Print Quality Problems With Ink Jet Printing On UPVC Extrusion

Problem

High voltage static charges generated on uPVC profile during the extrusion process present a number of problems for ink jet printing systems:

• Attraction of dust to the surface being printed
• Deflection of the ink jet, resulting in poor print quality
• Over attraction of ink, leading to feathered edges
• Electronic failure of ink jet printing equipment
• Contamination of the directional deflector plate leading to lost production time due to cleaning.

Solution

The positioning of a powerful Model 915 ionising bar prior to the print head will neutralise the static charge and ensure:

• No dust attraction
• Improvement of print quality – eliminates feathering and ink deflection
• No electrostatically generated electronic failure
• A clean direction deflector plate – reduced cleaning and improved productivity

The same principle will apply to other chargeable surfaces which require ink jet printing.

NB: A model 940BE nozzle can be used as an alternative to a model 915 ionising bar.