Extrusion & Post
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PETG poor adhesion during printing
Problembeschreibung
The ink adhesion on the PETG product surface is insufficient, easily peeling off or being scratched.
Ursachenanalyse
PETG surface energy is low (about 30-36mN/m), the surface has mold release agent or oil contamination residue, and the ink system does not match.
Lösung
Corona treat the product surface to a dyne value ≥42mN/m; clean with alcohol before printing; select an ink system suitable for polyester.
Wichtigste Erkenntnis
PETG printing adhesion depends on surface treatment and ink matching.
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