Abstract
The specific influence of the electron energy on the Electron Beam Curing process of coatings on metal surfaces is shown. For that purpose coatings of different thickness ( 20 to 80 microns) were cured at constant beam intensities and substrate velocity but varying the voltage of the beam in a range of 60 to 140 kV. The effectivity of the cure was tested by measuring gel content and hardness as well as double bond content of the coating films. Additionaly adhesion and elasticity of the samples were measured. The results show that for a maximum cure of a certain coating thickness there exists an optimum voltage. Additionally, the adjustment of the voltage to the thickness of the coating allows one to achieve a “profile cure” within the coating layer. Thereby it is possible to influence the mechanical properties, for instance elasticity and adhesion of the cured film to the substrate in a specific way.
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