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Particulate filters consisting of small cartridges containing materials that remove particulates (e.g., smoke, biological aerosols, radioactive particulates) from the air as they pass through. They do not offer protection from radiation. Cartridge filters usually consist of a set of fibers (e.g., cotton, fiberglass, polyester) woven together tightly; the particles are caught as the air passes through (i.e., perpendicular) to the woven material. Particulate filtration cartridges are intended for use in masks and/or personal respirators.
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