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Poor printing adhesion of EAA film
Fenómeno del problema
After printing on EAA film, the ink adhesion is
Análisis de la causa
The surface polarity of EAA has poor affinity with ink; the corona treatment effect decays quickly; the ink system does not match EAA
Solución
1) Print immediately after corona treatment, within 24h; 2) Use EAA-specific ink; 3) Increase the corona power to 15-20kW/m² to ensure surface tension >42mN/m; 4) Flame treatment to assist in polarizing the surface
Conclusión clave
Poor printing adhesion is caused by insufficient surface polarity; corona treatment and special ink are the key
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