| 摘要 |
PURPOSE:To achieve low pressure losses, compactness in construction, maintenance of high collecting efficiencies and long durabilities by laminating at least three layers of electret non-woven fabrics in the order of rough, intermediate and dense meshes according to roughness of meshes from upstream side to form a filter medium. CONSTITUTION:In a flue gas filter which is mounted on a thermal fixing type printer using a toner, copying machine, facsimile, etc., at least three layers of electret no-woven fabrics are laminated in the order of rough, intermediate and dense meshes from upstream side according to the roughness of meshes to form a filter medium 1. As a result, high collecting efficiencies and long durabilities can be maintained, while low pressure losses and compactness in construction are being kept. |
