Electrically charged, metal impregnated fibrous filter for metallurgical, chemical and biological purification of contaminated air in buildings

摘要

the air filter has a fibrous fleece carrier element (1) with a first, metal binding-agent (3) e.g. an amalgam forming material, applied to the upstream surface, which is electrically charged by connection to a source of potential (11,15,17). A second and third metal binding-agent layer may be applied to the fleece downstream of the first binding agent. Preferred Features: The first binding-agent is gold, and the second and third agents are silver, copper, tin or zinc. The agents are fiber coatings applied by vapor deposition of the metals on to the fiber.