Extrusion & Post
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Poor Printing Adhesion of LDPE Film
Fenómeno del problema
Printing ink adhesion is poor and ink falls off.
Análisis de la causa
LDPE surface energy is low and slip agent blooming further reduces surface energy; corona treatment is insufficient or the aging after treatment is too long.
Solución
①Strengthen corona treatment and test dyne value; ②print promptly after treatment; ③evaluate slip agent blooming; ④primer treatment if necessary.
Conclusión clave
Printing adhesion = dyne value + aging.
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