| 摘要 |
PROBLEM TO BE SOLVED: To provide a dust filter bag having sufficient strength and capable of sufficiently removing even superfine dust. SOLUTION: This dust filter bag consists of a paper layer and a laminated fiber layer, and the fiber layer is formed of a synthetic polymer fiber. The paper layer is arranged within the bag when used as a dust filter bag, the fiber layer includes a molten-polymer region 9, and the fiber layer itself is additionally reinforced by the region 9. Further, the fiber layer is joined to the paper layer in the molten-polymer region 9, and the molten-polymer region occupies 0.5-10% of the total surface area of the fiber layer.
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