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Free jet coating application is today’s most common blade coater type for modern high capacity machines. The study reported in this paper was initiated in order to investigate on a scientific basis the role of some important parameters governing this process. The so called “backflow” phenomenon was found to be dependent on speed as well as on the real impingement angle of the jet of liquid coating color impinging on the paper. The latter being effected not only by the machine setting, but also by operating conditions. When investigating the forces at the point of impingement, there was the idea to get an estimate to which extend these may contribute to sheet tensioning on one side and to requirements on the rheology of the coating color, respectively.
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Parameters Affecting Coating Color Impact on the Travelling Sheet, 2006 Coating & Graphic Arts Confe