| 摘要 |
With a fuel filter device (F), it is possible to reduce clogging of a filter member (1) as little as possible while improving the filtering accuracy of the filter member. The filter member includes at least two non-woven layers (12), wherein one non-woven layer has air holes with an average diameter different from those of the other non-woven layer. Among the non-woven layers, the non-woven layer located on an inner side of the filter member has the air holes with the average diameter smaller than those of the non-woven layers located on an outer side of the non-woven layer. Also, the non-woven layers are formed with a melt blown method, so that the filtering slope becomes gentle. <IMAGE> |
