Air filter and air filter assembly for cleaner made by using...

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 39/16 (2006.01) A47L 9/10 (2006.01) A47L 9/12 (2006.01) B32B 5/24 (2006.01) D04H 1/46 (2006.01)

Patent

CA 2704223

The invention aims at providing an air filter which is improved in the tight adhesion between an ePTFE membrane and a permeable support material without impairing the mechanical strength and permeability of the support material. An air filter produced by laminating a permeable support material (1) having a region wherein fibers different in fiber diameter are entangled and a porous polytetrafluoroethylene membrane (2), wherein the mean fiber diameter of the membrane-side face of the support material (1) is smaller than that of the back of the support material (1).

La présente invention a pour objectif de fournir un filtre à air présentant une meilleure adhésion d'étanchéité entre une membrane en ePTFE et un substrat perméable à l'air sans altérer la résistance mécanique et la perméabilité à l'air du substrat. Un filtre à air produit par stratification d'un substrat perméable à l'air (1) ayant une région dans laquelle des fibres ayant un diamètre de fibre différent sont enchevêtrées et une membrane poreuse en polytétrafluoroéthylène (2), le diamètre de fibre moyen de la face côté membrane du substrat (1) étant inférieur à celui de l'arrière de substrat (1).

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