Extrusion & Post
8 مشاهدة
PETG UV-curable coating insufficient adhesion
ظاهرة المشكلة
After UV coating curing, the adhesion test is unqualified and the coating peels off.
تحليل الأسباب
PETG has low surface energy and poor coating wetting, the surface has contamination or an oxide layer, and the UV formulation is improper.
الحل
Surface corona or plasma pretreatment; optimize the UV formulation by adding adhesion promoters; increase UV curing energy.
الخلاصة الأساسية
PETG UV coating adhesion depends on surface treatment and formulation optimization.
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