helpful
Thank you for your feedback!