Extrusion & Post
1 views
LDPE Film Shrinkage Rate Fluctuation
Problem Phenomenon
The shrinkage rate of heat shrink film fluctuates between batches, and packaging effect is unstable.
Cause Analysis
Blow-up and haul-off process fluctuations change the orientation degree; melt index differences between raw material batches also affect shrinkage performance.; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience.
Solution
①Stabilize the blow-up ratio and draw ratio; ②Control raw material batch consistency; ③Test shrinkage rate and release by batch; ④Fix process parameters.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
The core indicator of shrink film is guaranteed by process stability; batch management is the key to fluctuation control.; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
Was this helpful?
0 people found this helpful
Thank you for your feedback!