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An Investigation into Fiber Dispersion Behavior in Water with Reference to Wet-Lay Nonwoven Technology

This article reports on fiber dispersion behavior in water with reference to wet-lay nonwoven technology. The effects of fiber material characteristics and dispersion process conditions on the quality of the nonwoven webs were examined. The webs were characterized for their area-based uniformity by means of an imaging system in conjunction with quadrat analysis. It was found that the area occupied by the fibers in the webs followed the lognormal probability distribution and the angular orientation of the fibers in the webs followed the bimodal distribution. The web prepared by using scoured fibers was almost equally uniform as compared to the web prepared by using bleached fibers. The web made up of shorter and coarser fibers was more uniform than that made up of longer and finer fibers. The higher concentration of cationic surfactant resulted in more uniform webs. It was observed that the webs prepared at optimum stirring rate and dispersion time were found to possess the highest uniformity.