| 摘要 |
<p>A process for the manufacture of a filtration medium comprises air-laying fibres to form a non-woven web. The process may be a roller-based air-laying process, in which raw fibres are transferred to a rapidly rotating cylinder or roller clothed with teeth, or a sifting-based air-laying process in which the fibres are circulated over a mesh screen. In either case, the fibres are dispersed in a moving air stream and deposited to form the non-woven web. Filtration media produced in accordance with the invention are electrostatically charged and are characterized by a high degree of isotropicity.</p> |
