Static Application in Flexo Printing Machines
Flexo printing machines are subject to unfavorable disturbance of static charges on the surface of the film to be printed due to reasons such as separation, friction. In this case, dust and small particles on the area around the surface to be printed will adhere to the surface and no high quality printing can be effected. If it is printed in this way, it is observed that the printed film roll is opened in another process (backing) and the dusted points which are printed stick to the other surface. Also high static charge on the surface to be printed causes the ink to disperse leading into low quality printing and consequent scraps.
To avoid those problems, antistatic bars are placed for neutralization of static charges to location the film roll in unwinded and also after the process where it is winded again. Accordingly a high quality production is provided. In multicolor printings it is recommended to place antistatic bars after each drying process. Material will be charged through the hot tunnel leading into problem at next color printing.