Extrusion & Post
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PMMA Material Mixing Delamination
Problem Phenomenon
Layered peeling appears on product surfaces; traceability finds other transparent material mixed into the hopper.
Cause Analysis
PMMA looks similar to transparent materials such as PC and PS and is easily mixed; after incompatible materials are mixed in, the interface delaminates, manifesting as surface peeling.; During on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based on experience alone.
Solution
①Strengthen raw material labeling and dedicated-zone management; ②thoroughly clean when changing materials; ③scrap all delaminated products; ④train against material mixing.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
Transparent material mixing is highly concealed; management systems are more reliable than after-the-fact sorting, and mixed batches should be isolated in full.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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