PROBLEM TO BE SOLVED: To provide a filter capable of removing pollutant gas such as alkaline gas or sour gas included in the atmosphere, in addition to removal of a conventional dust particle, in an air-conditioning system to building air-conditioning, a hospital facility and a clean room.SOLUTION: An adhesive medium of a binder, melting fiber or adhesive powder is attached to nonwoven fabric or woven fabric composed of synthetic fiber or glass fiber and natural fiber having a fiber diameter of 0.3-50 μm and a thickness of 0.1-1.0 mm, and an ultrafine fiber layer having a fiber diameter of 0.01-0.5 μm is laminated, and the dust removal function is imparted as a laminate filter material of integrating the nonwoven fabric or the woven fabric and ultrafine fiber, and deodorization-gas removal performance is also enhanced by fixing a catalyst of reacting with a malodorous substance-harmful gas being an object to a surface of the ultrafine fiber layer, and the deodorization-gas removal filter having both the deodorization-gas removal function and the dust removal function is formed by sandwiching fine active charcoal in this.COPYRIGHT: (C)2014,JPO&INPIT【課題】ビル空調、病院施設やクリーンルームなどへの空調システムに於いて、従来の粉じん粒子の除去に加え、大気中に含まれる、アルカリ性ガスあるいは酸性ガスなどの汚染ガスを除去できるフィルタを提供する。【解決手段】繊維径が0.3~50μm、厚みが0.1~1.0mmの合繊繊維またはガラス繊維や天然繊維などからなる不織布あるいは織布にバインダ、溶融繊維あるいは接着パウダーの接着媒体を付けて、繊維径が0.01~0.5μmの超極細繊維層を積層させ、前記不織布あるいは織布と超極細繊維を一体化した積層ろ材として除じんの機能を持たせ、かつ対象となる悪臭物質・有害ガスと反応する触媒を超極細繊維層の表面に固定させて脱臭・ガス除去性能を高め、これに微細活性炭を挟み込んで脱臭・ガス除去機能と除じん機能の双方を併せ持つ脱臭・ガス除去用フィルタとしたものである。【選択図】図1
