Luftløs sprøjteovertrækning af en overflade med en viskøs vandig overtrækssammensætning

摘要

A process for the airless spray-coating of a surface with a viscous aqueous architectural coating composition wherein the composition is subjected to a pressure of from 2.5 to 5 bar and caused to flow through a nozzle comprising a plenum in communication with an outlet orifice having an elongated exit where a first dimension of the exit lies in a direction transverse to flow of the composition through the exit and is less than a third of a second dimension of the exit which also lies in a direction which is both transverse to flow of the composition through the exit but which is orthogonal to the direction of the first dimension. Also apparatus for the airless spray-coating of a surface with a viscous aqueous architectural coating composition, where the apparatus comprises preferably hand operated means for delivering the composition under pressure to a nozzle as described above. The process and apparatus enable the viscous compositions to be applied quickly using low pressures easily generated by a hand compressor.