Material Drying
2 views
LDPE Regrind Drying
Problem Phenomenon
LDPE film blended with regrind shows bubbles.
Cause Analysis
Regrind (especially edge trim) is exposed and absorbs moisture, and is fluffy and traps air; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; This mechanism has been repeatedly verified by industry literature and should be confirmed first during troubleshooting.
Solution
Dry regrind at 80℃; regrind pelletizing for densification; blending ratio control; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability; Change only one variable at a time and record parameter changes to facilitate locating effective measures.
Key Takeaway
LDPE regrind is used with drying plus densification; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; Incorporate this case into the defect archive as a troubleshooting reference for similar future problems.
Was this helpful?
0 people found this helpful
Thank you for your feedback!