Processing Machinery
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TPU product poor bonding
Problem Phenomenon
Insufficient bonding strength when composited with other materials.
Cause Analysis
TPU has low surface energy and is difficult to bond; surface contamination or improper treatment affects adhesion; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
①surface treatment (grinding/primer/plasma); ②select matching adhesives; ③clean the surface; ④do bonding strength testing; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
TPU bonding relies on surface treatment; special primers are a common solution; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems later
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