Material Drying
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PA6 Printing and Coating Adhesion
Problembeschreibung
PA6 parts show ink loss in surface printing and coating peeling, and the adhesion test fails
Ursachenanalyse
PA6 has low surface energy, which is even worse with mold release agent residue, making ink and coatings difficult to wet and adhere; surface state changes after moisture absorption further weaken the interfacial bonding; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Lösung
①Flame or plasma treatment before printing to increase surface energy; ②clean to remove mold release agent residue; ③print as soon as possible after treatment to prevent surface energy decay; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Wichtigste Erkenntnis
PA6 surface treatment is the decisive process for adhesion; only with flame or plasma treatment plus aging management can printing quality be guaranteed; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence
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