| 摘要 |
A method of impregnating paper with waterglass, such as soda waterglass or potassium silicate, said impregnated paper being usable as a dehumidifying element, wherein the method comprises the steps of a) providing paper sheet (18,36), such as facing paper and/or corrugated paper; b) immersing the paper (18,36) into a highly concentrated waterglass solution (14,32) at a temperature within the range of 45-95 DEG C, with said highly concentrated waterglass solution (14,32) having a viscosity of at least 350 mPa:s at a temperature of 45 DEG C; and without drying c) cooling (20,38) the immersed paper (18,36) with air at a temperature of 35 DEG C at the highest and preferably at a highest temperature of 25 DEG C. The two paper webs (18,36) may be joined (40,42) to form an impregnated corrugated paperboard (44). <IMAGE> |
