Patent ID: 6800329
Filing Date: 2004-10-05
Classification: A23L,A23P,A61K,A61Q,C08J

Abstract:
Process for production of a product in the form of a sheet containing a substance to be dispensed by migration thereof into an environment in which the sheet is in contact, the process comprising:applying onto a surface of a substrate a coating of a spreadable solution, the coating having a smooth surface and the spreadable solution comprising at least one hydrophilic polymer in a solvent and the substance to be dispensed, the substrate having at least one rough surface and the spreadable solution being coated onto a rough surface of the substrate; drying the coated substrate by contacting it with a stream of heated air until the equilibrium relative humidity of the coated substrate is 50 to 75%; and removing the dried coating from the substrate in the form of said sheet, one surface of said sheet being smooth and the other, opposite surface of said sheet being rough.