| abstract |
The present invention relates to a method of impregnating paper with a suspension of a molecular sieve in waterglass, such as soda waterglass or potassium waterglass, wherein the impregnated paper can be used as a dehumidifying element, and wherein the method comprises the steps ofa) providing a piece of paper, such as facing paper and/or fluted paper;b) immersing the paper into a highly concentrated waterglass solution in which a molecular sieve has been suspended, at a temperature in the range of 45-95° C., wherein said suspension of highly concentrated waterglass/molecular sieve has a viscosity of at least 350 mPa.s at a temperature of 45° C.; andc) cooling the immersed paper with air at a temperature of at most 35° C. and preferably at most 25° C. |