Sumitomo Chemical Company, Limited

Masato Sonoda

Teruo Komori

Kazuo Sadaoka

This particulate filterhas a columnar ceramic honeycomb structureincluding first flow channelsand second flow channels. Adjacently to each of the first flow channels, the second flow channeland the other first flow channelare arranged through a partition wall portion forming each of the first flow channels. A sum total of areas of the inner faces of the first flow channelsper apparent unit volume of the ceramic honeycomb structureis 1.5 to 2.5 m/L; a number density of a total of the first flow channelsand the second flow channelsis 150 to 350 per unit square inch in a cross section perpendicular to an axis of the ceramic honeycomb structure; and a hydraulic diameter of each of the first flow channelsis 0.5 to 1.0 mm.

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Niihama, Japan

Masato Sonoda