| abstract |
The present invention provides an air cleaning filter medium having low ventilation resistance, excellent deodorizing performance of aldehydes and hydrocarbon gases, high peel strength, excellent pleatability, and good visibility of dirt during use. An air cleaning filter medium in which a mixture of activated carbon, silica gel carrying a hydrazide compound and a thermoplastic resin is sandwiched between cover layers, wherein the silica gel carrying activated carbon and a hydrazide compound in the mixture is the above-mentioned. The silica gel content of the silica gel carrying the hydrazide compound in the mixture is 1 to 100 by weight with respect to the activated carbon, and the silica gel relative to the activated carbon in the mixture. The ratio of the average particle diameter is 0.5 to 2.0, the packing density ratio is 0.5 to 2.0, and the activated carbon and silica gel in the mixture each have an average particle diameter of 100 μm or more. Filter media for cleaning. [Selection figure] None |