| 摘要 |
An air filter comprising a filter pack comprising a folded nanofiber filter medium, fitted to a filter frame through a seal material, the nanofiber filter medium being a filter medium for an air filter, comprising a nanofiber filter medium which, when a filter medium face velocity is 5.3 cm/s, has a performance index of collecting target particle diameter of 0.3 µm, 0.040 (1/Pa) or more, performance index of collecting target particle diameter of 0.1 µm, 0.030 (1/Pa) or more, and performance index of collecting target particle diameter of 0.05 µm, 0.050 (1/Pa) or more. By this, a high air volume and low pressure drop type high-performance air filter using a nanofiber filter medium can be provided.
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