Meta - and the bag filter which includes the scrim less filter felt of the para - aramide staple fiber

摘要

As for this invention, the tubular part, being the bag filter which possesses the closed end and the opening end, the tubular part, includes the scrim less filter felt which becomes from the needle punch bat of homogeneity blend of the fiber which consists of with the meta - aramide staple fiber of 50 - 79 percentages by weight and the para - aramide staple fiber of 21 - 50 percentages by weight substantially, the needle punch bat, per 1 square yards 10 - 17 ounces (per 1 square meters 340 - 580 grams) has basic weight, it regards the bag filter.