Abstract
In order to improve the filtering effect of the bag filter, ultrafine sea-island fiber nonwovens is used to produce ultra-fine structure dust filter material. At the beginning, sea-island superfine fiber needle-punched nonwoven production technology is introduced. And then testament is made to tensile breaking strength, elongation at break, bursting ,air permeability, capture efficiency of dust with different diameters of 0.3μm, 0.5μm, 1μm and 3μm. At last, the performing difference of the sea-island superfine fiber ultrafiltration bag and its counterpart from the market is compared and analyzed. [1,2] The experimental results showed that the average breaking strength of Sea island superfine fiber ultrafiltration enhancement of non-woven fabric in warp direction is 1931N, its average elongation at break 32.7%, its average of Zonal breaking strength 2561N, its average elongation at break 22.6%, its bursting of average strength 1998.07N, its permeability as high as 428.62×103 m3/s, its filtering precision 82.4% under 0.3μm diameter and 100% under 3μm diameter.
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