Permanently corona charged filter materials of staple fibers
Permanent electrical charging of fibrous filter materials by corona is one of the ways to increase filtration efficiency without increase in the pressure drop. The authors present teoretical and experimental knowledge of charging process. Charging of various fibrous materials and their surface finish are the topics described in a part "Experimental". Various fibrous materials are corona charged by TANRET METHOD. The results of the experiments and new arising questions Írom the experiments are discussed in cons|usion.