Common Issues in BOPP Film Printing:
Edge Adhesion and Film Breakage: BOPP film has poor tear resistance, requiring careful protection of the edges during production and transportation to prevent issues such as edge adhesion and film breakage.
Poor Color Registration in Printing: During the biaxial stretching of BOPP, inadequate control of local thickness can lead to the occurrence of "dog-ears," resulting in poor color registration during printing and affecting the overall print quality.
Low Surface Corona Discharge Value: The printing or composite surface of BOPP must undergo corona treatment to achieve a surface tension of 38 dyne/cm or above. This is essential for ensuring ink adhesion and meeting the required peel strength after lamination. Failure to meet these criteria renders the film unsuitable for use.
Poor Antistatic Performance: BOPP has poor antistatic properties, making it prone to static accumulation. This can lead to discharging during plate contact, causing issues such as "missing dots" and the appearance of "burrs" or "blank edges" in the printed patterns, significantly impacting print quality.