PROBLEM TO BE SOLVED: To provide a filter medium for an air filter being excellent in the adsorptivity of an aldehyde gas and having low re-discharge after adsorption and to provide an air filter.SOLUTION: A filter medium for an air filter is characterized by that: activated carbon and a deodorant composed of acid dihydrazide and an inorganic particle are held between two of layers formed with nonwoven fabrics made of two or more layers including an electret nonwoven fabric at a weight ratio (activated carbon : deodorant composed of acid dihydrazide and inorganic particle) of 15:85 to 35:65 and the sum of the holding amount of the activated carbon and the deodorant per unit area is 120-170 g/m2.SELECTED DRAWING: NoneCOPYRIGHT: (C)2019,JPO&INPIT【課題】アルデヒドガスの吸着性に優れ、かつ吸着後の再放出が少ないエアフィルター用濾材およびエアフィルターを得る。【解決手段】活性炭と、酸ジヒドラジドおよび無機粒子で構成される脱臭剤と、が、15:85~35:65の重量比(活性炭:酸ジヒドラジドおよび無機粒子で構成される脱臭剤)で、エレクトレット不織布を含む2層以上の不織布により形成される何れかの層間に保持されており、活性炭と脱臭剤との単位面積当たりの保持量の合計が120~170g/m2であることを特徴とする、エアフィルター用濾材。【選択図】なし
