Dynic Corporation

Kazumasa Mizui

Norio Umezu

An air filter material includes a laminate of an air inlet layer and an air outlet layer, and has a mean flow pore size of 20 &#x3bc;m to 40 &#x3bc;m, a minimum pore size of 2.4 &#x3bc;m to 3.8 &#x3bc;m, and a maximum pore size of 80 &#x3bc;m or less. The air inlet layer is a needle punched nonwoven fabric layer having an areal fiber weight of 55 g/mto 100 g/m. The air outlet layer is a laminated spunlace nonwoven fabric made by laminating at least two or more spunlace nonwoven fabric layers having an areal fiber weight of 20 g/mto 60 g/m, a mean flow pore size of 50 &#x3bc;m to 90 &#x3bc;m, a minimum pore size of 3.0 &#x3bc;m to 10.0 &#x3bc;m, and a maximum pore size of 180 &#x3bc;m or less.

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Saitama, Japan

Kazumasa Mizui