Toyo Boseki Kabushiki Kaisha

Honda Motor Co., Ltd.

Sadahito Goto

Yasunori Matsubara

Yoshihiko Kubo

Shinichi Minemura

Mitsuhiko Akiyama

The invention provides an air-cleaner filter material for an internal combustion engine, which comprises a dust-collecting layer comprising a melt-blown nonwoven fabric having a maximum pore size of 100 &#x3bc;m or less and a dust-retaining layer arranged upstream of the dust-collecting layer and laminated integrally by heat fusion with, the dust-collecting layer, comprising a thermal-bond nonwoven fabric having fibers with two or more fiber diameters arranged in the order of increasing the proportion of smaller fiber diameter in the direction from the upstream to downstream side, wherein the in-plane of the filter material has a portion of high fiber density and a portion of low fiber density, and the portion of high fiber density occurs in a lattice pattern.

Air-cleaner filter material for internal combustion engine and air-cleaner element

A filter unit comprising a filter part made of an adsorbent-bearing filtration material and characterized in that said filter part is integrally molded with a filter holding frame made of a thermoplastic resin and that the adsorbent of the filter part is packed to the position contacting the filter holding frame.

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Otsu, Japan

Sadahito Goto