Processing Machinery
3 Aufrufe
EVA Hot Melt Adhesive Weak Bonding
Problembeschreibung
The bonded parts open and fall off.
Ursachenanalyse
Contamination of the adhered surface or low temperature causes poor wetting of the adhesive; exceeding the open time beyond the adhesive window also causes failure.; During on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Lösung
①Clean the adhered surface; ②control the substrate temperature; ③complete the bonding within the open time; ④match the adhesive type with the substrate.; After adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Wichtigste Erkenntnis
Bonding quality is a combination of surface state and process timing; open time management is often overlooked.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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