| abstract |
A method for coating or impregnating a substrate such as a textile fabric with a treatment material such as a water or stain resistant coating comprises the steps of (a) combining a substrate and an inert transfer vehicle (e.g., a sheet material) in a pressure vessel, the inert transfer vehicle carrying the treatment material; (b) pressurizing the vessel with a carbon dioxide medium; and then (c) agitating the substrate and the inert transfer vehicle together in the pressure vessel with the substrate and the inert transfer vehicle at least periodically immersed in the carbon dioxide medium so that the treatment material is transferred from the inert transfer vehicle to the substrate. |