PROBLEM TO BE SOLVED: To provide a deodorization filter capable of exhibiting a deodorizing performance sufficiently while enhancing an adhesiveness and a rigidity, and excellent in a pressure loss and a powder dust holding quantity.SOLUTION: A filter medium is made of a laminate layer structure, in which an adsorbent layer made of an absorbent and an adhesive agent is sandwiched in 10-450 g/m2 between base material layers. At least one layer of the base material layers is a laminate sheet, in which there are laminated a nonwoven fabric of heat-seal type long fibers having a basis weight of 5 to 40 g/m2 and a melt blow unwoven fabric, and an absorption layer and a nonwoven fabric made of the heat-seal type long fibers of said laminate sheet are laminated adjacent to each other and are heat-sealed.COPYRIGHT: (C)2015,JPO&INPIT【課題】本発明は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10~450g/m2挟み込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目付5~40g/m2である熱融着系長繊維からなる不織布とメルトブロー不織布を積層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
