| 摘要 |
The present invention concerns a high efficiency filter comprising unwoven fibers of a polymer, the filter being capable of filtering out at least 99.97 % of 0.3 mu m particulates in air flowing at 5 cm/sec, having a pressure drop of about 0.75 mm H2O to about 13 mm H2O, and having a dust load to filter weight per area ratio of about 1 to about 1.8. |
