However, if viscosity is too low, film sagging will result on vertical surfaces leading to unevenness in coating. Spray application requires a viscosity as low as is feasible to optimise atomisation. After the spray nozzle atomises the paint, only a portion of the paint droplets coat a vehicle surface. In modern automotive coating processes, paint is applied by spraying. Virtually, all coaters understand the importance of superior in-line viscosity management in the automotive coating process. In addition, process parameters such as pressure, flow rate and coating speed are all dependent upon coating material viscosity. It assures the quality and lifetime of the coat. Viscosity controls the thickness and adherence of the coating. Performance parameters such as coating film build, colour match, voids and chemical resistance are all linked directly to the viscosity of the liquid coating at the point of application. Paint and coating quantity and quality has an obvious impact on manufacturing costs, sales and maintenance.Ĭorrect paint viscosity is the key to good paint quality. Automotive coatings and the processes used to coat automobile surfaces use advanced technologies capable of producing durable surfaces, high quality appearance, while maximising efficiency and meeting environmental regulations.
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