PROBLEM TO BE SOLVED: To provide a filter medium for a deodorization filter which can enhance an adhesive property and a rigidity while exhibiting a full deodorization performance, and has excellent pressure loss and dust holding amount.SOLUTION: In a filter medium for a deodorization filter comprising a laminate structure in which an adsorption layer comprising an adsorbent and an adhesive is interposed between base material layers, at least one of the base material layers comprises a laminate sheet in which a nonwoven cloth of heat-seal system long fibers and an electret needle-punch nonwoven cloth are laminated and integrated with each other by a needle punch, the adsorption layer and the nonwoven cloth of heat-seal system long fibers in the laminate sheet are laminated and heat-sealed so as to be adjacent to each other.COPYRIGHT: (C)2015,JPO&INPIT【課題】接着性と剛性を高めながらも脱臭性能を十分に発揮でき、圧力損失や粉塵保持量に優れた脱臭フィルター用濾材を提供する。【解決手段】基材層間に吸着剤と接着剤からなる吸着層を挟みこんだ積層構造体からなる濾材であって、基材層の少なくとも一層が熱融着系長繊維からなる不織布とエレクトレットニードルパンチ不織布をニードルパンチで積層一体化した積層シートであり、吸着層と前記積層シートの熱融着系長繊維からなる不織布とが隣接するように積層され、熱融着されている脱臭フィルター用濾材。【選択図】なし
