Patent ID: 8431187
Filing Date: 2013-04-30
Classification: B01D

Abstract:
1. A method of producing a filter medium for treating medium and high temperature exhaust gas using foam coating, comprising: 1) mixing a heat resistant water-soluble resin, a foam stabilizer, a foaming agent and a thickener at a ratio of 1:0.05˜0.1:0.01˜0.02:0.01˜0.05 by weight to prepare a coating solution; 2) treating the coating solution using a foam generator to prepare a foam solution, and then applying the foam solution on a surface of an inorganic fiber fabric support; 3) drying the inorganic fiber fabric support coated with the foam solution; 4) pressing the dried inorganic fiber fabric support at a pressure from 200 psi to 700 psi; 5) heat-treating the pressed inorganic fiber fabric support at a temperature from 340° C. to 400° C.; and 6) cooling the heat-treated inorganic fiber fabric support, wherein the heat resistant water-soluble resin is represented by the formula (CF