Abstract:

In order to achieve orange petal shape bicompinent spunbond-spunlace nonwovens with excellent comprehensive filtration and mechanical properties, single factor experiment was adopted to investigate the influence of fiber web density on pore size, filter performance, tensile properties and tear properties of the bicomponent nonwovens, The surface and cross-section morphologies of bicomponent fibers and spunbond-spunlace nonwovens were also observed. The results show that the cross section morphologies of bi-component fibers was orange petal shape, and the fibers in surface of nonwovens were mostly split into superfine fibers, while the intermediate fibers kept complete hollow structure.  The mean pore size of bicomponent spunbond-spunlace nonwovens was between 7 and 10 μm and decreased with increase of web density, and the filtration efficiency increased correspondingly. The web density had remarkable influence on the longitudinal and lateral tensile, elongation and tearing properties of bicomponent spunbond-spunlace nonwovens. With the increase of the webdensity, the above mechanical properties were all enhanced, but these properties also existed difference between longitudinal and lateral directions due to the web peocessing method.

Key words: bicomponent fiber, spunlace nonwoven, filtration property, mechanical property