Extrusion & Post
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Poor ABS painting/printing adhesion
Problembeschreibung
After ABS products are painted or printed, paint peeling and poor ink adhesion appear, and the cross-cut test fails.
Ursachenanalyse
Residual mold release agent, hand sweat and oil on the surface, or lubricant in the formula precipitates to the surface, reducing the surface energy, leading to poor wetting and adhesion of the coating; the coating also easily cracks at areas of high internal stress.
Lösung
①Try not to use or use less mold release agent in '2079851475616104452; ②clean the surface with solvent/plasma before painting; ③evaluate the lubricant precipitation of the material; ④reduce internal stress; ⑤do cross-cut adhesion verification.
Wichtigste Erkenntnis
90% of ABS poor adhesion is 'surface contamination': clean first before talking about paint; mold release agent is the number one suspect, lubricant precipitation is an invisible killer, and internal stress causes the coating to be cracked from the inside.
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