Improving The Adhesion Onto Difficult Substrates

One of the major problems facing surface coating is the
adhesion between the coating and the substrate surface. Failure
at this interface renders the coating useless.

It has become common practice to call many types of plastics
difficult substrates, as getting coatings to adhere well to them
proves rather difficult. This problem is not confined to
radiation cured systems but is found in all coating systems.

This paper will review the ways adhesion can be improved and then
illustrate the problem with some specific work utilising
zirconium compounds, taken from the ink industry.