Abstract

Many technologies have been used to produce finer fibers due to their super advantages such as higher specific surface
area, filtration/barrier property and absorption, as well as moderate porosity. Finer fibers are thus the great interest of
many researchers in the nonwoven world, and many technologies have been used to make finer fibers. In this study, the
authors addressed a novel avenue to produce finer fibers by splitting side-by-side bicomponent meltblown nonwovens
composed of polyethylene terephthalate (PET) and polyamide 6 (PA6) by means of ultrasonic wave, in caustic soda and
benzyl alcohol solutions respectively. The efficiency of fiber splitting was characterized in terms of dyeing
ratio/percentage of the tested webs. Other properties were also examined, including fiber diameter, web weight loss, air
permeability and thickness. In addition, SEM was used to observe fiber damage and fiber structure in the relevant webs.

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