Extrusion & Post
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PETG UV-curable coating insufficient adhesion
Fenómeno del problema
After UV coating curing, the adhesion test is unqualified and the coating peels off.
Análisis de la causa
PETG has low surface energy and poor coating wetting, the surface has contamination or an oxide layer, and the UV formulation is improper.
Solución
Surface corona or plasma pretreatment; optimize the UV formulation by adding adhesion promoters; increase UV curing energy.
Conclusión clave
PETG UV coating adhesion depends on surface treatment and formulation optimization.
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